diff --git a/dist/assemblyscript.js b/dist/assemblyscript.js
index 1157c9b9..1006e8ef 100644
--- a/dist/assemblyscript.js
+++ b/dist/assemblyscript.js
@@ -1,3 +1,3 @@
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s.BITWISE_OR;break;case 94:if("^"==t)return s.BITWISE_XOR;break;case 61:if("=="==t)return s.EQ;break;case 33:if("!="==t)return s.NE;break;case 62:if(">"==t)return s.GT;if(">="==t)return s.GE;if(">>"==t)return s.BITWISE_SHR;if(">>>"==t)return s.BITWISE_SHR_U;break;case 60:if("<"==t)return s.LT;if("<="==t)return s.LE;if("<<"==t)return s.BITWISE_SHL}break;case p.DecoratorKind.OPERATOR_PREFIX:switch(t.charCodeAt(0)){case 43:if("+"==t)return s.PLUS;if("++"==t)return s.PREFIX_INC;break;case 45:if("-"==t)return s.MINUS;if("--"==t)return s.PREFIX_DEC;break;case 33:if("!"==t)return s.NOT;break;case 126:if("~"==t)return s.BITWISE_NOT}break;case p.DecoratorKind.OPERATOR_POSTFIX:switch(t.charCodeAt(0)){case 43:if("++"==t)return s.POSTFIX_INC;break;case 45:if("--"==t)return s.POSTFIX_DEC}}return s.INVALID}!function(e){e[e.INVALID=0]="INVALID",e[e.INDEXED_GET=1]="INDEXED_GET",e[e.INDEXED_SET=2]="INDEXED_SET",e[e.UNCHECKED_INDEXED_GET=3]="UNCHECKED_INDEXED_GET",e[e.UNCHECKED_INDEXED_SET=4]="UNCHECKED_INDEXED_SET",e[e.ADD=5]="ADD",e[e.SUB=6]="SUB",e[e.MUL=7]="MUL",e[e.DIV=8]="DIV",e[e.REM=9]="REM",e[e.POW=10]="POW",e[e.BITWISE_AND=11]="BITWISE_AND",e[e.BITWISE_OR=12]="BITWISE_OR",e[e.BITWISE_XOR=13]="BITWISE_XOR",e[e.BITWISE_SHL=14]="BITWISE_SHL",e[e.BITWISE_SHR=15]="BITWISE_SHR",e[e.BITWISE_SHR_U=16]="BITWISE_SHR_U",e[e.EQ=17]="EQ",e[e.NE=18]="NE",e[e.GT=19]="GT",e[e.GE=20]="GE",e[e.LT=21]="LT",e[e.LE=22]="LE",e[e.PLUS=23]="PLUS",e[e.MINUS=24]="MINUS",e[e.NOT=25]="NOT",e[e.BITWISE_NOT=26]="BITWISE_NOT",e[e.PREFIX_INC=27]="PREFIX_INC",e[e.PREFIX_DEC=28]="PREFIX_DEC",e[e.POSTFIX_INC=29]="POSTFIX_INC",e[e.POSTFIX_DEC=30]="POSTFIX_DEC"}(s=t.OperatorKind||(t.OperatorKind={}));var y,E,f=new Map,T=function(e){function t(t){void 0===t&&(t=null);var r=e.call(this,t)||this;return r.diagnosticsOffset=0,r.elementsLookup=new Map,r.instancesLookup=new Map,r.typesLookup=f,r.typeAliases=new Map,r.fileLevelExports=new Map,r.moduleLevelExports=new Map,r.arrayBufferInstance=null,r.arrayPrototype=null,r.stringInstance=null,r.mainFunction=null,r.abortInstance=null,r.memoryAllocateInstance=null,r.hasGC=!1,r.gcAllocateInstance=null,r.gcLinkInstance=null,r.gcMarkInstance=null,r.gcHeaderSize=0,r.gcHookOffset=0,r.resolver=new h.Resolver(r),r.sources=[],r}return n(t,e),t.prototype.getSource=function(e){for(var t=this.sources,r=0,n=t.length;r<n;++r){var i=t[r];if(i.normalizedPath==e)return i}return null},t.prototype.lookupSourceByPath=function(e){var t;return this.getSource(e+".ts")||this.getSource(e+"/index.ts")||this.getSource((t=o.LIBRARY_PREFIX+e)+".ts")||this.getSource(t+"/index.ts")},t.prototype.initialize=function(e){var t,r,n,s;this.options=e,this.typesLookup=new Map([["i8",l.Type.i8],["i16",l.Type.i16],["i32",l.Type.i32],["i64",l.Type.i64],["isize",e.isizeType],["u8",l.Type.u8],["u16",l.Type.u16],["u32",l.Type.u32],["u64",l.Type.u64],["usize",e.usizeType],["bool",l.Type.bool],["f32",l.Type.f32],["f64",l.Type.f64],["void",l.Type.void],["number",l.Type.f64],["boolean",l.Type.bool]]),this.setConstantInteger("ASC_TARGET",l.Type.i32,i64_new(e.isWasm64?2:1)),this.setConstantInteger("ASC_NO_TREESHAKING",l.Type.bool,i64_new(e.noTreeShaking?1:0,0)),this.setConstantInteger("ASC_NO_ASSERT",l.Type.bool,i64_new(e.noAssert?1:0,0)),this.setConstantInteger("ASC_MEMORY_BASE",l.Type.i32,i64_new(e.memoryBase,0)),this.setConstantInteger("ASC_OPTIMIZE_LEVEL",l.Type.i32,i64_new(e.optimizeLevelHint,0)),this.setConstantInteger("ASC_SHRINK_LEVEL",l.Type.i32,i64_new(e.shrinkLevelHint,0)),this.setConstantInteger("ASC_FEATURE_MUTABLE_GLOBAL",l.Type.bool,i64_new(e.hasFeature(2)?1:0,0)),this.setConstantInteger("ASC_FEATURE_SIGN_EXTENSION",l.Type.bool,i64_new(e.hasFeature(1)?1:0,0));for(var u=new Array,h=new Map,d=new Array,_=new Array,m=0,g=this.sources.length;m<g;++m){var E=this.sources[m],f=new A(this,E);this.elementsLookup.set(f.internalName,f),this.currentFilespace=f;for(var T=E.statements,I=0,v=T.length;I<v;++I){var C=T[I];switch(C.kind){case p.NodeKind.CLASSDECLARATION:this.initializeClass(C,d,_);break;case p.NodeKind.ENUMDECLARATION:this.initializeEnum(C);break;case p.NodeKind.EXPORT:this.initializeExports(C,h);break;case p.NodeKind.FUNCTIONDECLARATION:this.initializeFunction(C);break;case p.NodeKind.IMPORT:this.initializeImports(C,h,u);break;case p.NodeKind.INTERFACEDECLARATION:this.initializeInterface(C);break;case p.NodeKind.NAMESPACEDECLARATION:this.initializeNamespace(C,d,_);break;case p.NodeKind.TYPEDECLARATION:this.initializeTypeAlias(C);break;case p.NodeKind.VARIABLE:this.initializeVariables(C)}}}for(m=0;m<u.length;){var N=u[m];if(X=N.declaration)(x=this.tryLocateImport(N.externalName,h))?(this.elementsLookup.set(N.localName,x),u.splice(m,1)):(x=this.tryLocateImport(N.externalNameAlt,h))?(this.elementsLookup.set(N.localName,x),u.splice(m,1)):(this.error(c.DiagnosticCode.Module_0_has_no_exported_member_1,X.range,X.parent.path.value,X.externalName.text),++m);else(x=this.elementsLookup.get(N.externalName))?(this.elementsLookup.set(N.localName,x),u.splice(m,1)):(x=this.elementsLookup.get(N.externalNameAlt))?(this.elementsLookup.set(N.localName,x),u.splice(m,1)):(assert(!1),++m)}try{for(var O=i(h),S=O.next();!S.done;S=O.next()){var L=a(S.value,2),b=L[0],k=L[1],R=k,x=void 0;do{if(!R.isReExport){(x=this.elementsLookup.get(R.externalName))||(x=this.elementsLookup.get(R.member.name.text))?this.setExportAndCheckLibrary(b,x,k.member.externalName):this.error(c.DiagnosticCode.Cannot_find_name_0,k.member.range,k.member.name.text);break}if(x=this.fileLevelExports.get(R.externalName)){this.setExportAndCheckLibrary(b,x,k.member.externalName);break}(R=h.get(R.externalName))||this.error(c.DiagnosticCode.Module_0_has_no_exported_member_1,k.member.externalName.range,k.member.parent.path.value,k.member.externalName.text)}while(R)}}catch(e){t={error:e}}finally{try{S&&!S.done&&(r=O.return)&&r.call(O)}finally{if(t)throw t.error}}var F=this.resolver;for(m=0,g=d.length;m<g;++m){var D=d[m],B=D.declaration,U=assert(B.extendsType),P=F.resolveIdentifier(U.name,null);if(P)if(P.kind==y.CLASS_PROTOTYPE){var w=P;D.basePrototype=w}else this.error(c.DiagnosticCode.A_class_may_only_extend_another_class,U.range)}var M=e.globalAliases;if(M)try{for(var G=i(M),K=G.next();!K.done;K=G.next()){var z=a(K.value,2),H=z[0],V=z[1];if(V.length){if(!(x=this.elementsLookup.get(V)))throw new Error("element not found: "+V);this.elementsLookup.set(H,x)}}}catch(e){n={error:e}}finally{try{K&&!K.done&&(s=G.return)&&s.call(G)}finally{if(n)throw n.error}}if(this.elementsLookup.has("ArrayBuffer")){x=assert(this.elementsLookup.get("ArrayBuffer"));assert(x.kind==y.CLASS_PROTOTYPE),this.arrayBufferInstance=F.resolveClass(x,null)}if(this.elementsLookup.has("Array")){x=assert(this.elementsLookup.get("Array"));assert(x.kind==y.CLASS_PROTOTYPE),this.arrayPrototype=x}if(this.elementsLookup.has("String")){x=assert(this.elementsLookup.get("String"));if(assert(x.kind==y.CLASS_PROTOTYPE),W=F.resolveClass(x,null))if(this.typesLookup.has("string")){var X=x.declaration;this.error(c.DiagnosticCode.Duplicate_identifier_0,X.name.range,X.programLevelInternalName)}else this.stringInstance=W,this.typesLookup.set("string",W.type)}x=assert(this.elementsLookup.get("start"));(assert(x.kind==y.FUNCTION_PROTOTYPE),this.startFunction=x,this.moduleLevelExports.has("main"))&&((x=this.moduleLevelExports.get("main").element).kind!=y.FUNCTION_PROTOTYPE||x.isAny(o.CommonFlags.GENERIC|o.CommonFlags.AMBIENT)||(x.set(o.CommonFlags.MAIN),this.mainFunction=x));if(this.elementsLookup.has("abort")){x=this.elementsLookup.get("abort");assert(x.kind==y.FUNCTION_PROTOTYPE),(W=this.resolver.resolveFunction(x,null))&&(this.abortInstance=W)}if(this.elementsLookup.has("memory")){var W,Y=(x=this.elementsLookup.get("memory")).members;if(Y)if(Y.has("allocate"))x=assert(Y.get("allocate")),assert(x.kind==y.FUNCTION_PROTOTYPE),(W=this.resolver.resolveFunction(x,null))&&(this.memoryAllocateInstance=W)}if(this.elementsLookup.has("__gc_allocate")&&this.elementsLookup.has("__gc_link")&&this.elementsLookup.has("__gc_mark")){x=this.elementsLookup.get("__gc_allocate");assert(x.kind==y.FUNCTION_PROTOTYPE);var Q=assert(this.resolver.resolveFunction(x,null)),q=Q.signature;assert(2==q.parameterTypes.length),assert(q.parameterTypes[0]==this.options.usizeType),assert(q.parameterTypes[1].signatureReference),assert(q.returnType==this.options.usizeType),x=this.elementsLookup.get("__gc_link"),assert(x.kind==y.FUNCTION_PROTOTYPE);var j=assert(this.resolver.resolveFunction(x,null));q=j.signature,assert(2==q.parameterTypes.length),assert(q.parameterTypes[0]==this.options.usizeType),assert(q.parameterTypes[1]==this.options.usizeType),assert(q.returnType==l.Type.void),x=this.elementsLookup.get("__gc_mark"),assert(x.kind==y.FUNCTION_PROTOTYPE);var Z=assert(this.resolver.resolveFunction(x,null));q=Z.signature,assert(1==q.parameterTypes.length),assert(q.parameterTypes[0]==this.options.usizeType),assert(q.returnType==l.Type.void),this.gcAllocateInstance=Q,this.gcLinkInstance=j,this.gcMarkInstance=Z;var J=2*e.usizeType.byteSize;this.gcHookOffset=J,this.gcHeaderSize=J+4+7&-8,this.hasGC=!0}},t.prototype.setConstantInteger=function(e,t,r){assert(t.is(4)),this.elementsLookup.set(e,new L(this,e,e,t,null,E.NONE).withConstantIntegerValue(r))},t.prototype.setConstantFloat=function(e,t,r){assert(t.is(8)),this.elementsLookup.set(e,new L(this,e,e,t,null,E.NONE).withConstantFloatValue(r))},t.prototype.tryLocateImport=function(e,t){for(var r,n=this.fileLevelExports;;){if(r=n.get(e))return r;var i=t.get(e);if(!i)break;if(!i.isReExport)return this.elementsLookup.get(i.externalName);e=i.externalName}return null},t.prototype.checkDecorators=function(e,t){for(var r=E.NONE,n=0,i=e.length;n<i;++n){var a=e[n],s=I(p.decoratorNameToKind(a.name));s&&(s==E.BUILTIN?a.range.source.isLibrary?r|=s:this.error(c.DiagnosticCode.Decorator_0_is_not_valid_here,a.range,a.name.range.toString()):t&s?r&s?this.error(c.DiagnosticCode.Duplicate_decorator,a.range,a.name.range.toString()):r|=s:this.error(c.DiagnosticCode.Decorator_0_is_not_valid_here,a.range,a.name.range.toString()))}return r},t.prototype.checkGlobal=function(e,t){var r=t.parent;if(e.hasDecorator(E.GLOBAL)||t.range.source.isLibrary&&e.is(o.CommonFlags.EXPORT)&&(assert(r).kind==p.NodeKind.SOURCE||r.kind==p.NodeKind.VARIABLE&&assert(r.parent).kind==p.NodeKind.SOURCE)){var n=t.programLevelInternalName;this.elementsLookup.has(n)?this.error(c.DiagnosticCode.Duplicate_identifier_0,t.name.range,e.internalName):this.elementsLookup.set(n,e)}e.hasDecorator(E.BUILTIN)&&(e.internalName=t.programLevelInternalName)},t.prototype.initializeClass=function(e,t,r,n){void 0===n&&(n=null);var i=e.fileLevelInternalName;if(this.elementsLookup.has(i))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,i);else{var a=e.decorators,s=e.name.text,l=new P(this,s,i,e,a?this.checkDecorators(a,E.GLOBAL|E.SEALED|E.UNMANAGED):E.NONE);l.parent=n,this.elementsLookup.set(i,l);var u=e.implementsTypes;if(u){var h=u.length;if(l.hasDecorator(E.UNMANAGED))h&&this.error(c.DiagnosticCode.Unmanaged_classes_cannot_implement_interfaces,p.Range.join(e.name.range,u[h-1].range));else if(h){for(var d=0;d<h;++d)this.warning(c.DiagnosticCode.Operation_not_supported,u[d].range);r.push(l)}}if(e.extendsType&&t.push(l),n){if(n.members){if(n.members.has(s))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,i)}else n.members=new Map;n.members.set(s,l),n.is(o.CommonFlags.MODULE_EXPORT)&&l.is(o.CommonFlags.EXPORT)&&l.set(o.CommonFlags.MODULE_EXPORT)}else if(l.is(o.CommonFlags.EXPORT)){if(this.fileLevelExports.has(i))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,i);if(this.fileLevelExports.set(i,l),this.currentFilespace.members.set(s,l),l.is(o.CommonFlags.EXPORT)&&e.range.source.isEntry){if(this.moduleLevelExports.has(s)){var _=this.moduleLevelExports.get(s);return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,_.element.internalName)}l.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(s,{element:l,identifier:e.name})}}for(var m=e.members,g=(d=0,m.length);d<g;++d){var y=m[d];switch(y.kind){case p.NodeKind.FIELDDECLARATION:this.initializeField(y,l);break;case p.NodeKind.METHODDECLARATION:y.isAny(o.CommonFlags.GET|o.CommonFlags.SET)?this.initializeAccessor(y,l):this.initializeMethod(y,l);break;default:return void assert(!1)}}this.checkGlobal(l,e)}},t.prototype.initializeField=function(e,t){var r=e.name.text,n=e.fileLevelInternalName,i=e.decorators,a=t.kind==y.INTERFACE_PROTOTYPE;if(e.is(o.CommonFlags.STATIC)){if(a&&assert(!1),this.elementsLookup.has(n))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n);if(t.members){if(t.members.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;var s=new L(this,r,n,l.Type.void,e,i?this.checkDecorators(i,E.INLINE):E.NONE);s.parent=t,t.members.set(r,s),this.elementsLookup.set(n,s),t.is(o.CommonFlags.MODULE_EXPORT)&&s.set(o.CommonFlags.MODULE_EXPORT),s.hasDecorator(E.INLINE)&&!s.is(o.CommonFlags.READONLY)&&this.error(c.DiagnosticCode.Decorator_0_is_not_valid_here,assert(p.findDecorator(p.DecoratorKind.INLINE,i)).range,"inline")}else{if(a&&assert(!e.isAny(o.CommonFlags.ABSTRACT|o.CommonFlags.GET|o.CommonFlags.SET)),t.instanceMembers){if(t.instanceMembers.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.instanceMembers=new Map;var u=new D(t,r,n,e);i&&this.checkDecorators(i,E.NONE),t.instanceMembers.set(r,u)}},t.prototype.initializeMethod=function(e,t){var r=e.name.text,n=e.fileLevelInternalName,i=null,a=e.decorators,s=E.NONE;if(a&&(s=this.checkDecorators(a,E.OPERATOR_BINARY|E.OPERATOR_PREFIX|E.OPERATOR_POSTFIX|E.INLINE)),e.is(o.CommonFlags.STATIC)){if(assert(e.name.kind!=p.NodeKind.CONSTRUCTOR),this.elementsLookup.has(n))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n);if(t.members){if(t.members.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;i=new R(this,r,n,e,t,s),t.members.set(r,i),this.elementsLookup.set(n,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)}else{if(t.instanceMembers){if(t.instanceMembers.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.instanceMembers=new Map;i=new R(this,r,n,e,t,s),e.name.kind==p.NodeKind.CONSTRUCTOR?t.constructorPrototype?this.error(c.DiagnosticCode.Multiple_constructor_implementations_are_not_allowed,e.name.range):(i.set(o.CommonFlags.CONSTRUCTOR),t.constructorPrototype=i):t.instanceMembers.set(r,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)}this.checkOperatorOverloads(e.decorators,i,t)},t.prototype.checkOperatorOverloads=function(e,t,r){if(e)for(var n=0,i=e.length;n<i;++n){var a=e[n];switch(a.decoratorKind){case p.DecoratorKind.OPERATOR:case p.DecoratorKind.OPERATOR_BINARY:case p.DecoratorKind.OPERATOR_PREFIX:case p.DecoratorKind.OPERATOR_POSTFIX:var o=a.arguments&&a.arguments.length||0;if(1==o){var l=a.arguments[0];if(l.kind==p.NodeKind.LITERAL&&l.literalKind==p.LiteralKind.STRING){var u=g(a.decoratorKind,l.value);if(u==s.INVALID)this.error(c.DiagnosticCode.Operation_not_supported,l.range);else{var h=r.overloadPrototypes;h.has(u)?this.error(c.DiagnosticCode.Duplicate_function_implementation,l.range):(t.operatorKind=u,h.set(u,t))}}else this.error(c.DiagnosticCode.String_literal_expected,l.range)}else this.error(c.DiagnosticCode.Expected_0_arguments_but_got_1,a.range,"1",o.toString(0))}}},t.prototype.initializeAccessor=function(e,t){var r=e.name.text,n=e.fileLevelInternalName,i=this.elementsLookup.get(n),a=e.is(o.CommonFlags.GET),s=!1;if(i){if(i.kind!=y.PROPERTY||null!=(a?i.getterPrototype:i.setterPrototype))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else i=new U(this,r,n,t),s=!0;var l=e.decorators,p=E.NONE;l&&(p=this.checkDecorators(l,E.INLINE));var u=(a?o.GETTER_PREFIX:o.SETTER_PREFIX)+r;if(e.is(o.CommonFlags.STATIC)){var h=t.internalName+o.STATIC_DELIMITER+u;if(this.elementsLookup.has(h))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,h);var d=new R(this,u,h,e,null,p);if(a?i.getterPrototype=d:i.setterPrototype=d,s){if(t.members){if(t.members.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,h)}else t.members=new Map;t.members.set(r,i)}else assert(t.members&&t.members.has(r));this.elementsLookup.set(n,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)}else{var _=t.internalName+o.INSTANCE_DELIMITER+u;if(t.instanceMembers){if(t.instanceMembers.has(u))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.instanceMembers=new Map;var m=new R(this,u,_,e,t,p);a?i.getterPrototype=m:i.setterPrototype=m,t.instanceMembers.set(u,i),this.elementsLookup.set(n,i),t.is(o.CommonFlags.MODULE_EXPORT)&&(i.set(o.CommonFlags.MODULE_EXPORT),m.set(o.CommonFlags.MODULE_EXPORT))}},t.prototype.initializeEnum=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.name.text,i=new N(this,n,r,e);if(i.parent=t,this.elementsLookup.set(r,i),t){if(t.members){if(t.members.has(n))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.is(o.CommonFlags.EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)}else if(i.is(o.CommonFlags.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,i),this.currentFilespace.members.set(n,i),e.range.source.isEntry){if(this.moduleLevelExports.has(n)){var a=this.moduleLevelExports.get(n);return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,a.element.internalName)}i.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(n,{element:i,identifier:e.name})}}for(var s=e.values,l=0,p=s.length;l<p;++l)this.initializeEnumValue(s[l],i);this.checkGlobal(i,e)}},t.prototype.initializeEnumValue=function(e,t){var r=e.name.text,n=e.fileLevelInternalName;if(t.members){if(t.members.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;var i=new O(t,this,r,n,e);t.members.set(r,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)},t.prototype.initializeExports=function(e,t){var r=e.members;if(r)for(var n=0,i=r.length;n<i;++n)this.initializeExport(r[n],e.internalPath,t);else this.error(c.DiagnosticCode.Operation_not_supported,e.range)},t.prototype.setExportAndCheckLibrary=function(e,t,r){this.fileLevelExports.set(e,t);var n=r.range.source.internalPath,i=o.FILESPACE_PREFIX+n,a=this.elementsLookup.get(i);a||(a=assert(this.elementsLookup.get(i+o.PATH_DELIMITER+"index"))),assert(a.kind==y.FILESPACE);var s=r.text;a.members.set(s,t);var l=r.range.source;l.isLibrary?this.elementsLookup.has(s)?this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,r.range,s):(t.internalName=s,this.elementsLookup.set(s,t)):l.isEntry&&this.moduleLevelExports.set(r.text,{element:t,identifier:r})},t.prototype.initializeExport=function(e,t,r){var n,i,a,s=e.range.source.internalPath+o.PATH_DELIMITER+e.externalName.text;if(this.fileLevelExports.has(s))this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,s);else if(null==t){if(n=e.range.source.internalPath+o.PATH_DELIMITER+e.name.text,this.elementsLookup.has(n))return void this.setExportAndCheckLibrary(s,this.elementsLookup.get(n),e.externalName);if(r.has(s))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,s);(a=new _).isReExport=!1,a.externalName=n,a.member=e,r.set(s,a)}else{if(n=t+o.PATH_DELIMITER+e.name.text,i=this.elementsLookup.get(n))return void this.setExportAndCheckLibrary(s,i,e.externalName);for(var l=new Set;a=r.get(n);){if(!a.isReExport){if(i=this.elementsLookup.get(a.externalName))return void this.setExportAndCheckLibrary(s,i,e.externalName);break}if(i=this.fileLevelExports.get(a.externalName))return void this.setExportAndCheckLibrary(s,i,e.externalName);if(n=a.externalName,l.has(a))break;l.add(a)}if(r.has(s))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,s);(a=new _).isReExport=!0,a.externalName=n,a.member=e,r.set(s,a)}},t.prototype.initializeFunction=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.name.text,i=e.decorators,a=new R(this,n,r,e,null,i?this.checkDecorators(i,E.GLOBAL|E.INLINE|E.EXTERNAL):E.NONE);if(a.parent=t,this.elementsLookup.set(r,a),t){if(t.members){if(t.members.has(n))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n,a),t.is(o.CommonFlags.MODULE_EXPORT)&&a.is(o.CommonFlags.EXPORT)&&(a.parent=t,a.set(o.CommonFlags.MODULE_EXPORT))}else if(a.is(o.CommonFlags.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,a),this.currentFilespace.members.set(n,a),e.range.source.isEntry){if(this.moduleLevelExports.has(n)){var s=this.moduleLevelExports.get(n);return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,s.element.internalName)}a.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(n,{element:a,identifier:e.name})}}this.checkGlobal(a,e)}},t.prototype.initializeImports=function(e,t,r){var n=e.declarations;if(n)for(var i=0,a=n.length;i<a;++i)this.initializeImport(n[i],e.internalPath,t,r);else if(e.namespaceName){var s=e.namespaceName.text,l=e.range.source.internalPath+o.PATH_DELIMITER+s;if(this.elementsLookup.has(l))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.namespaceName.range,l);var p=this.elementsLookup.get(e.internalPath);if(p)return void this.elementsLookup.set(l,p);var u=new d;u.localName=l;var h=o.FILESPACE_PREFIX+e.internalPath;u.externalName=h,u.externalNameAlt=h+o.PATH_DELIMITER+"index",u.declaration=null,r.push(u)}},t.prototype.initializeImport=function(e,t,r,n){var i=e.fileLevelInternalName;if(this.elementsLookup.has(i))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,i);else{var a,s=t+o.PATH_DELIMITER+e.externalName.text;if(a=this.fileLevelExports.get(s))this.elementsLookup.set(i,a);else{var l=o.PATH_DELIMITER+"index",p=new d;p.localName=i,t.endsWith(l)?(p.externalName=s,p.externalNameAlt=t.substring(0,t.length-l.length+1)+e.externalName.text):(p.externalName=s,p.externalNameAlt=t+l+o.PATH_DELIMITER+e.externalName.text),p.declaration=e,n.push(p)}}},t.prototype.initializeInterface=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.decorators,i=e.name.text,a=new M(this,i,r,e,n?this.checkDecorators(n,E.GLOBAL):E.NONE);if(a.parent=t,this.elementsLookup.set(r,a),t){if(t.members){if(t.members.has(a.internalName))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(a.internalName,a),t.is(o.CommonFlags.MODULE_EXPORT)&&a.is(o.CommonFlags.EXPORT)&&a.set(o.CommonFlags.MODULE_EXPORT)}else if(a.is(o.CommonFlags.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,a),this.currentFilespace.members.set(i,a),e.range.source.isEntry){if(this.moduleLevelExports.has(i)){var s=this.moduleLevelExports.get(i);return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,s.element.internalName)}a.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(i,{element:a,identifier:e.name})}}for(var l=e.members,u=0,h=l.length;u<h;++u){var d=l[u];switch(d.kind){case p.NodeKind.FIELDDECLARATION:this.initializeField(d,a);break;case p.NodeKind.METHODDECLARATION:d.isAny(o.CommonFlags.GET|o.CommonFlags.SET)?this.initializeAccessor(d,a):this.initializeMethod(d,a);break;default:throw new Error("interface member expected")}}this.checkGlobal(a,e)}},t.prototype.initializeNamespace=function(e,t,r,n){void 0===n&&(n=null);var i=e.fileLevelInternalName,a=e.name.text,s=this.elementsLookup.get(i);if(s||((s=new C(this,a,i,e)).parent=n,this.elementsLookup.set(i,s),this.checkGlobal(s,e)),n){if(n.members){if(n.members.has(a))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,i)}else n.members=new Map;n.members.set(a,s),n.is(o.CommonFlags.MODULE_EXPORT)&&s.is(o.CommonFlags.EXPORT)&&s.set(o.CommonFlags.MODULE_EXPORT)}else if(s.is(o.CommonFlags.EXPORT)){var l=this.fileLevelExports.get(i);if(l?(l.is(o.CommonFlags.EXPORT)||this.error(c.DiagnosticCode.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local,e.name.range,s.internalName),s=l):this.fileLevelExports.set(i,s),this.currentFilespace.members.set(a,s),e.range.source.isEntry){if(this.moduleLevelExports.has(a)){var u=this.moduleLevelExports.get(a);if(u.element!==s)return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,u.element.internalName)}else this.moduleLevelExports.set(a,{element:s,identifier:e.name});s.set(o.CommonFlags.MODULE_EXPORT)}}for(var h=e.members,d=0,_=h.length;d<_;++d)switch(h[d].kind){case p.NodeKind.CLASSDECLARATION:this.initializeClass(h[d],t,r,s);break;case p.NodeKind.ENUMDECLARATION:this.initializeEnum(h[d],s);break;case p.NodeKind.FUNCTIONDECLARATION:this.initializeFunction(h[d],s);break;case p.NodeKind.INTERFACEDECLARATION:this.initializeInterface(h[d],s);break;case p.NodeKind.NAMESPACEDECLARATION:this.initializeNamespace(h[d],t,r,s);break;case p.NodeKind.TYPEDECLARATION:this.error(c.DiagnosticCode.Operation_not_supported,h[d].range);break;case p.NodeKind.VARIABLE:this.initializeVariables(h[d],s);break;default:throw new Error("namespace member expected")}},t.prototype.initializeTypeAlias=function(e,t){void 0===t&&(t=null);var r=e.name.text;if(this.typesLookup.has(r)||this.typeAliases.has(r))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=new m;n.typeParameters=e.typeParameters,n.type=e.type,this.typeAliases.set(r,n)}},t.prototype.initializeVariables=function(e,t){void 0===t&&(t=null);for(var r=e.declarations,n=0,i=r.length;n<i;++n){var a=r[n],s=a.decorators,u=a.fileLevelInternalName;if(this.elementsLookup.has(u))this.error(c.DiagnosticCode.Duplicate_identifier_0,a.name.range,u);else{var h=a.name.text,d=new L(this,h,u,l.Type.void,a,s?this.checkDecorators(s,E.GLOBAL|E.INLINE|E.EXTERNAL):E.NONE);if(d.parent=t,this.elementsLookup.set(u,d),d.hasDecorator(E.INLINE)&&!d.is(o.CommonFlags.CONST)&&this.error(c.DiagnosticCode.Decorator_0_is_not_valid_here,assert(p.findDecorator(p.DecoratorKind.INLINE,s)).range,"inline"),t){if(t.members){if(t.members.has(h)){this.error(c.DiagnosticCode.Duplicate_identifier_0,a.name.range,u);continue}}else t.members=new Map;t.members.set(h,d),t.is(o.CommonFlags.MODULE_EXPORT)&&d.is(o.CommonFlags.EXPORT)&&d.set(o.CommonFlags.MODULE_EXPORT)}else if(d.is(o.CommonFlags.EXPORT)&&(this.fileLevelExports.has(u)?this.error(c.DiagnosticCode.Duplicate_identifier_0,a.name.range,u):this.fileLevelExports.set(u,d),this.currentFilespace.members.set(h,d),a.range.source.isEntry)){if(this.moduleLevelExports.has(h)){var _=this.moduleLevelExports.get(h);this.error(c.DiagnosticCode.Duplicate_identifier_0,a.name.range,_.element.internalName);continue}d.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(h,{element:d,identifier:a.name})}this.checkGlobal(d,a)}}},t}(c.DiagnosticEmitter);function I(e){switch(e){case p.DecoratorKind.GLOBAL:return E.GLOBAL;case p.DecoratorKind.OPERATOR:case p.DecoratorKind.OPERATOR_BINARY:return E.OPERATOR_BINARY;case p.DecoratorKind.OPERATOR_PREFIX:return E.OPERATOR_PREFIX;case p.DecoratorKind.OPERATOR_POSTFIX:return E.OPERATOR_POSTFIX;case p.DecoratorKind.UNMANAGED:return E.UNMANAGED;case p.DecoratorKind.SEALED:return E.SEALED;case p.DecoratorKind.INLINE:return E.INLINE;case p.DecoratorKind.EXTERNAL:return E.EXTERNAL;case p.DecoratorKind.BUILTIN:return E.BUILTIN;default:return E.NONE}}t.Program=T,function(e){e[e.GLOBAL=0]="GLOBAL",e[e.LOCAL=1]="LOCAL",e[e.ENUM=2]="ENUM",e[e.ENUMVALUE=3]="ENUMVALUE",e[e.FUNCTION_PROTOTYPE=4]="FUNCTION_PROTOTYPE",e[e.FUNCTION=5]="FUNCTION",e[e.FUNCTION_TARGET=6]="FUNCTION_TARGET",e[e.CLASS_PROTOTYPE=7]="CLASS_PROTOTYPE",e[e.CLASS=8]="CLASS",e[e.INTERFACE_PROTOTYPE=9]="INTERFACE_PROTOTYPE",e[e.INTERFACE=10]="INTERFACE",e[e.FIELD_PROTOTYPE=11]="FIELD_PROTOTYPE",e[e.FIELD=12]="FIELD",e[e.PROPERTY=13]="PROPERTY",e[e.NAMESPACE=14]="NAMESPACE",e[e.FILESPACE=15]="FILESPACE"}(y=t.ElementKind||(t.ElementKind={})),function(e){e[e.NONE=0]="NONE",e[e.GLOBAL=1]="GLOBAL",e[e.OPERATOR_BINARY=2]="OPERATOR_BINARY",e[e.OPERATOR_PREFIX=4]="OPERATOR_PREFIX",e[e.OPERATOR_POSTFIX=8]="OPERATOR_POSTFIX",e[e.UNMANAGED=16]="UNMANAGED",e[e.SEALED=32]="SEALED",e[e.INLINE=64]="INLINE",e[e.EXTERNAL=128]="EXTERNAL",e[e.BUILTIN=256]="BUILTIN"}(E=t.DecoratorFlags||(t.DecoratorFlags={})),t.decoratorKindToFlag=I;var v=function(){function e(e,t,r){this.flags=o.CommonFlags.NONE,this.decoratorFlags=E.NONE,this.members=null,this.parent=null,this.program=e,this.simpleName=t,this.internalName=r}return e.prototype.is=function(e){return(this.flags&e)==e},e.prototype.isAny=function(e){return 0!=(this.flags&e)},e.prototype.set=function(e){this.flags|=e},e.prototype.hasDecorator=function(e){return(this.decoratorFlags&e)==e},e}();t.Element=v;var A=function(e){function t(t,r){var n=e.call(this,t,r.internalPath,o.FILESPACE_PREFIX+r.internalPath)||this;return n.kind=y.FILESPACE,n.members=new Map,n}return n(t,e),t}(v);t.Filespace=A;var C=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=y.NAMESPACE,a.declaration=i,a.flags=i.flags,a}return n(t,e),t}(v);t.Namespace=C;var N=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=y.ENUM,a.declaration=i,a.flags=i.flags,a}return n(t,e),t}(v);t.Enum=N;var O=function(e){function t(t,r,n,i,a){var s=e.call(this,r,n,i)||this;return s.kind=y.ENUMVALUE,s.constantValue=0,s.parent=t,s.declaration=a,s}return n(t,e),t}(v);t.EnumValue=O,function(e){e[e.NONE=0]="NONE",e[e.INTEGER=1]="INTEGER",e[e.FLOAT=2]="FLOAT"}(t.ConstantValueKind||(t.ConstantValueKind={}));var S=function(e){function t(t,r,n,i,a){var s=e.call(this,t,r,n)||this;return s.constantValueKind=0,s.type=i,s.declaration=a,s}return n(t,e),t.prototype.withConstantIntegerValue=function(e){return this.constantValueKind=1,this.constantIntegerValue=e,this.set(o.CommonFlags.CONST|o.CommonFlags.INLINED),this},t.prototype.withConstantFloatValue=function(e){return this.constantValueKind=2,this.constantFloatValue=e,this.set(o.CommonFlags.CONST|o.CommonFlags.INLINED),this},t}(v);t.VariableLikeElement=S;var L=function(e){function t(t,r,n,i,a,s){var c=e.call(this,t,r,n,i,a)||this;return c.kind=y.GLOBAL,c.flags=a?a.flags:o.CommonFlags.NONE,c.decoratorFlags=s,c.type=i,c}return n(t,e),t}(S);t.Global=L;var b=function(){return function(e,t,r){void 0===r&&(r=null),this.name=e,this.type=t,this.initializer=r}}();t.Parameter=b;var k=function(e){function t(t,r,n,i,a){void 0===a&&(a=null);var s=e.call(this,t,r,r,i,a)||this;return s.kind=y.LOCAL,s.scopedGlobal=null,s.index=n,s}return n(t,e),t}(S);t.Local=k;var R=function(e){function t(t,r,n,i,a,o){void 0===a&&(a=null),void 0===o&&(o=E.NONE);var c=e.call(this,t,r,n)||this;return c.kind=y.FUNCTION_PROTOTYPE,c.instances=new Map,c.classTypeArguments=null,c.operatorKind=s.INVALID,c.declaration=i,c.flags=i.flags,c.classPrototype=a,c.decoratorFlags=o,c}return n(t,e),t.prototype.toString=function(){return this.simpleName},t}(v);t.FunctionPrototype=R;var x=function(e){function t(t,r,n,s,c){var l,p;void 0===s&&(s=null),void 0===c&&(c=null);var u=e.call(this,t.program,t.simpleName,r)||this;if(u.kind=y.FUNCTION,u.localsByName=new Map,u.localsByIndex=[],u.additionalLocals=[],u.breakContext=null,u.debugLocations=[],u.ref=0,u.functionTableIndex=-1,u.trampoline=null,u.outerScope=null,u.nextBreakId=0,u.breakStack=null,u.nextInlineId=0,u.tempI32s=null,u.tempI64s=null,u.tempF32s=null,u.tempF64s=null,u.prototype=t,u.signature=n,u.parent=s,u.flags=t.flags,u.decoratorFlags=t.decoratorFlags,u.contextualTypeArguments=c,!t.is(o.CommonFlags.AMBIENT)){var h=0;if(s&&s.kind==y.CLASS){assert(u.is(o.CommonFlags.INSTANCE));var d=new k(t.program,"this",h++,assert(n.thisType));u.localsByName.set("this",d),u.localsByIndex[d.index]=d;var _=s.contextualTypeArguments;if(_){u.contextualTypeArguments||(u.contextualTypeArguments=new Map);try{for(var m=i(_),g=m.next();!g.done;g=m.next()){var E=a(g.value,2),f=E[0],T=E[1];u.contextualTypeArguments.has(f)||u.contextualTypeArguments.set(f,T)}}catch(e){l={error:e}}finally{try{g&&!g.done&&(p=m.return)&&p.call(m)}finally{if(l)throw l.error}}}}else assert(!u.is(o.CommonFlags.INSTANCE));for(var I=n.parameterTypes,v=0,A=I.length;v<A;++v){var C=I[v],N=n.getParameterName(v);d=new k(t.program,N,h++,C);u.localsByName.set(N,d),u.localsByIndex[d.index]=d}}return u.flow=K.create(u),u}return n(t,e),t.prototype.addLocal=function(e,t,r){void 0===t&&(t=null),void 0===r&&(r=null);var n=this.signature.parameterTypes.length+this.additionalLocals.length;this.is(o.CommonFlags.INSTANCE)&&++n;var i=new k(this.prototype.program,t||"var$"+n.toString(10),n,e,r);if(t){if(this.localsByName.has(t))throw new Error("duplicate local name");this.localsByName.set(t,i)}return this.localsByIndex[i.index]=i,this.additionalLocals.push(e),i},t.prototype.getTempLocal=function(e,t){var r,n;switch(void 0===t&&(t=!1),e.toNativeType()){case 1:r=this.tempI32s;break;case 2:r=this.tempI64s;break;case 3:r=this.tempF32s;break;case 4:r=this.tempF64s;break;default:throw new Error("concrete type expected")}return r&&r.length?((n=r.pop()).type=e,n.flags=o.CommonFlags.NONE):n=this.addLocal(e),e.is(36)&&this.flow.setLocalWrapped(n.index,t),n},t.prototype.freeTempLocal=function(e){if(!e.is(o.CommonFlags.INLINED)){var t;switch(assert(e.index>=0),assert(null!=e.type),e.type.toNativeType()){case 1:t=this.tempI32s||(this.tempI32s=[]);break;case 2:t=this.tempI64s||(this.tempI64s=[]);break;case 3:t=this.tempF32s||(this.tempF32s=[]);break;case 4:t=this.tempF64s||(this.tempF64s=[]);break;default:throw new Error("concrete type expected")}assert(e.index>=0),t.push(e)}},t.prototype.getAndFreeTempLocal=function(e,t){var r,n;switch(e.toNativeType()){case 1:r=this.tempI32s||(this.tempI32s=[]);break;case 2:r=this.tempI64s||(this.tempI64s=[]);break;case 3:r=this.tempF32s||(this.tempF32s=[]);break;case 4:r=this.tempF64s||(this.tempF64s=[]);break;default:throw new Error("concrete type expected")}return r.length?(n=r[r.length-1]).type=e:(n=this.addLocal(e),r.push(n)),e.is(36)&&this.flow.setLocalWrapped(n.index,t),n},t.prototype.enterBreakContext=function(){var e=this.nextBreakId++;return this.breakStack?this.breakStack.push(e):this.breakStack=[e],this.breakContext=e.toString(10)},t.prototype.leaveBreakContext=function(){assert(null!=this.breakStack);var e=this.breakStack.length;assert(e>0),this.breakStack.pop(),e>1?this.breakContext=this.breakStack[e-2].toString(10):(this.breakContext=null,this.breakStack=null)},t.prototype.finalize=function(e,t){if(this.ref=t,assert(!this.breakStack||!this.breakStack.length),this.breakStack=null,this.breakContext=null,this.tempI32s=this.tempI64s=this.tempF32s=this.tempF64s=null,this.program.options.sourceMap)for(var r=this.debugLocations,n=0,i=r.length;n<i;++n){var a=r[n];e.setDebugLocation(t,a.debugInfoRef,a.source.debugInfoIndex,a.line,a.column)}},t.prototype.toString=function(){return this.prototype.simpleName},t}(v);t.Function=x;var F=function(e){function t(t,r){var n=e.call(this,t,"","")||this;n.kind=y.FUNCTION_TARGET;var i=r.toSignatureString();return n.simpleName=i,n.internalName=i,n.signature=r,n.type=l.Type.u32.asFunction(r),n}return n(t,e),t}(v);t.FunctionTarget=F;var D=function(e){function t(t,r,n,i){var a=e.call(this,t.program,r,n)||this;return a.kind=y.FIELD_PROTOTYPE,a.classPrototype=t,a.declaration=i,a.flags=i.flags,a}return n(t,e),t}(v);t.FieldPrototype=D;var B=function(e){function t(t,r,n,i,a){var s=e.call(this,t.program,t.simpleName,r,n,i)||this;return s.kind=y.FIELD,s.memoryOffset=-1,s.prototype=t,s.flags=t.flags,s.type=n,s.parent=a,s}return n(t,e),t}(S);t.Field=B;var U=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=y.PROPERTY,a.getterPrototype=null,a.setterPrototype=null,a.parent=i,a}return n(t,e),t}(v);t.Property=U;var P=function(e){function t(t,r,n,i,a){var s=e.call(this,t,r,n)||this;return s.kind=y.CLASS_PROTOTYPE,s.instances=new Map,s.instanceMembers=null,s.basePrototype=null,s.constructorPrototype=null,s.overloadPrototypes=new Map,s.declaration=i,s.flags=i.flags,s.decoratorFlags=a,s}return n(t,e),t.prototype.toString=function(){return this.simpleName},t}(v);t.ClassPrototype=P;var w=function(e){function t(t,r,n,s,o){var c,l;void 0===s&&(s=null),void 0===o&&(o=null);var p=e.call(this,t.program,r,n)||this;if(p.kind=y.CLASS,p.contextualTypeArguments=null,p.currentMemoryOffset=0,p.constructorInstance=null,p.overloads=null,p.gcHookIndex=-1,p.prototype=t,p.flags=t.flags,p.decoratorFlags=t.decoratorFlags,p.typeArguments=s,p.type=t.program.options.usizeType.asClass(p),p.base=o,o){var u=o.contextualTypeArguments;if(u){p.contextualTypeArguments||(p.contextualTypeArguments=new Map);try{for(var h=i(u),d=h.next();!d.done;d=h.next()){var _=a(d.value,2),m=_[0],g=_[1];p.contextualTypeArguments.set(m,g)}}catch(e){c={error:e}}finally{try{d&&!d.done&&(l=h.return)&&l.call(h)}finally{if(c)throw c.error}}}}var E,f,T=p.prototype.declaration;if(T){var I=T.typeParameters;if(s){if((f=s.length)!=I.length)throw new Error("type argument count mismatch");if(f)for(p.contextualTypeArguments||(p.contextualTypeArguments=new Map),E=0;E<f;++E)p.contextualTypeArguments.set(I[E].name.text,s[E])}else if(I.length)throw new Error("type argument count mismatch")}return p}return n(t,e),t.prototype.isAssignableTo=function(e){var t=this;do{if(t==e)return!0}while(t=t.base);return!1},t.prototype.lookupOverload=function(e,t){if(void 0===t&&(t=!1),t)switch(e){case s.INDEXED_GET:if(r=this.lookupOverload(s.UNCHECKED_INDEXED_GET))return r;break;case s.INDEXED_SET:var r;if(r=this.lookupOverload(s.UNCHECKED_INDEXED_SET))return r;break;default:assert(!1)}var n=this;do{var i=n.overloads;if(i){var a=i.get(e);if(a)return a}}while(n=n.base);return null},t.prototype.offsetof=function(e){var t=assert(this.members);assert(t.has(e));var r=t.get(e);return assert(r.kind==y.FIELD),r.memoryOffset},t.prototype.toString=function(){return this.simpleName},t}(v);t.Class=w;var M=function(e){function t(t,r,n,i,a){var s=e.call(this,t,r,n,i,a)||this;return s.kind=y.INTERFACE_PROTOTYPE,s}return n(t,e),t}(P);t.InterfacePrototype=M;var G=function(e){function t(t,r,n,i,a){void 0===i&&(i=[]),void 0===a&&(a=null);var s=e.call(this,t,r,n,i,a)||this;return s.kind=y.INTERFACE,s}return n(t,e),t}(w);t.Interface=G,function(e){e[e.NONE=0]="NONE",e[e.RETURNS=1]="RETURNS",e[e.RETURNS_WRAPPED=2]="RETURNS_WRAPPED",e[e.THROWS=4]="THROWS",e[e.BREAKS=8]="BREAKS",e[e.CONTINUES=16]="CONTINUES",e[e.ALLOCATES=32]="ALLOCATES",e[e.CONDITIONALLY_RETURNS=64]="CONDITIONALLY_RETURNS",e[e.CONDITIONALLY_THROWS=128]="CONDITIONALLY_THROWS",e[e.CONDITIONALLY_BREAKS=256]="CONDITIONALLY_BREAKS",e[e.CONDITIONALLY_CONTINUES=512]="CONDITIONALLY_CONTINUES",e[e.CONDITIONALLY_ALLOCATES=1024]="CONDITIONALLY_ALLOCATES",e[e.INLINE_CONTEXT=2048]="INLINE_CONTEXT",e[e.UNCHECKED_CONTEXT=4096]="UNCHECKED_CONTEXT",e[e.ANY_TERMINATING=29]="ANY_TERMINATING",e[e.ANY_CATEGORICAL=63]="ANY_CATEGORICAL",e[e.ANY_CONDITIONAL=1984]="ANY_CONDITIONAL"}(t.FlowFlags||(t.FlowFlags={}));var K=function(){function e(){this.scopedLocals=null}return e.create=function(t){var r=new e;return r.parent=null,r.flags=0,r.currentFunction=t,r.continueLabel=null,r.breakLabel=null,r.returnLabel=null,r.returnType=t.signature.returnType,r.contextualTypeArguments=t.contextualTypeArguments,r.wrappedLocals=i64_new(0),r.wrappedLocalsExt=null,r},e.prototype.is=function(e){return(this.flags&e)==e},e.prototype.isAny=function(e){return 0!=(this.flags&e)},e.prototype.set=function(e){this.flags|=e},e.prototype.unset=function(e){this.flags&=~e},e.prototype.fork=function(){var t=new e;return t.parent=this,t.flags=this.flags,t.currentFunction=this.currentFunction,t.continueLabel=this.continueLabel,t.breakLabel=this.breakLabel,t.returnLabel=this.returnLabel,t.returnType=this.returnType,t.contextualTypeArguments=this.contextualTypeArguments,t.wrappedLocals=this.wrappedLocals,t.wrappedLocalsExt=this.wrappedLocalsExt?this.wrappedLocalsExt.slice():null,t},e.prototype.free=function(){var e,t,r=assert(this.parent);if(this.scopedLocals){try{for(var n=i(this.scopedLocals.values()),a=n.next();!a.done;a=n.next()){var s=a.value;s.is(o.CommonFlags.SCOPED)&&this.currentFunction.freeTempLocal(s)}}catch(t){e={error:t}}finally{try{a&&!a.done&&(t=n.return)&&t.call(n)}finally{if(e)throw e.error}}this.scopedLocals=null}return r},e.prototype.addScopedLocal=function(e,t,r,n){var i=this.currentFunction.getTempLocal(e,!1);if(this.scopedLocals){var a=this.scopedLocals.get(t);if(a)return n?this.currentFunction.program.error(c.DiagnosticCode.Duplicate_identifier_0,n.name.range):assert(!1),a}else this.scopedLocals=new Map;return i.set(o.CommonFlags.SCOPED),this.scopedLocals.set(t,i),e.is(36)&&this.setLocalWrapped(i.index,r),i},e.prototype.addScopedLocalAlias=function(e,t,r){if(this.scopedLocals){var n=this.scopedLocals.get(r);if(n){var i=n.declaration;return i?this.currentFunction.program.error(c.DiagnosticCode.Duplicate_identifier_0,i.name.range):assert(!1),n}}else this.scopedLocals=new Map;assert(e<this.currentFunction.localsByIndex.length);var a=new k(this.currentFunction.program,r,e,t,null);return this.scopedLocals.set(r,a),a},e.prototype.getScopedLocal=function(e){var t,r=this;do{if(r.scopedLocals&&(t=r.scopedLocals.get(e)))return t}while(r=r.parent);return this.currentFunction.localsByName.get(e)},e.prototype.isLocalWrapped=function(e){var t,r;if(e<64){if(e<0)return!0;t=this.wrappedLocals}else{if(!(r=this.wrappedLocalsExt))return!1;var n=(e-64)/64|0;if(n>=r.length)return!1;t=r[n],e-=64*(n+1)}return i64_ne(i64_and(t,i64_shl(i64_one,i64_new(e))),i64_zero)},e.prototype.setLocalWrapped=function(e,t){var r,n=-1;if(e<64){if(e<0)return;r=this.wrappedLocals}else{var i=this.wrappedLocalsExt;for(n=(e-64)/64|0,i||(this.wrappedLocalsExt=i=new Array(n+1),i.length=0);i.length<=n;)i.push(i64_new(0));r=i[n],e-=64*(n+1)}r=t?i64_or(r,i64_shl(i64_one,i64_new(e))):i64_and(r,i64_not(i64_shl(i64_one,i64_new(e)))),n>=0?this.wrappedLocalsExt[n]=r:this.wrappedLocals=r},e.prototype.inherit=function(e){this.flags|=2047&e.flags,this.wrappedLocals=e.wrappedLocals,this.wrappedLocalsExt=e.wrappedLocalsExt},e.prototype.inheritConditional=function(e){e.is(1)&&this.set(64),e.is(4)&&this.set(128),e.is(8)&&e.breakLabel==this.breakLabel&&this.set(256),e.is(16)&&e.continueLabel==this.continueLabel&&this.set(512),e.is(32)&&this.set(1024)},e.prototype.inheritMutual=function(e,t){this.flags|=e.flags&t.flags&63,this.flags|=1984&e.flags,this.flags|=1984&t.flags,this.wrappedLocals=i64_and(e.wrappedLocals,t.wrappedLocals);var r=e.wrappedLocalsExt,n=t.wrappedLocalsExt;if(null!=r&&null!=n){var i=this.wrappedLocalsExt,a=min(r.length,n.length);if(a){if(i)for(;i.length<a;)i.push(i64_new(0));else i=new Array(a);for(var s=0;s<a;++s)i[s]=i64_and(r[s],n[s])}}},e.prototype.canOverflow=function(e,t){if(assert(t!=l.Type.void),!t.is(36))return!1;var r;switch(u.getExpressionId(e)){case u.ExpressionId.GetLocal:var n=this.currentFunction,i=n.localsByIndex[u.getGetLocalIndex(e)];return!n.flow.isLocalWrapped(i.index)||z(i.type,t);case u.ExpressionId.SetLocal:return assert(u.isTeeLocal(e)),this.canOverflow(u.getSetLocalValue(e),t);case u.ExpressionId.GetGlobal:return!1;case u.ExpressionId.Binary:switch(u.getBinaryOp(e)){case u.BinaryOp.EqI32:case u.BinaryOp.EqI64:case u.BinaryOp.EqF32:case u.BinaryOp.EqF64:case u.BinaryOp.NeI32:case u.BinaryOp.NeI64:case u.BinaryOp.NeF32:case u.BinaryOp.NeF64:case u.BinaryOp.LtI32:case u.BinaryOp.LtU32:case u.BinaryOp.LtI64:case u.BinaryOp.LtU64:case u.BinaryOp.LtF32:case u.BinaryOp.LtF64:case u.BinaryOp.LeI32:case u.BinaryOp.LeU32:case u.BinaryOp.LeI64:case u.BinaryOp.LeU64:case u.BinaryOp.LeF32:case u.BinaryOp.LeF64:case u.BinaryOp.GtI32:case u.BinaryOp.GtU32:case u.BinaryOp.GtI64:case u.BinaryOp.GtU64:case u.BinaryOp.GtF32:case u.BinaryOp.GtF64:case u.BinaryOp.GeI32:case u.BinaryOp.GeU32:case u.BinaryOp.GeI64:case u.BinaryOp.GeU64:case u.BinaryOp.GeF32:case u.BinaryOp.GeF64:return!1;case u.BinaryOp.MulI32:return!(u.getExpressionId(r=u.getBinaryLeft(e))==u.ExpressionId.Const&&(0==u.getConstValueI32(r)||1==u.getConstValueI32(r)&&!this.canOverflow(u.getBinaryRight(e),t))||u.getExpressionId(r=u.getBinaryRight(e))==u.ExpressionId.Const&&(0==u.getConstValueI32(r)||1==u.getConstValueI32(r)&&!this.canOverflow(u.getBinaryLeft(e),t)));case u.BinaryOp.AndI32:return!(u.getExpressionId(r=u.getBinaryLeft(e))==u.ExpressionId.Const&&u.getConstValueI32(r)<=t.computeSmallIntegerMask(l.Type.i32)||!this.canOverflow(r,t)||u.getExpressionId(r=u.getBinaryRight(e))==u.ExpressionId.Const&&u.getConstValueI32(r)<=t.computeSmallIntegerMask(l.Type.i32)||!this.canOverflow(r,t));case u.BinaryOp.ShlI32:var a=32-t.size;return u.getExpressionId(r=u.getBinaryRight(e))!=u.ExpressionId.Const||u.getConstValueI32(r)<a;case u.BinaryOp.ShrI32:a=32-t.size;return this.canOverflow(u.getBinaryLeft(e),t)&&(u.getExpressionId(r=u.getBinaryRight(e))!=u.ExpressionId.Const||u.getConstValueI32(r)<a);case u.BinaryOp.ShrU32:a=32-t.size;return t.is(1)?!(u.getExpressionId(r=u.getBinaryRight(e))==u.ExpressionId.Const&&u.getConstValueI32(r)>a):this.canOverflow(u.getBinaryLeft(e),t)&&!(u.getExpressionId(r=u.getBinaryRight(e))==u.ExpressionId.Const&&u.getConstValueI32(r)>=a);case u.BinaryOp.DivU32:case u.BinaryOp.RemI32:case u.BinaryOp.RemU32:return this.canOverflow(u.getBinaryLeft(e),t)||this.canOverflow(u.getBinaryRight(e),t)}break;case u.ExpressionId.Unary:switch(u.getUnaryOp(e)){case u.UnaryOp.EqzI32:case u.UnaryOp.EqzI64:return!1;case u.UnaryOp.ClzI32:case u.UnaryOp.CtzI32:case u.UnaryOp.PopcntI32:return t.size<7}break;case u.ExpressionId.Const:var s=0;switch(u.getExpressionType(e)){case 1:s=u.getConstValueI32(e);break;case 2:s=u.getConstValueI64Low(e);break;case 3:s=i32(u.getConstValueF32(e));break;case 4:s=i32(u.getConstValueF64(e));break;default:assert(!1)}switch(t.kind){case 0:return s<i8.MIN_VALUE||s>i8.MAX_VALUE;case 1:return s<i16.MIN_VALUE||s>i16.MAX_VALUE;case 5:return s<0||s>u8.MAX_VALUE;case 6:return s<0||s>u16.MAX_VALUE;case 10:return 0!=(-2&s)}break;case u.ExpressionId.Load:var o=void 0;switch(u.getLoadBytes(e)){case 1:o=u.isLoadSigned(e)?l.Type.i8:l.Type.u8;break;case 2:o=u.isLoadSigned(e)?l.Type.i16:l.Type.u16;break;default:o=u.isLoadSigned(e)?l.Type.i32:l.Type.u32}return z(o,t);case u.ExpressionId.Block:if(!u.getBlockName(e)){var c=assert(u.getBlockChildCount(e)),p=u.getBlockChild(e,c-1);return this.canOverflow(p,t)}break;case u.ExpressionId.If:return this.canOverflow(u.getIfTrue(e),t)||this.canOverflow(assert(u.getIfFalse(e)),t);case u.ExpressionId.Select:return this.canOverflow(u.getSelectThen(e),t)||this.canOverflow(u.getSelectElse(e),t);case u.ExpressionId.Call:var h=this.currentFunction.program,d=assert(h.instancesLookup.get(assert(u.getCallTarget(e))));assert(d.kind==y.FUNCTION);var _=d.signature.returnType;return!d.flow.is(2)||z(_,t);case u.ExpressionId.Unreachable:return!1}return!0},e.prototype.finalize=function(){assert(null==this.parent),this.continueLabel=null,this.breakLabel=null,this.returnLabel=null,this.contextualTypeArguments=null},e}();function z(e,t){var r=e.byteSize,n=t.byteSize;return!e.is(4)||r>n||e.is(1)!=t.is(1)}t.Flow=K},function(e,t,r){"use strict";Object.defineProperty(t,"__esModule",{value:!0});var 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32",e[e.RotlI32=_BinaryenRotLInt32()]="RotlI32",e[e.RotrI32=_BinaryenRotRInt32()]="RotrI32",e[e.EqI32=_BinaryenEqInt32()]="EqI32",e[e.NeI32=_BinaryenNeInt32()]="NeI32",e[e.LtI32=_BinaryenLtSInt32()]="LtI32",e[e.LtU32=_BinaryenLtUInt32()]="LtU32",e[e.LeI32=_BinaryenLeSInt32()]="LeI32",e[e.LeU32=_BinaryenLeUInt32()]="LeU32",e[e.GtI32=_BinaryenGtSInt32()]="GtI32",e[e.GtU32=_BinaryenGtUInt32()]="GtU32",e[e.GeI32=_BinaryenGeSInt32()]="GeI32",e[e.GeU32=_BinaryenGeUInt32()]="GeU32",e[e.AddI64=_BinaryenAddInt64()]="AddI64",e[e.SubI64=_BinaryenSubInt64()]="SubI64",e[e.MulI64=_BinaryenMulInt64()]="MulI64",e[e.DivI64=_BinaryenDivSInt64()]="DivI64",e[e.DivU64=_BinaryenDivUInt64()]="DivU64",e[e.RemI64=_BinaryenRemSInt64()]="RemI64",e[e.RemU64=_BinaryenRemUInt64()]="RemU64",e[e.AndI64=_BinaryenAndInt64()]="AndI64",e[e.OrI64=_BinaryenOrInt64()]="OrI64",e[e.XorI64=_BinaryenXorInt64()]="XorI64",e[e.ShlI64=_BinaryenShlInt64()]="ShlI64",e[e.ShrU64=_BinaryenShrUInt64()]="ShrU64",e[e.ShrI64=_BinaryenShrSInt64()]="ShrI64",e[e.RotlI64=_BinaryenRotLInt64()]="RotlI64",e[e.RotrI64=_BinaryenRotRInt64()]="RotrI64",e[e.EqI64=_BinaryenEqInt64()]="EqI64",e[e.NeI64=_BinaryenNeInt64()]="NeI64",e[e.LtI64=_BinaryenLtSInt64()]="LtI64",e[e.LtU64=_BinaryenLtUInt64()]="LtU64",e[e.LeI64=_BinaryenLeSInt64()]="LeI64",e[e.LeU64=_BinaryenLeUInt64()]="LeU64",e[e.GtI64=_BinaryenGtSInt64()]="GtI64",e[e.GtU64=_BinaryenGtUInt64()]="GtU64",e[e.GeI64=_BinaryenGeSInt64()]="GeI64",e[e.GeU64=_BinaryenGeUInt64()]="GeU64",e[e.AddF32=_BinaryenAddFloat32()]="AddF32",e[e.SubF32=_BinaryenSubFloat32()]="SubF32",e[e.MulF32=_BinaryenMulFloat32()]="MulF32",e[e.DivF32=_BinaryenDivFloat32()]="DivF32",e[e.CopysignF32=_BinaryenCopySignFloat32()]="CopysignF32",e[e.MinF32=_BinaryenMinFloat32()]="MinF32",e[e.MaxF32=_BinaryenMaxFloat32()]="MaxF32",e[e.EqF32=_BinaryenEqFloat32()]="EqF32",e[e.NeF32=_BinaryenNeFloat32()]="NeF32",e[e.LtF32=_BinaryenLtFloat32()]="LtF32",e[e.LeF32=_BinaryenLeFloat32()]="LeF32",e[e.GtF32=_BinaryenGtFloat32()]="GtF32",e[e.GeF32=_BinaryenGeFloat32()]="GeF32",e[e.AddF64=_BinaryenAddFloat64()]="AddF64",e[e.SubF64=_BinaryenSubFloat64()]="SubF64",e[e.MulF64=_BinaryenMulFloat64()]="MulF64",e[e.DivF64=_BinaryenDivFloat64()]="DivF64",e[e.CopysignF64=_BinaryenCopySignFloat64()]="CopysignF64",e[e.MinF64=_BinaryenMinFloat64()]="MinF64",e[e.MaxF64=_BinaryenMaxFloat64()]="MaxF64",e[e.EqF64=_BinaryenEqFloat64()]="EqF64",e[e.NeF64=_BinaryenNeFloat64()]="NeF64",e[e.LtF64=_BinaryenLtFloat64()]="LtF64",e[e.LeF64=_BinaryenLeFloat64()]="LeF64",e[e.GtF64=_BinaryenGtFloat64()]="GtF64",e[e.GeF64=_BinaryenGeFloat64()]="GeF64"}(t.BinaryOp||(t.BinaryOp={})),function(e){e[e.PageSize=_BinaryenPageSize()]="PageSize",e[e.CurrentMemory=_BinaryenCurrentMemory()]="CurrentMemory",e[e.GrowMemory=_BinaryenGrowMemory()]="GrowMemory",e[e.HasFeature=_BinaryenHasFeature()]="HasFeature"}(t.HostOp||(t.HostOp={})),function(e){e[e.Add=_BinaryenAtomicRMWAdd()]="Add",e[e.Sub=_BinaryenAtomicRMWSub()]="Sub",e[e.And=_BinaryenAtomicRMWAnd()]="And",e[e.Or=_BinaryenAtomicRMWOr()]="Or",e[e.Xor=_BinaryenAtomicRMWXor()]="Xor",e[e.Xchg=_BinaryenAtomicRMWXchg()]="Xchg"}(t.AtomicRMWOp||(t.AtomicRMWOp={}));var 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e=assert(this.cachedTemporaryName);_BinaryenRemoveFunction(this.ref,e),_BinaryenRemoveFunctionType(this.ref,e)},e.prototype.addFunctionExport=function(e,t){var r=u(e),n=u(t);try{return _BinaryenAddFunctionExport(this.ref,r,n)}finally{memory.free(n),memory.free(r)}},e.prototype.addTableExport=function(e,t){var r=u(e),n=u(t);try{return _BinaryenAddTableExport(this.ref,r,n)}finally{memory.free(n),memory.free(r)}},e.prototype.addMemoryExport=function(e,t){var r=u(e),n=u(t);try{return _BinaryenAddMemoryExport(this.ref,r,n)}finally{memory.free(n),memory.free(r)}},e.prototype.addGlobalExport=function(e,t){var r=u(e),n=u(t);try{return _BinaryenAddGlobalExport(this.ref,r,n)}finally{memory.free(n),memory.free(r)}},e.prototype.removeExport=function(e){var t=u(e);try{_BinaryenRemoveExport(this.ref,t)}finally{memory.free(t)}},e.prototype.addFunctionImport=function(e,t,r,n){var i=u(e),a=u(t),s=u(r);try{return 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m=r[_].buffer,g=r[_].offset;p[_]=c(m),h[_]=n==i.Target.WASM64?this.createI64(i64_low(g),i64_high(g)):this.createI32(i64_low(g)),d[_]=m.length}var y=l(p),E=l(h),f=l(d);try{_BinaryenSetMemory(this.ref,e,t,s,y,E,f,o)}finally{memory.free(f),memory.free(E),memory.free(y);for(_=o-1;_>=0;--_)memory.free(p[_]);memory.free(s)}},e.prototype.setFunctionTable=function(e){var t=p(e);try{_BinaryenSetFunctionTable(this.ref,t,e.length)}finally{memory.free(t)}},e.prototype.setStart=function(e){_BinaryenSetStart(this.ref,e)},e.prototype.getOptimizeLevel=function(){return _BinaryenGetOptimizeLevel()},e.prototype.setOptimizeLevel=function(e){void 0===e&&(e=2),_BinaryenSetOptimizeLevel(e)},e.prototype.getShrinkLevel=function(){return _BinaryenGetShrinkLevel()},e.prototype.setShrinkLevel=function(e){void 0===e&&(e=1),_BinaryenSetShrinkLevel(e)},e.prototype.setDebugInfo=function(e){void 0===e&&(e=!1),_BinaryenSetDebugInfo(e)},e.prototype.optimize=function(e){void 0===e&&(e=0),e?_BinaryenFunctionOptimize(e,this.ref):_BinaryenModuleOptimize(this.ref)},e.prototype.runPasses=function(e,t){void 0===t&&(t=0);for(var r=e.length,n=new Array(r),i=0;i<r;++i)n[i]=u(e[i]);var a=l(n);try{t?_BinaryenFunctionRunPasses(t,this.ref,a,r):_BinaryenModuleRunPasses(this.ref,a,r)}finally{memory.free(a);for(i=r;i>=0;--i)memory.free(n[i])}},e.prototype.precomputeExpression=function(e){var t=_BinaryenGetOptimizeLevel(),r=_BinaryenGetShrinkLevel(),n=_BinaryenGetDebugInfo();_BinaryenSetOptimizeLevel(4),_BinaryenSetShrinkLevel(0),_BinaryenSetDebugInfo(!1);var i=_BinaryenExpressionGetType(e),a=this.addTemporaryFunction(i,null,e),s=this.cachedPrecomputeNames;if(!s){var o=u("precompute");this.cachedPrecomputeName=o,this.cachedPrecomputeNames=s=l([o])}return _BinaryenFunctionRunPasses(a,this.ref,s,1),e=_BinaryenFunctionGetBody(a),this.removeTemporaryFunction(),_BinaryenSetOptimizeLevel(t),_BinaryenSetShrinkLevel(r),_BinaryenSetDebugInfo(n),e},e.prototype.validate=function(){return 1==_BinaryenModuleValidate(this.ref)},e.prototype.interpret=function(){_BinaryenModuleInterpret(this.ref)},e.prototype.toBinary=function(e){var t=this.cachedByValue,r=u(e),n=0,i=0;try{_BinaryenModuleAllocateAndWrite(t,this.ref,r),n=h(t);var a=h(t+4);i=h(t+8);var s=new _;return s.output=function(e,t){for(var r=new Uint8Array(t),n=0;n<t;++n)r[n]=load(e+n);return r}(n,a),s.sourceMap=d(i),s}finally{r&&memory.free(r),n&&memory.free(n),i&&memory.free(i)}},e.prototype.toText=function(){throw new Error("not implemented")},e.prototype.toAsmjs=function(){throw new Error("not implemented")},e.prototype.dispose=function(){assert(this.ref),memory.free(this.cachedByValue),memory.free(this.cachedTemporaryName),memory.free(this.cachedPrecomputeName),memory.free(this.cachedPrecomputeNames),_BinaryenModuleDispose(this.ref),this.ref=0},e.prototype.createRelooper=function(){return o.create(this)},e.prototype.cloneExpression=function(e,t,r){if(void 0===t&&(t=!1),void 0===r&&(r=i32.MAX_VALUE),r<0)return 0;var i,a;switch(r-=1,_BinaryenExpressionGetId(e)){case n.Const:switch(_BinaryenExpressionGetType(e)){case 1:return this.createI32(_BinaryenConstGetValueI32(e));case 2:return this.createI64(_BinaryenConstGetValueI64Low(e),_BinaryenConstGetValueI64High(e));case 3:return this.createF32(_BinaryenConstGetValueF32(e));case 4:return this.createF64(_BinaryenConstGetValueF64(e));default:throw new Error("concrete type expected")}case n.GetLocal:return _BinaryenGetLocal(this.ref,_BinaryenGetLocalGetIndex(e),_BinaryenExpressionGetType(e));case n.GetGlobal:var s=_BinaryenGetGlobalGetName(e);if(!s)break;return _BinaryenGetGlobal(this.ref,s,_BinaryenExpressionGetType(e));case n.Load:if(!(i=this.cloneExpression(_BinaryenLoadGetPtr(e),t,r)))break;return _BinaryenLoadIsAtomic(e)?_BinaryenAtomicLoad(this.ref,_BinaryenLoadGetBytes(e),_BinaryenLoadGetOffset(e),_BinaryenExpressionGetType(e),i):_BinaryenLoad(this.ref,_BinaryenLoadGetBytes(e),_BinaryenLoadIsSigned(e)?1:0,_BinaryenLoadGetOffset(e),_BinaryenLoadGetAlign(e),_BinaryenExpressionGetType(e),i);case n.Unary:if(!(i=this.cloneExpression(_BinaryenUnaryGetValue(e),t,r)))break;return _BinaryenUnary(this.ref,_BinaryenUnaryGetOp(e),i);case n.Binary:if(!(i=this.cloneExpression(_BinaryenBinaryGetLeft(e),t,r)))break;if(!(a=this.cloneExpression(_BinaryenBinaryGetRight(e),t,r)))break;return _BinaryenBinary(this.ref,_BinaryenBinaryGetOp(e),i,a)}return 0},e.prototype.addDebugInfoFile=function(e){var t=u(e);try{return _BinaryenModuleAddDebugInfoFileName(this.ref,t)}finally{memory.free(t)}},e.prototype.getDebugInfoFile=function(e){return d(_BinaryenModuleGetDebugInfoFileName(this.ref,e))},e.prototype.setDebugLocation=function(e,t,r,n,i){_BinaryenFunctionSetDebugLocation(e,t,r,n,i)},e.MAX_MEMORY_WASM32=65535,e.MAX_MEMORY_WASM64=65535,e}();t.Module=s,t.getExpressionId=function(e){return _BinaryenExpressionGetId(e)},t.getExpressionType=function(e){return _BinaryenExpressionGetType(e)},t.getConstValueI32=function(e){return _BinaryenConstGetValueI32(e)},t.getConstValueI64Low=function(e){return _BinaryenConstGetValueI64Low(e)},t.getConstValueI64High=function(e){return _BinaryenConstGetValueI64High(e)},t.getConstValueF32=function(e){return _BinaryenConstGetValueF32(e)},t.getConstValueF64=function(e){return _BinaryenConstGetValueF64(e)},t.getGetLocalIndex=function(e){return _BinaryenGetLocalGetIndex(e)},t.getSetLocalIndex=function(e){return _BinaryenSetLocalGetIndex(e)},t.getSetLocalValue=function(e){return _BinaryenSetLocalGetValue(e)},t.isTeeLocal=function(e){return _BinaryenSetLocalIsTee(e)},t.getBinaryOp=function(e){return _BinaryenBinaryGetOp(e)},t.getBinaryLeft=function(e){return _BinaryenBinaryGetLeft(e)},t.getBinaryRight=function(e){return _BinaryenBinaryGetRight(e)},t.getUnaryOp=function(e){return _BinaryenUnaryGetOp(e)},t.getUnaryValue=function(e){return _BinaryenUnaryGetValue(e)},t.getLoadBytes=function(e){return _BinaryenLoadGetBytes(e)},t.getLoadOffset=function(e){return _BinaryenLoadGetOffset(e)},t.getLoadPtr=function(e){return _BinaryenLoadGetPtr(e)},t.isLoadSigned=function(e){return _BinaryenLoadIsSigned(e)},t.getStoreBytes=function(e){return _BinaryenStoreGetBytes(e)},t.getStoreOffset=function(e){return _BinaryenStoreGetOffset(e)},t.getStorePtr=function(e){return _BinaryenStoreGetPtr(e)},t.getStoreValue=function(e){return _BinaryenStoreGetValue(e)},t.getBlockName=function(e){return d(_BinaryenBlockGetName(e))},t.getBlockChildCount=function(e){return _BinaryenBlockGetNumChildren(e)},t.getBlockChild=function(e,t){return _BinaryenBlockGetChild(e,t)},t.getIfCondition=function(e){return _BinaryenIfGetCondition(e)},t.getIfTrue=function(e){return _BinaryenIfGetIfTrue(e)},t.getIfFalse=function(e){return _BinaryenIfGetIfFalse(e)},t.getLoopName=function(e){return d(_BinaryenLoopGetName(e))},t.getLoopBody=function(e){return _BinaryenLoopGetBody(e)},t.getBreakName=function(e){return d(_BinaryenBreakGetName(e))},t.getBreakCondition=function(e){return _BinaryenBreakGetCondition(e)},t.getSelectThen=function(e){return _BinaryenSelectGetIfTrue(e)},t.getSelectElse=function(e){return _BinaryenSelectGetIfFalse(e)},t.getSelectCondition=function(e){return _BinaryenSelectGetCondition(e)},t.getDropValue=function(e){return _BinaryenDropGetValue(e)},t.getReturnValue=function(e){return _BinaryenReturnGetValue(e)},t.getCallTarget=function(e){return d(_BinaryenCallGetTarget(e))},t.getHostOp=function(e){return _BinaryenHostGetOp(e)},t.getHostOperandCount=function(e){return _BinaryenHostGetNumOperands(e)},t.getHostOperand=function(e,t){return _BinaryenHostGetOperand(e,t)},t.getHostName=function(e){return d(_BinaryenHostGetNameOperand(e))},t.getFunctionBody=function(e){return _BinaryenFunctionGetBody(e)},t.getFunctionName=function(e){return d(_BinaryenFunctionGetName(e))},t.getFunctionParamCount=function(e){return _BinaryenFunctionGetNumParams(e)},t.getFunctionParamType=function(e,t){return _BinaryenFunctionGetParam(e,t)},t.getFunctionResultType=function(e){return _BinaryenFunctionGetResult(e)};var o=function(){function e(){}return e.create=function(t){var r=new e;return r.module=t,r.ref=_RelooperCreate(),r},e.prototype.addBlock=function(e){return _RelooperAddBlock(this.ref,e)},e.prototype.addBranch=function(e,t,r,n){void 0===r&&(r=0),void 0===n&&(n=0),_RelooperAddBranch(e,t,r,n)},e.prototype.addBlockWithSwitch=function(e,t){return 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a=e.charCodeAt(n);a>=55296&&a<=57343&&n+1<i&&(a=65536+((1023&a)<<10)|1023&e.charCodeAt(++n)),a<=127?store(r++,a):a<=2047?(store(r++,192|a>>>6),store(r++,128|63&a)):a<=65535?(store(r++,224|a>>>12),store(r++,128|a>>>6&63),store(r++,128|63&a)):a<=2097151?(store(r++,240|a>>>18),store(r++,128|a>>>12&63),store(r++,128|a>>>6&63),store(r++,128|63&a)):a<=67108863?(store(r++,248|a>>>24),store(r++,128|a>>>18&63),store(r++,128|a>>>12&63),store(r++,128|a>>>6&63),store(r++,128|63&a)):(store(r++,252|a>>>30),store(r++,128|a>>>24&63),store(r++,128|a>>>18&63),store(r++,128|a>>>12&63),store(r++,128|a>>>6&63),store(r++,128|63&a))}return store(r,0),t}function h(e){return load(e)|load(e+1)<<8|load(e+2)<<16|load(e+3)<<24}function d(e){if(!e)return null;for(var t,r,n,i,a,s=new Array;t=load(e++);)128&t?(r=63&load(e++),192!=(224&t)?(n=63&load(e++),224==(240&t)?t=(15&t)<<12|r<<6|n:(i=63&load(e++),240==(248&t)?t=(7&t)<<18|r<<12|n<<6|i:(a=63&load(e++),t=248==(252&t)?(3&t)<<24|r<<18|n<<12|i<<6|a:(1&t)<<30|r<<24|n<<18|i<<12|a<<6|63&load(e++))),s.push(t)):s.push((31&t)<<6|r)):s.push(t);return String.fromCodePoints(s)}t.Relooper=o,t.readString=d;var _=function(){return function(){}}();t.BinaryModule=_,t.needsExplicitUnreachable=function e(t){switch(_BinaryenExpressionGetType(t)){case 1:case 2:case 3:case 4:return!1}switch(_BinaryenExpressionGetId(t)){case n.Unreachable:case n.Return:return!1;case n.Break:return 0!=_BinaryenBreakGetCondition(t);case n.Block:if(!_BinaryenBlockGetName(t)){var r=_BinaryenBlockGetNumChildren(t);return r>0&&e(_BinaryenBlockGetChild(t,r-1))}}return!0}},function(e,t){var r;r=function(){return this}();try{r=r||Function("return this")()||(0,eval)("this")}catch(e){"object"==typeof window&&(r=window)}e.exports=r},function(e,t,r){"use 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this.size<=e.size;return!1},e.commonCompatible=function(e,t,r){return t.isAssignableTo(e,r)?e:e.isAssignableTo(t,r)?t:null},e.prototype.toString=function(e){if(void 0===e&&(e=!1),!e&&this.is(256)){var t=this.classReference;if(t)return this.is(512)?t.toString()+" | null":t.toString();var r=this.signatureReference;if(r)return this.is(512)?"("+r.toString(!0)+") | null":r.toString(!0);assert(!1)}switch(this.kind){case 0:return"i8";case 1:return"i16";case 2:return"i32";case 3:return"i64";case 4:return"isize";case 5:return"u8";case 6:return"u16";case 7:return"u32";case 8:return"u64";case 9:return"usize";case 10:return"bool";case 11:return"f32";case 12:return"f64";default:assert(!1);case 13:return"void"}},e.prototype.toNativeType=function(){switch(this.kind){default:return 1;case 3:case 8:return 2;case 4:case 9:return 64==this.size?2:1;case 11:return 3;case 12:return 4;case 13:return 0}},e.prototype.toNativeZero=function(e){switch(this.kind){case 13:assert(!1);default:return e.createI32(0);case 4:case 9:if(64!=this.size)return e.createI32(0);case 3:case 8:return e.createI64(0);case 11:return e.createF32(0);case 12:return e.createF64(0)}},e.prototype.toNativeOne=function(e){switch(this.kind){case 13:assert(!1);default:return e.createI32(1);case 4:case 9:if(64!=this.size)return e.createI32(1);case 3:case 8:return e.createI64(1);case 11:return e.createF32(1);case 12:return e.createF64(1)}},e.prototype.toNativeNegOne=function(e){switch(this.kind){case 13:assert(!1);default:return e.createI32(-1);case 4:case 9:if(64!=this.size)return e.createI32(-1);case 3:case 8:return e.createI64(-1,-1);case 11:return e.createF32(-1);case 12:return e.createF64(-1)}},e.prototype.toSignatureString=function(){switch(this.kind){default:return"i";case 3:case 8:return"I";case 4:case 9:return 64==this.size?"I":"i";case 11:return"f";case 12:return"F";case 13:return"v"}},e.i8=new e(0,165,8),e.i16=new e(1,165,16),e.i32=new e(2,133,32),e.i64=new e(3,197,64),e.isize32=new 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i.AMPERSAND_AMPERSAND:return"&&";case i.BAR_BAR:return"||";case i.EQUALS:return"=";case i.PLUS_EQUALS:return"+=";case i.MINUS_EQUALS:return"-=";case i.ASTERISK_EQUALS:return"*=";case i.ASTERISK_ASTERISK_EQUALS:return"**=";case i.SLASH_EQUALS:return"/=";case i.PERCENT_EQUALS:return"%=";case i.LESSTHAN_LESSTHAN_EQUALS:return"<<=";case i.GREATERTHAN_GREATERTHAN_EQUALS:return">>=";case i.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:return">>>=";case i.AMPERSAND_EQUALS:return"&=";case i.BAR_EQUALS:return"|=";case i.CARET_EQUALS:return"^=";default:return assert(!1),""}};var u=function(){function e(e,t,r){this.debugInfoRef=0,this.source=e,this.start=t,this.end=r}return e.join=function(t,r){if(t.source!=r.source)throw new Error("source mismatch");return new e(t.source,t.start<r.start?t.start:r.start,t.end>r.end?t.end:r.end)},Object.defineProperty(e.prototype,"atStart",{get:function(){return new e(this.source,this.start,this.start)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"atEnd",{get:function(){return new e(this.source,this.end,this.end)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"line",{get:function(){for(var e=this.source.text,t=1,r=this.start;r>=0;--r)10==e.charCodeAt(r)&&t++;return t},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"column",{get:function(){for(var e=this.source.text,t=0,r=this.start-1;r>=0&&10!=e.charCodeAt(r);--r)++t;return t},enumerable:!0,configurable:!0}),e.prototype.toString=function(){return this.source.text.substring(this.start,this.end)},e}();t.Range=u;var h=function(e){function t(t,r){void 0===r&&(r=null);var n=e.call(this,r)||this;n.end=0,n.pos=0,n.token=-1,n.tokenPos=0,n.nextToken=-1,n.nextTokenPos=0,n.nextTokenOnNewLine=!1,n.onComment=null,n.source=t,n.pos=0,n.end=t.text.length,n.diagnostics=r||new Array;var i=t.text;if(n.pos<n.end&&65279==i.charCodeAt(n.pos)&&++n.pos,n.pos+1<n.end&&35==i.charCodeAt(n.pos)&&33==i.charCodeAt(n.pos+1))for(n.pos+=2;n.pos<n.end&&10!=i.charCodeAt(n.pos);)++n.pos;return n}return n(t,e),t.prototype.next=function(e){return void 0===e&&(e=a.DEFAULT),this.nextToken=-1,this.token=this.unsafeNext(e)},t.prototype.unsafeNext=function(e,t){void 0===e&&(e=a.DEFAULT),void 0===t&&(t=i32.MAX_VALUE);for(var r=this.source.text;this.pos<this.end;){this.tokenPos=this.pos;var n=r.charCodeAt(this.pos);switch(n){case 13:if(!(++this.pos<this.end&&10==r.charCodeAt(this.pos)))break;case 10:case 9:case 11:case 12:case 32:++this.pos;break;case 33:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.EXCLAMATION_EQUALS_EQUALS):i.EXCLAMATION_EQUALS):i.EXCLAMATION;case 34:case 39:case 96:return i.STRINGLITERAL;case 37:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.PERCENT_EQUALS):i.PERCENT;case 38:if(++this.pos,t>1&&this.pos<this.end){if(38==r.charCodeAt(this.pos))return++this.pos,i.AMPERSAND_AMPERSAND;if(61==r.charCodeAt(this.pos))return++this.pos,i.AMPERSAND_EQUALS}return i.AMPERSAND;case 40:return++this.pos,i.OPENPAREN;case 41:return++this.pos,i.CLOSEPAREN;case 42:if(++this.pos,t>1&&this.pos<this.end){if(61==r.charCodeAt(this.pos))return++this.pos,i.ASTERISK_EQUALS;if(42==r.charCodeAt(this.pos))return++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.ASTERISK_ASTERISK_EQUALS):i.ASTERISK_ASTERISK}return i.ASTERISK;case 43:if(++this.pos,t>1&&this.pos<this.end){if(43==r.charCodeAt(this.pos))return++this.pos,i.PLUS_PLUS;if(61==r.charCodeAt(this.pos))return++this.pos,i.PLUS_EQUALS}return i.PLUS;case 44:return++this.pos,i.COMMA;case 45:if(++this.pos,t>1&&this.pos<this.end){if(45==r.charCodeAt(this.pos))return++this.pos,i.MINUS_MINUS;if(61==r.charCodeAt(this.pos))return++this.pos,i.MINUS_EQUALS}return i.MINUS;case 46:if(++this.pos,t>1&&this.pos<this.end){if(c.isDecimalDigit(r.charCodeAt(this.pos)))return--this.pos,i.FLOATLITERAL;if(t>2&&this.pos+1<this.end&&46==r.charCodeAt(this.pos)&&46==r.charCodeAt(this.pos+1))return this.pos+=2,i.DOT_DOT_DOT}return i.DOT;case 47:var u=this.pos;if(++this.pos,t>1&&this.pos<this.end){if(47==r.charCodeAt(this.pos)){var h=o.CommentKind.LINE;for(this.pos+1<this.end&&47==r.charCodeAt(this.pos+1)&&(++this.pos,h=o.CommentKind.TRIPLE);++this.pos<this.end;)if(10==r.charCodeAt(this.pos)){++this.pos;break}this.onComment&&this.onComment(h,r.substring(u,this.pos),this.range(u,this.pos));break}if(42==r.charCodeAt(this.pos)){for(var d=!1;++this.pos<this.end;)if(42==(n=r.charCodeAt(this.pos))&&this.pos+1<this.end&&47==r.charCodeAt(this.pos+1)){this.pos+=2,d=!0;break}d?this.onComment&&this.onComment(o.CommentKind.BLOCK,r.substring(u,this.pos),this.range(u,this.pos)):this.error(s.DiagnosticCode._0_expected,this.range(this.pos),"*/");break}if(61==r.charCodeAt(this.pos))return++this.pos,i.SLASH_EQUALS}return i.SLASH;case 48:case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:return this.testInteger()?i.INTEGERLITERAL:i.FLOATLITERAL;case 58:return++this.pos,i.COLON;case 59:return++this.pos,i.SEMICOLON;case 60:if(++this.pos,t>1&&this.pos<this.end){if(60==r.charCodeAt(this.pos))return++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.LESSTHAN_LESSTHAN_EQUALS):i.LESSTHAN_LESSTHAN;if(61==r.charCodeAt(this.pos))return++this.pos,i.LESSTHAN_EQUALS}return i.LESSTHAN;case 61:if(++this.pos,t>1&&this.pos<this.end){if(61==r.charCodeAt(this.pos))return++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.EQUALS_EQUALS_EQUALS):i.EQUALS_EQUALS;if(62==r.charCodeAt(this.pos))return++this.pos,i.EQUALS_GREATERTHAN}return i.EQUALS;case 62:if(++this.pos,t>1&&this.pos<this.end){if(62==r.charCodeAt(this.pos)){if(++this.pos,t>2&&this.pos<this.end){if(62==r.charCodeAt(this.pos))return++this.pos,t>3&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS):i.GREATERTHAN_GREATERTHAN_GREATERTHAN;if(61==r.charCodeAt(this.pos))return++this.pos,i.GREATERTHAN_GREATERTHAN_EQUALS}return i.GREATERTHAN_GREATERTHAN}if(61==r.charCodeAt(this.pos))return++this.pos,i.GREATERTHAN_EQUALS}return i.GREATERTHAN;case 63:return++this.pos,i.QUESTION;case 91:return++this.pos,i.OPENBRACKET;case 93:return++this.pos,i.CLOSEBRACKET;case 94:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.CARET_EQUALS):i.CARET;case 123:return++this.pos,i.OPENBRACE;case 124:if(++this.pos,t>1&&this.pos<this.end){if(124==r.charCodeAt(this.pos))return++this.pos,i.BAR_BAR;if(61==r.charCodeAt(this.pos))return++this.pos,i.BAR_EQUALS}return i.BAR;case 125:return++this.pos,i.CLOSEBRACE;case 126:return++this.pos,i.TILDE;case 64:return++this.pos,i.AT;default:if(c.isIdentifierStart(n)){if(c.isKeywordCharacter(n)){for(var _=this.pos;++this.pos<this.end&&c.isIdentifierPart(n=r.charCodeAt(this.pos));)if(!c.isKeywordCharacter(n))return this.pos=_,i.IDENTIFIER;var m=l(r.substring(_,this.pos));if(m!=i.INVALID&&e!==a.ALWAYS&&(e!==a.PREFER||!p(m)))return m;this.pos=_}return i.IDENTIFIER}if(c.isWhiteSpace(n)){++this.pos;break}return this.error(s.DiagnosticCode.Invalid_character,this.range(this.pos,this.pos+1)),++this.pos,i.INVALID}}return i.ENDOFFILE},t.prototype.peek=function(e,t,r){void 0===e&&(e=!1),void 0===t&&(t=a.DEFAULT),void 0===r&&(r=i32.MAX_VALUE);var n=this.source.text;if(this.nextToken<0){var i=this.pos,s=this.token,o=this.tokenPos;if(this.nextToken=this.unsafeNext(t,r),this.nextTokenPos=this.tokenPos,e){this.nextTokenOnNewLine=!1;for(var l=i,p=this.nextTokenPos;l<p;++l)if(c.isLineBreak(n.charCodeAt(l))){this.nextTokenOnNewLine=!0;break}}this.pos=i,this.token=s,this.tokenPos=o}return this.nextToken},t.prototype.skipIdentifier=function(){return this.skip(i.IDENTIFIER,a.PREFER)},t.prototype.skipIdentifierName=function(){return this.skip(i.IDENTIFIER,a.ALWAYS)},t.prototype.skip=function(e,t){void 0===t&&(t=a.DEFAULT);var r=this.pos,n=this.token,s=this.tokenPos,o=i32.MAX_VALUE;switch(e){case i.GREATERTHAN:o=1}return this.token=this.unsafeNext(t,o),this.token==e?(this.nextToken=-1,!0):(this.pos=r,this.token=n,this.tokenPos=s,!1)},t.prototype.mark=function(){var e;return _?(e=_,_=null):e=new d,e.pos=this.pos,e.token=this.token,e.tokenPos=this.tokenPos,e},t.prototype.discard=function(e){_=e},t.prototype.reset=function(e){this.pos=e.pos,this.token=e.token,this.tokenPos=e.tokenPos,this.nextToken=-1},t.prototype.range=function(e,t){return void 0===e&&(e=-1),void 0===t&&(t=-1),e<0?(e=this.tokenPos,t=this.pos):t<0&&(t=e),new u(this.source,e,t)},t.prototype.readIdentifier=function(){for(var e=this.source.text,t=this.pos;++this.pos<this.end&&c.isIdentifierPart(e.charCodeAt(this.pos)););return e.substring(t,this.pos)},t.prototype.readString=function(){for(var e=this.source.text,t=e.charCodeAt(this.pos++),r=this.pos,n="";;){if(this.pos>=this.end){n+=e.substring(r,this.pos),this.error(s.DiagnosticCode.Unterminated_string_literal,this.range(r-1,this.end));break}var i=e.charCodeAt(this.pos);if(i==t){n+=e.substring(r,this.pos++);break}if(92!=i){if(c.isLineBreak(i)){n+=e.substring(r,this.pos),this.error(s.DiagnosticCode.Unterminated_string_literal,this.range(r-1,this.pos));break}++this.pos}else n+=e.substring(r,this.pos),n+=this.readEscapeSequence(),r=this.pos}return n},t.prototype.readEscapeSequence=function(){if(++this.pos>=this.end)return this.error(s.DiagnosticCode.Unexpected_end_of_text,this.range(this.end)),"";var e=this.source.text,t=e.charCodeAt(this.pos++);switch(t){case 48:return"\0";case 98:return"\b";case 116:return"\t";case 110:return"\n";case 118:return"\v";case 102:return"\f";case 114:return"\r";case 39:return"'";case 34:return'"';case 117:return this.pos<this.end&&123==e.charCodeAt(this.pos)?(++this.pos,this.readExtendedUnicodeEscape()):this.readUnicodeEscape();case 13:this.pos<this.end&&10==e.charCodeAt(this.pos)&&++this.pos;case 10:case 8232:case 8233:return"";default:return String.fromCharCode(t)}},t.prototype.readRegexpPattern=function(){for(var e=this.source.text,t=this.pos,r=!1;;){if(this.pos>=this.end){this.error(s.DiagnosticCode.Unterminated_regular_expression_literal,this.range(t,this.end));break}if(92!=e.charCodeAt(this.pos)){var n=e.charCodeAt(this.pos);if(47==n&&!r)break;if(c.isLineBreak(n)){this.error(s.DiagnosticCode.Unterminated_regular_expression_literal,this.range(t,this.pos));break}++this.pos,r=!1}else++this.pos,r=!0}return e.substring(t,this.pos)},t.prototype.readRegexpFlags=function(){for(var e=this.source.text,t=this.pos,r=0;this.pos<this.end;){var n=e.charCodeAt(this.pos);if(!c.isIdentifierPart(n))break;switch(++this.pos,n){case 103:r|=1&r?-1:1;break;case 105:r|=2&r?-1:2;break;case 109:r|=4&r?-1:4;break;default:r=-1}}return-1==r&&this.error(s.DiagnosticCode.Invalid_regular_expression_flags,this.range(t,this.pos)),e.substring(t,this.pos)},t.prototype.testInteger=function(){var e=this.source.text;if(48==e.charCodeAt(this.pos)&&this.pos+1<this.end)switch(e.charCodeAt(this.pos+2)){case 88:case 120:case 66:case 98:case 79:case 111:return!0}for(var t=this.pos;t<this.end;){var r=e.charCodeAt(t);if(46==r||69==r||101==r)return!1;if((r<48||r>57)&&95!=r)break;t++}return!0},t.prototype.readInteger=function(){var e=this.source.text;if(48==e.charCodeAt(this.pos)&&this.pos+2<this.end){switch(e.charCodeAt(this.pos+1)){case 88:case 120:return this.pos+=2,this.readHexInteger();case 66:case 98:return this.pos+=2,this.readBinaryInteger();case 79:case 111:return this.pos+=2,this.readOctalInteger()}if(c.isOctalDigit(e.charCodeAt(this.pos+1))){var t=this.pos;++this.pos;var r=this.readOctalInteger();return this.error(s.DiagnosticCode.Octal_literals_are_not_allowed_in_strict_mode,this.range(t,this.pos)),r}}return this.readDecimalInteger()},t.prototype.readHexInteger=function(){for(var e=this.source.text,t=this.pos,r=i64_new(0,0),n=i64_new(16,0),i=t;this.pos<this.end;){var a=this.pos,o=e.charCodeAt(a);if(o>=48&&o<=57)r=i64_add(i64_mul(r,n),i64_new(o-48,0));else if(o>=65&&o<=70)r=i64_add(i64_mul(r,n),i64_new(10+o-65,0));else if(o>=97&&o<=102)r=i64_add(i64_mul(r,n),i64_new(10+o-97,0));else{if(95!=o)break;i==a&&this.error(i==t?s.DiagnosticCode.Numeric_separators_are_not_allowed_here:s.DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,this.range(a)),i=a+1}this.pos=a+1}return this.pos==t?this.error(s.DiagnosticCode.Hexadecimal_digit_expected,this.range(t)):i==this.pos&&this.error(s.DiagnosticCode.Numeric_separators_are_not_allowed_here,this.range(i-1)),r},t.prototype.readDecimalInteger=function(){for(var e=this.source.text,t=this.pos,r=i64_new(0,0),n=i64_new(10,0),i=t;this.pos<this.end;){var a=this.pos,o=e.charCodeAt(a);if(o>=48&&o<=57)r=i64_add(i64_mul(r,n),i64_new(o-48,0));else{if(95!=o)break;i==a&&this.error(i==t?s.DiagnosticCode.Numeric_separators_are_not_allowed_here:s.DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,this.range(a)),i=a+1}this.pos=a+1}return this.pos==t?this.error(s.DiagnosticCode.Digit_expected,this.range(t)):i==this.pos&&this.error(s.DiagnosticCode.Numeric_separators_are_not_allowed_here,this.range(i-1)),r},t.prototype.readOctalInteger=function(){for(var e=this.source.text,t=this.pos,r=i64_new(0,0),n=i64_new(8,0),i=t;this.pos<this.end;){var a=this.pos,o=e.charCodeAt(a);if(o>=48&&o<=55)r=i64_add(i64_mul(r,n),i64_new(o-48,0));else{if(95!=o)break;i==a&&this.error(i==t?s.DiagnosticCode.Numeric_separators_are_not_allowed_here:s.DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,this.range(a)),i=a+1}++this.pos}return this.pos==t?this.error(s.DiagnosticCode.Octal_digit_expected,this.range(t)):i==this.pos&&this.error(s.DiagnosticCode.Numeric_separators_are_not_allowed_here,this.range(i-1)),r},t.prototype.readBinaryInteger=function(){for(var e=this.source.text,t=this.pos,r=i64_new(0,0),n=i64_new(2,0),i=i64_new(1,0),a=t;this.pos<this.end;){var o=this.pos,c=e.charCodeAt(o);if(48==c)r=i64_mul(r,n);else if(49==c)r=i64_add(i64_mul(r,n),i);else{if(95!=c)break;a==o&&this.error(a==t?s.DiagnosticCode.Numeric_separators_are_not_allowed_here:s.DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,this.range(o)),a=o+1}this.pos=o+1}return this.pos==t?this.error(s.DiagnosticCode.Binary_digit_expected,this.range(t)):a==this.pos&&this.error(s.DiagnosticCode.Numeric_separators_are_not_allowed_here,this.range(a-1)),r},t.prototype.readFloat=function(){return this.readDecimalFloat()},t.prototype.readDecimalFloat=function(){for(var e=this.pos,t=this.source.text;this.pos<this.end&&c.isDecimalDigit(t.charCodeAt(this.pos));)++this.pos;if(this.pos<this.end&&46==t.charCodeAt(this.pos))for(++this.pos;this.pos<this.end&&c.isDecimalDigit(t.charCodeAt(this.pos));)++this.pos;if(this.pos<this.end){var r=t.charCodeAt(this.pos);if(69==r||101==r)for(++this.pos<this.end&&(45==t.charCodeAt(this.pos)||43==t.charCodeAt(this.pos))&&c.isDecimalDigit(t.charCodeAt(this.pos+1))&&++this.pos;this.pos<this.end&&c.isDecimalDigit(t.charCodeAt(this.pos));)++this.pos}return parseFloat(t.substring(e,this.pos))},t.prototype.readHexFloat=function(){throw new Error("not implemented")},t.prototype.readUnicodeEscape=function(){for(var e=4,t=0,r=this.source.text;this.pos<this.end;){var n=r.charCodeAt(this.pos++);if(n>=48&&n<=57)t=16*t+n-48;else if(n>=65&&n<=70)t=16*t+10+n-65;else{if(!(n>=97&&n<=102))return this.error(s.DiagnosticCode.Hexadecimal_digit_expected,this.range(this.pos-1,this.pos)),"";t=16*t+10+n-97}if(0==--e)break}return e?(this.error(s.DiagnosticCode.Unexpected_end_of_text,this.range(this.pos)),""):String.fromCharCode(t)},t.prototype.readExtendedUnicodeEscape=function(){var e=this.pos,t=this.readHexInteger(),r=i64_low(t),n=!1;assert(!i64_high(t)),r>1114111&&(this.error(s.DiagnosticCode.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive,this.range(e,this.pos)),n=!0);var i=this.source.text;return this.pos>=this.end?(this.error(s.DiagnosticCode.Unexpected_end_of_text,this.range(e,this.end)),n=!0):125==i.charCodeAt(this.pos)?++this.pos:(this.error(s.DiagnosticCode.Unterminated_Unicode_escape_sequence,this.range(e,this.pos)),n=!0),n?"":r<65536?String.fromCharCode(r):String.fromCharCode(55296+((r-65536)/1024|0),(r-65536)%1024+56320)},t.prototype.finish=function(){},t}(s.DiagnosticEmitter);t.Tokenizer=h;var d=function(){return function(){}}();t.State=d;var _=null},function(e,t,r){"use strict";var n=this&&this.__extends||function(){var e=function(t,r){return(e=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(e,t){e.__proto__=t}||function(e,t){for(var r in t)t.hasOwnProperty(r)&&(e[r]=t[r])})(t,r)};return function(t,r){function n(){this.constructor=t}e(t,r),t.prototype=null===r?Object.create(r):(n.prototype=r.prototype,new n)}}(),i=this&&this.__values||function(e){var t="function"==typeof Symbol&&e[Symbol.iterator],r=0;return t?t.call(e):{next:function(){return e&&r>=e.length&&(e=void 0),{value:e&&e[r++],done:!e}}}},a=this&&this.__read||function(e,t){var r="function"==typeof Symbol&&e[Symbol.iterator];if(!r)return e;var n,i,a=r.call(e),s=[];try{for(;(void 0===t||t-- >0)&&!(n=a.next()).done;)s.push(n.value)}catch(e){i={error:e}}finally{try{n&&!n.done&&(r=a.return)&&r.call(a)}finally{if(i)throw i.error}}return s};Object.defineProperty(t,"__esModule",{value:!0});var 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g),n.options=r,n.memoryOffset=i64_new(max(r.memoryBase,8)),n.module=l.Module.create(),n}return n(t,e),t.compile=function(e,r){return void 0===r&&(r=null),new t(e,r).compile()},t.prototype.compile=function(){var e,t,r=this.options,n=this.module,s=this.program;s.initialize(r);var c=new u.Function(s.startFunction,"start",new _.Signature([],_.Type.void));this.startFunctionInstance=c;var p=new Array;this.startFunctionBody=p,this.currentFunction=c;for(var h=s.sources,d=0,m=h.length;d<m;++d)h[d].isEntry&&this.compileSource(h[d]);if(p.length||null!==s.mainFunction){var g=c.signature,y=n.addFunction(c.internalName,this.ensureFunctionType(g.parameterTypes,g.returnType,g.thisType),_.typesToNativeTypes(c.additionalLocals),n.createBlock(null,p));c.finalize(n,y),s.mainFunction||n.setStart(y)}var E=this.memoryOffset;E=i64_align(E,r.usizeType.byteSize),this.memoryOffset=E,r.isWasm64?n.addGlobal("HEAP_BASE",2,!1,n.createI64(i64_low(E),i64_high(E))):n.addGlobal("HEAP_BASE",1,!1,n.createI32(i64_low(E)));var f=this.memorySegments.length?i64_low(i64_shr_u(i64_align(E,65536),i64_new(16,0))):0;n.setMemory(f,this.options.isWasm64?l.Module.MAX_MEMORY_WASM64:l.Module.MAX_MEMORY_WASM32,this.memorySegments,r.target,"memory"),r.importMemory&&n.addMemoryImport("0","env","memory");var T=this.functionTable,I=!1;T.length&&(n.setFunctionTable(T),n.addTableExport("0","table"),I=!0),r.importTable&&(n.addTableImport("0","env","table"),I||n.addTableExport("0","table"));try{for(var v=i(s.moduleLevelExports),A=v.next();!A.done;A=v.next()){var C=a(A.value,2),N=C[0],O=C[1];this.makeModuleExport(N,O.element)}}catch(t){e={error:t}}finally{try{A&&!A.done&&(t=v.return)&&t.call(v)}finally{if(e)throw e.error}}return this.needsIterateRoots&&o.compileIterateRoots(this),n},t.prototype.makeModuleExport=function(e,t,r){var n,a,s,o,l,h,d,m;void 0===r&&(r="");var g=t.members;if(g){var y=r+e+(t.kind==u.ElementKind.CLASS?p.INSTANCE_DELIMITER:p.STATIC_DELIMITER);if(t.kind==u.ElementKind.NAMESPACE)try{for(var E=i(g.values()),f=E.next();!f.done;f=E.next()){(v=f.value).is(p.CommonFlags.EXPORT)&&this.makeModuleExport(v.simpleName,v,y)}}catch(e){n={error:e}}finally{try{f&&!f.done&&(a=E.return)&&a.call(E)}finally{if(n)throw n.error}}else try{for(var T=i(g.values()),I=T.next();!I.done;I=T.next()){var v;(v=I.value).is(p.CommonFlags.PRIVATE)||this.makeModuleExport(v.simpleName,v,y)}}catch(e){s={error:e}}finally{try{I&&!I.done&&(o=T.return)&&o.call(T)}finally{if(s)throw s.error}}}switch(t.kind){case u.ElementKind.GLOBAL:if(t.is(p.CommonFlags.CONST)||t.is(p.CommonFlags.STATIC|p.CommonFlags.READONLY)||this.options.hasFeature(2))this.module.addGlobalExport(t.internalName,r+e);else(A=t.declaration)&&this.error(c.DiagnosticCode.Cannot_export_a_mutable_global,A.name.range);break;case u.ElementKind.ENUMVALUE:var A;if(assert(t.parent).is(p.CommonFlags.CONST)||this.options.hasFeature(2))this.module.addGlobalExport(t.internalName,r+e);else(A=t.declaration)&&this.error(c.DiagnosticCode.Cannot_export_a_mutable_global,A.name.range);break;case u.ElementKind.FUNCTION:var C=(G=t).signature;C.requiredParameters<C.parameterTypes.length&&(G=this.ensureTrampoline(G),this.ensureArgcSet()),G.is(p.CommonFlags.COMPILED)&&this.module.addFunctionExport(G.internalName,r+e);break;case u.ElementKind.PROPERTY:var N=assert(t.getterPrototype);this.makeModuleExport(p.GETTER_PREFIX+e,N,r);var O=t.setterPrototype;O&&this.makeModuleExport(p.SETTER_PREFIX+e,O,r);break;case u.ElementKind.FIELD:var S=this.module,L=t.type,b=L.toNativeType(),k=t.memoryOffset,R=this.options.usizeType,x=this.options.nativeSizeType,F=r+p.GETTER_PREFIX+e;if(S.addFunction(F,this.ensureFunctionType(null,L,R),null,S.createLoad(L.byteSize,L.is(1),S.createGetLocal(0,x),b,k)),S.addFunctionExport(F,F),!t.is(p.CommonFlags.READONLY)){var D=r+p.SETTER_PREFIX+e;S.addFunction(D,this.ensureFunctionType([L],_.Type.void,R),null,S.createStore(L.byteSize,S.createGetLocal(0,x),S.createGetLocal(1,b),b,k)),S.addFunctionExport(D,D)}break;case u.ElementKind.FUNCTION_PROTOTYPE:try{for(var B=i(t.instances.values()),U=B.next();!U.done;U=B.next()){var P=e;if((G=U.value).is(p.CommonFlags.GENERIC))P+=(K=G.internalName).substring(K.lastIndexOf("<"));this.makeModuleExport(P,G,r)}}catch(e){l={error:e}}finally{try{U&&!U.done&&(h=B.return)&&h.call(B)}finally{if(l)throw l.error}}break;case u.ElementKind.CLASS_PROTOTYPE:try{for(var w=i(t.instances.values()),M=w.next();!M.done;M=w.next()){var G,K;P=e;if((G=M.value).is(p.CommonFlags.GENERIC))P+=(K=G.internalName).substring(K.lastIndexOf("<"));var z=G.constructorInstance;z&&this.makeModuleExport(P+p.INSTANCE_DELIMITER+z.simpleName,z,r),this.makeModuleExport(P,G,r)}}catch(e){d={error:e}}finally{try{M&&!M.done&&(m=w.return)&&m.call(w)}finally{if(d)throw d.error}}break;case u.ElementKind.ENUM:case u.ElementKind.CLASS:case u.ElementKind.NAMESPACE:break;default:assert(!1)}},t.prototype.compileSourceByPath=function(e,t){var r=this.program.lookupSourceByPath(e);r?this.compileSource(r):this.error(c.DiagnosticCode.File_0_not_found,t.range,e)},t.prototype.compileSource=function(e){if(!e.is(p.CommonFlags.COMPILED)){e.set(p.CommonFlags.COMPILED);for(var t=this.options.noTreeShaking,r=e.isEntry,n=this.startFunctionInstance,i=this.startFunctionBody,a=e.statements,s=0,o=a.length;s<o;++s){var c=a[s];switch(c.kind){case d.NodeKind.CLASSDECLARATION:(t||r&&c.is(p.CommonFlags.EXPORT))&&!c.isGeneric&&this.compileClassDeclaration(c,[],null);break;case d.NodeKind.INTERFACEDECLARATION:break;case d.NodeKind.ENUMDECLARATION:(t||r&&c.is(p.CommonFlags.EXPORT))&&this.compileEnumDeclaration(c);break;case d.NodeKind.FUNCTIONDECLARATION:(t||r&&c.is(p.CommonFlags.EXPORT))&&!c.isGeneric&&this.compileFunctionDeclaration(c,[]);break;case d.NodeKind.IMPORT:this.compileSourceByPath(c.normalizedPath,c.path);break;case d.NodeKind.NAMESPACEDECLARATION:(t||r&&c.is(p.CommonFlags.EXPORT))&&this.compileNamespaceDeclaration(c);break;case d.NodeKind.VARIABLE:var l=this.compileVariableStatement(c);l&&i.push(l);break;case d.NodeKind.EXPORT:null!=c.normalizedPath&&this.compileSourceByPath(c.normalizedPath,c.path),(t||r)&&this.compileExportStatement(c);break;default:var u=this.currentFunction;this.currentFunction=n,i.push(this.compileStatement(c)),this.currentFunction=u}}}},t.prototype.compileGlobalDeclaration=function(e){var t=assert(this.program.elementsLookup.get(e.fileLevelInternalName));return assert(t.kind==u.ElementKind.GLOBAL),this.compileGlobal(t)?t:null},t.prototype.compileGlobal=function(e){if(e.is(p.CommonFlags.COMPILED))return!0;e.set(p.CommonFlags.COMPILED);var t=this.module,r=e.declaration,n=0;if(e.type==_.Type.void)if(r)if(r.type){var i=this.resolver.resolveType(r.type);if(!i)return!1;if(i==_.Type.void)return this.error(c.DiagnosticCode.Type_expected,r.type.range),!1;e.type=i}else{if(!r.initializer)return this.error(c.DiagnosticCode.Type_expected,r.name.range.atEnd),!1;if(n=this.compileExpressionRetainType(r.initializer,_.Type.void,1),this.currentType==_.Type.void)return this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,r.initializer.range,this.currentType.toString(),"<auto>"),!1;e.type=this.currentType}else assert(!1);if(e.is(p.CommonFlags.AMBIENT)&&e.hasDecorator(u.DecoratorFlags.BUILTIN))return!0;var a=e.type.toNativeType(),s=e.is(p.CommonFlags.CONST)||e.is(p.CommonFlags.STATIC|p.CommonFlags.READONLY);if(e.is(p.CommonFlags.AMBIENT))return s||this.options.hasFeature(2)?(e.set(p.CommonFlags.MODULE_IMPORT),r?T(e,r,e.parent):(y="env",E=e.simpleName),t.addGlobalImport(e.internalName,y,E,a),e.set(p.CommonFlags.COMPILED),!0):(this.error(c.DiagnosticCode.Operation_not_supported,assert(r).range),!1);var o=!1;if(null!==r&&null!==r.initializer){if(n||(n=this.compileExpression(r.initializer,e.type,1,1)),l.getExpressionId(n)!=l.ExpressionId.Const&&(s?(n=t.precomputeExpression(n),l.getExpressionId(n)!=l.ExpressionId.Const&&(this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,r.range),o=!0)):o=!0),e.hasDecorator(u.DecoratorFlags.INLINE)&&!o){switch(assert(l.getExpressionId(n)==l.ExpressionId.Const),l.getExpressionType(n)){case 1:e.constantValueKind=1,e.constantIntegerValue=i64_new(l.getConstValueI32(n),0);break;case 2:e.constantValueKind=1,e.constantIntegerValue=i64_new(l.getConstValueI64Low(n),l.getConstValueI64High(n));break;case 3:e.constantValueKind=2,e.constantFloatValue=l.getConstValueF32(n);break;case 4:e.constantValueKind=2,e.constantFloatValue=l.getConstValueF64(n);break;default:return assert(!1),!1}e.set(p.CommonFlags.INLINED)}}else n=e.type.toNativeZero(t);var h=e.internalName;return o?(t.addGlobal(h,a,!0,e.type.toNativeZero(t)),this.startFunctionBody.push(t.createSetGlobal(h,n))):t.addGlobal(h,a,!s,n),!0},t.prototype.compileEnumDeclaration=function(e){var t=assert(this.program.elementsLookup.get(e.fileLevelInternalName));return assert(t.kind==u.ElementKind.ENUM),this.compileEnum(t)?t:null},t.prototype.compileEnum=function(e){var t,r;if(e.is(p.CommonFlags.COMPILED))return!0;e.set(p.CommonFlags.COMPILED);var n=this.module;this.currentEnum=e;var a=null,s=!1;if(e.members)try{for(var o=i(e.members.values()),h=o.next();!h.done;h=o.next()){var d=h.value;if(d.kind==u.ElementKind.ENUMVALUE){var m=!1,g=d,y=g.declaration;g.set(p.CommonFlags.COMPILED);var E=void 0;y.value?(E=this.compileExpression(y.value,_.Type.i32,1,0),l.getExpressionId(E)!=l.ExpressionId.Const&&(e.is(p.CommonFlags.CONST)?(E=n.precomputeExpression(E),l.getExpressionId(E)!=l.ExpressionId.Const&&(this.error(c.DiagnosticCode.In_const_enum_declarations_member_initializer_must_be_constant_expression,y.value.range),m=!0)):m=!0)):null==a?E=n.createI32(0):(s&&this.error(c.DiagnosticCode.Enum_member_must_have_initializer,y.range),E=n.createBinary(l.BinaryOp.AddI32,n.createGetGlobal(a.internalName,1),n.createI32(1)),E=n.precomputeExpression(E),l.getExpressionId(E)!=l.ExpressionId.Const&&(e.is(p.CommonFlags.CONST)&&this.error(c.DiagnosticCode.In_const_enum_declarations_member_initializer_must_be_constant_expression,y.range),m=!0)),m?(n.addGlobal(g.internalName,1,!0,n.createI32(0)),this.startFunctionBody.push(n.createSetGlobal(g.internalName,E)),s=!0):(n.addGlobal(g.internalName,1,!e.is(p.CommonFlags.CONST),E),s=!1),a=g}}}catch(e){t={error:e}}finally{try{h&&!h.done&&(r=o.return)&&r.call(o)}finally{if(t)throw t.error}}return this.currentEnum=null,!0},t.prototype.compileFunctionDeclaration=function(e,t,r){void 0===r&&(r=null);var n=assert(this.program.elementsLookup.get(e.fileLevelInternalName));return assert(n.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.compileFunctionUsingTypeArguments(n,t,r,null,n.declaration.name)},t.prototype.compileFunctionUsingTypeArguments=function(e,t,r,n,i){var a=this.resolver.resolveFunctionInclTypeArguments(e,t,r,i);return a?(a.outerScope=n,this.compileFunction(a)?a:null):null},t.prototype.ensureFunctionType=function(e,t,r){void 0===r&&(r=null);var n,i=e?e.length:0,a=0;if(r?((n=new Array(1+i))[0]=r.toNativeType(),a=1):n=new Array(i),e)for(var s=0;s<i;++s,++a)n[a]=e[s].toNativeType();var o=t.toNativeType(),c=this.module,l=c.getFunctionTypeBySignature(o,n);if(!l){var p=_.Signature.makeSignatureString(e,t,r);l=c.addFunctionType(p,o,n)}return l},t.prototype.compileFunction=function(e){if(e.is(p.CommonFlags.COMPILED))return!0;assert(!(e.is(p.CommonFlags.AMBIENT)&&e.hasDecorator(u.DecoratorFlags.BUILTIN))),e.set(p.CommonFlags.COMPILED);var t,r=e.prototype.declaration,n=r.body;n?e.is(p.CommonFlags.AMBIENT)&&this.error(c.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,r.name.range):e.is(p.CommonFlags.AMBIENT)||this.error(c.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,r.name.range);var i=e.signature,a=this.ensureFunctionType(i.parameterTypes,i.returnType,i.thisType),s=this.module;if(n){var o=e.is(p.CommonFlags.CONSTRUCTOR),h=e.signature.returnType,m=this.currentFunction;this.currentFunction=e;var g=e.flow,f=void 0;if(n.kind==d.NodeKind.EXPRESSION)assert(!e.isAny(p.CommonFlags.CONSTRUCTOR|p.CommonFlags.GET|p.CommonFlags.SET|p.CommonFlags.MAIN)),assert(e.is(p.CommonFlags.ARROW)),f=this.compileExpression(n.expression,h,1,0),g.set(1),g.canOverflow(f,h)||g.set(2),g.finalize();else{assert(n.kind==d.NodeKind.BLOCK);var I=this.compileStatements(n.statements);if(e.is(p.CommonFlags.MAIN)&&(s.addGlobal("~started",1,!0,s.createI32(0)),I.unshift(s.createIf(s.createUnary(l.UnaryOp.EqzI32,s.createGetGlobal("~started",1)),s.createBlock(null,[s.createCall("start",null,0),s.createSetGlobal("~started",s.createI32(1))])))),g.finalize(),o){var v=this.options.nativeSizeType;if(assert(e.is(p.CommonFlags.INSTANCE)),!g.is(1))if(g.is(32))I.push(s.createGetLocal(0,v));else{var A=assert(e.parent);assert(A.kind==u.ElementKind.CLASS),I.push(s.createTeeLocal(0,this.makeConditionalAllocate(A,r.name)))}}else h==_.Type.void||g.is(1)||this.error(c.DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,r.signature.returnType.range);f=I.length?1==I.length?I[0]:s.createBlock(null,I,h.toNativeType()):s.createNop()}if(this.currentFunction=m,t=s.addFunction(e.internalName,a,_.typesToNativeTypes(e.additionalLocals),f),e.hasDecorator(u.DecoratorFlags.EXTERNAL)){var C=assert(d.findDecorator(d.DecoratorKind.EXTERNAL,r.decorators));this.error(c.DiagnosticCode.Operation_not_supported,C.range)}}else e.set(p.CommonFlags.MODULE_IMPORT),T(e,r,e.prototype.parent),t=s.addFunctionImport(e.internalName,y,E,a);return e.finalize(s,t),!0},t.prototype.compileNamespaceDeclaration=function(e){for(var t=e.members,r=this.options.noTreeShaking,n=0,i=t.length;n<i;++n){var a=t[n];switch(a.kind){case d.NodeKind.CLASSDECLARATION:!r&&!a.is(p.CommonFlags.EXPORT)||a.isGeneric||this.compileClassDeclaration(a,[]);break;case d.NodeKind.INTERFACEDECLARATION:!r&&!a.is(p.CommonFlags.EXPORT)||a.isGeneric||this.compileInterfaceDeclaration(a,[]);break;case d.NodeKind.ENUMDECLARATION:(r||a.is(p.CommonFlags.EXPORT))&&this.compileEnumDeclaration(a);break;case d.NodeKind.FUNCTIONDECLARATION:!r&&!a.is(p.CommonFlags.EXPORT)||a.isGeneric||this.compileFunctionDeclaration(a,[]);break;case d.NodeKind.NAMESPACEDECLARATION:(r||a.is(p.CommonFlags.EXPORT))&&this.compileNamespaceDeclaration(a);break;case d.NodeKind.VARIABLE:if(r||a.is(p.CommonFlags.EXPORT)){var s=this.compileVariableStatement(a,!0);s&&this.startFunctionBody.push(s)}break;default:assert(!1)}}},t.prototype.compileNamespace=function(e){var t,r;if(e.members){var n=this.options.noTreeShaking;try{for(var a=i(e.members.values()),s=a.next();!s.done;s=a.next()){var o=s.value;switch(o.kind){case u.ElementKind.CLASS_PROTOTYPE:!n&&!o.is(p.CommonFlags.EXPORT)||o.is(p.CommonFlags.GENERIC)||this.compileClassUsingTypeArguments(o,[]);break;case u.ElementKind.ENUM:this.compileEnum(o);break;case u.ElementKind.FUNCTION_PROTOTYPE:if((n||o.is(p.CommonFlags.EXPORT))&&!o.is(p.CommonFlags.GENERIC)){if(o.hasDecorator(u.DecoratorFlags.BUILTIN))break;this.compileFunctionUsingTypeArguments(o,[],null,null,o.declaration.name)}break;case u.ElementKind.GLOBAL:this.compileGlobal(o);break;case u.ElementKind.NAMESPACE:this.compileNamespace(o)}}}catch(e){t={error:e}}finally{try{s&&!s.done&&(r=a.return)&&r.call(a)}finally{if(t)throw t.error}}}},t.prototype.compileExportStatement=function(e){var t=this.program.fileLevelExports,r=e.members;if(r)for(var n=0,i=r.length;n<i;++n){var a=r[n],s=t.get(e.range.source.internalPath+p.PATH_DELIMITER+a.externalName.text);if(s)switch(s.kind){case u.ElementKind.CLASS_PROTOTYPE:s.is(p.CommonFlags.GENERIC)||this.compileClassUsingTypeArguments(s,[]);break;case u.ElementKind.ENUM:this.compileEnum(s);break;case u.ElementKind.FUNCTION_PROTOTYPE:!s.is(p.CommonFlags.GENERIC)&&e.range.source.isEntry&&this.compileFunctionUsingTypeArguments(s,[],null,null,s.declaration.name);break;case u.ElementKind.GLOBAL:this.compileGlobal(s);break;case u.ElementKind.NAMESPACE:this.compileNamespace(s)}}},t.prototype.compileClassDeclaration=function(e,t,r){void 0===r&&(r=null);var n=assert(this.program.elementsLookup.get(e.fileLevelInternalName));assert(n.kind==u.ElementKind.CLASS_PROTOTYPE),this.compileClassUsingTypeArguments(n,t,r,e)},t.prototype.compileClassUsingTypeArguments=function(e,t,r,n){void 0===r&&(r=null),void 0===n&&(n=null);var i=this.resolver.resolveClassInclTypeArguments(e,t,r,n||e.declaration);i&&this.compileClass(i)},t.prototype.compileClass=function(e){var t,r,n,a;if(e.is(p.CommonFlags.COMPILED))return!0;e.set(p.CommonFlags.COMPILED);var s=e.prototype.members;if(s)try{for(var o=i(s.values()),c=o.next();!c.done;c=o.next()){switch((m=c.value).kind){case u.ElementKind.GLOBAL:this.compileGlobal(m);break;case u.ElementKind.FUNCTION_PROTOTYPE:m.is(p.CommonFlags.GENERIC)||this.compileFunctionUsingTypeArguments(m,[],null,null,m.declaration.name);break;case u.ElementKind.PROPERTY:(g=m.getterPrototype)&&this.compileFunctionUsingTypeArguments(g,[],null,null,g.declaration.name),(y=m.setterPrototype)&&this.compileFunctionUsingTypeArguments(y,[],null,null,y.declaration.name)}}}catch(e){t={error:e}}finally{try{c&&!c.done&&(r=o.return)&&r.call(o)}finally{if(t)throw t.error}}var l=e.constructorInstance;l&&this.compileFunction(l);var h=e.members;if(h)try{for(var d=i(h.values()),_=d.next();!_.done;_=d.next()){var m;switch((m=_.value).kind){case u.ElementKind.FUNCTION_PROTOTYPE:m.is(p.CommonFlags.GENERIC)||this.compileFunctionUsingTypeArguments(m,[],e.contextualTypeArguments,null,m.declaration.name);break;case u.ElementKind.FIELD:m.set(p.CommonFlags.COMPILED);break;case u.ElementKind.PROPERTY:var g,y;(g=m.getterPrototype)&&this.compileFunctionUsingTypeArguments(g,[],e.contextualTypeArguments,null,g.declaration.name),(y=m.setterPrototype)&&this.compileFunctionUsingTypeArguments(y,[],e.contextualTypeArguments,null,y.declaration.name)}}}catch(e){n={error:e}}finally{try{_&&!_.done&&(a=d.return)&&a.call(d)}finally{if(n)throw n.error}}return!0},t.prototype.compileInterfaceDeclaration=function(e,t,r,n){void 0===r&&(r=null),void 0===n&&(n=null),this.error(c.DiagnosticCode.Operation_not_supported,e.range)},t.prototype.addMemorySegment=function(e,t){void 0===t&&(t=8);var r=i64_align(this.memoryOffset,t),n=l.MemorySegment.create(e,r);return this.memorySegments.push(n),this.memoryOffset=i64_add(r,i64_new(e.length,0)),n},t.prototype.ensureFunctionTableEntry=function(e){if(assert(e.is(p.CommonFlags.COMPILED)),e.functionTableIndex>=0)return e.functionTableIndex;var t=this.functionTable,r=t.length;return!e.is(p.CommonFlags.TRAMPOLINE)&&e.signature.requiredParameters<e.signature.parameterTypes.length&&(e=this.ensureTrampoline(e)),t.push(e.ref),e.functionTableIndex=r,r},t.prototype.compileStatement=function(e){var t,r=this.module;switch(e.kind){case d.NodeKind.BLOCK:t=this.compileBlockStatement(e);break;case d.NodeKind.BREAK:t=this.compileBreakStatement(e);break;case d.NodeKind.CONTINUE:t=this.compileContinueStatement(e);break;case d.NodeKind.DO:t=this.compileDoStatement(e);break;case d.NodeKind.EMPTY:t=this.compileEmptyStatement(e);break;case d.NodeKind.EXPRESSION:t=this.compileExpressionStatement(e);break;case d.NodeKind.FOR:t=this.compileForStatement(e);break;case d.NodeKind.IF:t=this.compileIfStatement(e);break;case d.NodeKind.RETURN:t=this.compileReturnStatement(e);break;case d.NodeKind.SWITCH:t=this.compileSwitchStatement(e);break;case d.NodeKind.THROW:t=this.compileThrowStatement(e);break;case d.NodeKind.TRY:t=this.compileTryStatement(e);break;case d.NodeKind.VARIABLE:(t=this.compileVariableStatement(e))||(t=r.createNop());break;case d.NodeKind.VOID:t=this.compileVoidStatement(e);break;case d.NodeKind.WHILE:t=this.compileWhileStatement(e);break;case d.NodeKind.TYPEDECLARATION:if(this.currentFunction==this.startFunctionInstance)return r.createNop();default:assert(!1),t=r.createUnreachable()}return this.options.sourceMap&&this.addDebugLocation(t,e.range),t},t.prototype.compileStatements=function(e){var t=e.length,r=new Array(t);r.length=0;for(var n=this.currentFunction.flow,i=0;i<t;++i){var a=this.compileStatement(e[i]);switch(l.getExpressionId(a)){case l.ExpressionId.Block:if(!l.getBlockName(a)){for(var s=0,o=l.getBlockChildCount(a);s<o;++s)r.push(l.getBlockChild(a,s));break}default:r.push(a);case l.ExpressionId.Nop:}if(n.isAny(29)){l.needsExplicitUnreachable(a)&&r.push(this.module.createUnreachable());break}}return r},t.prototype.compileBlockStatement=function(e){var t=e.statements,r=this.currentFunction.flow,n=r.fork();this.currentFunction.flow=n;var i=this.compileStatements(t),a=0==i.length?this.module.createNop():1==i.length?i[0]:this.module.createBlock(null,i,l.getExpressionType(i[i.length-1]));return this.currentFunction.flow=n.free(),r.inherit(n),a},t.prototype.compileBreakStatement=function(e){var t=this.module;if(e.label)return this.error(c.DiagnosticCode.Operation_not_supported,e.label.range),t.createUnreachable();var r=this.currentFunction.flow,n=r.breakLabel;return null==n?(this.error(c.DiagnosticCode.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement,e.range),t.createUnreachable()):(r.set(8),t.createBreak(n))},t.prototype.compileContinueStatement=function(e){var t=this.module,r=e.label;if(r)return this.error(c.DiagnosticCode.Operation_not_supported,r.range),t.createUnreachable();var n=this.currentFunction.flow,i=n.continueLabel;return null==i?(this.error(c.DiagnosticCode.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement,e.range),t.createUnreachable()):(n.set(16),t.createBreak(i))},t.prototype.compileDoStatement=function(e){var t=this.currentFunction,r=this.module,n=t.enterBreakContext(),i=t.flow,a=i.fork();t.flow=a;var s="break|"+n;a.breakLabel=s;var o="continue|"+n;a.continueLabel=o;var c=this.compileStatement(e.statement),l=this.makeIsTrueish(this.compileExpression(e.condition,_.Type.i32,0,0),this.currentType);t.flow=a.free(),t.leaveBreakContext();var p=a.isAny(29);a.unset(792),i.inherit(a);var u=[r.createLoop(o,p?c:r.createBlock(null,[c,r.createBreak(o,l)],0))];return p&&u.push(r.createUnreachable()),r.createBlock(s,u)},t.prototype.compileEmptyStatement=function(e){return this.module.createNop()},t.prototype.compileExpressionStatement=function(e){var t=this.compileExpression(e.expression,_.Type.void,0,0);return this.currentType!=_.Type.void&&(t=this.module.createDrop(t),this.currentType=_.Type.void),t},t.prototype.compileForStatement=function(e){var t=this.currentFunction,r=t.enterBreakContext(),n=t.flow,i=n.fork();t.flow=i;var a=i.breakLabel="break|"+r;i.breakLabel=a;var s="continue|"+r;i.continueLabel=s;var o="repeat|"+r,c=this.module,p=e.initializer?this.compileStatement(e.initializer):0,u=0,h=!1;if(e.condition){u=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType);var m=c.precomputeExpression(u);l.getExpressionId(m)==l.ExpressionId.Const&&(assert(1==l.getExpressionType(m)),0!=l.getConstValueI32(m)&&(h=!0)),u=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType)}else u=c.createI32(1),h=!0;var g=e.incrementor?this.compileExpression(e.incrementor,_.Type.void,1,0):0,y=e.statement,E=y.kind==d.NodeKind.BLOCK&&1==y.statements.length?this.compileStatement(y.statements[0]):this.compileStatement(y);t.flow=i.free(),t.leaveBreakContext();var f=i.isAny(528);i.unset(792),h?n.inherit(i):n.inheritConditional(i);var T=new Array;p&&T.push(p);var I=new Array;return f?I.push(c.createBlock(s,[c.createBreak(a,c.createUnary(l.UnaryOp.EqzI32,u)),E],0)):(I.push(c.createBreak(a,c.createUnary(l.UnaryOp.EqzI32,u))),I.push(E)),g&&I.push(g),I.push(c.createBreak(o)),T.push(c.createLoop(o,c.createBlock(null,I,0))),c.createBlock(a,T)},t.prototype.compileIfStatement=function(e){var t=this.module,r=this.currentFunction,n=e.ifTrue,i=e.ifFalse,a=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType);if(!this.options.noTreeShaking||this.currentFunction.isAny(p.CommonFlags.GENERIC|p.CommonFlags.GENERIC_CONTEXT)){var s=t.precomputeExpression(a);if(l.getExpressionId(s)==l.ExpressionId.Const&&1==l.getExpressionType(s))return l.getConstValueI32(s)?this.compileStatement(n):i?this.compileStatement(i):t.createNop();a=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType)}var o=r.flow,c=o.fork();r.flow=c;var u=this.compileStatement(n);r.flow=c.free();var h=0;if(i){var d=o.fork();r.flow=d,h=this.compileStatement(i),r.flow=d.free(),o.inheritMutual(c,d)}else o.inheritConditional(c);return t.createIf(a,u,h)},t.prototype.compileReturnStatement=function(e){var t=this.module,r=this.currentFunction,n=0,i=r.flow;if(i.set(1),e.value){var a=i.returnType;if(a==_.Type.void)return this.compileExpressionRetainType(e.value,a,0),this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,e.value.range,this.currentType.toString(),a.toString()),this.currentType=_.Type.void,t.createUnreachable();n=this.compileExpression(e.value,a,1,r.is(p.CommonFlags.MODULE_EXPORT)?1:0),i.canOverflow(n,a)||i.set(2)}return d.isLastStatement(e)?n||t.createNop():i.is(2048)?t.createBreak(assert(i.returnLabel),0,n):t.createReturn(n)},t.prototype.compileSwitchStatement=function(e){var t=this.module,r=this.currentFunction,n=e.cases,i=n.length;if(!i)return this.compileExpression(e.condition,_.Type.void,1,0);var a=r.enterBreakContext(),s=r.flow,o=r.getTempLocal(_.Type.u32,!1),c=o.index,p=new Array(1+i);p[0]=t.createSetLocal(c,this.compileExpression(e.condition,_.Type.u32,1,0));for(var u=1,h=-1,d=0;d<i;++d){var m=n[d].label;m?p[u++]=t.createBreak("case"+d.toString(10)+"|"+a,t.createBinary(l.BinaryOp.EqI32,t.createGetLocal(c,1),this.compileExpression(m,_.Type.u32,1,0))):h=d}r.freeTempLocal(o),p[u]=t.createBreak((h>=0?"case"+h.toString(10):"break")+"|"+a);var g=t.createBlock("case0|"+a,p,0),y=!0,E=!0,f=!0,T=!0;for(d=0;d<i;++d){var I=n[d].statements,v=I.length,A=s.fork();r.flow=A;var C="break|"+a;A.breakLabel=C;var N=d==i-1,O=N?C:"case"+(d+1).toString(10)+"|"+a,S=new Array(1+v);S[0]=g;for(var L=1,b=!1,k=0;k<v;++k){var R=this.compileStatement(I[k]);if(l.getExpressionId(R)!=l.ExpressionId.Nop&&(S[L++]=R,A.isAny(29))){b=!0;break}}S.length=L,(b||N)&&(A.is(1)||(y=!1),A.is(2)||(E=!1),A.is(4)||(f=!1),A.is(32)||(T=!1)),A.unset(264),r.flow=A.free(),g=t.createBlock(O,S,0)}return r.leaveBreakContext(),h>=0&&(y&&s.set(1),E&&s.set(2),f&&s.set(4),T&&s.set(32)),g},t.prototype.compileThrowStatement=function(e){var t=this.currentFunction.flow;return t.set(4),t.set(1),o.compileAbort(this,null,e)},t.prototype.compileTryStatement=function(e){return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()},t.prototype.compileVariableStatement=function(e,t){void 0===t&&(t=!1);var r=this.program,n=this.currentFunction,i=e.declarations,a=i.length;if(t||n==this.startFunctionInstance&&e.parent&&e.parent.kind==d.NodeKind.SOURCE){for(var s=0;s<a;++s)this.compileGlobalDeclaration(i[s]);return 0}var o=new Array,h=this.currentFunction.flow,m=this.resolver;for(s=0;s<a;++s){var g=i[s],y=g.name.text,E=null,f=0;if(g.type){if(!(E=m.resolveType(g.type,h.contextualTypeArguments)))continue;g.initializer&&(f=this.compileExpression(g.initializer,E,1,0))}else{if(!g.initializer){this.error(c.DiagnosticCode.Type_expected,g.name.range.atEnd);continue}if(f=this.compileExpressionRetainType(g.initializer,_.Type.void,0),this.currentType==_.Type.void){this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,g.range,this.currentType.toString(),"<auto>");continue}E=this.currentType}var T=!1;if(g.is(p.CommonFlags.CONST))if(f)if(f=this.module.precomputeExpression(f),l.getExpressionId(f)==l.ExpressionId.Const){var I=new u.Local(r,y,-1,E);switch(l.getExpressionType(f)){case 1:I=I.withConstantIntegerValue(i64_new(l.getConstValueI32(f),0));break;case 2:I=I.withConstantIntegerValue(i64_new(l.getConstValueI64Low(f),l.getConstValueI64High(f)));break;case 3:I=I.withConstantFloatValue(l.getConstValueF32(f));break;case 4:I=I.withConstantFloatValue(l.getConstValueF64(f));break;default:return assert(!1),this.module.createUnreachable()}var v=n.flow.scopedLocals;if(v){if(v.has(y))return this.error(c.DiagnosticCode.Duplicate_identifier_0,g.name.range,y),this.module.createUnreachable()}else n.flow.scopedLocals=v=new Map;v.set(y,I),T=!0}else this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,g.range);else this.error(c.DiagnosticCode._const_declarations_must_be_initialized,g.range);if(!T){I=void 0;I=g.isAny(p.CommonFlags.LET|p.CommonFlags.CONST)||h.is(2048)?h.addScopedLocal(E,y,!1,g):n.addLocal(E,y,g),f?(o.push(this.compileAssignmentWithValue(g.name,f)),I.type.is(36)&&h.setLocalWrapped(I.index,!h.canOverflow(f,E))):I.type.is(36)&&h.setLocalWrapped(I.index,!0)}}return o.length?1==o.length?o[0]:this.module.createBlock(null,o,0):0},t.prototype.compileVoidStatement=function(e){return this.compileExpression(e.expression,_.Type.void,2,0)},t.prototype.compileWhileStatement=function(e){var t=this.module,r=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType);if(!this.options.noTreeShaking||this.currentFunction.isAny(p.CommonFlags.GENERIC|p.CommonFlags.GENERIC_CONTEXT)){var n=t.precomputeExpression(r);if(l.getExpressionId(n)==l.ExpressionId.Const&&1==l.getExpressionType(n)){if(!l.getConstValueI32(n))return t.createNop()}else r=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType)}var i=this.currentFunction,a=i.enterBreakContext(),s=i.flow,o=s.fork();i.flow=o;var c="break|"+a;o.breakLabel=c;var u="continue|"+a;o.continueLabel=u;var h=this.compileStatement(e.statement),d=o.isAny(29);return i.flow=o.free(),i.leaveBreakContext(),o.unset(792),s.inheritConditional(o),t.createBlock(c,[t.createLoop(u,t.createIf(r,d?h:t.createBlock(null,[h,t.createBreak(u)],0)))])},t.prototype.compileInlineConstant=function(e,t,r){assert(e.is(p.CommonFlags.INLINED));var n=e.type;switch(!r&&n.is(4)&&t.is(4)&&n.size<t.size?(this.currentType=t).kind:(this.currentType=n).kind){case 0:case 1:var i=n.computeSmallIntegerShift(_.Type.i32);return this.module.createI32(1==e.constantValueKind?i64_low(e.constantIntegerValue)<<i>>i:0);case 5:case 6:case 10:var a=e.type.computeSmallIntegerMask(_.Type.i32);return this.module.createI32(1==e.constantValueKind?i64_low(e.constantIntegerValue)&a:0);case 2:case 7:return this.module.createI32(1==e.constantValueKind?i64_low(e.constantIntegerValue):0);case 4:case 9:if(!e.program.options.isWasm64)return this.module.createI32(1==e.constantValueKind?i64_low(e.constantIntegerValue):0);case 3:case 8:return 1==e.constantValueKind?this.module.createI64(i64_low(e.constantIntegerValue),i64_high(e.constantIntegerValue)):this.module.createI64(0);case 12:if(!e.hasDecorator(u.DecoratorFlags.BUILTIN)||t!=_.Type.f32)return this.module.createF64(e.constantFloatValue);this.currentType=_.Type.f32;case 11:return this.module.createF32(e.constantFloatValue);default:return assert(!1),this.module.createUnreachable()}},t.prototype.compileExpression=function(e,t,r,n){var i;switch(this.currentType=t,e.kind){case d.NodeKind.ASSERTION:i=this.compileAssertionExpression(e,t);break;case d.NodeKind.BINARY:i=this.compileBinaryExpression(e,t);break;case d.NodeKind.CALL:i=this.compileCallExpression(e,t);break;case d.NodeKind.COMMA:i=this.compileCommaExpression(e,t);break;case d.NodeKind.ELEMENTACCESS:i=this.compileElementAccessExpression(e,t);break;case d.NodeKind.FUNCTION:i=this.compileFunctionExpression(e,t);break;case d.NodeKind.IDENTIFIER:case d.NodeKind.FALSE:case d.NodeKind.NULL:case d.NodeKind.THIS:case d.NodeKind.SUPER:case d.NodeKind.TRUE:i=this.compileIdentifierExpression(e,t,0==r);break;case d.NodeKind.INSTANCEOF:i=this.compileInstanceOfExpression(e,t);break;case d.NodeKind.LITERAL:i=this.compileLiteralExpression(e,t);break;case d.NodeKind.NEW:i=this.compileNewExpression(e,t);break;case d.NodeKind.PARENTHESIZED:i=this.compileParenthesizedExpression(e,t);break;case d.NodeKind.PROPERTYACCESS:i=this.compilePropertyAccessExpression(e,t,0==r);break;case d.NodeKind.TERNARY:i=this.compileTernaryExpression(e,t);break;case d.NodeKind.UNARYPOSTFIX:i=this.compileUnaryPostfixExpression(e,t);break;case d.NodeKind.UNARYPREFIX:i=this.compileUnaryPrefixExpression(e,t);break;default:this.error(c.DiagnosticCode.Operation_not_supported,e.range),i=this.module.createUnreachable()}var a=this.currentType;return 0!=r&&a!=t?(i=this.convertExpression(i,a,t,r,n,e),this.currentType=t):1==n&&(i=this.ensureSmallIntegerWrap(i,a)),this.options.sourceMap&&this.addDebugLocation(i,e.range),i},t.prototype.compileExpressionRetainType=function(e,t,r){return this.compileExpression(e,t==_.Type.void?_.Type.i32:t,0,r)},t.prototype.precomputeExpression=function(e,t,r,n){return this.module.precomputeExpression(this.compileExpression(e,t,r,n))},t.prototype.convertExpression=function(e,t,r,n,i,a){assert(0!=n);var s=this.module;return 13==t.kind?(assert(13!=r.kind),this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,a.range,t.toString(),r.toString()),s.createUnreachable()):13==r.kind?s.createDrop(e):(t.isAssignableTo(r)||1==n&&this.error(c.DiagnosticCode.Conversion_from_type_0_to_1_requires_an_explicit_cast,a.range,t.toString(),r.toString()),t.is(8)?r.is(8)?11==t.kind?12==r.kind&&(e=s.createUnary(l.UnaryOp.PromoteF32,e)):11==r.kind&&(e=s.createUnary(l.UnaryOp.DemoteF64,e)):r.is(4)?e=11==t.kind?r.is(1)?r.is(64)?s.createUnary(l.UnaryOp.TruncF32ToI64,e):s.createUnary(l.UnaryOp.TruncF32ToI32,e):r.is(64)?s.createUnary(l.UnaryOp.TruncF32ToU64,e):s.createUnary(l.UnaryOp.TruncF32ToU32,e):r.is(1)?r.is(64)?s.createUnary(l.UnaryOp.TruncF64ToI64,e):s.createUnary(l.UnaryOp.TruncF64ToI32,e):r.is(64)?s.createUnary(l.UnaryOp.TruncF64ToU64,e):s.createUnary(l.UnaryOp.TruncF64ToU32,e):(assert(0==r.flags,"void type expected"),e=s.createDrop(e)):t.is(4)&&r.is(8)?e=11==r.kind?t.is(64)?s.createUnary(t.is(1)?l.UnaryOp.ConvertI64ToF32:l.UnaryOp.ConvertU64ToF32,e):s.createUnary(t.is(1)?l.UnaryOp.ConvertI32ToF32:l.UnaryOp.ConvertU32ToF32,e):t.is(64)?s.createUnary(t.is(1)?l.UnaryOp.ConvertI64ToF64:l.UnaryOp.ConvertU64ToF64,e):s.createUnary(t.is(1)?l.UnaryOp.ConvertI32ToF64:l.UnaryOp.ConvertU32ToF64,e):t.is(64)?r.is(64)||(e=s.createUnary(l.UnaryOp.WrapI64,e)):r.is(64)?(e=s.createUnary(r.is(1)?l.UnaryOp.ExtendI32:l.UnaryOp.ExtendU32,this.ensureSmallIntegerWrap(e,t)),i=0):t.is(32)&&t.size<r.size&&(e=this.ensureSmallIntegerWrap(e,t),i=0),this.currentType=r,1==i?this.ensureSmallIntegerWrap(e,r):e)},t.prototype.compileAssertionExpression=function(e,t){var r=this.resolver.resolveType(e.toType,this.currentFunction.flow.contextualTypeArguments);return r?this.compileExpression(e.expression,r,2,0):this.module.createUnreachable()},t.prototype.compileBinaryExpression=function(e,t){var r,n,i,a,s,o,p=this.module,d=e.left,m=e.right,g=!1,y=e.operator;switch(y){case h.Token.LESSTHAN:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.LT)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"<",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.LtI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.LtI64,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.LtI64:l.BinaryOp.LtI32,r,i);break;case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.LtU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.LtU64:l.BinaryOp.LtU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.LtU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.LtF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.LtF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.GREATERTHAN:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.GT)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,">",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.GtI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.GtI64:l.BinaryOp.GtI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.GtI64,r,i);break;case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.GtU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.GtU64:l.BinaryOp.GtU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.GtU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.GtF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.GtF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.LESSTHAN_EQUALS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.LE)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"<=",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.LeI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.LeI64:l.BinaryOp.LeI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.LeI64,r,i);break;case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.LeU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.LeU64:l.BinaryOp.LeU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.LeU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.LeF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.LeF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.GREATERTHAN_EQUALS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.GE)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,">=",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.GeI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.GeI64:l.BinaryOp.GeI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.GeI64,r,i);break;case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.GeU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.GeU64:l.BinaryOp.GeU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.GeU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.GeF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.GeF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.EQUALS_EQUALS_EQUALS:case h.Token.EQUALS_EQUALS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,y==h.Token.EQUALS_EQUALS&&this.currentType.is(256))if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.EQ)){o=this.compileBinaryOverload(v,d,r,m,e);break}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,h.operatorTokenToString(e.operator),n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.EqI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.EqI64:l.BinaryOp.EqI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.EqI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.EqF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.EqF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.EXCLAMATION_EQUALS_EQUALS:case h.Token.EXCLAMATION_EQUALS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,y==h.Token.EXCLAMATION_EQUALS&&this.currentType.is(256))if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.NE)){o=this.compileBinaryOverload(v,d,r,m,e);break}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,h.operatorTokenToString(e.operator),n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.NeI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.NeI64:l.BinaryOp.NeI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.NeI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.NeF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.NeF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.EQUALS:return this.compileAssignment(d,m,t);case h.Token.PLUS_EQUALS:g=!0;case h.Token.PLUS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.ADD)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0);else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"+",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:case 2:case 7:o=p.createBinary(l.BinaryOp.AddI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.AddI64:l.BinaryOp.AddI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.AddI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.AddF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.AddF64,r,i);break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.MINUS_EQUALS:g=!0;case h.Token.MINUS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.SUB)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"-",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:case 2:case 7:o=p.createBinary(l.BinaryOp.SubI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.SubI64:l.BinaryOp.SubI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.SubI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.SubF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.SubF64,r,i);break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.ASTERISK_EQUALS:g=!0;case h.Token.ASTERISK:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.MUL)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,1);else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"*",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:case 2:case 7:o=p.createBinary(l.BinaryOp.MulI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.MulI64:l.BinaryOp.MulI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.MulI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.MulF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.MulF64,r,i);break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.ASTERISK_ASTERISK_EQUALS:g=!0;case h.Token.ASTERISK_ASTERISK:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.POW)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}var E=void 0;if(11==this.currentType.kind){if(i=this.compileExpression(m,_.Type.f32,1,0),a=this.currentType,!(E=this.f32PowInstance)){if(!(f=this.program.elementsLookup.get("Mathf"))){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Mathf"),o=p.createUnreachable();break}if(!(T=f.members?f.members.get("pow"):null)){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Mathf.pow"),o=p.createUnreachable();break}assert(T.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.f32PowInstance=E=this.resolver.resolveFunction(T,null)}}else if(r=this.convertExpression(r,this.currentType,_.Type.f64,1,0,d),n=this.currentType,i=this.compileExpression(m,_.Type.f64,1,0),a=this.currentType,!(E=this.f64PowInstance)){if(!(f=this.program.elementsLookup.get("Math"))){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Math"),o=p.createUnreachable();break}if(!(T=f.members?f.members.get("pow"):null)){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Math.pow"),o=p.createUnreachable();break}assert(T.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.f64PowInstance=E=this.resolver.resolveFunction(T,null)}o=E&&this.compileFunction(E)?this.makeCallDirect(E,[r,i]):p.createUnreachable();break;case h.Token.SLASH_EQUALS:g=!0;case h.Token.SLASH:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.DIV)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,1),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"/",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m)}switch(this.currentType.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.DivI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.DivI64:l.BinaryOp.DivI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.DivI64,r,i);break;case 5:case 6:case 10:case 7:o=p.createBinary(l.BinaryOp.DivU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.DivU64:l.BinaryOp.DivU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.DivU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.DivF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.DivF64,r,i);break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.PERCENT_EQUALS:g=!0;case h.Token.PERCENT:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.REM)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,1),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"%",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m)}switch(this.currentType.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.RemI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.RemI64:l.BinaryOp.RemI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.RemI64,r,i);break;case 5:case 6:case 10:case 7:o=p.createBinary(l.BinaryOp.RemU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.RemU64:l.BinaryOp.RemU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.RemU64,r,i);break;case 11:if(!(E=this.f32ModInstance)){if(!(f=this.program.elementsLookup.get("Mathf"))){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Mathf"),o=p.createUnreachable();break}if(!(T=f.members?f.members.get("mod"):null)){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Mathf.mod"),o=p.createUnreachable();break}assert(T.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.f32ModInstance=E=this.resolver.resolveFunction(T,null)}o=E&&this.compileFunction(E)?this.makeCallDirect(E,[r,i]):p.createUnreachable();break;case 12:if(!(E=this.f64ModInstance)){var f,T;if(!(f=this.program.elementsLookup.get("Math"))){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Math"),o=p.createUnreachable();break}if(!(T=f.members?f.members.get("mod"):null)){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Math.mod"),o=p.createUnreachable();break}assert(T.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.f64ModInstance=E=this.resolver.resolveFunction(T,null)}o=E&&this.compileFunction(E)?this.makeCallDirect(E,[r,i]):p.createUnreachable();break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.LESSTHAN_LESSTHAN_EQUALS:g=!0;case h.Token.LESSTHAN_LESSTHAN:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_SHL)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}switch(i=this.compileExpression(m,n,1,0),a=this.currentType,this.currentType.kind){case 0:case 1:case 5:case 6:case 10:case 2:case 7:o=p.createBinary(l.BinaryOp.ShlI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.ShlI64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.ShlI64:l.BinaryOp.ShlI32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.GREATERTHAN_GREATERTHAN_EQUALS:g=!0;case h.Token.GREATERTHAN_GREATERTHAN:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_SHR)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}switch(r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,1),a=this.currentType,this.currentType.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.ShrI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.ShrI64,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.ShrI64:l.BinaryOp.ShrI32,r,i);break;case 5:case 6:case 10:case 7:o=p.createBinary(l.BinaryOp.ShrU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.ShrU64,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.ShrU64:l.BinaryOp.ShrU32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:g=!0;case h.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_SHR_U)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}switch(r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,0),a=this.currentType,this.currentType.kind){case 5:case 6:case 10:o=p.createBinary(l.BinaryOp.ShrU32,r,i);case 0:case 1:case 2:case 7:o=p.createBinary(l.BinaryOp.ShrU32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.ShrU64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.ShrU64:l.BinaryOp.ShrU32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.AMPERSAND_EQUALS:g=!0;case h.Token.AMPERSAND:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_AND)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"&",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 2:case 5:case 6:case 10:case 7:o=p.createBinary(l.BinaryOp.AndI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.AndI64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.AndI64:l.BinaryOp.AndI32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.BAR_EQUALS:g=!0;case h.Token.BAR:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_OR)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"|",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:o=p.createBinary(l.BinaryOp.OrI32,r,i);break;case 2:case 7:o=p.createBinary(l.BinaryOp.OrI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.OrI64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.OrI64:l.BinaryOp.OrI32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.CARET_EQUALS:g=!0;case h.Token.CARET:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){var I,v;if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_XOR)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"^",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:o=p.createBinary(l.BinaryOp.XorI32,r,i);break;case 2:case 7:o=p.createBinary(l.BinaryOp.XorI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.XorI64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.XorI64:l.BinaryOp.XorI32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.AMPERSAND_AMPERSAND:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,i=this.compileExpression(m,n,1,0),a=this.currentType,o=p.cloneExpression(r,!0,0))this.makeIsTrueish(r,this.currentType),o=p.createIf(this.makeIsTrueish(r,this.currentType),i,o);else{var A=this.currentFunction.flow,C=this.currentFunction.getAndFreeTempLocal(this.currentType,!A.canOverflow(r,this.currentType));o=p.createIf(this.makeIsTrueish(p.createTeeLocal(C.index,r),this.currentType),i,p.createGetLocal(assert(C).index,this.currentType.toNativeType()))}break;case h.Token.BAR_BAR:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,i=this.compileExpression(m,n,1,0),a=this.currentType,o=this.module.cloneExpression(r,!0,0))o=this.module.createIf(this.makeIsTrueish(r,this.currentType),o,i);else{A=this.currentFunction.flow,C=this.currentFunction.getAndFreeTempLocal(this.currentType,!A.canOverflow(r,this.currentType));o=p.createIf(this.makeIsTrueish(p.createTeeLocal(C.index,r),this.currentType),p.createGetLocal(assert(C).index,this.currentType.toNativeType()),i)}break;default:assert(!1),o=this.module.createUnreachable()}return g?this.compileAssignmentWithValue(d,o,t!=_.Type.void):o},t.prototype.compileUnaryOverload=function(e,t,r,n){var i,a=0;return e.is(p.CommonFlags.INSTANCE)?(a=r,i=[]):i=[t],this.compileCallDirect(e,i,n,a,e.hasDecorator(u.DecoratorFlags.INLINE))},t.prototype.compileBinaryOverload=function(e,t,r,n,i){var a,s=0;if(e.is(p.CommonFlags.INSTANCE)){var o=assert(e.parent);assert(o.kind==u.ElementKind.CLASS),s=r,a=[n]}else a=[t,n];return this.compileCallDirect(e,a,i,s,e.hasDecorator(u.DecoratorFlags.INLINE))},t.prototype.compileAssignment=function(e,t,r){var n,i=this.program.resolver,a=this.currentFunction,s=i.resolveExpression(e,a);if(!s)return this.module.createUnreachable();switch(s.kind){case u.ElementKind.GLOBAL:if(!this.compileGlobal(s))return this.module.createUnreachable();assert(s.type!=_.Type.void);case u.ElementKind.LOCAL:case u.ElementKind.FIELD:n=s.type;break;case u.ElementKind.PROPERTY:var o=s.setterPrototype;if(o){var l=this.resolver.resolveFunction(o,null);if(!l)return this.module.createUnreachable();assert(1==l.signature.parameterTypes.length),n=l.signature.parameterTypes[0];break}return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,s.internalName),this.module.createUnreachable();case u.ElementKind.CLASS:if(i.currentElementExpression){var p=a.flow.is(4096),h=s.lookupOverload(u.OperatorKind.INDEXED_SET,p);if(!h)return s.lookupOverload(u.OperatorKind.INDEXED_GET,p)?this.error(c.DiagnosticCode.Index_signature_in_type_0_only_permits_reading,e.range,s.internalName):this.error(c.DiagnosticCode.Index_signature_is_missing_in_type_0,e.range,s.internalName),this.module.createUnreachable();assert(2==h.signature.parameterTypes.length),n=h.signature.parameterTypes[1];break}default:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}assert(n!=_.Type.void);var d=this.compileExpression(t,n,1,0);return this.compileAssignmentWithValue(e,d,r!=_.Type.void)},t.prototype.compileAssignmentWithValue=function(e,t,r){void 0===r&&(r=!1);var n=this.module,i=this.resolver.resolveExpression(e,this.currentFunction);if(!i)return n.createUnreachable();switch(i.kind){case u.ElementKind.LOCAL:var a=i.type;if(assert(a!=_.Type.void),this.currentType=r?a:_.Type.void,i.is(p.CommonFlags.CONST))return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,i.internalName),n.createUnreachable();var s=this.currentFunction.flow;return a.is(36)&&s.setLocalWrapped(i.index,!s.canOverflow(t,a)),r?n.createTeeLocal(i.index,t):n.createSetLocal(i.index,t);case u.ElementKind.GLOBAL:if(!this.compileGlobal(i))return n.createUnreachable();a=i.type;if(assert(a!=_.Type.void),this.currentType=r?a:_.Type.void,i.is(p.CommonFlags.CONST))return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,i.internalName),n.createUnreachable();if(t=this.ensureSmallIntegerWrap(t,a),r){var o=a.toNativeType(),l=i.internalName;return n.createBlock(null,[n.createSetGlobal(l,t),n.createGetGlobal(l,o)],o)}return n.createSetGlobal(i.internalName,t);case u.ElementKind.FIELD:var h=i.declaration;if(i.is(p.CommonFlags.READONLY)&&!this.currentFunction.is(p.CommonFlags.CONSTRUCTOR)&&null!=h&&null==h.initializer)return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,i.internalName),n.createUnreachable();var d=assert(this.resolver.currentThisExpression),m=this.compileExpressionRetainType(d,this.options.usizeType,0);a=i.type;this.currentType=r?a:_.Type.void;o=a.toNativeType();if(10==a.kind&&(t=this.ensureSmallIntegerWrap(t,a)),r){s=(L=this.currentFunction).flow;var g=L.getAndFreeTempLocal(a,!s.canOverflow(t,a)).index;return n.createBlock(null,[n.createSetLocal(g,t),n.createStore(a.byteSize,m,n.createGetLocal(g,o),o,i.memoryOffset),n.createGetLocal(g,o)],o)}return n.createStore(a.byteSize,m,t,o,i.memoryOffset);case u.ElementKind.PROPERTY:var y=i.setterPrototype;if(y){var E=this.resolver.resolveFunction(y,null);if(!E)return n.createUnreachable();if(!r){if(E.is(p.CommonFlags.INSTANCE)){d=assert(this.resolver.currentThisExpression),m=this.compileExpressionRetainType(d,this.options.usizeType,0);return this.makeCallDirect(E,[m,t])}return this.makeCallDirect(E,[t])}var f=i.getterPrototype;assert(null!=f);var T=this.resolver.resolveFunction(f,null);if(!T)return n.createUnreachable();var I=(R=T.signature.returnType).toNativeType();if(E.is(p.CommonFlags.INSTANCE)){d=assert(this.resolver.currentThisExpression),m=this.compileExpressionRetainType(d,this.options.usizeType,0),g=this.currentFunction.getAndFreeTempLocal(R,!1).index;return n.createBlock(null,[this.makeCallDirect(E,[n.createTeeLocal(g,m),t]),this.makeCallDirect(T,[n.createGetLocal(g,I)])],I)}return n.createBlock(null,[this.makeCallDirect(E,[t]),this.makeCallDirect(T)],I)}return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,i.internalName),n.createUnreachable();case u.ElementKind.CLASS:var v=this.resolver.currentElementExpression;if(v){var A=this.currentFunction.flow.is(4096),C=i.lookupOverload(u.OperatorKind.INDEXED_GET,A);if(!C)return this.error(c.DiagnosticCode.Index_signature_is_missing_in_type_0,e.range,i.internalName),n.createUnreachable();var N=i.lookupOverload(u.OperatorKind.INDEXED_SET,A);if(!N)return this.error(c.DiagnosticCode.Index_signature_in_type_0_only_permits_reading,e.range,i.internalName),this.currentType=r?C.signature.returnType:_.Type.void,n.createUnreachable();var O=i.type,S=(d=assert(this.resolver.currentThisExpression),m=this.compileExpressionRetainType(d,this.options.usizeType,0),this.compileExpression(v,_.Type.i32,1,0));if(r){var L,b=(L=this.currentFunction).getTempLocal(O,!1),k=L.getAndFreeTempLocal(this.currentType,!1),R=C.signature.returnType;return this.currentFunction.freeTempLocal(b),n.createBlock(null,[this.makeCallDirect(N,[n.createTeeLocal(b.index,m),n.createTeeLocal(k.index,S),t]),this.makeCallDirect(C,[n.createGetLocal(b.index,b.type.toNativeType()),n.createGetLocal(k.index,k.type.toNativeType())])],R.toNativeType())}return this.makeCallDirect(N,[m,S,t])}}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()},t.prototype.compileCallExpression=function(e,t){var r,n,i=this.module,a=this.currentFunction,s=this.resolver.resolveExpression(e.expression,a);if(!s)return i.createUnreachable();switch(s.kind){case u.ElementKind.FUNCTION_PROTOTYPE:var o=s,l=e.typeArguments;if(o.hasDecorator(u.DecoratorFlags.BUILTIN))return this.compileCallExpressionBuiltin(o,e,t);var h=null;if(l){if(!o.is(p.CommonFlags.GENERIC))return this.error(c.DiagnosticCode.Type_0_is_not_generic,e.expression.range,o.internalName),i.createUnreachable();h=this.resolver.resolveFunctionInclTypeArguments(o,l,this.currentFunction.flow.contextualTypeArguments,e)}else{if(o.is(p.CommonFlags.GENERIC)){for(var m=new Map,g=assert(o.declaration.typeParameters),y=g.length,E=0;E<y;++E)m.set(g[E].name.text,null);var f=o.declaration.signature.parameters,T=f.length,I=e.arguments,v=I.length,A=new Array(v);for(E=0;E<T;++E){var C=f[E].type,N=C.kind==d.NodeKind.TYPE?C.name.text:null,O=E<v?I[E]:o.declaration.signature.parameters[E].initializer;if(!O)return this.error(c.DiagnosticCode.Expected_0_arguments_but_got_1,e.range,T.toString(10),v.toString(10)),i.createUnreachable();if(null!==N&&m.has(N)){if(k=m.get(N)){A[E]=this.compileExpressionRetainType(O,k,0);var S=void 0;if(!(S=_.Type.commonCompatible(k,this.currentType,!0))&&!(S=_.Type.commonCompatible(k,this.currentType,!1)))return this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,f[E].type.range,this.currentType.toString(),k.toString()),i.createUnreachable();k=S}else A[E]=this.compileExpressionRetainType(O,_.Type.i32,0),k=this.currentType;m.set(N,k)}else{var L=this.resolver.resolveType(f[E].type,this.currentFunction.flow.contextualTypeArguments);if(!L)return i.createUnreachable();A[E]=this.compileExpression(O,L,1,0)}}var b=new Array(y);for(E=0;E<y;++E){var k=assert(m.get(g[E].name.text));b[E]=k}return(h=this.resolver.resolveFunction(o,b,this.currentFunction.flow.contextualTypeArguments))?this.makeCallDirect(h,A):this.module.createUnreachable()}h=this.resolver.resolveFunction(o,null,this.currentFunction.flow.contextualTypeArguments)}if(!h)return this.module.createUnreachable();var R=0;return h.is(p.CommonFlags.INSTANCE)&&(R=this.compileExpressionRetainType(assert(this.resolver.currentThisExpression),this.options.usizeType,0)),this.compileCallDirect(h,e.arguments,e,R,h.hasDecorator(u.DecoratorFlags.INLINE));case u.ElementKind.LOCAL:if(r=s.type.signatureReference){n=s.is(p.CommonFlags.INLINED)?i.createI32(i64_low(s.constantIntegerValue)):i.createGetLocal(s.index,1);break}return this.error(c.DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,e.range,s.type.toString()),i.createUnreachable();case u.ElementKind.GLOBAL:if(r=s.type.signatureReference){n=i.createGetGlobal(s.internalName,s.type.toNativeType());break}return this.error(c.DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,e.range,s.type.toString()),i.createUnreachable();case u.ElementKind.FIELD:if(r=(F=s.type).signatureReference){var x=assert(this.resolver.currentThisExpression);R=this.compileExpressionRetainType(x,this.options.usizeType,0);n=i.createLoad(4,!1,R,1,s.memoryOffset);break}return this.error(c.DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,e.range,F.toString()),i.createUnreachable();case u.ElementKind.FUNCTION_TARGET:r=s.signature,n=this.compileExpression(e.expression,s.type,1,0);break;case u.ElementKind.PROPERTY:var F;if(n=this.compileGetter(s,e.expression),!(r=(F=this.currentType).signatureReference))return this.error(c.DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,e.range,F.toString()),i.createUnreachable();break;default:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable()}return this.compileCallIndirect(r,n,e.arguments,e)},t.prototype.compileCallExpressionBuiltin=function(e,t,r){var n=null,i=t.typeArguments;t.typeArguments&&(e.is(p.CommonFlags.GENERIC)||this.error(c.DiagnosticCode.Type_0_is_not_generic,t.range,e.internalName),n=this.resolver.resolveTypeArguments(assert(e.declaration.typeParameters),i,this.currentFunction.flow.contextualTypeArguments,t));var a=o.compileCall(this,e,n,t.arguments,r,t);return a||(this.error(c.DiagnosticCode.Operation_not_supported,t.range),this.module.createUnreachable())},t.prototype.checkCallSignature=function(e,t,r,n){if(r!=(null!=e.thisType))return this.error(c.DiagnosticCode.Operation_not_supported,n.range),!1;var i=e.hasRest;if(i)return this.error(c.DiagnosticCode.Operation_not_supported,n.range),!1;var a=e.requiredParameters,s=e.parameterTypes.length;return t<a?(this.error(a<s?c.DiagnosticCode.Expected_at_least_0_arguments_but_got_1:c.DiagnosticCode.Expected_0_arguments_but_got_1,n.range,a.toString(),t.toString()),!1):!(t>s&&!i)||(this.error(c.DiagnosticCode.Expected_0_arguments_but_got_1,n.range,s.toString(),t.toString()),!1)},t.prototype.compileCallDirect=function(e,t,r,n,i){void 0===n&&(n=0),void 0===i&&(i=!1);var a=t.length,s=e.signature;if(!this.checkCallSignature(s,a,0!=n,r))return this.module.createUnreachable();if(i){if(assert(!e.is(p.CommonFlags.TRAMPOLINE)),!this.currentInlineFunctions.includes(e)){this.currentInlineFunctions.push(e);var o=this.compileCallInlineUnchecked(e,t,r,n);return this.currentInlineFunctions.pop(),o}this.warning(c.DiagnosticCode.Function_0_cannot_be_inlined_into_itself,r.range,e.internalName)}var l=n?a+1:a,u=new Array(l),h=0;n&&(u[0]=n,h=1);for(var d=s.parameterTypes,_=0;_<a;++_,++h)u[h]=this.compileExpression(t[_],d[_],1,0);return assert(h==l),this.makeCallDirect(e,u)},t.prototype.compileCallInlineUnchecked=function(e,t,r,n){var a,s;void 0===n&&(n=0);var o=t.length,h=e.signature,m=this.currentFunction,g=this.module,y=e.prototype.declaration,E=m.flow,f=e.internalName+"|inlined."+(e.nextInlineId++).toString(10),T=e.signature.returnType,I=u.Flow.create(m);I.set(2048),I.returnLabel=f,I.returnType=T,I.contextualTypeArguments=e.contextualTypeArguments;var v=[];if(n){var A=assert(e.parent);if(assert(A.kind==u.ElementKind.CLASS),l.getExpressionId(n)==l.ExpressionId.GetLocal)I.addScopedLocalAlias(l.getGetLocalIndex(n),A.type,"this");else{var C=I.addScopedLocal(A.type,"this",!1);v.push(g.createSetLocal(C.index,n))}}for(var N=h.parameterTypes,O=0;O<o;++O){var S=this.compileExpression(t[O],N[O],1,0);if(l.getExpressionId(S)==l.ExpressionId.GetLocal)I.addScopedLocalAlias(l.getGetLocalIndex(S),N[O],h.getParameterName(O));else{var L=I.addScopedLocal(N[O],h.getParameterName(O),!I.canOverflow(S,N[O]));v.push(g.createSetLocal(L.index,S))}}m.flow=I;var b=h.parameterTypes.length;for(O=o;O<b;++O){var k=this.compileExpression(assert(y.signature.parameters[O].initializer),N[O],1,1);L=I.addScopedLocal(N[O],h.getParameterName(O),!I.canOverflow(k,N[O]));v.push(g.createSetLocal(L.index,k))}var R=assert(y.body);if(R.kind==d.NodeKind.BLOCK)for(var x=R.statements,F=(O=0,x.length);O<F;++O){var D=this.compileStatement(x[O]);if(l.getExpressionId(D)!=l.ExpressionId.Nop&&(v.push(D),I.isAny(29)))break}else v.push(this.compileStatement(R));var B=I.scopedLocals;if(B){try{for(var U=i(B.values()),P=U.next();!P.done;P=U.next()){var w=P.value;w.is(p.CommonFlags.SCOPED)&&m.freeTempLocal(w)}}catch(e){a={error:e}}finally{try{P&&!P.done&&(s=U.return)&&s.call(U)}finally{if(a)throw a.error}}I.scopedLocals=null}return I.finalize(),this.currentFunction.flow=E,this.currentType=T,T==_.Type.void||I.isAny(29)?g.createBlock(f,v,T.toNativeType()):(this.error(c.DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,y.signature.returnType.range),g.createUnreachable())},t.prototype.ensureTrampoline=function(e){var t=e.trampoline;if(t)return t;var r=e.signature,n=e.internalName,i=r.parameterTypes,a=e.prototype.declaration.signature.parameters,s=r.returnType,o=r.thisType,h=e.is(p.CommonFlags.INSTANCE),d=r.requiredParameters,m=d,g=i.length,y=g;h&&(++m,++y);var E=assert(y-m),f=new Array(m),T=0,I=this.module;h&&(f[0]=I.createGetLocal(0,this.options.nativeSizeType),T=1);for(var v=0;v<d;++v,++T)f[T]=I.createGetLocal(T,i[v].toNativeType());assert(T==m);var A=new _.Signature(i,s,o),C=n+"|trampoline";A.requiredParameters=g,(t=new u.Function(e.prototype,C,A,e.parent,e.contextualTypeArguments)).set(e.flags|p.CommonFlags.TRAMPOLINE|p.CommonFlags.COMPILED),e.trampoline=t;var N=this.currentFunction;this.currentFunction=t;var O=E+1,S=new Array(O),L="of"+E.toString(10);for(v=0;v<O;++v){var b=v.toString(10)+L;S[v]=b}var k=I.createBlock(S[0],[I.createBlock("outOfRange",[I.createSwitch(S,"outOfRange",d?I.createBinary(l.BinaryOp.SubI32,I.createGetGlobal("~argc",1),I.createI32(d)):I.createGetGlobal("~argc",1))]),I.createUnreachable()]);for(v=0;v<E;++v,++T){var R=i[d+v],x=a[d+v],F=x.initializer,D=void 0;F?D=I.createSetLocal(T,this.compileExpression(F,R,1,1)):(this.error(c.DiagnosticCode.Optional_parameter_must_have_an_initializer,x.range),D=I.createUnreachable()),k=I.createBlock(S[v+1],[k,D]),f[T]=I.createGetLocal(T,R.toNativeType())}this.currentFunction=N,assert(T==y);var B=I.addFunction(C,this.ensureFunctionType(A.parameterTypes,A.returnType,A.thisType),_.typesToNativeTypes(t.additionalLocals),I.createBlock(null,[k,I.createCall(n,f,s.toNativeType())],s.toNativeType()));return t.finalize(I,B),t},t.prototype.ensureArgcVar=function(){if(!this.argcVar){var e=this.module;this.argcVar=e.addGlobal("~argc",1,!0,e.createI32(0))}return"~argc"},t.prototype.ensureArgcSet=function(){if(!this.argcSet){var e=this.module;this.argcSet=e.addFunction("~setargc",this.ensureFunctionType([_.Type.u32],_.Type.void),null,e.createSetGlobal(this.ensureArgcVar(),e.createGetLocal(0,1))),e.addFunctionExport("~setargc","_setargc")}return"~setargc"},t.prototype.makeCallDirect=function(e,t){void 0===t&&(t=null);var r=t?t.length:0,n=r,i=e.signature.requiredParameters,a=e.signature.parameterTypes.length,s=a;e.is(p.CommonFlags.INSTANCE)&&(++i,++s,--n),assert(r>=i);var o=this.module;if(!this.compileFunction(e))return o.createUnreachable();var c=e.signature.returnType,l=e.is(p.CommonFlags.MODULE_IMPORT);if(r<s){t||((t=new Array(s)).length=0);for(var u=e.signature.parameterTypes,h=e.prototype.declaration.signature.parameters,_=!0,m=n;m<a;++m){var g=h[m].initializer;if(null===g||!d.nodeIsConstantValue(g.kind)){_=!1;break}}if(_)for(m=n;m<a;++m)t.push(this.compileExpression(h[m].initializer,u[m],1,0));else{for(m=n;m<a;++m)t.push(u[m].toNativeZero(o));if(!l){var y=e;if(e=this.ensureTrampoline(e),!this.compileFunction(e))return o.createUnreachable();e.flow.flags=y.flow.flags,this.program.instancesLookup.set(e.internalName,e);var E=c.toNativeType();return this.currentType=c,o.createBlock(null,[o.createSetGlobal(this.ensureArgcVar(),o.createI32(n)),o.createCall(e.internalName,t,E)],E)}}}return this.currentType=c,l?o.createCallImport(e.internalName,t,c.toNativeType()):o.createCall(e.internalName,t,c.toNativeType())},t.prototype.compileCallIndirect=function(e,t,r,n,i){void 0===i&&(i=0);var a=r.length;if(!this.checkCallSignature(e,a,0!=i,n))return this.module.createUnreachable();var s=i?a+1:a,o=new Array(s),c=0;i&&(o[0]=i,c=1);for(var l=e.parameterTypes,p=0;p<a;++p,++c)o[c]=this.compileExpression(r[p],l[p],1,0);return assert(c==s),this.makeCallIndirect(e,t,o)},t.prototype.makeCallIndirect=function(e,t,r){void 0===r&&(r=null);var n=r?r.length:0,i=n,a=e.requiredParameters,s=e.parameterTypes.length,o=s;e.thisType&&(++a,++o,--i),assert(n>=a),this.ensureFunctionType(e.parameterTypes,e.returnType,e.thisType);var c=this.module;if(n<o){r||((r=new Array(o)).length=0);for(var l=e.parameterTypes,p=i;p<s;++p)r.push(l[p].toNativeZero(c))}var u=e.returnType;return this.currentType=u,c.createBlock(null,[c.createSetGlobal(this.ensureArgcVar(),c.createI32(i)),c.createCallIndirect(t,r,e.toSignatureString())],u.toNativeType())},t.prototype.compileCommaExpression=function(e,t){for(var r=e.expressions,n=r.length,i=new Array(n--),a=0;a<n;++a)i[a]=this.compileExpression(r[a],_.Type.void,2,0);return i[n]=this.compileExpression(r[n],t,1,0),this.module.createBlock(null,i,this.currentType.toNativeType())},t.prototype.compileElementAccessExpression=function(e,t){var r=this.resolver.resolveElementAccess(e,this.currentFunction);if(!r)return this.module.createUnreachable();switch(r.kind){case u.ElementKind.CLASS:var n=this.currentFunction.flow.is(4096),i=r.lookupOverload(u.OperatorKind.INDEXED_GET,n);if(!i)return this.error(c.DiagnosticCode.Index_signature_is_missing_in_type_0,e.expression.range,r.internalName),this.module.createUnreachable();var a=this.compileExpression(e.expression,r.type,1,0);return this.compileCallDirect(i,[e.elementExpression],e,a)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()},t.prototype.compileFunctionExpression=function(e,t){var r=e.declaration,n=r.name,i=(n.text.length?n.text:"anonymous")+"|"+this.functionTable.length.toString(10),a=this.currentFunction,s=new u.FunctionPrototype(this.program,i,a.internalName+p.INNER_DELIMITER+i,r,null,u.DecoratorFlags.NONE),o=a.flow,c=this.compileFunctionUsingTypeArguments(s,[],o.contextualTypeArguments,o,r);if(!c)return this.module.createUnreachable();this.currentType=c.signature.type;var l=this.ensureFunctionTableEntry(c);return l<0?this.module.createUnreachable():this.module.createI32(l)},t.prototype.compileIdentifierExpression=function(e,t,r){var n=this.module,i=this.currentFunction;switch(e.kind){case d.NodeKind.NULL:var a=this.options;return t.classReference||(this.currentType=a.usizeType),a.isWasm64?n.createI64(0):n.createI32(0);case d.NodeKind.TRUE:return this.currentType=_.Type.bool,n.createI32(1);case d.NodeKind.FALSE:return this.currentType=_.Type.bool,n.createI32(0);case d.NodeKind.THIS:if((l=i.flow).is(2048))if(h=l.getScopedLocal("this"))return this.currentType=h.type,n.createGetLocal(h.index,h.type.toNativeType());if(i.is(p.CommonFlags.INSTANCE)){var s=assert(i.parent);assert(s.kind==u.ElementKind.CLASS);var o=s.type;return i.is(p.CommonFlags.CONSTRUCTOR)&&!l.is(32)?(l.set(32),this.currentType=o,n.createTeeLocal(0,this.makeConditionalAllocate(s,e))):(this.currentType=o,n.createGetLocal(0,o.toNativeType()))}return this.error(c.DiagnosticCode._this_cannot_be_referenced_in_current_location,e.range),this.currentType=this.options.usizeType,n.createUnreachable();case d.NodeKind.SUPER:var l,h;if((l=i.flow).is(2048))if(h=l.getScopedLocal("this"))if(m=assert(h.type.classReference).base)return this.currentType=m.type,n.createGetLocal(h.index,m.type.toNativeType());if(i.is(p.CommonFlags.INSTANCE)){var m;s=assert(i.parent);if(assert(s.kind==u.ElementKind.CLASS),m=s.base){var g=m.type;return this.currentType=g,n.createGetLocal(0,g.toNativeType())}}return this.error(c.DiagnosticCode._super_can_only_be_referenced_in_a_derived_class,e.range),this.currentType=this.options.usizeType,n.createUnreachable()}var y=this.resolver.resolveIdentifier(e,this.currentEnum||i);if(!y)return n.createUnreachable();switch(y.kind){case u.ElementKind.LOCAL:var E=y.type;if(assert(E!=_.Type.void),y.is(p.CommonFlags.INLINED))return this.compileInlineConstant(y,t,r);var f=y.index;return assert(f>=0),this.currentType=E,this.module.createGetLocal(f,E.toNativeType());case u.ElementKind.GLOBAL:if(!this.compileGlobal(y))return this.module.createUnreachable();var T=y.type;return assert(T!=_.Type.void),y.is(p.CommonFlags.INLINED)?this.compileInlineConstant(y,t,r):(this.currentType=T,this.module.createGetGlobal(y.internalName,T.toNativeType()));case u.ElementKind.ENUMVALUE:return y.is(p.CommonFlags.COMPILED)?(this.currentType=_.Type.i32,y.is(p.CommonFlags.INLINED)?this.module.createI32(y.constantValue):this.module.createGetGlobal(y.internalName,1)):(this.error(c.DiagnosticCode.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums,e.range),this.currentType=_.Type.i32,this.module.createUnreachable());case u.ElementKind.FUNCTION_PROTOTYPE:var I=this.resolver.resolveFunction(y,null,i.flow.contextualTypeArguments);if(!I||!this.compileFunction(I))return n.createUnreachable();var v=this.ensureFunctionTableEntry(I);return this.currentType=I.signature.type,this.module.createI32(v)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()},t.prototype.compileInstanceOfExpression=function(e,t){var r=this.module,n=this.compileExpressionRetainType(e.expression,this.options.usizeType,0),i=this.currentType,a=this.resolver.resolveType(e.isType);return this.currentType=_.Type.bool,a?i.is(512)&&!a.is(512)?i.nonNullableType.isAssignableTo(a)?r.createBinary(i.is(64)?l.BinaryOp.NeI64:l.BinaryOp.NeI32,n,i.toNativeZero(r)):r.createI32(0):r.createI32(i.isAssignableTo(a,!0)?1:0):r.createUnreachable()},t.prototype.compileLiteralExpression=function(e,t,r){void 0===r&&(r=!1);var n=this.module;switch(e.literalKind){case d.LiteralKind.ARRAY:assert(!r);var i=t.classReference;return i&&i.prototype==this.program.arrayPrototype?this.compileArrayLiteral(assert(i.typeArguments)[0],e.elementExpressions,!1,e):(this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable());case d.LiteralKind.FLOAT:var a=e.value;return r&&(a=-a),t==_.Type.f32?n.createF32(a):(this.currentType=_.Type.f64,n.createF64(a));case d.LiteralKind.INTEGER:var s=e.value;switch(r&&(s=i64_sub(i64_new(0),s)),t.kind){case 0:if(i64_is_i8(s))return n.createI32(i64_low(s));break;case 5:if(i64_is_u8(s))return n.createI32(i64_low(s));break;case 1:if(i64_is_i16(s))return n.createI32(i64_low(s));break;case 6:if(i64_is_u16(s))return n.createI32(i64_low(s));break;case 2:if(i64_is_i32(s))return n.createI32(i64_low(s));break;case 7:if(i64_is_u32(s))return n.createI32(i64_low(s));break;case 10:if(i64_is_bool(s))return n.createI32(i64_low(s));break;case 4:if(!this.options.isWasm64){if(i64_is_i32(s))return n.createI32(i64_low(s));break}return n.createI64(i64_low(s),i64_high(s));case 9:if(!this.options.isWasm64){if(i64_is_u32(s))return n.createI32(i64_low(s));break}return n.createI64(i64_low(s),i64_high(s));case 3:case 8:return n.createI64(i64_low(s),i64_high(s));case 11:if(i64_is_f32(s))return n.createF32(i64_to_f32(s));break;case 12:if(i64_is_f64(s))return n.createF64(i64_to_f64(s));break;case 13:break;default:return assert(!1),n.createUnreachable()}return i64_is_i32(s)?(this.currentType=_.Type.i32,n.createI32(i64_low(s))):i64_is_u32(s)?(this.currentType=_.Type.u32,n.createI32(i64_low(s))):(this.currentType=_.Type.i64,n.createI64(i64_low(s),i64_high(s)));case d.LiteralKind.STRING:return assert(!r),this.compileStringLiteral(e);case d.LiteralKind.OBJECT:return assert(!r),this.compileObjectLiteral(e,t)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.currentType=t,n.createUnreachable()},t.prototype.ensureStaticString=function(e){var t,r=this.program,n=r.hasGC,i=r.gcHeaderSize,a=assert(r.stringInstance),s=this.stringSegments;if(s.has(e))t=s.get(e);else{var c=e.length,l=a.currentMemoryOffset+1&-2,p=l+2*c,u=void 0,h=void 0;n?(u=new Uint8Array(i+p),h=i,m.writeI32(o.ensureGCHook(this,a),u,r.gcHookOffset)):(u=new Uint8Array(p),h=0),m.writeI32(c,u,h+a.offsetof("length")),h+=l;for(var d=0;d<c;++d)m.writeI16(e.charCodeAt(d),u,h+(d<<1));t=this.addMemorySegment(u),s.set(e,t)}var _=t.offset;return n&&(_=i64_add(_,i64_new(i))),this.currentType=a.type,this.options.isWasm64?this.module.createI64(i64_low(_),i64_high(_)):(assert(i64_is_u32(_)),this.module.createI32(i64_low(_)))},t.prototype.compileStringLiteral=function(e){return this.ensureStaticString(e.value)},t.prototype.ensureStaticArray=function(e,t){var r,n,i=this.program,a=i.hasGC,s=i.gcHeaderSize,c=t.length,p=e.byteSize,u=c*p,h=this.options.usizeType.byteSize,d=assert(i.arrayBufferInstance),_=d.currentMemoryOffset+7&-8,g=1<<32-clz(_+u-1);a?(r=new Uint8Array(s+g),n=s,m.writeI32(o.ensureGCHook(this,d),r,i.gcHookOffset)):(r=new Uint8Array(g),n=0),m.writeI32(u,r,n+d.offsetof("byteLength")),n+=_;var y=e.toNativeType();switch(y){case 1:switch(p){case 1:for(var E=0;E<c;++E){var f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeI8(l.getConstValueI32(f),r,n),n+=1}break;case 2:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeI16(l.getConstValueI32(f),r,n),n+=2}break;case 4:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeI32(l.getConstValueI32(f),r,n),n+=4}break;default:assert(!1)}break;case 2:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeI64(i64_new(l.getConstValueI64Low(f),l.getConstValueI64High(f)),r,n),n+=8}break;case 3:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeF32(l.getConstValueF32(f),r,n),n+=4}break;case 4:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeF64(l.getConstValueF64(f),r,n),n+=8}break;default:assert(!1)}var T=this.addMemorySegment(r).offset;a&&(T=i64_add(T,i64_new(s)));var I=assert(i.arrayPrototype),v=assert(this.resolver.resolveClass(I,[e])),A=v.currentMemoryOffset+7&-8;a?(r=new Uint8Array(s+A),n=s,m.writeI32(o.ensureGCHook(this,v),r,i.gcHookOffset)):(r=new Uint8Array(A),n=0);var C=this.addMemorySegment(r).offset;return a&&(C=i64_add(C,i64_new(s))),this.currentType=v.type,8==h?(m.writeI64(T,r,n+v.offsetof("buffer_")),m.writeI32(c,r,n+v.offsetof("length_")),this.module.createI64(i64_low(C),i64_high(C))):(assert(i64_is_u32(T)),m.writeI32(i64_low(T),r,n+v.offsetof("buffer_")),m.writeI32(c,r,n+v.offsetof("length_")),assert(i64_is_u32(C)),this.module.createI32(i64_low(C)))},t.prototype.compileArrayLiteral=function(e,t,r,n){for(var i=this.module,a=t.length,s=new Array(a),o=new Array(a),p=e.toNativeType(),h=!0,d=0;d<a;++d){var _=t[d]?this.compileExpression(t[d],e,1,0):e.toNativeZero(i);s[d]=_,h&&(_=i.precomputeExpression(s[d]),l.getExpressionId(_)==l.ExpressionId.Const?(assert(l.getExpressionType(_)==p),o[d]=_):(r&&this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,n.range),h=!1))}if(h)return this.ensureStaticArray(e,o);var m=assert(this.program.arrayPrototype);if(!m||m.kind!=u.ElementKind.CLASS_PROTOTYPE)return i.createUnreachable();var g=this.resolver.resolveClass(m,[e]);if(!g)return i.createUnreachable();var y=g.type;this.currentType=y;var E=g.lookupOverload(u.OperatorKind.INDEXED_SET,!0);if(!E)return this.error(c.DiagnosticCode.Index_signature_in_type_0_only_permits_reading,n.range,g.internalName),i.createUnreachable();var f=y.toNativeType(),T=this.currentFunction,I=T.getTempLocal(y,!1),v=new Array(2+a),A=0;v[A++]=i.createSetLocal(I.index,this.makeCallDirect(assert(g.constructorInstance),[i.createI32(0),i.createI32(a)]));for(d=0;d<a;++d)v[A++]=this.makeCallDirect(E,[i.createGetLocal(I.index,f),i.createI32(d),s[d]]);return assert(A+1==v.length),v[A]=i.createGetLocal(I.index,f),T.freeTempLocal(I),this.currentType=y,i.createBlock(null,v,f)},t.prototype.compileObjectLiteral=function(e,t){var r=this.module,n=t.classReference;if(!n||n.is(p.CommonFlags.ABSTRACT))return this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,e.range,"<object>",t.toString()),r.createUnreachable();var i=n.constructorInstance;if(i){if(i.signature.requiredParameters)return this.error(c.DiagnosticCode.Constructor_of_class_0_must_not_require_any_arguments,e.range,n.toString()),r.createUnreachable();if(i.is(p.CommonFlags.PRIVATE))return this.error(c.DiagnosticCode.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration,e.range,n.toString()),r.createUnreachable();if(i.is(p.CommonFlags.PROTECTED))return this.error(c.DiagnosticCode.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration,e.range,n.toString()),r.createUnreachable()}var a=e.names,s=a.length,l=e.values,h=n.members,d=!1,_=new Array(s+2),m=this.currentFunction.getTempLocal(this.options.usizeType);assert(s==l.length);for(var g=0,y=s;g<y;++g){var E=h?h.get(a[g].text):null;if(E&&E.kind==u.ElementKind.FIELD){var f=E.type;_[g+1]=this.module.createStore(f.byteSize,this.module.createGetLocal(m.index,this.options.nativeSizeType),this.compileExpression(l[g],E.type,1,0),f.toNativeType(),E.memoryOffset)}else this.error(c.DiagnosticCode.Property_0_does_not_exist_on_type_1,a[g].range,a[g].text,n.toString()),d=!0}return this.currentType=n.type.nonNullableType,d?r.createUnreachable():(_[0]=r.createSetLocal(m.index,o.compileAllocate(this,n,e)),_[_.length-1]=r.createGetLocal(m.index,this.options.nativeSizeType),r.createBlock(null,_,this.options.nativeSizeType))},t.prototype.compileNewExpression=function(e,t){var r=this.module,n=this.options,i=this.currentFunction,a=this.resolver.resolveExpression(e.expression,i);if(!a)return r.createUnreachable();if(a.kind!=u.ElementKind.CLASS_PROTOTYPE)return this.error(c.DiagnosticCode.Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature,e.expression.range),this.module.createUnreachable();var s,o,l=a,h=null,d=e.typeArguments;if(!(h=!d&&null!==(s=t.classReference)&&s.is(p.CommonFlags.GENERIC)?this.resolver.resolveClass(l,s.typeArguments,i.flow.contextualTypeArguments):this.resolver.resolveClassInclTypeArguments(l,d,i.flow.contextualTypeArguments,e)))return r.createUnreachable();var _=h,m=null;do{if(m=_.constructorInstance)break}while(_=_.base);return o=m?this.compileCallDirect(m,e.arguments,e,n.usizeType.toNativeZero(r)):this.makeAllocate(h,e),this.currentType=h.type,o},t.prototype.compileParenthesizedExpression=function(e,t){return this.compileExpression(e.expression,t,0,0)},t.prototype.compilePropertyAccessExpression=function(e,t,r){var n=this.module,i=this.resolver.resolvePropertyAccess(e,this.currentFunction);if(!i)return n.createUnreachable();switch(i.kind){case u.ElementKind.GLOBAL:if(!this.compileGlobal(i))return n.createUnreachable();var a=i.type;return assert(a!=_.Type.void),i.is(p.CommonFlags.INLINED)?this.compileInlineConstant(i,t,r):(this.currentType=a,n.createGetGlobal(i.internalName,a.toNativeType()));case u.ElementKind.ENUMVALUE:var s=i.parent;return assert(null!==s&&s.kind==u.ElementKind.ENUM),this.compileEnum(s)?(this.currentType=_.Type.i32,i.is(p.CommonFlags.INLINED)?n.createI32(i.constantValue):n.createGetGlobal(i.internalName,1)):(this.currentType=_.Type.i32,this.module.createUnreachable());case u.ElementKind.FIELD:var o=assert(this.resolver.currentThisExpression);assert(i.memoryOffset>=0);var l=this.compileExpressionRetainType(o,this.options.usizeType,0);return this.currentType=i.type,n.createLoad(i.type.byteSize,i.type.is(5),l,i.type.toNativeType(),i.memoryOffset);case u.ElementKind.PROPERTY:return this.compileGetter(i,e);case u.ElementKind.FUNCTION_PROTOTYPE:return this.error(c.DiagnosticCode.Cannot_access_method_0_without_calling_it_as_it_requires_this_to_be_set,e.range,i.simpleName),n.createUnreachable()}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()},t.prototype.compileGetter=function(e,t){var r=e.getterPrototype;if(r){var n=this.resolver.resolveFunction(r,null);if(!n)return this.module.createUnreachable();var i=n.signature;if(!this.checkCallSignature(i,0,n.is(p.CommonFlags.INSTANCE),t))return this.module.createUnreachable();var a=0!=(n.decoratorFlags&u.DecoratorFlags.INLINE);if(n.is(p.CommonFlags.INSTANCE)){var s=assert(n.parent);assert(s.kind==u.ElementKind.CLASS);var o=assert(this.resolver.currentThisExpression),l=this.compileExpressionRetainType(o,this.options.usizeType,0);//!!!
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Map([["i8",l.Type.i8],["i16",l.Type.i16],["i32",l.Type.i32],["i64",l.Type.i64],["isize",e.isizeType],["u8",l.Type.u8],["u16",l.Type.u16],["u32",l.Type.u32],["u64",l.Type.u64],["usize",e.usizeType],["bool",l.Type.bool],["f32",l.Type.f32],["f64",l.Type.f64],["void",l.Type.void],["number",l.Type.f64],["boolean",l.Type.bool]]),this.setConstantInteger("ASC_TARGET",l.Type.i32,i64_new(e.isWasm64?2:1)),this.setConstantInteger("ASC_NO_TREESHAKING",l.Type.bool,i64_new(e.noTreeShaking?1:0,0)),this.setConstantInteger("ASC_NO_ASSERT",l.Type.bool,i64_new(e.noAssert?1:0,0)),this.setConstantInteger("ASC_MEMORY_BASE",l.Type.i32,i64_new(e.memoryBase,0)),this.setConstantInteger("ASC_OPTIMIZE_LEVEL",l.Type.i32,i64_new(e.optimizeLevelHint,0)),this.setConstantInteger("ASC_SHRINK_LEVEL",l.Type.i32,i64_new(e.shrinkLevelHint,0)),this.setConstantInteger("ASC_FEATURE_MUTABLE_GLOBAL",l.Type.bool,i64_new(e.hasFeature(2)?1:0,0)),this.setConstantInteger("ASC_FEATURE_SIGN_EXTENSION",l.Type.bool,i64_new(e.hasFeature(1)?1:0,0));for(var u=new Array,h=new Map,d=new Array,_=new Array,m=0,g=this.sources.length;m<g;++m){var E=this.sources[m],f=new A(this,E);this.elementsLookup.set(f.internalName,f),this.currentFilespace=f;for(var T=E.statements,I=0,v=T.length;I<v;++I){var C=T[I];switch(C.kind){case p.NodeKind.CLASSDECLARATION:this.initializeClass(C,d,_);break;case p.NodeKind.ENUMDECLARATION:this.initializeEnum(C);break;case p.NodeKind.EXPORT:this.initializeExports(C,h);break;case p.NodeKind.FUNCTIONDECLARATION:this.initializeFunction(C);break;case p.NodeKind.IMPORT:this.initializeImports(C,h,u);break;case p.NodeKind.INTERFACEDECLARATION:this.initializeInterface(C);break;case p.NodeKind.NAMESPACEDECLARATION:this.initializeNamespace(C,d,_);break;case p.NodeKind.TYPEDECLARATION:this.initializeTypeAlias(C);break;case p.NodeKind.VARIABLE:this.initializeVariables(C)}}}for(m=0;m<u.length;){var N=u[m];if(X=N.declaration)(x=this.tryLocateImport(N.externalName,h))?(this.elementsLookup.set(N.localName,x),u.splice(m,1)):(x=this.tryLocateImport(N.externalNameAlt,h))?(this.elementsLookup.set(N.localName,x),u.splice(m,1)):(this.error(c.DiagnosticCode.Module_0_has_no_exported_member_1,X.range,X.parent.path.value,X.externalName.text),++m);else(x=this.elementsLookup.get(N.externalName))?(this.elementsLookup.set(N.localName,x),u.splice(m,1)):(x=this.elementsLookup.get(N.externalNameAlt))?(this.elementsLookup.set(N.localName,x),u.splice(m,1)):(assert(!1),++m)}try{for(var O=i(h),S=O.next();!S.done;S=O.next()){var L=a(S.value,2),b=L[0],k=L[1],R=k,x=void 0;do{if(!R.isReExport){(x=this.elementsLookup.get(R.externalName))||(x=this.elementsLookup.get(R.member.name.text))?this.setExportAndCheckLibrary(b,x,k.member.externalName):this.error(c.DiagnosticCode.Cannot_find_name_0,k.member.range,k.member.name.text);break}if(x=this.fileLevelExports.get(R.externalName)){this.setExportAndCheckLibrary(b,x,k.member.externalName);break}(R=h.get(R.externalName))||this.error(c.DiagnosticCode.Module_0_has_no_exported_member_1,k.member.externalName.range,k.member.parent.path.value,k.member.externalName.text)}while(R)}}catch(e){t={error:e}}finally{try{S&&!S.done&&(r=O.return)&&r.call(O)}finally{if(t)throw t.error}}var F=this.resolver;for(m=0,g=d.length;m<g;++m){var D=d[m],B=D.declaration,U=assert(B.extendsType),P=F.resolveIdentifier(U.name,null);if(P)if(P.kind==y.CLASS_PROTOTYPE){var w=P;D.basePrototype=w}else this.error(c.DiagnosticCode.A_class_may_only_extend_another_class,U.range)}var M=e.globalAliases;if(M)try{for(var G=i(M),K=G.next();!K.done;K=G.next()){var z=a(K.value,2),H=z[0],V=z[1];if(V.length){if(!(x=this.elementsLookup.get(V)))throw new Error("element not found: "+V);this.elementsLookup.set(H,x)}}}catch(e){n={error:e}}finally{try{K&&!K.done&&(s=G.return)&&s.call(G)}finally{if(n)throw n.error}}if(this.elementsLookup.has("ArrayBuffer")){x=assert(this.elementsLookup.get("ArrayBuffer"));assert(x.kind==y.CLASS_PROTOTYPE),this.arrayBufferInstance=F.resolveClass(x,null)}if(this.elementsLookup.has("Array")){x=assert(this.elementsLookup.get("Array"));assert(x.kind==y.CLASS_PROTOTYPE),this.arrayPrototype=x}if(this.elementsLookup.has("String")){x=assert(this.elementsLookup.get("String"));if(assert(x.kind==y.CLASS_PROTOTYPE),W=F.resolveClass(x,null))if(this.typesLookup.has("string")){var X=x.declaration;this.error(c.DiagnosticCode.Duplicate_identifier_0,X.name.range,X.programLevelInternalName)}else this.stringInstance=W,this.typesLookup.set("string",W.type)}x=assert(this.elementsLookup.get("start"));(assert(x.kind==y.FUNCTION_PROTOTYPE),this.startFunction=x,this.moduleLevelExports.has("main"))&&((x=this.moduleLevelExports.get("main").element).kind!=y.FUNCTION_PROTOTYPE||x.isAny(o.CommonFlags.GENERIC|o.CommonFlags.AMBIENT)||(x.set(o.CommonFlags.MAIN),this.mainFunction=x));if(this.elementsLookup.has("abort")){x=this.elementsLookup.get("abort");assert(x.kind==y.FUNCTION_PROTOTYPE),(W=this.resolver.resolveFunction(x,null))&&(this.abortInstance=W)}if(this.elementsLookup.has("memory")){var W,Y=(x=this.elementsLookup.get("memory")).members;if(Y)if(Y.has("allocate"))x=assert(Y.get("allocate")),assert(x.kind==y.FUNCTION_PROTOTYPE),(W=this.resolver.resolveFunction(x,null))&&(this.memoryAllocateInstance=W)}if(this.elementsLookup.has("__gc_allocate")&&this.elementsLookup.has("__gc_link")&&this.elementsLookup.has("__gc_mark")){x=this.elementsLookup.get("__gc_allocate");assert(x.kind==y.FUNCTION_PROTOTYPE);var Q=assert(this.resolver.resolveFunction(x,null)),q=Q.signature;assert(2==q.parameterTypes.length),assert(q.parameterTypes[0]==this.options.usizeType),assert(q.parameterTypes[1].signatureReference),assert(q.returnType==this.options.usizeType),x=this.elementsLookup.get("__gc_link"),assert(x.kind==y.FUNCTION_PROTOTYPE);var j=assert(this.resolver.resolveFunction(x,null));q=j.signature,assert(2==q.parameterTypes.length),assert(q.parameterTypes[0]==this.options.usizeType),assert(q.parameterTypes[1]==this.options.usizeType),assert(q.returnType==l.Type.void),x=this.elementsLookup.get("__gc_mark"),assert(x.kind==y.FUNCTION_PROTOTYPE);var Z=assert(this.resolver.resolveFunction(x,null));q=Z.signature,assert(1==q.parameterTypes.length),assert(q.parameterTypes[0]==this.options.usizeType),assert(q.returnType==l.Type.void),this.gcAllocateInstance=Q,this.gcLinkInstance=j,this.gcMarkInstance=Z;var J=2*e.usizeType.byteSize;this.gcHookOffset=J,this.gcHeaderSize=J+4+7&-8,this.hasGC=!0}},t.prototype.setConstantInteger=function(e,t,r){assert(t.is(4)),this.elementsLookup.set(e,new L(this,e,e,t,null,E.NONE).withConstantIntegerValue(r))},t.prototype.setConstantFloat=function(e,t,r){assert(t.is(8)),this.elementsLookup.set(e,new L(this,e,e,t,null,E.NONE).withConstantFloatValue(r))},t.prototype.tryLocateImport=function(e,t){for(var r,n=this.fileLevelExports;;){if(r=n.get(e))return r;var i=t.get(e);if(!i)break;if(!i.isReExport)return this.elementsLookup.get(i.externalName);e=i.externalName}return null},t.prototype.checkDecorators=function(e,t){for(var r=E.NONE,n=0,i=e.length;n<i;++n){var a=e[n],s=I(p.decoratorNameToKind(a.name));s&&(s==E.BUILTIN?a.range.source.isLibrary?r|=s:this.error(c.DiagnosticCode.Decorator_0_is_not_valid_here,a.range,a.name.range.toString()):t&s?r&s?this.error(c.DiagnosticCode.Duplicate_decorator,a.range,a.name.range.toString()):r|=s:this.error(c.DiagnosticCode.Decorator_0_is_not_valid_here,a.range,a.name.range.toString()))}return r},t.prototype.checkGlobal=function(e,t){var r=t.parent;if(e.hasDecorator(E.GLOBAL)||t.range.source.isLibrary&&e.is(o.CommonFlags.EXPORT)&&(assert(r).kind==p.NodeKind.SOURCE||r.kind==p.NodeKind.VARIABLE&&assert(r.parent).kind==p.NodeKind.SOURCE)){var n=t.programLevelInternalName;this.elementsLookup.has(n)?this.error(c.DiagnosticCode.Duplicate_identifier_0,t.name.range,e.internalName):this.elementsLookup.set(n,e)}e.hasDecorator(E.BUILTIN)&&(e.internalName=t.programLevelInternalName)},t.prototype.initializeClass=function(e,t,r,n){void 0===n&&(n=null);var i=e.fileLevelInternalName;if(this.elementsLookup.has(i))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,i);else{var a=e.decorators,s=e.name.text,l=new P(this,s,i,e,a?this.checkDecorators(a,E.GLOBAL|E.SEALED|E.UNMANAGED):E.NONE);l.parent=n,this.elementsLookup.set(i,l);var u=e.implementsTypes;if(u){var h=u.length;if(l.hasDecorator(E.UNMANAGED))h&&this.error(c.DiagnosticCode.Unmanaged_classes_cannot_implement_interfaces,p.Range.join(e.name.range,u[h-1].range));else if(h){for(var d=0;d<h;++d)this.warning(c.DiagnosticCode.Operation_not_supported,u[d].range);r.push(l)}}if(e.extendsType&&t.push(l),n){if(n.members){if(n.members.has(s))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,i)}else n.members=new Map;n.members.set(s,l),n.is(o.CommonFlags.MODULE_EXPORT)&&l.is(o.CommonFlags.EXPORT)&&l.set(o.CommonFlags.MODULE_EXPORT)}else if(l.is(o.CommonFlags.EXPORT)){if(this.fileLevelExports.has(i))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,i);if(this.fileLevelExports.set(i,l),this.currentFilespace.members.set(s,l),l.is(o.CommonFlags.EXPORT)&&e.range.source.isEntry){if(this.moduleLevelExports.has(s)){var _=this.moduleLevelExports.get(s);return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,_.element.internalName)}l.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(s,{element:l,identifier:e.name})}}for(var m=e.members,g=(d=0,m.length);d<g;++d){var y=m[d];switch(y.kind){case p.NodeKind.FIELDDECLARATION:this.initializeField(y,l);break;case p.NodeKind.METHODDECLARATION:y.isAny(o.CommonFlags.GET|o.CommonFlags.SET)?this.initializeAccessor(y,l):this.initializeMethod(y,l);break;default:return void assert(!1)}}this.checkGlobal(l,e)}},t.prototype.initializeField=function(e,t){var r=e.name.text,n=e.fileLevelInternalName,i=e.decorators,a=t.kind==y.INTERFACE_PROTOTYPE;if(e.is(o.CommonFlags.STATIC)){if(a&&assert(!1),this.elementsLookup.has(n))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n);if(t.members){if(t.members.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;var s=new L(this,r,n,l.Type.void,e,i?this.checkDecorators(i,E.INLINE):E.NONE);s.parent=t,t.members.set(r,s),this.elementsLookup.set(n,s),t.is(o.CommonFlags.MODULE_EXPORT)&&s.set(o.CommonFlags.MODULE_EXPORT),s.hasDecorator(E.INLINE)&&!s.is(o.CommonFlags.READONLY)&&this.error(c.DiagnosticCode.Decorator_0_is_not_valid_here,assert(p.findDecorator(p.DecoratorKind.INLINE,i)).range,"inline")}else{if(a&&assert(!e.isAny(o.CommonFlags.ABSTRACT|o.CommonFlags.GET|o.CommonFlags.SET)),t.instanceMembers){if(t.instanceMembers.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.instanceMembers=new Map;var u=new D(t,r,n,e);i&&this.checkDecorators(i,E.NONE),t.instanceMembers.set(r,u)}},t.prototype.initializeMethod=function(e,t){var r=e.name.text,n=e.fileLevelInternalName,i=null,a=e.decorators,s=E.NONE;if(a&&(s=this.checkDecorators(a,E.OPERATOR_BINARY|E.OPERATOR_PREFIX|E.OPERATOR_POSTFIX|E.INLINE)),e.is(o.CommonFlags.STATIC)){if(assert(e.name.kind!=p.NodeKind.CONSTRUCTOR),this.elementsLookup.has(n))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n);if(t.members){if(t.members.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;i=new R(this,r,n,e,t,s),t.members.set(r,i),this.elementsLookup.set(n,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)}else{if(t.instanceMembers){if(t.instanceMembers.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.instanceMembers=new Map;i=new R(this,r,n,e,t,s),e.name.kind==p.NodeKind.CONSTRUCTOR?t.constructorPrototype?this.error(c.DiagnosticCode.Multiple_constructor_implementations_are_not_allowed,e.name.range):(i.set(o.CommonFlags.CONSTRUCTOR),t.constructorPrototype=i):t.instanceMembers.set(r,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)}this.checkOperatorOverloads(e.decorators,i,t)},t.prototype.checkOperatorOverloads=function(e,t,r){if(e)for(var n=0,i=e.length;n<i;++n){var a=e[n];switch(a.decoratorKind){case p.DecoratorKind.OPERATOR:case p.DecoratorKind.OPERATOR_BINARY:case p.DecoratorKind.OPERATOR_PREFIX:case p.DecoratorKind.OPERATOR_POSTFIX:var o=a.arguments&&a.arguments.length||0;if(1==o){var l=a.arguments[0];if(l.kind==p.NodeKind.LITERAL&&l.literalKind==p.LiteralKind.STRING){var u=g(a.decoratorKind,l.value);if(u==s.INVALID)this.error(c.DiagnosticCode.Operation_not_supported,l.range);else{var h=r.overloadPrototypes;h.has(u)?this.error(c.DiagnosticCode.Duplicate_function_implementation,l.range):(t.operatorKind=u,h.set(u,t))}}else this.error(c.DiagnosticCode.String_literal_expected,l.range)}else this.error(c.DiagnosticCode.Expected_0_arguments_but_got_1,a.range,"1",o.toString(0))}}},t.prototype.initializeAccessor=function(e,t){var r=e.name.text,n=e.fileLevelInternalName,i=this.elementsLookup.get(n),a=e.is(o.CommonFlags.GET),s=!1;if(i){if(i.kind!=y.PROPERTY||null!=(a?i.getterPrototype:i.setterPrototype))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else i=new U(this,r,n,t),s=!0;var l=e.decorators,p=E.NONE;l&&(p=this.checkDecorators(l,E.INLINE));var u=(a?o.GETTER_PREFIX:o.SETTER_PREFIX)+r;if(e.is(o.CommonFlags.STATIC)){var h=t.internalName+o.STATIC_DELIMITER+u;if(this.elementsLookup.has(h))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,h);var d=new R(this,u,h,e,null,p);if(a?i.getterPrototype=d:i.setterPrototype=d,s){if(t.members){if(t.members.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,h)}else t.members=new Map;t.members.set(r,i)}else assert(t.members&&t.members.has(r));this.elementsLookup.set(n,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)}else{var _=t.internalName+o.INSTANCE_DELIMITER+u;if(t.instanceMembers){if(t.instanceMembers.has(u))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.instanceMembers=new Map;var m=new R(this,u,_,e,t,p);a?i.getterPrototype=m:i.setterPrototype=m,t.instanceMembers.set(u,i),this.elementsLookup.set(n,i),t.is(o.CommonFlags.MODULE_EXPORT)&&(i.set(o.CommonFlags.MODULE_EXPORT),m.set(o.CommonFlags.MODULE_EXPORT))}},t.prototype.initializeEnum=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.name.text,i=new N(this,n,r,e);if(i.parent=t,this.elementsLookup.set(r,i),t){if(t.members){if(t.members.has(n))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.is(o.CommonFlags.EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)}else if(i.is(o.CommonFlags.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,i),this.currentFilespace.members.set(n,i),e.range.source.isEntry){if(this.moduleLevelExports.has(n)){var a=this.moduleLevelExports.get(n);return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,a.element.internalName)}i.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(n,{element:i,identifier:e.name})}}for(var s=e.values,l=0,p=s.length;l<p;++l)this.initializeEnumValue(s[l],i);this.checkGlobal(i,e)}},t.prototype.initializeEnumValue=function(e,t){var r=e.name.text,n=e.fileLevelInternalName;if(t.members){if(t.members.has(r))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;var i=new O(t,this,r,n,e);t.members.set(r,i),t.is(o.CommonFlags.MODULE_EXPORT)&&i.set(o.CommonFlags.MODULE_EXPORT)},t.prototype.initializeExports=function(e,t){var r=e.members;if(r)for(var n=0,i=r.length;n<i;++n)this.initializeExport(r[n],e.internalPath,t);else this.error(c.DiagnosticCode.Operation_not_supported,e.range)},t.prototype.setExportAndCheckLibrary=function(e,t,r){this.fileLevelExports.set(e,t);var n=r.range.source.internalPath,i=o.FILESPACE_PREFIX+n,a=this.elementsLookup.get(i);a||(a=assert(this.elementsLookup.get(i+o.PATH_DELIMITER+"index"))),assert(a.kind==y.FILESPACE);var s=r.text;a.members.set(s,t);var l=r.range.source;l.isLibrary?this.elementsLookup.has(s)?this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,r.range,s):(t.internalName=s,this.elementsLookup.set(s,t)):l.isEntry&&this.moduleLevelExports.set(r.text,{element:t,identifier:r})},t.prototype.initializeExport=function(e,t,r){var n,i,a,s=e.range.source.internalPath+o.PATH_DELIMITER+e.externalName.text;if(this.fileLevelExports.has(s))this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,s);else if(null==t){if(n=e.range.source.internalPath+o.PATH_DELIMITER+e.name.text,this.elementsLookup.has(n))return void this.setExportAndCheckLibrary(s,this.elementsLookup.get(n),e.externalName);if(r.has(s))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,s);(a=new _).isReExport=!1,a.externalName=n,a.member=e,r.set(s,a)}else{if(n=t+o.PATH_DELIMITER+e.name.text,i=this.elementsLookup.get(n))return void this.setExportAndCheckLibrary(s,i,e.externalName);for(var l=new Set;a=r.get(n);){if(!a.isReExport){if(i=this.elementsLookup.get(a.externalName))return void this.setExportAndCheckLibrary(s,i,e.externalName);break}if(i=this.fileLevelExports.get(a.externalName))return void this.setExportAndCheckLibrary(s,i,e.externalName);if(n=a.externalName,l.has(a))break;l.add(a)}if(r.has(s))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,s);(a=new _).isReExport=!0,a.externalName=n,a.member=e,r.set(s,a)}},t.prototype.initializeFunction=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.name.text,i=e.decorators,a=new R(this,n,r,e,null,i?this.checkDecorators(i,E.GLOBAL|E.INLINE|E.EXTERNAL):E.NONE);if(a.parent=t,this.elementsLookup.set(r,a),t){if(t.members){if(t.members.has(n))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n,a),t.is(o.CommonFlags.MODULE_EXPORT)&&a.is(o.CommonFlags.EXPORT)&&(a.parent=t,a.set(o.CommonFlags.MODULE_EXPORT))}else if(a.is(o.CommonFlags.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,a),this.currentFilespace.members.set(n,a),e.range.source.isEntry){if(this.moduleLevelExports.has(n)){var s=this.moduleLevelExports.get(n);return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,s.element.internalName)}a.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(n,{element:a,identifier:e.name})}}this.checkGlobal(a,e)}},t.prototype.initializeImports=function(e,t,r){var n=e.declarations;if(n)for(var i=0,a=n.length;i<a;++i)this.initializeImport(n[i],e.internalPath,t,r);else if(e.namespaceName){var s=e.namespaceName.text,l=e.range.source.internalPath+o.PATH_DELIMITER+s;if(this.elementsLookup.has(l))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.namespaceName.range,l);var p=this.elementsLookup.get(e.internalPath);if(p)return void this.elementsLookup.set(l,p);var u=new d;u.localName=l;var h=o.FILESPACE_PREFIX+e.internalPath;u.externalName=h,u.externalNameAlt=h+o.PATH_DELIMITER+"index",u.declaration=null,r.push(u)}},t.prototype.initializeImport=function(e,t,r,n){var i=e.fileLevelInternalName;if(this.elementsLookup.has(i))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,i);else{var a,s=t+o.PATH_DELIMITER+e.externalName.text;if(a=this.fileLevelExports.get(s))this.elementsLookup.set(i,a);else{var l=o.PATH_DELIMITER+"index",p=new d;p.localName=i,t.endsWith(l)?(p.externalName=s,p.externalNameAlt=t.substring(0,t.length-l.length+1)+e.externalName.text):(p.externalName=s,p.externalNameAlt=t+l+o.PATH_DELIMITER+e.externalName.text),p.declaration=e,n.push(p)}}},t.prototype.initializeInterface=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.decorators,i=e.name.text,a=new M(this,i,r,e,n?this.checkDecorators(n,E.GLOBAL):E.NONE);if(a.parent=t,this.elementsLookup.set(r,a),t){if(t.members){if(t.members.has(a.internalName))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(a.internalName,a),t.is(o.CommonFlags.MODULE_EXPORT)&&a.is(o.CommonFlags.EXPORT)&&a.set(o.CommonFlags.MODULE_EXPORT)}else if(a.is(o.CommonFlags.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(c.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,a),this.currentFilespace.members.set(i,a),e.range.source.isEntry){if(this.moduleLevelExports.has(i)){var s=this.moduleLevelExports.get(i);return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,s.element.internalName)}a.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(i,{element:a,identifier:e.name})}}for(var l=e.members,u=0,h=l.length;u<h;++u){var d=l[u];switch(d.kind){case p.NodeKind.FIELDDECLARATION:this.initializeField(d,a);break;case p.NodeKind.METHODDECLARATION:d.isAny(o.CommonFlags.GET|o.CommonFlags.SET)?this.initializeAccessor(d,a):this.initializeMethod(d,a);break;default:throw new Error("interface member expected")}}this.checkGlobal(a,e)}},t.prototype.initializeNamespace=function(e,t,r,n){void 0===n&&(n=null);var i=e.fileLevelInternalName,a=e.name.text,s=this.elementsLookup.get(i);if(s||((s=new C(this,a,i,e)).parent=n,this.elementsLookup.set(i,s),this.checkGlobal(s,e)),n){if(n.members){if(n.members.has(a))return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,i)}else n.members=new Map;n.members.set(a,s),n.is(o.CommonFlags.MODULE_EXPORT)&&s.is(o.CommonFlags.EXPORT)&&s.set(o.CommonFlags.MODULE_EXPORT)}else if(s.is(o.CommonFlags.EXPORT)){var l=this.fileLevelExports.get(i);if(l?(l.is(o.CommonFlags.EXPORT)||this.error(c.DiagnosticCode.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local,e.name.range,s.internalName),s=l):this.fileLevelExports.set(i,s),this.currentFilespace.members.set(a,s),e.range.source.isEntry){if(this.moduleLevelExports.has(a)){var u=this.moduleLevelExports.get(a);if(u.element!==s)return void this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,u.element.internalName)}else this.moduleLevelExports.set(a,{element:s,identifier:e.name});s.set(o.CommonFlags.MODULE_EXPORT)}}for(var h=e.members,d=0,_=h.length;d<_;++d)switch(h[d].kind){case p.NodeKind.CLASSDECLARATION:this.initializeClass(h[d],t,r,s);break;case p.NodeKind.ENUMDECLARATION:this.initializeEnum(h[d],s);break;case p.NodeKind.FUNCTIONDECLARATION:this.initializeFunction(h[d],s);break;case p.NodeKind.INTERFACEDECLARATION:this.initializeInterface(h[d],s);break;case p.NodeKind.NAMESPACEDECLARATION:this.initializeNamespace(h[d],t,r,s);break;case p.NodeKind.TYPEDECLARATION:this.error(c.DiagnosticCode.Operation_not_supported,h[d].range);break;case p.NodeKind.VARIABLE:this.initializeVariables(h[d],s);break;default:throw new Error("namespace member expected")}},t.prototype.initializeTypeAlias=function(e,t){void 0===t&&(t=null);var r=e.name.text;if(this.typesLookup.has(r)||this.typeAliases.has(r))this.error(c.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=new m;n.typeParameters=e.typeParameters,n.type=e.type,this.typeAliases.set(r,n)}},t.prototype.initializeVariables=function(e,t){void 0===t&&(t=null);for(var r=e.declarations,n=0,i=r.length;n<i;++n){var a=r[n],s=a.decorators,u=a.fileLevelInternalName;if(this.elementsLookup.has(u))this.error(c.DiagnosticCode.Duplicate_identifier_0,a.name.range,u);else{var h=a.name.text,d=new L(this,h,u,l.Type.void,a,s?this.checkDecorators(s,E.GLOBAL|E.INLINE|E.EXTERNAL):E.NONE);if(d.parent=t,this.elementsLookup.set(u,d),d.hasDecorator(E.INLINE)&&!d.is(o.CommonFlags.CONST)&&this.error(c.DiagnosticCode.Decorator_0_is_not_valid_here,assert(p.findDecorator(p.DecoratorKind.INLINE,s)).range,"inline"),t){if(t.members){if(t.members.has(h)){this.error(c.DiagnosticCode.Duplicate_identifier_0,a.name.range,u);continue}}else t.members=new Map;t.members.set(h,d),t.is(o.CommonFlags.MODULE_EXPORT)&&d.is(o.CommonFlags.EXPORT)&&d.set(o.CommonFlags.MODULE_EXPORT)}else if(d.is(o.CommonFlags.EXPORT)&&(this.fileLevelExports.has(u)?this.error(c.DiagnosticCode.Duplicate_identifier_0,a.name.range,u):this.fileLevelExports.set(u,d),this.currentFilespace.members.set(h,d),a.range.source.isEntry)){if(this.moduleLevelExports.has(h)){var _=this.moduleLevelExports.get(h);this.error(c.DiagnosticCode.Duplicate_identifier_0,a.name.range,_.element.internalName);continue}d.set(o.CommonFlags.MODULE_EXPORT),this.moduleLevelExports.set(h,{element:d,identifier:a.name})}this.checkGlobal(d,a)}}},t}(c.DiagnosticEmitter);function I(e){switch(e){case p.DecoratorKind.GLOBAL:return E.GLOBAL;case p.DecoratorKind.OPERATOR:case p.DecoratorKind.OPERATOR_BINARY:return E.OPERATOR_BINARY;case p.DecoratorKind.OPERATOR_PREFIX:return E.OPERATOR_PREFIX;case p.DecoratorKind.OPERATOR_POSTFIX:return E.OPERATOR_POSTFIX;case p.DecoratorKind.UNMANAGED:return E.UNMANAGED;case p.DecoratorKind.SEALED:return E.SEALED;case p.DecoratorKind.INLINE:return E.INLINE;case p.DecoratorKind.EXTERNAL:return E.EXTERNAL;case p.DecoratorKind.BUILTIN:return E.BUILTIN;default:return E.NONE}}t.Program=T,function(e){e[e.GLOBAL=0]="GLOBAL",e[e.LOCAL=1]="LOCAL",e[e.ENUM=2]="ENUM",e[e.ENUMVALUE=3]="ENUMVALUE",e[e.FUNCTION_PROTOTYPE=4]="FUNCTION_PROTOTYPE",e[e.FUNCTION=5]="FUNCTION",e[e.FUNCTION_TARGET=6]="FUNCTION_TARGET",e[e.CLASS_PROTOTYPE=7]="CLASS_PROTOTYPE",e[e.CLASS=8]="CLASS",e[e.INTERFACE_PROTOTYPE=9]="INTERFACE_PROTOTYPE",e[e.INTERFACE=10]="INTERFACE",e[e.FIELD_PROTOTYPE=11]="FIELD_PROTOTYPE",e[e.FIELD=12]="FIELD",e[e.PROPERTY=13]="PROPERTY",e[e.NAMESPACE=14]="NAMESPACE",e[e.FILESPACE=15]="FILESPACE"}(y=t.ElementKind||(t.ElementKind={})),function(e){e[e.NONE=0]="NONE",e[e.GLOBAL=1]="GLOBAL",e[e.OPERATOR_BINARY=2]="OPERATOR_BINARY",e[e.OPERATOR_PREFIX=4]="OPERATOR_PREFIX",e[e.OPERATOR_POSTFIX=8]="OPERATOR_POSTFIX",e[e.UNMANAGED=16]="UNMANAGED",e[e.SEALED=32]="SEALED",e[e.INLINE=64]="INLINE",e[e.EXTERNAL=128]="EXTERNAL",e[e.BUILTIN=256]="BUILTIN"}(E=t.DecoratorFlags||(t.DecoratorFlags={})),t.decoratorKindToFlag=I;var v=function(){function e(e,t,r){this.flags=o.CommonFlags.NONE,this.decoratorFlags=E.NONE,this.members=null,this.parent=null,this.program=e,this.simpleName=t,this.internalName=r}return e.prototype.is=function(e){return(this.flags&e)==e},e.prototype.isAny=function(e){return 0!=(this.flags&e)},e.prototype.set=function(e){this.flags|=e},e.prototype.hasDecorator=function(e){return(this.decoratorFlags&e)==e},e}();t.Element=v;var A=function(e){function t(t,r){var n=e.call(this,t,r.internalPath,o.FILESPACE_PREFIX+r.internalPath)||this;return n.kind=y.FILESPACE,n.members=new Map,n}return n(t,e),t}(v);t.Filespace=A;var C=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=y.NAMESPACE,a.declaration=i,a.flags=i.flags,a}return n(t,e),t}(v);t.Namespace=C;var N=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=y.ENUM,a.declaration=i,a.flags=i.flags,a}return n(t,e),t}(v);t.Enum=N;var O=function(e){function t(t,r,n,i,a){var s=e.call(this,r,n,i)||this;return s.kind=y.ENUMVALUE,s.constantValue=0,s.parent=t,s.declaration=a,s}return n(t,e),t}(v);t.EnumValue=O,function(e){e[e.NONE=0]="NONE",e[e.INTEGER=1]="INTEGER",e[e.FLOAT=2]="FLOAT"}(t.ConstantValueKind||(t.ConstantValueKind={}));var S=function(e){function t(t,r,n,i,a){var s=e.call(this,t,r,n)||this;return s.constantValueKind=0,s.type=i,s.declaration=a,s}return n(t,e),t.prototype.withConstantIntegerValue=function(e){return this.constantValueKind=1,this.constantIntegerValue=e,this.set(o.CommonFlags.CONST|o.CommonFlags.INLINED),this},t.prototype.withConstantFloatValue=function(e){return this.constantValueKind=2,this.constantFloatValue=e,this.set(o.CommonFlags.CONST|o.CommonFlags.INLINED),this},t}(v);t.VariableLikeElement=S;var L=function(e){function t(t,r,n,i,a,s){var c=e.call(this,t,r,n,i,a)||this;return c.kind=y.GLOBAL,c.flags=a?a.flags:o.CommonFlags.NONE,c.decoratorFlags=s,c.type=i,c}return n(t,e),t}(S);t.Global=L;var b=function(){return function(e,t,r){void 0===r&&(r=null),this.name=e,this.type=t,this.initializer=r}}();t.Parameter=b;var k=function(e){function t(t,r,n,i,a){void 0===a&&(a=null);var s=e.call(this,t,r,r,i,a)||this;return s.kind=y.LOCAL,s.scopedGlobal=null,s.index=n,s}return n(t,e),t}(S);t.Local=k;var R=function(e){function t(t,r,n,i,a,o){void 0===a&&(a=null),void 0===o&&(o=E.NONE);var c=e.call(this,t,r,n)||this;return c.kind=y.FUNCTION_PROTOTYPE,c.instances=new Map,c.classTypeArguments=null,c.operatorKind=s.INVALID,c.declaration=i,c.flags=i.flags,c.classPrototype=a,c.decoratorFlags=o,c}return n(t,e),t.prototype.toString=function(){return this.simpleName},t}(v);t.FunctionPrototype=R;var x=function(e){function t(t,r,n,s,c){var l,p;void 0===s&&(s=null),void 0===c&&(c=null);var u=e.call(this,t.program,t.simpleName,r)||this;if(u.kind=y.FUNCTION,u.localsByName=new Map,u.localsByIndex=[],u.additionalLocals=[],u.breakContext=null,u.debugLocations=[],u.ref=0,u.functionTableIndex=-1,u.trampoline=null,u.outerScope=null,u.nextBreakId=0,u.breakStack=null,u.nextInlineId=0,u.tempI32s=null,u.tempI64s=null,u.tempF32s=null,u.tempF64s=null,u.prototype=t,u.signature=n,u.parent=s,u.flags=t.flags,u.decoratorFlags=t.decoratorFlags,u.contextualTypeArguments=c,!t.is(o.CommonFlags.AMBIENT)){var h=0;if(s&&s.kind==y.CLASS){assert(u.is(o.CommonFlags.INSTANCE));var d=new k(t.program,"this",h++,assert(n.thisType));u.localsByName.set("this",d),u.localsByIndex[d.index]=d;var _=s.contextualTypeArguments;if(_){u.contextualTypeArguments||(u.contextualTypeArguments=new Map);try{for(var m=i(_),g=m.next();!g.done;g=m.next()){var E=a(g.value,2),f=E[0],T=E[1];u.contextualTypeArguments.has(f)||u.contextualTypeArguments.set(f,T)}}catch(e){l={error:e}}finally{try{g&&!g.done&&(p=m.return)&&p.call(m)}finally{if(l)throw l.error}}}}else assert(!u.is(o.CommonFlags.INSTANCE));for(var I=n.parameterTypes,v=0,A=I.length;v<A;++v){var C=I[v],N=n.getParameterName(v);d=new k(t.program,N,h++,C);u.localsByName.set(N,d),u.localsByIndex[d.index]=d}}return u.flow=K.create(u),u}return n(t,e),t.prototype.addLocal=function(e,t,r){void 0===t&&(t=null),void 0===r&&(r=null);var n=this.signature.parameterTypes.length+this.additionalLocals.length;this.is(o.CommonFlags.INSTANCE)&&++n;var i=new k(this.prototype.program,t||"var$"+n.toString(10),n,e,r);if(t){if(this.localsByName.has(t))throw new Error("duplicate local name");this.localsByName.set(t,i)}return this.localsByIndex[i.index]=i,this.additionalLocals.push(e),i},t.prototype.getTempLocal=function(e,t){var r,n;switch(void 0===t&&(t=!1),e.toNativeType()){case 1:r=this.tempI32s;break;case 2:r=this.tempI64s;break;case 3:r=this.tempF32s;break;case 4:r=this.tempF64s;break;default:throw new Error("concrete type expected")}return r&&r.length?((n=r.pop()).type=e,n.flags=o.CommonFlags.NONE):n=this.addLocal(e),e.is(36)&&this.flow.setLocalWrapped(n.index,t),n},t.prototype.freeTempLocal=function(e){if(!e.is(o.CommonFlags.INLINED)){var t;switch(assert(e.index>=0),assert(null!=e.type),e.type.toNativeType()){case 1:t=this.tempI32s||(this.tempI32s=[]);break;case 2:t=this.tempI64s||(this.tempI64s=[]);break;case 3:t=this.tempF32s||(this.tempF32s=[]);break;case 4:t=this.tempF64s||(this.tempF64s=[]);break;default:throw new Error("concrete type expected")}assert(e.index>=0),t.push(e)}},t.prototype.getAndFreeTempLocal=function(e,t){var r,n;switch(e.toNativeType()){case 1:r=this.tempI32s||(this.tempI32s=[]);break;case 2:r=this.tempI64s||(this.tempI64s=[]);break;case 3:r=this.tempF32s||(this.tempF32s=[]);break;case 4:r=this.tempF64s||(this.tempF64s=[]);break;default:throw new Error("concrete type expected")}return r.length?(n=r[r.length-1]).type=e:(n=this.addLocal(e),r.push(n)),e.is(36)&&this.flow.setLocalWrapped(n.index,t),n},t.prototype.enterBreakContext=function(){var e=this.nextBreakId++;return this.breakStack?this.breakStack.push(e):this.breakStack=[e],this.breakContext=e.toString(10)},t.prototype.leaveBreakContext=function(){assert(null!=this.breakStack);var e=this.breakStack.length;assert(e>0),this.breakStack.pop(),e>1?this.breakContext=this.breakStack[e-2].toString(10):(this.breakContext=null,this.breakStack=null)},t.prototype.finalize=function(e,t){if(this.ref=t,assert(!this.breakStack||!this.breakStack.length),this.breakStack=null,this.breakContext=null,this.tempI32s=this.tempI64s=this.tempF32s=this.tempF64s=null,this.program.options.sourceMap)for(var r=this.debugLocations,n=0,i=r.length;n<i;++n){var a=r[n];e.setDebugLocation(t,a.debugInfoRef,a.source.debugInfoIndex,a.line,a.column)}},t.prototype.toString=function(){return this.prototype.simpleName},t}(v);t.Function=x;var F=function(e){function t(t,r){var n=e.call(this,t,"","")||this;n.kind=y.FUNCTION_TARGET;var i=r.toSignatureString();return n.simpleName=i,n.internalName=i,n.signature=r,n.type=l.Type.u32.asFunction(r),n}return n(t,e),t}(v);t.FunctionTarget=F;var D=function(e){function t(t,r,n,i){var a=e.call(this,t.program,r,n)||this;return a.kind=y.FIELD_PROTOTYPE,a.classPrototype=t,a.declaration=i,a.flags=i.flags,a}return n(t,e),t}(v);t.FieldPrototype=D;var B=function(e){function t(t,r,n,i,a){var s=e.call(this,t.program,t.simpleName,r,n,i)||this;return s.kind=y.FIELD,s.memoryOffset=-1,s.prototype=t,s.flags=t.flags,s.type=n,s.parent=a,s}return n(t,e),t}(S);t.Field=B;var U=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=y.PROPERTY,a.getterPrototype=null,a.setterPrototype=null,a.parent=i,a}return n(t,e),t}(v);t.Property=U;var P=function(e){function t(t,r,n,i,a){var s=e.call(this,t,r,n)||this;return s.kind=y.CLASS_PROTOTYPE,s.instances=new Map,s.instanceMembers=null,s.basePrototype=null,s.constructorPrototype=null,s.overloadPrototypes=new Map,s.declaration=i,s.flags=i.flags,s.decoratorFlags=a,s}return n(t,e),t.prototype.toString=function(){return this.simpleName},t}(v);t.ClassPrototype=P;var w=function(e){function t(t,r,n,s,o){var c,l;void 0===s&&(s=null),void 0===o&&(o=null);var p=e.call(this,t.program,r,n)||this;if(p.kind=y.CLASS,p.contextualTypeArguments=null,p.currentMemoryOffset=0,p.constructorInstance=null,p.overloads=null,p.gcHookIndex=-1,p.prototype=t,p.flags=t.flags,p.decoratorFlags=t.decoratorFlags,p.typeArguments=s,p.type=t.program.options.usizeType.asClass(p),p.base=o,o){var u=o.contextualTypeArguments;if(u){p.contextualTypeArguments||(p.contextualTypeArguments=new Map);try{for(var h=i(u),d=h.next();!d.done;d=h.next()){var _=a(d.value,2),m=_[0],g=_[1];p.contextualTypeArguments.set(m,g)}}catch(e){c={error:e}}finally{try{d&&!d.done&&(l=h.return)&&l.call(h)}finally{if(c)throw c.error}}}}var E,f,T=p.prototype.declaration;if(T){var I=T.typeParameters;if(s){if((f=s.length)!=I.length)throw new Error("type argument count mismatch");if(f)for(p.contextualTypeArguments||(p.contextualTypeArguments=new Map),E=0;E<f;++E)p.contextualTypeArguments.set(I[E].name.text,s[E])}else if(I.length)throw new Error("type argument count mismatch")}return p}return n(t,e),t.prototype.isAssignableTo=function(e){var t=this;do{if(t==e)return!0}while(t=t.base);return!1},t.prototype.lookupOverload=function(e,t){if(void 0===t&&(t=!1),t)switch(e){case s.INDEXED_GET:if(r=this.lookupOverload(s.UNCHECKED_INDEXED_GET))return r;break;case s.INDEXED_SET:var r;if(r=this.lookupOverload(s.UNCHECKED_INDEXED_SET))return r;break;default:assert(!1)}var n=this;do{var i=n.overloads;if(i){var a=i.get(e);if(a)return a}}while(n=n.base);return null},t.prototype.offsetof=function(e){var t=assert(this.members);assert(t.has(e));var r=t.get(e);return assert(r.kind==y.FIELD),r.memoryOffset},t.prototype.toString=function(){return this.simpleName},t}(v);t.Class=w;var M=function(e){function t(t,r,n,i,a){var s=e.call(this,t,r,n,i,a)||this;return s.kind=y.INTERFACE_PROTOTYPE,s}return n(t,e),t}(P);t.InterfacePrototype=M;var G=function(e){function t(t,r,n,i,a){void 0===i&&(i=[]),void 0===a&&(a=null);var s=e.call(this,t,r,n,i,a)||this;return s.kind=y.INTERFACE,s}return n(t,e),t}(w);t.Interface=G,function(e){e[e.NONE=0]="NONE",e[e.RETURNS=1]="RETURNS",e[e.RETURNS_WRAPPED=2]="RETURNS_WRAPPED",e[e.THROWS=4]="THROWS",e[e.BREAKS=8]="BREAKS",e[e.CONTINUES=16]="CONTINUES",e[e.ALLOCATES=32]="ALLOCATES",e[e.CONDITIONALLY_RETURNS=64]="CONDITIONALLY_RETURNS",e[e.CONDITIONALLY_THROWS=128]="CONDITIONALLY_THROWS",e[e.CONDITIONALLY_BREAKS=256]="CONDITIONALLY_BREAKS",e[e.CONDITIONALLY_CONTINUES=512]="CONDITIONALLY_CONTINUES",e[e.CONDITIONALLY_ALLOCATES=1024]="CONDITIONALLY_ALLOCATES",e[e.INLINE_CONTEXT=2048]="INLINE_CONTEXT",e[e.UNCHECKED_CONTEXT=4096]="UNCHECKED_CONTEXT",e[e.ANY_TERMINATING=29]="ANY_TERMINATING",e[e.ANY_CATEGORICAL=63]="ANY_CATEGORICAL",e[e.ANY_CONDITIONAL=1984]="ANY_CONDITIONAL"}(t.FlowFlags||(t.FlowFlags={}));var K=function(){function e(){this.scopedLocals=null}return e.create=function(t){var r=new e;return r.parent=null,r.flags=0,r.currentFunction=t,r.continueLabel=null,r.breakLabel=null,r.returnLabel=null,r.returnType=t.signature.returnType,r.contextualTypeArguments=t.contextualTypeArguments,r.wrappedLocals=i64_new(0),r.wrappedLocalsExt=null,r},e.prototype.is=function(e){return(this.flags&e)==e},e.prototype.isAny=function(e){return 0!=(this.flags&e)},e.prototype.set=function(e){this.flags|=e},e.prototype.unset=function(e){this.flags&=~e},e.prototype.fork=function(){var t=new e;return t.parent=this,t.flags=this.flags,t.currentFunction=this.currentFunction,t.continueLabel=this.continueLabel,t.breakLabel=this.breakLabel,t.returnLabel=this.returnLabel,t.returnType=this.returnType,t.contextualTypeArguments=this.contextualTypeArguments,t.wrappedLocals=this.wrappedLocals,t.wrappedLocalsExt=this.wrappedLocalsExt?this.wrappedLocalsExt.slice():null,t},e.prototype.free=function(){var e,t,r=assert(this.parent);if(this.scopedLocals){try{for(var n=i(this.scopedLocals.values()),a=n.next();!a.done;a=n.next()){var s=a.value;s.is(o.CommonFlags.SCOPED)&&this.currentFunction.freeTempLocal(s)}}catch(t){e={error:t}}finally{try{a&&!a.done&&(t=n.return)&&t.call(n)}finally{if(e)throw e.error}}this.scopedLocals=null}return r},e.prototype.addScopedLocal=function(e,t,r,n){var i=this.currentFunction.getTempLocal(e,!1);if(this.scopedLocals){var a=this.scopedLocals.get(t);if(a)return n?this.currentFunction.program.error(c.DiagnosticCode.Duplicate_identifier_0,n.name.range):assert(!1),a}else this.scopedLocals=new Map;return i.set(o.CommonFlags.SCOPED),this.scopedLocals.set(t,i),e.is(36)&&this.setLocalWrapped(i.index,r),i},e.prototype.addScopedLocalAlias=function(e,t,r){if(this.scopedLocals){var n=this.scopedLocals.get(r);if(n){var i=n.declaration;return i?this.currentFunction.program.error(c.DiagnosticCode.Duplicate_identifier_0,i.name.range):assert(!1),n}}else this.scopedLocals=new Map;assert(e<this.currentFunction.localsByIndex.length);var a=new k(this.currentFunction.program,r,e,t,null);return this.scopedLocals.set(r,a),a},e.prototype.getScopedLocal=function(e){var t,r=this;do{if(r.scopedLocals&&(t=r.scopedLocals.get(e)))return t}while(r=r.parent);return this.currentFunction.localsByName.get(e)},e.prototype.isLocalWrapped=function(e){var t,r;if(e<64){if(e<0)return!0;t=this.wrappedLocals}else{if(!(r=this.wrappedLocalsExt))return!1;var n=(e-64)/64|0;if(n>=r.length)return!1;t=r[n],e-=64*(n+1)}return i64_ne(i64_and(t,i64_shl(i64_one,i64_new(e))),i64_zero)},e.prototype.setLocalWrapped=function(e,t){var r,n=-1;if(e<64){if(e<0)return;r=this.wrappedLocals}else{var i=this.wrappedLocalsExt;for(n=(e-64)/64|0,i||(this.wrappedLocalsExt=i=new Array(n+1),i.length=0);i.length<=n;)i.push(i64_new(0));r=i[n],e-=64*(n+1)}r=t?i64_or(r,i64_shl(i64_one,i64_new(e))):i64_and(r,i64_not(i64_shl(i64_one,i64_new(e)))),n>=0?this.wrappedLocalsExt[n]=r:this.wrappedLocals=r},e.prototype.inherit=function(e){this.flags|=2047&e.flags,this.wrappedLocals=e.wrappedLocals,this.wrappedLocalsExt=e.wrappedLocalsExt},e.prototype.inheritConditional=function(e){e.is(1)&&this.set(64),e.is(4)&&this.set(128),e.is(8)&&e.breakLabel==this.breakLabel&&this.set(256),e.is(16)&&e.continueLabel==this.continueLabel&&this.set(512),e.is(32)&&this.set(1024)},e.prototype.inheritMutual=function(e,t){this.flags|=e.flags&t.flags&63,this.flags|=1984&e.flags,this.flags|=1984&t.flags,this.wrappedLocals=i64_and(e.wrappedLocals,t.wrappedLocals);var r=e.wrappedLocalsExt,n=t.wrappedLocalsExt;if(null!=r&&null!=n){var i=this.wrappedLocalsExt,a=min(r.length,n.length);if(a){if(i)for(;i.length<a;)i.push(i64_new(0));else i=new Array(a);for(var s=0;s<a;++s)i[s]=i64_and(r[s],n[s])}}},e.prototype.canOverflow=function(e,t){if(assert(t!=l.Type.void),!t.is(36))return!1;var r;switch(u.getExpressionId(e)){case u.ExpressionId.GetLocal:var n=this.currentFunction,i=n.localsByIndex[u.getGetLocalIndex(e)];return!n.flow.isLocalWrapped(i.index)||z(i.type,t);case u.ExpressionId.SetLocal:return assert(u.isTeeLocal(e)),this.canOverflow(u.getSetLocalValue(e),t);case u.ExpressionId.GetGlobal:return!1;case u.ExpressionId.Binary:switch(u.getBinaryOp(e)){case u.BinaryOp.EqI32:case u.BinaryOp.EqI64:case u.BinaryOp.EqF32:case u.BinaryOp.EqF64:case u.BinaryOp.NeI32:case u.BinaryOp.NeI64:case u.BinaryOp.NeF32:case u.BinaryOp.NeF64:case u.BinaryOp.LtI32:case u.BinaryOp.LtU32:case u.BinaryOp.LtI64:case u.BinaryOp.LtU64:case u.BinaryOp.LtF32:case u.BinaryOp.LtF64:case u.BinaryOp.LeI32:case u.BinaryOp.LeU32:case u.BinaryOp.LeI64:case u.BinaryOp.LeU64:case u.BinaryOp.LeF32:case u.BinaryOp.LeF64:case u.BinaryOp.GtI32:case u.BinaryOp.GtU32:case u.BinaryOp.GtI64:case u.BinaryOp.GtU64:case u.BinaryOp.GtF32:case u.BinaryOp.GtF64:case u.BinaryOp.GeI32:case u.BinaryOp.GeU32:case u.BinaryOp.GeI64:case u.BinaryOp.GeU64:case u.BinaryOp.GeF32:case u.BinaryOp.GeF64:return!1;case u.BinaryOp.MulI32:return!(u.getExpressionId(r=u.getBinaryLeft(e))==u.ExpressionId.Const&&(0==u.getConstValueI32(r)||1==u.getConstValueI32(r)&&!this.canOverflow(u.getBinaryRight(e),t))||u.getExpressionId(r=u.getBinaryRight(e))==u.ExpressionId.Const&&(0==u.getConstValueI32(r)||1==u.getConstValueI32(r)&&!this.canOverflow(u.getBinaryLeft(e),t)));case u.BinaryOp.AndI32:return!(u.getExpressionId(r=u.getBinaryLeft(e))==u.ExpressionId.Const&&u.getConstValueI32(r)<=t.computeSmallIntegerMask(l.Type.i32)||!this.canOverflow(r,t)||u.getExpressionId(r=u.getBinaryRight(e))==u.ExpressionId.Const&&u.getConstValueI32(r)<=t.computeSmallIntegerMask(l.Type.i32)||!this.canOverflow(r,t));case u.BinaryOp.ShlI32:var a=32-t.size;return u.getExpressionId(r=u.getBinaryRight(e))!=u.ExpressionId.Const||u.getConstValueI32(r)<a;case u.BinaryOp.ShrI32:a=32-t.size;return this.canOverflow(u.getBinaryLeft(e),t)&&(u.getExpressionId(r=u.getBinaryRight(e))!=u.ExpressionId.Const||u.getConstValueI32(r)<a);case u.BinaryOp.ShrU32:a=32-t.size;return t.is(1)?!(u.getExpressionId(r=u.getBinaryRight(e))==u.ExpressionId.Const&&u.getConstValueI32(r)>a):this.canOverflow(u.getBinaryLeft(e),t)&&!(u.getExpressionId(r=u.getBinaryRight(e))==u.ExpressionId.Const&&u.getConstValueI32(r)>=a);case u.BinaryOp.DivU32:case u.BinaryOp.RemI32:case u.BinaryOp.RemU32:return this.canOverflow(u.getBinaryLeft(e),t)||this.canOverflow(u.getBinaryRight(e),t)}break;case u.ExpressionId.Unary:switch(u.getUnaryOp(e)){case u.UnaryOp.EqzI32:case u.UnaryOp.EqzI64:return!1;case u.UnaryOp.ClzI32:case u.UnaryOp.CtzI32:case u.UnaryOp.PopcntI32:return t.size<7}break;case u.ExpressionId.Const:var s=0;switch(u.getExpressionType(e)){case 1:s=u.getConstValueI32(e);break;case 2:s=u.getConstValueI64Low(e);break;case 3:s=i32(u.getConstValueF32(e));break;case 4:s=i32(u.getConstValueF64(e));break;default:assert(!1)}switch(t.kind){case 0:return s<i8.MIN_VALUE||s>i8.MAX_VALUE;case 1:return s<i16.MIN_VALUE||s>i16.MAX_VALUE;case 5:return s<0||s>u8.MAX_VALUE;case 6:return s<0||s>u16.MAX_VALUE;case 10:return 0!=(-2&s)}break;case u.ExpressionId.Load:var o=void 0;switch(u.getLoadBytes(e)){case 1:o=u.isLoadSigned(e)?l.Type.i8:l.Type.u8;break;case 2:o=u.isLoadSigned(e)?l.Type.i16:l.Type.u16;break;default:o=u.isLoadSigned(e)?l.Type.i32:l.Type.u32}return z(o,t);case u.ExpressionId.Block:if(!u.getBlockName(e)){var c=assert(u.getBlockChildCount(e)),p=u.getBlockChild(e,c-1);return this.canOverflow(p,t)}break;case u.ExpressionId.If:return this.canOverflow(u.getIfTrue(e),t)||this.canOverflow(assert(u.getIfFalse(e)),t);case u.ExpressionId.Select:return this.canOverflow(u.getSelectThen(e),t)||this.canOverflow(u.getSelectElse(e),t);case u.ExpressionId.Call:var h=this.currentFunction.program,d=assert(h.instancesLookup.get(assert(u.getCallTarget(e))));assert(d.kind==y.FUNCTION);var _=d.signature.returnType;return!d.flow.is(2)||z(_,t);case u.ExpressionId.Unreachable:return!1}return!0},e.prototype.finalize=function(){assert(null==this.parent),this.continueLabel=null,this.breakLabel=null,this.returnLabel=null,this.contextualTypeArguments=null},e}();function z(e,t){var r=e.byteSize,n=t.byteSize;return!e.is(4)||r>n||e.is(1)!=t.is(1)}t.Flow=K},function(e,t,r){"use strict";Object.defineProperty(t,"__esModule",{value:!0});var 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32",e[e.RotlI32=_BinaryenRotLInt32()]="RotlI32",e[e.RotrI32=_BinaryenRotRInt32()]="RotrI32",e[e.EqI32=_BinaryenEqInt32()]="EqI32",e[e.NeI32=_BinaryenNeInt32()]="NeI32",e[e.LtI32=_BinaryenLtSInt32()]="LtI32",e[e.LtU32=_BinaryenLtUInt32()]="LtU32",e[e.LeI32=_BinaryenLeSInt32()]="LeI32",e[e.LeU32=_BinaryenLeUInt32()]="LeU32",e[e.GtI32=_BinaryenGtSInt32()]="GtI32",e[e.GtU32=_BinaryenGtUInt32()]="GtU32",e[e.GeI32=_BinaryenGeSInt32()]="GeI32",e[e.GeU32=_BinaryenGeUInt32()]="GeU32",e[e.AddI64=_BinaryenAddInt64()]="AddI64",e[e.SubI64=_BinaryenSubInt64()]="SubI64",e[e.MulI64=_BinaryenMulInt64()]="MulI64",e[e.DivI64=_BinaryenDivSInt64()]="DivI64",e[e.DivU64=_BinaryenDivUInt64()]="DivU64",e[e.RemI64=_BinaryenRemSInt64()]="RemI64",e[e.RemU64=_BinaryenRemUInt64()]="RemU64",e[e.AndI64=_BinaryenAndInt64()]="AndI64",e[e.OrI64=_BinaryenOrInt64()]="OrI64",e[e.XorI64=_BinaryenXorInt64()]="XorI64",e[e.ShlI64=_BinaryenShlInt64()]="ShlI64",e[e.ShrU64=_BinaryenShrUInt64()]="ShrU64",e[e.ShrI64=_BinaryenShrSInt64()]="ShrI64",e[e.RotlI64=_BinaryenRotLInt64()]="RotlI64",e[e.RotrI64=_BinaryenRotRInt64()]="RotrI64",e[e.EqI64=_BinaryenEqInt64()]="EqI64",e[e.NeI64=_BinaryenNeInt64()]="NeI64",e[e.LtI64=_BinaryenLtSInt64()]="LtI64",e[e.LtU64=_BinaryenLtUInt64()]="LtU64",e[e.LeI64=_BinaryenLeSInt64()]="LeI64",e[e.LeU64=_BinaryenLeUInt64()]="LeU64",e[e.GtI64=_BinaryenGtSInt64()]="GtI64",e[e.GtU64=_BinaryenGtUInt64()]="GtU64",e[e.GeI64=_BinaryenGeSInt64()]="GeI64",e[e.GeU64=_BinaryenGeUInt64()]="GeU64",e[e.AddF32=_BinaryenAddFloat32()]="AddF32",e[e.SubF32=_BinaryenSubFloat32()]="SubF32",e[e.MulF32=_BinaryenMulFloat32()]="MulF32",e[e.DivF32=_BinaryenDivFloat32()]="DivF32",e[e.CopysignF32=_BinaryenCopySignFloat32()]="CopysignF32",e[e.MinF32=_BinaryenMinFloat32()]="MinF32",e[e.MaxF32=_BinaryenMaxFloat32()]="MaxF32",e[e.EqF32=_BinaryenEqFloat32()]="EqF32",e[e.NeF32=_BinaryenNeFloat32()]="NeF32",e[e.LtF32=_BinaryenLtFloat32()]="LtF32",e[e.LeF32=_BinaryenLeFloat32()]="LeF32",e[e.GtF32=_BinaryenGtFloat32()]="GtF32",e[e.GeF32=_BinaryenGeFloat32()]="GeF32",e[e.AddF64=_BinaryenAddFloat64()]="AddF64",e[e.SubF64=_BinaryenSubFloat64()]="SubF64",e[e.MulF64=_BinaryenMulFloat64()]="MulF64",e[e.DivF64=_BinaryenDivFloat64()]="DivF64",e[e.CopysignF64=_BinaryenCopySignFloat64()]="CopysignF64",e[e.MinF64=_BinaryenMinFloat64()]="MinF64",e[e.MaxF64=_BinaryenMaxFloat64()]="MaxF64",e[e.EqF64=_BinaryenEqFloat64()]="EqF64",e[e.NeF64=_BinaryenNeFloat64()]="NeF64",e[e.LtF64=_BinaryenLtFloat64()]="LtF64",e[e.LeF64=_BinaryenLeFloat64()]="LeF64",e[e.GtF64=_BinaryenGtFloat64()]="GtF64",e[e.GeF64=_BinaryenGeFloat64()]="GeF64"}(t.BinaryOp||(t.BinaryOp={})),function(e){e[e.PageSize=_BinaryenPageSize()]="PageSize",e[e.CurrentMemory=_BinaryenCurrentMemory()]="CurrentMemory",e[e.GrowMemory=_BinaryenGrowMemory()]="GrowMemory",e[e.HasFeature=_BinaryenHasFeature()]="HasFeature"}(t.HostOp||(t.HostOp={})),function(e){e[e.Add=_BinaryenAtomicRMWAdd()]="Add",e[e.Sub=_BinaryenAtomicRMWSub()]="Sub",e[e.And=_BinaryenAtomicRMWAnd()]="And",e[e.Or=_BinaryenAtomicRMWOr()]="Or",e[e.Xor=_BinaryenAtomicRMWXor()]="Xor",e[e.Xchg=_BinaryenAtomicRMWXchg()]="Xchg"}(t.AtomicRMWOp||(t.AtomicRMWOp={}));var 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e=assert(this.cachedTemporaryName);_BinaryenRemoveFunction(this.ref,e),_BinaryenRemoveFunctionType(this.ref,e)},e.prototype.addFunctionExport=function(e,t){var r=u(e),n=u(t);try{return _BinaryenAddFunctionExport(this.ref,r,n)}finally{memory.free(n),memory.free(r)}},e.prototype.addTableExport=function(e,t){var r=u(e),n=u(t);try{return _BinaryenAddTableExport(this.ref,r,n)}finally{memory.free(n),memory.free(r)}},e.prototype.addMemoryExport=function(e,t){var r=u(e),n=u(t);try{return _BinaryenAddMemoryExport(this.ref,r,n)}finally{memory.free(n),memory.free(r)}},e.prototype.addGlobalExport=function(e,t){var r=u(e),n=u(t);try{return _BinaryenAddGlobalExport(this.ref,r,n)}finally{memory.free(n),memory.free(r)}},e.prototype.removeExport=function(e){var t=u(e);try{_BinaryenRemoveExport(this.ref,t)}finally{memory.free(t)}},e.prototype.addFunctionImport=function(e,t,r,n){var i=u(e),a=u(t),s=u(r);try{return 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m=r[_].buffer,g=r[_].offset;p[_]=c(m),h[_]=n==i.Target.WASM64?this.createI64(i64_low(g),i64_high(g)):this.createI32(i64_low(g)),d[_]=m.length}var y=l(p),E=l(h),f=l(d);try{_BinaryenSetMemory(this.ref,e,t,s,y,E,f,o)}finally{memory.free(f),memory.free(E),memory.free(y);for(_=o-1;_>=0;--_)memory.free(p[_]);memory.free(s)}},e.prototype.setFunctionTable=function(e){var t=p(e);try{_BinaryenSetFunctionTable(this.ref,t,e.length)}finally{memory.free(t)}},e.prototype.setStart=function(e){_BinaryenSetStart(this.ref,e)},e.prototype.getOptimizeLevel=function(){return _BinaryenGetOptimizeLevel()},e.prototype.setOptimizeLevel=function(e){void 0===e&&(e=2),_BinaryenSetOptimizeLevel(e)},e.prototype.getShrinkLevel=function(){return _BinaryenGetShrinkLevel()},e.prototype.setShrinkLevel=function(e){void 0===e&&(e=1),_BinaryenSetShrinkLevel(e)},e.prototype.setDebugInfo=function(e){void 0===e&&(e=!1),_BinaryenSetDebugInfo(e)},e.prototype.optimize=function(e){void 0===e&&(e=0),e?_BinaryenFunctionOptimize(e,this.ref):_BinaryenModuleOptimize(this.ref)},e.prototype.runPasses=function(e,t){void 0===t&&(t=0);for(var r=e.length,n=new Array(r),i=0;i<r;++i)n[i]=u(e[i]);var a=l(n);try{t?_BinaryenFunctionRunPasses(t,this.ref,a,r):_BinaryenModuleRunPasses(this.ref,a,r)}finally{memory.free(a);for(i=r;i>=0;--i)memory.free(n[i])}},e.prototype.precomputeExpression=function(e){var t=_BinaryenGetOptimizeLevel(),r=_BinaryenGetShrinkLevel(),n=_BinaryenGetDebugInfo();_BinaryenSetOptimizeLevel(4),_BinaryenSetShrinkLevel(0),_BinaryenSetDebugInfo(!1);var i=_BinaryenExpressionGetType(e),a=this.addTemporaryFunction(i,null,e),s=this.cachedPrecomputeNames;if(!s){var o=u("precompute");this.cachedPrecomputeName=o,this.cachedPrecomputeNames=s=l([o])}return _BinaryenFunctionRunPasses(a,this.ref,s,1),e=_BinaryenFunctionGetBody(a),this.removeTemporaryFunction(),_BinaryenSetOptimizeLevel(t),_BinaryenSetShrinkLevel(r),_BinaryenSetDebugInfo(n),e},e.prototype.validate=function(){return 1==_BinaryenModuleValidate(this.ref)},e.prototype.interpret=function(){_BinaryenModuleInterpret(this.ref)},e.prototype.toBinary=function(e){var t=this.cachedByValue,r=u(e),n=0,i=0;try{_BinaryenModuleAllocateAndWrite(t,this.ref,r),n=h(t);var a=h(t+4);i=h(t+8);var s=new _;return s.output=function(e,t){for(var r=new Uint8Array(t),n=0;n<t;++n)r[n]=load(e+n);return r}(n,a),s.sourceMap=d(i),s}finally{r&&memory.free(r),n&&memory.free(n),i&&memory.free(i)}},e.prototype.toText=function(){throw new Error("not implemented")},e.prototype.toAsmjs=function(){throw new Error("not implemented")},e.prototype.dispose=function(){assert(this.ref),memory.free(this.cachedByValue),memory.free(this.cachedTemporaryName),memory.free(this.cachedPrecomputeName),memory.free(this.cachedPrecomputeNames),_BinaryenModuleDispose(this.ref),this.ref=0},e.prototype.createRelooper=function(){return o.create(this)},e.prototype.cloneExpression=function(e,t,r){if(void 0===t&&(t=!1),void 0===r&&(r=i32.MAX_VALUE),r<0)return 0;var i,a;switch(r-=1,_BinaryenExpressionGetId(e)){case n.Const:switch(_BinaryenExpressionGetType(e)){case 1:return this.createI32(_BinaryenConstGetValueI32(e));case 2:return this.createI64(_BinaryenConstGetValueI64Low(e),_BinaryenConstGetValueI64High(e));case 3:return this.createF32(_BinaryenConstGetValueF32(e));case 4:return this.createF64(_BinaryenConstGetValueF64(e));default:throw new Error("concrete type expected")}case n.GetLocal:return _BinaryenGetLocal(this.ref,_BinaryenGetLocalGetIndex(e),_BinaryenExpressionGetType(e));case n.GetGlobal:var s=_BinaryenGetGlobalGetName(e);if(!s)break;return _BinaryenGetGlobal(this.ref,s,_BinaryenExpressionGetType(e));case n.Load:if(!(i=this.cloneExpression(_BinaryenLoadGetPtr(e),t,r)))break;return _BinaryenLoadIsAtomic(e)?_BinaryenAtomicLoad(this.ref,_BinaryenLoadGetBytes(e),_BinaryenLoadGetOffset(e),_BinaryenExpressionGetType(e),i):_BinaryenLoad(this.ref,_BinaryenLoadGetBytes(e),_BinaryenLoadIsSigned(e)?1:0,_BinaryenLoadGetOffset(e),_BinaryenLoadGetAlign(e),_BinaryenExpressionGetType(e),i);case n.Unary:if(!(i=this.cloneExpression(_BinaryenUnaryGetValue(e),t,r)))break;return _BinaryenUnary(this.ref,_BinaryenUnaryGetOp(e),i);case n.Binary:if(!(i=this.cloneExpression(_BinaryenBinaryGetLeft(e),t,r)))break;if(!(a=this.cloneExpression(_BinaryenBinaryGetRight(e),t,r)))break;return _BinaryenBinary(this.ref,_BinaryenBinaryGetOp(e),i,a)}return 0},e.prototype.addDebugInfoFile=function(e){var t=u(e);try{return _BinaryenModuleAddDebugInfoFileName(this.ref,t)}finally{memory.free(t)}},e.prototype.getDebugInfoFile=function(e){return d(_BinaryenModuleGetDebugInfoFileName(this.ref,e))},e.prototype.setDebugLocation=function(e,t,r,n,i){_BinaryenFunctionSetDebugLocation(e,t,r,n,i)},e.MAX_MEMORY_WASM32=65535,e.MAX_MEMORY_WASM64=65535,e}();t.Module=s,t.getExpressionId=function(e){return _BinaryenExpressionGetId(e)},t.getExpressionType=function(e){return _BinaryenExpressionGetType(e)},t.getConstValueI32=function(e){return _BinaryenConstGetValueI32(e)},t.getConstValueI64Low=function(e){return _BinaryenConstGetValueI64Low(e)},t.getConstValueI64High=function(e){return _BinaryenConstGetValueI64High(e)},t.getConstValueF32=function(e){return _BinaryenConstGetValueF32(e)},t.getConstValueF64=function(e){return _BinaryenConstGetValueF64(e)},t.getGetLocalIndex=function(e){return _BinaryenGetLocalGetIndex(e)},t.getSetLocalIndex=function(e){return _BinaryenSetLocalGetIndex(e)},t.getSetLocalValue=function(e){return _BinaryenSetLocalGetValue(e)},t.isTeeLocal=function(e){return _BinaryenSetLocalIsTee(e)},t.getBinaryOp=function(e){return _BinaryenBinaryGetOp(e)},t.getBinaryLeft=function(e){return _BinaryenBinaryGetLeft(e)},t.getBinaryRight=function(e){return _BinaryenBinaryGetRight(e)},t.getUnaryOp=function(e){return _BinaryenUnaryGetOp(e)},t.getUnaryValue=function(e){return _BinaryenUnaryGetValue(e)},t.getLoadBytes=function(e){return _BinaryenLoadGetBytes(e)},t.getLoadOffset=function(e){return _BinaryenLoadGetOffset(e)},t.getLoadPtr=function(e){return _BinaryenLoadGetPtr(e)},t.isLoadSigned=function(e){return _BinaryenLoadIsSigned(e)},t.getStoreBytes=function(e){return _BinaryenStoreGetBytes(e)},t.getStoreOffset=function(e){return _BinaryenStoreGetOffset(e)},t.getStorePtr=function(e){return _BinaryenStoreGetPtr(e)},t.getStoreValue=function(e){return _BinaryenStoreGetValue(e)},t.getBlockName=function(e){return d(_BinaryenBlockGetName(e))},t.getBlockChildCount=function(e){return _BinaryenBlockGetNumChildren(e)},t.getBlockChild=function(e,t){return _BinaryenBlockGetChild(e,t)},t.getIfCondition=function(e){return _BinaryenIfGetCondition(e)},t.getIfTrue=function(e){return _BinaryenIfGetIfTrue(e)},t.getIfFalse=function(e){return _BinaryenIfGetIfFalse(e)},t.getLoopName=function(e){return d(_BinaryenLoopGetName(e))},t.getLoopBody=function(e){return _BinaryenLoopGetBody(e)},t.getBreakName=function(e){return d(_BinaryenBreakGetName(e))},t.getBreakCondition=function(e){return _BinaryenBreakGetCondition(e)},t.getSelectThen=function(e){return _BinaryenSelectGetIfTrue(e)},t.getSelectElse=function(e){return _BinaryenSelectGetIfFalse(e)},t.getSelectCondition=function(e){return _BinaryenSelectGetCondition(e)},t.getDropValue=function(e){return _BinaryenDropGetValue(e)},t.getReturnValue=function(e){return _BinaryenReturnGetValue(e)},t.getCallTarget=function(e){return d(_BinaryenCallGetTarget(e))},t.getHostOp=function(e){return _BinaryenHostGetOp(e)},t.getHostOperandCount=function(e){return _BinaryenHostGetNumOperands(e)},t.getHostOperand=function(e,t){return _BinaryenHostGetOperand(e,t)},t.getHostName=function(e){return d(_BinaryenHostGetNameOperand(e))},t.getFunctionBody=function(e){return _BinaryenFunctionGetBody(e)},t.getFunctionName=function(e){return d(_BinaryenFunctionGetName(e))},t.getFunctionParamCount=function(e){return _BinaryenFunctionGetNumParams(e)},t.getFunctionParamType=function(e,t){return _BinaryenFunctionGetParam(e,t)},t.getFunctionResultType=function(e){return _BinaryenFunctionGetResult(e)};var o=function(){function e(){}return e.create=function(t){var r=new e;return r.module=t,r.ref=_RelooperCreate(),r},e.prototype.addBlock=function(e){return _RelooperAddBlock(this.ref,e)},e.prototype.addBranch=function(e,t,r,n){void 0===r&&(r=0),void 0===n&&(n=0),_RelooperAddBranch(e,t,r,n)},e.prototype.addBlockWithSwitch=function(e,t){return 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a=e.charCodeAt(n);a>=55296&&a<=57343&&n+1<i&&(a=65536+((1023&a)<<10)|1023&e.charCodeAt(++n)),a<=127?store(r++,a):a<=2047?(store(r++,192|a>>>6),store(r++,128|63&a)):a<=65535?(store(r++,224|a>>>12),store(r++,128|a>>>6&63),store(r++,128|63&a)):a<=2097151?(store(r++,240|a>>>18),store(r++,128|a>>>12&63),store(r++,128|a>>>6&63),store(r++,128|63&a)):a<=67108863?(store(r++,248|a>>>24),store(r++,128|a>>>18&63),store(r++,128|a>>>12&63),store(r++,128|a>>>6&63),store(r++,128|63&a)):(store(r++,252|a>>>30),store(r++,128|a>>>24&63),store(r++,128|a>>>18&63),store(r++,128|a>>>12&63),store(r++,128|a>>>6&63),store(r++,128|63&a))}return store(r,0),t}function h(e){return load(e)|load(e+1)<<8|load(e+2)<<16|load(e+3)<<24}function d(e){if(!e)return null;for(var t,r,n,i,a,s=new Array;t=load(e++);)128&t?(r=63&load(e++),192!=(224&t)?(n=63&load(e++),224==(240&t)?t=(15&t)<<12|r<<6|n:(i=63&load(e++),240==(248&t)?t=(7&t)<<18|r<<12|n<<6|i:(a=63&load(e++),t=248==(252&t)?(3&t)<<24|r<<18|n<<12|i<<6|a:(1&t)<<30|r<<24|n<<18|i<<12|a<<6|63&load(e++))),s.push(t)):s.push((31&t)<<6|r)):s.push(t);return String.fromCodePoints(s)}t.Relooper=o,t.readString=d;var _=function(){return function(){}}();t.BinaryModule=_,t.needsExplicitUnreachable=function e(t){switch(_BinaryenExpressionGetType(t)){case 1:case 2:case 3:case 4:return!1}switch(_BinaryenExpressionGetId(t)){case n.Unreachable:case n.Return:return!1;case n.Break:return 0!=_BinaryenBreakGetCondition(t);case n.Block:if(!_BinaryenBlockGetName(t)){var r=_BinaryenBlockGetNumChildren(t);return r>0&&e(_BinaryenBlockGetChild(t,r-1))}}return!0}},function(e,t){var r;r=function(){return this}();try{r=r||Function("return this")()||(0,eval)("this")}catch(e){"object"==typeof window&&(r=window)}e.exports=r},function(e,t,r){"use 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this.size<=e.size;return!1},e.commonCompatible=function(e,t,r){return t.isAssignableTo(e,r)?e:e.isAssignableTo(t,r)?t:null},e.prototype.toString=function(e){if(void 0===e&&(e=!1),!e&&this.is(256)){var t=this.classReference;if(t)return this.is(512)?t.toString()+" | null":t.toString();var r=this.signatureReference;if(r)return this.is(512)?"("+r.toString(!0)+") | null":r.toString(!0);assert(!1)}switch(this.kind){case 0:return"i8";case 1:return"i16";case 2:return"i32";case 3:return"i64";case 4:return"isize";case 5:return"u8";case 6:return"u16";case 7:return"u32";case 8:return"u64";case 9:return"usize";case 10:return"bool";case 11:return"f32";case 12:return"f64";default:assert(!1);case 13:return"void"}},e.prototype.toNativeType=function(){switch(this.kind){default:return 1;case 3:case 8:return 2;case 4:case 9:return 64==this.size?2:1;case 11:return 3;case 12:return 4;case 13:return 0}},e.prototype.toNativeZero=function(e){switch(this.kind){case 13:assert(!1);default:return e.createI32(0);case 4:case 9:if(64!=this.size)return e.createI32(0);case 3:case 8:return e.createI64(0);case 11:return e.createF32(0);case 12:return e.createF64(0)}},e.prototype.toNativeOne=function(e){switch(this.kind){case 13:assert(!1);default:return e.createI32(1);case 4:case 9:if(64!=this.size)return e.createI32(1);case 3:case 8:return e.createI64(1);case 11:return e.createF32(1);case 12:return e.createF64(1)}},e.prototype.toNativeNegOne=function(e){switch(this.kind){case 13:assert(!1);default:return e.createI32(-1);case 4:case 9:if(64!=this.size)return e.createI32(-1);case 3:case 8:return e.createI64(-1,-1);case 11:return e.createF32(-1);case 12:return e.createF64(-1)}},e.prototype.toSignatureString=function(){switch(this.kind){default:return"i";case 3:case 8:return"I";case 4:case 9:return 64==this.size?"I":"i";case 11:return"f";case 12:return"F";case 13:return"v"}},e.i8=new e(0,165,8),e.i16=new e(1,165,16),e.i32=new e(2,133,32),e.i64=new e(3,197,64),e.isize32=new 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i.AMPERSAND_AMPERSAND:return"&&";case i.BAR_BAR:return"||";case i.EQUALS:return"=";case i.PLUS_EQUALS:return"+=";case i.MINUS_EQUALS:return"-=";case i.ASTERISK_EQUALS:return"*=";case i.ASTERISK_ASTERISK_EQUALS:return"**=";case i.SLASH_EQUALS:return"/=";case i.PERCENT_EQUALS:return"%=";case i.LESSTHAN_LESSTHAN_EQUALS:return"<<=";case i.GREATERTHAN_GREATERTHAN_EQUALS:return">>=";case i.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:return">>>=";case i.AMPERSAND_EQUALS:return"&=";case i.BAR_EQUALS:return"|=";case i.CARET_EQUALS:return"^=";default:return assert(!1),""}};var u=function(){function e(e,t,r){this.debugInfoRef=0,this.source=e,this.start=t,this.end=r}return e.join=function(t,r){if(t.source!=r.source)throw new Error("source mismatch");return new e(t.source,t.start<r.start?t.start:r.start,t.end>r.end?t.end:r.end)},Object.defineProperty(e.prototype,"atStart",{get:function(){return new e(this.source,this.start,this.start)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"atEnd",{get:function(){return new e(this.source,this.end,this.end)},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"line",{get:function(){for(var e=this.source.text,t=1,r=this.start;r>=0;--r)10==e.charCodeAt(r)&&t++;return t},enumerable:!0,configurable:!0}),Object.defineProperty(e.prototype,"column",{get:function(){for(var e=this.source.text,t=0,r=this.start-1;r>=0&&10!=e.charCodeAt(r);--r)++t;return t},enumerable:!0,configurable:!0}),e.prototype.toString=function(){return this.source.text.substring(this.start,this.end)},e}();t.Range=u;var h=function(e){function t(t,r){void 0===r&&(r=null);var n=e.call(this,r)||this;n.end=0,n.pos=0,n.token=-1,n.tokenPos=0,n.nextToken=-1,n.nextTokenPos=0,n.nextTokenOnNewLine=!1,n.onComment=null,n.source=t,n.pos=0,n.end=t.text.length,n.diagnostics=r||new Array;var i=t.text;if(n.pos<n.end&&65279==i.charCodeAt(n.pos)&&++n.pos,n.pos+1<n.end&&35==i.charCodeAt(n.pos)&&33==i.charCodeAt(n.pos+1))for(n.pos+=2;n.pos<n.end&&10!=i.charCodeAt(n.pos);)++n.pos;return n}return n(t,e),t.prototype.next=function(e){return void 0===e&&(e=a.DEFAULT),this.nextToken=-1,this.token=this.unsafeNext(e)},t.prototype.unsafeNext=function(e,t){void 0===e&&(e=a.DEFAULT),void 0===t&&(t=i32.MAX_VALUE);for(var r=this.source.text;this.pos<this.end;){this.tokenPos=this.pos;var n=r.charCodeAt(this.pos);switch(n){case 13:if(!(++this.pos<this.end&&10==r.charCodeAt(this.pos)))break;case 10:case 9:case 11:case 12:case 32:++this.pos;break;case 33:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.EXCLAMATION_EQUALS_EQUALS):i.EXCLAMATION_EQUALS):i.EXCLAMATION;case 34:case 39:case 96:return i.STRINGLITERAL;case 37:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.PERCENT_EQUALS):i.PERCENT;case 38:if(++this.pos,t>1&&this.pos<this.end){if(38==r.charCodeAt(this.pos))return++this.pos,i.AMPERSAND_AMPERSAND;if(61==r.charCodeAt(this.pos))return++this.pos,i.AMPERSAND_EQUALS}return i.AMPERSAND;case 40:return++this.pos,i.OPENPAREN;case 41:return++this.pos,i.CLOSEPAREN;case 42:if(++this.pos,t>1&&this.pos<this.end){if(61==r.charCodeAt(this.pos))return++this.pos,i.ASTERISK_EQUALS;if(42==r.charCodeAt(this.pos))return++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.ASTERISK_ASTERISK_EQUALS):i.ASTERISK_ASTERISK}return i.ASTERISK;case 43:if(++this.pos,t>1&&this.pos<this.end){if(43==r.charCodeAt(this.pos))return++this.pos,i.PLUS_PLUS;if(61==r.charCodeAt(this.pos))return++this.pos,i.PLUS_EQUALS}return i.PLUS;case 44:return++this.pos,i.COMMA;case 45:if(++this.pos,t>1&&this.pos<this.end){if(45==r.charCodeAt(this.pos))return++this.pos,i.MINUS_MINUS;if(61==r.charCodeAt(this.pos))return++this.pos,i.MINUS_EQUALS}return i.MINUS;case 46:if(++this.pos,t>1&&this.pos<this.end){if(c.isDecimalDigit(r.charCodeAt(this.pos)))return--this.pos,i.FLOATLITERAL;if(t>2&&this.pos+1<this.end&&46==r.charCodeAt(this.pos)&&46==r.charCodeAt(this.pos+1))return this.pos+=2,i.DOT_DOT_DOT}return i.DOT;case 47:var u=this.pos;if(++this.pos,t>1&&this.pos<this.end){if(47==r.charCodeAt(this.pos)){var h=o.CommentKind.LINE;for(this.pos+1<this.end&&47==r.charCodeAt(this.pos+1)&&(++this.pos,h=o.CommentKind.TRIPLE);++this.pos<this.end;)if(10==r.charCodeAt(this.pos)){++this.pos;break}this.onComment&&this.onComment(h,r.substring(u,this.pos),this.range(u,this.pos));break}if(42==r.charCodeAt(this.pos)){for(var d=!1;++this.pos<this.end;)if(42==(n=r.charCodeAt(this.pos))&&this.pos+1<this.end&&47==r.charCodeAt(this.pos+1)){this.pos+=2,d=!0;break}d?this.onComment&&this.onComment(o.CommentKind.BLOCK,r.substring(u,this.pos),this.range(u,this.pos)):this.error(s.DiagnosticCode._0_expected,this.range(this.pos),"*/");break}if(61==r.charCodeAt(this.pos))return++this.pos,i.SLASH_EQUALS}return i.SLASH;case 48:case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:return this.testInteger()?i.INTEGERLITERAL:i.FLOATLITERAL;case 58:return++this.pos,i.COLON;case 59:return++this.pos,i.SEMICOLON;case 60:if(++this.pos,t>1&&this.pos<this.end){if(60==r.charCodeAt(this.pos))return++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.LESSTHAN_LESSTHAN_EQUALS):i.LESSTHAN_LESSTHAN;if(61==r.charCodeAt(this.pos))return++this.pos,i.LESSTHAN_EQUALS}return i.LESSTHAN;case 61:if(++this.pos,t>1&&this.pos<this.end){if(61==r.charCodeAt(this.pos))return++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.EQUALS_EQUALS_EQUALS):i.EQUALS_EQUALS;if(62==r.charCodeAt(this.pos))return++this.pos,i.EQUALS_GREATERTHAN}return i.EQUALS;case 62:if(++this.pos,t>1&&this.pos<this.end){if(62==r.charCodeAt(this.pos)){if(++this.pos,t>2&&this.pos<this.end){if(62==r.charCodeAt(this.pos))return++this.pos,t>3&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS):i.GREATERTHAN_GREATERTHAN_GREATERTHAN;if(61==r.charCodeAt(this.pos))return++this.pos,i.GREATERTHAN_GREATERTHAN_EQUALS}return i.GREATERTHAN_GREATERTHAN}if(61==r.charCodeAt(this.pos))return++this.pos,i.GREATERTHAN_EQUALS}return i.GREATERTHAN;case 63:return++this.pos,i.QUESTION;case 91:return++this.pos,i.OPENBRACKET;case 93:return++this.pos,i.CLOSEBRACKET;case 94:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,i.CARET_EQUALS):i.CARET;case 123:return++this.pos,i.OPENBRACE;case 124:if(++this.pos,t>1&&this.pos<this.end){if(124==r.charCodeAt(this.pos))return++this.pos,i.BAR_BAR;if(61==r.charCodeAt(this.pos))return++this.pos,i.BAR_EQUALS}return i.BAR;case 125:return++this.pos,i.CLOSEBRACE;case 126:return++this.pos,i.TILDE;case 64:return++this.pos,i.AT;default:if(c.isIdentifierStart(n)){if(c.isKeywordCharacter(n)){for(var _=this.pos;++this.pos<this.end&&c.isIdentifierPart(n=r.charCodeAt(this.pos));)if(!c.isKeywordCharacter(n))return this.pos=_,i.IDENTIFIER;var m=l(r.substring(_,this.pos));if(m!=i.INVALID&&e!==a.ALWAYS&&(e!==a.PREFER||!p(m)))return m;this.pos=_}return i.IDENTIFIER}if(c.isWhiteSpace(n)){++this.pos;break}return this.error(s.DiagnosticCode.Invalid_character,this.range(this.pos,this.pos+1)),++this.pos,i.INVALID}}return i.ENDOFFILE},t.prototype.peek=function(e,t,r){void 0===e&&(e=!1),void 0===t&&(t=a.DEFAULT),void 0===r&&(r=i32.MAX_VALUE);var n=this.source.text;if(this.nextToken<0){var i=this.pos,s=this.token,o=this.tokenPos;if(this.nextToken=this.unsafeNext(t,r),this.nextTokenPos=this.tokenPos,e){this.nextTokenOnNewLine=!1;for(var l=i,p=this.nextTokenPos;l<p;++l)if(c.isLineBreak(n.charCodeAt(l))){this.nextTokenOnNewLine=!0;break}}this.pos=i,this.token=s,this.tokenPos=o}return this.nextToken},t.prototype.skipIdentifier=function(){return this.skip(i.IDENTIFIER,a.PREFER)},t.prototype.skipIdentifierName=function(){return this.skip(i.IDENTIFIER,a.ALWAYS)},t.prototype.skip=function(e,t){void 0===t&&(t=a.DEFAULT);var r=this.pos,n=this.token,s=this.tokenPos,o=i32.MAX_VALUE;switch(e){case i.GREATERTHAN:o=1}return this.token=this.unsafeNext(t,o),this.token==e?(this.nextToken=-1,!0):(this.pos=r,this.token=n,this.tokenPos=s,!1)},t.prototype.mark=function(){var e;return _?(e=_,_=null):e=new d,e.pos=this.pos,e.token=this.token,e.tokenPos=this.tokenPos,e},t.prototype.discard=function(e){_=e},t.prototype.reset=function(e){this.pos=e.pos,this.token=e.token,this.tokenPos=e.tokenPos,this.nextToken=-1},t.prototype.range=function(e,t){return void 0===e&&(e=-1),void 0===t&&(t=-1),e<0?(e=this.tokenPos,t=this.pos):t<0&&(t=e),new u(this.source,e,t)},t.prototype.readIdentifier=function(){for(var e=this.source.text,t=this.pos;++this.pos<this.end&&c.isIdentifierPart(e.charCodeAt(this.pos)););return e.substring(t,this.pos)},t.prototype.readString=function(){for(var e=this.source.text,t=e.charCodeAt(this.pos++),r=this.pos,n="";;){if(this.pos>=this.end){n+=e.substring(r,this.pos),this.error(s.DiagnosticCode.Unterminated_string_literal,this.range(r-1,this.end));break}var i=e.charCodeAt(this.pos);if(i==t){n+=e.substring(r,this.pos++);break}if(92!=i){if(c.isLineBreak(i)){n+=e.substring(r,this.pos),this.error(s.DiagnosticCode.Unterminated_string_literal,this.range(r-1,this.pos));break}++this.pos}else n+=e.substring(r,this.pos),n+=this.readEscapeSequence(),r=this.pos}return n},t.prototype.readEscapeSequence=function(){if(++this.pos>=this.end)return this.error(s.DiagnosticCode.Unexpected_end_of_text,this.range(this.end)),"";var e=this.source.text,t=e.charCodeAt(this.pos++);switch(t){case 48:return"\0";case 98:return"\b";case 116:return"\t";case 110:return"\n";case 118:return"\v";case 102:return"\f";case 114:return"\r";case 39:return"'";case 34:return'"';case 117:return this.pos<this.end&&123==e.charCodeAt(this.pos)?(++this.pos,this.readExtendedUnicodeEscape()):this.readUnicodeEscape();case 13:this.pos<this.end&&10==e.charCodeAt(this.pos)&&++this.pos;case 10:case 8232:case 8233:return"";default:return String.fromCharCode(t)}},t.prototype.readRegexpPattern=function(){for(var e=this.source.text,t=this.pos,r=!1;;){if(this.pos>=this.end){this.error(s.DiagnosticCode.Unterminated_regular_expression_literal,this.range(t,this.end));break}if(92!=e.charCodeAt(this.pos)){var n=e.charCodeAt(this.pos);if(47==n&&!r)break;if(c.isLineBreak(n)){this.error(s.DiagnosticCode.Unterminated_regular_expression_literal,this.range(t,this.pos));break}++this.pos,r=!1}else++this.pos,r=!0}return e.substring(t,this.pos)},t.prototype.readRegexpFlags=function(){for(var e=this.source.text,t=this.pos,r=0;this.pos<this.end;){var n=e.charCodeAt(this.pos);if(!c.isIdentifierPart(n))break;switch(++this.pos,n){case 103:r|=1&r?-1:1;break;case 105:r|=2&r?-1:2;break;case 109:r|=4&r?-1:4;break;default:r=-1}}return-1==r&&this.error(s.DiagnosticCode.Invalid_regular_expression_flags,this.range(t,this.pos)),e.substring(t,this.pos)},t.prototype.testInteger=function(){var e=this.source.text;if(48==e.charCodeAt(this.pos)&&this.pos+1<this.end)switch(e.charCodeAt(this.pos+2)){case 88:case 120:case 66:case 98:case 79:case 111:return!0}for(var t=this.pos;t<this.end;){var r=e.charCodeAt(t);if(46==r||69==r||101==r)return!1;if((r<48||r>57)&&95!=r)break;t++}return!0},t.prototype.readInteger=function(){var e=this.source.text;if(48==e.charCodeAt(this.pos)&&this.pos+2<this.end){switch(e.charCodeAt(this.pos+1)){case 88:case 120:return this.pos+=2,this.readHexInteger();case 66:case 98:return this.pos+=2,this.readBinaryInteger();case 79:case 111:return this.pos+=2,this.readOctalInteger()}if(c.isOctalDigit(e.charCodeAt(this.pos+1))){var t=this.pos;++this.pos;var r=this.readOctalInteger();return this.error(s.DiagnosticCode.Octal_literals_are_not_allowed_in_strict_mode,this.range(t,this.pos)),r}}return this.readDecimalInteger()},t.prototype.readHexInteger=function(){for(var e=this.source.text,t=this.pos,r=i64_new(0,0),n=i64_new(16,0),i=t;this.pos<this.end;){var a=this.pos,o=e.charCodeAt(a);if(o>=48&&o<=57)r=i64_add(i64_mul(r,n),i64_new(o-48,0));else if(o>=65&&o<=70)r=i64_add(i64_mul(r,n),i64_new(10+o-65,0));else if(o>=97&&o<=102)r=i64_add(i64_mul(r,n),i64_new(10+o-97,0));else{if(95!=o)break;i==a&&this.error(i==t?s.DiagnosticCode.Numeric_separators_are_not_allowed_here:s.DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,this.range(a)),i=a+1}this.pos=a+1}return this.pos==t?this.error(s.DiagnosticCode.Hexadecimal_digit_expected,this.range(t)):i==this.pos&&this.error(s.DiagnosticCode.Numeric_separators_are_not_allowed_here,this.range(i-1)),r},t.prototype.readDecimalInteger=function(){for(var e=this.source.text,t=this.pos,r=i64_new(0,0),n=i64_new(10,0),i=t;this.pos<this.end;){var a=this.pos,o=e.charCodeAt(a);if(o>=48&&o<=57)r=i64_add(i64_mul(r,n),i64_new(o-48,0));else{if(95!=o)break;i==a&&this.error(i==t?s.DiagnosticCode.Numeric_separators_are_not_allowed_here:s.DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,this.range(a)),i=a+1}this.pos=a+1}return this.pos==t?this.error(s.DiagnosticCode.Digit_expected,this.range(t)):i==this.pos&&this.error(s.DiagnosticCode.Numeric_separators_are_not_allowed_here,this.range(i-1)),r},t.prototype.readOctalInteger=function(){for(var e=this.source.text,t=this.pos,r=i64_new(0,0),n=i64_new(8,0),i=t;this.pos<this.end;){var a=this.pos,o=e.charCodeAt(a);if(o>=48&&o<=55)r=i64_add(i64_mul(r,n),i64_new(o-48,0));else{if(95!=o)break;i==a&&this.error(i==t?s.DiagnosticCode.Numeric_separators_are_not_allowed_here:s.DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,this.range(a)),i=a+1}++this.pos}return this.pos==t?this.error(s.DiagnosticCode.Octal_digit_expected,this.range(t)):i==this.pos&&this.error(s.DiagnosticCode.Numeric_separators_are_not_allowed_here,this.range(i-1)),r},t.prototype.readBinaryInteger=function(){for(var e=this.source.text,t=this.pos,r=i64_new(0,0),n=i64_new(2,0),i=i64_new(1,0),a=t;this.pos<this.end;){var o=this.pos,c=e.charCodeAt(o);if(48==c)r=i64_mul(r,n);else if(49==c)r=i64_add(i64_mul(r,n),i);else{if(95!=c)break;a==o&&this.error(a==t?s.DiagnosticCode.Numeric_separators_are_not_allowed_here:s.DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,this.range(o)),a=o+1}this.pos=o+1}return this.pos==t?this.error(s.DiagnosticCode.Binary_digit_expected,this.range(t)):a==this.pos&&this.error(s.DiagnosticCode.Numeric_separators_are_not_allowed_here,this.range(a-1)),r},t.prototype.readFloat=function(){return this.readDecimalFloat()},t.prototype.readDecimalFloat=function(){for(var e=this.pos,t=this.source.text;this.pos<this.end&&c.isDecimalDigit(t.charCodeAt(this.pos));)++this.pos;if(this.pos<this.end&&46==t.charCodeAt(this.pos))for(++this.pos;this.pos<this.end&&c.isDecimalDigit(t.charCodeAt(this.pos));)++this.pos;if(this.pos<this.end){var r=t.charCodeAt(this.pos);if(69==r||101==r)for(++this.pos<this.end&&(45==t.charCodeAt(this.pos)||43==t.charCodeAt(this.pos))&&c.isDecimalDigit(t.charCodeAt(this.pos+1))&&++this.pos;this.pos<this.end&&c.isDecimalDigit(t.charCodeAt(this.pos));)++this.pos}return parseFloat(t.substring(e,this.pos))},t.prototype.readHexFloat=function(){throw new Error("not implemented")},t.prototype.readUnicodeEscape=function(){for(var e=4,t=0,r=this.source.text;this.pos<this.end;){var n=r.charCodeAt(this.pos++);if(n>=48&&n<=57)t=16*t+n-48;else if(n>=65&&n<=70)t=16*t+10+n-65;else{if(!(n>=97&&n<=102))return this.error(s.DiagnosticCode.Hexadecimal_digit_expected,this.range(this.pos-1,this.pos)),"";t=16*t+10+n-97}if(0==--e)break}return e?(this.error(s.DiagnosticCode.Unexpected_end_of_text,this.range(this.pos)),""):String.fromCharCode(t)},t.prototype.readExtendedUnicodeEscape=function(){var e=this.pos,t=this.readHexInteger(),r=i64_low(t),n=!1;assert(!i64_high(t)),r>1114111&&(this.error(s.DiagnosticCode.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive,this.range(e,this.pos)),n=!0);var i=this.source.text;return this.pos>=this.end?(this.error(s.DiagnosticCode.Unexpected_end_of_text,this.range(e,this.end)),n=!0):125==i.charCodeAt(this.pos)?++this.pos:(this.error(s.DiagnosticCode.Unterminated_Unicode_escape_sequence,this.range(e,this.pos)),n=!0),n?"":r<65536?String.fromCharCode(r):String.fromCharCode(55296+((r-65536)/1024|0),(r-65536)%1024+56320)},t.prototype.finish=function(){},t}(s.DiagnosticEmitter);t.Tokenizer=h;var d=function(){return function(){}}();t.State=d;var _=null},function(e,t,r){"use strict";var n=this&&this.__extends||function(){var e=function(t,r){return(e=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(e,t){e.__proto__=t}||function(e,t){for(var r in t)t.hasOwnProperty(r)&&(e[r]=t[r])})(t,r)};return function(t,r){function n(){this.constructor=t}e(t,r),t.prototype=null===r?Object.create(r):(n.prototype=r.prototype,new n)}}(),i=this&&this.__values||function(e){var t="function"==typeof Symbol&&e[Symbol.iterator],r=0;return t?t.call(e):{next:function(){return e&&r>=e.length&&(e=void 0),{value:e&&e[r++],done:!e}}}},a=this&&this.__read||function(e,t){var r="function"==typeof Symbol&&e[Symbol.iterator];if(!r)return e;var n,i,a=r.call(e),s=[];try{for(;(void 0===t||t-- >0)&&!(n=a.next()).done;)s.push(n.value)}catch(e){i={error:e}}finally{try{n&&!n.done&&(r=a.return)&&r.call(a)}finally{if(i)throw i.error}}return s};Object.defineProperty(t,"__esModule",{value:!0});var 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g),n.options=r,n.memoryOffset=i64_new(max(r.memoryBase,8)),n.module=l.Module.create(),n}return n(t,e),t.compile=function(e,r){return void 0===r&&(r=null),new t(e,r).compile()},t.prototype.compile=function(){var e,t,r=this.options,n=this.module,s=this.program;s.initialize(r);var c=new u.Function(s.startFunction,"start",new _.Signature([],_.Type.void));this.startFunctionInstance=c;var p=new Array;this.startFunctionBody=p,this.currentFunction=c;for(var h=s.sources,d=0,m=h.length;d<m;++d)h[d].isEntry&&this.compileSource(h[d]);if(p.length||null!==s.mainFunction){var g=c.signature,y=n.addFunction(c.internalName,this.ensureFunctionType(g.parameterTypes,g.returnType,g.thisType),_.typesToNativeTypes(c.additionalLocals),n.createBlock(null,p));c.finalize(n,y),s.mainFunction||n.setStart(y)}var E=this.memoryOffset;E=i64_align(E,r.usizeType.byteSize),this.memoryOffset=E,r.isWasm64?n.addGlobal("HEAP_BASE",2,!1,n.createI64(i64_low(E),i64_high(E))):n.addGlobal("HEAP_BASE",1,!1,n.createI32(i64_low(E)));var f=this.memorySegments.length?i64_low(i64_shr_u(i64_align(E,65536),i64_new(16,0))):0;n.setMemory(f,this.options.isWasm64?l.Module.MAX_MEMORY_WASM64:l.Module.MAX_MEMORY_WASM32,this.memorySegments,r.target,"memory"),r.importMemory&&n.addMemoryImport("0","env","memory");var T=this.functionTable,I=!1;T.length&&(n.setFunctionTable(T),n.addTableExport("0","table"),I=!0),r.importTable&&(n.addTableImport("0","env","table"),I||n.addTableExport("0","table"));try{for(var v=i(s.moduleLevelExports),A=v.next();!A.done;A=v.next()){var C=a(A.value,2),N=C[0],O=C[1];this.makeModuleExport(N,O.element)}}catch(t){e={error:t}}finally{try{A&&!A.done&&(t=v.return)&&t.call(v)}finally{if(e)throw e.error}}return this.needsIterateRoots&&o.compileIterateRoots(this),n},t.prototype.makeModuleExport=function(e,t,r){var n,a,s,o,l,h,d,m;void 0===r&&(r="");var g=t.members;if(g){var y=r+e+(t.kind==u.ElementKind.CLASS?p.INSTANCE_DELIMITER:p.STATIC_DELIMITER);if(t.kind==u.ElementKind.NAMESPACE)try{for(var E=i(g.values()),f=E.next();!f.done;f=E.next()){(v=f.value).is(p.CommonFlags.EXPORT)&&this.makeModuleExport(v.simpleName,v,y)}}catch(e){n={error:e}}finally{try{f&&!f.done&&(a=E.return)&&a.call(E)}finally{if(n)throw n.error}}else try{for(var T=i(g.values()),I=T.next();!I.done;I=T.next()){var v;(v=I.value).is(p.CommonFlags.PRIVATE)||this.makeModuleExport(v.simpleName,v,y)}}catch(e){s={error:e}}finally{try{I&&!I.done&&(o=T.return)&&o.call(T)}finally{if(s)throw s.error}}}switch(t.kind){case u.ElementKind.GLOBAL:if(t.is(p.CommonFlags.CONST)||t.is(p.CommonFlags.STATIC|p.CommonFlags.READONLY)||this.options.hasFeature(2))this.module.addGlobalExport(t.internalName,r+e);else(A=t.declaration)&&this.error(c.DiagnosticCode.Cannot_export_a_mutable_global,A.name.range);break;case u.ElementKind.ENUMVALUE:var A;if(assert(t.parent).is(p.CommonFlags.CONST)||this.options.hasFeature(2))this.module.addGlobalExport(t.internalName,r+e);else(A=t.declaration)&&this.error(c.DiagnosticCode.Cannot_export_a_mutable_global,A.name.range);break;case u.ElementKind.FUNCTION:var C=(G=t).signature;C.requiredParameters<C.parameterTypes.length&&(G=this.ensureTrampoline(G),this.ensureArgcSet()),G.is(p.CommonFlags.COMPILED)&&this.module.addFunctionExport(G.internalName,r+e);break;case u.ElementKind.PROPERTY:var N=assert(t.getterPrototype);this.makeModuleExport(p.GETTER_PREFIX+e,N,r);var O=t.setterPrototype;O&&this.makeModuleExport(p.SETTER_PREFIX+e,O,r);break;case u.ElementKind.FIELD:var S=this.module,L=t.type,b=L.toNativeType(),k=t.memoryOffset,R=this.options.usizeType,x=this.options.nativeSizeType,F=r+p.GETTER_PREFIX+e;if(S.addFunction(F,this.ensureFunctionType(null,L,R),null,S.createLoad(L.byteSize,L.is(1),S.createGetLocal(0,x),b,k)),S.addFunctionExport(F,F),!t.is(p.CommonFlags.READONLY)){var D=r+p.SETTER_PREFIX+e;S.addFunction(D,this.ensureFunctionType([L],_.Type.void,R),null,S.createStore(L.byteSize,S.createGetLocal(0,x),S.createGetLocal(1,b),b,k)),S.addFunctionExport(D,D)}break;case u.ElementKind.FUNCTION_PROTOTYPE:try{for(var B=i(t.instances.values()),U=B.next();!U.done;U=B.next()){var P=e;if((G=U.value).is(p.CommonFlags.GENERIC))P+=(K=G.internalName).substring(K.lastIndexOf("<"));this.makeModuleExport(P,G,r)}}catch(e){l={error:e}}finally{try{U&&!U.done&&(h=B.return)&&h.call(B)}finally{if(l)throw l.error}}break;case u.ElementKind.CLASS_PROTOTYPE:try{for(var w=i(t.instances.values()),M=w.next();!M.done;M=w.next()){var G,K;P=e;if((G=M.value).is(p.CommonFlags.GENERIC))P+=(K=G.internalName).substring(K.lastIndexOf("<"));var z=G.constructorInstance;z&&this.makeModuleExport(P+p.INSTANCE_DELIMITER+z.simpleName,z,r),this.makeModuleExport(P,G,r)}}catch(e){d={error:e}}finally{try{M&&!M.done&&(m=w.return)&&m.call(w)}finally{if(d)throw d.error}}break;case u.ElementKind.ENUM:case u.ElementKind.CLASS:case u.ElementKind.NAMESPACE:break;default:assert(!1)}},t.prototype.compileSourceByPath=function(e,t){var r=this.program.lookupSourceByPath(e);r?this.compileSource(r):this.error(c.DiagnosticCode.File_0_not_found,t.range,e)},t.prototype.compileSource=function(e){if(!e.is(p.CommonFlags.COMPILED)){e.set(p.CommonFlags.COMPILED);for(var t=this.options.noTreeShaking,r=e.isEntry,n=this.startFunctionInstance,i=this.startFunctionBody,a=e.statements,s=0,o=a.length;s<o;++s){var c=a[s];switch(c.kind){case d.NodeKind.CLASSDECLARATION:(t||r&&c.is(p.CommonFlags.EXPORT))&&!c.isGeneric&&this.compileClassDeclaration(c,[],null);break;case d.NodeKind.INTERFACEDECLARATION:break;case d.NodeKind.ENUMDECLARATION:(t||r&&c.is(p.CommonFlags.EXPORT))&&this.compileEnumDeclaration(c);break;case d.NodeKind.FUNCTIONDECLARATION:(t||r&&c.is(p.CommonFlags.EXPORT))&&!c.isGeneric&&this.compileFunctionDeclaration(c,[]);break;case d.NodeKind.IMPORT:this.compileSourceByPath(c.normalizedPath,c.path);break;case d.NodeKind.NAMESPACEDECLARATION:(t||r&&c.is(p.CommonFlags.EXPORT))&&this.compileNamespaceDeclaration(c);break;case d.NodeKind.VARIABLE:var l=this.compileVariableStatement(c);l&&i.push(l);break;case d.NodeKind.EXPORT:null!=c.normalizedPath&&this.compileSourceByPath(c.normalizedPath,c.path),(t||r)&&this.compileExportStatement(c);break;default:var u=this.currentFunction;this.currentFunction=n,i.push(this.compileStatement(c)),this.currentFunction=u}}}},t.prototype.compileGlobalDeclaration=function(e){var t=assert(this.program.elementsLookup.get(e.fileLevelInternalName));return assert(t.kind==u.ElementKind.GLOBAL),this.compileGlobal(t)?t:null},t.prototype.compileGlobal=function(e){if(e.is(p.CommonFlags.COMPILED))return!0;e.set(p.CommonFlags.COMPILED);var t=this.module,r=e.declaration,n=0;if(e.type==_.Type.void)if(r)if(r.type){var i=this.resolver.resolveType(r.type);if(!i)return!1;if(i==_.Type.void)return this.error(c.DiagnosticCode.Type_expected,r.type.range),!1;e.type=i}else{if(!r.initializer)return this.error(c.DiagnosticCode.Type_expected,r.name.range.atEnd),!1;if(n=this.compileExpressionRetainType(r.initializer,_.Type.void,1),this.currentType==_.Type.void)return this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,r.initializer.range,this.currentType.toString(),"<auto>"),!1;e.type=this.currentType}else assert(!1);if(e.is(p.CommonFlags.AMBIENT)&&e.hasDecorator(u.DecoratorFlags.BUILTIN))return!0;var a=e.type.toNativeType(),s=e.is(p.CommonFlags.CONST)||e.is(p.CommonFlags.STATIC|p.CommonFlags.READONLY);if(e.is(p.CommonFlags.AMBIENT))return s||this.options.hasFeature(2)?(e.set(p.CommonFlags.MODULE_IMPORT),r?T(e,r,e.parent):(y="env",E=e.simpleName),t.addGlobalImport(e.internalName,y,E,a),e.set(p.CommonFlags.COMPILED),!0):(this.error(c.DiagnosticCode.Operation_not_supported,assert(r).range),!1);var o=!1;if(null!==r&&null!==r.initializer){if(n||(n=this.compileExpression(r.initializer,e.type,1,1)),l.getExpressionId(n)!=l.ExpressionId.Const&&(s?(n=t.precomputeExpression(n),l.getExpressionId(n)!=l.ExpressionId.Const&&(this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,r.range),o=!0)):o=!0),e.hasDecorator(u.DecoratorFlags.INLINE)&&!o){switch(assert(l.getExpressionId(n)==l.ExpressionId.Const),l.getExpressionType(n)){case 1:e.constantValueKind=1,e.constantIntegerValue=i64_new(l.getConstValueI32(n),0);break;case 2:e.constantValueKind=1,e.constantIntegerValue=i64_new(l.getConstValueI64Low(n),l.getConstValueI64High(n));break;case 3:e.constantValueKind=2,e.constantFloatValue=l.getConstValueF32(n);break;case 4:e.constantValueKind=2,e.constantFloatValue=l.getConstValueF64(n);break;default:return assert(!1),!1}e.set(p.CommonFlags.INLINED)}}else n=e.type.toNativeZero(t);var h=e.internalName;return o?(t.addGlobal(h,a,!0,e.type.toNativeZero(t)),this.startFunctionBody.push(t.createSetGlobal(h,n))):t.addGlobal(h,a,!s,n),!0},t.prototype.compileEnumDeclaration=function(e){var t=assert(this.program.elementsLookup.get(e.fileLevelInternalName));return assert(t.kind==u.ElementKind.ENUM),this.compileEnum(t)?t:null},t.prototype.compileEnum=function(e){var t,r;if(e.is(p.CommonFlags.COMPILED))return!0;e.set(p.CommonFlags.COMPILED);var n=this.module;this.currentEnum=e;var a=null,s=!1;if(e.members)try{for(var o=i(e.members.values()),h=o.next();!h.done;h=o.next()){var d=h.value;if(d.kind==u.ElementKind.ENUMVALUE){var m=!1,g=d,y=g.declaration;g.set(p.CommonFlags.COMPILED);var E=void 0;y.value?(E=this.compileExpression(y.value,_.Type.i32,1,0),l.getExpressionId(E)!=l.ExpressionId.Const&&(e.is(p.CommonFlags.CONST)?(E=n.precomputeExpression(E),l.getExpressionId(E)!=l.ExpressionId.Const&&(this.error(c.DiagnosticCode.In_const_enum_declarations_member_initializer_must_be_constant_expression,y.value.range),m=!0)):m=!0)):null==a?E=n.createI32(0):(s&&this.error(c.DiagnosticCode.Enum_member_must_have_initializer,y.range),E=n.createBinary(l.BinaryOp.AddI32,n.createGetGlobal(a.internalName,1),n.createI32(1)),E=n.precomputeExpression(E),l.getExpressionId(E)!=l.ExpressionId.Const&&(e.is(p.CommonFlags.CONST)&&this.error(c.DiagnosticCode.In_const_enum_declarations_member_initializer_must_be_constant_expression,y.range),m=!0)),m?(n.addGlobal(g.internalName,1,!0,n.createI32(0)),this.startFunctionBody.push(n.createSetGlobal(g.internalName,E)),s=!0):(n.addGlobal(g.internalName,1,!e.is(p.CommonFlags.CONST),E),s=!1),a=g}}}catch(e){t={error:e}}finally{try{h&&!h.done&&(r=o.return)&&r.call(o)}finally{if(t)throw t.error}}return this.currentEnum=null,!0},t.prototype.compileFunctionDeclaration=function(e,t,r){void 0===r&&(r=null);var n=assert(this.program.elementsLookup.get(e.fileLevelInternalName));return assert(n.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.compileFunctionUsingTypeArguments(n,t,r,null,n.declaration.name)},t.prototype.compileFunctionUsingTypeArguments=function(e,t,r,n,i){var a=this.resolver.resolveFunctionInclTypeArguments(e,t,r,i);return a?(a.outerScope=n,this.compileFunction(a)?a:null):null},t.prototype.ensureFunctionType=function(e,t,r){void 0===r&&(r=null);var n,i=e?e.length:0,a=0;if(r?((n=new Array(1+i))[0]=r.toNativeType(),a=1):n=new Array(i),e)for(var s=0;s<i;++s,++a)n[a]=e[s].toNativeType();var o=t.toNativeType(),c=this.module,l=c.getFunctionTypeBySignature(o,n);if(!l){var p=_.Signature.makeSignatureString(e,t,r);l=c.addFunctionType(p,o,n)}return l},t.prototype.compileFunction=function(e){if(e.is(p.CommonFlags.COMPILED))return!0;assert(!(e.is(p.CommonFlags.AMBIENT)&&e.hasDecorator(u.DecoratorFlags.BUILTIN))),e.set(p.CommonFlags.COMPILED);var t,r=e.prototype.declaration,n=r.body;n?e.is(p.CommonFlags.AMBIENT)&&this.error(c.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,r.name.range):e.is(p.CommonFlags.AMBIENT)||this.error(c.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,r.name.range);var i=e.signature,a=this.ensureFunctionType(i.parameterTypes,i.returnType,i.thisType),s=this.module;if(n){var o=e.is(p.CommonFlags.CONSTRUCTOR),h=e.signature.returnType,m=this.currentFunction;this.currentFunction=e;var g=e.flow,f=void 0;if(n.kind==d.NodeKind.EXPRESSION)assert(!e.isAny(p.CommonFlags.CONSTRUCTOR|p.CommonFlags.GET|p.CommonFlags.SET|p.CommonFlags.MAIN)),assert(e.is(p.CommonFlags.ARROW)),f=this.compileExpression(n.expression,h,1,0),g.set(1),g.canOverflow(f,h)||g.set(2),g.finalize();else{assert(n.kind==d.NodeKind.BLOCK);var I=this.compileStatements(n.statements);if(e.is(p.CommonFlags.MAIN)&&(s.addGlobal("~started",1,!0,s.createI32(0)),I.unshift(s.createIf(s.createUnary(l.UnaryOp.EqzI32,s.createGetGlobal("~started",1)),s.createBlock(null,[s.createCall("start",null,0),s.createSetGlobal("~started",s.createI32(1))])))),g.finalize(),o){var v=this.options.nativeSizeType;if(assert(e.is(p.CommonFlags.INSTANCE)),!g.is(1))if(g.is(32))I.push(s.createGetLocal(0,v));else{var A=assert(e.parent);assert(A.kind==u.ElementKind.CLASS),I.push(s.createTeeLocal(0,this.makeConditionalAllocate(A,r.name)))}}else h==_.Type.void||g.is(1)||this.error(c.DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,r.signature.returnType.range);f=I.length?1==I.length?I[0]:s.createBlock(null,I,h.toNativeType()):s.createNop()}if(this.currentFunction=m,t=s.addFunction(e.internalName,a,_.typesToNativeTypes(e.additionalLocals),f),e.hasDecorator(u.DecoratorFlags.EXTERNAL)){var C=assert(d.findDecorator(d.DecoratorKind.EXTERNAL,r.decorators));this.error(c.DiagnosticCode.Operation_not_supported,C.range)}}else e.set(p.CommonFlags.MODULE_IMPORT),T(e,r,e.prototype.parent),t=s.addFunctionImport(e.internalName,y,E,a);return e.finalize(s,t),!0},t.prototype.compileNamespaceDeclaration=function(e){for(var t=e.members,r=this.options.noTreeShaking,n=0,i=t.length;n<i;++n){var a=t[n];switch(a.kind){case d.NodeKind.CLASSDECLARATION:!r&&!a.is(p.CommonFlags.EXPORT)||a.isGeneric||this.compileClassDeclaration(a,[]);break;case d.NodeKind.INTERFACEDECLARATION:!r&&!a.is(p.CommonFlags.EXPORT)||a.isGeneric||this.compileInterfaceDeclaration(a,[]);break;case d.NodeKind.ENUMDECLARATION:(r||a.is(p.CommonFlags.EXPORT))&&this.compileEnumDeclaration(a);break;case d.NodeKind.FUNCTIONDECLARATION:!r&&!a.is(p.CommonFlags.EXPORT)||a.isGeneric||this.compileFunctionDeclaration(a,[]);break;case d.NodeKind.NAMESPACEDECLARATION:(r||a.is(p.CommonFlags.EXPORT))&&this.compileNamespaceDeclaration(a);break;case d.NodeKind.VARIABLE:if(r||a.is(p.CommonFlags.EXPORT)){var s=this.compileVariableStatement(a,!0);s&&this.startFunctionBody.push(s)}break;default:assert(!1)}}},t.prototype.compileNamespace=function(e){var t,r;if(e.members){var n=this.options.noTreeShaking;try{for(var a=i(e.members.values()),s=a.next();!s.done;s=a.next()){var o=s.value;switch(o.kind){case u.ElementKind.CLASS_PROTOTYPE:!n&&!o.is(p.CommonFlags.EXPORT)||o.is(p.CommonFlags.GENERIC)||this.compileClassUsingTypeArguments(o,[]);break;case u.ElementKind.ENUM:this.compileEnum(o);break;case u.ElementKind.FUNCTION_PROTOTYPE:if((n||o.is(p.CommonFlags.EXPORT))&&!o.is(p.CommonFlags.GENERIC)){if(o.hasDecorator(u.DecoratorFlags.BUILTIN))break;this.compileFunctionUsingTypeArguments(o,[],null,null,o.declaration.name)}break;case u.ElementKind.GLOBAL:this.compileGlobal(o);break;case u.ElementKind.NAMESPACE:this.compileNamespace(o)}}}catch(e){t={error:e}}finally{try{s&&!s.done&&(r=a.return)&&r.call(a)}finally{if(t)throw t.error}}}},t.prototype.compileExportStatement=function(e){var t=this.program.fileLevelExports,r=e.members;if(r)for(var n=0,i=r.length;n<i;++n){var a=r[n],s=t.get(e.range.source.internalPath+p.PATH_DELIMITER+a.externalName.text);if(s)switch(s.kind){case u.ElementKind.CLASS_PROTOTYPE:s.is(p.CommonFlags.GENERIC)||this.compileClassUsingTypeArguments(s,[]);break;case u.ElementKind.ENUM:this.compileEnum(s);break;case u.ElementKind.FUNCTION_PROTOTYPE:!s.is(p.CommonFlags.GENERIC)&&e.range.source.isEntry&&this.compileFunctionUsingTypeArguments(s,[],null,null,s.declaration.name);break;case u.ElementKind.GLOBAL:this.compileGlobal(s);break;case u.ElementKind.NAMESPACE:this.compileNamespace(s)}}},t.prototype.compileClassDeclaration=function(e,t,r){void 0===r&&(r=null);var n=assert(this.program.elementsLookup.get(e.fileLevelInternalName));assert(n.kind==u.ElementKind.CLASS_PROTOTYPE),this.compileClassUsingTypeArguments(n,t,r,e)},t.prototype.compileClassUsingTypeArguments=function(e,t,r,n){void 0===r&&(r=null),void 0===n&&(n=null);var i=this.resolver.resolveClassInclTypeArguments(e,t,r,n||e.declaration);i&&this.compileClass(i)},t.prototype.compileClass=function(e){var t,r,n,a;if(e.is(p.CommonFlags.COMPILED))return!0;e.set(p.CommonFlags.COMPILED);var s=e.prototype.members;if(s)try{for(var o=i(s.values()),c=o.next();!c.done;c=o.next()){switch((m=c.value).kind){case u.ElementKind.GLOBAL:this.compileGlobal(m);break;case u.ElementKind.FUNCTION_PROTOTYPE:m.is(p.CommonFlags.GENERIC)||this.compileFunctionUsingTypeArguments(m,[],null,null,m.declaration.name);break;case u.ElementKind.PROPERTY:(g=m.getterPrototype)&&this.compileFunctionUsingTypeArguments(g,[],null,null,g.declaration.name),(y=m.setterPrototype)&&this.compileFunctionUsingTypeArguments(y,[],null,null,y.declaration.name)}}}catch(e){t={error:e}}finally{try{c&&!c.done&&(r=o.return)&&r.call(o)}finally{if(t)throw t.error}}var l=e.constructorInstance;l&&this.compileFunction(l);var h=e.members;if(h)try{for(var d=i(h.values()),_=d.next();!_.done;_=d.next()){var m;switch((m=_.value).kind){case u.ElementKind.FUNCTION_PROTOTYPE:m.is(p.CommonFlags.GENERIC)||this.compileFunctionUsingTypeArguments(m,[],e.contextualTypeArguments,null,m.declaration.name);break;case u.ElementKind.FIELD:m.set(p.CommonFlags.COMPILED);break;case u.ElementKind.PROPERTY:var g,y;(g=m.getterPrototype)&&this.compileFunctionUsingTypeArguments(g,[],e.contextualTypeArguments,null,g.declaration.name),(y=m.setterPrototype)&&this.compileFunctionUsingTypeArguments(y,[],e.contextualTypeArguments,null,y.declaration.name)}}}catch(e){n={error:e}}finally{try{_&&!_.done&&(a=d.return)&&a.call(d)}finally{if(n)throw n.error}}return!0},t.prototype.compileInterfaceDeclaration=function(e,t,r,n){void 0===r&&(r=null),void 0===n&&(n=null),this.error(c.DiagnosticCode.Operation_not_supported,e.range)},t.prototype.addMemorySegment=function(e,t){void 0===t&&(t=8);var r=i64_align(this.memoryOffset,t),n=l.MemorySegment.create(e,r);return this.memorySegments.push(n),this.memoryOffset=i64_add(r,i64_new(e.length,0)),n},t.prototype.ensureFunctionTableEntry=function(e){if(assert(e.is(p.CommonFlags.COMPILED)),e.functionTableIndex>=0)return e.functionTableIndex;var t=this.functionTable,r=t.length;return!e.is(p.CommonFlags.TRAMPOLINE)&&e.signature.requiredParameters<e.signature.parameterTypes.length&&(e=this.ensureTrampoline(e)),t.push(e.ref),e.functionTableIndex=r,r},t.prototype.compileStatement=function(e){var t,r=this.module;switch(e.kind){case d.NodeKind.BLOCK:t=this.compileBlockStatement(e);break;case d.NodeKind.BREAK:t=this.compileBreakStatement(e);break;case d.NodeKind.CONTINUE:t=this.compileContinueStatement(e);break;case d.NodeKind.DO:t=this.compileDoStatement(e);break;case d.NodeKind.EMPTY:t=this.compileEmptyStatement(e);break;case d.NodeKind.EXPRESSION:t=this.compileExpressionStatement(e);break;case d.NodeKind.FOR:t=this.compileForStatement(e);break;case d.NodeKind.IF:t=this.compileIfStatement(e);break;case d.NodeKind.RETURN:t=this.compileReturnStatement(e);break;case d.NodeKind.SWITCH:t=this.compileSwitchStatement(e);break;case d.NodeKind.THROW:t=this.compileThrowStatement(e);break;case d.NodeKind.TRY:t=this.compileTryStatement(e);break;case d.NodeKind.VARIABLE:(t=this.compileVariableStatement(e))||(t=r.createNop());break;case d.NodeKind.VOID:t=this.compileVoidStatement(e);break;case d.NodeKind.WHILE:t=this.compileWhileStatement(e);break;case d.NodeKind.TYPEDECLARATION:if(this.currentFunction==this.startFunctionInstance)return r.createNop();default:assert(!1),t=r.createUnreachable()}return this.options.sourceMap&&this.addDebugLocation(t,e.range),t},t.prototype.compileStatements=function(e){var t=e.length,r=new Array(t);r.length=0;for(var n=this.currentFunction.flow,i=0;i<t;++i){var a=this.compileStatement(e[i]);switch(l.getExpressionId(a)){case l.ExpressionId.Block:if(!l.getBlockName(a)){for(var s=0,o=l.getBlockChildCount(a);s<o;++s)r.push(l.getBlockChild(a,s));break}default:r.push(a);case l.ExpressionId.Nop:}if(n.isAny(29)){l.needsExplicitUnreachable(a)&&r.push(this.module.createUnreachable());break}}return r},t.prototype.compileBlockStatement=function(e){var t=e.statements,r=this.currentFunction.flow,n=r.fork();this.currentFunction.flow=n;var i=this.compileStatements(t),a=0==i.length?this.module.createNop():1==i.length?i[0]:this.module.createBlock(null,i,l.getExpressionType(i[i.length-1]));return this.currentFunction.flow=n.free(),r.inherit(n),a},t.prototype.compileBreakStatement=function(e){var t=this.module;if(e.label)return this.error(c.DiagnosticCode.Operation_not_supported,e.label.range),t.createUnreachable();var r=this.currentFunction.flow,n=r.breakLabel;return null==n?(this.error(c.DiagnosticCode.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement,e.range),t.createUnreachable()):(r.set(8),t.createBreak(n))},t.prototype.compileContinueStatement=function(e){var t=this.module,r=e.label;if(r)return this.error(c.DiagnosticCode.Operation_not_supported,r.range),t.createUnreachable();var n=this.currentFunction.flow,i=n.continueLabel;return null==i?(this.error(c.DiagnosticCode.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement,e.range),t.createUnreachable()):(n.set(16),t.createBreak(i))},t.prototype.compileDoStatement=function(e){var t=this.currentFunction,r=this.module,n=t.enterBreakContext(),i=t.flow,a=i.fork();t.flow=a;var s="break|"+n;a.breakLabel=s;var o="continue|"+n;a.continueLabel=o;var c=this.compileStatement(e.statement),l=this.makeIsTrueish(this.compileExpression(e.condition,_.Type.i32,0,0),this.currentType);t.flow=a.free(),t.leaveBreakContext();var p=a.isAny(29);a.unset(792),i.inherit(a);var u=[r.createLoop(o,p?c:r.createBlock(null,[c,r.createBreak(o,l)],0))];return p&&u.push(r.createUnreachable()),r.createBlock(s,u)},t.prototype.compileEmptyStatement=function(e){return this.module.createNop()},t.prototype.compileExpressionStatement=function(e){var t=this.compileExpression(e.expression,_.Type.void,0,0);return this.currentType!=_.Type.void&&(t=this.module.createDrop(t),this.currentType=_.Type.void),t},t.prototype.compileForStatement=function(e){var t=this.currentFunction,r=t.enterBreakContext(),n=t.flow,i=n.fork();t.flow=i;var a=i.breakLabel="break|"+r;i.breakLabel=a;var s="continue|"+r;i.continueLabel=s;var o="repeat|"+r,c=this.module,p=e.initializer?this.compileStatement(e.initializer):0,u=0,h=!1;if(e.condition){u=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType);var m=c.precomputeExpression(u);l.getExpressionId(m)==l.ExpressionId.Const&&(assert(1==l.getExpressionType(m)),0!=l.getConstValueI32(m)&&(h=!0)),u=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType)}else u=c.createI32(1),h=!0;var g=e.incrementor?this.compileExpression(e.incrementor,_.Type.void,1,0):0,y=e.statement,E=y.kind==d.NodeKind.BLOCK&&1==y.statements.length?this.compileStatement(y.statements[0]):this.compileStatement(y);t.flow=i.free(),t.leaveBreakContext();var f=i.isAny(528);i.unset(792),h?n.inherit(i):n.inheritConditional(i);var T=new Array;p&&T.push(p);var I=new Array;return f?I.push(c.createBlock(s,[c.createBreak(a,c.createUnary(l.UnaryOp.EqzI32,u)),E],0)):(I.push(c.createBreak(a,c.createUnary(l.UnaryOp.EqzI32,u))),I.push(E)),g&&I.push(g),I.push(c.createBreak(o)),T.push(c.createLoop(o,c.createBlock(null,I,0))),c.createBlock(a,T)},t.prototype.compileIfStatement=function(e){var t=this.module,r=this.currentFunction,n=e.ifTrue,i=e.ifFalse,a=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType);if(!this.options.noTreeShaking||this.currentFunction.isAny(p.CommonFlags.GENERIC|p.CommonFlags.GENERIC_CONTEXT)){var s=t.precomputeExpression(a);if(l.getExpressionId(s)==l.ExpressionId.Const&&1==l.getExpressionType(s))return l.getConstValueI32(s)?this.compileStatement(n):i?this.compileStatement(i):t.createNop();a=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType)}var o=r.flow,c=o.fork();r.flow=c;var u=this.compileStatement(n);r.flow=c.free();var h=0;if(i){var d=o.fork();r.flow=d,h=this.compileStatement(i),r.flow=d.free(),o.inheritMutual(c,d)}else o.inheritConditional(c);return t.createIf(a,u,h)},t.prototype.compileReturnStatement=function(e){var t=this.module,r=this.currentFunction,n=0,i=r.flow;if(i.set(1),e.value){var a=i.returnType;if(a==_.Type.void)return this.compileExpressionRetainType(e.value,a,0),this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,e.value.range,this.currentType.toString(),a.toString()),this.currentType=_.Type.void,t.createUnreachable();n=this.compileExpression(e.value,a,1,r.is(p.CommonFlags.MODULE_EXPORT)?1:0),i.canOverflow(n,a)||i.set(2)}return d.isLastStatement(e)?n||t.createNop():i.is(2048)?t.createBreak(assert(i.returnLabel),0,n):t.createReturn(n)},t.prototype.compileSwitchStatement=function(e){var t=this.module,r=this.currentFunction,n=e.cases,i=n.length;if(!i)return this.compileExpression(e.condition,_.Type.void,1,0);var a=r.enterBreakContext(),s=r.flow,o=r.getTempLocal(_.Type.u32,!1),c=o.index,p=new Array(1+i);p[0]=t.createSetLocal(c,this.compileExpression(e.condition,_.Type.u32,1,0));for(var u=1,h=-1,d=0;d<i;++d){var m=n[d].label;m?p[u++]=t.createBreak("case"+d.toString(10)+"|"+a,t.createBinary(l.BinaryOp.EqI32,t.createGetLocal(c,1),this.compileExpression(m,_.Type.u32,1,0))):h=d}r.freeTempLocal(o),p[u]=t.createBreak((h>=0?"case"+h.toString(10):"break")+"|"+a);var g=t.createBlock("case0|"+a,p,0),y=!0,E=!0,f=!0,T=!0;for(d=0;d<i;++d){var I=n[d].statements,v=I.length,A=s.fork();r.flow=A;var C="break|"+a;A.breakLabel=C;var N=d==i-1,O=N?C:"case"+(d+1).toString(10)+"|"+a,S=new Array(1+v);S[0]=g;for(var L=1,b=!1,k=0;k<v;++k){var R=this.compileStatement(I[k]);if(l.getExpressionId(R)!=l.ExpressionId.Nop&&(S[L++]=R,A.isAny(29))){b=!0;break}}S.length=L,(b||N)&&(A.is(1)||(y=!1),A.is(2)||(E=!1),A.is(4)||(f=!1),A.is(32)||(T=!1)),A.unset(264),r.flow=A.free(),g=t.createBlock(O,S,0)}return r.leaveBreakContext(),h>=0&&(y&&s.set(1),E&&s.set(2),f&&s.set(4),T&&s.set(32)),g},t.prototype.compileThrowStatement=function(e){var t=this.currentFunction.flow;return t.set(4),t.set(1),o.compileAbort(this,null,e)},t.prototype.compileTryStatement=function(e){return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()},t.prototype.compileVariableStatement=function(e,t){void 0===t&&(t=!1);var r=this.program,n=this.currentFunction,i=e.declarations,a=i.length;if(t||n==this.startFunctionInstance&&e.parent&&e.parent.kind==d.NodeKind.SOURCE){for(var s=0;s<a;++s)this.compileGlobalDeclaration(i[s]);return 0}var o=new Array,h=this.currentFunction.flow,m=this.resolver;for(s=0;s<a;++s){var g=i[s],y=g.name.text,E=null,f=0;if(g.type){if(!(E=m.resolveType(g.type,h.contextualTypeArguments)))continue;g.initializer&&(f=this.compileExpression(g.initializer,E,1,0))}else{if(!g.initializer){this.error(c.DiagnosticCode.Type_expected,g.name.range.atEnd);continue}if(f=this.compileExpressionRetainType(g.initializer,_.Type.void,0),this.currentType==_.Type.void){this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,g.range,this.currentType.toString(),"<auto>");continue}E=this.currentType}var T=!1;if(g.is(p.CommonFlags.CONST))if(f)if(f=this.module.precomputeExpression(f),l.getExpressionId(f)==l.ExpressionId.Const){var I=new u.Local(r,y,-1,E);switch(l.getExpressionType(f)){case 1:I=I.withConstantIntegerValue(i64_new(l.getConstValueI32(f),0));break;case 2:I=I.withConstantIntegerValue(i64_new(l.getConstValueI64Low(f),l.getConstValueI64High(f)));break;case 3:I=I.withConstantFloatValue(l.getConstValueF32(f));break;case 4:I=I.withConstantFloatValue(l.getConstValueF64(f));break;default:return assert(!1),this.module.createUnreachable()}var v=n.flow.scopedLocals;if(v){if(v.has(y))return this.error(c.DiagnosticCode.Duplicate_identifier_0,g.name.range,y),this.module.createUnreachable()}else n.flow.scopedLocals=v=new Map;v.set(y,I),T=!0}else this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,g.range);else this.error(c.DiagnosticCode._const_declarations_must_be_initialized,g.range);if(!T){I=void 0;I=g.isAny(p.CommonFlags.LET|p.CommonFlags.CONST)||h.is(2048)?h.addScopedLocal(E,y,!1,g):n.addLocal(E,y,g),f?(o.push(this.compileAssignmentWithValue(g.name,f)),I.type.is(36)&&h.setLocalWrapped(I.index,!h.canOverflow(f,E))):I.type.is(36)&&h.setLocalWrapped(I.index,!0)}}return o.length?1==o.length?o[0]:this.module.createBlock(null,o,0):0},t.prototype.compileVoidStatement=function(e){return this.compileExpression(e.expression,_.Type.void,2,0)},t.prototype.compileWhileStatement=function(e){var t=this.module,r=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType);if(!this.options.noTreeShaking||this.currentFunction.isAny(p.CommonFlags.GENERIC|p.CommonFlags.GENERIC_CONTEXT)){var n=t.precomputeExpression(r);if(l.getExpressionId(n)==l.ExpressionId.Const&&1==l.getExpressionType(n)){if(!l.getConstValueI32(n))return t.createNop()}else r=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType)}var i=this.currentFunction,a=i.enterBreakContext(),s=i.flow,o=s.fork();i.flow=o;var c="break|"+a;o.breakLabel=c;var u="continue|"+a;o.continueLabel=u;var h=this.compileStatement(e.statement),d=o.isAny(29);return i.flow=o.free(),i.leaveBreakContext(),o.unset(792),s.inheritConditional(o),t.createBlock(c,[t.createLoop(u,t.createIf(r,d?h:t.createBlock(null,[h,t.createBreak(u)],0)))])},t.prototype.compileInlineConstant=function(e,t,r){assert(e.is(p.CommonFlags.INLINED));var n=e.type;switch(!r&&n.is(4)&&t.is(4)&&n.size<t.size?(this.currentType=t).kind:(this.currentType=n).kind){case 0:case 1:var i=n.computeSmallIntegerShift(_.Type.i32);return this.module.createI32(1==e.constantValueKind?i64_low(e.constantIntegerValue)<<i>>i:0);case 5:case 6:case 10:var a=e.type.computeSmallIntegerMask(_.Type.i32);return this.module.createI32(1==e.constantValueKind?i64_low(e.constantIntegerValue)&a:0);case 2:case 7:return this.module.createI32(1==e.constantValueKind?i64_low(e.constantIntegerValue):0);case 4:case 9:if(!e.program.options.isWasm64)return this.module.createI32(1==e.constantValueKind?i64_low(e.constantIntegerValue):0);case 3:case 8:return 1==e.constantValueKind?this.module.createI64(i64_low(e.constantIntegerValue),i64_high(e.constantIntegerValue)):this.module.createI64(0);case 12:if(!e.hasDecorator(u.DecoratorFlags.BUILTIN)||t!=_.Type.f32)return this.module.createF64(e.constantFloatValue);this.currentType=_.Type.f32;case 11:return this.module.createF32(e.constantFloatValue);default:return assert(!1),this.module.createUnreachable()}},t.prototype.compileExpression=function(e,t,r,n){var i;switch(this.currentType=t,e.kind){case d.NodeKind.ASSERTION:i=this.compileAssertionExpression(e,t);break;case d.NodeKind.BINARY:i=this.compileBinaryExpression(e,t);break;case d.NodeKind.CALL:i=this.compileCallExpression(e,t);break;case d.NodeKind.COMMA:i=this.compileCommaExpression(e,t);break;case d.NodeKind.ELEMENTACCESS:i=this.compileElementAccessExpression(e,t);break;case d.NodeKind.FUNCTION:i=this.compileFunctionExpression(e,t);break;case d.NodeKind.IDENTIFIER:case d.NodeKind.FALSE:case d.NodeKind.NULL:case d.NodeKind.THIS:case d.NodeKind.SUPER:case d.NodeKind.TRUE:i=this.compileIdentifierExpression(e,t,0==r);break;case d.NodeKind.INSTANCEOF:i=this.compileInstanceOfExpression(e,t);break;case d.NodeKind.LITERAL:i=this.compileLiteralExpression(e,t);break;case d.NodeKind.NEW:i=this.compileNewExpression(e,t);break;case d.NodeKind.PARENTHESIZED:i=this.compileParenthesizedExpression(e,t);break;case d.NodeKind.PROPERTYACCESS:i=this.compilePropertyAccessExpression(e,t,0==r);break;case d.NodeKind.TERNARY:i=this.compileTernaryExpression(e,t);break;case d.NodeKind.UNARYPOSTFIX:i=this.compileUnaryPostfixExpression(e,t);break;case d.NodeKind.UNARYPREFIX:i=this.compileUnaryPrefixExpression(e,t);break;default:this.error(c.DiagnosticCode.Operation_not_supported,e.range),i=this.module.createUnreachable()}var a=this.currentType;return 0!=r&&a!=t?(i=this.convertExpression(i,a,t,r,n,e),this.currentType=t):1==n&&(i=this.ensureSmallIntegerWrap(i,a)),this.options.sourceMap&&this.addDebugLocation(i,e.range),i},t.prototype.compileExpressionRetainType=function(e,t,r){return this.compileExpression(e,t==_.Type.void?_.Type.i32:t,0,r)},t.prototype.precomputeExpression=function(e,t,r,n){return this.module.precomputeExpression(this.compileExpression(e,t,r,n))},t.prototype.convertExpression=function(e,t,r,n,i,a){assert(0!=n);var s=this.module;return 13==t.kind?(assert(13!=r.kind),this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,a.range,t.toString(),r.toString()),s.createUnreachable()):13==r.kind?s.createDrop(e):(t.isAssignableTo(r)||1==n&&this.error(c.DiagnosticCode.Conversion_from_type_0_to_1_requires_an_explicit_cast,a.range,t.toString(),r.toString()),t.is(8)?r.is(8)?11==t.kind?12==r.kind&&(e=s.createUnary(l.UnaryOp.PromoteF32,e)):11==r.kind&&(e=s.createUnary(l.UnaryOp.DemoteF64,e)):r.is(4)?e=11==t.kind?r.is(1)?r.is(64)?s.createUnary(l.UnaryOp.TruncF32ToI64,e):s.createUnary(l.UnaryOp.TruncF32ToI32,e):r.is(64)?s.createUnary(l.UnaryOp.TruncF32ToU64,e):s.createUnary(l.UnaryOp.TruncF32ToU32,e):r.is(1)?r.is(64)?s.createUnary(l.UnaryOp.TruncF64ToI64,e):s.createUnary(l.UnaryOp.TruncF64ToI32,e):r.is(64)?s.createUnary(l.UnaryOp.TruncF64ToU64,e):s.createUnary(l.UnaryOp.TruncF64ToU32,e):(assert(0==r.flags,"void type expected"),e=s.createDrop(e)):t.is(4)&&r.is(8)?e=11==r.kind?t.is(64)?s.createUnary(t.is(1)?l.UnaryOp.ConvertI64ToF32:l.UnaryOp.ConvertU64ToF32,e):s.createUnary(t.is(1)?l.UnaryOp.ConvertI32ToF32:l.UnaryOp.ConvertU32ToF32,e):t.is(64)?s.createUnary(t.is(1)?l.UnaryOp.ConvertI64ToF64:l.UnaryOp.ConvertU64ToF64,e):s.createUnary(t.is(1)?l.UnaryOp.ConvertI32ToF64:l.UnaryOp.ConvertU32ToF64,e):t.is(64)?r.is(64)||(e=s.createUnary(l.UnaryOp.WrapI64,e)):r.is(64)?(e=s.createUnary(t.is(1)?l.UnaryOp.ExtendI32:l.UnaryOp.ExtendU32,this.ensureSmallIntegerWrap(e,t)),i=0):t.is(32)&&t.size<r.size&&(e=this.ensureSmallIntegerWrap(e,t),i=0),this.currentType=r,1==i?this.ensureSmallIntegerWrap(e,r):e)},t.prototype.compileAssertionExpression=function(e,t){var r=this.resolver.resolveType(e.toType,this.currentFunction.flow.contextualTypeArguments);return r?this.compileExpression(e.expression,r,2,0):this.module.createUnreachable()},t.prototype.compileBinaryExpression=function(e,t){var r,n,i,a,s,o,p=this.module,d=e.left,m=e.right,g=!1,y=e.operator;switch(y){case h.Token.LESSTHAN:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.LT)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"<",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.LtI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.LtI64,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.LtI64:l.BinaryOp.LtI32,r,i);break;case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.LtU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.LtU64:l.BinaryOp.LtU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.LtU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.LtF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.LtF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.GREATERTHAN:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.GT)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,">",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.GtI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.GtI64:l.BinaryOp.GtI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.GtI64,r,i);break;case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.GtU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.GtU64:l.BinaryOp.GtU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.GtU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.GtF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.GtF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.LESSTHAN_EQUALS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.LE)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"<=",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.LeI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.LeI64:l.BinaryOp.LeI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.LeI64,r,i);break;case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.LeU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.LeU64:l.BinaryOp.LeU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.LeU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.LeF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.LeF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.GREATERTHAN_EQUALS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.GE)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,">=",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.GeI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.GeI64:l.BinaryOp.GeI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.GeI64,r,i);break;case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.GeU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.GeU64:l.BinaryOp.GeU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.GeU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.GeF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.GeF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.EQUALS_EQUALS_EQUALS:case h.Token.EQUALS_EQUALS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,y==h.Token.EQUALS_EQUALS&&this.currentType.is(256))if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.EQ)){o=this.compileBinaryOverload(v,d,r,m,e);break}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,h.operatorTokenToString(e.operator),n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.EqI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.EqI64:l.BinaryOp.EqI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.EqI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.EqF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.EqF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.EXCLAMATION_EQUALS_EQUALS:case h.Token.EXCLAMATION_EQUALS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,y==h.Token.EXCLAMATION_EQUALS&&this.currentType.is(256))if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.NE)){o=this.compileBinaryOverload(v,d,r,m,e);break}if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,h.operatorTokenToString(e.operator),n.toString(),a.toString()),this.currentType=t,p.createUnreachable();switch(r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m),s.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:o=p.createBinary(l.BinaryOp.NeI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.NeI64:l.BinaryOp.NeI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.NeI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.NeF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.NeF64,r,i);break;default:assert(!1),o=p.createUnreachable()}this.currentType=_.Type.bool;break;case h.Token.EQUALS:return this.compileAssignment(d,m,t);case h.Token.PLUS_EQUALS:g=!0;case h.Token.PLUS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.ADD)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0);else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"+",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:case 2:case 7:o=p.createBinary(l.BinaryOp.AddI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.AddI64:l.BinaryOp.AddI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.AddI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.AddF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.AddF64,r,i);break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.MINUS_EQUALS:g=!0;case h.Token.MINUS:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.SUB)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"-",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:case 2:case 7:o=p.createBinary(l.BinaryOp.SubI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.SubI64:l.BinaryOp.SubI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.SubI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.SubF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.SubF64,r,i);break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.ASTERISK_EQUALS:g=!0;case h.Token.ASTERISK:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.MUL)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,1);else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"*",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:case 2:case 7:o=p.createBinary(l.BinaryOp.MulI32,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.MulI64:l.BinaryOp.MulI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.MulI64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.MulF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.MulF64,r,i);break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.ASTERISK_ASTERISK_EQUALS:g=!0;case h.Token.ASTERISK_ASTERISK:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.POW)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}var E=void 0;if(11==this.currentType.kind){if(i=this.compileExpression(m,_.Type.f32,1,0),a=this.currentType,!(E=this.f32PowInstance)){if(!(f=this.program.elementsLookup.get("Mathf"))){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Mathf"),o=p.createUnreachable();break}if(!(T=f.members?f.members.get("pow"):null)){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Mathf.pow"),o=p.createUnreachable();break}assert(T.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.f32PowInstance=E=this.resolver.resolveFunction(T,null)}}else if(r=this.convertExpression(r,this.currentType,_.Type.f64,1,0,d),n=this.currentType,i=this.compileExpression(m,_.Type.f64,1,0),a=this.currentType,!(E=this.f64PowInstance)){if(!(f=this.program.elementsLookup.get("Math"))){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Math"),o=p.createUnreachable();break}if(!(T=f.members?f.members.get("pow"):null)){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Math.pow"),o=p.createUnreachable();break}assert(T.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.f64PowInstance=E=this.resolver.resolveFunction(T,null)}o=E&&this.compileFunction(E)?this.makeCallDirect(E,[r,i]):p.createUnreachable();break;case h.Token.SLASH_EQUALS:g=!0;case h.Token.SLASH:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.DIV)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,1),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"/",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m)}switch(this.currentType.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.DivI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.DivI64:l.BinaryOp.DivI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.DivI64,r,i);break;case 5:case 6:case 10:case 7:o=p.createBinary(l.BinaryOp.DivU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.DivU64:l.BinaryOp.DivU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.DivU64,r,i);break;case 11:o=p.createBinary(l.BinaryOp.DivF32,r,i);break;case 12:o=p.createBinary(l.BinaryOp.DivF64,r,i);break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.PERCENT_EQUALS:g=!0;case h.Token.PERCENT:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.REM)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,1),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"%",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,1,d),i=this.convertExpression(i,a,a=s,1,1,m)}switch(this.currentType.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.RemI32,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.RemI64:l.BinaryOp.RemI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.RemI64,r,i);break;case 5:case 6:case 10:case 7:o=p.createBinary(l.BinaryOp.RemU32,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.RemU64:l.BinaryOp.RemU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.RemU64,r,i);break;case 11:if(!(E=this.f32ModInstance)){if(!(f=this.program.elementsLookup.get("Mathf"))){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Mathf"),o=p.createUnreachable();break}if(!(T=f.members?f.members.get("mod"):null)){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Mathf.mod"),o=p.createUnreachable();break}assert(T.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.f32ModInstance=E=this.resolver.resolveFunction(T,null)}o=E&&this.compileFunction(E)?this.makeCallDirect(E,[r,i]):p.createUnreachable();break;case 12:if(!(E=this.f64ModInstance)){var f,T;if(!(f=this.program.elementsLookup.get("Math"))){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Math"),o=p.createUnreachable();break}if(!(T=f.members?f.members.get("mod"):null)){this.error(c.DiagnosticCode.Cannot_find_name_0,e.range,"Math.mod"),o=p.createUnreachable();break}assert(T.kind==u.ElementKind.FUNCTION_PROTOTYPE),this.f64ModInstance=E=this.resolver.resolveFunction(T,null)}o=E&&this.compileFunction(E)?this.makeCallDirect(E,[r,i]):p.createUnreachable();break;default:assert(!1),o=p.createUnreachable()}break;case h.Token.LESSTHAN_LESSTHAN_EQUALS:g=!0;case h.Token.LESSTHAN_LESSTHAN:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_SHL)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}switch(i=this.compileExpression(m,n,1,0),a=this.currentType,this.currentType.kind){case 0:case 1:case 5:case 6:case 10:case 2:case 7:o=p.createBinary(l.BinaryOp.ShlI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.ShlI64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.ShlI64:l.BinaryOp.ShlI32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.GREATERTHAN_GREATERTHAN_EQUALS:g=!0;case h.Token.GREATERTHAN_GREATERTHAN:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_SHR)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}switch(r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,1),a=this.currentType,this.currentType.kind){case 0:case 1:case 2:o=p.createBinary(l.BinaryOp.ShrI32,r,i);break;case 3:o=p.createBinary(l.BinaryOp.ShrI64,r,i);break;case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.ShrI64:l.BinaryOp.ShrI32,r,i);break;case 5:case 6:case 10:case 7:o=p.createBinary(l.BinaryOp.ShrU32,r,i);break;case 8:o=p.createBinary(l.BinaryOp.ShrU64,r,i);break;case 9:o=p.createBinary(this.options.isWasm64?l.BinaryOp.ShrU64:l.BinaryOp.ShrU32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:g=!0;case h.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_SHR_U)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}switch(r=this.ensureSmallIntegerWrap(r,n),i=this.compileExpression(m,n,1,0),a=this.currentType,this.currentType.kind){case 5:case 6:case 10:o=p.createBinary(l.BinaryOp.ShrU32,r,i);case 0:case 1:case 2:case 7:o=p.createBinary(l.BinaryOp.ShrU32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.ShrU64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.ShrU64:l.BinaryOp.ShrU32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.AMPERSAND_EQUALS:g=!0;case h.Token.AMPERSAND:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_AND)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"&",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 2:case 5:case 6:case 10:case 7:o=p.createBinary(l.BinaryOp.AndI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.AndI64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.AndI64:l.BinaryOp.AndI32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.BAR_EQUALS:g=!0;case h.Token.BAR:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_OR)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"|",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:o=p.createBinary(l.BinaryOp.OrI32,r,i);break;case 2:case 7:o=p.createBinary(l.BinaryOp.OrI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.OrI64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.OrI64:l.BinaryOp.OrI32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.CARET_EQUALS:g=!0;case h.Token.CARET:if(r=this.compileExpressionRetainType(d,t.intType,0),n=this.currentType,this.currentType.is(256)){var I,v;if(I=n.classReference)if(v=I.lookupOverload(u.OperatorKind.BITWISE_XOR)){o=this.compileBinaryOverload(v,d,r,m,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}if(g)i=this.compileExpression(m,n,1,0),a=this.currentType;else{if(i=this.compileExpressionRetainType(m,n,0),a=this.currentType,!(s=_.Type.commonCompatible(n,a,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"^",n.toString(),a.toString()),this.currentType=t,p.createUnreachable();r=this.convertExpression(r,n,n=s,1,0,d),i=this.convertExpression(i,a,a=s,1,0,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:o=p.createBinary(l.BinaryOp.XorI32,r,i);break;case 2:case 7:o=p.createBinary(l.BinaryOp.XorI32,r,i);break;case 3:case 8:o=p.createBinary(l.BinaryOp.XorI64,r,i);break;case 9:case 4:o=p.createBinary(this.options.isWasm64?l.BinaryOp.XorI64:l.BinaryOp.XorI32,r,i);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,h.operatorTokenToString(e.operator),this.currentType.toString()),p.createUnreachable();default:assert(!1),o=p.createUnreachable()}break;case h.Token.AMPERSAND_AMPERSAND:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,i=this.compileExpression(m,n,1,0),a=this.currentType,o=p.cloneExpression(r,!0,0))this.makeIsTrueish(r,this.currentType),o=p.createIf(this.makeIsTrueish(r,this.currentType),i,o);else{var A=this.currentFunction.flow,C=this.currentFunction.getAndFreeTempLocal(this.currentType,!A.canOverflow(r,this.currentType));o=p.createIf(this.makeIsTrueish(p.createTeeLocal(C.index,r),this.currentType),i,p.createGetLocal(assert(C).index,this.currentType.toNativeType()))}break;case h.Token.BAR_BAR:if(r=this.compileExpressionRetainType(d,t,0),n=this.currentType,i=this.compileExpression(m,n,1,0),a=this.currentType,o=this.module.cloneExpression(r,!0,0))o=this.module.createIf(this.makeIsTrueish(r,this.currentType),o,i);else{A=this.currentFunction.flow,C=this.currentFunction.getAndFreeTempLocal(this.currentType,!A.canOverflow(r,this.currentType));o=p.createIf(this.makeIsTrueish(p.createTeeLocal(C.index,r),this.currentType),p.createGetLocal(assert(C).index,this.currentType.toNativeType()),i)}break;default:assert(!1),o=this.module.createUnreachable()}return g?this.compileAssignmentWithValue(d,o,t!=_.Type.void):o},t.prototype.compileUnaryOverload=function(e,t,r,n){var i,a=0;return e.is(p.CommonFlags.INSTANCE)?(a=r,i=[]):i=[t],this.compileCallDirect(e,i,n,a,e.hasDecorator(u.DecoratorFlags.INLINE))},t.prototype.compileBinaryOverload=function(e,t,r,n,i){var a,s=0;if(e.is(p.CommonFlags.INSTANCE)){var o=assert(e.parent);assert(o.kind==u.ElementKind.CLASS),s=r,a=[n]}else a=[t,n];return this.compileCallDirect(e,a,i,s,e.hasDecorator(u.DecoratorFlags.INLINE))},t.prototype.compileAssignment=function(e,t,r){var n,i=this.program.resolver,a=this.currentFunction,s=i.resolveExpression(e,a);if(!s)return this.module.createUnreachable();switch(s.kind){case u.ElementKind.GLOBAL:if(!this.compileGlobal(s))return this.module.createUnreachable();assert(s.type!=_.Type.void);case u.ElementKind.LOCAL:case u.ElementKind.FIELD:n=s.type;break;case u.ElementKind.PROPERTY:var o=s.setterPrototype;if(o){var l=this.resolver.resolveFunction(o,null);if(!l)return this.module.createUnreachable();assert(1==l.signature.parameterTypes.length),n=l.signature.parameterTypes[0];break}return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,s.internalName),this.module.createUnreachable();case u.ElementKind.CLASS:if(i.currentElementExpression){var p=a.flow.is(4096),h=s.lookupOverload(u.OperatorKind.INDEXED_SET,p);if(!h)return s.lookupOverload(u.OperatorKind.INDEXED_GET,p)?this.error(c.DiagnosticCode.Index_signature_in_type_0_only_permits_reading,e.range,s.internalName):this.error(c.DiagnosticCode.Index_signature_is_missing_in_type_0,e.range,s.internalName),this.module.createUnreachable();assert(2==h.signature.parameterTypes.length),n=h.signature.parameterTypes[1];break}default:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}assert(n!=_.Type.void);var d=this.compileExpression(t,n,1,0);return this.compileAssignmentWithValue(e,d,r!=_.Type.void)},t.prototype.compileAssignmentWithValue=function(e,t,r){void 0===r&&(r=!1);var n=this.module,i=this.resolver.resolveExpression(e,this.currentFunction);if(!i)return n.createUnreachable();switch(i.kind){case u.ElementKind.LOCAL:var a=i.type;if(assert(a!=_.Type.void),this.currentType=r?a:_.Type.void,i.is(p.CommonFlags.CONST))return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,i.internalName),n.createUnreachable();var s=this.currentFunction.flow;return a.is(36)&&s.setLocalWrapped(i.index,!s.canOverflow(t,a)),r?n.createTeeLocal(i.index,t):n.createSetLocal(i.index,t);case u.ElementKind.GLOBAL:if(!this.compileGlobal(i))return n.createUnreachable();a=i.type;if(assert(a!=_.Type.void),this.currentType=r?a:_.Type.void,i.is(p.CommonFlags.CONST))return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,i.internalName),n.createUnreachable();if(t=this.ensureSmallIntegerWrap(t,a),r){var o=a.toNativeType(),l=i.internalName;return n.createBlock(null,[n.createSetGlobal(l,t),n.createGetGlobal(l,o)],o)}return n.createSetGlobal(i.internalName,t);case u.ElementKind.FIELD:var h=i.declaration;if(i.is(p.CommonFlags.READONLY)&&!this.currentFunction.is(p.CommonFlags.CONSTRUCTOR)&&null!=h&&null==h.initializer)return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,i.internalName),n.createUnreachable();var d=assert(this.resolver.currentThisExpression),m=this.compileExpressionRetainType(d,this.options.usizeType,0);a=i.type;this.currentType=r?a:_.Type.void;o=a.toNativeType();if(10==a.kind&&(t=this.ensureSmallIntegerWrap(t,a)),r){s=(L=this.currentFunction).flow;var g=L.getAndFreeTempLocal(a,!s.canOverflow(t,a)).index;return n.createBlock(null,[n.createSetLocal(g,t),n.createStore(a.byteSize,m,n.createGetLocal(g,o),o,i.memoryOffset),n.createGetLocal(g,o)],o)}return n.createStore(a.byteSize,m,t,o,i.memoryOffset);case u.ElementKind.PROPERTY:var y=i.setterPrototype;if(y){var E=this.resolver.resolveFunction(y,null);if(!E)return n.createUnreachable();if(!r){if(E.is(p.CommonFlags.INSTANCE)){d=assert(this.resolver.currentThisExpression),m=this.compileExpressionRetainType(d,this.options.usizeType,0);return this.makeCallDirect(E,[m,t])}return this.makeCallDirect(E,[t])}var f=i.getterPrototype;assert(null!=f);var T=this.resolver.resolveFunction(f,null);if(!T)return n.createUnreachable();var I=(R=T.signature.returnType).toNativeType();if(E.is(p.CommonFlags.INSTANCE)){d=assert(this.resolver.currentThisExpression),m=this.compileExpressionRetainType(d,this.options.usizeType,0),g=this.currentFunction.getAndFreeTempLocal(R,!1).index;return n.createBlock(null,[this.makeCallDirect(E,[n.createTeeLocal(g,m),t]),this.makeCallDirect(T,[n.createGetLocal(g,I)])],I)}return n.createBlock(null,[this.makeCallDirect(E,[t]),this.makeCallDirect(T)],I)}return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,i.internalName),n.createUnreachable();case u.ElementKind.CLASS:var v=this.resolver.currentElementExpression;if(v){var A=this.currentFunction.flow.is(4096),C=i.lookupOverload(u.OperatorKind.INDEXED_GET,A);if(!C)return this.error(c.DiagnosticCode.Index_signature_is_missing_in_type_0,e.range,i.internalName),n.createUnreachable();var N=i.lookupOverload(u.OperatorKind.INDEXED_SET,A);if(!N)return this.error(c.DiagnosticCode.Index_signature_in_type_0_only_permits_reading,e.range,i.internalName),this.currentType=r?C.signature.returnType:_.Type.void,n.createUnreachable();var O=i.type,S=(d=assert(this.resolver.currentThisExpression),m=this.compileExpressionRetainType(d,this.options.usizeType,0),this.compileExpression(v,_.Type.i32,1,0));if(r){var L,b=(L=this.currentFunction).getTempLocal(O,!1),k=L.getAndFreeTempLocal(this.currentType,!1),R=C.signature.returnType;return this.currentFunction.freeTempLocal(b),n.createBlock(null,[this.makeCallDirect(N,[n.createTeeLocal(b.index,m),n.createTeeLocal(k.index,S),t]),this.makeCallDirect(C,[n.createGetLocal(b.index,b.type.toNativeType()),n.createGetLocal(k.index,k.type.toNativeType())])],R.toNativeType())}return this.makeCallDirect(N,[m,S,t])}}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()},t.prototype.compileCallExpression=function(e,t){var r,n,i=this.module,a=this.currentFunction,s=this.resolver.resolveExpression(e.expression,a);if(!s)return i.createUnreachable();switch(s.kind){case u.ElementKind.FUNCTION_PROTOTYPE:var o=s,l=e.typeArguments;if(o.hasDecorator(u.DecoratorFlags.BUILTIN))return this.compileCallExpressionBuiltin(o,e,t);var h=null;if(l){if(!o.is(p.CommonFlags.GENERIC))return this.error(c.DiagnosticCode.Type_0_is_not_generic,e.expression.range,o.internalName),i.createUnreachable();h=this.resolver.resolveFunctionInclTypeArguments(o,l,this.currentFunction.flow.contextualTypeArguments,e)}else{if(o.is(p.CommonFlags.GENERIC)){for(var m=new Map,g=assert(o.declaration.typeParameters),y=g.length,E=0;E<y;++E)m.set(g[E].name.text,null);var f=o.declaration.signature.parameters,T=f.length,I=e.arguments,v=I.length,A=new Array(v);for(E=0;E<T;++E){var C=f[E].type,N=C.kind==d.NodeKind.TYPE?C.name.text:null,O=E<v?I[E]:o.declaration.signature.parameters[E].initializer;if(!O)return this.error(c.DiagnosticCode.Expected_0_arguments_but_got_1,e.range,T.toString(10),v.toString(10)),i.createUnreachable();if(null!==N&&m.has(N)){if(k=m.get(N)){A[E]=this.compileExpressionRetainType(O,k,0);var S=void 0;if(!(S=_.Type.commonCompatible(k,this.currentType,!0))&&!(S=_.Type.commonCompatible(k,this.currentType,!1)))return this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,f[E].type.range,this.currentType.toString(),k.toString()),i.createUnreachable();k=S}else A[E]=this.compileExpressionRetainType(O,_.Type.i32,0),k=this.currentType;m.set(N,k)}else{var L=this.resolver.resolveType(f[E].type,this.currentFunction.flow.contextualTypeArguments);if(!L)return i.createUnreachable();A[E]=this.compileExpression(O,L,1,0)}}var b=new Array(y);for(E=0;E<y;++E){var k=assert(m.get(g[E].name.text));b[E]=k}return(h=this.resolver.resolveFunction(o,b,this.currentFunction.flow.contextualTypeArguments))?this.makeCallDirect(h,A):this.module.createUnreachable()}h=this.resolver.resolveFunction(o,null,this.currentFunction.flow.contextualTypeArguments)}if(!h)return this.module.createUnreachable();var R=0;return h.is(p.CommonFlags.INSTANCE)&&(R=this.compileExpressionRetainType(assert(this.resolver.currentThisExpression),this.options.usizeType,0)),this.compileCallDirect(h,e.arguments,e,R,h.hasDecorator(u.DecoratorFlags.INLINE));case u.ElementKind.LOCAL:if(r=s.type.signatureReference){n=s.is(p.CommonFlags.INLINED)?i.createI32(i64_low(s.constantIntegerValue)):i.createGetLocal(s.index,1);break}return this.error(c.DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,e.range,s.type.toString()),i.createUnreachable();case u.ElementKind.GLOBAL:if(r=s.type.signatureReference){n=i.createGetGlobal(s.internalName,s.type.toNativeType());break}return this.error(c.DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,e.range,s.type.toString()),i.createUnreachable();case u.ElementKind.FIELD:if(r=(F=s.type).signatureReference){var x=assert(this.resolver.currentThisExpression);R=this.compileExpressionRetainType(x,this.options.usizeType,0);n=i.createLoad(4,!1,R,1,s.memoryOffset);break}return this.error(c.DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,e.range,F.toString()),i.createUnreachable();case u.ElementKind.FUNCTION_TARGET:r=s.signature,n=this.compileExpression(e.expression,s.type,1,0);break;case u.ElementKind.PROPERTY:var F;if(n=this.compileGetter(s,e.expression),!(r=(F=this.currentType).signatureReference))return this.error(c.DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,e.range,F.toString()),i.createUnreachable();break;default:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable()}return this.compileCallIndirect(r,n,e.arguments,e)},t.prototype.compileCallExpressionBuiltin=function(e,t,r){var n=null,i=t.typeArguments;t.typeArguments&&(e.is(p.CommonFlags.GENERIC)||this.error(c.DiagnosticCode.Type_0_is_not_generic,t.range,e.internalName),n=this.resolver.resolveTypeArguments(assert(e.declaration.typeParameters),i,this.currentFunction.flow.contextualTypeArguments,t));var a=o.compileCall(this,e,n,t.arguments,r,t);return a||(this.error(c.DiagnosticCode.Operation_not_supported,t.range),this.module.createUnreachable())},t.prototype.checkCallSignature=function(e,t,r,n){if(r!=(null!=e.thisType))return this.error(c.DiagnosticCode.Operation_not_supported,n.range),!1;var i=e.hasRest;if(i)return this.error(c.DiagnosticCode.Operation_not_supported,n.range),!1;var a=e.requiredParameters,s=e.parameterTypes.length;return t<a?(this.error(a<s?c.DiagnosticCode.Expected_at_least_0_arguments_but_got_1:c.DiagnosticCode.Expected_0_arguments_but_got_1,n.range,a.toString(),t.toString()),!1):!(t>s&&!i)||(this.error(c.DiagnosticCode.Expected_0_arguments_but_got_1,n.range,s.toString(),t.toString()),!1)},t.prototype.compileCallDirect=function(e,t,r,n,i){void 0===n&&(n=0),void 0===i&&(i=!1);var a=t.length,s=e.signature;if(!this.checkCallSignature(s,a,0!=n,r))return this.module.createUnreachable();if(i){if(assert(!e.is(p.CommonFlags.TRAMPOLINE)),!this.currentInlineFunctions.includes(e)){this.currentInlineFunctions.push(e);var o=this.compileCallInlineUnchecked(e,t,r,n);return this.currentInlineFunctions.pop(),o}this.warning(c.DiagnosticCode.Function_0_cannot_be_inlined_into_itself,r.range,e.internalName)}var l=n?a+1:a,u=new Array(l),h=0;n&&(u[0]=n,h=1);for(var d=s.parameterTypes,_=0;_<a;++_,++h)u[h]=this.compileExpression(t[_],d[_],1,0);return assert(h==l),this.makeCallDirect(e,u)},t.prototype.compileCallInlineUnchecked=function(e,t,r,n){var a,s;void 0===n&&(n=0);var o=t.length,h=e.signature,m=this.currentFunction,g=this.module,y=e.prototype.declaration,E=m.flow,f=e.internalName+"|inlined."+(e.nextInlineId++).toString(10),T=e.signature.returnType,I=u.Flow.create(m);I.set(2048),I.returnLabel=f,I.returnType=T,I.contextualTypeArguments=e.contextualTypeArguments;var v=[];if(n){var A=assert(e.parent);if(assert(A.kind==u.ElementKind.CLASS),l.getExpressionId(n)==l.ExpressionId.GetLocal)I.addScopedLocalAlias(l.getGetLocalIndex(n),A.type,"this");else{var C=I.addScopedLocal(A.type,"this",!1);v.push(g.createSetLocal(C.index,n))}}for(var N=h.parameterTypes,O=0;O<o;++O){var S=this.compileExpression(t[O],N[O],1,0);if(l.getExpressionId(S)==l.ExpressionId.GetLocal)I.addScopedLocalAlias(l.getGetLocalIndex(S),N[O],h.getParameterName(O));else{var L=I.addScopedLocal(N[O],h.getParameterName(O),!I.canOverflow(S,N[O]));v.push(g.createSetLocal(L.index,S))}}m.flow=I;var b=h.parameterTypes.length;for(O=o;O<b;++O){var k=this.compileExpression(assert(y.signature.parameters[O].initializer),N[O],1,1);L=I.addScopedLocal(N[O],h.getParameterName(O),!I.canOverflow(k,N[O]));v.push(g.createSetLocal(L.index,k))}var R=assert(y.body);if(R.kind==d.NodeKind.BLOCK)for(var x=R.statements,F=(O=0,x.length);O<F;++O){var D=this.compileStatement(x[O]);if(l.getExpressionId(D)!=l.ExpressionId.Nop&&(v.push(D),I.isAny(29)))break}else v.push(this.compileStatement(R));var B=I.scopedLocals;if(B){try{for(var U=i(B.values()),P=U.next();!P.done;P=U.next()){var w=P.value;w.is(p.CommonFlags.SCOPED)&&m.freeTempLocal(w)}}catch(e){a={error:e}}finally{try{P&&!P.done&&(s=U.return)&&s.call(U)}finally{if(a)throw a.error}}I.scopedLocals=null}return I.finalize(),this.currentFunction.flow=E,this.currentType=T,T==_.Type.void||I.isAny(29)?g.createBlock(f,v,T.toNativeType()):(this.error(c.DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,y.signature.returnType.range),g.createUnreachable())},t.prototype.ensureTrampoline=function(e){var t=e.trampoline;if(t)return t;var r=e.signature,n=e.internalName,i=r.parameterTypes,a=e.prototype.declaration.signature.parameters,s=r.returnType,o=r.thisType,h=e.is(p.CommonFlags.INSTANCE),d=r.requiredParameters,m=d,g=i.length,y=g;h&&(++m,++y);var E=assert(y-m),f=new Array(m),T=0,I=this.module;h&&(f[0]=I.createGetLocal(0,this.options.nativeSizeType),T=1);for(var v=0;v<d;++v,++T)f[T]=I.createGetLocal(T,i[v].toNativeType());assert(T==m);var A=new _.Signature(i,s,o),C=n+"|trampoline";A.requiredParameters=g,(t=new u.Function(e.prototype,C,A,e.parent,e.contextualTypeArguments)).set(e.flags|p.CommonFlags.TRAMPOLINE|p.CommonFlags.COMPILED),e.trampoline=t;var N=this.currentFunction;this.currentFunction=t;var O=E+1,S=new Array(O),L="of"+E.toString(10);for(v=0;v<O;++v){var b=v.toString(10)+L;S[v]=b}var k=I.createBlock(S[0],[I.createBlock("outOfRange",[I.createSwitch(S,"outOfRange",d?I.createBinary(l.BinaryOp.SubI32,I.createGetGlobal("~argc",1),I.createI32(d)):I.createGetGlobal("~argc",1))]),I.createUnreachable()]);for(v=0;v<E;++v,++T){var R=i[d+v],x=a[d+v],F=x.initializer,D=void 0;F?D=I.createSetLocal(T,this.compileExpression(F,R,1,1)):(this.error(c.DiagnosticCode.Optional_parameter_must_have_an_initializer,x.range),D=I.createUnreachable()),k=I.createBlock(S[v+1],[k,D]),f[T]=I.createGetLocal(T,R.toNativeType())}this.currentFunction=N,assert(T==y);var B=I.addFunction(C,this.ensureFunctionType(A.parameterTypes,A.returnType,A.thisType),_.typesToNativeTypes(t.additionalLocals),I.createBlock(null,[k,I.createCall(n,f,s.toNativeType())],s.toNativeType()));return t.finalize(I,B),t},t.prototype.ensureArgcVar=function(){if(!this.argcVar){var e=this.module;this.argcVar=e.addGlobal("~argc",1,!0,e.createI32(0))}return"~argc"},t.prototype.ensureArgcSet=function(){if(!this.argcSet){var e=this.module;this.argcSet=e.addFunction("~setargc",this.ensureFunctionType([_.Type.u32],_.Type.void),null,e.createSetGlobal(this.ensureArgcVar(),e.createGetLocal(0,1))),e.addFunctionExport("~setargc","_setargc")}return"~setargc"},t.prototype.makeCallDirect=function(e,t){void 0===t&&(t=null);var r=t?t.length:0,n=r,i=e.signature.requiredParameters,a=e.signature.parameterTypes.length,s=a;e.is(p.CommonFlags.INSTANCE)&&(++i,++s,--n),assert(r>=i);var o=this.module;if(!this.compileFunction(e))return o.createUnreachable();var c=e.signature.returnType,l=e.is(p.CommonFlags.MODULE_IMPORT);if(r<s){t||((t=new Array(s)).length=0);for(var u=e.signature.parameterTypes,h=e.prototype.declaration.signature.parameters,_=!0,m=n;m<a;++m){var g=h[m].initializer;if(null===g||!d.nodeIsConstantValue(g.kind)){_=!1;break}}if(_)for(m=n;m<a;++m)t.push(this.compileExpression(h[m].initializer,u[m],1,0));else{for(m=n;m<a;++m)t.push(u[m].toNativeZero(o));if(!l){var y=e;if(e=this.ensureTrampoline(e),!this.compileFunction(e))return o.createUnreachable();e.flow.flags=y.flow.flags,this.program.instancesLookup.set(e.internalName,e);var E=c.toNativeType();return this.currentType=c,o.createBlock(null,[o.createSetGlobal(this.ensureArgcVar(),o.createI32(n)),o.createCall(e.internalName,t,E)],E)}}}return this.currentType=c,l?o.createCallImport(e.internalName,t,c.toNativeType()):o.createCall(e.internalName,t,c.toNativeType())},t.prototype.compileCallIndirect=function(e,t,r,n,i){void 0===i&&(i=0);var a=r.length;if(!this.checkCallSignature(e,a,0!=i,n))return this.module.createUnreachable();var s=i?a+1:a,o=new Array(s),c=0;i&&(o[0]=i,c=1);for(var l=e.parameterTypes,p=0;p<a;++p,++c)o[c]=this.compileExpression(r[p],l[p],1,0);return assert(c==s),this.makeCallIndirect(e,t,o)},t.prototype.makeCallIndirect=function(e,t,r){void 0===r&&(r=null);var n=r?r.length:0,i=n,a=e.requiredParameters,s=e.parameterTypes.length,o=s;e.thisType&&(++a,++o,--i),assert(n>=a),this.ensureFunctionType(e.parameterTypes,e.returnType,e.thisType);var c=this.module;if(n<o){r||((r=new Array(o)).length=0);for(var l=e.parameterTypes,p=i;p<s;++p)r.push(l[p].toNativeZero(c))}var u=e.returnType;return this.currentType=u,c.createBlock(null,[c.createSetGlobal(this.ensureArgcVar(),c.createI32(i)),c.createCallIndirect(t,r,e.toSignatureString())],u.toNativeType())},t.prototype.compileCommaExpression=function(e,t){for(var r=e.expressions,n=r.length,i=new Array(n--),a=0;a<n;++a)i[a]=this.compileExpression(r[a],_.Type.void,2,0);return i[n]=this.compileExpression(r[n],t,1,0),this.module.createBlock(null,i,this.currentType.toNativeType())},t.prototype.compileElementAccessExpression=function(e,t){var r=this.resolver.resolveElementAccess(e,this.currentFunction);if(!r)return this.module.createUnreachable();switch(r.kind){case u.ElementKind.CLASS:var n=this.currentFunction.flow.is(4096),i=r.lookupOverload(u.OperatorKind.INDEXED_GET,n);if(!i)return this.error(c.DiagnosticCode.Index_signature_is_missing_in_type_0,e.expression.range,r.internalName),this.module.createUnreachable();var a=this.compileExpression(e.expression,r.type,1,0);return this.compileCallDirect(i,[e.elementExpression],e,a)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()},t.prototype.compileFunctionExpression=function(e,t){var r=e.declaration,n=r.name,i=(n.text.length?n.text:"anonymous")+"|"+this.functionTable.length.toString(10),a=this.currentFunction,s=new u.FunctionPrototype(this.program,i,a.internalName+p.INNER_DELIMITER+i,r,null,u.DecoratorFlags.NONE),o=a.flow,c=this.compileFunctionUsingTypeArguments(s,[],o.contextualTypeArguments,o,r);if(!c)return this.module.createUnreachable();this.currentType=c.signature.type;var l=this.ensureFunctionTableEntry(c);return l<0?this.module.createUnreachable():this.module.createI32(l)},t.prototype.compileIdentifierExpression=function(e,t,r){var n=this.module,i=this.currentFunction;switch(e.kind){case d.NodeKind.NULL:var a=this.options;return t.classReference||(this.currentType=a.usizeType),a.isWasm64?n.createI64(0):n.createI32(0);case d.NodeKind.TRUE:return this.currentType=_.Type.bool,n.createI32(1);case d.NodeKind.FALSE:return this.currentType=_.Type.bool,n.createI32(0);case d.NodeKind.THIS:if((l=i.flow).is(2048))if(h=l.getScopedLocal("this"))return this.currentType=h.type,n.createGetLocal(h.index,h.type.toNativeType());if(i.is(p.CommonFlags.INSTANCE)){var s=assert(i.parent);assert(s.kind==u.ElementKind.CLASS);var o=s.type;return i.is(p.CommonFlags.CONSTRUCTOR)&&!l.is(32)?(l.set(32),this.currentType=o,n.createTeeLocal(0,this.makeConditionalAllocate(s,e))):(this.currentType=o,n.createGetLocal(0,o.toNativeType()))}return this.error(c.DiagnosticCode._this_cannot_be_referenced_in_current_location,e.range),this.currentType=this.options.usizeType,n.createUnreachable();case d.NodeKind.SUPER:var l,h;if((l=i.flow).is(2048))if(h=l.getScopedLocal("this"))if(m=assert(h.type.classReference).base)return this.currentType=m.type,n.createGetLocal(h.index,m.type.toNativeType());if(i.is(p.CommonFlags.INSTANCE)){var m;s=assert(i.parent);if(assert(s.kind==u.ElementKind.CLASS),m=s.base){var g=m.type;return this.currentType=g,n.createGetLocal(0,g.toNativeType())}}return this.error(c.DiagnosticCode._super_can_only_be_referenced_in_a_derived_class,e.range),this.currentType=this.options.usizeType,n.createUnreachable()}var y=this.resolver.resolveIdentifier(e,this.currentEnum||i);if(!y)return n.createUnreachable();switch(y.kind){case u.ElementKind.LOCAL:var E=y.type;if(assert(E!=_.Type.void),y.is(p.CommonFlags.INLINED))return this.compileInlineConstant(y,t,r);var f=y.index;return assert(f>=0),this.currentType=E,this.module.createGetLocal(f,E.toNativeType());case u.ElementKind.GLOBAL:if(!this.compileGlobal(y))return this.module.createUnreachable();var T=y.type;return assert(T!=_.Type.void),y.is(p.CommonFlags.INLINED)?this.compileInlineConstant(y,t,r):(this.currentType=T,this.module.createGetGlobal(y.internalName,T.toNativeType()));case u.ElementKind.ENUMVALUE:return y.is(p.CommonFlags.COMPILED)?(this.currentType=_.Type.i32,y.is(p.CommonFlags.INLINED)?this.module.createI32(y.constantValue):this.module.createGetGlobal(y.internalName,1)):(this.error(c.DiagnosticCode.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums,e.range),this.currentType=_.Type.i32,this.module.createUnreachable());case u.ElementKind.FUNCTION_PROTOTYPE:var I=this.resolver.resolveFunction(y,null,i.flow.contextualTypeArguments);if(!I||!this.compileFunction(I))return n.createUnreachable();var v=this.ensureFunctionTableEntry(I);return this.currentType=I.signature.type,this.module.createI32(v)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()},t.prototype.compileInstanceOfExpression=function(e,t){var r=this.module,n=this.compileExpressionRetainType(e.expression,this.options.usizeType,0),i=this.currentType,a=this.resolver.resolveType(e.isType);return this.currentType=_.Type.bool,a?i.is(512)&&!a.is(512)?i.nonNullableType.isAssignableTo(a)?r.createBinary(i.is(64)?l.BinaryOp.NeI64:l.BinaryOp.NeI32,n,i.toNativeZero(r)):r.createI32(0):r.createI32(i.isAssignableTo(a,!0)?1:0):r.createUnreachable()},t.prototype.compileLiteralExpression=function(e,t,r){void 0===r&&(r=!1);var n=this.module;switch(e.literalKind){case d.LiteralKind.ARRAY:assert(!r);var i=t.classReference;return i&&i.prototype==this.program.arrayPrototype?this.compileArrayLiteral(assert(i.typeArguments)[0],e.elementExpressions,!1,e):(this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable());case d.LiteralKind.FLOAT:var a=e.value;return r&&(a=-a),t==_.Type.f32?n.createF32(a):(this.currentType=_.Type.f64,n.createF64(a));case d.LiteralKind.INTEGER:var s=e.value;switch(r&&(s=i64_sub(i64_new(0),s)),t.kind){case 0:if(i64_is_i8(s))return n.createI32(i64_low(s));break;case 5:if(i64_is_u8(s))return n.createI32(i64_low(s));break;case 1:if(i64_is_i16(s))return n.createI32(i64_low(s));break;case 6:if(i64_is_u16(s))return n.createI32(i64_low(s));break;case 2:if(i64_is_i32(s))return n.createI32(i64_low(s));break;case 7:if(i64_is_u32(s))return n.createI32(i64_low(s));break;case 10:if(i64_is_bool(s))return n.createI32(i64_low(s));break;case 4:if(!this.options.isWasm64){if(i64_is_i32(s))return n.createI32(i64_low(s));break}return n.createI64(i64_low(s),i64_high(s));case 9:if(!this.options.isWasm64){if(i64_is_u32(s))return n.createI32(i64_low(s));break}return n.createI64(i64_low(s),i64_high(s));case 3:case 8:return n.createI64(i64_low(s),i64_high(s));case 11:if(i64_is_f32(s))return n.createF32(i64_to_f32(s));break;case 12:if(i64_is_f64(s))return n.createF64(i64_to_f64(s));break;case 13:break;default:return assert(!1),n.createUnreachable()}return i64_is_i32(s)?(this.currentType=_.Type.i32,n.createI32(i64_low(s))):i64_is_u32(s)?(this.currentType=_.Type.u32,n.createI32(i64_low(s))):(this.currentType=_.Type.i64,n.createI64(i64_low(s),i64_high(s)));case d.LiteralKind.STRING:return assert(!r),this.compileStringLiteral(e);case d.LiteralKind.OBJECT:return assert(!r),this.compileObjectLiteral(e,t)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.currentType=t,n.createUnreachable()},t.prototype.ensureStaticString=function(e){var t,r=this.program,n=r.hasGC,i=r.gcHeaderSize,a=assert(r.stringInstance),s=this.stringSegments;if(s.has(e))t=s.get(e);else{var c=e.length,l=a.currentMemoryOffset+1&-2,p=l+2*c,u=void 0,h=void 0;n?(u=new Uint8Array(i+p),h=i,m.writeI32(o.ensureGCHook(this,a),u,r.gcHookOffset)):(u=new Uint8Array(p),h=0),m.writeI32(c,u,h+a.offsetof("length")),h+=l;for(var d=0;d<c;++d)m.writeI16(e.charCodeAt(d),u,h+(d<<1));t=this.addMemorySegment(u),s.set(e,t)}var _=t.offset;return n&&(_=i64_add(_,i64_new(i))),this.currentType=a.type,this.options.isWasm64?this.module.createI64(i64_low(_),i64_high(_)):(assert(i64_is_u32(_)),this.module.createI32(i64_low(_)))},t.prototype.compileStringLiteral=function(e){return this.ensureStaticString(e.value)},t.prototype.ensureStaticArray=function(e,t){var r,n,i=this.program,a=i.hasGC,s=i.gcHeaderSize,c=t.length,p=e.byteSize,u=c*p,h=this.options.usizeType.byteSize,d=assert(i.arrayBufferInstance),_=d.currentMemoryOffset+7&-8,g=1<<32-clz(_+u-1);a?(r=new Uint8Array(s+g),n=s,m.writeI32(o.ensureGCHook(this,d),r,i.gcHookOffset)):(r=new Uint8Array(g),n=0),m.writeI32(u,r,n+d.offsetof("byteLength")),n+=_;var y=e.toNativeType();switch(y){case 1:switch(p){case 1:for(var E=0;E<c;++E){var f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeI8(l.getConstValueI32(f),r,n),n+=1}break;case 2:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeI16(l.getConstValueI32(f),r,n),n+=2}break;case 4:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeI32(l.getConstValueI32(f),r,n),n+=4}break;default:assert(!1)}break;case 2:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeI64(i64_new(l.getConstValueI64Low(f),l.getConstValueI64High(f)),r,n),n+=8}break;case 3:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeF32(l.getConstValueF32(f),r,n),n+=4}break;case 4:for(E=0;E<c;++E){f=t[E];assert(l.getExpressionType(f)==y),assert(l.getExpressionId(f)==l.ExpressionId.Const),m.writeF64(l.getConstValueF64(f),r,n),n+=8}break;default:assert(!1)}var T=this.addMemorySegment(r).offset;a&&(T=i64_add(T,i64_new(s)));var I=assert(i.arrayPrototype),v=assert(this.resolver.resolveClass(I,[e])),A=v.currentMemoryOffset+7&-8;a?(r=new Uint8Array(s+A),n=s,m.writeI32(o.ensureGCHook(this,v),r,i.gcHookOffset)):(r=new Uint8Array(A),n=0);var C=this.addMemorySegment(r).offset;return a&&(C=i64_add(C,i64_new(s))),this.currentType=v.type,8==h?(m.writeI64(T,r,n+v.offsetof("buffer_")),m.writeI32(c,r,n+v.offsetof("length_")),this.module.createI64(i64_low(C),i64_high(C))):(assert(i64_is_u32(T)),m.writeI32(i64_low(T),r,n+v.offsetof("buffer_")),m.writeI32(c,r,n+v.offsetof("length_")),assert(i64_is_u32(C)),this.module.createI32(i64_low(C)))},t.prototype.compileArrayLiteral=function(e,t,r,n){for(var i=this.module,a=t.length,s=new Array(a),o=new Array(a),p=e.toNativeType(),h=!0,d=0;d<a;++d){var _=t[d]?this.compileExpression(t[d],e,1,0):e.toNativeZero(i);s[d]=_,h&&(_=i.precomputeExpression(s[d]),l.getExpressionId(_)==l.ExpressionId.Const?(assert(l.getExpressionType(_)==p),o[d]=_):(r&&this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,n.range),h=!1))}if(h)return this.ensureStaticArray(e,o);var m=assert(this.program.arrayPrototype);if(!m||m.kind!=u.ElementKind.CLASS_PROTOTYPE)return i.createUnreachable();var g=this.resolver.resolveClass(m,[e]);if(!g)return i.createUnreachable();var y=g.type;this.currentType=y;var E=g.lookupOverload(u.OperatorKind.INDEXED_SET,!0);if(!E)return this.error(c.DiagnosticCode.Index_signature_in_type_0_only_permits_reading,n.range,g.internalName),i.createUnreachable();var f=y.toNativeType(),T=this.currentFunction,I=T.getTempLocal(y,!1),v=new Array(2+a),A=0;v[A++]=i.createSetLocal(I.index,this.makeCallDirect(assert(g.constructorInstance),[i.createI32(0),i.createI32(a)]));for(d=0;d<a;++d)v[A++]=this.makeCallDirect(E,[i.createGetLocal(I.index,f),i.createI32(d),s[d]]);return assert(A+1==v.length),v[A]=i.createGetLocal(I.index,f),T.freeTempLocal(I),this.currentType=y,i.createBlock(null,v,f)},t.prototype.compileObjectLiteral=function(e,t){var r=this.module,n=t.classReference;if(!n||n.is(p.CommonFlags.ABSTRACT))return this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,e.range,"<object>",t.toString()),r.createUnreachable();var i=n.constructorInstance;if(i){if(i.signature.requiredParameters)return this.error(c.DiagnosticCode.Constructor_of_class_0_must_not_require_any_arguments,e.range,n.toString()),r.createUnreachable();if(i.is(p.CommonFlags.PRIVATE))return this.error(c.DiagnosticCode.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration,e.range,n.toString()),r.createUnreachable();if(i.is(p.CommonFlags.PROTECTED))return this.error(c.DiagnosticCode.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration,e.range,n.toString()),r.createUnreachable()}var a=e.names,s=a.length,l=e.values,h=n.members,d=!1,_=new Array(s+2),m=this.currentFunction.getTempLocal(this.options.usizeType);assert(s==l.length);for(var g=0,y=s;g<y;++g){var E=h?h.get(a[g].text):null;if(E&&E.kind==u.ElementKind.FIELD){var f=E.type;_[g+1]=this.module.createStore(f.byteSize,this.module.createGetLocal(m.index,this.options.nativeSizeType),this.compileExpression(l[g],E.type,1,0),f.toNativeType(),E.memoryOffset)}else this.error(c.DiagnosticCode.Property_0_does_not_exist_on_type_1,a[g].range,a[g].text,n.toString()),d=!0}return this.currentType=n.type.nonNullableType,d?r.createUnreachable():(_[0]=r.createSetLocal(m.index,o.compileAllocate(this,n,e)),_[_.length-1]=r.createGetLocal(m.index,this.options.nativeSizeType),r.createBlock(null,_,this.options.nativeSizeType))},t.prototype.compileNewExpression=function(e,t){var r=this.module,n=this.options,i=this.currentFunction,a=this.resolver.resolveExpression(e.expression,i);if(!a)return r.createUnreachable();if(a.kind!=u.ElementKind.CLASS_PROTOTYPE)return this.error(c.DiagnosticCode.Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature,e.expression.range),this.module.createUnreachable();var s,o,l=a,h=null,d=e.typeArguments;if(!(h=!d&&null!==(s=t.classReference)&&s.is(p.CommonFlags.GENERIC)?this.resolver.resolveClass(l,s.typeArguments,i.flow.contextualTypeArguments):this.resolver.resolveClassInclTypeArguments(l,d,i.flow.contextualTypeArguments,e)))return r.createUnreachable();var _=h,m=null;do{if(m=_.constructorInstance)break}while(_=_.base);return o=m?this.compileCallDirect(m,e.arguments,e,n.usizeType.toNativeZero(r)):this.makeAllocate(h,e),this.currentType=h.type,o},t.prototype.compileParenthesizedExpression=function(e,t){return this.compileExpression(e.expression,t,0,0)},t.prototype.compilePropertyAccessExpression=function(e,t,r){var n=this.module,i=this.resolver.resolvePropertyAccess(e,this.currentFunction);if(!i)return n.createUnreachable();switch(i.kind){case u.ElementKind.GLOBAL:if(!this.compileGlobal(i))return n.createUnreachable();var a=i.type;return assert(a!=_.Type.void),i.is(p.CommonFlags.INLINED)?this.compileInlineConstant(i,t,r):(this.currentType=a,n.createGetGlobal(i.internalName,a.toNativeType()));case u.ElementKind.ENUMVALUE:var s=i.parent;return assert(null!==s&&s.kind==u.ElementKind.ENUM),this.compileEnum(s)?(this.currentType=_.Type.i32,i.is(p.CommonFlags.INLINED)?n.createI32(i.constantValue):n.createGetGlobal(i.internalName,1)):(this.currentType=_.Type.i32,this.module.createUnreachable());case u.ElementKind.FIELD:var o=assert(this.resolver.currentThisExpression);assert(i.memoryOffset>=0);var l=this.compileExpressionRetainType(o,this.options.usizeType,0);return this.currentType=i.type,n.createLoad(i.type.byteSize,i.type.is(5),l,i.type.toNativeType(),i.memoryOffset);case u.ElementKind.PROPERTY:return this.compileGetter(i,e);case u.ElementKind.FUNCTION_PROTOTYPE:return this.error(c.DiagnosticCode.Cannot_access_method_0_without_calling_it_as_it_requires_this_to_be_set,e.range,i.simpleName),n.createUnreachable()}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()},t.prototype.compileGetter=function(e,t){var r=e.getterPrototype;if(r){var n=this.resolver.resolveFunction(r,null);if(!n)return this.module.createUnreachable();var i=n.signature;if(!this.checkCallSignature(i,0,n.is(p.CommonFlags.INSTANCE),t))return this.module.createUnreachable();var a=0!=(n.decoratorFlags&u.DecoratorFlags.INLINE);if(n.is(p.CommonFlags.INSTANCE)){var s=assert(n.parent);assert(s.kind==u.ElementKind.CLASS);var o=assert(this.resolver.currentThisExpression),l=this.compileExpressionRetainType(o,this.options.usizeType,0);//!!!
 return this.currentType=i.returnType,this.compileCallDirect(n,[],t,l,a)}return this.currentType=i.returnType,this.compileCallDirect(n,[],t,0,a)}return this.error(c.DiagnosticCode.Property_0_does_not_exist_on_type_1,t.range,e.simpleName,e.parent.toString()),this.module.createUnreachable()},t.prototype.compileTernaryExpression=function(e,t){var r=e.ifThen,n=e.ifElse,i=this.currentFunction,a=i.flow,s=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType);if(!this.options.noTreeShaking||this.currentFunction.isAny(p.CommonFlags.GENERIC|p.CommonFlags.GENERIC_CONTEXT)){var o=this.module.precomputeExpression(s);if(l.getExpressionId(o)==l.ExpressionId.Const&&1==l.getExpressionType(o))return l.getConstValueI32(o)?this.compileExpressionRetainType(r,t,0):this.compileExpressionRetainType(n,t,0);s=this.makeIsTrueish(this.compileExpressionRetainType(e.condition,_.Type.bool,0),this.currentType)}var u=a.fork();i.flow=u;var h=this.compileExpressionRetainType(r,t,0),d=this.currentType;u.free();var m=a.fork();i.flow=m;var g=this.compileExpressionRetainType(n,t,0),y=this.currentType;i.flow=m.free(),a.inheritMutual(u,m);var E=_.Type.commonCompatible(d,y,!1);return E?(h=this.convertExpression(h,d,E,1,0,r),g=this.convertExpression(g,y,E,1,0,n),this.currentType=E,this.module.createIf(s,h,g)):(this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,e.range,d.toString(),y.toString()),this.currentType=t,this.module.createUnreachable())},t.prototype.compileUnaryPostfixExpression=function(e,t){var r=this.module,n=this.currentFunction,i=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,0);if(l.getExpressionId(i)==l.ExpressionId.Unreachable)return i;var a,s,o,p=this.currentType;switch(e.operator){case h.Token.PLUS_PLUS:if(this.currentType.is(256))return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable();switch(p.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:a=l.BinaryOp.AddI32,s=1,o=r.createI32(1);break;case 9:case 4:a=(u=this.options).isWasm64?l.BinaryOp.AddI64:l.BinaryOp.AddI32,s=u.nativeSizeType,o=p.toNativeOne(r);break;case 3:case 8:a=l.BinaryOp.AddI64,s=2,o=r.createI64(1);break;case 11:a=l.BinaryOp.AddF32,s=3,o=r.createF32(1);break;case 12:a=l.BinaryOp.AddF64,s=4,o=r.createF64(1);break;default:return assert(!1),r.createUnreachable()}break;case h.Token.MINUS_MINUS:if(this.currentType.is(256))return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable();switch(p.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:a=l.BinaryOp.SubI32,s=1,o=r.createI32(1);break;case 9:case 4:var u;a=(u=this.options).isWasm64?l.BinaryOp.SubI64:l.BinaryOp.SubI32,s=u.nativeSizeType,o=p.toNativeOne(r);break;case 3:case 8:a=l.BinaryOp.SubI64,s=2,o=r.createI64(1);break;case 11:a=l.BinaryOp.SubF32,s=3,o=r.createF32(1);break;case 12:a=l.BinaryOp.SubF64,s=4,o=r.createF64(1);break;default:return assert(!1),r.createUnreachable()}break;default:return assert(!1),r.createUnreachable()}if(t==_.Type.void)return this.compileAssignmentWithValue(e.operand,r.createBinary(a,i,o),!1);var d=n.getTempLocal(p,!1),m=this.compileAssignmentWithValue(e.operand,r.createBinary(a,this.module.createGetLocal(d.index,s),o),!1);this.currentType=assert(d).type,n.freeTempLocal(d);var g=d.index;return r.createBlock(null,[r.createSetLocal(g,i),m,r.createGetLocal(g,s)],s)},t.prototype.compileUnaryPrefixExpression=function(e,t){var r,n=this.module,i=!1;switch(e.operator){case h.Token.PLUS:if(r=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,0),this.currentType.is(256)){if(a=this.currentType.classReference)if(s=a.lookupOverload(u.OperatorKind.PLUS)){r=this.compileUnaryOverload(s,e.operand,r,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()}break;case h.Token.MINUS:if(e.operand.kind==d.NodeKind.LITERAL&&(e.operand.literalKind==d.LiteralKind.INTEGER||e.operand.literalKind==d.LiteralKind.FLOAT)){r=this.compileLiteralExpression(e.operand,t,!0),this.options.sourceMap&&this.addDebugLocation(r,e.range);break}if(r=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,0),this.currentType.is(256)){if(a=this.currentType.classReference)if(s=a.lookupOverload(u.OperatorKind.MINUS)){r=this.compileUnaryOverload(s,e.operand,r,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()}switch(this.currentType.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:r=n.createBinary(l.BinaryOp.SubI32,n.createI32(0),r);break;case 9:case 4:r=n.createBinary(this.options.isWasm64?l.BinaryOp.SubI64:l.BinaryOp.SubI32,this.currentType.toNativeZero(n),r);break;case 3:case 8:r=n.createBinary(l.BinaryOp.SubI64,n.createI64(0),r);break;case 11:r=n.createUnary(l.UnaryOp.NegF32,r);break;case 12:r=n.createUnary(l.UnaryOp.NegF64,r);break;default:assert(!1),r=n.createUnreachable()}break;case h.Token.PLUS_PLUS:if(i=!0,r=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,0),this.currentType.is(256)){if(a=this.currentType.classReference)if(s=a.lookupOverload(u.OperatorKind.PREFIX_INC)){r=this.compileUnaryOverload(s,e.operand,r,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()}switch(this.currentType.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:r=n.createBinary(l.BinaryOp.AddI32,r,this.module.createI32(1));break;case 9:case 4:r=n.createBinary(this.options.isWasm64?l.BinaryOp.AddI64:l.BinaryOp.AddI32,r,this.currentType.toNativeOne(n));break;case 3:case 8:r=n.createBinary(l.BinaryOp.AddI64,r,n.createI64(1));break;case 11:r=n.createBinary(l.BinaryOp.AddF32,r,n.createF32(1));break;case 12:r=n.createBinary(l.BinaryOp.AddF64,r,n.createF64(1));break;default:assert(!1),r=n.createUnreachable()}break;case h.Token.MINUS_MINUS:if(i=!0,r=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,0),this.currentType.is(256)){if(a=this.currentType.classReference)if(s=a.lookupOverload(u.OperatorKind.PREFIX_DEC)){r=this.compileUnaryOverload(s,e.operand,r,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()}switch(this.currentType.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:r=n.createBinary(l.BinaryOp.SubI32,r,n.createI32(1));break;case 9:case 4:r=n.createBinary(this.options.isWasm64?l.BinaryOp.SubI64:l.BinaryOp.SubI32,r,this.currentType.toNativeOne(n));break;case 3:case 8:r=n.createBinary(l.BinaryOp.SubI64,r,n.createI64(1));break;case 11:r=n.createBinary(l.BinaryOp.SubF32,r,n.createF32(1));break;case 12:r=n.createBinary(l.BinaryOp.SubF64,r,n.createF64(1));break;default:assert(!1),r=n.createUnreachable()}break;case h.Token.EXCLAMATION:if(r=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,0),this.currentType.is(256))if(a=this.currentType.classReference)if(s=a.lookupOverload(u.OperatorKind.NOT)){r=this.compileUnaryOverload(s,e.operand,r,e);break}r=this.makeIsFalseish(r,this.currentType),this.currentType=_.Type.bool;break;case h.Token.TILDE:if(r=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t.is(8)?_.Type.i64:t,0,0),this.currentType.is(256)){var a,s;if(a=this.currentType.classReference)if(s=a.lookupOverload(u.OperatorKind.BITWISE_NOT)){r=this.compileUnaryOverload(s,e.operand,r,e);break}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()}switch(r=this.convertExpression(r,this.currentType,this.currentType.intType,1,0,e.operand),this.currentType.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:r=n.createBinary(l.BinaryOp.XorI32,r,n.createI32(-1));break;case 9:case 4:r=n.createBinary(this.options.isWasm64?l.BinaryOp.XorI64:l.BinaryOp.XorI32,r,this.currentType.toNativeNegOne(n));break;case 3:case 8:r=n.createBinary(l.BinaryOp.XorI64,r,n.createI64(-1,-1));break;default:assert(!1),r=n.createUnreachable()}break;case h.Token.TYPEOF:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable();default:return assert(!1),n.createUnreachable()}return i?this.compileAssignmentWithValue(e.operand,r,t!=_.Type.void):r},t.prototype.ensureSmallIntegerWrap=function(e,t){var r=this.module,n=this.currentFunction.flow;switch(t.kind){case 0:n.canOverflow(e,t)&&(e=this.options.hasFeature(1)?r.createUnary(l.UnaryOp.ExtendI8ToI32,e):r.createBinary(l.BinaryOp.ShrI32,r.createBinary(l.BinaryOp.ShlI32,e,r.createI32(24)),r.createI32(24)));break;case 1:n.canOverflow(e,t)&&(e=this.options.hasFeature(1)?r.createUnary(l.UnaryOp.ExtendI16ToI32,e):r.createBinary(l.BinaryOp.ShrI32,r.createBinary(l.BinaryOp.ShlI32,e,r.createI32(16)),r.createI32(16)));break;case 5:n.canOverflow(e,t)&&(e=r.createBinary(l.BinaryOp.AndI32,e,r.createI32(255)));break;case 6:n.canOverflow(e,t)&&(e=r.createBinary(l.BinaryOp.AndI32,e,r.createI32(65535)));break;case 10:n.canOverflow(e,t)&&(e=r.createBinary(l.BinaryOp.AndI32,e,r.createI32(1)))}return e},t.prototype.makeIsFalseish=function(e,t){var r=this.module;switch(t.kind){case 0:case 1:case 5:case 6:case 10:e=this.ensureSmallIntegerWrap(e,t);case 2:case 7:return r.createUnary(l.UnaryOp.EqzI32,e);case 3:case 8:return r.createUnary(l.UnaryOp.EqzI64,e);case 9:case 4:return r.createUnary(64==t.size?l.UnaryOp.EqzI64:l.UnaryOp.EqzI32,e);case 11:return r.createBinary(l.BinaryOp.EqF32,e,r.createF32(0));case 12:return r.createBinary(l.BinaryOp.EqF64,e,r.createF64(0));default:return assert(!1),r.createI32(1)}},t.prototype.makeIsTrueish=function(e,t){var r=this.module;switch(t.kind){case 0:case 1:case 5:case 6:case 10:e=this.ensureSmallIntegerWrap(e,t);case 2:case 7:return e;case 3:case 8:return r.createBinary(l.BinaryOp.NeI64,e,r.createI64(0));case 9:case 4:return 64==t.size?r.createBinary(l.BinaryOp.NeI64,e,r.createI64(0)):e;case 11:return r.createBinary(l.BinaryOp.NeF32,e,r.createF32(0));case 12:return r.createBinary(l.BinaryOp.NeF64,e,r.createF64(0));default:return assert(!1),r.createI32(0)}},t.prototype.makeAllocate=function(e,t){var r,n,a=this.module,s=this.currentFunction,c=this.options.nativeSizeType,l=s.getTempLocal(e.type,!1),h=new Array;if(h.push(a.createSetLocal(l.index,o.compileAllocate(this,e,t))),e.members)try{for(var d=i(e.members.values()),_=d.next();!_.done;_=d.next()){var m=_.value;if(m.kind==u.ElementKind.FIELD){var g=m,y=g.type,E=y.toNativeType(),f=g.prototype.declaration;if(assert(!g.isAny(p.CommonFlags.CONST)),f.initializer)h.push(a.createStore(y.byteSize,a.createGetLocal(l.index,c),this.compileExpression(f.initializer,y,1,0),E,g.memoryOffset));else{var T=g.prototype.declaration.parameterIndex;h.push(a.createStore(y.byteSize,a.createGetLocal(l.index,c),T>=0?a.createGetLocal(1+T,E):y.toNativeZero(a),E,g.memoryOffset))}}}}catch(e){r={error:e}}finally{try{_&&!_.done&&(n=d.return)&&n.call(d)}finally{if(r)throw r.error}}return h.push(a.createGetLocal(l.index,c)),s.freeTempLocal(l),this.currentType=e.type,a.createBlock(null,h,c)},t.prototype.makeConditionalAllocate=function(e,t){var r=this.module,n=this.options.nativeSizeType;return this.currentType=e.type,r.createIf(2==n?r.createBinary(l.BinaryOp.NeI64,r.createGetLocal(0,2),r.createI64(0)):r.createGetLocal(0,1),r.createGetLocal(0,n),r.createTeeLocal(0,this.makeAllocate(e,t)))},t.prototype.addDebugLocation=function(e,t){var r=this.currentFunction,n=t.source;n.debugInfoIndex<0&&(n.debugInfoIndex=this.module.addDebugInfoFile(n.normalizedPath)),t.debugInfoRef=e,r.debugLocations.push(t)},t}(c.DiagnosticEmitter);function T(e,t,r){if(void 0===r&&(r=null),y=r?r.simpleName:t.range.source.simplePath,E=e.simpleName,e.hasDecorator(u.DecoratorFlags.EXTERNAL)){var n=e.program,i=assert(d.findDecorator(d.DecoratorKind.EXTERNAL,t.decorators)),a=i.arguments;if(a&&a.length){var s=a[0];s.kind==d.NodeKind.LITERAL&&s.literalKind==d.LiteralKind.STRING?(E=s.value,a.length>=2&&((s=a[1]).kind==d.NodeKind.LITERAL&&s.literalKind==d.LiteralKind.STRING?(y=E,E=s.value,a.length>2&&n.error(c.DiagnosticCode.Expected_0_arguments_but_got_1,i.range,"2",a.length.toString())):n.error(c.DiagnosticCode.String_literal_expected,s.range))):n.error(c.DiagnosticCode.String_literal_expected,s.range)}else n.error(c.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,i.range,"1","0")}}t.Compiler=f},function(e,t,r){"use strict";Object.defineProperty(t,"__esModule",{value:!0}),function(e){e[e.Operation_not_supported=100]="Operation_not_supported",e[e.Operation_is_unsafe=101]="Operation_is_unsafe",e[e.User_defined_0=102]="User_defined_0",e[e.Conversion_from_type_0_to_1_requires_an_explicit_cast=200]="Conversion_from_type_0_to_1_requires_an_explicit_cast",e[e.Conversion_from_type_0_to_1_will_require_an_explicit_cast_when_switching_between_32_64_bit=201]="Conversion_from_type_0_to_1_will_require_an_explicit_cast_when_switching_between_32_64_bit",e[e.Type_0_cannot_be_changed_to_type_1=202]="Type_0_cannot_be_changed_to_type_1",e[e.Type_0_cannot_be_reinterpreted_as_type_1=203]="Type_0_cannot_be_reinterpreted_as_type_1",e[e.Basic_type_0_cannot_be_nullable=204]="Basic_type_0_cannot_be_nullable",e[e.Cannot_export_a_mutable_global=205]="Cannot_export_a_mutable_global",e[e.Compiling_constant_with_non_constant_initializer_as_mutable=206]="Compiling_constant_with_non_constant_initializer_as_mutable",e[e.Unmanaged_classes_cannot_extend_managed_classes_and_vice_versa=207]="Unmanaged_classes_cannot_extend_managed_classes_and_vice_versa",e[e.Unmanaged_classes_cannot_implement_interfaces=208]="Unmanaged_classes_cannot_implement_interfaces",e[e.Invalid_regular_expression_flags=209]="Invalid_regular_expression_flags",e[e.Implementation_0_must_match_the_signature_1=210]="Implementation_0_must_match_the_signature_1",e[e.Class_0_is_sealed_and_cannot_be_extended=211]="Class_0_is_sealed_and_cannot_be_extended",e[e.Decorator_0_is_not_valid_here=212]="Decorator_0_is_not_valid_here",e[e.Duplicate_decorator=213]="Duplicate_decorator",e[e.An_allocator_must_be_declared_to_allocate_memory_Try_importing_allocator_arena_or_allocator_tlsf=214]="An_allocator_must_be_declared_to_allocate_memory_Try_importing_allocator_arena_or_allocator_tlsf",e[e.Optional_parameter_must_have_an_initializer=215]="Optional_parameter_must_have_an_initializer",e[e.Constructor_of_class_0_must_not_require_any_arguments=216]="Constructor_of_class_0_must_not_require_any_arguments",e[e.Function_0_cannot_be_inlined_into_itself=217]="Function_0_cannot_be_inlined_into_itself",e[e.Cannot_access_method_0_without_calling_it_as_it_requires_this_to_be_set=218]="Cannot_access_method_0_without_calling_it_as_it_requires_this_to_be_set",e[e.Unterminated_string_literal=1002]="Unterminated_string_literal",e[e.Identifier_expected=1003]="Identifier_expected",e[e._0_expected=1005]="_0_expected",e[e.A_file_cannot_have_a_reference_to_itself=1006]="A_file_cannot_have_a_reference_to_itself",e[e.Trailing_comma_not_allowed=1009]="Trailing_comma_not_allowed",e[e.Unexpected_token=1012]="Unexpected_token",e[e.A_rest_parameter_must_be_last_in_a_parameter_list=1014]="A_rest_parameter_must_be_last_in_a_parameter_list",e[e.Parameter_cannot_have_question_mark_and_initializer=1015]="Parameter_cannot_have_question_mark_and_initializer",e[e.A_required_parameter_cannot_follow_an_optional_parameter=1016]="A_required_parameter_cannot_follow_an_optional_parameter",e[e.Statements_are_not_allowed_in_ambient_contexts=1036]="Statements_are_not_allowed_in_ambient_contexts",e[e.Initializers_are_not_allowed_in_ambient_contexts=1039]="Initializers_are_not_allowed_in_ambient_contexts",e[e._0_modifier_cannot_be_used_here=1042]="_0_modifier_cannot_be_used_here",e[e.A_rest_parameter_cannot_be_optional=1047]="A_rest_parameter_cannot_be_optional",e[e.A_rest_parameter_cannot_have_an_initializer=1048]="A_rest_parameter_cannot_have_an_initializer",e[e.A_set_accessor_must_have_exactly_one_parameter=1049]="A_set_accessor_must_have_exactly_one_parameter",e[e.A_set_accessor_parameter_cannot_have_an_initializer=1052]="A_set_accessor_parameter_cannot_have_an_initializer",e[e.A_get_accessor_cannot_have_parameters=1054]="A_get_accessor_cannot_have_parameters",e[e.Enum_member_must_have_initializer=1061]="Enum_member_must_have_initializer",e[e.Type_parameters_cannot_appear_on_a_constructor_declaration=1092]="Type_parameters_cannot_appear_on_a_constructor_declaration",e[e.Type_annotation_cannot_appear_on_a_constructor_declaration=1093]="Type_annotation_cannot_appear_on_a_constructor_declaration",e[e.An_accessor_cannot_have_type_parameters=1094]="An_accessor_cannot_have_type_parameters",e[e.A_set_accessor_cannot_have_a_return_type_annotation=1095]="A_set_accessor_cannot_have_a_return_type_annotation",e[e.Type_parameter_list_cannot_be_empty=1098]="Type_parameter_list_cannot_be_empty",e[e.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement=1104]="A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement",e[e.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement=1105]="A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement",e[e.A_return_statement_can_only_be_used_within_a_function_body=1108]="A_return_statement_can_only_be_used_within_a_function_body",e[e.Expression_expected=1109]="Expression_expected",e[e.Type_expected=1110]="Type_expected",e[e.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement=1113]="A_default_clause_cannot_appear_more_than_once_in_a_switch_statement",e[e.Duplicate_label_0=1114]="Duplicate_label_0",e[e.Octal_literals_are_not_allowed_in_strict_mode=1121]="Octal_literals_are_not_allowed_in_strict_mode",e[e.Digit_expected=1124]="Digit_expected",e[e.Hexadecimal_digit_expected=1125]="Hexadecimal_digit_expected",e[e.Unexpected_end_of_text=1126]="Unexpected_end_of_text",e[e.Invalid_character=1127]="Invalid_character",e[e._case_or_default_expected=1130]="_case_or_default_expected",e[e.A_declare_modifier_cannot_be_used_in_an_already_ambient_context=1038]="A_declare_modifier_cannot_be_used_in_an_already_ambient_context",e[e.Type_argument_expected=1140]="Type_argument_expected",e[e.String_literal_expected=1141]="String_literal_expected",e[e.Line_break_not_permitted_here=1142]="Line_break_not_permitted_here",e[e.Declaration_expected=1146]="Declaration_expected",e[e._const_declarations_must_be_initialized=1155]="_const_declarations_must_be_initialized",e[e.Unterminated_regular_expression_literal=1161]="Unterminated_regular_expression_literal",e[e.Interface_declaration_cannot_have_implements_clause=1176]="Interface_declaration_cannot_have_implements_clause",e[e.Binary_digit_expected=1177]="Binary_digit_expected",e[e.Octal_digit_expected=1178]="Octal_digit_expected",e[e.An_implementation_cannot_be_declared_in_ambient_contexts=1183]="An_implementation_cannot_be_declared_in_ambient_contexts",e[e.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive=1198]="An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive",e[e.Unterminated_Unicode_escape_sequence=1199]="Unterminated_Unicode_escape_sequence",e[e.Decorators_are_not_valid_here=1206]="Decorators_are_not_valid_here",e[e._abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration=1242]="_abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration",e[e.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract=1245]="Method_0_cannot_have_an_implementation_because_it_is_marked_abstract",e[e.A_class_may_only_extend_another_class=1311]="A_class_may_only_extend_another_class",e[e.A_parameter_property_cannot_be_declared_using_a_rest_parameter=1317]="A_parameter_property_cannot_be_declared_using_a_rest_parameter",e[e.Duplicate_identifier_0=2300]="Duplicate_identifier_0",e[e.Cannot_find_name_0=2304]="Cannot_find_name_0",e[e.Module_0_has_no_exported_member_1=2305]="Module_0_has_no_exported_member_1",e[e.Generic_type_0_requires_1_type_argument_s=2314]="Generic_type_0_requires_1_type_argument_s",e[e.Type_0_is_not_generic=2315]="Type_0_is_not_generic",e[e.Type_0_is_not_assignable_to_type_1=2322]="Type_0_is_not_assignable_to_type_1",e[e.Index_signature_is_missing_in_type_0=2329]="Index_signature_is_missing_in_type_0",e[e._this_cannot_be_referenced_in_current_location=2332]="_this_cannot_be_referenced_in_current_location",e[e._super_can_only_be_referenced_in_a_derived_class=2335]="_super_can_only_be_referenced_in_a_derived_class",e[e.Property_0_does_not_exist_on_type_1=2339]="Property_0_does_not_exist_on_type_1",e[e.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures=2349]="Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures",e[e.Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature=2351]="Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature",e[e.A_function_whose_declared_type_is_not_void_must_return_a_value=2355]="A_function_whose_declared_type_is_not_void_must_return_a_value",e[e.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access=2357]="The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access",e[e.The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access=2364]="The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access",e[e.Operator_0_cannot_be_applied_to_types_1_and_2=2365]="Operator_0_cannot_be_applied_to_types_1_and_2",e[e._get_and_set_accessor_must_have_the_same_type=2380]="_get_and_set_accessor_must_have_the_same_type",e[e.Constructor_implementation_is_missing=2390]="Constructor_implementation_is_missing",e[e.Function_implementation_is_missing_or_not_immediately_following_the_declaration=2391]="Function_implementation_is_missing_or_not_immediately_following_the_declaration",e[e.Multiple_constructor_implementations_are_not_allowed=2392]="Multiple_constructor_implementations_are_not_allowed",e[e.Duplicate_function_implementation=2393]="Duplicate_function_implementation",e[e.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local=2395]="Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local",e[e.Type_0_has_no_property_1=2460]="Type_0_has_no_property_1",e[e.The_0_operator_cannot_be_applied_to_t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100:return"Operation not supported.";case 101:return"Operation is unsafe.";case 102:return"User-defined: {0}";case 200:return"Conversion from type '{0}' to '{1}' requires an explicit cast.";case 201:return"Conversion from type '{0}' to '{1}' will require an explicit cast when switching between 32/64-bit.";case 202:return"Type '{0}' cannot be changed to type '{1}'.";case 203:return"Type '{0}' cannot be reinterpreted as type '{1}'.";case 204:return"Basic type '{0}' cannot be nullable.";case 205:return"Cannot export a mutable global.";case 206:return"Compiling constant with non-constant initializer as mutable.";case 207:return"Unmanaged classes cannot extend managed classes and vice-versa.";case 208:return"Unmanaged classes cannot implement interfaces.";case 209:return"Invalid regular expression flags.";case 210:return"Implementation '{0}' must match the signature '{1}'.";case 211:return"Class '{0}' is sealed and cannot be extended.";case 212:return"Decorator '{0}' is not valid 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Type '{0}' has no compatible call signatures.";case 2351:return"Cannot use 'new' with an expression whose type lacks a construct signature.";case 2355:return"A function whose declared type is not 'void' must return a value.";case 2357:return"The operand of an increment or decrement operator must be a variable or a property access.";case 2364:return"The left-hand side of an assignment expression must be a variable or a property access.";case 2365:return"Operator '{0}' cannot be applied to types '{1}' and '{2}'.";case 2380:return"'get' and 'set' accessor must have the same type.";case 2390:return"Constructor implementation is missing.";case 2391:return"Function implementation is missing or not immediately following the declaration.";case 2392:return"Multiple constructor implementations are not allowed.";case 2393:return"Duplicate function implementation.";case 2395:return"Individual declarations in merged declaration '{0}' must be all exported or all local.";case 2460:return"Type '{0}' 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l=i.type;if(assert(l!=p.Type.void),!(u=l.classReference))return this.error(o.DiagnosticCode.Property_0_does_not_exist_on_type_1,e.property.range,a,i.type.toString()),null;i=u;break;case c.ElementKind.PROPERTY:var u,h=this.resolveFunction(assert(i.getterPrototype),null,null,r);if(!h)return null;if(!(u=h.signature.returnType.classReference))return this.error(o.DiagnosticCode.Property_0_does_not_exist_on_type_1,e.property.range,a,h.signature.returnType.toString()),null;i=u;break;case c.ElementKind.CLASS:var d=this.currentElementExpression;if(d){var _=i.lookupOverload(c.OperatorKind.INDEXED_GET);if(!_)return this.error(o.DiagnosticCode.Index_signature_is_missing_in_type_0,d.range,i.internalName),null;var m=_.signature.returnType;if(!(i=m.classReference))return this.error(o.DiagnosticCode.Property_0_does_not_exist_on_type_1,e.property.range,a,m.toString()),null}}switch(i.kind){case c.ElementKind.CLASS_PROTOTYPE:case c.ElementKind.CLASS:for(;;){var g=void 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e.currentType=s.Type.bool,I?I.is(8)?T.createI32(1):T.createI32(0):T.createUnreachable();case"isSigned":I=d(e,r,n,u);return e.currentType=s.Type.bool,I?I.is(1)?T.createI32(1):T.createI32(0):T.createUnreachable();case"isReference":I=d(e,r,n,u);return e.currentType=s.Type.bool,I?(e.currentType=s.Type.bool,I.is(256)?T.createI32(1):T.createI32(0)):T.createUnreachable();case"isString":I=d(e,r,n,u);if(e.currentType=s.Type.bool,!I)return T.createUnreachable();if(R=I.classReference){var v=e.program.stringInstance;if(v&&R.isAssignableTo(v))return T.createI32(1)}return T.createI32(0);case"isArray":I=d(e,r,n,u);return e.currentType=s.Type.bool,I?null!==(R=I.classReference)&&null!==R.lookupOverload(c.OperatorKind.INDEXED_GET)?T.createI32(1):T.createI32(0):T.createUnreachable();case"isDefined":if(e.currentType=s.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();var A=e.resolver.resolveExpression(n[0],e.currentFunction,l.ReportMode.SWALLOW);return T.createI32(A?1:0);case"isConstant":if(e.currentType=s.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();var C=e.compileExpressionRetainType(n[0],s.Type.i32,0);return e.currentType=s.Type.bool,T.createI32(o.getExpressionId(C)==o.ExpressionId.Const?1:0);case"isManaged":if(!e.program.hasGC)return e.currentType=s.Type.bool,T.createI32(0);I=d(e,r,n,u);return e.currentType=s.Type.bool,I?null===(R=I.classReference)||R.hasDecorator(c.DecoratorFlags.UNMANAGED)?T.createI32(0):T.createI32(1):T.createUnreachable();case"clz":if(1!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,1)}else g=e.compileExpression(n[0],s.Type.i32,0,1);switch(e.currentType.kind){case 0:case 1:case 5:case 6:f=T.createUnary(o.UnaryOp.ClzI32,g);break;case 10:case 2:case 7:f=T.createUnary(o.UnaryOp.ClzI32,g);break;case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}case 4:f=T.createUnary(e.options.isWasm64?o.UnaryOp.ClzI64:o.UnaryOp.ClzI32,g);break;case 3:case 8:f=T.createUnary(o.UnaryOp.ClzI64,g);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"ctz":if(1!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],0,1)}else g=e.compileExpression(n[0],s.Type.i32,0,1);switch(e.currentType.kind){case 0:case 1:case 5:case 6:f=T.createUnary(o.UnaryOp.CtzI32,g);break;case 10:case 2:case 7:f=T.createUnary(o.UnaryOp.CtzI32,g);break;case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}case 4:f=T.createUnary(e.options.isWasm64?o.UnaryOp.CtzI64:o.UnaryOp.CtzI32,g);break;case 3:case 8:f=T.createUnary(o.UnaryOp.CtzI64,g);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"popcnt":if(1!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,1)}else g=e.compileExpression(n[0],s.Type.i32,0,1);switch(e.currentType.kind){case 0:case 1:case 5:case 6:f=T.createUnary(o.UnaryOp.PopcntI32,g);break;case 10:case 2:case 7:f=T.createUnary(o.UnaryOp.PopcntI32,g);break;case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}case 4:f=T.createUnary(e.options.isWasm64?o.UnaryOp.PopcntI64:o.UnaryOp.PopcntI32,g);break;case 3:case 8:f=T.createUnary(o.UnaryOp.PopcntI64,g);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"rotl":if(2!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"2",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,1)}else g=e.compileExpression(n[0],s.Type.i32,0,1);switch(y=e.compileExpression(n[1],e.currentType,1,0),e.currentType.kind){case 0:case 1:case 5:case 6:case 10:f=e.ensureSmallIntegerWrap(T.createBinary(o.BinaryOp.RotlI32,g,y),e.currentType);case 2:case 7:f=T.createBinary(o.BinaryOp.RotlI32,g,y);break;case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}case 4:f=T.createBinary(e.options.isWasm64?o.BinaryOp.RotlI64:o.BinaryOp.RotlI32,g,y);break;case 3:case 8:f=T.createBinary(o.BinaryOp.RotlI64,g,y);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"rotr":if(2!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"2",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,1)}else g=e.compileExpression(n[0],s.Type.i32,0,1);switch(y=e.compileExpression(n[1],e.currentType,1,0),e.currentType.kind){case 0:case 1:case 5:case 6:case 10:f=e.ensureSmallIntegerWrap(T.createBinary(o.BinaryOp.RotrI32,g,y),e.currentType);break;case 2:case 7:f=T.createBinary(o.BinaryOp.RotrI32,g,y);break;case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}case 4:f=T.createBinary(e.options.isWasm64?o.BinaryOp.RotrI64:o.BinaryOp.RotrI32,g,y);break;case 3:case 8:f=T.createBinary(o.BinaryOp.RotrI64,g,y);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"abs":if(1!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,1)}else g=e.compileExpression(n[0],s.Type.f64,0,1);switch(e.currentType.kind){case 0:case 1:case 2:var N=e.currentFunction.getAndFreeTempLocal(s.Type.i32,!1);f=T.createSelect(T.createTeeLocal(N.index,g),T.createBinary(o.BinaryOp.SubI32,T.createI32(0),T.createGetLocal(N.index,1)),T.createBinary(o.BinaryOp.GtI32,T.createGetLocal(N.index,1),T.createI32(0)));break;case 4:N=e.currentFunction.getAndFreeTempLocal(e.options.usizeType,!1);f=T.createSelect(T.createTeeLocal(N.index,g),T.createBinary(e.options.isWasm64?o.BinaryOp.SubI64:o.BinaryOp.SubI32,e.options.usizeType.toNativeZero(T),T.createGetLocal(N.index,e.options.nativeSizeType)),T.createBinary(e.options.isWasm64?o.BinaryOp.GtI64:o.BinaryOp.GtI32,T.createGetLocal(N.index,e.options.nativeSizeType),e.options.usizeType.toNativeZero(T)));break;case 3:N=e.currentFunction.getAndFreeTempLocal(s.Type.i64,!1);f=T.createSelect(T.createTeeLocal(N.index,g),T.createBinary(o.BinaryOp.SubI64,T.createI64(0,0),T.createGetLocal(N.index,2)),T.createBinary(o.BinaryOp.GtI64,T.createGetLocal(N.index,2),T.createI64(0,0)));break;case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}case 5:case 6:case 7:case 8:case 10:f=g;break;case 11:f=T.createUnary(o.UnaryOp.AbsF32,g);break;case 12:f=T.createUnary(o.UnaryOp.AbsF64,g);break;case 13:f=T.createUnreachable();break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"max":if(2!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"2",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,1)}else g=e.compileExpression(n[0],s.Type.f64,0,1);switch(y=e.compileExpression(n[1],e.currentType,1,1),e.currentType.kind){case 0:case 1:case 2:var O=e.currentFunction.flow,S=e.currentFunction.getTempLocal(e.currentType,!O.canOverflow(g,e.currentType)),L=e.currentFunction.getAndFreeTempLocal(e.currentType,!O.canOverflow(y,e.currentType));e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(o.BinaryOp.GtI32,T.createGetLocal(S.index,1),T.createGetLocal(L.index,1)));break;case 5:case 6:case 7:case 10:O=e.currentFunction.flow,S=e.currentFunction.getTempLocal(e.currentType,!O.canOverflow(g,e.currentType)),L=e.currentFunction.getAndFreeTempLocal(e.currentType,!O.canOverflow(y,e.currentType));e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(o.BinaryOp.GtU32,T.createGetLocal(S.index,1),T.createGetLocal(L.index,1)));break;case 3:S=e.currentFunction.getTempLocal(s.Type.i64,!1),L=e.currentFunction.getAndFreeTempLocal(s.Type.i64,!1);e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(o.BinaryOp.GtI64,T.createGetLocal(S.index,2),T.createGetLocal(L.index,2)));break;case 8:S=e.currentFunction.getTempLocal(s.Type.i64,!1),L=e.currentFunction.getAndFreeTempLocal(s.Type.i64,!1);e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(o.BinaryOp.GtU64,T.createGetLocal(S.index,2),T.createGetLocal(L.index,2)));break;case 4:S=e.currentFunction.getTempLocal(e.options.usizeType,!1),L=e.currentFunction.getAndFreeTempLocal(e.options.usizeType,!1);e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(e.options.isWasm64?o.BinaryOp.GtI64:o.BinaryOp.GtI32,T.createGetLocal(S.index,e.options.nativeSizeType),T.createGetLocal(L.index,e.options.nativeSizeType)));break;case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}S=e.currentFunction.getTempLocal(e.options.usizeType,!1),L=e.currentFunction.getAndFreeTempLocal(e.options.usizeType,!1);e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(e.options.isWasm64?o.BinaryOp.GtU64:o.BinaryOp.GtU32,T.createGetLocal(S.index,e.options.nativeSizeType),T.createGetLocal(L.index,e.options.nativeSizeType)));break;case 11:f=T.createBinary(o.BinaryOp.MaxF32,g,y);break;case 12:f=T.createBinary(o.BinaryOp.MaxF64,g,y);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"min":if(2!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"2",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,1)}else g=e.compileExpression(n[0],s.Type.f64,0,1);switch(y=e.compileExpression(n[1],e.currentType,1,1),e.currentType.kind){case 0:case 1:case 2:O=e.currentFunction.flow,S=e.currentFunction.getTempLocal(e.currentType,!O.canOverflow(g,e.currentType)),L=e.currentFunction.getAndFreeTempLocal(e.currentType,!O.canOverflow(y,e.currentType));e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(o.BinaryOp.LtI32,T.createGetLocal(S.index,1),T.createGetLocal(L.index,1)));break;case 5:case 6:case 7:case 10:O=e.currentFunction.flow,S=e.currentFunction.getTempLocal(e.currentType,!O.canOverflow(g,e.currentType)),L=e.currentFunction.getAndFreeTempLocal(e.currentType,!O.canOverflow(y,e.currentType));e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(o.BinaryOp.LtU32,T.createGetLocal(S.index,1),T.createGetLocal(L.index,1)));break;case 3:S=e.currentFunction.getTempLocal(s.Type.i64,!1),L=e.currentFunction.getAndFreeTempLocal(s.Type.i64,!1);e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(o.BinaryOp.LtI64,T.createGetLocal(S.index,2),T.createGetLocal(L.index,2)));break;case 8:S=e.currentFunction.getTempLocal(s.Type.i64,!1),L=e.currentFunction.getAndFreeTempLocal(s.Type.i64,!1);e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(o.BinaryOp.LtU64,T.createGetLocal(S.index,2),T.createGetLocal(L.index,2)));break;case 4:S=e.currentFunction.getTempLocal(e.options.usizeType,!1),L=e.currentFunction.getAndFreeTempLocal(e.options.usizeType,!1);e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(e.options.isWasm64?o.BinaryOp.LtI64:o.BinaryOp.LtI32,T.createGetLocal(S.index,e.options.nativeSizeType),T.createGetLocal(L.index,e.options.nativeSizeType)));break;case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}S=e.currentFunction.getTempLocal(e.options.usizeType,!1),L=e.currentFunction.getAndFreeTempLocal(e.options.usizeType,!1);e.currentFunction.freeTempLocal(S),f=T.createSelect(T.createTeeLocal(S.index,g),T.createTeeLocal(L.index,y),T.createBinary(e.options.isWasm64?o.BinaryOp.LtU64:o.BinaryOp.LtU32,T.createGetLocal(S.index,e.options.nativeSizeType),T.createGetLocal(L.index,e.options.nativeSizeType)));break;case 11:f=T.createBinary(o.BinaryOp.MinF32,g,y);break;case 12:f=T.createBinary(o.BinaryOp.MinF64,g,y);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"ceil":if(1!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,0)}else g=e.compileExpression(n[0],s.Type.f64,0,0);switch(e.currentType.kind){case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}default:f=g;break;case 11:f=T.createUnary(o.UnaryOp.CeilF32,g);break;case 12:f=T.createUnary(o.UnaryOp.CeilF64,g);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"floor":if(1!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,0)}else g=e.compileExpression(n[0],s.Type.f64,0,0);switch(e.currentType.kind){case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}default:f=g;break;case 11:f=T.createUnary(o.UnaryOp.FloorF32,g);break;case 12:f=T.createUnary(o.UnaryOp.FloorF64,g);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"copysign":if(2!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"2",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,0)}else g=e.compileExpression(n[0],s.Type.f64,0,0);switch(y=e.compileExpression(n[1],e.currentType,1,0),e.currentType.kind){case 11:f=T.createBinary(o.BinaryOp.CopysignF32,g,y);break;case 12:f=T.createBinary(o.BinaryOp.CopysignF64,g,y);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"nearest":if(1!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,0)}else g=e.compileExpression(n[0],s.Type.f64,0,0);switch(e.currentType.kind){case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}default:f=g;break;case 11:f=T.createUnary(o.UnaryOp.NearestF32,g);break;case 12:f=T.createUnary(o.UnaryOp.NearestF64,g);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"reinterpret":if(1!=n.length)return r&&1==r.length||(r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0")),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(!r||1!=r.length)return r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),T.createUnreachable();switch(r[0].kind){case 2:case 7:g=e.compileExpression(n[0],s.Type.f32,1,0),f=T.createUnary(o.UnaryOp.ReinterpretF32,g);break;case 3:case 8:g=e.compileExpression(n[0],s.Type.f64,1,0),f=T.createUnary(o.UnaryOp.ReinterpretF64,g);break;case 9:if(r[0].is(256))return e.error(i.DiagnosticCode.Operation_not_supported,u.range),e.currentType=r[0],T.createUnreachable();case 4:g=e.compileExpression(n[0],e.options.isWasm64?s.Type.f64:s.Type.f32,1,0),f=T.createUnary(e.options.isWasm64?o.UnaryOp.ReinterpretF64:o.UnaryOp.ReinterpretF32,g);break;case 11:g=e.compileExpression(n[0],s.Type.i32,1,0),f=T.createUnary(o.UnaryOp.ReinterpretI32,g);break;case 12:g=e.compileExpression(n[0],s.Type.i64,1,0),f=T.createUnary(o.UnaryOp.ReinterpretI64,g);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return e.currentType=r[0],f;case"sqrt":if(1!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,0)}else g=e.compileExpression(n[0],s.Type.f64,0,0);switch(e.currentType.kind){case 11:f=T.createUnary(o.UnaryOp.SqrtF32,g);break;case 12:f=T.createUnary(o.UnaryOp.SqrtF64,g);break;default:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"trunc":if(1!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(r&&r.length){if(e.currentType=r[0],1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,0)}else g=e.compileExpression(n[0],s.Type.f64,0,0);switch(e.currentType.kind){case 9:if(e.currentType.is(256)){e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable();break}default:f=g;break;case 11:f=T.createUnary(o.UnaryOp.TruncF32,g);break;case 12:f=T.createUnary(o.UnaryOp.TruncF64,g);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"load":return n.length<1||n.length>2?(r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),n.length<1?e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,u.range,"1",n.length.toString(10)):e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"2",n.length.toString(10)),T.createUnreachable()):r&&1==r.length?(g=e.compileExpression(n[0],e.options.usizeType,1,0),(x=2==n.length?_(e,n[1]):0)<0?T.createUnreachable():(e.currentType=r[0],T.createLoad(r[0].byteSize,r[0].is(5),g,r[0].is(4)&&p.is(4)&&p.size>r[0].size?(e.currentType=p).toNativeType():(e.currentType=r[0]).toNativeType(),x))):(r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),T.createUnreachable());case"store":if(e.currentType=s.Type.void,n.length<2||n.length>3)return r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),n.length<2?e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,u.range,"2",n.length.toString(10)):e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"3",n.length.toString(10)),T.createUnreachable();if(!r||1!=r.length)return e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),T.createUnreachable();g=e.compileExpression(n[0],e.options.usizeType,1,0),y=e.compileExpression(n[1],r[0],r[0].is(4)?0:1,0);I=void 0;return r[0].is(4)&&(!e.currentType.is(4)||e.currentType.size<r[0].size)?(y=e.convertExpression(y,e.currentType,r[0],1,0,n[1]),I=r[0]):I=e.currentType,(x=3==n.length?_(e,n[2]):0)<0?T.createUnreachable():(e.currentType=s.Type.void,T.createStore(r[0].byteSize,g,y,I.toNativeType(),x));case"sizeof":if(e.currentType=e.options.usizeType,0!=n.length)return r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"0",n.length.toString(10)),T.createUnreachable();r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0");var b=r[0].byteSize;return e.options.isWasm64?p.is(4)&&p.size<=32?(e.currentType=s.Type.u32,f=T.createI32(b)):f=T.createI64(b,0):p.is(4)&&64==p.size?(e.currentType=s.Type.u64,f=T.createI64(b,0)):f=T.createI32(b),f;case"alignof":if(e.currentType=e.options.usizeType,0!=n.length)return r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"0",n.length.toString(10)),T.createUnreachable();if(!r||1!=r.length)return e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),T.createUnreachable();var k=void 0;switch(b=r[0].byteSize){case 1:k=0;break;case 2:k=1;break;case 4:k=2;break;case 8:k=3;break;default:return assert(!1),T.createUnreachable()}return e.options.isWasm64?p.is(4)&&p.size<=32?(e.currentType=s.Type.u32,f=T.createI32(k)):f=T.createI64(k,0):p.is(4)&&64==p.size?(e.currentType=s.Type.u64,f=T.createI64(k,0)):f=T.createI32(k),f;case"offsetof":if(e.currentType=e.options.usizeType,n.length>1)return r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();if(!r||1!=r.length)return e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),T.createUnreachable();var R;if(!(R=r[0].classReference))return e.error(i.DiagnosticCode.Operation_not_supported,u.range),T.createUnreachable();var x=void 0;if(n.length){if(n[0].kind!=a.NodeKind.LITERAL||n[0].literalKind!=a.LiteralKind.STRING)return e.error(i.DiagnosticCode.String_literal_expected,n[0].range),T.createUnreachable();var F=n[0].value,D=R.members?R.members.get(F):null;if(!D||D.kind!=c.ElementKind.FIELD)return e.error(i.DiagnosticCode.Type_0_has_no_property_1,n[0].range,R.internalName,F),T.createUnreachable();x=D.memoryOffset}else x=R.currentMemoryOffset;return e.options.isWasm64?p.is(4)&&p.size<=32?(e.currentType=s.Type.u32,T.createI32(x)):T.createI64(x):p.is(4)&&64==p.size?(e.currentType=s.Type.u64,T.createI64(x)):T.createI32(x);case"select":if(3!=n.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"3",n.length.toString(10)),T.createUnreachable();if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,0)}else g=e.compileExpressionRetainType(n[0],s.Type.i32,0);I=e.currentType;switch(y=e.compileExpression(n[1],I,1,0),E=e.makeIsTrueish(e.compileExpressionRetainType(n[2],s.Type.bool,0),e.currentType),e.currentType=I,e.currentType.kind){case 0:case 1:case 5:case 6:case 10:default:f=T.createSelect(g,y,E);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=T.createUnreachable()}return f;case"unreachable":return 0!=n.length&&e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"0",n.length.toString(10)),r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),T.createUnreachable();case"memory.size":return e.currentType=s.Type.i32,0!=n.length&&e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"0",n.length.toString(10)),r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),T.createHost(o.HostOp.CurrentMemory);case"memory.grow":return e.currentType=s.Type.i32,1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"0",n.length.toString(10)),g=T.createUnreachable()):g=e.compileExpression(n[0],s.Type.i32,1,0),r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),T.createHost(o.HostOp.GrowMemory,null,[g]);case"memory.copy":if(r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),3!=n.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"3",n.length.toString(10)),e.currentType=s.Type.void,T.createUnreachable();throw g=e.compileExpression(n[0],e.options.usizeType,1,0),y=e.compileExpression(n[1],e.options.usizeType,1,0),E=e.compileExpression(n[2],e.options.usizeType,1,0),e.currentType=s.Type.void,new Error("not implemented");case"memory.fill":if(r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),3!=n.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"3",n.length.toString(10)),e.currentType=s.Type.void,T.createUnreachable();throw g=e.compileExpression(n[0],e.options.usizeType,1,0),y=e.compileExpression(n[1],s.Type.u32,1,0),E=e.compileExpression(n[2],e.options.usizeType,1,0),e.currentType=s.Type.void,new Error("not implemented");case"changetype":return r&&1==r.length?1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=r[0],T.createUnreachable()):(g=e.compileExpressionRetainType(n[0],r[0],0),e.currentType=r[0],e.currentType.size!=r[0].size?(e.error(i.DiagnosticCode.Operation_not_supported,u.range),T.createUnreachable()):g):(r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r?r.length.toString(10):"0"),T.createUnreachable());case"assert":if(n.length<1||n.length>2)return r&&(r.length&&(e.currentType=r[0].nonNullableType),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),n.length<1?e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,u.range,"1",n.length.toString(10)):n.length>2&&e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"2",n.length.toString(10)),T.createUnreachable();if(r){if(r.length&&(e.currentType=r[0].nonNullableType),1!=r.length)return e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();g=e.compileExpression(n[0],r[0],1,1)}else g=e.compileExpressionRetainType(n[0],s.Type.bool,1);I=e.currentType;if(e.currentType=I.nonNullableType,e.options.noAssert)return p==s.Type.void?(e.currentType=s.Type.void,T.createNop()):g;var B=m(e,2==n.length?n[1]:null,u);if(e.currentType=I.nonNullableType,p==s.Type.void){switch(e.currentType.kind){default:f=T.createIf(T.createUnary(o.UnaryOp.EqzI32,g),B);break;case 3:case 8:f=T.createIf(T.createUnary(o.UnaryOp.EqzI64,g),B);break;case 4:case 9:f=T.createIf(T.createUnary(e.options.isWasm64?o.UnaryOp.EqzI64:o.UnaryOp.EqzI32,g),B);break;case 11:f=T.createIf(T.createBinary(o.BinaryOp.EqF32,g,T.createF32(0)),B);break;case 12:f=T.createIf(T.createBinary(o.BinaryOp.EqF64,g,T.createF64(0)),B);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=B}e.currentType=s.Type.void}else switch(e.currentType.kind){case 0:case 1:case 5:case 6:case 10:O=e.currentFunction.flow,N=e.currentFunction.getAndFreeTempLocal(e.currentType,!O.canOverflow(g,e.currentType));f=T.createIf(T.createTeeLocal(N.index,g),T.createGetLocal(N.index,1),B);break;case 2:case 7:default:N=e.currentFunction.getAndFreeTempLocal(s.Type.i32,!1);f=T.createIf(T.createTeeLocal(N.index,g),T.createGetLocal(N.index,1),B);break;case 3:case 8:N=e.currentFunction.getAndFreeTempLocal(s.Type.i64,!1);f=T.createIf(T.createUnary(o.UnaryOp.EqzI64,T.createTeeLocal(N.index,g)),B,T.createGetLocal(N.index,2));break;case 4:case 9:N=e.currentFunction.getAndFreeTempLocal(e.options.usizeType,!1);f=T.createIf(T.createUnary(e.options.isWasm64?o.UnaryOp.EqzI64:o.UnaryOp.EqzI32,T.createTeeLocal(N.index,g)),B,T.createGetLocal(N.index,e.options.nativeSizeType));break;case 11:N=e.currentFunction.getAndFreeTempLocal(s.Type.f32,!1);f=T.createIf(T.createBinary(o.BinaryOp.EqF32,T.createTeeLocal(N.index,g),T.createF32(0)),B,T.createGetLocal(N.index,3));break;case 12:N=e.currentFunction.getAndFreeTempLocal(s.Type.f64,!1);f=T.createIf(T.createBinary(o.BinaryOp.EqF64,T.createTeeLocal(N.index,g),T.createF64(0)),B,T.createGetLocal(N.index,4));break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,u.range),f=B}return f;case"unchecked":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable()):((O=e.currentFunction.flow).set(4096),f=e.compileExpressionRetainType(n[0],p,0),O.unset(4096),f);case"call_indirect":if(n.length<1)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),T.createUnreachable();var U=void 0;if(r){if(1!=r.length)return r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,u.range,"1",r.length.toString(10)),T.createUnreachable();U=r[0]}else U=p;if(g=e.compileExpressionRetainType(n[0],s.Type.u32,0),7!=e.currentType.kind)return e.error(i.DiagnosticCode.Operation_not_supported,n[0].range),T.createUnreachable();for(var P=n.length-1,w=new Array(P),M=new Array(P+1),G=U.toNativeType(),K=new Array(P),z=0;z<P;++z){w[z]=e.compileExpressionRetainType(n[1+z],s.Type.i32,0);var H=e.currentType;M[z]=H.toSignatureString(),K[z]=H.toNativeType()}M[P]=U.toSignatureString();var V=M.join(""),X=T.getFunctionTypeBySignature(G,K);return X||(X=T.addFunctionType(V,G,K)),e.currentType=U,T.createCallIndirect(g,w,V);case"ERROR":return e.error(i.DiagnosticCode.User_defined_0,u.range,(n.length?n[0]:u).range.toString()),T.createUnreachable();case"WARNING":return e.warning(i.DiagnosticCode.User_defined_0,u.range,(n.length?n[0]:u).range.toString()),T.createNop();case"INFO":return e.info(i.DiagnosticCode.User_defined_0,u.range,(n.length?n[0]:u).range.toString()),T.createNop();case"i8":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.i8,T.createUnreachable()):e.compileExpression(n[0],s.Type.i8,2,0);case"i16":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.i16,T.createUnreachable()):e.compileExpression(n[0],s.Type.i16,2,0);case"i32":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.i32,T.createUnreachable()):e.compileExpression(n[0],s.Type.i32,2,0);case"i64":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.i64,T.createUnreachable()):e.compileExpression(n[0],s.Type.i64,2,0);case"isize":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=e.options.isWasm64?s.Type.isize64:s.Type.isize32,T.createUnreachable()):e.compileExpression(n[0],e.options.isWasm64?s.Type.isize64:s.Type.isize32,2,0);case"u8":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.u8,T.createUnreachable()):e.compileExpression(n[0],s.Type.u8,2,0);case"u16":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.u16,T.createUnreachable()):e.compileExpression(n[0],s.Type.u16,2,0);case"u32":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.u32,T.createUnreachable()):e.compileExpression(n[0],s.Type.u32,2,0);case"u64":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.u64,T.createUnreachable()):e.compileExpression(n[0],s.Type.u64,2,0);case"usize":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=e.options.usizeType,T.createUnreachable()):e.compileExpression(n[0],e.options.usizeType,2,0);case"bool":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.bool,T.createUnreachable()):e.compileExpression(n[0],s.Type.bool,2,0);case"f32":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.f32,T.createUnreachable()):e.compileExpression(n[0],s.Type.f32,2,0);case"f64":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.f64,T.createUnreachable()):e.compileExpression(n[0],s.Type.f64,2,0);case"iterateRoots":if(r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),1!=n.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,u.range,"1",n.length.toString(10)),e.currentType=s.Type.void,T.createUnreachable();var W=e.compileExpressionRetainType(n[0],s.Type.u32,0),Y=(I=e.currentType).signatureReference;return e.currentType=s.Type.void,I.is(256)&&Y&&1==Y.parameterTypes.length&&Y.parameterTypes[0]==e.options.usizeType?(e.currentType=s.Type.void,e.needsIterateRoots=!0,T.createCall("~iterateRoots",[W],0)):(e.error(i.DiagnosticCode.Type_0_is_not_assignable_to_type_1,u.range,I.toString(),"(ref: usize) => void"),T.createUnreachable())}var Q=function(e,t,r,n,i){switch(t.internalName){case"i32.clz":return h("clz",e,s.Type.i32,r,s.Type.i32,i);case"i64.clz":return h("clz",e,s.Type.i64,r,s.Type.i64,i);case"i32.ctz":return h("ctz",e,s.Type.i32,r,s.Type.i32,i);case"i64.ctz":return h("ctz",e,s.Type.i64,r,s.Type.i64,i);case"i32.popcnt":return h("popcnt",e,s.Type.i32,r,s.Type.i32,i);case"i64.popcnt":return h("popcnt",e,s.Type.i64,r,s.Type.i64,i);case"i32.rotl":return h("rotl",e,s.Type.i32,r,s.Type.i32,i);case"i64.rotl":return h("rotl",e,s.Type.i64,r,s.Type.i64,i);case"i32.rotr":return h("rotr",e,s.Type.i32,r,s.Type.i32,i);case"i64.rotr":return h("rotr",e,s.Type.i64,r,s.Type.i64,i);case"f32.abs":return h("abs",e,s.Type.f32,r,s.Type.f32,i);case"f64.abs":return h("abs",e,s.Type.f64,r,s.Type.f64,i);case"f32.max":return h("max",e,s.Type.f32,r,s.Type.f32,i);case"f64.max":return h("max",e,s.Type.f64,r,s.Type.f64,i);case"f32.min":return h("min",e,s.Type.f32,r,s.Type.f32,i);case"f64.min":return h("min",e,s.Type.f64,r,s.Type.f64,i);case"f32.ceil":return h("ceil",e,s.Type.f32,r,s.Type.f32,i);case"f64.ceil":return h("ceil",e,s.Type.f64,r,s.Type.f64,i);case"f32.floor":return h("floor",e,s.Type.f32,r,s.Type.f32,i);case"f64.floor":return h("floor",e,s.Type.f64,r,s.Type.f64,i);case"f32.copysign":return h("copysign",e,s.Type.f32,r,s.Type.f32,i);case"f64.copysign":return h("copysign",e,s.Type.f64,r,s.Type.f64,i);case"f32.nearest":return h("nearest",e,s.Type.f32,r,s.Type.f32,i);case"f64.nearest":return h("nearest",e,s.Type.f64,r,s.Type.f64,i);case"i32.reinterpret_f32":return h("reinterpret",e,s.Type.i32,r,s.Type.f32,i);case"i64.reinterpret_f64":return h("reinterpret",e,s.Type.i64,r,s.Type.f64,i);case"f32.reinterpret_i32":return h("reinterpret",e,s.Type.f32,r,s.Type.i32,i);case"f64.reinterpret_i64":return h("reinterpret",e,s.Type.f64,r,s.Type.i64,i);case"f32.sqrt":return h("sqrt",e,s.Type.f32,r,s.Type.f32,i);case"f64.sqrt":return h("sqrt",e,s.Type.f64,r,s.Type.f64,i);case"f32.trunc":return h("trunc",e,s.Type.f32,r,s.Type.f32,i);case"f64.trunc":return h("trunc",e,s.Type.f64,r,s.Type.f64,i);case"i32.load8_s":return h("load",e,s.Type.i8,r,s.Type.i32,i);case"i32.load8_u":return h("load",e,s.Type.u8,r,s.Type.u32,i);case"i32.load16_s":return h("load",e,s.Type.i16,r,s.Type.i32,i);case"i32.load16_u":return h("load",e,s.Type.u16,r,s.Type.u32,i);case"i32.load":return h("load",e,s.Type.i32,r,s.Type.i32,i);case"i64.load8_s":return h("load",e,s.Type.i8,r,s.Type.i64,i);case"i64.load8_u":return h("load",e,s.Type.u8,r,s.Type.u64,i);case"i64.load16_s":return h("load",e,s.Type.i16,r,s.Type.i64,i);case"i64.load16_u":return h("load",e,s.Type.u16,r,s.Type.u64,i);case"i64.load32_s":return h("load",e,s.Type.i32,r,s.Type.i64,i);case"i64.load32_u":return h("load",e,s.Type.u32,r,s.Type.u64,i);case"i64.load":return h("load",e,s.Type.i64,r,s.Type.i64,i);case"f32.load":return h("load",e,s.Type.f32,r,s.Type.f32,i);case"f64.load":return h("load",e,s.Type.f64,r,s.Type.f64,i);case"i32.store8":return h("store",e,s.Type.i8,r,s.Type.i32,i);case"i32.store16":return h("store",e,s.Type.i16,r,s.Type.i32,i);case"i32.store":return h("store",e,s.Type.i32,r,s.Type.i32,i);case"i64.store8":return h("store",e,s.Type.i8,r,s.Type.i64,i);case"i64.store16":return h("store",e,s.Type.i16,r,s.Type.i64,i);case"i64.store32":return h("store",e,s.Type.i32,r,s.Type.i64,i);case"i64.store":return h("store",e,s.Type.i64,r,s.Type.i64,i);case"f32.store":return h("store",e,s.Type.f32,r,s.Type.f32,i);case"f64.store":return h("store",e,s.Type.f64,r,s.Type.f64,i)}return 0}(e,t,n,0,u);return Q?(r&&r.length&&e.error(i.DiagnosticCode.Type_0_is_not_generic,u.range,t.internalName),Q):(e.error(i.DiagnosticCode.Operation_not_supported,u.range),T.createUnreachable())}function h(e,t,r,n,i,a){var s=assert(t.program.elementsLookup.get(e));return assert(s.kind==c.ElementKind.FUNCTION_PROTOTYPE),u(t,s,[r],n,i,a)}function d(e,t,r,n){if(0==r.length)return t&&1==t.length?t[0]:(e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,n.range,"1",t?t.length.toString(10):"0"),null);if(1==r.length){if(t)if(1==t.length)e.compileExpression(r[0],t[0],1,0);else{if(t.length)return e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,n.range,"1",t.length.toString(10)),null;e.compileExpressionRetainType(r[0],s.Type.i32,0)}else e.compileExpressionRetainType(r[0],s.Type.i32,0);return e.currentType}return t&&t.length>1&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,n.range,"1",t.length.toString(10)),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,n.range,"1",r.length.toString(10)),null}function _(e,t){var r,n;return e.options.isWasm64?(r=e.precomputeExpression(t,s.Type.usize64,1,0),(o.getExpressionId(r)!=o.ExpressionId.Const||2!=o.getExpressionType(r)||0!=o.getConstValueI64High(r)||(n=o.getConstValueI64Low(r))<0)&&(e.error(i.DiagnosticCode.Operation_not_supported,t.range),n=-1)):(r=e.precomputeExpression(t,s.Type.usize32,1,0),(o.getExpressionId(r)!=o.ExpressionId.Const||1!=o.getExpressionType(r)||(n=o.getConstValueI32(r))<0)&&(e.error(i.DiagnosticCode.Operation_not_supported,t.range),n=-1)),n}function m(e,t,r){var n=e.program,i=e.module,a=n.typesLookup.get("string");if(!a)return i.createUnreachable();var o=n.abortInstance;if(!o||!e.compileFunction(o))return i.createUnreachable();var c=null!=t?e.compileExpression(t,a,1,0):a.toNativeZero(i),l=e.ensureStaticString(r.range.source.normalizedPath);return e.currentType=s.Type.void,i.createBlock(null,[i.createCallImport(o.internalName,[c,l,i.createI32(r.range.line),i.createI32(r.range.column)],0),i.createUnreachable()])}function g(e,t){var r,i,a=e.program;assert(t.type.isManaged(a));var l=t.gcHookIndex;if(-1!=l)return l;var u=t.members;if(t.prototype.declaration.range.source.isLibrary&&null!==u&&u.has("__gc")){var h=assert(u.get("__gc"));assert(h.kind==c.ElementKind.FUNCTION_PROTOTYPE);var d=assert(a.resolver.resolveFunction(h,null));assert(d.is(p.CommonFlags.PRIVATE|p.CommonFlags.INSTANCE)),assert(!d.isAny(p.CommonFlags.AMBIENT|p.CommonFlags.VIRTUAL)),assert(0==d.signature.parameterTypes.length),assert(d.signature.returnType==s.Type.void),d.internalName=t.internalName+"~gc",assert(e.compileFunction(d));var _=e.ensureFunctionTableEntry(d);return t.gcHookIndex=_,_}var m=e.module,y=e.options,E=y.nativeSizeType,f=y.usizeType.byteSize,T=new Array;T.push(m.createIf(m.createUnary(y.isWasm64?o.UnaryOp.EqzI64:o.UnaryOp.EqzI32,m.createGetLocal(0,E)),m.createReturn()));var I=e.functionTable,v=I.length;I.push(0),t.gcHookIndex=v;var A=t.base;if(A?(assert(A.type.isManaged(a)),T.push(m.createCallIndirect(m.createI32(g(e,A.type.classReference)),[m.createGetLocal(0,E)],2==E?"Iv":"iv"))):T.push(m.createCall(assert(a.gcMarkInstance).internalName,[m.createGetLocal(0,E)],0)),u)try{for(var C=n(u.values()),N=C.next();!N.done;N=C.next()){var O=N.value;if(O.kind==c.ElementKind.FIELD)if(O.parent===t)if(O.type.isManaged(a)){var S=O.memoryOffset;assert(S>=0),T.push(m.createCall(assert(a.gcMarkInstance).internalName,[m.createLoad(f,!1,m.createGetLocal(0,E),E,S)],0))}}}catch(e){r={error:e}}finally{try{N&&!N.done&&(i=C.return)&&i.call(C)}finally{if(r)throw r.error}}return I[v]=m.addFunction(t.internalName+"~gc",e.ensureFunctionType(null,s.Type.void,y.usizeType),null,m.createBlock(null,T)),v}t.compileCall=u,t.compileAllocate=function(e,t,r){var n=e.program;assert(t.program==n);var a=e.module,s=e.options;if(n.hasGC&&t.type.isManaged(n)){var o=assert(n.gcAllocateInstance);return e.compileFunction(o)?(e.currentType=t.type,a.createCall(o.internalName,[s.isWasm64?a.createI64(t.currentMemoryOffset):a.createI32(t.currentMemoryOffset),a.createI32(g(e,t))],s.nativeSizeType)):a.createUnreachable()}return(o=n.memoryAllocateInstance)?e.compileFunction(o)?(e.currentType=t.type,a.createCall(o.internalName,[s.isWasm64?a.createI64(t.currentMemoryOffset):a.createI32(t.currentMemoryOffset)],s.nativeSizeType)):a.createUnreachable():(n.error(i.DiagnosticCode.Cannot_find_name_0,r.range,"memory.allocate"),a.createUnreachable())},t.compileAbort=m,t.compileIterateRoots=function(e){var t,r,i=e.module,a=new Array;try{for(var o=n(e.program.elementsLookup.values()),l=o.next();!l.done;l=o.next()){var u=l.value;if(u.kind==c.ElementKind.GLOBAL){var h=u,d=h.type.classReference;if(h.is(p.CommonFlags.COMPILED)&&null!==d&&!d.hasDecorator(c.DecoratorFlags.UNMANAGED))if(h.is(p.CommonFlags.INLINED)){var _=h.constantIntegerValue;a.push(i.createCallIndirect(i.createGetLocal(0,1),[e.options.isWasm64?i.createI64(i64_low(_),i64_high(_)):i.createI32(i64_low(_))],"iv"))}else a.push(i.createCallIndirect(i.createGetLocal(0,1),[i.createGetGlobal(h.internalName,e.options.nativeSizeType)],"iv"))}}}catch(e){t={error:e}}finally{try{l&&!l.done&&(r=o.return)&&r.call(o)}finally{if(t)throw t.error}}var m=e.ensureFunctionType([s.Type.i32],s.Type.void);i.addFunction("~iterateRoots",m,[],a.length?i.createBlock(null,a):i.createNop())},t.ensureGCHook=g},function(e,t,r){"use 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empty");return this.backlog=[],this.seenlog.clear(),this.donelog.clear(),this.program},t.prototype.parseType=function(e,t,r){void 0===t&&(t=!0),void 0===r&&(r=!1);var n,i=e.next(),a=e.tokenPos;if(i==s.Token.OPENPAREN){var c=e.skip(s.Token.OPENPAREN),p=this.tryParseSignature(e);if(p){if(c){if(!e.skip(s.Token.CLOSEPAREN))return this.error(o.DiagnosticCode._0_expected,e.range(),")"),null;if(!e.skip(s.Token.BAR))return this.error(o.DiagnosticCode._0_expected,e.range(),"|"),null;e.skip(s.Token.NULL)||this.error(o.DiagnosticCode._0_expected,e.range(),"null"),p.isNullable=!0}return p}if(c||this.tryParseSignatureIsSignature)return this.error(o.DiagnosticCode.Unexpected_token,e.range()),null;if(!t)return this.error(o.DiagnosticCode.Unexpected_token,e.range()),null;var u=this.parseType(e,!1,r);if(!u)return null;if(!e.skip(s.Token.CLOSEPAREN))return r||this.error(o.DiagnosticCode._0_expected,e.range(e.pos),"}"),null;(n=u).range.start=a,n.range.end=e.pos}else if(i==s.Token.VOID)n=l.Node.createType(l.Node.createIdentifierExpression("void",e.range()),[],!1,e.range(a,e.pos));else if(i==s.Token.THIS)n=l.Node.createType(l.Node.createThisExpression(e.range()),[],!1,e.range(a,e.pos));else if(i==s.Token.TRUE||i==s.Token.FALSE)n=l.Node.createType(l.Node.createIdentifierExpression("bool",e.range()),[],!1,e.range(a,e.pos));else if(i==s.Token.STRINGLITERAL)e.readString(),n=l.Node.createType(l.Node.createIdentifierExpression("string",e.range()),[],!1,e.range(a,e.pos));else{if(i!=s.Token.IDENTIFIER)return r||this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;var h=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),d=new Array,_=!1;if(e.skip(s.Token.LESSTHAN)){do{var m=this.parseType(e,!0,r);if(!m)return null;d.push(m)}while(e.skip(s.Token.COMMA));if(!e.skip(s.Token.GREATERTHAN))return r||this.error(o.DiagnosticCode._0_expected,e.range(e.pos),">"),null}if(e.skip(s.Token.BAR)){if(!e.skip(s.Token.NULL))return r||this.error(o.DiagnosticCode._0_expected,e.range(e.pos),"null"),null;_=!0}n=l.Node.createType(h,d,_,e.range(a,e.pos))}for(;e.skip(s.Token.OPENBRACKET);){var g=e.tokenPos;if(!e.skip(s.Token.CLOSEBRACKET))return r||this.error(o.DiagnosticCode._0_expected,e.range(),"]"),null;var y=e.range(g,e.pos);_=!1;if(e.skip(s.Token.BAR)){if(!e.skip(s.Token.NULL))return r||this.error(o.DiagnosticCode._0_expected,e.range(),"null"),null;_=!0}if(n=l.Node.createType(l.Node.createIdentifierExpression("Array",y),[n],_,e.range(a,e.pos)),_)break}return n},t.prototype.tryParseSignature=function(e){var t,r=e.mark(),n=e.tokenPos,i=null,a=null,c=!1;if(e.skip(s.Token.CLOSEPAREN))c=!0,e.discard(r),i=[];else{c=!1;do{var p=l.ParameterKind.DEFAULT;if(e.skip(s.Token.DOT_DOT_DOT)&&(c=!0,e.discard(r),p=l.ParameterKind.REST),e.skip(s.Token.THIS)){if(!e.skip(s.Token.COLON))return e.reset(r),this.tryParseSignatureIsSignature=!1,null;c=!0,e.discard(r);var u=this.parseType(e,!1);if(!u)return null;if(u.kind!=l.NodeKind.TYPE)return this.error(o.DiagnosticCode.Operation_not_supported,u.range),this.tryParseSignatureIsSignature=!0,null;a=u}else{if(!e.skipIdentifier())return c?this.error(o.DiagnosticCode.Identifier_expected,e.range()):e.reset(r),this.tryParseSignatureIsSignature=c,null;var h=l.Node.createIdentifierExpression(e.readIdentifier(),e.range(e.tokenPos,e.pos));if(e.skip(s.Token.QUESTION)&&(c=!0,e.discard(r),p==l.ParameterKind.REST?this.error(o.DiagnosticCode.A_rest_parameter_cannot_be_optional,e.range()):p=l.ParameterKind.OPTIONAL),e.skip(s.Token.COLON)){c=!0,e.discard(r);var d=this.parseType(e);if(!d)return this.tryParseSignatureIsSignature=c,null;var _=new l.ParameterNode;_.parameterKind=p,_.name=h,_.type=d,i?i.push(_):i=[_]}else c&&this.error(o.DiagnosticCode.Type_expected,e.range())}}while(e.skip(s.Token.COMMA));if(!e.skip(s.Token.CLOSEPAREN))return c?this.error(o.DiagnosticCode._0_expected,e.range(),")"):e.reset(r),this.tryParseSignatureIsSignature=c,null}return e.skip(s.Token.EQUALS_GREATERTHAN)?(c=!0,e.discard(r),(t=this.parseType(e))?(this.tryParseSignatureIsSignature=!0,l.Node.createSignature(i||[],t,a,!1,e.range(n,e.pos))):(this.tryParseSignatureIsSignature=c,null)):(c?this.error(o.DiagnosticCode._0_expected,e.range(),"=>"):e.reset(r),this.tryParseSignatureIsSignature=c,null)},t.prototype.parseDecorator=function(e){var t=e.tokenPos;if(e.skipIdentifier()){for(var r=e.readIdentifier(),n=l.Node.createIdentifierExpression(r,e.range(t,e.pos));e.skip(s.Token.DOT);){if(!e.skipIdentifier())return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;r=e.readIdentifier(),n=l.Node.createPropertyAccessExpression(n,l.Node.createIdentifierExpression(r,e.range()),e.range(t,e.pos))}var i=void 0;if(!e.skip(s.Token.OPENPAREN))return l.Node.createDecorator(n,null,e.range(t,e.pos));if(i=this.parseArguments(e))return l.Node.createDecorator(n,i,e.range(t,e.pos))}else this.error(o.DiagnosticCode.Identifier_expected,e.range());return null},t.prototype.parseVariable=function(e,t,r,n){var i=new Array;do{var a=this.parseVariableDeclaration(e,t,r);if(!a)return null;i.push(a)}while(e.skip(s.Token.COMMA));var o=l.Node.createVariableStatement(i,r,t,e.range(n,e.pos));return e.skip(s.Token.SEMICOLON),o},t.prototype.parseVariableDeclaration=function(e,t,r){if(!e.skipIdentifier())return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;var n=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),a=t,c=null;e.skip(s.Token.COLON)&&(c=this.parseType(e));var p=null;if(e.skip(s.Token.EQUALS)){if(a&i.CommonFlags.AMBIENT&&this.error(o.DiagnosticCode.Initializers_are_not_allowed_in_ambient_contexts,e.range()),!(p=this.parseExpression(e,2)))return null}else a&i.CommonFlags.CONST?a&i.CommonFlags.AMBIENT||this.error(o.DiagnosticCode._const_declarations_must_be_initialized,n.range):c||this.error(o.DiagnosticCode.Type_expected,e.range(e.pos));return l.Node.createVariableDeclaration(n,c,p,r,a,s.Range.join(n.range,e.range()))},t.prototype.parseEnum=function(e,t,r,n){if(e.next()!=s.Token.IDENTIFIER)return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;var a=l.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.next()!=s.Token.OPENBRACE)return this.error(o.DiagnosticCode._0_expected,e.range(),"{"),null;for(var c=new Array;!e.skip(s.Token.CLOSEBRACE);){var p=this.parseEnumValue(e,i.CommonFlags.NONE);if(!p)return null;if(c.push(p),!e.skip(s.Token.COMMA)){if(e.skip(s.Token.CLOSEBRACE))break;return this.error(o.DiagnosticCode._0_expected,e.range(),"}"),null}}var u=l.Node.createEnumDeclaration(a,c,r,t,e.range(n,e.pos));return e.skip(s.Token.SEMICOLON),u},t.prototype.parseEnumValue=function(e,t){if(!e.skipIdentifier())return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;var r=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),n=null;return e.skip(s.Token.EQUALS)&&!(n=this.parseExpression(e,2))?null:l.Node.createEnumValueDeclaration(r,n,t,s.Range.join(r.range,e.range()))},t.prototype.parseReturn=function(e){var t=null;if(e.peek(!0)!=s.Token.SEMICOLON&&e.nextToken!=s.Token.CLOSEBRACE&&!e.nextTokenOnNewLine&&!(t=this.parseExpression(e)))return null;var r=l.Node.createReturnStatement(t,e.range());return e.skip(s.Token.SEMICOLON),r},t.prototype.parseTypeParameters=function(e){for(var t=new Array;!e.skip(s.Token.GREATERTHAN);){var r=this.parseTypeParameter(e);if(!r)return null;if(t.push(r),!e.skip(s.Token.COMMA)){if(e.skip(s.Token.GREATERTHAN))break;return this.error(o.DiagnosticCode._0_expected,e.range(),">"),null}}return 0===t.length&&this.error(o.DiagnosticCode.Type_parameter_list_cannot_be_empty,e.range()),t},t.prototype.parseTypeParameter=function(e){if(e.next()==s.Token.IDENTIFIER){var t=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),r=null;if(e.skip(s.Token.EXTENDS)){var n=this.parseType(e);if(!n)return null;if(n.kind!=l.NodeKind.TYPE)return this.error(o.DiagnosticCode.Operation_not_supported,n.range),null;r=n}return l.Node.createTypeParameter(t,r,s.Range.join(t.range,e.range()))}return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseParameters=function(e,t){void 0===t&&(t=!1);var r=new Array,n=null,i=!1,a=!1,c=null;if(this.parseParametersThis=null,e.skip(s.Token.THIS)){if(!e.skip(s.Token.COLON))return this.error(o.DiagnosticCode._0_expected,e.range(),":"),null;if(!(c=this.parseType(e)))return null;if(c.kind==l.NodeKind.TYPE?this.parseParametersThis=c:this.error(o.DiagnosticCode.Operation_not_supported,c.range),!e.skip(s.Token.COMMA))return e.skip(s.Token.CLOSEPAREN)?r:(this.error(o.DiagnosticCode._0_expected,e.range(),")"),null)}for(;!e.skip(s.Token.CLOSEPAREN);){var p=this.parseParameter(e,t);if(!p)return null;switch(n&&!a&&(this.error(o.DiagnosticCode.A_rest_parameter_must_be_last_in_a_parameter_list,n.name.range),a=!0),p.parameterKind){default:i&&this.error(o.DiagnosticCode.A_required_parameter_cannot_follow_an_optional_parameter,p.name.range);break;case l.ParameterKind.OPTIONAL:i=!0;break;case l.ParameterKind.REST:n=p}if(r.push(p),!e.skip(s.Token.COMMA)){if(e.skip(s.Token.CLOSEPAREN))break;return this.error(o.DiagnosticCode._0_expected,e.range(),")"),null}}return r},t.prototype.parseParameter=function(e,t){void 0===t&&(t=!1);var r=!1,n=!1,a=null,c=i.CommonFlags.NONE;if(t&&(e.skip(s.Token.PUBLIC)?(a=e.range(),c|=i.CommonFlags.PUBLIC):e.skip(s.Token.PROTECTED)?(a=e.range(),c|=i.CommonFlags.PROTECTED):e.skip(s.Token.PRIVATE)&&(a=e.range(),c|=i.CommonFlags.PRIVATE),e.peek()==s.Token.READONLY)){var p=e.mark();e.next(),e.peek()!=s.Token.COLON?(e.discard(p),a||(a=e.range()),c|=i.CommonFlags.READONLY):e.reset(p)}if(e.skip(s.Token.DOT_DOT_DOT)&&(c?this.error(o.DiagnosticCode.A_parameter_property_cannot_be_declared_using_a_rest_parameter,e.range()):a=e.range(),r=!0),e.skipIdentifier()){r||(a=e.range());var u=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),h=null;if((n=e.skip(s.Token.QUESTION))&&r&&this.error(o.DiagnosticCode.A_rest_parameter_cannot_be_optional,u.range),e.skip(s.Token.COLON)){if(!(h=this.parseType(e)))return null}else h=l.Node.createOmittedType(e.range(e.pos));var d=null;if(e.skip(s.Token.EQUALS)&&(r&&this.error(o.DiagnosticCode.A_rest_parameter_cannot_have_an_initializer,u.range),n?this.error(o.DiagnosticCode.Parameter_cannot_have_question_mark_and_initializer,u.range):n=!0,!(d=this.parseExpression(e,2))))return null;var _=l.Node.createParameter(u,h,d,r?l.ParameterKind.REST:n?l.ParameterKind.OPTIONAL:l.ParameterKind.DEFAULT,s.Range.join(a,e.range()));return _.flags|=c,_}return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseFunction=function(e,t,r,n){if(!e.skipIdentifier())return this.error(o.DiagnosticCode.Identifier_expected,e.range(e.pos)),null;var a=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),c=-1,p=null;if(e.skip(s.Token.LESSTHAN)){if(c=e.tokenPos,!(p=this.parseTypeParameters(e)))return null;t|=i.CommonFlags.GENERIC}if(!e.skip(s.Token.OPENPAREN))return this.error(o.DiagnosticCode._0_expected,e.range(e.pos),"("),null;c<0&&(c=e.tokenPos);var u=this.parseParameters(e);if(!u)return null;var h=this.parseParametersThis,d=0!=(t&i.CommonFlags.SET);d&&(1!=u.length&&this.error(o.DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,a.range),u.length&&u[0].initializer&&this.error(o.DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,a.range)),t&i.CommonFlags.GET&&u.length&&this.error(o.DiagnosticCode.A_get_accessor_cannot_have_parameters,a.range);var _=null;if(e.skip(s.Token.COLON)&&!(_=this.parseType(e,!0,d)))return null;_||(_=l.Node.createOmittedType(e.range(e.pos)),d||this.error(o.DiagnosticCode.Type_expected,_.range));var m=l.Node.createSignature(u,_,h,!1,e.range(c,e.pos)),g=null;if(e.skip(s.Token.OPENBRACE)){if(t&i.CommonFlags.AMBIENT&&this.error(o.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,e.range()),!(g=this.parseBlockStatement(e,!1)))return null}else t&i.CommonFlags.AMBIENT||this.error(o.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,e.range(e.pos));var y=l.Node.createFunctionDeclaration(a,p,m,g,r,t,e.range(n,e.pos));return e.skip(s.Token.SEMICOLON),y},t.prototype.parseFunctionExpression=function(e){var t,r=e.tokenPos,n=!1;if(e.token==s.Token.FUNCTION){if(t=e.skipIdentifier()?l.Node.createIdentifierExpression(e.readIdentifier(),e.range()):l.Node.createEmptyIdentifierExpression(e.range(e.pos)),!e.skip(s.Token.OPENPAREN))return this.error(o.DiagnosticCode._0_expected,e.range(e.pos),"("),null}else n=!0,assert(e.token==s.Token.OPENPAREN),t=l.Node.createEmptyIdentifierExpression(e.range(e.tokenPos));var i=e.pos,a=this.parseParameters(e);return a?this.parseFunctionExpressionCommon(e,t,a,n,r,i):null},t.prototype.parseFunctionExpressionCommon=function(e,t,r,n,a,c){void 0===a&&(a=-1),void 0===c&&(c=-1),a<0&&(a=t.range.start),c<0&&(c=a);var p=null;if(e.skip(s.Token.COLON)){if(!(p=this.parseType(e)))return null}else p=l.Node.createOmittedType(e.range(e.pos)),this.error(o.DiagnosticCode.Type_expected,p.range);if(n&&!e.skip(s.Token.EQUALS_GREATERTHAN))return this.error(o.DiagnosticCode._0_expected,e.range(e.pos),"=>"),null;var u,h=l.Node.createSignature(r,p,null,!1,e.range(c,e.pos));if(n)u=this.parseStatement(e,!1);else{if(!e.skip(s.Token.OPENBRACE))return this.error(o.DiagnosticCode._0_expected,e.range(e.pos),"{"),null;u=this.parseBlockStatement(e,!1)}if(!u)return null;var d=l.Node.createFunctionDeclaration(t,null,h,u,null,n?i.CommonFlags.ARROW:i.CommonFlags.NONE,e.range(a,e.pos));return l.Node.createFunctionExpression(d)},t.prototype.parseClassOrInterface=function(e,t,r,n){var a=e.token==s.Token.INTERFACE;if(!e.skipIdentifier())return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;var c,p=l.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.skip(s.Token.LESSTHAN)){if(!(c=this.parseTypeParameters(e)))return null;t|=i.CommonFlags.GENERIC}else c=[];var u=null;if(e.skip(s.Token.EXTENDS)){var h=this.parseType(e);if(!h)return null;if(h.kind!=l.NodeKind.TYPE)return this.error(o.DiagnosticCode.Operation_not_supported,h.range),null;u=h}var d=null;if(e.skip(s.Token.IMPLEMENTS)){a&&this.error(o.DiagnosticCode.Interface_declaration_cannot_have_implements_clause,e.range());do{var _=this.parseType(e);if(!_)return null;a||(d||(d=[]),d.push(_))}while(e.skip(s.Token.COMMA))}if(!e.skip(s.Token.OPENBRACE))return this.error(o.DiagnosticCode._0_expected,e.range(),"{"),null;var m,g=new Array;if(a?(assert(!d),m=l.Node.createInterfaceDeclaration(p,c,u,g,r,t,e.range(n,e.pos))):m=l.Node.createClassDeclaration(p,c,u,d,g,r,t,e.range(n,e.pos)),!e.skip(s.Token.CLOSEBRACE))do{var y=this.parseClassMember(e,m);if(!y)return null;y.parent=m,g.push(y)}while(!e.skip(s.Token.CLOSEBRACE));return m},t.prototype.parseClassExpression=function(e){var t,r=e.tokenPos;if(t=e.skipIdentifier()?l.Node.createIdentifierExpression(e.readIdentifier(),e.range()):l.Node.createEmptyIdentifierExpression(e.range(e.pos)),!e.skip(s.Token.OPENBRACE))return this.error(o.DiagnosticCode._0_expected,e.range(e.pos),"{"),null;var n=new Array,a=l.Node.createClassDeclaration(t,[],null,null,n,null,i.CommonFlags.NONE,e.range(r,e.pos));if(!e.skip(s.Token.CLOSEBRACE))do{var c=this.parseClassMember(e,a);if(!c)return null;c.parent=a,n.push(c)}while(!e.skip(s.Token.CLOSEBRACE));return l.Node.createClassExpression(a)},t.prototype.parseClassMember=function(e,t){for(var r=e.pos,n=t.kind==l.NodeKind.INTERFACEDECLARATION,a=new Array;e.skip(s.Token.AT);){var c=this.parseDecorator(e);if(!c)break;n&&this.error(o.DiagnosticCode.Decorators_are_not_valid_here,c.range),a.push(c)}var p=t.flags&i.CommonFlags.AMBIENT;n&&(p|=i.CommonFlags.VIRTUAL),e.skip(s.Token.PUBLIC)?(n&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(),"public"),p|=i.CommonFlags.PUBLIC):e.skip(s.Token.PRIVATE)?(n&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(),"private"),p|=i.CommonFlags.PRIVATE):e.skip(s.Token.PROTECTED)&&(n&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(),"protected"),p|=i.CommonFlags.PROTECTED);var u=0,h=0,d=0,_=0;e.skip(s.Token.STATIC)?(n&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(),"static"),p|=i.CommonFlags.STATIC,u=e.tokenPos,h=e.pos):(p|=i.CommonFlags.INSTANCE,e.skip(s.Token.ABSTRACT)&&(n&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(),"abstract"),p|=i.CommonFlags.ABSTRACT,d=e.tokenPos,_=e.pos),t.flags&i.CommonFlags.GENERIC&&(p|=i.CommonFlags.GENERIC_CONTEXT));var m=0,g=0;e.skip(s.Token.READONLY)&&(p|=i.CommonFlags.READONLY,m=e.tokenPos,g=e.pos);var y=e.mark(),E=!1,f=!1,T=!1,I=0,v=0;if(n||(e.skip(s.Token.GET)?e.peek(!0,s.IdentifierHandling.PREFER)!=s.Token.IDENTIFIER||e.nextTokenOnNewLine?e.reset(y):(p|=i.CommonFlags.GET,f=!0,I=e.tokenPos,v=e.pos,p&i.CommonFlags.READONLY&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(m,g),"readonly")):e.skip(s.Token.SET)?e.peek(!0,s.IdentifierHandling.PREFER)!=s.Token.IDENTIFIER||e.nextTokenOnNewLine?e.reset(y):(p|=i.CommonFlags.SET|i.CommonFlags.SET,T=!0,I=e.tokenPos,v=e.pos,p&i.CommonFlags.READONLY&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(m,g),"readonly")):e.skip(s.Token.CONSTRUCTOR)&&(E=!0,(p|=i.CommonFlags.CONSTRUCTOR)&i.CommonFlags.STATIC&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(u,h),"static"),p&i.CommonFlags.ABSTRACT&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(d,_),"abstract"),p&i.CommonFlags.READONLY&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(m,g),"readonly"))),!E&&!e.skipIdentifier())return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;var A=E?l.Node.createConstructorExpression(e.range()):l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),C=null;if(e.skip(s.Token.LESSTHAN)){var N=e.tokenPos;if(!(C=this.parseTypeParameters(e)))return null;E?this.error(o.DiagnosticCode.Type_parameters_cannot_appear_on_a_constructor_declaration,e.range(N,e.pos)):f||T?this.error(o.DiagnosticCode.An_accessor_cannot_have_type_parameters,e.range(N,e.pos)):p|=i.CommonFlags.GENERIC}if(e.skip(s.Token.OPENPAREN)){var O=e.tokenPos,S=this.parseParameters(e,E);if(!S)return null;var L=this.parseParametersThis;if(E)for(var b=0,k=S.length;b<k;++b){var R=S[b];if(R.isAny(i.CommonFlags.PUBLIC|i.CommonFlags.PROTECTED|i.CommonFlags.PRIVATE|i.CommonFlags.READONLY)){var x=l.Node.createFieldDeclaration(R.name,R.type,null,null,R.flags|i.CommonFlags.INSTANCE,R.range);x.parameterIndex=b,x.parent=t,R.implicitFieldDeclaration=x,t.members.push(x)}}else f?S.length&&this.error(o.DiagnosticCode.A_get_accessor_cannot_have_parameters,A.range):T&&(1!=S.length&&this.error(o.DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,A.range),S.length&&S[0].initializer&&this.error(o.DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,A.range));var F=null;if(e.skip(s.Token.COLON)){if(A.kind==l.NodeKind.CONSTRUCTOR?this.error(o.DiagnosticCode.Type_annotation_cannot_appear_on_a_constructor_declaration,e.range()):T&&this.error(o.DiagnosticCode.A_set_accessor_cannot_have_a_return_type_annotation,e.range()),!(F=this.parseType(e,A.kind==l.NodeKind.CONSTRUCTOR||T)))return null}else F=l.Node.createOmittedType(e.range(e.pos)),T||A.kind==l.NodeKind.CONSTRUCTOR||this.error(o.DiagnosticCode.Type_expected,F.range);var D=l.Node.createSignature(S,F,L,!1,e.range(O,e.pos)),B=null;if(e.skip(s.Token.OPENBRACE)){if(p&i.CommonFlags.AMBIENT?this.error(o.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,e.range()):p&i.CommonFlags.ABSTRACT&&this.error(o.DiagnosticCode.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract,e.range(),A.text),!(B=this.parseBlockStatement(e,!1)))return null}else p&i.CommonFlags.AMBIENT||n||this.error(o.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,e.range());var U=l.Node.createMethodDeclaration(A,C,D,B,a,p,e.range(r,e.pos));return e.skip(s.Token.SEMICOLON),U}if(E)this.error(o.DiagnosticCode.Constructor_implementation_is_missing,A.range);else{if(!f&&!T){p&i.CommonFlags.ABSTRACT&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(d,_),"abstract"),p&i.CommonFlags.GET&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(0,0),"get"),p&i.CommonFlags.SET&&this.error(o.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(I,v),"set");var P=null;if(e.skip(s.Token.COLON)){if(!(P=this.parseType(e)))return null}else this.error(o.DiagnosticCode.Type_expected,e.range());var w=null;if(e.skip(s.Token.EQUALS)&&!(w=this.parseExpression(e)))return null;var M=l.Node.createFieldDeclaration(A,P,w,a,p,e.range(r,e.pos));return e.skip(s.Token.SEMICOLON),M}this.error(o.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,A.range)}return null},t.prototype.parseNamespace=function(e,t,r,n){if(e.skipIdentifier()){var i=l.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.skip(s.Token.OPENBRACE)){for(var a=new Array,c=l.Node.createNamespaceDeclaration(i,a,r,t,e.range(n,e.pos));!e.skip(s.Token.CLOSEBRACE);){var p=this.parseTopLevelStatement(e,c);if(!p)return null;p.parent=c,a.push(p)}return e.skip(s.Token.SEMICOLON),c}this.error(o.DiagnosticCode._0_expected,e.range(),"{")}else this.error(o.DiagnosticCode.Identifier_expected,e.range());return null},t.prototype.parseExport=function(e,t,r){var n=null;if(e.skip(s.Token.OPENBRACE)){for(var i=new Array;!e.skip(s.Token.CLOSEBRACE);){var a=this.parseExportMember(e);if(!a)return null;if(i.push(a),!e.skip(s.Token.COMMA)){if(e.skip(s.Token.CLOSEBRACE))break;return this.error(o.DiagnosticCode._0_expected,e.range(),"}"),null}}if(e.skip(s.Token.FROM)){if(!e.skip(s.Token.STRINGLITERAL))return this.error(o.DiagnosticCode.String_literal_expected,e.range()),null;n=l.Node.createStringLiteralExpression(e.readString(),e.range())}return null===(p=(c=l.Node.createExportStatement(i,n,t,e.range(r,e.pos))).internalPath)||this.seenlog.has(p)||(this.backlog.push(p),this.seenlog.add(p)),e.skip(s.Token.SEMICOLON),c}if(e.skip(s.Token.ASTERISK))if(e.skip(s.Token.FROM)){if(e.skip(s.Token.STRINGLITERAL)){n=l.Node.createStringLiteralExpression(e.readString(),e.range());var c=l.Node.createExportStatement(null,n,t,e.range(r,e.pos)),p=assert(c.internalPath),u=e.source;return u.exportPaths||(u.exportPaths=new Set),u.exportPaths.add(p),this.seenlog.has(p)||(this.backlog.push(p),this.seenlog.add(p)),e.skip(s.Token.SEMICOLON),c}this.error(o.DiagnosticCode.String_literal_expected,e.range())}else this.error(o.DiagnosticCode._0_expected,e.range(),"from");else this.error(o.DiagnosticCode._0_expected,e.range(),"{");return null},t.prototype.parseExportMember=function(e){if(e.skipIdentifier()){var t=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),r=null;if(e.skip(s.Token.AS)){if(!e.skipIdentifierName())return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;r=l.Node.createIdentifierExpression(e.readIdentifier(),e.range())}return l.Node.createExportMember(t,r,r?s.Range.join(t.range,r.range):t.range)}return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseImport=function(e){var t=e.tokenPos,r=null,n=null,i=!1;if(e.skip(s.Token.OPENBRACE))for(r=new Array;!e.skip(s.Token.CLOSEBRACE);){var a=this.parseImportDeclaration(e);if(!a)return null;if(r.push(a),!e.skip(s.Token.COMMA)){if(e.skip(s.Token.CLOSEBRACE))break;return this.error(o.DiagnosticCode._0_expected,e.range(),"}"),null}}else if(e.skip(s.Token.ASTERISK)){if(!e.skip(s.Token.AS))return this.error(o.DiagnosticCode._0_expected,e.range(),"as"),null;if(!e.skipIdentifier())return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;n=l.Node.createIdentifierExpression(e.readIdentifier(),e.range())}else i=!0;if(i||e.skip(s.Token.FROM)){if(e.skip(s.Token.STRINGLITERAL)){var c=l.Node.createStringLiteralExpression(e.readString(),e.range()),p=void 0;n?(assert(!r),p=l.Node.createImportStatementWithWildcard(n,c,e.range(t,e.pos))):p=l.Node.createImportStatement(r,c,e.range(t,e.pos));var u=p.internalPath;return this.seenlog.has(u)||(this.backlog.push(u),this.seenlog.add(u)),e.skip(s.Token.SEMICOLON),p}this.error(o.DiagnosticCode.String_literal_expected,e.range())}else this.error(o.DiagnosticCode._0_expected,e.range(),"from");return null},t.prototype.parseImportDeclaration=function(e){if(e.skipIdentifierName()){var t=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),r=null;if(e.skip(s.Token.AS)){if(!e.skipIdentifier())return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;r=l.Node.createIdentifierExpression(e.readIdentifier(),e.range())}return l.Node.createImportDeclaration(t,r,r?s.Range.join(t.range,r.range):t.range)}return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseExportImport=function(e,t){if(e.skipIdentifier()){var r=l.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.skip(s.Token.EQUALS)){if(e.skipIdentifier()){var n=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),i=l.Node.createExportImportStatement(n,r,e.range(t,e.pos));return e.skip(s.Token.SEMICOLON),i}this.error(o.DiagnosticCode.Identifier_expected,e.range())}else this.error(o.DiagnosticCode._0_expected,e.range(),"=")}else this.error(o.DiagnosticCode.Identifier_expected,e.range());return null},t.prototype.parseStatement=function(e,t){void 0===t&&(t=!1);var r=e.mark(),n=null;switch(e.next()){case s.Token.BREAK:n=this.parseBreak(e);break;case s.Token.CONST:n=this.parseVariable(e,i.CommonFlags.CONST,null,e.tokenPos);break;case s.Token.CONTINUE:n=this.parseContinue(e);break;case s.Token.DO:n=this.parseDoStatement(e);break;case s.Token.FOR:n=this.parseForStatement(e);break;case s.Token.IF:n=this.parseIfStatement(e);break;case s.Token.LET:n=this.parseVariable(e,i.CommonFlags.LET,null,e.tokenPos);break;case s.Token.VAR:n=this.parseVariable(e,i.CommonFlags.NONE,null,e.tokenPos);break;case s.Token.OPENBRACE:n=this.parseBlockStatement(e,t);break;case s.Token.RETURN:t&&this.error(o.DiagnosticCode.A_return_statement_can_only_be_used_within_a_function_body,e.range()),n=this.parseReturn(e);break;case s.Token.SEMICOLON:return l.Node.createEmptyStatement(e.range(e.tokenPos));case s.Token.SWITCH:n=this.parseSwitchStatement(e);break;case s.Token.THROW:n=this.parseThrowStatement(e);break;case s.Token.TRY:n=this.parseTryStatement(e);break;case s.Token.VOID:n=this.parseVoidStatement(e);break;case s.Token.WHILE:n=this.parseWhileStatement(e);break;case s.Token.TYPE:if(e.peek(!1,s.IdentifierHandling.PREFER)==s.Token.IDENTIFIER){n=this.parseTypeDeclaration(e,i.CommonFlags.NONE,null,e.tokenPos);break}default:e.reset(r),n=this.parseExpressionStatement(e)}return n?e.discard(r):(e.reset(r),this.skipStatement(e)),n},t.prototype.parseBlockStatement=function(e,t){for(var r=e.tokenPos,n=new Array;!e.skip(s.Token.CLOSEBRACE);){var i=e.mark(),a=this.parseStatement(e,t);if(a)e.discard(i),n.push(a);else{if(e.token==s.Token.ENDOFFILE)return null;e.reset(i),this.skipStatement(e)}}var o=l.Node.createBlockStatement(n,e.range(r,e.pos));return e.skip(s.Token.SEMICOLON),o},t.prototype.parseBreak=function(e){var t=null;e.peek(!0)!=s.Token.IDENTIFIER||e.nextTokenOnNewLine||(e.next(s.IdentifierHandling.PREFER),t=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()));var r=l.Node.createBreakStatement(t,e.range());return e.skip(s.Token.SEMICOLON),r},t.prototype.parseContinue=function(e){var t=null;e.peek(!0)!=s.Token.IDENTIFIER||e.nextTokenOnNewLine||(e.next(s.IdentifierHandling.PREFER),t=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()));var r=l.Node.createContinueStatement(t,e.range());return e.skip(s.Token.SEMICOLON),r},t.prototype.parseDoStatement=function(e){var t=e.tokenPos,r=this.parseStatement(e);if(!r)return null;if(e.skip(s.Token.WHILE))if(e.skip(s.Token.OPENPAREN)){var n=this.parseExpression(e);if(!n)return null;if(e.skip(s.Token.CLOSEPAREN)){var i=l.Node.createDoStatement(r,n,e.range(t,e.pos));return e.skip(s.Token.SEMICOLON),i}this.error(o.DiagnosticCode._0_expected,e.range(),")")}else this.error(o.DiagnosticCode._0_expected,e.range(),"(");else this.error(o.DiagnosticCode._0_expected,e.range(),"while");return null},t.prototype.parseExpressionStatement=function(e){var t=this.parseExpression(e);if(!t)return null;var r=l.Node.createExpressionStatement(t);return e.skip(s.Token.SEMICOLON),r},t.prototype.parseForStatement=function(e){var t=e.tokenPos;if(e.skip(s.Token.OPENPAREN)){var r=null;if(e.skip(s.Token.CONST))r=this.parseVariable(e,i.CommonFlags.CONST,null,e.tokenPos);else if(e.skip(s.Token.LET))r=this.parseVariable(e,i.CommonFlags.LET,null,e.tokenPos);else if(e.skip(s.Token.VAR))r=this.parseVariable(e,i.CommonFlags.NONE,null,e.tokenPos);else if(!e.skip(s.Token.SEMICOLON)&&!(r=this.parseExpressionStatement(e)))return null;if(e.token==s.Token.SEMICOLON){var n=null;if(!e.skip(s.Token.SEMICOLON)&&!(n=this.parseExpressionStatement(e)))return null;if(e.token==s.Token.SEMICOLON){var a=null;if(!e.skip(s.Token.CLOSEPAREN)){if(!(a=this.parseExpression(e)))return null;if(!e.skip(s.Token.CLOSEPAREN))return this.error(o.DiagnosticCode._0_expected,e.range(),")"),null}var c=this.parseStatement(e);return c?l.Node.createForStatement(r,n?n.expression:null,a,c,e.range(t,e.pos)):null}this.error(o.DiagnosticCode._0_expected,e.range(),";")}else this.error(o.DiagnosticCode._0_expected,e.range(),";")}else this.error(o.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseIfStatement=function(e){var t=e.tokenPos;if(e.skip(s.Token.OPENPAREN)){var r=this.parseExpression(e);if(!r)return null;if(e.skip(s.Token.CLOSEPAREN)){var n=this.parseStatement(e);if(!n)return null;var i=null;return e.skip(s.Token.ELSE)&&!(i=this.parseStatement(e))?null:l.Node.createIfStatement(r,n,i,e.range(t,e.pos))}this.error(o.DiagnosticCode._0_expected,e.range(),")")}else this.error(o.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseSwitchStatement=function(e){var t=e.tokenPos;if(e.skip(s.Token.OPENPAREN)){var r=this.parseExpression(e);if(!r)return null;if(e.skip(s.Token.CLOSEPAREN)){if(e.skip(s.Token.OPENBRACE)){for(var n=new Array;!e.skip(s.Token.CLOSEBRACE);){var i=this.parseSwitchCase(e);if(!i)return null;n.push(i)}var a=l.Node.createSwitchStatement(r,n,e.range(t,e.pos));return e.skip(s.Token.SEMICOLON),a}this.error(o.DiagnosticCode._0_expected,e.range(),"{")}else this.error(o.DiagnosticCode._0_expected,e.range(),")")}else this.error(o.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseSwitchCase=function(e){var t,r,n=e.tokenPos;if(e.skip(s.Token.CASE)){var i=this.parseExpression(e);if(!i)return null;if(e.skip(s.Token.COLON)){for(t=new Array;e.peek()!=s.Token.CASE&&e.nextToken!=s.Token.DEFAULT&&e.nextToken!=s.Token.CLOSEBRACE;){if(!(r=this.parseStatement(e)))return null;t.push(r)}return l.Node.createSwitchCase(i,t,e.range(n,e.pos))}this.error(o.DiagnosticCode._0_expected,e.range(),":")}else if(e.skip(s.Token.DEFAULT)){if(e.skip(s.Token.COLON)){for(t=new Array;e.peek()!=s.Token.CASE&&e.nextToken!=s.Token.DEFAULT&&e.nextToken!=s.Token.CLOSEBRACE;){if(!(r=this.parseStatement(e)))return null;t.push(r)}return l.Node.createSwitchCase(null,t,e.range(n,e.pos))}this.error(o.DiagnosticCode._0_expected,e.range(),":")}else this.error(o.DiagnosticCode._case_or_default_expected,e.range());return null},t.prototype.parseThrowStatement=function(e){var t=e.tokenPos,r=this.parseExpression(e);if(!r)return null;var n=l.Node.createThrowStatement(r,e.range(t,e.pos));return e.skip(s.Token.SEMICOLON),n},t.prototype.parseTryStatement=function(e){var t,r=e.tokenPos;if(e.skip(s.Token.OPENBRACE)){for(var n=new Array;!e.skip(s.Token.CLOSEBRACE);){if(!(t=this.parseStatement(e)))return null;n.push(t)}var i=null,a=null,c=null;if(e.skip(s.Token.CATCH)){if(!e.skip(s.Token.OPENPAREN))return this.error(o.DiagnosticCode._0_expected,e.range(),"("),null;if(!e.skipIdentifier())return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;if(i=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),!e.skip(s.Token.CLOSEPAREN))return this.error(o.DiagnosticCode._0_expected,e.range(),")"),null;if(!e.skip(s.Token.OPENBRACE))return this.error(o.DiagnosticCode._0_expected,e.range(),"{"),null;for(a=[];!e.skip(s.Token.CLOSEBRACE);){if(!(t=this.parseStatement(e)))return null;a.push(t)}}if(e.skip(s.Token.FINALLY)){if(!e.skip(s.Token.OPENBRACE))return this.error(o.DiagnosticCode._0_expected,e.range(),"{"),null;for(c=[];!e.skip(s.Token.CLOSEBRACE);){if(!(t=this.parseStatement(e)))return null;c.push(t)}}if(!a&&!c)return this.error(o.DiagnosticCode._0_expected,e.range(),"catch"),null;var p=l.Node.createTryStatement(n,i,a,c,e.range(r,e.pos));return e.skip(s.Token.SEMICOLON),p}return this.error(o.DiagnosticCode._0_expected,e.range(),"{"),null},t.prototype.parseTypeDeclaration=function(e,t,r,n){if(e.skipIdentifier()){var a=l.Node.createIdentifierExpression(e.readIdentifier(),e.range()),c=null;if(e.skip(s.Token.LESSTHAN)){if(!(c=this.parseTypeParameters(e)))return null;t|=i.CommonFlags.GENERIC}if(e.skip(s.Token.EQUALS)){var p=this.parseType(e);if(!p)return null;var u=l.Node.createTypeDeclaration(a,c,p,r,t,e.range(n,e.pos));return e.skip(s.Token.SEMICOLON),u}this.error(o.DiagnosticCode._0_expected,e.range(),"=")}else this.error(o.DiagnosticCode.Identifier_expected,e.range());return null},t.prototype.parseVoidStatement=function(e){var t=e.tokenPos,r=this.parseExpression(e,21);if(!r)return null;var n=l.Node.createVoidStatement(r,e.range(t,e.pos));return e.skip(s.Token.SEMICOLON),n},t.prototype.parseWhileStatement=function(e){var t=e.tokenPos;if(e.skip(s.Token.OPENPAREN)){var r=this.parseExpression(e);if(!r)return null;if(e.skip(s.Token.CLOSEPAREN)){var n=this.parseStatement(e);if(!n)return null;var i=l.Node.createWhileStatement(r,n,e.range(t,e.pos));return e.skip(s.Token.SEMICOLON),i}this.error(o.DiagnosticCode._0_expected,e.range(),")")}else this.error(o.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseExpressionStart=function(e){var t=e.next(s.IdentifierHandling.PREFER),r=e.tokenPos,n=function(e){switch(e){case s.Token.DOT_DOT_DOT:return 2;case s.Token.YIELD:return 3;case s.Token.EXCLAMATION:case s.Token.TILDE:case s.Token.PLUS:case s.Token.MINUS:case s.Token.PLUS_PLUS:case s.Token.MINUS_MINUS:case s.Token.TYPEOF:case s.Token.VOID:case s.Token.DELETE:return 17;case s.Token.NEW:return 20}return 0}(t);if(0!=n){var a=void 0;return t==s.Token.NEW?(a=this.parseExpression(e,19))?a.kind==l.NodeKind.CALL?l.Node.createNewExpression(a.expression,a.typeArguments,a.arguments,e.range(r,e.pos)):(this.error(o.DiagnosticCode.Operation_not_supported,e.range()),null):null:(a=this.parseExpression(e,n))?(t!=s.Token.PLUS_PLUS&&t!=s.Token.MINUS_MINUS||a.kind!=l.NodeKind.IDENTIFIER&&a.kind!=l.NodeKind.ELEMENTACCESS&&a.kind!=l.NodeKind.PROPERTYACCESS&&this.error(o.DiagnosticCode.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access,a.range),l.Node.createUnaryPrefixExpression(t,a,e.range(r,e.pos))):null}var c=null;switch(t){case s.Token.NULL:return l.Node.createNullExpression(e.range());case s.Token.TRUE:return l.Node.createTrueExpression(e.range());case s.Token.FALSE:return l.Node.createFalseExpression(e.range());case s.Token.OPENPAREN:if(e.skip(s.Token.CLOSEPAREN))return this.parseFunctionExpressionCommon(e,l.Node.createEmptyIdentifierExpression(e.range(r)),[],!0);var p=e.mark(),u=!0;do{switch(e.next(s.IdentifierHandling.PREFER)){case s.Token.DOT_DOT_DOT:return e.reset(p),this.parseFunctionExpression(e);case s.Token.IDENTIFIER:switch(e.readIdentifier(),e.next()){case s.Token.CLOSEPAREN:if(!e.skip(s.Token.EQUALS_GREATERTHAN)){u=!1;break}case s.Token.COLON:return e.reset(p),this.parseFunctionExpression(e);case s.Token.QUESTION:case s.Token.COMMA:break;default:u=!1}break;default:u=!1}}while(u);return e.reset(p),(c=this.parseExpression(e))?e.skip(s.Token.CLOSEPAREN)?l.Node.createParenthesizedExpression(c,e.range(r,e.pos)):(this.error(o.DiagnosticCode._0_expected,e.range(),")"),null):null;case s.Token.OPENBRACKET:for(var h=new Array;!e.skip(s.Token.CLOSEBRACKET);){if(e.peek()==s.Token.COMMA)c=null;else if(!(c=this.parseExpression(e,2)))return null;if(h.push(c),!e.skip(s.Token.COMMA)){if(e.skip(s.Token.CLOSEBRACKET))break;return this.error(o.DiagnosticCode._0_expected,e.range(),"]"),null}}return l.Node.createArrayLiteralExpression(h,e.range(r,e.pos));case s.Token.OPENBRACE:for(var d=e.tokenPos,_=new Array,m=new Array,g=void 0;!e.skip(s.Token.CLOSEBRACE);){if(e.skipIdentifier())g=l.Node.createIdentifierExpression(e.readIdentifier(),e.range());else{if(!e.skip(s.Token.STRINGLITERAL))return this.error(o.DiagnosticCode.Identifier_expected,e.range()),null;(g=l.Node.createIdentifierExpression(e.readString(),e.range())).set(i.CommonFlags.QUOTED)}if(_.push(g),e.skip(s.Token.COLON)){var y=this.parseExpression(e,2);if(!y)return null;m.push(y)}else{if(g.is(i.CommonFlags.QUOTED))return this.error(o.DiagnosticCode._0_expected,e.range(),":"),null;m.push(g)}if(!e.skip(s.Token.COMMA)){if(e.skip(s.Token.CLOSEBRACE))break;return this.error(o.DiagnosticCode._0_expected,e.range(),"}"),null}}return l.Node.createObjectLiteralExpression(_,m,e.range(d,e.pos));case s.Token.LESSTHAN:var E=this.parseType(e);return E?e.skip(s.Token.GREATERTHAN)?(c=this.parseExpression(e,19))?l.Node.createAssertionExpression(l.AssertionKind.PREFIX,c,E,e.range(r,e.pos)):null:(this.error(o.DiagnosticCode._0_expected,e.range(),">"),null):null;case s.Token.IDENTIFIER:return l.Node.createIdentifierExpression(e.readIdentifier(),e.range(r,e.pos));case s.Token.THIS:return l.Node.createThisExpression(e.range(r,e.pos));case s.Token.CONSTRUCTOR:return l.Node.createConstructorExpression(e.range(r,e.pos));case s.Token.SUPER:return l.Node.createSuperExpression(e.range(r,e.pos));case s.Token.STRINGLITERAL:return l.Node.createStringLiteralExpression(e.readString(),e.range(r,e.pos));case s.Token.INTEGERLITERAL:return l.Node.createIntegerLiteralExpression(e.readInteger(),e.range(r,e.pos));case s.Token.FLOATLITERAL:return l.Node.createFloatLiteralExpression(e.readFloat(),e.range(r,e.pos));case s.Token.SLASH:var f=e.readRegexpPattern();return e.skip(s.Token.SLASH)?l.Node.createRegexpLiteralExpression(f,e.readRegexpFlags(),e.range(r,e.pos)):(this.error(o.DiagnosticCode._0_expected,e.range(),"/"),null);case s.Token.FUNCTION:return this.parseFunctionExpression(e);case s.Token.CLASS:return this.parseClassExpression(e);default:return t==s.Token.ENDOFFILE?this.error(o.DiagnosticCode.Unexpected_end_of_text,e.range(r)):this.error(o.DiagnosticCode.Expression_expected,e.range()),null}},t.prototype.tryParseTypeArgumentsBeforeArguments=function(e){var t=e.mark();if(!e.skip(s.Token.LESSTHAN))return null;var r=new Array;do{if(e.peek()===s.Token.GREATERTHAN)break;var n=this.parseType(e,!0,!0);if(!n)return e.reset(t),null;r.push(n)}while(e.skip(s.Token.COMMA));return e.skip(s.Token.GREATERTHAN)&&e.skip(s.Token.OPENPAREN)?r:(e.reset(t),null)},t.prototype.parseArguments=function(e){for(var t=new Array;!e.skip(s.Token.CLOSEPAREN);){var r=this.parseExpression(e,2);if(!r)return 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s.Token.INTEGERLITERAL:e.readInteger();break;case s.Token.FLOATLITERAL:e.readFloat()}}},t.prototype.skipBlock=function(e){var t=1,r=!0;do{switch(e.next()){case s.Token.ENDOFFILE:this.error(o.DiagnosticCode._0_expected,e.range(),"}"),r=!1;break;case s.Token.OPENBRACE:++t;break;case s.Token.CLOSEBRACE:--t||(r=!1);break;case s.Token.IDENTIFIER:e.readIdentifier();break;case s.Token.STRINGLITERAL:e.readString();break;case s.Token.INTEGERLITERAL:e.readInteger();break;case s.Token.FLOATLITERAL:e.readFloat()}}while(r)},t}(o.DiagnosticEmitter);function u(e){switch(e){case s.Token.COMMA:return 1;case s.Token.EQUALS:case s.Token.PLUS_EQUALS:case s.Token.MINUS_EQUALS:case s.Token.ASTERISK_ASTERISK_EQUALS:case s.Token.ASTERISK_EQUALS:case s.Token.SLASH_EQUALS:case s.Token.PERCENT_EQUALS:case s.Token.LESSTHAN_LESSTHAN_EQUALS:case s.Token.GREATERTHAN_GREATERTHAN_EQUALS:case s.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:case s.Token.AMPERSAND_EQUALS:case s.Token.CARET_EQUALS:case s.Token.BAR_EQUALS:return 4;case s.Token.QUESTION:return 5;case s.Token.BAR_BAR:return 6;case s.Token.AMPERSAND_AMPERSAND:return 7;case s.Token.BAR:return 8;case s.Token.CARET:return 9;case s.Token.AMPERSAND:return 10;case s.Token.EQUALS_EQUALS:case s.Token.EXCLAMATION_EQUALS:case s.Token.EQUALS_EQUALS_EQUALS:case s.Token.EXCLAMATION_EQUALS_EQUALS:return 11;case s.Token.AS:case s.Token.IN:case s.Token.INSTANCEOF:case s.Token.LESSTHAN:case s.Token.GREATERTHAN:case s.Token.LESSTHAN_EQUALS:case s.Token.GREATERTHAN_EQUALS:return 12;case s.Token.LESSTHAN_LESSTHAN:case s.Token.GREATERTHAN_GREATERTHAN:case s.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN:return 13;case s.Token.PLUS:case s.Token.MINUS:return 14;case s.Token.ASTERISK:case s.Token.SLASH:case s.Token.PERCENT:return 15;case s.Token.ASTERISK_ASTERISK:return 16;case s.Token.PLUS_PLUS:case s.Token.MINUS_MINUS:return 18;case s.Token.DOT:case s.Token.NEW:case s.Token.OPENBRACKET:return 20}return 0}function h(e){switch(e){case 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s.Token.ASTERISK_ASTERISK:return!0;default:return!1}}t.Parser=p,function(e){e[e.NONE=0]="NONE",e[e.COMMA=1]="COMMA",e[e.SPREAD=2]="SPREAD",e[e.YIELD=3]="YIELD",e[e.ASSIGNMENT=4]="ASSIGNMENT",e[e.CONDITIONAL=5]="CONDITIONAL",e[e.LOGICAL_OR=6]="LOGICAL_OR",e[e.LOGICAL_AND=7]="LOGICAL_AND",e[e.BITWISE_OR=8]="BITWISE_OR",e[e.BITWISE_XOR=9]="BITWISE_XOR",e[e.BITWISE_AND=10]="BITWISE_AND",e[e.EQUALITY=11]="EQUALITY",e[e.RELATIONAL=12]="RELATIONAL",e[e.SHIFT=13]="SHIFT",e[e.ADDITIVE=14]="ADDITIVE",e[e.MULTIPLICATIVE=15]="MULTIPLICATIVE",e[e.EXPONENTIATED=16]="EXPONENTIATED",e[e.UNARY_PREFIX=17]="UNARY_PREFIX",e[e.UNARY_POSTFIX=18]="UNARY_POSTFIX",e[e.CALL=19]="CALL",e[e.MEMBERACCESS=20]="MEMBERACCESS",e[e.GROUPING=21]="GROUPING"}(t.Precedence||(t.Precedence={}))}])});
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diff --git a/dist/assemblyscript.js.map b/dist/assemblyscript.js.map
index 1fc2f847..2ab7c4bc 100644
--- a/dist/assemblyscript.js.map
+++ b/dist/assemblyscript.js.map
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 /** Has a `let` modifier. */\r\n  LET = 1 << 4,\r\n  /** Has a `static` modifier. */\r\n  STATIC = 1 << 5,\r\n  /** Has a `readonly` modifier. */\r\n  READONLY = 1 << 6,\r\n  /** Has an `abstract` modifier. */\r\n  ABSTRACT = 1 << 7,\r\n  /** Has a `public` modifier. */\r\n  PUBLIC = 1 << 8,\r\n  /** Has a `private` modifier. */\r\n  PRIVATE = 1 << 9,\r\n  /** Has a `protected` modifier. */\r\n  PROTECTED = 1 << 10,\r\n  /** Has a `get` modifier. */\r\n  GET = 1 << 11,\r\n  /** Has a `set` modifier. */\r\n  SET = 1 << 12,\r\n\r\n  // Extended modifiers usually derived from basic modifiers\r\n\r\n  /** Is ambient, that is either declared or nested in a declared element. */\r\n  AMBIENT = 1 << 13,\r\n  /** Is generic. */\r\n  GENERIC = 1 << 14,\r\n  /** Is part of a generic context. */\r\n  GENERIC_CONTEXT = 1 << 15,\r\n  /** Is an instance member. */\r\n  INSTANCE = 1 << 16,\r\n  /** Is a constructor. */\r\n  CONSTRUCTOR = 1 << 17,\r\n  /** Is an arrow function. */\r\n  ARROW = 1 << 18,\r\n  /** Is a module export. */\r\n  MODULE_EXPORT = 1 << 19,\r\n  /** Is a module import. */\r\n  MODULE_IMPORT = 1 << 20,\r\n\r\n  // Compilation states\r\n\r\n  /** Is compiled. */\r\n  COMPILED = 1 << 21,\r\n  /** Has a constant value and is therefore inlined. */\r\n  INLINED = 1 << 22,\r\n  /** Is scoped. */\r\n  SCOPED = 1 << 23,\r\n  /** Is a trampoline. */\r\n  TRAMPOLINE = 1 << 24,\r\n  /** Is a virtual method. */\r\n  VIRTUAL = 1 << 25,\r\n  /** Is the main function. */\r\n  MAIN = 1 << 26,\r\n\r\n  // Other\r\n\r\n  QUOTED = 1 << 27\r\n}\r\n\r\n/** Path delimiter inserted between file system levels. */\r\nexport const PATH_DELIMITER = \"/\";\r\n/** Substitution used to indicate the parent directory. */\r\nexport const PARENT_SUBST = \"..\";\r\n/** Function name prefix used for getters. */\r\nexport const GETTER_PREFIX = \"get:\";\r\n/** Function name prefix used for setters. */\r\nexport const SETTER_PREFIX = \"set:\";\r\n/** Delimiter used between class names and instance members. */\r\nexport const INSTANCE_DELIMITER = \"#\";\r\n/** Delimiter used between class and namespace names and static members. */\r\nexport const STATIC_DELIMITER = \".\";\r\n/** Delimiter used between a function and its inner elements. */\r\nexport const INNER_DELIMITER = \"~\";\r\n/** Substitution used to indicate a library directory. */\r\nexport const LIBRARY_SUBST = \"~lib\";\r\n/** Library directory prefix. */\r\nexport const LIBRARY_PREFIX = LIBRARY_SUBST + PATH_DELIMITER;\r\n/** Prefix used to indicate a filespace element. */\r\nexport const FILESPACE_PREFIX = \"file:\";\r\n","/**\r\n * Shared diagnostic handling inherited by the parser and the compiler.\r\n * @module diagnostics\r\n * @preferred\r\n *//***/\r\n\r\nimport {\r\n  Range\r\n} from \"./ast\";\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  diagnosticCodeToString\r\n} from \"./diagnosticMessages.generated\";\r\n\r\nimport {\r\n  isLineBreak\r\n} from \"./util\";\r\n\r\nexport {\r\n  DiagnosticCode,\r\n  diagnosticCodeToString\r\n} from \"./diagnosticMessages.generated\";\r\n\r\n/** Indicates the category of a {@link DiagnosticMessage}. */\r\nexport enum DiagnosticCategory {\r\n  /** Informatory message. */\r\n  INFO,\r\n  /** Warning message. */\r\n  WARNING,\r\n  /** Error message. */\r\n  ERROR\r\n}\r\n\r\n/** Returns the string representation of the specified diagnostic category. */\r\nexport function diagnosticCategoryToString(category: DiagnosticCategory): string {\r\n  switch (category) {\r\n    case DiagnosticCategory.INFO: return \"INFO\";\r\n    case DiagnosticCategory.WARNING: return \"WARNING\";\r\n    case DiagnosticCategory.ERROR: return \"ERROR\";\r\n    default: {\r\n      assert(false);\r\n      return \"\";\r\n    }\r\n  }\r\n}\r\n\r\n/** ANSI escape sequence for blue foreground. */\r\nexport const COLOR_BLUE: string = \"\\u001b[96m\";\r\n/** ANSI escape sequence for yellow foreground. */\r\nexport const COLOR_YELLOW: string = \"\\u001b[93m\";\r\n/** ANSI escape sequence for red foreground. */\r\nexport const COLOR_RED: string = \"\\u001b[91m\";\r\n/** ANSI escape sequence to reset the foreground color. */\r\nexport const COLOR_RESET: string = \"\\u001b[0m\";\r\n\r\n/** Returns the ANSI escape sequence for the specified category. */\r\nexport function diagnosticCategoryToColor(category: DiagnosticCategory): string {\r\n  switch (category) {\r\n    case DiagnosticCategory.INFO: return COLOR_BLUE;\r\n    case DiagnosticCategory.WARNING: return COLOR_YELLOW;\r\n    case DiagnosticCategory.ERROR: return COLOR_RED;\r\n    default: {\r\n      assert(false);\r\n      return \"\";\r\n    }\r\n  }\r\n}\r\n\r\n/** Represents a diagnostic message. */\r\nexport class DiagnosticMessage {\r\n\r\n  /** Message code. */\r\n  code: i32;\r\n  /** Message category. */\r\n  category: DiagnosticCategory;\r\n  /** Message text. */\r\n  message: string;\r\n  /** Respective source range, if any. */\r\n  range: Range | null = null;\r\n\r\n  /** Constructs a new diagnostic message. */\r\n  private constructor(code: i32, category: DiagnosticCategory, message: string) {\r\n    this.code = code;\r\n    this.category = category;\r\n    this.message = message;\r\n  }\r\n\r\n  /** Creates a new diagnostic message of the specified category. */\r\n  static create(\r\n    code: DiagnosticCode,\r\n    category: DiagnosticCategory,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): DiagnosticMessage {\r\n    var message = diagnosticCodeToString(code);\r\n    if (arg0 != null) message = message.replace(\"{0}\", arg0);\r\n    if (arg1 != null) message = message.replace(\"{1}\", arg1);\r\n    if (arg2 != null) message = message.replace(\"{2}\", arg2);\r\n    return new DiagnosticMessage(code, category, message);\r\n  }\r\n\r\n  /** Creates a new informatory diagnostic message. */\r\n  static createInfo(\r\n    code: DiagnosticCode,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null\r\n  ): DiagnosticMessage {\r\n    return DiagnosticMessage.create(code, DiagnosticCategory.INFO, arg0, arg1);\r\n  }\r\n\r\n  /** Creates a new warning diagnostic message. */\r\n  static createWarning(\r\n    code: DiagnosticCode,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null\r\n  ): DiagnosticMessage {\r\n    return DiagnosticMessage.create(code, DiagnosticCategory.WARNING, arg0, arg1);\r\n  }\r\n\r\n  /** Creates a new error diagnostic message. */\r\n  static createError(\r\n    code: DiagnosticCode,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null\r\n  ): DiagnosticMessage {\r\n    return DiagnosticMessage.create(code, DiagnosticCategory.ERROR, arg0, arg1);\r\n  }\r\n\r\n  /** Adds a source range to this message. */\r\n  withRange(range: Range): this {\r\n    this.range = range;\r\n    return this;\r\n  }\r\n\r\n  /** Converts this message to a string. */\r\n  toString(): string {\r\n    if (this.range) {\r\n      return (\r\n        diagnosticCategoryToString(this.category) +\r\n        \" \" +\r\n        this.code.toString(10) +\r\n        \": \\\"\" +\r\n        this.message +\r\n        \"\\\" in \" +\r\n        this.range.source.normalizedPath +\r\n        \":\" +\r\n        this.range.line.toString(10) +\r\n        \":\" +\r\n        this.range.column.toString(10)\r\n      );\r\n    }\r\n    return (\r\n      diagnosticCategoryToString(this.category) +\r\n      \" \" +\r\n      this.code.toString(10) +\r\n      \": \" +\r\n      this.message\r\n    );\r\n  }\r\n}\r\n\r\n/** Formats a diagnostic message, optionally with terminal colors and source context. */\r\nexport function formatDiagnosticMessage(\r\n  message: DiagnosticMessage,\r\n  useColors: bool = false,\r\n  showContext: bool = false\r\n): string {\r\n\r\n  // general information\r\n  var sb: string[] = [];\r\n  if (useColors) sb.push(diagnosticCategoryToColor(message.category));\r\n  sb.push(diagnosticCategoryToString(message.category));\r\n  if (useColors) sb.push(COLOR_RESET);\r\n  sb.push(message.code < 1000 ? \" AS\" : \" TS\");\r\n  sb.push(message.code.toString(10));\r\n  sb.push(\": \");\r\n  sb.push(message.message);\r\n\r\n  // include range information if available\r\n  if (message.range) {\r\n\r\n    // include context information if requested\r\n    let range = message.range;\r\n    if (showContext) {\r\n      sb.push(\"\\n\");\r\n      sb.push(formatDiagnosticContext(message.range, useColors));\r\n    }\r\n\r\n    sb.push(\"\\n\");\r\n    sb.push(\" in \");\r\n    sb.push(range.source.normalizedPath);\r\n    sb.push(\"(\");\r\n    sb.push(range.line.toString(10));\r\n    sb.push(\",\");\r\n    sb.push(range.column.toString(10));\r\n    sb.push(\")\");\r\n  }\r\n  return sb.join(\"\");\r\n}\r\n\r\n/** Formats the diagnostic context for the specified range, optionally with terminal colors. */\r\nexport function formatDiagnosticContext(range: Range, useColors: bool = false): string {\r\n  var text = range.source.text;\r\n  var len = text.length;\r\n  var start = range.start;\r\n  var end = range.end;\r\n  while (start > 0 && !isLineBreak(text.charCodeAt(start - 1))) start--;\r\n  while (end < len && !isLineBreak(text.charCodeAt(end))) end++;\r\n  var sb: string[] = [\r\n    \"\\n \",\r\n    text.substring(start, end),\r\n    \"\\n \"\r\n  ];\r\n  while (start < range.start) {\r\n    sb.push(\" \");\r\n    start++;\r\n  }\r\n  if (useColors) sb.push(COLOR_RED);\r\n  if (range.start == range.end) {\r\n    sb.push(\"^\");\r\n  } else {\r\n    while (start++ < range.end) sb.push(\"~\");\r\n  }\r\n  if (useColors) sb.push(COLOR_RESET);\r\n  return sb.join(\"\");\r\n}\r\n\r\n/** Base class of all diagnostic emitters. */\r\nexport abstract class DiagnosticEmitter {\r\n\r\n  /** Diagnostic messages emitted so far. */\r\n  diagnostics: DiagnosticMessage[];\r\n\r\n  /** Initializes this diagnostic emitter. */\r\n  protected constructor(diagnostics: DiagnosticMessage[] | null = null) {\r\n    this.diagnostics = diagnostics ? <DiagnosticMessage[]>diagnostics : new Array();\r\n  }\r\n\r\n  /** Emits a diagnostic message of the specified category. */\r\n  emitDiagnostic(\r\n    code: DiagnosticCode,\r\n    category: DiagnosticCategory,\r\n    range: Range,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): void {\r\n    var message = DiagnosticMessage.create(code, category, arg0, arg1, arg2).withRange(range);\r\n    this.diagnostics.push(message);\r\n    // console.log(formatDiagnosticMessage(message, true, true) + \"\\n\"); // temporary\r\n    // console.log(<string>new Error(\"stack\").stack);\r\n  }\r\n\r\n  /** Emits an informatory diagnostic message. */\r\n  info(\r\n    code: DiagnosticCode,\r\n    range: Range,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): void {\r\n    this.emitDiagnostic(code, DiagnosticCategory.INFO, range, arg0, arg1, arg2);\r\n  }\r\n\r\n  /** Emits a warning diagnostic message. */\r\n  warning(\r\n    code: DiagnosticCode,\r\n    range: Range,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): void {\r\n    this.emitDiagnostic(code, DiagnosticCategory.WARNING, range, arg0, arg1, arg2);\r\n  }\r\n\r\n  /** Emits an error diagnostic message. */\r\n  error(\r\n    code: DiagnosticCode,\r\n    range: Range,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): void {\r\n    this.emitDiagnostic(code, DiagnosticCategory.ERROR, range, arg0, arg1, arg2);\r\n  }\r\n}\r\n","/**\r\n * Various compiler utilities.\r\n * @module util\r\n * @preferred\r\n *//***/\r\n\r\nexport * from \"./charcode\";\r\nexport * from \"./path\";\r\nexport * from \"./text\";\r\nexport * from \"./binary\";\r\n","/**\r\n * Abstract syntax tree representing a source file once parsed.\r\n * @module ast\r\n *//***/\r\n\r\nimport {\r\n  CommonFlags,\r\n  PATH_DELIMITER,\r\n  STATIC_DELIMITER,\r\n  INSTANCE_DELIMITER,\r\n  LIBRARY_PREFIX\r\n} from \"./common\";\r\n\r\nimport {\r\n  Token,\r\n  Tokenizer,\r\n  Range\r\n} from \"./tokenizer\";\r\n\r\nimport {\r\n  normalizePath,\r\n  resolvePath,\r\n  CharCode\r\n} from \"./util\";\r\n\r\nexport { Token, Range };\r\n\r\n/** Indicates the kind of a node. */\r\nexport enum NodeKind {\r\n\r\n  SOURCE,\r\n\r\n  // types\r\n  TYPE,\r\n  TYPEPARAMETER,\r\n  PARAMETER,\r\n  SIGNATURE,\r\n\r\n  // expressions\r\n  IDENTIFIER,\r\n  ASSERTION,\r\n  BINARY,\r\n  CALL,\r\n  CLASS,\r\n  COMMA,\r\n  ELEMENTACCESS,\r\n  FALSE,\r\n  FUNCTION,\r\n  INSTANCEOF,\r\n  LITERAL,\r\n  NEW,\r\n  NULL,\r\n  PARENTHESIZED,\r\n  PROPERTYACCESS,\r\n  TERNARY,\r\n  SUPER,\r\n  THIS,\r\n  TRUE,\r\n  CONSTRUCTOR,\r\n  UNARYPOSTFIX,\r\n  UNARYPREFIX,\r\n\r\n  // statements\r\n  BLOCK,\r\n  BREAK,\r\n  CONTINUE,\r\n  DO,\r\n  EMPTY,\r\n  EXPORT,\r\n  EXPORTIMPORT,\r\n  EXPRESSION,\r\n  FOR,\r\n  IF,\r\n  IMPORT,\r\n  RETURN,\r\n  SWITCH,\r\n  THROW,\r\n  TRY,\r\n  VARIABLE,\r\n  VOID,\r\n  WHILE,\r\n\r\n  // declaration statements\r\n  CLASSDECLARATION,\r\n  ENUMDECLARATION,\r\n  ENUMVALUEDECLARATION,\r\n  FIELDDECLARATION,\r\n  FUNCTIONDECLARATION,\r\n  IMPORTDECLARATION,\r\n  INTERFACEDECLARATION,\r\n  METHODDECLARATION,\r\n  NAMESPACEDECLARATION,\r\n  TYPEDECLARATION,\r\n  VARIABLEDECLARATION,\r\n\r\n  // special\r\n  DECORATOR,\r\n  EXPORTMEMBER,\r\n  SWITCHCASE,\r\n  COMMENT\r\n}\r\n\r\n/** Checks if a node represents a constant value. */\r\nexport function nodeIsConstantValue(kind: NodeKind): bool {\r\n  switch (kind) {\r\n    case NodeKind.LITERAL:\r\n    case NodeKind.NULL:\r\n    case NodeKind.TRUE:\r\n    case NodeKind.FALSE: return true;\r\n  }\r\n  return false;\r\n}\r\n\r\n/** Checks if a node might be callable. */\r\nexport function nodeIsCallable(kind: NodeKind): bool {\r\n  switch (kind) {\r\n    case NodeKind.IDENTIFIER:\r\n    case NodeKind.CALL:\r\n    case NodeKind.ELEMENTACCESS:\r\n    case NodeKind.PROPERTYACCESS: return true;\r\n  }\r\n  return false;\r\n}\r\n\r\n/** Checks if a node might be callable with generic arguments. */\r\nexport function nodeIsGenericCallable(kind: NodeKind): bool {\r\n  switch (kind) {\r\n    case NodeKind.IDENTIFIER:\r\n    case NodeKind.PROPERTYACCESS: return true;\r\n  }\r\n  return false;\r\n}\r\n\r\n/** Base class of all nodes. */\r\nexport abstract class Node {\r\n\r\n  /** Node kind indicator. */\r\n  kind: NodeKind;\r\n  /** Source range. */\r\n  range: Range;\r\n  /** Parent node. */\r\n  parent: Node | null = null;\r\n  /** Common flags indicating specific traits. */\r\n  flags: CommonFlags = CommonFlags.NONE;\r\n\r\n  /** Tests if this node has the specified flag or flags. */\r\n  is(flag: CommonFlags): bool { return (this.flags & flag) == flag; }\r\n  /** Tests if this node has one of the specified flags. */\r\n  isAny(flag: CommonFlags): bool { return (this.flags & flag) != 0; }\r\n  /** Sets a specific flag or flags. */\r\n  set(flag: CommonFlags): void { this.flags |= flag; }\r\n\r\n  // types\r\n\r\n  static createType(\r\n    name: IdentifierExpression,\r\n    typeArguments: CommonTypeNode[] | null,\r\n    isNullable: bool,\r\n    range: Range\r\n  ): TypeNode {\r\n    var type = new TypeNode();\r\n    type.range = range;\r\n    type.name = name; name.parent = type;\r\n    type.typeArguments = typeArguments; if (typeArguments) setParent(typeArguments, type);\r\n    type.isNullable = isNullable;\r\n    return type;\r\n  }\r\n\r\n  static createOmittedType(\r\n    range: Range\r\n  ): TypeNode {\r\n    return Node.createType(\r\n      Node.createIdentifierExpression(\"\", range),\r\n      null,\r\n      false,\r\n      range\r\n    );\r\n  }\r\n\r\n  static createTypeParameter(\r\n    name: IdentifierExpression,\r\n    extendsType: TypeNode | null,\r\n    range: Range\r\n  ): TypeParameterNode {\r\n    var elem = new TypeParameterNode();\r\n    elem.range = range;\r\n    elem.name = name; name.parent = elem;\r\n    elem.extendsType = extendsType; if (extendsType) extendsType.parent = elem;\r\n    return elem;\r\n  }\r\n\r\n  static createParameter(\r\n    name: IdentifierExpression,\r\n    type: CommonTypeNode,\r\n    initializer: Expression | null,\r\n    kind: ParameterKind,\r\n    range: Range\r\n  ): ParameterNode {\r\n    var elem = new ParameterNode();\r\n    elem.range = range;\r\n    elem.name = name; name.parent = elem;\r\n    elem.type = type; if (type) type.parent = elem;\r\n    elem.initializer = initializer; if (initializer) initializer.parent = elem;\r\n    elem.parameterKind = kind;\r\n    return elem;\r\n  }\r\n\r\n  static createSignature(\r\n    parameters: ParameterNode[],\r\n    returnType: CommonTypeNode,\r\n    explicitThisType: TypeNode | null,\r\n    isNullable: bool,\r\n    range: Range\r\n  ): SignatureNode {\r\n    var sig = new SignatureNode();\r\n    sig.range = range;\r\n    sig.parameters = parameters; setParent(parameters, sig);\r\n    sig.returnType = returnType; returnType.parent = sig;\r\n    sig.explicitThisType = explicitThisType; if (explicitThisType) explicitThisType.parent = sig;\r\n    sig.isNullable = isNullable;\r\n    return sig;\r\n  }\r\n\r\n  // special\r\n\r\n  static createDecorator(\r\n    name: Expression,\r\n    args: Expression[] | null,\r\n    range: Range\r\n  ): DecoratorNode {\r\n    var stmt = new DecoratorNode();\r\n    stmt.range = range;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.arguments = args; if (args) setParent(args, stmt);\r\n    stmt.decoratorKind = decoratorNameToKind(name);\r\n    return stmt;\r\n  }\r\n\r\n  static createComment(\r\n    text: string,\r\n    kind: CommentKind,\r\n    range: Range\r\n  ): CommentNode {\r\n    var node = new CommentNode();\r\n    node.range = range;\r\n    node.commentKind = kind;\r\n    node.text = text;\r\n    return node;\r\n  }\r\n\r\n  // expressions\r\n\r\n  static createIdentifierExpression(\r\n    name: string,\r\n    range: Range\r\n  ): IdentifierExpression {\r\n    var expr = new IdentifierExpression();\r\n    expr.range = range;\r\n    expr.text = name;\r\n    return expr;\r\n  }\r\n\r\n  static createEmptyIdentifierExpression(\r\n    range: Range\r\n  ): IdentifierExpression {\r\n    var expr = new IdentifierExpression();\r\n    expr.range = range;\r\n    expr.text = \"\";\r\n    return expr;\r\n  }\r\n\r\n  static createArrayLiteralExpression(\r\n    elements: (Expression | null)[],\r\n    range: Range\r\n  ): ArrayLiteralExpression {\r\n    var expr = new ArrayLiteralExpression();\r\n    expr.range = range;\r\n    expr.elementExpressions = elements; setParentIfNotNull(elements, expr);\r\n    return expr;\r\n  }\r\n\r\n  static createAssertionExpression(\r\n    assertionKind: AssertionKind,\r\n    expression: Expression,\r\n    toType: CommonTypeNode,\r\n    range: Range\r\n  ): AssertionExpression {\r\n    var expr = new AssertionExpression();\r\n    expr.range = range;\r\n    expr.assertionKind = assertionKind;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.toType = toType; toType.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createBinaryExpression(\r\n    operator: Token,\r\n    left: Expression,\r\n    right: Expression,\r\n    range: Range\r\n  ): BinaryExpression {\r\n    var expr = new BinaryExpression();\r\n    expr.range = range;\r\n    expr.operator = operator;\r\n    expr.left = left; left.parent = expr;\r\n    expr.right = right; right.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createCallExpression(\r\n    expression: Expression,\r\n    typeArgs: CommonTypeNode[] | null,\r\n    args: Expression[],\r\n    range: Range\r\n  ): CallExpression {\r\n    var expr = new CallExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.typeArguments = typeArgs; if (typeArgs) setParent(typeArgs, expr);\r\n    expr.arguments = args; setParent(args, expr);\r\n    return expr;\r\n  }\r\n\r\n  static createClassExpression(\r\n    declaration: ClassDeclaration\r\n  ): ClassExpression {\r\n    var expr = new ClassExpression();\r\n    expr.range = declaration.range;\r\n    expr.declaration = declaration;\r\n    return expr;\r\n  }\r\n\r\n  static createCommaExpression(\r\n    expressions: Expression[],\r\n    range: Range\r\n  ): CommaExpression {\r\n    var expr = new CommaExpression();\r\n    expr.range = range;\r\n    expr.expressions = expressions; setParent(expressions, expr);\r\n    return expr;\r\n  }\r\n\r\n  static createConstructorExpression(\r\n    range: Range\r\n  ): ConstructorExpression {\r\n    var expr = new ConstructorExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createElementAccessExpression(\r\n    expression: Expression,\r\n    element: Expression,\r\n    range: Range\r\n  ): ElementAccessExpression {\r\n    var expr = new ElementAccessExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.elementExpression = element; element.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createFalseExpression(\r\n    range: Range\r\n  ): FalseExpression {\r\n    var expr = new FalseExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createFloatLiteralExpression(\r\n    value: f64,\r\n    range: Range\r\n  ): FloatLiteralExpression {\r\n    var expr = new FloatLiteralExpression();\r\n    expr.range = range;\r\n    expr.value = value;\r\n    return expr;\r\n  }\r\n\r\n  static createFunctionExpression(\r\n    declaration: FunctionDeclaration\r\n  ): FunctionExpression {\r\n    var expr = new FunctionExpression();\r\n    expr.flags = declaration.flags & CommonFlags.ARROW;\r\n    expr.range = declaration.range;\r\n    expr.declaration = declaration;\r\n    return expr;\r\n  }\r\n\r\n  static createInstanceOfExpression(\r\n    expression: Expression,\r\n    isType: CommonTypeNode,\r\n    range: Range\r\n  ): InstanceOfExpression {\r\n    var expr = new InstanceOfExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.isType = isType; isType.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createIntegerLiteralExpression(\r\n    value: I64,\r\n    range: Range\r\n  ): IntegerLiteralExpression {\r\n    var expr = new IntegerLiteralExpression();\r\n    expr.range = range;\r\n    expr.value = value;\r\n    return expr;\r\n  }\r\n\r\n  static createNewExpression(\r\n    expression: Expression,\r\n    typeArgs: CommonTypeNode[] | null,\r\n    args: Expression[],\r\n    range: Range\r\n  ): NewExpression {\r\n    var expr = new NewExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.typeArguments = typeArgs; if (typeArgs) setParent(typeArgs, expr);\r\n    expr.arguments = args; setParent(args, expr);\r\n    return expr;\r\n  }\r\n\r\n  static createNullExpression(\r\n    range: Range\r\n  ): NullExpression {\r\n    var expr = new NullExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createObjectLiteralExpression(\r\n    names: IdentifierExpression[],\r\n    values: Expression[],\r\n    range: Range\r\n  ): ObjectLiteralExpression {\r\n    var expr = new ObjectLiteralExpression();\r\n    expr.range = range;\r\n    expr.names = names;\r\n    expr.values = values;\r\n    return expr;\r\n  }\r\n\r\n  static createParenthesizedExpression(\r\n    expression: Expression,\r\n    range: Range\r\n  ): ParenthesizedExpression {\r\n    var expr = new ParenthesizedExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createPropertyAccessExpression(\r\n    expression: Expression,\r\n    property: IdentifierExpression,\r\n    range: Range\r\n  ): PropertyAccessExpression {\r\n    var expr = new PropertyAccessExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.property = property; property.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createRegexpLiteralExpression(\r\n    pattern: string,\r\n    flags: string,\r\n    range: Range\r\n  ): RegexpLiteralExpression {\r\n    var expr = new RegexpLiteralExpression();\r\n    expr.range = range;\r\n    expr.pattern = pattern;\r\n    expr.patternFlags = flags;\r\n    return expr;\r\n  }\r\n\r\n  static createTernaryExpression(\r\n    condition: Expression,\r\n    ifThen: Expression,\r\n    ifElse: Expression,\r\n    range: Range\r\n  ): TernaryExpression {\r\n    var expr = new TernaryExpression();\r\n    expr.range = range;\r\n    expr.condition = condition; condition.parent = expr;\r\n    expr.ifThen = ifThen; ifThen.parent = expr;\r\n    expr.ifElse = ifElse; ifElse.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createStringLiteralExpression(\r\n    value: string,\r\n    range: Range\r\n  ): StringLiteralExpression {\r\n    var expr = new StringLiteralExpression();\r\n    expr.range = range;\r\n    expr.value = value;\r\n    return expr;\r\n  }\r\n\r\n  static createSuperExpression(\r\n    range: Range\r\n  ): SuperExpression {\r\n    var expr = new SuperExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createThisExpression(\r\n    range: Range\r\n  ): ThisExpression {\r\n    var expr = new ThisExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createTrueExpression(\r\n    range: Range\r\n  ): TrueExpression {\r\n    var expr = new TrueExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createUnaryPostfixExpression(\r\n    operator: Token,\r\n    operand: Expression,\r\n    range: Range\r\n  ): UnaryPostfixExpression {\r\n    var expr = new UnaryPostfixExpression();\r\n    expr.range = range;\r\n    expr.operator = operator;\r\n    expr.operand = operand; operand.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createUnaryPrefixExpression(\r\n    operator: Token,\r\n    operand: Expression,\r\n    range: Range\r\n  ): UnaryPrefixExpression {\r\n    var expr = new UnaryPrefixExpression();\r\n    expr.range = range;\r\n    expr.operator = operator;\r\n    expr.operand = operand; operand.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  // statements\r\n\r\n  static createBlockStatement(\r\n    statements: Statement[],\r\n    range: Range\r\n  ): BlockStatement {\r\n    var stmt = new BlockStatement();\r\n    stmt.range = range;\r\n    stmt.statements = statements; setParent(statements, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createBreakStatement(\r\n    label: IdentifierExpression | null,\r\n    range: Range\r\n  ): BreakStatement {\r\n    var stmt = new BreakStatement();\r\n    stmt.range = range;\r\n    stmt.label = label; if (label) label.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createClassDeclaration(\r\n    identifier: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[],\r\n    extendsType: TypeNode | null, // can't be a function\r\n    implementsTypes: TypeNode[] | null, // can't be functions\r\n    members: DeclarationStatement[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): ClassDeclaration {\r\n    var stmt = new ClassDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = identifier; identifier.parent = stmt;\r\n    stmt.typeParameters = typeParameters; setParent(typeParameters, stmt);\r\n    stmt.extendsType = extendsType; if (extendsType) extendsType.parent = stmt;\r\n    stmt.implementsTypes = implementsTypes; if (implementsTypes) setParent(implementsTypes, stmt);\r\n    stmt.members = members; setParent(members, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createContinueStatement(\r\n    label: IdentifierExpression | null,\r\n    range: Range\r\n  ): ContinueStatement {\r\n    var stmt = new ContinueStatement();\r\n    stmt.range = range;\r\n    stmt.label = label; if (label) label.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createDoStatement(\r\n    statement: Statement,\r\n    condition: Expression,\r\n    range: Range\r\n  ): DoStatement {\r\n    var stmt = new DoStatement();\r\n    stmt.range = range;\r\n    stmt.statement = statement; statement.parent = stmt;\r\n    stmt.condition = condition; condition.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createEmptyStatement(\r\n    range: Range\r\n  ): EmptyStatement {\r\n    var stmt = new EmptyStatement();\r\n    stmt.range = range;\r\n    return stmt;\r\n  }\r\n\r\n  static createEnumDeclaration(\r\n    name: IdentifierExpression,\r\n    members: EnumValueDeclaration[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): EnumDeclaration {\r\n    var stmt = new EnumDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.values = members; setParent(members, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createEnumValueDeclaration(\r\n    name: IdentifierExpression,\r\n    value: Expression | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): EnumValueDeclaration {\r\n    var stmt = new EnumValueDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.value = value; if (value) value.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createExportStatement(\r\n    members: ExportMember[] | null,\r\n    path: StringLiteralExpression | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): ExportStatement {\r\n    var stmt = new ExportStatement();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.members = members; if (members) setParent(members, stmt);\r\n    stmt.path = path;\r\n    if (path) {\r\n      let normalizedPath = normalizePath(path.value);\r\n      if (path.value.startsWith(\".\")) { // relative\r\n        stmt.normalizedPath = resolvePath(\r\n          normalizedPath,\r\n          range.source.normalizedPath\r\n        );\r\n      } else { // absolute\r\n        stmt.normalizedPath = normalizedPath;\r\n      }\r\n      stmt.internalPath = mangleInternalPath(stmt.normalizedPath);\r\n    } else {\r\n      stmt.normalizedPath = null;\r\n      stmt.internalPath = null;\r\n    }\r\n    return stmt;\r\n  }\r\n\r\n  static createExportImportStatement(\r\n    name: IdentifierExpression,\r\n    externalName: IdentifierExpression,\r\n    range: Range\r\n  ): ExportImportStatement {\r\n    var stmt = new ExportImportStatement();\r\n    stmt.range = range;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.externalName = externalName; externalName.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createExportMember(\r\n    name: IdentifierExpression,\r\n    externalName: IdentifierExpression | null,\r\n    range: Range\r\n  ): ExportMember {\r\n    var elem = new ExportMember();\r\n    elem.range = range;\r\n    elem.name = name; name.parent = elem;\r\n    if (!externalName) {\r\n      externalName = name;\r\n    } else {\r\n      externalName.parent = elem;\r\n    }\r\n    elem.externalName = externalName;\r\n    return elem;\r\n  }\r\n\r\n  static createExpressionStatement(\r\n    expression: Expression\r\n  ): ExpressionStatement {\r\n    var stmt = new ExpressionStatement();\r\n    stmt.range = expression.range;\r\n    stmt.expression = expression; expression.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createIfStatement(\r\n    condition: Expression,\r\n    ifTrue: Statement,\r\n    ifFalse: Statement | null,\r\n    range: Range\r\n  ): IfStatement {\r\n    var stmt = new IfStatement();\r\n    stmt.range = range;\r\n    stmt.condition = condition; condition.parent = stmt;\r\n    stmt.ifTrue = ifTrue; ifTrue.parent = stmt;\r\n    stmt.ifFalse = ifFalse; if (ifFalse) ifFalse.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createImportStatement(\r\n    decls: ImportDeclaration[] | null,\r\n    path: StringLiteralExpression,\r\n    range: Range\r\n  ): ImportStatement {\r\n    var stmt = new ImportStatement();\r\n    stmt.range = range;\r\n    stmt.declarations = decls; if (decls) setParent(decls, stmt);\r\n    stmt.namespaceName = null;\r\n    stmt.path = path;\r\n    var normalizedPath = normalizePath(path.value);\r\n    if (path.value.startsWith(\".\")) { // relative in project\r\n      stmt.normalizedPath = resolvePath(\r\n        normalizedPath,\r\n        range.source.normalizedPath\r\n      );\r\n    } else { // absolute in library\r\n      if (!normalizedPath.startsWith(LIBRARY_PREFIX)) {\r\n        normalizedPath = LIBRARY_PREFIX + normalizedPath;\r\n      }\r\n      stmt.normalizedPath = normalizedPath;\r\n    }\r\n    stmt.internalPath = mangleInternalPath(stmt.normalizedPath);\r\n    return stmt;\r\n  }\r\n\r\n  static createImportStatementWithWildcard(\r\n    identifier: IdentifierExpression,\r\n    path: StringLiteralExpression,\r\n    range: Range\r\n  ): ImportStatement {\r\n    var stmt = new ImportStatement();\r\n    stmt.range = range;\r\n    stmt.declarations = null;\r\n    stmt.namespaceName = identifier;\r\n    stmt.path = path;\r\n    stmt.normalizedPath = resolvePath(\r\n      normalizePath(path.value),\r\n      range.source.normalizedPath\r\n    );\r\n    stmt.internalPath = mangleInternalPath(stmt.normalizedPath);\r\n    return stmt;\r\n  }\r\n\r\n  static createImportDeclaration(\r\n    externalName: IdentifierExpression,\r\n    name: IdentifierExpression | null,\r\n    range: Range\r\n  ): ImportDeclaration {\r\n    var elem = new ImportDeclaration();\r\n    elem.range = range;\r\n    elem.externalName = externalName; externalName.parent = elem;\r\n    if (!name) {\r\n      name = externalName;\r\n    } else {\r\n      name.parent = elem;\r\n    }\r\n    elem.name = name;\r\n    return elem;\r\n  }\r\n\r\n  static createInterfaceDeclaration(\r\n    name: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[],\r\n    extendsType: TypeNode | null, // can't be a function\r\n    members: DeclarationStatement[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): InterfaceDeclaration {\r\n    var stmt = new InterfaceDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.typeParameters = typeParameters; if (typeParameters) setParent(typeParameters, stmt);\r\n    stmt.extendsType = extendsType; if (extendsType) extendsType.parent = stmt;\r\n    stmt.members = members; setParent(members, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createFieldDeclaration(\r\n    name: IdentifierExpression,\r\n    type: CommonTypeNode | null,\r\n    initializer: Expression | null,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): FieldDeclaration {\r\n    var stmt = new FieldDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.type = type; if (type) type.parent = stmt;\r\n    stmt.initializer = initializer; if (initializer) initializer.parent = stmt;\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createForStatement(\r\n    initializer: Statement | null,\r\n    condition: Expression | null,\r\n    incrementor: Expression | null,\r\n    statement: Statement,\r\n    range: Range\r\n  ): ForStatement {\r\n    var stmt = new ForStatement();\r\n    stmt.range = range;\r\n    stmt.initializer = initializer; if (initializer) initializer.parent = stmt;\r\n    stmt.condition = condition; if (condition) condition.parent = stmt;\r\n    stmt.incrementor = incrementor; if (incrementor) incrementor.parent = stmt;\r\n    stmt.statement = statement; statement.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createFunctionDeclaration(\r\n    name: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[] | null,\r\n    signature: SignatureNode,\r\n    body: Statement | null,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): FunctionDeclaration {\r\n    var stmt = new FunctionDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.typeParameters = typeParameters; if (typeParameters) setParent(typeParameters, stmt);\r\n    stmt.signature = signature; signature.parent = stmt;\r\n    stmt.body = body; if (body) body.parent = stmt;\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createMethodDeclaration(\r\n    name: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[] | null,\r\n    signature: SignatureNode,\r\n    body: Statement | null,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): MethodDeclaration {\r\n    var stmt = new MethodDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.typeParameters = typeParameters; if (typeParameters) setParent(typeParameters, stmt);\r\n    stmt.signature = signature; signature.parent = stmt;\r\n    stmt.body = body; if (body) body.parent = stmt;\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createNamespaceDeclaration(\r\n    name: IdentifierExpression,\r\n    members: Statement[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): NamespaceDeclaration {\r\n    var stmt = new NamespaceDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.members = members; setParent(members, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createReturnStatement(\r\n    value: Expression | null,\r\n    range: Range\r\n  ): ReturnStatement {\r\n    var stmt = new ReturnStatement();\r\n    stmt.range = range;\r\n    stmt.value = value; if (value) value.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createSwitchStatement(\r\n    condition: Expression,\r\n    cases: SwitchCase[],\r\n    range: Range\r\n  ): SwitchStatement {\r\n    var stmt = new SwitchStatement();\r\n    stmt.range = range;\r\n    stmt.condition = condition; condition.parent = stmt;\r\n    stmt.cases = cases; setParent(cases, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createSwitchCase(\r\n    label: Expression | null,\r\n    statements: Statement[],\r\n    range: Range\r\n  ): SwitchCase {\r\n    var elem = new SwitchCase();\r\n    elem.range = range;\r\n    elem.label = label; if (label) label.parent = elem;\r\n    elem.statements = statements; setParent(statements, elem);\r\n    return elem;\r\n  }\r\n\r\n  static createThrowStatement(\r\n    value: Expression,\r\n    range: Range\r\n  ): ThrowStatement {\r\n    var stmt = new ThrowStatement();\r\n    stmt.range = range;\r\n    stmt.value = value; value.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createTryStatement(\r\n    statements: Statement[],\r\n    catchVariable: IdentifierExpression | null,\r\n    catchStatements: Statement[] | null,\r\n    finallyStatements: Statement[] | null,\r\n    range: Range\r\n  ): TryStatement {\r\n    var stmt = new TryStatement();\r\n    stmt.range = range;\r\n    stmt.statements = statements; setParent(statements, stmt);\r\n    stmt.catchVariable = catchVariable;\r\n    if (catchVariable) catchVariable.parent = stmt;\r\n    stmt.catchStatements = catchStatements;\r\n    if (catchStatements) setParent(catchStatements, stmt);\r\n    stmt.finallyStatements = finallyStatements;\r\n    if (finallyStatements) setParent(finallyStatements, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createTypeDeclaration(\r\n    name: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[] | null,\r\n    alias: CommonTypeNode,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): TypeDeclaration {\r\n    var stmt = new TypeDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.typeParameters = typeParameters; if (typeParameters) setParent(typeParameters, stmt);\r\n    stmt.type = alias; alias.parent = stmt;\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createVariableStatement(\r\n    declarations: VariableDeclaration[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): VariableStatement {\r\n    var stmt = new VariableStatement();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.declarations = declarations; setParent(declarations, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createVariableDeclaration(\r\n    name: IdentifierExpression,\r\n    type: CommonTypeNode | null,\r\n    initializer: Expression | null,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): VariableDeclaration {\r\n    var elem = new VariableDeclaration();\r\n    elem.range = range;\r\n    elem.flags = flags;\r\n    elem.name = name; name.parent = elem;\r\n    elem.type = type; if (type) type.parent = elem;\r\n    elem.initializer = initializer; if (initializer) initializer.parent = elem;\r\n    elem.decorators = decorators; // inherited\r\n    return elem;\r\n  }\r\n\r\n  static createVoidStatement(\r\n    expression: Expression,\r\n    range: Range\r\n  ): VoidStatement {\r\n    var stmt = new VoidStatement();\r\n    stmt.range = range;\r\n    stmt.expression = expression;\r\n    return stmt;\r\n  }\r\n\r\n  static createWhileStatement(\r\n    condition: Expression,\r\n    statement: Statement,\r\n    range: Range\r\n  ): WhileStatement {\r\n    var stmt = new WhileStatement();\r\n    stmt.range = range;\r\n    stmt.condition = condition; condition.parent = stmt;\r\n    stmt.statement = statement; statement.parent = stmt;\r\n    return stmt;\r\n  }\r\n}\r\n\r\n// types\r\n\r\nexport abstract class CommonTypeNode extends Node {\r\n  // kind varies\r\n\r\n  /** Whether nullable or not. */\r\n  isNullable: bool;\r\n}\r\n\r\n/** Represents a type annotation. */\r\nexport class TypeNode extends CommonTypeNode {\r\n  kind = NodeKind.TYPE;\r\n\r\n  /** Identifier reference. */\r\n  name: IdentifierExpression;\r\n  /** Type argument references. */\r\n  typeArguments: CommonTypeNode[] | null;\r\n}\r\n\r\n/** Represents a type parameter. */\r\nexport class TypeParameterNode extends Node {\r\n  kind = NodeKind.TYPEPARAMETER;\r\n\r\n  /** Identifier reference. */\r\n  name: IdentifierExpression;\r\n  /** Extended type reference, if any. */\r\n  extendsType: TypeNode | null; // can't be a function\r\n}\r\n\r\n/** Represents the kind of a parameter. */\r\nexport enum ParameterKind {\r\n  /** No specific flags. */\r\n  DEFAULT,\r\n  /** Is an optional parameter. */\r\n  OPTIONAL,\r\n  /** Is a rest parameter. */\r\n  REST\r\n}\r\n\r\n/** Represents a function parameter. */\r\nexport class ParameterNode extends Node {\r\n  kind = NodeKind.PARAMETER;\r\n\r\n  /** Parameter kind. */\r\n  parameterKind: ParameterKind;\r\n  /** Parameter name. */\r\n  name: IdentifierExpression;\r\n  /** Parameter type. */\r\n  type: CommonTypeNode;\r\n  /** Initializer expression, if present. */\r\n  initializer: Expression | null;\r\n  /** Implicit field declaration, if applicable. */\r\n  implicitFieldDeclaration: FieldDeclaration | null = null;\r\n}\r\n\r\n/** Represents a function signature. */\r\nexport class SignatureNode extends CommonTypeNode {\r\n  kind = NodeKind.SIGNATURE;\r\n\r\n  /** Accepted parameters. */\r\n  parameters: ParameterNode[];\r\n  /** Return type. */\r\n  returnType: CommonTypeNode;\r\n  /** Explicitly provided this type, if any. */\r\n  explicitThisType: TypeNode | null; // can't be a function\r\n}\r\n\r\n// special\r\n\r\n/** Built-in decorator kinds. */\r\nexport enum DecoratorKind {\r\n  CUSTOM,\r\n  GLOBAL,\r\n  OPERATOR,\r\n  OPERATOR_BINARY,\r\n  OPERATOR_PREFIX,\r\n  OPERATOR_POSTFIX,\r\n  UNMANAGED,\r\n  SEALED,\r\n  INLINE,\r\n  EXTERNAL,\r\n  BUILTIN\r\n}\r\n\r\n/** Returns the kind of the specified decorator. Defaults to {@link DecoratorKind.CUSTOM}. */\r\nexport function decoratorNameToKind(name: Expression): DecoratorKind {\r\n  // @global, @inline, @operator, @sealed, @unmanaged\r\n  if (name.kind == NodeKind.IDENTIFIER) {\r\n    let nameStr = (<IdentifierExpression>name).text;\r\n    assert(nameStr.length);\r\n    switch (nameStr.charCodeAt(0)) {\r\n      case CharCode.b: {\r\n        if (nameStr == \"builtin\") return DecoratorKind.BUILTIN;\r\n        break;\r\n      }\r\n      case CharCode.e: {\r\n        if (nameStr == \"external\") return DecoratorKind.EXTERNAL;\r\n        break;\r\n      }\r\n      case CharCode.g: {\r\n        if (nameStr == \"global\") return DecoratorKind.GLOBAL;\r\n        break;\r\n      }\r\n      case CharCode.i: {\r\n        if (nameStr == \"inline\") return DecoratorKind.INLINE;\r\n        break;\r\n      }\r\n      case CharCode.o: {\r\n        if (nameStr == \"operator\") return DecoratorKind.OPERATOR;\r\n        break;\r\n      }\r\n      case CharCode.s: {\r\n        if (nameStr == \"sealed\") return DecoratorKind.SEALED;\r\n        break;\r\n      }\r\n      case CharCode.u: {\r\n        if (nameStr == \"unmanaged\") return DecoratorKind.UNMANAGED;\r\n        break;\r\n      }\r\n    }\r\n  } else if (\r\n    name.kind == NodeKind.PROPERTYACCESS &&\r\n    (<PropertyAccessExpression>name).expression.kind == NodeKind.IDENTIFIER\r\n  ) {\r\n    let nameStr = (<IdentifierExpression>(<PropertyAccessExpression>name).expression).text;\r\n    assert(nameStr.length);\r\n    let propStr = (<PropertyAccessExpression>name).property.text;\r\n    assert(propStr.length);\r\n    // @operator.binary, @operator.prefix, @operator.postfix\r\n    if (nameStr == \"operator\") {\r\n      switch (propStr.charCodeAt(0)) {\r\n        case CharCode.b: {\r\n          if (propStr == \"binary\") return DecoratorKind.OPERATOR_BINARY;\r\n          break;\r\n        }\r\n        case CharCode.p: {\r\n          switch (propStr) {\r\n            case \"prefix\": return DecoratorKind.OPERATOR_PREFIX;\r\n            case \"postfix\": return DecoratorKind.OPERATOR_POSTFIX;\r\n          }\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n  return DecoratorKind.CUSTOM;\r\n}\r\n\r\n/** Represents a decorator. */\r\nexport class DecoratorNode extends Node {\r\n  kind = NodeKind.DECORATOR;\r\n\r\n  /** Built-in kind, if applicable. */\r\n  decoratorKind: DecoratorKind;\r\n  /** Name expression. */\r\n  name: Expression;\r\n  /** Argument expressions. */\r\n  arguments: Expression[] | null;\r\n}\r\n\r\n/** Comment kinds. */\r\nexport enum CommentKind {\r\n  /** Line comment. */\r\n  LINE,\r\n  /** Triple-slash comment. */\r\n  TRIPLE,\r\n  /** Block comment. */\r\n  BLOCK\r\n}\r\n\r\n/** Represents a comment. */\r\nexport class CommentNode extends Node {\r\n  kind = NodeKind.COMMENT;\r\n\r\n  /** Comment kind. */\r\n  commentKind: CommentKind;\r\n  /** Comment text. */\r\n  text: string;\r\n}\r\n\r\n// expressions\r\n\r\n/** Base class of all expression nodes. */\r\nexport abstract class Expression extends Node { }\r\n\r\n/** Represents an identifier expression. */\r\nexport class IdentifierExpression extends Expression {\r\n  kind = NodeKind.IDENTIFIER;\r\n\r\n  /** Textual name. */\r\n  text: string;\r\n}\r\n\r\n/** Indicates the kind of a literal. */\r\nexport enum LiteralKind {\r\n  FLOAT,\r\n  INTEGER,\r\n  STRING,\r\n  REGEXP,\r\n  ARRAY,\r\n  OBJECT\r\n}\r\n\r\n/** Base class of all literal expressions. */\r\nexport abstract class LiteralExpression extends Expression {\r\n  kind = NodeKind.LITERAL;\r\n\r\n  /** Specific literal kind. */\r\n  literalKind: LiteralKind;\r\n}\r\n\r\n/** Represents an `[]` literal expression. */\r\nexport class ArrayLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.ARRAY;\r\n\r\n  /** Nested element expressions. */\r\n  elementExpressions: (Expression | null)[];\r\n}\r\n\r\n/** Indicates the kind of an assertion. */\r\nexport enum AssertionKind {\r\n  PREFIX,\r\n  AS\r\n}\r\n\r\n/** Represents an assertion expression. */\r\nexport class AssertionExpression extends Expression {\r\n  kind = NodeKind.ASSERTION;\r\n\r\n  /** Specific kind of this assertion. */\r\n  assertionKind: AssertionKind;\r\n  /** Expression being asserted. */\r\n  expression: Expression;\r\n  /** Target type. */\r\n  toType: CommonTypeNode;\r\n}\r\n\r\n/** Represents a binary expression. */\r\nexport class BinaryExpression extends Expression {\r\n  kind = NodeKind.BINARY;\r\n\r\n  /** Operator token. */\r\n  operator: Token;\r\n  /** Left-hand side expression */\r\n  left: Expression;\r\n  /** Right-hand side expression. */\r\n  right: Expression;\r\n}\r\n\r\n/** Represents a call expression. */\r\nexport class CallExpression extends Expression {\r\n  kind = NodeKind.CALL;\r\n\r\n  /** Called expression. Usually an identifier or property access expression. */\r\n  expression: Expression;\r\n  /** Provided type arguments. */\r\n  typeArguments: CommonTypeNode[] | null;\r\n  /** Provided arguments. */\r\n  arguments: Expression[];\r\n}\r\n\r\n/** Represents a class expression using the 'class' keyword. */\r\nexport class ClassExpression extends Expression {\r\n  kind = NodeKind.CLASS;\r\n\r\n  /** Inline class declaration. */\r\n  declaration: ClassDeclaration;\r\n}\r\n\r\n/** Represents a comma expression composed of multiple expressions. */\r\nexport class CommaExpression extends Expression {\r\n  kind = NodeKind.COMMA;\r\n\r\n  /** Sequential expressions. */\r\n  expressions: Expression[];\r\n}\r\n\r\n/** Represents a `constructor` expression. */\r\nexport class ConstructorExpression extends IdentifierExpression {\r\n  kind = NodeKind.CONSTRUCTOR;\r\n  text = \"constructor\";\r\n}\r\n\r\n/** Represents an element access expression, e.g., array access. */\r\nexport class ElementAccessExpression extends Expression {\r\n  kind = NodeKind.ELEMENTACCESS;\r\n\r\n  /** Expression being accessed. */\r\n  expression: Expression;\r\n  /** Element of the expression being accessed. */\r\n  elementExpression: Expression;\r\n}\r\n\r\n/** Represents a float literal expression. */\r\nexport class FloatLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.FLOAT;\r\n\r\n  /** Float value. */\r\n  value: f64;\r\n}\r\n\r\n/** Represents a function expression using the 'function' keyword. */\r\nexport class FunctionExpression extends Expression {\r\n  kind = NodeKind.FUNCTION;\r\n\r\n  /** Inline function declaration. */\r\n  declaration: FunctionDeclaration;\r\n}\r\n\r\n/** Represents an `instanceof` expression. */\r\nexport class InstanceOfExpression extends Expression {\r\n  kind = NodeKind.INSTANCEOF;\r\n\r\n  /** Expression being asserted. */\r\n  expression: Expression;\r\n  /** Type to test for. */\r\n  isType: CommonTypeNode;\r\n}\r\n\r\n/** Represents an integer literal expression. */\r\nexport class IntegerLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.INTEGER;\r\n\r\n  /** Integer value. */\r\n  value: I64;\r\n}\r\n\r\n/** Represents a `new` expression. Like a call but with its own kind. */\r\nexport class NewExpression extends CallExpression {\r\n  kind = NodeKind.NEW;\r\n}\r\n\r\n/** Represents a `null` expression. */\r\nexport class NullExpression extends IdentifierExpression {\r\n  kind = NodeKind.NULL;\r\n  text = \"null\";\r\n}\r\n\r\n/** Represents an object literal expression. */\r\nexport class ObjectLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.OBJECT;\r\n\r\n  /** Field names. */\r\n  names: IdentifierExpression[];\r\n  /** Field values. */\r\n  values: Expression[];\r\n}\r\n\r\n/** Represents a parenthesized expression. */\r\nexport class ParenthesizedExpression extends Expression {\r\n  kind = NodeKind.PARENTHESIZED;\r\n\r\n  /** Expression in parenthesis. */\r\n  expression: Expression;\r\n}\r\n\r\n/** Represents a property access expression. */\r\nexport class PropertyAccessExpression extends Expression {\r\n  kind = NodeKind.PROPERTYACCESS;\r\n\r\n  /** Expression being accessed. */\r\n  expression: Expression;\r\n  /** Property of the expression being accessed. */\r\n  property: IdentifierExpression;\r\n}\r\n\r\n/** Represents a regular expression literal expression. */\r\nexport class RegexpLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.REGEXP;\r\n\r\n  /** Regular expression pattern. */\r\n  pattern: string;\r\n  /** Regular expression flags. */\r\n  patternFlags: string;\r\n}\r\n\r\n/** Represents a ternary expression, i.e., short if notation. */\r\nexport class TernaryExpression extends Expression {\r\n  kind = NodeKind.TERNARY;\r\n\r\n  /** Condition expression. */\r\n  condition: Expression;\r\n  /** Expression executed when condition is `true`. */\r\n  ifThen: Expression;\r\n  /** Expression executed when condition is `false`. */\r\n  ifElse: Expression;\r\n}\r\n\r\n/** Represents a string literal expression. */\r\nexport class StringLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.STRING;\r\n\r\n  /** String value without quotes. */\r\n  value: string;\r\n}\r\n\r\n/** Represents a `super` expression. */\r\nexport class SuperExpression extends IdentifierExpression {\r\n  kind = NodeKind.SUPER;\r\n  text = \"super\";\r\n}\r\n\r\n/** Represents a `this` expression. */\r\nexport class ThisExpression extends IdentifierExpression {\r\n  kind = NodeKind.THIS;\r\n  text = \"this\";\r\n}\r\n\r\n/** Represents a `true` expression. */\r\nexport class TrueExpression extends IdentifierExpression {\r\n  kind = NodeKind.TRUE;\r\n  text = \"true\";\r\n}\r\n\r\n/** Represents a `false` expression. */\r\nexport class FalseExpression extends IdentifierExpression {\r\n  kind = NodeKind.FALSE;\r\n  text = \"false\";\r\n}\r\n\r\n/** Base class of all unary expressions. */\r\nexport abstract class UnaryExpression extends Expression {\r\n\r\n  /** Operator token. */\r\n  operator: Token;\r\n  /** Operand expression. */\r\n  operand: Expression;\r\n}\r\n\r\n/** Represents a unary postfix expression, e.g. a postfix increment. */\r\nexport class UnaryPostfixExpression extends UnaryExpression {\r\n  kind = NodeKind.UNARYPOSTFIX;\r\n}\r\n\r\n/** Represents a unary prefix expression, e.g. a negation. */\r\nexport class UnaryPrefixExpression extends UnaryExpression {\r\n  kind = NodeKind.UNARYPREFIX;\r\n}\r\n\r\n// statements\r\n\r\nexport function isLastStatement(statement: Statement): bool {\r\n  var parent = assert(statement.parent);\r\n  if (parent.kind == NodeKind.BLOCK) {\r\n    let statements = (<BlockStatement>parent).statements;\r\n    if (statements[statements.length - 1] === statement) {\r\n      switch (assert(parent.parent).kind) {\r\n        case NodeKind.FUNCTIONDECLARATION:\r\n        case NodeKind.METHODDECLARATION: return true;\r\n      }\r\n    }\r\n  }\r\n  return false;\r\n}\r\n\r\n/** Base class of all statement nodes. */\r\nexport abstract class Statement extends Node { }\r\n\r\n/** Indicates the specific kind of a source. */\r\nexport enum SourceKind {\r\n  /** Default source. Usually imported from an entry file. */\r\n  DEFAULT,\r\n  /** Entry file. */\r\n  ENTRY,\r\n  /** Library file. */\r\n  LIBRARY\r\n}\r\n\r\n/** A top-level source node. */\r\nexport class Source extends Node {\r\n  kind = NodeKind.SOURCE;\r\n  parent = null;\r\n\r\n  /** Source kind. */\r\n  sourceKind: SourceKind;\r\n  /** Normalized path. */\r\n  normalizedPath: string;\r\n  /** Path used internally. */\r\n  internalPath: string;\r\n  /** Simple path (last part without extension). */\r\n  simplePath: string;\r\n  /** Contained statements. */\r\n  statements: Statement[];\r\n  /** Full source text. */\r\n  text: string;\r\n  /** Tokenizer reference. */\r\n  tokenizer: Tokenizer | null = null;\r\n  /** Source map index. */\r\n  debugInfoIndex: i32 = -1;\r\n  /** Re-exported sources. */\r\n  exportPaths: Set<string> | null = null;\r\n\r\n  /** Constructs a new source node. */\r\n  constructor(normalizedPath: string, text: string, kind: SourceKind) {\r\n    super();\r\n    this.sourceKind = kind;\r\n    this.normalizedPath = normalizedPath;\r\n    var internalPath = mangleInternalPath(this.normalizedPath);\r\n    this.internalPath = internalPath;\r\n    var pos = internalPath.lastIndexOf(PATH_DELIMITER);\r\n    this.simplePath = pos >= 0 ? internalPath.substring(pos + 1) : internalPath;\r\n    this.statements = new Array();\r\n    this.range = new Range(this, 0, text.length);\r\n    this.text = text;\r\n  }\r\n\r\n  /** Tests if this source is an entry file. */\r\n  get isEntry(): bool { return this.sourceKind == SourceKind.ENTRY; }\r\n  /** Tests if this source is a stdlib file. */\r\n  get isLibrary(): bool { return this.sourceKind == SourceKind.LIBRARY; }\r\n}\r\n\r\n/** Base class of all declaration statements. */\r\nexport abstract class DeclarationStatement extends Statement {\r\n\r\n  /** Simple name being declared. */\r\n  name: IdentifierExpression;\r\n  /** Array of decorators. */\r\n  decorators: DecoratorNode[] | null = null;\r\n\r\n  protected cachedProgramLevelInternalName: string | null = null;\r\n  protected cachedFileLevelInternalName: string | null = null;\r\n\r\n  /** Gets the mangled program-level internal name of this declaration. */\r\n  get programLevelInternalName(): string {\r\n    if (!this.cachedProgramLevelInternalName) {\r\n      this.cachedProgramLevelInternalName = mangleInternalName(this, true);\r\n    }\r\n    return this.cachedProgramLevelInternalName;\r\n  }\r\n\r\n  /** Gets the mangled file-level internal name of this declaration. */\r\n  get fileLevelInternalName(): string {\r\n    if (!this.cachedFileLevelInternalName) {\r\n      this.cachedFileLevelInternalName = mangleInternalName(this, false);\r\n    }\r\n    return this.cachedFileLevelInternalName;\r\n  }\r\n\r\n  /** Tests if this is a top-level declaration within its source file. */\r\n  get isTopLevel(): bool {\r\n    var parent = this.parent;\r\n    if (!parent) {\r\n      return false;\r\n    }\r\n    if (parent.kind == NodeKind.VARIABLE && !(parent = parent.parent)) {\r\n      return false;\r\n    }\r\n    return parent.kind == NodeKind.SOURCE;\r\n  }\r\n\r\n  /** Tests if this declaration is a top-level export within its source file. */\r\n  get isTopLevelExport(): bool {\r\n    var parent = this.parent;\r\n    if (!parent || (parent.kind == NodeKind.VARIABLE && !(parent = parent.parent))) {\r\n      return false;\r\n    }\r\n    if (parent.kind == NodeKind.NAMESPACEDECLARATION) {\r\n      return this.is(CommonFlags.EXPORT) && (<NamespaceDeclaration>parent).isTopLevelExport;\r\n    }\r\n    if (parent.kind == NodeKind.CLASSDECLARATION) {\r\n      return this.is(CommonFlags.STATIC) && (<ClassDeclaration>parent).isTopLevelExport;\r\n    }\r\n    return parent.kind == NodeKind.SOURCE && this.is(CommonFlags.EXPORT);\r\n  }\r\n\r\n  /** Tests if this declaration needs an explicit export. */\r\n  needsExplicitExport(member: ExportMember): bool {\r\n    // This is necessary because module-level exports are automatically created\r\n    // for top level declarations of all sorts. This function essentially tests\r\n    // that there isn't a otherwise duplicate top-level export already.\r\n    return (\r\n      member.name.text != member.externalName.text || // if aliased\r\n      this.range.source != member.range.source ||     // if a re-export\r\n      !this.isTopLevelExport                          // if not top-level\r\n    );\r\n  }\r\n}\r\n\r\n/** Base class of all variable-like declaration statements. */\r\nexport abstract class VariableLikeDeclarationStatement extends DeclarationStatement {\r\n\r\n  /** Variable type. */\r\n  type: CommonTypeNode | null;\r\n  /** Variable initializer. */\r\n  initializer: Expression | null;\r\n}\r\n\r\n/** Represents a block statement. */\r\nexport class BlockStatement extends Statement {\r\n  kind = NodeKind.BLOCK;\r\n\r\n  /** Contained statements. */\r\n  statements: Statement[];\r\n}\r\n\r\n/** Represents a `break` statement. */\r\nexport class BreakStatement extends Statement {\r\n  kind = NodeKind.BREAK;\r\n\r\n  /** Target label, if applicable. */\r\n  label: IdentifierExpression | null;\r\n}\r\n\r\n/** Represents a `class` declaration. */\r\nexport class ClassDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.CLASSDECLARATION;\r\n\r\n  /** Accepted type parameters. */\r\n  typeParameters: TypeParameterNode[];\r\n  /** Base class type being extended, if any. */\r\n  extendsType: TypeNode | null; // can't be a function\r\n  /** Interface types being implemented, if any. */\r\n  implementsTypes: TypeNode[] | null; // can't be functions\r\n  /** Class member declarations. */\r\n  members: DeclarationStatement[];\r\n\r\n  get isGeneric(): bool {\r\n    var typeParameters = this.typeParameters;\r\n    return typeParameters != null && typeParameters.length > 0;\r\n  }\r\n}\r\n\r\n/** Represents a `continue` statement. */\r\nexport class ContinueStatement extends Statement {\r\n  kind = NodeKind.CONTINUE;\r\n\r\n  /** Target label, if applicable. */\r\n  label: IdentifierExpression | null;\r\n}\r\n\r\n/** Represents a `do` statement. */\r\nexport class DoStatement extends Statement {\r\n  kind = NodeKind.DO;\r\n\r\n  /** Statement being looped over. */\r\n  statement: Statement;\r\n  /** Condition when to repeat. */\r\n  condition: Expression;\r\n}\r\n\r\n/** Represents an empty statement, i.e., a semicolon terminating nothing. */\r\nexport class EmptyStatement extends Statement {\r\n  kind = NodeKind.EMPTY;\r\n}\r\n\r\n/** Represents an `enum` declaration. */\r\nexport class EnumDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.ENUMDECLARATION;\r\n\r\n  /** Enum value declarations. */\r\n  values: EnumValueDeclaration[];\r\n}\r\n\r\n/** Represents a value of an `enum` declaration. */\r\nexport class EnumValueDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.ENUMVALUEDECLARATION;\r\n  // name is inherited\r\n\r\n  /** Value expression. */\r\n  value: Expression | null;\r\n}\r\n\r\n/** Represents an `export import` statement of an interface. */\r\nexport class ExportImportStatement extends Node {\r\n  kind = NodeKind.EXPORTIMPORT;\r\n\r\n  /** Identifier being imported. */\r\n  name: IdentifierExpression;\r\n  /** Identifier being exported. */\r\n  externalName: IdentifierExpression;\r\n}\r\n\r\n/** Represents a member of an `export` statement. */\r\nexport class ExportMember extends Node {\r\n  kind = NodeKind.EXPORTMEMBER;\r\n\r\n  /** Identifier being exported. */\r\n  name: IdentifierExpression;\r\n  /** Identifier seen when imported again. */\r\n  externalName: IdentifierExpression;\r\n}\r\n\r\n/** Represents an `export` statement. */\r\nexport class ExportStatement extends Statement {\r\n  kind = NodeKind.EXPORT;\r\n\r\n  /** Array of members if a set of named exports, or `null` if a filespace export. */\r\n  members: ExportMember[] | null;\r\n  /** Path being exported from, if applicable. */\r\n  path: StringLiteralExpression | null;\r\n  /** Normalized path, if `path` is set. */\r\n  normalizedPath: string | null;\r\n  /** Mangled internal path being referenced, if `path` is set. */\r\n  internalPath: string | null;\r\n}\r\n\r\n/** Represents an expression that is used as a statement. */\r\nexport class ExpressionStatement extends Statement {\r\n  kind = NodeKind.EXPRESSION;\r\n\r\n  /** Expression being used as a statement.*/\r\n  expression: Expression;\r\n}\r\n\r\n/** Represents a field declaration within a `class`. */\r\nexport class FieldDeclaration extends VariableLikeDeclarationStatement {\r\n  kind = NodeKind.FIELDDECLARATION;\r\n\r\n  /** Parameter index within the constructor, if applicable. */\r\n  parameterIndex: i32 = -1;\r\n}\r\n\r\n/** Represents a `for` statement. */\r\nexport class ForStatement extends Statement {\r\n  kind = NodeKind.FOR;\r\n\r\n  /**\r\n   * Initializer statement, if present.\r\n   * Either a {@link VariableStatement} or {@link ExpressionStatement}.\r\n   */\r\n  initializer: Statement | null;\r\n  /** Condition expression, if present. */\r\n  condition: Expression | null;\r\n  /** Incrementor expression, if present. */\r\n  incrementor: Expression | null;\r\n  /** Statement being looped over. */\r\n  statement: Statement;\r\n}\r\n\r\n/** Represents a `function` declaration. */\r\nexport class FunctionDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.FUNCTIONDECLARATION;\r\n\r\n  /** Type parameters, if any. */\r\n  typeParameters: TypeParameterNode[] | null;\r\n  /** Function signature. */\r\n  signature: SignatureNode;\r\n  /** Body statement. Usually a block. */\r\n  body: Statement | null;\r\n\r\n  get isGeneric(): bool {\r\n    var typeParameters = this.typeParameters;\r\n    return typeParameters != null && typeParameters.length > 0;\r\n  }\r\n}\r\n\r\n/** Represents an `if` statement. */\r\nexport class IfStatement extends Statement {\r\n  kind = NodeKind.IF;\r\n\r\n  /** Condition. */\r\n  condition: Expression;\r\n  /** Statement executed when condition is `true`. */\r\n  ifTrue: Statement;\r\n  /** Statement executed when condition is `false`. */\r\n  ifFalse: Statement | null;\r\n}\r\n\r\n/** Represents an `import` declaration part of an {@link ImportStatement}. */\r\nexport class ImportDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.IMPORTDECLARATION;\r\n\r\n  /** Identifier being imported. */\r\n  externalName: IdentifierExpression;\r\n}\r\n\r\n/** Represents an `import` statement. */\r\nexport class ImportStatement extends Statement {\r\n  kind = NodeKind.IMPORT;\r\n\r\n  /** Array of member declarations or `null` if an asterisk import. */\r\n  declarations: ImportDeclaration[] | null;\r\n  /** Name of the local namespace, if an asterisk import. */\r\n  namespaceName: IdentifierExpression | null;\r\n  /** Path being imported from. */\r\n  path: StringLiteralExpression;\r\n  /** Normalized path. */\r\n  normalizedPath: string;\r\n  /** Mangled internal path being referenced. */\r\n  internalPath: string;\r\n}\r\n\r\n/** Represents an `interfarce` declaration. */\r\nexport class InterfaceDeclaration extends ClassDeclaration {\r\n  kind = NodeKind.INTERFACEDECLARATION;\r\n}\r\n\r\n/** Represents a method declaration within a `class`. */\r\nexport class MethodDeclaration extends FunctionDeclaration {\r\n  kind = NodeKind.METHODDECLARATION;\r\n}\r\n\r\n/** Represents a `namespace` declaration. */\r\nexport class NamespaceDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.NAMESPACEDECLARATION;\r\n\r\n  /** Array of namespace members. */\r\n  members: Statement[];\r\n}\r\n\r\n/** Represents a `return` statement. */\r\nexport class ReturnStatement extends Statement {\r\n  kind = NodeKind.RETURN;\r\n\r\n  /** Value expression being returned, if present. */\r\n  value: Expression | null;\r\n}\r\n\r\n/** Represents a single `case` within a `switch` statement. */\r\nexport class SwitchCase extends Node {\r\n  kind = NodeKind.SWITCHCASE;\r\n\r\n  /** Label expression. `null` indicates the default case. */\r\n  label: Expression | null;\r\n  /** Contained statements. */\r\n  statements: Statement[];\r\n}\r\n\r\n/** Represents a `switch` statement. */\r\nexport class SwitchStatement extends Statement {\r\n  kind = NodeKind.SWITCH;\r\n\r\n  /** Condition expression. */\r\n  condition: Expression;\r\n  /** Contained cases. */\r\n  cases: SwitchCase[];\r\n}\r\n\r\n/** Represents a `throw` statement. */\r\nexport class ThrowStatement extends Statement {\r\n  kind = NodeKind.THROW;\r\n\r\n  /** Value expression being thrown. */\r\n  value: Expression;\r\n}\r\n\r\n/** Represents a `try` statement. */\r\nexport class TryStatement extends Statement {\r\n  kind = NodeKind.TRY;\r\n\r\n  /** Contained statements. */\r\n  statements: Statement[];\r\n  /** Exception variable name, if a `catch` clause is present. */\r\n  catchVariable: IdentifierExpression | null;\r\n  /** Statements being executed on catch, if a `catch` clause is present. */\r\n  catchStatements: Statement[] | null;\r\n  /** Statements being executed afterwards, if a `finally` clause is present. */\r\n  finallyStatements: Statement[] | null;\r\n}\r\n\r\n/** Represents a `type` declaration. */\r\nexport class TypeDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.TYPEDECLARATION;\r\n\r\n  /** Type parameters, if any. */\r\n  typeParameters: TypeParameterNode[] | null;\r\n  /** Type being aliased. */\r\n  type: CommonTypeNode;\r\n}\r\n\r\n/** Represents a variable declaration part of a {@link VariableStatement}. */\r\nexport class VariableDeclaration extends VariableLikeDeclarationStatement {\r\n  kind = NodeKind.VARIABLEDECLARATION;\r\n}\r\n\r\n/** Represents a variable statement wrapping {@link VariableDeclaration}s. */\r\nexport class VariableStatement extends Statement {\r\n  kind = NodeKind.VARIABLE;\r\n\r\n  /** Array of decorators. */\r\n  decorators: DecoratorNode[] | null;\r\n  /** Array of member declarations. */\r\n  declarations: VariableDeclaration[];\r\n}\r\n\r\n/** Represents a void statement dropping an expression's value. */\r\nexport class VoidStatement extends Statement {\r\n  kind = NodeKind.VOID;\r\n\r\n  /** Expression being dropped. */\r\n  expression: Expression;\r\n}\r\n\r\n/** Represents a `while` statement. */\r\nexport class WhileStatement extends Statement {\r\n  kind = NodeKind.WHILE;\r\n\r\n  /** Condition expression. */\r\n  condition: Expression;\r\n  /** Statement being looped over. */\r\n  statement: Statement;\r\n}\r\n\r\n/** Finds the first decorator matching the specified kind. */\r\nexport function findDecorator(kind: DecoratorKind, decorators: DecoratorNode[] | null): DecoratorNode | null {\r\n  if (decorators) {\r\n    for (let i = 0, k = decorators.length; i < k; ++i) {\r\n      let decorator = decorators[i];\r\n      if (decorator.decoratorKind == kind) return decorator;\r\n    }\r\n  }\r\n  return null;\r\n}\r\n\r\n/** Mangles a declaration's name to an internal name. */\r\nexport function mangleInternalName(declaration: DeclarationStatement, asGlobal: bool = false): string {\r\n  var name = declaration.name.text;\r\n  var parent = declaration.parent;\r\n  if (!parent) return name;\r\n  if (\r\n    declaration.kind == NodeKind.VARIABLEDECLARATION &&\r\n    parent.kind == NodeKind.VARIABLE\r\n  ) { // skip over\r\n    if (!(parent = parent.parent)) return name;\r\n  }\r\n  if (parent.kind == NodeKind.CLASSDECLARATION) {\r\n    return mangleInternalName(<ClassDeclaration>parent, asGlobal) + (\r\n      declaration.is(CommonFlags.STATIC)\r\n        ? STATIC_DELIMITER\r\n        : INSTANCE_DELIMITER\r\n    ) + name;\r\n  }\r\n  if (\r\n    parent.kind == NodeKind.NAMESPACEDECLARATION ||\r\n    parent.kind == NodeKind.ENUMDECLARATION\r\n  ) {\r\n    return mangleInternalName(<DeclarationStatement>parent, asGlobal) +\r\n           STATIC_DELIMITER + name;\r\n  }\r\n  return asGlobal\r\n    ? name\r\n    : declaration.range.source.internalPath + PATH_DELIMITER + name;\r\n}\r\n\r\n/** Mangles an external to an internal path. */\r\nexport function mangleInternalPath(path: string): string {\r\n  if (path.endsWith(\".ts\")) path = path.substring(0, path.length - 3);\r\n  return path;\r\n}\r\n\r\n// Helpers\r\n\r\n/** Sets the parent node on an array of nodes. */\r\nfunction setParent(nodes: Node[], parent: Node): void {\r\n  for (let i = 0, k = nodes.length; i < k; ++i) {\r\n    nodes[i].parent = parent;\r\n  }\r\n}\r\n\r\n/** Sets the parent node on an array of nullable nodes. */\r\nfunction setParentIfNotNull(nodes: (Node | null)[], parent: Node): void {\r\n  for (let i = 0, k = nodes.length; i < k; ++i) {\r\n    let node = nodes[i];\r\n    if (node) node.parent = parent;\r\n  }\r\n}\r\n","/**\r\n * AssemblyScript's intermediate representation describing a program's elements.\r\n * @module program\r\n *//***/\r\n\r\nimport {\r\n  CommonFlags,\r\n  PATH_DELIMITER,\r\n  STATIC_DELIMITER,\r\n  INSTANCE_DELIMITER,\r\n  LIBRARY_PREFIX,\r\n  GETTER_PREFIX,\r\n  SETTER_PREFIX,\r\n  FILESPACE_PREFIX\r\n} from \"./common\";\r\n\r\nimport {\r\n  Options,\r\n  Feature\r\n} from \"./compiler\";\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  DiagnosticMessage,\r\n  DiagnosticEmitter\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Type,\r\n  TypeKind,\r\n  TypeFlags,\r\n  Signature\r\n} from \"./types\";\r\n\r\nimport {\r\n  Node,\r\n  NodeKind,\r\n  Source,\r\n  Range,\r\n  CommonTypeNode,\r\n  TypeParameterNode,\r\n  DecoratorNode,\r\n  DecoratorKind,\r\n\r\n  Expression,\r\n  IdentifierExpression,\r\n  LiteralExpression,\r\n  LiteralKind,\r\n  StringLiteralExpression,\r\n\r\n  ClassDeclaration,\r\n  DeclarationStatement,\r\n  EnumDeclaration,\r\n  EnumValueDeclaration,\r\n  ExportMember,\r\n  ExportStatement,\r\n  FieldDeclaration,\r\n  FunctionDeclaration,\r\n  ImportDeclaration,\r\n  ImportStatement,\r\n  InterfaceDeclaration,\r\n  MethodDeclaration,\r\n  NamespaceDeclaration,\r\n  TypeDeclaration,\r\n  VariableDeclaration,\r\n  VariableLikeDeclarationStatement,\r\n  VariableStatement,\r\n\r\n  decoratorNameToKind,\r\n  findDecorator\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Module,\r\n  NativeType,\r\n  FunctionRef,\r\n  ExpressionRef,\r\n  ExpressionId,\r\n  BinaryOp,\r\n  UnaryOp,\r\n\r\n  getExpressionId,\r\n  getGetLocalIndex,\r\n  isTeeLocal,\r\n  getSetLocalValue,\r\n  getBinaryOp,\r\n  getConstValueI32,\r\n  getBinaryLeft,\r\n  getBinaryRight,\r\n  getUnaryOp,\r\n  getExpressionType,\r\n  getLoadBytes,\r\n  isLoadSigned,\r\n  getIfTrue,\r\n  getIfFalse,\r\n  getSelectThen,\r\n  getSelectElse,\r\n  getCallTarget,\r\n  getBlockChildCount,\r\n  getBlockChild,\r\n  getBlockName,\r\n  getConstValueF32,\r\n  getConstValueF64,\r\n  getConstValueI64Low\r\n} from \"./module\";\r\n\r\nimport {\r\n  CharCode\r\n} from \"./util\";\r\n\r\nimport {\r\n  Resolver\r\n} from \"./resolver\";\r\n\r\n/** Represents a yet unresolved import. */\r\nclass QueuedImport {\r\n  localName: string;\r\n  externalName: string;\r\n  externalNameAlt: string;\r\n  declaration: ImportDeclaration | null; // not set if a filespace\r\n}\r\n\r\n/** Represents a yet unresolved export. */\r\nclass QueuedExport {\r\n  externalName: string;\r\n  isReExport: bool;\r\n  member: ExportMember;\r\n}\r\n\r\n/** Represents a type alias. */\r\nclass TypeAlias {\r\n  typeParameters: TypeParameterNode[] | null;\r\n  type: CommonTypeNode;\r\n}\r\n\r\n/** Represents a module-level export. */\r\nclass ModuleExport {\r\n  element: Element;\r\n  identifier: IdentifierExpression;\r\n}\r\n\r\n/** Represents the kind of an operator overload. */\r\nexport enum OperatorKind {\r\n  INVALID,\r\n\r\n  // indexed access\r\n  INDEXED_GET,            // a[]\r\n  INDEXED_SET,            // a[]=b\r\n  UNCHECKED_INDEXED_GET,  // unchecked(a[])\r\n  UNCHECKED_INDEXED_SET,  // unchecked(a[]=b)\r\n\r\n  // binary\r\n  ADD,                    // a + b\r\n  SUB,                    // a - b\r\n  MUL,                    // a * b\r\n  DIV,                    // a / b\r\n  REM,                    // a % b\r\n  POW,                    // a ** b\r\n  BITWISE_AND,            // a & b\r\n  BITWISE_OR,             // a | b\r\n  BITWISE_XOR,            // a ^ b\r\n  BITWISE_SHL,            // a << b\r\n  BITWISE_SHR,            // a >> b\r\n  BITWISE_SHR_U,          // a >>> b\r\n  EQ,                     // a == b\r\n  NE,                     // a != b\r\n  GT,                     // a > b\r\n  GE,                     // a >= b\r\n  LT,                     // a < b\r\n  LE,                     // a <= b\r\n\r\n  // unary prefix\r\n  PLUS,                   // +a\r\n  MINUS,                  // -a\r\n  NOT,                    // !a\r\n  BITWISE_NOT,            // ~a\r\n  PREFIX_INC,             // ++a\r\n  PREFIX_DEC,             // --a\r\n\r\n  // unary postfix\r\n  POSTFIX_INC,            // a++\r\n  POSTFIX_DEC             // a--\r\n\r\n  // not overridable:\r\n  // IDENTITY             // a === b\r\n  // LOGICAL_AND          // a && b\r\n  // LOGICAL_OR           // a || b\r\n}\r\n\r\n/** Returns the operator kind represented by the specified decorator and string argument. */\r\nfunction operatorKindFromDecorator(decoratorKind: DecoratorKind, arg: string): OperatorKind {\r\n  assert(arg.length);\r\n  switch (decoratorKind) {\r\n    case DecoratorKind.OPERATOR:\r\n    case DecoratorKind.OPERATOR_BINARY: {\r\n      switch (arg.charCodeAt(0)) {\r\n        case CharCode.OPENBRACKET: {\r\n          if (arg == \"[]\") return OperatorKind.INDEXED_GET;\r\n          if (arg == \"[]=\") return OperatorKind.INDEXED_SET;\r\n          break;\r\n        }\r\n        case CharCode.OPENBRACE: {\r\n          if (arg == \"{}\") return OperatorKind.UNCHECKED_INDEXED_GET;\r\n          if (arg == \"{}=\") return OperatorKind.UNCHECKED_INDEXED_SET;\r\n          break;\r\n        }\r\n        case CharCode.PLUS: {\r\n          if (arg == \"+\") return OperatorKind.ADD;\r\n          break;\r\n        }\r\n        case CharCode.MINUS: {\r\n          if (arg == \"-\") return OperatorKind.SUB;\r\n          break;\r\n        }\r\n        case CharCode.ASTERISK: {\r\n          if (arg == \"*\") return OperatorKind.MUL;\r\n          if (arg == \"**\") return OperatorKind.POW;\r\n          break;\r\n        }\r\n        case CharCode.SLASH: {\r\n          if (arg == \"/\") return OperatorKind.DIV;\r\n          break;\r\n        }\r\n        case CharCode.PERCENT: {\r\n          if (arg == \"%\") return OperatorKind.REM;\r\n          break;\r\n        }\r\n        case CharCode.AMPERSAND: {\r\n          if (arg == \"&\") return OperatorKind.BITWISE_AND;\r\n          break;\r\n        }\r\n        case CharCode.BAR: {\r\n          if (arg == \"|\") return OperatorKind.BITWISE_OR;\r\n          break;\r\n        }\r\n        case CharCode.CARET: {\r\n          if (arg == \"^\") return OperatorKind.BITWISE_XOR;\r\n          break;\r\n        }\r\n        case CharCode.EQUALS: {\r\n          if (arg == \"==\") return OperatorKind.EQ;\r\n          break;\r\n        }\r\n        case CharCode.EXCLAMATION: {\r\n          if (arg == \"!=\") return OperatorKind.NE;\r\n          break;\r\n        }\r\n        case CharCode.GREATERTHAN: {\r\n          if (arg == \">\") return OperatorKind.GT;\r\n          if (arg == \">=\") return OperatorKind.GE;\r\n          if (arg == \">>\") return OperatorKind.BITWISE_SHR;\r\n          if (arg == \">>>\") return OperatorKind.BITWISE_SHR_U;\r\n          break;\r\n        }\r\n        case CharCode.LESSTHAN: {\r\n          if (arg == \"<\") return OperatorKind.LT;\r\n          if (arg == \"<=\") return OperatorKind.LE;\r\n          if (arg == \"<<\") return OperatorKind.BITWISE_SHL;\r\n          break;\r\n        }\r\n      }\r\n      break;\r\n    }\r\n    case DecoratorKind.OPERATOR_PREFIX: {\r\n      switch (arg.charCodeAt(0)) {\r\n        case CharCode.PLUS: {\r\n          if (arg == \"+\") return OperatorKind.PLUS;\r\n          if (arg == \"++\") return OperatorKind.PREFIX_INC;\r\n          break;\r\n        }\r\n        case CharCode.MINUS: {\r\n          if (arg == \"-\") return OperatorKind.MINUS;\r\n          if (arg == \"--\") return OperatorKind.PREFIX_DEC;\r\n          break;\r\n        }\r\n        case CharCode.EXCLAMATION: {\r\n          if (arg == \"!\") return OperatorKind.NOT;\r\n          break;\r\n        }\r\n        case CharCode.TILDE: {\r\n          if (arg == \"~\") return OperatorKind.BITWISE_NOT;\r\n          break;\r\n        }\r\n      }\r\n      break;\r\n    }\r\n    case DecoratorKind.OPERATOR_POSTFIX: {\r\n      switch (arg.charCodeAt(0)) {\r\n        case CharCode.PLUS: {\r\n          if (arg == \"++\") return OperatorKind.POSTFIX_INC;\r\n          break;\r\n        }\r\n        case CharCode.MINUS: {\r\n          if (arg == \"--\") return OperatorKind.POSTFIX_DEC;\r\n          break;\r\n        }\r\n      }\r\n      break;\r\n    }\r\n  }\r\n  return OperatorKind.INVALID;\r\n}\r\n\r\nconst noTypesYet = new Map<string,Type>();\r\n\r\n/** Represents an AssemblyScript program. */\r\nexport class Program extends DiagnosticEmitter {\r\n\r\n  /** Array of source files. */\r\n  sources: Source[];\r\n  /** Resolver instance. */\r\n  resolver: Resolver;\r\n  /** Diagnostic offset used where successively obtaining the next diagnostic. */\r\n  diagnosticsOffset: i32 = 0;\r\n  /** Compiler options. */\r\n  options: Options;\r\n\r\n  /** Elements by internal name. */\r\n  elementsLookup: Map<string,Element> = new Map();\r\n  /** Class and function instances by internal name. */\r\n  instancesLookup: Map<string,Element> = new Map();\r\n  /** Types by internal name. */\r\n  typesLookup: Map<string,Type> = noTypesYet;\r\n  /** Declared type aliases. */\r\n  typeAliases: Map<string,TypeAlias> = new Map();\r\n  /** File-level exports by exported name. */\r\n  fileLevelExports: Map<string,Element> = new Map();\r\n  /** Module-level exports by exported name. */\r\n  moduleLevelExports: Map<string,ModuleExport> = new Map();\r\n\r\n  /** ArrayBuffer instance reference. */\r\n  arrayBufferInstance: Class | null = null;\r\n  /** Array prototype reference. */\r\n  arrayPrototype: ClassPrototype | null = null;\r\n  /** String instance reference. */\r\n  stringInstance: Class | null = null;\r\n  /** Start function reference. */\r\n  startFunction: FunctionPrototype;\r\n  /** Main function reference, if present. */\r\n  mainFunction: FunctionPrototype | null = null;\r\n  /** Abort function reference, if present. */\r\n  abortInstance: Function | null = null;\r\n  /** Memory allocation function. */\r\n  memoryAllocateInstance: Function | null = null;\r\n\r\n  /** Whether a garbage collector is present or not. */\r\n  hasGC: bool = false;\r\n  /** Garbage collector allocation function. */\r\n  gcAllocateInstance: Function | null = null;\r\n  /** Garbage collector link function called when a managed object is referenced from a parent. */\r\n  gcLinkInstance: Function | null = null;\r\n  /** Garbage collector mark function called to on reachable managed objects. */\r\n  gcMarkInstance: Function | null = null;\r\n  /** Size of a managed object header. */\r\n  gcHeaderSize: u32 = 0;\r\n  /** Offset of the GC hook. */\r\n  gcHookOffset: u32 = 0;\r\n\r\n  /** Currently processing filespace. */\r\n  currentFilespace: Filespace;\r\n\r\n  /** Constructs a new program, optionally inheriting parser diagnostics. */\r\n  constructor(diagnostics: DiagnosticMessage[] | null = null) {\r\n    super(diagnostics);\r\n    this.resolver = new Resolver(this);\r\n    this.sources = [];\r\n  }\r\n\r\n  /** Gets a source by its exact path. */\r\n  getSource(normalizedPath: string): Source | null {\r\n    var sources = this.sources;\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      let source = sources[i];\r\n      if (source.normalizedPath == normalizedPath) return source;\r\n    }\r\n    return null;\r\n  }\r\n\r\n  /** Looks up the source for the specified possibly ambiguous path. */\r\n  lookupSourceByPath(normalizedPathWithoutExtension: string): Source | null {\r\n    var tmp: string;\r\n    return (\r\n      this.getSource(normalizedPathWithoutExtension + \".ts\") ||\r\n      this.getSource(normalizedPathWithoutExtension + \"/index.ts\") ||\r\n      this.getSource((tmp = LIBRARY_PREFIX + normalizedPathWithoutExtension) + \".ts\") ||\r\n      this.getSource( tmp                                                    + \"/index.ts\")\r\n    );\r\n  }\r\n\r\n  /** Initializes the program and its elements prior to compilation. */\r\n  initialize(options: Options): void {\r\n    this.options = options;\r\n\r\n    // add built-in types\r\n    this.typesLookup = new Map([\r\n      [\"i8\", Type.i8],\r\n      [\"i16\", Type.i16],\r\n      [\"i32\", Type.i32],\r\n      [\"i64\", Type.i64],\r\n      [\"isize\", options.isizeType],\r\n      [\"u8\", Type.u8],\r\n      [\"u16\", Type.u16],\r\n      [\"u32\", Type.u32],\r\n      [\"u64\", Type.u64],\r\n      [\"usize\", options.usizeType],\r\n      [\"bool\", Type.bool],\r\n      [\"f32\", Type.f32],\r\n      [\"f64\", Type.f64],\r\n      [\"void\", Type.void],\r\n      [\"number\", Type.f64],\r\n      [\"boolean\", Type.bool]\r\n    ]);\r\n\r\n    // add compiler hints\r\n    this.setConstantInteger(\"ASC_TARGET\", Type.i32,\r\n      i64_new(options.isWasm64 ? 2 : 1));\r\n    this.setConstantInteger(\"ASC_NO_TREESHAKING\", Type.bool,\r\n      i64_new(options.noTreeShaking ? 1 : 0, 0));\r\n    this.setConstantInteger(\"ASC_NO_ASSERT\", Type.bool,\r\n      i64_new(options.noAssert ? 1 : 0, 0));\r\n    this.setConstantInteger(\"ASC_MEMORY_BASE\", Type.i32,\r\n      i64_new(options.memoryBase, 0));\r\n    this.setConstantInteger(\"ASC_OPTIMIZE_LEVEL\", Type.i32,\r\n      i64_new(options.optimizeLevelHint, 0));\r\n    this.setConstantInteger(\"ASC_SHRINK_LEVEL\", Type.i32,\r\n      i64_new(options.shrinkLevelHint, 0));\r\n    this.setConstantInteger(\"ASC_FEATURE_MUTABLE_GLOBAL\", Type.bool,\r\n      i64_new(options.hasFeature(Feature.MUTABLE_GLOBAL) ? 1 : 0, 0));\r\n    this.setConstantInteger(\"ASC_FEATURE_SIGN_EXTENSION\", Type.bool,\r\n      i64_new(options.hasFeature(Feature.SIGN_EXTENSION) ? 1 : 0, 0));\r\n\r\n    // remember deferred elements\r\n    var queuedImports = new Array<QueuedImport>();\r\n    var queuedExports = new Map<string,QueuedExport>();\r\n    var queuedExtends = new Array<ClassPrototype>();\r\n    var queuedImplements = new Array<ClassPrototype>();\r\n\r\n    // build initial lookup maps of internal names to declarations\r\n    for (let i = 0, k = this.sources.length; i < k; ++i) {\r\n      let source = this.sources[i];\r\n\r\n      // create one filespace per source\r\n      let filespace = new Filespace(this, source);\r\n      this.elementsLookup.set(filespace.internalName, filespace);\r\n      this.currentFilespace = filespace;\r\n\r\n      // process this source's statements\r\n      let statements = source.statements;\r\n      for (let j = 0, l = statements.length; j < l; ++j) {\r\n        let statement = statements[j];\r\n        switch (statement.kind) {\r\n          case NodeKind.CLASSDECLARATION: {\r\n            this.initializeClass(<ClassDeclaration>statement, queuedExtends, queuedImplements);\r\n            break;\r\n          }\r\n          case NodeKind.ENUMDECLARATION: {\r\n            this.initializeEnum(<EnumDeclaration>statement);\r\n            break;\r\n          }\r\n          case NodeKind.EXPORT: {\r\n            this.initializeExports(<ExportStatement>statement, queuedExports);\r\n            break;\r\n          }\r\n          case NodeKind.FUNCTIONDECLARATION: {\r\n            this.initializeFunction(<FunctionDeclaration>statement);\r\n            break;\r\n          }\r\n          case NodeKind.IMPORT: {\r\n            this.initializeImports(<ImportStatement>statement, queuedExports, queuedImports);\r\n            break;\r\n          }\r\n          case NodeKind.INTERFACEDECLARATION: {\r\n            this.initializeInterface(<InterfaceDeclaration>statement);\r\n            break;\r\n          }\r\n          case NodeKind.NAMESPACEDECLARATION: {\r\n            this.initializeNamespace(<NamespaceDeclaration>statement, queuedExtends, queuedImplements);\r\n            break;\r\n          }\r\n          case NodeKind.TYPEDECLARATION: {\r\n            this.initializeTypeAlias(<TypeDeclaration>statement);\r\n            break;\r\n          }\r\n          case NodeKind.VARIABLE: {\r\n            this.initializeVariables(<VariableStatement>statement);\r\n            break;\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    // queued imports should be resolvable now through traversing exports and queued exports\r\n    for (let i = 0; i < queuedImports.length;) {\r\n      let queuedImport = queuedImports[i];\r\n      let declaration = queuedImport.declaration;\r\n      if (declaration) { // named\r\n        let element = this.tryLocateImport(queuedImport.externalName, queuedExports);\r\n        if (element) {\r\n          this.elementsLookup.set(queuedImport.localName, element);\r\n          queuedImports.splice(i, 1);\r\n        } else {\r\n          if (element = this.tryLocateImport(queuedImport.externalNameAlt, queuedExports)) {\r\n            this.elementsLookup.set(queuedImport.localName, element);\r\n            queuedImports.splice(i, 1);\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Module_0_has_no_exported_member_1,\r\n              declaration.range,\r\n              (<ImportStatement>declaration.parent).path.value,\r\n              declaration.externalName.text\r\n            );\r\n            ++i;\r\n          }\r\n        }\r\n      } else { // filespace\r\n        let element = this.elementsLookup.get(queuedImport.externalName);\r\n        if (element) {\r\n          this.elementsLookup.set(queuedImport.localName, element);\r\n          queuedImports.splice(i, 1);\r\n        } else {\r\n          if (element = this.elementsLookup.get(queuedImport.externalNameAlt)) {\r\n            this.elementsLookup.set(queuedImport.localName, element);\r\n            queuedImports.splice(i, 1);\r\n          } else {\r\n            assert(false); // already reported by the parser not finding the file\r\n            ++i;\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    // queued exports should be resolvable now that imports are finalized\r\n    for (let [exportName, queuedExport] of queuedExports) {\r\n      let currentExport: QueuedExport | null = queuedExport; // nullable below\r\n      let element: Element | null;\r\n      do {\r\n        if (currentExport.isReExport) {\r\n          if (element = this.fileLevelExports.get(currentExport.externalName)) {\r\n            this.setExportAndCheckLibrary(\r\n              exportName,\r\n              element,\r\n              queuedExport.member.externalName\r\n            );\r\n            break;\r\n          }\r\n          currentExport = queuedExports.get(currentExport.externalName);\r\n          if (!currentExport) {\r\n            this.error(\r\n              DiagnosticCode.Module_0_has_no_exported_member_1,\r\n              queuedExport.member.externalName.range,\r\n              (<StringLiteralExpression>(<ExportStatement>queuedExport.member.parent).path).value,\r\n              queuedExport.member.externalName.text\r\n            );\r\n          }\r\n        } else {\r\n          if (\r\n            // normal export\r\n            (element = this.elementsLookup.get(currentExport.externalName)) ||\r\n            // library re-export\r\n            (element = this.elementsLookup.get(currentExport.member.name.text))\r\n          ) {\r\n            this.setExportAndCheckLibrary(\r\n              exportName,\r\n              element,\r\n              queuedExport.member.externalName\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Cannot_find_name_0,\r\n              queuedExport.member.range, queuedExport.member.name.text\r\n            );\r\n          }\r\n          break;\r\n        }\r\n      } while (currentExport);\r\n    }\r\n\r\n    // resolve base prototypes of derived classes\r\n    var resolver = this.resolver;\r\n    for (let i = 0, k = queuedExtends.length; i < k; ++i) {\r\n      let derivedPrototype = queuedExtends[i];\r\n      let derivedDeclaration = derivedPrototype.declaration;\r\n      let derivedType = assert(derivedDeclaration.extendsType);\r\n      let baseElement = resolver.resolveIdentifier(derivedType.name, null); // reports\r\n      if (!baseElement) continue;\r\n      if (baseElement.kind == ElementKind.CLASS_PROTOTYPE) {\r\n        let basePrototype = <ClassPrototype>baseElement;\r\n        derivedPrototype.basePrototype = basePrototype;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.A_class_may_only_extend_another_class,\r\n          derivedType.range\r\n        );\r\n      }\r\n    }\r\n\r\n    // set up global aliases\r\n    {\r\n      let globalAliases = options.globalAliases;\r\n      if (globalAliases) {\r\n        for (let [alias, name] of globalAliases) {\r\n          if (!name.length) continue; // explicitly disabled\r\n          let element = this.elementsLookup.get(name);\r\n          if (element) this.elementsLookup.set(alias, element);\r\n          else throw new Error(\"element not found: \" + name);\r\n        }\r\n      }\r\n    }\r\n\r\n    // register 'ArrayBuffer'\r\n    if (this.elementsLookup.has(\"ArrayBuffer\")) {\r\n      let element = assert(this.elementsLookup.get(\"ArrayBuffer\"));\r\n      assert(element.kind == ElementKind.CLASS_PROTOTYPE);\r\n      this.arrayBufferInstance = resolver.resolveClass(<ClassPrototype>element, null);\r\n    }\r\n\r\n    // register 'Array'\r\n    if (this.elementsLookup.has(\"Array\")) {\r\n      let element = assert(this.elementsLookup.get(\"Array\"));\r\n      assert(element.kind == ElementKind.CLASS_PROTOTYPE);\r\n      this.arrayPrototype = <ClassPrototype>element;\r\n    }\r\n\r\n    // register 'String'\r\n    if (this.elementsLookup.has(\"String\")) {\r\n      let element = assert(this.elementsLookup.get(\"String\"));\r\n      assert(element.kind == ElementKind.CLASS_PROTOTYPE);\r\n      let instance = resolver.resolveClass(<ClassPrototype>element, null);\r\n      if (instance) {\r\n        if (this.typesLookup.has(\"string\")) {\r\n          let declaration = (<ClassPrototype>element).declaration;\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, declaration.programLevelInternalName\r\n          );\r\n        } else {\r\n          this.stringInstance = instance;\r\n          this.typesLookup.set(\"string\", instance.type);\r\n        }\r\n      }\r\n    }\r\n\r\n    // register 'start'\r\n    {\r\n      let element = assert(this.elementsLookup.get(\"start\"));\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      this.startFunction = <FunctionPrototype>element;\r\n    }\r\n\r\n    // register 'main' if present\r\n    if (this.moduleLevelExports.has(\"main\")) {\r\n      let element = (<ModuleExport>this.moduleLevelExports.get(\"main\")).element;\r\n      if (\r\n        element.kind == ElementKind.FUNCTION_PROTOTYPE &&\r\n        !(<FunctionPrototype>element).isAny(CommonFlags.GENERIC | CommonFlags.AMBIENT)\r\n      ) {\r\n        (<FunctionPrototype>element).set(CommonFlags.MAIN);\r\n        this.mainFunction = <FunctionPrototype>element;\r\n      }\r\n    }\r\n\r\n    // register 'abort' if present\r\n    if (this.elementsLookup.has(\"abort\")) {\r\n      let element = <Element>this.elementsLookup.get(\"abort\");\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let instance = this.resolver.resolveFunction(<FunctionPrototype>element, null);\r\n      if (instance) this.abortInstance = instance;\r\n    }\r\n\r\n    // register 'memory.allocate' if present\r\n    if (this.elementsLookup.has(\"memory\")) {\r\n      let element = <Element>this.elementsLookup.get(\"memory\");\r\n      let members = element.members;\r\n      if (members) {\r\n        if (members.has(\"allocate\")) {\r\n          element = assert(members.get(\"allocate\"));\r\n          assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n          let instance = this.resolver.resolveFunction(<FunctionPrototype>element, null);\r\n          if (instance) this.memoryAllocateInstance = instance;\r\n        }\r\n      }\r\n    }\r\n\r\n    // register GC hooks if present\r\n    if (\r\n      this.elementsLookup.has(\"__gc_allocate\") &&\r\n      this.elementsLookup.has(\"__gc_link\") &&\r\n      this.elementsLookup.has(\"__gc_mark\")\r\n    ) {\r\n      // __gc_allocate(usize, (ref: usize) => void): usize\r\n      let element = <Element>this.elementsLookup.get(\"__gc_allocate\");\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let gcAllocateInstance = assert(this.resolver.resolveFunction(<FunctionPrototype>element, null));\r\n      let signature = gcAllocateInstance.signature;\r\n      assert(signature.parameterTypes.length == 2);\r\n      assert(signature.parameterTypes[0] == this.options.usizeType);\r\n      assert(signature.parameterTypes[1].signatureReference);\r\n      assert(signature.returnType == this.options.usizeType);\r\n\r\n      // __gc_link(usize, usize): void\r\n      element = <Element>this.elementsLookup.get(\"__gc_link\");\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let gcLinkInstance = assert(this.resolver.resolveFunction(<FunctionPrototype>element, null));\r\n      signature = gcLinkInstance.signature;\r\n      assert(signature.parameterTypes.length == 2);\r\n      assert(signature.parameterTypes[0] == this.options.usizeType);\r\n      assert(signature.parameterTypes[1] == this.options.usizeType);\r\n      assert(signature.returnType == Type.void);\r\n\r\n      // __gc_mark(usize): void\r\n      element = <Element>this.elementsLookup.get(\"__gc_mark\");\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let gcMarkInstance = assert(this.resolver.resolveFunction(<FunctionPrototype>element, null));\r\n      signature = gcMarkInstance.signature;\r\n      assert(signature.parameterTypes.length == 1);\r\n      assert(signature.parameterTypes[0] == this.options.usizeType);\r\n      assert(signature.returnType == Type.void);\r\n\r\n      this.gcAllocateInstance = gcAllocateInstance;\r\n      this.gcLinkInstance = gcLinkInstance;\r\n      this.gcMarkInstance = gcMarkInstance;\r\n      let gcHookOffset = 2 * options.usizeType.byteSize; // .next + .prev\r\n      this.gcHookOffset =  gcHookOffset;\r\n      this.gcHeaderSize = (gcHookOffset + 4 + 7) & ~7;   // + .hook index + alignment\r\n      this.hasGC = true;\r\n    }\r\n  }\r\n\r\n  /** Sets a constant integer value. */\r\n  setConstantInteger(globalName: string, type: Type, value: I64): void {\r\n    assert(type.is(TypeFlags.INTEGER));\r\n    this.elementsLookup.set(globalName,\r\n      new Global(this, globalName, globalName, type, null, DecoratorFlags.NONE)\r\n        .withConstantIntegerValue(value)\r\n    );\r\n  }\r\n\r\n  /** Sets a constant float value. */\r\n  setConstantFloat(globalName: string, type: Type, value: f64): void {\r\n    assert(type.is(TypeFlags.FLOAT));\r\n    this.elementsLookup.set(globalName,\r\n      new Global(this, globalName, globalName, type, null, DecoratorFlags.NONE)\r\n        .withConstantFloatValue(value)\r\n    );\r\n  }\r\n\r\n  /** Tries to locate an import by traversing exports and queued exports. */\r\n  private tryLocateImport(\r\n    externalName: string,\r\n    queuedNamedExports: Map<string,QueuedExport>\r\n  ): Element | null {\r\n    var element: Element | null;\r\n    var fileLevelExports = this.fileLevelExports;\r\n    do {\r\n      if (element = fileLevelExports.get(externalName)) return element;\r\n      let queuedExport = queuedNamedExports.get(externalName);\r\n      if (!queuedExport) break;\r\n      if (queuedExport.isReExport) {\r\n        externalName = queuedExport.externalName;\r\n        continue;\r\n      }\r\n      return this.elementsLookup.get(queuedExport.externalName);\r\n    } while (true);\r\n    return null;\r\n  }\r\n\r\n  /** Checks that only supported decorators are present. */\r\n  private checkDecorators(\r\n    decorators: DecoratorNode[],\r\n    acceptedFlags: DecoratorFlags\r\n  ): DecoratorFlags {\r\n    var presentFlags = DecoratorFlags.NONE;\r\n    for (let i = 0, k = decorators.length; i < k; ++i) {\r\n      let decorator = decorators[i];\r\n      let kind = decoratorNameToKind(decorator.name);\r\n      let flag = decoratorKindToFlag(kind);\r\n      if (flag) {\r\n        if (flag == DecoratorFlags.BUILTIN) {\r\n          if (decorator.range.source.isLibrary) {\r\n            presentFlags |= flag;\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Decorator_0_is_not_valid_here,\r\n              decorator.range, decorator.name.range.toString()\r\n            );\r\n          }\r\n        } else if (!(acceptedFlags & flag)) {\r\n          this.error(\r\n            DiagnosticCode.Decorator_0_is_not_valid_here,\r\n            decorator.range, decorator.name.range.toString()\r\n          );\r\n        } else if (presentFlags & flag) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_decorator,\r\n            decorator.range, decorator.name.range.toString()\r\n          );\r\n        } else {\r\n          presentFlags |= flag;\r\n        }\r\n      }\r\n    }\r\n    return presentFlags;\r\n  }\r\n\r\n  /** Checks and sets up global options of an element. */\r\n  private checkGlobal(\r\n    element: Element,\r\n    declaration: DeclarationStatement\r\n  ): void {\r\n    var parentNode = declaration.parent;\r\n    // alias globally if explicitly annotated @global or exported from a top-level library file\r\n    if (\r\n      (element.hasDecorator(DecoratorFlags.GLOBAL)) ||\r\n      (\r\n        declaration.range.source.isLibrary &&\r\n        element.is(CommonFlags.EXPORT) &&\r\n        (\r\n          assert(parentNode).kind == NodeKind.SOURCE ||\r\n          (\r\n            <Node>parentNode).kind == NodeKind.VARIABLE &&\r\n            assert((<Node>parentNode).parent).kind == NodeKind.SOURCE\r\n          )\r\n        )\r\n    ) {\r\n      let globalName = declaration.programLevelInternalName;\r\n      if (this.elementsLookup.has(globalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, element.internalName\r\n        );\r\n      } else {\r\n        this.elementsLookup.set(globalName, element);\r\n      }\r\n    }\r\n    // builtins use the global name directly\r\n    if (element.hasDecorator(DecoratorFlags.BUILTIN)) {\r\n      element.internalName = declaration.programLevelInternalName;\r\n    }\r\n  }\r\n\r\n  /** Initializes a class declaration. */\r\n  private initializeClass(\r\n    declaration: ClassDeclaration,\r\n    queuedExtends: ClassPrototype[],\r\n    queuedImplements: ClassPrototype[],\r\n    namespace: Element | null = null\r\n  ): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(internalName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, internalName\r\n      );\r\n      return;\r\n    }\r\n\r\n    var decorators = declaration.decorators;\r\n    var simpleName = declaration.name.text;\r\n    var prototype = new ClassPrototype(\r\n      this,\r\n      simpleName,\r\n      internalName,\r\n      declaration,\r\n      decorators\r\n        ? this.checkDecorators(decorators,\r\n            DecoratorFlags.GLOBAL |\r\n            DecoratorFlags.SEALED |\r\n            DecoratorFlags.UNMANAGED\r\n          )\r\n        : DecoratorFlags.NONE\r\n    );\r\n    prototype.parent = namespace;\r\n    this.elementsLookup.set(internalName, prototype);\r\n\r\n    var implementsTypes = declaration.implementsTypes;\r\n    if (implementsTypes) {\r\n      let numImplementsTypes = implementsTypes.length;\r\n      if (prototype.hasDecorator(DecoratorFlags.UNMANAGED)) {\r\n        if (numImplementsTypes) {\r\n          this.error(\r\n            DiagnosticCode.Unmanaged_classes_cannot_implement_interfaces,\r\n            Range.join(\r\n              declaration.name.range,\r\n              implementsTypes[numImplementsTypes - 1].range\r\n            )\r\n          );\r\n        }\r\n\r\n      // remember classes that implement interfaces\r\n      } else if (numImplementsTypes) {\r\n        for (let i = 0; i < numImplementsTypes; ++i) {\r\n          this.warning( // TODO\r\n            DiagnosticCode.Operation_not_supported,\r\n            implementsTypes[i].range\r\n          );\r\n        }\r\n        queuedImplements.push(prototype);\r\n      }\r\n    }\r\n\r\n    // remember classes that extend another one\r\n    if (declaration.extendsType) queuedExtends.push(prototype);\r\n\r\n    // add as namespace member if applicable\r\n    if (namespace) {\r\n      if (namespace.members) {\r\n        if (namespace.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        namespace.members = new Map();\r\n      }\r\n      namespace.members.set(simpleName, prototype);\r\n      if (namespace.is(CommonFlags.MODULE_EXPORT) && prototype.is(CommonFlags.EXPORT)) {\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n\r\n    // otherwise add to file-level exports if exported\r\n    } else if (prototype.is(CommonFlags.EXPORT)) {\r\n      if (this.fileLevelExports.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      this.fileLevelExports.set(internalName, prototype);\r\n      this.currentFilespace.members.set(simpleName, prototype);\r\n      if (prototype.is(CommonFlags.EXPORT) && declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          this.error(\r\n            DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n            declaration.name.range, existingExport.element.internalName\r\n          );\r\n          return;\r\n        }\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n          element: prototype,\r\n          identifier: declaration.name\r\n        });\r\n      }\r\n    }\r\n\r\n    // initialize members\r\n    var memberDeclarations = declaration.members;\r\n    for (let i = 0, k = memberDeclarations.length; i < k; ++i) {\r\n      let memberDeclaration = memberDeclarations[i];\r\n      switch (memberDeclaration.kind) {\r\n        case NodeKind.FIELDDECLARATION: {\r\n          this.initializeField(<FieldDeclaration>memberDeclaration, prototype);\r\n          break;\r\n        }\r\n        case NodeKind.METHODDECLARATION: {\r\n          if (memberDeclaration.isAny(CommonFlags.GET | CommonFlags.SET)) {\r\n            this.initializeAccessor(<MethodDeclaration>memberDeclaration, prototype);\r\n          } else {\r\n            this.initializeMethod(<MethodDeclaration>memberDeclaration, prototype);\r\n          }\r\n          break;\r\n        }\r\n        default: {\r\n          assert(false); // should have been reported while parsing\r\n          return;\r\n        }\r\n      }\r\n    }\r\n\r\n    this.checkGlobal(prototype, declaration);\r\n  }\r\n\r\n  /** Initializes a field of a class or interface. */\r\n  private initializeField(\r\n    declaration: FieldDeclaration,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    var name = declaration.name.text;\r\n    var internalName = declaration.fileLevelInternalName;\r\n    var decorators = declaration.decorators;\r\n    var isInterface = classPrototype.kind == ElementKind.INTERFACE_PROTOTYPE;\r\n\r\n    // static fields become global variables\r\n    if (declaration.is(CommonFlags.STATIC)) {\r\n      if (isInterface) {\r\n        // should have been reported while parsing\r\n        assert(false);\r\n      }\r\n      if (this.elementsLookup.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      if (classPrototype.members) {\r\n        if (classPrototype.members.has(name)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.members = new Map();\r\n      }\r\n      let staticField = new Global(\r\n        this,\r\n        name,\r\n        internalName,\r\n        Type.void, // resolved later on\r\n        declaration,\r\n        decorators\r\n          ? this.checkDecorators(decorators, DecoratorFlags.INLINE)\r\n          : DecoratorFlags.NONE\r\n      );\r\n      staticField.parent = classPrototype;\r\n      classPrototype.members.set(name, staticField);\r\n      this.elementsLookup.set(internalName, staticField);\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        staticField.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n\r\n      if (staticField.hasDecorator(DecoratorFlags.INLINE) && !staticField.is(CommonFlags.READONLY)) {\r\n        this.error(\r\n          DiagnosticCode.Decorator_0_is_not_valid_here,\r\n          assert(findDecorator(DecoratorKind.INLINE, decorators)).range, \"inline\"\r\n        );\r\n      }\r\n\r\n    // instance fields are remembered until resolved\r\n    } else {\r\n      if (isInterface) {\r\n        // should have been reported while parsing\r\n        assert(!declaration.isAny(CommonFlags.ABSTRACT | CommonFlags.GET | CommonFlags.SET));\r\n      }\r\n      if (classPrototype.instanceMembers) {\r\n        if (classPrototype.instanceMembers.has(name)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.instanceMembers = new Map();\r\n      }\r\n      let instanceField = new FieldPrototype(\r\n        classPrototype,\r\n        name,\r\n        internalName,\r\n        declaration\r\n      );\r\n      if (decorators) this.checkDecorators(decorators, DecoratorFlags.NONE);\r\n      classPrototype.instanceMembers.set(name, instanceField);\r\n    }\r\n  }\r\n\r\n  /** Initializes a method of a class or interface. */\r\n  private initializeMethod(\r\n    declaration: MethodDeclaration,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    var simpleName = declaration.name.text;\r\n    var internalName = declaration.fileLevelInternalName;\r\n    var prototype: FunctionPrototype | null = null;\r\n\r\n    var decorators = declaration.decorators;\r\n    var decoratorFlags = DecoratorFlags.NONE;\r\n    if (decorators) {\r\n      decoratorFlags = this.checkDecorators(decorators,\r\n        DecoratorFlags.OPERATOR_BINARY  |\r\n        DecoratorFlags.OPERATOR_PREFIX  |\r\n        DecoratorFlags.OPERATOR_POSTFIX |\r\n        DecoratorFlags.INLINE\r\n      );\r\n    }\r\n\r\n    // static methods become global functions\r\n    if (declaration.is(CommonFlags.STATIC)) {\r\n      assert(declaration.name.kind != NodeKind.CONSTRUCTOR);\r\n\r\n      if (this.elementsLookup.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0, declaration.name.range,\r\n          internalName\r\n        );\r\n        return;\r\n      }\r\n      if (classPrototype.members) {\r\n        if (classPrototype.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.members = new Map();\r\n      }\r\n      prototype = new FunctionPrototype(\r\n        this,\r\n        simpleName,\r\n        internalName,\r\n        declaration,\r\n        classPrototype,\r\n        decoratorFlags\r\n      );\r\n      classPrototype.members.set(simpleName, prototype);\r\n      this.elementsLookup.set(internalName, prototype);\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n\r\n    // instance methods are remembered until resolved\r\n    } else {\r\n      if (classPrototype.instanceMembers) {\r\n        if (classPrototype.instanceMembers.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.instanceMembers = new Map();\r\n      }\r\n      prototype = new FunctionPrototype(\r\n        this,\r\n        simpleName,\r\n        internalName,\r\n        declaration,\r\n        classPrototype,\r\n        decoratorFlags\r\n      );\r\n      // if (classPrototype.isUnmanaged && instancePrototype.isAbstract) {\r\n      //   this.error( Unmanaged classes cannot declare abstract methods. );\r\n      // }\r\n      if (declaration.name.kind == NodeKind.CONSTRUCTOR) {\r\n        if (classPrototype.constructorPrototype) {\r\n          this.error(\r\n            DiagnosticCode.Multiple_constructor_implementations_are_not_allowed,\r\n            declaration.name.range\r\n          );\r\n        } else {\r\n          prototype.set(CommonFlags.CONSTRUCTOR);\r\n          classPrototype.constructorPrototype = prototype;\r\n        }\r\n      } else {\r\n        classPrototype.instanceMembers.set(simpleName, prototype);\r\n      }\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    }\r\n\r\n    this.checkOperatorOverloads(declaration.decorators, prototype, classPrototype);\r\n  }\r\n\r\n  private checkOperatorOverloads(\r\n    decorators: DecoratorNode[] | null,\r\n    prototype: FunctionPrototype,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    if (decorators) {\r\n      for (let i = 0, k = decorators.length; i < k; ++i) {\r\n        let decorator = decorators[i];\r\n        switch (decorator.decoratorKind) {\r\n          case DecoratorKind.OPERATOR:\r\n          case DecoratorKind.OPERATOR_BINARY:\r\n          case DecoratorKind.OPERATOR_PREFIX:\r\n          case DecoratorKind.OPERATOR_POSTFIX: {\r\n            let numArgs = decorator.arguments && decorator.arguments.length || 0;\r\n            if (numArgs == 1) {\r\n              let firstArg = (<Expression[]>decorator.arguments)[0];\r\n              if (\r\n                firstArg.kind == NodeKind.LITERAL &&\r\n                (<LiteralExpression>firstArg).literalKind == LiteralKind.STRING\r\n              ) {\r\n                let kind = operatorKindFromDecorator(\r\n                  decorator.decoratorKind,\r\n                  (<StringLiteralExpression>firstArg).value\r\n                );\r\n                if (kind == OperatorKind.INVALID) {\r\n                  this.error(\r\n                    DiagnosticCode.Operation_not_supported,\r\n                    firstArg.range\r\n                  );\r\n                } else {\r\n                  let overloads = classPrototype.overloadPrototypes;\r\n                  if (overloads.has(kind)) {\r\n                    this.error(\r\n                      DiagnosticCode.Duplicate_function_implementation,\r\n                      firstArg.range\r\n                    );\r\n                  } else {\r\n                    prototype.operatorKind = kind;\r\n                    overloads.set(kind, prototype);\r\n                  }\r\n                }\r\n              } else {\r\n                this.error(\r\n                  DiagnosticCode.String_literal_expected,\r\n                  firstArg.range\r\n                );\r\n              }\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode.Expected_0_arguments_but_got_1,\r\n                decorator.range, \"1\", numArgs.toString(0)\r\n              );\r\n            }\r\n          }\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  private initializeAccessor(\r\n    declaration: MethodDeclaration,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    var simpleName = declaration.name.text;\r\n    var internalPropertyName = declaration.fileLevelInternalName;\r\n    var propertyElement = this.elementsLookup.get(internalPropertyName);\r\n    var isGetter = declaration.is(CommonFlags.GET);\r\n    var isNew = false;\r\n    if (propertyElement) {\r\n      if (\r\n        propertyElement.kind != ElementKind.PROPERTY ||\r\n        (isGetter\r\n          ? (<Property>propertyElement).getterPrototype\r\n          : (<Property>propertyElement).setterPrototype\r\n        ) != null\r\n      ) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, internalPropertyName\r\n        );\r\n        return;\r\n      }\r\n    } else {\r\n      propertyElement = new Property(\r\n        this,\r\n        simpleName,\r\n        internalPropertyName,\r\n        classPrototype\r\n      );\r\n      isNew = true;\r\n    }\r\n\r\n    var decorators = declaration.decorators;\r\n    var decoratorFlags = DecoratorFlags.NONE;\r\n    if (decorators) {\r\n      decoratorFlags = this.checkDecorators(decorators,\r\n        DecoratorFlags.INLINE\r\n      );\r\n    }\r\n\r\n    var baseName = (isGetter ? GETTER_PREFIX : SETTER_PREFIX) + simpleName;\r\n\r\n    // static accessors become global functions\r\n    if (declaration.is(CommonFlags.STATIC)) {\r\n      let staticName = classPrototype.internalName + STATIC_DELIMITER + baseName;\r\n      if (this.elementsLookup.has(staticName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, staticName\r\n        );\r\n        return;\r\n      }\r\n      let staticPrototype = new FunctionPrototype(\r\n        this,\r\n        baseName,\r\n        staticName,\r\n        declaration,\r\n        null,\r\n        decoratorFlags\r\n      );\r\n      if (isGetter) {\r\n        (<Property>propertyElement).getterPrototype = staticPrototype;\r\n      } else {\r\n        (<Property>propertyElement).setterPrototype = staticPrototype;\r\n      }\r\n      if (isNew) {\r\n        if (classPrototype.members) {\r\n          if (classPrototype.members.has(simpleName)) {\r\n            this.error(\r\n              DiagnosticCode.Duplicate_identifier_0,\r\n              declaration.name.range, staticName\r\n            );\r\n            return;\r\n          }\r\n        } else {\r\n          classPrototype.members = new Map();\r\n        }\r\n        classPrototype.members.set(simpleName, propertyElement); // check above\r\n      } else {\r\n        assert(classPrototype.members && classPrototype.members.has(simpleName));\r\n      }\r\n      this.elementsLookup.set(internalPropertyName, propertyElement);\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        propertyElement.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n\r\n    // instance accessors are remembered until resolved\r\n    } else {\r\n      let instanceName = classPrototype.internalName + INSTANCE_DELIMITER + baseName;\r\n      if (classPrototype.instanceMembers) {\r\n        if (classPrototype.instanceMembers.has(baseName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalPropertyName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.instanceMembers = new Map();\r\n      }\r\n      let instancePrototype = new FunctionPrototype(\r\n        this,\r\n        baseName,\r\n        instanceName,\r\n        declaration,\r\n        classPrototype,\r\n        decoratorFlags\r\n      );\r\n      if (isGetter) {\r\n        (<Property>propertyElement).getterPrototype = instancePrototype;\r\n      } else {\r\n        (<Property>propertyElement).setterPrototype = instancePrototype;\r\n      }\r\n      classPrototype.instanceMembers.set(baseName, propertyElement);\r\n      this.elementsLookup.set(internalPropertyName, propertyElement);\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        propertyElement.set(CommonFlags.MODULE_EXPORT);\r\n        instancePrototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    }\r\n  }\r\n\r\n  private initializeEnum(\r\n    declaration: EnumDeclaration,\r\n    namespace: Element | null = null\r\n  ): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(internalName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, internalName\r\n      );\r\n      return;\r\n    }\r\n    var simpleName = declaration.name.text;\r\n    var element = new Enum(this, simpleName, internalName, declaration);\r\n    element.parent = namespace;\r\n    this.elementsLookup.set(internalName, element);\r\n\r\n    if (namespace) {\r\n      if (namespace.members) {\r\n        if (namespace.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        namespace.members = new Map();\r\n      }\r\n      namespace.members.set(simpleName, element);\r\n      if (namespace.is(CommonFlags.MODULE_EXPORT) && element.is(CommonFlags.EXPORT)) {\r\n        element.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    } else if (element.is(CommonFlags.EXPORT)) { // no namespace\r\n      if (this.fileLevelExports.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      this.fileLevelExports.set(internalName, element);\r\n      this.currentFilespace.members.set(simpleName, element);\r\n      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          this.error(\r\n            DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n            declaration.name.range, existingExport.element.internalName\r\n          );\r\n          return;\r\n        }\r\n        element.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n          element,\r\n          identifier: declaration.name\r\n        });\r\n      }\r\n    }\r\n\r\n    var values = declaration.values;\r\n    for (let i = 0, k = values.length; i < k; ++i) {\r\n      this.initializeEnumValue(values[i], element);\r\n    }\r\n\r\n    this.checkGlobal(element, declaration);\r\n  }\r\n\r\n  private initializeEnumValue(\r\n    declaration: EnumValueDeclaration,\r\n    enm: Enum\r\n  ): void {\r\n    var name = declaration.name.text;\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (enm.members) {\r\n      if (enm.members.has(name)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n    } else {\r\n      enm.members = new Map();\r\n    }\r\n    var value = new EnumValue(enm, this, name, internalName, declaration);\r\n    enm.members.set(name, value);\r\n    if (enm.is(CommonFlags.MODULE_EXPORT)) {\r\n      value.set(CommonFlags.MODULE_EXPORT);\r\n    }\r\n  }\r\n\r\n  private initializeExports(\r\n    statement: ExportStatement,\r\n    queuedExports: Map<string,QueuedExport>\r\n  ): void {\r\n    var members = statement.members;\r\n    if (members) { // named\r\n      for (let i = 0, k = members.length; i < k; ++i) {\r\n        this.initializeExport(members[i], statement.internalPath, queuedExports);\r\n      }\r\n    } else { // TODO: filespace\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        statement.range\r\n      );\r\n    }\r\n  }\r\n\r\n  private setExportAndCheckLibrary(\r\n    internalName: string,\r\n    element: Element,\r\n    externalIdentifier: IdentifierExpression\r\n  ): void {\r\n    // add to file-level exports\r\n    this.fileLevelExports.set(internalName, element);\r\n\r\n    // add to filespace\r\n    var internalPath = externalIdentifier.range.source.internalPath;\r\n    var prefix = FILESPACE_PREFIX + internalPath;\r\n    var filespace = this.elementsLookup.get(prefix);\r\n    if (!filespace) filespace = assert(this.elementsLookup.get(prefix + PATH_DELIMITER + \"index\"));\r\n    assert(filespace.kind == ElementKind.FILESPACE);\r\n    var simpleName = externalIdentifier.text;\r\n    (<Filespace>filespace).members.set(simpleName, element);\r\n\r\n    // add global alias if a top-level export of a library file\r\n    var source = externalIdentifier.range.source;\r\n    if (source.isLibrary) {\r\n      if (this.elementsLookup.has(simpleName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          externalIdentifier.range, simpleName\r\n        );\r\n      } else {\r\n        element.internalName = simpleName;\r\n        this.elementsLookup.set(simpleName, element);\r\n      }\r\n\r\n    // add module level export if a top-level export of an entry file\r\n    } else if (source.isEntry) {\r\n      this.moduleLevelExports.set(externalIdentifier.text, <ModuleExport>{\r\n        element,\r\n        identifier: externalIdentifier\r\n      });\r\n    }\r\n  }\r\n\r\n  private initializeExport(\r\n    member: ExportMember,\r\n    internalPath: string | null,\r\n    queuedExports: Map<string,QueuedExport>\r\n  ): void {\r\n    var externalName = member.range.source.internalPath + PATH_DELIMITER + member.externalName.text;\r\n    if (this.fileLevelExports.has(externalName)) {\r\n      this.error(\r\n        DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n        member.externalName.range, externalName\r\n      );\r\n      return;\r\n    }\r\n    var referencedName: string;\r\n    var referencedElement: Element | null;\r\n    var queuedExport: QueuedExport | null;\r\n\r\n    // export local element\r\n    if (internalPath == null) {\r\n      referencedName = member.range.source.internalPath + PATH_DELIMITER + member.name.text;\r\n\r\n      // resolve right away if the element exists\r\n      if (this.elementsLookup.has(referencedName)) {\r\n        this.setExportAndCheckLibrary(\r\n          externalName,\r\n          <Element>this.elementsLookup.get(referencedName),\r\n          member.externalName\r\n        );\r\n        return;\r\n      }\r\n\r\n      // otherwise queue it\r\n      if (queuedExports.has(externalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          member.externalName.range, externalName\r\n        );\r\n        return;\r\n      }\r\n      queuedExport = new QueuedExport();\r\n      queuedExport.isReExport = false;\r\n      queuedExport.externalName = referencedName; // -> here: local name\r\n      queuedExport.member = member;\r\n      queuedExports.set(externalName, queuedExport);\r\n\r\n    // export external element\r\n    } else {\r\n      referencedName = internalPath + PATH_DELIMITER + member.name.text;\r\n\r\n      // resolve right away if the export exists\r\n      referencedElement = this.elementsLookup.get(referencedName);\r\n      if (referencedElement) {\r\n        this.setExportAndCheckLibrary(\r\n          externalName,\r\n          referencedElement,\r\n          member.externalName\r\n        );\r\n        return;\r\n      }\r\n\r\n      // walk already known queued exports\r\n      let seen = new Set<QueuedExport>();\r\n      while (queuedExport = queuedExports.get(referencedName)) {\r\n        if (queuedExport.isReExport) {\r\n          referencedElement = this.fileLevelExports.get(queuedExport.externalName);\r\n          if (referencedElement) {\r\n            this.setExportAndCheckLibrary(\r\n              externalName,\r\n              referencedElement,\r\n              member.externalName\r\n            );\r\n            return;\r\n          }\r\n          referencedName = queuedExport.externalName;\r\n          if (seen.has(queuedExport)) break;\r\n          seen.add(queuedExport);\r\n        } else {\r\n          referencedElement = this.elementsLookup.get(queuedExport.externalName);\r\n          if (referencedElement) {\r\n            this.setExportAndCheckLibrary(\r\n              externalName,\r\n              referencedElement,\r\n              member.externalName\r\n            );\r\n            return;\r\n          }\r\n          break;\r\n        }\r\n      }\r\n\r\n      // otherwise queue it\r\n      if (queuedExports.has(externalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          member.externalName.range, externalName\r\n        );\r\n        return;\r\n      }\r\n      queuedExport = new QueuedExport();\r\n      queuedExport.isReExport = true;\r\n      queuedExport.externalName = referencedName; // -> here: external name\r\n      queuedExport.member = member;\r\n      queuedExports.set(externalName, queuedExport);\r\n    }\r\n  }\r\n\r\n  private initializeFunction(\r\n    declaration: FunctionDeclaration,\r\n    namespace: Element | null = null\r\n  ): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(internalName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, internalName\r\n      );\r\n      return;\r\n    }\r\n    var simpleName = declaration.name.text;\r\n    var decorators = declaration.decorators;\r\n    var prototype = new FunctionPrototype(\r\n      this,\r\n      simpleName,\r\n      internalName,\r\n      declaration,\r\n      null,\r\n      decorators\r\n        ? this.checkDecorators(decorators,\r\n            DecoratorFlags.GLOBAL |\r\n            DecoratorFlags.INLINE |\r\n            DecoratorFlags.EXTERNAL\r\n          )\r\n        : DecoratorFlags.NONE\r\n    );\r\n    prototype.parent = namespace;\r\n    this.elementsLookup.set(internalName, prototype);\r\n\r\n    if (namespace) {\r\n      if (namespace.members) {\r\n        if (namespace.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        namespace.members = new Map();\r\n      }\r\n      namespace.members.set(simpleName, prototype);\r\n      if (namespace.is(CommonFlags.MODULE_EXPORT) && prototype.is(CommonFlags.EXPORT)) {\r\n        prototype.parent = namespace;\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    } else if (prototype.is(CommonFlags.EXPORT)) { // no namespace\r\n      if (this.fileLevelExports.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      this.fileLevelExports.set(internalName, prototype);\r\n      this.currentFilespace.members.set(simpleName, prototype);\r\n      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, existingExport.element.internalName\r\n          );\r\n          return;\r\n        }\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n          element: prototype,\r\n          identifier: declaration.name\r\n        });\r\n      }\r\n    }\r\n\r\n    this.checkGlobal(prototype, declaration);\r\n  }\r\n\r\n  private initializeImports(\r\n    statement: ImportStatement,\r\n    queuedExports: Map<string,QueuedExport>,\r\n    queuedImports: QueuedImport[]\r\n  ): void {\r\n    var declarations = statement.declarations;\r\n    if (declarations) {\r\n      for (let i = 0, k = declarations.length; i < k; ++i) {\r\n        this.initializeImport(\r\n          declarations[i],\r\n          statement.internalPath,\r\n          queuedExports, queuedImports\r\n        );\r\n      }\r\n    } else if (statement.namespaceName) { // import * as simpleName from \"file\"\r\n      let simpleName = statement.namespaceName.text;\r\n      let internalName = (\r\n        statement.range.source.internalPath +\r\n        PATH_DELIMITER +\r\n        simpleName\r\n      );\r\n      if (this.elementsLookup.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          statement.namespaceName.range,\r\n          internalName\r\n        );\r\n        return;\r\n      }\r\n\r\n      // resolve right away if the exact filespace exists\r\n      let filespace = this.elementsLookup.get(statement.internalPath);\r\n      if (filespace) {\r\n        this.elementsLookup.set(internalName, filespace);\r\n        return;\r\n      }\r\n\r\n      // otherwise queue it\r\n      let queuedImport = new QueuedImport();\r\n      queuedImport.localName = internalName;\r\n      let externalName = FILESPACE_PREFIX + statement.internalPath;\r\n      queuedImport.externalName = externalName;\r\n      queuedImport.externalNameAlt = externalName + PATH_DELIMITER + \"index\";\r\n      queuedImport.declaration = null; // filespace\r\n      queuedImports.push(queuedImport);\r\n    }\r\n  }\r\n\r\n  private initializeImport(\r\n    declaration: ImportDeclaration,\r\n    internalPath: string,\r\n    queuedNamedExports: Map<string,QueuedExport>,\r\n    queuedImports: QueuedImport[]\r\n  ): void {\r\n    var localName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(localName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, localName\r\n      );\r\n      return;\r\n    }\r\n\r\n    var externalName = internalPath + PATH_DELIMITER + declaration.externalName.text;\r\n\r\n    // resolve right away if the exact export exists\r\n    var element: Element | null;\r\n    if (element = this.fileLevelExports.get(externalName)) {\r\n      this.elementsLookup.set(localName, element);\r\n      return;\r\n    }\r\n\r\n    // otherwise queue it\r\n    const indexPart = PATH_DELIMITER + \"index\";\r\n    var queuedImport = new QueuedImport();\r\n    queuedImport.localName = localName;\r\n    if (internalPath.endsWith(indexPart)) {\r\n      queuedImport.externalName = externalName; // try exact first\r\n      queuedImport.externalNameAlt = (\r\n        internalPath.substring(0, internalPath.length - indexPart.length + 1) +\r\n        declaration.externalName.text\r\n      );\r\n    } else {\r\n      queuedImport.externalName = externalName; // try exact first\r\n      queuedImport.externalNameAlt = (\r\n        internalPath +\r\n        indexPart +\r\n        PATH_DELIMITER +\r\n        declaration.externalName.text\r\n      );\r\n    }\r\n    queuedImport.declaration = declaration; // named\r\n    queuedImports.push(queuedImport);\r\n  }\r\n\r\n  private initializeInterface(declaration: InterfaceDeclaration, namespace: Element | null = null): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(internalName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, internalName\r\n      );\r\n      return;\r\n    }\r\n\r\n    var decorators = declaration.decorators;\r\n    var simpleName = declaration.name.text;\r\n    var prototype = new InterfacePrototype(\r\n      this,\r\n      simpleName,\r\n      internalName,\r\n      declaration,\r\n      decorators\r\n        ? this.checkDecorators(decorators, DecoratorFlags.GLOBAL)\r\n        : DecoratorFlags.NONE\r\n    );\r\n    prototype.parent = namespace;\r\n    this.elementsLookup.set(internalName, prototype);\r\n\r\n    if (namespace) {\r\n      if (namespace.members) {\r\n        if (namespace.members.has(prototype.internalName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        namespace.members = new Map();\r\n      }\r\n      namespace.members.set(prototype.internalName, prototype);\r\n      if (namespace.is(CommonFlags.MODULE_EXPORT) && prototype.is(CommonFlags.EXPORT)) {\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    } else if (prototype.is(CommonFlags.EXPORT)) { // no namespace\r\n      if (this.fileLevelExports.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      this.fileLevelExports.set(internalName, prototype);\r\n      this.currentFilespace.members.set(simpleName, prototype);\r\n      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, existingExport.element.internalName\r\n          );\r\n          return;\r\n        }\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n          element: prototype,\r\n          identifier: declaration.name\r\n        });\r\n      }\r\n    }\r\n\r\n    var memberDeclarations = declaration.members;\r\n    for (let i = 0, k = memberDeclarations.length; i < k; ++i) {\r\n      let memberDeclaration = memberDeclarations[i];\r\n      switch (memberDeclaration.kind) {\r\n\r\n        case NodeKind.FIELDDECLARATION: {\r\n          this.initializeField(<FieldDeclaration>memberDeclaration, prototype);\r\n          break;\r\n        }\r\n        case NodeKind.METHODDECLARATION: {\r\n          if (memberDeclaration.isAny(CommonFlags.GET | CommonFlags.SET)) {\r\n            this.initializeAccessor(<MethodDeclaration>memberDeclaration, prototype);\r\n          } else {\r\n            this.initializeMethod(<MethodDeclaration>memberDeclaration, prototype);\r\n          }\r\n          break;\r\n        }\r\n        default: {\r\n          throw new Error(\"interface member expected\");\r\n        }\r\n      }\r\n    }\r\n\r\n    this.checkGlobal(prototype, declaration);\r\n  }\r\n\r\n  private initializeNamespace(\r\n    declaration: NamespaceDeclaration,\r\n    queuedExtends: ClassPrototype[],\r\n    queuedImplements: ClassPrototype[],\r\n    parentNamespace: Element | null = null\r\n  ): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    var simpleName = declaration.name.text;\r\n    var namespace = this.elementsLookup.get(internalName);\r\n    if (!namespace) {\r\n      namespace = new Namespace(this, simpleName, internalName, declaration);\r\n      namespace.parent = parentNamespace;\r\n      this.elementsLookup.set(internalName, namespace);\r\n      this.checkGlobal(namespace, declaration);\r\n    }\r\n\r\n    if (parentNamespace) {\r\n      if (parentNamespace.members) {\r\n        if (parentNamespace.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        parentNamespace.members = new Map();\r\n      }\r\n      parentNamespace.members.set(simpleName, namespace);\r\n      if (parentNamespace.is(CommonFlags.MODULE_EXPORT) && namespace.is(CommonFlags.EXPORT)) {\r\n        namespace.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    } else if (namespace.is(CommonFlags.EXPORT)) { // no parent namespace\r\n      let existingExport = this.fileLevelExports.get(internalName);\r\n      if (existingExport) {\r\n        if (!existingExport.is(CommonFlags.EXPORT)) {\r\n          this.error(\r\n            DiagnosticCode.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local,\r\n            declaration.name.range, namespace.internalName\r\n          ); // recoverable\r\n        }\r\n        namespace = existingExport; // join\r\n      } else {\r\n        this.fileLevelExports.set(internalName, namespace);\r\n      }\r\n      this.currentFilespace.members.set(simpleName, namespace);\r\n      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          if (existingExport.element !== namespace) { // not merged\r\n            this.error(\r\n              DiagnosticCode.Duplicate_identifier_0,\r\n              declaration.name.range, existingExport.element.internalName\r\n            );\r\n            return;\r\n          }\r\n        } else {\r\n          this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n            element: namespace,\r\n            identifier: declaration.name\r\n          });\r\n        }\r\n        namespace.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    }\r\n\r\n    var members = declaration.members;\r\n    for (let i = 0, k = members.length; i < k; ++i) {\r\n      switch (members[i].kind) {\r\n        case NodeKind.CLASSDECLARATION: {\r\n          this.initializeClass(<ClassDeclaration>members[i], queuedExtends, queuedImplements, namespace);\r\n          break;\r\n        }\r\n        case NodeKind.ENUMDECLARATION: {\r\n          this.initializeEnum(<EnumDeclaration>members[i], namespace);\r\n          break;\r\n        }\r\n        case NodeKind.FUNCTIONDECLARATION: {\r\n          this.initializeFunction(<FunctionDeclaration>members[i], namespace);\r\n          break;\r\n        }\r\n        case NodeKind.INTERFACEDECLARATION: {\r\n          this.initializeInterface(<InterfaceDeclaration>members[i], namespace);\r\n          break;\r\n        }\r\n        case NodeKind.NAMESPACEDECLARATION: {\r\n          this.initializeNamespace(<NamespaceDeclaration>members[i], queuedExtends, queuedImplements, namespace);\r\n          break;\r\n        }\r\n        case NodeKind.TYPEDECLARATION: {\r\n          // this.initializeTypeAlias(<TypeDeclaration>members[i], namespace);\r\n          // TODO: what about namespaced types?\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            members[i].range\r\n          );\r\n          break;\r\n        }\r\n        case NodeKind.VARIABLE: {\r\n          this.initializeVariables(<VariableStatement>members[i], namespace);\r\n          break;\r\n        }\r\n        default: {\r\n          throw new Error(\"namespace member expected\");\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  private initializeTypeAlias(declaration: TypeDeclaration, namespace: Element | null = null): void {\r\n    // type aliases are program globals\r\n    // TODO: what about namespaced types?\r\n    var name = declaration.name.text;\r\n    if (this.typesLookup.has(name) || this.typeAliases.has(name)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, name\r\n      );\r\n      return;\r\n    }\r\n    var alias = new TypeAlias();\r\n    alias.typeParameters = declaration.typeParameters;\r\n    alias.type = declaration.type;\r\n    this.typeAliases.set(name, alias);\r\n  }\r\n\r\n  private initializeVariables(statement: VariableStatement, namespace: Element | null = null): void {\r\n    var declarations = statement.declarations;\r\n    for (let i = 0, k = declarations.length; i < k; ++i) {\r\n      let declaration = declarations[i];\r\n      let decorators = declaration.decorators;\r\n      let internalName = declaration.fileLevelInternalName;\r\n      if (this.elementsLookup.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        continue;\r\n      }\r\n      let simpleName = declaration.name.text;\r\n      let global = new Global(\r\n        this,\r\n        simpleName,\r\n        internalName,\r\n        Type.void, // resolved later on\r\n        declaration,\r\n        decorators\r\n          ? this.checkDecorators(decorators,\r\n              DecoratorFlags.GLOBAL |\r\n              DecoratorFlags.INLINE |\r\n              DecoratorFlags.EXTERNAL\r\n            )\r\n          : DecoratorFlags.NONE\r\n      );\r\n      global.parent = namespace;\r\n      this.elementsLookup.set(internalName, global);\r\n\r\n      if (global.hasDecorator(DecoratorFlags.INLINE) && !global.is(CommonFlags.CONST)) {\r\n        this.error(\r\n          DiagnosticCode.Decorator_0_is_not_valid_here,\r\n          assert(findDecorator(DecoratorKind.INLINE, decorators)).range, \"inline\"\r\n        );\r\n      }\r\n\r\n      if (namespace) {\r\n        if (namespace.members) {\r\n          if (namespace.members.has(simpleName)) {\r\n            this.error(\r\n              DiagnosticCode.Duplicate_identifier_0,\r\n              declaration.name.range, internalName\r\n            );\r\n            continue;\r\n          }\r\n        } else {\r\n          namespace.members = new Map();\r\n        }\r\n        namespace.members.set(simpleName, global);\r\n        if (namespace.is(CommonFlags.MODULE_EXPORT) && global.is(CommonFlags.EXPORT)) {\r\n          global.set(CommonFlags.MODULE_EXPORT);\r\n        }\r\n      } else if (global.is(CommonFlags.EXPORT)) { // no namespace\r\n        if (this.fileLevelExports.has(internalName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n        } else {\r\n          this.fileLevelExports.set(internalName, global);\r\n        }\r\n        this.currentFilespace.members.set(simpleName, global);\r\n        if (declaration.range.source.isEntry) {\r\n          if (this.moduleLevelExports.has(simpleName)) {\r\n            let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n            this.error(\r\n              DiagnosticCode.Duplicate_identifier_0,\r\n              declaration.name.range, existingExport.element.internalName\r\n            );\r\n            continue;\r\n          }\r\n          global.set(CommonFlags.MODULE_EXPORT);\r\n          this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n            element: global,\r\n            identifier: declaration.name\r\n          });\r\n        }\r\n      }\r\n      this.checkGlobal(global, declaration);\r\n    }\r\n  }\r\n}\r\n\r\n/** Indicates the specific kind of an {@link Element}. */\r\nexport enum ElementKind {\r\n  /** A {@link Global}. */\r\n  GLOBAL,\r\n  /** A {@link Local}. */\r\n  LOCAL,\r\n  /** An {@link Enum}. */\r\n  ENUM,\r\n  /** An {@link EnumValue}. */\r\n  ENUMVALUE,\r\n  /** A {@link FunctionPrototype}. */\r\n  FUNCTION_PROTOTYPE,\r\n  /** A {@link Function}. */\r\n  FUNCTION,\r\n  /** A {@link FunctionTarget}. */\r\n  FUNCTION_TARGET,\r\n  /** A {@link ClassPrototype}. */\r\n  CLASS_PROTOTYPE,\r\n  /** A {@link Class}. */\r\n  CLASS,\r\n  /** An {@link InterfacePrototype}. */\r\n  INTERFACE_PROTOTYPE,\r\n  /** An {@link Interface}. */\r\n  INTERFACE,\r\n  /** A {@link FieldPrototype}. */\r\n  FIELD_PROTOTYPE,\r\n  /** A {@link Field}. */\r\n  FIELD,\r\n  /** A {@link Property}. */\r\n  PROPERTY,\r\n  /** A {@link Namespace}. */\r\n  NAMESPACE,\r\n  /** A {@link Filespace}. */\r\n  FILESPACE,\r\n}\r\n\r\nexport enum DecoratorFlags {\r\n  /** No flags set. */\r\n  NONE = 0,\r\n  /** Is a program global. */\r\n  GLOBAL = 1 << 0,\r\n  /** Is a binary operator overload. */\r\n  OPERATOR_BINARY = 1 << 1,\r\n  /** Is a unary prefix operator overload. */\r\n  OPERATOR_PREFIX = 1 << 2,\r\n  /** Is a unary postfix operator overload. */\r\n  OPERATOR_POSTFIX = 1 << 3,\r\n  /** Is an unmanaged class. */\r\n  UNMANAGED = 1 << 4,\r\n  /** Is a sealed class. */\r\n  SEALED = 1 << 5,\r\n  /** Is always inlined. */\r\n  INLINE = 1 << 6,\r\n  /** Is using a different external name. */\r\n  EXTERNAL = 1 << 7,\r\n  /** Is a builtin. */\r\n  BUILTIN = 1 << 8\r\n}\r\n\r\nexport function decoratorKindToFlag(kind: DecoratorKind): DecoratorFlags {\r\n  switch (kind) {\r\n    case DecoratorKind.GLOBAL: return DecoratorFlags.GLOBAL;\r\n    case DecoratorKind.OPERATOR:\r\n    case DecoratorKind.OPERATOR_BINARY: return DecoratorFlags.OPERATOR_BINARY;\r\n    case DecoratorKind.OPERATOR_PREFIX: return DecoratorFlags.OPERATOR_PREFIX;\r\n    case DecoratorKind.OPERATOR_POSTFIX: return DecoratorFlags.OPERATOR_POSTFIX;\r\n    case DecoratorKind.UNMANAGED: return DecoratorFlags.UNMANAGED;\r\n    case DecoratorKind.SEALED: return DecoratorFlags.SEALED;\r\n    case DecoratorKind.INLINE: return DecoratorFlags.INLINE;\r\n    case DecoratorKind.EXTERNAL: return DecoratorFlags.EXTERNAL;\r\n    case DecoratorKind.BUILTIN: return DecoratorFlags.BUILTIN;\r\n    default: return DecoratorFlags.NONE;\r\n  }\r\n}\r\n\r\n/** Base class of all program elements. */\r\nexport abstract class Element {\r\n\r\n  /** Specific element kind. */\r\n  kind: ElementKind;\r\n  /** Containing {@link Program}. */\r\n  program: Program;\r\n  /** Simple name. */\r\n  simpleName: string;\r\n  /** Internal name referring to this element. */\r\n  internalName: string;\r\n  /** Common flags indicating specific traits. */\r\n  flags: CommonFlags = CommonFlags.NONE;\r\n  /** Decorator flags indicating annotated traits. */\r\n  decoratorFlags: DecoratorFlags = DecoratorFlags.NONE;\r\n  /** Namespaced member elements. */\r\n  members: Map<string,Element> | null = null;\r\n  /** Parent element, if applicable. */\r\n  parent: Element | null = null;\r\n\r\n  /** Constructs a new element, linking it to its containing {@link Program}. */\r\n  protected constructor(program: Program, simpleName: string, internalName: string) {\r\n    this.program = program;\r\n    this.simpleName = simpleName;\r\n    this.internalName = internalName;\r\n  }\r\n\r\n  /** Tests if this element has a specific flag or flags. */\r\n  is(flag: CommonFlags): bool { return (this.flags & flag) == flag; }\r\n  /** Tests if this element has any of the specified flags. */\r\n  isAny(flags: CommonFlags): bool { return (this.flags & flags) != 0; }\r\n  /** Sets a specific flag or flags. */\r\n  set(flag: CommonFlags): void { this.flags |= flag; }\r\n  /** Tests if this element has a specific decorator flag or flags. */\r\n  hasDecorator(flag: DecoratorFlags): bool { return (this.decoratorFlags & flag) == flag; }\r\n}\r\n\r\n/** A filespace representing the implicit top-level namespace of a source. */\r\nexport class Filespace extends Element {\r\n\r\n  kind = ElementKind.FILESPACE;\r\n\r\n  /** File members (externally visible only). */\r\n  members: Map<string,Element>; // more specific\r\n\r\n  /** Constructs a new filespace. */\r\n  constructor(\r\n    program: Program,\r\n    source: Source\r\n  ) {\r\n    super(program, source.internalPath, FILESPACE_PREFIX + source.internalPath);\r\n    this.members = new Map();\r\n  }\r\n}\r\n\r\n/** A namespace that differs from a filespace in being user-declared with a name. */\r\nexport class Namespace extends Element {\r\n\r\n  // All elements have namespace semantics. This is an explicitly declared one.\r\n  kind = ElementKind.NAMESPACE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: NamespaceDeclaration; // more specific\r\n\r\n  /** Constructs a new namespace. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: NamespaceDeclaration\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n  }\r\n}\r\n\r\n/** An enum. */\r\nexport class Enum extends Element {\r\n\r\n  kind = ElementKind.ENUM;\r\n\r\n  /** Declaration reference. */\r\n  declaration: EnumDeclaration;\r\n\r\n  /** Constructs a new enum. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: EnumDeclaration\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n  }\r\n}\r\n\r\n/** An enum value. */\r\nexport class EnumValue extends Element {\r\n\r\n  kind = ElementKind.ENUMVALUE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: EnumValueDeclaration;\r\n  /** Constant value, if applicable. */\r\n  constantValue: i32 = 0;\r\n\r\n  constructor(\r\n    enm: Enum,\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: EnumValueDeclaration\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.parent = enm;\r\n    this.declaration = declaration;\r\n  }\r\n}\r\n\r\nexport const enum ConstantValueKind {\r\n  NONE,\r\n  INTEGER,\r\n  FLOAT\r\n}\r\n\r\nexport class VariableLikeElement extends Element {\r\n\r\n  // kind varies\r\n\r\n  /** Declaration reference. */\r\n  declaration: VariableLikeDeclarationStatement | null;\r\n  /** Variable type. Is {@link Type.void} for type-inferred {@link Global}s before compilation. */\r\n  type: Type;\r\n  /** Constant value kind. */\r\n  constantValueKind: ConstantValueKind = ConstantValueKind.NONE;\r\n  /** Constant integer value, if applicable. */\r\n  constantIntegerValue: I64;\r\n  /** Constant float value, if applicable. */\r\n  constantFloatValue: f64;\r\n\r\n  protected constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    type: Type,\r\n    declaration: VariableLikeDeclarationStatement | null\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.type = type;\r\n    this.declaration = declaration;\r\n  }\r\n\r\n  withConstantIntegerValue(value: I64): this {\r\n    this.constantValueKind = ConstantValueKind.INTEGER;\r\n    this.constantIntegerValue = value;\r\n    this.set(CommonFlags.CONST | CommonFlags.INLINED);\r\n    return this;\r\n  }\r\n\r\n  withConstantFloatValue(value: f64): this {\r\n    this.constantValueKind = ConstantValueKind.FLOAT;\r\n    this.constantFloatValue = value;\r\n    this.set(CommonFlags.CONST | CommonFlags.INLINED);\r\n    return this;\r\n  }\r\n}\r\n\r\n/** A global variable. */\r\nexport class Global extends VariableLikeElement {\r\n\r\n  kind = ElementKind.GLOBAL;\r\n\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    type: Type,\r\n    declaration: VariableLikeDeclarationStatement | null,\r\n    decoratorFlags: DecoratorFlags\r\n  ) {\r\n    super(program, simpleName, internalName, type, declaration);\r\n    this.flags = declaration ? declaration.flags : CommonFlags.NONE;\r\n    this.decoratorFlags = decoratorFlags;\r\n    this.type = type; // resolved later if `void`\r\n  }\r\n}\r\n\r\n/** A function parameter. */\r\nexport class Parameter {\r\n\r\n  // not an Element on its own\r\n\r\n  /** Parameter name. */\r\n  name: string;\r\n  /** Parameter type. */\r\n  type: Type;\r\n  /** Parameter initializer. */\r\n  initializer: Expression | null;\r\n\r\n  /** Constructs a new function parameter. */\r\n  constructor(name: string, type: Type, initializer: Expression | null = null) {\r\n    this.name = name;\r\n    this.type = type;\r\n    this.initializer = initializer;\r\n  }\r\n}\r\n\r\n/** A function local. */\r\nexport class Local extends VariableLikeElement {\r\n\r\n  kind = ElementKind.LOCAL;\r\n\r\n  /** Local index. */\r\n  index: i32;\r\n  /** Respective scoped global, if any. */\r\n  scopedGlobal: Global | null = null;\r\n\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    index: i32,\r\n    type: Type,\r\n    declaration: VariableLikeDeclarationStatement | null = null\r\n  ) {\r\n    super(program, simpleName, simpleName, type, declaration);\r\n    this.index = index;\r\n  }\r\n}\r\n\r\n/** A yet unresolved function prototype. */\r\nexport class FunctionPrototype extends Element {\r\n\r\n  kind = ElementKind.FUNCTION_PROTOTYPE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: FunctionDeclaration;\r\n  /** If an instance method, the class prototype reference. */\r\n  classPrototype: ClassPrototype | null;\r\n  /** Resolved instances. */\r\n  instances: Map<string,Function> = new Map();\r\n  /** Class type arguments, if a partially resolved method of a generic class. Not set otherwise. */\r\n  classTypeArguments: Type[] | null = null;\r\n  /** Operator kind, if an overload. */\r\n  operatorKind: OperatorKind = OperatorKind.INVALID;\r\n\r\n  /** Constructs a new function prototype. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: FunctionDeclaration,\r\n    classPrototype: ClassPrototype | null = null,\r\n    decoratorFlags: DecoratorFlags = DecoratorFlags.NONE\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n    this.classPrototype = classPrototype;\r\n    this.decoratorFlags = decoratorFlags;\r\n  }\r\n\r\n  toString(): string { return this.simpleName; }\r\n}\r\n\r\n/** A resolved function. */\r\nexport class Function extends Element {\r\n\r\n  kind = ElementKind.FUNCTION;\r\n\r\n  /** Prototype reference. */\r\n  prototype: FunctionPrototype;\r\n  /** Function signature. */\r\n  signature: Signature;\r\n  /** Map of locals by name. */\r\n  localsByName: Map<string,Local> = new Map();\r\n  /** Array of locals by index. */\r\n  localsByIndex: Local[] = [];\r\n  /** List of additional non-parameter locals. */\r\n  additionalLocals: Type[] = [];\r\n  /** Current break context label. */\r\n  breakContext: string | null = null;\r\n  /** Contextual type arguments. */\r\n  contextualTypeArguments: Map<string,Type> | null;\r\n  /** Current control flow. */\r\n  flow: Flow;\r\n  /** Remembered debug locations. */\r\n  debugLocations: Range[] = [];\r\n  /** Function reference, if compiled. */\r\n  ref: FunctionRef = 0;\r\n  /** Function table index, if any. */\r\n  functionTableIndex: i32 = -1;\r\n  /** Trampoline function for calling with omitted arguments. */\r\n  trampoline: Function | null = null;\r\n  /** The outer scope, if a function expression. */\r\n  outerScope: Flow | null = null;\r\n\r\n  private nextBreakId: i32 = 0;\r\n  private breakStack: i32[] | null = null;\r\n  nextInlineId: i32 = 0;\r\n\r\n  /** Constructs a new concrete function. */\r\n  constructor(\r\n    prototype: FunctionPrototype,\r\n    internalName: string,\r\n    signature: Signature,\r\n    parent: Element | null = null,\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ) {\r\n    super(prototype.program, prototype.simpleName, internalName);\r\n    this.prototype = prototype;\r\n    this.signature = signature;\r\n    this.parent = parent;\r\n    this.flags = prototype.flags;\r\n    this.decoratorFlags = prototype.decoratorFlags;\r\n    this.contextualTypeArguments = contextualTypeArguments;\r\n    if (!(prototype.is(CommonFlags.AMBIENT))) {\r\n      let localIndex = 0;\r\n      if (parent && parent.kind == ElementKind.CLASS) {\r\n        assert(this.is(CommonFlags.INSTANCE));\r\n        let local = new Local(\r\n          prototype.program,\r\n          \"this\",\r\n          localIndex++,\r\n          assert(signature.thisType)\r\n        );\r\n        this.localsByName.set(\"this\", local);\r\n        this.localsByIndex[local.index] = local;\r\n        let inheritedTypeArguments = (<Class>parent).contextualTypeArguments;\r\n        if (inheritedTypeArguments) {\r\n          if (!this.contextualTypeArguments) this.contextualTypeArguments = new Map();\r\n          for (let [inheritedName, inheritedType] of inheritedTypeArguments) {\r\n            if (!this.contextualTypeArguments.has(inheritedName)) {\r\n              this.contextualTypeArguments.set(inheritedName, inheritedType);\r\n            }\r\n          }\r\n        }\r\n      } else {\r\n        assert(!this.is(CommonFlags.INSTANCE)); // internal error\r\n      }\r\n      let parameterTypes = signature.parameterTypes;\r\n      for (let i = 0, k = parameterTypes.length; i < k; ++i) {\r\n        let parameterType = parameterTypes[i];\r\n        let parameterName = signature.getParameterName(i);\r\n        let local = new Local(\r\n          prototype.program,\r\n          parameterName,\r\n          localIndex++,\r\n          parameterType\r\n          // FIXME: declaration?\r\n        );\r\n        this.localsByName.set(parameterName, local);\r\n        this.localsByIndex[local.index] = local;\r\n      }\r\n    }\r\n    this.flow = Flow.create(this);\r\n  }\r\n\r\n  /** Adds a local of the specified type, with an optional name. */\r\n  addLocal(type: Type, name: string | null = null, declaration: VariableDeclaration | null = null): Local {\r\n    // if it has a name, check previously as this method will throw otherwise\r\n    var localIndex = this.signature.parameterTypes.length + this.additionalLocals.length;\r\n    if (this.is(CommonFlags.INSTANCE)) ++localIndex;\r\n    var local = new Local(\r\n      this.prototype.program,\r\n      name\r\n        ? name\r\n        : \"var$\" + localIndex.toString(10),\r\n      localIndex,\r\n      type,\r\n      declaration\r\n    );\r\n    if (name) {\r\n      if (this.localsByName.has(name)) throw new Error(\"duplicate local name\");\r\n      this.localsByName.set(name, local);\r\n    }\r\n    this.localsByIndex[local.index] = local;\r\n    this.additionalLocals.push(type);\r\n    return local;\r\n  }\r\n\r\n  private tempI32s: Local[] | null = null;\r\n  private tempI64s: Local[] | null = null;\r\n  private tempF32s: Local[] | null = null;\r\n  private tempF64s: Local[] | null = null;\r\n\r\n  /** Gets a free temporary local of the specified type. */\r\n  getTempLocal(type: Type, wrapped: bool = false): Local {\r\n    var temps: Local[] | null;\r\n    switch (type.toNativeType()) {\r\n      case NativeType.I32: {\r\n        temps = this.tempI32s;\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        temps = this.tempI64s;\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        temps = this.tempF32s;\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        temps = this.tempF64s;\r\n        break;\r\n      }\r\n      default: throw new Error(\"concrete type expected\");\r\n    }\r\n    var local: Local;\r\n    if (temps && temps.length) {\r\n      local = temps.pop();\r\n      local.type = type;\r\n      local.flags = CommonFlags.NONE;\r\n    } else {\r\n      local = this.addLocal(type);\r\n    }\r\n    if (type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n      this.flow.setLocalWrapped(local.index, wrapped);\r\n    }\r\n    return local;\r\n  }\r\n\r\n  /** Frees the temporary local for reuse. */\r\n  freeTempLocal(local: Local): void {\r\n    if (local.is(CommonFlags.INLINED)) return;\r\n    assert(local.index >= 0);\r\n    var temps: Local[];\r\n    assert(local.type != null); // internal error\r\n    switch ((<Type>local.type).toNativeType()) {\r\n      case NativeType.I32: {\r\n        temps = this.tempI32s || (this.tempI32s = []);\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        temps = this.tempI64s || (this.tempI64s = []);\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        temps = this.tempF32s || (this.tempF32s = []);\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        temps = this.tempF64s || (this.tempF64s = []);\r\n        break;\r\n      }\r\n      default: throw new Error(\"concrete type expected\");\r\n    }\r\n    assert(local.index >= 0);\r\n    temps.push(local);\r\n  }\r\n\r\n  /** Gets and immediately frees a temporary local of the specified type. */\r\n  getAndFreeTempLocal(type: Type, wrapped: bool): Local {\r\n    var temps: Local[];\r\n    switch (type.toNativeType()) {\r\n      case NativeType.I32: {\r\n        temps = this.tempI32s || (this.tempI32s = []);\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        temps = this.tempI64s || (this.tempI64s = []);\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        temps = this.tempF32s || (this.tempF32s = []);\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        temps = this.tempF64s || (this.tempF64s = []);\r\n        break;\r\n      }\r\n      default: throw new Error(\"concrete type expected\");\r\n    }\r\n    var local: Local;\r\n    if (temps.length) {\r\n      local = temps[temps.length - 1];\r\n      local.type = type;\r\n    } else {\r\n      local = this.addLocal(type);\r\n      temps.push(local);\r\n    }\r\n    if (type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n      this.flow.setLocalWrapped(local.index, wrapped);\r\n    }\r\n    return local;\r\n  }\r\n\r\n  /** Enters a(nother) break context. */\r\n  enterBreakContext(): string {\r\n    var id = this.nextBreakId++;\r\n    if (!this.breakStack) this.breakStack = [ id ];\r\n    else this.breakStack.push(id);\r\n    return this.breakContext = id.toString(10);\r\n  }\r\n\r\n  /** Leaves the current break context. */\r\n  leaveBreakContext(): void {\r\n    assert(this.breakStack != null);\r\n    var length = (<i32[]>this.breakStack).length;\r\n    assert(length > 0);\r\n    (<i32[]>this.breakStack).pop();\r\n    if (length > 1) {\r\n      this.breakContext = (<i32[]>this.breakStack)[length - 2].toString(10);\r\n    } else {\r\n      this.breakContext = null;\r\n      this.breakStack = null;\r\n    }\r\n  }\r\n\r\n  /** Finalizes the function once compiled, releasing no longer needed resources. */\r\n  finalize(module: Module, ref: FunctionRef): void {\r\n    this.ref = ref;\r\n    assert(!this.breakStack || !this.breakStack.length); // internal error\r\n    this.breakStack = null;\r\n    this.breakContext = null;\r\n    this.tempI32s = this.tempI64s = this.tempF32s = this.tempF64s = null;\r\n    if (this.program.options.sourceMap) {\r\n      let debugLocations = this.debugLocations;\r\n      for (let i = 0, k = debugLocations.length; i < k; ++i) {\r\n        let debugLocation = debugLocations[i];\r\n        module.setDebugLocation(\r\n          ref,\r\n          debugLocation.debugInfoRef,\r\n          debugLocation.source.debugInfoIndex,\r\n          debugLocation.line,\r\n          debugLocation.column\r\n        );\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Returns the TypeScript representation of this function. */\r\n  toString(): string { return this.prototype.simpleName; }\r\n}\r\n\r\n/** A resolved function target, that is a function called indirectly by an index and signature. */\r\nexport class FunctionTarget extends Element {\r\n\r\n  kind = ElementKind.FUNCTION_TARGET;\r\n\r\n  /** Underlying signature. */\r\n  signature: Signature;\r\n  /** Function type. */\r\n  type: Type;\r\n\r\n  /** Constructs a new function target. */\r\n  constructor(program: Program, signature: Signature) {\r\n    super(program, \"\", \"\");\r\n    var simpleName = signature.toSignatureString();\r\n    this.simpleName = simpleName;\r\n    this.internalName = simpleName;\r\n    this.signature = signature;\r\n    this.type = Type.u32.asFunction(signature);\r\n  }\r\n}\r\n\r\n/** A yet unresolved instance field prototype. */\r\nexport class FieldPrototype extends Element {\r\n\r\n  kind = ElementKind.FIELD_PROTOTYPE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: FieldDeclaration;\r\n  /** Parent class prototype. */\r\n  classPrototype: ClassPrototype;\r\n\r\n  /** Constructs a new field prototype. */\r\n  constructor(\r\n    classPrototype: ClassPrototype,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: FieldDeclaration\r\n  ) {\r\n    super(classPrototype.program, simpleName, internalName);\r\n    this.classPrototype = classPrototype;\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n  }\r\n}\r\n\r\n/** A resolved instance field. */\r\nexport class Field extends VariableLikeElement {\r\n\r\n  kind = ElementKind.FIELD;\r\n\r\n  /** Field prototype reference. */\r\n  prototype: FieldPrototype;\r\n  /** Field memory offset, if an instance field. */\r\n  memoryOffset: i32 = -1;\r\n\r\n  /** Constructs a new field. */\r\n  constructor(\r\n    prototype: FieldPrototype,\r\n    internalName: string,\r\n    type: Type,\r\n    declaration: FieldDeclaration,\r\n    parent: Class\r\n  ) {\r\n    super(prototype.program, prototype.simpleName, internalName, type, declaration);\r\n    this.prototype = prototype;\r\n    this.flags = prototype.flags;\r\n    this.type = type;\r\n    this.parent = parent;\r\n  }\r\n}\r\n\r\n/** A property comprised of a getter and a setter function. */\r\nexport class Property extends Element {\r\n\r\n  kind = ElementKind.PROPERTY;\r\n\r\n  /** Parent class prototype. */\r\n  parent: ClassPrototype;\r\n  /** Getter prototype. */\r\n  getterPrototype: FunctionPrototype | null = null;\r\n  /** Setter prototype. */\r\n  setterPrototype: FunctionPrototype | null = null;\r\n\r\n  /** Constructs a new property prototype. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    parent: ClassPrototype\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.parent = parent;\r\n  }\r\n}\r\n\r\n/** A yet unresolved class prototype. */\r\nexport class ClassPrototype extends Element {\r\n\r\n  kind = ElementKind.CLASS_PROTOTYPE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: ClassDeclaration;\r\n  /** Resolved instances. */\r\n  instances: Map<string,Class> = new Map();\r\n  /** Instance member prototypes. */\r\n  instanceMembers: Map<string,Element> | null = null;\r\n  /** Base class prototype, if applicable. */\r\n  basePrototype: ClassPrototype | null = null; // set in Program#initialize\r\n  /** Constructor prototype. */\r\n  constructorPrototype: FunctionPrototype | null = null;\r\n  /** Operator overload prototypes. */\r\n  overloadPrototypes: Map<OperatorKind, FunctionPrototype> = new Map();\r\n\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: ClassDeclaration,\r\n    decoratorFlags: DecoratorFlags\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n    this.decoratorFlags = decoratorFlags;\r\n  }\r\n\r\n  toString(): string {\r\n    return this.simpleName;\r\n  }\r\n}\r\n\r\n/** A resolved class. */\r\nexport class Class extends Element {\r\n\r\n  kind = ElementKind.CLASS;\r\n\r\n  /** Prototype reference. */\r\n  prototype: ClassPrototype;\r\n  /** Resolved type arguments. */\r\n  typeArguments: Type[] | null;\r\n  /** Resolved class type. */\r\n  type: Type;\r\n  /** Base class, if applicable. */\r\n  base: Class | null;\r\n  /** Contextual type arguments for fields and methods. */\r\n  contextualTypeArguments: Map<string,Type> | null = null;\r\n  /** Current member memory offset. */\r\n  currentMemoryOffset: u32 = 0;\r\n  /** Constructor instance. */\r\n  constructorInstance: Function | null = null;\r\n  /** Operator overloads. */\r\n  overloads: Map<OperatorKind,Function> | null = null;\r\n  /** Function index of the GC hook. */\r\n  gcHookIndex: u32 = <u32>-1;\r\n\r\n  /** Constructs a new class. */\r\n  constructor(\r\n    prototype: ClassPrototype,\r\n    simpleName: string,\r\n    internalName: string,\r\n    typeArguments: Type[] | null = null,\r\n    base: Class | null = null\r\n  ) {\r\n    super(prototype.program, simpleName, internalName);\r\n    this.prototype = prototype;\r\n    this.flags = prototype.flags;\r\n    this.decoratorFlags = prototype.decoratorFlags;\r\n    this.typeArguments = typeArguments;\r\n    this.type = prototype.program.options.usizeType.asClass(this);\r\n    this.base = base;\r\n\r\n    // inherit static members and contextual type arguments from base class\r\n    if (base) {\r\n      let inheritedTypeArguments = base.contextualTypeArguments;\r\n      if (inheritedTypeArguments) {\r\n        if (!this.contextualTypeArguments) this.contextualTypeArguments = new Map();\r\n        for (let [baseName, baseType] of inheritedTypeArguments) {\r\n          this.contextualTypeArguments.set(baseName, baseType);\r\n        }\r\n      }\r\n    }\r\n\r\n    // apply instance-specific contextual type arguments\r\n    var declaration = this.prototype.declaration;\r\n    var i: i32, k: i32;\r\n    if (declaration) { // irrelevant for built-ins\r\n      let typeParameters = declaration.typeParameters;\r\n      if (typeArguments) {\r\n        if ((k = typeArguments.length) != typeParameters.length) {\r\n          throw new Error(\"type argument count mismatch\");\r\n        }\r\n        if (k) {\r\n          if (!this.contextualTypeArguments) this.contextualTypeArguments = new Map();\r\n          for (i = 0; i < k; ++i) {\r\n            this.contextualTypeArguments.set(typeParameters[i].name.text, typeArguments[i]);\r\n          }\r\n        }\r\n      } else if (typeParameters.length) {\r\n        throw new Error(\"type argument count mismatch\");\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Tests if a value of this class type is assignable to a target of the specified class type. */\r\n  isAssignableTo(target: Class): bool {\r\n    var current: Class | null = this;\r\n    do if (current == target) return true;\r\n    while (current = current.base);\r\n    return false;\r\n  }\r\n\r\n  /** Looks up the operator overload of the specified kind. */\r\n  lookupOverload(kind: OperatorKind, unchecked: bool = false): Function | null {\r\n    if (unchecked) {\r\n      switch (kind) {\r\n        case OperatorKind.INDEXED_GET: {\r\n          let uncheckedOverload = this.lookupOverload(OperatorKind.UNCHECKED_INDEXED_GET);\r\n          if (uncheckedOverload) return uncheckedOverload;\r\n          break;\r\n        }\r\n        case OperatorKind.INDEXED_SET: {\r\n          let uncheckedOverload = this.lookupOverload(OperatorKind.UNCHECKED_INDEXED_SET);\r\n          if (uncheckedOverload) return uncheckedOverload;\r\n          break;\r\n        }\r\n        default: assert(false);\r\n      }\r\n    }\r\n    var instance: Class | null = this;\r\n    do {\r\n      let overloads = instance.overloads;\r\n      if (overloads) {\r\n        let overload = overloads.get(kind);\r\n        if (overload) return overload;\r\n      }\r\n    } while (instance = instance.base);\r\n    return null;\r\n  }\r\n\r\n  offsetof(fieldName: string): u32 {\r\n    var members = assert(this.members);\r\n    assert(members.has(fieldName));\r\n    var field = <Element>members.get(fieldName);\r\n    assert(field.kind == ElementKind.FIELD);\r\n    return (<Field>field).memoryOffset;\r\n  }\r\n\r\n  toString(): string {\r\n    return this.simpleName;\r\n  }\r\n}\r\n\r\n/** A yet unresolved interface. */\r\nexport class InterfacePrototype extends ClassPrototype {\r\n\r\n  kind = ElementKind.INTERFACE_PROTOTYPE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: InterfaceDeclaration; // more specific\r\n\r\n  /** Constructs a new interface prototype. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: InterfaceDeclaration,\r\n    decoratorFlags: DecoratorFlags\r\n  ) {\r\n    super(program, simpleName, internalName, declaration, decoratorFlags);\r\n  }\r\n}\r\n\r\n/** A resolved interface. */\r\nexport class Interface extends Class {\r\n\r\n  kind = ElementKind.INTERFACE;\r\n\r\n  /** Prototype reference. */\r\n  prototype: InterfacePrototype; // more specific\r\n  /** Base interface, if applcable. */\r\n  base: Interface | null; // more specific\r\n\r\n  /** Constructs a new interface. */\r\n  constructor(\r\n    prototype: InterfacePrototype,\r\n    simpleName: string,\r\n    internalName: string,\r\n    typeArguments: Type[] = [],\r\n    base: Interface | null = null\r\n  ) {\r\n    super(prototype, simpleName, internalName, typeArguments, base);\r\n  }\r\n}\r\n\r\n/** Control flow flags indicating specific conditions. */\r\nexport const enum FlowFlags {\r\n  /** No specific conditions. */\r\n  NONE = 0,\r\n\r\n  // categorical\r\n\r\n  /** This branch always returns. */\r\n  RETURNS = 1 << 0,\r\n  /** This branch always returns a wrapped value. */\r\n  RETURNS_WRAPPED = 1 << 1,\r\n  /** This branch always throws. */\r\n  THROWS = 1 << 2,\r\n  /** This branch always breaks. */\r\n  BREAKS = 1 << 3,\r\n  /** This branch always continues. */\r\n  CONTINUES = 1 << 4,\r\n  /** This branch always allocates. Constructors only. */\r\n  ALLOCATES = 1 << 5,\r\n\r\n  // conditional\r\n\r\n  /** This branch conditionally returns in a child branch. */\r\n  CONDITIONALLY_RETURNS = 1 << 6,\r\n  /** This branch conditionally throws in a child branch. */\r\n  CONDITIONALLY_THROWS = 1 << 7,\r\n  /** This branch conditionally breaks in a child branch. */\r\n  CONDITIONALLY_BREAKS = 1 << 8,\r\n  /** This branch conditionally continues in a child branch. */\r\n  CONDITIONALLY_CONTINUES = 1 << 9,\r\n  /** This branch conditionally allocates in a child branch. Constructors only. */\r\n  CONDITIONALLY_ALLOCATES = 1 << 10,\r\n\r\n  // special\r\n\r\n  /** This branch is part of inlining a function. */\r\n  INLINE_CONTEXT = 1 << 11,\r\n  /** This branch explicitly requests no bounds checking. */\r\n  UNCHECKED_CONTEXT = 1 << 12,\r\n\r\n  // masks\r\n\r\n  /** Any terminating flag. */\r\n  ANY_TERMINATING = FlowFlags.RETURNS\r\n                  | FlowFlags.THROWS\r\n                  | FlowFlags.BREAKS\r\n                  | FlowFlags.CONTINUES,\r\n\r\n  /** Any categorical flag. */\r\n  ANY_CATEGORICAL = FlowFlags.RETURNS\r\n                  | FlowFlags.RETURNS_WRAPPED\r\n                  | FlowFlags.THROWS\r\n                  | FlowFlags.BREAKS\r\n                  | FlowFlags.CONTINUES\r\n                  | FlowFlags.ALLOCATES,\r\n\r\n  /** Any conditional flag. */\r\n  ANY_CONDITIONAL = FlowFlags.CONDITIONALLY_RETURNS\r\n                  | FlowFlags.CONDITIONALLY_THROWS\r\n                  | FlowFlags.CONDITIONALLY_BREAKS\r\n                  | FlowFlags.CONDITIONALLY_CONTINUES\r\n                  | FlowFlags.CONDITIONALLY_ALLOCATES\r\n}\r\n\r\n/** A control flow evaluator. */\r\nexport class Flow {\r\n\r\n  /** Parent flow. */\r\n  parent: Flow | null;\r\n  /** Flow flags indicating specific conditions. */\r\n  flags: FlowFlags;\r\n  /** Function this flow belongs to. */\r\n  currentFunction: Function;\r\n  /** The label we break to when encountering a continue statement. */\r\n  continueLabel: string | null;\r\n  /** The label we break to when encountering a break statement. */\r\n  breakLabel: string | null;\r\n  /** The label we break to when encountering a return statement, when inlining. */\r\n  returnLabel: string | null;\r\n  /** The current return type. */\r\n  returnType: Type;\r\n  /** The current contextual type arguments. */\r\n  contextualTypeArguments: Map<string,Type> | null;\r\n  /** Scoped local variables. */\r\n  scopedLocals: Map<string,Local> | null = null;\r\n  /** Local variable wrap states for the first 64 locals. */\r\n  wrappedLocals: I64;\r\n  /** Local variable wrap states for locals with index >= 64. */\r\n  wrappedLocalsExt: I64[] | null;\r\n\r\n  /** Creates the parent flow of the specified function. */\r\n  static create(currentFunction: Function): Flow {\r\n    var parentFlow = new Flow();\r\n    parentFlow.parent = null;\r\n    parentFlow.flags = FlowFlags.NONE;\r\n    parentFlow.currentFunction = currentFunction;\r\n    parentFlow.continueLabel = null;\r\n    parentFlow.breakLabel = null;\r\n    parentFlow.returnLabel = null;\r\n    parentFlow.returnType = currentFunction.signature.returnType;\r\n    parentFlow.contextualTypeArguments = currentFunction.contextualTypeArguments;\r\n    parentFlow.wrappedLocals = i64_new(0);\r\n    parentFlow.wrappedLocalsExt = null;\r\n    return parentFlow;\r\n  }\r\n\r\n  private constructor() { }\r\n\r\n  /** Tests if this flow has the specified flag or flags. */\r\n  is(flag: FlowFlags): bool { return (this.flags & flag) == flag; }\r\n  /** Tests if this flow has one of the specified flags. */\r\n  isAny(flag: FlowFlags): bool { return (this.flags & flag) != 0; }\r\n  /** Sets the specified flag or flags. */\r\n  set(flag: FlowFlags): void { this.flags |= flag; }\r\n  /** Unsets the specified flag or flags. */\r\n  unset(flag: FlowFlags): void { this.flags &= ~flag; }\r\n\r\n  /** Forks this flow to a child flow. */\r\n  fork(): Flow {\r\n    var branch = new Flow();\r\n    branch.parent = this;\r\n    branch.flags = this.flags;\r\n    branch.currentFunction = this.currentFunction;\r\n    branch.continueLabel = this.continueLabel;\r\n    branch.breakLabel = this.breakLabel;\r\n    branch.returnLabel = this.returnLabel;\r\n    branch.returnType = this.returnType;\r\n    branch.contextualTypeArguments = this.contextualTypeArguments;\r\n    branch.wrappedLocals = this.wrappedLocals;\r\n    branch.wrappedLocalsExt = this.wrappedLocalsExt ? this.wrappedLocalsExt.slice() : null;\r\n    return branch;\r\n  }\r\n\r\n  /** Frees this flow's scoped variables. */\r\n  free(): Flow {\r\n    var parent = assert(this.parent);\r\n    if (this.scopedLocals) { // free block-scoped locals\r\n      for (let scopedLocal of this.scopedLocals.values()) {\r\n        if (scopedLocal.is(CommonFlags.SCOPED)) { // otherwise an alias\r\n          this.currentFunction.freeTempLocal(scopedLocal);\r\n        }\r\n      }\r\n      this.scopedLocals = null;\r\n    }\r\n    return parent;\r\n  }\r\n\r\n  /** Adds a new scoped local of the specified name. */\r\n  addScopedLocal(type: Type, name: string, wrapped: bool, declaration?: VariableDeclaration): Local {\r\n    var scopedLocal = this.currentFunction.getTempLocal(type, false);\r\n    if (!this.scopedLocals) this.scopedLocals = new Map();\r\n    else {\r\n      let existingLocal = this.scopedLocals.get(name);\r\n      if (existingLocal) {\r\n        if (declaration) {\r\n          this.currentFunction.program.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range\r\n          );\r\n        } else assert(false);\r\n        return existingLocal;\r\n      }\r\n    }\r\n    scopedLocal.set(CommonFlags.SCOPED);\r\n    this.scopedLocals.set(name, scopedLocal);\r\n    if (type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n      this.setLocalWrapped(scopedLocal.index, wrapped);\r\n    }\r\n    return scopedLocal;\r\n  }\r\n\r\n  /** Adds a new scoped alias for the specified local. */\r\n  addScopedLocalAlias(index: i32, type: Type, name: string): Local {\r\n    if (!this.scopedLocals) this.scopedLocals = new Map();\r\n    else {\r\n      let existingLocal = this.scopedLocals.get(name);\r\n      if (existingLocal) {\r\n        let declaration = existingLocal.declaration;\r\n        if (declaration) {\r\n          this.currentFunction.program.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range\r\n          );\r\n        } else assert(false);\r\n        return existingLocal;\r\n      }\r\n    }\r\n    assert(index < this.currentFunction.localsByIndex.length);\r\n    var scopedAlias = new Local( // not SCOPED as an indicator that it isn't automatically free'd\r\n      this.currentFunction.program,\r\n      name,\r\n      index,\r\n      type,\r\n      null\r\n    );\r\n    this.scopedLocals.set(name, scopedAlias);\r\n    return scopedAlias;\r\n  }\r\n\r\n  /** Gets the local of the specified name in the current scope. */\r\n  getScopedLocal(name: string): Local | null {\r\n    var local: Local | null;\r\n    var current: Flow | null = this;\r\n    do {\r\n      if (current.scopedLocals && (local = current.scopedLocals.get(name))) {\r\n        return local;\r\n      }\r\n    } while (current = current.parent);\r\n    return this.currentFunction.localsByName.get(name);\r\n  }\r\n\r\n  /** Tests if the local with the specified index is considered wrapped. */\r\n  isLocalWrapped(index: i32): bool {\r\n    var map: I64;\r\n    var ext: I64[] | null;\r\n    if (index < 64) {\r\n      if (index < 0) return true; // inlined constant\r\n      map = this.wrappedLocals;\r\n    } else if (ext = this.wrappedLocalsExt) {\r\n      let i = ((index - 64) / 64) | 0;\r\n      if (i >= ext.length) return false;\r\n      map = ext[i];\r\n      index -= (i + 1) * 64;\r\n    } else {\r\n      return false;\r\n    }\r\n    return i64_ne(\r\n      i64_and(\r\n        map,\r\n        i64_shl(\r\n          i64_one,\r\n          i64_new(index)\r\n        )\r\n      ),\r\n      i64_zero\r\n    );\r\n  }\r\n\r\n  /** Sets if the local with the specified index is considered wrapped. */\r\n  setLocalWrapped(index: i32, wrapped: bool): void {\r\n    var map: I64;\r\n    var off: i32 = -1;\r\n    if (index < 64) {\r\n      if (index < 0) return; // inlined constant\r\n      map = this.wrappedLocals;\r\n    } else {\r\n      let ext = this.wrappedLocalsExt;\r\n      off = ((index - 64) / 64) | 0;\r\n      if (!ext) {\r\n        this.wrappedLocalsExt = ext = new Array(off + 1);\r\n        ext.length = 0;\r\n      }\r\n      while (ext.length <= off) ext.push(i64_new(0));\r\n      map = ext[off];\r\n      index -= (off + 1) * 64;\r\n    }\r\n    map = wrapped\r\n      ? i64_or(\r\n          map,\r\n          i64_shl(\r\n            i64_one,\r\n            i64_new(index)\r\n          )\r\n        )\r\n      : i64_and(\r\n          map,\r\n          i64_not(\r\n            i64_shl(\r\n              i64_one,\r\n              i64_new(index)\r\n            )\r\n          )\r\n        );\r\n    if (off >= 0) (<I64[]>this.wrappedLocalsExt)[off] = map;\r\n    else this.wrappedLocals = map;\r\n  }\r\n\r\n  /** Inherits flags and local wrap states from the specified flow (e.g. blocks). */\r\n  inherit(other: Flow): void {\r\n    this.flags |= other.flags & (FlowFlags.ANY_CATEGORICAL | FlowFlags.ANY_CONDITIONAL);\r\n    this.wrappedLocals = other.wrappedLocals;\r\n    this.wrappedLocalsExt = other.wrappedLocalsExt; // no need to slice because other flow is finished\r\n  }\r\n\r\n  /** Inherits categorical flags as conditional flags from the specified flow (e.g. then without else). */\r\n  inheritConditional(other: Flow): void {\r\n    if (other.is(FlowFlags.RETURNS)) {\r\n      this.set(FlowFlags.CONDITIONALLY_RETURNS);\r\n    }\r\n    if (other.is(FlowFlags.THROWS)) {\r\n      this.set(FlowFlags.CONDITIONALLY_THROWS);\r\n    }\r\n    if (other.is(FlowFlags.BREAKS) && other.breakLabel == this.breakLabel) {\r\n      this.set(FlowFlags.CONDITIONALLY_BREAKS);\r\n    }\r\n    if (other.is(FlowFlags.CONTINUES) && other.continueLabel == this.continueLabel) {\r\n      this.set(FlowFlags.CONDITIONALLY_CONTINUES);\r\n    }\r\n    if (other.is(FlowFlags.ALLOCATES)) {\r\n      this.set(FlowFlags.CONDITIONALLY_ALLOCATES);\r\n    }\r\n  }\r\n\r\n  /** Inherits mutual flags and local wrap states from the specified flows (e.g. then with else). */\r\n  inheritMutual(left: Flow, right: Flow): void {\r\n    // categorical flags set in both arms\r\n    this.flags |= left.flags & right.flags & FlowFlags.ANY_CATEGORICAL;\r\n\r\n    // conditional flags set in at least one arm\r\n    this.flags |= left.flags & FlowFlags.ANY_CONDITIONAL;\r\n    this.flags |= right.flags & FlowFlags.ANY_CONDITIONAL;\r\n\r\n    // locals wrapped in both arms\r\n    this.wrappedLocals = i64_and(left.wrappedLocals, right.wrappedLocals);\r\n    var leftExt = left.wrappedLocalsExt;\r\n    var rightExt = right.wrappedLocalsExt;\r\n    if (leftExt != null && rightExt != null) {\r\n      let thisExt = this.wrappedLocalsExt;\r\n      let minLength = min(leftExt.length, rightExt.length);\r\n      if (minLength) {\r\n        if (!thisExt) thisExt = new Array(minLength);\r\n        else while (thisExt.length < minLength) thisExt.push(i64_new(0));\r\n        for (let i = 0; i < minLength; ++i) {\r\n          thisExt[i] = i64_and(\r\n            leftExt[i],\r\n            rightExt[i]\r\n          );\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  /**\r\n   * Tests if an expression can possibly overflow in the context of this flow. Assumes that the\r\n   * expression might already have overflown and returns `false` only if the operation neglects\r\n   * any possibly combination of garbage bits being present.\r\n   */\r\n  canOverflow(expr: ExpressionRef, type: Type): bool {\r\n    // TODO: the following catches most common and a few uncommon cases, but there are additional\r\n    // opportunities here, obviously.\r\n    assert(type != Type.void);\r\n\r\n    // types other than i8, u8, i16, u16 and bool do not overflow\r\n    if (!type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) return false;\r\n\r\n    var operand: ExpressionRef;\r\n    switch (getExpressionId(expr)) {\r\n\r\n      // overflows if the local isn't wrapped or the conversion does\r\n      case ExpressionId.GetLocal: {\r\n        let currentFunction = this.currentFunction;\r\n        let local = currentFunction.localsByIndex[getGetLocalIndex(expr)];\r\n        return !currentFunction.flow.isLocalWrapped(local.index)\r\n            || canConversionOverflow(local.type, type);\r\n      }\r\n\r\n      // overflows if the value does\r\n      case ExpressionId.SetLocal: {\r\n        assert(isTeeLocal(expr));\r\n        return this.canOverflow(getSetLocalValue(expr), type);\r\n      }\r\n\r\n      // never overflows because globals are wrapped on set\r\n      case ExpressionId.GetGlobal: return false;\r\n\r\n      case ExpressionId.Binary: {\r\n        switch (getBinaryOp(expr)) {\r\n\r\n          // comparisons do not overflow (result is 0 or 1)\r\n          case BinaryOp.EqI32:\r\n          case BinaryOp.EqI64:\r\n          case BinaryOp.EqF32:\r\n          case BinaryOp.EqF64:\r\n          case BinaryOp.NeI32:\r\n          case BinaryOp.NeI64:\r\n          case BinaryOp.NeF32:\r\n          case BinaryOp.NeF64:\r\n          case BinaryOp.LtI32:\r\n          case BinaryOp.LtU32:\r\n          case BinaryOp.LtI64:\r\n          case BinaryOp.LtU64:\r\n          case BinaryOp.LtF32:\r\n          case BinaryOp.LtF64:\r\n          case BinaryOp.LeI32:\r\n          case BinaryOp.LeU32:\r\n          case BinaryOp.LeI64:\r\n          case BinaryOp.LeU64:\r\n          case BinaryOp.LeF32:\r\n          case BinaryOp.LeF64:\r\n          case BinaryOp.GtI32:\r\n          case BinaryOp.GtU32:\r\n          case BinaryOp.GtI64:\r\n          case BinaryOp.GtU64:\r\n          case BinaryOp.GtF32:\r\n          case BinaryOp.GtF64:\r\n          case BinaryOp.GeI32:\r\n          case BinaryOp.GeU32:\r\n          case BinaryOp.GeI64:\r\n          case BinaryOp.GeU64:\r\n          case BinaryOp.GeF32:\r\n          case BinaryOp.GeF64: return false;\r\n\r\n          // result won't overflow if one side is 0 or if one side is 1 and the other wrapped\r\n          case BinaryOp.MulI32: {\r\n            return !(\r\n              (\r\n                getExpressionId(operand = getBinaryLeft(expr)) == ExpressionId.Const &&\r\n                (\r\n                  getConstValueI32(operand) == 0 ||\r\n                  (\r\n                    getConstValueI32(operand) == 1 &&\r\n                    !this.canOverflow(getBinaryRight(expr), type)\r\n                  )\r\n                )\r\n              ) || (\r\n                getExpressionId(operand = getBinaryRight(expr)) == ExpressionId.Const &&\r\n                (\r\n                  getConstValueI32(operand) == 0 ||\r\n                  (\r\n                    getConstValueI32(operand) == 1 &&\r\n                    !this.canOverflow(getBinaryLeft(expr), type)\r\n                  )\r\n                )\r\n              )\r\n            );\r\n          }\r\n\r\n          // result won't overflow if one side is a constant less than this type's mask or one side\r\n          // is wrapped\r\n          case BinaryOp.AndI32: {\r\n            // note that computeSmallIntegerMask returns the mask minus the MSB for signed types\r\n            // because signed value garbage bits must be guaranteed to be equal to the MSB.\r\n            return !(\r\n              (\r\n                (\r\n                  getExpressionId(operand = getBinaryLeft(expr)) == ExpressionId.Const &&\r\n                  getConstValueI32(operand) <= type.computeSmallIntegerMask(Type.i32)\r\n                ) || !this.canOverflow(operand, type)\r\n              ) || (\r\n                (\r\n                  getExpressionId(operand = getBinaryRight(expr)) == ExpressionId.Const &&\r\n                  getConstValueI32(operand) <= type.computeSmallIntegerMask(Type.i32)\r\n                ) || !this.canOverflow(operand, type)\r\n              )\r\n            );\r\n          }\r\n\r\n          // overflows if the shift doesn't clear potential garbage bits\r\n          case BinaryOp.ShlI32: {\r\n            let shift = 32 - type.size;\r\n            return getExpressionId(operand = getBinaryRight(expr)) != ExpressionId.Const\r\n                || getConstValueI32(operand) < shift;\r\n          }\r\n\r\n          // overflows if the value does and the shift doesn't clear potential garbage bits\r\n          case BinaryOp.ShrI32: {\r\n            let shift = 32 - type.size;\r\n            return this.canOverflow(getBinaryLeft(expr), type) && (\r\n              getExpressionId(operand = getBinaryRight(expr)) != ExpressionId.Const ||\r\n              getConstValueI32(operand) < shift\r\n            );\r\n          }\r\n\r\n          // overflows if the shift does not clear potential garbage bits. if an unsigned value is\r\n          // wrapped, it can't overflow.\r\n          case BinaryOp.ShrU32: {\r\n            let shift = 32 - type.size;\r\n            return type.is(TypeFlags.SIGNED)\r\n              ? !(\r\n                  getExpressionId(operand = getBinaryRight(expr)) == ExpressionId.Const &&\r\n                  getConstValueI32(operand) > shift // must clear MSB\r\n                )\r\n              : this.canOverflow(getBinaryLeft(expr), type) && !(\r\n                  getExpressionId(operand = getBinaryRight(expr)) == ExpressionId.Const &&\r\n                  getConstValueI32(operand) >= shift // can leave MSB\r\n                );\r\n          }\r\n\r\n          // overflows if any side does\r\n          case BinaryOp.DivU32:\r\n          case BinaryOp.RemI32:\r\n          case BinaryOp.RemU32: {\r\n            return this.canOverflow(getBinaryLeft(expr), type)\r\n                || this.canOverflow(getBinaryRight(expr), type);\r\n          }\r\n        }\r\n        break;\r\n      }\r\n\r\n      case ExpressionId.Unary: {\r\n        switch (getUnaryOp(expr)) {\r\n\r\n          // comparisons do not overflow (result is 0 or 1)\r\n          case UnaryOp.EqzI32:\r\n          case UnaryOp.EqzI64: return false;\r\n\r\n          // overflow if the maximum result (32) cannot be represented in the target type\r\n          case UnaryOp.ClzI32:\r\n          case UnaryOp.CtzI32:\r\n          case UnaryOp.PopcntI32: return type.size < 7;\r\n        }\r\n        break;\r\n      }\r\n\r\n      // overflows if the value cannot be represented in the target type\r\n      case ExpressionId.Const: {\r\n        let value: i32 = 0;\r\n        switch (getExpressionType(expr)) {\r\n          case NativeType.I32: { value = getConstValueI32(expr); break; }\r\n          case NativeType.I64: { value = getConstValueI64Low(expr); break; } // discards upper bits\r\n          case NativeType.F32: { value = i32(getConstValueF32(expr)); break; }\r\n          case NativeType.F64: { value = i32(getConstValueF64(expr)); break; }\r\n          default: assert(false);\r\n        }\r\n        switch (type.kind) {\r\n          case TypeKind.I8: return value < i8.MIN_VALUE || value > i8.MAX_VALUE;\r\n          case TypeKind.I16: return value < i16.MIN_VALUE || value > i16.MAX_VALUE;\r\n          case TypeKind.U8: return value < 0 || value > u8.MAX_VALUE;\r\n          case TypeKind.U16: return value < 0 || value > u16.MAX_VALUE;\r\n          case TypeKind.BOOL: return (value & ~1) != 0;\r\n        }\r\n        break;\r\n      }\r\n\r\n      // overflows if the conversion does\r\n      case ExpressionId.Load: {\r\n        let fromType: Type;\r\n        switch (getLoadBytes(expr)) {\r\n          case 1:  { fromType = isLoadSigned(expr) ? Type.i8 : Type.u8; break; }\r\n          case 2:  { fromType = isLoadSigned(expr) ? Type.i16 : Type.u16; break; }\r\n          default: { fromType = isLoadSigned(expr) ? Type.i32 : Type.u32; break; }\r\n        }\r\n        return canConversionOverflow(fromType, type);\r\n      }\r\n\r\n      // overflows if the result does, which is either\r\n      // - the last expression of the block, by contract, if the block doesn't have a label\r\n      // - the last expression or the value of an inner br if the block has a label (TODO)\r\n      case ExpressionId.Block: {\r\n        if (!getBlockName(expr)) {\r\n          let size = assert(getBlockChildCount(expr));\r\n          let last = getBlockChild(expr, size - 1);\r\n          return this.canOverflow(last, type);\r\n        }\r\n        // actually, brs with a value that'd be handled here is not emitted atm\r\n        break;\r\n      }\r\n\r\n      // overflows if either side does\r\n      case ExpressionId.If: {\r\n        return this.canOverflow(getIfTrue(expr), type)\r\n            || this.canOverflow(assert(getIfFalse(expr)), type);\r\n      }\r\n\r\n      // overflows if either side does\r\n      case ExpressionId.Select: {\r\n        return this.canOverflow(getSelectThen(expr), type)\r\n            || this.canOverflow(getSelectElse(expr), type);\r\n      }\r\n\r\n      // overflows if the call does not return a wrapped value or the conversion does\r\n      case ExpressionId.Call: {\r\n        let program = this.currentFunction.program;\r\n        let instance = assert(program.instancesLookup.get(assert(getCallTarget(expr))));\r\n        assert(instance.kind == ElementKind.FUNCTION);\r\n        let returnType = (<Function>instance).signature.returnType;\r\n        return !(<Function>instance).flow.is(FlowFlags.RETURNS_WRAPPED)\r\n            || canConversionOverflow(returnType, type);\r\n      }\r\n\r\n      // doesn't technically overflow\r\n      case ExpressionId.Unreachable: return false;\r\n    }\r\n    return true;\r\n  }\r\n\r\n  /** Finalizes this flow. Must be the topmost parent flow of the function. */\r\n  finalize(): void {\r\n    assert(this.parent == null); // must be the topmost parent flow\r\n    this.continueLabel = null;\r\n    this.breakLabel = null;\r\n    this.returnLabel = null;\r\n    this.contextualTypeArguments = null;\r\n  }\r\n}\r\n\r\n/** Tests if a conversion from one type to another can technically overflow. */\r\nfunction canConversionOverflow(fromType: Type, toType: Type): bool {\r\n  var fromSize = fromType.byteSize;\r\n  var toSize = toType.byteSize;\r\n  return !fromType.is(TypeFlags.INTEGER) // non-i32 locals or returns\r\n      || fromSize > toSize\r\n      || fromType.is(TypeFlags.SIGNED) != toType.is(TypeFlags.SIGNED);\r\n}\r\n","/**\r\n * A thin wrapper around Binaryen's C-API.\r\n * @module module\r\n *//***/\r\n\r\nimport {\r\n  Target\r\n} from \"./compiler\";\r\n\r\nexport type ModuleRef = usize;\r\nexport type FunctionTypeRef = usize;\r\nexport type FunctionRef = usize;\r\nexport type ExpressionRef = usize;\r\nexport type GlobalRef = usize;\r\nexport type ImportRef = usize;\r\nexport type ExportRef = usize;\r\nexport type Index = u32;\r\n\r\nexport const enum NativeType {\r\n  None = 0,        // _BinaryenTypeNone(),\r\n  I32  = 1,        // _BinaryenTypeInt32(),\r\n  I64  = 2,        // _BinaryenTypeInt64(),\r\n  F32  = 3,        // _BinaryenTypeFloat32(),\r\n  F64  = 4,        // _BinaryenTypeFloat64(),\r\n  Unreachable = 5, // _BinaryenTypeUnreachable(),\r\n  Auto = -1        // _BinaryenTypeAuto()\r\n}\r\n\r\nexport enum ExpressionId {\r\n  Invalid = _BinaryenInvalidId(),\r\n  Block = _BinaryenBlockId(),\r\n  If = _BinaryenIfId(),\r\n  Loop = _BinaryenLoopId(),\r\n  Break = _BinaryenBreakId(),\r\n  Switch = _BinaryenSwitchId(),\r\n  Call = _BinaryenCallId(),\r\n  CallImport = _BinaryenCallImportId(),\r\n  CallIndirect = _BinaryenCallIndirectId(),\r\n  GetLocal = _BinaryenGetLocalId(),\r\n  SetLocal = _BinaryenSetLocalId(),\r\n  GetGlobal = _BinaryenGetGlobalId(),\r\n  SetGlobal = _BinaryenSetGlobalId(),\r\n  Load = _BinaryenLoadId(),\r\n  Store = _BinaryenStoreId(),\r\n  Const = _BinaryenConstId(),\r\n  Unary = _BinaryenUnaryId(),\r\n  Binary = _BinaryenBinaryId(),\r\n  Select = _BinaryenSelectId(),\r\n  Drop = _BinaryenDropId(),\r\n  Return = _BinaryenReturnId(),\r\n  Host = _BinaryenHostId(),\r\n  Nop = _BinaryenNopId(),\r\n  Unreachable = _BinaryenUnreachableId(),\r\n  AtomicCmpxchg = _BinaryenAtomicCmpxchgId(),\r\n  AtomicRMW = _BinaryenAtomicRMWId(),\r\n  AtomicWait = _BinaryenAtomicWaitId(),\r\n  AtomicWake = _BinaryenAtomicWakeId()\r\n}\r\n\r\nexport enum UnaryOp {\r\n  ClzI32 = _BinaryenClzInt32(),\r\n  CtzI32 = _BinaryenCtzInt32(),\r\n  PopcntI32 = _BinaryenPopcntInt32(),\r\n  NegF32 = _BinaryenNegFloat32(),\r\n  AbsF32 = _BinaryenAbsFloat32(),\r\n  CeilF32 = _BinaryenCeilFloat32(),\r\n  FloorF32 = _BinaryenFloorFloat32(),\r\n  TruncF32 = _BinaryenTruncFloat32(),\r\n  NearestF32 = _BinaryenNearestFloat32(),\r\n  SqrtF32 = _BinaryenSqrtFloat32(),\r\n  EqzI32 = _BinaryenEqZInt32(),\r\n  ClzI64 = _BinaryenClzInt64(),\r\n  CtzI64 = _BinaryenCtzInt64(),\r\n  PopcntI64 = _BinaryenPopcntInt64(),\r\n  NegF64 = _BinaryenNegFloat64(),\r\n  AbsF64 = _BinaryenAbsFloat64(),\r\n  CeilF64 = _BinaryenCeilFloat64(),\r\n  FloorF64 = _BinaryenFloorFloat64(),\r\n  TruncF64 = _BinaryenTruncFloat64(),\r\n  NearestF64 = _BinaryenNearestFloat64(),\r\n  SqrtF64 = _BinaryenSqrtFloat64(),\r\n  EqzI64 = _BinaryenEqZInt64(),\r\n  ExtendI32 = _BinaryenExtendSInt32(),\r\n  ExtendU32 = _BinaryenExtendUInt32(),\r\n  WrapI64 = _BinaryenWrapInt64(),\r\n  TruncF32ToI32 = _BinaryenTruncSFloat32ToInt32(),\r\n  TruncF32ToI64 = _BinaryenTruncSFloat32ToInt64(),\r\n  TruncF32ToU32 = _BinaryenTruncUFloat32ToInt32(),\r\n  TruncF32ToU64 = _BinaryenTruncUFloat32ToInt64(),\r\n  TruncF64ToI32 = _BinaryenTruncSFloat64ToInt32(),\r\n  TruncF64ToI64 = _BinaryenTruncSFloat64ToInt64(),\r\n  TruncF64ToU32 = _BinaryenTruncUFloat64ToInt32(),\r\n  TruncF64ToU64 = _BinaryenTruncUFloat64ToInt64(),\r\n  ReinterpretF32 = _BinaryenReinterpretFloat32(),\r\n  ReinterpretF64 = _BinaryenReinterpretFloat64(),\r\n  ConvertI32ToF32 = _BinaryenConvertSInt32ToFloat32(),\r\n  ConvertI32ToF64 = _BinaryenConvertSInt32ToFloat64(),\r\n  ConvertU32ToF32 = _BinaryenConvertUInt32ToFloat32(),\r\n  ConvertU32ToF64 = _BinaryenConvertUInt32ToFloat64(),\r\n  ConvertI64ToF32 = _BinaryenConvertSInt64ToFloat32(),\r\n  ConvertI64ToF64 = _BinaryenConvertSInt64ToFloat64(),\r\n  ConvertU64ToF32 = _BinaryenConvertUInt64ToFloat32(),\r\n  ConvertU64ToF64 = _BinaryenConvertUInt64ToFloat64(),\r\n  PromoteF32 = _BinaryenPromoteFloat32(),\r\n  DemoteF64 = _BinaryenDemoteFloat64(),\r\n  ReinterpretI32 = _BinaryenReinterpretInt32(),\r\n  ReinterpretI64 = _BinaryenReinterpretInt64(),\r\n\r\n  // see: https://github.com/WebAssembly/sign-extension-ops\r\n  ExtendI8ToI32 = _BinaryenExtendS8Int32(),\r\n  ExtendI16ToI32 = _BinaryenExtendS16Int32(),\r\n  ExtendI8ToI64 = _BinaryenExtendS8Int64(),\r\n  ExtendI16ToI64 = _BinaryenExtendS16Int64(),\r\n  ExtendI32ToI64 = _BinaryenExtendS32Int64()\r\n\r\n  // see: https://github.com/WebAssembly/nontrapping-float-to-int-conversions\r\n  // TruncF32ToI32Sat\r\n  // TruncF32ToU32Sat\r\n  // TruncF64ToI32Sat\r\n  // TruncF64ToU32Sat\r\n  // TruncF32ToI64Sat\r\n  // TruncF32ToU64Sat\r\n  // TruncF64ToI64Sat\r\n  // TruncF64ToU64Sat\r\n}\r\n\r\nexport enum BinaryOp {\r\n  AddI32 = _BinaryenAddInt32(),\r\n  SubI32 = _BinaryenSubInt32(),\r\n  MulI32 = _BinaryenMulInt32(),\r\n  DivI32 = _BinaryenDivSInt32(),\r\n  DivU32 = _BinaryenDivUInt32(),\r\n  RemI32 = _BinaryenRemSInt32(),\r\n  RemU32 = _BinaryenRemUInt32(),\r\n  AndI32 = _BinaryenAndInt32(),\r\n  OrI32 = _BinaryenOrInt32(),\r\n  XorI32 = _BinaryenXorInt32(),\r\n  ShlI32 = _BinaryenShlInt32(),\r\n  ShrU32 = _BinaryenShrUInt32(),\r\n  ShrI32 = _BinaryenShrSInt32(),\r\n  RotlI32 = _BinaryenRotLInt32(),\r\n  RotrI32 = _BinaryenRotRInt32(),\r\n  EqI32 = _BinaryenEqInt32(),\r\n  NeI32 = _BinaryenNeInt32(),\r\n  LtI32 = _BinaryenLtSInt32(),\r\n  LtU32 = _BinaryenLtUInt32(),\r\n  LeI32 = _BinaryenLeSInt32(),\r\n  LeU32 = _BinaryenLeUInt32(),\r\n  GtI32 = _BinaryenGtSInt32(),\r\n  GtU32 = _BinaryenGtUInt32(),\r\n  GeI32 = _BinaryenGeSInt32(),\r\n  GeU32 = _BinaryenGeUInt32(),\r\n  AddI64 = _BinaryenAddInt64(),\r\n  SubI64 = _BinaryenSubInt64(),\r\n  MulI64 = _BinaryenMulInt64(),\r\n  DivI64 = _BinaryenDivSInt64(),\r\n  DivU64 = _BinaryenDivUInt64(),\r\n  RemI64 = _BinaryenRemSInt64(),\r\n  RemU64 = _BinaryenRemUInt64(),\r\n  AndI64 = _BinaryenAndInt64(),\r\n  OrI64 = _BinaryenOrInt64(),\r\n  XorI64 = _BinaryenXorInt64(),\r\n  ShlI64 = _BinaryenShlInt64(),\r\n  ShrU64 = _BinaryenShrUInt64(),\r\n  ShrI64 = _BinaryenShrSInt64(),\r\n  RotlI64 = _BinaryenRotLInt64(),\r\n  RotrI64 = _BinaryenRotRInt64(),\r\n  EqI64 = _BinaryenEqInt64(),\r\n  NeI64 = _BinaryenNeInt64(),\r\n  LtI64 = _BinaryenLtSInt64(),\r\n  LtU64 = _BinaryenLtUInt64(),\r\n  LeI64 = _BinaryenLeSInt64(),\r\n  LeU64 = _BinaryenLeUInt64(),\r\n  GtI64 = _BinaryenGtSInt64(),\r\n  GtU64 = _BinaryenGtUInt64(),\r\n  GeI64 = _BinaryenGeSInt64(),\r\n  GeU64 = _BinaryenGeUInt64(),\r\n  AddF32 = _BinaryenAddFloat32(),\r\n  SubF32 = _BinaryenSubFloat32(),\r\n  MulF32 = _BinaryenMulFloat32(),\r\n  DivF32 = _BinaryenDivFloat32(),\r\n  CopysignF32 = _BinaryenCopySignFloat32(),\r\n  MinF32 = _BinaryenMinFloat32(),\r\n  MaxF32 = _BinaryenMaxFloat32(),\r\n  EqF32 = _BinaryenEqFloat32(),\r\n  NeF32 = _BinaryenNeFloat32(),\r\n  LtF32 = _BinaryenLtFloat32(),\r\n  LeF32 = _BinaryenLeFloat32(),\r\n  GtF32 = _BinaryenGtFloat32(),\r\n  GeF32 = _BinaryenGeFloat32(),\r\n  AddF64 = _BinaryenAddFloat64(),\r\n  SubF64 = _BinaryenSubFloat64(),\r\n  MulF64 = _BinaryenMulFloat64(),\r\n  DivF64 = _BinaryenDivFloat64(),\r\n  CopysignF64 = _BinaryenCopySignFloat64(),\r\n  MinF64 = _BinaryenMinFloat64(),\r\n  MaxF64 = _BinaryenMaxFloat64(),\r\n  EqF64 = _BinaryenEqFloat64(),\r\n  NeF64 = _BinaryenNeFloat64(),\r\n  LtF64 = _BinaryenLtFloat64(),\r\n  LeF64 = _BinaryenLeFloat64(),\r\n  GtF64 = _BinaryenGtFloat64(),\r\n  GeF64 = _BinaryenGeFloat64()\r\n}\r\n\r\nexport enum HostOp {\r\n  PageSize = _BinaryenPageSize(),\r\n  CurrentMemory = _BinaryenCurrentMemory(),\r\n  GrowMemory = _BinaryenGrowMemory(),\r\n  HasFeature = _BinaryenHasFeature(),\r\n\r\n  // see: https://github.com/WebAssembly/bulk-memory-operations\r\n  // MoveMemory\r\n  // SetMemory\r\n}\r\n\r\nexport enum AtomicRMWOp {\r\n  Add = _BinaryenAtomicRMWAdd(),\r\n  Sub = _BinaryenAtomicRMWSub(),\r\n  And = _BinaryenAtomicRMWAnd(),\r\n  Or = _BinaryenAtomicRMWOr(),\r\n  Xor = _BinaryenAtomicRMWXor(),\r\n  Xchg = _BinaryenAtomicRMWXchg()\r\n}\r\n\r\nexport class MemorySegment {\r\n\r\n  buffer: Uint8Array;\r\n  offset: I64;\r\n\r\n  static create(buffer: Uint8Array, offset: I64): MemorySegment {\r\n    var segment = new MemorySegment();\r\n    segment.buffer = buffer;\r\n    segment.offset = offset;\r\n    return segment;\r\n  }\r\n}\r\n\r\nexport class Module {\r\n\r\n  ref: ModuleRef;\r\n\r\n  private cachedByValue: usize;\r\n\r\n  /** Maximum number of pages when targeting WASM32. */\r\n  static readonly MAX_MEMORY_WASM32: Index = 0xffff;\r\n\r\n  /** Maximum number of pages when targeting WASM64. */\r\n  static readonly MAX_MEMORY_WASM64: Index = 0xffff; // TODO\r\n\r\n  static create(): Module {\r\n    var module = new Module();\r\n    module.ref = _BinaryenModuleCreate();\r\n    module.cachedByValue = memory.allocate(16);\r\n    return module;\r\n  }\r\n\r\n  static createFrom(buffer: Uint8Array): Module {\r\n    var cArr = allocU8Array(buffer);\r\n    try {\r\n      let module = new Module();\r\n      module.ref = _BinaryenModuleRead(cArr, buffer.length);\r\n      module.cachedByValue = memory.allocate(3 * 8); // LLVM C-ABI, max used is 3 * usize\r\n      return module;\r\n    } finally {\r\n      memory.free(changetype<usize>(cArr));\r\n    }\r\n  }\r\n\r\n  private constructor() { }\r\n\r\n  // types\r\n\r\n  addFunctionType(\r\n    name: string,\r\n    result: NativeType,\r\n    paramTypes: NativeType[] | null\r\n  ): FunctionRef {\r\n    var cStr = allocString(name);\r\n    var cArr = allocI32Array(paramTypes);\r\n    try {\r\n      return _BinaryenAddFunctionType(this.ref, cStr, result, cArr, paramTypes ? paramTypes.length : 0);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  getFunctionTypeBySignature(\r\n    result: NativeType,\r\n    paramTypes: NativeType[] | null\r\n  ): FunctionTypeRef {\r\n    var cArr = allocI32Array(paramTypes);\r\n    try {\r\n      return _BinaryenGetFunctionTypeBySignature(this.ref, result, cArr, paramTypes ? paramTypes.length : 0);\r\n    } finally {\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  removeFunctionType(name: string): void {\r\n    var cStr = allocString(name);\r\n    try {\r\n      _BinaryenRemoveFunctionType(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  // constants\r\n\r\n  createI32(value: i32): ExpressionRef {\r\n    var out = this.cachedByValue;\r\n    _BinaryenLiteralInt32(out, value);\r\n    return _BinaryenConst(this.ref, out);\r\n  }\r\n\r\n  createI64(valueLow: i32, valueHigh: i32 = 0): ExpressionRef {\r\n    var out = this.cachedByValue;\r\n    _BinaryenLiteralInt64(out, valueLow, valueHigh);\r\n    return _BinaryenConst(this.ref, out);\r\n  }\r\n\r\n  createF32(value: f32): ExpressionRef {\r\n    var out = this.cachedByValue;\r\n    _BinaryenLiteralFloat32(out, value);\r\n    return _BinaryenConst(this.ref, out);\r\n  }\r\n\r\n  createF64(value: f64): ExpressionRef {\r\n    var out = this.cachedByValue;\r\n    _BinaryenLiteralFloat64(out, value);\r\n    return _BinaryenConst(this.ref, out);\r\n  }\r\n\r\n  // expressions\r\n\r\n  createUnary(\r\n    op: UnaryOp,\r\n    expr: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenUnary(this.ref, op, expr);\r\n  }\r\n\r\n  createBinary(\r\n    op: BinaryOp,\r\n    left: ExpressionRef,\r\n    right: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenBinary(this.ref, op, left, right);\r\n  }\r\n\r\n  createHost(\r\n    op: HostOp,\r\n    name: string | null = null,\r\n    operands: ExpressionRef[] | null = null\r\n  ): ExpressionRef {\r\n    var cStr = allocString(name);\r\n    var cArr = allocPtrArray(operands);\r\n    try {\r\n      return _BinaryenHost(this.ref, op, cStr, cArr, operands ? (<ExpressionRef[]>operands).length : 0);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createGetLocal(\r\n    index: i32,\r\n    type: NativeType\r\n  ): ExpressionRef {\r\n    return _BinaryenGetLocal(this.ref, index, type);\r\n  }\r\n\r\n  createTeeLocal(\r\n    index: i32,\r\n    value: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenTeeLocal(this.ref, index, value);\r\n  }\r\n\r\n  createGetGlobal(\r\n    name: string,\r\n    type: NativeType\r\n  ): ExpressionRef {\r\n    var cStr = allocString(name);\r\n    try {\r\n      return _BinaryenGetGlobal(this.ref, cStr, type);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createLoad(\r\n    bytes: Index,\r\n    signed: bool,\r\n    ptr: ExpressionRef,\r\n    type: NativeType,\r\n    offset: Index = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenLoad(this.ref, bytes, signed ? 1 : 0, offset, /* always aligned */ bytes, type, ptr);\r\n  }\r\n\r\n  createStore(\r\n    bytes: Index,\r\n    ptr: ExpressionRef,\r\n    value: ExpressionRef,\r\n    type: NativeType,\r\n    offset: Index = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenStore(this.ref, bytes, offset, /* always aligned */ bytes, ptr, value, type);\r\n  }\r\n\r\n  createAtomicLoad(\r\n    bytes: Index,\r\n    ptr: ExpressionRef,\r\n    type: NativeType,\r\n    offset: Index = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicLoad(this.ref, bytes, offset, type, ptr);\r\n  }\r\n\r\n  createAtomicStore(\r\n    bytes: Index,\r\n    ptr: ExpressionRef,\r\n    value: ExpressionRef,\r\n    type: NativeType,\r\n    offset: Index = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicStore(this.ref, bytes, offset, ptr, value, type);\r\n  }\r\n\r\n  createAtomicRMW(\r\n    op: AtomicRMWOp,\r\n    bytes: Index,\r\n    offset: Index,\r\n    ptr: ExpressionRef,\r\n    value: ExpressionRef,\r\n    type: NativeType\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicRMW(this.ref, op, bytes, offset, ptr, value, type);\r\n  }\r\n\r\n  createAtomicCmpxchg(\r\n    bytes: Index,\r\n    offset: Index,\r\n    ptr: ExpressionRef,\r\n    expected: ExpressionRef,\r\n    replacement: ExpressionRef,\r\n    type: NativeType\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicCmpxchg(this.ref, bytes, offset, ptr, expected, replacement, type);\r\n  }\r\n\r\n  createAtomicWait(\r\n    ptr: ExpressionRef,\r\n    expected: ExpressionRef,\r\n    timeout: ExpressionRef,\r\n    expectedType: NativeType\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicWait(this.ref, ptr, expected, timeout, expectedType);\r\n  }\r\n\r\n  createAtomicWake(\r\n    ptr: ExpressionRef,\r\n    wakeCount: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicWake(this.ref, ptr, wakeCount);\r\n  }\r\n\r\n  // statements\r\n\r\n  createSetLocal(\r\n    index: Index,\r\n    value: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenSetLocal(this.ref, index, value);\r\n  }\r\n\r\n  createSetGlobal(\r\n    name: string,\r\n    value: ExpressionRef\r\n  ): ExpressionRef {\r\n    var cStr = allocString(name);\r\n    try {\r\n      return _BinaryenSetGlobal(this.ref, cStr, value);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createBlock(\r\n    label: string | null,\r\n    children: ExpressionRef[],\r\n    type: NativeType = NativeType.None\r\n  ): ExpressionRef {\r\n    var cStr = allocString(label);\r\n    var cArr = allocPtrArray(children);\r\n    try {\r\n      return _BinaryenBlock(this.ref, cStr, cArr, children.length, type);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createBreak(\r\n    label: string | null,\r\n    condition: ExpressionRef = 0,\r\n    value: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    var cStr = allocString(label);\r\n    try {\r\n      return _BinaryenBreak(this.ref, cStr, condition, value);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createDrop(\r\n    expression: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenDrop(this.ref, expression);\r\n  }\r\n\r\n  createLoop(\r\n    label: string | null,\r\n    body: ExpressionRef\r\n  ): ExpressionRef {\r\n    var cStr = allocString(label);\r\n    try {\r\n      return _BinaryenLoop(this.ref, cStr, body);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createIf(\r\n    condition: ExpressionRef,\r\n    ifTrue: ExpressionRef,\r\n    ifFalse: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenIf(this.ref, condition, ifTrue, ifFalse);\r\n  }\r\n\r\n  createNop(): ExpressionRef {\r\n    return _BinaryenNop(this.ref);\r\n  }\r\n\r\n  createReturn(\r\n    expression: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenReturn(this.ref, expression);\r\n  }\r\n\r\n  createSelect(\r\n    ifTrue: ExpressionRef,\r\n    ifFalse: ExpressionRef,\r\n    condition: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenSelect(this.ref, condition, ifTrue, ifFalse);\r\n  }\r\n\r\n  createSwitch(\r\n    names: string[],\r\n    defaultName: string | null,\r\n    condition: ExpressionRef,\r\n    value: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    var numNames = names.length;\r\n    var strs = new Array<usize>(numNames);\r\n    for (let i = 0; i < numNames; ++i) {\r\n      strs[i] = allocString(names[i]);\r\n    }\r\n    var cArr = allocI32Array(strs);\r\n    var cStr = allocString(defaultName);\r\n    try {\r\n      return _BinaryenSwitch(this.ref, cArr, numNames, cStr, condition, value);\r\n    } finally {\r\n      memory.free(cStr);\r\n      memory.free(cArr);\r\n      for (let i = numNames - 1; i >= 0; --i) memory.free(strs[i]);\r\n    }\r\n  }\r\n\r\n  createCall(\r\n    target: string,\r\n    operands: ExpressionRef[] | null,\r\n    returnType: NativeType\r\n  ): ExpressionRef {\r\n    var cStr = allocString(target);\r\n    var cArr = allocPtrArray(operands);\r\n    try {\r\n      return _BinaryenCall(this.ref, cStr, cArr, operands && operands.length || 0, returnType);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createCallImport(\r\n    target: string,\r\n    operands: ExpressionRef[] | null,\r\n    returnType: NativeType\r\n  ): ExpressionRef {\r\n    var cStr = allocString(target);\r\n    var cArr = allocPtrArray(operands);\r\n    try {\r\n      return _BinaryenCallImport(this.ref, cStr, cArr, operands && operands.length || 0, returnType);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createCallIndirect(\r\n    index: ExpressionRef,\r\n    operands: ExpressionRef[] | null,\r\n    typeName: string\r\n  ): ExpressionRef {\r\n    var cArr = allocPtrArray(operands);\r\n    var cStr = allocString(typeName);\r\n    try {\r\n      return _BinaryenCallIndirect(this.ref, index, cArr, operands && operands.length || 0, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  createUnreachable(): ExpressionRef {\r\n    return _BinaryenUnreachable(this.ref);\r\n  }\r\n\r\n  // meta\r\n\r\n  addGlobal(\r\n    name: string,\r\n    type: NativeType,\r\n    mutable: bool,\r\n    initializer: ExpressionRef\r\n  ): GlobalRef {\r\n    var cStr = allocString(name);\r\n    try {\r\n      return _BinaryenAddGlobal(this.ref, cStr, type, mutable ? 1 : 0, initializer);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  addFunction(\r\n    name: string,\r\n    type: FunctionTypeRef,\r\n    varTypes: NativeType[] | null,\r\n    body: ExpressionRef\r\n  ): FunctionRef {\r\n    var cStr = allocString(name);\r\n    var cArr = allocI32Array(varTypes);\r\n    try {\r\n      return _BinaryenAddFunction(this.ref, cStr, type, cArr, varTypes ? varTypes.length : 0, body);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  removeFunction(name: string): void {\r\n    var cStr = allocString(name);\r\n    try {\r\n      _BinaryenRemoveFunction(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  private cachedTemporaryName: usize = 0;\r\n  private hasTemporaryFunction: bool = false;\r\n\r\n  addTemporaryFunction(result: NativeType, paramTypes: NativeType[] | null, body: ExpressionRef): FunctionRef {\r\n    this.hasTemporaryFunction = assert(!this.hasTemporaryFunction);\r\n    var tempName = this.cachedTemporaryName;\r\n    if (!tempName) this.cachedTemporaryName = tempName = allocString(\"\"); // works because strings are interned\r\n    var cArr = allocI32Array(paramTypes);\r\n    try {\r\n      let typeRef = _BinaryenAddFunctionType(this.ref, tempName, result, cArr, paramTypes ? paramTypes.length : 0);\r\n      return _BinaryenAddFunction(this.ref, tempName, typeRef, 0, 0, body);\r\n    } finally {\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  removeTemporaryFunction(): void {\r\n    this.hasTemporaryFunction = !assert(this.hasTemporaryFunction);\r\n    var tempName = assert(this.cachedTemporaryName);\r\n    _BinaryenRemoveFunction(this.ref, tempName);\r\n    _BinaryenRemoveFunctionType(this.ref, tempName);\r\n  }\r\n\r\n  addFunctionExport(\r\n    internalName: string,\r\n    externalName: string\r\n  ): ExportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalName);\r\n    try {\r\n      return _BinaryenAddFunctionExport(this.ref, cStr1, cStr2);\r\n    } finally {\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addTableExport(\r\n    internalName: string,\r\n    externalName: string\r\n  ): ExportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalName);\r\n    try {\r\n      return _BinaryenAddTableExport(this.ref, cStr1, cStr2);\r\n    } finally {\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addMemoryExport(\r\n    internalName: string,\r\n    externalName: string\r\n  ): ExportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalName);\r\n    try {\r\n      return _BinaryenAddMemoryExport(this.ref, cStr1, cStr2);\r\n    } finally {\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addGlobalExport(\r\n    internalName: string,\r\n    externalName: string\r\n  ): ExportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalName);\r\n    try {\r\n      return _BinaryenAddGlobalExport(this.ref, cStr1, cStr2);\r\n    } finally {\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  removeExport(externalName: string): void {\r\n    var cStr = allocString(externalName);\r\n    try {\r\n      _BinaryenRemoveExport(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  addFunctionImport(\r\n    internalName: string,\r\n    externalModuleName: string,\r\n    externalBaseName: string,\r\n    functionType: FunctionTypeRef\r\n  ): ImportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalModuleName);\r\n    var cStr3 = allocString(externalBaseName);\r\n    try {\r\n      return _BinaryenAddFunctionImport(this.ref, cStr1, cStr2, cStr3, functionType);\r\n    } finally {\r\n      memory.free(cStr3);\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addTableImport(\r\n    internalName: string,\r\n    externalModuleName: string,\r\n    externalBaseName: string\r\n  ): ImportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalModuleName);\r\n    var cStr3 = allocString(externalBaseName);\r\n    try {\r\n      return _BinaryenAddTableImport(this.ref, cStr1, cStr2, cStr3);\r\n    } finally {\r\n      memory.free(cStr3);\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addMemoryImport(\r\n    internalName: string,\r\n    externalModuleName: string,\r\n    externalBaseName: string\r\n  ): ImportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalModuleName);\r\n    var cStr3 = allocString(externalBaseName);\r\n    try {\r\n      return _BinaryenAddMemoryImport(this.ref, cStr1, cStr2, cStr3);\r\n    } finally {\r\n      memory.free(cStr3);\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addGlobalImport(\r\n    internalName: string,\r\n    externalModuleName: string,\r\n    externalBaseName: string,\r\n    globalType: NativeType\r\n  ): ImportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalModuleName);\r\n    var cStr3 = allocString(externalBaseName);\r\n    try {\r\n      return _BinaryenAddGlobalImport(this.ref, cStr1, cStr2, cStr3, globalType);\r\n    } finally {\r\n      memory.free(cStr3);\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  removeImport(internalName: string): void {\r\n    var cStr = allocString(internalName);\r\n    try {\r\n      _BinaryenRemoveImport(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  setMemory(\r\n    initial: Index,\r\n    maximum: Index,\r\n    segments: MemorySegment[],\r\n    target: Target,\r\n    exportName: string | null = null\r\n  ): void {\r\n    var cStr = allocString(exportName);\r\n    var k = segments.length;\r\n    var segs = new Array<usize>(k);\r\n    var offs = new Array<ExpressionRef>(k);\r\n    var sizs = new Array<Index>(k);\r\n    for (let i = 0; i < k; ++i) {\r\n      let buffer = segments[i].buffer;\r\n      let offset = segments[i].offset;\r\n      segs[i] = allocU8Array(buffer);\r\n      offs[i] = target == Target.WASM64\r\n        ? this.createI64(i64_low(offset), i64_high(offset))\r\n        : this.createI32(i64_low(offset));\r\n      sizs[i] = buffer.length;\r\n    }\r\n    var cArr1 = allocI32Array(segs);\r\n    var cArr2 = allocI32Array(offs);\r\n    var cArr3 = allocI32Array(sizs);\r\n    try {\r\n      _BinaryenSetMemory(this.ref, initial, maximum, cStr, cArr1, cArr2, cArr3, k);\r\n    } finally {\r\n      memory.free(cArr3);\r\n      memory.free(cArr2);\r\n      memory.free(cArr1);\r\n      for (let i = k - 1; i >= 0; --i) memory.free(segs[i]);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  setFunctionTable(funcs: FunctionRef[]): void {\r\n    var cArr = allocPtrArray(funcs);\r\n    try {\r\n      _BinaryenSetFunctionTable(this.ref, cArr, funcs.length);\r\n    } finally {\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  setStart(func: FunctionRef): void {\r\n    _BinaryenSetStart(this.ref, func);\r\n  }\r\n\r\n  getOptimizeLevel(): i32 {\r\n    return _BinaryenGetOptimizeLevel();\r\n  }\r\n\r\n  setOptimizeLevel(level: i32 = 2): void {\r\n    _BinaryenSetOptimizeLevel(level);\r\n  }\r\n\r\n  getShrinkLevel(): i32 {\r\n    return _BinaryenGetShrinkLevel();\r\n  }\r\n\r\n  setShrinkLevel(level: i32 = 1): void {\r\n    _BinaryenSetShrinkLevel(level);\r\n  }\r\n\r\n  setDebugInfo(on: bool = false): void {\r\n    _BinaryenSetDebugInfo(on);\r\n  }\r\n\r\n  optimize(func: FunctionRef = 0): void {\r\n    if (func) {\r\n      _BinaryenFunctionOptimize(func, this.ref);\r\n    } else {\r\n      _BinaryenModuleOptimize(this.ref);\r\n    }\r\n  }\r\n\r\n  runPasses(passes: string[], func: FunctionRef = 0): void {\r\n    var numNames = passes.length;\r\n    var names = new Array<usize>(numNames);\r\n    for (let i = 0; i < numNames; ++i) {\r\n      names[i] = allocString(passes[i]);\r\n    }\r\n    var cArr = allocI32Array(names);\r\n    try {\r\n      if (func) {\r\n        _BinaryenFunctionRunPasses(func, this.ref, cArr, numNames);\r\n      } else {\r\n        _BinaryenModuleRunPasses(this.ref, cArr, numNames);\r\n      }\r\n    } finally {\r\n      memory.free(cArr);\r\n      for (let i = numNames; i >= 0; --i) memory.free(names[i]);\r\n    }\r\n  }\r\n\r\n  private cachedPrecomputeName: usize = 0; // for free'ing\r\n  private cachedPrecomputeNames: usize = 0;\r\n\r\n  precomputeExpression(expr: ExpressionRef): ExpressionRef {\r\n    // remember the previous optimize levels and set to max instead, to be sure\r\n    var previousOptimizeLevel = _BinaryenGetOptimizeLevel();\r\n    var previousShrinkLevel = _BinaryenGetShrinkLevel();\r\n    var previousDebugInfo = _BinaryenGetDebugInfo();\r\n    _BinaryenSetOptimizeLevel(4);\r\n    _BinaryenSetShrinkLevel(0);\r\n    _BinaryenSetDebugInfo(false);\r\n\r\n    // wrap the expression in a temp. function and run the precompute pass on it\r\n    var type = _BinaryenExpressionGetType(expr);\r\n    var func = this.addTemporaryFunction(type, null, expr);\r\n    var names = this.cachedPrecomputeNames;\r\n    if (!names) {\r\n      let name = allocString(\"precompute\");\r\n      this.cachedPrecomputeName = name;\r\n      this.cachedPrecomputeNames = names = allocI32Array([ name ]);\r\n    }\r\n    _BinaryenFunctionRunPasses(func, this.ref, names, 1);\r\n    expr = _BinaryenFunctionGetBody(func);\r\n    this.removeTemporaryFunction();\r\n\r\n    // reset optimize levels to previous\r\n    _BinaryenSetOptimizeLevel(previousOptimizeLevel);\r\n    _BinaryenSetShrinkLevel(previousShrinkLevel);\r\n    _BinaryenSetDebugInfo(previousDebugInfo);\r\n    return expr;\r\n  }\r\n\r\n  validate(): bool {\r\n    return _BinaryenModuleValidate(this.ref) == 1;\r\n  }\r\n\r\n  interpret(): void {\r\n    _BinaryenModuleInterpret(this.ref);\r\n  }\r\n\r\n  toBinary(sourceMapUrl: string | null): BinaryModule {\r\n    var out = this.cachedByValue;\r\n    var cStr = allocString(sourceMapUrl);\r\n    var binaryPtr: usize = 0;\r\n    var sourceMapPtr: usize = 0;\r\n    try {\r\n      _BinaryenModuleAllocateAndWrite(out, this.ref, cStr);\r\n      binaryPtr = readInt(out);\r\n      let binaryBytes = readInt(out + 4);\r\n      sourceMapPtr = readInt(out + 4 * 2);\r\n      let ret = new BinaryModule();\r\n      ret.output = readBuffer(binaryPtr, binaryBytes);\r\n      ret.sourceMap = readString(sourceMapPtr);\r\n      return ret;\r\n    } finally {\r\n      if (cStr) memory.free(cStr);\r\n      if (binaryPtr) memory.free(binaryPtr);\r\n      if (sourceMapPtr) memory.free(sourceMapPtr);\r\n    }\r\n  }\r\n\r\n  toText(): string {\r\n    throw new Error(\"not implemented\"); // JS glue overrides this\r\n  }\r\n\r\n  toAsmjs(): string {\r\n    throw new Error(\"not implemented\"); // JS glue overrides this\r\n  }\r\n\r\n  dispose(): void {\r\n    assert(this.ref);\r\n    memory.free(this.cachedByValue);\r\n    memory.free(this.cachedTemporaryName);\r\n    memory.free(this.cachedPrecomputeName);\r\n    memory.free(this.cachedPrecomputeNames);\r\n    _BinaryenModuleDispose(this.ref);\r\n    this.ref = 0;\r\n  }\r\n\r\n  createRelooper(): Relooper {\r\n    return Relooper.create(this);\r\n  }\r\n\r\n  cloneExpression(\r\n    expr: ExpressionRef,\r\n    noSideEffects: bool = false,\r\n    maxDepth: i32 = i32.MAX_VALUE\r\n  ): ExpressionRef { // currently supports side effect free expressions only\r\n    if (maxDepth < 0) return 0;\r\n    maxDepth -= 1;\r\n\r\n    var nested1: ExpressionRef,\r\n        nested2: ExpressionRef;\r\n\r\n        switch (_BinaryenExpressionGetId(expr)) {\r\n      case ExpressionId.Const: {\r\n        switch (_BinaryenExpressionGetType(expr)) {\r\n          case NativeType.I32: {\r\n            return this.createI32(_BinaryenConstGetValueI32(expr));\r\n          }\r\n          case NativeType.I64: {\r\n            return this.createI64(\r\n              _BinaryenConstGetValueI64Low(expr),\r\n              _BinaryenConstGetValueI64High(expr)\r\n            );\r\n          }\r\n          case NativeType.F32: {\r\n            return this.createF32(_BinaryenConstGetValueF32(expr));\r\n          }\r\n          case NativeType.F64: {\r\n            return this.createF64(_BinaryenConstGetValueF64(expr));\r\n          }\r\n          default: {\r\n            throw new Error(\"concrete type expected\");\r\n          }\r\n        }\r\n      }\r\n      case ExpressionId.GetLocal: {\r\n        return _BinaryenGetLocal(this.ref,\r\n          _BinaryenGetLocalGetIndex(expr),\r\n          _BinaryenExpressionGetType(expr)\r\n        );\r\n      }\r\n      case ExpressionId.GetGlobal: {\r\n        let globalName = _BinaryenGetGlobalGetName(expr);\r\n        if (!globalName) break;\r\n        return _BinaryenGetGlobal(this.ref, globalName, _BinaryenExpressionGetType(expr));\r\n      }\r\n      case ExpressionId.Load: {\r\n        if (!(nested1 = this.cloneExpression(_BinaryenLoadGetPtr(expr), noSideEffects, maxDepth))) {\r\n          break;\r\n        }\r\n        return (\r\n          _BinaryenLoadIsAtomic(expr)\r\n            ? _BinaryenAtomicLoad(this.ref,\r\n                _BinaryenLoadGetBytes(expr),\r\n                _BinaryenLoadGetOffset(expr),\r\n                _BinaryenExpressionGetType(expr),\r\n                nested1\r\n              )\r\n            : _BinaryenLoad(this.ref,\r\n                _BinaryenLoadGetBytes(expr),\r\n                _BinaryenLoadIsSigned(expr) ? 1 : 0,\r\n                _BinaryenLoadGetOffset(expr),\r\n                _BinaryenLoadGetAlign(expr),\r\n                _BinaryenExpressionGetType(expr),\r\n                nested1\r\n              )\r\n        );\r\n      }\r\n      case ExpressionId.Unary: {\r\n        if (!(nested1 = this.cloneExpression(_BinaryenUnaryGetValue(expr), noSideEffects, maxDepth))) {\r\n          break;\r\n        }\r\n        return _BinaryenUnary(this.ref, _BinaryenUnaryGetOp(expr), nested1);\r\n      }\r\n      case ExpressionId.Binary: {\r\n        if (!(nested1 = this.cloneExpression(_BinaryenBinaryGetLeft(expr), noSideEffects, maxDepth))) {\r\n          break;\r\n        }\r\n        if (!(nested2 = this.cloneExpression(_BinaryenBinaryGetRight(expr), noSideEffects, maxDepth))) {\r\n          break;\r\n        }\r\n        return _BinaryenBinary(this.ref, _BinaryenBinaryGetOp(expr), nested1, nested2);\r\n      }\r\n    }\r\n    return 0;\r\n  }\r\n\r\n  // source map generation\r\n\r\n  addDebugInfoFile(name: string): Index {\r\n    var cStr = allocString(name);\r\n    try {\r\n      return _BinaryenModuleAddDebugInfoFileName(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  getDebugInfoFile(index: Index): string | null {\r\n    return readString(_BinaryenModuleGetDebugInfoFileName(this.ref, index));\r\n  }\r\n\r\n  setDebugLocation(\r\n    func: FunctionRef,\r\n    expr: ExpressionRef,\r\n    fileIndex: Index,\r\n    lineNumber: Index,\r\n    columnNumber: Index\r\n  ): void {\r\n    _BinaryenFunctionSetDebugLocation(func, expr, fileIndex, lineNumber, columnNumber);\r\n  }\r\n}\r\n\r\n// expressions\r\n\r\nexport function getExpressionId(expr: ExpressionRef): ExpressionId {\r\n  return _BinaryenExpressionGetId(expr);\r\n}\r\n\r\nexport function getExpressionType(expr: ExpressionRef): NativeType {\r\n  return _BinaryenExpressionGetType(expr);\r\n}\r\n\r\nexport function getConstValueI32(expr: ExpressionRef): i32 {\r\n  return _BinaryenConstGetValueI32(expr);\r\n}\r\n\r\nexport function getConstValueI64Low(expr: ExpressionRef): i32 {\r\n  return _BinaryenConstGetValueI64Low(expr);\r\n}\r\n\r\nexport function getConstValueI64High(expr: ExpressionRef): i32 {\r\n  return _BinaryenConstGetValueI64High(expr);\r\n}\r\n\r\nexport function getConstValueF32(expr: ExpressionRef): f32 {\r\n  return _BinaryenConstGetValueF32(expr);\r\n}\r\n\r\nexport function getConstValueF64(expr: ExpressionRef): f32 {\r\n  return _BinaryenConstGetValueF64(expr);\r\n}\r\n\r\nexport function getGetLocalIndex(expr: ExpressionRef): Index {\r\n  return _BinaryenGetLocalGetIndex(expr);\r\n}\r\n\r\nexport function getSetLocalIndex(expr: ExpressionRef): Index {\r\n  return _BinaryenSetLocalGetIndex(expr);\r\n}\r\n\r\nexport function getSetLocalValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenSetLocalGetValue(expr);\r\n}\r\n\r\nexport function isTeeLocal(expr: ExpressionRef): bool {\r\n  return _BinaryenSetLocalIsTee(expr);\r\n}\r\n\r\nexport function getBinaryOp(expr: ExpressionRef): BinaryOp {\r\n  return _BinaryenBinaryGetOp(expr);\r\n}\r\n\r\nexport function getBinaryLeft(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenBinaryGetLeft(expr);\r\n}\r\n\r\nexport function getBinaryRight(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenBinaryGetRight(expr);\r\n}\r\n\r\nexport function getUnaryOp(expr: ExpressionRef): UnaryOp {\r\n  return _BinaryenUnaryGetOp(expr);\r\n}\r\n\r\nexport function getUnaryValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenUnaryGetValue(expr);\r\n}\r\n\r\nexport function getLoadBytes(expr: ExpressionRef): u32 {\r\n  return _BinaryenLoadGetBytes(expr);\r\n}\r\n\r\nexport function getLoadOffset(expr: ExpressionRef): u32 {\r\n  return _BinaryenLoadGetOffset(expr);\r\n}\r\n\r\nexport function getLoadPtr(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenLoadGetPtr(expr);\r\n}\r\n\r\nexport function isLoadSigned(expr: ExpressionRef): bool {\r\n  return _BinaryenLoadIsSigned(expr);\r\n}\r\n\r\nexport function getStoreBytes(expr: ExpressionRef): u32 {\r\n  return _BinaryenStoreGetBytes(expr);\r\n}\r\n\r\nexport function getStoreOffset(expr: ExpressionRef): u32 {\r\n  return _BinaryenStoreGetOffset(expr);\r\n}\r\n\r\nexport function getStorePtr(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenStoreGetPtr(expr);\r\n}\r\n\r\nexport function getStoreValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenStoreGetValue(expr);\r\n}\r\n\r\nexport function getBlockName(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenBlockGetName(expr));\r\n}\r\n\r\nexport function getBlockChildCount(expr: ExpressionRef): Index {\r\n  return _BinaryenBlockGetNumChildren(expr);\r\n}\r\n\r\nexport function getBlockChild(expr: ExpressionRef, index: Index): ExpressionRef {\r\n  return _BinaryenBlockGetChild(expr, index);\r\n}\r\n\r\nexport function getIfCondition(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenIfGetCondition(expr);\r\n}\r\n\r\nexport function getIfTrue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenIfGetIfTrue(expr);\r\n}\r\n\r\nexport function getIfFalse(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenIfGetIfFalse(expr);\r\n}\r\n\r\nexport function getLoopName(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenLoopGetName(expr));\r\n}\r\n\r\nexport function getLoopBody(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenLoopGetBody(expr);\r\n}\r\n\r\nexport function getBreakName(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenBreakGetName(expr));\r\n}\r\n\r\nexport function getBreakCondition(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenBreakGetCondition(expr);\r\n}\r\n\r\nexport function getSelectThen(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenSelectGetIfTrue(expr);\r\n}\r\n\r\nexport function getSelectElse(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenSelectGetIfFalse(expr);\r\n}\r\n\r\nexport function getSelectCondition(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenSelectGetCondition(expr);\r\n}\r\n\r\nexport function getDropValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenDropGetValue(expr);\r\n}\r\n\r\nexport function getReturnValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenReturnGetValue(expr);\r\n}\r\n\r\nexport function getCallTarget(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenCallGetTarget(expr));\r\n}\r\n\r\nexport function getHostOp(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenHostGetOp(expr);\r\n}\r\n\r\nexport function getHostOperandCount(expr: ExpressionRef): Index {\r\n  return _BinaryenHostGetNumOperands(expr);\r\n}\r\n\r\nexport function getHostOperand(expr: ExpressionRef, index: Index): ExpressionRef {\r\n  return _BinaryenHostGetOperand(expr, index);\r\n}\r\n\r\nexport function getHostName(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenHostGetNameOperand(expr));\r\n}\r\n\r\n// functions\r\n\r\nexport function getFunctionBody(func: FunctionRef): ExpressionRef {\r\n  return _BinaryenFunctionGetBody(func);\r\n}\r\n\r\nexport function getFunctionName(func: FunctionRef): string | null {\r\n  return readString(_BinaryenFunctionGetName(func));\r\n}\r\n\r\nexport function getFunctionParamCount(func: FunctionRef): Index {\r\n  return _BinaryenFunctionGetNumParams(func);\r\n}\r\n\r\nexport function getFunctionParamType(func: FunctionRef, index: Index): NativeType {\r\n  return _BinaryenFunctionGetParam(func, index);\r\n}\r\n\r\nexport function getFunctionResultType(func: FunctionRef): NativeType {\r\n  return _BinaryenFunctionGetResult(func);\r\n}\r\n\r\nexport class Relooper {\r\n\r\n  module: Module;\r\n  ref: RelooperRef;\r\n\r\n  static create(module: Module): Relooper {\r\n    var relooper = new Relooper();\r\n    relooper.module = module;\r\n    relooper.ref = _RelooperCreate();\r\n    return relooper;\r\n  }\r\n\r\n  private constructor() {}\r\n\r\n  addBlock(code: ExpressionRef): RelooperBlockRef {\r\n    return _RelooperAddBlock(this.ref, code);\r\n  }\r\n\r\n  addBranch(from: RelooperBlockRef, to: RelooperBlockRef, condition: ExpressionRef = 0, code: ExpressionRef = 0): void {\r\n    _RelooperAddBranch(from, to, condition, code);\r\n  }\r\n\r\n  addBlockWithSwitch(code: ExpressionRef, condition: ExpressionRef): RelooperBlockRef {\r\n    return _RelooperAddBlockWithSwitch(this.ref, code, condition);\r\n  }\r\n\r\n  addBranchForSwitch(from: RelooperBlockRef, to: RelooperBlockRef, indexes: i32[], code: ExpressionRef = 0): void {\r\n    var cArr = allocI32Array(indexes);\r\n    try {\r\n      _RelooperAddBranchForSwitch(from, to, cArr, indexes.length, code);\r\n    } finally {\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  renderAndDispose(entry: RelooperBlockRef, labelHelper: Index): ExpressionRef {\r\n    return _RelooperRenderAndDispose(this.ref, entry, labelHelper, this.module.ref);\r\n  }\r\n}\r\n\r\n// export function hasSideEffects(expr: ExpressionRef): bool {\r\n//   switch (_BinaryenExpressionGetId(expr = getPtr(expr))) {\r\n//     case ExpressionId.GetLocal:\r\n//     case ExpressionId.GetGlobal:\r\n//     case ExpressionId.Const:\r\n//     case ExpressionId.Nop:\r\n//     case ExpressionId.Unreachable: {\r\n//       return false;\r\n//     }\r\n//     case ExpressionId.Block: {\r\n//       for (let i = 0, k = _BinaryenBlockGetNumChildren(expr); i < k; ++i) {\r\n//         if (hasSideEffects(_BinaryenBlockGetChild(expr, i))) return true;\r\n//       }\r\n//       return false;\r\n//     }\r\n//     case ExpressionId.If: {\r\n//       return hasSideEffects(_BinaryenIfGetCondition(expr))\r\n//           || hasSideEffects(_BinaryenIfGetIfTrue(expr))\r\n//           || hasSideEffects(_BinaryenIfGetIfFalse(expr));\r\n//     }\r\n//     case ExpressionId.Unary: {\r\n//       return hasSideEffects(_BinaryenUnaryGetValue(expr));\r\n//     }\r\n//     case ExpressionId.Binary: {\r\n//       return hasSideEffects(_BinaryenBinaryGetLeft(expr))\r\n//           || hasSideEffects(_BinaryenBinaryGetRight(expr));\r\n//     }\r\n//     case ExpressionId.Drop: {\r\n//       return hasSideEffects(_BinaryenDropGetValue(expr));\r\n//     }\r\n//     case ExpressionId.Select: {\r\n//       return hasSideEffects(_BinaryenSelectGetIfTrue(expr))\r\n//           || hasSideEffects(_BinaryenSelectGetIfFalse(expr))\r\n//           || hasSideEffects(_BinaryenSelectGetCondition(expr));\r\n//     }\r\n//   }\r\n//   return true;\r\n// }\r\n\r\n// helpers\r\n// can't do stack allocation here: STACKTOP is a global in WASM but a hidden variable in asm.js\r\n\r\nfunction allocU8Array(u8s: Uint8Array | null): usize {\r\n  if (!u8s) return 0;\r\n  var numValues = u8s.length;\r\n  var ptr = memory.allocate(numValues);\r\n  var idx = ptr;\r\n  for (let i = 0; i < numValues; ++i) {\r\n    store<u8>(idx++, u8s[i]);\r\n  }\r\n  return ptr;\r\n}\r\n\r\nfunction allocI32Array(i32s: i32[] | null): usize {\r\n  if (!i32s) return 0;\r\n  var ptr = memory.allocate(i32s.length << 2);\r\n  var idx = ptr;\r\n  for (let i = 0, k = i32s.length; i < k; ++i) {\r\n    let val = i32s[i];\r\n    // store<i32>(idx, val) is not portable\r\n    store<u8>(idx    , ( val         & 0xff) as u8);\r\n    store<u8>(idx + 1, ((val >>   8) & 0xff) as u8);\r\n    store<u8>(idx + 2, ((val >>  16) & 0xff) as u8);\r\n    store<u8>(idx + 3, ( val >>> 24        ) as u8);\r\n    idx += 4;\r\n  }\r\n  return ptr;\r\n}\r\n\r\nfunction allocPtrArray(ptrs: usize[] | null): usize {\r\n  return allocI32Array(ptrs); // TODO: WASM64 one day\r\n}\r\n\r\nfunction stringLengthUTF8(str: string): usize {\r\n  var len = 0;\r\n  for (let i = 0, k = str.length; i < k; ++i) {\r\n    let u = str.charCodeAt(i);\r\n    if (u >= 0xD800 && u <= 0xDFFF && i + 1 < k) {\r\n      u = 0x10000 + ((u & 0x3FF) << 10) | (str.charCodeAt(++i) & 0x3FF);\r\n    }\r\n    if (u <= 0x7F) {\r\n      ++len;\r\n    } else if (u <= 0x7FF) {\r\n      len += 2;\r\n    } else if (u <= 0xFFFF) {\r\n      len += 3;\r\n    } else if (u <= 0x1FFFFF) {\r\n      len += 4;\r\n    } else if (u <= 0x3FFFFFF) {\r\n      len += 5;\r\n    } else {\r\n      len += 6;\r\n    }\r\n  }\r\n  return len;\r\n}\r\n\r\nfunction allocString(str: string | null): usize {\r\n  if (str == null) return 0;\r\n  var ptr = memory.allocate(stringLengthUTF8(str) + 1);\r\n  // the following is based on Emscripten's stringToUTF8Array\r\n  var idx = ptr;\r\n  for (let i = 0, k = str.length; i < k; ++i) {\r\n    let u = str.charCodeAt(i);\r\n    if (u >= 0xD800 && u <= 0xDFFF && i + 1 < k) {\r\n      u = 0x10000 + ((u & 0x3FF) << 10) | (str.charCodeAt(++i) & 0x3FF);\r\n    }\r\n    if (u <= 0x7F) {\r\n      store<u8>(idx++, u as u8);\r\n    } else if (u <= 0x7FF) {\r\n      store<u8>(idx++, (0xC0 |  (u >>> 6)       ) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    } else if (u <= 0xFFFF) {\r\n      store<u8>(idx++, (0xE0 |  (u >>> 12)      ) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>>  6) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    } else if (u <= 0x1FFFFF) {\r\n      store<u8>(idx++, (0xF0 |  (u >>> 18)      ) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 12) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>>  6) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    } else if (u <= 0x3FFFFFF) {\r\n      store<u8>(idx++, (0xF8 |  (u >>> 24)      ) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 18) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 12) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>>  6) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    } else {\r\n      store<u8>(idx++, (0xFC |  (u >>> 30)      ) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 24) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 18) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 12) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>>  6) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    }\r\n  }\r\n  store<u8>(idx, 0);\r\n  return ptr;\r\n}\r\n\r\nfunction readInt(ptr: usize): i32 {\r\n  return (\r\n     load<u8>(ptr    )        |\r\n    (load<u8>(ptr + 1) <<  8) |\r\n    (load<u8>(ptr + 2) << 16) |\r\n    (load<u8>(ptr + 3) << 24)\r\n  );\r\n}\r\n\r\nfunction readBuffer(ptr: usize, length: usize): Uint8Array {\r\n  var ret = new Uint8Array(length);\r\n  for (let i: usize = 0; i < length; ++i) {\r\n    ret[i] = load<u8>(ptr + i);\r\n  }\r\n  return ret;\r\n}\r\n\r\nexport function readString(ptr: usize): string | null {\r\n  if (!ptr) return null;\r\n  var arr = new Array<i32>();\r\n  // the following is based on Emscripten's UTF8ArrayToString\r\n  var cp: u32;\r\n  var u1: u32, u2: u32, u3: u32, u4: u32, u5: u32;\r\n  while (cp = load<u8>(ptr++)) {\r\n    if (!(cp & 0x80)) {\r\n      arr.push(cp);\r\n      continue;\r\n    }\r\n    u1 = load<u8>(ptr++) & 63;\r\n    if ((cp & 0xE0) == 0xC0) {\r\n      arr.push(((cp & 31) << 6) | u1);\r\n      continue;\r\n    }\r\n    u2 = load<u8>(ptr++) & 63;\r\n    if ((cp & 0xF0) == 0xE0) {\r\n      cp = ((cp & 15) << 12) | (u1 << 6) | u2;\r\n    } else {\r\n      u3 = load<u8>(ptr++) & 63;\r\n      if ((cp & 0xF8) == 0xF0) {\r\n        cp = ((cp & 7) << 18) | (u1 << 12) | (u2 << 6) | u3;\r\n      } else {\r\n        u4 = load<u8>(ptr++) & 63;\r\n        if ((cp & 0xFC) == 0xF8) {\r\n          cp = ((cp & 3) << 24) | (u1 << 18) | (u2 << 12) | (u3 << 6) | u4;\r\n        } else {\r\n          u5 = load<u8>(ptr++) & 63;\r\n          cp = ((cp & 1) << 30) | (u1 << 24) | (u2 << 18) | (u3 << 12) | (u4 << 6) | u5;\r\n        }\r\n      }\r\n    }\r\n    arr.push(cp);\r\n    // if (cp < 0x10000) {\r\n    //   arr.push(cp);\r\n    // } else {\r\n    //   var ch = cp - 0x10000;\r\n    //   arr.push(0xD800 | (ch >> 10));\r\n    //   arr.push(0xDC00 | (ch & 0x3FF));\r\n    // }\r\n  }\r\n  // return String.fromCharCodes(arr);\r\n  return String.fromCodePoints(arr);\r\n}\r\n\r\n/** Result structure of {@link Module#toBinary}. */\r\nexport class BinaryModule {\r\n  /** WebAssembly binary. */\r\n  output: Uint8Array;\r\n  /** Source map, if generated. */\r\n  sourceMap: string | null;\r\n}\r\n\r\n/** Tests if an expression needs an explicit 'unreachable' when it is the terminating statement. */\r\nexport function needsExplicitUnreachable(expr: ExpressionRef): bool {\r\n  // not applicable if pushing a value to the stack\r\n  switch (_BinaryenExpressionGetType(expr)) {\r\n    case NativeType.I32:\r\n    case NativeType.I64:\r\n    case NativeType.F32:\r\n    case NativeType.F64: return false;\r\n  }\r\n  switch (_BinaryenExpressionGetId(expr)) {\r\n    case ExpressionId.Unreachable:\r\n    case ExpressionId.Return: return false;\r\n    case ExpressionId.Break: return _BinaryenBreakGetCondition(expr) != 0;\r\n    case ExpressionId.Block: {\r\n      if (!_BinaryenBlockGetName(expr)) { // can't break out of it\r\n        let numChildren = _BinaryenBlockGetNumChildren(expr); // last child needs unreachable\r\n        return numChildren > 0 && needsExplicitUnreachable(_BinaryenBlockGetChild(expr, numChildren - 1));\r\n      }\r\n    }\r\n  }\r\n  return true;\r\n}\r\n","var g;\r\n\r\n// This works in non-strict mode\r\ng = (function() {\r\n\treturn this;\r\n})();\r\n\r\ntry {\r\n\t// This works if eval is allowed (see CSP)\r\n\tg = g || Function(\"return this\")() || (1, eval)(\"this\");\r\n} catch (e) {\r\n\t// This works if the window reference is available\r\n\tif (typeof window === \"object\") g = window;\r\n}\r\n\r\n// g can still be undefined, but nothing to do about it...\r\n// We return undefined, instead of nothing here, so it's\r\n// easier to handle this case. if(!global) { ...}\r\n\r\nmodule.exports = g;\r\n","/**\r\n * Mappings from AssemblyScript types to WebAssembly types.\r\n * @module types\r\n *//***/\r\n\r\nimport {\r\n  Class,\r\n  FunctionTarget,\r\n  Program,\r\n  DecoratorFlags\r\n} from \"./program\";\r\n\r\nimport {\r\n  NativeType,\r\n  ExpressionRef,\r\n  Module\r\n} from \"./module\";\r\n\r\n/** Indicates the kind of a type. */\r\nexport const enum TypeKind {\r\n\r\n  // signed integers\r\n\r\n  /** An 8-bit signed integer. */\r\n  I8,\r\n  /** A 16-bit signed integer. */\r\n  I16,\r\n  /** A 32-bit signed integer. */\r\n  I32,\r\n  /** A 64-bit signed integer. */\r\n  I64,\r\n  /** A 32-bit/64-bit signed integer, depending on the target. */\r\n  ISIZE,\r\n\r\n  // unsigned integers\r\n\r\n  /** An 8-bit unsigned integer. */\r\n  U8,\r\n  /** A 16-bit unsigned integer. */\r\n  U16,\r\n  /** A 32-bit unsigned integer. Also the base of function types. */\r\n  U32,\r\n  /** A 64-bit unsigned integer. */\r\n  U64,\r\n  /** A 32-bit/64-bit unsigned integer, depending on the target. Also the base of class types. */\r\n  USIZE,\r\n  /** A 1-bit unsigned integer. */\r\n  BOOL, // sic\r\n\r\n  // floats\r\n\r\n  /** A 32-bit float. */\r\n  F32,\r\n  /** A 64-bit double. */\r\n  F64,\r\n\r\n  // other\r\n\r\n  /** No return type. */\r\n  VOID\r\n}\r\n\r\n/** Indicates capabilities of a type. */\r\nexport const enum TypeFlags {\r\n  NONE = 0,\r\n  /** Is a signed type that can represent negative values. */\r\n  SIGNED = 1 << 0,\r\n  /** Is an unsigned type that cannot represent negative values. */\r\n  UNSIGNED = 1 << 1,\r\n  /** Is an integer type. */\r\n  INTEGER = 1 << 2,\r\n  /** Is a floating point type. */\r\n  FLOAT = 1 << 3,\r\n  /** Is a pointer type. */\r\n  POINTER = 1 << 4,\r\n  /** Is smaller than 32-bits. */\r\n  SHORT = 1 << 5,\r\n  /** Is larger than 32-bits. */\r\n  LONG = 1 << 6,\r\n  /** Is a value type. */\r\n  VALUE = 1 << 7,\r\n  /** Is a reference type. */\r\n  REFERENCE = 1 << 8,\r\n  /** Is a nullable type. */\r\n  NULLABLE = 1 << 9\r\n}\r\n\r\n/** Represents a resolved type. */\r\nexport class Type {\r\n\r\n  /** Type kind. */\r\n  kind: TypeKind;\r\n  /** Type flags. */\r\n  flags: TypeFlags;\r\n  /** Size in bits. */\r\n  size: u32;\r\n  /** Size in bytes. */\r\n  byteSize: i32;\r\n  /** Underlying class reference, if a class type. */\r\n  classReference: Class | null;\r\n  /** Underlying signature reference, if a function type. */\r\n  signatureReference: Signature | null;\r\n  /** Respective non-nullable type, if nullable. */\r\n  nonNullableType: Type;\r\n  /** Cached nullable type, if non-nullable. */\r\n  private cachedNullableType: Type | null = null;\r\n\r\n  /** Constructs a new resolved type. */\r\n  constructor(kind: TypeKind, flags: TypeFlags, size: u32) {\r\n    this.kind = kind;\r\n    this.flags = flags;\r\n    this.size = size;\r\n    this.byteSize = <i32>ceil<f64>(<f64>size / 8);\r\n    this.classReference = null;\r\n    this.signatureReference = null;\r\n    this.nonNullableType = this;\r\n  }\r\n\r\n  /** Returns the closest int type representing this type. */\r\n  get intType(): Type {\r\n    switch (this.kind) {\r\n      case TypeKind.I8: return Type.i8;\r\n      case TypeKind.I16: return Type.i16;\r\n      case TypeKind.F32:\r\n      case TypeKind.I32: return Type.i32;\r\n      case TypeKind.F64:\r\n      case TypeKind.I64: return Type.i64;\r\n      case TypeKind.ISIZE: return this.size == 64 ? Type.isize64 : Type.isize32;\r\n      case TypeKind.U8: return Type.u8;\r\n      case TypeKind.U16: return Type.u16;\r\n      case TypeKind.U32: return Type.u32;\r\n      case TypeKind.U64: return Type.u64;\r\n      case TypeKind.USIZE: return this.size == 64 ? Type.usize64 : Type.usize32;\r\n      case TypeKind.BOOL:\r\n      default: return Type.i32;\r\n    }\r\n  }\r\n\r\n  /** Tests if this is a managed type that needs GC hooks. */\r\n  isManaged(program: Program): bool {\r\n    if (program.hasGC) {\r\n      let classReference = this.classReference;\r\n      return classReference !== null && !classReference.hasDecorator(DecoratorFlags.UNMANAGED);\r\n    }\r\n    return false;\r\n  }\r\n\r\n  /** Computes the sign-extending shift in the target type. */\r\n  computeSmallIntegerShift(targetType: Type): u32 {\r\n    return targetType.size - this.size;\r\n  }\r\n\r\n  /** Computes the truncating mask in the target type. */\r\n  computeSmallIntegerMask(targetType: Type): u32 {\r\n    var size = this.is(TypeFlags.UNSIGNED) ? this.size : this.size - 1;\r\n    return ~0 >>> (targetType.size - size);\r\n  }\r\n\r\n  /** Tests if this type has (all of) the specified flags. */\r\n  is(flags: TypeFlags): bool { return (this.flags & flags) == flags; }\r\n  /** Tests if this type has any of the specified flags. */\r\n  isAny(flags: TypeFlags): bool { return (this.flags & flags) != 0; }\r\n\r\n  /** Composes a class type from this type and a class. */\r\n  asClass(classType: Class): Type {\r\n    assert(this.kind == TypeKind.USIZE && !this.classReference);\r\n    var ret = new Type(this.kind, this.flags & ~TypeFlags.VALUE | TypeFlags.REFERENCE, this.size);\r\n    ret.classReference = classType;\r\n    return ret;\r\n  }\r\n\r\n  /** Composes a function type from this type and a function. */\r\n  asFunction(signature: Signature): Type {\r\n    assert(this.kind == TypeKind.U32 && !this.signatureReference);\r\n    var ret = new Type(this.kind, this.flags & ~TypeFlags.VALUE | TypeFlags.REFERENCE, this.size);\r\n    ret.signatureReference = signature;\r\n    return ret;\r\n  }\r\n\r\n  /** Composes the respective nullable type of this type. */\r\n  asNullable(): Type {\r\n    assert(this.is(TypeFlags.REFERENCE));\r\n    if (!this.cachedNullableType) {\r\n      assert(!this.is(TypeFlags.NULLABLE));\r\n      this.cachedNullableType = new Type(this.kind, this.flags | TypeFlags.NULLABLE, this.size);\r\n      this.cachedNullableType.nonNullableType = this;\r\n      this.cachedNullableType.classReference = this.classReference;       // either a class reference\r\n      this.cachedNullableType.signatureReference = this.signatureReference; // or a function reference\r\n    }\r\n    return this.cachedNullableType;\r\n  }\r\n\r\n  /** Tests if a value of this type is assignable to a target of the specified type. */\r\n  isAssignableTo(target: Type, signednessIsRelevant: bool = false): bool {\r\n    var currentClass: Class | null;\r\n    var targetClass: Class | null;\r\n    var currentFunction: Signature | null;\r\n    var targetFunction: Signature | null;\r\n    if (this.is(TypeFlags.REFERENCE)) {\r\n      if (target.is(TypeFlags.REFERENCE)) {\r\n        if (!this.is(TypeFlags.NULLABLE) || target.is(TypeFlags.NULLABLE)) {\r\n          if (currentClass = this.classReference) {\r\n            if (targetClass = target.classReference) {\r\n              return currentClass.isAssignableTo(targetClass);\r\n            }\r\n          } else if (currentFunction = this.signatureReference) {\r\n            if (targetFunction = target.signatureReference) {\r\n              return currentFunction.isAssignableTo(targetFunction);\r\n            }\r\n          }\r\n        }\r\n      }\r\n    } else if (!target.is(TypeFlags.REFERENCE)) {\r\n      if (this.is(TypeFlags.INTEGER)) {\r\n        if (target.is(TypeFlags.INTEGER)) {\r\n          if (!signednessIsRelevant || this.is(TypeFlags.SIGNED) == target.is(TypeFlags.SIGNED)) {\r\n            return this.size <= target.size;\r\n          }\r\n        } else if (target.kind == TypeKind.F32) {\r\n          return this.size <= 23; // mantissa bits\r\n        } else if (target.kind == TypeKind.F64) {\r\n          return this.size <= 52; // ^\r\n        }\r\n      } else if (this.is(TypeFlags.FLOAT)) {\r\n        if (target.is(TypeFlags.FLOAT)) {\r\n          return this.size <= target.size;\r\n        }\r\n      }\r\n    }\r\n    return false;\r\n  }\r\n\r\n  /** Determines the common compatible type of two types, if any. */\r\n  static commonCompatible(left: Type, right: Type, signednessIsImportant: bool): Type | null {\r\n    if (right.isAssignableTo(left, signednessIsImportant)) return left;\r\n    else if (left.isAssignableTo(right, signednessIsImportant)) return right;\r\n    return null;\r\n  }\r\n\r\n  /** Converts this type to its TypeScript representation. */\r\n  toString(kindOnly: bool = false): string {\r\n    if (!kindOnly && this.is(TypeFlags.REFERENCE)) {\r\n      let classReference = this.classReference;\r\n      if (classReference) {\r\n        return this.is(TypeFlags.NULLABLE)\r\n          ? classReference.toString() + \" | null\"\r\n          : classReference.toString();\r\n      }\r\n      let signatureReference = this.signatureReference;\r\n      if (signatureReference) {\r\n        return this.is(TypeFlags.NULLABLE)\r\n          ? \"(\" + signatureReference.toString(true) + \") | null\"\r\n          : signatureReference.toString(true);\r\n      }\r\n      assert(false);\r\n    }\r\n    switch (this.kind) {\r\n      case TypeKind.I8: return \"i8\";\r\n      case TypeKind.I16: return \"i16\";\r\n      case TypeKind.I32: return \"i32\";\r\n      case TypeKind.I64: return \"i64\";\r\n      case TypeKind.ISIZE: return \"isize\";\r\n      case TypeKind.U8: return \"u8\";\r\n      case TypeKind.U16: return \"u16\";\r\n      case TypeKind.U32: return \"u32\";\r\n      case TypeKind.U64: return \"u64\";\r\n      case TypeKind.USIZE: return \"usize\";\r\n      case TypeKind.BOOL: return \"bool\";\r\n      case TypeKind.F32: return \"f32\";\r\n      case TypeKind.F64: return \"f64\";\r\n      default: assert(false);\r\n      case TypeKind.VOID: return \"void\";\r\n    }\r\n  }\r\n\r\n  // Binaryen specific\r\n\r\n  /** Converts this type to its respective native type. */\r\n  toNativeType(): NativeType {\r\n    switch (this.kind) {\r\n      default: return NativeType.I32;\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return NativeType.I64;\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: return this.size == 64 ? NativeType.I64 : NativeType.I32;\r\n      case TypeKind.F32: return NativeType.F32;\r\n      case TypeKind.F64: return NativeType.F64;\r\n      case TypeKind.VOID:  return NativeType.None;\r\n    }\r\n  }\r\n\r\n  /** Converts this type to its native `0` value. */\r\n  toNativeZero(module: Module): ExpressionRef {\r\n    switch (this.kind) {\r\n      case TypeKind.VOID: assert(false);\r\n      default: return module.createI32(0);\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: if (this.size != 64) return module.createI32(0);\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return module.createI64(0);\r\n      case TypeKind.F32: return module.createF32(0);\r\n      case TypeKind.F64: return module.createF64(0);\r\n    }\r\n  }\r\n\r\n  /** Converts this type to its native `1` value. */\r\n  toNativeOne(module: Module): ExpressionRef {\r\n    switch (this.kind) {\r\n      case TypeKind.VOID: assert(false);\r\n      default: return module.createI32(1);\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: if (this.size != 64) return module.createI32(1);\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return module.createI64(1);\r\n      case TypeKind.F32: return module.createF32(1);\r\n      case TypeKind.F64: return module.createF64(1);\r\n    }\r\n  }\r\n\r\n  /** Converts this type to its native `-1` value. */\r\n  toNativeNegOne(module: Module): ExpressionRef {\r\n    switch (this.kind) {\r\n      case TypeKind.VOID: assert(false);\r\n      default: return module.createI32(-1);\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: if (this.size != 64) return module.createI32(-1);\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return module.createI64(-1, -1);\r\n      case TypeKind.F32: return module.createF32(-1);\r\n      case TypeKind.F64: return module.createF64(-1);\r\n    }\r\n  }\r\n\r\n  /** Converts this type to its signature string. */\r\n  toSignatureString(): string {\r\n    switch (this.kind) {\r\n      default: return \"i\";\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return \"I\";\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: return this.size == 64 ? \"I\" : \"i\";\r\n      case TypeKind.F32: return \"f\";\r\n      case TypeKind.F64: return \"F\";\r\n      case TypeKind.VOID: return \"v\";\r\n    }\r\n  }\r\n\r\n  // Types\r\n\r\n  /** An 8-bit signed integer. */\r\n  static readonly i8: Type  = new Type(TypeKind.I8,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,   8\r\n  );\r\n\r\n  /** A 16-bit signed integer. */\r\n  static readonly i16: Type = new Type(TypeKind.I16,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  16\r\n  );\r\n\r\n  /** A 32-bit signed integer. */\r\n  static readonly i32: Type = new Type(TypeKind.I32,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit signed integer. */\r\n  static readonly i64: Type = new Type(TypeKind.I64,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** A 32-bit signed size. WASM32 only. */\r\n  static readonly isize32: Type = new Type(TypeKind.ISIZE,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.POINTER  |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit signed size. WASM64 only. */\r\n  static readonly isize64: Type = new Type(TypeKind.ISIZE,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.POINTER  |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** An 8-bit unsigned integer. */\r\n  static readonly u8: Type = new Type(TypeKind.U8,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,   8\r\n  );\r\n\r\n  /** A 16-bit unsigned integer. */\r\n  static readonly u16: Type = new Type(TypeKind.U16,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  16\r\n  );\r\n\r\n  /** A 32-bit unsigned integer. */\r\n  static readonly u32: Type = new Type(TypeKind.U32,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit unsigned integer. */\r\n  static readonly u64: Type = new Type(TypeKind.U64,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** A 32-bit unsigned size. WASM32 only. */\r\n  static readonly usize32: Type = new Type(TypeKind.USIZE,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.POINTER  |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit unsigned size. WASM64 only. */\r\n  static readonly usize64: Type = new Type(TypeKind.USIZE,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.POINTER  |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** A 1-bit unsigned integer. */\r\n  static readonly bool: Type = new Type(TypeKind.BOOL,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,   1\r\n  );\r\n\r\n  /** A 32-bit float. */\r\n  static readonly f32: Type = new Type(TypeKind.F32,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.FLOAT    |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit float. */\r\n  static readonly f64: Type = new Type(TypeKind.F64,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.FLOAT    |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** No return type. */\r\n  static readonly void: Type = new Type(TypeKind.VOID, TypeFlags.NONE, 0);\r\n}\r\n\r\n/** Converts an array of types to an array of native types. */\r\nexport function typesToNativeTypes(types: Type[]): NativeType[] {\r\n  var numTypes = types.length;\r\n  var ret = new Array<NativeType>(numTypes);\r\n  for (let i = 0; i < numTypes; ++i) ret[i] = types[i].toNativeType();\r\n  return ret;\r\n}\r\n\r\n/** Converts an array of types to its combined string representation. */\r\nexport function typesToString(types: Type[]): string {\r\n  var numTypes = types.length;\r\n  if (!numTypes) return \"\";\r\n  var sb = new Array<string>(numTypes);\r\n  for (let i = 0; i < numTypes; ++i) sb[i] = types[i].toString();\r\n  return sb.join(\",\");\r\n}\r\n\r\n/** Represents a fully resolved function signature. */\r\nexport class Signature {\r\n\r\n  /** Parameter types, if any, excluding `this`. */\r\n  parameterTypes: Type[];\r\n  /** Parameter names, if known, excluding `this`. */\r\n  parameterNames: string[] | null;\r\n  /** Number of required parameters excluding `this`. Other parameters are considered optional. */\r\n  requiredParameters: i32;\r\n  /** Return type. */\r\n  returnType: Type;\r\n  /** This type, if an instance signature. */\r\n  thisType: Type | null;\r\n  /** Whether the last parameter is a rest parameter. */\r\n  hasRest: bool;\r\n  /** Cached {@link FunctionTarget}. */\r\n  cachedFunctionTarget: FunctionTarget | null = null;\r\n  /** Respective function type. */\r\n  type: Type;\r\n\r\n  /** Constructs a new signature. */\r\n  constructor(\r\n    parameterTypes: Type[] | null = null,\r\n    returnType: Type | null = null,\r\n    thisType: Type | null = null\r\n  ) {\r\n    this.parameterTypes = parameterTypes ? parameterTypes : [];\r\n    this.parameterNames = null;\r\n    this.requiredParameters = 0;\r\n    this.returnType = returnType ? returnType : Type.void;\r\n    this.thisType = thisType;\r\n    this.hasRest = false;\r\n    this.type = Type.u32.asFunction(this);\r\n  }\r\n\r\n  /** Gets the known or, alternatively, generic parameter name at the specified index. */\r\n  getParameterName(index: i32): string {\r\n    var parameterNames = this.parameterNames;\r\n    return parameterNames && parameterNames.length > index\r\n      ? parameterNames[index]\r\n      : getDefaultParameterName(index);\r\n  }\r\n\r\n  /** Tests if a value of this function type is assignable to a target of the specified function type. */\r\n  isAssignableTo(target: Signature): bool {\r\n    // TODO: maybe cache results?\r\n\r\n    // check `this` type\r\n    var thisThisType = this.thisType;\r\n    var targetThisType = target.thisType;\r\n    if (thisThisType) {\r\n      if (!(targetThisType && thisThisType.isAssignableTo(targetThisType))) return false;\r\n    } else if (targetThisType) {\r\n      return false;\r\n    }\r\n\r\n    // check rest parameter\r\n    if (this.hasRest != target.hasRest) return false; // TODO\r\n\r\n    // check parameter types\r\n    var thisParameterTypes = this.parameterTypes;\r\n    var targetParameterTypes = target.parameterTypes;\r\n    var numParameters = thisParameterTypes.length;\r\n    if (numParameters != targetParameterTypes.length) return false;\r\n    for (let i = 0; i < numParameters; ++i) {\r\n      let thisParameterType = thisParameterTypes[i];\r\n      let targetParameterType = targetParameterTypes[i];\r\n      if (!thisParameterType.isAssignableTo(targetParameterType)) return false;\r\n    }\r\n\r\n    // check return type\r\n    var thisReturnType = this.returnType;\r\n    var targetReturnType = target.returnType;\r\n    return thisReturnType == targetReturnType || thisReturnType.isAssignableTo(targetReturnType);\r\n  }\r\n\r\n  /** Converts a signature to a function type string. */\r\n  static makeSignatureString(parameterTypes: Type[] | null, returnType: Type, thisType: Type | null = null): string {\r\n    var sb = [];\r\n    if (thisType) sb.push(thisType.toSignatureString());\r\n    if (parameterTypes) {\r\n      for (let i = 0, k = parameterTypes.length; i < k; ++i) sb.push(parameterTypes[i].toSignatureString());\r\n    }\r\n    sb.push(returnType.toSignatureString());\r\n    return sb.join(\"\");\r\n  }\r\n\r\n  /** Converts this signature to a function type string. */\r\n  toSignatureString(): string {\r\n    return Signature.makeSignatureString(this.parameterTypes, this.returnType, this.thisType);\r\n  }\r\n\r\n  /** Converts this signature to a string. */\r\n  toString(includeThis: bool = false): string {\r\n    var sb = new Array<string>();\r\n    sb.push(\"(\");\r\n    var index = 0;\r\n    var thisType = this.thisType;\r\n    if (thisType) {\r\n      if (includeThis) {\r\n        sb.push(\"this: \");\r\n        sb.push(thisType.toString());\r\n        index = 1;\r\n      }\r\n    }\r\n    var parameters = this.parameterTypes;\r\n    var numParameters = parameters.length;\r\n    if (numParameters) {\r\n      let names = this.parameterNames;\r\n      let numNames = names ? names.length : 0;\r\n      let optionalStart = this.requiredParameters;\r\n      let restIndex = this.hasRest ? numParameters - 1 : -1;\r\n      for (let i = 0; i < numParameters; ++i, ++index) {\r\n        if (index) sb.push(\", \");\r\n        if (i == restIndex) sb.push(\"...\");\r\n        if (i < numNames) sb.push((<string[]>names)[i]);\r\n        else sb.push(getDefaultParameterName(i));\r\n        if (i >= optionalStart && i != restIndex) sb.push(\"?: \");\r\n        else sb.push(\": \");\r\n        sb.push(parameters[i].toString());\r\n      }\r\n    }\r\n    sb.push(\") => \");\r\n    sb.push(this.returnType.toString());\r\n    return sb.join(\"\");\r\n  }\r\n}\r\n\r\n// helpers\r\n\r\n// Cached default parameter names used where names are unknown.\r\nvar cachedDefaultParameterNames: string[] | null = null;\r\n\r\n/** Gets the cached default parameter name for the specified index. */\r\nexport function getDefaultParameterName(index: i32): string {\r\n  if (!cachedDefaultParameterNames) cachedDefaultParameterNames = [];\r\n  for (let i = cachedDefaultParameterNames.length; i <= index; ++i) {\r\n    cachedDefaultParameterNames.push(\"arg$\" + i.toString(10));\r\n  }\r\n  return cachedDefaultParameterNames[index - 1];\r\n}\r\n","/**\r\n * A TypeScript tokenizer modified for AssemblyScript.\r\n *\r\n * Skips over trivia and provides a general mark/reset mechanism for the parser to utilize on\r\n * ambiguous tokens.\r\n *\r\n * @module tokenizer\r\n *//***/\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  DiagnosticMessage,\r\n  DiagnosticEmitter\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Source,\r\n  CommentKind\r\n} from \"./ast\";\r\n\r\nimport {\r\n  CharCode,\r\n  isLineBreak,\r\n  isWhiteSpace,\r\n  isIdentifierStart,\r\n  isIdentifierPart,\r\n  isDecimalDigit,\r\n  isOctalDigit,\r\n  isKeywordCharacter\r\n} from \"./util\";\r\n\r\n/** Named token types. */\r\nexport enum Token {\r\n\r\n  // keywords\r\n  // discarded: ANY, BOOLEAN, NEVER, NUMBER, STRING, SYMBOL, UNDEFINED, LESSTHAN_SLASH\r\n\r\n  ABSTRACT,\r\n  AS,\r\n  ASYNC,\r\n  AWAIT,        // ES2017\r\n  BREAK,        // ES2017\r\n  CASE,         // ES2017\r\n  CATCH,        // ES2017\r\n  CLASS,        // ES2017\r\n  CONST,        // ES2017\r\n  CONTINUE,     // ES2017\r\n  CONSTRUCTOR,\r\n  DEBUGGER,     // ES2017\r\n  DECLARE,\r\n  DEFAULT,      // ES2017\r\n  DELETE,       // ES2017\r\n  DO,           // ES2017\r\n  ELSE,         // ES2017\r\n  ENUM,         // ES2017 future\r\n  EXPORT,       // ES2017\r\n  EXTENDS,      // ES2017\r\n  FALSE,        // ES\r\n  FINALLY,      // ES2017\r\n  FOR,          // ES2017\r\n  FROM,         // AS possible identifier\r\n  FUNCTION,     // ES2017\r\n  GET,\r\n  IF,           // ES2017\r\n  IMPLEMENTS,   // ES2017 non-lexical\r\n  IMPORT,       // ES2017\r\n  IN,           // ES2017\r\n  INSTANCEOF,   // ES2017\r\n  INTERFACE,    // ES2017 non-lexical\r\n  IS,\r\n  KEYOF,\r\n  LET,          // ES2017 non-lexical\r\n  MODULE,       // AS possible identifier\r\n  NAMESPACE,    // AS possible identifier\r\n  NEW,          // ES2017\r\n  NULL,         // ES\r\n  OF,\r\n  PACKAGE,      // ES2017 non-lexical\r\n  PRIVATE,      // ES2017 non-lexical\r\n  PROTECTED,    // ES2017 non-lexical\r\n  PUBLIC,       // ES2017 non-lexical\r\n  READONLY,\r\n  RETURN,       // ES2017\r\n  SET,\r\n  STATIC,       // ES2017 non-lexical\r\n  SUPER,        // ES2017\r\n  SWITCH,       // ES2017\r\n  THIS,         // ES2017\r\n  THROW,        // ES2017\r\n  TRUE,         // ES\r\n  TRY,          // ES2017\r\n  TYPE,         // AS possible identifier\r\n  TYPEOF,       // ES2017\r\n  VAR,          // ES2017\r\n  VOID,         // ES2017\r\n  WHILE,        // ES2017\r\n  WITH,         // ES2017\r\n  YIELD,        // ES2017\r\n\r\n  // punctuation\r\n\r\n  OPENBRACE,\r\n  CLOSEBRACE,\r\n  OPENPAREN,\r\n  CLOSEPAREN,\r\n  OPENBRACKET,\r\n  CLOSEBRACKET,\r\n  DOT,\r\n  DOT_DOT_DOT,\r\n  SEMICOLON,\r\n  COMMA,\r\n  LESSTHAN,\r\n  GREATERTHAN,\r\n  LESSTHAN_EQUALS,\r\n  GREATERTHAN_EQUALS,\r\n  EQUALS_EQUALS,\r\n  EXCLAMATION_EQUALS,\r\n  EQUALS_EQUALS_EQUALS,\r\n  EXCLAMATION_EQUALS_EQUALS,\r\n  EQUALS_GREATERTHAN,\r\n  PLUS,\r\n  MINUS,\r\n  ASTERISK_ASTERISK,\r\n  ASTERISK,\r\n  SLASH,\r\n  PERCENT,\r\n  PLUS_PLUS,\r\n  MINUS_MINUS,\r\n  LESSTHAN_LESSTHAN,\r\n  GREATERTHAN_GREATERTHAN,\r\n  GREATERTHAN_GREATERTHAN_GREATERTHAN,\r\n  AMPERSAND,\r\n  BAR,\r\n  CARET,\r\n  EXCLAMATION,\r\n  TILDE,\r\n  AMPERSAND_AMPERSAND,\r\n  BAR_BAR,\r\n  QUESTION,\r\n  COLON,\r\n  EQUALS,\r\n  PLUS_EQUALS,\r\n  MINUS_EQUALS,\r\n  ASTERISK_EQUALS,\r\n  ASTERISK_ASTERISK_EQUALS,\r\n  SLASH_EQUALS,\r\n  PERCENT_EQUALS,\r\n  LESSTHAN_LESSTHAN_EQUALS,\r\n  GREATERTHAN_GREATERTHAN_EQUALS,\r\n  GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS,\r\n  AMPERSAND_EQUALS,\r\n  BAR_EQUALS,\r\n  CARET_EQUALS,\r\n  AT,\r\n\r\n  // literals\r\n\r\n  IDENTIFIER,\r\n  STRINGLITERAL,\r\n  INTEGERLITERAL,\r\n  FLOATLITERAL,\r\n\r\n  // meta\r\n\r\n  INVALID,\r\n  ENDOFFILE\r\n}\r\n\r\nexport enum IdentifierHandling {\r\n  DEFAULT,\r\n  PREFER,\r\n  ALWAYS\r\n}\r\n\r\nexport function tokenFromKeyword(text: string): Token {\r\n  assert(text.length);\r\n  switch (text.charCodeAt(0)) {\r\n    case CharCode.a: {\r\n      switch (text) {\r\n        case \"abstract\": return Token.ABSTRACT;\r\n        case \"as\": return Token.AS;\r\n        case \"async\": return Token.ASYNC;\r\n        case \"await\": return Token.AWAIT;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.b: {\r\n      switch (text) {\r\n        case \"break\": return Token.BREAK;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.c: {\r\n      switch (text) {\r\n        case \"case\": return Token.CASE;\r\n        case \"catch\": return Token.CATCH;\r\n        case \"class\": return Token.CLASS;\r\n        case \"continue\": return Token.CONTINUE;\r\n        case \"const\": return Token.CONST;\r\n        case \"constructor\": return Token.CONSTRUCTOR;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.d: {\r\n      switch (text) {\r\n        case \"debugger\": return Token.DEBUGGER;\r\n        case \"declare\": return Token.DECLARE;\r\n        case \"default\": return Token.DEFAULT;\r\n        case \"delete\": return Token.DELETE;\r\n        case \"do\": return Token.DO;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.e: {\r\n      switch (text) {\r\n        case \"else\": return Token.ELSE;\r\n        case \"enum\": return Token.ENUM;\r\n        case \"export\": return Token.EXPORT;\r\n        case \"extends\": return Token.EXTENDS;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.f: {\r\n      switch (text) {\r\n        case \"false\": return Token.FALSE;\r\n        case \"finally\": return Token.FINALLY;\r\n        case \"for\": return Token.FOR;\r\n        case \"from\": return Token.FROM;\r\n        case \"function\": return Token.FUNCTION;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.g: {\r\n      switch (text) {\r\n        case \"get\": return Token.GET;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.i: {\r\n      switch (text) {\r\n        case \"if\": return Token.IF;\r\n        case \"implements\": return Token.IMPLEMENTS;\r\n        case \"import\": return Token.IMPORT;\r\n        case \"in\": return Token.IN;\r\n        case \"instanceof\": return Token.INSTANCEOF;\r\n        case \"interface\": return Token.INTERFACE;\r\n        case \"is\": return Token.IS;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.k: {\r\n      switch (text) {\r\n        case \"keyof\": return Token.KEYOF;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.l: {\r\n      switch (text) {\r\n        case \"let\": return Token.LET;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.m: {\r\n      switch (text) {\r\n        case \"module\": return Token.MODULE;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.n: {\r\n      switch (text) {\r\n        case \"namespace\": return Token.NAMESPACE;\r\n        case \"new\": return Token.NEW;\r\n        case \"null\": return Token.NULL;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.o: {\r\n      switch (text) {\r\n        case \"of\": return Token.OF;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.p: {\r\n      switch (text) {\r\n        case \"package\": return Token.PACKAGE;\r\n        case \"private\": return Token.PRIVATE;\r\n        case \"protected\": return Token.PROTECTED;\r\n        case \"public\": return Token.PUBLIC;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.r: {\r\n      switch (text) {\r\n        case \"readonly\": return Token.READONLY;\r\n        case \"return\": return Token.RETURN;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.s: {\r\n      switch (text) {\r\n        case \"set\": return Token.SET;\r\n        case \"static\": return Token.STATIC;\r\n        case \"super\": return Token.SUPER;\r\n        case \"switch\": return Token.SWITCH;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.t: {\r\n      switch (text) {\r\n        case \"this\": return Token.THIS;\r\n        case \"throw\": return Token.THROW;\r\n        case \"true\": return Token.TRUE;\r\n        case \"try\": return Token.TRY;\r\n        case \"type\": return Token.TYPE;\r\n        case \"typeof\": return Token.TYPEOF;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.v: {\r\n      switch (text) {\r\n        case \"var\": return Token.VAR;\r\n        case \"void\": return Token.VOID;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.w: {\r\n      switch (text) {\r\n        case \"while\": return Token.WHILE;\r\n        case \"with\": return Token.WITH;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.y: {\r\n      switch (text) {\r\n        case \"yield\": return Token.YIELD;\r\n      }\r\n      break;\r\n    }\r\n  }\r\n  return Token.INVALID;\r\n}\r\n\r\nexport function tokenIsAlsoIdentifier(token: Token): bool {\r\n  switch (token) {\r\n    case Token.ABSTRACT:\r\n    case Token.AS:\r\n    case Token.CONSTRUCTOR:\r\n    case Token.DECLARE:\r\n    case Token.DELETE:\r\n    case Token.FROM:\r\n    case Token.FOR:\r\n    case Token.GET:\r\n    case Token.IS:\r\n    case Token.KEYOF:\r\n    case Token.MODULE:\r\n    case Token.NAMESPACE:\r\n    case Token.READONLY:\r\n    case Token.SET:\r\n    case Token.TYPE: return true;\r\n    default: return false;\r\n  }\r\n}\r\n\r\nexport function operatorTokenToString(token: Token): string {\r\n  switch (token) {\r\n    case Token.DELETE: return \"delete\";\r\n    case Token.IN: return \"in\";\r\n    case Token.INSTANCEOF: return \"instanceof\";\r\n    case Token.NEW: return \"new\";\r\n    case Token.TYPEOF: return \"typeof\";\r\n    case Token.VOID: return \"void\";\r\n    case Token.YIELD: return \"yield\";\r\n    case Token.DOT_DOT_DOT: return \"...\";\r\n    case Token.COMMA: return \",\";\r\n    case Token.LESSTHAN: return \"<\";\r\n    case Token.GREATERTHAN: return \">\";\r\n    case Token.LESSTHAN_EQUALS: return \"<=\";\r\n    case Token.GREATERTHAN_EQUALS: return \">=\";\r\n    case Token.EQUALS_EQUALS: return \"==\";\r\n    case Token.EXCLAMATION_EQUALS: return \"!=\";\r\n    case Token.EQUALS_EQUALS_EQUALS: return \"===\";\r\n    case Token.EXCLAMATION_EQUALS_EQUALS: return \"!==\";\r\n    case Token.PLUS: return \"+\";\r\n    case Token.MINUS: return \"-\";\r\n    case Token.ASTERISK_ASTERISK: return \"**\";\r\n    case Token.ASTERISK: return \"*\";\r\n    case Token.SLASH: return \"/\";\r\n    case Token.PERCENT: return \"%\";\r\n    case Token.PLUS_PLUS: return \"++\";\r\n    case Token.MINUS_MINUS: return \"--\";\r\n    case Token.LESSTHAN_LESSTHAN: return \"<<\";\r\n    case Token.GREATERTHAN_GREATERTHAN: return \">>\";\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN: return \">>>\";\r\n    case Token.AMPERSAND: return \"&\";\r\n    case Token.BAR: return \"|\";\r\n    case Token.CARET: return \"^\";\r\n    case Token.EXCLAMATION: return \"!\";\r\n    case Token.TILDE: return \"~\";\r\n    case Token.AMPERSAND_AMPERSAND: return \"&&\";\r\n    case Token.BAR_BAR: return \"||\";\r\n    case Token.EQUALS: return \"=\";\r\n    case Token.PLUS_EQUALS: return \"+=\";\r\n    case Token.MINUS_EQUALS: return \"-=\";\r\n    case Token.ASTERISK_EQUALS: return \"*=\";\r\n    case Token.ASTERISK_ASTERISK_EQUALS: return \"**=\";\r\n    case Token.SLASH_EQUALS: return \"/=\";\r\n    case Token.PERCENT_EQUALS: return \"%=\";\r\n    case Token.LESSTHAN_LESSTHAN_EQUALS: return \"<<=\";\r\n    case Token.GREATERTHAN_GREATERTHAN_EQUALS: return \">>=\";\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS: return \">>>=\";\r\n    case Token.AMPERSAND_EQUALS: return \"&=\";\r\n    case Token.BAR_EQUALS: return \"|=\";\r\n    case Token.CARET_EQUALS: return \"^=\";\r\n    default: {\r\n      assert(false);\r\n      return \"\";\r\n    }\r\n  }\r\n}\r\n\r\nexport class Range {\r\n\r\n  source: Source;\r\n  start: i32;\r\n  end: i32;\r\n\r\n  // TODO: set these while tokenizing\r\n  // line: i32;\r\n  // column: i32;\r\n\r\n  constructor(source: Source, start: i32, end: i32) {\r\n    this.source = source;\r\n    this.start = start;\r\n    this.end = end;\r\n  }\r\n\r\n  static join(a: Range, b: Range): Range {\r\n    if (a.source != b.source) throw new Error(\"source mismatch\");\r\n    return new Range(a.source,\r\n      a.start < b.start ? a.start : b.start,\r\n      a.end > b.end ? a.end : b.end\r\n    );\r\n  }\r\n\r\n  get atStart(): Range {\r\n    return new Range(this.source, this.start, this.start);\r\n  }\r\n  get atEnd(): Range {\r\n    return new Range(this.source, this.end, this.end);\r\n  }\r\n\r\n  get line(): i32 {\r\n    var text = this.source.text;\r\n    var line = 1;\r\n    for (let pos = this.start; pos >= 0; --pos) {\r\n      if (text.charCodeAt(pos) == CharCode.LINEFEED) line++;\r\n    }\r\n    return line;\r\n  }\r\n\r\n  get column(): i32 {\r\n    var text = this.source.text;\r\n    var column = 0;\r\n    for (let pos = this.start - 1; pos >= 0; --pos) {\r\n      if (text.charCodeAt(pos) == CharCode.LINEFEED) break;\r\n      ++column;\r\n    }\r\n    return column;\r\n  }\r\n\r\n  toString(): string {\r\n    return this.source.text.substring(this.start, this.end);\r\n  }\r\n\r\n  debugInfoRef: usize = 0;\r\n}\r\n\r\ndeclare function parseFloat(str: string): f64;\r\n\r\n/** Handler for intercepting comments while tokenizing. */\r\nexport type CommentHandler = (kind: CommentKind, text: string, range: Range) => void;\r\n\r\n/** Tokenizes a source to individual {@link Token}s. */\r\nexport class Tokenizer extends DiagnosticEmitter {\r\n\r\n  source: Source;\r\n  end: i32 = 0;\r\n\r\n  pos: i32 = 0;\r\n  token: Token = -1;\r\n  tokenPos: i32 = 0;\r\n\r\n  nextToken: Token = -1;\r\n  nextTokenPos: i32 = 0;\r\n  nextTokenOnNewLine: bool = false;\r\n\r\n  onComment: CommentHandler | null = null;\r\n\r\n  /** Constructs a new tokenizer. */\r\n  constructor(source: Source, diagnostics: DiagnosticMessage[] | null = null) {\r\n    super(diagnostics);\r\n    this.source = source;\r\n    this.pos = 0;\r\n    this.end = source.text.length;\r\n    this.diagnostics = diagnostics ? diagnostics : new Array();\r\n\r\n    var text = source.text;\r\n\r\n    // skip bom\r\n    if (\r\n      this.pos < this.end &&\r\n      text.charCodeAt(this.pos) == CharCode.BYTEORDERMARK\r\n    ) {\r\n      ++this.pos;\r\n    }\r\n\r\n    // skip shebang\r\n    if (\r\n      this.pos + 1 < this.end &&\r\n      text.charCodeAt(this.pos) == CharCode.HASH &&\r\n      text.charCodeAt(this.pos + 1) == CharCode.EXCLAMATION\r\n    ) {\r\n      this.pos += 2;\r\n      while (\r\n        this.pos < this.end &&\r\n        text.charCodeAt(this.pos) != CharCode.LINEFEED\r\n      ) {\r\n        ++this.pos;\r\n      }\r\n      // 'next' now starts at lf or eof\r\n    }\r\n  }\r\n\r\n  next(identifierHandling: IdentifierHandling = IdentifierHandling.DEFAULT): Token {\r\n    this.nextToken = -1;\r\n    return this.token = this.unsafeNext(identifierHandling);\r\n  }\r\n\r\n  private unsafeNext(\r\n    identifierHandling: IdentifierHandling = IdentifierHandling.DEFAULT,\r\n    maxTokenLength: i32 = i32.MAX_VALUE\r\n  ): Token {\r\n    var text = this.source.text;\r\n    while (this.pos < this.end) {\r\n      this.tokenPos = this.pos;\r\n      let c = text.charCodeAt(this.pos);\r\n      switch (c) {\r\n        case CharCode.CARRIAGERETURN: {\r\n          if (!(\r\n            ++this.pos < this.end &&\r\n            text.charCodeAt(this.pos) == CharCode.LINEFEED\r\n          )) break;\r\n          // otherwise fall-through\r\n        }\r\n        case CharCode.LINEFEED:\r\n        case CharCode.TAB:\r\n        case CharCode.VERTICALTAB:\r\n        case CharCode.FORMFEED:\r\n        case CharCode.SPACE: {\r\n          ++this.pos;\r\n          break;\r\n        }\r\n        case CharCode.EXCLAMATION: {\r\n          ++this.pos;\r\n          if (\r\n            maxTokenLength > 1 && this.pos < this.end &&\r\n            text.charCodeAt(this.pos) == CharCode.EQUALS\r\n          ) {\r\n            ++this.pos;\r\n            if (\r\n              maxTokenLength > 2 && this.pos < this.end &&\r\n              text.charCodeAt(this.pos) == CharCode.EQUALS\r\n            ) {\r\n              ++this.pos;\r\n              return Token.EXCLAMATION_EQUALS_EQUALS;\r\n            }\r\n            return Token.EXCLAMATION_EQUALS;\r\n          }\r\n          return Token.EXCLAMATION;\r\n        }\r\n        case CharCode.DOUBLEQUOTE:\r\n        case CharCode.SINGLEQUOTE:\r\n        case CharCode.BACKTICK: { // TODO\r\n          return Token.STRINGLITERAL; // expects a call to readString\r\n        }\r\n        case CharCode.PERCENT: {\r\n          ++this.pos;\r\n          if (\r\n            maxTokenLength > 1 && this.pos < this.end &&\r\n            text.charCodeAt(this.pos) == CharCode.EQUALS\r\n          ) {\r\n            ++this.pos;\r\n            return Token.PERCENT_EQUALS;\r\n          }\r\n          return Token.PERCENT;\r\n        }\r\n        case CharCode.AMPERSAND: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.AMPERSAND) {\r\n              ++this.pos;\r\n              return Token.AMPERSAND_AMPERSAND;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.AMPERSAND_EQUALS;\r\n            }\r\n          }\r\n          return Token.AMPERSAND;\r\n        }\r\n        case CharCode.OPENPAREN: {\r\n          ++this.pos;\r\n          return Token.OPENPAREN;\r\n        }\r\n        case CharCode.CLOSEPAREN: {\r\n          ++this.pos;\r\n          return Token.CLOSEPAREN;\r\n        }\r\n        case CharCode.ASTERISK: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.ASTERISK_EQUALS;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.ASTERISK) {\r\n              ++this.pos;\r\n              if (\r\n                maxTokenLength > 2 && this.pos < this.end &&\r\n                text.charCodeAt(this.pos) == CharCode.EQUALS\r\n              ) {\r\n                ++this.pos;\r\n                return Token.ASTERISK_ASTERISK_EQUALS;\r\n              }\r\n              return Token.ASTERISK_ASTERISK;\r\n            }\r\n          }\r\n          return Token.ASTERISK;\r\n        }\r\n        case CharCode.PLUS: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.PLUS) {\r\n              ++this.pos;\r\n              return Token.PLUS_PLUS;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.PLUS_EQUALS;\r\n            }\r\n          }\r\n          return Token.PLUS;\r\n        }\r\n        case CharCode.COMMA: {\r\n          ++this.pos;\r\n          return Token.COMMA;\r\n        }\r\n        case CharCode.MINUS: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.MINUS) {\r\n              ++this.pos;\r\n              return Token.MINUS_MINUS;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.MINUS_EQUALS;\r\n            }\r\n          }\r\n          return Token.MINUS;\r\n        }\r\n        case CharCode.DOT: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (isDecimalDigit(text.charCodeAt(this.pos))) {\r\n              --this.pos;\r\n              return Token.FLOATLITERAL; // expects a call to readFloat\r\n            }\r\n            if (\r\n              maxTokenLength > 2 && this.pos + 1 < this.end &&\r\n              text.charCodeAt(this.pos) == CharCode.DOT &&\r\n              text.charCodeAt(this.pos + 1) == CharCode.DOT\r\n            ) {\r\n              this.pos += 2;\r\n              return Token.DOT_DOT_DOT;\r\n            }\r\n          }\r\n          return Token.DOT;\r\n        }\r\n        case CharCode.SLASH: {\r\n          let commentStartPos = this.pos;\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.SLASH) { // single-line\r\n              let commentKind = CommentKind.LINE;\r\n              if (\r\n                this.pos + 1 < this.end &&\r\n                text.charCodeAt(this.pos + 1) == CharCode.SLASH\r\n              ) {\r\n                ++this.pos;\r\n                commentKind = CommentKind.TRIPLE;\r\n              }\r\n              while (++this.pos < this.end) {\r\n                if (text.charCodeAt(this.pos) == CharCode.LINEFEED) {\r\n                  ++this.pos;\r\n                  break;\r\n                }\r\n              }\r\n              if (this.onComment) {\r\n                this.onComment(\r\n                  commentKind,\r\n                  text.substring(commentStartPos, this.pos),\r\n                  this.range(commentStartPos, this.pos)\r\n                );\r\n              }\r\n              break;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.ASTERISK) { // multi-line\r\n              let closed = false;\r\n              while (++this.pos < this.end) {\r\n                c = text.charCodeAt(this.pos);\r\n                if (\r\n                  c == CharCode.ASTERISK &&\r\n                  this.pos + 1 < this.end &&\r\n                  text.charCodeAt(this.pos + 1) == CharCode.SLASH\r\n                ) {\r\n                  this.pos += 2;\r\n                  closed = true;\r\n                  break;\r\n                }\r\n              }\r\n              if (!closed) {\r\n                this.error(\r\n                  DiagnosticCode._0_expected,\r\n                  this.range(this.pos), \"*/\"\r\n                );\r\n              } else if (this.onComment) {\r\n                this.onComment(\r\n                  CommentKind.BLOCK,\r\n                  text.substring(commentStartPos, this.pos),\r\n                  this.range(commentStartPos, this.pos)\r\n                );\r\n              }\r\n              break;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.SLASH_EQUALS;\r\n            }\r\n          }\r\n          return Token.SLASH;\r\n        }\r\n        case CharCode._0:\r\n        case CharCode._1:\r\n        case CharCode._2:\r\n        case CharCode._3:\r\n        case CharCode._4:\r\n        case CharCode._5:\r\n        case CharCode._6:\r\n        case CharCode._7:\r\n        case CharCode._8:\r\n        case CharCode._9: {\r\n          return this.testInteger()\r\n            ? Token.INTEGERLITERAL // expects a call to readInteger\r\n            : Token.FLOATLITERAL;  // expects a call to readFloat\r\n        }\r\n        case CharCode.COLON: {\r\n          ++this.pos;\r\n          return Token.COLON;\r\n        }\r\n        case CharCode.SEMICOLON: {\r\n          ++this.pos;\r\n          return Token.SEMICOLON;\r\n        }\r\n        case CharCode.LESSTHAN: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.LESSTHAN) {\r\n              ++this.pos;\r\n              if (\r\n                maxTokenLength > 2 &&\r\n                this.pos < this.end &&\r\n                text.charCodeAt(this.pos) == CharCode.EQUALS\r\n              ) {\r\n                ++this.pos;\r\n                return Token.LESSTHAN_LESSTHAN_EQUALS;\r\n              }\r\n              return Token.LESSTHAN_LESSTHAN;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.LESSTHAN_EQUALS;\r\n            }\r\n          }\r\n          return Token.LESSTHAN;\r\n        }\r\n        case CharCode.EQUALS: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              if (\r\n                maxTokenLength > 2 &&\r\n                this.pos < this.end &&\r\n                text.charCodeAt(this.pos) == CharCode.EQUALS\r\n              ) {\r\n                ++this.pos;\r\n                return Token.EQUALS_EQUALS_EQUALS;\r\n              }\r\n              return Token.EQUALS_EQUALS;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.GREATERTHAN) {\r\n              ++this.pos;\r\n              return Token.EQUALS_GREATERTHAN;\r\n            }\r\n          }\r\n          return Token.EQUALS;\r\n        }\r\n        case CharCode.GREATERTHAN: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.GREATERTHAN) {\r\n              ++this.pos;\r\n              if (maxTokenLength > 2 && this.pos < this.end) {\r\n                if (text.charCodeAt(this.pos) == CharCode.GREATERTHAN) {\r\n                  ++this.pos;\r\n                  if (\r\n                    maxTokenLength > 3 && this.pos < this.end &&\r\n                    text.charCodeAt(this.pos) == CharCode.EQUALS\r\n                  ) {\r\n                    ++this.pos;\r\n                    return Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS;\r\n                  }\r\n                  return Token.GREATERTHAN_GREATERTHAN_GREATERTHAN;\r\n                }\r\n                if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n                  ++this.pos;\r\n                  return Token.GREATERTHAN_GREATERTHAN_EQUALS;\r\n                }\r\n              }\r\n              return Token.GREATERTHAN_GREATERTHAN;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.GREATERTHAN_EQUALS;\r\n            }\r\n          }\r\n          return Token.GREATERTHAN;\r\n        }\r\n        case CharCode.QUESTION: {\r\n          ++this.pos;\r\n          return Token.QUESTION;\r\n        }\r\n        case CharCode.OPENBRACKET: {\r\n          ++this.pos;\r\n          return Token.OPENBRACKET;\r\n        }\r\n        case CharCode.CLOSEBRACKET: {\r\n          ++this.pos;\r\n          return Token.CLOSEBRACKET;\r\n        }\r\n        case CharCode.CARET: {\r\n          ++this.pos;\r\n          if (\r\n            maxTokenLength > 1 && this.pos < this.end &&\r\n            text.charCodeAt(this.pos) == CharCode.EQUALS\r\n          ) {\r\n            ++this.pos;\r\n            return Token.CARET_EQUALS;\r\n          }\r\n          return Token.CARET;\r\n        }\r\n        case CharCode.OPENBRACE: {\r\n          ++this.pos;\r\n          return Token.OPENBRACE;\r\n        }\r\n        case CharCode.BAR: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.BAR) {\r\n              ++this.pos;\r\n              return Token.BAR_BAR;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.BAR_EQUALS;\r\n            }\r\n          }\r\n          return Token.BAR;\r\n        }\r\n        case CharCode.CLOSEBRACE: {\r\n          ++this.pos;\r\n          return Token.CLOSEBRACE;\r\n        }\r\n        case CharCode.TILDE: {\r\n          ++this.pos;\r\n          return Token.TILDE;\r\n        }\r\n        case CharCode.AT: {\r\n          ++this.pos;\r\n          return Token.AT;\r\n        }\r\n        default: {\r\n          if (isIdentifierStart(c)) {\r\n            if (isKeywordCharacter(c)) {\r\n              let posBefore = this.pos;\r\n              while (\r\n                ++this.pos < this.end &&\r\n                isIdentifierPart(c = text.charCodeAt(this.pos))\r\n              ) {\r\n                if (!isKeywordCharacter(c)) {\r\n                  this.pos = posBefore;\r\n                  return Token.IDENTIFIER;\r\n                }\r\n              }\r\n              let keywordText = text.substring(posBefore, this.pos);\r\n              let keywordToken = tokenFromKeyword(keywordText);\r\n              if (\r\n                keywordToken != Token.INVALID &&\r\n                identifierHandling !== IdentifierHandling.ALWAYS &&\r\n                !(\r\n                  identifierHandling === IdentifierHandling.PREFER &&\r\n                  tokenIsAlsoIdentifier(keywordToken)\r\n                )\r\n              ) {\r\n                return keywordToken;\r\n              }\r\n              this.pos = posBefore;\r\n            }\r\n            return Token.IDENTIFIER; // expects a call to readIdentifier\r\n          } else if (isWhiteSpace(c)) {\r\n            ++this.pos;\r\n            break;\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Invalid_character,\r\n            this.range(this.pos, this.pos + 1)\r\n          );\r\n          ++this.pos;\r\n          return Token.INVALID;\r\n        }\r\n      }\r\n    }\r\n    return Token.ENDOFFILE;\r\n  }\r\n\r\n  peek(\r\n    checkOnNewLine: bool = false,\r\n    identifierHandling: IdentifierHandling = IdentifierHandling.DEFAULT,\r\n    maxCompoundLength: i32 = i32.MAX_VALUE\r\n  ): Token {\r\n    var text = this.source.text;\r\n    if (this.nextToken < 0) {\r\n      let posBefore = this.pos;\r\n      let tokenBefore = this.token;\r\n      let tokenPosBefore = this.tokenPos;\r\n      this.nextToken = this.unsafeNext(identifierHandling, maxCompoundLength);\r\n      this.nextTokenPos = this.tokenPos;\r\n      if (checkOnNewLine) {\r\n        this.nextTokenOnNewLine = false;\r\n        for (let pos = posBefore, end = this.nextTokenPos; pos < end; ++pos) {\r\n          if (isLineBreak(text.charCodeAt(pos))) {\r\n            this.nextTokenOnNewLine = true;\r\n            break;\r\n          }\r\n        }\r\n      }\r\n      this.pos = posBefore;\r\n      this.token = tokenBefore;\r\n      this.tokenPos = tokenPosBefore;\r\n    }\r\n    return this.nextToken;\r\n  }\r\n\r\n  skipIdentifier(): bool {\r\n    return this.skip(Token.IDENTIFIER, IdentifierHandling.PREFER);\r\n  }\r\n\r\n  skipIdentifierName(): bool {\r\n    return this.skip(Token.IDENTIFIER, IdentifierHandling.ALWAYS);\r\n  }\r\n\r\n  skip(token: Token, identifierHandling: IdentifierHandling = IdentifierHandling.DEFAULT): bool {\r\n    var posBefore = this.pos;\r\n    var tokenBefore = this.token;\r\n    var tokenPosBefore = this.tokenPos;\r\n    var maxCompoundLength = i32.MAX_VALUE;\r\n    switch (token) {\r\n      case Token.GREATERTHAN: { // where parsing type arguments\r\n        maxCompoundLength = 1;\r\n        break;\r\n      }\r\n    }\r\n    this.token = this.unsafeNext(identifierHandling, maxCompoundLength);\r\n    if (this.token == token) {\r\n      this.nextToken = -1;\r\n      return true;\r\n    } else {\r\n      this.pos = posBefore;\r\n      this.token = tokenBefore;\r\n      this.tokenPos = tokenPosBefore;\r\n      return false;\r\n    }\r\n  }\r\n\r\n  mark(): State {\r\n    var state: State;\r\n    if (reusableState) {\r\n      state = reusableState;\r\n      reusableState = null;\r\n    } else {\r\n      state = new State();\r\n    }\r\n    state.pos = this.pos;\r\n    state.token = this.token;\r\n    state.tokenPos = this.tokenPos;\r\n    return state;\r\n  }\r\n\r\n  discard(state: State): void {\r\n    reusableState = state;\r\n  }\r\n\r\n  reset(state: State): void {\r\n    this.pos = state.pos;\r\n    this.token = state.token;\r\n    this.tokenPos = state.tokenPos;\r\n    this.nextToken = -1;\r\n  }\r\n\r\n  range(start: i32 = -1, end: i32 = -1): Range {\r\n    if (start < 0) {\r\n      start = this.tokenPos;\r\n      end = this.pos;\r\n    } else if (end < 0) {\r\n      end = start;\r\n    }\r\n    return new Range(this.source, start, end);\r\n  }\r\n\r\n  readIdentifier(): string {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    while (\r\n      ++this.pos < this.end &&\r\n      isIdentifierPart(text.charCodeAt(this.pos))\r\n    );\r\n    return text.substring(start, this.pos);\r\n  }\r\n\r\n  readString(): string {\r\n    var text = this.source.text;\r\n    var quote = text.charCodeAt(this.pos++);\r\n    var start = this.pos;\r\n    var result = \"\";\r\n    while (true) {\r\n      if (this.pos >= this.end) {\r\n        result += text.substring(start, this.pos);\r\n        this.error(\r\n          DiagnosticCode.Unterminated_string_literal,\r\n          this.range(start - 1, this.end)\r\n        );\r\n        break;\r\n      }\r\n      let c = text.charCodeAt(this.pos);\r\n      if (c == quote) {\r\n        result += text.substring(start, this.pos++);\r\n        break;\r\n      }\r\n      if (c == CharCode.BACKSLASH) {\r\n        result += text.substring(start, this.pos);\r\n        result += this.readEscapeSequence();\r\n        start = this.pos;\r\n        continue;\r\n      }\r\n      if (isLineBreak(c)) {\r\n        result += text.substring(start, this.pos);\r\n        this.error(\r\n          DiagnosticCode.Unterminated_string_literal,\r\n          this.range(start - 1, this.pos)\r\n        );\r\n        break;\r\n      }\r\n      ++this.pos;\r\n    }\r\n    return result;\r\n  }\r\n\r\n  readEscapeSequence(): string {\r\n    if (++this.pos >= this.end) {\r\n      this.error(\r\n        DiagnosticCode.Unexpected_end_of_text,\r\n        this.range(this.end)\r\n      );\r\n      return \"\";\r\n    }\r\n\r\n    var text = this.source.text;\r\n    var c = text.charCodeAt(this.pos++);\r\n    switch (c) {\r\n      case CharCode._0: return \"\\0\";\r\n      case CharCode.b: return \"\\b\";\r\n      case CharCode.t: return \"\\t\";\r\n      case CharCode.n: return \"\\n\";\r\n      case CharCode.v: return \"\\v\";\r\n      case CharCode.f: return \"\\f\";\r\n      case CharCode.r: return \"\\r\";\r\n      case CharCode.SINGLEQUOTE: return \"'\";\r\n      case CharCode.DOUBLEQUOTE: return \"\\\"\";\r\n      case CharCode.u: {\r\n        if (\r\n          this.pos < this.end &&\r\n          text.charCodeAt(this.pos) == CharCode.OPENBRACE\r\n        ) {\r\n          ++this.pos;\r\n          return this.readExtendedUnicodeEscape(); // \\u{DDDDDDDD}\r\n        }\r\n        return this.readUnicodeEscape(); // \\uDDDD\r\n      }\r\n      case CharCode.CARRIAGERETURN: {\r\n        if (\r\n          this.pos < this.end &&\r\n          text.charCodeAt(this.pos) == CharCode.LINEFEED\r\n        ) {\r\n          ++this.pos;\r\n        }\r\n        // fall through\r\n      }\r\n      case CharCode.LINEFEED:\r\n      case CharCode.LINESEPARATOR:\r\n      case CharCode.PARAGRAPHSEPARATOR: return \"\";\r\n      default: return String.fromCharCode(c);\r\n    }\r\n  }\r\n\r\n  readRegexpPattern(): string {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var escaped = false;\r\n    while (true) {\r\n      if (this.pos >= this.end) {\r\n        this.error(\r\n          DiagnosticCode.Unterminated_regular_expression_literal,\r\n          this.range(start, this.end)\r\n        );\r\n        break;\r\n      }\r\n      if (text.charCodeAt(this.pos) == CharCode.BACKSLASH) {\r\n        ++this.pos;\r\n        escaped = true;\r\n        continue;\r\n      }\r\n      let c = text.charCodeAt(this.pos);\r\n      if (c == CharCode.SLASH && !escaped) break;\r\n      if (isLineBreak(c)) {\r\n        this.error(\r\n          DiagnosticCode.Unterminated_regular_expression_literal,\r\n          this.range(start, this.pos)\r\n        );\r\n        break;\r\n      }\r\n      ++this.pos;\r\n      escaped = false;\r\n    }\r\n    return text.substring(start, this.pos);\r\n  }\r\n\r\n  readRegexpFlags(): string {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var flags = 0;\r\n    while (this.pos < this.end) {\r\n      let c: i32 = text.charCodeAt(this.pos);\r\n      if (!isIdentifierPart(c)) break;\r\n      ++this.pos;\r\n\r\n      // make sure each supported flag is unique\r\n      switch (c) {\r\n        case CharCode.g: {\r\n          flags |= flags & 1 ? -1 : 1;\r\n          break;\r\n        }\r\n        case CharCode.i: {\r\n          flags |= flags & 2 ? -1 : 2;\r\n          break;\r\n        }\r\n        case CharCode.m: {\r\n          flags |= flags & 4 ? -1 : 4;\r\n          break;\r\n        }\r\n        default: {\r\n          flags = -1;\r\n          break;\r\n        }\r\n      }\r\n    }\r\n    if (flags == -1) {\r\n      this.error(\r\n        DiagnosticCode.Invalid_regular_expression_flags,\r\n        this.range(start, this.pos)\r\n      );\r\n    }\r\n    return text.substring(start, this.pos);\r\n  }\r\n\r\n  testInteger(): bool {\r\n    var text = this.source.text;\r\n    if (text.charCodeAt(this.pos) == CharCode._0 && this.pos + 1 < this.end) {\r\n      switch (text.charCodeAt(this.pos + 2)) {\r\n        case CharCode.X:\r\n        case CharCode.x:\r\n        case CharCode.B:\r\n        case CharCode.b:\r\n        case CharCode.O:\r\n        case CharCode.o: return true;\r\n      }\r\n    }\r\n    var pos = this.pos;\r\n    while (pos < this.end) {\r\n      let c = text.charCodeAt(pos);\r\n      if (c == CharCode.DOT || c == CharCode.E || c == CharCode.e) {\r\n        return false;\r\n      }\r\n      if ((c < CharCode._0 || c > CharCode._9) && c != CharCode._) break;\r\n      // does not validate separator placement (this is done in readXYInteger)\r\n      pos++;\r\n    }\r\n    return true;\r\n  }\r\n\r\n  readInteger(): I64 {\r\n    var text = this.source.text;\r\n    if (text.charCodeAt(this.pos) == CharCode._0 && this.pos + 2 < this.end) {\r\n      switch (text.charCodeAt(this.pos + 1)) {\r\n        case CharCode.X:\r\n        case CharCode.x: {\r\n          this.pos += 2;\r\n          return this.readHexInteger();\r\n        }\r\n        case CharCode.B:\r\n        case CharCode.b: {\r\n          this.pos += 2;\r\n          return this.readBinaryInteger();\r\n        }\r\n        case CharCode.O:\r\n        case CharCode.o: {\r\n          this.pos += 2;\r\n          return this.readOctalInteger();\r\n        }\r\n      }\r\n      if (isOctalDigit(text.charCodeAt(this.pos + 1))) {\r\n        let start = this.pos;\r\n        ++this.pos;\r\n        let value = this.readOctalInteger();\r\n        this.error(\r\n          DiagnosticCode.Octal_literals_are_not_allowed_in_strict_mode,\r\n          this.range(start, this.pos)\r\n        );\r\n        return value;\r\n      }\r\n    }\r\n    return this.readDecimalInteger();\r\n  }\r\n\r\n  readHexInteger(): I64 {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var value = i64_new(0, 0);\r\n    var i64_16 = i64_new(16, 0);\r\n    var sepEnd = start;\r\n    while (this.pos < this.end) {\r\n      let pos = this.pos;\r\n      let c = text.charCodeAt(pos);\r\n      if (c >= CharCode._0 && c <= CharCode._9) {\r\n        // value = value * 16 + c - CharCode._0;\r\n        value = i64_add(\r\n          i64_mul(value, i64_16),\r\n          i64_new(c - CharCode._0, 0)\r\n        );\r\n       } else if (c >= CharCode.A && c <= CharCode.F) {\r\n        // value = value * 16 + 10 + c - CharCode.A;\r\n        value = i64_add(\r\n          i64_mul(value, i64_16),\r\n          i64_new(10 + c - CharCode.A, 0)\r\n        );\r\n      } else if (c >= CharCode.a && c <= CharCode.f) {\r\n        // value = value * 16 + 10 + c - CharCode.a;\r\n        value = i64_add(\r\n          i64_mul(value, i64_16),\r\n          i64_new(10 + c - CharCode.a, 0)\r\n        );\r\n      } else if (c == CharCode._) {\r\n        if (sepEnd == pos) {\r\n          this.error(\r\n            sepEnd == start\r\n              ? DiagnosticCode.Numeric_separators_are_not_allowed_here\r\n              : DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,\r\n            this.range(pos)\r\n          );\r\n        }\r\n        sepEnd = pos + 1;\r\n      } else {\r\n        break;\r\n      }\r\n      this.pos = pos + 1;\r\n    }\r\n    if (this.pos == start) {\r\n      this.error(\r\n        DiagnosticCode.Hexadecimal_digit_expected,\r\n        this.range(start)\r\n      );\r\n    } else if (sepEnd == this.pos) {\r\n      this.error(\r\n        DiagnosticCode.Numeric_separators_are_not_allowed_here,\r\n        this.range(sepEnd - 1)\r\n      );\r\n    }\r\n    return value;\r\n  }\r\n\r\n  readDecimalInteger(): I64 {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var value = i64_new(0, 0);\r\n    var i64_10 = i64_new(10, 0);\r\n    var sepEnd = start;\r\n    while (this.pos < this.end) {\r\n      let pos = this.pos;\r\n      let c = text.charCodeAt(pos);\r\n      if (c >= CharCode._0 && c <= CharCode._9) {\r\n        // value = value * 10 + c - CharCode._0;\r\n        value = i64_add(\r\n          i64_mul(value, i64_10),\r\n          i64_new(c - CharCode._0, 0)\r\n        );\r\n      } else if (c == CharCode._) {\r\n        if (sepEnd == pos) {\r\n          this.error(\r\n            sepEnd == start\r\n              ? DiagnosticCode.Numeric_separators_are_not_allowed_here\r\n              : DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,\r\n            this.range(pos)\r\n          );\r\n        }\r\n        sepEnd = pos + 1;\r\n      } else {\r\n        break;\r\n      }\r\n      this.pos = pos + 1;\r\n    }\r\n    if (this.pos == start) {\r\n      this.error(\r\n        DiagnosticCode.Digit_expected,\r\n        this.range(start)\r\n      );\r\n    } else if (sepEnd == this.pos) {\r\n      this.error(\r\n        DiagnosticCode.Numeric_separators_are_not_allowed_here,\r\n        this.range(sepEnd - 1)\r\n      );\r\n    }\r\n    return value;\r\n  }\r\n\r\n  readOctalInteger(): I64 {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var value = i64_new(0, 0);\r\n    var i64_8 = i64_new(8, 0);\r\n    var sepEnd = start;\r\n    while (this.pos < this.end) {\r\n      let pos = this.pos;\r\n      let c = text.charCodeAt(pos);\r\n      if (c >= CharCode._0 && c <= CharCode._7) {\r\n        // value = value * 8 + c - CharCode._0;\r\n        value = i64_add(\r\n          i64_mul(value, i64_8),\r\n          i64_new(c - CharCode._0, 0)\r\n        );\r\n      } else if (c == CharCode._) {\r\n        if (sepEnd == pos) {\r\n          this.error(\r\n            sepEnd == start\r\n              ? DiagnosticCode.Numeric_separators_are_not_allowed_here\r\n              : DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,\r\n            this.range(pos)\r\n          );\r\n        }\r\n        sepEnd = pos + 1;\r\n      } else {\r\n        break;\r\n      }\r\n      ++this.pos;\r\n    }\r\n    if (this.pos == start) {\r\n      this.error(\r\n        DiagnosticCode.Octal_digit_expected,\r\n        this.range(start)\r\n      );\r\n    } else if (sepEnd == this.pos) {\r\n      this.error(\r\n        DiagnosticCode.Numeric_separators_are_not_allowed_here,\r\n        this.range(sepEnd - 1)\r\n      );\r\n    }\r\n    return value;\r\n  }\r\n\r\n  readBinaryInteger(): I64 {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var value = i64_new(0, 0);\r\n    var i64_2 = i64_new(2, 0);\r\n    var i64_1 = i64_new(1, 0);\r\n    var sepEnd = start;\r\n    while (this.pos < this.end) {\r\n      let pos = this.pos;\r\n      let c = text.charCodeAt(pos);\r\n      if (c == CharCode._0) {\r\n        // value = value * 2;\r\n        value = i64_mul(\r\n          value,\r\n          i64_2\r\n        );\r\n      } else if (c == CharCode._1) {\r\n        // value = value * 2 + 1;\r\n        value = i64_add(\r\n          i64_mul(value, i64_2),\r\n          i64_1\r\n        );\r\n      } else if (c == CharCode._) {\r\n        if (sepEnd == pos) {\r\n          this.error(\r\n            sepEnd == start\r\n              ? DiagnosticCode.Numeric_separators_are_not_allowed_here\r\n              : DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,\r\n            this.range(pos)\r\n          );\r\n        }\r\n        sepEnd = pos + 1;\r\n      } else {\r\n        break;\r\n      }\r\n      this.pos = pos + 1;\r\n    }\r\n    if (this.pos == start) {\r\n      this.error(\r\n        DiagnosticCode.Binary_digit_expected,\r\n        this.range(start)\r\n      );\r\n    } else if (sepEnd == this.pos) {\r\n      this.error(\r\n        DiagnosticCode.Numeric_separators_are_not_allowed_here,\r\n        this.range(sepEnd - 1)\r\n      );\r\n    }\r\n    return value;\r\n  }\r\n\r\n  readFloat(): f64 {\r\n    // var text = this.source.text;\r\n    // if (text.charCodeAt(this.pos) == CharCode._0 && this.pos + 2 < this.end) {\r\n    //   switch (text.charCodeAt(this.pos + 1)) {\r\n    //     case CharCode.X:\r\n    //     case CharCode.x: {\r\n    //       this.pos += 2;\r\n    //       return this.readHexFloat();\r\n    //     }\r\n    //   }\r\n    // }\r\n    return this.readDecimalFloat();\r\n  }\r\n\r\n  readDecimalFloat(): f64 {\r\n    // TODO: numeric separators (parseFloat can't handle these)\r\n    var start = this.pos;\r\n    var text = this.source.text;\r\n    while (this.pos < this.end && isDecimalDigit(text.charCodeAt(this.pos))) {\r\n      ++this.pos;\r\n    }\r\n    if (this.pos < this.end && text.charCodeAt(this.pos) == CharCode.DOT) {\r\n      ++this.pos;\r\n      while (this.pos < this.end && isDecimalDigit(text.charCodeAt(this.pos))) {\r\n        ++this.pos;\r\n      }\r\n    }\r\n    if (this.pos < this.end) {\r\n      let c = text.charCodeAt(this.pos);\r\n      if (c == CharCode.E || c == CharCode.e) {\r\n        if (\r\n          ++this.pos < this.end && (\r\n            text.charCodeAt(this.pos) == CharCode.MINUS ||\r\n            text.charCodeAt(this.pos) == CharCode.PLUS\r\n          ) &&\r\n          isDecimalDigit(text.charCodeAt(this.pos + 1))\r\n        ) {\r\n          ++this.pos;\r\n        }\r\n        while (this.pos < this.end && isDecimalDigit(text.charCodeAt(this.pos))) {\r\n          ++this.pos;\r\n        }\r\n      }\r\n    }\r\n    return parseFloat(text.substring(start, this.pos));\r\n  }\r\n\r\n  readHexFloat(): f64 {\r\n    throw new Error(\"not implemented\"); // TBD\r\n  }\r\n\r\n  readUnicodeEscape(): string {\r\n    var remain = 4;\r\n    var value = 0;\r\n    var text = this.source.text;\r\n    while (this.pos < this.end) {\r\n      let c = text.charCodeAt(this.pos++);\r\n      if (c >= CharCode._0 && c <= CharCode._9) {\r\n        value = value * 16 + c - CharCode._0;\r\n      } else if (c >= CharCode.A && c <= CharCode.F) {\r\n        value = value * 16 + 10 + c - CharCode.A;\r\n      } else if (c >= CharCode.a && c <= CharCode.f) {\r\n        value = value * 16 + 10 + c - CharCode.a;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Hexadecimal_digit_expected,\r\n          this.range(this.pos - 1, this.pos)\r\n        );\r\n        return \"\";\r\n      }\r\n      if (--remain == 0) break;\r\n    }\r\n    if (remain) {\r\n      this.error(\r\n        DiagnosticCode.Unexpected_end_of_text,\r\n        this.range(this.pos)\r\n      );\r\n      return \"\";\r\n    }\r\n    return String.fromCharCode(value);\r\n  }\r\n\r\n  private readExtendedUnicodeEscape(): string {\r\n    var start = this.pos;\r\n    var value = this.readHexInteger();\r\n    var value32 = i64_low(value);\r\n    var invalid = false;\r\n\r\n    assert(!i64_high(value));\r\n    if (value32 > 0x10FFFF) {\r\n      this.error(\r\n        DiagnosticCode.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive,\r\n        this.range(start, this.pos)\r\n      );\r\n      invalid = true;\r\n    }\r\n\r\n    var text = this.source.text;\r\n    if (this.pos >= this.end) {\r\n      this.error(\r\n        DiagnosticCode.Unexpected_end_of_text,\r\n        this.range(start, this.end)\r\n      );\r\n      invalid = true;\r\n    } else if (text.charCodeAt(this.pos) == CharCode.CLOSEBRACE) {\r\n      ++this.pos;\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Unterminated_Unicode_escape_sequence,\r\n        this.range(start, this.pos)\r\n      );\r\n      invalid = true;\r\n    }\r\n\r\n    if (invalid) return \"\";\r\n    return value32 < 65536\r\n      ? String.fromCharCode(value32)\r\n      : String.fromCharCode(\r\n        (((value32 - 65536) / 1024 | 0) + 0xD800) as i32,\r\n        ( (value32 - 65536) % 1024      + 0xDC00) as i32\r\n      );\r\n  }\r\n\r\n  finish(): void {\r\n  }\r\n}\r\n\r\n/** Tokenizer state as returned by {@link Tokenizer#mark} and consumed by {@link Tokenizer#reset}. */\r\nexport class State {\r\n  /** Current position. */\r\n  pos: i32;\r\n  /** Current token. */\r\n  token: Token;\r\n  /** Current token's position. */\r\n  tokenPos: i32;\r\n}\r\n\r\n// Reusable state object to reduce allocations\r\nvar reusableState: State | null = null;\r\n","/**\r\n * The AssemblyScript compiler.\r\n * @module compiler\r\n *//***/\r\n\r\nimport {\r\n  compileCall as compileBuiltinCall,\r\n  compileAllocate,\r\n  compileAbort,\r\n  compileIterateRoots,\r\n  ensureGCHook\r\n} from \"./builtins\";\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  DiagnosticEmitter\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Module,\r\n  MemorySegment,\r\n  ExpressionRef,\r\n  UnaryOp,\r\n  BinaryOp,\r\n  NativeType,\r\n  FunctionRef,\r\n  ExpressionId,\r\n  FunctionTypeRef,\r\n  GlobalRef,\r\n  getExpressionId,\r\n  getExpressionType,\r\n  getConstValueI32,\r\n  getConstValueI64Low,\r\n  getConstValueI64High,\r\n  getConstValueF32,\r\n  getConstValueF64,\r\n  getGetLocalIndex,\r\n  getBlockChildCount,\r\n  getBlockChild,\r\n  getBlockName,\r\n  needsExplicitUnreachable\r\n} from \"./module\";\r\n\r\nimport {\r\n  CommonFlags,\r\n  PATH_DELIMITER,\r\n  INNER_DELIMITER,\r\n  INSTANCE_DELIMITER,\r\n  STATIC_DELIMITER,\r\n  GETTER_PREFIX,\r\n  SETTER_PREFIX\r\n} from \"./common\";\r\n\r\nimport {\r\n  Program,\r\n  ClassPrototype,\r\n  Class,\r\n  Element,\r\n  ElementKind,\r\n  Enum,\r\n  Field,\r\n  FunctionPrototype,\r\n  Function,\r\n  FunctionTarget,\r\n  Global,\r\n  Local,\r\n  Namespace,\r\n  EnumValue,\r\n  Property,\r\n  VariableLikeElement,\r\n  FlowFlags,\r\n  ConstantValueKind,\r\n  Flow,\r\n  OperatorKind,\r\n  DecoratorFlags\r\n} from \"./program\";\r\n\r\nimport {\r\n  Resolver, ReportMode\r\n} from \"./resolver\";\r\n\r\nimport {\r\n  Token,\r\n  operatorTokenToString\r\n} from \"./tokenizer\";\r\n\r\nimport {\r\n  Node,\r\n  NodeKind,\r\n  TypeNode,\r\n  Source,\r\n  Range,\r\n  DecoratorKind,\r\n\r\n  Statement,\r\n  BlockStatement,\r\n  BreakStatement,\r\n  ClassDeclaration,\r\n  ContinueStatement,\r\n  DeclarationStatement,\r\n  DoStatement,\r\n  EmptyStatement,\r\n  EnumDeclaration,\r\n  ExportStatement,\r\n  ExpressionStatement,\r\n  FunctionDeclaration,\r\n  ForStatement,\r\n  IfStatement,\r\n  ImportStatement,\r\n  InstanceOfExpression,\r\n  InterfaceDeclaration,\r\n  NamespaceDeclaration,\r\n  ReturnStatement,\r\n  SwitchStatement,\r\n  ThrowStatement,\r\n  TryStatement,\r\n  VariableDeclaration,\r\n  VariableStatement,\r\n  VoidStatement,\r\n  WhileStatement,\r\n\r\n  Expression,\r\n  AssertionExpression,\r\n  BinaryExpression,\r\n  CallExpression,\r\n  CommaExpression,\r\n  ElementAccessExpression,\r\n  FloatLiteralExpression,\r\n  FunctionExpression,\r\n  IdentifierExpression,\r\n  IntegerLiteralExpression,\r\n  LiteralExpression,\r\n  LiteralKind,\r\n  NewExpression,\r\n  ObjectLiteralExpression,\r\n  ParenthesizedExpression,\r\n  PropertyAccessExpression,\r\n  TernaryExpression,\r\n  ArrayLiteralExpression,\r\n  StringLiteralExpression,\r\n  UnaryPostfixExpression,\r\n  UnaryPrefixExpression,\r\n  FieldDeclaration,\r\n\r\n  nodeIsConstantValue,\r\n  isLastStatement,\r\n  findDecorator\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Type,\r\n  TypeKind,\r\n  TypeFlags,\r\n  Signature,\r\n\r\n  typesToNativeTypes\r\n} from \"./types\";\r\n\r\nimport {\r\n  writeI8,\r\n  writeI16,\r\n  writeI32,\r\n  writeI64,\r\n  writeF32,\r\n  writeF64\r\n} from \"./util\";\r\n\r\n/** Compilation target. */\r\nexport enum Target {\r\n  /** WebAssembly with 32-bit pointers. */\r\n  WASM32,\r\n  /** WebAssembly with 64-bit pointers. Experimental and not supported by any runtime yet. */\r\n  WASM64\r\n}\r\n\r\n/** Compiler options. */\r\nexport class Options {\r\n\r\n  /** WebAssembly target. Defaults to {@link Target.WASM32}. */\r\n  target: Target = Target.WASM32;\r\n  /** If true, compiles everything instead of just reachable code. */\r\n  noTreeShaking: bool = false;\r\n  /** If true, replaces assertions with nops. */\r\n  noAssert: bool = false;\r\n  /** If true, imports the memory provided by the embedder. */\r\n  importMemory: bool = false;\r\n  /** If true, imports the function table provided by the embedder. */\r\n  importTable: bool = false;\r\n  /** If true, generates information necessary for source maps. */\r\n  sourceMap: bool = false;\r\n  /** Static memory start offset. */\r\n  memoryBase: i32 = 0;\r\n  /** Global aliases. */\r\n  globalAliases: Map<string,string> | null = null;\r\n  /** Additional features to activate. */\r\n  features: Feature = Feature.NONE;\r\n\r\n  /** Hinted optimize level. Not applied by the compiler itself. */\r\n  optimizeLevelHint: i32 = 0;\r\n  /** Hinted shrink level. Not applied by the compiler itself. */\r\n  shrinkLevelHint: i32 = 0;\r\n\r\n  /** Tests if the target is WASM64 or, otherwise, WASM32. */\r\n  get isWasm64(): bool {\r\n    return this.target == Target.WASM64;\r\n  }\r\n\r\n  /** Gets the unsigned size type matching the target. */\r\n  get usizeType(): Type {\r\n    return this.target == Target.WASM64 ? Type.usize64 : Type.usize32;\r\n  }\r\n\r\n  /** Gets the signed size type matching the target. */\r\n  get isizeType(): Type {\r\n    return this.target == Target.WASM64 ? Type.isize64 : Type.isize32;\r\n  }\r\n\r\n  /** Gets the native size type matching the target. */\r\n  get nativeSizeType(): NativeType {\r\n    return this.target == Target.WASM64 ? NativeType.I64 : NativeType.I32;\r\n  }\r\n\r\n  /** Tests if a specific feature is activated. */\r\n  hasFeature(feature: Feature): bool {\r\n    return (this.features & feature) != 0;\r\n  }\r\n}\r\n\r\n/** Indicates specific features to activate. */\r\nexport const enum Feature {\r\n  /** No additional features. */\r\n  NONE = 0,\r\n  /** Sign extension operations. */\r\n  SIGN_EXTENSION = 1 << 0, // see: https://github.com/WebAssembly/sign-extension-ops\r\n  /** Mutable global imports and exports. */\r\n  MUTABLE_GLOBAL = 1 << 1  // see: https://github.com/WebAssembly/mutable-global\r\n}\r\n\r\n/** Indicates the desired kind of a conversion. */\r\nexport const enum ConversionKind {\r\n  /** No conversion. */\r\n  NONE,\r\n  /** Implicit conversion. */\r\n  IMPLICIT,\r\n  /** Explicit conversion. */\r\n  EXPLICIT\r\n}\r\n\r\n/** Indicates the desired wrap mode of a conversion. */\r\nexport const enum WrapMode {\r\n  /** No wrapping. */\r\n  NONE,\r\n  /** Wrap small integer values. */\r\n  WRAP\r\n}\r\n\r\n/** Compiler interface. */\r\nexport class Compiler extends DiagnosticEmitter {\r\n\r\n  /** Program reference. */\r\n  program: Program;\r\n  /** Resolver reference. */\r\n  resolver: Resolver;\r\n  /** Provided options. */\r\n  options: Options;\r\n  /** Module instance being compiled. */\r\n  module: Module;\r\n  /** Current function in compilation. */\r\n  currentFunction: Function;\r\n  /** Current outer function in compilation, if compiling a function expression. */\r\n  currentOuterFunction: Function | null = null;\r\n  /** Current inline functions stack. */\r\n  currentInlineFunctions: Function[] = [];\r\n  /** Current enum in compilation. */\r\n  currentEnum: Enum | null = null;\r\n  /** Current type in compilation. */\r\n  currentType: Type = Type.void;\r\n  /** Start function being compiled. */\r\n  startFunctionInstance: Function;\r\n  /** Start function statements. */\r\n  startFunctionBody: ExpressionRef[];\r\n  /** Counting memory offset. */\r\n  memoryOffset: I64;\r\n  /** Memory segments being compiled. */\r\n  memorySegments: MemorySegment[] = [];\r\n  /** Map of already compiled static string segments. */\r\n  stringSegments: Map<string,MemorySegment> = new Map();\r\n  /** Function table being compiled. */\r\n  functionTable: FunctionRef[] = [];\r\n  /** Argument count helper global. */\r\n  argcVar: GlobalRef = 0;\r\n  /** Argument count helper setter. */\r\n  argcSet: FunctionRef = 0;\r\n  /** Indicates whether the iterateRoots function must be generated. */\r\n  needsIterateRoots: bool = false;\r\n\r\n  /** Compiles a {@link Program} to a {@link Module} using the specified options. */\r\n  static compile(program: Program, options: Options | null = null): Module {\r\n    return new Compiler(program, options).compile();\r\n  }\r\n\r\n  /** Constructs a new compiler for a {@link Program} using the specified options. */\r\n  constructor(program: Program, options: Options | null = null) {\r\n    super(program.diagnostics);\r\n    this.program = program;\r\n    this.resolver = program.resolver;\r\n    if (!options) options = new Options();\r\n    this.options = options;\r\n    this.memoryOffset = i64_new(\r\n      // leave space for `null`. also functions as a sentinel for erroneous stores at offset 0.\r\n      // note that Binaryen's asm.js output utilizes the first 8 bytes for reinterpretations (#1547)\r\n      max(options.memoryBase, 8)\r\n    );\r\n    this.module = Module.create();\r\n  }\r\n\r\n  /** Performs compilation of the underlying {@link Program} to a {@link Module}. */\r\n  compile(): Module {\r\n    var options = this.options;\r\n    var module = this.module;\r\n    var program = this.program;\r\n\r\n    // initialize lookup maps, built-ins, imports, exports, etc.\r\n    program.initialize(options);\r\n\r\n    // set up the start function\r\n    var startFunctionInstance = new Function(program.startFunction, \"start\", new Signature([], Type.void));\r\n    this.startFunctionInstance = startFunctionInstance;\r\n    var startFunctionBody = new Array<ExpressionRef>();\r\n    this.startFunctionBody = startFunctionBody;\r\n    this.currentFunction = startFunctionInstance;\r\n\r\n    // compile entry file(s) while traversing reachable elements\r\n    var sources = program.sources;\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      if (sources[i].isEntry) this.compileSource(sources[i]);\r\n    }\r\n\r\n    // compile the start function if not empty or called by main\r\n    if (startFunctionBody.length || program.mainFunction !== null) {\r\n      let signature = startFunctionInstance.signature;\r\n      let funcRef = module.addFunction(\r\n        startFunctionInstance.internalName,\r\n        this.ensureFunctionType(\r\n          signature.parameterTypes,\r\n          signature.returnType,\r\n          signature.thisType\r\n        ),\r\n        typesToNativeTypes(startFunctionInstance.additionalLocals),\r\n        module.createBlock(null, startFunctionBody)\r\n      );\r\n      startFunctionInstance.finalize(module, funcRef);\r\n      if (!program.mainFunction) module.setStart(funcRef);\r\n    }\r\n\r\n    // set up static memory segments and the heap base pointer\r\n    var memoryOffset = this.memoryOffset;\r\n    memoryOffset = i64_align(memoryOffset, options.usizeType.byteSize);\r\n    this.memoryOffset = memoryOffset;\r\n    if (options.isWasm64) {\r\n      module.addGlobal(\r\n        \"HEAP_BASE\",\r\n        NativeType.I64,\r\n        false,\r\n        module.createI64(i64_low(memoryOffset), i64_high(memoryOffset))\r\n      );\r\n    } else {\r\n      module.addGlobal(\r\n        \"HEAP_BASE\",\r\n        NativeType.I32,\r\n        false,\r\n        module.createI32(i64_low(memoryOffset))\r\n      );\r\n    }\r\n\r\n    // determine initial page size\r\n    var numPages = this.memorySegments.length\r\n      ? i64_low(i64_shr_u(i64_align(memoryOffset, 0x10000), i64_new(16, 0)))\r\n      : 0;\r\n    module.setMemory(\r\n      numPages,\r\n      this.options.isWasm64\r\n        ? Module.MAX_MEMORY_WASM64\r\n        : Module.MAX_MEMORY_WASM32,\r\n      this.memorySegments,\r\n      options.target,\r\n      \"memory\"\r\n    );\r\n\r\n    // import memory if requested (default memory is named '0' by Binaryen)\r\n    if (options.importMemory) module.addMemoryImport(\"0\", \"env\", \"memory\");\r\n\r\n    // set up function table\r\n    var functionTable = this.functionTable;\r\n    var functionTableSize = functionTable.length;\r\n    var functionTableExported = false;\r\n    if (functionTableSize) {\r\n      module.setFunctionTable(functionTable);\r\n      module.addTableExport(\"0\", \"table\");\r\n      functionTableExported = true;\r\n    }\r\n\r\n    // import table if requested (default table is named '0' by Binaryen)\r\n    if (options.importTable) {\r\n      module.addTableImport(\"0\", \"env\", \"table\");\r\n      if (!functionTableExported) module.addTableExport(\"0\", \"table\");\r\n    }\r\n\r\n    // set up module exports\r\n    for (let [name, moduleExport] of program.moduleLevelExports) {\r\n      this.makeModuleExport(name, moduleExport.element);\r\n    }\r\n\r\n    // set up gc\r\n    if (this.needsIterateRoots) compileIterateRoots(this);\r\n\r\n    return module;\r\n  }\r\n\r\n  /** Applies the respective module export(s) for the specified element. */\r\n  private makeModuleExport(name: string, element: Element, prefix: string = \"\"): void {\r\n\r\n    // traverse members\r\n    var members = element.members;\r\n    if (members) {\r\n      let subPrefix = prefix + name + (element.kind == ElementKind.CLASS\r\n        ? INSTANCE_DELIMITER\r\n        : STATIC_DELIMITER\r\n      );\r\n      if (element.kind == ElementKind.NAMESPACE) {\r\n        for (let member of members.values()) {\r\n          if (!member.is(CommonFlags.EXPORT)) continue;\r\n          this.makeModuleExport(member.simpleName, member, subPrefix);\r\n        }\r\n      } else {\r\n        for (let member of members.values()) {\r\n          if (member.is(CommonFlags.PRIVATE)) continue;\r\n          this.makeModuleExport(member.simpleName, member, subPrefix);\r\n        }\r\n      }\r\n    }\r\n\r\n    switch (element.kind) {\r\n\r\n      // export global\r\n      case ElementKind.GLOBAL: {\r\n        let isConst = element.is(CommonFlags.CONST) || element.is(CommonFlags.STATIC | CommonFlags.READONLY);\r\n        if (!isConst && !this.options.hasFeature(Feature.MUTABLE_GLOBAL)) {\r\n          let declaration = (<Global>element).declaration;\r\n          if (declaration) {\r\n            this.error(\r\n              DiagnosticCode.Cannot_export_a_mutable_global,\r\n              declaration.name.range\r\n            );\r\n          }\r\n        } else {\r\n          this.module.addGlobalExport(element.internalName, prefix + name);\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.ENUMVALUE: {\r\n        if (!assert(element.parent).is(CommonFlags.CONST) && !this.options.hasFeature(Feature.MUTABLE_GLOBAL)) {\r\n          let declaration = (<EnumValue>element).declaration;\r\n          if (declaration) {\r\n            this.error(\r\n              DiagnosticCode.Cannot_export_a_mutable_global,\r\n              declaration.name.range\r\n            );\r\n          }\r\n        } else {\r\n          this.module.addGlobalExport(element.internalName, prefix + name);\r\n        }\r\n        break;\r\n      }\r\n\r\n      // export function\r\n      case ElementKind.FUNCTION: {\r\n        let instance = <Function>element;\r\n        let signature = instance.signature;\r\n        if (signature.requiredParameters < signature.parameterTypes.length) {\r\n          // utilize trampoline to fill in omitted arguments\r\n          instance = this.ensureTrampoline(instance);\r\n          this.ensureArgcSet();\r\n        }\r\n        if (instance.is(CommonFlags.COMPILED)) this.module.addFunctionExport(instance.internalName, prefix + name);\r\n        break;\r\n      }\r\n\r\n      // export getter and setter\r\n      case ElementKind.PROPERTY: {\r\n        let getter = assert((<Property>element).getterPrototype);\r\n        this.makeModuleExport(GETTER_PREFIX + name, getter, prefix);\r\n        let setter = (<Property>element).setterPrototype;\r\n        if (setter) this.makeModuleExport(SETTER_PREFIX + name, setter, prefix);\r\n        break;\r\n      }\r\n\r\n      // export a getter and a setter\r\n      case ElementKind.FIELD: {\r\n        let module = this.module;\r\n        let type = (<Field>element).type;\r\n        let nativeType = type.toNativeType();\r\n        let offset = (<Field>element).memoryOffset;\r\n        let usizeType = this.options.usizeType;\r\n        let nativeSizeType = this.options.nativeSizeType;\r\n\r\n        // make a getter\r\n        let getterName = prefix + GETTER_PREFIX + name;\r\n        module.addFunction(\r\n          getterName,\r\n          this.ensureFunctionType(null, type, usizeType),\r\n          null,\r\n          module.createLoad(\r\n            type.byteSize,\r\n            type.is(TypeFlags.SIGNED),\r\n            module.createGetLocal(0, nativeSizeType),\r\n            nativeType,\r\n            offset\r\n          )\r\n        );\r\n        module.addFunctionExport(getterName, getterName);\r\n\r\n        // make a setter\r\n        if (!element.is(CommonFlags.READONLY)) {\r\n          let setterName = prefix + SETTER_PREFIX + name;\r\n          module.addFunction(\r\n            setterName,\r\n            this.ensureFunctionType([ type ], Type.void, usizeType),\r\n            null,\r\n            module.createStore(\r\n              type.byteSize,\r\n              module.createGetLocal(0, nativeSizeType),\r\n              module.createGetLocal(1, nativeType),\r\n              nativeType,\r\n              offset\r\n            )\r\n          );\r\n          module.addFunctionExport(setterName, setterName);\r\n        }\r\n        break;\r\n      }\r\n\r\n      // skip prototype and export instances\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        for (let instance of (<FunctionPrototype>element).instances.values()) {\r\n          let instanceName = name;\r\n          if (instance.is(CommonFlags.GENERIC)) {\r\n            let fullName = instance.internalName;\r\n            instanceName += fullName.substring(fullName.lastIndexOf(\"<\"));\r\n          }\r\n          this.makeModuleExport(instanceName, instance, prefix);\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.CLASS_PROTOTYPE: {\r\n        for (let instance of (<ClassPrototype>element).instances.values()) {\r\n          let instanceName = name;\r\n          if (instance.is(CommonFlags.GENERIC)) {\r\n            let fullName = instance.internalName;\r\n            instanceName += fullName.substring(fullName.lastIndexOf(\"<\"));\r\n          }\r\n          let ctor = instance.constructorInstance;\r\n          if (ctor) this.makeModuleExport(instanceName + INSTANCE_DELIMITER + ctor.simpleName, ctor, prefix);\r\n          this.makeModuleExport(instanceName, instance, prefix);\r\n        }\r\n        break;\r\n      }\r\n\r\n      // all possible members already handled above\r\n      case ElementKind.ENUM:\r\n      case ElementKind.CLASS:\r\n      case ElementKind.NAMESPACE: break;\r\n\r\n      default: assert(false);\r\n    }\r\n  }\r\n\r\n  // sources\r\n\r\n  /** Compiles a source by looking it up by path first. */\r\n  compileSourceByPath(normalizedPathWithoutExtension: string, reportNode: Node): void {\r\n    var source = this.program.lookupSourceByPath(normalizedPathWithoutExtension);\r\n    if (source) this.compileSource(source);\r\n    else {\r\n      this.error(\r\n        DiagnosticCode.File_0_not_found,\r\n        reportNode.range, normalizedPathWithoutExtension\r\n      );\r\n    }\r\n  }\r\n\r\n  /** Compiles a source. */\r\n  compileSource(source: Source): void {\r\n    if (source.is(CommonFlags.COMPILED)) return;\r\n    source.set(CommonFlags.COMPILED);\r\n\r\n    // compile top-level statements\r\n    var noTreeShaking = this.options.noTreeShaking;\r\n    var isEntry = source.isEntry;\r\n    var startFunctionInstance = this.startFunctionInstance;\r\n    var startFunctionBody = this.startFunctionBody;\r\n    var statements = source.statements;\r\n    for (let i = 0, k = statements.length; i < k; ++i) {\r\n      let statement = statements[i];\r\n      switch (statement.kind) {\r\n        case NodeKind.CLASSDECLARATION: {\r\n          if (\r\n            (noTreeShaking || (isEntry && statement.is(CommonFlags.EXPORT))) &&\r\n            !(<ClassDeclaration>statement).isGeneric\r\n          ) {\r\n            this.compileClassDeclaration(<ClassDeclaration>statement, [], null);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.INTERFACEDECLARATION: break;\r\n        case NodeKind.ENUMDECLARATION: {\r\n          if (noTreeShaking || (isEntry && statement.is(CommonFlags.EXPORT))) {\r\n            this.compileEnumDeclaration(<EnumDeclaration>statement);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.FUNCTIONDECLARATION: {\r\n          if (\r\n            (noTreeShaking || (isEntry && statement.is(CommonFlags.EXPORT))) &&\r\n            !(<FunctionDeclaration>statement).isGeneric\r\n          ) {\r\n            this.compileFunctionDeclaration(<FunctionDeclaration>statement, []);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.IMPORT: {\r\n          this.compileSourceByPath(\r\n            (<ImportStatement>statement).normalizedPath,\r\n            (<ImportStatement>statement).path\r\n          );\r\n          break;\r\n        }\r\n        case NodeKind.NAMESPACEDECLARATION: {\r\n          if (noTreeShaking || (isEntry && statement.is(CommonFlags.EXPORT))) {\r\n            this.compileNamespaceDeclaration(<NamespaceDeclaration>statement);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.VARIABLE: { // global, always compiled as initializers might have side effects\r\n          let variableInit = this.compileVariableStatement(<VariableStatement>statement);\r\n          if (variableInit) startFunctionBody.push(variableInit);\r\n          break;\r\n        }\r\n        case NodeKind.EXPORT: {\r\n          if ((<ExportStatement>statement).normalizedPath != null) {\r\n            this.compileSourceByPath(\r\n              <string>(<ExportStatement>statement).normalizedPath,\r\n              <StringLiteralExpression>(<ExportStatement>statement).path\r\n            );\r\n          }\r\n          if (noTreeShaking || isEntry) {\r\n            this.compileExportStatement(<ExportStatement>statement);\r\n          }\r\n          break;\r\n        }\r\n        default: { // otherwise a top-level statement that is part of the start function's body\r\n          let previousFunction = this.currentFunction;\r\n          this.currentFunction = startFunctionInstance;\r\n          startFunctionBody.push(this.compileStatement(statement));\r\n          this.currentFunction = previousFunction;\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  // globals\r\n\r\n  compileGlobalDeclaration(declaration: VariableDeclaration): Global | null {\r\n    // look up the initialized program element\r\n    var element = assert(this.program.elementsLookup.get(declaration.fileLevelInternalName));\r\n    assert(element.kind == ElementKind.GLOBAL);\r\n    if (!this.compileGlobal(<Global>element)) return null; // reports\r\n    return <Global>element;\r\n  }\r\n\r\n  compileGlobal(global: Global): bool {\r\n    if (global.is(CommonFlags.COMPILED)) return true;\r\n    global.set(CommonFlags.COMPILED);\r\n\r\n    var module = this.module;\r\n    var declaration = global.declaration;\r\n    var initExpr: ExpressionRef = 0;\r\n\r\n    if (global.type == Type.void) { // type is void if not yet resolved or not annotated\r\n      if (declaration) {\r\n\r\n        // resolve now if annotated\r\n        if (declaration.type) {\r\n          let resolvedType = this.resolver.resolveType(declaration.type); // reports\r\n          if (!resolvedType) return false;\r\n          if (resolvedType == Type.void) {\r\n            this.error(\r\n              DiagnosticCode.Type_expected,\r\n              declaration.type.range\r\n            );\r\n            return false;\r\n          }\r\n          global.type = resolvedType;\r\n\r\n        // infer from initializer if not annotated\r\n        } else if (declaration.initializer) { // infer type using void/NONE for literal inference\r\n          initExpr = this.compileExpressionRetainType( // reports\r\n            declaration.initializer,\r\n            Type.void,\r\n            WrapMode.WRAP\r\n          );\r\n          if (this.currentType == Type.void) {\r\n            this.error(\r\n              DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n              declaration.initializer.range, this.currentType.toString(), \"<auto>\"\r\n            );\r\n            return false;\r\n          }\r\n          global.type = this.currentType;\r\n\r\n        // must either be annotated or have an initializer\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Type_expected,\r\n            declaration.name.range.atEnd\r\n          );\r\n          return false;\r\n        }\r\n      } else {\r\n        assert(false); // must have a declaration if 'void' (and thus resolved later on)\r\n      }\r\n    }\r\n\r\n    // ambient builtins like 'HEAP_BASE' need to be resolved but are added explicitly\r\n    if (global.is(CommonFlags.AMBIENT) && global.hasDecorator(DecoratorFlags.BUILTIN)) return true;\r\n\r\n    var nativeType = global.type.toNativeType();\r\n    var isDeclaredConstant = global.is(CommonFlags.CONST) || global.is(CommonFlags.STATIC | CommonFlags.READONLY);\r\n\r\n    // handle imports\r\n    if (global.is(CommonFlags.AMBIENT)) {\r\n\r\n      // constant global\r\n      if (isDeclaredConstant || this.options.hasFeature(Feature.MUTABLE_GLOBAL)) {\r\n        global.set(CommonFlags.MODULE_IMPORT);\r\n        if (declaration) {\r\n          mangleImportName(global, declaration, global.parent);\r\n        } else {\r\n          mangleImportName_moduleName = \"env\";\r\n          mangleImportName_elementName = global.simpleName;\r\n        }\r\n        module.addGlobalImport(\r\n          global.internalName,\r\n          mangleImportName_moduleName,\r\n          mangleImportName_elementName,\r\n          nativeType\r\n        );\r\n        global.set(CommonFlags.COMPILED);\r\n        return true;\r\n\r\n      // importing mutable globals is not supported in the MVP\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          assert(declaration).range\r\n        );\r\n      }\r\n      return false;\r\n    }\r\n\r\n    // the MVP does not yet support initializer expressions other than constant values (and constant\r\n    // get_globals), hence such initializations must be performed in the start function for now.\r\n    var initializeInStart = false;\r\n\r\n    // evaluate initializer if present\r\n    if (declaration !== null && declaration.initializer !== null) {\r\n      if (!initExpr) {\r\n        initExpr = this.compileExpression(\r\n          declaration.initializer,\r\n          global.type,\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.WRAP\r\n        );\r\n      }\r\n\r\n      if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n        if (isDeclaredConstant) {\r\n          initExpr = module.precomputeExpression(initExpr);\r\n          if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n            this.warning(\r\n              DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n              declaration.range\r\n            );\r\n            initializeInStart = true;\r\n          }\r\n        } else {\r\n          initializeInStart = true;\r\n        }\r\n      }\r\n\r\n      // explicitly inline if annotated\r\n      if (global.hasDecorator(DecoratorFlags.INLINE)) {\r\n        if (!initializeInStart) { // reported above\r\n          assert(getExpressionId(initExpr) == ExpressionId.Const);\r\n          let exprType = getExpressionType(initExpr);\r\n          switch (exprType) {\r\n            case NativeType.I32: {\r\n              global.constantValueKind = ConstantValueKind.INTEGER;\r\n              global.constantIntegerValue = i64_new(getConstValueI32(initExpr), 0);\r\n              break;\r\n            }\r\n            case NativeType.I64: {\r\n              global.constantValueKind = ConstantValueKind.INTEGER;\r\n              global.constantIntegerValue = i64_new(\r\n                getConstValueI64Low(initExpr),\r\n                getConstValueI64High(initExpr)\r\n              );\r\n              break;\r\n            }\r\n            case NativeType.F32: {\r\n              global.constantValueKind = ConstantValueKind.FLOAT;\r\n              global.constantFloatValue = getConstValueF32(initExpr);\r\n              break;\r\n            }\r\n            case NativeType.F64: {\r\n              global.constantValueKind = ConstantValueKind.FLOAT;\r\n              global.constantFloatValue = getConstValueF64(initExpr);\r\n              break;\r\n            }\r\n            default: {\r\n              assert(false);\r\n              return false;\r\n            }\r\n          }\r\n          global.set(CommonFlags.INLINED); // inline the value from now on\r\n        }\r\n      }\r\n\r\n    // initialize to zero if there's no initializer\r\n    } else {\r\n      initExpr = global.type.toNativeZero(module);\r\n    }\r\n\r\n    var internalName = global.internalName;\r\n\r\n    if (initializeInStart) { // initialize to mutable zero and set the actual value in start\r\n      module.addGlobal(internalName, nativeType, true, global.type.toNativeZero(module));\r\n      this.startFunctionBody.push(module.createSetGlobal(internalName, initExpr));\r\n\r\n    } else { // compile normally\r\n      module.addGlobal(internalName, nativeType, !isDeclaredConstant, initExpr);\r\n    }\r\n    return true;\r\n  }\r\n\r\n  // enums\r\n\r\n  compileEnumDeclaration(declaration: EnumDeclaration): Enum | null {\r\n    var element = assert(this.program.elementsLookup.get(declaration.fileLevelInternalName));\r\n    assert(element.kind == ElementKind.ENUM);\r\n    if (!this.compileEnum(<Enum>element)) return null;\r\n    return <Enum>element;\r\n  }\r\n\r\n  compileEnum(element: Enum): bool {\r\n    if (element.is(CommonFlags.COMPILED)) return true;\r\n    element.set(CommonFlags.COMPILED);\r\n\r\n    var module = this.module;\r\n    this.currentEnum = element;\r\n    var previousValue: EnumValue | null = null;\r\n    var previousValueIsMut = false;\r\n\r\n    if (element.members) {\r\n      for (let member of element.members.values()) {\r\n        if (member.kind != ElementKind.ENUMVALUE) continue; // happens if an enum is also a namespace\r\n        let initInStart = false;\r\n        let val = <EnumValue>member;\r\n        let valueDeclaration = val.declaration;\r\n        val.set(CommonFlags.COMPILED);\r\n        let initExpr: ExpressionRef;\r\n        if (valueDeclaration.value) {\r\n          initExpr = this.compileExpression(\r\n            <Expression>valueDeclaration.value,\r\n            Type.i32,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n          if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n            if (element.is(CommonFlags.CONST)) {\r\n              initExpr = module.precomputeExpression(initExpr);\r\n              if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n                this.error(\r\n                  DiagnosticCode.In_const_enum_declarations_member_initializer_must_be_constant_expression,\r\n                  valueDeclaration.value.range\r\n                );\r\n                initInStart = true;\r\n              }\r\n            } else {\r\n              initInStart = true;\r\n            }\r\n          }\r\n        } else if (previousValue == null) {\r\n          initExpr = module.createI32(0);\r\n        } else {\r\n          if (previousValueIsMut) {\r\n            this.error(\r\n              DiagnosticCode.Enum_member_must_have_initializer,\r\n              valueDeclaration.range\r\n            );\r\n          }\r\n          initExpr = module.createBinary(BinaryOp.AddI32,\r\n            module.createGetGlobal(previousValue.internalName, NativeType.I32),\r\n            module.createI32(1)\r\n          );\r\n          initExpr = module.precomputeExpression(initExpr);\r\n          if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n            if (element.is(CommonFlags.CONST)) {\r\n              this.error(\r\n                DiagnosticCode.In_const_enum_declarations_member_initializer_must_be_constant_expression,\r\n                valueDeclaration.range\r\n              );\r\n            }\r\n            initInStart = true;\r\n          }\r\n        }\r\n        if (initInStart) {\r\n          module.addGlobal(val.internalName, NativeType.I32, true, module.createI32(0));\r\n          this.startFunctionBody.push(module.createSetGlobal(val.internalName, initExpr));\r\n          previousValueIsMut = true;\r\n        } else {\r\n          module.addGlobal(val.internalName, NativeType.I32, !element.is(CommonFlags.CONST), initExpr);\r\n          previousValueIsMut = false;\r\n        }\r\n        previousValue = <EnumValue>val;\r\n      }\r\n    }\r\n    this.currentEnum = null;\r\n    return true;\r\n  }\r\n\r\n  // functions\r\n\r\n  /** Compiles a top-level function given its declaration. */\r\n  compileFunctionDeclaration(\r\n    declaration: FunctionDeclaration,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ): Function | null {\r\n    var element = assert(this.program.elementsLookup.get(declaration.fileLevelInternalName));\r\n    assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n    return this.compileFunctionUsingTypeArguments( // reports\r\n      <FunctionPrototype>element,\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      null, // no outer scope (is top level)\r\n      (<FunctionPrototype>element).declaration.name\r\n    );\r\n  }\r\n\r\n  /** Resolves the specified type arguments prior to compiling the resulting function instance. */\r\n  compileFunctionUsingTypeArguments(\r\n    prototype: FunctionPrototype,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    outerScope: Flow | null,\r\n    reportNode: Node\r\n  ): Function | null {\r\n    var instance = this.resolver.resolveFunctionInclTypeArguments(\r\n      prototype,\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      reportNode\r\n    );\r\n    if (!instance) return null;\r\n    instance.outerScope = outerScope;\r\n    if (!this.compileFunction(instance)) return null; // reports\r\n    return instance;\r\n  }\r\n\r\n  /** Either reuses or creates the function type matching the specified signature. */\r\n  ensureFunctionType(\r\n    parameterTypes: Type[] | null,\r\n    returnType: Type,\r\n    thisType: Type | null = null\r\n  ): FunctionTypeRef {\r\n    var numParameters = parameterTypes ? parameterTypes.length : 0;\r\n    var paramTypes: NativeType[];\r\n    var index = 0;\r\n    if (thisType) {\r\n      paramTypes = new Array(1 + numParameters);\r\n      paramTypes[0] = thisType.toNativeType();\r\n      index = 1;\r\n    } else {\r\n      paramTypes = new Array(numParameters);\r\n    }\r\n    if (parameterTypes) {\r\n      for (let i = 0; i < numParameters; ++i, ++index) {\r\n        paramTypes[index] = parameterTypes[i].toNativeType();\r\n      }\r\n    }\r\n    var resultType = returnType.toNativeType();\r\n    var module = this.module;\r\n    var typeRef = module.getFunctionTypeBySignature(resultType, paramTypes);\r\n    if (!typeRef) {\r\n      let name = Signature.makeSignatureString(parameterTypes, returnType, thisType);\r\n      typeRef = module.addFunctionType(name, resultType, paramTypes);\r\n    }\r\n    return typeRef;\r\n  }\r\n\r\n  /** Compiles a readily resolved function instance. */\r\n  compileFunction(instance: Function): bool {\r\n    if (instance.is(CommonFlags.COMPILED)) return true;\r\n    assert(!(instance.is(CommonFlags.AMBIENT) && instance.hasDecorator(DecoratorFlags.BUILTIN)));\r\n    instance.set(CommonFlags.COMPILED);\r\n\r\n    // check that modifiers are matching\r\n    var declaration = instance.prototype.declaration;\r\n    var body = declaration.body;\r\n    if (body) {\r\n      if (instance.is(CommonFlags.AMBIENT)) {\r\n        this.error(\r\n          DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,\r\n          declaration.name.range\r\n        );\r\n      }\r\n    } else {\r\n      if (!instance.is(CommonFlags.AMBIENT)) {\r\n        this.error(\r\n          DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,\r\n          declaration.name.range\r\n        );\r\n      }\r\n    }\r\n\r\n    var ref: FunctionRef;\r\n    var signature = instance.signature;\r\n    var typeRef = this.ensureFunctionType(signature.parameterTypes, signature.returnType, signature.thisType);\r\n    var module = this.module;\r\n    if (body) {\r\n      let isConstructor = instance.is(CommonFlags.CONSTRUCTOR);\r\n      let returnType = instance.signature.returnType;\r\n\r\n      // compile body\r\n      let previousFunction = this.currentFunction;\r\n      this.currentFunction = instance;\r\n      let flow = instance.flow;\r\n      let stmt: ExpressionRef;\r\n      if (body.kind == NodeKind.EXPRESSION) { // () => expression\r\n        assert(!instance.isAny(CommonFlags.CONSTRUCTOR | CommonFlags.GET | CommonFlags.SET | CommonFlags.MAIN));\r\n        assert(instance.is(CommonFlags.ARROW));\r\n        stmt = this.compileExpression(\r\n          (<ExpressionStatement>body).expression,\r\n          returnType,\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.NONE\r\n        );\r\n        flow.set(FlowFlags.RETURNS);\r\n        if (!flow.canOverflow(stmt, returnType)) flow.set(FlowFlags.RETURNS_WRAPPED);\r\n        flow.finalize();\r\n      } else {\r\n        assert(body.kind == NodeKind.BLOCK);\r\n        let stmts = this.compileStatements((<BlockStatement>body).statements);\r\n        if (instance.is(CommonFlags.MAIN)) {\r\n          module.addGlobal(\"~started\", NativeType.I32, true, module.createI32(0));\r\n          stmts.unshift(\r\n            module.createIf(\r\n              module.createUnary(\r\n                UnaryOp.EqzI32,\r\n                module.createGetGlobal(\"~started\", NativeType.I32)\r\n              ),\r\n              module.createBlock(null, [\r\n                module.createCall(\"start\", null, NativeType.None),\r\n                module.createSetGlobal(\"~started\", module.createI32(1))\r\n              ])\r\n            )\r\n          );\r\n        }\r\n        flow.finalize();\r\n        if (isConstructor) {\r\n          let nativeSizeType = this.options.nativeSizeType;\r\n          assert(instance.is(CommonFlags.INSTANCE));\r\n\r\n          // implicitly return `this` if the constructor doesn't always return on its own\r\n          if (!flow.is(FlowFlags.RETURNS)) {\r\n\r\n            // if all branches are guaranteed to allocate, skip the final conditional allocation\r\n            if (flow.is(FlowFlags.ALLOCATES)) {\r\n              stmts.push(module.createGetLocal(0, nativeSizeType));\r\n\r\n            // if not all branches are guaranteed to allocate, also append a conditional allocation\r\n            } else {\r\n              let parent = assert(instance.parent);\r\n              assert(parent.kind == ElementKind.CLASS);\r\n              stmts.push(module.createTeeLocal(0,\r\n                this.makeConditionalAllocate(<Class>parent, declaration.name)\r\n              ));\r\n            }\r\n          }\r\n\r\n        // make sure all branches return\r\n        } else if (returnType != Type.void && !flow.is(FlowFlags.RETURNS)) {\r\n          this.error(\r\n            DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,\r\n            declaration.signature.returnType.range\r\n          );\r\n        }\r\n        stmt = !stmts.length\r\n          ? module.createNop()\r\n          : stmts.length == 1\r\n            ? stmts[0]\r\n            : module.createBlock(null, stmts, returnType.toNativeType());\r\n      }\r\n      this.currentFunction = previousFunction;\r\n\r\n      // create the function\r\n      ref = module.addFunction(\r\n        instance.internalName,\r\n        typeRef,\r\n        typesToNativeTypes(instance.additionalLocals),\r\n        stmt\r\n      );\r\n\r\n      // concrete functions cannot have an annotated external name\r\n      if (instance.hasDecorator(DecoratorFlags.EXTERNAL)) {\r\n        let decorator = assert(findDecorator(DecoratorKind.EXTERNAL, declaration.decorators));\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          decorator.range\r\n        );\r\n      }\r\n\r\n    } else {\r\n      instance.set(CommonFlags.MODULE_IMPORT);\r\n      mangleImportName(instance, declaration, instance.prototype.parent); // TODO: check for duplicates\r\n\r\n      // create the function import\r\n      ref = module.addFunctionImport(\r\n        instance.internalName,\r\n        mangleImportName_moduleName,\r\n        mangleImportName_elementName,\r\n        typeRef\r\n      );\r\n    }\r\n\r\n    instance.finalize(module, ref);\r\n    return true;\r\n  }\r\n\r\n  // namespaces\r\n\r\n  compileNamespaceDeclaration(declaration: NamespaceDeclaration): void {\r\n    var members = declaration.members;\r\n    var noTreeShaking = this.options.noTreeShaking;\r\n    for (let i = 0, k = members.length; i < k; ++i) {\r\n      let member = members[i];\r\n      switch (member.kind) {\r\n        case NodeKind.CLASSDECLARATION: {\r\n          if (\r\n            (noTreeShaking || member.is(CommonFlags.EXPORT)) &&\r\n            !(<ClassDeclaration>member).isGeneric\r\n          ) {\r\n            this.compileClassDeclaration(<ClassDeclaration>member, []);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.INTERFACEDECLARATION: {\r\n          if (\r\n            (noTreeShaking || member.is(CommonFlags.EXPORT)) &&\r\n            !(<InterfaceDeclaration>member).isGeneric\r\n          ) {\r\n            this.compileInterfaceDeclaration(<InterfaceDeclaration>member, []);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.ENUMDECLARATION: {\r\n          if (noTreeShaking || member.is(CommonFlags.EXPORT)) {\r\n            this.compileEnumDeclaration(<EnumDeclaration>member);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.FUNCTIONDECLARATION: {\r\n          if (\r\n            (noTreeShaking || member.is(CommonFlags.EXPORT)) &&\r\n            !(<FunctionDeclaration>member).isGeneric\r\n          ) {\r\n            this.compileFunctionDeclaration(<FunctionDeclaration>member, []);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.NAMESPACEDECLARATION: {\r\n          if (noTreeShaking || member.is(CommonFlags.EXPORT)) {\r\n            this.compileNamespaceDeclaration(<NamespaceDeclaration>member);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.VARIABLE: {\r\n          if (noTreeShaking || member.is(CommonFlags.EXPORT)) {\r\n            let variableInit = this.compileVariableStatement(<VariableStatement>member, true);\r\n            if (variableInit) this.startFunctionBody.push(variableInit);\r\n          }\r\n          break;\r\n        }\r\n        default: assert(false);\r\n      }\r\n    }\r\n  }\r\n\r\n  compileNamespace(ns: Namespace): void {\r\n    if (!ns.members) return;\r\n\r\n    var noTreeShaking = this.options.noTreeShaking;\r\n    for (let element of ns.members.values()) {\r\n      switch (element.kind) {\r\n        case ElementKind.CLASS_PROTOTYPE: {\r\n          if (\r\n            (\r\n              noTreeShaking ||\r\n              (<ClassPrototype>element).is(CommonFlags.EXPORT)\r\n            ) && !(<ClassPrototype>element).is(CommonFlags.GENERIC)\r\n          ) {\r\n            this.compileClassUsingTypeArguments(<ClassPrototype>element, []);\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.ENUM: {\r\n          this.compileEnum(<Enum>element);\r\n          break;\r\n        }\r\n        case ElementKind.FUNCTION_PROTOTYPE: {\r\n          if (\r\n            (\r\n              noTreeShaking || (<FunctionPrototype>element).is(CommonFlags.EXPORT)\r\n            ) && !(<FunctionPrototype>element).is(CommonFlags.GENERIC)\r\n          ) {\r\n            if (element.hasDecorator(DecoratorFlags.BUILTIN)) break;\r\n            this.compileFunctionUsingTypeArguments(\r\n              <FunctionPrototype>element,\r\n              [],\r\n              null, // no contextual type arguments\r\n              null, // no outer scope\r\n              (<FunctionPrototype>element).declaration.name\r\n            );\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.GLOBAL: {\r\n          this.compileGlobal(<Global>element);\r\n          break;\r\n        }\r\n        case ElementKind.NAMESPACE: {\r\n          this.compileNamespace(<Namespace>element);\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  // exports\r\n\r\n  compileExportStatement(statement: ExportStatement): void {\r\n    var fileLevelExports = this.program.fileLevelExports;\r\n    var members = statement.members;\r\n    if (!members) return; // filespace\r\n    for (let i = 0, k = members.length; i < k; ++i) {\r\n      let member = members[i];\r\n      let element = fileLevelExports.get(\r\n        statement.range.source.internalPath + PATH_DELIMITER + member.externalName.text\r\n      );\r\n      if (!element) continue; // reported in Program#initialize\r\n      switch (element.kind) {\r\n        case ElementKind.CLASS_PROTOTYPE: {\r\n          if (!(<ClassPrototype>element).is(CommonFlags.GENERIC)) {\r\n            this.compileClassUsingTypeArguments(<ClassPrototype>element, []);\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.ENUM: {\r\n          this.compileEnum(<Enum>element);\r\n          break;\r\n        }\r\n        case ElementKind.FUNCTION_PROTOTYPE: {\r\n          if (\r\n            !(<FunctionPrototype>element).is(CommonFlags.GENERIC) &&\r\n            statement.range.source.isEntry\r\n          ) {\r\n            this.compileFunctionUsingTypeArguments(\r\n              <FunctionPrototype>element,\r\n              [],\r\n              null, // no contextual type arguments\r\n              null, // no outer scope\r\n              (<FunctionPrototype>element).declaration.name\r\n            );\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.GLOBAL: {\r\n          this.compileGlobal(<Global>element);\r\n          break;\r\n        }\r\n        case ElementKind.NAMESPACE: {\r\n          this.compileNamespace(<Namespace>element);\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  // classes\r\n\r\n  compileClassDeclaration(\r\n    declaration: ClassDeclaration,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ): void {\r\n    var element = assert(this.program.elementsLookup.get(declaration.fileLevelInternalName));\r\n    assert(element.kind == ElementKind.CLASS_PROTOTYPE);\r\n    this.compileClassUsingTypeArguments(\r\n      <ClassPrototype>element,\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      declaration\r\n    );\r\n  }\r\n\r\n  compileClassUsingTypeArguments(\r\n    prototype: ClassPrototype,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    alternativeReportNode: Node | null = null\r\n  ): void {\r\n    var instance = this.resolver.resolveClassInclTypeArguments(\r\n      prototype,\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      alternativeReportNode || prototype.declaration\r\n    );\r\n    if (!instance) return;\r\n    this.compileClass(instance);\r\n  }\r\n\r\n  compileClass(instance: Class): bool {\r\n    if (instance.is(CommonFlags.COMPILED)) return true;\r\n    instance.set(CommonFlags.COMPILED);\r\n\r\n    var staticMembers = instance.prototype.members;\r\n    if (staticMembers) {\r\n      for (let element of staticMembers.values()) {\r\n        switch (element.kind) {\r\n          case ElementKind.GLOBAL: {\r\n            this.compileGlobal(<Global>element);\r\n            break;\r\n          }\r\n          case ElementKind.FUNCTION_PROTOTYPE: {\r\n            if (\r\n              !(<FunctionPrototype>element).is(CommonFlags.GENERIC)\r\n            ) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                <FunctionPrototype>element,\r\n                [], null, null,\r\n                (<FunctionPrototype>element).declaration.name\r\n              );\r\n            }\r\n            break;\r\n          }\r\n          case ElementKind.PROPERTY: {\r\n            let getter = (<Property>element).getterPrototype;\r\n            if (getter) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                getter,\r\n                [], null, null,\r\n                getter.declaration.name\r\n              );\r\n            }\r\n            let setter = (<Property>element).setterPrototype;\r\n            if (setter) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                setter,\r\n                [], null, null,\r\n                setter.declaration.name\r\n              );\r\n            }\r\n            break;\r\n          }\r\n        }\r\n      }\r\n    }\r\n    var ctorInstance = instance.constructorInstance;\r\n    if (ctorInstance) this.compileFunction(ctorInstance);\r\n    var instanceMembers = instance.members;\r\n    if (instanceMembers) {\r\n      for (let element of instanceMembers.values()) {\r\n        switch (element.kind) {\r\n          case ElementKind.FUNCTION_PROTOTYPE: {\r\n            if (\r\n              !(<FunctionPrototype>element).is(CommonFlags.GENERIC)\r\n            ) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                <FunctionPrototype>element,\r\n                [],\r\n                instance.contextualTypeArguments,\r\n                null, // no outer scope\r\n                (<FunctionPrototype>element).declaration.name\r\n              );\r\n            }\r\n            break;\r\n          }\r\n          case ElementKind.FIELD: {\r\n            element.set(CommonFlags.COMPILED);\r\n            break;\r\n          }\r\n          case ElementKind.PROPERTY: {\r\n            let getter = (<Property>element).getterPrototype;\r\n            if (getter) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                getter,\r\n                [], instance.contextualTypeArguments, null,\r\n                getter.declaration.name\r\n              );\r\n            }\r\n            let setter = (<Property>element).setterPrototype;\r\n            if (setter) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                setter,\r\n                [], instance.contextualTypeArguments, null,\r\n                setter.declaration.name\r\n              );\r\n            }\r\n            break;\r\n          }\r\n        }\r\n      }\r\n    }\r\n    return true;\r\n  }\r\n\r\n  compileInterfaceDeclaration(\r\n    declaration: InterfaceDeclaration,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    alternativeReportNode: Node | null = null\r\n  ): void {\r\n    // TODO\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      declaration.range\r\n    );\r\n  }\r\n\r\n  // memory\r\n\r\n  /** Adds a static memory segment with the specified data. */\r\n  addMemorySegment(buffer: Uint8Array, alignment: i32 = 8): MemorySegment {\r\n    var memoryOffset = i64_align(this.memoryOffset, alignment);\r\n    var segment = MemorySegment.create(buffer, memoryOffset);\r\n    this.memorySegments.push(segment);\r\n    this.memoryOffset = i64_add(memoryOffset, i64_new(buffer.length, 0));\r\n    return segment;\r\n  }\r\n\r\n  // function table\r\n\r\n  /** Ensures that a table entry exists for the specified function and returns its index. */\r\n  ensureFunctionTableEntry(func: Function): i32 {\r\n    assert(func.is(CommonFlags.COMPILED));\r\n    if (func.functionTableIndex >= 0) {\r\n      return func.functionTableIndex;\r\n    }\r\n    var functionTable = this.functionTable;\r\n    var index = functionTable.length;\r\n    if (!func.is(CommonFlags.TRAMPOLINE) && func.signature.requiredParameters < func.signature.parameterTypes.length) {\r\n      // insert the trampoline if the function has optional parameters\r\n      func = this.ensureTrampoline(func);\r\n    }\r\n    functionTable.push(func.ref);\r\n    func.functionTableIndex = index;\r\n    return index;\r\n  }\r\n\r\n  // statements\r\n\r\n  compileStatement(statement: Statement): ExpressionRef {\r\n    var module = this.module;\r\n    var stmt: ExpressionRef;\r\n    switch (statement.kind) {\r\n      case NodeKind.BLOCK: {\r\n        stmt = this.compileBlockStatement(<BlockStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.BREAK: {\r\n        stmt = this.compileBreakStatement(<BreakStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.CONTINUE: {\r\n        stmt = this.compileContinueStatement(<ContinueStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.DO: {\r\n        stmt = this.compileDoStatement(<DoStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.EMPTY: {\r\n        stmt = this.compileEmptyStatement(<EmptyStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.EXPRESSION: {\r\n        stmt = this.compileExpressionStatement(<ExpressionStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.FOR: {\r\n        stmt = this.compileForStatement(<ForStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.IF: {\r\n        stmt = this.compileIfStatement(<IfStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.RETURN: {\r\n        stmt = this.compileReturnStatement(<ReturnStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.SWITCH: {\r\n        stmt = this.compileSwitchStatement(<SwitchStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.THROW: {\r\n        stmt = this.compileThrowStatement(<ThrowStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.TRY: {\r\n        stmt = this.compileTryStatement(<TryStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.VARIABLE: {\r\n        stmt = this.compileVariableStatement(<VariableStatement>statement);\r\n        if (!stmt) stmt = module.createNop();\r\n        break;\r\n      }\r\n      case NodeKind.VOID: {\r\n        stmt = this.compileVoidStatement(<VoidStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.WHILE: {\r\n        stmt = this.compileWhileStatement(<WhileStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.TYPEDECLARATION: {\r\n        // type declarations must be top-level because function bodies are evaluated when\r\n        // reachaable only.\r\n        if (this.currentFunction == this.startFunctionInstance) {\r\n          return module.createNop();\r\n        }\r\n        // otherwise fall-through\r\n      }\r\n      default: {\r\n        assert(false);\r\n        stmt = module.createUnreachable();\r\n      }\r\n    }\r\n    if (this.options.sourceMap) this.addDebugLocation(stmt, statement.range);\r\n    return stmt;\r\n  }\r\n\r\n  compileStatements(statements: Statement[]): ExpressionRef[] {\r\n    var numStatements = statements.length;\r\n    var stmts = new Array<ExpressionRef>(numStatements);\r\n    stmts.length = 0;\r\n    var flow = this.currentFunction.flow;\r\n    for (let i = 0; i < numStatements; ++i) {\r\n      let stmt = this.compileStatement(statements[i]);\r\n      switch (getExpressionId(stmt)) {\r\n        case ExpressionId.Block: {\r\n          if (!getBlockName(stmt)) {\r\n            for (let j = 0, k = getBlockChildCount(stmt); j < k; ++j) stmts.push(getBlockChild(stmt, j));\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: stmts.push(stmt);\r\n        case ExpressionId.Nop:\r\n      }\r\n      if (flow.isAny(FlowFlags.ANY_TERMINATING)) {\r\n        if (needsExplicitUnreachable(stmt)) stmts.push(this.module.createUnreachable());\r\n        break;\r\n      }\r\n    }\r\n    return stmts;\r\n  }\r\n\r\n  compileBlockStatement(statement: BlockStatement): ExpressionRef {\r\n    var statements = statement.statements;\r\n    var parentFlow = this.currentFunction.flow;\r\n    var flow = parentFlow.fork();\r\n    this.currentFunction.flow = flow;\r\n\r\n    var stmts = this.compileStatements(statements);\r\n    var stmt = stmts.length == 0\r\n      ? this.module.createNop()\r\n      : stmts.length == 1\r\n        ? stmts[0]\r\n        : this.module.createBlock(null, stmts,getExpressionType(stmts[stmts.length - 1]));\r\n\r\n    this.currentFunction.flow = flow.free();\r\n    parentFlow.inherit(flow);\r\n    return stmt;\r\n  }\r\n\r\n  compileBreakStatement(statement: BreakStatement): ExpressionRef {\r\n    var module = this.module;\r\n    if (statement.label) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        statement.label.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    var flow = this.currentFunction.flow;\r\n    var breakLabel = flow.breakLabel;\r\n    if (breakLabel == null) {\r\n      this.error(\r\n        DiagnosticCode.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement,\r\n        statement.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    flow.set(FlowFlags.BREAKS);\r\n    return module.createBreak(breakLabel);\r\n  }\r\n\r\n  compileContinueStatement(statement: ContinueStatement): ExpressionRef {\r\n    var module = this.module;\r\n    var label = statement.label;\r\n    if (label) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        label.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    // Check if 'continue' is allowed here\r\n    var flow = this.currentFunction.flow;\r\n    var continueLabel = flow.continueLabel;\r\n    if (continueLabel == null) {\r\n      this.error(\r\n        DiagnosticCode.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement,\r\n        statement.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    flow.set(FlowFlags.CONTINUES);\r\n    return module.createBreak(continueLabel);\r\n  }\r\n\r\n  compileDoStatement(statement: DoStatement): ExpressionRef {\r\n    var currentFunction = this.currentFunction;\r\n    var module = this.module;\r\n\r\n    var label = currentFunction.enterBreakContext();\r\n    var parentFlow = currentFunction.flow;\r\n    var flow = parentFlow.fork();\r\n    currentFunction.flow = flow;\r\n    var breakLabel = \"break|\" + label;\r\n    flow.breakLabel = breakLabel;\r\n    var continueLabel = \"continue|\" + label;\r\n    flow.continueLabel = continueLabel;\r\n\r\n    var body = this.compileStatement(statement.statement);\r\n    var condExpr = this.makeIsTrueish(\r\n      this.compileExpression(statement.condition, Type.i32, ConversionKind.NONE, WrapMode.NONE),\r\n      this.currentType\r\n    );\r\n    // TODO: check if condition is always false and if so, omit it (just a block)\r\n\r\n    // Switch back to the parent flow\r\n    currentFunction.flow = flow.free();\r\n    currentFunction.leaveBreakContext();\r\n    var terminated = flow.isAny(FlowFlags.ANY_TERMINATING);\r\n    flow.unset(\r\n      FlowFlags.BREAKS |\r\n      FlowFlags.CONDITIONALLY_BREAKS |\r\n      FlowFlags.CONTINUES |\r\n      FlowFlags.CONDITIONALLY_CONTINUES\r\n    );\r\n    parentFlow.inherit(flow);\r\n\r\n    var block: ExpressionRef[] = [\r\n      module.createLoop(continueLabel,\r\n        terminated\r\n          ? body // skip trailing continue if unnecessary\r\n          : module.createBlock(null, [\r\n              body,\r\n              module.createBreak(continueLabel, condExpr)\r\n            ], NativeType.None)\r\n      )\r\n    ];\r\n    if (terminated) block.push(module.createUnreachable());\r\n    return module.createBlock(breakLabel, block);\r\n  }\r\n\r\n  compileEmptyStatement(statement: EmptyStatement): ExpressionRef {\r\n    return this.module.createNop();\r\n  }\r\n\r\n  compileExpressionStatement(statement: ExpressionStatement): ExpressionRef {\r\n    var expr = this.compileExpression(statement.expression, Type.void, ConversionKind.NONE, WrapMode.NONE);\r\n    if (this.currentType != Type.void) {\r\n      expr = this.module.createDrop(expr);\r\n      this.currentType = Type.void;\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  compileForStatement(statement: ForStatement): ExpressionRef {\r\n    // A for statement initiates a new branch with its own scoped variables\r\n    // possibly declared in its initializer, and break context.\r\n    var currentFunction = this.currentFunction;\r\n    var label = currentFunction.enterBreakContext();\r\n    var parentFlow = currentFunction.flow;\r\n    var flow = parentFlow.fork();\r\n    currentFunction.flow = flow;\r\n    var breakLabel = flow.breakLabel = \"break|\" + label;\r\n    flow.breakLabel = breakLabel;\r\n    var continueLabel = \"continue|\" + label;\r\n    flow.continueLabel = continueLabel;\r\n    var repeatLabel = \"repeat|\" + label;\r\n\r\n    // Compile in correct order\r\n    var module = this.module;\r\n    var initExpr = statement.initializer\r\n      ? this.compileStatement(<Statement>statement.initializer)\r\n      : 0;\r\n    var condExpr: ExpressionRef = 0;\r\n    var alwaysTrue = false;\r\n    if (statement.condition) {\r\n      condExpr = this.makeIsTrueish(\r\n        this.compileExpressionRetainType(<Expression>statement.condition, Type.bool, WrapMode.NONE),\r\n        this.currentType\r\n      );\r\n      // check if the condition is always true\r\n      let condPre = module.precomputeExpression(condExpr);\r\n      if (getExpressionId(condPre) == ExpressionId.Const) {\r\n        assert(getExpressionType(condPre) == NativeType.I32);\r\n        if (getConstValueI32(condPre) != 0) alwaysTrue = true;\r\n        // TODO: could skip compilation if the condition is always false here, but beware that the\r\n        // initializer could still declare new 'var's that are used later on.\r\n      }\r\n      // recompile to original\r\n      condExpr = this.makeIsTrueish(\r\n        this.compileExpressionRetainType(<Expression>statement.condition, Type.bool, WrapMode.NONE),\r\n        this.currentType\r\n      );\r\n    } else {\r\n      // omitted condition is always true\r\n      condExpr = module.createI32(1);\r\n      alwaysTrue = true;\r\n    }\r\n    var incrExpr = statement.incrementor\r\n      ? this.compileExpression(<Expression>statement.incrementor, Type.void, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n      : 0;\r\n    var bodyStatement = statement.statement;\r\n    var bodyExpr = bodyStatement.kind == NodeKind.BLOCK && (<BlockStatement>bodyStatement).statements.length == 1\r\n      ? this.compileStatement((<BlockStatement>bodyStatement).statements[0])\r\n      : this.compileStatement(bodyStatement);\r\n\r\n    // Switch back to the parent flow\r\n    currentFunction.flow = flow.free();\r\n    currentFunction.leaveBreakContext();\r\n    var usesContinue = flow.isAny(FlowFlags.CONTINUES | FlowFlags.CONDITIONALLY_CONTINUES);\r\n    flow.unset(\r\n      FlowFlags.BREAKS |\r\n      FlowFlags.CONDITIONALLY_BREAKS |\r\n      FlowFlags.CONTINUES |\r\n      FlowFlags.CONDITIONALLY_CONTINUES\r\n    );\r\n    if (alwaysTrue) parentFlow.inherit(flow);\r\n    else parentFlow.inheritConditional(flow);\r\n\r\n    var breakBlock = new Array<ExpressionRef>(); // outer 'break' block\r\n    if (initExpr) breakBlock.push(initExpr);\r\n\r\n    var repeatBlock = new Array<ExpressionRef>(); // block repeating the loop\r\n    if (usesContinue) {\r\n      repeatBlock.push(\r\n        module.createBlock(continueLabel, [ // inner 'continue' block\r\n          module.createBreak(breakLabel, module.createUnary(UnaryOp.EqzI32, condExpr)),\r\n          bodyExpr\r\n        ], NativeType.None)\r\n      );\r\n    } else { // can omit the 'continue' block\r\n      repeatBlock.push(\r\n        module.createBreak(breakLabel, module.createUnary(UnaryOp.EqzI32, condExpr))\r\n      );\r\n      repeatBlock.push(bodyExpr);\r\n    }\r\n    if (incrExpr) repeatBlock.push(incrExpr);\r\n    repeatBlock.push(\r\n      module.createBreak(repeatLabel)\r\n    );\r\n\r\n    breakBlock.push(\r\n      module.createLoop(repeatLabel, module.createBlock(null, repeatBlock, NativeType.None))\r\n    );\r\n\r\n    return module.createBlock(breakLabel, breakBlock);\r\n  }\r\n\r\n  compileIfStatement(statement: IfStatement): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n    var ifTrue = statement.ifTrue;\r\n    var ifFalse = statement.ifFalse;\r\n\r\n    // The condition doesn't initiate a branch yet\r\n    var condExpr = this.makeIsTrueish(\r\n      this.compileExpressionRetainType(statement.condition, Type.bool, WrapMode.NONE),\r\n      this.currentType\r\n    );\r\n\r\n    if (\r\n      !this.options.noTreeShaking ||\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT)\r\n    ) {\r\n      // Try to eliminate unnecesssary branches if the condition is constant\r\n      let condExprPrecomp = module.precomputeExpression(condExpr);\r\n      if (\r\n        getExpressionId(condExprPrecomp) == ExpressionId.Const &&\r\n        getExpressionType(condExprPrecomp) == NativeType.I32\r\n      ) {\r\n        return getConstValueI32(condExprPrecomp)\r\n          ? this.compileStatement(ifTrue)\r\n          : ifFalse\r\n            ? this.compileStatement(ifFalse)\r\n            : module.createNop();\r\n\r\n      // Otherwise recompile to the original and let the optimizer decide\r\n      } else /* if (condExpr != condExprPrecomp) <- not guaranteed */ {\r\n        condExpr = this.makeIsTrueish(\r\n          this.compileExpressionRetainType(statement.condition, Type.bool, WrapMode.NONE),\r\n          this.currentType\r\n        );\r\n      }\r\n    }\r\n\r\n    // Each arm initiates a branch\r\n    var parentFlow = currentFunction.flow;\r\n    var ifTrueFlow = parentFlow.fork();\r\n    currentFunction.flow = ifTrueFlow;\r\n    var ifTrueExpr = this.compileStatement(ifTrue);\r\n    currentFunction.flow = ifTrueFlow.free();\r\n\r\n    var ifFalseExpr: ExpressionRef = 0;\r\n    if (ifFalse) {\r\n      let ifFalseFlow = parentFlow.fork();\r\n      currentFunction.flow = ifFalseFlow;\r\n      ifFalseExpr = this.compileStatement(ifFalse);\r\n      currentFunction.flow = ifFalseFlow.free();\r\n      parentFlow.inheritMutual(ifTrueFlow, ifFalseFlow);\r\n    } else {\r\n      parentFlow.inheritConditional(ifTrueFlow);\r\n    }\r\n    return module.createIf(condExpr, ifTrueExpr, ifFalseExpr);\r\n  }\r\n\r\n  compileReturnStatement(statement: ReturnStatement): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n    var expr: ExpressionRef = 0;\r\n    var flow = currentFunction.flow;\r\n\r\n    // Remember that this flow returns\r\n    flow.set(FlowFlags.RETURNS);\r\n\r\n    if (statement.value) {\r\n      let returnType = flow.returnType;\r\n      if (returnType == Type.void) {\r\n        this.compileExpressionRetainType(statement.value, returnType, WrapMode.NONE);\r\n        this.error(\r\n          DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n          statement.value.range, this.currentType.toString(), returnType.toString()\r\n        );\r\n        this.currentType = Type.void;\r\n        return module.createUnreachable();\r\n      }\r\n      expr = this.compileExpression(\r\n        statement.value,\r\n        returnType,\r\n        ConversionKind.IMPLICIT,\r\n        currentFunction.is(CommonFlags.MODULE_EXPORT)\r\n          ? WrapMode.WRAP\r\n          : WrapMode.NONE\r\n      );\r\n\r\n      // Remember whether returning a properly wrapped value\r\n      if (!flow.canOverflow(expr, returnType)) flow.set(FlowFlags.RETURNS_WRAPPED);\r\n    }\r\n\r\n    // If the last statement anyway, make it the block's return value\r\n    if (isLastStatement(statement)) return expr ? expr : module.createNop();\r\n\r\n    // When inlining, break to the end of the inlined function's block (no need to wrap)\r\n    return flow.is(FlowFlags.INLINE_CONTEXT)\r\n      ? module.createBreak(assert(flow.returnLabel), 0, expr)\r\n      : module.createReturn(expr);\r\n  }\r\n\r\n  compileSwitchStatement(statement: SwitchStatement): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n\r\n    var cases = statement.cases;\r\n    var numCases = cases.length;\r\n    if (!numCases) {\r\n      return this.compileExpression(statement.condition, Type.void, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n    }\r\n\r\n    // Everything within a switch uses the same break context\r\n    var context = currentFunction.enterBreakContext();\r\n    var parentFlow = currentFunction.flow;\r\n\r\n    // introduce a local for evaluating the condition (exactly once)\r\n    var tempLocal = currentFunction.getTempLocal(Type.u32, false);\r\n    var tempLocalIndex = tempLocal.index;\r\n\r\n    // Prepend initializer to inner block. Does not initiate a new branch, yet.\r\n    var breaks = new Array<ExpressionRef>(1 + numCases);\r\n    breaks[0] = module.createSetLocal( // initializer\r\n      tempLocalIndex,\r\n      this.compileExpression(statement.condition, Type.u32, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n    );\r\n\r\n    // make one br_if per (possibly dynamic) labeled case (binaryen optimizes to br_table where possible)\r\n    var breakIndex = 1;\r\n    var defaultIndex = -1;\r\n    for (let i = 0; i < numCases; ++i) {\r\n      let case_ = cases[i];\r\n      let label = case_.label;\r\n      if (label) {\r\n        breaks[breakIndex++] = module.createBreak(\"case\" + i.toString(10) + \"|\" + context,\r\n          module.createBinary(BinaryOp.EqI32,\r\n            module.createGetLocal(tempLocalIndex, NativeType.I32),\r\n            this.compileExpression(label, Type.u32, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n          )\r\n        );\r\n      } else {\r\n        defaultIndex = i;\r\n      }\r\n    }\r\n\r\n    currentFunction.freeTempLocal(tempLocal);\r\n\r\n    // otherwise br to default respectively out of the switch if there is no default case\r\n    breaks[breakIndex] = module.createBreak((defaultIndex >= 0\r\n        ? \"case\" + defaultIndex.toString(10)\r\n        : \"break\"\r\n      ) + \"|\" + context);\r\n\r\n    // nest blocks in order\r\n    var currentBlock = module.createBlock(\"case0|\" + context, breaks, NativeType.None);\r\n    var alwaysReturns = true;\r\n    var alwaysReturnsWrapped = true;\r\n    var alwaysThrows = true;\r\n    var alwaysAllocates = true;\r\n    for (let i = 0; i < numCases; ++i) {\r\n      let case_ = cases[i];\r\n      let statements = case_.statements;\r\n      let numStatements = statements.length;\r\n\r\n      // Each switch case initiates a new branch\r\n      let flow = parentFlow.fork();\r\n      currentFunction.flow = flow;\r\n      let breakLabel = \"break|\" + context;\r\n      flow.breakLabel = breakLabel;\r\n\r\n      let isLast = i == numCases - 1;\r\n      let nextLabel = isLast ? breakLabel : \"case\" + (i + 1).toString(10) + \"|\" + context;\r\n      let stmts = new Array<ExpressionRef>(1 + numStatements);\r\n      stmts[0] = currentBlock;\r\n      let count = 1;\r\n      let terminated = false;\r\n      for (let j = 0; j < numStatements; ++j) {\r\n        let stmt = this.compileStatement(statements[j]);\r\n        if (getExpressionId(stmt) != ExpressionId.Nop) {\r\n          stmts[count++] = stmt;\r\n          if (flow.isAny(FlowFlags.ANY_TERMINATING)) {\r\n            terminated = true;\r\n            break;\r\n          }\r\n        }\r\n      }\r\n      stmts.length = count;\r\n      if (terminated || isLast) {\r\n        if (!flow.is(FlowFlags.RETURNS)) alwaysReturns = false;\r\n        if (!flow.is(FlowFlags.RETURNS_WRAPPED)) alwaysReturnsWrapped = false;\r\n        if (!flow.is(FlowFlags.THROWS)) alwaysThrows = false;\r\n        if (!flow.is(FlowFlags.ALLOCATES)) alwaysAllocates = false;\r\n      }\r\n\r\n      // Switch back to the parent flow\r\n      flow.unset(\r\n        FlowFlags.BREAKS |\r\n        FlowFlags.CONDITIONALLY_BREAKS\r\n      );\r\n      currentFunction.flow = flow.free();\r\n      currentBlock = module.createBlock(nextLabel, stmts, NativeType.None); // must be a labeled block\r\n    }\r\n    currentFunction.leaveBreakContext();\r\n\r\n    // If the switch has a default (guaranteed to handle any value), propagate common flags\r\n    if (defaultIndex >= 0) {\r\n      if (alwaysReturns) parentFlow.set(FlowFlags.RETURNS);\r\n      if (alwaysReturnsWrapped) parentFlow.set(FlowFlags.RETURNS_WRAPPED);\r\n      if (alwaysThrows) parentFlow.set(FlowFlags.THROWS);\r\n      if (alwaysAllocates) parentFlow.set(FlowFlags.ALLOCATES);\r\n    }\r\n    return currentBlock;\r\n  }\r\n\r\n  compileThrowStatement(statement: ThrowStatement): ExpressionRef {\r\n    var flow = this.currentFunction.flow;\r\n\r\n    // Remember that this branch throws\r\n    flow.set(FlowFlags.THROWS);\r\n\r\n    // FIXME: without try-catch it is safe to assume RETURNS as well for now\r\n    flow.set(FlowFlags.RETURNS);\r\n\r\n    // TODO: requires exception-handling spec.\r\n    return compileAbort(this, null, statement);\r\n  }\r\n\r\n  compileTryStatement(statement: TryStatement): ExpressionRef {\r\n    // TODO\r\n    // can't yet support something like: try { return ... } finally { ... }\r\n    // worthwhile to investigate lowering returns to block results (here)?\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      statement.range\r\n    );\r\n    return this.module.createUnreachable();\r\n  }\r\n\r\n  /**\r\n   * Compiles a variable statement. Returns `0` if an initializer is not\r\n   * necessary.\r\n   */\r\n  compileVariableStatement(statement: VariableStatement, isKnownGlobal: bool = false): ExpressionRef {\r\n    var program = this.program;\r\n    var currentFunction = this.currentFunction;\r\n    var declarations = statement.declarations;\r\n    var numDeclarations = declarations.length;\r\n\r\n    // top-level variables and constants become globals\r\n    if (isKnownGlobal || (\r\n      currentFunction == this.startFunctionInstance &&\r\n      statement.parent && statement.parent.kind == NodeKind.SOURCE\r\n    )) {\r\n      // NOTE that the above condition also covers top-level variables declared with 'let', even\r\n      // though such variables could also become start function locals if, and only if, not used\r\n      // within any function declared in the same source, which is unknown at this point. the only\r\n      // efficient way to deal with this would be to keep track of all occasions it is used and\r\n      // replace these instructions afterwards, dynamically. (TOOD: what about a Binaryen pass?)\r\n      for (let i = 0; i < numDeclarations; ++i) {\r\n        this.compileGlobalDeclaration(declarations[i]);\r\n      }\r\n      return 0;\r\n    }\r\n\r\n    // other variables become locals\r\n    var initializers = new Array<ExpressionRef>();\r\n    var flow = this.currentFunction.flow;\r\n    var resolver = this.resolver;\r\n    for (let i = 0; i < numDeclarations; ++i) {\r\n      let declaration = declarations[i];\r\n      let name = declaration.name.text;\r\n      let type: Type | null = null;\r\n      let initExpr: ExpressionRef = 0;\r\n      if (declaration.type) {\r\n        type = resolver.resolveType( // reports\r\n          declaration.type,\r\n          flow.contextualTypeArguments\r\n        );\r\n        if (!type) continue;\r\n        if (declaration.initializer) {\r\n          initExpr = this.compileExpression( // reports\r\n            declaration.initializer,\r\n            type,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n        }\r\n      } else if (declaration.initializer) { // infer type using void/NONE for proper literal inference\r\n        initExpr = this.compileExpressionRetainType( // reports\r\n          declaration.initializer,\r\n          Type.void,\r\n          WrapMode.NONE\r\n        );\r\n        if (this.currentType == Type.void) {\r\n          this.error(\r\n            DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n            declaration.range, this.currentType.toString(), \"<auto>\"\r\n          );\r\n          continue;\r\n        }\r\n        type = this.currentType;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Type_expected,\r\n          declaration.name.range.atEnd\r\n        );\r\n        continue;\r\n      }\r\n      let isInlined = false;\r\n      if (declaration.is(CommonFlags.CONST)) {\r\n        if (initExpr) {\r\n          initExpr = this.module.precomputeExpression(initExpr);\r\n          if (getExpressionId(initExpr) == ExpressionId.Const) {\r\n            let local = new Local(program, name, -1, type);\r\n            switch (getExpressionType(initExpr)) {\r\n              case NativeType.I32: {\r\n                local = local.withConstantIntegerValue(\r\n                  i64_new(\r\n                    getConstValueI32(initExpr),\r\n                    0\r\n                  )\r\n                );\r\n                break;\r\n              }\r\n              case NativeType.I64: {\r\n                local = local.withConstantIntegerValue(\r\n                  i64_new(\r\n                    getConstValueI64Low(initExpr),\r\n                    getConstValueI64High(initExpr)\r\n                  )\r\n                );\r\n                break;\r\n              }\r\n              case NativeType.F32: {\r\n                local = local.withConstantFloatValue(<f64>getConstValueF32(initExpr));\r\n                break;\r\n              }\r\n              case NativeType.F64: {\r\n                local = local.withConstantFloatValue(getConstValueF64(initExpr));\r\n                break;\r\n              }\r\n              default: {\r\n                assert(false);\r\n                return this.module.createUnreachable();\r\n              }\r\n            }\r\n            // Create a virtual local that doesn't actually exist in WebAssembly\r\n            let scopedLocals = currentFunction.flow.scopedLocals;\r\n            if (!scopedLocals) currentFunction.flow.scopedLocals = scopedLocals = new Map();\r\n            else if (scopedLocals.has(name)) {\r\n              this.error(\r\n                DiagnosticCode.Duplicate_identifier_0,\r\n                declaration.name.range, name\r\n              );\r\n              return this.module.createUnreachable();\r\n            }\r\n            scopedLocals.set(name, local);\r\n            isInlined = true;\r\n          } else {\r\n            this.warning(\r\n              DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n              declaration.range\r\n            );\r\n          }\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._const_declarations_must_be_initialized,\r\n            declaration.range\r\n          );\r\n        }\r\n      }\r\n      if (!isInlined) {\r\n        let local: Local;\r\n        if (\r\n          declaration.isAny(CommonFlags.LET | CommonFlags.CONST) ||\r\n          flow.is(FlowFlags.INLINE_CONTEXT)\r\n        ) { // here: not top-level\r\n          local = flow.addScopedLocal(type, name, false, declaration); // reports\r\n        } else {\r\n          local = currentFunction.addLocal(type, name, declaration); // reports\r\n        }\r\n        if (initExpr) {\r\n          initializers.push(this.compileAssignmentWithValue(declaration.name, initExpr));\r\n          if (local.type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n            flow.setLocalWrapped(local.index, !flow.canOverflow(initExpr, type));\r\n          }\r\n        } else if (local.type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n          flow.setLocalWrapped(local.index, true); // zero\r\n        }\r\n      }\r\n    }\r\n    return initializers.length   // we can unwrap these here because the\r\n      ? initializers.length == 1 // source didn't tell us exactly what to do\r\n        ? initializers[0]\r\n        : this.module.createBlock(null, initializers, NativeType.None)\r\n      : 0;\r\n  }\r\n\r\n  compileVoidStatement(statement: VoidStatement): ExpressionRef {\r\n    return this.compileExpression(statement.expression, Type.void, ConversionKind.EXPLICIT, WrapMode.NONE);\r\n  }\r\n\r\n  compileWhileStatement(statement: WhileStatement): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    // The condition does not yet initialize a branch\r\n    var condExpr = this.makeIsTrueish(\r\n      this.compileExpressionRetainType(statement.condition, Type.bool, WrapMode.NONE),\r\n      this.currentType\r\n    );\r\n\r\n    if (\r\n      !this.options.noTreeShaking ||\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT)\r\n    ) {\r\n      // Try to eliminate unnecesssary loops if the condition is constant\r\n      let condExprPrecomp = module.precomputeExpression(condExpr);\r\n      if (\r\n        getExpressionId(condExprPrecomp) == ExpressionId.Const &&\r\n        getExpressionType(condExprPrecomp) == NativeType.I32\r\n      ) {\r\n        if (!getConstValueI32(condExprPrecomp)) return module.createNop();\r\n\r\n      // Otherwise recompile to the original and let the optimizer decide\r\n      } else /* if (condExpr != condExprPrecomp) <- not guaranteed */ {\r\n        condExpr = this.makeIsTrueish(\r\n          this.compileExpressionRetainType(statement.condition, Type.bool, WrapMode.NONE),\r\n          this.currentType\r\n        );\r\n      }\r\n    }\r\n\r\n    // Statements initiate a new branch with its own break context\r\n    var currentFunction = this.currentFunction;\r\n    var label = currentFunction.enterBreakContext();\r\n    var parentFlow = currentFunction.flow;\r\n    var flow = parentFlow.fork();\r\n    currentFunction.flow = flow;\r\n    var breakLabel = \"break|\" + label;\r\n    flow.breakLabel = breakLabel;\r\n    var continueLabel = \"continue|\" + label;\r\n    flow.continueLabel = continueLabel;\r\n\r\n    var body = this.compileStatement(statement.statement);\r\n    var alwaysTrue = false; // TODO\r\n    var terminated = flow.isAny(FlowFlags.ANY_TERMINATING);\r\n\r\n    // Switch back to the parent flow\r\n    currentFunction.flow = flow.free();\r\n    currentFunction.leaveBreakContext();\r\n    flow.unset(\r\n      FlowFlags.BREAKS |\r\n      FlowFlags.CONDITIONALLY_BREAKS |\r\n      FlowFlags.CONTINUES |\r\n      FlowFlags.CONDITIONALLY_CONTINUES\r\n    );\r\n    if (alwaysTrue) parentFlow.inherit(flow);\r\n    else parentFlow.inheritConditional(flow);\r\n\r\n    return module.createBlock(breakLabel, [\r\n      module.createLoop(continueLabel,\r\n        module.createIf(condExpr,\r\n          terminated\r\n            ? body // skip trailing continue if unnecessary\r\n            : module.createBlock(null, [\r\n                body,\r\n                module.createBreak(continueLabel)\r\n              ], NativeType.None)\r\n        )\r\n      )\r\n    ]);\r\n  }\r\n\r\n  // expressions\r\n\r\n  /**\r\n   * Compiles the value of an inlined constant element.\r\n   * @param retainType If true, the annotated type of the constant is retained. Otherwise, the value\r\n   *  is precomputed according to context.\r\n   */\r\n  compileInlineConstant(\r\n    element: VariableLikeElement,\r\n    contextualType: Type,\r\n    retainType: bool\r\n  ): ExpressionRef {\r\n    assert(element.is(CommonFlags.INLINED));\r\n    var type = element.type;\r\n    switch (\r\n      !retainType &&\r\n      type.is(TypeFlags.INTEGER) &&\r\n      contextualType.is(TypeFlags.INTEGER) &&\r\n      type.size < contextualType.size\r\n        ? (this.currentType = contextualType).kind // essentially precomputes a (sign-)extension\r\n        : (this.currentType = type).kind\r\n    ) {\r\n      case TypeKind.I8:\r\n      case TypeKind.I16: {\r\n        let shift = type.computeSmallIntegerShift(Type.i32);\r\n        return this.module.createI32(\r\n          element.constantValueKind == ConstantValueKind.INTEGER\r\n            ? i64_low(element.constantIntegerValue) << shift >> shift\r\n            : 0\r\n        ); // recognized by canOverflow\r\n      }\r\n      case TypeKind.U8:\r\n      case TypeKind.U16:\r\n      case TypeKind.BOOL: {\r\n        let mask = element.type.computeSmallIntegerMask(Type.i32);\r\n        return this.module.createI32(\r\n          element.constantValueKind == ConstantValueKind.INTEGER\r\n            ? i64_low(element.constantIntegerValue) & mask\r\n            : 0\r\n        ); // recognized by canOverflow\r\n      }\r\n      case TypeKind.I32:\r\n      case TypeKind.U32: {\r\n        return this.module.createI32(\r\n          element.constantValueKind == ConstantValueKind.INTEGER\r\n            ? i64_low(element.constantIntegerValue)\r\n            : 0\r\n        );\r\n      }\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: {\r\n        if (!element.program.options.isWasm64) {\r\n          return this.module.createI32(\r\n            element.constantValueKind == ConstantValueKind.INTEGER\r\n              ? i64_low(element.constantIntegerValue)\r\n              : 0\r\n          );\r\n        }\r\n        // fall-through\r\n      }\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: {\r\n        return element.constantValueKind == ConstantValueKind.INTEGER\r\n          ? this.module.createI64(\r\n              i64_low(element.constantIntegerValue),\r\n              i64_high(element.constantIntegerValue)\r\n            )\r\n          : this.module.createI64(0);\r\n      }\r\n      case TypeKind.F64: {\r\n        // monkey-patch for converting built-in floats to f32 implicitly\r\n        if (!(element.hasDecorator(DecoratorFlags.BUILTIN) && contextualType == Type.f32)) {\r\n          return this.module.createF64((<VariableLikeElement>element).constantFloatValue);\r\n        }\r\n        // otherwise fall-through: basically precomputes f32.demote/f64 of NaN / Infinity\r\n        this.currentType = Type.f32;\r\n      }\r\n      case TypeKind.F32: {\r\n        return this.module.createF32((<VariableLikeElement>element).constantFloatValue);\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return this.module.createUnreachable();\r\n      }\r\n    }\r\n  }\r\n\r\n  compileExpression(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    conversionKind: ConversionKind,\r\n    wrapMode: WrapMode\r\n  ): ExpressionRef {\r\n    this.currentType = contextualType;\r\n\r\n    var expr: ExpressionRef;\r\n    switch (expression.kind) {\r\n      case NodeKind.ASSERTION: {\r\n        expr = this.compileAssertionExpression(<AssertionExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.BINARY: {\r\n        expr = this.compileBinaryExpression(<BinaryExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.CALL: {\r\n        expr = this.compileCallExpression(<CallExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.COMMA: {\r\n        expr = this.compileCommaExpression(<CommaExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.ELEMENTACCESS: {\r\n        expr = this.compileElementAccessExpression(<ElementAccessExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.FUNCTION: {\r\n        expr = this.compileFunctionExpression(<FunctionExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.IDENTIFIER:\r\n      case NodeKind.FALSE:\r\n      case NodeKind.NULL:\r\n      case NodeKind.THIS:\r\n      case NodeKind.SUPER:\r\n      case NodeKind.TRUE: {\r\n        expr = this.compileIdentifierExpression(\r\n          <IdentifierExpression>expression,\r\n          contextualType,\r\n          conversionKind == ConversionKind.NONE // retain type of inlined constants\r\n        );\r\n        break;\r\n      }\r\n      case NodeKind.INSTANCEOF: {\r\n        expr = this.compileInstanceOfExpression(<InstanceOfExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.LITERAL: {\r\n        expr = this.compileLiteralExpression(<LiteralExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.NEW: {\r\n        expr = this.compileNewExpression(<NewExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.PARENTHESIZED: {\r\n        expr = this.compileParenthesizedExpression(<ParenthesizedExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.PROPERTYACCESS: {\r\n        expr = this.compilePropertyAccessExpression(\r\n          <PropertyAccessExpression>expression,\r\n          contextualType,\r\n          conversionKind == ConversionKind.NONE // retain type of inlined constants\r\n        );\r\n        break;\r\n      }\r\n      case NodeKind.TERNARY: {\r\n        expr = this.compileTernaryExpression(<TernaryExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.UNARYPOSTFIX: {\r\n        expr = this.compileUnaryPostfixExpression(<UnaryPostfixExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.UNARYPREFIX: {\r\n        expr = this.compileUnaryPrefixExpression(<UnaryPrefixExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      default: {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        expr = this.module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    var currentType = this.currentType;\r\n    if (conversionKind != ConversionKind.NONE && currentType != contextualType) {\r\n      expr = this.convertExpression(expr, currentType, contextualType, conversionKind, wrapMode, expression);\r\n      this.currentType = contextualType;\r\n    } else if (wrapMode == WrapMode.WRAP) {\r\n      expr = this.ensureSmallIntegerWrap(expr, currentType);\r\n    }\r\n\r\n    if (this.options.sourceMap) this.addDebugLocation(expr, expression.range);\r\n    return expr;\r\n  }\r\n\r\n  compileExpressionRetainType(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    wrapMode: WrapMode\r\n  ): ExpressionRef {\r\n    return this.compileExpression(\r\n      expression,\r\n      contextualType == Type.void\r\n        ? Type.i32\r\n        : contextualType,\r\n      ConversionKind.NONE,\r\n      wrapMode\r\n    );\r\n  }\r\n\r\n  precomputeExpression(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    conversionKind: ConversionKind,\r\n    wrapMode: WrapMode\r\n  ): ExpressionRef {\r\n    return this.module.precomputeExpression(\r\n      this.compileExpression(expression, contextualType, conversionKind, wrapMode)\r\n    );\r\n  }\r\n\r\n  convertExpression(\r\n    expr: ExpressionRef,\r\n    fromType: Type,\r\n    toType: Type,\r\n    conversionKind: ConversionKind,\r\n    wrapMode: WrapMode,\r\n    reportNode: Node\r\n  ): ExpressionRef {\r\n    assert(conversionKind != ConversionKind.NONE);\r\n    var module = this.module;\r\n\r\n    // void to any\r\n    if (fromType.kind == TypeKind.VOID) {\r\n      assert(toType.kind != TypeKind.VOID); // convertExpression should not be called with void -> void\r\n      this.error(\r\n        DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n        reportNode.range, fromType.toString(), toType.toString()\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n\r\n    // any to void\r\n    if (toType.kind == TypeKind.VOID) return module.createDrop(expr);\r\n\r\n    if (!fromType.isAssignableTo(toType)) {\r\n      if (conversionKind == ConversionKind.IMPLICIT) {\r\n        this.error(\r\n          DiagnosticCode.Conversion_from_type_0_to_1_requires_an_explicit_cast,\r\n          reportNode.range, fromType.toString(), toType.toString()\r\n        ); // recoverable\r\n      }\r\n    }\r\n\r\n    if (fromType.is(TypeFlags.FLOAT)) {\r\n\r\n      // float to float\r\n      if (toType.is(TypeFlags.FLOAT)) {\r\n        if (fromType.kind == TypeKind.F32) {\r\n\r\n          // f32 to f64\r\n          if (toType.kind == TypeKind.F64) {\r\n            expr = module.createUnary(UnaryOp.PromoteF32, expr);\r\n          }\r\n\r\n          // otherwise f32 to f32\r\n\r\n        // f64 to f32\r\n        } else if (toType.kind == TypeKind.F32) {\r\n          expr = module.createUnary(UnaryOp.DemoteF64, expr);\r\n        }\r\n\r\n        // otherwise f64 to f64\r\n\r\n      // float to int\r\n      } else if (toType.is(TypeFlags.INTEGER)) {\r\n\r\n        // f32 to int\r\n        if (fromType.kind == TypeKind.F32) {\r\n          if (toType.is(TypeFlags.SIGNED)) {\r\n            if (toType.is(TypeFlags.LONG)) {\r\n              expr = module.createUnary(UnaryOp.TruncF32ToI64, expr);\r\n            } else {\r\n              expr = module.createUnary(UnaryOp.TruncF32ToI32, expr);\r\n            }\r\n          } else {\r\n            if (toType.is(TypeFlags.LONG)) {\r\n              expr = module.createUnary(UnaryOp.TruncF32ToU64, expr);\r\n            } else {\r\n              expr = module.createUnary(UnaryOp.TruncF32ToU32, expr);\r\n            }\r\n          }\r\n\r\n        // f64 to int\r\n        } else {\r\n          if (toType.is(TypeFlags.SIGNED)) {\r\n            if (toType.is(TypeFlags.LONG)) {\r\n              expr = module.createUnary(UnaryOp.TruncF64ToI64, expr);\r\n            } else {\r\n              expr = module.createUnary(UnaryOp.TruncF64ToI32, expr);\r\n            }\r\n          } else {\r\n            if (toType.is(TypeFlags.LONG)) {\r\n              expr = module.createUnary(UnaryOp.TruncF64ToU64, expr);\r\n            } else {\r\n              expr = module.createUnary(UnaryOp.TruncF64ToU32, expr);\r\n            }\r\n          }\r\n        }\r\n\r\n      // float to void\r\n      } else {\r\n        assert(toType.flags == TypeFlags.NONE, \"void type expected\");\r\n        expr = module.createDrop(expr);\r\n      }\r\n\r\n    // int to float\r\n    } else if (fromType.is(TypeFlags.INTEGER) && toType.is(TypeFlags.FLOAT)) {\r\n\r\n      // int to f32\r\n      if (toType.kind == TypeKind.F32) {\r\n        if (fromType.is(TypeFlags.LONG)) {\r\n          expr = module.createUnary(\r\n            fromType.is(TypeFlags.SIGNED)\r\n              ? UnaryOp.ConvertI64ToF32\r\n              : UnaryOp.ConvertU64ToF32,\r\n            expr\r\n          );\r\n        } else {\r\n          expr = module.createUnary(\r\n            fromType.is(TypeFlags.SIGNED)\r\n              ? UnaryOp.ConvertI32ToF32\r\n              : UnaryOp.ConvertU32ToF32,\r\n            expr\r\n          );\r\n        }\r\n\r\n      // int to f64\r\n      } else {\r\n        if (fromType.is(TypeFlags.LONG)) {\r\n          expr = module.createUnary(\r\n            fromType.is(TypeFlags.SIGNED)\r\n              ? UnaryOp.ConvertI64ToF64\r\n              : UnaryOp.ConvertU64ToF64,\r\n            expr\r\n          );\r\n        } else {\r\n          expr = module.createUnary(\r\n            fromType.is(TypeFlags.SIGNED)\r\n              ? UnaryOp.ConvertI32ToF64\r\n              : UnaryOp.ConvertU32ToF64,\r\n            expr\r\n          );\r\n        }\r\n      }\r\n\r\n    // int to int\r\n    } else {\r\n      // i64 to ...\r\n      if (fromType.is(TypeFlags.LONG)) {\r\n\r\n        // i64 to i32 or smaller\r\n        if (!toType.is(TypeFlags.LONG)) {\r\n          expr = module.createUnary(UnaryOp.WrapI64, expr); // discards upper bits\r\n        }\r\n\r\n      // i32 or smaller to i64\r\n      } else if (toType.is(TypeFlags.LONG)) {\r\n        expr = module.createUnary(\r\n          toType.is(TypeFlags.SIGNED) ? UnaryOp.ExtendI32 : UnaryOp.ExtendU32,\r\n          this.ensureSmallIntegerWrap(expr, fromType) // must clear garbage bits\r\n        );\r\n        wrapMode = WrapMode.NONE;\r\n\r\n      // i32 to i32\r\n      } else {\r\n        // small i32 to ...\r\n        if (fromType.is(TypeFlags.SHORT)) {\r\n          // small i32 to larger i32\r\n          if (fromType.size < toType.size) {\r\n            expr = this.ensureSmallIntegerWrap(expr, fromType); // must clear garbage bits\r\n            wrapMode = WrapMode.NONE;\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    this.currentType = toType;\r\n    return wrapMode == WrapMode.WRAP\r\n      ? this.ensureSmallIntegerWrap(expr, toType)\r\n      : expr;\r\n  }\r\n\r\n  compileAssertionExpression(expression: AssertionExpression, contextualType: Type): ExpressionRef {\r\n    var toType = this.resolver.resolveType( // reports\r\n      expression.toType,\r\n      this.currentFunction.flow.contextualTypeArguments\r\n    );\r\n    if (!toType) return this.module.createUnreachable();\r\n    return this.compileExpression(expression.expression, toType, ConversionKind.EXPLICIT, WrapMode.NONE);\r\n  }\r\n\r\n  private f32ModInstance: Function | null = null;\r\n  private f64ModInstance: Function | null = null;\r\n  private f32PowInstance: Function | null = null;\r\n  private f64PowInstance: Function | null = null;\r\n\r\n  compileBinaryExpression(\r\n    expression: BinaryExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var left = expression.left;\r\n    var right = expression.right;\r\n\r\n    var leftExpr: ExpressionRef;\r\n    var leftType: Type;\r\n    var rightExpr: ExpressionRef;\r\n    var rightType: Type;\r\n    var commonType: Type | null;\r\n\r\n    var expr: ExpressionRef;\r\n    var compound = false;\r\n\r\n    var operator = expression.operator;\r\n    switch (operator) {\r\n      case Token.LESSTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.LT);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, \"<\", leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.LtI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.LtI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.LtI64\r\n                : BinaryOp.LtI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.LtU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.LtU64\r\n                : BinaryOp.LtU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.LtU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.LtF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.LtF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.GREATERTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.GT);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, \">\", leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.GtI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.GtI64\r\n                : BinaryOp.GtI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.GtI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.GtU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.GtU64\r\n                : BinaryOp.GtU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.GtU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.GtF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.GtF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.LESSTHAN_EQUALS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.LE);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, \"<=\", leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.LeI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.LeI64\r\n                : BinaryOp.LeI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.LeI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.LeU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.LeU64\r\n                : BinaryOp.LeU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.LeU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.LeF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.LeF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.GREATERTHAN_EQUALS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.GE);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, \">=\", leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.GeI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.GeI64\r\n                : BinaryOp.GeI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.GeI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.GeU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.GeU64\r\n                : BinaryOp.GeU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.GeU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.GeF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.GeF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n\r\n      case Token.EQUALS_EQUALS_EQUALS:\r\n      case Token.EQUALS_EQUALS: {\r\n\r\n        // NOTE that this favors correctness, in terms of emitting a binary expression, over\r\n        // checking for a possible use of unary EQZ. while the most classic of all optimizations,\r\n        // that's not what the source told us to do. for reference, `!left` emits unary EQZ.\r\n\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n         // check operator overload\r\n        if (operator == Token.EQUALS_EQUALS && this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.EQ);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          // still allow '==' with references\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, operatorTokenToString(expression.operator), leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.EqI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.EqI64\r\n                : BinaryOp.EqI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.EqI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.EqF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.EqF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.EXCLAMATION_EQUALS_EQUALS:\r\n      case Token.EXCLAMATION_EQUALS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n         // check operator overload\r\n        if (operator == Token.EXCLAMATION_EQUALS && this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.NE);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          // still allow '!=' with references\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, operatorTokenToString(expression.operator), leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.NeI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.NeI64\r\n                : BinaryOp.NeI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.NeI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.NeF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.NeF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.EQUALS: {\r\n        return this.compileAssignment(left, right, contextualType);\r\n      }\r\n      case Token.PLUS_EQUALS: compound = true;\r\n      case Token.PLUS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.ADD);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"+\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:   // addition might overflow\r\n          case TypeKind.I16:  // ^\r\n          case TypeKind.U8:   // ^\r\n          case TypeKind.U16:  // ^\r\n          case TypeKind.BOOL: // ^\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.AddI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.AddI64\r\n                : BinaryOp.AddI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.AddI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.AddF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.AddF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.MINUS_EQUALS: compound = true;\r\n      case Token.MINUS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.SUB);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"-\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:   // subtraction might overflow\r\n          case TypeKind.I16:  // ^\r\n          case TypeKind.U8:   // ^\r\n          case TypeKind.U16:  // ^\r\n          case TypeKind.BOOL: // ^\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.SubI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.SubI64\r\n                : BinaryOp.SubI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.SubI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.SubF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.SubF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.ASTERISK_EQUALS: compound = true;\r\n      case Token.ASTERISK: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.MUL);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType);\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"*\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL:\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.MulI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.MulI64\r\n                : BinaryOp.MulI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.MulI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.MulF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.MulF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.ASTERISK_ASTERISK_EQUALS: compound = true;\r\n      case Token.ASTERISK_ASTERISK: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.POW);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        let instance: Function | null;\r\n\r\n        // Mathf.pow if lhs is f32 (result is f32)\r\n        if (this.currentType.kind == TypeKind.F32) {\r\n          rightExpr = this.compileExpression(right, Type.f32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (!(instance = this.f32PowInstance)) {\r\n            let namespace = this.program.elementsLookup.get(\"Mathf\");\r\n            if (!namespace) {\r\n              this.error(\r\n                DiagnosticCode.Cannot_find_name_0,\r\n                expression.range, \"Mathf\"\r\n              );\r\n              expr = module.createUnreachable();\r\n              break;\r\n            }\r\n            let prototype = namespace.members ? namespace.members.get(\"pow\") : null;\r\n            if (!prototype) {\r\n              this.error(\r\n                DiagnosticCode.Cannot_find_name_0,\r\n                expression.range, \"Mathf.pow\"\r\n              );\r\n              expr = module.createUnreachable();\r\n              break;\r\n            }\r\n            assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n            this.f32PowInstance = instance = this.resolver.resolveFunction(<FunctionPrototype>prototype, null);\r\n          }\r\n\r\n        // Math.pow otherwise (result is f64)\r\n        // TODO: should the result be converted back?\r\n        } else {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            this.currentType,\r\n            Type.f64,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE,\r\n            left\r\n          );\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            Type.f64,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n          rightType = this.currentType;\r\n          if (!(instance = this.f64PowInstance)) {\r\n            let namespace = this.program.elementsLookup.get(\"Math\");\r\n            if (!namespace) {\r\n              this.error(\r\n                DiagnosticCode.Cannot_find_name_0,\r\n                expression.range, \"Math\"\r\n              );\r\n              expr = module.createUnreachable();\r\n              break;\r\n            }\r\n            let prototype = namespace.members ? namespace.members.get(\"pow\") : null;\r\n            if (!prototype) {\r\n              this.error(\r\n                DiagnosticCode.Cannot_find_name_0,\r\n                expression.range, \"Math.pow\"\r\n              );\r\n              expr = module.createUnreachable();\r\n              break;\r\n            }\r\n            assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n            this.f64PowInstance = instance = this.resolver.resolveFunction(<FunctionPrototype>prototype, null);\r\n          }\r\n        }\r\n        if (!(instance && this.compileFunction(instance))) {\r\n          expr = module.createUnreachable();\r\n        } else {\r\n          expr = this.makeCallDirect(instance, [ leftExpr, rightExpr ]);\r\n        }\r\n        break;\r\n      }\r\n      case Token.SLASH_EQUALS: compound = true;\r\n      case Token.SLASH: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.DIV);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType);\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.WRAP, // !\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.WRAP, // !\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"/\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:  // signed div on signed small integers might overflow, e.g. -128/-1\r\n          case TypeKind.I16: // ^\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.DivI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.DivI64\r\n                : BinaryOp.DivI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.DivI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.DivU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.DivU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.DivU64\r\n                : BinaryOp.DivU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.DivU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.DivF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.DivF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.PERCENT_EQUALS: compound = true;\r\n      case Token.PERCENT: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.REM);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType);\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.WRAP, // !\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.WRAP, // !\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"%\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16: {\r\n            expr = module.createBinary(BinaryOp.RemI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.RemI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.RemI64\r\n                : BinaryOp.RemI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.RemI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.RemU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.RemU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.RemU64\r\n                : BinaryOp.RemU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.RemU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            let instance = this.f32ModInstance;\r\n            if (!instance) {\r\n              let namespace = this.program.elementsLookup.get(\"Mathf\");\r\n              if (!namespace) {\r\n                this.error(\r\n                  DiagnosticCode.Cannot_find_name_0,\r\n                  expression.range, \"Mathf\"\r\n                );\r\n                expr = module.createUnreachable();\r\n                break;\r\n              }\r\n              let prototype = namespace.members ? namespace.members.get(\"mod\") : null;\r\n              if (!prototype) {\r\n                this.error(\r\n                  DiagnosticCode.Cannot_find_name_0,\r\n                  expression.range, \"Mathf.mod\"\r\n                );\r\n                expr = module.createUnreachable();\r\n                break;\r\n              }\r\n              assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n              this.f32ModInstance = instance = this.resolver.resolveFunction(<FunctionPrototype>prototype, null);\r\n            }\r\n            if (!(instance && this.compileFunction(instance))) {\r\n              expr = module.createUnreachable();\r\n            } else {\r\n              expr = this.makeCallDirect(instance, [ leftExpr, rightExpr ]);\r\n            }\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            let instance = this.f64ModInstance;\r\n            if (!instance) {\r\n              let namespace = this.program.elementsLookup.get(\"Math\");\r\n              if (!namespace) {\r\n                this.error(\r\n                  DiagnosticCode.Cannot_find_name_0,\r\n                  expression.range, \"Math\"\r\n                );\r\n                expr = module.createUnreachable();\r\n                break;\r\n              }\r\n              let prototype = namespace.members ? namespace.members.get(\"mod\") : null;\r\n              if (!prototype) {\r\n                this.error(\r\n                  DiagnosticCode.Cannot_find_name_0,\r\n                  expression.range, \"Math.mod\"\r\n                );\r\n                expr = module.createUnreachable();\r\n                break;\r\n              }\r\n              assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n              this.f64ModInstance = instance = this.resolver.resolveFunction(<FunctionPrototype>prototype, null);\r\n            }\r\n            if (!(instance && this.compileFunction(instance))) {\r\n              expr = module.createUnreachable();\r\n            } else {\r\n              expr = this.makeCallDirect(instance, [ leftExpr, rightExpr ]);\r\n            }\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.LESSTHAN_LESSTHAN_EQUALS: compound = true;\r\n      case Token.LESSTHAN_LESSTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_SHL);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL:\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.ShlI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.ShlI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.ShlI64\r\n                : BinaryOp.ShlI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.GREATERTHAN_GREATERTHAN_EQUALS: compound = true;\r\n      case Token.GREATERTHAN_GREATERTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_SHR);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType); // must clear garbage bits\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n        rightType = this.currentType;\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16: {\r\n            expr = module.createBinary(BinaryOp.ShrI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.ShrI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.ShrI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.ShrI64\r\n                : BinaryOp.ShrI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.ShrU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.ShrU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.ShrU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.ShrU64\r\n                : BinaryOp.ShrU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS: compound = true;\r\n      case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_SHR_U);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType); // must clear garbage bits\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: { // assumes that unsigned shr on unsigned small integers does not overflow\r\n            expr = module.createBinary(BinaryOp.ShrU32, leftExpr, rightExpr);\r\n          }\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.ShrU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.ShrU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.ShrU64\r\n                : BinaryOp.ShrU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.AMPERSAND_EQUALS: compound = true;\r\n      case Token.AMPERSAND: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overloadd\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_AND);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"&\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.AndI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.AndI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.AndI64\r\n                : BinaryOp.AndI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.BAR_EQUALS: compound = true;\r\n      case Token.BAR: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_OR);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"|\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.OrI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.OrI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.OrI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.OrI64\r\n                : BinaryOp.OrI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.CARET_EQUALS: compound = true;\r\n      case Token.CARET: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_XOR);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"^\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.XorI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.XorI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.XorI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.XorI64\r\n                : BinaryOp.XorI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n\r\n      // logical (no overloading)\r\n\r\n      case Token.AMPERSAND_AMPERSAND: { // left && right\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n\r\n        // simplify if cloning left without side effects is possible\r\n        if (expr = module.cloneExpression(leftExpr, true, 0)) {\r\n          this.makeIsTrueish(leftExpr, this.currentType);\r\n          expr = module.createIf(\r\n            this.makeIsTrueish(leftExpr, this.currentType),\r\n            rightExpr,\r\n            expr\r\n          );\r\n\r\n        // if not possible, tee left to a temp. local\r\n        } else {\r\n          let flow = this.currentFunction.flow;\r\n          let tempLocal = this.currentFunction.getAndFreeTempLocal(\r\n            this.currentType,\r\n            !flow.canOverflow(leftExpr, this.currentType)\r\n          );\r\n          expr = module.createIf(\r\n            this.makeIsTrueish(\r\n              module.createTeeLocal(tempLocal.index, leftExpr),\r\n              this.currentType\r\n            ),\r\n            rightExpr,\r\n            module.createGetLocal(\r\n              assert(tempLocal).index, // to be sure\r\n              this.currentType.toNativeType()\r\n            )\r\n          );\r\n        }\r\n        break;\r\n      }\r\n      case Token.BAR_BAR: { // left || right\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n\r\n        // simplify if cloning left without side effects is possible\r\n        if (expr = this.module.cloneExpression(leftExpr, true, 0)) {\r\n          expr = this.module.createIf(\r\n            this.makeIsTrueish(leftExpr, this.currentType),\r\n            expr,\r\n            rightExpr\r\n          );\r\n\r\n        // if not possible, tee left to a temp. local\r\n        } else {\r\n          let flow = this.currentFunction.flow;\r\n          let tempLocal = this.currentFunction.getAndFreeTempLocal(\r\n            this.currentType,\r\n            !flow.canOverflow(leftExpr, this.currentType)\r\n          );\r\n          expr = module.createIf(\r\n            this.makeIsTrueish(\r\n              module.createTeeLocal(tempLocal.index, leftExpr),\r\n              this.currentType\r\n            ),\r\n            module.createGetLocal(\r\n              assert(tempLocal).index, // to be sure\r\n              this.currentType.toNativeType()\r\n            ),\r\n            rightExpr\r\n          );\r\n        }\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        expr = this.module.createUnreachable();\r\n      }\r\n    }\r\n    return compound\r\n      ? this.compileAssignmentWithValue(left, expr, contextualType != Type.void)\r\n      : expr;\r\n  }\r\n\r\n  compileUnaryOverload(\r\n    operatorInstance: Function,\r\n    value: Expression,\r\n    valueExpr: ExpressionRef,\r\n    reportNode: Node\r\n  ): ExpressionRef {\r\n    var argumentExpressions: Expression[];\r\n    var thisArg: ExpressionRef = 0;\r\n    if (operatorInstance.is(CommonFlags.INSTANCE)) {\r\n      thisArg = valueExpr;  // can reuse the previously evaluated expr as the this value here\r\n      argumentExpressions = [];\r\n    } else {\r\n      argumentExpressions = [ value ]; // annotated type might differ -> recompile\r\n    }\r\n    return this.compileCallDirect(\r\n      operatorInstance,\r\n      argumentExpressions,\r\n      reportNode,\r\n      thisArg,\r\n      operatorInstance.hasDecorator(DecoratorFlags.INLINE)\r\n    );\r\n  }\r\n\r\n  compileBinaryOverload(\r\n    operatorInstance: Function,\r\n    left: Expression,\r\n    leftExpr: ExpressionRef,\r\n    right: Expression,\r\n    reportNode: Node\r\n  ): ExpressionRef {\r\n    var argumentExpressions: Expression[];\r\n    var thisArg: ExpressionRef = 0;\r\n    if (operatorInstance.is(CommonFlags.INSTANCE)) {\r\n      let parent = assert(operatorInstance.parent);\r\n      assert(parent.kind == ElementKind.CLASS);\r\n      thisArg = leftExpr; // can reuse the previously evaluated leftExpr as the this value here\r\n      argumentExpressions = [ right ];\r\n    } else {\r\n      argumentExpressions = [ left, right ]; // annotated type of LHS might differ -> recompile\r\n    }\r\n    var ret = this.compileCallDirect(\r\n      operatorInstance,\r\n      argumentExpressions,\r\n      reportNode,\r\n      thisArg,\r\n      operatorInstance.hasDecorator(DecoratorFlags.INLINE)\r\n    );\r\n    return ret;\r\n  }\r\n\r\n  compileAssignment(expression: Expression, valueExpression: Expression, contextualType: Type): ExpressionRef {\r\n    var program = this.program;\r\n    var resolver = program.resolver;\r\n    var currentFunction = this.currentFunction;\r\n    var target = resolver.resolveExpression(expression, currentFunction); // reports\r\n    if (!target) return this.module.createUnreachable();\r\n\r\n    // to compile just the value, we need to know the target's type\r\n    var targetType: Type;\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>target)) { // reports; not yet compiled if a static field compiled as a global\r\n          return this.module.createUnreachable();\r\n        }\r\n        assert((<Global>target).type != Type.void); // compileGlobal must guarantee this\r\n        // fall-through\r\n      }\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        targetType = (<VariableLikeElement>target).type;\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let setterPrototype = (<Property>target).setterPrototype;\r\n        if (setterPrototype) {\r\n          let instance = this.resolver.resolveFunction(setterPrototype, null);\r\n          if (!instance) return this.module.createUnreachable();\r\n          assert(instance.signature.parameterTypes.length == 1); // parser must guarantee this\r\n          targetType = instance.signature.parameterTypes[0];\r\n          break;\r\n        }\r\n        this.error(\r\n          DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n          expression.range, (<Property>target).internalName\r\n        );\r\n        return this.module.createUnreachable();\r\n      }\r\n      case ElementKind.CLASS: {\r\n        if (resolver.currentElementExpression) { // indexed access\r\n          let isUnchecked = currentFunction.flow.is(FlowFlags.UNCHECKED_CONTEXT);\r\n          let indexedSet = (<Class>target).lookupOverload(OperatorKind.INDEXED_SET, isUnchecked);\r\n          if (!indexedSet) {\r\n            let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET, isUnchecked);\r\n            if (!indexedGet) {\r\n              this.error(\r\n                DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n                expression.range, (<Class>target).internalName\r\n              );\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode.Index_signature_in_type_0_only_permits_reading,\r\n                expression.range, (<Class>target).internalName\r\n              );\r\n            }\r\n            return this.module.createUnreachable();\r\n          }\r\n          assert(indexedSet.signature.parameterTypes.length == 2); // parser must guarantee this\r\n          targetType = indexedSet.signature.parameterTypes[1];    // 2nd parameter is the element\r\n          break;\r\n        }\r\n        // fall-through\r\n      }\r\n      default: {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        return this.module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // compile the value and do the assignment\r\n    assert(targetType != Type.void);\r\n    var valueExpr = this.compileExpression(valueExpression, targetType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n    return this.compileAssignmentWithValue(\r\n      expression,\r\n      valueExpr,\r\n      contextualType != Type.void\r\n    );\r\n  }\r\n\r\n  compileAssignmentWithValue(\r\n    expression: Expression,\r\n    valueWithCorrectType: ExpressionRef,\r\n    tee: bool = false\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var target = this.resolver.resolveExpression(expression, this.currentFunction); // reports\r\n    if (!target) return module.createUnreachable();\r\n\r\n    switch (target.kind) {\r\n      case ElementKind.LOCAL: {\r\n        let type = (<Local>target).type;\r\n        assert(type != Type.void);\r\n        this.currentType = tee ? type : Type.void;\r\n        if ((<Local>target).is(CommonFlags.CONST)) {\r\n          this.error(\r\n            DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n            expression.range, target.internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        let flow = this.currentFunction.flow;\r\n        if (type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n          flow.setLocalWrapped((<Local>target).index, !flow.canOverflow(valueWithCorrectType, type));\r\n        }\r\n        return tee\r\n          ? module.createTeeLocal((<Local>target).index, valueWithCorrectType)\r\n          : module.createSetLocal((<Local>target).index, valueWithCorrectType);\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>target)) return module.createUnreachable();\r\n        let type = (<Global>target).type;\r\n        assert(type != Type.void);\r\n        this.currentType = tee ? type : Type.void;\r\n        if ((<Local>target).is(CommonFlags.CONST)) {\r\n          this.error(\r\n            DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n            expression.range,\r\n            target.internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        valueWithCorrectType = this.ensureSmallIntegerWrap(valueWithCorrectType, type); // guaranteed\r\n        if (tee) {\r\n          let nativeType = type.toNativeType();\r\n          let internalName = target.internalName;\r\n          return module.createBlock(null, [ // emulated teeGlobal\r\n            module.createSetGlobal(internalName, valueWithCorrectType),\r\n            module.createGetGlobal(internalName, nativeType)\r\n          ], nativeType);\r\n        } else {\r\n          return module.createSetGlobal(target.internalName, valueWithCorrectType);\r\n        }\r\n      }\r\n      case ElementKind.FIELD: {\r\n        const declaration = (<Field>target).declaration;\r\n        if (\r\n          (<Field>target).is(CommonFlags.READONLY) &&\r\n          !(\r\n            this.currentFunction.is(CommonFlags.CONSTRUCTOR) ||\r\n            declaration == null ||\r\n            declaration.initializer != null\r\n          )\r\n        ) {\r\n          this.error(\r\n            DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n            expression.range, (<Field>target).internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        let thisExpression = assert(this.resolver.currentThisExpression);\r\n        let thisExpr = this.compileExpressionRetainType(\r\n          thisExpression,\r\n          this.options.usizeType,\r\n          WrapMode.NONE\r\n        );\r\n        let type = (<Field>target).type;\r\n        this.currentType = tee ? type : Type.void;\r\n        let nativeType = type.toNativeType();\r\n        if (type.kind == TypeKind.BOOL) {\r\n          // make sure bools are wrapped (usually are) when storing as 8 bits\r\n          valueWithCorrectType = this.ensureSmallIntegerWrap(valueWithCorrectType, type);\r\n        }\r\n        if (tee) {\r\n          let currentFunction = this.currentFunction;\r\n          let flow = currentFunction.flow;\r\n          let tempLocal = currentFunction.getAndFreeTempLocal(\r\n            type,\r\n            !flow.canOverflow(valueWithCorrectType, type)\r\n          );\r\n          let tempLocalIndex = tempLocal.index;\r\n          // TODO: simplify if valueWithCorrectType has no side effects\r\n          // TODO: call __gc_link here if a GC is present\r\n          return module.createBlock(null, [\r\n            module.createSetLocal(tempLocalIndex, valueWithCorrectType),\r\n            module.createStore(\r\n              type.byteSize,\r\n              thisExpr,\r\n              module.createGetLocal(tempLocalIndex, nativeType),\r\n              nativeType,\r\n              (<Field>target).memoryOffset\r\n            ),\r\n            module.createGetLocal(tempLocalIndex, nativeType)\r\n          ], nativeType);\r\n        } else {\r\n          // TODO: call __gc_link here if a GC is present\r\n          return module.createStore(\r\n            type.byteSize,\r\n            thisExpr,\r\n            valueWithCorrectType,\r\n            nativeType,\r\n            (<Field>target).memoryOffset\r\n          );\r\n        }\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let setterPrototype = (<Property>target).setterPrototype;\r\n        if (setterPrototype) {\r\n          let setterInstance = this.resolver.resolveFunction(setterPrototype, null);\r\n          if (!setterInstance) return module.createUnreachable();\r\n\r\n          // call just the setter if the return value isn't of interest\r\n          if (!tee) {\r\n            if (setterInstance.is(CommonFlags.INSTANCE)) {\r\n              let thisExpression = assert(this.resolver.currentThisExpression);\r\n              let thisExpr = this.compileExpressionRetainType(\r\n                thisExpression,\r\n                this.options.usizeType,\r\n                WrapMode.NONE\r\n              );\r\n              return this.makeCallDirect(setterInstance, [ thisExpr, valueWithCorrectType ]);\r\n            } else {\r\n              return this.makeCallDirect(setterInstance, [ valueWithCorrectType ]);\r\n            }\r\n          }\r\n\r\n          // otherwise call the setter first, then the getter\r\n          let getterPrototype = (<Property>target).getterPrototype;\r\n          assert(getterPrototype != null); // must have one if there is a setter\r\n          let getterInstance = this.resolver.resolveFunction(<FunctionPrototype>getterPrototype, null);\r\n          if (!getterInstance) return module.createUnreachable();\r\n          let returnType = getterInstance.signature.returnType;\r\n          let nativeReturnType = returnType.toNativeType();\r\n          if (setterInstance.is(CommonFlags.INSTANCE)) {\r\n            let thisExpression = assert(this.resolver.currentThisExpression);\r\n            let thisExpr = this.compileExpressionRetainType(\r\n              thisExpression,\r\n              this.options.usizeType,\r\n              WrapMode.NONE\r\n            );\r\n            let tempLocal = this.currentFunction.getAndFreeTempLocal(returnType, false);\r\n            let tempLocalIndex = tempLocal.index;\r\n            return module.createBlock(null, [\r\n              this.makeCallDirect(setterInstance, [ // set and remember the target\r\n                module.createTeeLocal(tempLocalIndex, thisExpr),\r\n                valueWithCorrectType\r\n              ]),\r\n              this.makeCallDirect(getterInstance, [ // get from remembered target\r\n                module.createGetLocal(tempLocalIndex, nativeReturnType)\r\n              ])\r\n            ], nativeReturnType);\r\n          } else {\r\n            // note that this must be performed here because `resolved` is shared\r\n            return module.createBlock(null, [\r\n              this.makeCallDirect(setterInstance, [ valueWithCorrectType ]),\r\n              this.makeCallDirect(getterInstance)\r\n            ], nativeReturnType);\r\n          }\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n            expression.range, target.internalName\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      case ElementKind.CLASS: {\r\n        let elementExpression = this.resolver.currentElementExpression;\r\n        if (elementExpression) {\r\n          let isUnchecked = this.currentFunction.flow.is(FlowFlags.UNCHECKED_CONTEXT);\r\n          let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET, isUnchecked);\r\n          if (!indexedGet) {\r\n            this.error(\r\n              DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n              expression.range, target.internalName\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          let indexedSet = (<Class>target).lookupOverload(OperatorKind.INDEXED_SET, isUnchecked);\r\n          if (!indexedSet) {\r\n            this.error(\r\n              DiagnosticCode.Index_signature_in_type_0_only_permits_reading,\r\n              expression.range, target.internalName\r\n            );\r\n            this.currentType = tee ? indexedGet.signature.returnType : Type.void;\r\n            return module.createUnreachable();\r\n          }\r\n          let targetType = (<Class>target).type;\r\n          let thisExpression = assert(this.resolver.currentThisExpression);\r\n          let thisExpr = this.compileExpressionRetainType(\r\n            thisExpression,\r\n            this.options.usizeType,\r\n            WrapMode.NONE\r\n          );\r\n          let elementExpr = this.compileExpression(\r\n            elementExpression,\r\n            Type.i32,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n          if (tee) {\r\n            let currentFunction = this.currentFunction;\r\n            let tempLocalTarget = currentFunction.getTempLocal(targetType, false);\r\n            let tempLocalElement = currentFunction.getAndFreeTempLocal(this.currentType, false);\r\n            let returnType = indexedGet.signature.returnType;\r\n            this.currentFunction.freeTempLocal(tempLocalTarget);\r\n            return module.createBlock(null, [\r\n              this.makeCallDirect(indexedSet, [\r\n                module.createTeeLocal(tempLocalTarget.index, thisExpr),\r\n                module.createTeeLocal(tempLocalElement.index, elementExpr),\r\n                valueWithCorrectType\r\n              ]),\r\n              this.makeCallDirect(indexedGet, [\r\n                module.createGetLocal(tempLocalTarget.index, tempLocalTarget.type.toNativeType()),\r\n                module.createGetLocal(tempLocalElement.index, tempLocalElement.type.toNativeType())\r\n              ])\r\n            ], returnType.toNativeType());\r\n          } else {\r\n            return this.makeCallDirect(indexedSet, [\r\n              thisExpr,\r\n              elementExpr,\r\n              valueWithCorrectType\r\n            ]);\r\n          }\r\n        }\r\n        // fall-through\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      expression.range\r\n    );\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  compileCallExpression(expression: CallExpression, contextualType: Type): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n    var target = this.resolver.resolveExpression(expression.expression, currentFunction); // reports\r\n    if (!target) return module.createUnreachable();\r\n\r\n    var signature: Signature | null;\r\n    var indexArg: ExpressionRef;\r\n    switch (target.kind) {\r\n\r\n      // direct call: concrete function\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        let prototype = <FunctionPrototype>target;\r\n        let typeArguments = expression.typeArguments;\r\n\r\n        // builtins handle present respectively omitted type arguments on their own\r\n        if (prototype.hasDecorator(DecoratorFlags.BUILTIN)) {\r\n          return this.compileCallExpressionBuiltin(prototype, expression, contextualType);\r\n        }\r\n\r\n        let instance: Function | null = null;\r\n\r\n        // resolve generic call if type arguments have been provided\r\n        if (typeArguments) {\r\n          if (!prototype.is(CommonFlags.GENERIC)) {\r\n            this.error(\r\n              DiagnosticCode.Type_0_is_not_generic,\r\n              expression.expression.range, prototype.internalName\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          instance = this.resolver.resolveFunctionInclTypeArguments(\r\n            prototype,\r\n            typeArguments,\r\n            this.currentFunction.flow.contextualTypeArguments,\r\n            expression\r\n          );\r\n\r\n        // infer generic call if type arguments have been omitted\r\n        } else if (prototype.is(CommonFlags.GENERIC)) {\r\n          let inferredTypes = new Map<string,Type | null>();\r\n          let typeParameters = assert(prototype.declaration.typeParameters);\r\n          let numTypeParameters = typeParameters.length;\r\n          for (let i = 0; i < numTypeParameters; ++i) {\r\n            inferredTypes.set(typeParameters[i].name.text, null);\r\n          }\r\n          // let numInferred = 0;\r\n          let parameterTypes = prototype.declaration.signature.parameters;\r\n          let numParameterTypes = parameterTypes.length;\r\n          let argumentExpressions = expression.arguments;\r\n          let numArguments = argumentExpressions.length;\r\n          let argumentExprs = new Array<ExpressionRef>(numArguments);\r\n          for (let i = 0; i < numParameterTypes; ++i) {\r\n            let typeNode = parameterTypes[i].type;\r\n            let name = typeNode.kind == NodeKind.TYPE ? (<TypeNode>typeNode).name.text : null;\r\n            let argumentExpression = i < numArguments\r\n              ? argumentExpressions[i]\r\n              : prototype.declaration.signature.parameters[i].initializer;\r\n            if (!argumentExpression) { // missing initializer -> too few arguments\r\n              this.error(\r\n                DiagnosticCode.Expected_0_arguments_but_got_1,\r\n                expression.range, numParameterTypes.toString(10), numArguments.toString(10)\r\n              );\r\n              return module.createUnreachable();\r\n            }\r\n            if (name !== null && inferredTypes.has(name)) {\r\n              let inferredType = inferredTypes.get(name);\r\n              if (inferredType) {\r\n                argumentExprs[i] = this.compileExpressionRetainType(argumentExpression, inferredType, WrapMode.NONE);\r\n                let commonType: Type | null;\r\n                if (!(commonType = Type.commonCompatible(inferredType, this.currentType, true))) {\r\n                  if (!(commonType = Type.commonCompatible(inferredType, this.currentType, false))) {\r\n                    this.error(\r\n                      DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n                      parameterTypes[i].type.range, this.currentType.toString(), inferredType.toString()\r\n                    );\r\n                    return module.createUnreachable();\r\n                  }\r\n                }\r\n                inferredType = commonType;\r\n              } else {\r\n                argumentExprs[i] = this.compileExpressionRetainType(argumentExpression, Type.i32, WrapMode.NONE);\r\n                inferredType = this.currentType;\r\n                // ++numInferred;\r\n              }\r\n              inferredTypes.set(name, inferredType);\r\n            } else {\r\n              let concreteType = this.resolver.resolveType(\r\n                parameterTypes[i].type,\r\n                this.currentFunction.flow.contextualTypeArguments\r\n              );\r\n              if (!concreteType) return module.createUnreachable();\r\n              argumentExprs[i] = this.compileExpression(\r\n                argumentExpression,\r\n                concreteType,\r\n                ConversionKind.IMPLICIT,\r\n                WrapMode.NONE\r\n              );\r\n            }\r\n          }\r\n          let resolvedTypeArguments = new Array<Type>(numTypeParameters);\r\n          for (let i = 0; i < numTypeParameters; ++i) {\r\n            let inferredType = assert(inferredTypes.get(typeParameters[i].name.text)); // TODO\r\n            resolvedTypeArguments[i] = inferredType;\r\n          }\r\n          instance = this.resolver.resolveFunction(\r\n            prototype,\r\n            resolvedTypeArguments,\r\n            this.currentFunction.flow.contextualTypeArguments\r\n          );\r\n          if (!instance) return this.module.createUnreachable();\r\n          return this.makeCallDirect(instance, argumentExprs);\r\n          // TODO: this skips inlining because inlining requires compiling its temporary locals in\r\n          // the scope of the inlined flow. might need another mechanism to lock temp. locals early,\r\n          // so inlining can be performed in `makeCallDirect` instead?\r\n\r\n        // otherwise resolve the non-generic call as usual\r\n        } else {\r\n          instance = this.resolver.resolveFunction(\r\n            prototype,\r\n            null,\r\n            this.currentFunction.flow.contextualTypeArguments\r\n          );\r\n        }\r\n        if (!instance) return this.module.createUnreachable();\r\n\r\n        // compile 'this' expression if an instance method\r\n        let thisExpr: ExpressionRef = 0;\r\n        if (instance.is(CommonFlags.INSTANCE)) {\r\n          thisExpr = this.compileExpressionRetainType(\r\n            assert(this.resolver.currentThisExpression),\r\n            this.options.usizeType,\r\n            WrapMode.NONE\r\n          );\r\n        }\r\n\r\n        return this.compileCallDirect(\r\n          instance,\r\n          expression.arguments,\r\n          expression,\r\n          thisExpr,\r\n          instance.hasDecorator(DecoratorFlags.INLINE)\r\n        );\r\n      }\r\n\r\n      // indirect call: index argument with signature (non-generic, can't be inlined)\r\n      case ElementKind.LOCAL: {\r\n        if (signature = (<Local>target).type.signatureReference) {\r\n          if ((<Local>target).is(CommonFlags.INLINED)) {\r\n            indexArg = module.createI32(i64_low((<Local>target).constantIntegerValue));\r\n          } else {\r\n            indexArg = module.createGetLocal((<Local>target).index, NativeType.I32);\r\n          }\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n            expression.range, (<Local>target).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (signature = (<Global>target).type.signatureReference) {\r\n          indexArg = module.createGetGlobal((<Global>target).internalName, (<Global>target).type.toNativeType());\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n            expression.range, (<Global>target).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.FIELD: {\r\n        let type = (<Field>target).type;\r\n        if (signature = type.signatureReference) {\r\n          let thisExpression = assert(this.resolver.currentThisExpression);\r\n          let thisExpr = this.compileExpressionRetainType(\r\n            thisExpression,\r\n            this.options.usizeType,\r\n            WrapMode.NONE\r\n          );\r\n          indexArg = module.createLoad(\r\n            4,\r\n            false,\r\n            thisExpr,\r\n            NativeType.I32,\r\n            (<Field>target).memoryOffset\r\n          );\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n            expression.range, type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.FUNCTION_TARGET: {\r\n        signature = (<FunctionTarget>target).signature;\r\n        indexArg = this.compileExpression(\r\n          expression.expression,\r\n          (<FunctionTarget>target).type,\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.NONE\r\n        );\r\n        break;\r\n      }\r\n\r\n      case ElementKind.PROPERTY: {\r\n        indexArg = this.compileGetter(<Property>target, expression.expression);\r\n        let type = this.currentType;\r\n        signature = type.signatureReference;\r\n        if (!signature) {\r\n          this.error(\r\n            DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n            expression.range, type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        break;\r\n      }\r\n\r\n      // not supported\r\n      default: {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n    return this.compileCallIndirect(\r\n      signature,\r\n      indexArg,\r\n      expression.arguments,\r\n      expression\r\n    );\r\n  }\r\n\r\n  private compileCallExpressionBuiltin(\r\n    prototype: FunctionPrototype,\r\n    expression: CallExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    var typeArguments: Type[] | null = null;\r\n\r\n    // builtins handle omitted type arguments on their own. if present, however, resolve them here\r\n    // and pass them to the builtin, even if it's still up to the builtin how to handle them.\r\n    var typeArgumentNodes = expression.typeArguments;\r\n    if (expression.typeArguments) {\r\n      if (!prototype.is(CommonFlags.GENERIC)) {\r\n        this.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          expression.range, prototype.internalName\r\n        );\r\n      }\r\n      typeArguments = this.resolver.resolveTypeArguments(\r\n        assert(prototype.declaration.typeParameters),\r\n        typeArgumentNodes,\r\n        this.currentFunction.flow.contextualTypeArguments,\r\n        expression\r\n      );\r\n    }\r\n\r\n    // now compile the builtin, which usually returns a block of code that replaces the call.\r\n    var expr = compileBuiltinCall(\r\n      this,\r\n      prototype,\r\n      typeArguments,\r\n      expression.arguments,\r\n      contextualType,\r\n      expression\r\n    );\r\n    if (!expr) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        expression.range\r\n      );\r\n      return this.module.createUnreachable();\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  /**\r\n   * Checks that a call with the given number as arguments can be performed according to the\r\n   * specified signature.\r\n   */\r\n  checkCallSignature(\r\n    signature: Signature,\r\n    numArguments: i32,\r\n    hasThis: bool,\r\n    reportNode: Node\r\n  ): bool {\r\n\r\n    // cannot call an instance method without a `this` argument (TODO: `.call`?)\r\n    var thisType = signature.thisType;\r\n    if (hasThis != (thisType != null)) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported, // TODO: better message?\r\n        reportNode.range\r\n      );\r\n      return false;\r\n    }\r\n\r\n    // not yet implemented (TODO: maybe some sort of an unmanaged/lightweight array?)\r\n    var hasRest = signature.hasRest;\r\n    if (hasRest) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        reportNode.range\r\n      );\r\n      return false;\r\n    }\r\n\r\n    var minimum = signature.requiredParameters;\r\n    var maximum = signature.parameterTypes.length;\r\n\r\n    // must at least be called with required arguments\r\n    if (numArguments < minimum) {\r\n      this.error(\r\n        minimum < maximum\r\n          ? DiagnosticCode.Expected_at_least_0_arguments_but_got_1\r\n          : DiagnosticCode.Expected_0_arguments_but_got_1,\r\n        reportNode.range, minimum.toString(), numArguments.toString()\r\n      );\r\n      return false;\r\n    }\r\n\r\n    // must not be called with more than the maximum arguments\r\n    if (numArguments > maximum && !hasRest) {\r\n      this.error(\r\n        DiagnosticCode.Expected_0_arguments_but_got_1,\r\n        reportNode.range, maximum.toString(), numArguments.toString()\r\n      );\r\n      return false;\r\n    }\r\n\r\n    return true;\r\n  }\r\n\r\n  /** Compiles a direct call to a concrete function. */\r\n  compileCallDirect(\r\n    instance: Function,\r\n    argumentExpressions: Expression[],\r\n    reportNode: Node,\r\n    thisArg: ExpressionRef = 0,\r\n    inline: bool = false\r\n  ): ExpressionRef {\r\n    var numArguments = argumentExpressions.length;\r\n    var signature = instance.signature;\r\n\r\n    if (!this.checkCallSignature( // reports\r\n      signature,\r\n      numArguments,\r\n      thisArg != 0,\r\n      reportNode\r\n    )) {\r\n      return this.module.createUnreachable();\r\n    }\r\n\r\n    // Inline if explicitly requested\r\n    if (inline) {\r\n      assert(!instance.is(CommonFlags.TRAMPOLINE)); // doesn't make sense\r\n      if (this.currentInlineFunctions.includes(instance)) {\r\n        this.warning(\r\n          DiagnosticCode.Function_0_cannot_be_inlined_into_itself,\r\n          reportNode.range, instance.internalName\r\n        );\r\n      } else {\r\n        this.currentInlineFunctions.push(instance);\r\n        let expr = this.compileCallInlineUnchecked(instance, argumentExpressions, reportNode, thisArg);\r\n        this.currentInlineFunctions.pop();\r\n        return expr;\r\n      }\r\n    }\r\n\r\n    // Otherwise compile to just a call\r\n    var numArgumentsInclThis = thisArg ? numArguments + 1 : numArguments;\r\n    var operands = new Array<ExpressionRef>(numArgumentsInclThis);\r\n    var index = 0;\r\n    if (thisArg) {\r\n      operands[0] = thisArg;\r\n      index = 1;\r\n    }\r\n    var parameterTypes = signature.parameterTypes;\r\n    for (let i = 0; i < numArguments; ++i, ++index) {\r\n      operands[index] = this.compileExpression(\r\n        argumentExpressions[i],\r\n        parameterTypes[i],\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    assert(index == numArgumentsInclThis);\r\n    return this.makeCallDirect(instance, operands);\r\n  }\r\n\r\n  // Depends on being pre-checked in compileCallDirect\r\n  private compileCallInlineUnchecked(\r\n    instance: Function,\r\n    argumentExpressions: Expression[],\r\n    reportNode: Node,\r\n    thisArg: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    var numArguments = argumentExpressions.length;\r\n    var signature = instance.signature;\r\n    var currentFunction = this.currentFunction;\r\n    var module = this.module;\r\n    var declaration = instance.prototype.declaration;\r\n\r\n    // Create an empty child flow with its own scope and mark it for inlining\r\n    var previousFlow = currentFunction.flow;\r\n    var returnLabel = instance.internalName + \"|inlined.\" + (instance.nextInlineId++).toString(10);\r\n    var returnType = instance.signature.returnType;\r\n    var flow = Flow.create(currentFunction);\r\n    flow.set(FlowFlags.INLINE_CONTEXT);\r\n    flow.returnLabel = returnLabel;\r\n    flow.returnType = returnType;\r\n    flow.contextualTypeArguments = instance.contextualTypeArguments;\r\n\r\n    // Convert provided call arguments to temporary locals. It is important that these are compiled\r\n    // here, with their respective locals being blocked. There is no 'makeCallInline'.\r\n    var body = [];\r\n    if (thisArg) {\r\n      let parent = assert(instance.parent);\r\n      assert(parent.kind == ElementKind.CLASS);\r\n      if (getExpressionId(thisArg) == ExpressionId.GetLocal) {\r\n        flow.addScopedLocalAlias(\r\n          getGetLocalIndex(thisArg),\r\n          (<Class>parent).type,\r\n          \"this\"\r\n        );\r\n      } else {\r\n        let thisLocal = flow.addScopedLocal((<Class>parent).type, \"this\", false);\r\n        body.push(\r\n          module.createSetLocal(thisLocal.index, thisArg)\r\n        );\r\n      }\r\n    }\r\n    var parameterTypes = signature.parameterTypes;\r\n    for (let i = 0; i < numArguments; ++i) {\r\n      let paramExpr = this.compileExpression(\r\n        argumentExpressions[i],\r\n        parameterTypes[i],\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      if (getExpressionId(paramExpr) == ExpressionId.GetLocal) {\r\n        flow.addScopedLocalAlias(\r\n          getGetLocalIndex(paramExpr),\r\n          parameterTypes[i],\r\n          signature.getParameterName(i)\r\n        );\r\n        // inherits wrap status\r\n      } else {\r\n        let argumentLocal = flow.addScopedLocal(\r\n          parameterTypes[i],\r\n          signature.getParameterName(i),\r\n          !flow.canOverflow(paramExpr, parameterTypes[i])\r\n        );\r\n        body.push(\r\n          module.createSetLocal(argumentLocal.index, paramExpr)\r\n        );\r\n      }\r\n    }\r\n\r\n    // Compile optional parameter initializers in the scope of the inlined flow\r\n    currentFunction.flow = flow;\r\n    var numParameters = signature.parameterTypes.length;\r\n    for (let i = numArguments; i < numParameters; ++i) {\r\n      let initExpr = this.compileExpression(\r\n        assert(declaration.signature.parameters[i].initializer),\r\n        parameterTypes[i],\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.WRAP\r\n      );\r\n      let argumentLocal = flow.addScopedLocal(\r\n        parameterTypes[i],\r\n        signature.getParameterName(i),\r\n        !flow.canOverflow(initExpr, parameterTypes[i])\r\n      );\r\n      body.push(\r\n        module.createSetLocal(argumentLocal.index, initExpr)\r\n      );\r\n    }\r\n\r\n    // Compile the called function's body in the scope of the inlined flow\r\n    var bodyStatement = assert(declaration.body);\r\n    if (bodyStatement.kind == NodeKind.BLOCK) {\r\n      let statements = (<BlockStatement>bodyStatement).statements;\r\n      for (let i = 0, k = statements.length; i < k; ++i) {\r\n        let stmt = this.compileStatement(statements[i]);\r\n        if (getExpressionId(stmt) != ExpressionId.Nop) {\r\n          body.push(stmt);\r\n          if (flow.isAny(FlowFlags.ANY_TERMINATING)) break;\r\n        }\r\n      }\r\n    } else {\r\n      body.push(this.compileStatement(bodyStatement));\r\n    }\r\n\r\n    // Free any new scoped locals and reset to the original flow\r\n    var scopedLocals = flow.scopedLocals;\r\n    if (scopedLocals) {\r\n      for (let scopedLocal of scopedLocals.values()) {\r\n        if (scopedLocal.is(CommonFlags.SCOPED)) { // otherwise an alias\r\n          currentFunction.freeTempLocal(scopedLocal);\r\n        }\r\n      }\r\n      flow.scopedLocals = null;\r\n    }\r\n    flow.finalize();\r\n    this.currentFunction.flow = previousFlow;\r\n    this.currentType = returnType;\r\n\r\n    // Check that all branches are terminated\r\n    if (returnType != Type.void && !flow.isAny(FlowFlags.ANY_TERMINATING)) {\r\n      this.error(\r\n        DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,\r\n        declaration.signature.returnType.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    return module.createBlock(returnLabel, body, returnType.toNativeType());\r\n  }\r\n\r\n  /** Gets the trampoline for the specified function. */\r\n  ensureTrampoline(original: Function): Function {\r\n    // A trampoline is a function that takes a fixed amount of operands with some of them possibly\r\n    // being zeroed. It takes one additional argument denoting the number of actual operands\r\n    // provided to the call, and takes appropriate steps to initialize zeroed operands to their\r\n    // default values using the optional parameter initializers of the original function. Doing so\r\n    // allows calls to functions with optional parameters to circumvent the trampoline when all\r\n    // parameters are provided as a fast route, respectively setting up omitted operands in a proper\r\n    // context otherwise.\r\n    var trampoline = original.trampoline;\r\n    if (trampoline) return trampoline;\r\n\r\n    var originalSignature = original.signature;\r\n    var originalName = original.internalName;\r\n    var originalParameterTypes = originalSignature.parameterTypes;\r\n    var originalParameterDeclarations = original.prototype.declaration.signature.parameters;\r\n    var commonReturnType = originalSignature.returnType;\r\n    var commonThisType = originalSignature.thisType;\r\n    var isInstance = original.is(CommonFlags.INSTANCE);\r\n\r\n    // arguments excl. `this`, operands incl. `this`\r\n    var minArguments = originalSignature.requiredParameters;\r\n    var minOperands = minArguments;\r\n    var maxArguments = originalParameterTypes.length;\r\n    var maxOperands = maxArguments;\r\n    if (isInstance) {\r\n      ++minOperands;\r\n      ++maxOperands;\r\n    }\r\n    var numOptional = assert(maxOperands - minOperands);\r\n\r\n    var forwardedOperands = new Array<ExpressionRef>(minOperands);\r\n    var operandIndex = 0;\r\n\r\n    // forward `this` if applicable\r\n    var module = this.module;\r\n    if (isInstance) {\r\n      forwardedOperands[0] = module.createGetLocal(0, this.options.nativeSizeType);\r\n      operandIndex = 1;\r\n    }\r\n\r\n    // forward required arguments\r\n    for (let i = 0; i < minArguments; ++i, ++operandIndex) {\r\n      forwardedOperands[operandIndex] = module.createGetLocal(operandIndex, originalParameterTypes[i].toNativeType());\r\n    }\r\n    assert(operandIndex == minOperands);\r\n\r\n    // create the trampoline element\r\n    var trampolineSignature = new Signature(originalParameterTypes, commonReturnType, commonThisType);\r\n    var trampolineName = originalName + \"|trampoline\";\r\n    trampolineSignature.requiredParameters = maxArguments;\r\n    trampoline = new Function(\r\n      original.prototype,\r\n      trampolineName,\r\n      trampolineSignature,\r\n      original.parent,\r\n      original.contextualTypeArguments\r\n    );\r\n    trampoline.set(original.flags | CommonFlags.TRAMPOLINE | CommonFlags.COMPILED);\r\n    original.trampoline = trampoline;\r\n\r\n    // compile initializers of omitted arguments in scope of the trampoline function\r\n    // this is necessary because initializers might need additional locals and a proper this context\r\n    var previousFunction = this.currentFunction;\r\n    this.currentFunction = trampoline;\r\n\r\n    // create a br_table switching over the number of optional parameters provided\r\n    var numNames = numOptional + 1; // incl. outer block\r\n    var names = new Array<string>(numNames);\r\n    var ofN = \"of\" + numOptional.toString(10);\r\n    for (let i = 0; i < numNames; ++i) {\r\n      let label = i.toString(10) + ofN;\r\n      names[i] = label;\r\n    }\r\n    var body = module.createBlock(names[0], [\r\n      module.createBlock(\"outOfRange\", [\r\n        module.createSwitch(names, \"outOfRange\",\r\n          // condition is number of provided optional arguments, so subtract required arguments\r\n          minArguments\r\n            ? module.createBinary(\r\n                BinaryOp.SubI32,\r\n                module.createGetGlobal(\"~argc\", NativeType.I32),\r\n                module.createI32(minArguments)\r\n              )\r\n            : module.createGetGlobal(\"~argc\", NativeType.I32)\r\n        )\r\n      ]),\r\n      module.createUnreachable()\r\n    ]);\r\n    for (let i = 0; i < numOptional; ++i, ++operandIndex) {\r\n      let type = originalParameterTypes[minArguments + i];\r\n      let declaration = originalParameterDeclarations[minArguments + i];\r\n      let initializer = declaration.initializer;\r\n      let initExpr: ExpressionRef;\r\n      if (initializer) {\r\n        initExpr = module.createSetLocal(operandIndex,\r\n          this.compileExpression(\r\n            initializer,\r\n            type,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP\r\n          )\r\n        );\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Optional_parameter_must_have_an_initializer,\r\n          declaration.range\r\n        );\r\n        initExpr = module.createUnreachable();\r\n      }\r\n      body = module.createBlock(names[i + 1], [\r\n        body,\r\n        initExpr,\r\n      ]);\r\n      forwardedOperands[operandIndex] = module.createGetLocal(operandIndex, type.toNativeType());\r\n    }\r\n    this.currentFunction = previousFunction;\r\n    assert(operandIndex == maxOperands);\r\n\r\n    var funcRef = module.addFunction(\r\n      trampolineName,\r\n      this.ensureFunctionType(\r\n        trampolineSignature.parameterTypes,\r\n        trampolineSignature.returnType,\r\n        trampolineSignature.thisType\r\n      ),\r\n      typesToNativeTypes(trampoline.additionalLocals),\r\n      module.createBlock(null, [\r\n        body,\r\n        module.createCall(\r\n          originalName,\r\n          forwardedOperands,\r\n          commonReturnType.toNativeType()\r\n        )\r\n      ], commonReturnType.toNativeType())\r\n    );\r\n    trampoline.finalize(module, funcRef);\r\n    return trampoline;\r\n  }\r\n\r\n  /** Makes sure that the argument count helper global is present and returns its name. */\r\n  private ensureArgcVar(): string {\r\n    var internalName = \"~argc\";\r\n    if (!this.argcVar) {\r\n      let module = this.module;\r\n      this.argcVar = module.addGlobal(\r\n        internalName,\r\n        NativeType.I32,\r\n        true,\r\n        module.createI32(0)\r\n      );\r\n    }\r\n    return internalName;\r\n  }\r\n\r\n  /** Makes sure that the argument count helper setter is present and returns its name. */\r\n  private ensureArgcSet(): string {\r\n    var internalName = \"~setargc\";\r\n    if (!this.argcSet) {\r\n      let module = this.module;\r\n      this.argcSet = module.addFunction(internalName,\r\n        this.ensureFunctionType([ Type.u32 ], Type.void),\r\n        null,\r\n        module.createSetGlobal(this.ensureArgcVar(),\r\n          module.createGetLocal(0, NativeType.I32)\r\n        )\r\n      );\r\n      module.addFunctionExport(internalName, \"_setargc\");\r\n    }\r\n    return internalName;\r\n  }\r\n\r\n  /** Creates a direct call to the specified function. */\r\n  makeCallDirect(\r\n    instance: Function,\r\n    operands: ExpressionRef[] | null = null\r\n  ): ExpressionRef {\r\n    var numOperands = operands ? operands.length : 0;\r\n    var numArguments = numOperands;\r\n    var minArguments = instance.signature.requiredParameters;\r\n    var minOperands = minArguments;\r\n    var maxArguments = instance.signature.parameterTypes.length;\r\n    var maxOperands = maxArguments;\r\n    if (instance.is(CommonFlags.INSTANCE)) {\r\n      ++minOperands;\r\n      ++maxOperands;\r\n      --numArguments;\r\n    }\r\n    assert(numOperands >= minOperands);\r\n\r\n    var module = this.module;\r\n    if (!this.compileFunction(instance)) return module.createUnreachable();\r\n    var returnType = instance.signature.returnType;\r\n    var isCallImport = instance.is(CommonFlags.MODULE_IMPORT);\r\n\r\n    // fill up omitted arguments with their initializers, if constant, otherwise with zeroes.\r\n    if (numOperands < maxOperands) {\r\n      if (!operands) {\r\n        operands = new Array(maxOperands);\r\n        operands.length = 0;\r\n      }\r\n      let parameterTypes = instance.signature.parameterTypes;\r\n      let parameterNodes = instance.prototype.declaration.signature.parameters;\r\n      let allOptionalsAreConstant = true;\r\n      for (let i = numArguments; i < maxArguments; ++i) {\r\n        let initializer = parameterNodes[i].initializer;\r\n        if (!(initializer !== null && nodeIsConstantValue(initializer.kind))) {\r\n          allOptionalsAreConstant = false;\r\n          break;\r\n        }\r\n      }\r\n      if (allOptionalsAreConstant) { // inline into the call\r\n        for (let i = numArguments; i < maxArguments; ++i) {\r\n          operands.push(\r\n            this.compileExpression(\r\n              <Expression>parameterNodes[i].initializer,\r\n              parameterTypes[i],\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE\r\n            )\r\n          );\r\n        }\r\n      } else { // otherwise fill up with zeroes and call the trampoline\r\n        for (let i = numArguments; i < maxArguments; ++i) {\r\n          operands.push(parameterTypes[i].toNativeZero(module));\r\n        }\r\n        if (!isCallImport) {\r\n          let original = instance;\r\n          instance = this.ensureTrampoline(instance);\r\n          if (!this.compileFunction(instance)) return module.createUnreachable();\r\n          instance.flow.flags = original.flow.flags;\r\n          this.program.instancesLookup.set(instance.internalName, instance); // so canOverflow can find it\r\n          let nativeReturnType = returnType.toNativeType();\r\n          this.currentType = returnType;\r\n          return module.createBlock(null, [\r\n            module.createSetGlobal(this.ensureArgcVar(), module.createI32(numArguments)),\r\n            module.createCall(instance.internalName, operands, nativeReturnType)\r\n          ], nativeReturnType);\r\n        }\r\n      }\r\n    }\r\n\r\n    // otherwise just call through\r\n    this.currentType = returnType;\r\n    if (isCallImport) return module.createCallImport(instance.internalName, operands, returnType.toNativeType());\r\n    var ret = module.createCall(instance.internalName, operands, returnType.toNativeType());\r\n    return ret;\r\n  }\r\n\r\n  /** Compiles an indirect call using an index argument and a signature. */\r\n  compileCallIndirect(\r\n    signature: Signature,\r\n    indexArg: ExpressionRef,\r\n    argumentExpressions: Expression[],\r\n    reportNode: Node,\r\n    thisArg: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    var numArguments = argumentExpressions.length;\r\n\r\n    if (!this.checkCallSignature( // reports\r\n      signature,\r\n      numArguments,\r\n      thisArg != 0,\r\n      reportNode\r\n    )) {\r\n      return this.module.createUnreachable();\r\n    }\r\n\r\n    var numArgumentsInclThis = thisArg ? numArguments + 1 : numArguments;\r\n    var operands = new Array<ExpressionRef>(numArgumentsInclThis);\r\n    var index = 0;\r\n    if (thisArg) {\r\n      operands[0] = thisArg;\r\n      index = 1;\r\n    }\r\n    var parameterTypes = signature.parameterTypes;\r\n    for (let i = 0; i < numArguments; ++i, ++index) {\r\n      operands[index] = this.compileExpression(\r\n        argumentExpressions[i],\r\n        parameterTypes[i],\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    assert(index == numArgumentsInclThis);\r\n    return this.makeCallIndirect(signature, indexArg, operands);\r\n  }\r\n\r\n  /** Creates an indirect call to the function at `indexArg` in the function table. */\r\n  makeCallIndirect(\r\n    signature: Signature,\r\n    indexArg: ExpressionRef,\r\n    operands: ExpressionRef[] | null = null\r\n  ): ExpressionRef {\r\n    var numOperands = operands ? operands.length : 0;\r\n    var numArguments = numOperands;\r\n    var minArguments = signature.requiredParameters;\r\n    var minOperands = minArguments;\r\n    var maxArguments = signature.parameterTypes.length;\r\n    var maxOperands = maxArguments;\r\n    if (signature.thisType) {\r\n      ++minOperands;\r\n      ++maxOperands;\r\n      --numArguments;\r\n    }\r\n    assert(numOperands >= minOperands);\r\n\r\n    this.ensureFunctionType(signature.parameterTypes, signature.returnType, signature.thisType);\r\n    var module = this.module;\r\n\r\n    // fill up omitted arguments with zeroes\r\n    if (numOperands < maxOperands) {\r\n      if (!operands) {\r\n        operands = new Array(maxOperands);\r\n        operands.length = 0;\r\n      }\r\n      let parameterTypes = signature.parameterTypes;\r\n      for (let i = numArguments; i < maxArguments; ++i) {\r\n        operands.push(parameterTypes[i].toNativeZero(module));\r\n      }\r\n    }\r\n\r\n    var returnType = signature.returnType;\r\n    this.currentType = returnType;\r\n    return module.createBlock(null, [\r\n      module.createSetGlobal(this.ensureArgcVar(), // might still be calling a trampoline\r\n        module.createI32(numArguments)\r\n      ),\r\n      module.createCallIndirect(indexArg, operands, signature.toSignatureString())\r\n    ], returnType.toNativeType()); // not necessarily wrapped\r\n  }\r\n\r\n  compileCommaExpression(expression: CommaExpression, contextualType: Type): ExpressionRef {\r\n    var expressions = expression.expressions;\r\n    var numExpressions = expressions.length;\r\n    var exprs = new Array<ExpressionRef>(numExpressions--);\r\n    for (let i = 0; i < numExpressions; ++i) {\r\n      exprs[i] = this.compileExpression(\r\n        expressions[i],\r\n        Type.void, // drop all\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    exprs[numExpressions] = this.compileExpression(\r\n      expressions[numExpressions],\r\n      contextualType, // except last\r\n      ConversionKind.IMPLICIT,\r\n      WrapMode.NONE\r\n    );\r\n    return this.module.createBlock(null, exprs, this.currentType.toNativeType());\r\n  }\r\n\r\n  compileElementAccessExpression(expression: ElementAccessExpression, contextualType: Type): ExpressionRef {\r\n    var target = this.resolver.resolveElementAccess(expression, this.currentFunction); // reports\r\n    if (!target) return this.module.createUnreachable();\r\n    switch (target.kind) {\r\n      case ElementKind.CLASS: {\r\n        let isUnchecked = this.currentFunction.flow.is(FlowFlags.UNCHECKED_CONTEXT);\r\n        let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET, isUnchecked);\r\n        if (!indexedGet) {\r\n          this.error(\r\n            DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n            expression.expression.range, (<Class>target).internalName\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n        let thisArg = this.compileExpression(\r\n          expression.expression,\r\n          (<Class>target).type,\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.NONE\r\n        );\r\n        return this.compileCallDirect(indexedGet, [\r\n          expression.elementExpression\r\n        ], expression, thisArg);\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      expression.range\r\n    );\r\n    return this.module.createUnreachable();\r\n  }\r\n\r\n  compileFunctionExpression(expression: FunctionExpression, contextualType: Type): ExpressionRef {\r\n    var declaration = expression.declaration;\r\n    var name = declaration.name;\r\n    var simpleName = (name.text.length\r\n      ? name.text\r\n      : \"anonymous\") + \"|\" + this.functionTable.length.toString(10);\r\n    var currentFunction = this.currentFunction;\r\n    var prototype = new FunctionPrototype(\r\n      this.program,\r\n      simpleName,\r\n      currentFunction.internalName + INNER_DELIMITER + simpleName,\r\n      declaration,\r\n      null,\r\n      DecoratorFlags.NONE\r\n    );\r\n    var flow = currentFunction.flow;\r\n    var instance = this.compileFunctionUsingTypeArguments(\r\n      prototype,\r\n      [],\r\n      flow.contextualTypeArguments,\r\n      flow,\r\n      declaration\r\n    );\r\n    if (!instance) return this.module.createUnreachable();\r\n    this.currentType = instance.signature.type; // TODO: get cached type?\r\n    // NOTE that, in order to make this work in every case, the function must be represented by a\r\n    // value, so we add it and rely on the optimizer to figure out where it can be called directly.\r\n    var index = this.ensureFunctionTableEntry(instance); // reports\r\n    return index < 0\r\n      ? this.module.createUnreachable()\r\n      : this.module.createI32(index);\r\n  }\r\n\r\n  /**\r\n   * Compiles an identifier in the specified context.\r\n   * @param retainConstantType Retains the type of inlined constants if `true`, otherwise\r\n   *  precomputes them according to context.\r\n   */\r\n  compileIdentifierExpression(\r\n    expression: IdentifierExpression,\r\n    contextualType: Type,\r\n    retainConstantType: bool\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n\r\n    // check special keywords first\r\n    switch (expression.kind) {\r\n      case NodeKind.NULL: {\r\n        let options = this.options;\r\n        if (!contextualType.classReference) {\r\n          this.currentType = options.usizeType;\r\n        }\r\n        return options.isWasm64\r\n          ? module.createI64(0)\r\n          : module.createI32(0);\r\n      }\r\n      case NodeKind.TRUE: {\r\n        this.currentType = Type.bool;\r\n        return module.createI32(1);\r\n      }\r\n      case NodeKind.FALSE: {\r\n        this.currentType = Type.bool;\r\n        return module.createI32(0);\r\n      }\r\n      case NodeKind.THIS: {\r\n        let flow = currentFunction.flow;\r\n        if (flow.is(FlowFlags.INLINE_CONTEXT)) {\r\n          let scopedThis = flow.getScopedLocal(\"this\");\r\n          if (scopedThis) {\r\n            this.currentType = scopedThis.type;\r\n            return module.createGetLocal(scopedThis.index, scopedThis.type.toNativeType());\r\n          }\r\n        }\r\n        if (currentFunction.is(CommonFlags.INSTANCE)) {\r\n          let parent = assert(currentFunction.parent);\r\n          assert(parent.kind == ElementKind.CLASS);\r\n          let thisType = (<Class>parent).type;\r\n          if (currentFunction.is(CommonFlags.CONSTRUCTOR)) {\r\n            if (!flow.is(FlowFlags.ALLOCATES)) {\r\n              flow.set(FlowFlags.ALLOCATES);\r\n              // must be conditional because `this` could have been provided by a derived class\r\n              this.currentType = thisType;\r\n              return module.createTeeLocal(0,\r\n                this.makeConditionalAllocate(<Class>parent, expression)\r\n              );\r\n            }\r\n          }\r\n          this.currentType = thisType;\r\n          return module.createGetLocal(0, thisType.toNativeType());\r\n        }\r\n        this.error(\r\n          DiagnosticCode._this_cannot_be_referenced_in_current_location,\r\n          expression.range\r\n        );\r\n        this.currentType = this.options.usizeType;\r\n        return module.createUnreachable();\r\n      }\r\n      case NodeKind.SUPER: {\r\n        let flow = currentFunction.flow;\r\n        if (flow.is(FlowFlags.INLINE_CONTEXT)) {\r\n          let scopedThis = flow.getScopedLocal(\"this\");\r\n          if (scopedThis) {\r\n            let scopedThisClass = assert(scopedThis.type.classReference);\r\n            let base = scopedThisClass.base;\r\n            if (base) {\r\n              this.currentType = base.type;\r\n              return module.createGetLocal(scopedThis.index, base.type.toNativeType());\r\n            }\r\n          }\r\n        }\r\n        if (currentFunction.is(CommonFlags.INSTANCE)) {\r\n          let parent = assert(currentFunction.parent);\r\n          assert(parent.kind == ElementKind.CLASS);\r\n          let base = (<Class>parent).base;\r\n          if (base) {\r\n            let superType = base.type;\r\n            this.currentType = superType;\r\n            return module.createGetLocal(0, superType.toNativeType());\r\n          }\r\n        }\r\n        this.error(\r\n          DiagnosticCode._super_can_only_be_referenced_in_a_derived_class,\r\n          expression.range\r\n        );\r\n        this.currentType = this.options.usizeType;\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // otherwise resolve\r\n    var target = this.resolver.resolveIdentifier( // reports\r\n      expression,\r\n      this.currentEnum || currentFunction\r\n    );\r\n    if (!target) return module.createUnreachable();\r\n\r\n    switch (target.kind) {\r\n      case ElementKind.LOCAL: {\r\n        let localType = (<Local>target).type;\r\n        assert(localType != Type.void);\r\n        if ((<Local>target).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Local>target, contextualType, retainConstantType);\r\n        }\r\n        let localIndex = (<Local>target).index;\r\n        assert(localIndex >= 0);\r\n        this.currentType = localType;\r\n        return this.module.createGetLocal(localIndex, localType.toNativeType());\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>target)) { // reports; not yet compiled if a static field\r\n          return this.module.createUnreachable();\r\n        }\r\n        let globalType = (<Global>target).type;\r\n        assert(globalType != Type.void);\r\n        if ((<Global>target).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Global>target, contextualType, retainConstantType);\r\n        }\r\n        this.currentType = globalType;\r\n        return this.module.createGetGlobal((<Global>target).internalName, globalType.toNativeType());\r\n      }\r\n      case ElementKind.ENUMVALUE: { // here: if referenced from within the same enum\r\n        if (!target.is(CommonFlags.COMPILED)) {\r\n          this.error(\r\n            DiagnosticCode.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums,\r\n            expression.range\r\n          );\r\n          this.currentType = Type.i32;\r\n          return this.module.createUnreachable();\r\n        }\r\n        this.currentType = Type.i32;\r\n        if ((<EnumValue>target).is(CommonFlags.INLINED)) {\r\n          return this.module.createI32((<EnumValue>target).constantValue);\r\n        }\r\n        return this.module.createGetGlobal((<EnumValue>target).internalName, NativeType.I32);\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        let instance = this.resolver.resolveFunction(\r\n          <FunctionPrototype>target,\r\n          null,\r\n          currentFunction.flow.contextualTypeArguments\r\n        );\r\n        if (!(instance && this.compileFunction(instance))) return module.createUnreachable();\r\n        let index = this.ensureFunctionTableEntry(instance);\r\n        this.currentType = instance.signature.type;\r\n        return this.module.createI32(index);\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      expression.range\r\n    );\r\n    return this.module.createUnreachable();\r\n  }\r\n\r\n  compileInstanceOfExpression(\r\n    expression: InstanceOfExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    // NOTE that this differs from TypeScript in that the rhs is a type, not an expression. at the\r\n    // time of implementation, this seemed more useful because dynamic rhs expressions are not\r\n    // possible in AS anyway.\r\n    var expr = this.compileExpressionRetainType(expression.expression, this.options.usizeType, WrapMode.NONE);\r\n    var type = this.currentType;\r\n    var isType = this.resolver.resolveType(expression.isType);\r\n    this.currentType = Type.bool;\r\n    if (!isType) return module.createUnreachable();\r\n    return type.is(TypeFlags.NULLABLE) && !isType.is(TypeFlags.NULLABLE)\r\n      ? type.nonNullableType.isAssignableTo(isType)\r\n        ? module.createBinary( // not precomputeable\r\n            type.is(TypeFlags.LONG)\r\n              ? BinaryOp.NeI64\r\n              : BinaryOp.NeI32,\r\n            expr,\r\n            type.toNativeZero(module)\r\n          )\r\n        : module.createI32(0)\r\n      : module.createI32(type.isAssignableTo(isType, true) ? 1 : 0);\r\n  }\r\n\r\n  compileLiteralExpression(\r\n    expression: LiteralExpression,\r\n    contextualType: Type,\r\n    implicitNegate: bool = false\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    switch (expression.literalKind) {\r\n      case LiteralKind.ARRAY: {\r\n        assert(!implicitNegate);\r\n        let classType = contextualType.classReference;\r\n        if (\r\n          classType &&\r\n          classType.prototype == this.program.arrayPrototype\r\n        ) {\r\n          return this.compileArrayLiteral(\r\n            assert(classType.typeArguments)[0],\r\n            (<ArrayLiteralExpression>expression).elementExpressions,\r\n            false, // TODO: isConst?\r\n            expression\r\n          );\r\n        }\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      case LiteralKind.FLOAT: {\r\n        let floatValue = (<FloatLiteralExpression>expression).value;\r\n        if (implicitNegate) {\r\n          floatValue = -floatValue;\r\n        }\r\n        if (contextualType == Type.f32) {\r\n          return module.createF32(<f32>floatValue);\r\n        }\r\n        this.currentType = Type.f64;\r\n        return module.createF64(floatValue);\r\n      }\r\n      case LiteralKind.INTEGER: {\r\n        let intValue = (<IntegerLiteralExpression>expression).value;\r\n        if (implicitNegate) {\r\n          intValue = i64_sub(\r\n            i64_new(0),\r\n            intValue\r\n          );\r\n        }\r\n        switch (contextualType.kind) {\r\n\r\n          // compile to contextualType if matching\r\n\r\n          case TypeKind.I8: {\r\n            if (i64_is_i8(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.U8: {\r\n            if (i64_is_u8(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.I16: {\r\n            if (i64_is_i16(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.U16: {\r\n            if (i64_is_u16(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.I32: {\r\n            if (i64_is_i32(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.U32: {\r\n            if (i64_is_u32(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.BOOL: {\r\n            if (i64_is_bool(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            if (!this.options.isWasm64) {\r\n              if (i64_is_i32(intValue)) return module.createI32(i64_low(intValue));\r\n              break;\r\n            }\r\n            return module.createI64(i64_low(intValue), i64_high(intValue));\r\n          }\r\n          case TypeKind.USIZE: {\r\n            if (!this.options.isWasm64) {\r\n              if (i64_is_u32(intValue)) return module.createI32(i64_low(intValue));\r\n              break;\r\n            }\r\n            return module.createI64(i64_low(intValue), i64_high(intValue));\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            return module.createI64(i64_low(intValue), i64_high(intValue));\r\n          }\r\n          case TypeKind.F32: {\r\n            if (i64_is_f32(intValue)) return module.createF32(i64_to_f32(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            if (i64_is_f64(intValue)) return module.createF64(i64_to_f64(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.VOID: {\r\n            break; // compiles to best fitting type below, being dropped\r\n          }\r\n          default: {\r\n            assert(false);\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n\r\n        // otherwise compile to best fitting native type\r\n\r\n        if (i64_is_i32(intValue)) {\r\n          this.currentType = Type.i32;\r\n          return module.createI32(i64_low(intValue));\r\n        } else if (i64_is_u32(intValue)) {\r\n          this.currentType = Type.u32;\r\n          return module.createI32(i64_low(intValue));\r\n        } else {\r\n          this.currentType = Type.i64;\r\n          return module.createI64(i64_low(intValue), i64_high(intValue));\r\n        }\r\n      }\r\n      case LiteralKind.STRING: {\r\n        assert(!implicitNegate);\r\n        return this.compileStringLiteral(<StringLiteralExpression>expression);\r\n      }\r\n      case LiteralKind.OBJECT: {\r\n        assert(!implicitNegate);\r\n        return this.compileObjectLiteral(<ObjectLiteralExpression>expression, contextualType);\r\n      }\r\n      // case LiteralKind.REGEXP:\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      expression.range\r\n    );\r\n    this.currentType = contextualType;\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  /** Ensures that the specified string exists in static memory and returns a pointer to it. */\r\n  ensureStaticString(stringValue: string): ExpressionRef {\r\n    var program = this.program;\r\n    var hasGC = program.hasGC;\r\n    var gcHeaderSize = program.gcHeaderSize;\r\n\r\n    var stringInstance = assert(program.stringInstance);\r\n    var stringSegment: MemorySegment;\r\n\r\n    // if the string already exists, reuse it\r\n    var segments = this.stringSegments;\r\n    if (segments.has(stringValue)) {\r\n      stringSegment = <MemorySegment>segments.get(stringValue);\r\n\r\n    // otherwise create it\r\n    } else {\r\n      let length = stringValue.length;\r\n      let headerSize = (stringInstance.currentMemoryOffset + 1) & ~1;\r\n      let totalSize = headerSize + length * 2;\r\n\r\n      let buf: Uint8Array;\r\n      let pos: u32;\r\n\r\n      if (hasGC) {\r\n        buf = new Uint8Array(gcHeaderSize + totalSize);\r\n        pos = gcHeaderSize;\r\n        writeI32(ensureGCHook(this, stringInstance), buf, program.gcHookOffset);\r\n      } else {\r\n        buf = new Uint8Array(totalSize);\r\n        pos = 0;\r\n      }\r\n      writeI32(length, buf, pos + stringInstance.offsetof(\"length\"));\r\n      pos += headerSize;\r\n      for (let i = 0; i < length; ++i) {\r\n        writeI16(stringValue.charCodeAt(i), buf, pos + (i << 1));\r\n      }\r\n      stringSegment = this.addMemorySegment(buf);\r\n      segments.set(stringValue, stringSegment);\r\n    }\r\n    var stringOffset = stringSegment.offset;\r\n    if (hasGC) stringOffset = i64_add(stringOffset, i64_new(gcHeaderSize));\r\n\r\n    this.currentType = stringInstance.type;\r\n    if (this.options.isWasm64) {\r\n      return this.module.createI64(i64_low(stringOffset), i64_high(stringOffset));\r\n    } else {\r\n      assert(i64_is_u32(stringOffset));\r\n      return this.module.createI32(i64_low(stringOffset));\r\n    }\r\n  }\r\n\r\n  compileStringLiteral(expression: StringLiteralExpression): ExpressionRef {\r\n    return this.ensureStaticString(expression.value);\r\n  }\r\n\r\n  /** Ensures that the specified array exists in static memory and returns a pointer to it. */\r\n  ensureStaticArray(elementType: Type, values: ExpressionRef[]): ExpressionRef {\r\n    var program = this.program;\r\n    var hasGC = program.hasGC;\r\n    var gcHeaderSize = program.gcHeaderSize;\r\n\r\n    var length = values.length;\r\n    var byteSize = elementType.byteSize;\r\n    var byteLength = length * byteSize;\r\n    var usizeTypeSize = this.options.usizeType.byteSize;\r\n\r\n    var buf: Uint8Array;\r\n    var pos: u32;\r\n\r\n    // create the backing ArrayBuffer segment\r\n    var bufferInstance = assert(program.arrayBufferInstance);\r\n    var bufferHeaderSize = (bufferInstance.currentMemoryOffset + 7) & ~7;\r\n    var bufferTotalSize = 1 << (32 - clz(bufferHeaderSize + byteLength - 1));\r\n    if (hasGC) {\r\n      buf = new Uint8Array(gcHeaderSize + bufferTotalSize);\r\n      pos = gcHeaderSize;\r\n      writeI32(ensureGCHook(this, bufferInstance), buf, program.gcHookOffset);\r\n    } else {\r\n      buf = new Uint8Array(bufferTotalSize);\r\n      pos = 0;\r\n    }\r\n    writeI32(byteLength, buf, pos + bufferInstance.offsetof(\"byteLength\"));\r\n    pos += bufferHeaderSize;\r\n    var nativeType = elementType.toNativeType();\r\n    switch (nativeType) {\r\n      case NativeType.I32: {\r\n        switch (byteSize) {\r\n          case 1: {\r\n            for (let i = 0; i < length; ++i) {\r\n              let value = values[i];\r\n              assert(getExpressionType(value) == nativeType);\r\n              assert(getExpressionId(value) == ExpressionId.Const);\r\n              writeI8(getConstValueI32(value), buf, pos);\r\n              pos += 1;\r\n            }\r\n            break;\r\n          }\r\n          case 2: {\r\n            for (let i = 0; i < length; ++i) {\r\n              let value = values[i];\r\n              assert(getExpressionType(value) == nativeType);\r\n              assert(getExpressionId(value) == ExpressionId.Const);\r\n              writeI16(getConstValueI32(value), buf, pos);\r\n              pos += 2;\r\n            }\r\n            break;\r\n          }\r\n          case 4: {\r\n            for (let i = 0; i < length; ++i) {\r\n              let value = values[i];\r\n              assert(getExpressionType(value) == nativeType);\r\n              assert(getExpressionId(value) == ExpressionId.Const);\r\n              writeI32(getConstValueI32(value), buf, pos);\r\n              pos += 4;\r\n            }\r\n            break;\r\n          }\r\n          default: assert(false);\r\n        }\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        for (let i = 0; i < length; ++i) {\r\n          let value = values[i];\r\n          assert(getExpressionType(value) == nativeType);\r\n          assert(getExpressionId(value) == ExpressionId.Const);\r\n          writeI64(i64_new(getConstValueI64Low(value), getConstValueI64High(value)), buf, pos);\r\n          pos += 8;\r\n        }\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        for (let i = 0; i < length; ++i) {\r\n          let value = values[i];\r\n          assert(getExpressionType(value) == nativeType);\r\n          assert(getExpressionId(value) == ExpressionId.Const);\r\n          writeF32(getConstValueF32(value), buf, pos);\r\n          pos += 4;\r\n        }\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        for (let i = 0; i < length; ++i) {\r\n          let value = values[i];\r\n          assert(getExpressionType(value) == nativeType);\r\n          assert(getExpressionId(value) == ExpressionId.Const);\r\n          writeF64(getConstValueF64(value), buf, pos);\r\n          pos += 8;\r\n        }\r\n        break;\r\n      }\r\n      default: assert(false);\r\n    }\r\n    var bufferSegment = this.addMemorySegment(buf);\r\n    var bufferOffset = bufferSegment.offset;\r\n    if (hasGC) bufferOffset = i64_add(bufferOffset, i64_new(gcHeaderSize));\r\n\r\n    // create the Array segment and return a pointer to it\r\n    var arrayPrototype = assert(program.arrayPrototype);\r\n    var arrayInstance = assert(this.resolver.resolveClass(arrayPrototype, [ elementType ]));\r\n    var arrayHeaderSize = (arrayInstance.currentMemoryOffset + 7) & ~7;\r\n    if (hasGC) {\r\n      buf = new Uint8Array(gcHeaderSize + arrayHeaderSize);\r\n      pos = gcHeaderSize;\r\n      writeI32(ensureGCHook(this, arrayInstance), buf, program.gcHookOffset);\r\n    } else {\r\n      buf = new Uint8Array(arrayHeaderSize);\r\n      pos = 0;\r\n    }\r\n    var arraySegment = this.addMemorySegment(buf);\r\n    var arrayOffset = arraySegment.offset;\r\n    if (hasGC) arrayOffset = i64_add(arrayOffset, i64_new(gcHeaderSize));\r\n    this.currentType = arrayInstance.type;\r\n    if (usizeTypeSize == 8) {\r\n      writeI64(bufferOffset, buf, pos + arrayInstance.offsetof(\"buffer_\"));\r\n      writeI32(length, buf, pos + arrayInstance.offsetof(\"length_\"));\r\n      return this.module.createI64(i64_low(arrayOffset), i64_high(arrayOffset));\r\n    } else {\r\n      assert(i64_is_u32(bufferOffset));\r\n      writeI32(i64_low(bufferOffset), buf, pos + arrayInstance.offsetof(\"buffer_\"));\r\n      writeI32(length, buf, pos + arrayInstance.offsetof(\"length_\"));\r\n      assert(i64_is_u32(arrayOffset));\r\n      return this.module.createI32(i64_low(arrayOffset));\r\n    }\r\n  }\r\n\r\n  compileArrayLiteral(\r\n    elementType: Type,\r\n    expressions: (Expression | null)[],\r\n    isConst: bool,\r\n    reportNode: Node\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    // find out whether all elements are constant (array is static)\r\n    var length = expressions.length;\r\n    var compiledValues = new Array<ExpressionRef>(length);\r\n    var constantValues = new Array<ExpressionRef>(length);\r\n    var nativeElementType = elementType.toNativeType();\r\n    var isStatic = true;\r\n    for (let i = 0; i < length; ++i) {\r\n      let expr = expressions[i]\r\n        ? this.compileExpression(<Expression>expressions[i], elementType, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n        : elementType.toNativeZero(module);\r\n      compiledValues[i] = expr;\r\n      if (isStatic) {\r\n        expr = module.precomputeExpression(compiledValues[i]);\r\n        if (getExpressionId(expr) == ExpressionId.Const) {\r\n          assert(getExpressionType(expr) == nativeElementType);\r\n          constantValues[i] = expr;\r\n        } else {\r\n          if (isConst) {\r\n            this.warning(\r\n              DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n              reportNode.range\r\n            );\r\n          }\r\n          isStatic = false;\r\n        }\r\n      }\r\n    }\r\n\r\n    // make a static array if possible\r\n    if (isStatic) return this.ensureStaticArray(elementType, constantValues);\r\n\r\n    // otherwise obtain the array type\r\n    var arrayPrototype = assert(this.program.arrayPrototype);\r\n    if (!arrayPrototype || arrayPrototype.kind != ElementKind.CLASS_PROTOTYPE) return module.createUnreachable();\r\n    var arrayInstance = this.resolver.resolveClass(<ClassPrototype>arrayPrototype, [ elementType ]);\r\n    if (!arrayInstance) return module.createUnreachable();\r\n    var arrayType = arrayInstance.type;\r\n\r\n    // and compile an explicit instantiation\r\n    this.currentType = arrayType;\r\n    var setter = arrayInstance.lookupOverload(OperatorKind.INDEXED_SET, true);\r\n    if (!setter) {\r\n      this.error(\r\n        DiagnosticCode.Index_signature_in_type_0_only_permits_reading,\r\n        reportNode.range, arrayInstance.internalName\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    var nativeArrayType = arrayType.toNativeType();\r\n    var currentFunction = this.currentFunction;\r\n    var tempLocal = currentFunction.getTempLocal(arrayType, false);\r\n    var stmts = new Array<ExpressionRef>(2 + length);\r\n    var index = 0;\r\n    stmts[index++] = module.createSetLocal(tempLocal.index,\r\n      this.makeCallDirect(assert(arrayInstance.constructorInstance), [\r\n        module.createI32(0), // this\r\n        module.createI32(length)\r\n      ])\r\n    );\r\n    for (let i = 0; i < length; ++i) {\r\n      stmts[index++] = this.makeCallDirect(setter, [\r\n        module.createGetLocal(tempLocal.index, nativeArrayType), // this\r\n        module.createI32(i),\r\n        compiledValues[i]\r\n      ]);\r\n    }\r\n    assert(index + 1 == stmts.length);\r\n    stmts[index] = module.createGetLocal(tempLocal.index, nativeArrayType);\r\n    currentFunction.freeTempLocal(tempLocal);\r\n    this.currentType = arrayType;\r\n    return module.createBlock(null, stmts, nativeArrayType);\r\n  }\r\n\r\n  compileObjectLiteral(expression: ObjectLiteralExpression, contextualType: Type): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    // contextual type must be a class\r\n    var classReference = contextualType.classReference;\r\n    if (!classReference || classReference.is(CommonFlags.ABSTRACT)) {\r\n      this.error(\r\n        DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n        expression.range, \"<object>\", contextualType.toString()\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n\r\n    // if present, check that the constructor is compatible with object literals\r\n    var ctor = classReference.constructorInstance;\r\n    if (ctor) {\r\n      if (ctor.signature.requiredParameters) {\r\n        this.error(\r\n          DiagnosticCode.Constructor_of_class_0_must_not_require_any_arguments,\r\n          expression.range, classReference.toString()\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (ctor.is(CommonFlags.PRIVATE)) {\r\n        this.error(\r\n          DiagnosticCode.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration,\r\n          expression.range, classReference.toString()\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (ctor.is(CommonFlags.PROTECTED)) {\r\n        this.error(\r\n          DiagnosticCode.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration,\r\n          expression.range, classReference.toString()\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // check and compile field values\r\n    var names = expression.names;\r\n    var numNames = names.length;\r\n    var values = expression.values;\r\n    var members = classReference.members;\r\n    var hasErrors = false;\r\n    var exprs = new Array<ExpressionRef>(numNames + 2);\r\n    var tempLocal = this.currentFunction.getTempLocal(this.options.usizeType);\r\n    assert(numNames == values.length);\r\n    for (let i = 0, k = numNames; i < k; ++i) {\r\n      let member = members ? members.get(names[i].text) : null;\r\n      if (!member || member.kind != ElementKind.FIELD) {\r\n        this.error(\r\n          DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n          names[i].range, names[i].text, classReference.toString()\r\n        );\r\n        hasErrors = true;\r\n        continue;\r\n      }\r\n      let type = (<Field>member).type;\r\n      exprs[i + 1] = this.module.createStore( // TODO: handle setters as well\r\n        type.byteSize,\r\n        this.module.createGetLocal(tempLocal.index, this.options.nativeSizeType),\r\n        this.compileExpression(values[i], (<Field>member).type, ConversionKind.IMPLICIT, WrapMode.NONE),\r\n        type.toNativeType(),\r\n        (<Field>member).memoryOffset\r\n      );\r\n    }\r\n    this.currentType = classReference.type.nonNullableType;\r\n    if (hasErrors) return module.createUnreachable();\r\n\r\n    // allocate a new instance first and assign 'this' to the temp. local\r\n    exprs[0] = module.createSetLocal(\r\n      tempLocal.index,\r\n      compileAllocate(this, classReference, expression)\r\n    );\r\n\r\n    // once all field values have been set, return 'this'\r\n    exprs[exprs.length - 1] = module.createGetLocal(tempLocal.index, this.options.nativeSizeType);\r\n\r\n    return module.createBlock(null, exprs, this.options.nativeSizeType);\r\n  }\r\n\r\n  compileNewExpression(expression: NewExpression, contextualType: Type): ExpressionRef {\r\n    var module = this.module;\r\n    var options = this.options;\r\n    var currentFunction = this.currentFunction;\r\n\r\n    // obtain the class being instantiated\r\n    var target = this.resolver.resolveExpression( // reports\r\n      expression.expression,\r\n      currentFunction\r\n    );\r\n    if (!target) return module.createUnreachable();\r\n    if (target.kind != ElementKind.CLASS_PROTOTYPE) {\r\n      this.error(\r\n        DiagnosticCode.Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature,\r\n        expression.expression.range\r\n      );\r\n      return this.module.createUnreachable();\r\n    }\r\n    var classPrototype = <ClassPrototype>target;\r\n    var classInstance: Class | null = null;\r\n    var typeArguments = expression.typeArguments;\r\n    var classReference: Class | null;\r\n    if (\r\n      !typeArguments &&\r\n      (classReference = contextualType.classReference) !== null &&\r\n      classReference.is(CommonFlags.GENERIC)\r\n    ) {\r\n      classInstance = this.resolver.resolveClass(\r\n        classPrototype,\r\n        classReference.typeArguments,\r\n        currentFunction.flow.contextualTypeArguments\r\n      );\r\n    } else {\r\n      classInstance = this.resolver.resolveClassInclTypeArguments(\r\n        classPrototype,\r\n        typeArguments,\r\n        currentFunction.flow.contextualTypeArguments,\r\n        expression\r\n      );\r\n    }\r\n    if (!classInstance) return module.createUnreachable();\r\n\r\n    var expr: ExpressionRef;\r\n\r\n    // traverse to the top-most visible constructor\r\n    var currentClassInstance: Class | null = classInstance;\r\n    var constructorInstance: Function | null = null;\r\n    do {\r\n      constructorInstance = currentClassInstance.constructorInstance;\r\n      if (constructorInstance) break; // TODO: check visibility\r\n    } while (currentClassInstance = currentClassInstance.base);\r\n\r\n    // if a constructor is present, call it with a zero `this`\r\n    if (constructorInstance) {\r\n      expr = this.compileCallDirect(constructorInstance, expression.arguments, expression,\r\n        options.usizeType.toNativeZero(module)\r\n      );\r\n\r\n    // otherwise simply allocate a new instance and initialize its fields\r\n    } else {\r\n      expr = this.makeAllocate(classInstance, expression);\r\n    }\r\n\r\n    this.currentType = classInstance.type;\r\n    return expr;\r\n  }\r\n\r\n  compileParenthesizedExpression(\r\n    expression: ParenthesizedExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    // does not change types, just order\r\n    return this.compileExpression(\r\n      expression.expression,\r\n      contextualType,\r\n      ConversionKind.NONE,\r\n      WrapMode.NONE\r\n    );\r\n  }\r\n\r\n  /**\r\n   * Compiles a property access in the specified context.\r\n   * @param retainConstantType Retains the type of inlined constants if `true`, otherwise\r\n   *  precomputes them according to context.\r\n   */\r\n  compilePropertyAccessExpression(\r\n    propertyAccess: PropertyAccessExpression,\r\n    contextualType: Type,\r\n    retainConstantType: bool\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    var target = this.resolver.resolvePropertyAccess(propertyAccess, this.currentFunction); // reports\r\n    if (!target) return module.createUnreachable();\r\n\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL: { // static property\r\n        if (!this.compileGlobal(<Global>target)) { // reports; not yet compiled if a static field\r\n          return module.createUnreachable();\r\n        }\r\n        let globalType = (<Global>target).type;\r\n        assert(globalType != Type.void);\r\n        if ((<Global>target).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Global>target, contextualType, retainConstantType);\r\n        }\r\n        this.currentType = globalType;\r\n        return module.createGetGlobal((<Global>target).internalName, globalType.toNativeType());\r\n      }\r\n      case ElementKind.ENUMVALUE: { // enum value\r\n        let parent = (<EnumValue>target).parent;\r\n        assert(parent !== null && parent.kind == ElementKind.ENUM);\r\n        if (!this.compileEnum(<Enum>parent)) {\r\n          this.currentType = Type.i32;\r\n          return this.module.createUnreachable();\r\n        }\r\n        this.currentType = Type.i32;\r\n        if ((<EnumValue>target).is(CommonFlags.INLINED)) {\r\n          return module.createI32((<EnumValue>target).constantValue);\r\n        }\r\n        return module.createGetGlobal((<EnumValue>target).internalName, NativeType.I32);\r\n      }\r\n      case ElementKind.FIELD: { // instance field\r\n        let thisExpression = assert(this.resolver.currentThisExpression);\r\n        assert((<Field>target).memoryOffset >= 0);\r\n        let thisExpr = this.compileExpressionRetainType(\r\n          thisExpression,\r\n          this.options.usizeType,\r\n          WrapMode.NONE\r\n        );\r\n        this.currentType = (<Field>target).type;\r\n        return module.createLoad(\r\n          (<Field>target).type.byteSize,\r\n          (<Field>target).type.is(TypeFlags.SIGNED | TypeFlags.INTEGER),\r\n          thisExpr,\r\n          (<Field>target).type.toNativeType(),\r\n          (<Field>target).memoryOffset\r\n        );\r\n      }\r\n      case ElementKind.PROPERTY: {// instance property (here: getter)\r\n        return this.compileGetter(<Property>target, propertyAccess);\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        this.error(\r\n          DiagnosticCode.Cannot_access_method_0_without_calling_it_as_it_requires_this_to_be_set,\r\n          propertyAccess.range, (<FunctionPrototype>target).simpleName\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      propertyAccess.range\r\n    );\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  private compileGetter(target: Property, reportNode: Node): ExpressionRef {\r\n    var prototype = target.getterPrototype;\r\n    if (prototype) {\r\n      let instance = this.resolver.resolveFunction(prototype, null);\r\n      if (!instance) return this.module.createUnreachable();\r\n      let signature = instance.signature;\r\n      if (!this.checkCallSignature( // reports\r\n        signature,\r\n        0,\r\n        instance.is(CommonFlags.INSTANCE),\r\n        reportNode\r\n      )) {\r\n        return this.module.createUnreachable();\r\n      }\r\n      let inline = (instance.decoratorFlags & DecoratorFlags.INLINE) != 0;\r\n      if (instance.is(CommonFlags.INSTANCE)) {\r\n        let parent = assert(instance.parent);\r\n        assert(parent.kind == ElementKind.CLASS);\r\n        let thisExpression = assert(this.resolver.currentThisExpression); //!!!\r\n        let thisExpr = this.compileExpressionRetainType(\r\n          thisExpression,\r\n          this.options.usizeType,\r\n          WrapMode.NONE\r\n        );\r\n        this.currentType = signature.returnType;\r\n        return this.compileCallDirect(instance, [], reportNode, thisExpr, inline);\r\n      } else {\r\n        this.currentType = signature.returnType;\r\n        return this.compileCallDirect(instance, [], reportNode, 0, inline);\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n        reportNode.range, (<Property>target).simpleName, (<Property>target).parent.toString()\r\n      );\r\n      return this.module.createUnreachable();\r\n    }\r\n  }\r\n\r\n  compileTernaryExpression(expression: TernaryExpression, contextualType: Type): ExpressionRef {\r\n    var ifThen = expression.ifThen;\r\n    var ifElse = expression.ifElse;\r\n    var currentFunction = this.currentFunction;\r\n    var parentFlow = currentFunction.flow;\r\n\r\n    var condExpr = this.makeIsTrueish(\r\n      this.compileExpressionRetainType(expression.condition, Type.bool, WrapMode.NONE),\r\n      this.currentType\r\n    );\r\n\r\n    if (\r\n      !this.options.noTreeShaking ||\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT)\r\n    ) {\r\n      // Try to eliminate unnecesssary branches if the condition is constant\r\n      let condExprPrecomp = this.module.precomputeExpression(condExpr);\r\n      if (\r\n        getExpressionId(condExprPrecomp) == ExpressionId.Const &&\r\n        getExpressionType(condExprPrecomp) == NativeType.I32\r\n      ) {\r\n        return getConstValueI32(condExprPrecomp)\r\n          ? this.compileExpressionRetainType(ifThen, contextualType, WrapMode.NONE)\r\n          : this.compileExpressionRetainType(ifElse, contextualType, WrapMode.NONE);\r\n\r\n      // Otherwise recompile to the original and let the optimizer decide\r\n      } else /* if (condExpr != condExprPrecomp) <- not guaranteed */ {\r\n        condExpr = this.makeIsTrueish(\r\n          this.compileExpressionRetainType(expression.condition, Type.bool, WrapMode.NONE),\r\n          this.currentType\r\n        );\r\n      }\r\n    }\r\n\r\n    var ifThenFlow = parentFlow.fork();\r\n    currentFunction.flow = ifThenFlow;\r\n    var ifThenExpr = this.compileExpressionRetainType(ifThen, contextualType, WrapMode.NONE);\r\n    var ifThenType = this.currentType;\r\n    ifThenFlow.free();\r\n\r\n    var ifElseFlow = parentFlow.fork();\r\n    currentFunction.flow = ifElseFlow;\r\n    var ifElseExpr = this.compileExpressionRetainType(ifElse, contextualType, WrapMode.NONE);\r\n    var ifElseType = this.currentType;\r\n    currentFunction.flow = ifElseFlow.free();\r\n\r\n    parentFlow.inheritMutual(ifThenFlow, ifElseFlow);\r\n\r\n    var commonType = Type.commonCompatible(ifThenType, ifElseType, false);\r\n    if (!commonType) {\r\n      this.error(\r\n        DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n        expression.range, ifThenType.toString(), ifElseType.toString()\r\n      );\r\n      this.currentType = contextualType;\r\n      return this.module.createUnreachable();\r\n    }\r\n    ifThenExpr = this.convertExpression(\r\n      ifThenExpr,\r\n      ifThenType,\r\n      commonType,\r\n      ConversionKind.IMPLICIT,\r\n      WrapMode.NONE,\r\n      ifThen\r\n    );\r\n    ifElseExpr = this.convertExpression(\r\n      ifElseExpr,\r\n      ifElseType,\r\n      commonType,\r\n      ConversionKind.IMPLICIT,\r\n      WrapMode.NONE,\r\n      ifElse\r\n    );\r\n    this.currentType = commonType;\r\n    return this.module.createIf(condExpr, ifThenExpr, ifElseExpr);\r\n  }\r\n\r\n  compileUnaryPostfixExpression(expression: UnaryPostfixExpression, contextualType: Type): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n\r\n    // make a getter for the expression (also obtains the type)\r\n    var getValue = this.compileExpression( // reports\r\n      expression.operand,\r\n      contextualType == Type.void\r\n        ? Type.i32\r\n        : contextualType,\r\n      ConversionKind.NONE,\r\n      WrapMode.NONE\r\n    );\r\n    // shortcut if compiling the getter already failed\r\n    if (getExpressionId(getValue) == ExpressionId.Unreachable) return getValue;\r\n    var currentType = this.currentType;\r\n\r\n    var op: BinaryOp;\r\n    var nativeType: NativeType;\r\n    var nativeOne: ExpressionRef;\r\n\r\n    switch (expression.operator) {\r\n      case Token.PLUS_PLUS: {\r\n\r\n        // TODO: check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        switch (currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            op = BinaryOp.AddI32;\r\n            nativeType = NativeType.I32;\r\n            nativeOne = module.createI32(1);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: // TODO: check operator overload\r\n          case TypeKind.ISIZE: {\r\n            let options = this.options;\r\n            op = options.isWasm64\r\n              ? BinaryOp.AddI64\r\n              : BinaryOp.AddI32;\r\n            nativeType = options.nativeSizeType;\r\n            nativeOne = currentType.toNativeOne(module);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            op = BinaryOp.AddI64;\r\n            nativeType = NativeType.I64;\r\n            nativeOne = module.createI64(1);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            op = BinaryOp.AddF32;\r\n            nativeType = NativeType.F32;\r\n            nativeOne = module.createF32(1);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            op = BinaryOp.AddF64;\r\n            nativeType = NativeType.F64;\r\n            nativeOne = module.createF64(1);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.MINUS_MINUS: {\r\n\r\n        // TODO: check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        switch (currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            op = BinaryOp.SubI32;\r\n            nativeType = NativeType.I32;\r\n            nativeOne = module.createI32(1);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: // TODO: check operator overload\r\n          case TypeKind.ISIZE: {\r\n            let options = this.options;\r\n            op = options.isWasm64\r\n              ? BinaryOp.SubI64\r\n              : BinaryOp.SubI32;\r\n            nativeType = options.nativeSizeType;\r\n            nativeOne = currentType.toNativeOne(module);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            op = BinaryOp.SubI64;\r\n            nativeType = NativeType.I64;\r\n            nativeOne = module.createI64(1);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            op = BinaryOp.SubF32;\r\n            nativeType = NativeType.F32;\r\n            nativeOne = module.createF32(1);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            op = BinaryOp.SubF64;\r\n            nativeType = NativeType.F64;\r\n            nativeOne = module.createF64(1);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // simplify if dropped anyway\r\n    if (contextualType == Type.void) {\r\n      return this.compileAssignmentWithValue(expression.operand,\r\n        module.createBinary(op,\r\n          getValue,\r\n          nativeOne\r\n        ),\r\n        false\r\n      );\r\n    }\r\n\r\n    // otherwise use a temp local for the intermediate value (always possibly overflows)\r\n    var tempLocal = currentFunction.getTempLocal(currentType, false);\r\n    var setValue = this.compileAssignmentWithValue(expression.operand,\r\n      module.createBinary(op,\r\n        this.module.createGetLocal(tempLocal.index, nativeType),\r\n        nativeOne\r\n      ),\r\n      false\r\n    );\r\n    this.currentType = assert(tempLocal).type;\r\n    currentFunction.freeTempLocal(<Local>tempLocal);\r\n\r\n    var localIndex = (<Local>tempLocal).index;\r\n    return module.createBlock(null, [\r\n      module.createSetLocal(localIndex, getValue),\r\n      setValue,\r\n      module.createGetLocal(localIndex, nativeType)\r\n    ], nativeType); // result of 'x++' / 'x--' might overflow\r\n  }\r\n\r\n  compileUnaryPrefixExpression(\r\n    expression: UnaryPrefixExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var compound = false;\r\n    var expr: ExpressionRef;\r\n\r\n    switch (expression.operator) {\r\n      case Token.PLUS: {\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.PLUS);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n\r\n        // nop\r\n        break;\r\n      }\r\n      case Token.MINUS: {\r\n        if (expression.operand.kind == NodeKind.LITERAL && (\r\n          (<LiteralExpression>expression.operand).literalKind == LiteralKind.INTEGER ||\r\n          (<LiteralExpression>expression.operand).literalKind == LiteralKind.FLOAT\r\n        )) {\r\n          // implicitly negate integer and float literals. also enables proper checking of literal ranges.\r\n          expr = this.compileLiteralExpression(<LiteralExpression>expression.operand, contextualType, true);\r\n          // compileExpression normally does this:\r\n          if (this.options.sourceMap) this.addDebugLocation(expr, expression.range);\r\n          break;\r\n        }\r\n\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.MINUS);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.SubI32, module.createI32(0), expr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.SubI64\r\n                : BinaryOp.SubI32,\r\n              this.currentType.toNativeZero(module),\r\n              expr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.SubI64, module.createI64(0), expr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createUnary(UnaryOp.NegF32, expr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createUnary(UnaryOp.NegF64, expr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.PLUS_PLUS: {\r\n        compound = true;\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.PREFIX_INC);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.AddI32, expr, this.module.createI32(1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.AddI64\r\n                : BinaryOp.AddI32,\r\n              expr,\r\n              this.currentType.toNativeOne(module)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.AddI64, expr, module.createI64(1));\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.AddF32, expr, module.createF32(1));\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.AddF64, expr, module.createF64(1));\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.MINUS_MINUS: {\r\n        compound = true;\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.PREFIX_DEC);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.SubI32, expr, module.createI32(1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.SubI64\r\n                : BinaryOp.SubI32,\r\n              expr,\r\n              this.currentType.toNativeOne(module)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.SubI64, expr, module.createI64(1));\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.SubF32, expr, module.createF32(1));\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.SubF64, expr, module.createF64(1));\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.EXCLAMATION: {\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.NOT);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          // allow '!' for references even without an overload\r\n        }\r\n\r\n        expr = this.makeIsFalseish(expr, this.currentType);\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.TILDE: {\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType.is(TypeFlags.FLOAT)\r\n              ? Type.i64\r\n              : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_NOT);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        } else {\r\n          expr = this.convertExpression(\r\n            expr,\r\n            this.currentType, this.currentType.intType,\r\n            ConversionKind.IMPLICIT, WrapMode.NONE,\r\n            expression.operand\r\n          );\r\n        }\r\n\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.XorI32, expr, module.createI32(-1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.XorI64\r\n                : BinaryOp.XorI32,\r\n              expr,\r\n              this.currentType.toNativeNegOne(module)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.XorI64, expr, module.createI64(-1, -1));\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.TYPEOF: {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n    return compound\r\n      ? this.compileAssignmentWithValue(expression.operand, expr, contextualType != Type.void)\r\n      : expr;\r\n  }\r\n\r\n  /** Makes sure that a 32-bit integer value is wrapped to a valid value of the specified type. */\r\n  ensureSmallIntegerWrap(expr: ExpressionRef, type: Type): ExpressionRef {\r\n    var module = this.module;\r\n    var flow = this.currentFunction.flow;\r\n    switch (type.kind) {\r\n      case TypeKind.I8: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = this.options.hasFeature(Feature.SIGN_EXTENSION)\r\n            ? module.createUnary(UnaryOp.ExtendI8ToI32, expr)\r\n            : module.createBinary(BinaryOp.ShrI32,\r\n                module.createBinary(BinaryOp.ShlI32,\r\n                  expr,\r\n                  module.createI32(24)\r\n                ),\r\n                module.createI32(24)\r\n              );\r\n        }\r\n        break;\r\n      }\r\n      case TypeKind.I16: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = this.options.hasFeature(Feature.SIGN_EXTENSION)\r\n            ? module.createUnary(UnaryOp.ExtendI16ToI32, expr)\r\n            : module.createBinary(BinaryOp.ShrI32,\r\n                module.createBinary(BinaryOp.ShlI32,\r\n                  expr,\r\n                  module.createI32(16)\r\n                ),\r\n                module.createI32(16)\r\n              );\r\n        }\r\n        break;\r\n      }\r\n      case TypeKind.U8: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = module.createBinary(BinaryOp.AndI32,\r\n            expr,\r\n            module.createI32(0xff)\r\n          );\r\n        }\r\n        break;\r\n      }\r\n      case TypeKind.U16: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = module.createBinary(BinaryOp.AndI32,\r\n            expr,\r\n            module.createI32(0xffff)\r\n          );\r\n        }\r\n        break;\r\n      }\r\n      case TypeKind.BOOL: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = module.createBinary(BinaryOp.AndI32,\r\n            expr,\r\n            module.createI32(0x1)\r\n          );\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  /** Creates a comparison whether an expression is 'false' in a broader sense. */\r\n  makeIsFalseish(expr: ExpressionRef, type: Type): ExpressionRef {\r\n    var module = this.module;\r\n    switch (type.kind) {\r\n      case TypeKind.I8:\r\n      case TypeKind.I16:\r\n      case TypeKind.U8:\r\n      case TypeKind.U16:\r\n      case TypeKind.BOOL: {\r\n        expr = this.ensureSmallIntegerWrap(expr, type);\r\n        // fall-through\r\n      }\r\n      case TypeKind.I32:\r\n      case TypeKind.U32: {\r\n        return module.createUnary(UnaryOp.EqzI32, expr);\r\n      }\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: {\r\n        return module.createUnary(UnaryOp.EqzI64, expr);\r\n      }\r\n      case TypeKind.USIZE: // TODO: strings?\r\n      case TypeKind.ISIZE: {\r\n        return module.createUnary(type.size == 64 ? UnaryOp.EqzI64 : UnaryOp.EqzI32, expr);\r\n      }\r\n      case TypeKind.F32: {\r\n        return module.createBinary(BinaryOp.EqF32, expr, module.createF32(0));\r\n      }\r\n      case TypeKind.F64: {\r\n        return module.createBinary(BinaryOp.EqF64, expr, module.createF64(0));\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return module.createI32(1);\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Creates a comparison whether an expression is 'true' in a broader sense. */\r\n  makeIsTrueish(expr: ExpressionRef, type: Type): ExpressionRef {\r\n    var module = this.module;\r\n    switch (type.kind) {\r\n      case TypeKind.I8:\r\n      case TypeKind.I16:\r\n      case TypeKind.U8:\r\n      case TypeKind.U16:\r\n      case TypeKind.BOOL: {\r\n        expr = this.ensureSmallIntegerWrap(expr, type);\r\n        // fall-through\r\n      }\r\n      case TypeKind.I32:\r\n      case TypeKind.U32: {\r\n        return expr;\r\n      }\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: {\r\n        return module.createBinary(BinaryOp.NeI64, expr, module.createI64(0));\r\n      }\r\n      case TypeKind.USIZE: // TODO: strings?\r\n      case TypeKind.ISIZE: {\r\n        return type.size == 64\r\n          ? module.createBinary(BinaryOp.NeI64, expr, module.createI64(0))\r\n          : expr;\r\n      }\r\n      case TypeKind.F32: {\r\n        return module.createBinary(BinaryOp.NeF32, expr, module.createF32(0));\r\n      }\r\n      case TypeKind.F64: {\r\n        return module.createBinary(BinaryOp.NeF64, expr, module.createF64(0));\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return module.createI32(0);\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Makes an allocation expression for an instance of the specified class. */\r\n  makeAllocate(classInstance: Class, reportNode: Node): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n    var nativeSizeType = this.options.nativeSizeType;\r\n\r\n    // allocate the necessary memory and tee the pointer to a temp. local for reuse\r\n    var tempLocal = currentFunction.getTempLocal(classInstance.type, false);\r\n    var initializers = new Array<ExpressionRef>();\r\n    initializers.push(\r\n      module.createSetLocal(tempLocal.index,\r\n        compileAllocate(this, classInstance, reportNode)\r\n      )\r\n    );\r\n\r\n    // apply field initializers\r\n    if (classInstance.members) {\r\n      for (let member of classInstance.members.values()) {\r\n        if (member.kind == ElementKind.FIELD) {\r\n          let field = <Field>member;\r\n          let fieldType = field.type;\r\n          let nativeFieldType = fieldType.toNativeType();\r\n          let fieldDeclaration = field.prototype.declaration;\r\n          assert(!field.isAny(CommonFlags.CONST));\r\n          if (fieldDeclaration.initializer) { // use initializer\r\n            initializers.push(module.createStore(fieldType.byteSize,\r\n              module.createGetLocal(tempLocal.index, nativeSizeType),\r\n              this.compileExpression( // reports\r\n                fieldDeclaration.initializer,\r\n                fieldType,\r\n                ConversionKind.IMPLICIT,\r\n                WrapMode.NONE\r\n              ),\r\n              nativeFieldType,\r\n              field.memoryOffset\r\n            ));\r\n          } else { // initialize with zero\r\n            // TODO: might be unnecessary if the ctor initializes the field\r\n            let parameterIndex = (<FieldDeclaration>field.prototype.declaration).parameterIndex;\r\n            initializers.push(module.createStore(fieldType.byteSize,\r\n              module.createGetLocal(tempLocal.index, nativeSizeType),\r\n              parameterIndex >= 0 // initialized via parameter\r\n                ? module.createGetLocal(1 + parameterIndex, nativeFieldType)\r\n                : fieldType.toNativeZero(module),\r\n                nativeFieldType,\r\n              field.memoryOffset\r\n            ));\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    // return `this`\r\n    initializers.push(\r\n      module.createGetLocal(tempLocal.index, nativeSizeType)\r\n    );\r\n\r\n    currentFunction.freeTempLocal(tempLocal);\r\n    this.currentType = classInstance.type;\r\n    return module.createBlock(null, initializers, nativeSizeType);\r\n  }\r\n\r\n  /** Makes a conditional allocation expression inside of the constructor of the specified class. */\r\n  makeConditionalAllocate(classInstance: Class, reportNode: Node): ExpressionRef {\r\n    // requires that `this` is the first local\r\n    var module = this.module;\r\n    var nativeSizeType = this.options.nativeSizeType;\r\n    this.currentType = classInstance.type;\r\n    return module.createIf(\r\n      nativeSizeType == NativeType.I64\r\n        ? module.createBinary(\r\n            BinaryOp.NeI64,\r\n            module.createGetLocal(0, NativeType.I64),\r\n            module.createI64(0)\r\n          )\r\n        : module.createGetLocal(0, NativeType.I32),\r\n      module.createGetLocal(0, nativeSizeType),\r\n      module.createTeeLocal(0,\r\n        this.makeAllocate(classInstance, reportNode)\r\n      )\r\n    );\r\n  }\r\n\r\n  /** Adds the debug location of the specified expression at the specified range to the source map. */\r\n  addDebugLocation(expr: ExpressionRef, range: Range): void {\r\n    var currentFunction = this.currentFunction;\r\n    var source = range.source;\r\n    if (source.debugInfoIndex < 0) source.debugInfoIndex = this.module.addDebugInfoFile(source.normalizedPath);\r\n    range.debugInfoRef = expr;\r\n    currentFunction.debugLocations.push(range);\r\n  }\r\n}\r\n\r\n// helpers\r\n\r\nfunction mangleImportName(\r\n  element: Element,\r\n  declaration: DeclarationStatement,\r\n  parentElement: Element | null = null\r\n): void {\r\n  mangleImportName_moduleName = parentElement ? parentElement.simpleName : declaration.range.source.simplePath;\r\n  mangleImportName_elementName = element.simpleName;\r\n\r\n  if (!element.hasDecorator(DecoratorFlags.EXTERNAL)) return;\r\n\r\n  var program = element.program;\r\n  var decorator = assert(findDecorator(DecoratorKind.EXTERNAL, declaration.decorators));\r\n  var args = decorator.arguments;\r\n  if (args && args.length) {\r\n    let arg = args[0];\r\n    if (arg.kind == NodeKind.LITERAL && (<LiteralExpression>arg).literalKind == LiteralKind.STRING) {\r\n      mangleImportName_elementName = (<StringLiteralExpression>arg).value;\r\n      if (args.length >= 2) {\r\n        arg = args[1];\r\n        if (arg.kind == NodeKind.LITERAL && (<LiteralExpression>arg).literalKind == LiteralKind.STRING) {\r\n          mangleImportName_moduleName = mangleImportName_elementName;\r\n          mangleImportName_elementName = (<StringLiteralExpression>arg).value;\r\n          if (args.length > 2) {\r\n            program.error(\r\n              DiagnosticCode.Expected_0_arguments_but_got_1,\r\n              decorator.range, \"2\", args.length.toString()\r\n            );\r\n          }\r\n        } else {\r\n          program.error(\r\n            DiagnosticCode.String_literal_expected,\r\n            arg.range\r\n          );\r\n        }\r\n      }\r\n    } else {\r\n      program.error(\r\n        DiagnosticCode.String_literal_expected,\r\n        arg.range\r\n      );\r\n    }\r\n  } else {\r\n    program.error(\r\n      DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n      decorator.range, \"1\", \"0\"\r\n    );\r\n  }\r\n}\r\n\r\nvar mangleImportName_moduleName: string;\r\nvar mangleImportName_elementName: string;\r\n","/**\r\n * Generated from diagnosticsMessages.json. Do not edit.\r\n * @module diagnostics\r\n *//***/\r\n\r\n/* tslint:disable:max-line-length */\r\n\r\n/** Enum of available diagnostic codes. */\r\nexport enum DiagnosticCode {\r\n  Operation_not_supported = 100,\r\n  Operation_is_unsafe = 101,\r\n  User_defined_0 = 102,\r\n  Conversion_from_type_0_to_1_requires_an_explicit_cast = 200,\r\n  Conversion_from_type_0_to_1_will_require_an_explicit_cast_when_switching_between_32_64_bit = 201,\r\n  Type_0_cannot_be_changed_to_type_1 = 202,\r\n  Type_0_cannot_be_reinterpreted_as_type_1 = 203,\r\n  Basic_type_0_cannot_be_nullable = 204,\r\n  Cannot_export_a_mutable_global = 205,\r\n  Compiling_constant_with_non_constant_initializer_as_mutable = 206,\r\n  Unmanaged_classes_cannot_extend_managed_classes_and_vice_versa = 207,\r\n  Unmanaged_classes_cannot_implement_interfaces = 208,\r\n  Invalid_regular_expression_flags = 209,\r\n  Implementation_0_must_match_the_signature_1 = 210,\r\n  Class_0_is_sealed_and_cannot_be_extended = 211,\r\n  Decorator_0_is_not_valid_here = 212,\r\n  Duplicate_decorator = 213,\r\n  An_allocator_must_be_declared_to_allocate_memory_Try_importing_allocator_arena_or_allocator_tlsf = 214,\r\n  Optional_parameter_must_have_an_initializer = 215,\r\n  Constructor_of_class_0_must_not_require_any_arguments = 216,\r\n  Function_0_cannot_be_inlined_into_itself = 217,\r\n  Cannot_access_method_0_without_calling_it_as_it_requires_this_to_be_set = 218,\r\n  Unterminated_string_literal = 1002,\r\n  Identifier_expected = 1003,\r\n  _0_expected = 1005,\r\n  A_file_cannot_have_a_reference_to_itself = 1006,\r\n  Trailing_comma_not_allowed = 1009,\r\n  Unexpected_token = 1012,\r\n  A_rest_parameter_must_be_last_in_a_parameter_list = 1014,\r\n  Parameter_cannot_have_question_mark_and_initializer = 1015,\r\n  A_required_parameter_cannot_follow_an_optional_parameter = 1016,\r\n  Statements_are_not_allowed_in_ambient_contexts = 1036,\r\n  Initializers_are_not_allowed_in_ambient_contexts = 1039,\r\n  _0_modifier_cannot_be_used_here = 1042,\r\n  A_rest_parameter_cannot_be_optional = 1047,\r\n  A_rest_parameter_cannot_have_an_initializer = 1048,\r\n  A_set_accessor_must_have_exactly_one_parameter = 1049,\r\n  A_set_accessor_parameter_cannot_have_an_initializer = 1052,\r\n  A_get_accessor_cannot_have_parameters = 1054,\r\n  Enum_member_must_have_initializer = 1061,\r\n  Type_parameters_cannot_appear_on_a_constructor_declaration = 1092,\r\n  Type_annotation_cannot_appear_on_a_constructor_declaration = 1093,\r\n  An_accessor_cannot_have_type_parameters = 1094,\r\n  A_set_accessor_cannot_have_a_return_type_annotation = 1095,\r\n  Type_parameter_list_cannot_be_empty = 1098,\r\n  A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement = 1104,\r\n  A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement = 1105,\r\n  A_return_statement_can_only_be_used_within_a_function_body = 1108,\r\n  Expression_expected = 1109,\r\n  Type_expected = 1110,\r\n  A_default_clause_cannot_appear_more_than_once_in_a_switch_statement = 1113,\r\n  Duplicate_label_0 = 1114,\r\n  Octal_literals_are_not_allowed_in_strict_mode = 1121,\r\n  Digit_expected = 1124,\r\n  Hexadecimal_digit_expected = 1125,\r\n  Unexpected_end_of_text = 1126,\r\n  Invalid_character = 1127,\r\n  _case_or_default_expected = 1130,\r\n  A_declare_modifier_cannot_be_used_in_an_already_ambient_context = 1038,\r\n  Type_argument_expected = 1140,\r\n  String_literal_expected = 1141,\r\n  Line_break_not_permitted_here = 1142,\r\n  Declaration_expected = 1146,\r\n  _const_declarations_must_be_initialized = 1155,\r\n  Unterminated_regular_expression_literal = 1161,\r\n  Interface_declaration_cannot_have_implements_clause = 1176,\r\n  Binary_digit_expected = 1177,\r\n  Octal_digit_expected = 1178,\r\n  An_implementation_cannot_be_declared_in_ambient_contexts = 1183,\r\n  An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive = 1198,\r\n  Unterminated_Unicode_escape_sequence = 1199,\r\n  Decorators_are_not_valid_here = 1206,\r\n  _abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration = 1242,\r\n  Method_0_cannot_have_an_implementation_because_it_is_marked_abstract = 1245,\r\n  A_class_may_only_extend_another_class = 1311,\r\n  A_parameter_property_cannot_be_declared_using_a_rest_parameter = 1317,\r\n  Duplicate_identifier_0 = 2300,\r\n  Cannot_find_name_0 = 2304,\r\n  Module_0_has_no_exported_member_1 = 2305,\r\n  Generic_type_0_requires_1_type_argument_s = 2314,\r\n  Type_0_is_not_generic = 2315,\r\n  Type_0_is_not_assignable_to_type_1 = 2322,\r\n  Index_signature_is_missing_in_type_0 = 2329,\r\n  _this_cannot_be_referenced_in_current_location = 2332,\r\n  _super_can_only_be_referenced_in_a_derived_class = 2335,\r\n  Property_0_does_not_exist_on_type_1 = 2339,\r\n  Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures = 2349,\r\n  Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature = 2351,\r\n  A_function_whose_declared_type_is_not_void_must_return_a_value = 2355,\r\n  The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access = 2357,\r\n  The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access = 2364,\r\n  Operator_0_cannot_be_applied_to_types_1_and_2 = 2365,\r\n  _get_and_set_accessor_must_have_the_same_type = 2380,\r\n  Constructor_implementation_is_missing = 2390,\r\n  Function_implementation_is_missing_or_not_immediately_following_the_declaration = 2391,\r\n  Multiple_constructor_implementations_are_not_allowed = 2392,\r\n  Duplicate_function_implementation = 2393,\r\n  Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local = 2395,\r\n  Type_0_has_no_property_1 = 2460,\r\n  The_0_operator_cannot_be_applied_to_type_1 = 2469,\r\n  In_const_enum_declarations_member_initializer_must_be_constant_expression = 2474,\r\n  Export_declaration_conflicts_with_exported_declaration_of_0 = 2484,\r\n  Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property = 2540,\r\n  The_target_of_an_assignment_must_be_a_variable_or_a_property_access = 2541,\r\n  Index_signature_in_type_0_only_permits_reading = 2542,\r\n  Expected_0_arguments_but_got_1 = 2554,\r\n  Expected_at_least_0_arguments_but_got_1 = 2555,\r\n  Expected_0_type_arguments_but_got_1 = 2558,\r\n  A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums = 2651,\r\n  Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration = 2673,\r\n  Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration = 2674,\r\n  Namespace_0_has_no_exported_member_1 = 2694,\r\n  File_0_not_found = 6054,\r\n  Numeric_separators_are_not_allowed_here = 6188,\r\n  Multiple_consecutive_numeric_separators_are_not_permitted = 6189\r\n}\r\n\r\n/** Translates a diagnostic code to its respective string. */\r\nexport function diagnosticCodeToString(code: DiagnosticCode): string {\r\n  switch (code) {\r\n    case 100: return \"Operation not supported.\";\r\n    case 101: return \"Operation is unsafe.\";\r\n    case 102: return \"User-defined: {0}\";\r\n    case 200: return \"Conversion from type '{0}' to '{1}' requires an explicit cast.\";\r\n    case 201: return \"Conversion from type '{0}' to '{1}' will require an explicit cast when switching between 32/64-bit.\";\r\n    case 202: return \"Type '{0}' cannot be changed to type '{1}'.\";\r\n    case 203: return \"Type '{0}' cannot be reinterpreted as type '{1}'.\";\r\n    case 204: return \"Basic type '{0}' cannot be nullable.\";\r\n    case 205: return \"Cannot export a mutable global.\";\r\n    case 206: return \"Compiling constant with non-constant initializer as mutable.\";\r\n    case 207: return \"Unmanaged classes cannot extend managed classes and vice-versa.\";\r\n    case 208: return \"Unmanaged classes cannot implement interfaces.\";\r\n    case 209: return \"Invalid regular expression flags.\";\r\n    case 210: return \"Implementation '{0}' must match the signature '{1}'.\";\r\n    case 211: return \"Class '{0}' is sealed and cannot be extended.\";\r\n    case 212: return \"Decorator '{0}' is not valid here.\";\r\n    case 213: return \"Duplicate decorator.\";\r\n    case 214: return \"An allocator must be declared to allocate memory. Try importing allocator/arena or allocator/tlsf.\";\r\n    case 215: return \"Optional parameter must have an initializer.\";\r\n    case 216: return \"Constructor of class '{0}' must not require any arguments.\";\r\n    case 217: return \"Function '{0}' cannot be inlined into itself.\";\r\n    case 218: return \"Cannot access method '{0}' without calling it as it requires 'this' to be set.\";\r\n    case 1002: return \"Unterminated string literal.\";\r\n    case 1003: return \"Identifier expected.\";\r\n    case 1005: return \"'{0}' expected.\";\r\n    case 1006: return \"A file cannot have a reference to itself.\";\r\n    case 1009: return \"Trailing comma not allowed.\";\r\n    case 1012: return \"Unexpected token.\";\r\n    case 1014: return \"A rest parameter must be last in a parameter list.\";\r\n    case 1015: return \"Parameter cannot have question mark and initializer.\";\r\n    case 1016: return \"A required parameter cannot follow an optional parameter.\";\r\n    case 1036: return \"Statements are not allowed in ambient contexts.\";\r\n    case 1039: return \"Initializers are not allowed in ambient contexts.\";\r\n    case 1042: return \"'{0}' modifier cannot be used here.\";\r\n    case 1047: return \"A rest parameter cannot be optional.\";\r\n    case 1048: return \"A rest parameter cannot have an initializer.\";\r\n    case 1049: return \"A 'set' accessor must have exactly one parameter.\";\r\n    case 1052: return \"A 'set' accessor parameter cannot have an initializer.\";\r\n    case 1054: return \"A 'get' accessor cannot have parameters.\";\r\n    case 1061: return \"Enum member must have initializer.\";\r\n    case 1092: return \"Type parameters cannot appear on a constructor declaration.\";\r\n    case 1093: return \"Type annotation cannot appear on a constructor declaration.\";\r\n    case 1094: return \"An accessor cannot have type parameters.\";\r\n    case 1095: return \"A 'set' accessor cannot have a return type annotation.\";\r\n    case 1098: return \"Type parameter list cannot be empty.\";\r\n    case 1104: return \"A 'continue' statement can only be used within an enclosing iteration statement.\";\r\n    case 1105: return \"A 'break' statement can only be used within an enclosing iteration or switch statement.\";\r\n    case 1108: return \"A 'return' statement can only be used within a function body.\";\r\n    case 1109: return \"Expression expected.\";\r\n    case 1110: return \"Type expected.\";\r\n    case 1113: return \"A 'default' clause cannot appear more than once in a 'switch' statement.\";\r\n    case 1114: return \"Duplicate label '{0}'.\";\r\n    case 1121: return \"Octal literals are not allowed in strict mode.\";\r\n    case 1124: return \"Digit expected.\";\r\n    case 1125: return \"Hexadecimal digit expected.\";\r\n    case 1126: return \"Unexpected end of text.\";\r\n    case 1127: return \"Invalid character.\";\r\n    case 1130: return \"'case' or 'default' expected.\";\r\n    case 1038: return \"A 'declare' modifier cannot be used in an already ambient context.\";\r\n    case 1140: return \"Type argument expected.\";\r\n    case 1141: return \"String literal expected.\";\r\n    case 1142: return \"Line break not permitted here.\";\r\n    case 1146: return \"Declaration expected.\";\r\n    case 1155: return \"'const' declarations must be initialized.\";\r\n    case 1161: return \"Unterminated regular expression literal.\";\r\n    case 1176: return \"Interface declaration cannot have 'implements' clause.\";\r\n    case 1177: return \"Binary digit expected.\";\r\n    case 1178: return \"Octal digit expected.\";\r\n    case 1183: return \"An implementation cannot be declared in ambient contexts.\";\r\n    case 1198: return \"An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive.\";\r\n    case 1199: return \"Unterminated Unicode escape sequence.\";\r\n    case 1206: return \"Decorators are not valid here.\";\r\n    case 1242: return \"'abstract' modifier can only appear on a class, method, or property declaration.\";\r\n    case 1245: return \"Method '{0}' cannot have an implementation because it is marked abstract.\";\r\n    case 1311: return \"A class may only extend another class.\";\r\n    case 1317: return \"A parameter property cannot be declared using a rest parameter.\";\r\n    case 2300: return \"Duplicate identifier '{0}'.\";\r\n    case 2304: return \"Cannot find name '{0}'.\";\r\n    case 2305: return \"Module '{0}' has no exported member '{1}'.\";\r\n    case 2314: return \"Generic type '{0}' requires {1} type argument(s).\";\r\n    case 2315: return \"Type '{0}' is not generic.\";\r\n    case 2322: return \"Type '{0}' is not assignable to type '{1}'.\";\r\n    case 2329: return \"Index signature is missing in type '{0}'.\";\r\n    case 2332: return \"'this' cannot be referenced in current location.\";\r\n    case 2335: return \"'super' can only be referenced in a derived class.\";\r\n    case 2339: return \"Property '{0}' does not exist on type '{1}'.\";\r\n    case 2349: return \"Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures.\";\r\n    case 2351: return \"Cannot use 'new' with an expression whose type lacks a construct signature.\";\r\n    case 2355: return \"A function whose declared type is not 'void' must return a value.\";\r\n    case 2357: return \"The operand of an increment or decrement operator must be a variable or a property access.\";\r\n    case 2364: return \"The left-hand side of an assignment expression must be a variable or a property access.\";\r\n    case 2365: return \"Operator '{0}' cannot be applied to types '{1}' and '{2}'.\";\r\n    case 2380: return \"'get' and 'set' accessor must have the same type.\";\r\n    case 2390: return \"Constructor implementation is missing.\";\r\n    case 2391: return \"Function implementation is missing or not immediately following the declaration.\";\r\n    case 2392: return \"Multiple constructor implementations are not allowed.\";\r\n    case 2393: return \"Duplicate function implementation.\";\r\n    case 2395: return \"Individual declarations in merged declaration '{0}' must be all exported or all local.\";\r\n    case 2460: return \"Type '{0}' has no property '{1}'.\";\r\n    case 2469: return \"The '{0}' operator cannot be applied to type '{1}'.\";\r\n    case 2474: return \"In 'const' enum declarations member initializer must be constant expression.\";\r\n    case 2484: return \"Export declaration conflicts with exported declaration of '{0}'.\";\r\n    case 2540: return \"Cannot assign to '{0}' because it is a constant or a read-only property.\";\r\n    case 2541: return \"The target of an assignment must be a variable or a property access.\";\r\n    case 2542: return \"Index signature in type '{0}' only permits reading.\";\r\n    case 2554: return \"Expected {0} arguments, but got {1}.\";\r\n    case 2555: return \"Expected at least {0} arguments, but got {1}.\";\r\n    case 2558: return \"Expected {0} type arguments, but got {1}.\";\r\n    case 2651: return \"A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums.\";\r\n    case 2673: return \"Constructor of class '{0}' is private and only accessible within the class declaration.\";\r\n    case 2674: return \"Constructor of class '{0}' is protected and only accessible within the class declaration.\";\r\n    case 2694: return \"Namespace '{0}' has no exported member '{1}'.\";\r\n    case 6054: return \"File '{0}' not found.\";\r\n    case 6188: return \"Numeric separators are not allowed here.\";\r\n    case 6189: return \"Multiple consecutive numeric separators are not permitted.\";\r\n    default: return \"\";\r\n  }\r\n}\r\n","/**\r\n * Resolve infrastructure to obtain types and elements.\r\n * @module resolver\r\n *//***/\r\n\r\nimport {\r\n  DiagnosticEmitter,\r\n  DiagnosticCode\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Program,\r\n  ElementKind,\r\n  OperatorKind,\r\n  FlowFlags,\r\n\r\n  Element,\r\n  Class,\r\n  ClassPrototype,\r\n  Function,\r\n  FunctionTarget,\r\n  FunctionPrototype,\r\n  VariableLikeElement,\r\n  Property,\r\n  DecoratorFlags,\r\n  FieldPrototype,\r\n  Field\r\n} from \"./program\";\r\n\r\nimport {\r\n  SignatureNode,\r\n  ParameterKind,\r\n  CommonTypeNode,\r\n  NodeKind,\r\n  TypeNode,\r\n  TypeParameterNode,\r\n  Node,\r\n  Range,\r\n  IdentifierExpression,\r\n  CallExpression,\r\n  ElementAccessExpression,\r\n  PropertyAccessExpression,\r\n  LiteralExpression,\r\n  LiteralKind,\r\n  ParenthesizedExpression,\r\n  AssertionExpression,\r\n  Expression\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Type,\r\n  Signature,\r\n  typesToString\r\n} from \"./types\";\r\n\r\nimport {\r\n  PATH_DELIMITER,\r\n  INSTANCE_DELIMITER,\r\n  CommonFlags\r\n} from \"./common\";\r\n\r\n/** Indicates whether errors are reported or not. */\r\nexport enum ReportMode {\r\n  /** Report errors. */\r\n  REPORT,\r\n  /** Swallow errors. */\r\n  SWALLOW\r\n}\r\n\r\n/** Provides tools to resolve types and expressions. */\r\nexport class Resolver extends DiagnosticEmitter {\r\n\r\n  /** The program this resolver belongs to. */\r\n  program: Program;\r\n\r\n  /** Target expression of the previously resolved property or element access. */\r\n  currentThisExpression: Expression | null = null;\r\n  /** Element expression of the previously resolved element access. */\r\n  currentElementExpression : Expression | null = null;\r\n\r\n  /** Constructs the resolver for the specified program. */\r\n  constructor(program: Program) {\r\n    super(program.diagnostics);\r\n    this.program = program;\r\n  }\r\n\r\n  /** Resolves a {@link CommonTypeNode} to a concrete {@link Type}. */\r\n  resolveType(\r\n    node: CommonTypeNode,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    reportMode = ReportMode.REPORT\r\n  ): Type | null {\r\n\r\n    // handle signatures specifically\r\n    if (node.kind == NodeKind.SIGNATURE) {\r\n      let signature = this.resolveSignature(<SignatureNode>node, contextualTypeArguments, reportMode);\r\n      if (!signature) return null;\r\n      return node.isNullable ? signature.type.asNullable() : signature.type;\r\n    }\r\n\r\n    // now dealing with TypeNode\r\n    assert(node.kind == NodeKind.TYPE);\r\n    var typeNode = <TypeNode>node;\r\n    var simpleName = typeNode.name.text;\r\n    var globalName = simpleName;\r\n    var localName = typeNode.range.source.internalPath + PATH_DELIMITER + simpleName; // TODO cache\r\n\r\n    // check file-global / program-global enum or class\r\n    {\r\n      let elementsLookup = this.program.elementsLookup;\r\n      let element: Element | null;\r\n      if (\r\n        (element = elementsLookup.get(localName)) || // file-global\r\n        (element = elementsLookup.get(globalName))   // program-global\r\n      ) {\r\n        switch (element.kind) {\r\n          case ElementKind.ENUM: {\r\n            if (typeNode.typeArguments !== null && typeNode.typeArguments.length) {\r\n              if (reportMode == ReportMode.REPORT) {\r\n                this.error(\r\n                  DiagnosticCode.Type_0_is_not_generic,\r\n                  node.range, element.internalName\r\n                );\r\n              }\r\n              return null;\r\n            }\r\n            return Type.i32;\r\n          }\r\n          case ElementKind.CLASS_PROTOTYPE: {\r\n            let instance = this.resolveClassInclTypeArguments(\r\n              <ClassPrototype>element,\r\n              typeNode.typeArguments,\r\n              contextualTypeArguments,\r\n              node\r\n            ); // reports\r\n            if (!instance) return null;\r\n            return node.isNullable ? instance.type.asNullable() : instance.type;\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    // check (global) type alias\r\n    {\r\n      let alias = this.program.typeAliases.get(simpleName);\r\n      if (alias) return this.resolveType(alias.type, contextualTypeArguments, reportMode);\r\n    }\r\n\r\n    // resolve parameters\r\n    {\r\n      let typeArgumentNodes = typeNode.typeArguments;\r\n      if (typeArgumentNodes) {\r\n        let numTypeArguments = typeArgumentNodes.length;\r\n        let paramTypes = new Array<Type>(numTypeArguments);\r\n        for (let i = 0; i < numTypeArguments; ++i) {\r\n          let paramType = this.resolveType( // reports\r\n            typeArgumentNodes[i],\r\n            contextualTypeArguments,\r\n            reportMode\r\n          );\r\n          if (!paramType) return null;\r\n          paramTypes[i] = paramType;\r\n        }\r\n        if (numTypeArguments) { // can't be a placeholder if it has parameters\r\n          let instanceKey = typesToString(paramTypes);\r\n          if (instanceKey.length) {\r\n            localName += \"<\" + instanceKey + \">\";\r\n            globalName += \"<\" + instanceKey + \">\";\r\n          }\r\n        } else if (contextualTypeArguments) {\r\n          let placeholderType = contextualTypeArguments.get(globalName);\r\n          if (placeholderType) return placeholderType;\r\n        }\r\n      }\r\n    }\r\n\r\n    // check file-global / program-global type\r\n    {\r\n      let typesLookup = this.program.typesLookup;\r\n      let type: Type | null;\r\n      if (\r\n        (type = typesLookup.get(localName)) ||\r\n        (type = typesLookup.get(globalName))\r\n      ) {\r\n        return type;\r\n      }\r\n    }\r\n\r\n    if (reportMode == ReportMode.REPORT) {\r\n      this.error(\r\n        DiagnosticCode.Cannot_find_name_0,\r\n        typeNode.name.range, globalName\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  /** Resolves a {@link SignatureNode} to a concrete {@link Signature}. */\r\n  resolveSignature(\r\n    node: SignatureNode,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Signature | null {\r\n    var explicitThisType = node.explicitThisType;\r\n    var thisType: Type | null = null;\r\n    if (explicitThisType) {\r\n      thisType = this.resolveType(explicitThisType, contextualTypeArguments, reportMode);\r\n      if (!thisType) return null;\r\n    }\r\n    var parameterTypeNodes = node.parameters;\r\n    var numParameters = parameterTypeNodes.length;\r\n    var parameterTypes = new Array<Type>(numParameters);\r\n    var parameterNames = new Array<string>(numParameters);\r\n    var requiredParameters = 0;\r\n    var hasRest = false;\r\n    for (let i = 0; i < numParameters; ++i) {\r\n      let parameterTypeNode = parameterTypeNodes[i];\r\n      switch (parameterTypeNode.parameterKind) {\r\n        case ParameterKind.DEFAULT: {\r\n          requiredParameters = i + 1;\r\n          break;\r\n        }\r\n        case ParameterKind.REST: {\r\n          assert(i == numParameters);\r\n          hasRest = true;\r\n          break;\r\n        }\r\n      }\r\n      let parameterType = this.resolveType(\r\n        assert(parameterTypeNode.type),\r\n        contextualTypeArguments,\r\n        reportMode\r\n      );\r\n      if (!parameterType) return null;\r\n      parameterTypes[i] = parameterType;\r\n      parameterNames[i] = parameterTypeNode.name.text;\r\n    }\r\n    var returnTypeNode = node.returnType;\r\n    var returnType: Type | null;\r\n    if (returnTypeNode) {\r\n      returnType = this.resolveType(returnTypeNode, contextualTypeArguments, reportMode);\r\n      if (!returnType) return null;\r\n    } else {\r\n      returnType = Type.void;\r\n    }\r\n    var signature = new Signature(parameterTypes, returnType, thisType);\r\n    signature.parameterNames = parameterNames;\r\n    signature.requiredParameters = requiredParameters;\r\n    signature.hasRest = hasRest;\r\n    return signature;\r\n  }\r\n\r\n  /** Resolves an array of type arguments to concrete types. */\r\n  resolveTypeArguments(\r\n    typeParameters: TypeParameterNode[],\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    alternativeReportNode: Node | null = null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Type[] | null {\r\n    var parameterCount = typeParameters.length;\r\n    var argumentCount = typeArgumentNodes ? typeArgumentNodes.length : 0;\r\n    if (parameterCount != argumentCount) {\r\n      if (argumentCount) {\r\n        this.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          Range.join(\r\n            (<TypeNode[]>typeArgumentNodes)[0].range,\r\n            (<TypeNode[]>typeArgumentNodes)[argumentCount - 1].range\r\n          ),\r\n          parameterCount.toString(10), argumentCount.toString(10)\r\n        );\r\n      } else if (alternativeReportNode) {\r\n        this.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          alternativeReportNode.range.atEnd, parameterCount.toString(10), \"0\"\r\n        );\r\n      }\r\n      return null;\r\n    }\r\n    var typeArguments = new Array<Type>(parameterCount);\r\n    for (let i = 0; i < parameterCount; ++i) {\r\n      let type = this.resolveType( // reports\r\n        (<TypeNode[]>typeArgumentNodes)[i],\r\n        contextualTypeArguments,\r\n        reportMode\r\n      );\r\n      if (!type) return null;\r\n      // TODO: check extendsType\r\n      typeArguments[i] = type;\r\n    }\r\n    return typeArguments;\r\n  }\r\n\r\n  /** Resolves an identifier to the element it refers to. */\r\n  resolveIdentifier(\r\n    identifier: IdentifierExpression,\r\n    context: Element | null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Element | null {\r\n    var name = identifier.text;\r\n    var element: Element | null;\r\n\r\n    if (context) {\r\n\r\n      switch (context.kind) {\r\n        case ElementKind.FUNCTION: { // search locals, use prototype\r\n          element = (<Function>context).flow.getScopedLocal(name);\r\n          if (element) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return element;\r\n          }\r\n          context = (<Function>context).prototype.parent;\r\n          break;\r\n        }\r\n        case ElementKind.CLASS: { // use prototype\r\n          context = (<Class>context).prototype.parent;\r\n          break;\r\n        }\r\n      }\r\n\r\n      // search context\r\n      while (context) {\r\n        let members = context.members;\r\n        if (members) {\r\n          if (element = members.get(name)) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return element;\r\n          }\r\n        }\r\n        context = context.parent;\r\n      }\r\n    }\r\n\r\n    // search current file\r\n    var elementsLookup = this.program.elementsLookup;\r\n    if (element = elementsLookup.get(identifier.range.source.internalPath + PATH_DELIMITER + name)) {\r\n      this.currentThisExpression = null;\r\n      this.currentElementExpression = null;\r\n      return element; // GLOBAL, FUNCTION_PROTOTYPE, CLASS_PROTOTYPE\r\n    }\r\n\r\n    // search global scope\r\n    if (element = elementsLookup.get(name)) {\r\n      this.currentThisExpression = null;\r\n      this.currentElementExpression = null;\r\n      return element; // GLOBAL, FUNCTION_PROTOTYPE, CLASS_PROTOTYPE\r\n    }\r\n\r\n    if (reportMode == ReportMode.REPORT) {\r\n      this.error(\r\n        DiagnosticCode.Cannot_find_name_0,\r\n        identifier.range, name\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  /** Resolves a property access to the element it refers to. */\r\n  resolvePropertyAccess(\r\n    propertyAccess: PropertyAccessExpression,\r\n    contextualFunction: Function,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Element | null {\r\n    // start by resolving the lhs target (expression before the last dot)\r\n    var targetExpression = propertyAccess.expression;\r\n    var target = this.resolveExpression(targetExpression, contextualFunction, reportMode); // reports\r\n    if (!target) return null;\r\n\r\n    // at this point we know exactly what the target is, so look up the element within\r\n    var propertyName = propertyAccess.property.text;\r\n\r\n    // Resolve variable-likes to the class type they reference first\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL:\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        let type = (<VariableLikeElement>target).type;\r\n        assert(type != Type.void);\r\n        let classReference = type.classReference;\r\n        if (!classReference) {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.property.range, propertyName, (<VariableLikeElement>target).type.toString()\r\n          );\r\n          return null;\r\n        }\r\n        target = classReference;\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let getter = this.resolveFunction(\r\n          assert((<Property>target).getterPrototype),\r\n          null,\r\n          null,\r\n          reportMode\r\n        );\r\n        if (!getter) return null;\r\n        let classReference = getter.signature.returnType.classReference;\r\n        if (!classReference) {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.property.range, propertyName, getter.signature.returnType.toString()\r\n          );\r\n          return null;\r\n        }\r\n        target = classReference;\r\n        break;\r\n      }\r\n      case ElementKind.CLASS: {\r\n        let elementExpression = this.currentElementExpression;\r\n        if (elementExpression) {\r\n          let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET);\r\n          if (!indexedGet) {\r\n            this.error(\r\n              DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n              elementExpression.range, (<Class>target).internalName\r\n            );\r\n            return null;\r\n          }\r\n          let returnType = indexedGet.signature.returnType;\r\n          if (!(target = returnType.classReference)) {\r\n            this.error(\r\n              DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n              propertyAccess.property.range, propertyName, returnType.toString()\r\n            );\r\n            return null;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n    }\r\n\r\n    // Look up the member within\r\n    switch (target.kind) {\r\n      case ElementKind.CLASS_PROTOTYPE:\r\n      case ElementKind.CLASS: {\r\n        do {\r\n          let members = target.members;\r\n          let member: Element | null;\r\n          if (members && (member = members.get(propertyName))) {\r\n            this.currentThisExpression = targetExpression;\r\n            this.currentElementExpression = null;\r\n            return member; // instance FIELD, static GLOBAL, FUNCTION_PROTOTYPE...\r\n          }\r\n          // traverse inherited static members on the base prototype if target is a class prototype\r\n          if (target.kind == ElementKind.CLASS_PROTOTYPE) {\r\n            if ((<ClassPrototype>target).basePrototype) {\r\n              target = <ClassPrototype>(<ClassPrototype>target).basePrototype;\r\n            } else {\r\n              break;\r\n            }\r\n          // traverse inherited instance members on the base class if target is a class instance\r\n          } else if (target.kind == ElementKind.CLASS) {\r\n            if ((<Class>target).base) {\r\n              target = <Class>(<Class>target).base;\r\n            } else {\r\n              break;\r\n            }\r\n          } else {\r\n            break;\r\n          }\r\n        } while (true);\r\n        break;\r\n      }\r\n      default: { // enums or other namespace-like elements\r\n        let members = target.members;\r\n        if (members) {\r\n          let member = members.get(propertyName);\r\n          if (member) {\r\n            this.currentThisExpression = targetExpression;\r\n            this.currentElementExpression = null;\r\n            return member; // static ENUMVALUE, static GLOBAL, static FUNCTION_PROTOTYPE...\r\n          }\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n      propertyAccess.property.range, propertyName, target.internalName\r\n    );\r\n    return null;\r\n  }\r\n\r\n  resolveElementAccess(\r\n    elementAccess: ElementAccessExpression,\r\n    contextualFunction: Function,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Element | null {\r\n    var targetExpression = elementAccess.expression;\r\n    var target = this.resolveExpression(targetExpression, contextualFunction, reportMode);\r\n    if (!target) return null;\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL:\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        let type = (<VariableLikeElement>target).type;\r\n        if (target = type.classReference) {\r\n          this.currentThisExpression = targetExpression;\r\n          this.currentElementExpression = elementAccess.elementExpression;\r\n          return target;\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.CLASS: { // element access on element access\r\n        let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET);\r\n        if (!indexedGet) {\r\n          if (reportMode == ReportMode.REPORT) {\r\n            this.error(\r\n              DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n              elementAccess.range, (<Class>target).internalName\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n        let returnType = indexedGet.signature.returnType;\r\n        if (target = returnType.classReference) {\r\n          this.currentThisExpression = targetExpression;\r\n          this.currentElementExpression = elementAccess.elementExpression;\r\n          return target;\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    if (reportMode == ReportMode.REPORT) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        targetExpression.range\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  resolveExpression(\r\n    expression: Expression,\r\n    contextualFunction: Function,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Element | null {\r\n    while (expression.kind == NodeKind.PARENTHESIZED) {\r\n      expression = (<ParenthesizedExpression>expression).expression;\r\n    }\r\n    switch (expression.kind) {\r\n      case NodeKind.ASSERTION: {\r\n        let type = this.resolveType(\r\n          (<AssertionExpression>expression).toType,\r\n          contextualFunction.flow.contextualTypeArguments,\r\n          reportMode\r\n        );\r\n        if (type) {\r\n          let classType = type.classReference;\r\n          if (classType) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return classType;\r\n          }\r\n        }\r\n        return null;\r\n      }\r\n      case NodeKind.BINARY: { // TODO: string concatenation, mostly\r\n        throw new Error(\"not implemented\");\r\n      }\r\n      case NodeKind.THIS: { // -> Class / ClassPrototype\r\n        if (contextualFunction.flow.is(FlowFlags.INLINE_CONTEXT)) {\r\n          let explicitLocal = contextualFunction.flow.getScopedLocal(\"this\");\r\n          if (explicitLocal) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return explicitLocal;\r\n          }\r\n        }\r\n        let parent = contextualFunction.parent;\r\n        if (parent) {\r\n          this.currentThisExpression = null;\r\n          this.currentElementExpression = null;\r\n          return parent;\r\n        }\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.error(\r\n            DiagnosticCode._this_cannot_be_referenced_in_current_location,\r\n            expression.range\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      case NodeKind.SUPER: { // -> Class\r\n        if (contextualFunction.flow.is(FlowFlags.INLINE_CONTEXT)) {\r\n          let explicitLocal = contextualFunction.flow.getScopedLocal(\"super\");\r\n          if (explicitLocal) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return explicitLocal;\r\n          }\r\n        }\r\n        let parent = contextualFunction.parent;\r\n        if (parent && parent.kind == ElementKind.CLASS && (parent = (<Class>parent).base)) {\r\n          this.currentThisExpression = null;\r\n          this.currentElementExpression = null;\r\n          return parent;\r\n        }\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.error(\r\n            DiagnosticCode._super_can_only_be_referenced_in_a_derived_class,\r\n            expression.range\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      case NodeKind.IDENTIFIER: {\r\n        return this.resolveIdentifier(<IdentifierExpression>expression, contextualFunction, reportMode);\r\n      }\r\n      case NodeKind.LITERAL: {\r\n        switch ((<LiteralExpression>expression).literalKind) {\r\n          case LiteralKind.STRING: {\r\n            this.currentThisExpression = expression;\r\n            this.currentElementExpression = null;\r\n            return this.program.stringInstance;\r\n          }\r\n          // case LiteralKind.ARRAY: // TODO\r\n        }\r\n        break;\r\n      }\r\n      case NodeKind.PROPERTYACCESS: {\r\n        return this.resolvePropertyAccess(\r\n          <PropertyAccessExpression>expression,\r\n          contextualFunction,\r\n          reportMode\r\n        );\r\n      }\r\n      case NodeKind.ELEMENTACCESS: {\r\n        return this.resolveElementAccess(\r\n          <ElementAccessExpression>expression,\r\n          contextualFunction,\r\n          reportMode\r\n        );\r\n      }\r\n      case NodeKind.CALL: {\r\n        let targetExpression = (<CallExpression>expression).expression;\r\n        let target = this.resolveExpression(targetExpression, contextualFunction, reportMode);\r\n        if (!target) return null;\r\n        if (target.kind == ElementKind.FUNCTION_PROTOTYPE) {\r\n          let instance = this.resolveFunctionInclTypeArguments(\r\n            <FunctionPrototype>target,\r\n            (<CallExpression>expression).typeArguments,\r\n            contextualFunction.flow.contextualTypeArguments,\r\n            expression,\r\n            reportMode\r\n          );\r\n          if (!instance) return null;\r\n          let returnType = instance.signature.returnType;\r\n          let classType = returnType.classReference;\r\n          if (classType) {\r\n            // reuse resolvedThisExpression (might be property access)\r\n            // reuse resolvedElementExpression (might be element access)\r\n            return classType;\r\n          } else {\r\n            let signature = returnType.signatureReference;\r\n            if (signature) {\r\n              let functionTarget = signature.cachedFunctionTarget;\r\n              if (!functionTarget) {\r\n                functionTarget = new FunctionTarget(this.program, signature);\r\n                signature.cachedFunctionTarget = functionTarget;\r\n              }\r\n              // reuse resolvedThisExpression (might be property access)\r\n              // reuse resolvedElementExpression (might be element access)\r\n              return functionTarget;\r\n            }\r\n          }\r\n          if (reportMode == ReportMode.REPORT) {\r\n            this.error(\r\n              DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n              targetExpression.range, target.internalName\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    if (reportMode == ReportMode.REPORT) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        expression.range\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  /** Resolves a function prototype to an instance using the specified concrete type arguments. */\r\n  resolveFunction(\r\n    prototype: FunctionPrototype,\r\n    typeArguments: Type[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Function | null {\r\n    var instanceKey = typeArguments ? typesToString(typeArguments) : \"\";\r\n    var instance = prototype.instances.get(instanceKey);\r\n    if (instance) return instance;\r\n\r\n    var declaration = prototype.declaration;\r\n    var isInstance = prototype.is(CommonFlags.INSTANCE);\r\n    var classPrototype = prototype.classPrototype;\r\n\r\n    // inherit contextual type arguments as provided. might be overridden.\r\n    var inheritedTypeArguments = contextualTypeArguments;\r\n    contextualTypeArguments = new Map();\r\n    if (inheritedTypeArguments) {\r\n      for (let [inheritedName, inheritedType] of inheritedTypeArguments) {\r\n        contextualTypeArguments.set(\r\n          inheritedName,\r\n          inheritedType\r\n        );\r\n      }\r\n    }\r\n\r\n    // override with class type arguments if a partially resolved instance method\r\n    var classTypeArguments = prototype.classTypeArguments;\r\n    if (classTypeArguments) { // set only if partially resolved\r\n      assert(prototype.is(CommonFlags.INSTANCE));\r\n      let classDeclaration = assert(classPrototype).declaration;\r\n      let classTypeParameters = classDeclaration.typeParameters;\r\n      let numClassTypeParameters = classTypeParameters.length;\r\n      assert(numClassTypeParameters == classTypeArguments.length);\r\n      for (let i = 0; i < numClassTypeParameters; ++i) {\r\n        contextualTypeArguments.set(\r\n          classTypeParameters[i].name.text,\r\n          classTypeArguments[i]\r\n        );\r\n      }\r\n    } else {\r\n      assert(!classTypeArguments);\r\n    }\r\n\r\n    // override with function specific type arguments\r\n    var signatureNode = declaration.signature;\r\n    var functionTypeParameters = declaration.typeParameters;\r\n    var numFunctionTypeArguments: i32;\r\n    if (typeArguments && (numFunctionTypeArguments = typeArguments.length)) {\r\n      assert(functionTypeParameters && numFunctionTypeArguments == functionTypeParameters.length);\r\n      for (let i = 0; i < numFunctionTypeArguments; ++i) {\r\n        contextualTypeArguments.set(\r\n          (<TypeParameterNode[]>functionTypeParameters)[i].name.text,\r\n          typeArguments[i]\r\n        );\r\n      }\r\n    } else {\r\n      assert(!functionTypeParameters || functionTypeParameters.length == 0);\r\n    }\r\n\r\n    // resolve class if an instance method\r\n    var classInstance: Class | null = null;\r\n    var thisType: Type | null = null;\r\n    if (isInstance) {\r\n      classInstance = this.resolveClass(\r\n        assert(classPrototype),\r\n        classTypeArguments,\r\n        contextualTypeArguments,\r\n        reportMode\r\n      );\r\n      if (!classInstance) return null;\r\n      thisType = classInstance.type;\r\n      contextualTypeArguments.set(\"this\", thisType);\r\n    }\r\n\r\n    // resolve signature node\r\n    var signatureParameters = signatureNode.parameters;\r\n    var signatureParameterCount = signatureParameters.length;\r\n    var parameterTypes = new Array<Type>(signatureParameterCount);\r\n    var parameterNames = new Array<string>(signatureParameterCount);\r\n    var requiredParameters = 0;\r\n    for (let i = 0; i < signatureParameterCount; ++i) {\r\n      let parameterDeclaration = signatureParameters[i];\r\n      if (parameterDeclaration.parameterKind == ParameterKind.DEFAULT) {\r\n        requiredParameters = i + 1;\r\n      }\r\n      let typeNode = assert(parameterDeclaration.type);\r\n      let parameterType = this.resolveType(typeNode, contextualTypeArguments, reportMode);\r\n      if (!parameterType) return null;\r\n      parameterTypes[i] = parameterType;\r\n      parameterNames[i] = parameterDeclaration.name.text;\r\n    }\r\n\r\n    var returnType: Type;\r\n    if (prototype.is(CommonFlags.SET)) {\r\n      returnType = Type.void; // not annotated\r\n    } else if (prototype.is(CommonFlags.CONSTRUCTOR)) {\r\n      returnType = assert(classInstance).type; // not annotated\r\n    } else {\r\n      let typeNode = assert(signatureNode.returnType);\r\n      let type = this.resolveType(typeNode, contextualTypeArguments, reportMode);\r\n      if (!type) return null;\r\n      returnType = type;\r\n    }\r\n\r\n    var signature = new Signature(parameterTypes, returnType, thisType);\r\n    signature.parameterNames = parameterNames;\r\n    signature.requiredParameters = requiredParameters;\r\n\r\n    var internalName = prototype.internalName;\r\n    if (instanceKey.length) internalName += \"<\" + instanceKey + \">\";\r\n    instance = new Function(\r\n      prototype,\r\n      internalName,\r\n      signature,\r\n      classInstance\r\n        ? classInstance\r\n        : classPrototype,\r\n      contextualTypeArguments\r\n    );\r\n    prototype.instances.set(instanceKey, instance);\r\n    this.program.instancesLookup.set(internalName, instance);\r\n    return instance;\r\n  }\r\n\r\n  /** Resolves a function prototype partially by applying the specified type arguments. */\r\n  resolveFunctionPartially(\r\n    prototype: FunctionPrototype,\r\n    typeArguments: Type[] | null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): FunctionPrototype | null {\r\n    assert(prototype.is(CommonFlags.INSTANCE));\r\n    var classPrototype = assert(prototype.classPrototype);\r\n\r\n    if (!(typeArguments && typeArguments.length)) return prototype; // no need to clone\r\n\r\n    var simpleName = prototype.simpleName;\r\n    var partialKey = typesToString(typeArguments);\r\n    var partialPrototype = new FunctionPrototype(\r\n      this.program,\r\n      simpleName,\r\n      classPrototype.internalName + \"<\" + partialKey + \">\" + INSTANCE_DELIMITER + simpleName,\r\n      prototype.declaration,\r\n      classPrototype,\r\n      prototype.decoratorFlags\r\n    );\r\n    partialPrototype.flags = prototype.flags;\r\n    partialPrototype.operatorKind = prototype.operatorKind;\r\n    partialPrototype.classTypeArguments = typeArguments;\r\n    return partialPrototype;\r\n  }\r\n\r\n  /** Resolves a function prototype to an instance by first resolving the specified type arguments. */\r\n  resolveFunctionInclTypeArguments(\r\n    prototype: FunctionPrototype,\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    reportNode: Node,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Function | null {\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n    if (prototype.is(CommonFlags.GENERIC)) {\r\n      assert(typeArgumentNodes != null && typeArgumentNodes.length != 0);\r\n      resolvedTypeArguments = this.resolveTypeArguments( // reports\r\n        assert(prototype.declaration.typeParameters),\r\n        typeArgumentNodes,\r\n        contextualTypeArguments,\r\n        reportNode,\r\n        reportMode\r\n      );\r\n      if (!resolvedTypeArguments) return null;\r\n    }\r\n    return this.resolveFunction(\r\n      prototype,\r\n      resolvedTypeArguments,\r\n      contextualTypeArguments,\r\n      reportMode\r\n    );\r\n  }\r\n\r\n  /** Resolves a class prototype using the specified concrete type arguments. */\r\n  resolveClass(\r\n    prototype: ClassPrototype,\r\n    typeArguments: Type[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Class | null {\r\n    var instanceKey = typeArguments ? typesToString(typeArguments) : \"\";\r\n\r\n    // Check if this exact instance has already been resolved\r\n    var instance = prototype.instances.get(instanceKey);\r\n    if (instance) return instance;\r\n\r\n    // Copy contextual type arguments so we don't pollute the original map\r\n    var inheritedTypeArguments = contextualTypeArguments;\r\n    contextualTypeArguments = new Map();\r\n    if (inheritedTypeArguments) {\r\n      for (let [inheritedName, inheritedType] of inheritedTypeArguments) {\r\n        contextualTypeArguments.set(inheritedName, inheritedType);\r\n      }\r\n    }\r\n\r\n    // Insert contextual type arguments for this operation. Internally, this method is always\r\n    // called with matching type parameter / argument counts.\r\n    var declaration = prototype.declaration;\r\n    if (typeArguments) {\r\n      let typeParameters = declaration.typeParameters;\r\n      let expectedTypeArguments = typeParameters.length;\r\n      let actualTypeArguments = typeArguments.length;\r\n      assert(actualTypeArguments == expectedTypeArguments);\r\n      for (let i = 0; i < actualTypeArguments; ++i) {\r\n        contextualTypeArguments.set(typeParameters[i].name.text, typeArguments[i]);\r\n      }\r\n    } else {\r\n      assert(declaration.typeParameters.length == 0);\r\n    }\r\n\r\n    // Resolve base class if applicable\r\n    var baseClass: Class | null = null;\r\n    if (declaration.extendsType) {\r\n      let baseClassType = this.resolveType(\r\n        declaration.extendsType,\r\n        contextualTypeArguments,\r\n        reportMode\r\n      );\r\n      if (!baseClassType) return null;\r\n      if (!(baseClass = baseClassType.classReference)) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.program.error(\r\n            DiagnosticCode.A_class_may_only_extend_another_class,\r\n            declaration.extendsType.range\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      if (baseClass.hasDecorator(DecoratorFlags.SEALED)) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.program.error(\r\n            DiagnosticCode.Class_0_is_sealed_and_cannot_be_extended,\r\n            declaration.extendsType.range, baseClass.internalName\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      if (baseClass.hasDecorator(DecoratorFlags.UNMANAGED) != prototype.hasDecorator(DecoratorFlags.UNMANAGED)) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.program.error(\r\n            DiagnosticCode.Unmanaged_classes_cannot_extend_managed_classes_and_vice_versa,\r\n            Range.join(declaration.name.range, declaration.extendsType.range)\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n    }\r\n\r\n    // Construct the instance and remember that it has been resolved already\r\n    var simpleName = prototype.simpleName;\r\n    var internalName = prototype.internalName;\r\n    if (instanceKey.length) {\r\n      simpleName += \"<\" + instanceKey + \">\";\r\n      internalName += \"<\" + instanceKey + \">\";\r\n    }\r\n    instance = new Class(prototype, simpleName, internalName, typeArguments, baseClass);\r\n    instance.contextualTypeArguments = contextualTypeArguments;\r\n    prototype.instances.set(instanceKey, instance);\r\n    this.program.instancesLookup.set(internalName, instance);\r\n\r\n    // Inherit base class members and set up the initial memory offset for own fields\r\n    var memoryOffset: u32 = 0;\r\n    if (baseClass) {\r\n      if (baseClass.members) {\r\n        if (!instance.members) instance.members = new Map();\r\n        for (let inheritedMember of baseClass.members.values()) {\r\n          instance.members.set(inheritedMember.simpleName, inheritedMember);\r\n        }\r\n      }\r\n      memoryOffset = baseClass.currentMemoryOffset;\r\n    }\r\n\r\n    // Resolve constructor by first applying the class type arguments\r\n    if (prototype.constructorPrototype) {\r\n      let constructorPartial = this.resolveFunctionPartially(\r\n        prototype.constructorPrototype,\r\n        typeArguments,\r\n        reportMode\r\n      );\r\n      if (!constructorPartial) return null;\r\n      instance.constructorInstance = this.resolveFunction(constructorPartial, null, null, reportMode);\r\n    }\r\n\r\n    // Resolve instance members\r\n    if (prototype.instanceMembers) {\r\n      for (let member of prototype.instanceMembers.values()) {\r\n        switch (member.kind) {\r\n\r\n          // Lay out fields in advance\r\n          case ElementKind.FIELD_PROTOTYPE: {\r\n            if (!instance.members) instance.members = new Map();\r\n            let fieldDeclaration = (<FieldPrototype>member).declaration;\r\n            let fieldType: Type | null = null;\r\n            // TODO: handle duplicate non-private fields\r\n            if (!fieldDeclaration.type) {\r\n              if (baseClass !== null && baseClass.members !== null) {\r\n                let baseField = baseClass.members.get((<FieldPrototype>member).simpleName);\r\n                if (baseField && !baseField.is(CommonFlags.PRIVATE)) {\r\n                  assert(baseField.kind == ElementKind.FIELD);\r\n                  fieldType = (<Field>baseField).type;\r\n                }\r\n              }\r\n              if (!fieldType) {\r\n                if (reportMode == ReportMode.REPORT) {\r\n                  this.error(\r\n                    DiagnosticCode.Type_expected,\r\n                    fieldDeclaration.name.range.atEnd\r\n                  );\r\n                }\r\n              }\r\n            } else {\r\n              fieldType = this.resolveType(\r\n                fieldDeclaration.type,\r\n                instance.contextualTypeArguments,\r\n                reportMode\r\n              );\r\n            }\r\n            if (!fieldType) break;\r\n            let fieldInstance = new Field(\r\n              <FieldPrototype>member,\r\n              internalName + INSTANCE_DELIMITER + (<FieldPrototype>member).simpleName,\r\n              fieldType,\r\n              fieldDeclaration,\r\n              instance\r\n            );\r\n            switch (fieldType.byteSize) { // align\r\n              case 1: break;\r\n              case 2: { if (memoryOffset & 1) ++memoryOffset; break; }\r\n              case 4: { if (memoryOffset & 3) memoryOffset = (memoryOffset | 3) + 1; break; }\r\n              case 8: { if (memoryOffset & 7) memoryOffset = (memoryOffset | 7) + 1; break; }\r\n              default: assert(false);\r\n            }\r\n            fieldInstance.memoryOffset = memoryOffset;\r\n            memoryOffset += fieldType.byteSize;\r\n            instance.members.set(member.simpleName, fieldInstance);\r\n            break;\r\n          }\r\n\r\n          // Partially resolve methods as these might have type arguments on their own\r\n          case ElementKind.FUNCTION_PROTOTYPE: {\r\n            if (!instance.members) instance.members = new Map();\r\n            let partialPrototype = this.resolveFunctionPartially(\r\n              <FunctionPrototype>member,\r\n              typeArguments,\r\n              reportMode\r\n            );\r\n            if (!partialPrototype) return null;\r\n            partialPrototype.internalName = internalName + INSTANCE_DELIMITER + partialPrototype.simpleName;\r\n            instance.members.set(member.simpleName, partialPrototype);\r\n            break;\r\n          }\r\n\r\n          // Clone properties and partially resolve the wrapped accessors for consistence with other methods\r\n          case ElementKind.PROPERTY: {\r\n            if (!instance.members) instance.members = new Map();\r\n            let getterPrototype = assert((<Property>member).getterPrototype); // must be present\r\n            let setterPrototype = (<Property>member).setterPrototype;         // might be present\r\n            let instanceProperty = new Property(\r\n              this.program,\r\n              member.simpleName,\r\n              internalName + INSTANCE_DELIMITER + member.simpleName,\r\n              prototype\r\n            );\r\n            let partialGetterPrototype = this.resolveFunctionPartially(\r\n              getterPrototype,\r\n              typeArguments,\r\n              reportMode\r\n            );\r\n            if (!partialGetterPrototype) return null;\r\n            partialGetterPrototype\r\n              .internalName = internalName + INSTANCE_DELIMITER + partialGetterPrototype.simpleName;\r\n            instanceProperty.getterPrototype = partialGetterPrototype;\r\n            if (setterPrototype) {\r\n              let partialSetterPrototype = this.resolveFunctionPartially(\r\n                setterPrototype,\r\n                typeArguments,\r\n                reportMode\r\n              );\r\n              if (!partialSetterPrototype) return null;\r\n              partialSetterPrototype\r\n                .internalName = internalName + INSTANCE_DELIMITER + partialSetterPrototype.simpleName;\r\n              instanceProperty.setterPrototype = partialSetterPrototype;\r\n            }\r\n            instance.members.set(member.simpleName, instanceProperty);\r\n            break;\r\n          }\r\n          default: assert(false);\r\n        }\r\n      }\r\n    }\r\n\r\n    // Finalize memory offset\r\n    instance.currentMemoryOffset = memoryOffset;\r\n\r\n    // Fully resolve operator overloads (don't have type parameters on their own)\r\n    for (let [kind, overloadPrototype] of prototype.overloadPrototypes) {\r\n      assert(kind != OperatorKind.INVALID);\r\n      let operatorInstance: Function | null;\r\n      if (overloadPrototype.is(CommonFlags.INSTANCE)) {\r\n        let operatorPartial = this.resolveFunctionPartially(\r\n          overloadPrototype,\r\n          typeArguments,\r\n          reportMode\r\n        );\r\n        if (!operatorPartial) continue;\r\n        operatorInstance = this.resolveFunction(operatorPartial, null, null, reportMode);\r\n      } else {\r\n        operatorInstance = this.resolveFunction(overloadPrototype, null, null, reportMode);\r\n      }\r\n      if (!operatorInstance) continue;\r\n      let overloads = instance.overloads;\r\n      if (!overloads) instance.overloads = overloads = new Map();\r\n      overloads.set(kind, operatorInstance);\r\n    }\r\n    return instance;\r\n  }\r\n\r\n  /** Resolves a class prototype by first resolving the specified type arguments. */\r\n  resolveClassInclTypeArguments(\r\n    prototype: ClassPrototype,\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    reportNode: Node,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Class | null {\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n\r\n    // Resolve type arguments if generic\r\n    if (prototype.is(CommonFlags.GENERIC)) {\r\n      let typeParameterNodes = prototype.declaration.typeParameters;\r\n      let expectedTypeArguments = typeParameterNodes.length;\r\n      assert(expectedTypeArguments > 0);\r\n      let actualTypeArguments = typeArgumentNodes !== null ? typeArgumentNodes.length : 0;\r\n      if (expectedTypeArguments != actualTypeArguments) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, expectedTypeArguments.toString(10), actualTypeArguments.toString(10)\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      resolvedTypeArguments = this.resolveTypeArguments(\r\n        typeParameterNodes,\r\n        typeArgumentNodes,\r\n        contextualTypeArguments,\r\n        reportNode,\r\n        reportMode\r\n      );\r\n      if (!resolvedTypeArguments) return null;\r\n\r\n    // Otherwise make sure that no type arguments have been specified\r\n    } else {\r\n      if (typeArgumentNodes !== null && typeArgumentNodes.length) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.error(\r\n            DiagnosticCode.Type_0_is_not_generic,\r\n            reportNode.range, prototype.internalName\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n    }\r\n\r\n    // Continue with concrete types\r\n    return this.resolveClass(\r\n      prototype,\r\n      resolvedTypeArguments,\r\n      contextualTypeArguments,\r\n      reportMode\r\n    );\r\n  }\r\n}\r\n","/**\r\n * JavaScript glue code.\r\n * @module glue/js\r\n * @preferred\r\n *//***/\r\n\r\n/// <reference path=\"./node.d.ts\" />\r\n\r\nimport \"./binaryen\"; // must be first so portable can pick up the memory implementation\r\nimport \"../../../std/portable/index\";\r\nimport \"./float\";\r\nimport \"./i64\";\r\n\r\nimport { Module } from \"../../module\";\r\n\r\nModule.prototype.toText = function(this: Module) {\r\n  return new binaryen.Module(this.ref).emitText();\r\n};\r\n\r\nModule.prototype.toAsmjs = function(this: Module) {\r\n  return new binaryen.Module(this.ref).emitAsmjs();\r\n};\r\n","// Copy Binaryen exports to global scope\r\n\r\nconst binaryen = global.Binaryen || require(\"binaryen\");\r\nglobal.binaryen = binaryen;\r\n\r\nfor (var key in binaryen) {\r\n  if (key.startsWith(\"_Binaryen\") || key.startsWith(\"_Relooper\")) global[key] = binaryen[key];\r\n}\r\n\r\n// Utilize Binaryen's heap\r\n\r\nglobal.__memory_allocate = binaryen._malloc;\r\nglobal.__memory_free = binaryen._free;\r\nglobal.__memory_copy = binaryen._memmove;\r\nglobal.__store = function(ptr, val) { binaryen.HEAPU8[ptr] = val; };\r\nglobal.__load = function(ptr) { return binaryen.HEAPU8[ptr]; };\r\n","module.exports = __WEBPACK_EXTERNAL_MODULE__15__;","/** @module std/portable *//***/\r\n\r\nvar globalScope = typeof window !== \"undefined\" && window || typeof global !== \"undefined\" && global || self;\r\n\r\nglobalScope.ASC_TARGET = 0;\r\n\r\nObject.defineProperties(\r\n  globalScope[\"i8\"] = function i8(value) { return value << 24 >> 24; }\r\n, {\r\n  \"MIN_VALUE\": { value: -128, writable: false },\r\n  \"MAX_VALUE\": { value: 127, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"i16\"] = function i16(value) { return value << 16 >> 16; }\r\n, {\r\n  \"MIN_VALUE\": { value: -32768, writable: false },\r\n  \"MAX_VALUE\": { value: 32767, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"i32\"] = globalScope[\"isize\"] = function i32(value) { return value | 0; }\r\n, {\r\n  \"MIN_VALUE\": { value: -2147483648, writable: false },\r\n  \"MAX_VALUE\": { value: 2147483647, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"u8\"] = function u8(value) { return value & 0xff; }\r\n, {\r\n  \"MIN_VALUE\": { value: 0, writable: false },\r\n  \"MAX_VALUE\": { value: 255, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"u16\"] = function u16(value) { return value & 0xffff; }\r\n, {\r\n  \"MIN_VALUE\": { value: 0, writable: false },\r\n  \"MAX_VALUE\": { value: 65535, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"u32\"] = globalScope[\"usize\"] = function u32(value) { return value >>> 0; }\r\n, {\r\n  \"MIN_VALUE\": { value: 0, writable: false },\r\n  \"MAX_VALUE\": { value: 4294967295, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"bool\"] = function bool(value) { return !!value; }\r\n, {\r\n  \"MIN_VALUE\": { value: 0, writable: false },\r\n  \"MAX_VALUE\": { value: 1, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"f32\"] = function f32(value) { return Math.fround(value); }\r\n, {\r\n  \"MIN_VALUE\": { value: Math.fround(-3.40282347e+38), writable: false },\r\n  \"MAX_VALUE\": { value: Math.fround(3.40282347e+38), writable: false },\r\n  \"MIN_POSITIVE_VALUE\": { value: Math.fround(1.175494351e-38), writable: false },\r\n  \"MIN_SAFE_INTEGER\": { value: -16777215, writable: false },\r\n  \"MAX_SAFE_INTEGER\": { value: 16777215, writable: false },\r\n  \"EPSILON\": { value: Math.fround(1.19209290e-07), writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"f64\"] = function f64(value) { return +value; }\r\n, {\r\n  \"MIN_VALUE\": { value: -1.7976931348623157e+308, writable: false },\r\n  \"MAX_VALUE\": { value: 1.7976931348623157e+308, writable: false },\r\n  \"MIN_POSITIVE_VALUE\": { value: 2.2250738585072014e-308 , writable: false },\r\n  \"MIN_SAFE_INTEGER\": { value: -9007199254740991, writable: false },\r\n  \"MAX_SAFE_INTEGER\": { value: 9007199254740991, writable: false },\r\n  \"EPSILON\": { value: 2.2204460492503131e-16, writable: false }\r\n});\r\n\r\nglobalScope[\"clz\"] = Math.clz32;\r\n\r\nglobalScope[\"ctz\"] = function ctz(value) {\r\n  var c = Math.clz32(value & -value);\r\n  return value ? 31 - c : c;\r\n};\r\n\r\nglobalScope[\"popcnt\"] = function popcnt(value) {\r\n  value -= value >>> 1 & 0x55555555;\r\n  value = (value & 0x33333333) + (value >>> 2 & 0x33333333);\r\n  return (((value + (value >>> 4)) & 0x0F0F0F0F) * 0x01010101) >>> 24;\r\n};\r\n\r\nglobalScope[\"rotl\"] = function rotl(value, shift) {\r\n  shift &= 31;\r\n  return (value << shift) | (value >>> (32 - shift));\r\n};\r\n\r\nglobalScope[\"rotr\"] = function rotr(value, shift) {\r\n  shift &= 31;\r\n  return (value >>> shift) | (value << (32 - shift));\r\n};\r\n\r\nglobalScope[\"abs\"] = Math.abs;\r\n\r\nglobalScope[\"max\"] = Math.max;\r\n\r\nglobalScope[\"min\"] = Math.min;\r\n\r\nglobalScope[\"ceil\"] = Math.ceil;\r\n\r\nglobalScope[\"floor\"] = Math.floor;\r\n\r\n// Adopt code from https://github.com/rfk/wasm-polyfill\r\nglobalScope[\"nearest\"] = function nearest(value) {\r\n  if (Math.abs(value - Math.trunc(value)) === 0.5) {\r\n    return 2.0 * Math.round(value * 0.5);\r\n  }\r\n  return Math.round(value);\r\n};\r\n\r\nglobalScope[\"select\"] = function select(ifTrue, ifFalse, condition) {\r\n  return condition ? ifTrue : ifFalse;\r\n};\r\n\r\nglobalScope[\"sqrt\"] = Math.sqrt;\r\n\r\nglobalScope[\"trunc\"] = Math.trunc;\r\n\r\nglobalScope[\"copysign\"] = function copysign(x, y) {\r\n  return Math.abs(x) * Math.sign(y);\r\n};\r\n\r\nglobalScope[\"bswap\"] = function bswap(value) {\r\n  var a = value >> 8 & 0x00FF00FF;\r\n  var b = (value & 0x00FF00FF) << 8;\r\n  value = a | b;\r\n  a = value >> 16 & 0x0000FFFF;\r\n  b = (value & 0x0000FFFF) << 16;\r\n  return a | b;\r\n};\r\n\r\nglobalScope[\"bswap16\"] = function bswap16(value) {\r\n  return ((value << 8) & 0xFF00) | ((value >> 8) & 0x00FF) | (value & 0xFFFF0000);\r\n};\r\n\r\nfunction UnreachableError() {\r\n  if (Error.captureStackTrace) {\r\n    Error.captureStackTrace(this, UnreachableError);\r\n  } else {\r\n    this.stack = this.name + \": \" + this.message + \"\\n\" + new Error().stack;\r\n  }\r\n}\r\nUnreachableError.prototype = Object.create(Error.prototype);\r\nUnreachableError.prototype.name = \"UnreachableError\";\r\nUnreachableError.prototype.message = \"unreachable\";\r\n\r\nglobalScope[\"unreachable\"] = function unreachable() {\r\n  throw new UnreachableError();\r\n};\r\n\r\nfunction AssertionError(message) {\r\n  this.message = message || \"assertion failed\";\r\n  if (Error.captureStackTrace) {\r\n    Error.captureStackTrace(this, AssertionError);\r\n  } else {\r\n    this.stack = this.name + \": \" + this.message + \"\\n\" + new Error().stack;\r\n  }\r\n}\r\nAssertionError.prototype = Object.create(Error.prototype);\r\nAssertionError.prototype.name = \"AssertionError\";\r\n\r\nglobalScope[\"assert\"] = function assert(isTrueish, message) {\r\n  if (isTrueish) return isTrueish;\r\n  throw new AssertionError(message);\r\n};\r\n\r\nglobalScope[\"changetype\"] = function changetype(value) {\r\n  return value;\r\n};\r\n\r\nglobalScope[\"parseI32\"] = function parseI32(str, radix) {\r\n  return parseInt(str, undefined) | 0;\r\n};\r\n\r\nString[\"fromCharCodes\"] = function fromCharCodes(arr) {\r\n  return String.fromCharCode.apply(String, arr);\r\n};\r\n\r\nString[\"fromCodePoints\"] = function fromCodePoints(arr) {\r\n  return String.fromCodePoint.apply(String, arr);\r\n};\r\n\r\nglobalScope[\"isInteger\"] = Number.isInteger;\r\n\r\nglobalScope[\"isFloat\"] = function isFloat(arg) {\r\n  return typeof arg === \"number\";\r\n};\r\n\r\nglobalScope[\"isReference\"] = function isClass(arg) {\r\n  return typeof arg === \"object\" || typeof arg === \"string\";\r\n};\r\n\r\nglobalScope[\"isString\"] = function isString(arg) {\r\n  return typeof arg === \"string\" || arg instanceof String;\r\n};\r\n\r\nglobalScope[\"isArray\"] = Array.isArray;\r\n\r\nglobalScope[\"unchecked\"] = function(expr) {\r\n  return expr;\r\n};\r\n\r\nglobalScope[\"fmod\"] = function fmod(x, y) {\r\n  return x % y;\r\n};\r\n\r\nglobalScope[\"fmodf\"] = function fmodf(x, y) {\r\n  return Math.fround(x % y);\r\n};\r\n\r\nglobalScope[\"JSMath\"] = Math;\r\n\r\nglobalScope[\"memory\"] = (() => {\r\n  var HEAP = new Uint8Array(0);\r\n  var HEAP_OFFSET = 0;\r\n  return {\r\n    allocate: globalScope[\"__memory_allocate\"] || function allocate(size) {\r\n      if (!(size >>>= 0)) return 0;\r\n      if (HEAP_OFFSET + size > HEAP.length) {\r\n        var oldHeap = HEAP;\r\n        HEAP = new Uint8Array(Math.max(65536, HEAP.length + size, HEAP.length * 2));\r\n        HEAP.set(oldHeap);\r\n      }\r\n      var ptr = HEAP_OFFSET;\r\n      if ((HEAP_OFFSET += size) & 7) HEAP_OFFSET = (HEAP_OFFSET | 7) + 1;\r\n      return ptr;\r\n    },\r\n    free: globalScope[\"__memory_free\"] || function free(ptr) { },\r\n    copy: globalScope[\"__memory_copy\"] || function copy(dest, src, size) {\r\n      HEAP.copyWithin(dest, src, src + size);\r\n    }\r\n  };\r\n})();\r\n\r\nglobalScope[\"store\"] = globalScope[\"__store\"] || function store(ptr, value, offset) {\r\n  HEAP[ptr + (offset | 0)] = value;\r\n};\r\n\r\nglobalScope[\"load\"] = globalScope[\"__load\"] || function load(ptr, offset) {\r\n  return HEAP[ptr + (offset | 0)];\r\n};\r\n","const F64 = new Float64Array(1);\r\nconst F32 = new Float32Array(F64.buffer);\r\nconst I32 = new Int32Array(F64.buffer);\r\n\r\nglobal.f32_as_i32 = function(value) {\r\n  F32[0] = value;\r\n  return I32[0];\r\n};\r\n\r\nglobal.i32_as_f32 = function(value) {\r\n  I32[0] = value;\r\n  return F32[0];\r\n};\r\n\r\nglobal.f64_as_i64 = function(value) {\r\n  F64[0] = value;\r\n  return i64_new(I32[0], I32[1]);\r\n};\r\n\r\nglobal.i64_as_f64 = function(value) {\r\n  I32[0] = i64_low(value);\r\n  I32[1] = i64_high(value);\r\n  return F64[0];\r\n};\r\n","const Long = global.Long || require(\"long\");\r\n\r\nglobal.i64_zero = Long.ZERO;\r\n\r\nglobal.i64_one = Long.ONE;\r\n\r\nglobal.i64_new = function(lo, hi) {\r\n  return Long.fromBits(lo, hi);\r\n};\r\n\r\nglobal.i64_low = function(value) {\r\n  return value.low;\r\n};\r\n\r\nglobal.i64_high = function(value) {\r\n  return value.high;\r\n};\r\n\r\nglobal.i64_add = function(left, right) {\r\n  return left.add(right);\r\n};\r\n\r\nglobal.i64_sub = function(left, right) {\r\n  return left.sub(right);\r\n};\r\n\r\nglobal.i64_mul = function(left, right) {\r\n  return left.mul(right);\r\n};\r\n\r\nglobal.i64_div = function(left, right) {\r\n  return left.div(right);\r\n};\r\n\r\nglobal.i64_div_u = function(left, right) {\r\n  return left.toUnsigned().div(right.toUnsigned()).toSigned();\r\n};\r\n\r\nglobal.i64_rem = function(left, right) {\r\n  return left.mod(right);\r\n};\r\n\r\nglobal.i64_rem_u = function(left, right) {\r\n  return left.toUnsigned().mod(right.toUnsigned()).toSigned();\r\n};\r\n\r\nglobal.i64_and = function(left, right) {\r\n  return left.and(right);\r\n};\r\n\r\nglobal.i64_or = function(left, right) {\r\n  return left.or(right);\r\n};\r\n\r\nglobal.i64_xor = function(left, right) {\r\n  return left.xor(right);\r\n};\r\n\r\nglobal.i64_shl = function(left, right) {\r\n  return left.shl(right);\r\n};\r\n\r\nglobal.i64_shr = function(left, right) {\r\n  return left.shr(right);\r\n};\r\n\r\nglobal.i64_shr_u = function(left, right) {\r\n  return left.shru(right);\r\n};\r\n\r\nglobal.i64_not = function(value) {\r\n  return value.not();\r\n};\r\n\r\nglobal.i64_eq = function(left, right) {\r\n  return left.eq(right);\r\n};\r\n\r\nglobal.i64_ne = function(left, right) {\r\n  return left.ne(right);\r\n};\r\n\r\nglobal.i64_align = function(value, alignment) {\r\n  assert(alignment && (alignment & (alignment - 1)) == 0);\r\n  var mask = Long.fromInt(alignment - 1);\r\n  return value.add(mask).and(mask.not());\r\n};\r\n\r\nglobal.i64_is_i8 = function(value) {\r\n  return value.high === 0 && (value.low >= 0 && value.low <= i8.MAX_VALUE)\r\n      || value.high === -1 && (value.low >= i8.MIN_VALUE && value.low < 0);\r\n};\r\n\r\nglobal.i64_is_i16 = function(value) {\r\n  return value.high === 0 && (value.low >= 0 && value.low <= i16.MAX_VALUE)\r\n      || value.high === -1 && (value.low >= i16.MIN_VALUE && value.low < 0);\r\n};\r\n\r\nglobal.i64_is_i32 = function(value) {\r\n  return (value.high === 0 && value.low >= 0)\r\n      || (value.high === -1 && value.low < 0);\r\n};\r\n\r\nglobal.i64_is_u8 = function(value) {\r\n  return value.high === 0 && value.low >= 0 && value.low <= u8.MAX_VALUE;\r\n};\r\n\r\nglobal.i64_is_u16 = function(value) {\r\n  return value.high === 0 && value.low >= 0 && value.low <= u16.MAX_VALUE;\r\n};\r\n\r\nglobal.i64_is_u32 = function(value) {\r\n  return value.high === 0;\r\n};\r\n\r\nglobal.i64_is_bool = function(value) {\r\n  return value.high === 0 && (value.low === 0 || value.low === 1);\r\n};\r\n\r\nconst minSafeF32 = Long.fromNumber(f32.MIN_SAFE_INTEGER);\r\nconst maxSafeF32 = Long.fromNumber(f32.MAX_SAFE_INTEGER);\r\n\r\nglobal.i64_is_f32 = function(value) {\r\n  return value.gte(minSafeF32) && value.lte(maxSafeF32);\r\n};\r\n\r\nconst minSafeF64 = Long.fromNumber(f64.MIN_SAFE_INTEGER);\r\nconst maxSafeF64 = Long.fromNumber(f64.MAX_SAFE_INTEGER);\r\n\r\nglobal.i64_is_f64 = function(value) {\r\n  return value.gte(minSafeF64) && value.lte(maxSafeF64);\r\n};\r\n\r\nglobal.i64_to_f32 = function(value) {\r\n  return global.Math.fround(value.toNumber());\r\n};\r\n\r\nglobal.i64_to_f64 = function(value) {\r\n  return value.toNumber();\r\n};\r\n\r\nglobal.i64_to_string = function(value, unsigned) {\r\n  return (unsigned ? value.toUnsigned() : value).toString(10);\r\n};\r\n","module.exports = Long;\r\n\r\n/**\r\n * wasm optimizations, to do native i64 multiplication and divide\r\n */\r\nvar wasm = null;\r\n\r\ntry {\r\n  wasm = new WebAssembly.Instance(new WebAssembly.Module(new Uint8Array([\r\n    0, 97, 115, 109, 1, 0, 0, 0, 1, 13, 2, 96, 0, 1, 127, 96, 4, 127, 127, 127, 127, 1, 127, 3, 7, 6, 0, 1, 1, 1, 1, 1, 6, 6, 1, 127, 1, 65, 0, 11, 7, 50, 6, 3, 109, 117, 108, 0, 1, 5, 100, 105, 118, 95, 115, 0, 2, 5, 100, 105, 118, 95, 117, 0, 3, 5, 114, 101, 109, 95, 115, 0, 4, 5, 114, 101, 109, 95, 117, 0, 5, 8, 103, 101, 116, 95, 104, 105, 103, 104, 0, 0, 10, 191, 1, 6, 4, 0, 35, 0, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 126, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 127, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 128, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 129, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 130, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11\r\n  ])), {}).exports;\r\n} catch (e) {\r\n  // no wasm support :(\r\n}\r\n\r\n/**\r\n * Constructs a 64 bit two's-complement integer, given its low and high 32 bit values as *signed* integers.\r\n *  See the from* functions below for more convenient ways of constructing Longs.\r\n * @exports Long\r\n * @class A Long class for representing a 64 bit two's-complement integer value.\r\n * @param {number} low The low (signed) 32 bits of the long\r\n * @param {number} high The high (signed) 32 bits of the long\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @constructor\r\n */\r\nfunction Long(low, high, unsigned) {\r\n\r\n    /**\r\n     * The low 32 bits as a signed value.\r\n     * @type {number}\r\n     */\r\n    this.low = low | 0;\r\n\r\n    /**\r\n     * The high 32 bits as a signed value.\r\n     * @type {number}\r\n     */\r\n    this.high = high | 0;\r\n\r\n    /**\r\n     * Whether unsigned or not.\r\n     * @type {boolean}\r\n     */\r\n    this.unsigned = !!unsigned;\r\n}\r\n\r\n// The internal representation of a long is the two given signed, 32-bit values.\r\n// We use 32-bit pieces because these are the size of integers on which\r\n// Javascript performs bit-operations.  For operations like addition and\r\n// multiplication, we split each number into 16 bit pieces, which can easily be\r\n// multiplied within Javascript's floating-point representation without overflow\r\n// or change in sign.\r\n//\r\n// In the algorithms below, we frequently reduce the negative case to the\r\n// positive case by negating the input(s) and then post-processing the result.\r\n// Note that we must ALWAYS check specially whether those values are MIN_VALUE\r\n// (-2^63) because -MIN_VALUE == MIN_VALUE (since 2^63 cannot be represented as\r\n// a positive number, it overflows back into a negative).  Not handling this\r\n// case would often result in infinite recursion.\r\n//\r\n// Common constant values ZERO, ONE, NEG_ONE, etc. are defined below the from*\r\n// methods on which they depend.\r\n\r\n/**\r\n * An indicator used to reliably determine if an object is a Long or not.\r\n * @type {boolean}\r\n * @const\r\n * @private\r\n */\r\nLong.prototype.__isLong__;\r\n\r\nObject.defineProperty(Long.prototype, \"__isLong__\", { value: true });\r\n\r\n/**\r\n * @function\r\n * @param {*} obj Object\r\n * @returns {boolean}\r\n * @inner\r\n */\r\nfunction isLong(obj) {\r\n    return (obj && obj[\"__isLong__\"]) === true;\r\n}\r\n\r\n/**\r\n * Tests if the specified object is a Long.\r\n * @function\r\n * @param {*} obj Object\r\n * @returns {boolean}\r\n */\r\nLong.isLong = isLong;\r\n\r\n/**\r\n * A cache of the Long representations of small integer values.\r\n * @type {!Object}\r\n * @inner\r\n */\r\nvar INT_CACHE = {};\r\n\r\n/**\r\n * A cache of the Long representations of small unsigned integer values.\r\n * @type {!Object}\r\n * @inner\r\n */\r\nvar UINT_CACHE = {};\r\n\r\n/**\r\n * @param {number} value\r\n * @param {boolean=} unsigned\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromInt(value, unsigned) {\r\n    var obj, cachedObj, cache;\r\n    if (unsigned) {\r\n        value >>>= 0;\r\n        if (cache = (0 <= value && value < 256)) {\r\n            cachedObj = UINT_CACHE[value];\r\n            if (cachedObj)\r\n                return cachedObj;\r\n        }\r\n        obj = fromBits(value, (value | 0) < 0 ? -1 : 0, true);\r\n        if (cache)\r\n            UINT_CACHE[value] = obj;\r\n        return obj;\r\n    } else {\r\n        value |= 0;\r\n        if (cache = (-128 <= value && value < 128)) {\r\n            cachedObj = INT_CACHE[value];\r\n            if (cachedObj)\r\n                return cachedObj;\r\n        }\r\n        obj = fromBits(value, value < 0 ? -1 : 0, false);\r\n        if (cache)\r\n            INT_CACHE[value] = obj;\r\n        return obj;\r\n    }\r\n}\r\n\r\n/**\r\n * Returns a Long representing the given 32 bit integer value.\r\n * @function\r\n * @param {number} value The 32 bit integer in question\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {!Long} The corresponding Long value\r\n */\r\nLong.fromInt = fromInt;\r\n\r\n/**\r\n * @param {number} value\r\n * @param {boolean=} unsigned\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromNumber(value, unsigned) {\r\n    if (isNaN(value))\r\n        return unsigned ? UZERO : ZERO;\r\n    if (unsigned) {\r\n        if (value < 0)\r\n            return UZERO;\r\n        if (value >= TWO_PWR_64_DBL)\r\n            return MAX_UNSIGNED_VALUE;\r\n    } else {\r\n        if (value <= -TWO_PWR_63_DBL)\r\n            return MIN_VALUE;\r\n        if (value + 1 >= TWO_PWR_63_DBL)\r\n            return MAX_VALUE;\r\n    }\r\n    if (value < 0)\r\n        return fromNumber(-value, unsigned).neg();\r\n    return fromBits((value % TWO_PWR_32_DBL) | 0, (value / TWO_PWR_32_DBL) | 0, unsigned);\r\n}\r\n\r\n/**\r\n * Returns a Long representing the given value, provided that it is a finite number. Otherwise, zero is returned.\r\n * @function\r\n * @param {number} value The number in question\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {!Long} The corresponding Long value\r\n */\r\nLong.fromNumber = fromNumber;\r\n\r\n/**\r\n * @param {number} lowBits\r\n * @param {number} highBits\r\n * @param {boolean=} unsigned\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromBits(lowBits, highBits, unsigned) {\r\n    return new Long(lowBits, highBits, unsigned);\r\n}\r\n\r\n/**\r\n * Returns a Long representing the 64 bit integer that comes by concatenating the given low and high bits. Each is\r\n *  assumed to use 32 bits.\r\n * @function\r\n * @param {number} lowBits The low 32 bits\r\n * @param {number} highBits The high 32 bits\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {!Long} The corresponding Long value\r\n */\r\nLong.fromBits = fromBits;\r\n\r\n/**\r\n * @function\r\n * @param {number} base\r\n * @param {number} exponent\r\n * @returns {number}\r\n * @inner\r\n */\r\nvar pow_dbl = Math.pow; // Used 4 times (4*8 to 15+4)\r\n\r\n/**\r\n * @param {string} str\r\n * @param {(boolean|number)=} unsigned\r\n * @param {number=} radix\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromString(str, unsigned, radix) {\r\n    if (str.length === 0)\r\n        throw Error('empty string');\r\n    if (str === \"NaN\" || str === \"Infinity\" || str === \"+Infinity\" || str === \"-Infinity\")\r\n        return ZERO;\r\n    if (typeof unsigned === 'number') {\r\n        // For goog.math.long compatibility\r\n        radix = unsigned,\r\n        unsigned = false;\r\n    } else {\r\n        unsigned = !! unsigned;\r\n    }\r\n    radix = radix || 10;\r\n    if (radix < 2 || 36 < radix)\r\n        throw RangeError('radix');\r\n\r\n    var p;\r\n    if ((p = str.indexOf('-')) > 0)\r\n        throw Error('interior hyphen');\r\n    else if (p === 0) {\r\n        return fromString(str.substring(1), unsigned, radix).neg();\r\n    }\r\n\r\n    // Do several (8) digits each time through the loop, so as to\r\n    // minimize the calls to the very expensive emulated div.\r\n    var radixToPower = fromNumber(pow_dbl(radix, 8));\r\n\r\n    var result = ZERO;\r\n    for (var i = 0; i < str.length; i += 8) {\r\n        var size = Math.min(8, str.length - i),\r\n            value = parseInt(str.substring(i, i + size), radix);\r\n        if (size < 8) {\r\n            var power = fromNumber(pow_dbl(radix, size));\r\n            result = result.mul(power).add(fromNumber(value));\r\n        } else {\r\n            result = result.mul(radixToPower);\r\n            result = result.add(fromNumber(value));\r\n        }\r\n    }\r\n    result.unsigned = unsigned;\r\n    return result;\r\n}\r\n\r\n/**\r\n * Returns a Long representation of the given string, written using the specified radix.\r\n * @function\r\n * @param {string} str The textual representation of the Long\r\n * @param {(boolean|number)=} unsigned Whether unsigned or not, defaults to signed\r\n * @param {number=} radix The radix in which the text is written (2-36), defaults to 10\r\n * @returns {!Long} The corresponding Long value\r\n */\r\nLong.fromString = fromString;\r\n\r\n/**\r\n * @function\r\n * @param {!Long|number|string|!{low: number, high: number, unsigned: boolean}} val\r\n * @param {boolean=} unsigned\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromValue(val, unsigned) {\r\n    if (typeof val === 'number')\r\n        return fromNumber(val, unsigned);\r\n    if (typeof val === 'string')\r\n        return fromString(val, unsigned);\r\n    // Throws for non-objects, converts non-instanceof Long:\r\n    return fromBits(val.low, val.high, typeof unsigned === 'boolean' ? unsigned : val.unsigned);\r\n}\r\n\r\n/**\r\n * Converts the specified value to a Long using the appropriate from* function for its type.\r\n * @function\r\n * @param {!Long|number|string|!{low: number, high: number, unsigned: boolean}} val Value\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {!Long}\r\n */\r\nLong.fromValue = fromValue;\r\n\r\n// NOTE: the compiler should inline these constant values below and then remove these variables, so there should be\r\n// no runtime penalty for these.\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_16_DBL = 1 << 16;\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_24_DBL = 1 << 24;\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_32_DBL = TWO_PWR_16_DBL * TWO_PWR_16_DBL;\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_64_DBL = TWO_PWR_32_DBL * TWO_PWR_32_DBL;\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_63_DBL = TWO_PWR_64_DBL / 2;\r\n\r\n/**\r\n * @type {!Long}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_24 = fromInt(TWO_PWR_24_DBL);\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar ZERO = fromInt(0);\r\n\r\n/**\r\n * Signed zero.\r\n * @type {!Long}\r\n */\r\nLong.ZERO = ZERO;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar UZERO = fromInt(0, true);\r\n\r\n/**\r\n * Unsigned zero.\r\n * @type {!Long}\r\n */\r\nLong.UZERO = UZERO;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar ONE = fromInt(1);\r\n\r\n/**\r\n * Signed one.\r\n * @type {!Long}\r\n */\r\nLong.ONE = ONE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar UONE = fromInt(1, true);\r\n\r\n/**\r\n * Unsigned one.\r\n * @type {!Long}\r\n */\r\nLong.UONE = UONE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar NEG_ONE = fromInt(-1);\r\n\r\n/**\r\n * Signed negative one.\r\n * @type {!Long}\r\n */\r\nLong.NEG_ONE = NEG_ONE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar MAX_VALUE = fromBits(0xFFFFFFFF|0, 0x7FFFFFFF|0, false);\r\n\r\n/**\r\n * Maximum signed value.\r\n * @type {!Long}\r\n */\r\nLong.MAX_VALUE = MAX_VALUE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar MAX_UNSIGNED_VALUE = fromBits(0xFFFFFFFF|0, 0xFFFFFFFF|0, true);\r\n\r\n/**\r\n * Maximum unsigned value.\r\n * @type {!Long}\r\n */\r\nLong.MAX_UNSIGNED_VALUE = MAX_UNSIGNED_VALUE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar MIN_VALUE = fromBits(0, 0x80000000|0, false);\r\n\r\n/**\r\n * Minimum signed value.\r\n * @type {!Long}\r\n */\r\nLong.MIN_VALUE = MIN_VALUE;\r\n\r\n/**\r\n * @alias Long.prototype\r\n * @inner\r\n */\r\nvar LongPrototype = Long.prototype;\r\n\r\n/**\r\n * Converts the Long to a 32 bit integer, assuming it is a 32 bit integer.\r\n * @returns {number}\r\n */\r\nLongPrototype.toInt = function toInt() {\r\n    return this.unsigned ? this.low >>> 0 : this.low;\r\n};\r\n\r\n/**\r\n * Converts the Long to a the nearest floating-point representation of this value (double, 53 bit mantissa).\r\n * @returns {number}\r\n */\r\nLongPrototype.toNumber = function toNumber() {\r\n    if (this.unsigned)\r\n        return ((this.high >>> 0) * TWO_PWR_32_DBL) + (this.low >>> 0);\r\n    return this.high * TWO_PWR_32_DBL + (this.low >>> 0);\r\n};\r\n\r\n/**\r\n * Converts the Long to a string written in the specified radix.\r\n * @param {number=} radix Radix (2-36), defaults to 10\r\n * @returns {string}\r\n * @override\r\n * @throws {RangeError} If `radix` is out of range\r\n */\r\nLongPrototype.toString = function toString(radix) {\r\n    radix = radix || 10;\r\n    if (radix < 2 || 36 < radix)\r\n        throw RangeError('radix');\r\n    if (this.isZero())\r\n        return '0';\r\n    if (this.isNegative()) { // Unsigned Longs are never negative\r\n        if (this.eq(MIN_VALUE)) {\r\n            // We need to change the Long value before it can be negated, so we remove\r\n            // the bottom-most digit in this base and then recurse to do the rest.\r\n            var radixLong = fromNumber(radix),\r\n                div = this.div(radixLong),\r\n                rem1 = div.mul(radixLong).sub(this);\r\n            return div.toString(radix) + rem1.toInt().toString(radix);\r\n        } else\r\n            return '-' + this.neg().toString(radix);\r\n    }\r\n\r\n    // Do several (6) digits each time through the loop, so as to\r\n    // minimize the calls to the very expensive emulated div.\r\n    var radixToPower = fromNumber(pow_dbl(radix, 6), this.unsigned),\r\n        rem = this;\r\n    var result = '';\r\n    while (true) {\r\n        var remDiv = rem.div(radixToPower),\r\n            intval = rem.sub(remDiv.mul(radixToPower)).toInt() >>> 0,\r\n            digits = intval.toString(radix);\r\n        rem = remDiv;\r\n        if (rem.isZero())\r\n            return digits + result;\r\n        else {\r\n            while (digits.length < 6)\r\n                digits = '0' + digits;\r\n            result = '' + digits + result;\r\n        }\r\n    }\r\n};\r\n\r\n/**\r\n * Gets the high 32 bits as a signed integer.\r\n * @returns {number} Signed high bits\r\n */\r\nLongPrototype.getHighBits = function getHighBits() {\r\n    return this.high;\r\n};\r\n\r\n/**\r\n * Gets the high 32 bits as an unsigned integer.\r\n * @returns {number} Unsigned high bits\r\n */\r\nLongPrototype.getHighBitsUnsigned = function getHighBitsUnsigned() {\r\n    return this.high >>> 0;\r\n};\r\n\r\n/**\r\n * Gets the low 32 bits as a signed integer.\r\n * @returns {number} Signed low bits\r\n */\r\nLongPrototype.getLowBits = function getLowBits() {\r\n    return this.low;\r\n};\r\n\r\n/**\r\n * Gets the low 32 bits as an unsigned integer.\r\n * @returns {number} Unsigned low bits\r\n */\r\nLongPrototype.getLowBitsUnsigned = function getLowBitsUnsigned() {\r\n    return this.low >>> 0;\r\n};\r\n\r\n/**\r\n * Gets the number of bits needed to represent the absolute value of this Long.\r\n * @returns {number}\r\n */\r\nLongPrototype.getNumBitsAbs = function getNumBitsAbs() {\r\n    if (this.isNegative()) // Unsigned Longs are never negative\r\n        return this.eq(MIN_VALUE) ? 64 : this.neg().getNumBitsAbs();\r\n    var val = this.high != 0 ? this.high : this.low;\r\n    for (var bit = 31; bit > 0; bit--)\r\n        if ((val & (1 << bit)) != 0)\r\n            break;\r\n    return this.high != 0 ? bit + 33 : bit + 1;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value equals zero.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isZero = function isZero() {\r\n    return this.high === 0 && this.low === 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value equals zero. This is an alias of {@link Long#isZero}.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.eqz = LongPrototype.isZero;\r\n\r\n/**\r\n * Tests if this Long's value is negative.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isNegative = function isNegative() {\r\n    return !this.unsigned && this.high < 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is positive.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isPositive = function isPositive() {\r\n    return this.unsigned || this.high >= 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is odd.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isOdd = function isOdd() {\r\n    return (this.low & 1) === 1;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is even.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isEven = function isEven() {\r\n    return (this.low & 1) === 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value equals the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.equals = function equals(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    if (this.unsigned !== other.unsigned && (this.high >>> 31) === 1 && (other.high >>> 31) === 1)\r\n        return false;\r\n    return this.high === other.high && this.low === other.low;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value equals the specified's. This is an alias of {@link Long#equals}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.eq = LongPrototype.equals;\r\n\r\n/**\r\n * Tests if this Long's value differs from the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.notEquals = function notEquals(other) {\r\n    return !this.eq(/* validates */ other);\r\n};\r\n\r\n/**\r\n * Tests if this Long's value differs from the specified's. This is an alias of {@link Long#notEquals}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.neq = LongPrototype.notEquals;\r\n\r\n/**\r\n * Tests if this Long's value differs from the specified's. This is an alias of {@link Long#notEquals}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.ne = LongPrototype.notEquals;\r\n\r\n/**\r\n * Tests if this Long's value is less than the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.lessThan = function lessThan(other) {\r\n    return this.comp(/* validates */ other) < 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is less than the specified's. This is an alias of {@link Long#lessThan}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.lt = LongPrototype.lessThan;\r\n\r\n/**\r\n * Tests if this Long's value is less than or equal the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.lessThanOrEqual = function lessThanOrEqual(other) {\r\n    return this.comp(/* validates */ other) <= 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is less than or equal the specified's. This is an alias of {@link Long#lessThanOrEqual}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.lte = LongPrototype.lessThanOrEqual;\r\n\r\n/**\r\n * Tests if this Long's value is less than or equal the specified's. This is an alias of {@link Long#lessThanOrEqual}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.le = LongPrototype.lessThanOrEqual;\r\n\r\n/**\r\n * Tests if this Long's value is greater than the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.greaterThan = function greaterThan(other) {\r\n    return this.comp(/* validates */ other) > 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is greater than the specified's. This is an alias of {@link Long#greaterThan}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.gt = LongPrototype.greaterThan;\r\n\r\n/**\r\n * Tests if this Long's value is greater than or equal the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.greaterThanOrEqual = function greaterThanOrEqual(other) {\r\n    return this.comp(/* validates */ other) >= 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is greater than or equal the specified's. This is an alias of {@link Long#greaterThanOrEqual}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.gte = LongPrototype.greaterThanOrEqual;\r\n\r\n/**\r\n * Tests if this Long's value is greater than or equal the specified's. This is an alias of {@link Long#greaterThanOrEqual}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.ge = LongPrototype.greaterThanOrEqual;\r\n\r\n/**\r\n * Compares this Long's value with the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {number} 0 if they are the same, 1 if the this is greater and -1\r\n *  if the given one is greater\r\n */\r\nLongPrototype.compare = function compare(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    if (this.eq(other))\r\n        return 0;\r\n    var thisNeg = this.isNegative(),\r\n        otherNeg = other.isNegative();\r\n    if (thisNeg && !otherNeg)\r\n        return -1;\r\n    if (!thisNeg && otherNeg)\r\n        return 1;\r\n    // At this point the sign bits are the same\r\n    if (!this.unsigned)\r\n        return this.sub(other).isNegative() ? -1 : 1;\r\n    // Both are positive if at least one is unsigned\r\n    return (other.high >>> 0) > (this.high >>> 0) || (other.high === this.high && (other.low >>> 0) > (this.low >>> 0)) ? -1 : 1;\r\n};\r\n\r\n/**\r\n * Compares this Long's value with the specified's. This is an alias of {@link Long#compare}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {number} 0 if they are the same, 1 if the this is greater and -1\r\n *  if the given one is greater\r\n */\r\nLongPrototype.comp = LongPrototype.compare;\r\n\r\n/**\r\n * Negates this Long's value.\r\n * @returns {!Long} Negated Long\r\n */\r\nLongPrototype.negate = function negate() {\r\n    if (!this.unsigned && this.eq(MIN_VALUE))\r\n        return MIN_VALUE;\r\n    return this.not().add(ONE);\r\n};\r\n\r\n/**\r\n * Negates this Long's value. This is an alias of {@link Long#negate}.\r\n * @function\r\n * @returns {!Long} Negated Long\r\n */\r\nLongPrototype.neg = LongPrototype.negate;\r\n\r\n/**\r\n * Returns the sum of this and the specified Long.\r\n * @param {!Long|number|string} addend Addend\r\n * @returns {!Long} Sum\r\n */\r\nLongPrototype.add = function add(addend) {\r\n    if (!isLong(addend))\r\n        addend = fromValue(addend);\r\n\r\n    // Divide each number into 4 chunks of 16 bits, and then sum the chunks.\r\n\r\n    var a48 = this.high >>> 16;\r\n    var a32 = this.high & 0xFFFF;\r\n    var a16 = this.low >>> 16;\r\n    var a00 = this.low & 0xFFFF;\r\n\r\n    var b48 = addend.high >>> 16;\r\n    var b32 = addend.high & 0xFFFF;\r\n    var b16 = addend.low >>> 16;\r\n    var b00 = addend.low & 0xFFFF;\r\n\r\n    var c48 = 0, c32 = 0, c16 = 0, c00 = 0;\r\n    c00 += a00 + b00;\r\n    c16 += c00 >>> 16;\r\n    c00 &= 0xFFFF;\r\n    c16 += a16 + b16;\r\n    c32 += c16 >>> 16;\r\n    c16 &= 0xFFFF;\r\n    c32 += a32 + b32;\r\n    c48 += c32 >>> 16;\r\n    c32 &= 0xFFFF;\r\n    c48 += a48 + b48;\r\n    c48 &= 0xFFFF;\r\n    return fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the difference of this and the specified Long.\r\n * @param {!Long|number|string} subtrahend Subtrahend\r\n * @returns {!Long} Difference\r\n */\r\nLongPrototype.subtract = function subtract(subtrahend) {\r\n    if (!isLong(subtrahend))\r\n        subtrahend = fromValue(subtrahend);\r\n    return this.add(subtrahend.neg());\r\n};\r\n\r\n/**\r\n * Returns the difference of this and the specified Long. This is an alias of {@link Long#subtract}.\r\n * @function\r\n * @param {!Long|number|string} subtrahend Subtrahend\r\n * @returns {!Long} Difference\r\n */\r\nLongPrototype.sub = LongPrototype.subtract;\r\n\r\n/**\r\n * Returns the product of this and the specified Long.\r\n * @param {!Long|number|string} multiplier Multiplier\r\n * @returns {!Long} Product\r\n */\r\nLongPrototype.multiply = function multiply(multiplier) {\r\n    if (this.isZero())\r\n        return ZERO;\r\n    if (!isLong(multiplier))\r\n        multiplier = fromValue(multiplier);\r\n\r\n    // use wasm support if present\r\n    if (wasm) {\r\n        var low = wasm.mul(this.low,\r\n                           this.high,\r\n                           multiplier.low,\r\n                           multiplier.high);\r\n        return fromBits(low, wasm.get_high(), this.unsigned);\r\n    }\r\n\r\n    if (multiplier.isZero())\r\n        return ZERO;\r\n    if (this.eq(MIN_VALUE))\r\n        return multiplier.isOdd() ? MIN_VALUE : ZERO;\r\n    if (multiplier.eq(MIN_VALUE))\r\n        return this.isOdd() ? MIN_VALUE : ZERO;\r\n\r\n    if (this.isNegative()) {\r\n        if (multiplier.isNegative())\r\n            return this.neg().mul(multiplier.neg());\r\n        else\r\n            return this.neg().mul(multiplier).neg();\r\n    } else if (multiplier.isNegative())\r\n        return this.mul(multiplier.neg()).neg();\r\n\r\n    // If both longs are small, use float multiplication\r\n    if (this.lt(TWO_PWR_24) && multiplier.lt(TWO_PWR_24))\r\n        return fromNumber(this.toNumber() * multiplier.toNumber(), this.unsigned);\r\n\r\n    // Divide each long into 4 chunks of 16 bits, and then add up 4x4 products.\r\n    // We can skip products that would overflow.\r\n\r\n    var a48 = this.high >>> 16;\r\n    var a32 = this.high & 0xFFFF;\r\n    var a16 = this.low >>> 16;\r\n    var a00 = this.low & 0xFFFF;\r\n\r\n    var b48 = multiplier.high >>> 16;\r\n    var b32 = multiplier.high & 0xFFFF;\r\n    var b16 = multiplier.low >>> 16;\r\n    var b00 = multiplier.low & 0xFFFF;\r\n\r\n    var c48 = 0, c32 = 0, c16 = 0, c00 = 0;\r\n    c00 += a00 * b00;\r\n    c16 += c00 >>> 16;\r\n    c00 &= 0xFFFF;\r\n    c16 += a16 * b00;\r\n    c32 += c16 >>> 16;\r\n    c16 &= 0xFFFF;\r\n    c16 += a00 * b16;\r\n    c32 += c16 >>> 16;\r\n    c16 &= 0xFFFF;\r\n    c32 += a32 * b00;\r\n    c48 += c32 >>> 16;\r\n    c32 &= 0xFFFF;\r\n    c32 += a16 * b16;\r\n    c48 += c32 >>> 16;\r\n    c32 &= 0xFFFF;\r\n    c32 += a00 * b32;\r\n    c48 += c32 >>> 16;\r\n    c32 &= 0xFFFF;\r\n    c48 += a48 * b00 + a32 * b16 + a16 * b32 + a00 * b48;\r\n    c48 &= 0xFFFF;\r\n    return fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the product of this and the specified Long. This is an alias of {@link Long#multiply}.\r\n * @function\r\n * @param {!Long|number|string} multiplier Multiplier\r\n * @returns {!Long} Product\r\n */\r\nLongPrototype.mul = LongPrototype.multiply;\r\n\r\n/**\r\n * Returns this Long divided by the specified. The result is signed if this Long is signed or\r\n *  unsigned if this Long is unsigned.\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Quotient\r\n */\r\nLongPrototype.divide = function divide(divisor) {\r\n    if (!isLong(divisor))\r\n        divisor = fromValue(divisor);\r\n    if (divisor.isZero())\r\n        throw Error('division by zero');\r\n\r\n    // use wasm support if present\r\n    if (wasm) {\r\n        // guard against signed division overflow: the largest\r\n        // negative number / -1 would be 1 larger than the largest\r\n        // positive number, due to two's complement.\r\n        if (!this.unsigned &&\r\n            this.high === -0x80000000 &&\r\n            divisor.low === -1 && divisor.high === -1) {\r\n            // be consistent with non-wasm code path\r\n            return this;\r\n        }\r\n        var low = (this.unsigned ? wasm.div_u : wasm.div_s)(\r\n            this.low,\r\n            this.high,\r\n            divisor.low,\r\n            divisor.high\r\n        );\r\n        return fromBits(low, wasm.get_high(), this.unsigned);\r\n    }\r\n\r\n    if (this.isZero())\r\n        return this.unsigned ? UZERO : ZERO;\r\n    var approx, rem, res;\r\n    if (!this.unsigned) {\r\n        // This section is only relevant for signed longs and is derived from the\r\n        // closure library as a whole.\r\n        if (this.eq(MIN_VALUE)) {\r\n            if (divisor.eq(ONE) || divisor.eq(NEG_ONE))\r\n                return MIN_VALUE;  // recall that -MIN_VALUE == MIN_VALUE\r\n            else if (divisor.eq(MIN_VALUE))\r\n                return ONE;\r\n            else {\r\n                // At this point, we have |other| >= 2, so |this/other| < |MIN_VALUE|.\r\n                var halfThis = this.shr(1);\r\n                approx = halfThis.div(divisor).shl(1);\r\n                if (approx.eq(ZERO)) {\r\n                    return divisor.isNegative() ? ONE : NEG_ONE;\r\n                } else {\r\n                    rem = this.sub(divisor.mul(approx));\r\n                    res = approx.add(rem.div(divisor));\r\n                    return res;\r\n                }\r\n            }\r\n        } else if (divisor.eq(MIN_VALUE))\r\n            return this.unsigned ? UZERO : ZERO;\r\n        if (this.isNegative()) {\r\n            if (divisor.isNegative())\r\n                return this.neg().div(divisor.neg());\r\n            return this.neg().div(divisor).neg();\r\n        } else if (divisor.isNegative())\r\n            return this.div(divisor.neg()).neg();\r\n        res = ZERO;\r\n    } else {\r\n        // The algorithm below has not been made for unsigned longs. It's therefore\r\n        // required to take special care of the MSB prior to running it.\r\n        if (!divisor.unsigned)\r\n            divisor = divisor.toUnsigned();\r\n        if (divisor.gt(this))\r\n            return UZERO;\r\n        if (divisor.gt(this.shru(1))) // 15 >>> 1 = 7 ; with divisor = 8 ; true\r\n            return UONE;\r\n        res = UZERO;\r\n    }\r\n\r\n    // Repeat the following until the remainder is less than other:  find a\r\n    // floating-point that approximates remainder / other *from below*, add this\r\n    // into the result, and subtract it from the remainder.  It is critical that\r\n    // the approximate value is less than or equal to the real value so that the\r\n    // remainder never becomes negative.\r\n    rem = this;\r\n    while (rem.gte(divisor)) {\r\n        // Approximate the result of division. This may be a little greater or\r\n        // smaller than the actual value.\r\n        approx = Math.max(1, Math.floor(rem.toNumber() / divisor.toNumber()));\r\n\r\n        // We will tweak the approximate result by changing it in the 48-th digit or\r\n        // the smallest non-fractional digit, whichever is larger.\r\n        var log2 = Math.ceil(Math.log(approx) / Math.LN2),\r\n            delta = (log2 <= 48) ? 1 : pow_dbl(2, log2 - 48),\r\n\r\n        // Decrease the approximation until it is smaller than the remainder.  Note\r\n        // that if it is too large, the product overflows and is negative.\r\n            approxRes = fromNumber(approx),\r\n            approxRem = approxRes.mul(divisor);\r\n        while (approxRem.isNegative() || approxRem.gt(rem)) {\r\n            approx -= delta;\r\n            approxRes = fromNumber(approx, this.unsigned);\r\n            approxRem = approxRes.mul(divisor);\r\n        }\r\n\r\n        // We know the answer can't be zero... and actually, zero would cause\r\n        // infinite recursion since we would make no progress.\r\n        if (approxRes.isZero())\r\n            approxRes = ONE;\r\n\r\n        res = res.add(approxRes);\r\n        rem = rem.sub(approxRem);\r\n    }\r\n    return res;\r\n};\r\n\r\n/**\r\n * Returns this Long divided by the specified. This is an alias of {@link Long#divide}.\r\n * @function\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Quotient\r\n */\r\nLongPrototype.div = LongPrototype.divide;\r\n\r\n/**\r\n * Returns this Long modulo the specified.\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Remainder\r\n */\r\nLongPrototype.modulo = function modulo(divisor) {\r\n    if (!isLong(divisor))\r\n        divisor = fromValue(divisor);\r\n\r\n    // use wasm support if present\r\n    if (wasm) {\r\n        var low = (this.unsigned ? wasm.rem_u : wasm.rem_s)(\r\n            this.low,\r\n            this.high,\r\n            divisor.low,\r\n            divisor.high\r\n        );\r\n        return fromBits(low, wasm.get_high(), this.unsigned);\r\n    }\r\n\r\n    return this.sub(this.div(divisor).mul(divisor));\r\n};\r\n\r\n/**\r\n * Returns this Long modulo the specified. This is an alias of {@link Long#modulo}.\r\n * @function\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Remainder\r\n */\r\nLongPrototype.mod = LongPrototype.modulo;\r\n\r\n/**\r\n * Returns this Long modulo the specified. This is an alias of {@link Long#modulo}.\r\n * @function\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Remainder\r\n */\r\nLongPrototype.rem = LongPrototype.modulo;\r\n\r\n/**\r\n * Returns the bitwise NOT of this Long.\r\n * @returns {!Long}\r\n */\r\nLongPrototype.not = function not() {\r\n    return fromBits(~this.low, ~this.high, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the bitwise AND of this Long and the specified.\r\n * @param {!Long|number|string} other Other Long\r\n * @returns {!Long}\r\n */\r\nLongPrototype.and = function and(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    return fromBits(this.low & other.low, this.high & other.high, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the bitwise OR of this Long and the specified.\r\n * @param {!Long|number|string} other Other Long\r\n * @returns {!Long}\r\n */\r\nLongPrototype.or = function or(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    return fromBits(this.low | other.low, this.high | other.high, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the bitwise XOR of this Long and the given one.\r\n * @param {!Long|number|string} other Other Long\r\n * @returns {!Long}\r\n */\r\nLongPrototype.xor = function xor(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    return fromBits(this.low ^ other.low, this.high ^ other.high, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns this Long with bits shifted to the left by the given amount.\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shiftLeft = function shiftLeft(numBits) {\r\n    if (isLong(numBits))\r\n        numBits = numBits.toInt();\r\n    if ((numBits &= 63) === 0)\r\n        return this;\r\n    else if (numBits < 32)\r\n        return fromBits(this.low << numBits, (this.high << numBits) | (this.low >>> (32 - numBits)), this.unsigned);\r\n    else\r\n        return fromBits(0, this.low << (numBits - 32), this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns this Long with bits shifted to the left by the given amount. This is an alias of {@link Long#shiftLeft}.\r\n * @function\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shl = LongPrototype.shiftLeft;\r\n\r\n/**\r\n * Returns this Long with bits arithmetically shifted to the right by the given amount.\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shiftRight = function shiftRight(numBits) {\r\n    if (isLong(numBits))\r\n        numBits = numBits.toInt();\r\n    if ((numBits &= 63) === 0)\r\n        return this;\r\n    else if (numBits < 32)\r\n        return fromBits((this.low >>> numBits) | (this.high << (32 - numBits)), this.high >> numBits, this.unsigned);\r\n    else\r\n        return fromBits(this.high >> (numBits - 32), this.high >= 0 ? 0 : -1, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns this Long with bits arithmetically shifted to the right by the given amount. This is an alias of {@link Long#shiftRight}.\r\n * @function\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shr = LongPrototype.shiftRight;\r\n\r\n/**\r\n * Returns this Long with bits logically shifted to the right by the given amount.\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shiftRightUnsigned = function shiftRightUnsigned(numBits) {\r\n    if (isLong(numBits))\r\n        numBits = numBits.toInt();\r\n    numBits &= 63;\r\n    if (numBits === 0)\r\n        return this;\r\n    else {\r\n        var high = this.high;\r\n        if (numBits < 32) {\r\n            var low = this.low;\r\n            return fromBits((low >>> numBits) | (high << (32 - numBits)), high >>> numBits, this.unsigned);\r\n        } else if (numBits === 32)\r\n            return fromBits(high, 0, this.unsigned);\r\n        else\r\n            return fromBits(high >>> (numBits - 32), 0, this.unsigned);\r\n    }\r\n};\r\n\r\n/**\r\n * Returns this Long with bits logically shifted to the right by the given amount. This is an alias of {@link Long#shiftRightUnsigned}.\r\n * @function\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shru = LongPrototype.shiftRightUnsigned;\r\n\r\n/**\r\n * Returns this Long with bits logically shifted to the right by the given amount. This is an alias of {@link Long#shiftRightUnsigned}.\r\n * @function\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shr_u = LongPrototype.shiftRightUnsigned;\r\n\r\n/**\r\n * Converts this Long to signed.\r\n * @returns {!Long} Signed long\r\n */\r\nLongPrototype.toSigned = function toSigned() {\r\n    if (!this.unsigned)\r\n        return this;\r\n    return fromBits(this.low, this.high, false);\r\n};\r\n\r\n/**\r\n * Converts this Long to unsigned.\r\n * @returns {!Long} Unsigned long\r\n */\r\nLongPrototype.toUnsigned = function toUnsigned() {\r\n    if (this.unsigned)\r\n        return this;\r\n    return fromBits(this.low, this.high, true);\r\n};\r\n\r\n/**\r\n * Converts this Long to its byte representation.\r\n * @param {boolean=} le Whether little or big endian, defaults to big endian\r\n * @returns {!Array.<number>} Byte representation\r\n */\r\nLongPrototype.toBytes = function toBytes(le) {\r\n    return le ? this.toBytesLE() : this.toBytesBE();\r\n};\r\n\r\n/**\r\n * Converts this Long to its little endian byte representation.\r\n * @returns {!Array.<number>} Little endian byte representation\r\n */\r\nLongPrototype.toBytesLE = function toBytesLE() {\r\n    var hi = this.high,\r\n        lo = this.low;\r\n    return [\r\n        lo        & 0xff,\r\n        lo >>>  8 & 0xff,\r\n        lo >>> 16 & 0xff,\r\n        lo >>> 24       ,\r\n        hi        & 0xff,\r\n        hi >>>  8 & 0xff,\r\n        hi >>> 16 & 0xff,\r\n        hi >>> 24\r\n    ];\r\n};\r\n\r\n/**\r\n * Converts this Long to its big endian byte representation.\r\n * @returns {!Array.<number>} Big endian byte representation\r\n */\r\nLongPrototype.toBytesBE = function toBytesBE() {\r\n    var hi = this.high,\r\n        lo = this.low;\r\n    return [\r\n        hi >>> 24       ,\r\n        hi >>> 16 & 0xff,\r\n        hi >>>  8 & 0xff,\r\n        hi        & 0xff,\r\n        lo >>> 24       ,\r\n        lo >>> 16 & 0xff,\r\n        lo >>>  8 & 0xff,\r\n        lo        & 0xff\r\n    ];\r\n};\r\n\r\n/**\r\n * Creates a Long from its byte representation.\r\n * @param {!Array.<number>} bytes Byte representation\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @param {boolean=} le Whether little or big endian, defaults to big endian\r\n * @returns {Long} The corresponding Long value\r\n */\r\nLong.fromBytes = function fromBytes(bytes, unsigned, le) {\r\n    return le ? Long.fromBytesLE(bytes, unsigned) : Long.fromBytesBE(bytes, unsigned);\r\n};\r\n\r\n/**\r\n * Creates a Long from its little endian byte representation.\r\n * @param {!Array.<number>} bytes Little endian byte representation\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {Long} The corresponding Long value\r\n */\r\nLong.fromBytesLE = function fromBytesLE(bytes, unsigned) {\r\n    return new Long(\r\n        bytes[0]       |\r\n        bytes[1] <<  8 |\r\n        bytes[2] << 16 |\r\n        bytes[3] << 24,\r\n        bytes[4]       |\r\n        bytes[5] <<  8 |\r\n        bytes[6] << 16 |\r\n        bytes[7] << 24,\r\n        unsigned\r\n    );\r\n};\r\n\r\n/**\r\n * Creates a Long from its big endian byte representation.\r\n * @param {!Array.<number>} bytes Big endian byte representation\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {Long} The corresponding Long value\r\n */\r\nLong.fromBytesBE = function fromBytesBE(bytes, unsigned) {\r\n    return new Long(\r\n        bytes[4] << 24 |\r\n        bytes[5] << 16 |\r\n        bytes[6] <<  8 |\r\n        bytes[7],\r\n        bytes[0] << 24 |\r\n        bytes[1] << 16 |\r\n        bytes[2] <<  8 |\r\n        bytes[3],\r\n        unsigned\r\n    );\r\n};\r\n","/**\r\n * Built-in elements providing WebAssembly core functionality.\r\n * @module builtins\r\n *//***/\r\n\r\n import {\r\n  Compiler,\r\n  ConversionKind,\r\n  WrapMode\r\n} from \"./compiler\";\r\n\r\nimport {\r\n  DiagnosticCode\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Node,\r\n  NodeKind,\r\n  Expression,\r\n  LiteralKind,\r\n  LiteralExpression,\r\n  StringLiteralExpression\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Type,\r\n  TypeKind,\r\n  TypeFlags\r\n} from \"./types\";\r\n\r\nimport {\r\n  BinaryOp,\r\n  UnaryOp,\r\n  HostOp,\r\n  NativeType,\r\n  ExpressionRef,\r\n  ExpressionId,\r\n  getExpressionId,\r\n  getExpressionType,\r\n  getConstValueI64High,\r\n  getConstValueI64Low,\r\n  getConstValueI32\r\n} from \"./module\";\r\n\r\nimport {\r\n  ElementKind,\r\n  FunctionPrototype,\r\n  Class,\r\n  Field,\r\n  OperatorKind,\r\n  FlowFlags,\r\n  Global,\r\n  DecoratorFlags\r\n} from \"./program\";\r\n\r\nimport {\r\n  ReportMode\r\n} from \"./resolver\";\r\n\r\nimport {\r\n  CommonFlags\r\n} from \"./common\";\r\n\r\n/** Compiles a call to a built-in function. */\r\nexport function compileCall(\r\n  compiler: Compiler,\r\n  prototype: FunctionPrototype,\r\n  typeArguments: Type[] | null,\r\n  operands: Expression[],\r\n  contextualType: Type,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var module = compiler.module;\r\n\r\n  var arg0: ExpressionRef,\r\n      arg1: ExpressionRef,\r\n      arg2: ExpressionRef,\r\n      ret: ExpressionRef;\r\n\r\n  // NOTE that some implementations below make use of the select expression where straight-forward.\r\n  // whether worth or not should probably be tested once it's known if/how embedders handle it.\r\n  // search: createSelect\r\n\r\n  switch (prototype.internalName) {\r\n\r\n    // types\r\n\r\n    case \"isInteger\": { // isInteger<T!>() / isInteger<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      return type.is(TypeFlags.INTEGER) && !type.is(TypeFlags.REFERENCE)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isFloat\": { // isFloat<T!>() / isFloat<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      return type.is(TypeFlags.FLOAT)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isSigned\": { // isSigned<T!>() / isSigned<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      return type.is(TypeFlags.SIGNED)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isReference\": { // isReference<T!>() / isReference<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      compiler.currentType = Type.bool;\r\n      return type.is(TypeFlags.REFERENCE)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isString\": { // isString<T!>() / isString<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      let classType = type.classReference;\r\n      if (classType) {\r\n        let stringInstance = compiler.program.stringInstance;\r\n        if (stringInstance && classType.isAssignableTo(stringInstance)) return module.createI32(1);\r\n      }\r\n      return module.createI32(0);\r\n    }\r\n    case \"isArray\": { // isArray<T!>() / isArray<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      let classType = type.classReference;\r\n      return classType !== null && classType.lookupOverload(OperatorKind.INDEXED_GET) !== null\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isDefined\": { // isDefined(expression) -> bool\r\n      compiler.currentType = Type.bool;\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let element = compiler.resolver.resolveExpression(operands[0], compiler.currentFunction, ReportMode.SWALLOW);\r\n      return module.createI32(element ? 1 : 0);\r\n    }\r\n    case \"isConstant\": { // isConstant(expression) -> bool\r\n      compiler.currentType = Type.bool;\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let expr = compiler.compileExpressionRetainType(operands[0], Type.i32, WrapMode.NONE);\r\n      compiler.currentType = Type.bool;\r\n      return module.createI32(getExpressionId(expr) == ExpressionId.Const ? 1 : 0);\r\n    }\r\n    case \"isManaged\": { // isManaged<T>() -> bool\r\n      if (!compiler.program.hasGC) {\r\n        compiler.currentType = Type.bool;\r\n        return module.createI32(0);\r\n      }\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      let classType = type.classReference;\r\n      return classType !== null && !classType.hasDecorator(DecoratorFlags.UNMANAGED)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n\r\n    // math\r\n\r\n    case \"clz\": { // clz<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16: {\r\n          ret = module.createUnary(UnaryOp.ClzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.BOOL: // usually overflows\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createUnary(UnaryOp.ClzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createUnary(\r\n            compiler.options.isWasm64\r\n              ? UnaryOp.ClzI64\r\n              : UnaryOp.ClzI32,\r\n            arg0\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createUnary(UnaryOp.ClzI64, arg0);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"ctz\": { // ctz<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.NONE, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16: {\r\n          ret = module.createUnary(UnaryOp.CtzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.BOOL: // usually overflows\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createUnary(UnaryOp.CtzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createUnary(\r\n            compiler.options.isWasm64\r\n              ? UnaryOp.CtzI64\r\n              : UnaryOp.CtzI32,\r\n            arg0\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createUnary(UnaryOp.CtzI64, arg0);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"popcnt\": { // popcnt<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16: {\r\n          ret = module.createUnary(UnaryOp.PopcntI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.BOOL: // usually overflows\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createUnary(UnaryOp.PopcntI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createUnary(\r\n            compiler.options.isWasm64\r\n              ? UnaryOp.PopcntI64\r\n              : UnaryOp.PopcntI32,\r\n            arg0\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createUnary(UnaryOp.PopcntI64, arg0);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"rotl\": { // rotl<T?>(value: T, shift: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.BOOL: {\r\n          ret = compiler.ensureSmallIntegerWrap(\r\n            module.createBinary(BinaryOp.RotlI32, arg0, arg1),\r\n            compiler.currentType\r\n          );\r\n          // fall-through\r\n        }\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createBinary(BinaryOp.RotlI32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createBinary(\r\n            compiler.options.isWasm64\r\n              ? BinaryOp.RotlI64\r\n              : BinaryOp.RotlI32,\r\n            arg0,\r\n            arg1\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createBinary(BinaryOp.RotlI64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret; // possibly overflows\r\n    }\r\n    case \"rotr\": { // rotr<T?>(value: T, shift: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.BOOL: {\r\n          ret = compiler.ensureSmallIntegerWrap(\r\n            module.createBinary(BinaryOp.RotrI32, arg0, arg1),\r\n            compiler.currentType\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createBinary(BinaryOp.RotrI32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createBinary(\r\n            compiler.options.isWasm64\r\n              ? BinaryOp.RotrI64\r\n              : BinaryOp.RotrI32,\r\n            arg0,\r\n            arg1\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createBinary(BinaryOp.RotrI64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret; // possibly overflowws\r\n    }\r\n    case \"abs\": { // abs<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          // possibly overflows, e.g. abs<i8>(-128) == 128\r\n          let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i32, false);\r\n          ret = module.createSelect( // x > 0 ? x : 0-x\r\n            module.createTeeLocal(tempLocal.index, arg0),\r\n            module.createBinary(BinaryOp.SubI32, // ifFalse\r\n              module.createI32(0),\r\n              module.createGetLocal(tempLocal.index, NativeType.I32)\r\n            ),\r\n            module.createBinary(BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal.index, NativeType.I32),\r\n              module.createI32(0)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          let tempLocal = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal.index, arg0),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.SubI64\r\n                : BinaryOp.SubI32,\r\n              compiler.options.usizeType.toNativeZero(module),\r\n              module.createGetLocal(tempLocal.index, compiler.options.nativeSizeType)\r\n            ),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.GtI64\r\n                : BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal.index, compiler.options.nativeSizeType),\r\n              compiler.options.usizeType.toNativeZero(module)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64: {\r\n          let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal.index, arg0),\r\n            module.createBinary(BinaryOp.SubI64,\r\n              module.createI64(0, 0),\r\n              module.createGetLocal(tempLocal.index, NativeType.I64),\r\n            ),\r\n            module.createBinary(BinaryOp.GtI64,\r\n              module.createGetLocal(tempLocal.index, NativeType.I64),\r\n              module.createI64(0, 0)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.U32:\r\n        case TypeKind.U64:\r\n        case TypeKind.BOOL: {\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.AbsF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.AbsF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n        default: { // void\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"max\": { // max<T?>(left: T, right: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          let flow = compiler.currentFunction.flow;\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg0, compiler.currentType)\r\n          );\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg1, compiler.currentType)\r\n          );\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.U32:\r\n        case TypeKind.BOOL: {\r\n          let flow = compiler.currentFunction.flow;\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg0, compiler.currentType)\r\n          );\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg1, compiler.currentType)\r\n          );\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.GtU32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.GtI64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I64)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.U64: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.GtU64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I64)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.GtI64\r\n                : BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType),\r\n              module.createGetLocal(tempLocal1.index, compiler.options.nativeSizeType)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.GtU64\r\n                : BinaryOp.GtU32,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType),\r\n              module.createGetLocal(tempLocal1.index, compiler.options.nativeSizeType)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createBinary(BinaryOp.MaxF32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createBinary(BinaryOp.MaxF64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: { // void\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"min\": { // min<T?>(left: T, right: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          let flow = compiler.currentFunction.flow;\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg0, compiler.currentType)\r\n          );\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg1, compiler.currentType)\r\n          );\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.LtI32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.U32:\r\n        case TypeKind.BOOL: {\r\n          let flow = compiler.currentFunction.flow;\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg0, compiler.currentType)\r\n          );\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg1, compiler.currentType)\r\n          );\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.LtU32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.LtI64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I64)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.U64: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.LtU64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I64)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.LtI64\r\n                : BinaryOp.LtI32,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType),\r\n              module.createGetLocal(tempLocal1.index, compiler.options.nativeSizeType)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.LtU64\r\n                : BinaryOp.LtU32,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType),\r\n              module.createGetLocal(tempLocal1.index, compiler.options.nativeSizeType)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createBinary(BinaryOp.MinF32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createBinary(BinaryOp.MinF64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: { // void\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"ceil\": { // ceil<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: { // any integer\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.CeilF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.CeilF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"floor\": { // floor<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: { // any integer\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.FloorF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.FloorF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"copysign\": { // copysign<T?>(left: T, right: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      switch (compiler.currentType.kind) { // TODO: does an integer version make sense?\r\n        case TypeKind.F32: {\r\n          ret = module.createBinary(BinaryOp.CopysignF32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createBinary(BinaryOp.CopysignF64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"nearest\": { // nearest<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: { // any integer\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.NearestF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.NearestF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"reinterpret\": { // reinterpret<T!>(value: *) -> T\r\n      if (operands.length != 1) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          if (typeArguments && typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        if (typeArguments && typeArguments.length) compiler.currentType = typeArguments[0];\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      switch (typeArguments[0].kind) {\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          arg0 = compiler.compileExpression(operands[0], Type.f32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          ret = module.createUnary(UnaryOp.ReinterpretF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          ret = module.createUnary(UnaryOp.ReinterpretF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (typeArguments[0].is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            compiler.currentType = typeArguments[0];\r\n            return module.createUnreachable();\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          arg0 = compiler.compileExpression(\r\n            operands[0],\r\n            compiler.options.isWasm64\r\n              ? Type.f64\r\n              : Type.f32,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n          ret = module.createUnary(\r\n            compiler.options.isWasm64\r\n              ? UnaryOp.ReinterpretF64\r\n              : UnaryOp.ReinterpretF32,\r\n            arg0\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          ret = module.createUnary(UnaryOp.ReinterpretI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          arg0 = compiler.compileExpression(operands[0], Type.i64, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          ret = module.createUnary(UnaryOp.ReinterpretI64, arg0);\r\n          break;\r\n        }\r\n        default: { // small integers and void\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      compiler.currentType = typeArguments[0];\r\n      return ret;\r\n    }\r\n    case \"sqrt\": { // sqrt<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) { // TODO: integer versions (that return f64 or convert)?\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.SqrtF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.SqrtF64, arg0);\r\n          break;\r\n        }\r\n        // case TypeKind.VOID:\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"trunc\": { // trunc<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments && typeArguments.length) {\r\n        compiler.currentType = typeArguments[0];\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: { // any integer\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        // TODO: truncate to contextual type directly (if not void etc.)?\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.TruncF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.TruncF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n\r\n    // memory access\r\n\r\n    case \"load\": { // load<T!>(offset: usize, constantOffset?: usize) -> *\r\n      if (operands.length < 1 || operands.length > 2) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        if (operands.length < 1) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n            reportNode.range, \"1\", operands.length.toString(10)\r\n          );\r\n        } else {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_arguments_but_got_1,\r\n            reportNode.range, \"2\", operands.length.toString(10)\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        if (typeArguments && typeArguments.length) compiler.currentType = typeArguments[0];\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      let offset = operands.length == 2 ? evaluateConstantOffset(compiler, operands[1]) : 0; // reports\r\n      if (offset < 0) { // reported in evaluateConstantOffset\r\n        return module.createUnreachable();\r\n      }\r\n      compiler.currentType = typeArguments[0];\r\n      return module.createLoad(\r\n        typeArguments[0].byteSize,\r\n        typeArguments[0].is(TypeFlags.SIGNED | TypeFlags.INTEGER),\r\n        arg0,\r\n        typeArguments[0].is(TypeFlags.INTEGER) &&\r\n        contextualType.is(TypeFlags.INTEGER) &&\r\n        contextualType.size > typeArguments[0].size\r\n          ? (compiler.currentType = contextualType).toNativeType()\r\n          : (compiler.currentType = typeArguments[0]).toNativeType(),\r\n        offset\r\n      );\r\n    }\r\n    case \"store\": { // store<T!>(offset: usize, value: *, constantOffset?: usize) -> void\r\n      compiler.currentType = Type.void;\r\n      if (operands.length < 2 || operands.length > 3) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        if (operands.length < 2) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n            reportNode.range, \"2\", operands.length.toString(10)\r\n          );\r\n        } else {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_arguments_but_got_1,\r\n            reportNode.range, \"3\", operands.length.toString(10)\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg1 = compiler.compileExpression(\r\n        operands[1],\r\n        typeArguments[0],\r\n        typeArguments[0].is(TypeFlags.INTEGER)\r\n          ? ConversionKind.NONE // no need to convert to small int (but now might result in a float)\r\n          : ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      let type: Type;\r\n      if (\r\n        typeArguments[0].is(TypeFlags.INTEGER) &&\r\n        (\r\n          !compiler.currentType.is(TypeFlags.INTEGER) ||    // float to int\r\n          compiler.currentType.size < typeArguments[0].size // int to larger int (clear garbage bits)\r\n        )\r\n      ) {\r\n        arg1 = compiler.convertExpression(\r\n          arg1,\r\n          compiler.currentType, typeArguments[0],\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.NONE, // still clears garbage bits\r\n          operands[1]\r\n        );\r\n        type = typeArguments[0];\r\n      } else {\r\n        type = compiler.currentType;\r\n      }\r\n      let offset = operands.length == 3 ? evaluateConstantOffset(compiler, operands[2]) : 0; // reports\r\n      if (offset < 0) { // reported in evaluateConstantOffset\r\n        return module.createUnreachable();\r\n      }\r\n      compiler.currentType = Type.void;\r\n      return module.createStore(typeArguments[0].byteSize, arg0, arg1, type.toNativeType(), offset);\r\n    }\r\n    case \"sizeof\": { // sizeof<T!>() -> usize\r\n      compiler.currentType = compiler.options.usizeType;\r\n      if (operands.length != 0) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n      }\r\n      let byteSize = (<Type[]>typeArguments)[0].byteSize;\r\n      if (compiler.options.isWasm64) {\r\n        // implicitly wrap if contextual type is a 32-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size <= 32) {\r\n          compiler.currentType = Type.u32;\r\n          ret = module.createI32(byteSize);\r\n        } else {\r\n          ret = module.createI64(byteSize, 0);\r\n        }\r\n      } else {\r\n        // implicitly extend if contextual type is a 64-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size == 64) {\r\n          compiler.currentType = Type.u64;\r\n          ret = module.createI64(byteSize, 0);\r\n        } else {\r\n          ret = module.createI32(byteSize);\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"alignof\": { // alignof<T!>() -> usize\r\n      compiler.currentType = compiler.options.usizeType;\r\n      if (operands.length != 0) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let byteSize = (<Type[]>typeArguments)[0].byteSize;\r\n      let alignLog2: i32;\r\n      switch (byteSize) {\r\n        case 1: { alignLog2 = 0; break; }\r\n        case 2: { alignLog2 = 1; break; }\r\n        case 4: { alignLog2 = 2; break; }\r\n        case 8: { alignLog2 = 3; break; }\r\n        default: { assert(false); return module.createUnreachable(); }\r\n      }\r\n      if (compiler.options.isWasm64) {\r\n        // implicitly wrap if contextual type is a 32-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size <= 32) {\r\n          compiler.currentType = Type.u32;\r\n          ret = module.createI32(alignLog2);\r\n        } else {\r\n          ret = module.createI64(alignLog2, 0);\r\n        }\r\n      } else {\r\n        // implicitly extend if contextual type is a 64-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size == 64) {\r\n          compiler.currentType = Type.u64;\r\n          ret = module.createI64(alignLog2, 0);\r\n        } else {\r\n          ret = module.createI32(alignLog2);\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"offsetof\": { // offsetof<T!>(fieldName?: string) -> usize\r\n      compiler.currentType = compiler.options.usizeType;\r\n      if (operands.length > 1) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let classType = typeArguments[0].classReference;\r\n      if (!classType) {\r\n        compiler.error( // TODO: better error\r\n          DiagnosticCode.Operation_not_supported,\r\n          reportNode.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let offset: i32;\r\n      if (operands.length) {\r\n        if (\r\n          operands[0].kind != NodeKind.LITERAL ||\r\n          (<LiteralExpression>operands[0]).literalKind != LiteralKind.STRING\r\n        ) {\r\n          compiler.error(\r\n            DiagnosticCode.String_literal_expected,\r\n            operands[0].range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        let fieldName = (<StringLiteralExpression>operands[0]).value;\r\n        let field = classType.members ? classType.members.get(fieldName) : null;\r\n        if (!(field && field.kind == ElementKind.FIELD)) {\r\n          compiler.error(\r\n            DiagnosticCode.Type_0_has_no_property_1,\r\n            operands[0].range, classType.internalName, fieldName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        offset = (<Field>field).memoryOffset;\r\n      } else {\r\n        offset = classType.currentMemoryOffset;\r\n      }\r\n      if (compiler.options.isWasm64) {\r\n        // implicitly wrap if contextual type is a 32-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size <= 32) {\r\n          compiler.currentType = Type.u32;\r\n          return module.createI32(offset);\r\n        } else {\r\n          return module.createI64(offset);\r\n        }\r\n      } else {\r\n        // implicitly extend if contextual type is a 64-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size == 64) {\r\n          compiler.currentType = Type.u64;\r\n          return module.createI64(offset);\r\n        } else {\r\n          return module.createI32(offset);\r\n        }\r\n      }\r\n    }\r\n\r\n    // control flow\r\n\r\n    case \"select\": { // select<T?>(ifTrue: T, ifFalse: T, condition: bool) -> T\r\n      if (operands.length != 3) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"3\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpressionRetainType(operands[0], Type.i32, WrapMode.NONE);\r\n      }\r\n      let type = compiler.currentType;\r\n      arg1 = compiler.compileExpression(operands[1], type, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      arg2 = compiler.makeIsTrueish(\r\n        compiler.compileExpressionRetainType(operands[2], Type.bool, WrapMode.NONE),\r\n        compiler.currentType\r\n      );\r\n      compiler.currentType = type;\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.BOOL: {\r\n          ret = module.createSelect(arg0, arg1, arg2);\r\n          break;\r\n        }\r\n        default: { // any other value type\r\n          ret = module.createSelect(arg0, arg1, arg2);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"unreachable\": { // unreachable() -> *\r\n      if (operands.length != 0) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n      }\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      return module.createUnreachable();\r\n    }\r\n\r\n    // host operations\r\n\r\n    case \"memory.size\": { // memory.size() -> i32\r\n      compiler.currentType = Type.i32;\r\n      if (operands.length != 0) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n      }\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      return module.createHost(HostOp.CurrentMemory);\r\n    }\r\n    case \"memory.grow\": { // memory.grow(pages: i32) -> i32\r\n      compiler.currentType = Type.i32;\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n        arg0 = module.createUnreachable();\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      }\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      return module.createHost(HostOp.GrowMemory, null, [ arg0 ]);\r\n    }\r\n    // see: https://github.com/WebAssembly/bulk-memory-operations\r\n    case \"memory.copy\": { // memory.copy(dest: usize, src: usize: n: usize) -> void\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 3) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"3\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.void;\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg1 = compiler.compileExpression(\r\n        operands[1],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg2 = compiler.compileExpression(\r\n        operands[2],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      compiler.currentType = Type.void;\r\n      throw new Error(\"not implemented\");\r\n      // return module.createHost(HostOp.MoveMemory, null, [ arg0, arg1, arg2 ]);\r\n    }\r\n    case \"memory.fill\": { // memory.fill(dest: usize, value: u8, n: usize) -> void\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 3) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"3\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.void;\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg1 = compiler.compileExpression(\r\n        operands[1],\r\n        Type.u32,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg2 = compiler.compileExpression(\r\n        operands[2],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      compiler.currentType = Type.void;\r\n      throw new Error(\"not implemented\");\r\n      // return module.createHost(HostOp.SetMemory, null, [ arg0, arg1, arg2 ]);\r\n    }\r\n\r\n    // other\r\n\r\n    case \"changetype\": { // changetype<T!>(value: *) -> T\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        if (typeArguments && typeArguments.length) compiler.currentType = typeArguments[0];\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = typeArguments[0];\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpressionRetainType(\r\n        operands[0],\r\n        typeArguments[0],\r\n        WrapMode.NONE\r\n      );\r\n      compiler.currentType = typeArguments[0];\r\n      if (compiler.currentType.size != typeArguments[0].size) {\r\n        compiler.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          reportNode.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      // if (reportNode.range.source.sourceKind != SourceKind.STDLIB)\r\n      //  compiler.warning(DiagnosticCode.Operation_is_unsafe, reportNode.range);\r\n      return arg0; // any usize to any usize\r\n    }\r\n    case \"assert\": { // assert<T?>(isTrueish: T, message?: string) -> T with T != null\r\n      if (operands.length < 1 || operands.length > 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0].nonNullableType;\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        if (operands.length < 1) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n            reportNode.range, \"1\", operands.length.toString(10)\r\n          );\r\n        } else if (operands.length > 2) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_arguments_but_got_1,\r\n            reportNode.range, \"2\", operands.length.toString(10)\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length) compiler.currentType = typeArguments[0].nonNullableType;\r\n        if (typeArguments.length != 1) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpressionRetainType(operands[0], Type.bool, WrapMode.WRAP);\r\n      }\r\n\r\n      let type = compiler.currentType;\r\n      compiler.currentType = type.nonNullableType;\r\n\r\n      // just return ifTrueish if assertions are disabled, or simplify if dropped anyway\r\n      if (compiler.options.noAssert) {\r\n        if (contextualType == Type.void) {\r\n          compiler.currentType = Type.void;\r\n          return module.createNop();\r\n        }\r\n        return arg0;\r\n      }\r\n\r\n      let abort = compileAbort(compiler, operands.length == 2 ? operands[1] : null, reportNode);\r\n\r\n      compiler.currentType = type.nonNullableType;\r\n\r\n      if (contextualType == Type.void) { // simplify if dropped anyway\r\n        switch (compiler.currentType.kind) {\r\n          default: { // any integer up to 32-bits incl. bool\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI32,\r\n                arg0\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI64,\r\n                arg0\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE:\r\n          case TypeKind.USIZE: {\r\n            ret = module.createIf(\r\n              module.createUnary(\r\n                compiler.options.isWasm64\r\n                  ? UnaryOp.EqzI64\r\n                  : UnaryOp.EqzI32,\r\n                arg0\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          // TODO: also check for NaN in float assertions, as in `Boolean(NaN) -> false`?\r\n          case TypeKind.F32: {\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF32,\r\n                arg0,\r\n                module.createF32(0)\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF64,\r\n                arg0,\r\n                module.createF64(0)\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.VOID: {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = abort;\r\n            break;\r\n          }\r\n        }\r\n        compiler.currentType = Type.void;\r\n      } else {\r\n        switch (compiler.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            let flow = compiler.currentFunction.flow;\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(\r\n              compiler.currentType,\r\n              !flow.canOverflow(arg0, compiler.currentType)\r\n            );\r\n            ret = module.createIf(\r\n              module.createTeeLocal(tempLocal.index, arg0),\r\n              module.createGetLocal(tempLocal.index, NativeType.I32),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I32:\r\n          case TypeKind.U32:\r\n          default: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i32, false);\r\n            ret = module.createIf(\r\n              module.createTeeLocal(tempLocal.index, arg0),\r\n              module.createGetLocal(tempLocal.index, NativeType.I32),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI64,\r\n                module.createTeeLocal(tempLocal.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal.index, NativeType.I64)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE:\r\n          case TypeKind.USIZE: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n            ret = module.createIf(\r\n              module.createUnary(\r\n                compiler.options.isWasm64\r\n                  ? UnaryOp.EqzI64\r\n                  : UnaryOp.EqzI32,\r\n                module.createTeeLocal(tempLocal.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal.index, compiler.options.nativeSizeType)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.f32, false);\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF32,\r\n                module.createTeeLocal(tempLocal.index, arg0),\r\n                module.createF32(0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal.index, NativeType.F32)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.f64, false);\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF64,\r\n                module.createTeeLocal(tempLocal.index, arg0),\r\n                module.createF64(0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal.index, NativeType.F64)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.VOID: {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = abort;\r\n            break;\r\n          }\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"unchecked\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let flow = compiler.currentFunction.flow;\r\n      flow.set(FlowFlags.UNCHECKED_CONTEXT);\r\n      ret = compiler.compileExpressionRetainType(operands[0], contextualType, WrapMode.NONE);\r\n      flow.unset(FlowFlags.UNCHECKED_CONTEXT);\r\n      return ret;\r\n    }\r\n    case \"call_indirect\": { // call_indirect<T?>(target: Function | u32, ...args: *[]) -> T\r\n      if (operands.length < 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let returnType: Type;\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        returnType = typeArguments[0];\r\n      } else {\r\n        returnType = contextualType;\r\n      }\r\n      arg0 = compiler.compileExpressionRetainType(operands[0], Type.u32, WrapMode.NONE);\r\n      if (compiler.currentType.kind != TypeKind.U32) {\r\n        compiler.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          operands[0].range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let numOperands = operands.length - 1;\r\n      let operandExprs = new Array<ExpressionRef>(numOperands);\r\n      let signatureParts = new Array<string>(numOperands + 1);\r\n      let nativeReturnType = returnType.toNativeType();\r\n      let nativeParamTypes = new Array<NativeType>(numOperands);\r\n      for (let i = 0; i < numOperands; ++i) {\r\n        operandExprs[i] = compiler.compileExpressionRetainType(operands[1 + i], Type.i32, WrapMode.NONE);\r\n        let operandType = compiler.currentType;\r\n        signatureParts[i] = operandType.toSignatureString();\r\n        nativeParamTypes[i] = operandType.toNativeType();\r\n      }\r\n      signatureParts[numOperands] = returnType.toSignatureString();\r\n      let typeName = signatureParts.join(\"\");\r\n      let typeRef = module.getFunctionTypeBySignature(nativeReturnType, nativeParamTypes);\r\n      if (!typeRef) typeRef = module.addFunctionType(typeName, nativeReturnType, nativeParamTypes);\r\n      compiler.currentType = returnType;\r\n      // of course this can easily result in a 'RuntimeError: function signature mismatch' trap and\r\n      // thus must be used with care. it exists because it *might* be useful in specific scenarios.\r\n      return module.createCallIndirect(arg0, operandExprs, typeName);\r\n    }\r\n\r\n    // user-defined diagnostic macros\r\n\r\n    case \"ERROR\": {\r\n      compiler.error(\r\n        DiagnosticCode.User_defined_0,\r\n        reportNode.range, (operands.length ? operands[0] : reportNode).range.toString()\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    case \"WARNING\": {\r\n      compiler.warning(\r\n        DiagnosticCode.User_defined_0,\r\n        reportNode.range, (operands.length ? operands[0] : reportNode).range.toString()\r\n      );\r\n      return module.createNop();\r\n    }\r\n    case \"INFO\": {\r\n      compiler.info(\r\n        DiagnosticCode.User_defined_0,\r\n        reportNode.range, (operands.length ? operands[0] : reportNode).range.toString()\r\n      );\r\n      return module.createNop();\r\n    }\r\n\r\n    // conversions\r\n\r\n    case \"i8\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.i8;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.i8,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"i16\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.i16;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.i16,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"i32\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.i32;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.i32,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"i64\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.i64;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.i64,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"isize\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = compiler.options.isWasm64\r\n          ? Type.isize64\r\n          : Type.isize32;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.isWasm64\r\n          ? Type.isize64\r\n          : Type.isize32,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"u8\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.u8;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.u8,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"u16\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.u16;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.u16,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"u32\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.u32;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.u32,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"u64\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.u64;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.u64,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"usize\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = compiler.options.usizeType;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"bool\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.bool;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.bool,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"f32\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.f32;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.f32,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"f64\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.f64;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.f64,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n\r\n    // gc\r\n\r\n    case \"iterateRoots\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.void;\r\n        return module.createUnreachable();\r\n      }\r\n      let expr = compiler.compileExpressionRetainType(operands[0], Type.u32, WrapMode.NONE);\r\n      let type = compiler.currentType;\r\n      let signatureReference = type.signatureReference;\r\n      compiler.currentType = Type.void;\r\n      if (\r\n        !type.is(TypeFlags.REFERENCE) ||\r\n        !signatureReference ||\r\n        signatureReference.parameterTypes.length != 1 ||\r\n        signatureReference.parameterTypes[0] != compiler.options.usizeType\r\n       ) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n          reportNode.range, type.toString(), \"(ref: usize) => void\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      compiler.currentType = Type.void;\r\n      // just emit a call even if the function doesn't yet exist\r\n      compiler.needsIterateRoots = true;\r\n      return module.createCall(\"~iterateRoots\", [ expr ], NativeType.None);\r\n    }\r\n  }\r\n  var expr = deferASMCall(compiler, prototype, operands, contextualType, reportNode);\r\n  if (expr) {\r\n    if (typeArguments && typeArguments.length) {\r\n      compiler.error(\r\n        DiagnosticCode.Type_0_is_not_generic,\r\n        reportNode.range, prototype.internalName\r\n      );\r\n    }\r\n    return expr;\r\n  }\r\n  compiler.error(\r\n    DiagnosticCode.Operation_not_supported,\r\n    reportNode.range\r\n  );\r\n  return module.createUnreachable();\r\n}\r\n\r\n/** Defers an inline-assembler-like call to a built-in function. */\r\nfunction deferASMCall(\r\n  compiler: Compiler,\r\n  prototype: FunctionPrototype,\r\n  operands: Expression[],\r\n  contextualType: Type,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  switch (prototype.internalName) {\r\n\r\n    // TODO: Operators can't be just deferred (don't have a corresponding generic built-in)\r\n    //   add, sub, mul, div_s, div_u, rem_s, rem_u\r\n    //   and, or, xor, shl, shr_u, shr_s\r\n    //   eq, eqz, ne, lt_s, lt_u, le_s, le_u, gt_s, gt_u, ge_s, ge_u\r\n\r\n    case \"i32.clz\": return deferASM(\"clz\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.clz\": return deferASM(\"clz\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"i32.ctz\": return deferASM(\"ctz\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.ctz\": return deferASM(\"ctz\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"i32.popcnt\": return deferASM(\"popcnt\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.popcnt\": return deferASM(\"popcnt\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"i32.rotl\": return deferASM(\"rotl\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.rotl\": return deferASM(\"rotl\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"i32.rotr\": return deferASM(\"rotr\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.rotr\": return deferASM(\"rotr\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"f32.abs\": return deferASM(\"abs\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.abs\": return deferASM(\"abs\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.max\": return deferASM(\"max\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.max\": return deferASM(\"max\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.min\": return deferASM(\"min\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.min\": return deferASM(\"min\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.ceil\": return deferASM(\"ceil\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.ceil\": return deferASM(\"ceil\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.floor\": return deferASM(\"floor\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.floor\": return deferASM(\"floor\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.copysign\": return deferASM(\"copysign\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.copysign\": return deferASM(\"copysign\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.nearest\": return deferASM(\"nearest\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.nearest\": return deferASM(\"nearest\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"i32.reinterpret_f32\": return deferASM(\"reinterpret\", compiler, Type.i32, operands, Type.f32, reportNode);\r\n    case \"i64.reinterpret_f64\": return deferASM(\"reinterpret\", compiler, Type.i64, operands, Type.f64, reportNode);\r\n    case \"f32.reinterpret_i32\": return deferASM(\"reinterpret\", compiler, Type.f32, operands, Type.i32, reportNode);\r\n    case \"f64.reinterpret_i64\": return deferASM(\"reinterpret\", compiler, Type.f64, operands, Type.i64, reportNode);\r\n\r\n    case \"f32.sqrt\": return deferASM(\"sqrt\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.sqrt\": return deferASM(\"sqrt\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.trunc\": return deferASM(\"trunc\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.trunc\": return deferASM(\"trunc\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"i32.load8_s\": return deferASM(\"load\", compiler, Type.i8, operands, Type.i32, reportNode);\r\n    case \"i32.load8_u\": return deferASM(\"load\", compiler, Type.u8, operands, Type.u32, reportNode);\r\n    case \"i32.load16_s\": return deferASM(\"load\", compiler, Type.i16, operands, Type.i32, reportNode);\r\n    case \"i32.load16_u\": return deferASM(\"load\", compiler, Type.u16, operands, Type.u32, reportNode);\r\n    case \"i32.load\": return deferASM(\"load\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.load8_s\": return deferASM(\"load\", compiler, Type.i8, operands, Type.i64, reportNode);\r\n    case \"i64.load8_u\": return deferASM(\"load\", compiler, Type.u8, operands, Type.u64, reportNode);\r\n    case \"i64.load16_s\": return deferASM(\"load\", compiler, Type.i16, operands, Type.i64, reportNode);\r\n    case \"i64.load16_u\": return deferASM(\"load\", compiler, Type.u16, operands, Type.u64, reportNode);\r\n    case \"i64.load32_s\": return deferASM(\"load\", compiler, Type.i32, operands, Type.i64, reportNode);\r\n    case \"i64.load32_u\": return deferASM(\"load\", compiler, Type.u32, operands, Type.u64, reportNode);\r\n    case \"i64.load\": return deferASM(\"load\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n    case \"f32.load\": return deferASM(\"load\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.load\": return deferASM(\"load\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"i32.store8\": return deferASM(\"store\", compiler, Type.i8, operands, Type.i32, reportNode);\r\n    case \"i32.store16\": return deferASM(\"store\", compiler, Type.i16, operands, Type.i32, reportNode);\r\n    case \"i32.store\": return deferASM(\"store\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.store8\": return deferASM(\"store\", compiler, Type.i8, operands, Type.i64, reportNode);\r\n    case \"i64.store16\": return deferASM(\"store\", compiler, Type.i16, operands, Type.i64, reportNode);\r\n    case \"i64.store32\": return deferASM(\"store\", compiler, Type.i32, operands, Type.i64, reportNode);\r\n    case \"i64.store\": return deferASM(\"store\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n    case \"f32.store\": return deferASM(\"store\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.store\": return deferASM(\"store\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n  }\r\n  return 0;\r\n}\r\n\r\n/** A helper for deferring inline-assembler-like calls to built-in functions. */\r\nfunction deferASM(\r\n  name: string,\r\n  compiler: Compiler,\r\n  typeArgument: Type,\r\n  operands: Expression[],\r\n  valueType: Type,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var prototype = assert(compiler.program.elementsLookup.get(name));\r\n  assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n  return compileCall(compiler, <FunctionPrototype>prototype, [ typeArgument ], operands, valueType, reportNode);\r\n}\r\n\r\n/** Evaluates the constant type of a type argument *or* expression. */\r\nfunction evaluateConstantType(\r\n  compiler: Compiler,\r\n  typeArguments: Type[] | null,\r\n  operands: Expression[],\r\n  reportNode: Node\r\n): Type | null {\r\n  if (operands.length == 0) { // requires type argument\r\n    if (!typeArguments || typeArguments.length != 1) {\r\n      compiler.error(\r\n        DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n        reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n      );\r\n      return null;\r\n    }\r\n    return typeArguments[0];\r\n  }\r\n  if (operands.length == 1) { // optional type argument\r\n    if (typeArguments) {\r\n      if (typeArguments.length == 1) {\r\n        compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        if (typeArguments.length) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return null;\r\n        }\r\n        compiler.compileExpressionRetainType(operands[0], Type.i32, WrapMode.NONE);\r\n      }\r\n    } else {\r\n      compiler.compileExpressionRetainType(operands[0], Type.i32, WrapMode.NONE);\r\n    }\r\n    return compiler.currentType;\r\n  }\r\n  if (typeArguments && typeArguments.length > 1) {\r\n    compiler.error(\r\n      DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n      reportNode.range, \"1\", typeArguments.length.toString(10)\r\n    );\r\n  }\r\n  compiler.error(\r\n    DiagnosticCode.Expected_0_arguments_but_got_1,\r\n    reportNode.range, \"1\", operands.length.toString(10)\r\n  );\r\n  return null;\r\n}\r\n\r\n/** Evaluates a `constantOffset` argument.*/\r\nfunction evaluateConstantOffset(compiler: Compiler, expression: Expression): i32 {\r\n  var expr: ExpressionRef;\r\n  var value: i32;\r\n  if (compiler.options.isWasm64) {\r\n    expr = compiler.precomputeExpression(expression, Type.usize64, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n    if (\r\n      getExpressionId(expr) != ExpressionId.Const ||\r\n      getExpressionType(expr) != NativeType.I64 ||\r\n      getConstValueI64High(expr) != 0 ||\r\n      (value = getConstValueI64Low(expr)) < 0\r\n    ) {\r\n      compiler.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        expression.range\r\n      );\r\n      value = -1;\r\n    }\r\n  } else {\r\n    expr = compiler.precomputeExpression(expression, Type.usize32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n    if (\r\n      getExpressionId(expr) != ExpressionId.Const ||\r\n      getExpressionType(expr) != NativeType.I32 ||\r\n      (value = getConstValueI32(expr)) < 0\r\n    ) {\r\n      compiler.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        expression.range\r\n      );\r\n      value = -1;\r\n    }\r\n  }\r\n  return value;\r\n}\r\n\r\n/** Compiles a memory allocation for an instance of the specified class. */\r\nexport function compileAllocate(\r\n  compiler: Compiler,\r\n  classInstance: Class,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var program = compiler.program;\r\n  assert(classInstance.program == program);\r\n  var module = compiler.module;\r\n  var options = compiler.options;\r\n\r\n  // __gc_allocate(size, markFn)\r\n  if (program.hasGC && classInstance.type.isManaged(program)) {\r\n    let allocateInstance = assert(program.gcAllocateInstance);\r\n    if (!compiler.compileFunction(allocateInstance)) return module.createUnreachable();\r\n    compiler.currentType = classInstance.type;\r\n    return module.createCall(\r\n      allocateInstance.internalName, [\r\n        options.isWasm64\r\n          ? module.createI64(classInstance.currentMemoryOffset)\r\n          : module.createI32(classInstance.currentMemoryOffset),\r\n        module.createI32(\r\n          ensureGCHook(compiler, classInstance)\r\n        )\r\n      ],\r\n      options.nativeSizeType\r\n    );\r\n\r\n  // memory.allocate(size)\r\n  } else {\r\n    let allocateInstance = program.memoryAllocateInstance;\r\n    if (!allocateInstance) {\r\n      program.error(\r\n        DiagnosticCode.Cannot_find_name_0,\r\n        reportNode.range, \"memory.allocate\"\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    if (!compiler.compileFunction(allocateInstance)) return module.createUnreachable();\r\n\r\n    compiler.currentType = classInstance.type;\r\n    return module.createCall(\r\n      allocateInstance.internalName, [\r\n        options.isWasm64\r\n          ? module.createI64(classInstance.currentMemoryOffset)\r\n          : module.createI32(classInstance.currentMemoryOffset)\r\n      ],\r\n      options.nativeSizeType\r\n    );\r\n  }\r\n}\r\n\r\n/** Compiles an abort wired to the conditionally imported 'abort' function. */\r\nexport function compileAbort(\r\n  compiler: Compiler,\r\n  message: Expression | null,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var program = compiler.program;\r\n  var module = compiler.module;\r\n\r\n  var stringType = program.typesLookup.get(\"string\");\r\n  if (!stringType) return module.createUnreachable();\r\n\r\n  var abortInstance = program.abortInstance;\r\n  if (!(abortInstance && compiler.compileFunction(abortInstance))) return module.createUnreachable();\r\n\r\n  var messageArg = message != null\r\n    ? compiler.compileExpression(message, stringType, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n    : stringType.toNativeZero(module);\r\n\r\n  var filenameArg = compiler.ensureStaticString(reportNode.range.source.normalizedPath);\r\n\r\n  compiler.currentType = Type.void;\r\n  return module.createBlock(null, [\r\n    module.createCallImport(\r\n      abortInstance.internalName, [\r\n        messageArg,\r\n        filenameArg,\r\n        module.createI32(reportNode.range.line),\r\n        module.createI32(reportNode.range.column)\r\n      ],\r\n      NativeType.None\r\n    ),\r\n    module.createUnreachable()\r\n  ]);\r\n}\r\n\r\n/** Compiles the iterateRoots function if requires. */\r\nexport function compileIterateRoots(compiler: Compiler): void {\r\n  var module = compiler.module;\r\n  var exprs = new Array<ExpressionRef>();\r\n\r\n  for (let element of compiler.program.elementsLookup.values()) {\r\n    if (element.kind != ElementKind.GLOBAL) continue;\r\n    let global = <Global>element;\r\n    let classReference = global.type.classReference;\r\n    if (\r\n      global.is(CommonFlags.COMPILED) &&\r\n      classReference !== null &&\r\n      !classReference.hasDecorator(DecoratorFlags.UNMANAGED)\r\n    ) {\r\n      if (global.is(CommonFlags.INLINED)) {\r\n        let value = global.constantIntegerValue;\r\n        exprs.push(\r\n          module.createCallIndirect(\r\n            module.createGetLocal(0, NativeType.I32),\r\n            [\r\n              compiler.options.isWasm64\r\n                ? module.createI64(i64_low(value), i64_high(value))\r\n                : module.createI32(i64_low(value))\r\n            ],\r\n            \"iv\"\r\n          )\r\n        );\r\n      } else {\r\n        exprs.push(\r\n          module.createCallIndirect(\r\n            module.createGetLocal(0, NativeType.I32),\r\n            [\r\n              module.createGetGlobal(\r\n                global.internalName,\r\n                compiler.options.nativeSizeType\r\n              )\r\n            ],\r\n            \"iv\"\r\n          )\r\n        );\r\n      }\r\n    }\r\n  }\r\n  var typeRef = compiler.ensureFunctionType([ Type.i32 ], Type.void);\r\n  module.addFunction(\"~iterateRoots\", typeRef, [],\r\n    exprs.length\r\n      ? module.createBlock(null, exprs)\r\n      : module.createNop()\r\n  );\r\n}\r\n\r\n/** Ensures that the specified class's GC hook exists and returns its function table index. */\r\nexport function ensureGCHook(\r\n  compiler: Compiler,\r\n  classInstance: Class\r\n): u32 {\r\n  var program = compiler.program;\r\n  assert(classInstance.type.isManaged(program));\r\n\r\n  // check if the GC hook has already been created\r\n  {\r\n    let existingIndex = classInstance.gcHookIndex;\r\n    if (existingIndex != <u32>-1) return existingIndex;\r\n  }\r\n\r\n  // check if the class implements a custom GC function (only valid for internals)\r\n  var members = classInstance.members;\r\n  if (classInstance.prototype.declaration.range.source.isLibrary) {\r\n    if (members !== null && members.has(\"__gc\")) {\r\n      let gcPrototype = assert(members.get(\"__gc\"));\r\n      assert(gcPrototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let gcInstance = assert(program.resolver.resolveFunction(<FunctionPrototype>gcPrototype, null));\r\n      assert(gcInstance.is(CommonFlags.PRIVATE | CommonFlags.INSTANCE));\r\n      assert(!gcInstance.isAny(CommonFlags.AMBIENT | CommonFlags.VIRTUAL));\r\n      assert(gcInstance.signature.parameterTypes.length == 0);\r\n      assert(gcInstance.signature.returnType == Type.void);\r\n      gcInstance.internalName = classInstance.internalName + \"~gc\";\r\n      assert(compiler.compileFunction(gcInstance));\r\n      let index = compiler.ensureFunctionTableEntry(gcInstance);\r\n      classInstance.gcHookIndex = index;\r\n      return index;\r\n    }\r\n  }\r\n\r\n  var module = compiler.module;\r\n  var options = compiler.options;\r\n  var nativeSizeType = options.nativeSizeType;\r\n  var nativeSizeSize = options.usizeType.byteSize;\r\n  var body = new Array<ExpressionRef>();\r\n\r\n  // nothing to mark if 'this' is null\r\n  body.push(\r\n    module.createIf(\r\n      module.createUnary(\r\n        options.isWasm64\r\n          ? UnaryOp.EqzI64\r\n          : UnaryOp.EqzI32,\r\n        module.createGetLocal(0, nativeSizeType)\r\n      ),\r\n      module.createReturn()\r\n    )\r\n  );\r\n\r\n  // remember the function index so we don't recurse infinitely\r\n  var functionTable = compiler.functionTable;\r\n  var gcHookIndex = functionTable.length;\r\n  functionTable.push(0);\r\n  classInstance.gcHookIndex = gcHookIndex;\r\n\r\n  // if the class extends a base class, call its hook first (calls mark)\r\n  var baseInstance = classInstance.base;\r\n  if (baseInstance) {\r\n    assert(baseInstance.type.isManaged(program));\r\n    body.push(\r\n      module.createCallIndirect(\r\n        module.createI32(\r\n          ensureGCHook(compiler, <Class>baseInstance.type.classReference)\r\n        ),\r\n        [\r\n          module.createGetLocal(0, nativeSizeType)\r\n        ],\r\n        nativeSizeType == NativeType.I64 ? \"Iv\" : \"iv\"\r\n      )\r\n    );\r\n\r\n  // if this class is the top-most base class, mark the instance\r\n  } else {\r\n    body.push(\r\n      module.createCall(assert(program.gcMarkInstance).internalName, [\r\n        module.createGetLocal(0, nativeSizeType)\r\n      ], NativeType.None)\r\n    );\r\n  }\r\n\r\n  // mark instances assigned to own fields that are again references\r\n  if (members) {\r\n    for (let member of members.values()) {\r\n      if (member.kind == ElementKind.FIELD) {\r\n        if ((<Field>member).parent === classInstance) {\r\n          let type = (<Field>member).type;\r\n          if (type.isManaged(program)) {\r\n            let offset = (<Field>member).memoryOffset;\r\n            assert(offset >= 0);\r\n            body.push(\r\n              module.createCall(assert(program.gcMarkInstance).internalName, [\r\n                module.createLoad(\r\n                  nativeSizeSize,\r\n                  false,\r\n                  module.createGetLocal(0, nativeSizeType),\r\n                  nativeSizeType,\r\n                  offset\r\n                )\r\n              ], NativeType.None)\r\n            );\r\n          }\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  // add the function to the module and return its table index\r\n  functionTable[gcHookIndex] = module.addFunction(\r\n    classInstance.internalName + \"~gc\",\r\n    compiler.ensureFunctionType(null, Type.void, options.usizeType),\r\n    null,\r\n    module.createBlock(null, body)\r\n  );\r\n  return gcHookIndex;\r\n}\r\n","/** @module util *//***/\r\n\r\n/** An enum of named character codes. */\r\nexport const enum CharCode {\r\n\r\n  NULL = 0,\r\n  LINEFEED = 0x0A,\r\n  CARRIAGERETURN = 0x0D,\r\n  LINESEPARATOR = 0x2028,\r\n  PARAGRAPHSEPARATOR = 0x2029,\r\n  NEXTLINE = 0x0085,\r\n\r\n  SPACE = 0x20,\r\n  NONBREAKINGSPACE = 0xA0,\r\n  ENQUAD = 0x2000,\r\n  EMQUAD = 0x2001,\r\n  ENSPACE = 0x2002,\r\n  EMSPACE = 0x2003,\r\n  THREEPEREMSPACE = 0x2004,\r\n  FOURPEREMSPACE = 0x2005,\r\n  SIXPEREMSPACE = 0x2006,\r\n  FIGURESPACE = 0x2007,\r\n  PUNCTUATIONSPACE = 0x2008,\r\n  THINSPACE = 0x2009,\r\n  HAIRSPACE = 0x200A,\r\n  ZEROWIDTHSPACE = 0x200B,\r\n  NARROWNOBREAKSPACE = 0x202F,\r\n  IDEOGRAPHICSPACE = 0x3000,\r\n  MATHEMATICALSPACE = 0x205F,\r\n  OGHAM = 0x1680,\r\n\r\n  _ = 0x5F,\r\n\r\n  _0 = 0x30,\r\n  _1 = 0x31,\r\n  _2 = 0x32,\r\n  _3 = 0x33,\r\n  _4 = 0x34,\r\n  _5 = 0x35,\r\n  _6 = 0x36,\r\n  _7 = 0x37,\r\n  _8 = 0x38,\r\n  _9 = 0x39,\r\n\r\n  a = 0x61,\r\n  b = 0x62,\r\n  c = 0x63,\r\n  d = 0x64,\r\n  e = 0x65,\r\n  f = 0x66,\r\n  g = 0x67,\r\n  h = 0x68,\r\n  i = 0x69,\r\n  j = 0x6A,\r\n  k = 0x6B,\r\n  l = 0x6C,\r\n  m = 0x6D,\r\n  n = 0x6E,\r\n  o = 0x6F,\r\n  p = 0x70,\r\n  q = 0x71,\r\n  r = 0x72,\r\n  s = 0x73,\r\n  t = 0x74,\r\n  u = 0x75,\r\n  v = 0x76,\r\n  w = 0x77,\r\n  x = 0x78,\r\n  y = 0x79,\r\n  z = 0x7A,\r\n\r\n  A = 0x41,\r\n  B = 0x42,\r\n  C = 0x43,\r\n  D = 0x44,\r\n  E = 0x45,\r\n  F = 0x46,\r\n  G = 0x47,\r\n  H = 0x48,\r\n  I = 0x49,\r\n  J = 0x4A,\r\n  K = 0x4B,\r\n  L = 0x4C,\r\n  M = 0x4D,\r\n  N = 0x4E,\r\n  O = 0x4F,\r\n  P = 0x50,\r\n  Q = 0x51,\r\n  R = 0x52,\r\n  S = 0x53,\r\n  T = 0x54,\r\n  U = 0x55,\r\n  V = 0x56,\r\n  W = 0x57,\r\n  X = 0x58,\r\n  Y = 0x59,\r\n  Z = 0x5a,\r\n\r\n  AMPERSAND = 0x26,\r\n  ASTERISK = 0x2A,\r\n  AT = 0x40,\r\n  BACKSLASH = 0x5C,\r\n  BACKTICK = 0x60,\r\n  BAR = 0x7C,\r\n  CARET = 0x5E,\r\n  CLOSEBRACE = 0x7D,\r\n  CLOSEBRACKET = 0x5D,\r\n  CLOSEPAREN = 0x29,\r\n  COLON = 0x3A,\r\n  COMMA = 0x2C,\r\n  DOLLAR = 0x24,\r\n  DOT = 0x2E,\r\n  DOUBLEQUOTE = 0x22,\r\n  EQUALS = 0x3D,\r\n  EXCLAMATION = 0x21,\r\n  GREATERTHAN = 0x3E,\r\n  HASH = 0x23,\r\n  LESSTHAN = 0x3C,\r\n  MINUS = 0x2D,\r\n  OPENBRACE = 0x7B,\r\n  OPENBRACKET = 0x5B,\r\n  OPENPAREN = 0x28,\r\n  PERCENT = 0x25,\r\n  PLUS = 0x2B,\r\n  QUESTION = 0x3F,\r\n  SEMICOLON = 0x3B,\r\n  SINGLEQUOTE = 0x27,\r\n  SLASH = 0x2F,\r\n  TILDE = 0x7E,\r\n\r\n  BACKSPACE = 0x08,\r\n  FORMFEED = 0x0C,\r\n  BYTEORDERMARK = 0xFEFF,\r\n  TAB = 0x09,\r\n  VERTICALTAB = 0x0B\r\n}\r\n\r\n/** Tests if the specified character code is some sort of line break. */\r\nexport function isLineBreak(c: CharCode): bool {\r\n  switch (c) {\r\n    case CharCode.LINEFEED:\r\n    case CharCode.CARRIAGERETURN:\r\n    case CharCode.LINESEPARATOR:\r\n    case CharCode.PARAGRAPHSEPARATOR: {\r\n      return true;\r\n    }\r\n    default: {\r\n      return false;\r\n    }\r\n  }\r\n}\r\n\r\n/** Tests if the specified character code is some sort of white space. */\r\nexport function isWhiteSpace(c: i32): bool {\r\n  switch (c) {\r\n    case CharCode.SPACE:\r\n    case CharCode.TAB:\r\n    case CharCode.VERTICALTAB:\r\n    case CharCode.FORMFEED:\r\n    case CharCode.NONBREAKINGSPACE:\r\n    case CharCode.NEXTLINE:\r\n    case CharCode.OGHAM:\r\n    case CharCode.NARROWNOBREAKSPACE:\r\n    case CharCode.MATHEMATICALSPACE:\r\n    case CharCode.IDEOGRAPHICSPACE:\r\n    case CharCode.BYTEORDERMARK: {\r\n      return true;\r\n    }\r\n    default: {\r\n      return c >= CharCode.ENQUAD && c <= CharCode.ZEROWIDTHSPACE;\r\n    }\r\n  }\r\n}\r\n\r\n/** Tests if the specified character code is a valid decimal digit. */\r\nexport function isDecimalDigit(c: i32): bool {\r\n  return c >= CharCode._0 && c <= CharCode._9;\r\n}\r\n\r\n/** Tests if the specified character code is a valid octal digit. */\r\nexport function isOctalDigit(c: i32): bool {\r\n  return c >= CharCode._0 && c <= CharCode._7;\r\n}\r\n\r\n/** Tests if the specified character code is a valid start of an identifier. */\r\nexport function isIdentifierStart(c: i32): bool {\r\n  return c >= CharCode.A && c <= CharCode.Z\r\n      || c >= CharCode.a && c <= CharCode.z\r\n      || c == CharCode.DOLLAR\r\n      || c == CharCode._\r\n      || c > 0x7f && isUnicodeIdentifierStart(c);\r\n}\r\n\r\n/** Tests if the specified character code is a valid keyword character. */\r\nexport function isKeywordCharacter(c: i32): bool {\r\n  return c >= CharCode.a && c <= CharCode.z;\r\n}\r\n\r\n/** Tests if the specified character code is a valid part of an identifier. */\r\nexport function isIdentifierPart(c: i32): bool {\r\n  return c >= CharCode.A && c <= CharCode.Z\r\n      || c >= CharCode.a && c <= CharCode.z\r\n      || c >= CharCode._0 && c <= CharCode._9\r\n      || c == CharCode.DOLLAR\r\n      || c == CharCode._\r\n      || c > 0x7f && isUnicodeIdentifierPart(c);\r\n}\r\n\r\n// storing as u16 to save memory\r\nconst unicodeIdentifierStart: u16[] = [\r\n  170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736,\r\n  740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906,\r\n  908, 908, 910, 929, 931,\r\n  1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514,\r\n  1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774,\r\n  1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969,\r\n  1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088,\r\n  2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384,\r\n  2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474,\r\n  2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529,\r\n  2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613,\r\n  2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705,\r\n  2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784,\r\n  2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873,\r\n  2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958,\r\n  2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986,\r\n  2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125,\r\n  3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240,\r\n  3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333,\r\n  3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455,\r\n  3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634,\r\n  3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725,\r\n  3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757,\r\n  3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840,\r\n  3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186,\r\n  4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293,\r\n  4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696,\r\n  4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798,\r\n  4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992,\r\n  5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872,\r\n  5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016,\r\n  6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389,\r\n  6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688,\r\n  6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141,\r\n  7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424,\r\n  7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025,\r\n  8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130,\r\n  8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188,\r\n  8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469,\r\n  8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505,\r\n  8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584,\r\n  11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520,\r\n  11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670,\r\n  11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720,\r\n  11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329,\r\n  12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540,\r\n  12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893,\r\n  19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538,\r\n  42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888,\r\n  42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015,\r\n  43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259,\r\n  43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520,\r\n  43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695,\r\n  43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739,\r\n  43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798,\r\n  43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243,\r\n  55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285,\r\n  64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323,\r\n  64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019,\r\n  65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474,\r\n  65479, 65482, 65487, 65490, 65495, 65498, 65500,\r\n];\r\nconst unicodeIdentifierPart: u16[] = [\r\n  170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736,\r\n  740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906,\r\n  908, 908, 910, 929, 931,\r\n  1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415,\r\n  1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520,\r\n  1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788,\r\n  1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112,\r\n  2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423,\r\n  2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482,\r\n  2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525,\r\n  2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602,\r\n  2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632,\r\n  2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693,\r\n  2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757,\r\n  2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821,\r\n  2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884,\r\n  2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929,\r\n  2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972,\r\n  2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018,\r\n  3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088,\r\n  3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157,\r\n  3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216,\r\n  3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285,\r\n  3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340,\r\n  3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424,\r\n  3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515,\r\n  3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570,\r\n  3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720,\r\n  3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751,\r\n  3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789,\r\n  3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895,\r\n  3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028,\r\n  4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304,\r\n  4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744,\r\n  4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808,\r\n  4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108,\r\n  5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902,\r\n  5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099,\r\n  6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272,\r\n  6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516,\r\n  6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783,\r\n  6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155,\r\n  7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676,\r\n  7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027,\r\n  8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134,\r\n  8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205,\r\n  8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417,\r\n  8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477,\r\n  8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517,\r\n  8521, 8526, 8526, 8544, 8584,\r\n  11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559,\r\n  11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686,\r\n  11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728,\r\n  11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335,\r\n  12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449,\r\n  12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799,\r\n  13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512,\r\n  42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783,\r\n  42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072,\r\n  43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309,\r\n  43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584,\r\n  43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741,\r\n  43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808,\r\n  43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203,\r\n  55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275,\r\n  64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321,\r\n  64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008,\r\n  65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140,\r\n  65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382,\r\n  65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,\r\n];\r\n\r\nfunction lookupInUnicodeMap(code: u16, map: u16[]): bool {\r\n  if (code < map[0]) return false;\r\n\r\n  var lo = 0;\r\n  var hi = map.length;\r\n  var mid: i32;\r\n\r\n  while (lo + 1 < hi) {\r\n    mid = lo + (hi - lo) / 2;\r\n    mid -= mid % 2;\r\n    if (map[mid] <= code && code <= map[mid + 1]) {\r\n      return true;\r\n    }\r\n    if (code < map[mid]) {\r\n      hi = mid;\r\n    } else {\r\n      lo = mid + 2;\r\n    }\r\n  }\r\n  return false;\r\n}\r\n\r\nfunction isUnicodeIdentifierStart(code: i32): bool {\r\n  return code < 0 || code > 0xffff ? false\r\n       : lookupInUnicodeMap(code as u16, unicodeIdentifierStart);\r\n}\r\n\r\nfunction isUnicodeIdentifierPart(code: i32): bool {\r\n  return code < 0 || code > 0xffff ? false\r\n       : lookupInUnicodeMap(code as u16, unicodeIdentifierPart);\r\n}\r\n","/** @module util *//***/\r\n\r\nimport {\r\n  CharCode\r\n} from \"./charcode\";\r\n\r\nconst separator = CharCode.SLASH;\r\n\r\n/**\r\n * Normalizes the specified path, removing interior placeholders.\r\n * Expects a posix-compatible relative path (not Windows compatible).\r\n */\r\nexport function normalizePath(path: string): string {\r\n  var pos = 0;\r\n  var len = path.length;\r\n\r\n  // trim leading './'\r\n  while (pos + 1 < len &&\r\n    path.charCodeAt(pos) == CharCode.DOT &&\r\n    path.charCodeAt(pos + 1) == separator\r\n  ) {\r\n    pos += 2;\r\n  }\r\n\r\n  if (pos > 0 || len < path.length) {\r\n    path = path.substring(pos, len);\r\n    len -= pos;\r\n    pos = 0;\r\n  }\r\n\r\n  var atEnd: bool;\r\n  while (pos + 1 < len) {\r\n    atEnd = false;\r\n\r\n    // we are only interested in '/.' sequences ...\r\n    if (\r\n      path.charCodeAt(pos) == separator &&\r\n      path.charCodeAt(pos + 1) == CharCode.DOT\r\n    ) {\r\n      // '/.' ( '/' | $ )\r\n      atEnd = pos + 2 == len;\r\n      if (atEnd ||\r\n        pos + 2 < len &&\r\n        path.charCodeAt(pos + 2) == separator\r\n      ) {\r\n        path = atEnd\r\n          ? path.substring(0, pos)\r\n          : path.substring(0, pos) + path.substring(pos + 2);\r\n        len -= 2;\r\n        continue;\r\n      }\r\n\r\n      // '/.' ( './' | '.' $ )\r\n      atEnd = pos + 3 == len;\r\n      if (atEnd && path.charCodeAt(pos + 2) == CharCode.DOT ||\r\n        pos + 3 < len &&\r\n        path.charCodeAt(pos + 2) == CharCode.DOT &&\r\n        path.charCodeAt(pos + 3) == separator\r\n      ) {\r\n        // find preceeding '/'\r\n        let ipos = pos;\r\n        while (--ipos >= 0) {\r\n          if (path.charCodeAt(ipos) == separator) {\r\n            if (pos - ipos != 3 ||\r\n              path.charCodeAt(ipos + 1) != CharCode.DOT ||\r\n              path.charCodeAt(ipos + 2) != CharCode.DOT\r\n            ) { // exclude '..' itself\r\n              path = atEnd\r\n                ? path.substring(0, ipos)\r\n                : path.substring(0, ipos) + path.substring(pos + 3);\r\n              len -= pos + 3 - ipos;\r\n              pos = ipos - 1; // incremented again at end of loop\r\n            }\r\n            break;\r\n          }\r\n        }\r\n\r\n        // if there's no preceeding '/', trim start if non-empty\r\n        if (ipos < 0 && pos > 0) {\r\n          if (pos != 2 ||\r\n            path.charCodeAt(0) != CharCode.DOT ||\r\n            path.charCodeAt(1) != CharCode.DOT\r\n          ) { // exclude '..' itself\r\n            path = path.substring(pos + 4);\r\n            len = path.length;\r\n            continue;\r\n          }\r\n        }\r\n      }\r\n    }\r\n    pos++;\r\n  }\r\n  return len > 0 ? path : \".\";\r\n}\r\n\r\n/** Resolves the specified path relative to the specified origin. */\r\nexport function resolvePath(normalizedPath: string, origin: string): string {\r\n  if (normalizedPath.startsWith(\"std/\")) {\r\n    return normalizedPath;\r\n  }\r\n  return normalizePath(\r\n    dirname(origin) + String.fromCharCode(separator) + normalizedPath\r\n  );\r\n}\r\n\r\n/** Obtains the directory portion of a normalized path. */\r\nexport function dirname(normalizedPath: string): string {\r\n  var pos = normalizedPath.length;\r\n  while (--pos > 0) {\r\n    if (normalizedPath.charCodeAt(pos) == separator) {\r\n      return normalizedPath.substring(0, pos);\r\n    }\r\n  }\r\n  return \".\";\r\n}\r\n","/** @module util *//***/\r\n\r\nconst indentX1 = \"  \";\r\nconst indentX2 = \"    \";\r\nconst indentX4 = \"        \";\r\n\r\n/** Creates an indentation matching the number of specified levels. */\r\nexport function indent(sb: string[], level: i32): void {\r\n  while (level >= 4) {\r\n    sb.push(indentX4);\r\n    level -= 4;\r\n  }\r\n  if (level >= 2) {\r\n    sb.push(indentX2);\r\n    level -= 2;\r\n  }\r\n  if (level) {\r\n    sb.push(indentX1);\r\n  }\r\n}\r\n","/** @module util *//***/\r\n\r\n/** Reads an 8-bit integer from the specified buffer. */\r\nexport function readI8(buffer: Uint8Array, offset: i32): i32 {\r\n  return buffer[offset];\r\n}\r\n\r\n/** Writes an 8-bit integer to the specified buffer. */\r\nexport function writeI8(value: i32, buffer: Uint8Array, offset: i32): void {\r\n  buffer[offset] = value;\r\n}\r\n\r\n/** Reads a 16-bit integer from the specified buffer. */\r\nexport function readI16(buffer: Uint8Array, offset: i32): i32 {\r\n  return buffer[offset    ]\r\n       | buffer[offset + 1] << 8;\r\n}\r\n\r\n/** Writes a 16-bit integer to the specified buffer. */\r\nexport function writeI16(value: i32, buffer: Uint8Array, offset: i32): void {\r\n  buffer[offset    ] = value;\r\n  buffer[offset + 1] = value >>> 8;\r\n}\r\n\r\n/** Reads a 32-bit integer from the specified buffer. */\r\nexport function readI32(buffer: Uint8Array, offset: i32): i32 {\r\n  return buffer[offset    ]\r\n       | buffer[offset + 1] << 8\r\n       | buffer[offset + 2] << 16\r\n       | buffer[offset + 3] << 24;\r\n}\r\n\r\n/** Writes a 32-bit integer to the specified buffer. */\r\nexport function writeI32(value: i32, buffer: Uint8Array, offset: i32): void {\r\n  buffer[offset    ] = value;\r\n  buffer[offset + 1] = value >>> 8;\r\n  buffer[offset + 2] = value >>> 16;\r\n  buffer[offset + 3] = value >>> 24;\r\n}\r\n\r\n/** Reads a 64-bit integer from the specified buffer. */\r\nexport function readI64(buffer: Uint8Array, offset: i32): I64 {\r\n  var lo = readI32(buffer, offset);\r\n  var hi = readI32(buffer, offset + 4);\r\n  return i64_new(lo, hi);\r\n}\r\n\r\n/** Writes a 64-bit integer to the specified buffer. */\r\nexport function writeI64(value: I64, buffer: Uint8Array, offset: i32): void {\r\n  writeI32(i64_low(value), buffer, offset);\r\n  writeI32(i64_high(value), buffer, offset + 4);\r\n}\r\n\r\n/** Reads a 32-bit float from the specified buffer. */\r\nexport function readF32(buffer: Uint8Array, offset: i32): f32 {\r\n  return i32_as_f32(readI32(buffer, offset));\r\n}\r\n\r\n/** Writes a 32-bit float to the specified buffer. */\r\nexport function writeF32(value: f32, buffer: Uint8Array, offset: i32): void {\r\n  writeI32(f32_as_i32(value), buffer, offset);\r\n}\r\n\r\n/** Reads a 64-bit float from the specified buffer. */\r\nexport function readF64(buffer: Uint8Array, offset: i32): f64 {\r\n  return i64_as_f64(readI64(buffer, offset));\r\n}\r\n\r\n/** Writes a 64-bit float to the specified buffer. */\r\nexport function writeF64(value: f64, buffer: Uint8Array, offset: i32): void {\r\n  var valueI64 = f64_as_i64(value);\r\n  writeI32(i64_low(valueI64), buffer, offset);\r\n  writeI32(i64_high(valueI64), buffer, offset + 4);\r\n}\r\n","/**\r\n * Low-level C-like compiler API.\r\n * @module index\r\n *//***/\r\n\r\nimport {\r\n  Compiler,\r\n  Options,\r\n  Target,\r\n  Feature\r\n} from \"./compiler\";\r\n\r\nimport {\r\n  Decompiler\r\n} from \"./decompiler\";\r\n\r\nimport {\r\n  IDLBuilder,\r\n  TSDBuilder\r\n} from \"./definitions\";\r\n\r\nimport {\r\n  DiagnosticMessage,\r\n  DiagnosticCategory,\r\n  formatDiagnosticMessage\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Module\r\n} from \"./module\";\r\n\r\nimport {\r\n  Parser\r\n} from \"./parser\";\r\n\r\nimport {\r\n  Program\r\n} from \"./program\";\r\n\r\n/** Parses a source file. If `parser` has been omitted a new one is created. */\r\nexport function parseFile(text: string, path: string, isEntry: bool = false,\r\n  parser: Parser | null = null\r\n): Parser {\r\n  if (!parser) parser = new Parser();\r\n  parser.parseFile(text, path, isEntry);\r\n  return parser;\r\n}\r\n\r\n/** Obtains the next required file's path. Returns `null` once complete. */\r\nexport function nextFile(parser: Parser): string | null {\r\n  return parser.nextFile();\r\n}\r\n\r\n/** Obtains the next diagnostic message. Returns `null` once complete. */\r\nexport function nextDiagnostic(parser: Parser): DiagnosticMessage | null {\r\n  var program = parser.program;\r\n  return program.diagnosticsOffset < program.diagnostics.length\r\n    ? program.diagnostics[program.diagnosticsOffset++]\r\n    : null;\r\n}\r\n\r\n/** Formats a diagnostic message to a string. */\r\nexport { formatDiagnosticMessage as formatDiagnostic };\r\n\r\n/** Tests whether a diagnostic is informatory. */\r\nexport function isInfo(message: DiagnosticMessage): bool {\r\n  return message.category == DiagnosticCategory.INFO;\r\n}\r\n\r\n/** Tests whether a diagnostic is a warning. */\r\nexport function isWarning(message: DiagnosticMessage): bool {\r\n  return message.category == DiagnosticCategory.WARNING;\r\n}\r\n\r\n/** Tests whether a diagnostic is an error. */\r\nexport function isError(message: DiagnosticMessage): bool {\r\n  return message.category == DiagnosticCategory.ERROR;\r\n}\r\n\r\n/** Creates a new set of compiler options. */\r\nexport function createOptions(): Options {\r\n  return new Options();\r\n}\r\n\r\n/** Sets the `target` option. */\r\nexport function setTarget(options: Options, target: Target): void {\r\n  options.target = target;\r\n}\r\n\r\n/** Sets the `noTreeShaking` option. */\r\nexport function setNoTreeShaking(options: Options, noTreeShaking: bool): void {\r\n  options.noTreeShaking = noTreeShaking;\r\n}\r\n\r\n/** Sets the `noAssert` option. */\r\nexport function setNoAssert(options: Options, noAssert: bool): void {\r\n  options.noAssert = noAssert;\r\n}\r\n\r\n/** Sets the `importMemory` option. */\r\nexport function setImportMemory(options: Options, importMemory: bool): void {\r\n  options.importMemory = importMemory;\r\n}\r\n\r\n/** Sets the `importTable` option. */\r\nexport function setImportTable(options: Options, importTable: bool): void {\r\n  options.importTable = importTable;\r\n}\r\n\r\n/** Sets the `sourceMap` option. */\r\nexport function setSourceMap(options: Options, sourceMap: bool): void {\r\n  options.sourceMap = sourceMap;\r\n}\r\n\r\n/** Sets the `memoryBase` option. */\r\nexport function setMemoryBase(options: Options, memoryBase: u32): void {\r\n  options.memoryBase = memoryBase;\r\n}\r\n\r\n/** Sets a 'globalAliases' value. */\r\nexport function setGlobalAlias(options: Options, name: string, alias: string): void {\r\n  var globalAliases = options.globalAliases;\r\n  if (!globalAliases) options.globalAliases = globalAliases = new Map();\r\n  globalAliases.set(name, alias);\r\n}\r\n\r\n/** Sign extension operations. */\r\nexport const FEATURE_SIGN_EXTENSION = Feature.SIGN_EXTENSION;\r\n/** Mutable global imports and exports. */\r\nexport const FEATURE_MUTABLE_GLOBAL = Feature.MUTABLE_GLOBAL;\r\n\r\n/** Enables a specific feature. */\r\nexport function enableFeature(options: Options, feature: Feature): void {\r\n  options.features |= feature;\r\n}\r\n\r\n/** Gives the compiler a hint at the optimize levels that will be used later on. */\r\nexport function setOptimizeLevelHints(options: Options, optimizeLevel: i32, shrinkLevel: i32): void {\r\n  options.optimizeLevelHint = optimizeLevel;\r\n  options.shrinkLevelHint = shrinkLevel;\r\n}\r\n\r\n/** Finishes parsing. */\r\nexport function finishParsing(parser: Parser): Program {\r\n  return parser.finish();\r\n}\r\n\r\n/** Compiles the sources computed by the parser to a module. */\r\nexport function compileProgram(program: Program, options: Options | null = null): Module {\r\n  return new Compiler(program, options).compile();\r\n}\r\n\r\n/** Decompiles a module to its (low level) source. */\r\nexport function decompileModule(module: Module): string {\r\n  var decompiler = new Decompiler();\r\n  decompiler.decompile(module);\r\n  return decompiler.finish();\r\n}\r\n\r\n/** Builds WebIDL definitions for the specified program. */\r\nexport function buildIDL(program: Program): string {\r\n  return IDLBuilder.build(program);\r\n}\r\n\r\n/** Builds TypeScript definitions for the specified program. */\r\nexport function buildTSD(program: Program): string {\r\n  return TSDBuilder.build(program);\r\n}\r\n\r\n/** Prefix indicating a library file. */\r\nexport { LIBRARY_PREFIX } from \"./common\";\r\n","/**\r\n * A decompiler that generates low-level AssemblyScript from WebAssembly binaries.\r\n * @module decompiler\r\n *//***/\r\n\r\nimport {\r\n  Module,\r\n  NativeType,\r\n  ExpressionId,\r\n  UnaryOp,\r\n  BinaryOp,\r\n  HostOp,\r\n  FunctionRef,\r\n  ExpressionRef,\r\n  Index,\r\n  getFunctionName,\r\n  getFunctionBody,\r\n  getFunctionParamCount,\r\n  getFunctionParamType,\r\n  getFunctionResultType,\r\n  getExpressionId,\r\n  getExpressionType,\r\n  getBlockName,\r\n  getBlockChildCount,\r\n  getBlockChild,\r\n  getIfCondition,\r\n  getIfTrue,\r\n  getIfFalse,\r\n  getLoopName,\r\n  getLoopBody,\r\n  getBreakName,\r\n  getBreakCondition,\r\n  getGetLocalIndex,\r\n  getSetLocalIndex,\r\n  getSetLocalValue,\r\n  getLoadOffset,\r\n  getLoadPtr,\r\n  getStoreOffset,\r\n  getStorePtr,\r\n  getStoreValue,\r\n  getConstValueI32,\r\n  getConstValueI64Low,\r\n  getConstValueI64High,\r\n  getConstValueF32,\r\n  getConstValueF64,\r\n  getUnaryOp,\r\n  getUnaryValue,\r\n  getBinaryOp,\r\n  getBinaryLeft,\r\n  getBinaryRight,\r\n  getSelectThen,\r\n  getSelectElse,\r\n  getSelectCondition,\r\n  getDropValue,\r\n  getReturnValue,\r\n  getHostOp,\r\n  getHostOperand\r\n} from \"./module\";\r\n\r\n// TODO :-)\r\n\r\nexport class Decompiler {\r\n\r\n  static decompile(module: Module): string {\r\n    var decompiler = new Decompiler();\r\n    decompiler.decompile(module);\r\n    return decompiler.finish();\r\n  }\r\n\r\n  text: string[] = [];\r\n  functionId: i32 = 0;\r\n\r\n  constructor() { }\r\n\r\n  /** Decompiles a module to an AST that can then be serialized. */\r\n  decompile(module: Module): void {\r\n    throw new Error(\"not implemented\");\r\n  }\r\n\r\n  decompileFunction(func: FunctionRef): void {\r\n    var name = getFunctionName(func) || \"$\" + this.functionId.toString(10);\r\n    var body = getFunctionBody(func);\r\n    this.push(\"function \");\r\n    this.push(name);\r\n    this.push(\"(\");\r\n     for (let i: Index = 0, k: Index = getFunctionParamCount(func); i < k; ++i) {\r\n      if (i > 0) this.push(\", \");\r\n      this.push(\"$\");\r\n      this.push(i.toString(10));\r\n      this.push(\": \");\r\n      this.push(nativeTypeToType(getFunctionParamType(func, i)));\r\n    }\r\n    this.push(\"): \");\r\n    this.push(nativeTypeToType(getFunctionResultType(func)));\r\n    this.push(\" \");\r\n    if (getExpressionId(body) != ExpressionId.Block) {\r\n      this.push(\"{\\n\");\r\n    }\r\n    this.decompileExpression(body);\r\n    if (getExpressionId(body) != ExpressionId.Block) {\r\n      this.push(\"\\n}\\n\");\r\n    }\r\n    ++this.functionId;\r\n  }\r\n\r\n  decompileExpression(expr: ExpressionRef): void {\r\n    var id = getExpressionId(expr);\r\n    var type = getExpressionType(expr);\r\n\r\n    var nested: ExpressionRef;\r\n    var string: string | null;\r\n    var i: Index, k: Index;\r\n\r\n    switch (id) {\r\n      case ExpressionId.Block: { // TODO: magic\r\n        if ((string = getBlockName(expr)) != null) {\r\n          this.push(string);\r\n          this.push(\": \");\r\n        }\r\n        this.push(\"{\\n\");\r\n        k = getBlockChildCount(expr);\r\n        for (i = 0; i < k; ++i) {\r\n          this.decompileExpression(getBlockChild(expr, i));\r\n        }\r\n        this.push(\"}\\n\");\r\n        return;\r\n      }\r\n      case ExpressionId.If: {\r\n        if (type == NativeType.None) {\r\n          this.push(\"if (\");\r\n          this.decompileExpression(getIfCondition(expr));\r\n          this.push(\") \");\r\n          this.decompileExpression(getIfTrue(expr));\r\n          if (nested = getIfFalse(expr)) {\r\n            this.push(\" else \");\r\n            this.decompileExpression(nested);\r\n          }\r\n        } else {\r\n          this.decompileExpression(getIfCondition(expr));\r\n          this.push(\" ? \");\r\n          this.decompileExpression(getIfTrue(expr));\r\n          this.push(\" : \");\r\n          this.decompileExpression(getIfFalse(expr));\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Loop: {\r\n        if ((string = getLoopName(expr)) != null) {\r\n          this.push(string);\r\n          this.push(\": \");\r\n        }\r\n        this.push(\"do \");\r\n        this.decompileExpression(getLoopBody(expr));\r\n        this.push(\"while (0);\\n\");\r\n      }\r\n      case ExpressionId.Break: {\r\n        if (nested = getBreakCondition(expr)) {\r\n          this.push(\"if (\");\r\n          this.decompileExpression(nested);\r\n          this.push(\") \");\r\n        }\r\n        if ((string = getBreakName(expr)) != null) {\r\n          this.push(\"break \");\r\n          this.push(string);\r\n          this.push(\";\\n\");\r\n        } else {\r\n          this.push(\"break;\\n\");\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Switch:\r\n      case ExpressionId.Call:\r\n      case ExpressionId.CallImport:\r\n      case ExpressionId.CallIndirect: {\r\n        throw new Error(\"not implemented\");\r\n      }\r\n      case ExpressionId.GetLocal: {\r\n        this.push(\"$\");\r\n        this.push(getGetLocalIndex(expr).toString(10));\r\n        return;\r\n      }\r\n      case ExpressionId.SetLocal: {\r\n        this.push(\"$\");\r\n        this.push(getSetLocalIndex(expr).toString(10));\r\n        this.push(\" = \");\r\n        this.decompileExpression(getSetLocalValue(expr));\r\n        return;\r\n      }\r\n      case ExpressionId.GetGlobal:\r\n      case ExpressionId.SetGlobal: {\r\n        throw new Error(\"not implemented\");\r\n      }\r\n      case ExpressionId.Load: {\r\n        this.push(\"load<\");\r\n        this.push(nativeTypeToType(type));\r\n        this.push(\">(\");\r\n        this.push(getLoadOffset(expr).toString(10));\r\n        this.push(\" + \");\r\n        this.decompileExpression(getLoadPtr(expr));\r\n        this.push(\")\");\r\n        return;\r\n      }\r\n      case ExpressionId.Store: {\r\n        this.push(\"store<\");\r\n        this.push(nativeTypeToType(type));\r\n        this.push(\">(\");\r\n        this.push(getStoreOffset(expr).toString(10));\r\n        this.push(\" + \");\r\n        this.decompileExpression(getStorePtr(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(getStoreValue(expr));\r\n        this.push(\")\");\r\n        return;\r\n      }\r\n      case ExpressionId.Const: {\r\n        switch (type) {\r\n          case NativeType.I32: {\r\n            this.push(getConstValueI32(expr).toString(10));\r\n            return;\r\n          }\r\n          case NativeType.I64: {\r\n            this.push(\r\n              i64_to_string(\r\n                i64_new(\r\n                  getConstValueI64Low(expr),\r\n                  getConstValueI64High(expr)\r\n                )\r\n              )\r\n            );\r\n            return;\r\n          }\r\n          case NativeType.F32: {\r\n            this.push(getConstValueF32(expr).toString(10));\r\n            return;\r\n          }\r\n          case NativeType.F64: {\r\n            this.push(getConstValueF64(expr).toString(10));\r\n            return;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ExpressionId.Unary: {\r\n        switch (getUnaryOp(expr)) {\r\n          case UnaryOp.ClzI32: {\r\n            this.push(\"clz<i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.CtzI32: {\r\n            this.push(\"ctz<i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.PopcntI32: {\r\n            this.push(\"popcnt<i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.NegF32:\r\n          case UnaryOp.NegF64: {\r\n            this.push(\"-\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.AbsF32: {\r\n            this.push(\"abs<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.CeilF32: {\r\n            this.push(\"ceil<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.FloorF32: {\r\n            this.push(\"floor<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32: {\r\n            this.push(\"trunc<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.NearestF32: {\r\n            this.push(\"nearest<i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.SqrtF32: {\r\n            this.push(\"sqrt<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.EqzI32:\r\n          case UnaryOp.EqzI64: {\r\n            this.push(\"!\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ClzI64: {\r\n            this.push(\"clz<i64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.CtzI64: {\r\n            this.push(\"ctz<i64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.PopcntI64: {\r\n            this.push(\"popcnt<i64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.AbsF64: {\r\n            this.push(\"abs<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.CeilF64: {\r\n            this.push(\"ceil<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.FloorF64: {\r\n            this.push(\"floor<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64: {\r\n            this.push(\"trunc<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.NearestF64: {\r\n            this.push(\"nearest<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.SqrtF64: {\r\n            this.push(\"sqrt<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ExtendI32: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ExtendU32: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.WrapI64: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToI32: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToI64: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToU32: {\r\n            this.push(\"<i32><u32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToU64: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToI32: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToI64: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToU32: {\r\n            this.push(\"<i32><u32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToU64: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretF32: {\r\n            this.push(\"reinterpret<f32,i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretF64: {\r\n            this.push(\"reinterpret<f64,i64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI32ToF32: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI32ToF64: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU32ToF32: {\r\n            this.push(\"<f32><u32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU32ToF64: {\r\n            this.push(\"<f64><u32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI64ToF32: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI64ToF64: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU64ToF32: {\r\n            this.push(\"<f32><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU64ToF64: {\r\n            this.push(\"<f64><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.PromoteF32: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.DemoteF64: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretI32: {\r\n            this.push(\"reinterpret<i32,f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretI64: {\r\n            this.push(\"reinterpret<i64,f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ExpressionId.Binary: { // TODO: precedence\r\n        switch (getBinaryOp(expr)) {\r\n          case BinaryOp.AddI32:\r\n          case BinaryOp.AddI64:\r\n          case BinaryOp.AddF32:\r\n          case BinaryOp.AddF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" + \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.SubI32:\r\n          case BinaryOp.SubI64:\r\n          case BinaryOp.SubF32:\r\n          case BinaryOp.SubF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" - \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.MulI32:\r\n          case BinaryOp.MulI64:\r\n          case BinaryOp.MulF32:\r\n          case BinaryOp.MulF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" * \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivI32:\r\n          case BinaryOp.DivI64:\r\n          case BinaryOp.DivF32:\r\n          case BinaryOp.DivF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" / \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivU32: {\r\n            this.push(\"<i32>(<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" / <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.RemI32:\r\n          case BinaryOp.RemI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" % \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RemU32: {\r\n            this.push(\"<i32>(<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" / <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.AndI32:\r\n          case BinaryOp.AndI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" & \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.OrI32:\r\n          case BinaryOp.OrI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" | \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.XorI32:\r\n          case BinaryOp.XorI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" ^ \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShlI32:\r\n          case BinaryOp.ShlI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" << \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShrU32:\r\n          case BinaryOp.ShrU64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >>> \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShrI32:\r\n          case BinaryOp.ShrI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >> \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RotlI32: {\r\n            this.push(\"rotl<i32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.RotrI32: {\r\n            this.push(\"rotr<i32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.EqI32:\r\n          case BinaryOp.EqI64:\r\n          case BinaryOp.EqF32:\r\n          case BinaryOp.EqF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" == \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.NeI32:\r\n          case BinaryOp.NeI64:\r\n          case BinaryOp.NeF32:\r\n          case BinaryOp.NeF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" != \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LtI32:\r\n          case BinaryOp.LtI64:\r\n          case BinaryOp.LtF32:\r\n          case BinaryOp.LtF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" < \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LtU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" < <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeI32:\r\n          case BinaryOp.LeI64:\r\n          case BinaryOp.LeF32:\r\n          case BinaryOp.LeF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" <= \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" <= <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtI32:\r\n          case BinaryOp.GtI64:\r\n          case BinaryOp.GtF32:\r\n          case BinaryOp.GtF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" > \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" > <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeI32:\r\n          case BinaryOp.GeI64:\r\n          case BinaryOp.GeF32:\r\n          case BinaryOp.GeF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >= \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >= <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" / <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RemU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" % <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RotlI64: {\r\n            this.push(\"rotl<i64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.RotrI64: {\r\n            this.push(\"rotr<i64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.LtU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" < <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" <= <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" > <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >= <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.CopysignF32: {\r\n            this.push(\"copysign<f32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.MinF32: {\r\n            this.push(\"min<f32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.MaxF32: {\r\n            this.push(\"max<f32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.CopysignF64: {\r\n            this.push(\"copysign<f64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.MinF64: {\r\n            this.push(\"min<f64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.MaxF64: {\r\n            this.push(\"max<f64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Select: {\r\n        this.push(\"select<\");\r\n        this.push(nativeTypeToType(type));\r\n        this.push(\">(\");\r\n        this.decompileExpression(getSelectThen(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(getSelectElse(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(getSelectCondition(expr));\r\n        this.push(\")\");\r\n        return;\r\n      }\r\n      case ExpressionId.Drop: {\r\n        this.decompileExpression(getDropValue(expr));\r\n        this.push(\";\\n\");\r\n        return;\r\n      }\r\n      case ExpressionId.Return: {\r\n        if (nested = getReturnValue(expr)) {\r\n          this.push(\"return \");\r\n          this.decompileExpression(nested);\r\n          this.push(\";\\n\");\r\n        } else {\r\n          this.push(\"return;\\n\");\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Host: {\r\n        switch (getHostOp(expr)) {\r\n          case HostOp.CurrentMemory: {\r\n            this.push(\"memory.size()\");\r\n            return;\r\n          }\r\n          case HostOp.GrowMemory: {\r\n            this.push(\"memory.grow(\");\r\n            this.decompileExpression(getHostOperand(expr, 0));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ExpressionId.Nop: {\r\n        this.push(\";\\n\");\r\n        return;\r\n      }\r\n      case ExpressionId.Unreachable: {\r\n        this.push(\"unreachable()\");\r\n        return;\r\n      }\r\n      case ExpressionId.AtomicCmpxchg:\r\n      case ExpressionId.AtomicRMW:\r\n      case ExpressionId.AtomicWait:\r\n      case ExpressionId.AtomicWake:\r\n    }\r\n    throw new Error(\"not implemented\");\r\n  }\r\n\r\n  private push(text: string): void {\r\n    // mostly here so we can add debugging if necessary\r\n    this.text.push(text);\r\n  }\r\n\r\n  finish(): string {\r\n    var ret = this.text.join(\"\");\r\n    this.text = [];\r\n    return ret;\r\n  }\r\n}\r\n\r\nfunction nativeTypeToType(type: NativeType): string {\r\n  switch (type) {\r\n    case NativeType.None: return \"void\";\r\n    case NativeType.I32: return \"i32\";\r\n    case NativeType.I64: return \"i64\";\r\n    case NativeType.F32: return \"f32\";\r\n    case NativeType.F64: return \"f64\";\r\n    case NativeType.Unreachable: throw new Error(\"unreachable type\");\r\n    case NativeType.Auto: throw new Error(\"auto type\");\r\n    default: throw new Error(\"unexpected type\");\r\n  }\r\n}\r\n","/**\r\n * Definition builders for WebIDL and TypeScript.\r\n * @module definitions\r\n *//***/\r\n\r\nimport {\r\n  CommonFlags\r\n} from \"./common\";\r\n\r\nimport {\r\n  Program,\r\n  Element,\r\n  ElementKind,\r\n  Global,\r\n  Enum,\r\n  EnumValue,\r\n  Field,\r\n  Function,\r\n  FunctionPrototype,\r\n  Class,\r\n  ClassPrototype,\r\n  Namespace,\r\n  ConstantValueKind,\r\n  Interface,\r\n  Property\r\n} from \"./program\";\r\n\r\nimport {\r\n  Type,\r\n  TypeKind\r\n} from \"./types\";\r\n\r\nimport {\r\n  indent\r\n} from \"./util\";\r\n\r\n/** Walker base class. */\r\nabstract class ExportsWalker {\r\n\r\n  /** Program reference. */\r\n  program: Program;\r\n  /** Whether to include private members */\r\n  includePrivate: bool;\r\n  /** Elements still to do. */\r\n  todo: Element[] = [];\r\n  /** Already seen elements. */\r\n  seen: Set<Element> = new Set();\r\n\r\n  /** Constructs a new Element walker. */\r\n  constructor(program: Program, includePrivate: bool = false) {\r\n    this.program = program;\r\n    this.includePrivate;\r\n  }\r\n\r\n  /** Walks all exports and calls the respective handlers. */\r\n  walk(): void {\r\n    for (let moduleExport of this.program.moduleLevelExports.values()) {\r\n      // FIXME: doesn't honor the actual externally visible name\r\n      this.visitElement(moduleExport.element);\r\n    }\r\n    var todo = this.todo;\r\n    for (let i = 0; i < todo.length; ) this.visitElement(todo[i]);\r\n  }\r\n\r\n  /** Visits an element.*/\r\n  visitElement(element: Element): void {\r\n    if (element.is(CommonFlags.PRIVATE) && !this.includePrivate) return;\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\r\n    switch (element.kind) {\r\n      case ElementKind.GLOBAL: {\r\n        if (element.is(CommonFlags.COMPILED)) this.visitGlobal(<Global>element);\r\n        break;\r\n      }\r\n      case ElementKind.ENUM: {\r\n        if (element.is(CommonFlags.COMPILED)) this.visitEnum(<Enum>element);\r\n        break;\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        this.visitFunctionInstances(<FunctionPrototype>element);\r\n        break;\r\n      }\r\n      case ElementKind.CLASS_PROTOTYPE: {\r\n        this.visitClassInstances(<ClassPrototype>element);\r\n        break;\r\n      }\r\n      case ElementKind.FIELD: {\r\n        if ((<Field>element).is(CommonFlags.COMPILED)) this.visitField(<Field>element);\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let prop = <Property>element;\r\n        let getter = prop.getterPrototype;\r\n        if (getter) this.visitFunctionInstances(getter);\r\n        let setter = prop.setterPrototype;\r\n        if (setter) this.visitFunctionInstances(setter);\r\n        break;\r\n      }\r\n      case ElementKind.NAMESPACE: {\r\n        if (hasCompiledMember(element)) this.visitNamespace(element);\r\n        break;\r\n      }\r\n      default: assert(false);\r\n    }\r\n  }\r\n\r\n  private visitFunctionInstances(element: FunctionPrototype): void {\r\n    for (let instance of element.instances.values()) {\r\n      if (instance.is(CommonFlags.COMPILED)) this.visitFunction(<Function>instance);\r\n    }\r\n  }\r\n\r\n  private visitClassInstances(element: ClassPrototype): void {\r\n    for (let instance of element.instances.values()) {\r\n      if (instance.is(CommonFlags.COMPILED)) this.visitClass(<Class>instance);\r\n    }\r\n  }\r\n\r\n  abstract visitGlobal(element: Global): void;\r\n  abstract visitEnum(element: Enum): void;\r\n  abstract visitFunction(element: Function): void;\r\n  abstract visitClass(element: Class): void;\r\n  abstract visitInterface(element: Interface): void;\r\n  abstract visitField(element: Field): void;\r\n  abstract visitNamespace(element: Element): void;\r\n}\r\n\r\n/** A WebIDL definitions builder. */\r\nexport class IDLBuilder extends ExportsWalker {\r\n\r\n  /** Builds WebIDL definitions for the specified program. */\r\n  static build(program: Program): string {\r\n    return new IDLBuilder(program).build();\r\n  }\r\n\r\n  private sb: string[] = [];\r\n  private indentLevel: i32 = 0;\r\n\r\n  /** Constructs a new WebIDL builder. */\r\n  constructor(program: Program, includePrivate: bool = false) {\r\n    super(program, includePrivate);\r\n  }\r\n\r\n  visitGlobal(element: Global): void {\r\n    var sb = this.sb;\r\n    var isConst = element.is(CommonFlags.INLINED);\r\n    indent(sb, this.indentLevel);\r\n    if (isConst) sb.push(\"const \");\r\n    sb.push(this.typeToString(element.type));\r\n    sb.push(\" \");\r\n    sb.push(element.simpleName);\r\n    if (isConst) {\r\n      switch (element.constantValueKind) {\r\n        case ConstantValueKind.INTEGER: {\r\n          sb.push(\" = \");\r\n          sb.push(i64_to_string(element.constantIntegerValue));\r\n          break;\r\n        }\r\n        case ConstantValueKind.FLOAT: {\r\n          sb.push(\" = \");\r\n          sb.push(element.constantFloatValue.toString());\r\n          break;\r\n        }\r\n        default: assert(false);\r\n      }\r\n    }\r\n    sb.push(\";\\n\");\r\n  }\r\n\r\n  visitEnum(element: Enum): void {\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel++);\r\n    sb.push(\"interface \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\" {\\n\");\r\n    var members = element.members;\r\n    if (members) {\r\n      for (let [name, member] of members) {\r\n        if (member.kind == ElementKind.ENUMVALUE) {\r\n          let isConst = (<EnumValue>member).is(CommonFlags.INLINED);\r\n          indent(sb, this.indentLevel);\r\n          if (isConst) sb.push(\"const \");\r\n          else sb.push(\"readonly \");\r\n          sb.push(\"unsigned long \");\r\n          sb.push(name);\r\n          if (isConst) {\r\n            sb.push(\" = \");\r\n            sb.push((<EnumValue>member).constantValue.toString(10));\r\n          }\r\n          sb.push(\";\\n\");\r\n        }\r\n      }\r\n      for (let member of members.values()) {\r\n        if (member.kind != ElementKind.ENUMVALUE) this.visitElement(member);\r\n      }\r\n    }\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  visitFunction(element: Function): void {\r\n    var sb = this.sb;\r\n    var signature = element.signature;\r\n    indent(sb, this.indentLevel);\r\n    sb.push(this.typeToString(signature.returnType));\r\n    sb.push(\" \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\"(\");\r\n    var parameters = signature.parameterTypes;\r\n    var numParameters = parameters.length;\r\n    // var requiredParameters = signature.requiredParameters;\r\n    for (let i = 0; i < numParameters; ++i) {\r\n      if (i) sb.push(\", \");\r\n      // if (i >= requiredParameters) sb.push(\"optional \");\r\n      sb.push(this.typeToString(parameters[i]));\r\n      sb.push(\" \");\r\n      sb.push(signature.getParameterName(i));\r\n    }\r\n    sb.push(\");\\n\");\r\n    var members = element.members;\r\n    if (members && members.size) {\r\n      indent(sb, this.indentLevel);\r\n      sb.push(\"interface \");\r\n      sb.push(element.simpleName);\r\n      sb.push(\" {\\n\");\r\n      for (let member of members.values()) this.visitElement(member);\r\n      indent(sb, --this.indentLevel);\r\n      sb.push(\"}\\n\");\r\n    }\r\n  }\r\n\r\n  visitClass(element: Class): void {\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel++);\r\n    sb.push(\"interface \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\" {\\n\");\r\n    // TODO\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  visitInterface(element: Interface): void {\r\n    this.visitClass(element);\r\n  }\r\n\r\n  visitField(element: Field): void {\r\n    // TODO\r\n  }\r\n\r\n  visitNamespace(element: Namespace): void {\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel++);\r\n    sb.push(\"interface \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\" {\\n\");\r\n    var members = element.members;\r\n    if (members) {\r\n      for (let member of members.values()) this.visitElement(member);\r\n    }\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  typeToString(type: Type): string {\r\n    switch (type.kind) {\r\n      case TypeKind.I8: return \"byte\";\r\n      case TypeKind.I16: return \"short\";\r\n      case TypeKind.I32: return \"long\";\r\n      case TypeKind.I64: return \"long long\";\r\n      case TypeKind.ISIZE: return this.program.options.isWasm64 ? \"long long\" : \"long\";\r\n      case TypeKind.U8: return \"octet\";\r\n      case TypeKind.U16: return \"unsigned short\";\r\n      case TypeKind.U32: return \"unsigned long\";\r\n        // ^ TODO: function types\r\n      case TypeKind.U64: return \"unsigned long long\";\r\n      case TypeKind.USIZE: return this.program.options.isWasm64 ? \"unsigned long long\" : \"unsigned long\";\r\n        // ^ TODO: class types\r\n      case TypeKind.BOOL: return \"boolean\";\r\n      case TypeKind.F32: return \"unrestricted float\";\r\n      case TypeKind.F64: return \"unrestricted double\";\r\n      case TypeKind.VOID: return \"void\";\r\n      default: {\r\n        assert(false);\r\n        return \"\";\r\n      }\r\n    }\r\n  }\r\n\r\n  build(): string {\r\n    var sb = this.sb;\r\n    sb.push(\"interface ASModule {\\n\");\r\n    ++this.indentLevel;\r\n    this.walk();\r\n    --this.indentLevel;\r\n    sb.push(\"}\\n\");\r\n    return sb.join(\"\");\r\n  }\r\n}\r\n\r\n/** A TypeScript definitions builder. */\r\nexport class TSDBuilder extends ExportsWalker {\r\n\r\n  /** Builds TypeScript definitions for the specified program. */\r\n  static build(program: Program): string {\r\n    return new TSDBuilder(program).build();\r\n  }\r\n\r\n  private sb: string[] = [];\r\n  private indentLevel: i32 = 0;\r\n\r\n  /** Constructs a new WebIDL builder. */\r\n  constructor(program: Program, includePrivate: bool = false) {\r\n    super(program, includePrivate);\r\n  }\r\n\r\n  visitGlobal(element: Global): void {\r\n    var sb = this.sb;\r\n    var isConst = element.is(CommonFlags.INLINED);\r\n    indent(sb, this.indentLevel);\r\n    if (element.is(CommonFlags.STATIC)) {\r\n      if (isConst) sb.push(\"static readonly \");\r\n      else sb.push(\"static \");\r\n    } else {\r\n      if (isConst) sb.push(\"const \");\r\n      else sb.push(\"var \");\r\n    }\r\n    sb.push(element.simpleName);\r\n    sb.push(\": \");\r\n    sb.push(this.typeToString(element.type));\r\n    sb.push(\";\\n\");\r\n    this.visitNamespace(element);\r\n  }\r\n\r\n  visitEnum(element: Enum): void {\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel++);\r\n    sb.push(\"enum \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\" {\\n\");\r\n    var members = element.members;\r\n    if (members) {\r\n      let numMembers = members.size;\r\n      for (let [name, member] of members) {\r\n        if (member.kind == ElementKind.ENUMVALUE) {\r\n          indent(sb, this.indentLevel);\r\n          sb.push(name);\r\n          if (member.is(CommonFlags.INLINED)) {\r\n            sb.push(\" = \");\r\n            sb.push((<EnumValue>member).constantValue.toString(10));\r\n          }\r\n          sb.push(\",\\n\");\r\n          --numMembers;\r\n        }\r\n      }\r\n      if (numMembers) this.visitNamespace(element);\r\n    }\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  visitFunction(element: Function): void {\r\n    if (element.isAny(CommonFlags.PRIVATE | CommonFlags.SET)) return;\r\n    var sb = this.sb;\r\n    var signature = element.signature;\r\n    indent(sb, this.indentLevel);\r\n    if (element.is(CommonFlags.PROTECTED)) sb.push(\"protected \");\r\n    if (element.is(CommonFlags.STATIC)) sb.push(\"static \");\r\n    if (element.is(CommonFlags.GET)) {\r\n      sb.push(element.prototype.declaration.name.text); // 'get:funcName' internally\r\n      sb.push(\": \");\r\n      sb.push(this.typeToString(signature.returnType));\r\n      sb.push(\";\\n\");\r\n      return;\r\n    } else {\r\n      if (!element.isAny(CommonFlags.STATIC | CommonFlags.INSTANCE)) sb.push(\"function \");\r\n      sb.push(element.simpleName);\r\n    }\r\n    sb.push(\"(\");\r\n    var parameters = signature.parameterTypes;\r\n    var numParameters = parameters.length;\r\n    // var requiredParameters = signature.requiredParameters;\r\n    for (let i = 0; i < numParameters; ++i) {\r\n      if (i) sb.push(\", \");\r\n      // if (i >= requiredParameters) sb.push(\"optional \");\r\n      sb.push(signature.getParameterName(i));\r\n      sb.push(\": \");\r\n      sb.push(this.typeToString(parameters[i]));\r\n    }\r\n    if (element.isAny(CommonFlags.CONSTRUCTOR | CommonFlags.SET)) {\r\n      sb.push(\")\");\r\n    } else {\r\n      sb.push(\"): \");\r\n      sb.push(this.typeToString(signature.returnType));\r\n    }\r\n    sb.push(\";\\n\");\r\n    this.visitNamespace(element);\r\n  }\r\n\r\n  visitClass(element: Class): void {\r\n    var sb = this.sb;\r\n    var isInterface = element.kind == ElementKind.INTERFACE;\r\n    indent(sb, this.indentLevel++);\r\n    if (isInterface) {\r\n      sb.push(\"interface \");\r\n    } else {\r\n      if (element.is(CommonFlags.ABSTRACT)) sb.push(\"abstract \");\r\n      sb.push(\"class \");\r\n    }\r\n    sb.push(element.simpleName);\r\n    var base = element.base;\r\n    if (base && base.is(CommonFlags.COMPILED | CommonFlags.MODULE_EXPORT)) {\r\n      sb.push(\" extends \");\r\n      sb.push(base.simpleName); // TODO: fqn\r\n    }\r\n    sb.push(\" {\\n\");\r\n    var members = element.prototype.members; // static\r\n    if (members) {\r\n      for (let member of members.values()) {\r\n        this.visitElement(member);\r\n      }\r\n    }\r\n    var ctor = element.constructorInstance;\r\n    if (ctor) this.visitFunction(ctor);\r\n    members = element.members; // instance\r\n    if (members) {\r\n      for (let member of members.values()) this.visitElement(member);\r\n    }\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  visitInterface(element: Interface): void {\r\n    this.visitClass(element);\r\n  }\r\n\r\n  visitField(element: Field): void {\r\n    if (element.is(CommonFlags.PRIVATE)) return;\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel);\r\n    if (element.is(CommonFlags.PROTECTED)) sb.push(\"protected \");\r\n    if (element.is(CommonFlags.STATIC)) sb.push(\"static \");\r\n    if (element.is(CommonFlags.READONLY)) sb.push(\"readonly \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\": \");\r\n    sb.push(this.typeToString(element.type));\r\n    sb.push(\";\\n\");\r\n  }\r\n\r\n  visitNamespace(element: Element): void {\r\n    var members = element.members;\r\n    if (members && members.size) {\r\n      let sb = this.sb;\r\n      indent(sb, this.indentLevel++);\r\n      sb.push(\"namespace \");\r\n      sb.push(element.simpleName);\r\n      sb.push(\" {\\n\");\r\n      for (let member of members.values()) this.visitElement(member);\r\n      indent(sb, --this.indentLevel);\r\n      sb.push(\"}\\n\");\r\n    }\r\n  }\r\n\r\n  typeToString(type: Type): string {\r\n    switch (type.kind) {\r\n      case TypeKind.I8: return \"i8\";\r\n      case TypeKind.I16: return \"i16\";\r\n      case TypeKind.I32: return \"i32\";\r\n      case TypeKind.I64: return \"I64\";\r\n      case TypeKind.ISIZE: return this.program.options.isWasm64 ? \"I64\" : \"i32\";\r\n      case TypeKind.U8: return \"u8\";\r\n      case TypeKind.U16: return \"u16\";\r\n      case TypeKind.U32: return \"u32\";\r\n        // ^ TODO: function types\r\n      case TypeKind.U64: return \"U64\";\r\n      case TypeKind.USIZE: return this.program.options.isWasm64 ? \"U64\" : \"u32\";\r\n        // ^ TODO: class types\r\n      case TypeKind.BOOL: return \"bool\";\r\n      case TypeKind.F32: return \"f32\";\r\n      case TypeKind.F64: return \"f64\";\r\n      case TypeKind.VOID: return \"void\";\r\n      default: {\r\n        assert(false);\r\n        return \"\";\r\n      }\r\n    }\r\n  }\r\n\r\n  build(): string {\r\n    var sb = this.sb;\r\n    sb.push(\"declare module ASModule {\\n\");\r\n    sb.push(\"  type i8 = number;\\n\");\r\n    sb.push(\"  type i16 = number;\\n\");\r\n    sb.push(\"  type i32 = number;\\n\");\r\n    sb.push(\"  type u8 = number;\\n\");\r\n    sb.push(\"  type u16 = number;\\n\");\r\n    sb.push(\"  type u32 = number;\\n\");\r\n    sb.push(\"  type f32 = number;\\n\");\r\n    sb.push(\"  type f64 = number;\\n\");\r\n    sb.push(\"  type bool = any;\\n\");\r\n    ++this.indentLevel;\r\n    this.walk();\r\n    --this.indentLevel;\r\n    sb.push(\"}\\n\");\r\n    sb.push(\"export default ASModule;\\n\");\r\n    return this.sb.join(\"\");\r\n  }\r\n}\r\n\r\n// helpers\r\n\r\n/** Tests if a namespace-like element has at least one compiled member. */\r\nfunction hasCompiledMember(element: Element): bool {\r\n  var members = element.members;\r\n  if (members) {\r\n    for (let member of members.values()) {\r\n      switch (member.kind) {\r\n        case ElementKind.FUNCTION_PROTOTYPE: {\r\n          for (let instance of (<FunctionPrototype>member).instances.values()) {\r\n            if (instance.is(CommonFlags.COMPILED)) return true;\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.CLASS_PROTOTYPE: {\r\n          for (let instance of (<ClassPrototype>member).instances.values()) {\r\n            if (instance.is(CommonFlags.COMPILED)) return true;\r\n          }\r\n          break;\r\n        }\r\n        default: {\r\n          if (member.is(CommonFlags.COMPILED) || hasCompiledMember(member)) return true;\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n  return false;\r\n}\r\n","/**\r\n * A TypeScript parser for the AssemblyScript subset.\r\n * @module parser\r\n *//***/\r\n\r\nimport {\r\n  CommonFlags,\r\n  LIBRARY_PREFIX,\r\n  PATH_DELIMITER\r\n} from \"./common\";\r\n\r\nimport {\r\n  Program\r\n} from \"./program\";\r\n\r\nimport {\r\n  Tokenizer,\r\n  Token,\r\n  Range,\r\n  CommentHandler,\r\n  IdentifierHandling\r\n} from \"./tokenizer\";\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  DiagnosticEmitter\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  normalizePath\r\n} from \"./util\";\r\n\r\nimport {\r\n  Node,\r\n  NodeKind,\r\n  Source,\r\n  SourceKind,\r\n  CommonTypeNode,\r\n  TypeNode,\r\n  SignatureNode,\r\n\r\n  Expression,\r\n  AssertionKind,\r\n  CallExpression,\r\n  ClassExpression,\r\n  FunctionExpression,\r\n  IdentifierExpression,\r\n  StringLiteralExpression,\r\n\r\n  Statement,\r\n  BlockStatement,\r\n  BreakStatement,\r\n  ClassDeclaration,\r\n  ContinueStatement,\r\n  DeclarationStatement,\r\n  DecoratorNode,\r\n  DoStatement,\r\n  EnumDeclaration,\r\n  EnumValueDeclaration,\r\n  ExportImportStatement,\r\n  ExportMember,\r\n  ExportStatement,\r\n  ExpressionStatement,\r\n  ForStatement,\r\n  FunctionDeclaration,\r\n  IfStatement,\r\n  ImportDeclaration,\r\n  ImportStatement,\r\n  NamespaceDeclaration,\r\n  ParameterNode,\r\n  ParameterKind,\r\n  ReturnStatement,\r\n  SwitchCase,\r\n  SwitchStatement,\r\n  ThrowStatement,\r\n  TryStatement,\r\n  TypeDeclaration,\r\n  TypeParameterNode,\r\n  VariableStatement,\r\n  VariableDeclaration,\r\n  VoidStatement,\r\n  WhileStatement,\r\n\r\n  mangleInternalPath,\r\n  nodeIsCallable,\r\n  nodeIsGenericCallable\r\n} from \"./ast\";\r\n\r\n/** Parser interface. */\r\nexport class Parser extends DiagnosticEmitter {\r\n\r\n  /** Program being created. */\r\n  program: Program;\r\n  /** Source file names to be requested next. */\r\n  backlog: string[] = new Array();\r\n  /** Source file names already seen, that is processed or backlogged. */\r\n  seenlog: Set<string> = new Set();\r\n  /** Source file names already completely processed. */\r\n  donelog: Set<string> = new Set();\r\n  /** Optional handler to intercept comments while tokenizing. */\r\n  onComment: CommentHandler | null = null;\r\n\r\n  /** Constructs a new parser. */\r\n  constructor() {\r\n    super();\r\n    this.program = new Program(this.diagnostics);\r\n  }\r\n\r\n  /** Parses a file and adds its definitions to the program. */\r\n  parseFile(\r\n    text: string,\r\n    path: string,\r\n    isEntry: bool\r\n  ): void {\r\n    var normalizedPath = normalizePath(path);\r\n    var internalPath = mangleInternalPath(normalizedPath);\r\n\r\n    // check if already processed\r\n    if (this.donelog.has(internalPath)) return;\r\n    this.donelog.add(internalPath); // do not parse again\r\n    this.seenlog.add(internalPath); // do not request again\r\n\r\n    // create the source element\r\n    var source = new Source(\r\n      normalizedPath,\r\n      text,\r\n      isEntry\r\n        ? SourceKind.ENTRY\r\n        : path.startsWith(LIBRARY_PREFIX) && path.indexOf(PATH_DELIMITER, LIBRARY_PREFIX.length) < 0\r\n          ? SourceKind.LIBRARY\r\n          : SourceKind.DEFAULT\r\n    );\r\n    var program = this.program;\r\n    program.sources.push(source);\r\n\r\n    // tokenize and parse\r\n    var tn = new Tokenizer(source, program.diagnostics);\r\n    tn.onComment = this.onComment;\r\n    source.tokenizer = tn;\r\n    var statements = source.statements;\r\n    while (!tn.skip(Token.ENDOFFILE)) {\r\n      let statement = this.parseTopLevelStatement(tn);\r\n      if (statement) {\r\n        statement.parent = source;\r\n        statements.push(statement);\r\n      }\r\n    }\r\n    tn.finish();\r\n  }\r\n\r\n  /** Parses a top-level statement. */\r\n  parseTopLevelStatement(\r\n    tn: Tokenizer,\r\n    namespace: Node | null = null\r\n  ): Statement | null {\r\n    var flags = CommonFlags.NONE;\r\n    var startPos: i32 = -1;\r\n\r\n    // check decorators\r\n    var decorators: DecoratorNode[] | null = null;\r\n    while (tn.skip(Token.AT)) {\r\n      if (startPos < 0) startPos = tn.tokenPos;\r\n      let decorator = this.parseDecorator(tn);\r\n      if (!decorator) {\r\n        this.skipStatement(tn);\r\n        continue;\r\n      }\r\n      if (!decorators) decorators = [];\r\n      decorators.push(decorator);\r\n    }\r\n\r\n    // check modifiers\r\n    var exportStart: i32 = 0;\r\n    var exportEnd: i32 = 0;\r\n    if (tn.skip(Token.EXPORT)) {\r\n      if (tn.skip(Token.DEFAULT)) {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          tn.range()\r\n        );\r\n      }\r\n      if (startPos < 0) startPos = tn.tokenPos;\r\n      flags |= CommonFlags.EXPORT;\r\n      exportStart = tn.tokenPos;\r\n      exportEnd = tn.pos;\r\n    }\r\n\r\n    var declareStart: i32 = 0;\r\n    var declareEnd: i32 = 0;\r\n    var contextIsAmbient = namespace != null && namespace.is(CommonFlags.AMBIENT);\r\n    if (tn.skip(Token.DECLARE)) {\r\n      if (startPos < 0) startPos = tn.tokenPos;\r\n      if (contextIsAmbient) {\r\n        this.error(\r\n          DiagnosticCode.A_declare_modifier_cannot_be_used_in_an_already_ambient_context,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n      flags |= CommonFlags.DECLARE | CommonFlags.AMBIENT;\r\n    } else if (contextIsAmbient) {\r\n      flags |= CommonFlags.AMBIENT;\r\n    }\r\n\r\n    // parse the statement\r\n    var statement: Statement | null = null;\r\n\r\n    // handle declarations\r\n    var first = tn.peek();\r\n    if (startPos < 0) startPos = tn.nextTokenPos;\r\n    switch (first) {\r\n      case Token.CONST: {\r\n        tn.next();\r\n        flags |= CommonFlags.CONST;\r\n        if (tn.skip(Token.ENUM)) {\r\n          statement = this.parseEnum(tn, flags, decorators, startPos);\r\n          break;\r\n        } else {\r\n          statement = this.parseVariable(tn, flags, decorators, startPos);\r\n          decorators = null;\r\n        }\r\n        break;\r\n      }\r\n      case Token.LET: flags |= CommonFlags.LET;\r\n      case Token.VAR: {\r\n        tn.next();\r\n        statement = this.parseVariable(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.ENUM: {\r\n        tn.next();\r\n        statement = this.parseEnum(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.FUNCTION: {\r\n        tn.next();\r\n        statement = this.parseFunction(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.ABSTRACT: {\r\n        let state = tn.mark();\r\n        tn.next();\r\n        if (!tn.skip(Token.CLASS)) {\r\n          tn.reset(state);\r\n          statement = this.parseStatement(tn, true);\r\n          break;\r\n        } else {\r\n          tn.discard(state);\r\n        }\r\n        flags |= CommonFlags.ABSTRACT;\r\n        // fall through\r\n      }\r\n      case Token.CLASS:\r\n      case Token.INTERFACE: {\r\n        tn.next();\r\n        statement = this.parseClassOrInterface(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.NAMESPACE: {\r\n        let state = tn.mark();\r\n        tn.next();\r\n        if (tn.peek(false, IdentifierHandling.PREFER) == Token.IDENTIFIER) {\r\n          tn.discard(state);\r\n          statement = this.parseNamespace(tn, flags, decorators, startPos);\r\n          decorators = null;\r\n        } else {\r\n          tn.reset(state);\r\n          statement = this.parseStatement(tn, true);\r\n        }\r\n        break;\r\n      }\r\n      case Token.IMPORT: {\r\n        tn.next();\r\n        flags |= CommonFlags.IMPORT;\r\n        if (flags & CommonFlags.EXPORT) {\r\n          statement = this.parseExportImport(tn, startPos);\r\n        } else {\r\n          statement = this.parseImport(tn);\r\n        }\r\n        break;\r\n      }\r\n      case Token.TYPE: { // also identifier\r\n        let state = tn.mark();\r\n        tn.next();\r\n        if (tn.peek(false, IdentifierHandling.PREFER) == Token.IDENTIFIER) {\r\n          tn.discard(state);\r\n          statement = this.parseTypeDeclaration(tn, flags, decorators, startPos);\r\n          decorators = null;\r\n        } else {\r\n          tn.reset(state);\r\n          statement = this.parseStatement(tn, true);\r\n        }\r\n        break;\r\n      }\r\n      default: {\r\n\r\n        // handle plain exports\r\n        if (flags & CommonFlags.EXPORT) {\r\n          statement = this.parseExport(tn, flags, startPos);\r\n\r\n        // handle non-declaration statements\r\n        } else {\r\n          if (exportEnd) {\r\n            this.error(\r\n              DiagnosticCode._0_modifier_cannot_be_used_here,\r\n              tn.range(exportStart, exportEnd), \"export\"\r\n            ); // recoverable\r\n          }\r\n          if (declareEnd) {\r\n            this.error(\r\n              DiagnosticCode._0_modifier_cannot_be_used_here,\r\n              tn.range(declareStart, declareEnd), \"declare\"\r\n            ); // recoverable\r\n          }\r\n          if (!namespace) {\r\n            statement = this.parseStatement(tn, true);\r\n          } // TODO: else?\r\n        }\r\n        break;\r\n      }\r\n    }\r\n\r\n    // check for decorators that weren't consumed\r\n    if (decorators) {\r\n      for (let i = 0, k = decorators.length; i < k; ++i) {\r\n        this.error(\r\n          DiagnosticCode.Decorators_are_not_valid_here,\r\n          decorators[i].range\r\n        );\r\n      }\r\n    }\r\n    return statement;\r\n  }\r\n\r\n  /** Obtains the next file to parse. */\r\n  nextFile(): string | null {\r\n    var backlog = this.backlog;\r\n    return backlog.length ? backlog.shift() : null;\r\n  }\r\n\r\n  /** Finishes parsing and returns the program. */\r\n  finish(): Program {\r\n    if (this.backlog.length) throw new Error(\"backlog is not empty\");\r\n    this.backlog = [];\r\n    this.seenlog.clear();\r\n    this.donelog.clear();\r\n    return this.program;\r\n  }\r\n\r\n  /** Parses a type. */\r\n  parseType(\r\n    tn: Tokenizer,\r\n    acceptParenthesized: bool = true,\r\n    suppressErrors: bool = false\r\n  ): CommonTypeNode | null {\r\n\r\n    // NOTE: this parses our limited subset\r\n    var token = tn.next();\r\n    var startPos = tn.tokenPos;\r\n\r\n    var type: CommonTypeNode;\r\n\r\n    // '(' ...\r\n    if (token == Token.OPENPAREN) {\r\n\r\n      // '(' FunctionSignature ')' '|' 'null'?\r\n      let isNullableSignature = tn.skip(Token.OPENPAREN);\r\n      // FunctionSignature?\r\n      let signature = this.tryParseSignature(tn);\r\n      if (signature) {\r\n        if (isNullableSignature) {\r\n          if (!tn.skip(Token.CLOSEPAREN)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \")\"\r\n            );\r\n            return null;\r\n          }\r\n          if (!tn.skip(Token.BAR)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"|\"\r\n            );\r\n            return null;\r\n          }\r\n          if (!tn.skip(Token.NULL)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"null\"\r\n            );\r\n          }\r\n          signature.isNullable = true;\r\n        }\r\n        return signature;\r\n      } else if (isNullableSignature || this.tryParseSignatureIsSignature) {\r\n        this.error(\r\n          DiagnosticCode.Unexpected_token,\r\n          tn.range()\r\n        );\r\n        return null;\r\n      }\r\n\r\n      // Type (',' Type)* ')'\r\n      if (acceptParenthesized) {\r\n        let innerType = this.parseType(tn, false, suppressErrors);\r\n        if (!innerType) return null;\r\n        if (!tn.skip(Token.CLOSEPAREN)) {\r\n          if (!suppressErrors) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(tn.pos), \"}\"\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n        type = innerType;\r\n        type.range.start = startPos;\r\n        type.range.end = tn.pos;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Unexpected_token,\r\n          tn.range()\r\n        );\r\n        return null;\r\n      }\r\n\r\n    // 'void'\r\n    } else if (token == Token.VOID) {\r\n      type = Node.createType(\r\n        Node.createIdentifierExpression(\"void\", tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n\r\n    // 'this'\r\n    } else if (token == Token.THIS) {\r\n      type = Node.createType(\r\n        Node.createThisExpression(tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n\r\n    // 'true'\r\n    } else if (token == Token.TRUE || token == Token.FALSE) {\r\n      type = Node.createType(\r\n        Node.createIdentifierExpression(\"bool\", tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n\r\n    // StringLiteral\r\n    } else if (token == Token.STRINGLITERAL) {\r\n      tn.readString();\r\n      type = Node.createType(\r\n        Node.createIdentifierExpression(\"string\", tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n\r\n    // Identifier\r\n    } else if (token == Token.IDENTIFIER) {\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let parameters = new Array<TypeNode>();\r\n      let nullable = false;\r\n\r\n      // Name<T>\r\n      if (tn.skip(Token.LESSTHAN)) {\r\n        do {\r\n          let parameter = this.parseType(tn, true, suppressErrors);\r\n          if (!parameter) return null;\r\n          parameters.push(<TypeNode>parameter);\r\n        } while (tn.skip(Token.COMMA));\r\n        if (!tn.skip(Token.GREATERTHAN)) {\r\n          if (!suppressErrors) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(tn.pos), \">\"\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n      }\r\n      // ... | null\r\n      if (tn.skip(Token.BAR)) {\r\n        if (tn.skip(Token.NULL)) {\r\n          nullable = true;\r\n        } else {\r\n          if (!suppressErrors) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(tn.pos), \"null\"\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n      }\r\n      type = Node.createType(identifier, parameters, nullable, tn.range(startPos, tn.pos));\r\n\r\n    } else {\r\n      if (!suppressErrors) {\r\n        this.error(\r\n          DiagnosticCode.Identifier_expected,\r\n          tn.range()\r\n        );\r\n      }\r\n      return null;\r\n    }\r\n    // ... [][]\r\n    while (tn.skip(Token.OPENBRACKET)) {\r\n      let bracketStart = tn.tokenPos;\r\n      if (!tn.skip(Token.CLOSEBRACKET)) {\r\n        if (!suppressErrors) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"]\"\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      let bracketRange = tn.range(bracketStart, tn.pos);\r\n\r\n      // ...[] | null\r\n      let nullable = false;\r\n      if (tn.skip(Token.BAR)) {\r\n        if (tn.skip(Token.NULL)) {\r\n          nullable = true;\r\n        } else {\r\n          if (!suppressErrors) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"null\"\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n      }\r\n      type = Node.createType(\r\n        Node.createIdentifierExpression(\"Array\", bracketRange),\r\n        [ type ],\r\n        nullable,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n      if (nullable) break;\r\n    }\r\n\r\n    return type;\r\n  }\r\n\r\n  // Indicates whether tryParseSignature determined that it is handling a Signature\r\n  private tryParseSignatureIsSignature: bool = false;\r\n\r\n  /** Parses a function signature, as used in type declarations. */\r\n  tryParseSignature(\r\n    tn: Tokenizer\r\n  ): SignatureNode | null {\r\n\r\n    // at '(': ('...'? Identifier '?'? ':' Type (','  '...'? Identifier '?'? ':' Type)* )? ')' '=>' Type\r\n\r\n    var state = tn.mark();\r\n    var startPos = tn.tokenPos;\r\n    var parameters: ParameterNode[] | null = null;\r\n    var thisType: TypeNode | null = null;\r\n    var isSignature: bool = false;\r\n\r\n    if (tn.skip(Token.CLOSEPAREN)) {\r\n      isSignature = true;\r\n      tn.discard(state);\r\n      parameters = [];\r\n\r\n    } else {\r\n      isSignature = false; // not yet known\r\n      do {\r\n        let kind = ParameterKind.DEFAULT;\r\n        if (tn.skip(Token.DOT_DOT_DOT)) {\r\n          isSignature = true;\r\n          tn.discard(state);\r\n          kind = ParameterKind.REST;\r\n        }\r\n        if (tn.skip(Token.THIS)) {\r\n          if (tn.skip(Token.COLON)) {\r\n            isSignature = true;\r\n            tn.discard(state);\r\n            let t = this.parseType(tn, false);\r\n            if (!t) return null;\r\n            if (t.kind != NodeKind.TYPE) {\r\n              this.error(\r\n                DiagnosticCode.Operation_not_supported,\r\n                t.range\r\n              );\r\n              this.tryParseSignatureIsSignature = true;\r\n              return null;\r\n            }\r\n            thisType = <TypeNode>t;\r\n          } else {\r\n            tn.reset(state);\r\n            this.tryParseSignatureIsSignature = false;\r\n            return null;\r\n          }\r\n        } else if (tn.skipIdentifier()) {\r\n          let name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range(tn.tokenPos, tn.pos));\r\n          if (tn.skip(Token.QUESTION)) {\r\n            isSignature = true;\r\n            tn.discard(state);\r\n            if (kind == ParameterKind.REST) {\r\n              this.error(\r\n                DiagnosticCode.A_rest_parameter_cannot_be_optional,\r\n                tn.range()\r\n              ); // recoverable\r\n            } else {\r\n              kind = ParameterKind.OPTIONAL;\r\n            }\r\n          }\r\n          if (tn.skip(Token.COLON)) {\r\n            isSignature = true;\r\n            tn.discard(state);\r\n            let type = this.parseType(tn); // not suppressing errors because known\r\n            if (!type) {\r\n              this.tryParseSignatureIsSignature = isSignature;\r\n              return null;\r\n            }\r\n            let param = new ParameterNode();\r\n            param.parameterKind = kind;\r\n            param.name = name;\r\n            param.type = type;\r\n            if (!parameters) parameters = [ param ];\r\n            else parameters.push(param);\r\n          } else {\r\n            if (isSignature) {\r\n              this.error(\r\n                DiagnosticCode.Type_expected,\r\n                tn.range()\r\n              ); // recoverable\r\n            }\r\n          }\r\n        } else {\r\n          if (isSignature) {\r\n            this.error(\r\n              DiagnosticCode.Identifier_expected,\r\n              tn.range()\r\n            );\r\n          } else {\r\n            tn.reset(state);\r\n          }\r\n          this.tryParseSignatureIsSignature = isSignature;\r\n          return null;\r\n        }\r\n      } while (tn.skip(Token.COMMA));\r\n      if (!tn.skip(Token.CLOSEPAREN)) {\r\n        if (isSignature) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n        } else {\r\n          tn.reset(state);\r\n        }\r\n        this.tryParseSignatureIsSignature = isSignature;\r\n        return null;\r\n      }\r\n    }\r\n\r\n    var returnType: CommonTypeNode | null;\r\n    if (tn.skip(Token.EQUALS_GREATERTHAN)) {\r\n      isSignature = true;\r\n      tn.discard(state);\r\n      returnType = this.parseType(tn);\r\n      if (!returnType) {\r\n        this.tryParseSignatureIsSignature = isSignature;\r\n        return null;\r\n      }\r\n    } else {\r\n      if (isSignature) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"=>\"\r\n        );\r\n      } else {\r\n        tn.reset(state);\r\n      }\r\n      this.tryParseSignatureIsSignature = isSignature;\r\n      return null;\r\n    }\r\n    this.tryParseSignatureIsSignature = true;\r\n    return Node.createSignature(\r\n      parameters || [],\r\n      returnType,\r\n      thisType,\r\n      false,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n  }\r\n\r\n  // statements\r\n\r\n  parseDecorator(\r\n    tn: Tokenizer\r\n  ): DecoratorNode | null {\r\n\r\n    // at '@': Identifier ('.' Identifier)* '(' Arguments\r\n\r\n    var startPos = tn.tokenPos;\r\n    if (tn.skipIdentifier()) {\r\n      let name = tn.readIdentifier();\r\n      let expression: Expression = Node.createIdentifierExpression(name, tn.range(startPos, tn.pos));\r\n      while (tn.skip(Token.DOT)) {\r\n        if (tn.skipIdentifier()) {\r\n          name = tn.readIdentifier();\r\n          expression = Node.createPropertyAccessExpression(\r\n            expression,\r\n            Node.createIdentifierExpression(name, tn.range()),\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n      let args: Expression[] | null;\r\n      if (tn.skip(Token.OPENPAREN)) {\r\n        args = this.parseArguments(tn);\r\n        if (args) {\r\n          return Node.createDecorator(expression, args, tn.range(startPos, tn.pos));\r\n        }\r\n      } else {\r\n        return Node.createDecorator(expression, null, tn.range(startPos, tn.pos));\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseVariable(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): VariableStatement | null {\r\n\r\n    // at ('const' | 'let' | 'var'): VariableDeclaration (',' VariableDeclaration)* ';'?\r\n\r\n    var members = new Array<VariableDeclaration>();\r\n    do {\r\n      let member = this.parseVariableDeclaration(tn, flags, decorators);\r\n      if (!member) return null;\r\n      members.push(<VariableDeclaration>member);\r\n    } while (tn.skip(Token.COMMA));\r\n\r\n    var ret = Node.createVariableStatement(members, decorators, flags, tn.range(startPos, tn.pos));\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseVariableDeclaration(\r\n    tn: Tokenizer,\r\n    parentFlags: CommonFlags,\r\n    parentDecorators: DecoratorNode[] | null\r\n  ): VariableDeclaration | null {\r\n\r\n    // before: Identifier (':' Type)? ('=' Expression)?\r\n\r\n    if (!tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n    var identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    var flags = parentFlags;\r\n\r\n    var type: CommonTypeNode | null = null;\r\n    if (tn.skip(Token.COLON)) {\r\n      type = this.parseType(tn);\r\n    }\r\n\r\n    var initializer: Expression | null = null;\r\n    if (tn.skip(Token.EQUALS)) {\r\n      if (flags & CommonFlags.AMBIENT) {\r\n        this.error(\r\n          DiagnosticCode.Initializers_are_not_allowed_in_ambient_contexts,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n      initializer = this.parseExpression(tn, Precedence.COMMA + 1);\r\n      if (!initializer) return null;\r\n    } else {\r\n      if (flags & CommonFlags.CONST) {\r\n        if (!(flags & CommonFlags.AMBIENT)) {\r\n          this.error(\r\n            DiagnosticCode._const_declarations_must_be_initialized,\r\n            identifier.range\r\n          ); // recoverable\r\n        }\r\n      } else if (!type) { // neither type nor initializer\r\n        this.error(\r\n          DiagnosticCode.Type_expected,\r\n          tn.range(tn.pos)\r\n        ); // recoverable\r\n      }\r\n    }\r\n    return Node.createVariableDeclaration(\r\n      identifier,\r\n      type,\r\n      initializer,\r\n      parentDecorators,\r\n      flags,\r\n      Range.join(identifier.range, tn.range())\r\n    );\r\n  }\r\n\r\n  parseEnum(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): EnumDeclaration | null {\r\n\r\n    // at 'enum': Identifier '{' (EnumValueDeclaration (',' EnumValueDeclaration )*)? '}' ';'?\r\n\r\n    if (tn.next() != Token.IDENTIFIER) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n    var identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    if (tn.next() != Token.OPENBRACE) {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"{\"\r\n      );\r\n      return null;\r\n    }\r\n    var members = new Array<EnumValueDeclaration>();\r\n    while (!tn.skip(Token.CLOSEBRACE)) {\r\n      let member = this.parseEnumValue(tn, CommonFlags.NONE);\r\n      if (!member) return null;\r\n      members.push(<EnumValueDeclaration>member);\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.CLOSEBRACE)) {\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"}\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n    var ret = Node.createEnumDeclaration(\r\n      identifier,\r\n      members,\r\n      decorators,\r\n      flags,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseEnumValue(\r\n    tn: Tokenizer,\r\n    parentFlags: CommonFlags\r\n  ): EnumValueDeclaration | null {\r\n\r\n    // before: Identifier ('=' Expression)?\r\n\r\n    if (!tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n    var identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    var value: Expression | null = null;\r\n    if (tn.skip(Token.EQUALS)) {\r\n      value = this.parseExpression(tn, Precedence.COMMA + 1);\r\n      if (!value) return null;\r\n    }\r\n    return Node.createEnumValueDeclaration(\r\n      identifier,\r\n      value,\r\n      parentFlags,\r\n      Range.join(identifier.range, tn.range())\r\n    );\r\n  }\r\n\r\n  parseReturn(\r\n    tn: Tokenizer\r\n  ): ReturnStatement | null {\r\n\r\n    // at 'return': Expression | (';' | '}' | ...'\\n')\r\n\r\n    var expr: Expression | null = null;\r\n    if (\r\n      tn.peek(true) != Token.SEMICOLON &&\r\n      tn.nextToken != Token.CLOSEBRACE &&\r\n      !tn.nextTokenOnNewLine\r\n    ) {\r\n      if (!(expr = this.parseExpression(tn))) return null;\r\n    }\r\n\r\n    var ret = Node.createReturnStatement(expr, tn.range());\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseTypeParameters(\r\n    tn: Tokenizer\r\n  ): TypeParameterNode[] | null {\r\n\r\n    // at '<': TypeParameter (',' TypeParameter)* '>'\r\n\r\n    var typeParameters = new Array<TypeParameterNode>();\r\n    while (!tn.skip(Token.GREATERTHAN)) {\r\n      let typeParameter = this.parseTypeParameter(tn);\r\n      if (!typeParameter) return null;\r\n      typeParameters.push(<TypeParameterNode>typeParameter);\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.GREATERTHAN)) {\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \">\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n    if (typeParameters.length === 0) {\r\n      this.error(\r\n        DiagnosticCode.Type_parameter_list_cannot_be_empty,\r\n        tn.range()\r\n      ); // recoverable\r\n    }\r\n    return typeParameters;\r\n  }\r\n\r\n  parseTypeParameter(\r\n    tn: Tokenizer\r\n  ): TypeParameterNode | null {\r\n\r\n    // before: Identifier ('extends' Type)?\r\n\r\n    if (tn.next() == Token.IDENTIFIER) {\r\n      let identifier = Node.createIdentifierExpression(\r\n        tn.readIdentifier(),\r\n        tn.range()\r\n      );\r\n      let extendsType: TypeNode | null = null;\r\n      if (tn.skip(Token.EXTENDS)) {\r\n        let t = this.parseType(tn);\r\n        if (!t) return null;\r\n        if (t.kind != NodeKind.TYPE) {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            t.range\r\n          );\r\n          return null;\r\n        }\r\n        extendsType = <TypeNode>t;\r\n      }\r\n      return Node.createTypeParameter(\r\n        identifier,\r\n        extendsType,\r\n        Range.join(identifier.range, tn.range())\r\n      );\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  private parseParametersThis: TypeNode | null = null;\r\n\r\n  parseParameters(\r\n    tn: Tokenizer,\r\n    isConstructor: bool = false\r\n  ): ParameterNode[] | null {\r\n\r\n    // at '(': (Parameter (',' Parameter)*)? ')'\r\n\r\n    var parameters = new Array<ParameterNode>();\r\n    var seenRest: ParameterNode | null = null;\r\n    var seenOptional = false;\r\n    var reportedRest = false;\r\n    var thisType: CommonTypeNode | null = null;\r\n\r\n    // check if there is a leading `this` parameter\r\n    this.parseParametersThis = null;\r\n    if (tn.skip(Token.THIS)) {\r\n      if (tn.skip(Token.COLON)) {\r\n        thisType = this.parseType(tn); // reports\r\n        if (!thisType) return null;\r\n        if (thisType.kind == NodeKind.TYPE) {\r\n          this.parseParametersThis = <TypeNode>thisType;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            thisType.range\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \":\"\r\n        );\r\n        return null;\r\n      }\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.CLOSEPAREN)) {\r\n          return parameters;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n\r\n    while (!tn.skip(Token.CLOSEPAREN)) {\r\n      let param = this.parseParameter(tn, isConstructor); // reports\r\n      if (!param) return null;\r\n      if (seenRest && !reportedRest) {\r\n        this.error(\r\n          DiagnosticCode.A_rest_parameter_must_be_last_in_a_parameter_list,\r\n          seenRest.name.range\r\n        );\r\n        reportedRest = true;\r\n      }\r\n      switch (param.parameterKind) {\r\n        default: {\r\n          if (seenOptional) {\r\n            this.error(\r\n              DiagnosticCode.A_required_parameter_cannot_follow_an_optional_parameter,\r\n              param.name.range\r\n            );\r\n          }\r\n          break;\r\n        }\r\n        case ParameterKind.OPTIONAL: {\r\n          seenOptional = true;\r\n          break;\r\n        }\r\n        case ParameterKind.REST: {\r\n          seenRest = param;\r\n          break;\r\n        }\r\n      }\r\n      parameters.push(param);\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.CLOSEPAREN)) {\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n    return parameters;\r\n  }\r\n\r\n  parseParameter(\r\n    tn: Tokenizer,\r\n    isConstructor: bool = false\r\n  ): ParameterNode | null {\r\n\r\n    // before: ('public' | 'private' | 'protected' | '...')? Identifier '?'? (':' Type)? ('=' Expression)?\r\n\r\n    var isRest = false;\r\n    var isOptional = false;\r\n    var startRange: Range | null = null;\r\n    var accessFlags: CommonFlags = CommonFlags.NONE;\r\n    if (isConstructor) {\r\n      if (tn.skip(Token.PUBLIC)) {\r\n        startRange = tn.range();\r\n        accessFlags |= CommonFlags.PUBLIC;\r\n      } else if (tn.skip(Token.PROTECTED)) {\r\n        startRange = tn.range();\r\n        accessFlags |= CommonFlags.PROTECTED;\r\n      } else if (tn.skip(Token.PRIVATE)) {\r\n        startRange = tn.range();\r\n        accessFlags |= CommonFlags.PRIVATE;\r\n      }\r\n      if (tn.peek() == Token.READONLY) {\r\n        let state = tn.mark();\r\n        tn.next();\r\n        if (tn.peek() != Token.COLON) { // modifier\r\n          tn.discard(state);\r\n          if (!startRange) startRange = tn.range();\r\n          accessFlags |= CommonFlags.READONLY;\r\n        } else { // identifier\r\n          tn.reset(state);\r\n        }\r\n      }\r\n    }\r\n    if (tn.skip(Token.DOT_DOT_DOT)) {\r\n      if (accessFlags) {\r\n        this.error(\r\n          DiagnosticCode.A_parameter_property_cannot_be_declared_using_a_rest_parameter,\r\n          tn.range()\r\n        );\r\n      } else {\r\n        startRange = tn.range();\r\n      }\r\n      isRest = true;\r\n    }\r\n    if (tn.skipIdentifier()) {\r\n      if (!isRest) startRange = tn.range();\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let type: CommonTypeNode | null = null;\r\n      if (isOptional = tn.skip(Token.QUESTION)) {\r\n        if (isRest) {\r\n          this.error(\r\n            DiagnosticCode.A_rest_parameter_cannot_be_optional,\r\n            identifier.range\r\n          );\r\n        }\r\n      }\r\n      if (tn.skip(Token.COLON)) {\r\n        type = this.parseType(tn);\r\n        if (!type) return null;\r\n      } else {\r\n        type = Node.createOmittedType(tn.range(tn.pos));\r\n      }\r\n      let initializer: Expression | null = null;\r\n      if (tn.skip(Token.EQUALS)) {\r\n        if (isRest) {\r\n          this.error(\r\n            DiagnosticCode.A_rest_parameter_cannot_have_an_initializer,\r\n            identifier.range\r\n          );\r\n        }\r\n        if (isOptional) {\r\n          this.error(\r\n            DiagnosticCode.Parameter_cannot_have_question_mark_and_initializer,\r\n            identifier.range\r\n          );\r\n        } else {\r\n          isOptional = true;\r\n        }\r\n        initializer = this.parseExpression(tn, Precedence.COMMA + 1);\r\n        if (!initializer) return null;\r\n      }\r\n      let param = Node.createParameter(\r\n        identifier,\r\n        type,\r\n        initializer,\r\n        isRest\r\n          ? ParameterKind.REST\r\n          : isOptional\r\n            ? ParameterKind.OPTIONAL\r\n            : ParameterKind.DEFAULT,\r\n        Range.join(<Range>startRange, tn.range())\r\n      );\r\n      param.flags |= accessFlags;\r\n      return param;\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseFunction(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): FunctionDeclaration | null {\r\n\r\n    // at 'function':\r\n    //  Identifier\r\n    //  ('<' TypeParameters)?\r\n    //  '(' Parameters (':' Type)?\r\n    //  '{' Statement* '}'\r\n    //  ';'?\r\n\r\n    if (!tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range(tn.pos)\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    var signatureStart: i32 = -1;\r\n\r\n    var typeParameters: TypeParameterNode[] | null = null;\r\n    if (tn.skip(Token.LESSTHAN)) {\r\n      signatureStart = tn.tokenPos;\r\n      typeParameters = this.parseTypeParameters(tn);\r\n      if (!typeParameters) return null;\r\n      flags |= CommonFlags.GENERIC;\r\n    }\r\n\r\n    if (!tn.skip(Token.OPENPAREN)) {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(tn.pos), \"(\"\r\n      );\r\n      return null;\r\n    }\r\n\r\n    if (signatureStart < 0) {\r\n      signatureStart = tn.tokenPos;\r\n    }\r\n\r\n    var parameters = this.parseParameters(tn);\r\n    if (!parameters) return null;\r\n    var thisType = this.parseParametersThis;\r\n\r\n    var isSetter = (flags & CommonFlags.SET) != 0;\r\n    if (isSetter) {\r\n      if (parameters.length != 1) {\r\n        this.error(\r\n          DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,\r\n          name.range\r\n        ); // recoverable\r\n      }\r\n      if (parameters.length && parameters[0].initializer) {\r\n        this.error(\r\n          DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,\r\n          name.range\r\n        ); // recoverable\r\n      }\r\n    }\r\n\r\n    if (flags & CommonFlags.GET) {\r\n      if (parameters.length) {\r\n        this.error(\r\n          DiagnosticCode.A_get_accessor_cannot_have_parameters,\r\n          name.range\r\n        ); // recoverable\r\n      }\r\n    }\r\n\r\n    var returnType: CommonTypeNode | null = null;\r\n    if (tn.skip(Token.COLON)) {\r\n      returnType = this.parseType(tn, true, isSetter);\r\n      if (!returnType) return null;\r\n    }\r\n\r\n    if (!returnType) {\r\n      returnType = Node.createOmittedType(\r\n        tn.range(tn.pos)\r\n      );\r\n      if (!isSetter) {\r\n        this.error(\r\n          DiagnosticCode.Type_expected,\r\n          returnType.range\r\n        ); // recoverable\r\n      }\r\n    }\r\n\r\n    var signature = Node.createSignature(\r\n      parameters,\r\n      returnType,\r\n      thisType,\r\n      false,\r\n      tn.range(signatureStart, tn.pos)\r\n    );\r\n\r\n    var body: Statement | null = null;\r\n    if (tn.skip(Token.OPENBRACE)) {\r\n      if (flags & CommonFlags.AMBIENT) {\r\n        this.error(\r\n          DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n\r\n      body = this.parseBlockStatement(tn, false);\r\n      if (!body) return null;\r\n    } else if (!(flags & CommonFlags.AMBIENT)) {\r\n      this.error(\r\n        DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,\r\n        tn.range(tn.pos)\r\n      );\r\n    }\r\n\r\n    var ret = Node.createFunctionDeclaration(\r\n      name,\r\n      typeParameters,\r\n      signature,\r\n      body,\r\n      decorators,\r\n      flags,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseFunctionExpression(tn: Tokenizer): FunctionExpression | null {\r\n    var startPos = tn.tokenPos;\r\n    var name: IdentifierExpression;\r\n    var isArrow = false;\r\n\r\n    // either at 'function':\r\n    //  Identifier?\r\n    //  '(' Parameters (':' Type)?\r\n    //  Statement\r\n\r\n    if (tn.token == Token.FUNCTION) {\r\n      if (tn.skipIdentifier()) {\r\n        name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      } else { // empty name\r\n        name = Node.createEmptyIdentifierExpression(tn.range(tn.pos));\r\n      }\r\n      if (!tn.skip(Token.OPENPAREN)) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(tn.pos), \"(\"\r\n        );\r\n        return null;\r\n      }\r\n\r\n    // or at '(' of arrow function:\r\n    //  Parameters (':' Type)?\r\n    //  Statement\r\n\r\n    } else {\r\n      isArrow = true;\r\n      assert(tn.token == Token.OPENPAREN);\r\n      name = Node.createEmptyIdentifierExpression(tn.range(tn.tokenPos));\r\n    }\r\n\r\n    // TODO: type parameters? doesn't seem worth it.\r\n\r\n    var signatureStart = tn.pos;\r\n    var parameters = this.parseParameters(tn);\r\n    if (!parameters) return null;\r\n\r\n    return this.parseFunctionExpressionCommon(tn, name, parameters, isArrow, startPos, signatureStart);\r\n  }\r\n\r\n  private parseFunctionExpressionCommon(\r\n    tn: Tokenizer,\r\n    name: IdentifierExpression,\r\n    parameters: ParameterNode[],\r\n    isArrow: bool,\r\n    startPos: i32 = -1,\r\n    signatureStart: i32 = -1\r\n  ): FunctionExpression | null {\r\n    if (startPos < 0) startPos = name.range.start;\r\n    if (signatureStart < 0) signatureStart = startPos;\r\n\r\n    var returnType: CommonTypeNode | null = null;\r\n    if (tn.skip(Token.COLON)) {\r\n      returnType = this.parseType(tn);\r\n      if (!returnType) return null;\r\n    } else {\r\n      returnType = Node.createOmittedType(tn.range(tn.pos));\r\n      this.error(\r\n        DiagnosticCode.Type_expected,\r\n        returnType.range\r\n      ); // recoverable\r\n    }\r\n\r\n    if (isArrow) {\r\n      if (!tn.skip(Token.EQUALS_GREATERTHAN)) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(tn.pos), \"=>\"\r\n        );\r\n        return null;\r\n      }\r\n    }\r\n\r\n    var signature = Node.createSignature(\r\n      parameters,\r\n      returnType,\r\n      null, // TODO?\r\n      false,\r\n      tn.range(signatureStart, tn.pos)\r\n    );\r\n\r\n    var body: Statement | null;\r\n    if (isArrow) {\r\n      body = this.parseStatement(tn, false);\r\n    } else {\r\n      if (!tn.skip(Token.OPENBRACE)) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(tn.pos), \"{\"\r\n        );\r\n        return null;\r\n      }\r\n      body = this.parseBlockStatement(tn, false);\r\n    }\r\n    if (!body) return null;\r\n\r\n    var declaration = Node.createFunctionDeclaration(\r\n      name,\r\n      null,\r\n      signature,\r\n      body,\r\n      null,\r\n      isArrow ? CommonFlags.ARROW : CommonFlags.NONE,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n    return Node.createFunctionExpression(declaration);\r\n  }\r\n\r\n  parseClassOrInterface(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): ClassDeclaration | null {\r\n\r\n    // at ('class' | 'interface'):\r\n    //   Identifier\r\n    //   ('<' TypeParameters)?\r\n    //   ('extends' Type)?\r\n    //   ('implements' Type (',' Type)*)?\r\n    //   '{' ClassMember* '}'\r\n\r\n    var isInterface = tn.token == Token.INTERFACE;\r\n\r\n    if (!tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var identifier = Node.createIdentifierExpression(\r\n      tn.readIdentifier(),\r\n      tn.range()\r\n    );\r\n\r\n    var typeParameters: TypeParameterNode[] | null;\r\n    if (tn.skip(Token.LESSTHAN)) {\r\n      typeParameters = this.parseTypeParameters(tn);\r\n      if (!typeParameters) return null;\r\n      flags |= CommonFlags.GENERIC;\r\n    } else {\r\n      typeParameters = [];\r\n    }\r\n\r\n    var extendsType: TypeNode | null = null;\r\n    if (tn.skip(Token.EXTENDS)) {\r\n      let t = this.parseType(tn);\r\n      if (!t) return null;\r\n      if (t.kind != NodeKind.TYPE) {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          t.range\r\n        );\r\n        return null;\r\n      }\r\n      extendsType = <TypeNode>t;\r\n    }\r\n\r\n    var implementsTypes: TypeNode[] | null = null;\r\n    if (tn.skip(Token.IMPLEMENTS)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode.Interface_declaration_cannot_have_implements_clause,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n      do {\r\n        let type = this.parseType(tn);\r\n        if (!type) return null;\r\n        if (!isInterface) {\r\n          if (!implementsTypes) implementsTypes = [];\r\n          implementsTypes.push(<TypeNode>type);\r\n        }\r\n      } while (tn.skip(Token.COMMA));\r\n    }\r\n\r\n    if (!tn.skip(Token.OPENBRACE)) {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"{\"\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var members = new Array<DeclarationStatement>();\r\n    var declaration: ClassDeclaration;\r\n    if (isInterface) {\r\n      assert(!implementsTypes);\r\n      declaration = Node.createInterfaceDeclaration(\r\n        identifier,\r\n        typeParameters,\r\n        extendsType,\r\n        members,\r\n        decorators,\r\n        flags,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n    } else {\r\n      declaration = Node.createClassDeclaration(\r\n        identifier,\r\n        typeParameters,\r\n        extendsType,\r\n        implementsTypes,\r\n        members,\r\n        decorators,\r\n        flags,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n    }\r\n    if (!tn.skip(Token.CLOSEBRACE)) {\r\n      do {\r\n        let member = this.parseClassMember(tn, declaration);\r\n        if (!member) return null;\r\n        member.parent = declaration;\r\n        members.push(<DeclarationStatement>member);\r\n      } while (!tn.skip(Token.CLOSEBRACE));\r\n    }\r\n    return declaration;\r\n  }\r\n\r\n  parseClassExpression(tn: Tokenizer): ClassExpression | null {\r\n\r\n    // at 'class': Identifier? '{' ... '}'\r\n\r\n    var startPos = tn.tokenPos;\r\n    var name: IdentifierExpression;\r\n\r\n    if (tn.skipIdentifier()) {\r\n      name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    } else {\r\n      name = Node.createEmptyIdentifierExpression(tn.range(tn.pos));\r\n    }\r\n\r\n    if (!tn.skip(Token.OPENBRACE)) {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(tn.pos), \"{\"\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var members = new Array<DeclarationStatement>();\r\n    var declaration = Node.createClassDeclaration(\r\n      name,\r\n      [],\r\n      null,\r\n      null,\r\n      members,\r\n      null,\r\n      CommonFlags.NONE,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n    if (!tn.skip(Token.CLOSEBRACE)) {\r\n      do {\r\n        let member = this.parseClassMember(tn, declaration);\r\n        if (!member) return null;\r\n        member.parent = declaration;\r\n        members.push(<DeclarationStatement>member);\r\n      } while (!tn.skip(Token.CLOSEBRACE));\r\n    }\r\n    return Node.createClassExpression(declaration);\r\n  }\r\n\r\n  parseClassMember(\r\n    tn: Tokenizer,\r\n    parent: ClassDeclaration\r\n  ): DeclarationStatement | null {\r\n\r\n    // before:\r\n    //   ('public' | 'private' | 'protected')?\r\n    //   ('static' | 'abstract')?\r\n    //   'readonly'?\r\n    //   ('get' | 'set')?\r\n    //   Identifier ...\r\n\r\n    var startPos = tn.pos;\r\n    var isInterface = parent.kind == NodeKind.INTERFACEDECLARATION;\r\n\r\n    var decorators = new Array<DecoratorNode>();\r\n    while (tn.skip(Token.AT)) {\r\n      let decorator = this.parseDecorator(tn);\r\n      if (!decorator) break;\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode.Decorators_are_not_valid_here,\r\n          decorator.range\r\n        );\r\n      }\r\n      decorators.push(<DecoratorNode>decorator);\r\n    }\r\n\r\n    // inherit ambient status\r\n    var flags = parent.flags & CommonFlags.AMBIENT;\r\n\r\n    // implemented methods are virtual\r\n    if (isInterface) flags |= CommonFlags.VIRTUAL;\r\n\r\n    if (tn.skip(Token.PUBLIC)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(), \"public\"\r\n        );\r\n      }\r\n      flags |= CommonFlags.PUBLIC;\r\n    } else if (tn.skip(Token.PRIVATE)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(), \"private\"\r\n        );\r\n      }\r\n      flags |= CommonFlags.PRIVATE;\r\n    } else if (tn.skip(Token.PROTECTED)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(), \"protected\"\r\n        );\r\n      }\r\n      flags |= CommonFlags.PROTECTED;\r\n    }\r\n\r\n    var staticStart: i32 = 0;\r\n    var staticEnd: i32 = 0;\r\n    var abstractStart: i32 = 0;\r\n    var abstractEnd: i32 = 0;\r\n    if (tn.skip(Token.STATIC)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(), \"static\"\r\n        );\r\n      }\r\n      flags |= CommonFlags.STATIC;\r\n      staticStart = tn.tokenPos;\r\n      staticEnd = tn.pos;\r\n    } else {\r\n      flags |= CommonFlags.INSTANCE;\r\n      if (tn.skip(Token.ABSTRACT)) {\r\n        if (isInterface) {\r\n          this.error(\r\n            DiagnosticCode._0_modifier_cannot_be_used_here,\r\n            tn.range(), \"abstract\"\r\n          );\r\n        }\r\n        flags |= CommonFlags.ABSTRACT;\r\n        abstractStart = tn.tokenPos;\r\n        abstractEnd = tn.pos;\r\n      }\r\n      if (parent.flags & CommonFlags.GENERIC) {\r\n        flags |= CommonFlags.GENERIC_CONTEXT;\r\n      }\r\n    }\r\n\r\n    var readonlyStart: i32 = 0;\r\n    var readonlyEnd: i32 = 0;\r\n    if (tn.skip(Token.READONLY)) {\r\n      flags |= CommonFlags.READONLY;\r\n      readonlyStart = tn.tokenPos;\r\n      readonlyEnd = tn.pos;\r\n    }\r\n\r\n    // check if accessor: ('get' | 'set') ^\\n Identifier\r\n    var state = tn.mark();\r\n    var isConstructor = false;\r\n    var isGetter = false;\r\n    var getStart: i32 = 0;\r\n    var getEnd: i32 = 0;\r\n    var isSetter = false;\r\n    var setStart: i32 = 0;\r\n    var setEnd: i32 = 0;\r\n    if (!isInterface) {\r\n      if (tn.skip(Token.GET)) {\r\n        if (tn.peek(true, IdentifierHandling.PREFER) == Token.IDENTIFIER && !tn.nextTokenOnNewLine) {\r\n          flags |= CommonFlags.GET;\r\n          isGetter = true;\r\n          setStart = tn.tokenPos;\r\n          setEnd = tn.pos;\r\n          if (flags & CommonFlags.READONLY) {\r\n            this.error(\r\n              DiagnosticCode._0_modifier_cannot_be_used_here,\r\n              tn.range(readonlyStart, readonlyEnd), \"readonly\"\r\n            ); // recoverable\r\n          }\r\n        } else {\r\n          tn.reset(state);\r\n        }\r\n      } else if (tn.skip(Token.SET)) {\r\n        if (tn.peek(true, IdentifierHandling.PREFER) == Token.IDENTIFIER && !tn.nextTokenOnNewLine) {\r\n          flags |= CommonFlags.SET | CommonFlags.SET;\r\n          isSetter = true;\r\n          setStart = tn.tokenPos;\r\n          setEnd = tn.pos;\r\n          if (flags & CommonFlags.READONLY) {\r\n            this.error(\r\n              DiagnosticCode._0_modifier_cannot_be_used_here,\r\n              tn.range(readonlyStart, readonlyEnd), \"readonly\"\r\n            ); // recoverable\r\n          }\r\n        } else {\r\n          tn.reset(state);\r\n        }\r\n      } else if (tn.skip(Token.CONSTRUCTOR)) {\r\n        flags |= CommonFlags.CONSTRUCTOR;\r\n        isConstructor = true;\r\n        if (flags & CommonFlags.STATIC) {\r\n          this.error(\r\n            DiagnosticCode._0_modifier_cannot_be_used_here,\r\n            tn.range(staticStart, staticEnd), \"static\"\r\n          ); // recoverable\r\n        }\r\n        if (flags & CommonFlags.ABSTRACT) {\r\n          this.error(\r\n            DiagnosticCode._0_modifier_cannot_be_used_here,\r\n            tn.range(abstractStart, abstractEnd), \"abstract\"\r\n          ); // recoverable\r\n        }\r\n        if (flags & CommonFlags.READONLY) {\r\n          this.error(\r\n            DiagnosticCode._0_modifier_cannot_be_used_here,\r\n            tn.range(readonlyStart, readonlyEnd), \"readonly\"\r\n          ); // recoverable\r\n        }\r\n      }\r\n    }\r\n\r\n    if (!isConstructor && !tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var name = isConstructor\r\n      ? Node.createConstructorExpression(tn.range())\r\n      : Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    var typeParameters: TypeParameterNode[] | null = null;\r\n    if (tn.skip(Token.LESSTHAN)) {\r\n      let typeParametersStart = tn.tokenPos;\r\n      typeParameters = this.parseTypeParameters(tn);\r\n      if (!typeParameters) return null;\r\n      if (isConstructor) {\r\n        this.error(\r\n          DiagnosticCode.Type_parameters_cannot_appear_on_a_constructor_declaration,\r\n          tn.range(typeParametersStart, tn.pos)\r\n        ); // recoverable\r\n      } else if (isGetter || isSetter) {\r\n        this.error(\r\n          DiagnosticCode.An_accessor_cannot_have_type_parameters,\r\n          tn.range(typeParametersStart, tn.pos)\r\n        ); // recoverable\r\n      } else {\r\n        flags |= CommonFlags.GENERIC;\r\n      }\r\n    }\r\n\r\n    // method: '(' Parameters (':' Type)? '{' Statement* '}' ';'?\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let signatureStart = tn.tokenPos;\r\n      let parameters = this.parseParameters(tn, isConstructor);\r\n      if (!parameters) return null;\r\n      let thisType = this.parseParametersThis;\r\n      if (isConstructor) {\r\n        for (let i = 0, k = parameters.length; i < k; ++i) {\r\n          let parameter = parameters[i];\r\n          if (parameter.isAny(\r\n            CommonFlags.PUBLIC |\r\n            CommonFlags.PROTECTED |\r\n            CommonFlags.PRIVATE |\r\n            CommonFlags.READONLY\r\n          )) {\r\n            let implicitFieldDeclaration = Node.createFieldDeclaration(\r\n              parameter.name,\r\n              parameter.type,\r\n              null, // initialized via parameter\r\n              null,\r\n              parameter.flags | CommonFlags.INSTANCE,\r\n              parameter.range\r\n            );\r\n            implicitFieldDeclaration.parameterIndex = i;\r\n            implicitFieldDeclaration.parent = parent;\r\n            parameter.implicitFieldDeclaration = implicitFieldDeclaration;\r\n            parent.members.push(implicitFieldDeclaration);\r\n          }\r\n        }\r\n      } else if (isGetter) {\r\n        if (parameters.length) {\r\n          this.error(\r\n            DiagnosticCode.A_get_accessor_cannot_have_parameters,\r\n            name.range\r\n          );\r\n        }\r\n      } else if (isSetter) {\r\n        if (parameters.length != 1) {\r\n          this.error(\r\n            DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,\r\n            name.range\r\n          );\r\n        }\r\n        if (parameters.length && parameters[0].initializer) {\r\n          this.error(\r\n            DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,\r\n            name.range\r\n          );\r\n        }\r\n      }\r\n\r\n      let returnType: CommonTypeNode | null = null;\r\n      if (tn.skip(Token.COLON)) {\r\n        if (name.kind == NodeKind.CONSTRUCTOR) {\r\n          this.error(\r\n            DiagnosticCode.Type_annotation_cannot_appear_on_a_constructor_declaration,\r\n            tn.range()\r\n          );\r\n        } else if (isSetter) {\r\n          this.error(\r\n            DiagnosticCode.A_set_accessor_cannot_have_a_return_type_annotation,\r\n            tn.range()\r\n          );\r\n        }\r\n        returnType = this.parseType(tn, name.kind == NodeKind.CONSTRUCTOR || isSetter);\r\n        if (!returnType) return null;\r\n      } else {\r\n        returnType = Node.createOmittedType(tn.range(tn.pos));\r\n        if (!isSetter && name.kind != NodeKind.CONSTRUCTOR) {\r\n          this.error(\r\n            DiagnosticCode.Type_expected,\r\n            returnType.range\r\n          ); // recoverable\r\n        }\r\n      }\r\n\r\n      let signature = Node.createSignature(\r\n        parameters,\r\n        returnType,\r\n        thisType,\r\n        false,\r\n        tn.range(signatureStart, tn.pos)\r\n      );\r\n\r\n      let body: Statement | null = null;\r\n      if (tn.skip(Token.OPENBRACE)) {\r\n        if (flags & CommonFlags.AMBIENT) {\r\n          this.error(\r\n            DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,\r\n            tn.range()\r\n          ); // recoverable\r\n        } else if (flags & CommonFlags.ABSTRACT) {\r\n          this.error(\r\n            DiagnosticCode.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract,\r\n            tn.range(), name.text\r\n          ); // recoverable\r\n        }\r\n        body = this.parseBlockStatement(tn, false);\r\n        if (!body) return null;\r\n      } else if (!(flags & CommonFlags.AMBIENT) && !isInterface) {\r\n        this.error(\r\n          DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n\r\n      let retMethod = Node.createMethodDeclaration(\r\n        name,\r\n        typeParameters,\r\n        signature,\r\n        body,\r\n        decorators,\r\n        flags,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n      tn.skip(Token.SEMICOLON);\r\n      return retMethod;\r\n\r\n    } else if (isConstructor) {\r\n      this.error(\r\n        DiagnosticCode.Constructor_implementation_is_missing,\r\n        name.range\r\n      );\r\n\r\n    } else if (isGetter || isSetter) {\r\n      this.error(\r\n        DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,\r\n        name.range\r\n      );\r\n\r\n    // field: (':' Type)? ('=' Expression)? ';'?\r\n    } else {\r\n      if (flags & CommonFlags.ABSTRACT) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(abstractStart, abstractEnd), \"abstract\"\r\n        ); // recoverable\r\n      }\r\n\r\n      if (flags & CommonFlags.GET) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(getStart, getEnd), \"get\"\r\n        ); // recoverable\r\n      }\r\n\r\n      if (flags & CommonFlags.SET) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(setStart, setEnd), \"set\"\r\n        ); // recoverable\r\n      }\r\n\r\n      let type: CommonTypeNode | null = null;\r\n      if (tn.skip(Token.COLON)) {\r\n        type = this.parseType(tn);\r\n        if (!type) return null;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Type_expected,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n      let initializer: Expression | null = null;\r\n      if (tn.skip(Token.EQUALS)) {\r\n        initializer = this.parseExpression(tn);\r\n        if (!initializer) return null;\r\n      }\r\n      let retField = Node.createFieldDeclaration(\r\n        name,\r\n        type,\r\n        initializer,\r\n        decorators,\r\n        flags,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n      tn.skip(Token.SEMICOLON);\r\n      return retField;\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseNamespace(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): NamespaceDeclaration | null {\r\n\r\n    // at 'namespace': Identifier '{' (Variable | Function)* '}'\r\n\r\n    if (tn.skipIdentifier()) {\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      if (tn.skip(Token.OPENBRACE)) {\r\n        let members = new Array<Statement>();\r\n        let ns = Node.createNamespaceDeclaration(\r\n          identifier,\r\n          members,\r\n          decorators,\r\n          flags,\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n        while (!tn.skip(Token.CLOSEBRACE)) {\r\n          let member = this.parseTopLevelStatement(tn, ns);\r\n          if (!member) return null;\r\n          member.parent = ns;\r\n          members.push(member);\r\n        }\r\n        tn.skip(Token.SEMICOLON);\r\n        return ns;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"{\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseExport(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    startPos: i32\r\n  ): ExportStatement | null {\r\n\r\n    // at 'export': '{' ExportMember (',' ExportMember)* }' ('from' StringLiteral)? ';'?\r\n\r\n    var path: StringLiteralExpression | null = null;\r\n    if (tn.skip(Token.OPENBRACE)) {\r\n      let members = new Array<ExportMember>();\r\n      while (!tn.skip(Token.CLOSEBRACE)) {\r\n          let member = this.parseExportMember(tn);\r\n          if (!member) return null;\r\n          members.push(member);\r\n        if (!tn.skip(Token.COMMA)) {\r\n          if (tn.skip(Token.CLOSEBRACE)) {\r\n            break;\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"}\"\r\n            );\r\n            return null;\r\n          }\r\n        }\r\n      }\r\n      if (tn.skip(Token.FROM)) {\r\n        if (tn.skip(Token.STRINGLITERAL)) {\r\n          path = Node.createStringLiteralExpression(tn.readString(), tn.range());\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.String_literal_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n      let ret = Node.createExportStatement(members, path, flags, tn.range(startPos, tn.pos));\r\n      let internalPath = ret.internalPath;\r\n      if (internalPath !== null && !this.seenlog.has(internalPath)) {\r\n        this.backlog.push(internalPath);\r\n        this.seenlog.add(internalPath);\r\n      }\r\n      tn.skip(Token.SEMICOLON);\r\n      return ret;\r\n    } else if (tn.skip(Token.ASTERISK)) {\r\n      if (tn.skip(Token.FROM)) {\r\n        if (tn.skip(Token.STRINGLITERAL)) {\r\n          path = Node.createStringLiteralExpression(tn.readString(), tn.range());\r\n          let ret = Node.createExportStatement(null, path, flags, tn.range(startPos, tn.pos));\r\n          let internalPath = assert(ret.internalPath);\r\n          let source = tn.source;\r\n          if (!source.exportPaths) source.exportPaths = new Set();\r\n          source.exportPaths.add(internalPath);\r\n          if (!this.seenlog.has(internalPath)) {\r\n            this.backlog.push(internalPath);\r\n            this.seenlog.add(internalPath);\r\n          }\r\n          tn.skip(Token.SEMICOLON);\r\n          return ret;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.String_literal_expected,\r\n            tn.range()\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"from\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"{\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseExportMember(\r\n    tn: Tokenizer\r\n  ): ExportMember | null {\r\n\r\n    // before: Identifier ('as' Identifier)?\r\n\r\n    if (tn.skipIdentifier()) {\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let asIdentifier: IdentifierExpression | null = null;\r\n      if (tn.skip(Token.AS)) {\r\n        if (tn.skipIdentifierName()) {\r\n          asIdentifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n      return Node.createExportMember(\r\n        identifier,\r\n        asIdentifier,\r\n        asIdentifier\r\n          ? Range.join(identifier.range, asIdentifier.range)\r\n          : identifier.range\r\n      );\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseImport(\r\n    tn: Tokenizer\r\n  ): ImportStatement | null {\r\n\r\n    // at 'import':\r\n    //  ('{' (ImportMember (',' ImportMember)* '}') | ('*' 'as' Identifier)?\r\n    //  'from' StringLiteral ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var members: ImportDeclaration[] | null = null;\r\n    var namespaceName: IdentifierExpression | null = null;\r\n    var skipFrom = false;\r\n    if (tn.skip(Token.OPENBRACE)) {\r\n      members = new Array();\r\n      while (!tn.skip(Token.CLOSEBRACE)) {\r\n        let member = this.parseImportDeclaration(tn);\r\n        if (!member) return null;\r\n        members.push(member);\r\n        if (!tn.skip(Token.COMMA)) {\r\n          if (tn.skip(Token.CLOSEBRACE)) {\r\n            break;\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"}\"\r\n            );\r\n            return null;\r\n          }\r\n        }\r\n      }\r\n    } else if (tn.skip(Token.ASTERISK)) {\r\n      if (tn.skip(Token.AS)) {\r\n        if (tn.skipIdentifier()) {\r\n          namespaceName = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"as\"\r\n        );\r\n        return null;\r\n      }\r\n    } else {\r\n      skipFrom = true;\r\n    }\r\n\r\n    if (skipFrom || tn.skip(Token.FROM)) {\r\n      if (tn.skip(Token.STRINGLITERAL)) {\r\n        let path = Node.createStringLiteralExpression(tn.readString(), tn.range());\r\n        let ret: ImportStatement;\r\n        if (namespaceName) {\r\n          assert(!members);\r\n          ret = Node.createImportStatementWithWildcard(namespaceName, path, tn.range(startPos, tn.pos));\r\n        } else {\r\n          ret = Node.createImportStatement(members, path, tn.range(startPos, tn.pos));\r\n        }\r\n        let internalPath = ret.internalPath;\r\n        if (!this.seenlog.has(internalPath)) {\r\n          this.backlog.push(internalPath);\r\n          this.seenlog.add(internalPath);\r\n        }\r\n        tn.skip(Token.SEMICOLON);\r\n        return ret;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.String_literal_expected,\r\n          tn.range()\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"from\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseImportDeclaration(\r\n    tn: Tokenizer\r\n  ): ImportDeclaration | null {\r\n\r\n    // before: Identifier ('as' Identifier)?\r\n\r\n    if (tn.skipIdentifierName()) {\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let asIdentifier: IdentifierExpression | null = null;\r\n      if (tn.skip(Token.AS)) {\r\n        if (tn.skipIdentifier()) {\r\n          asIdentifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n      return Node.createImportDeclaration(\r\n        identifier,\r\n        asIdentifier,\r\n        asIdentifier\r\n          ? Range.join(identifier.range, asIdentifier.range)\r\n          : identifier.range\r\n      );\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseExportImport(\r\n    tn: Tokenizer,\r\n    startPos: i32\r\n  ): ExportImportStatement | null {\r\n\r\n    // at 'export' 'import': Identifier ('=' Identifier)? ';'?\r\n\r\n    if (tn.skipIdentifier()) {\r\n      let asIdentifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      if (tn.skip(Token.EQUALS)) {\r\n        if (tn.skipIdentifier()) {\r\n          let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n          let ret = Node.createExportImportStatement(identifier, asIdentifier, tn.range(startPos, tn.pos));\r\n          tn.skip(Token.SEMICOLON);\r\n          return ret;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"=\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseStatement(\r\n    tn: Tokenizer,\r\n    topLevel: bool = false\r\n  ): Statement | null {\r\n\r\n    // at previous token\r\n\r\n    var state = tn.mark();\r\n    var token = tn.next();\r\n    var statement: Statement | null = null;\r\n    switch (token) {\r\n      case Token.BREAK: {\r\n        statement = this.parseBreak(tn);\r\n        break;\r\n      }\r\n      case Token.CONST: {\r\n        statement = this.parseVariable(tn, CommonFlags.CONST, null, tn.tokenPos);\r\n        break;\r\n      }\r\n      case Token.CONTINUE: {\r\n        statement = this.parseContinue(tn);\r\n        break;\r\n      }\r\n      case Token.DO: {\r\n        statement = this.parseDoStatement(tn);\r\n        break;\r\n      }\r\n      case Token.FOR: {\r\n        statement = this.parseForStatement(tn);\r\n        break;\r\n      }\r\n      case Token.IF: {\r\n        statement = this.parseIfStatement(tn);\r\n        break;\r\n      }\r\n      case Token.LET: {\r\n        statement = this.parseVariable(tn, CommonFlags.LET, null, tn.tokenPos);\r\n        break;\r\n      }\r\n      case Token.VAR: {\r\n        statement = this.parseVariable(tn, CommonFlags.NONE, null, tn.tokenPos);\r\n        break;\r\n      }\r\n      case Token.OPENBRACE: {\r\n        statement = this.parseBlockStatement(tn, topLevel);\r\n        break;\r\n      }\r\n      case Token.RETURN: {\r\n        if (topLevel) {\r\n          this.error(\r\n            DiagnosticCode.A_return_statement_can_only_be_used_within_a_function_body,\r\n            tn.range()\r\n          ); // recoverable\r\n        }\r\n        statement = this.parseReturn(tn);\r\n        break;\r\n      }\r\n      case Token.SEMICOLON: {\r\n        return Node.createEmptyStatement(tn.range(tn.tokenPos));\r\n      }\r\n      case Token.SWITCH: {\r\n        statement = this.parseSwitchStatement(tn);\r\n        break;\r\n      }\r\n      case Token.THROW: {\r\n        statement = this.parseThrowStatement(tn);\r\n        break;\r\n      }\r\n      case Token.TRY: {\r\n        statement = this.parseTryStatement(tn);\r\n        break;\r\n      }\r\n      case Token.VOID: {\r\n        statement = this.parseVoidStatement(tn);\r\n        break;\r\n      }\r\n      case Token.WHILE: {\r\n        statement = this.parseWhileStatement(tn);\r\n        break;\r\n      }\r\n      case Token.TYPE: { // also identifier\r\n        if (tn.peek(false, IdentifierHandling.PREFER) == Token.IDENTIFIER) {\r\n          statement = this.parseTypeDeclaration(tn, CommonFlags.NONE, null, tn.tokenPos);\r\n          break;\r\n        }\r\n        // fall-through\r\n      }\r\n      default: {\r\n        tn.reset(state);\r\n        statement = this.parseExpressionStatement(tn);\r\n        break;\r\n      }\r\n    }\r\n    if (!statement) { // has been reported\r\n      tn.reset(state);\r\n      this.skipStatement(tn);\r\n    } else {\r\n      tn.discard(state);\r\n    }\r\n    return statement;\r\n  }\r\n\r\n  parseBlockStatement(\r\n    tn: Tokenizer,\r\n    topLevel: bool\r\n  ): BlockStatement | null {\r\n\r\n    // at '{': Statement* '}' ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var statements = new Array<Statement>();\r\n    while (!tn.skip(Token.CLOSEBRACE)) {\r\n      let state = tn.mark();\r\n      let statement = this.parseStatement(tn, topLevel);\r\n      if (!statement) {\r\n        if (tn.token == Token.ENDOFFILE) return null;\r\n        tn.reset(state);\r\n        this.skipStatement(tn);\r\n      } else {\r\n        tn.discard(state);\r\n        statements.push(statement);\r\n      }\r\n    }\r\n    var ret = Node.createBlockStatement(statements, tn.range(startPos, tn.pos));\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseBreak(\r\n    tn: Tokenizer\r\n  ): BreakStatement | null {\r\n\r\n    // at 'break': Identifier? ';'?\r\n\r\n    var identifier: IdentifierExpression | null = null;\r\n    if (tn.peek(true) == Token.IDENTIFIER && !tn.nextTokenOnNewLine) {\r\n      tn.next(IdentifierHandling.PREFER);\r\n      identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    }\r\n    var ret = Node.createBreakStatement(identifier, tn.range());\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseContinue(\r\n    tn: Tokenizer\r\n  ): ContinueStatement | null {\r\n\r\n    // at 'continue': Identifier? ';'?\r\n\r\n    var identifier: IdentifierExpression | null = null;\r\n    if (tn.peek(true) == Token.IDENTIFIER && !tn.nextTokenOnNewLine) {\r\n      tn.next(IdentifierHandling.PREFER);\r\n      identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    }\r\n    var ret = Node.createContinueStatement(identifier, tn.range());\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseDoStatement(\r\n    tn: Tokenizer\r\n  ): DoStatement | null {\r\n\r\n    // at 'do': Statement 'while' '(' Expression ')' ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var statement = this.parseStatement(tn);\r\n    if (!statement) return null;\r\n\r\n    if (tn.skip(Token.WHILE)) {\r\n\r\n      if (tn.skip(Token.OPENPAREN)) {\r\n        let condition = this.parseExpression(tn);\r\n        if (!condition) return null;\r\n\r\n        if (tn.skip(Token.CLOSEPAREN)) {\r\n          let ret = Node.createDoStatement(<Statement>statement, <Expression>condition, tn.range(startPos, tn.pos));\r\n          tn.skip(Token.SEMICOLON);\r\n          return ret;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"(\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"while\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseExpressionStatement(\r\n    tn: Tokenizer\r\n  ): ExpressionStatement | null {\r\n\r\n    // at previous token\r\n\r\n    var expr = this.parseExpression(tn);\r\n    if (!expr) return null;\r\n\r\n    var ret = Node.createExpressionStatement(expr);\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseForStatement(\r\n    tn: Tokenizer\r\n  ): ForStatement | null {\r\n\r\n    // at 'for': '(' Statement? Expression? ';' Expression? ')' Statement\r\n\r\n    var startPos = tn.tokenPos;\r\n\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let initializer: Statement | null = null;\r\n\r\n      if (tn.skip(Token.CONST)) {\r\n        initializer = this.parseVariable(tn, CommonFlags.CONST, null, tn.tokenPos);\r\n      } else if (tn.skip(Token.LET)) {\r\n        initializer = this.parseVariable(tn, CommonFlags.LET, null, tn.tokenPos);\r\n      } else if (tn.skip(Token.VAR)) {\r\n        initializer = this.parseVariable(tn, CommonFlags.NONE, null, tn.tokenPos);\r\n\r\n      } else if (!tn.skip(Token.SEMICOLON)) {\r\n        initializer = this.parseExpressionStatement(tn);\r\n        if (!initializer) return null;\r\n      }\r\n\r\n      if (tn.token == Token.SEMICOLON) {\r\n        let condition: ExpressionStatement | null = null;\r\n        if (!tn.skip(Token.SEMICOLON)) {\r\n          condition = this.parseExpressionStatement(tn);\r\n          if (!condition) return null;\r\n        }\r\n\r\n        if (tn.token == Token.SEMICOLON) {\r\n          let incrementor: Expression | null = null;\r\n          if (!tn.skip(Token.CLOSEPAREN)) {\r\n            incrementor = this.parseExpression(tn);\r\n            if (!incrementor) return null;\r\n\r\n            if (!tn.skip(Token.CLOSEPAREN)) {\r\n              this.error(\r\n                DiagnosticCode._0_expected,\r\n                tn.range(), \")\"\r\n              );\r\n              return null;\r\n            }\r\n          }\r\n\r\n          let statement = this.parseStatement(tn);\r\n          if (!statement) return null;\r\n\r\n          return Node.createForStatement(\r\n            initializer,\r\n            condition\r\n              ? condition.expression\r\n              : null,\r\n            incrementor,\r\n            statement,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \";\"\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \";\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"(\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseIfStatement(\r\n    tn: Tokenizer\r\n  ): IfStatement | null {\r\n\r\n    // at 'if': '(' Expression ')' Statement ('else' Statement)?\r\n\r\n    var startPos = tn.tokenPos;\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let condition = this.parseExpression(tn);\r\n      if (!condition) return null;\r\n      if (tn.skip(Token.CLOSEPAREN)) {\r\n        let statement = this.parseStatement(tn);\r\n        if (!statement) return null;\r\n        let elseStatement: Statement | null = null;\r\n        if (tn.skip(Token.ELSE)) {\r\n          elseStatement = this.parseStatement(tn);\r\n          if (!elseStatement) return null;\r\n        }\r\n        return Node.createIfStatement(\r\n          condition,\r\n          statement,\r\n          elseStatement,\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \")\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"(\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseSwitchStatement(\r\n    tn: Tokenizer\r\n  ): SwitchStatement | null {\r\n\r\n    // at 'switch': '(' Expression ')' '{' SwitchCase* '}' ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let condition = this.parseExpression(tn);\r\n      if (!condition) return null;\r\n      if (tn.skip(Token.CLOSEPAREN)) {\r\n        if (tn.skip(Token.OPENBRACE)) {\r\n          let cases = new Array<SwitchCase>();\r\n          while (!tn.skip(Token.CLOSEBRACE)) {\r\n            let case_ = this.parseSwitchCase(tn);\r\n            if (!case_) return null;\r\n            cases.push(<SwitchCase>case_);\r\n          }\r\n          let ret = Node.createSwitchStatement(condition, cases, tn.range(startPos, tn.pos));\r\n          tn.skip(Token.SEMICOLON);\r\n          return ret;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"{\"\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \")\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"(\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseSwitchCase(\r\n    tn: Tokenizer\r\n  ): SwitchCase | null {\r\n\r\n    var startPos = tn.tokenPos;\r\n    var statements: Statement[],\r\n        statement: Statement | null;\r\n\r\n    // 'case' Expression ':' Statement*\r\n\r\n    if (tn.skip(Token.CASE)) {\r\n      let label = this.parseExpression(tn);\r\n      if (!label) return null;\r\n      if (tn.skip(Token.COLON)) {\r\n        statements = new Array<Statement>();\r\n        while (tn.peek() != Token.CASE && tn.nextToken != Token.DEFAULT && tn.nextToken != Token.CLOSEBRACE) {\r\n          statement = this.parseStatement(tn);\r\n          if (!statement) return null;\r\n          statements.push(statement);\r\n        }\r\n        return Node.createSwitchCase(label, statements, tn.range(startPos, tn.pos));\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \":\"\r\n        );\r\n      }\r\n\r\n    // 'default' ':' Statement*\r\n\r\n    } else if (tn.skip(Token.DEFAULT)) {\r\n      if (tn.skip(Token.COLON)) {\r\n        statements = new Array<Statement>();\r\n        while (tn.peek() != Token.CASE && tn.nextToken != Token.DEFAULT && tn.nextToken != Token.CLOSEBRACE) {\r\n          statement = this.parseStatement(tn);\r\n          if (!statement) return null;\r\n          statements.push(statement);\r\n        }\r\n        return Node.createSwitchCase(null, statements, tn.range(startPos, tn.pos));\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \":\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._case_or_default_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseThrowStatement(\r\n    tn: Tokenizer\r\n  ): ThrowStatement | null {\r\n\r\n    // at 'throw': Expression ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var expression = this.parseExpression(tn);\r\n    if (!expression) return null;\r\n    var ret = Node.createThrowStatement(<Expression>expression, tn.range(startPos, tn.pos));\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseTryStatement(\r\n    tn: Tokenizer\r\n  ): TryStatement | null {\r\n\r\n    // at 'try':\r\n    //   '{' Statement* '}'\r\n    //   ('catch' '(' VariableMember ')' '{' Statement* '}')?\r\n    //   ('finally' '{' Statement* '}'? ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var stmt: Statement | null;\r\n    if (tn.skip(Token.OPENBRACE)) {\r\n      let statements = new Array<Statement>();\r\n      while (!tn.skip(Token.CLOSEBRACE)) {\r\n        stmt = this.parseStatement(tn);\r\n        if (!stmt) return null;\r\n        statements.push(<Statement>stmt);\r\n      }\r\n      let catchVariable: IdentifierExpression | null = null;\r\n      let catchStatements: Statement[] | null = null;\r\n      let finallyStatements: Statement[] | null = null;\r\n      if (tn.skip(Token.CATCH)) {\r\n        if (!tn.skip(Token.OPENPAREN)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"(\"\r\n          );\r\n          return null;\r\n        }\r\n        if (!tn.skipIdentifier()) {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n        catchVariable = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n        if (!tn.skip(Token.CLOSEPAREN)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n        if (!tn.skip(Token.OPENBRACE)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"{\"\r\n          );\r\n          return null;\r\n        }\r\n        catchStatements = [];\r\n        while (!tn.skip(Token.CLOSEBRACE)) {\r\n          stmt = this.parseStatement(tn);\r\n          if (!stmt) return null;\r\n          catchStatements.push(<Statement>stmt);\r\n        }\r\n      }\r\n      if (tn.skip(Token.FINALLY)) {\r\n        if (!tn.skip(Token.OPENBRACE)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"{\"\r\n          );\r\n          return null;\r\n        }\r\n        finallyStatements = [];\r\n        while (!tn.skip(Token.CLOSEBRACE)) {\r\n          stmt = this.parseStatement(tn);\r\n          if (!stmt) return null;\r\n          finallyStatements.push(<Statement>stmt);\r\n        }\r\n      }\r\n      if (!(catchStatements || finallyStatements)) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"catch\"\r\n        );\r\n        return null;\r\n      }\r\n      let ret = Node.createTryStatement(\r\n        statements,\r\n        catchVariable,\r\n        catchStatements,\r\n        finallyStatements,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n      tn.skip(Token.SEMICOLON);\r\n      return ret;\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"{\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseTypeDeclaration(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): TypeDeclaration | null {\r\n\r\n    // at 'type': Identifier ('<' TypeParameters '>')? '=' Type ';'?\r\n\r\n    if (tn.skipIdentifier()) {\r\n      let name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let typeParameters: TypeParameterNode[] | null = null;\r\n      if (tn.skip(Token.LESSTHAN)) {\r\n        typeParameters = this.parseTypeParameters(tn);\r\n        if (!typeParameters) return null;\r\n        flags |= CommonFlags.GENERIC;\r\n      }\r\n      if (tn.skip(Token.EQUALS)) {\r\n        let type = this.parseType(tn);\r\n        if (!type) return null;\r\n        let ret = Node.createTypeDeclaration(\r\n          name,\r\n          typeParameters,\r\n          type,\r\n          decorators,\r\n          flags,\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n        tn.skip(Token.SEMICOLON);\r\n        return ret;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"=\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseVoidStatement(\r\n    tn: Tokenizer\r\n  ): VoidStatement | null {\r\n\r\n    // at 'void': Expression ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var expression = this.parseExpression(tn, Precedence.GROUPING);\r\n    if (!expression) return null;\r\n    var ret = Node.createVoidStatement(expression, tn.range(startPos, tn.pos));\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseWhileStatement(\r\n    tn: Tokenizer\r\n  ): WhileStatement | null {\r\n\r\n    // at 'while': '(' Expression ')' Statement ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let expression = this.parseExpression(tn);\r\n      if (!expression) return null;\r\n      if (tn.skip(Token.CLOSEPAREN)) {\r\n        let statement = this.parseStatement(tn);\r\n        if (!statement) return null;\r\n        let ret = Node.createWhileStatement(expression, statement, tn.range(startPos, tn.pos));\r\n        tn.skip(Token.SEMICOLON);\r\n        return ret;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \")\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"(\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  // expressions\r\n  // see: http://www.engr.mun.ca/~theo/Misc/exp_parsing.htm#climbing\r\n\r\n  parseExpressionStart(\r\n    tn: Tokenizer\r\n  ): Expression | null {\r\n\r\n    var token = tn.next(IdentifierHandling.PREFER);\r\n    var startPos = tn.tokenPos;\r\n    var precedence = determinePrecedenceStart(token);\r\n    if (precedence != Precedence.NONE) {\r\n      let operand: Expression | null;\r\n\r\n      // TODO: SpreadExpression, YieldExpression (currently become unsupported UnaryPrefixExpressions)\r\n\r\n      // NewExpression\r\n      if (token == Token.NEW) {\r\n        operand = this.parseExpression(tn, Precedence.CALL);\r\n        if (!operand) return null;\r\n        if (operand.kind == NodeKind.CALL) {\r\n          return Node.createNewExpression(\r\n            (<CallExpression>operand).expression,\r\n            (<CallExpression>operand).typeArguments,\r\n            (<CallExpression>operand).arguments,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            tn.range()\r\n          );\r\n        }\r\n        return null;\r\n      } else {\r\n        operand = this.parseExpression(tn, precedence);\r\n        if (!operand) return null;\r\n      }\r\n\r\n      // UnaryPrefixExpression\r\n      if (token == Token.PLUS_PLUS || token == Token.MINUS_MINUS) {\r\n        if (\r\n          operand.kind != NodeKind.IDENTIFIER &&\r\n          operand.kind != NodeKind.ELEMENTACCESS &&\r\n          operand.kind != NodeKind.PROPERTYACCESS\r\n        ) {\r\n          this.error(\r\n            DiagnosticCode.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access,\r\n            operand.range\r\n          );\r\n        }\r\n      }\r\n      return Node.createUnaryPrefixExpression(token, operand, tn.range(startPos, tn.pos));\r\n    }\r\n\r\n    var expr: Expression | null = null;\r\n    switch (token) {\r\n\r\n      case Token.NULL: return Node.createNullExpression(tn.range());\r\n      case Token.TRUE: return Node.createTrueExpression(tn.range());\r\n      case Token.FALSE: return Node.createFalseExpression(tn.range());\r\n\r\n      // ParenthesizedExpression\r\n      // FunctionExpression\r\n      case Token.OPENPAREN: {\r\n\r\n        // determine whether this is a function expression\r\n        if (tn.skip(Token.CLOSEPAREN)) { // must be a function expression (fast route)\r\n          return this.parseFunctionExpressionCommon(\r\n            tn,\r\n            Node.createEmptyIdentifierExpression(tn.range(startPos)),\r\n            [],\r\n            true\r\n          );\r\n        }\r\n        let state = tn.mark();\r\n        let again = true;\r\n        do {\r\n          switch (tn.next(IdentifierHandling.PREFER)) {\r\n\r\n            // function expression\r\n            case Token.DOT_DOT_DOT: {\r\n              tn.reset(state);\r\n              return this.parseFunctionExpression(tn);\r\n            }\r\n            // can be both\r\n            case Token.IDENTIFIER: {\r\n              tn.readIdentifier();\r\n              switch (tn.next()) {\r\n\r\n                // if we got here, check for arrow\r\n                case Token.CLOSEPAREN: {\r\n                  if (!tn.skip(Token.EQUALS_GREATERTHAN)) {\r\n                    again = false;\r\n                    break;\r\n                  }\r\n                  // fall-through\r\n                }\r\n                // function expression\r\n                case Token.COLON: {    // type annotation\r\n                  tn.reset(state);\r\n                  return this.parseFunctionExpression(tn);\r\n                }\r\n                // can be both\r\n                case Token.QUESTION:   // optional parameter or ternary\r\n                case Token.COMMA: {\r\n                  break; // continue\r\n                }\r\n                // parenthesized expression\r\n                // case Token.EQUALS:  // missing type annotation for simplicity\r\n                default: {\r\n                  again = false;\r\n                  break;\r\n                }\r\n              }\r\n              break;\r\n            }\r\n            // parenthesized expression\r\n            default: {\r\n              again = false;\r\n              break;\r\n            }\r\n          }\r\n        } while (again);\r\n        tn.reset(state);\r\n\r\n        // parse parenthesized\r\n        expr = this.parseExpression(tn);\r\n        if (!expr) return null;\r\n        if (!tn.skip(Token.CLOSEPAREN)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n        return Node.createParenthesizedExpression(expr, tn.range(startPos, tn.pos));\r\n      }\r\n      // ArrayLiteralExpression\r\n      case Token.OPENBRACKET: {\r\n        let elementExpressions = new Array<Expression | null>();\r\n        while (!tn.skip(Token.CLOSEBRACKET)) {\r\n          if (tn.peek() == Token.COMMA) {\r\n            expr = null; // omitted\r\n          } else {\r\n            expr = this.parseExpression(tn, Precedence.COMMA + 1);\r\n            if (!expr) return null;\r\n          }\r\n          elementExpressions.push(expr);\r\n          if (!tn.skip(Token.COMMA)) {\r\n            if (tn.skip(Token.CLOSEBRACKET)) {\r\n              break;\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode._0_expected,\r\n                tn.range(), \"]\"\r\n              );\r\n              return null;\r\n            }\r\n          }\r\n        }\r\n        return Node.createArrayLiteralExpression(elementExpressions, tn.range(startPos, tn.pos));\r\n      }\r\n      // ObjectLiteralExpression\r\n      case Token.OPENBRACE: {\r\n        let startPos = tn.tokenPos;\r\n        let names = new Array<IdentifierExpression>();\r\n        let values = new Array<Expression>();\r\n        let name: IdentifierExpression;\r\n        while (!tn.skip(Token.CLOSEBRACE)) {\r\n          if (!tn.skipIdentifier()) {\r\n            if (!tn.skip(Token.STRINGLITERAL)) {\r\n              this.error(\r\n                DiagnosticCode.Identifier_expected,\r\n                tn.range(),\r\n              );\r\n              return null;\r\n            }\r\n            name = Node.createIdentifierExpression(tn.readString(), tn.range());\r\n            name.set(CommonFlags.QUOTED);\r\n          } else {\r\n            name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n          }\r\n          names.push(name);\r\n          if (tn.skip(Token.COLON)) {\r\n            let value = this.parseExpression(tn, Precedence.COMMA + 1);\r\n            if (!value) return null;\r\n            values.push(value);\r\n          } else if (!name.is(CommonFlags.QUOTED)) {\r\n            values.push(name);\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \":\"\r\n            );\r\n            return null;\r\n          }\r\n          if (!tn.skip(Token.COMMA)) {\r\n            if (tn.skip(Token.CLOSEBRACE)) {\r\n              break;\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode._0_expected,\r\n                tn.range(), \"}\"\r\n              );\r\n              return null;\r\n            }\r\n          }\r\n        }\r\n        return Node.createObjectLiteralExpression(names, values, tn.range(startPos, tn.pos));\r\n      }\r\n      // AssertionExpression (unary prefix)\r\n      case Token.LESSTHAN: {\r\n        let toType = this.parseType(tn);\r\n        if (!toType) return null;\r\n        if (!tn.skip(Token.GREATERTHAN)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \">\"\r\n          );\r\n          return null;\r\n        }\r\n        expr = this.parseExpression(tn, Precedence.CALL);\r\n        if (!expr) return null;\r\n        return Node.createAssertionExpression(\r\n          AssertionKind.PREFIX,\r\n          expr,\r\n          toType,\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n      }\r\n      case Token.IDENTIFIER: {\r\n        return Node.createIdentifierExpression(tn.readIdentifier(), tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.THIS: {\r\n        return Node.createThisExpression(tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.CONSTRUCTOR: {\r\n        return Node.createConstructorExpression(tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.SUPER: {\r\n        return Node.createSuperExpression(tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.STRINGLITERAL: {\r\n        return Node.createStringLiteralExpression(tn.readString(), tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.INTEGERLITERAL: {\r\n        return Node.createIntegerLiteralExpression(tn.readInteger(), tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.FLOATLITERAL: {\r\n        return Node.createFloatLiteralExpression(tn.readFloat(), tn.range(startPos, tn.pos));\r\n      }\r\n      // RegexpLiteralExpression\r\n      // note that this also continues on invalid ones so the surrounding AST remains intact\r\n      case Token.SLASH: {\r\n        let regexpPattern = tn.readRegexpPattern(); // also reports\r\n        if (!tn.skip(Token.SLASH)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"/\"\r\n          );\r\n          return null;\r\n        }\r\n        return Node.createRegexpLiteralExpression(\r\n          regexpPattern,\r\n          tn.readRegexpFlags(), // also reports\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n      }\r\n      case Token.FUNCTION: {\r\n        return this.parseFunctionExpression(tn);\r\n      }\r\n      case Token.CLASS: {\r\n        return this.parseClassExpression(tn);\r\n      }\r\n      default: {\r\n        if (token == Token.ENDOFFILE) {\r\n          this.error(\r\n            DiagnosticCode.Unexpected_end_of_text,\r\n            tn.range(startPos)\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Expression_expected,\r\n            tn.range()\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n    }\r\n  }\r\n\r\n  tryParseTypeArgumentsBeforeArguments(\r\n    tn: Tokenizer\r\n  ): CommonTypeNode[] | null {\r\n\r\n    // at '<': Type (',' Type)* '>' '('\r\n\r\n    var state = tn.mark();\r\n    if (!tn.skip(Token.LESSTHAN)) return null;\r\n    var typeArguments = new Array<CommonTypeNode>();\r\n    do {\r\n      if (tn.peek() === Token.GREATERTHAN) {\r\n        break;\r\n      }\r\n      let type = this.parseType(tn, true, true);\r\n      if (!type) {\r\n        tn.reset(state);\r\n        return null;\r\n      }\r\n      typeArguments.push(type);\r\n    } while (tn.skip(Token.COMMA));\r\n    if (tn.skip(Token.GREATERTHAN) && tn.skip(Token.OPENPAREN)) {\r\n      return typeArguments;\r\n    }\r\n    tn.reset(state);\r\n    return null;\r\n  }\r\n\r\n  parseArguments(\r\n    tn: Tokenizer\r\n  ): Expression[] | null {\r\n\r\n    // at '(': (Expression (',' Expression)*)? ')'\r\n\r\n    var args = new Array<Expression>();\r\n    while (!tn.skip(Token.CLOSEPAREN)) {\r\n      let expr = this.parseExpression(tn, Precedence.COMMA + 1);\r\n      if (!expr) return null;\r\n      args.push(expr);\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.CLOSEPAREN)) {\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n    return args;\r\n  }\r\n\r\n  parseExpression(\r\n    tn: Tokenizer,\r\n    precedence: Precedence = Precedence.COMMA\r\n  ): Expression | null {\r\n    assert(precedence != Precedence.NONE);\r\n\r\n    var expr = this.parseExpressionStart(tn);\r\n    if (!expr) return null;\r\n    var startPos = expr.range.start;\r\n\r\n    // CallExpression?\r\n    if (nodeIsCallable(expr.kind)) {\r\n      let typeArguments: CommonTypeNode[] | null = null;\r\n      while (\r\n        tn.skip(Token.OPENPAREN)\r\n        ||\r\n        nodeIsGenericCallable(expr.kind) && (typeArguments = this.tryParseTypeArgumentsBeforeArguments(tn)) !== null\r\n      ) {\r\n        let args = this.parseArguments(tn);\r\n        if (!args) return null;\r\n        expr = Node.createCallExpression(expr, typeArguments, args, tn.range(startPos, tn.pos)); // is again callable\r\n      }\r\n    }\r\n\r\n    var token: Token;\r\n    var next: Expression | null = null;\r\n    var nextPrecedence: Precedence;\r\n    while (\r\n      (nextPrecedence = determinePrecedence(token = tn.peek())) >= precedence\r\n    ) { // precedence climbing\r\n      tn.next();\r\n      switch (token) {\r\n        // AssertionExpression\r\n        case Token.AS: {\r\n          let toType = this.parseType(tn); // reports\r\n          if (!toType) return null;\r\n          expr = Node.createAssertionExpression(\r\n            AssertionKind.AS,\r\n            expr,\r\n            toType,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // InstanceOfExpression\r\n        case Token.INSTANCEOF: {\r\n          let isType = this.parseType(tn); // reports\r\n          if (!isType) return null;\r\n          expr = Node.createInstanceOfExpression(\r\n            expr,\r\n            isType,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // ElementAccessExpression\r\n        case Token.OPENBRACKET: {\r\n          next = this.parseExpression(tn); // reports\r\n          if (!next) return null;\r\n          if (!tn.skip(Token.CLOSEBRACKET)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"]\"\r\n            );\r\n            return null;\r\n          }\r\n          expr = Node.createElementAccessExpression(\r\n            expr,\r\n            next,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // UnaryPostfixExpression\r\n        case Token.PLUS_PLUS:\r\n        case Token.MINUS_MINUS: {\r\n          if (\r\n            expr.kind != NodeKind.IDENTIFIER &&\r\n            expr.kind != NodeKind.ELEMENTACCESS &&\r\n            expr.kind != NodeKind.PROPERTYACCESS\r\n          ) {\r\n            this.error(\r\n              DiagnosticCode.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access,\r\n              expr.range\r\n            );\r\n          }\r\n          expr = Node.createUnaryPostfixExpression(\r\n            token,\r\n            expr,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // TernaryExpression\r\n        case Token.QUESTION: {\r\n          let ifThen = this.parseExpression(tn);\r\n          if (!ifThen) return null;\r\n          if (!tn.skip(Token.COLON)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \":\"\r\n            );\r\n            return null;\r\n          }\r\n          let ifElse = this.parseExpression(tn, precedence > Precedence.COMMA\r\n            ? Precedence.COMMA + 1\r\n            : Precedence.COMMA\r\n          );\r\n          if (!ifElse) return null;\r\n          expr = Node.createTernaryExpression(\r\n            expr,\r\n            ifThen,\r\n            ifElse,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // CommaExpression\r\n        case Token.COMMA: {\r\n          let commaExprs: Expression[] = [ expr ];\r\n          do {\r\n            expr = this.parseExpression(tn, Precedence.COMMA + 1);\r\n            if (!expr) return null;\r\n            commaExprs.push(expr);\r\n          } while (tn.skip(Token.COMMA));\r\n          expr = Node.createCommaExpression(commaExprs, tn.range(startPos, tn.pos));\r\n          break;\r\n        }\r\n        default: {\r\n          next = this.parseExpression(tn,\r\n            isRightAssociative(token)\r\n              ? nextPrecedence\r\n              : nextPrecedence + 1\r\n          );\r\n          if (!next) return null;\r\n\r\n          // PropertyAccessExpression\r\n          if (token == Token.DOT) {\r\n            if (next.kind == NodeKind.IDENTIFIER) {\r\n              expr = Node.createPropertyAccessExpression(\r\n                expr,\r\n                <IdentifierExpression>next,\r\n                tn.range(startPos, tn.pos)\r\n              );\r\n            } else if (next.kind == NodeKind.CALL) { // join\r\n              let propertyCall = <CallExpression>next;\r\n              if (propertyCall.expression.kind == NodeKind.IDENTIFIER) {\r\n                propertyCall.expression = Node.createPropertyAccessExpression(\r\n                  expr,\r\n                  <IdentifierExpression>propertyCall.expression,\r\n                  tn.range(startPos, tn.pos)\r\n                );\r\n              } else {\r\n                this.error(\r\n                  DiagnosticCode.Identifier_expected,\r\n                  propertyCall.expression.range\r\n                );\r\n                return null;\r\n              }\r\n              expr = propertyCall;\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode.Identifier_expected,\r\n                next.range\r\n              );\r\n              return null;\r\n            }\r\n\r\n          // BinaryExpression\r\n          } else {\r\n            expr = Node.createBinaryExpression(token, expr, next, tn.range(startPos, tn.pos));\r\n          }\r\n          break;\r\n        }\r\n      }\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  /** Skips over a statement on errors in an attempt to reduce unnecessary diagnostic noise. */\r\n  skipStatement(tn: Tokenizer): void {\r\n    tn.peek(true);\r\n    if (tn.nextTokenOnNewLine) tn.next(); // if reset() to the previous line\r\n    do {\r\n      let nextToken = tn.peek(true);\r\n      if (\r\n        nextToken == Token.ENDOFFILE ||   // next step should handle this\r\n        nextToken == Token.SEMICOLON      // end of the statement for sure\r\n      ) {\r\n        tn.next();\r\n        break;\r\n      }\r\n      if (tn.nextTokenOnNewLine) break;   // end of the statement maybe\r\n      switch (tn.next()) {\r\n        case Token.IDENTIFIER: {\r\n          tn.readIdentifier();\r\n          break;\r\n        }\r\n        case Token.STRINGLITERAL: {\r\n          tn.readString();\r\n          break;\r\n        }\r\n        case Token.INTEGERLITERAL: {\r\n          tn.readInteger();\r\n          break;\r\n        }\r\n        case Token.FLOATLITERAL: {\r\n          tn.readFloat();\r\n          break;\r\n        }\r\n      }\r\n    } while (true);\r\n  }\r\n\r\n  /** Skips over a block on errors in an attempt to reduce unnecessary diagnostic noise. */\r\n  skipBlock(tn: Tokenizer): void {\r\n    // at '{': ... '}'\r\n    var depth = 1;\r\n    var again = true;\r\n    do {\r\n      switch (tn.next()) {\r\n        case Token.ENDOFFILE: {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"}\"\r\n          );\r\n          again = false;\r\n          break;\r\n        }\r\n        case Token.OPENBRACE: {\r\n          ++depth;\r\n          break;\r\n        }\r\n        case Token.CLOSEBRACE: {\r\n          --depth;\r\n          if (!depth) again = false;\r\n          break;\r\n        }\r\n        case Token.IDENTIFIER: {\r\n          tn.readIdentifier();\r\n          break;\r\n        }\r\n        case Token.STRINGLITERAL: {\r\n          tn.readString();\r\n          break;\r\n        }\r\n        case Token.INTEGERLITERAL: {\r\n          tn.readInteger();\r\n          break;\r\n        }\r\n        case Token.FLOATLITERAL: {\r\n          tn.readFloat();\r\n          break;\r\n        }\r\n      }\r\n    } while (again);\r\n  }\r\n}\r\n\r\n/** Operator precedence from least to largest. */\r\nexport const enum Precedence {\r\n  NONE,\r\n  COMMA,\r\n  SPREAD,\r\n  YIELD,\r\n  ASSIGNMENT,\r\n  CONDITIONAL,\r\n  LOGICAL_OR,\r\n  LOGICAL_AND,\r\n  BITWISE_OR,\r\n  BITWISE_XOR,\r\n  BITWISE_AND,\r\n  EQUALITY,\r\n  RELATIONAL,\r\n  SHIFT,\r\n  ADDITIVE,\r\n  MULTIPLICATIVE,\r\n  EXPONENTIATED,\r\n  UNARY_PREFIX,\r\n  UNARY_POSTFIX,\r\n  CALL,\r\n  MEMBERACCESS,\r\n  GROUPING\r\n}\r\n\r\n/** Determines the precedence of a starting token. */\r\nfunction determinePrecedenceStart(kind: Token): Precedence {\r\n  switch (kind) {\r\n    case Token.DOT_DOT_DOT: return Precedence.SPREAD;\r\n    case Token.YIELD: return Precedence.YIELD;\r\n    case Token.EXCLAMATION:\r\n    case Token.TILDE:\r\n    case Token.PLUS:\r\n    case Token.MINUS:\r\n    case Token.PLUS_PLUS:\r\n    case Token.MINUS_MINUS:\r\n    case Token.TYPEOF:\r\n    case Token.VOID:\r\n    case Token.DELETE: return Precedence.UNARY_PREFIX;\r\n    case Token.NEW: return Precedence.MEMBERACCESS;\r\n  }\r\n  return Precedence.NONE;\r\n}\r\n\r\n/** Determines the precende of a non-starting token. */\r\nfunction determinePrecedence(kind: Token): Precedence {\r\n  switch (kind) {\r\n    case Token.COMMA: return Precedence.COMMA;\r\n    case Token.EQUALS:\r\n    case Token.PLUS_EQUALS:\r\n    case Token.MINUS_EQUALS:\r\n    case Token.ASTERISK_ASTERISK_EQUALS:\r\n    case Token.ASTERISK_EQUALS:\r\n    case Token.SLASH_EQUALS:\r\n    case Token.PERCENT_EQUALS:\r\n    case Token.LESSTHAN_LESSTHAN_EQUALS:\r\n    case Token.GREATERTHAN_GREATERTHAN_EQUALS:\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:\r\n    case Token.AMPERSAND_EQUALS:\r\n    case Token.CARET_EQUALS:\r\n    case Token.BAR_EQUALS: return Precedence.ASSIGNMENT;\r\n    case Token.QUESTION: return Precedence.CONDITIONAL;\r\n    case Token.BAR_BAR: return Precedence.LOGICAL_OR;\r\n    case Token.AMPERSAND_AMPERSAND: return Precedence.LOGICAL_AND;\r\n    case Token.BAR: return Precedence.BITWISE_OR;\r\n    case Token.CARET: return Precedence.BITWISE_XOR;\r\n    case Token.AMPERSAND: return Precedence.BITWISE_AND;\r\n    case Token.EQUALS_EQUALS:\r\n    case Token.EXCLAMATION_EQUALS:\r\n    case Token.EQUALS_EQUALS_EQUALS:\r\n    case Token.EXCLAMATION_EQUALS_EQUALS: return Precedence.EQUALITY;\r\n    case Token.AS:\r\n    case Token.IN:\r\n    case Token.INSTANCEOF:\r\n    case Token.LESSTHAN:\r\n    case Token.GREATERTHAN:\r\n    case Token.LESSTHAN_EQUALS:\r\n    case Token.GREATERTHAN_EQUALS: return Precedence.RELATIONAL;\r\n    case Token.LESSTHAN_LESSTHAN:\r\n    case Token.GREATERTHAN_GREATERTHAN:\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN: return Precedence.SHIFT;\r\n    case Token.PLUS:\r\n    case Token.MINUS: return Precedence.ADDITIVE;\r\n    case Token.ASTERISK:\r\n    case Token.SLASH:\r\n    case Token.PERCENT: return Precedence.MULTIPLICATIVE;\r\n    case Token.ASTERISK_ASTERISK: return Precedence.EXPONENTIATED;\r\n    case Token.PLUS_PLUS:\r\n    case Token.MINUS_MINUS: return Precedence.UNARY_POSTFIX;\r\n    case Token.DOT:\r\n    case Token.NEW:\r\n    case Token.OPENBRACKET: return Precedence.MEMBERACCESS;\r\n  }\r\n  return Precedence.NONE;\r\n}\r\n\r\n/** Determines whether a non-starting token is right associative. */\r\nfunction isRightAssociative(kind: Token): bool {\r\n  switch (kind) {\r\n    case Token.EQUALS:\r\n    case Token.PLUS_EQUALS:\r\n    case Token.MINUS_EQUALS:\r\n    case Token.ASTERISK_ASTERISK_EQUALS:\r\n    case Token.ASTERISK_EQUALS:\r\n    case Token.SLASH_EQUALS:\r\n    case Token.PERCENT_EQUALS:\r\n    case Token.LESSTHAN_LESSTHAN_EQUALS:\r\n    case Token.GREATERTHAN_GREATERTHAN_EQUALS:\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:\r\n    case Token.AMPERSAND_EQUALS:\r\n    case Token.CARET_EQUALS:\r\n    case Token.BAR_EQUALS:\r\n    case Token.QUESTION:\r\n    case Token.ASTERISK_ASTERISK: return true;\r\n    default: return false;\r\n  }\r\n}\r\n"],"sourceRoot":""}
\ No newline at end of file
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 /** Has a `let` modifier. */\r\n  LET = 1 << 4,\r\n  /** Has a `static` modifier. */\r\n  STATIC = 1 << 5,\r\n  /** Has a `readonly` modifier. */\r\n  READONLY = 1 << 6,\r\n  /** Has an `abstract` modifier. */\r\n  ABSTRACT = 1 << 7,\r\n  /** Has a `public` modifier. */\r\n  PUBLIC = 1 << 8,\r\n  /** Has a `private` modifier. */\r\n  PRIVATE = 1 << 9,\r\n  /** Has a `protected` modifier. */\r\n  PROTECTED = 1 << 10,\r\n  /** Has a `get` modifier. */\r\n  GET = 1 << 11,\r\n  /** Has a `set` modifier. */\r\n  SET = 1 << 12,\r\n\r\n  // Extended modifiers usually derived from basic modifiers\r\n\r\n  /** Is ambient, that is either declared or nested in a declared element. */\r\n  AMBIENT = 1 << 13,\r\n  /** Is generic. */\r\n  GENERIC = 1 << 14,\r\n  /** Is part of a generic context. */\r\n  GENERIC_CONTEXT = 1 << 15,\r\n  /** Is an instance member. */\r\n  INSTANCE = 1 << 16,\r\n  /** Is a constructor. */\r\n  CONSTRUCTOR = 1 << 17,\r\n  /** Is an arrow function. */\r\n  ARROW = 1 << 18,\r\n  /** Is a module export. */\r\n  MODULE_EXPORT = 1 << 19,\r\n  /** Is a module import. */\r\n  MODULE_IMPORT = 1 << 20,\r\n\r\n  // Compilation states\r\n\r\n  /** Is compiled. */\r\n  COMPILED = 1 << 21,\r\n  /** Has a constant value and is therefore inlined. */\r\n  INLINED = 1 << 22,\r\n  /** Is scoped. */\r\n  SCOPED = 1 << 23,\r\n  /** Is a trampoline. */\r\n  TRAMPOLINE = 1 << 24,\r\n  /** Is a virtual method. */\r\n  VIRTUAL = 1 << 25,\r\n  /** Is the main function. */\r\n  MAIN = 1 << 26,\r\n\r\n  // Other\r\n\r\n  QUOTED = 1 << 27\r\n}\r\n\r\n/** Path delimiter inserted between file system levels. */\r\nexport const PATH_DELIMITER = \"/\";\r\n/** Substitution used to indicate the parent directory. */\r\nexport const PARENT_SUBST = \"..\";\r\n/** Function name prefix used for getters. */\r\nexport const GETTER_PREFIX = \"get:\";\r\n/** Function name prefix used for setters. */\r\nexport const SETTER_PREFIX = \"set:\";\r\n/** Delimiter used between class names and instance members. */\r\nexport const INSTANCE_DELIMITER = \"#\";\r\n/** Delimiter used between class and namespace names and static members. */\r\nexport const STATIC_DELIMITER = \".\";\r\n/** Delimiter used between a function and its inner elements. */\r\nexport const INNER_DELIMITER = \"~\";\r\n/** Substitution used to indicate a library directory. */\r\nexport const LIBRARY_SUBST = \"~lib\";\r\n/** Library directory prefix. */\r\nexport const LIBRARY_PREFIX = LIBRARY_SUBST + PATH_DELIMITER;\r\n/** Prefix used to indicate a filespace element. */\r\nexport const FILESPACE_PREFIX = \"file:\";\r\n","/**\r\n * Shared diagnostic handling inherited by the parser and the compiler.\r\n * @module diagnostics\r\n * @preferred\r\n *//***/\r\n\r\nimport {\r\n  Range\r\n} from \"./ast\";\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  diagnosticCodeToString\r\n} from \"./diagnosticMessages.generated\";\r\n\r\nimport {\r\n  isLineBreak\r\n} from \"./util\";\r\n\r\nexport {\r\n  DiagnosticCode,\r\n  diagnosticCodeToString\r\n} from \"./diagnosticMessages.generated\";\r\n\r\n/** Indicates the category of a {@link DiagnosticMessage}. */\r\nexport enum DiagnosticCategory {\r\n  /** Informatory message. */\r\n  INFO,\r\n  /** Warning message. */\r\n  WARNING,\r\n  /** Error message. */\r\n  ERROR\r\n}\r\n\r\n/** Returns the string representation of the specified diagnostic category. */\r\nexport function diagnosticCategoryToString(category: DiagnosticCategory): string {\r\n  switch (category) {\r\n    case DiagnosticCategory.INFO: return \"INFO\";\r\n    case DiagnosticCategory.WARNING: return \"WARNING\";\r\n    case DiagnosticCategory.ERROR: return \"ERROR\";\r\n    default: {\r\n      assert(false);\r\n      return \"\";\r\n    }\r\n  }\r\n}\r\n\r\n/** ANSI escape sequence for blue foreground. */\r\nexport const COLOR_BLUE: string = \"\\u001b[96m\";\r\n/** ANSI escape sequence for yellow foreground. */\r\nexport const COLOR_YELLOW: string = \"\\u001b[93m\";\r\n/** ANSI escape sequence for red foreground. */\r\nexport const COLOR_RED: string = \"\\u001b[91m\";\r\n/** ANSI escape sequence to reset the foreground color. */\r\nexport const COLOR_RESET: string = \"\\u001b[0m\";\r\n\r\n/** Returns the ANSI escape sequence for the specified category. */\r\nexport function diagnosticCategoryToColor(category: DiagnosticCategory): string {\r\n  switch (category) {\r\n    case DiagnosticCategory.INFO: return COLOR_BLUE;\r\n    case DiagnosticCategory.WARNING: return COLOR_YELLOW;\r\n    case DiagnosticCategory.ERROR: return COLOR_RED;\r\n    default: {\r\n      assert(false);\r\n      return \"\";\r\n    }\r\n  }\r\n}\r\n\r\n/** Represents a diagnostic message. */\r\nexport class DiagnosticMessage {\r\n\r\n  /** Message code. */\r\n  code: i32;\r\n  /** Message category. */\r\n  category: DiagnosticCategory;\r\n  /** Message text. */\r\n  message: string;\r\n  /** Respective source range, if any. */\r\n  range: Range | null = null;\r\n\r\n  /** Constructs a new diagnostic message. */\r\n  private constructor(code: i32, category: DiagnosticCategory, message: string) {\r\n    this.code = code;\r\n    this.category = category;\r\n    this.message = message;\r\n  }\r\n\r\n  /** Creates a new diagnostic message of the specified category. */\r\n  static create(\r\n    code: DiagnosticCode,\r\n    category: DiagnosticCategory,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): DiagnosticMessage {\r\n    var message = diagnosticCodeToString(code);\r\n    if (arg0 != null) message = message.replace(\"{0}\", arg0);\r\n    if (arg1 != null) message = message.replace(\"{1}\", arg1);\r\n    if (arg2 != null) message = message.replace(\"{2}\", arg2);\r\n    return new DiagnosticMessage(code, category, message);\r\n  }\r\n\r\n  /** Creates a new informatory diagnostic message. */\r\n  static createInfo(\r\n    code: DiagnosticCode,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null\r\n  ): DiagnosticMessage {\r\n    return DiagnosticMessage.create(code, DiagnosticCategory.INFO, arg0, arg1);\r\n  }\r\n\r\n  /** Creates a new warning diagnostic message. */\r\n  static createWarning(\r\n    code: DiagnosticCode,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null\r\n  ): DiagnosticMessage {\r\n    return DiagnosticMessage.create(code, DiagnosticCategory.WARNING, arg0, arg1);\r\n  }\r\n\r\n  /** Creates a new error diagnostic message. */\r\n  static createError(\r\n    code: DiagnosticCode,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null\r\n  ): DiagnosticMessage {\r\n    return DiagnosticMessage.create(code, DiagnosticCategory.ERROR, arg0, arg1);\r\n  }\r\n\r\n  /** Adds a source range to this message. */\r\n  withRange(range: Range): this {\r\n    this.range = range;\r\n    return this;\r\n  }\r\n\r\n  /** Converts this message to a string. */\r\n  toString(): string {\r\n    if (this.range) {\r\n      return (\r\n        diagnosticCategoryToString(this.category) +\r\n        \" \" +\r\n        this.code.toString(10) +\r\n        \": \\\"\" +\r\n        this.message +\r\n        \"\\\" in \" +\r\n        this.range.source.normalizedPath +\r\n        \":\" +\r\n        this.range.line.toString(10) +\r\n        \":\" +\r\n        this.range.column.toString(10)\r\n      );\r\n    }\r\n    return (\r\n      diagnosticCategoryToString(this.category) +\r\n      \" \" +\r\n      this.code.toString(10) +\r\n      \": \" +\r\n      this.message\r\n    );\r\n  }\r\n}\r\n\r\n/** Formats a diagnostic message, optionally with terminal colors and source context. */\r\nexport function formatDiagnosticMessage(\r\n  message: DiagnosticMessage,\r\n  useColors: bool = false,\r\n  showContext: bool = false\r\n): string {\r\n\r\n  // general information\r\n  var sb: string[] = [];\r\n  if (useColors) sb.push(diagnosticCategoryToColor(message.category));\r\n  sb.push(diagnosticCategoryToString(message.category));\r\n  if (useColors) sb.push(COLOR_RESET);\r\n  sb.push(message.code < 1000 ? \" AS\" : \" TS\");\r\n  sb.push(message.code.toString(10));\r\n  sb.push(\": \");\r\n  sb.push(message.message);\r\n\r\n  // include range information if available\r\n  if (message.range) {\r\n\r\n    // include context information if requested\r\n    let range = message.range;\r\n    if (showContext) {\r\n      sb.push(\"\\n\");\r\n      sb.push(formatDiagnosticContext(message.range, useColors));\r\n    }\r\n\r\n    sb.push(\"\\n\");\r\n    sb.push(\" in \");\r\n    sb.push(range.source.normalizedPath);\r\n    sb.push(\"(\");\r\n    sb.push(range.line.toString(10));\r\n    sb.push(\",\");\r\n    sb.push(range.column.toString(10));\r\n    sb.push(\")\");\r\n  }\r\n  return sb.join(\"\");\r\n}\r\n\r\n/** Formats the diagnostic context for the specified range, optionally with terminal colors. */\r\nexport function formatDiagnosticContext(range: Range, useColors: bool = false): string {\r\n  var text = range.source.text;\r\n  var len = text.length;\r\n  var start = range.start;\r\n  var end = range.end;\r\n  while (start > 0 && !isLineBreak(text.charCodeAt(start - 1))) start--;\r\n  while (end < len && !isLineBreak(text.charCodeAt(end))) end++;\r\n  var sb: string[] = [\r\n    \"\\n \",\r\n    text.substring(start, end),\r\n    \"\\n \"\r\n  ];\r\n  while (start < range.start) {\r\n    sb.push(\" \");\r\n    start++;\r\n  }\r\n  if (useColors) sb.push(COLOR_RED);\r\n  if (range.start == range.end) {\r\n    sb.push(\"^\");\r\n  } else {\r\n    while (start++ < range.end) sb.push(\"~\");\r\n  }\r\n  if (useColors) sb.push(COLOR_RESET);\r\n  return sb.join(\"\");\r\n}\r\n\r\n/** Base class of all diagnostic emitters. */\r\nexport abstract class DiagnosticEmitter {\r\n\r\n  /** Diagnostic messages emitted so far. */\r\n  diagnostics: DiagnosticMessage[];\r\n\r\n  /** Initializes this diagnostic emitter. */\r\n  protected constructor(diagnostics: DiagnosticMessage[] | null = null) {\r\n    this.diagnostics = diagnostics ? <DiagnosticMessage[]>diagnostics : new Array();\r\n  }\r\n\r\n  /** Emits a diagnostic message of the specified category. */\r\n  emitDiagnostic(\r\n    code: DiagnosticCode,\r\n    category: DiagnosticCategory,\r\n    range: Range,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): void {\r\n    var message = DiagnosticMessage.create(code, category, arg0, arg1, arg2).withRange(range);\r\n    this.diagnostics.push(message);\r\n    // console.log(formatDiagnosticMessage(message, true, true) + \"\\n\"); // temporary\r\n    // console.log(<string>new Error(\"stack\").stack);\r\n  }\r\n\r\n  /** Emits an informatory diagnostic message. */\r\n  info(\r\n    code: DiagnosticCode,\r\n    range: Range,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): void {\r\n    this.emitDiagnostic(code, DiagnosticCategory.INFO, range, arg0, arg1, arg2);\r\n  }\r\n\r\n  /** Emits a warning diagnostic message. */\r\n  warning(\r\n    code: DiagnosticCode,\r\n    range: Range,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): void {\r\n    this.emitDiagnostic(code, DiagnosticCategory.WARNING, range, arg0, arg1, arg2);\r\n  }\r\n\r\n  /** Emits an error diagnostic message. */\r\n  error(\r\n    code: DiagnosticCode,\r\n    range: Range,\r\n    arg0: string | null = null,\r\n    arg1: string | null = null,\r\n    arg2: string | null = null\r\n  ): void {\r\n    this.emitDiagnostic(code, DiagnosticCategory.ERROR, range, arg0, arg1, arg2);\r\n  }\r\n}\r\n","/**\r\n * Various compiler utilities.\r\n * @module util\r\n * @preferred\r\n *//***/\r\n\r\nexport * from \"./charcode\";\r\nexport * from \"./path\";\r\nexport * from \"./text\";\r\nexport * from \"./binary\";\r\n","/**\r\n * Abstract syntax tree representing a source file once parsed.\r\n * @module ast\r\n *//***/\r\n\r\nimport {\r\n  CommonFlags,\r\n  PATH_DELIMITER,\r\n  STATIC_DELIMITER,\r\n  INSTANCE_DELIMITER,\r\n  LIBRARY_PREFIX\r\n} from \"./common\";\r\n\r\nimport {\r\n  Token,\r\n  Tokenizer,\r\n  Range\r\n} from \"./tokenizer\";\r\n\r\nimport {\r\n  normalizePath,\r\n  resolvePath,\r\n  CharCode\r\n} from \"./util\";\r\n\r\nexport { Token, Range };\r\n\r\n/** Indicates the kind of a node. */\r\nexport enum NodeKind {\r\n\r\n  SOURCE,\r\n\r\n  // types\r\n  TYPE,\r\n  TYPEPARAMETER,\r\n  PARAMETER,\r\n  SIGNATURE,\r\n\r\n  // expressions\r\n  IDENTIFIER,\r\n  ASSERTION,\r\n  BINARY,\r\n  CALL,\r\n  CLASS,\r\n  COMMA,\r\n  ELEMENTACCESS,\r\n  FALSE,\r\n  FUNCTION,\r\n  INSTANCEOF,\r\n  LITERAL,\r\n  NEW,\r\n  NULL,\r\n  PARENTHESIZED,\r\n  PROPERTYACCESS,\r\n  TERNARY,\r\n  SUPER,\r\n  THIS,\r\n  TRUE,\r\n  CONSTRUCTOR,\r\n  UNARYPOSTFIX,\r\n  UNARYPREFIX,\r\n\r\n  // statements\r\n  BLOCK,\r\n  BREAK,\r\n  CONTINUE,\r\n  DO,\r\n  EMPTY,\r\n  EXPORT,\r\n  EXPORTIMPORT,\r\n  EXPRESSION,\r\n  FOR,\r\n  IF,\r\n  IMPORT,\r\n  RETURN,\r\n  SWITCH,\r\n  THROW,\r\n  TRY,\r\n  VARIABLE,\r\n  VOID,\r\n  WHILE,\r\n\r\n  // declaration statements\r\n  CLASSDECLARATION,\r\n  ENUMDECLARATION,\r\n  ENUMVALUEDECLARATION,\r\n  FIELDDECLARATION,\r\n  FUNCTIONDECLARATION,\r\n  IMPORTDECLARATION,\r\n  INTERFACEDECLARATION,\r\n  METHODDECLARATION,\r\n  NAMESPACEDECLARATION,\r\n  TYPEDECLARATION,\r\n  VARIABLEDECLARATION,\r\n\r\n  // special\r\n  DECORATOR,\r\n  EXPORTMEMBER,\r\n  SWITCHCASE,\r\n  COMMENT\r\n}\r\n\r\n/** Checks if a node represents a constant value. */\r\nexport function nodeIsConstantValue(kind: NodeKind): bool {\r\n  switch (kind) {\r\n    case NodeKind.LITERAL:\r\n    case NodeKind.NULL:\r\n    case NodeKind.TRUE:\r\n    case NodeKind.FALSE: return true;\r\n  }\r\n  return false;\r\n}\r\n\r\n/** Checks if a node might be callable. */\r\nexport function nodeIsCallable(kind: NodeKind): bool {\r\n  switch (kind) {\r\n    case NodeKind.IDENTIFIER:\r\n    case NodeKind.CALL:\r\n    case NodeKind.ELEMENTACCESS:\r\n    case NodeKind.PROPERTYACCESS: return true;\r\n  }\r\n  return false;\r\n}\r\n\r\n/** Checks if a node might be callable with generic arguments. */\r\nexport function nodeIsGenericCallable(kind: NodeKind): bool {\r\n  switch (kind) {\r\n    case NodeKind.IDENTIFIER:\r\n    case NodeKind.PROPERTYACCESS: return true;\r\n  }\r\n  return false;\r\n}\r\n\r\n/** Base class of all nodes. */\r\nexport abstract class Node {\r\n\r\n  /** Node kind indicator. */\r\n  kind: NodeKind;\r\n  /** Source range. */\r\n  range: Range;\r\n  /** Parent node. */\r\n  parent: Node | null = null;\r\n  /** Common flags indicating specific traits. */\r\n  flags: CommonFlags = CommonFlags.NONE;\r\n\r\n  /** Tests if this node has the specified flag or flags. */\r\n  is(flag: CommonFlags): bool { return (this.flags & flag) == flag; }\r\n  /** Tests if this node has one of the specified flags. */\r\n  isAny(flag: CommonFlags): bool { return (this.flags & flag) != 0; }\r\n  /** Sets a specific flag or flags. */\r\n  set(flag: CommonFlags): void { this.flags |= flag; }\r\n\r\n  // types\r\n\r\n  static createType(\r\n    name: IdentifierExpression,\r\n    typeArguments: CommonTypeNode[] | null,\r\n    isNullable: bool,\r\n    range: Range\r\n  ): TypeNode {\r\n    var type = new TypeNode();\r\n    type.range = range;\r\n    type.name = name; name.parent = type;\r\n    type.typeArguments = typeArguments; if (typeArguments) setParent(typeArguments, type);\r\n    type.isNullable = isNullable;\r\n    return type;\r\n  }\r\n\r\n  static createOmittedType(\r\n    range: Range\r\n  ): TypeNode {\r\n    return Node.createType(\r\n      Node.createIdentifierExpression(\"\", range),\r\n      null,\r\n      false,\r\n      range\r\n    );\r\n  }\r\n\r\n  static createTypeParameter(\r\n    name: IdentifierExpression,\r\n    extendsType: TypeNode | null,\r\n    range: Range\r\n  ): TypeParameterNode {\r\n    var elem = new TypeParameterNode();\r\n    elem.range = range;\r\n    elem.name = name; name.parent = elem;\r\n    elem.extendsType = extendsType; if (extendsType) extendsType.parent = elem;\r\n    return elem;\r\n  }\r\n\r\n  static createParameter(\r\n    name: IdentifierExpression,\r\n    type: CommonTypeNode,\r\n    initializer: Expression | null,\r\n    kind: ParameterKind,\r\n    range: Range\r\n  ): ParameterNode {\r\n    var elem = new ParameterNode();\r\n    elem.range = range;\r\n    elem.name = name; name.parent = elem;\r\n    elem.type = type; if (type) type.parent = elem;\r\n    elem.initializer = initializer; if (initializer) initializer.parent = elem;\r\n    elem.parameterKind = kind;\r\n    return elem;\r\n  }\r\n\r\n  static createSignature(\r\n    parameters: ParameterNode[],\r\n    returnType: CommonTypeNode,\r\n    explicitThisType: TypeNode | null,\r\n    isNullable: bool,\r\n    range: Range\r\n  ): SignatureNode {\r\n    var sig = new SignatureNode();\r\n    sig.range = range;\r\n    sig.parameters = parameters; setParent(parameters, sig);\r\n    sig.returnType = returnType; returnType.parent = sig;\r\n    sig.explicitThisType = explicitThisType; if (explicitThisType) explicitThisType.parent = sig;\r\n    sig.isNullable = isNullable;\r\n    return sig;\r\n  }\r\n\r\n  // special\r\n\r\n  static createDecorator(\r\n    name: Expression,\r\n    args: Expression[] | null,\r\n    range: Range\r\n  ): DecoratorNode {\r\n    var stmt = new DecoratorNode();\r\n    stmt.range = range;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.arguments = args; if (args) setParent(args, stmt);\r\n    stmt.decoratorKind = decoratorNameToKind(name);\r\n    return stmt;\r\n  }\r\n\r\n  static createComment(\r\n    text: string,\r\n    kind: CommentKind,\r\n    range: Range\r\n  ): CommentNode {\r\n    var node = new CommentNode();\r\n    node.range = range;\r\n    node.commentKind = kind;\r\n    node.text = text;\r\n    return node;\r\n  }\r\n\r\n  // expressions\r\n\r\n  static createIdentifierExpression(\r\n    name: string,\r\n    range: Range\r\n  ): IdentifierExpression {\r\n    var expr = new IdentifierExpression();\r\n    expr.range = range;\r\n    expr.text = name;\r\n    return expr;\r\n  }\r\n\r\n  static createEmptyIdentifierExpression(\r\n    range: Range\r\n  ): IdentifierExpression {\r\n    var expr = new IdentifierExpression();\r\n    expr.range = range;\r\n    expr.text = \"\";\r\n    return expr;\r\n  }\r\n\r\n  static createArrayLiteralExpression(\r\n    elements: (Expression | null)[],\r\n    range: Range\r\n  ): ArrayLiteralExpression {\r\n    var expr = new ArrayLiteralExpression();\r\n    expr.range = range;\r\n    expr.elementExpressions = elements; setParentIfNotNull(elements, expr);\r\n    return expr;\r\n  }\r\n\r\n  static createAssertionExpression(\r\n    assertionKind: AssertionKind,\r\n    expression: Expression,\r\n    toType: CommonTypeNode,\r\n    range: Range\r\n  ): AssertionExpression {\r\n    var expr = new AssertionExpression();\r\n    expr.range = range;\r\n    expr.assertionKind = assertionKind;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.toType = toType; toType.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createBinaryExpression(\r\n    operator: Token,\r\n    left: Expression,\r\n    right: Expression,\r\n    range: Range\r\n  ): BinaryExpression {\r\n    var expr = new BinaryExpression();\r\n    expr.range = range;\r\n    expr.operator = operator;\r\n    expr.left = left; left.parent = expr;\r\n    expr.right = right; right.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createCallExpression(\r\n    expression: Expression,\r\n    typeArgs: CommonTypeNode[] | null,\r\n    args: Expression[],\r\n    range: Range\r\n  ): CallExpression {\r\n    var expr = new CallExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.typeArguments = typeArgs; if (typeArgs) setParent(typeArgs, expr);\r\n    expr.arguments = args; setParent(args, expr);\r\n    return expr;\r\n  }\r\n\r\n  static createClassExpression(\r\n    declaration: ClassDeclaration\r\n  ): ClassExpression {\r\n    var expr = new ClassExpression();\r\n    expr.range = declaration.range;\r\n    expr.declaration = declaration;\r\n    return expr;\r\n  }\r\n\r\n  static createCommaExpression(\r\n    expressions: Expression[],\r\n    range: Range\r\n  ): CommaExpression {\r\n    var expr = new CommaExpression();\r\n    expr.range = range;\r\n    expr.expressions = expressions; setParent(expressions, expr);\r\n    return expr;\r\n  }\r\n\r\n  static createConstructorExpression(\r\n    range: Range\r\n  ): ConstructorExpression {\r\n    var expr = new ConstructorExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createElementAccessExpression(\r\n    expression: Expression,\r\n    element: Expression,\r\n    range: Range\r\n  ): ElementAccessExpression {\r\n    var expr = new ElementAccessExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.elementExpression = element; element.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createFalseExpression(\r\n    range: Range\r\n  ): FalseExpression {\r\n    var expr = new FalseExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createFloatLiteralExpression(\r\n    value: f64,\r\n    range: Range\r\n  ): FloatLiteralExpression {\r\n    var expr = new FloatLiteralExpression();\r\n    expr.range = range;\r\n    expr.value = value;\r\n    return expr;\r\n  }\r\n\r\n  static createFunctionExpression(\r\n    declaration: FunctionDeclaration\r\n  ): FunctionExpression {\r\n    var expr = new FunctionExpression();\r\n    expr.flags = declaration.flags & CommonFlags.ARROW;\r\n    expr.range = declaration.range;\r\n    expr.declaration = declaration;\r\n    return expr;\r\n  }\r\n\r\n  static createInstanceOfExpression(\r\n    expression: Expression,\r\n    isType: CommonTypeNode,\r\n    range: Range\r\n  ): InstanceOfExpression {\r\n    var expr = new InstanceOfExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.isType = isType; isType.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createIntegerLiteralExpression(\r\n    value: I64,\r\n    range: Range\r\n  ): IntegerLiteralExpression {\r\n    var expr = new IntegerLiteralExpression();\r\n    expr.range = range;\r\n    expr.value = value;\r\n    return expr;\r\n  }\r\n\r\n  static createNewExpression(\r\n    expression: Expression,\r\n    typeArgs: CommonTypeNode[] | null,\r\n    args: Expression[],\r\n    range: Range\r\n  ): NewExpression {\r\n    var expr = new NewExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.typeArguments = typeArgs; if (typeArgs) setParent(typeArgs, expr);\r\n    expr.arguments = args; setParent(args, expr);\r\n    return expr;\r\n  }\r\n\r\n  static createNullExpression(\r\n    range: Range\r\n  ): NullExpression {\r\n    var expr = new NullExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createObjectLiteralExpression(\r\n    names: IdentifierExpression[],\r\n    values: Expression[],\r\n    range: Range\r\n  ): ObjectLiteralExpression {\r\n    var expr = new ObjectLiteralExpression();\r\n    expr.range = range;\r\n    expr.names = names;\r\n    expr.values = values;\r\n    return expr;\r\n  }\r\n\r\n  static createParenthesizedExpression(\r\n    expression: Expression,\r\n    range: Range\r\n  ): ParenthesizedExpression {\r\n    var expr = new ParenthesizedExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createPropertyAccessExpression(\r\n    expression: Expression,\r\n    property: IdentifierExpression,\r\n    range: Range\r\n  ): PropertyAccessExpression {\r\n    var expr = new PropertyAccessExpression();\r\n    expr.range = range;\r\n    expr.expression = expression; expression.parent = expr;\r\n    expr.property = property; property.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createRegexpLiteralExpression(\r\n    pattern: string,\r\n    flags: string,\r\n    range: Range\r\n  ): RegexpLiteralExpression {\r\n    var expr = new RegexpLiteralExpression();\r\n    expr.range = range;\r\n    expr.pattern = pattern;\r\n    expr.patternFlags = flags;\r\n    return expr;\r\n  }\r\n\r\n  static createTernaryExpression(\r\n    condition: Expression,\r\n    ifThen: Expression,\r\n    ifElse: Expression,\r\n    range: Range\r\n  ): TernaryExpression {\r\n    var expr = new TernaryExpression();\r\n    expr.range = range;\r\n    expr.condition = condition; condition.parent = expr;\r\n    expr.ifThen = ifThen; ifThen.parent = expr;\r\n    expr.ifElse = ifElse; ifElse.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createStringLiteralExpression(\r\n    value: string,\r\n    range: Range\r\n  ): StringLiteralExpression {\r\n    var expr = new StringLiteralExpression();\r\n    expr.range = range;\r\n    expr.value = value;\r\n    return expr;\r\n  }\r\n\r\n  static createSuperExpression(\r\n    range: Range\r\n  ): SuperExpression {\r\n    var expr = new SuperExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createThisExpression(\r\n    range: Range\r\n  ): ThisExpression {\r\n    var expr = new ThisExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createTrueExpression(\r\n    range: Range\r\n  ): TrueExpression {\r\n    var expr = new TrueExpression();\r\n    expr.range = range;\r\n    return expr;\r\n  }\r\n\r\n  static createUnaryPostfixExpression(\r\n    operator: Token,\r\n    operand: Expression,\r\n    range: Range\r\n  ): UnaryPostfixExpression {\r\n    var expr = new UnaryPostfixExpression();\r\n    expr.range = range;\r\n    expr.operator = operator;\r\n    expr.operand = operand; operand.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  static createUnaryPrefixExpression(\r\n    operator: Token,\r\n    operand: Expression,\r\n    range: Range\r\n  ): UnaryPrefixExpression {\r\n    var expr = new UnaryPrefixExpression();\r\n    expr.range = range;\r\n    expr.operator = operator;\r\n    expr.operand = operand; operand.parent = expr;\r\n    return expr;\r\n  }\r\n\r\n  // statements\r\n\r\n  static createBlockStatement(\r\n    statements: Statement[],\r\n    range: Range\r\n  ): BlockStatement {\r\n    var stmt = new BlockStatement();\r\n    stmt.range = range;\r\n    stmt.statements = statements; setParent(statements, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createBreakStatement(\r\n    label: IdentifierExpression | null,\r\n    range: Range\r\n  ): BreakStatement {\r\n    var stmt = new BreakStatement();\r\n    stmt.range = range;\r\n    stmt.label = label; if (label) label.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createClassDeclaration(\r\n    identifier: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[],\r\n    extendsType: TypeNode | null, // can't be a function\r\n    implementsTypes: TypeNode[] | null, // can't be functions\r\n    members: DeclarationStatement[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): ClassDeclaration {\r\n    var stmt = new ClassDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = identifier; identifier.parent = stmt;\r\n    stmt.typeParameters = typeParameters; setParent(typeParameters, stmt);\r\n    stmt.extendsType = extendsType; if (extendsType) extendsType.parent = stmt;\r\n    stmt.implementsTypes = implementsTypes; if (implementsTypes) setParent(implementsTypes, stmt);\r\n    stmt.members = members; setParent(members, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createContinueStatement(\r\n    label: IdentifierExpression | null,\r\n    range: Range\r\n  ): ContinueStatement {\r\n    var stmt = new ContinueStatement();\r\n    stmt.range = range;\r\n    stmt.label = label; if (label) label.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createDoStatement(\r\n    statement: Statement,\r\n    condition: Expression,\r\n    range: Range\r\n  ): DoStatement {\r\n    var stmt = new DoStatement();\r\n    stmt.range = range;\r\n    stmt.statement = statement; statement.parent = stmt;\r\n    stmt.condition = condition; condition.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createEmptyStatement(\r\n    range: Range\r\n  ): EmptyStatement {\r\n    var stmt = new EmptyStatement();\r\n    stmt.range = range;\r\n    return stmt;\r\n  }\r\n\r\n  static createEnumDeclaration(\r\n    name: IdentifierExpression,\r\n    members: EnumValueDeclaration[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): EnumDeclaration {\r\n    var stmt = new EnumDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.values = members; setParent(members, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createEnumValueDeclaration(\r\n    name: IdentifierExpression,\r\n    value: Expression | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): EnumValueDeclaration {\r\n    var stmt = new EnumValueDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.value = value; if (value) value.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createExportStatement(\r\n    members: ExportMember[] | null,\r\n    path: StringLiteralExpression | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): ExportStatement {\r\n    var stmt = new ExportStatement();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.members = members; if (members) setParent(members, stmt);\r\n    stmt.path = path;\r\n    if (path) {\r\n      let normalizedPath = normalizePath(path.value);\r\n      if (path.value.startsWith(\".\")) { // relative\r\n        stmt.normalizedPath = resolvePath(\r\n          normalizedPath,\r\n          range.source.normalizedPath\r\n        );\r\n      } else { // absolute\r\n        stmt.normalizedPath = normalizedPath;\r\n      }\r\n      stmt.internalPath = mangleInternalPath(stmt.normalizedPath);\r\n    } else {\r\n      stmt.normalizedPath = null;\r\n      stmt.internalPath = null;\r\n    }\r\n    return stmt;\r\n  }\r\n\r\n  static createExportImportStatement(\r\n    name: IdentifierExpression,\r\n    externalName: IdentifierExpression,\r\n    range: Range\r\n  ): ExportImportStatement {\r\n    var stmt = new ExportImportStatement();\r\n    stmt.range = range;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.externalName = externalName; externalName.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createExportMember(\r\n    name: IdentifierExpression,\r\n    externalName: IdentifierExpression | null,\r\n    range: Range\r\n  ): ExportMember {\r\n    var elem = new ExportMember();\r\n    elem.range = range;\r\n    elem.name = name; name.parent = elem;\r\n    if (!externalName) {\r\n      externalName = name;\r\n    } else {\r\n      externalName.parent = elem;\r\n    }\r\n    elem.externalName = externalName;\r\n    return elem;\r\n  }\r\n\r\n  static createExpressionStatement(\r\n    expression: Expression\r\n  ): ExpressionStatement {\r\n    var stmt = new ExpressionStatement();\r\n    stmt.range = expression.range;\r\n    stmt.expression = expression; expression.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createIfStatement(\r\n    condition: Expression,\r\n    ifTrue: Statement,\r\n    ifFalse: Statement | null,\r\n    range: Range\r\n  ): IfStatement {\r\n    var stmt = new IfStatement();\r\n    stmt.range = range;\r\n    stmt.condition = condition; condition.parent = stmt;\r\n    stmt.ifTrue = ifTrue; ifTrue.parent = stmt;\r\n    stmt.ifFalse = ifFalse; if (ifFalse) ifFalse.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createImportStatement(\r\n    decls: ImportDeclaration[] | null,\r\n    path: StringLiteralExpression,\r\n    range: Range\r\n  ): ImportStatement {\r\n    var stmt = new ImportStatement();\r\n    stmt.range = range;\r\n    stmt.declarations = decls; if (decls) setParent(decls, stmt);\r\n    stmt.namespaceName = null;\r\n    stmt.path = path;\r\n    var normalizedPath = normalizePath(path.value);\r\n    if (path.value.startsWith(\".\")) { // relative in project\r\n      stmt.normalizedPath = resolvePath(\r\n        normalizedPath,\r\n        range.source.normalizedPath\r\n      );\r\n    } else { // absolute in library\r\n      if (!normalizedPath.startsWith(LIBRARY_PREFIX)) {\r\n        normalizedPath = LIBRARY_PREFIX + normalizedPath;\r\n      }\r\n      stmt.normalizedPath = normalizedPath;\r\n    }\r\n    stmt.internalPath = mangleInternalPath(stmt.normalizedPath);\r\n    return stmt;\r\n  }\r\n\r\n  static createImportStatementWithWildcard(\r\n    identifier: IdentifierExpression,\r\n    path: StringLiteralExpression,\r\n    range: Range\r\n  ): ImportStatement {\r\n    var stmt = new ImportStatement();\r\n    stmt.range = range;\r\n    stmt.declarations = null;\r\n    stmt.namespaceName = identifier;\r\n    stmt.path = path;\r\n    stmt.normalizedPath = resolvePath(\r\n      normalizePath(path.value),\r\n      range.source.normalizedPath\r\n    );\r\n    stmt.internalPath = mangleInternalPath(stmt.normalizedPath);\r\n    return stmt;\r\n  }\r\n\r\n  static createImportDeclaration(\r\n    externalName: IdentifierExpression,\r\n    name: IdentifierExpression | null,\r\n    range: Range\r\n  ): ImportDeclaration {\r\n    var elem = new ImportDeclaration();\r\n    elem.range = range;\r\n    elem.externalName = externalName; externalName.parent = elem;\r\n    if (!name) {\r\n      name = externalName;\r\n    } else {\r\n      name.parent = elem;\r\n    }\r\n    elem.name = name;\r\n    return elem;\r\n  }\r\n\r\n  static createInterfaceDeclaration(\r\n    name: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[],\r\n    extendsType: TypeNode | null, // can't be a function\r\n    members: DeclarationStatement[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): InterfaceDeclaration {\r\n    var stmt = new InterfaceDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.typeParameters = typeParameters; if (typeParameters) setParent(typeParameters, stmt);\r\n    stmt.extendsType = extendsType; if (extendsType) extendsType.parent = stmt;\r\n    stmt.members = members; setParent(members, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createFieldDeclaration(\r\n    name: IdentifierExpression,\r\n    type: CommonTypeNode | null,\r\n    initializer: Expression | null,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): FieldDeclaration {\r\n    var stmt = new FieldDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.type = type; if (type) type.parent = stmt;\r\n    stmt.initializer = initializer; if (initializer) initializer.parent = stmt;\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createForStatement(\r\n    initializer: Statement | null,\r\n    condition: Expression | null,\r\n    incrementor: Expression | null,\r\n    statement: Statement,\r\n    range: Range\r\n  ): ForStatement {\r\n    var stmt = new ForStatement();\r\n    stmt.range = range;\r\n    stmt.initializer = initializer; if (initializer) initializer.parent = stmt;\r\n    stmt.condition = condition; if (condition) condition.parent = stmt;\r\n    stmt.incrementor = incrementor; if (incrementor) incrementor.parent = stmt;\r\n    stmt.statement = statement; statement.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createFunctionDeclaration(\r\n    name: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[] | null,\r\n    signature: SignatureNode,\r\n    body: Statement | null,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): FunctionDeclaration {\r\n    var stmt = new FunctionDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.typeParameters = typeParameters; if (typeParameters) setParent(typeParameters, stmt);\r\n    stmt.signature = signature; signature.parent = stmt;\r\n    stmt.body = body; if (body) body.parent = stmt;\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createMethodDeclaration(\r\n    name: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[] | null,\r\n    signature: SignatureNode,\r\n    body: Statement | null,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): MethodDeclaration {\r\n    var stmt = new MethodDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.typeParameters = typeParameters; if (typeParameters) setParent(typeParameters, stmt);\r\n    stmt.signature = signature; signature.parent = stmt;\r\n    stmt.body = body; if (body) body.parent = stmt;\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createNamespaceDeclaration(\r\n    name: IdentifierExpression,\r\n    members: Statement[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): NamespaceDeclaration {\r\n    var stmt = new NamespaceDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.members = members; setParent(members, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createReturnStatement(\r\n    value: Expression | null,\r\n    range: Range\r\n  ): ReturnStatement {\r\n    var stmt = new ReturnStatement();\r\n    stmt.range = range;\r\n    stmt.value = value; if (value) value.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createSwitchStatement(\r\n    condition: Expression,\r\n    cases: SwitchCase[],\r\n    range: Range\r\n  ): SwitchStatement {\r\n    var stmt = new SwitchStatement();\r\n    stmt.range = range;\r\n    stmt.condition = condition; condition.parent = stmt;\r\n    stmt.cases = cases; setParent(cases, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createSwitchCase(\r\n    label: Expression | null,\r\n    statements: Statement[],\r\n    range: Range\r\n  ): SwitchCase {\r\n    var elem = new SwitchCase();\r\n    elem.range = range;\r\n    elem.label = label; if (label) label.parent = elem;\r\n    elem.statements = statements; setParent(statements, elem);\r\n    return elem;\r\n  }\r\n\r\n  static createThrowStatement(\r\n    value: Expression,\r\n    range: Range\r\n  ): ThrowStatement {\r\n    var stmt = new ThrowStatement();\r\n    stmt.range = range;\r\n    stmt.value = value; value.parent = stmt;\r\n    return stmt;\r\n  }\r\n\r\n  static createTryStatement(\r\n    statements: Statement[],\r\n    catchVariable: IdentifierExpression | null,\r\n    catchStatements: Statement[] | null,\r\n    finallyStatements: Statement[] | null,\r\n    range: Range\r\n  ): TryStatement {\r\n    var stmt = new TryStatement();\r\n    stmt.range = range;\r\n    stmt.statements = statements; setParent(statements, stmt);\r\n    stmt.catchVariable = catchVariable;\r\n    if (catchVariable) catchVariable.parent = stmt;\r\n    stmt.catchStatements = catchStatements;\r\n    if (catchStatements) setParent(catchStatements, stmt);\r\n    stmt.finallyStatements = finallyStatements;\r\n    if (finallyStatements) setParent(finallyStatements, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createTypeDeclaration(\r\n    name: IdentifierExpression,\r\n    typeParameters: TypeParameterNode[] | null,\r\n    alias: CommonTypeNode,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): TypeDeclaration {\r\n    var stmt = new TypeDeclaration();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.name = name; name.parent = stmt;\r\n    stmt.typeParameters = typeParameters; if (typeParameters) setParent(typeParameters, stmt);\r\n    stmt.type = alias; alias.parent = stmt;\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createVariableStatement(\r\n    declarations: VariableDeclaration[],\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): VariableStatement {\r\n    var stmt = new VariableStatement();\r\n    stmt.range = range;\r\n    stmt.flags = flags;\r\n    stmt.declarations = declarations; setParent(declarations, stmt);\r\n    stmt.decorators = decorators; if (decorators) setParent(decorators, stmt);\r\n    return stmt;\r\n  }\r\n\r\n  static createVariableDeclaration(\r\n    name: IdentifierExpression,\r\n    type: CommonTypeNode | null,\r\n    initializer: Expression | null,\r\n    decorators: DecoratorNode[] | null,\r\n    flags: CommonFlags,\r\n    range: Range\r\n  ): VariableDeclaration {\r\n    var elem = new VariableDeclaration();\r\n    elem.range = range;\r\n    elem.flags = flags;\r\n    elem.name = name; name.parent = elem;\r\n    elem.type = type; if (type) type.parent = elem;\r\n    elem.initializer = initializer; if (initializer) initializer.parent = elem;\r\n    elem.decorators = decorators; // inherited\r\n    return elem;\r\n  }\r\n\r\n  static createVoidStatement(\r\n    expression: Expression,\r\n    range: Range\r\n  ): VoidStatement {\r\n    var stmt = new VoidStatement();\r\n    stmt.range = range;\r\n    stmt.expression = expression;\r\n    return stmt;\r\n  }\r\n\r\n  static createWhileStatement(\r\n    condition: Expression,\r\n    statement: Statement,\r\n    range: Range\r\n  ): WhileStatement {\r\n    var stmt = new WhileStatement();\r\n    stmt.range = range;\r\n    stmt.condition = condition; condition.parent = stmt;\r\n    stmt.statement = statement; statement.parent = stmt;\r\n    return stmt;\r\n  }\r\n}\r\n\r\n// types\r\n\r\nexport abstract class CommonTypeNode extends Node {\r\n  // kind varies\r\n\r\n  /** Whether nullable or not. */\r\n  isNullable: bool;\r\n}\r\n\r\n/** Represents a type annotation. */\r\nexport class TypeNode extends CommonTypeNode {\r\n  kind = NodeKind.TYPE;\r\n\r\n  /** Identifier reference. */\r\n  name: IdentifierExpression;\r\n  /** Type argument references. */\r\n  typeArguments: CommonTypeNode[] | null;\r\n}\r\n\r\n/** Represents a type parameter. */\r\nexport class TypeParameterNode extends Node {\r\n  kind = NodeKind.TYPEPARAMETER;\r\n\r\n  /** Identifier reference. */\r\n  name: IdentifierExpression;\r\n  /** Extended type reference, if any. */\r\n  extendsType: TypeNode | null; // can't be a function\r\n}\r\n\r\n/** Represents the kind of a parameter. */\r\nexport enum ParameterKind {\r\n  /** No specific flags. */\r\n  DEFAULT,\r\n  /** Is an optional parameter. */\r\n  OPTIONAL,\r\n  /** Is a rest parameter. */\r\n  REST\r\n}\r\n\r\n/** Represents a function parameter. */\r\nexport class ParameterNode extends Node {\r\n  kind = NodeKind.PARAMETER;\r\n\r\n  /** Parameter kind. */\r\n  parameterKind: ParameterKind;\r\n  /** Parameter name. */\r\n  name: IdentifierExpression;\r\n  /** Parameter type. */\r\n  type: CommonTypeNode;\r\n  /** Initializer expression, if present. */\r\n  initializer: Expression | null;\r\n  /** Implicit field declaration, if applicable. */\r\n  implicitFieldDeclaration: FieldDeclaration | null = null;\r\n}\r\n\r\n/** Represents a function signature. */\r\nexport class SignatureNode extends CommonTypeNode {\r\n  kind = NodeKind.SIGNATURE;\r\n\r\n  /** Accepted parameters. */\r\n  parameters: ParameterNode[];\r\n  /** Return type. */\r\n  returnType: CommonTypeNode;\r\n  /** Explicitly provided this type, if any. */\r\n  explicitThisType: TypeNode | null; // can't be a function\r\n}\r\n\r\n// special\r\n\r\n/** Built-in decorator kinds. */\r\nexport enum DecoratorKind {\r\n  CUSTOM,\r\n  GLOBAL,\r\n  OPERATOR,\r\n  OPERATOR_BINARY,\r\n  OPERATOR_PREFIX,\r\n  OPERATOR_POSTFIX,\r\n  UNMANAGED,\r\n  SEALED,\r\n  INLINE,\r\n  EXTERNAL,\r\n  BUILTIN\r\n}\r\n\r\n/** Returns the kind of the specified decorator. Defaults to {@link DecoratorKind.CUSTOM}. */\r\nexport function decoratorNameToKind(name: Expression): DecoratorKind {\r\n  // @global, @inline, @operator, @sealed, @unmanaged\r\n  if (name.kind == NodeKind.IDENTIFIER) {\r\n    let nameStr = (<IdentifierExpression>name).text;\r\n    assert(nameStr.length);\r\n    switch (nameStr.charCodeAt(0)) {\r\n      case CharCode.b: {\r\n        if (nameStr == \"builtin\") return DecoratorKind.BUILTIN;\r\n        break;\r\n      }\r\n      case CharCode.e: {\r\n        if (nameStr == \"external\") return DecoratorKind.EXTERNAL;\r\n        break;\r\n      }\r\n      case CharCode.g: {\r\n        if (nameStr == \"global\") return DecoratorKind.GLOBAL;\r\n        break;\r\n      }\r\n      case CharCode.i: {\r\n        if (nameStr == \"inline\") return DecoratorKind.INLINE;\r\n        break;\r\n      }\r\n      case CharCode.o: {\r\n        if (nameStr == \"operator\") return DecoratorKind.OPERATOR;\r\n        break;\r\n      }\r\n      case CharCode.s: {\r\n        if (nameStr == \"sealed\") return DecoratorKind.SEALED;\r\n        break;\r\n      }\r\n      case CharCode.u: {\r\n        if (nameStr == \"unmanaged\") return DecoratorKind.UNMANAGED;\r\n        break;\r\n      }\r\n    }\r\n  } else if (\r\n    name.kind == NodeKind.PROPERTYACCESS &&\r\n    (<PropertyAccessExpression>name).expression.kind == NodeKind.IDENTIFIER\r\n  ) {\r\n    let nameStr = (<IdentifierExpression>(<PropertyAccessExpression>name).expression).text;\r\n    assert(nameStr.length);\r\n    let propStr = (<PropertyAccessExpression>name).property.text;\r\n    assert(propStr.length);\r\n    // @operator.binary, @operator.prefix, @operator.postfix\r\n    if (nameStr == \"operator\") {\r\n      switch (propStr.charCodeAt(0)) {\r\n        case CharCode.b: {\r\n          if (propStr == \"binary\") return DecoratorKind.OPERATOR_BINARY;\r\n          break;\r\n        }\r\n        case CharCode.p: {\r\n          switch (propStr) {\r\n            case \"prefix\": return DecoratorKind.OPERATOR_PREFIX;\r\n            case \"postfix\": return DecoratorKind.OPERATOR_POSTFIX;\r\n          }\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n  return DecoratorKind.CUSTOM;\r\n}\r\n\r\n/** Represents a decorator. */\r\nexport class DecoratorNode extends Node {\r\n  kind = NodeKind.DECORATOR;\r\n\r\n  /** Built-in kind, if applicable. */\r\n  decoratorKind: DecoratorKind;\r\n  /** Name expression. */\r\n  name: Expression;\r\n  /** Argument expressions. */\r\n  arguments: Expression[] | null;\r\n}\r\n\r\n/** Comment kinds. */\r\nexport enum CommentKind {\r\n  /** Line comment. */\r\n  LINE,\r\n  /** Triple-slash comment. */\r\n  TRIPLE,\r\n  /** Block comment. */\r\n  BLOCK\r\n}\r\n\r\n/** Represents a comment. */\r\nexport class CommentNode extends Node {\r\n  kind = NodeKind.COMMENT;\r\n\r\n  /** Comment kind. */\r\n  commentKind: CommentKind;\r\n  /** Comment text. */\r\n  text: string;\r\n}\r\n\r\n// expressions\r\n\r\n/** Base class of all expression nodes. */\r\nexport abstract class Expression extends Node { }\r\n\r\n/** Represents an identifier expression. */\r\nexport class IdentifierExpression extends Expression {\r\n  kind = NodeKind.IDENTIFIER;\r\n\r\n  /** Textual name. */\r\n  text: string;\r\n}\r\n\r\n/** Indicates the kind of a literal. */\r\nexport enum LiteralKind {\r\n  FLOAT,\r\n  INTEGER,\r\n  STRING,\r\n  REGEXP,\r\n  ARRAY,\r\n  OBJECT\r\n}\r\n\r\n/** Base class of all literal expressions. */\r\nexport abstract class LiteralExpression extends Expression {\r\n  kind = NodeKind.LITERAL;\r\n\r\n  /** Specific literal kind. */\r\n  literalKind: LiteralKind;\r\n}\r\n\r\n/** Represents an `[]` literal expression. */\r\nexport class ArrayLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.ARRAY;\r\n\r\n  /** Nested element expressions. */\r\n  elementExpressions: (Expression | null)[];\r\n}\r\n\r\n/** Indicates the kind of an assertion. */\r\nexport enum AssertionKind {\r\n  PREFIX,\r\n  AS\r\n}\r\n\r\n/** Represents an assertion expression. */\r\nexport class AssertionExpression extends Expression {\r\n  kind = NodeKind.ASSERTION;\r\n\r\n  /** Specific kind of this assertion. */\r\n  assertionKind: AssertionKind;\r\n  /** Expression being asserted. */\r\n  expression: Expression;\r\n  /** Target type. */\r\n  toType: CommonTypeNode;\r\n}\r\n\r\n/** Represents a binary expression. */\r\nexport class BinaryExpression extends Expression {\r\n  kind = NodeKind.BINARY;\r\n\r\n  /** Operator token. */\r\n  operator: Token;\r\n  /** Left-hand side expression */\r\n  left: Expression;\r\n  /** Right-hand side expression. */\r\n  right: Expression;\r\n}\r\n\r\n/** Represents a call expression. */\r\nexport class CallExpression extends Expression {\r\n  kind = NodeKind.CALL;\r\n\r\n  /** Called expression. Usually an identifier or property access expression. */\r\n  expression: Expression;\r\n  /** Provided type arguments. */\r\n  typeArguments: CommonTypeNode[] | null;\r\n  /** Provided arguments. */\r\n  arguments: Expression[];\r\n}\r\n\r\n/** Represents a class expression using the 'class' keyword. */\r\nexport class ClassExpression extends Expression {\r\n  kind = NodeKind.CLASS;\r\n\r\n  /** Inline class declaration. */\r\n  declaration: ClassDeclaration;\r\n}\r\n\r\n/** Represents a comma expression composed of multiple expressions. */\r\nexport class CommaExpression extends Expression {\r\n  kind = NodeKind.COMMA;\r\n\r\n  /** Sequential expressions. */\r\n  expressions: Expression[];\r\n}\r\n\r\n/** Represents a `constructor` expression. */\r\nexport class ConstructorExpression extends IdentifierExpression {\r\n  kind = NodeKind.CONSTRUCTOR;\r\n  text = \"constructor\";\r\n}\r\n\r\n/** Represents an element access expression, e.g., array access. */\r\nexport class ElementAccessExpression extends Expression {\r\n  kind = NodeKind.ELEMENTACCESS;\r\n\r\n  /** Expression being accessed. */\r\n  expression: Expression;\r\n  /** Element of the expression being accessed. */\r\n  elementExpression: Expression;\r\n}\r\n\r\n/** Represents a float literal expression. */\r\nexport class FloatLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.FLOAT;\r\n\r\n  /** Float value. */\r\n  value: f64;\r\n}\r\n\r\n/** Represents a function expression using the 'function' keyword. */\r\nexport class FunctionExpression extends Expression {\r\n  kind = NodeKind.FUNCTION;\r\n\r\n  /** Inline function declaration. */\r\n  declaration: FunctionDeclaration;\r\n}\r\n\r\n/** Represents an `instanceof` expression. */\r\nexport class InstanceOfExpression extends Expression {\r\n  kind = NodeKind.INSTANCEOF;\r\n\r\n  /** Expression being asserted. */\r\n  expression: Expression;\r\n  /** Type to test for. */\r\n  isType: CommonTypeNode;\r\n}\r\n\r\n/** Represents an integer literal expression. */\r\nexport class IntegerLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.INTEGER;\r\n\r\n  /** Integer value. */\r\n  value: I64;\r\n}\r\n\r\n/** Represents a `new` expression. Like a call but with its own kind. */\r\nexport class NewExpression extends CallExpression {\r\n  kind = NodeKind.NEW;\r\n}\r\n\r\n/** Represents a `null` expression. */\r\nexport class NullExpression extends IdentifierExpression {\r\n  kind = NodeKind.NULL;\r\n  text = \"null\";\r\n}\r\n\r\n/** Represents an object literal expression. */\r\nexport class ObjectLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.OBJECT;\r\n\r\n  /** Field names. */\r\n  names: IdentifierExpression[];\r\n  /** Field values. */\r\n  values: Expression[];\r\n}\r\n\r\n/** Represents a parenthesized expression. */\r\nexport class ParenthesizedExpression extends Expression {\r\n  kind = NodeKind.PARENTHESIZED;\r\n\r\n  /** Expression in parenthesis. */\r\n  expression: Expression;\r\n}\r\n\r\n/** Represents a property access expression. */\r\nexport class PropertyAccessExpression extends Expression {\r\n  kind = NodeKind.PROPERTYACCESS;\r\n\r\n  /** Expression being accessed. */\r\n  expression: Expression;\r\n  /** Property of the expression being accessed. */\r\n  property: IdentifierExpression;\r\n}\r\n\r\n/** Represents a regular expression literal expression. */\r\nexport class RegexpLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.REGEXP;\r\n\r\n  /** Regular expression pattern. */\r\n  pattern: string;\r\n  /** Regular expression flags. */\r\n  patternFlags: string;\r\n}\r\n\r\n/** Represents a ternary expression, i.e., short if notation. */\r\nexport class TernaryExpression extends Expression {\r\n  kind = NodeKind.TERNARY;\r\n\r\n  /** Condition expression. */\r\n  condition: Expression;\r\n  /** Expression executed when condition is `true`. */\r\n  ifThen: Expression;\r\n  /** Expression executed when condition is `false`. */\r\n  ifElse: Expression;\r\n}\r\n\r\n/** Represents a string literal expression. */\r\nexport class StringLiteralExpression extends LiteralExpression {\r\n  literalKind = LiteralKind.STRING;\r\n\r\n  /** String value without quotes. */\r\n  value: string;\r\n}\r\n\r\n/** Represents a `super` expression. */\r\nexport class SuperExpression extends IdentifierExpression {\r\n  kind = NodeKind.SUPER;\r\n  text = \"super\";\r\n}\r\n\r\n/** Represents a `this` expression. */\r\nexport class ThisExpression extends IdentifierExpression {\r\n  kind = NodeKind.THIS;\r\n  text = \"this\";\r\n}\r\n\r\n/** Represents a `true` expression. */\r\nexport class TrueExpression extends IdentifierExpression {\r\n  kind = NodeKind.TRUE;\r\n  text = \"true\";\r\n}\r\n\r\n/** Represents a `false` expression. */\r\nexport class FalseExpression extends IdentifierExpression {\r\n  kind = NodeKind.FALSE;\r\n  text = \"false\";\r\n}\r\n\r\n/** Base class of all unary expressions. */\r\nexport abstract class UnaryExpression extends Expression {\r\n\r\n  /** Operator token. */\r\n  operator: Token;\r\n  /** Operand expression. */\r\n  operand: Expression;\r\n}\r\n\r\n/** Represents a unary postfix expression, e.g. a postfix increment. */\r\nexport class UnaryPostfixExpression extends UnaryExpression {\r\n  kind = NodeKind.UNARYPOSTFIX;\r\n}\r\n\r\n/** Represents a unary prefix expression, e.g. a negation. */\r\nexport class UnaryPrefixExpression extends UnaryExpression {\r\n  kind = NodeKind.UNARYPREFIX;\r\n}\r\n\r\n// statements\r\n\r\nexport function isLastStatement(statement: Statement): bool {\r\n  var parent = assert(statement.parent);\r\n  if (parent.kind == NodeKind.BLOCK) {\r\n    let statements = (<BlockStatement>parent).statements;\r\n    if (statements[statements.length - 1] === statement) {\r\n      switch (assert(parent.parent).kind) {\r\n        case NodeKind.FUNCTIONDECLARATION:\r\n        case NodeKind.METHODDECLARATION: return true;\r\n      }\r\n    }\r\n  }\r\n  return false;\r\n}\r\n\r\n/** Base class of all statement nodes. */\r\nexport abstract class Statement extends Node { }\r\n\r\n/** Indicates the specific kind of a source. */\r\nexport enum SourceKind {\r\n  /** Default source. Usually imported from an entry file. */\r\n  DEFAULT,\r\n  /** Entry file. */\r\n  ENTRY,\r\n  /** Library file. */\r\n  LIBRARY\r\n}\r\n\r\n/** A top-level source node. */\r\nexport class Source extends Node {\r\n  kind = NodeKind.SOURCE;\r\n  parent = null;\r\n\r\n  /** Source kind. */\r\n  sourceKind: SourceKind;\r\n  /** Normalized path. */\r\n  normalizedPath: string;\r\n  /** Path used internally. */\r\n  internalPath: string;\r\n  /** Simple path (last part without extension). */\r\n  simplePath: string;\r\n  /** Contained statements. */\r\n  statements: Statement[];\r\n  /** Full source text. */\r\n  text: string;\r\n  /** Tokenizer reference. */\r\n  tokenizer: Tokenizer | null = null;\r\n  /** Source map index. */\r\n  debugInfoIndex: i32 = -1;\r\n  /** Re-exported sources. */\r\n  exportPaths: Set<string> | null = null;\r\n\r\n  /** Constructs a new source node. */\r\n  constructor(normalizedPath: string, text: string, kind: SourceKind) {\r\n    super();\r\n    this.sourceKind = kind;\r\n    this.normalizedPath = normalizedPath;\r\n    var internalPath = mangleInternalPath(this.normalizedPath);\r\n    this.internalPath = internalPath;\r\n    var pos = internalPath.lastIndexOf(PATH_DELIMITER);\r\n    this.simplePath = pos >= 0 ? internalPath.substring(pos + 1) : internalPath;\r\n    this.statements = new Array();\r\n    this.range = new Range(this, 0, text.length);\r\n    this.text = text;\r\n  }\r\n\r\n  /** Tests if this source is an entry file. */\r\n  get isEntry(): bool { return this.sourceKind == SourceKind.ENTRY; }\r\n  /** Tests if this source is a stdlib file. */\r\n  get isLibrary(): bool { return this.sourceKind == SourceKind.LIBRARY; }\r\n}\r\n\r\n/** Base class of all declaration statements. */\r\nexport abstract class DeclarationStatement extends Statement {\r\n\r\n  /** Simple name being declared. */\r\n  name: IdentifierExpression;\r\n  /** Array of decorators. */\r\n  decorators: DecoratorNode[] | null = null;\r\n\r\n  protected cachedProgramLevelInternalName: string | null = null;\r\n  protected cachedFileLevelInternalName: string | null = null;\r\n\r\n  /** Gets the mangled program-level internal name of this declaration. */\r\n  get programLevelInternalName(): string {\r\n    if (!this.cachedProgramLevelInternalName) {\r\n      this.cachedProgramLevelInternalName = mangleInternalName(this, true);\r\n    }\r\n    return this.cachedProgramLevelInternalName;\r\n  }\r\n\r\n  /** Gets the mangled file-level internal name of this declaration. */\r\n  get fileLevelInternalName(): string {\r\n    if (!this.cachedFileLevelInternalName) {\r\n      this.cachedFileLevelInternalName = mangleInternalName(this, false);\r\n    }\r\n    return this.cachedFileLevelInternalName;\r\n  }\r\n\r\n  /** Tests if this is a top-level declaration within its source file. */\r\n  get isTopLevel(): bool {\r\n    var parent = this.parent;\r\n    if (!parent) {\r\n      return false;\r\n    }\r\n    if (parent.kind == NodeKind.VARIABLE && !(parent = parent.parent)) {\r\n      return false;\r\n    }\r\n    return parent.kind == NodeKind.SOURCE;\r\n  }\r\n\r\n  /** Tests if this declaration is a top-level export within its source file. */\r\n  get isTopLevelExport(): bool {\r\n    var parent = this.parent;\r\n    if (!parent || (parent.kind == NodeKind.VARIABLE && !(parent = parent.parent))) {\r\n      return false;\r\n    }\r\n    if (parent.kind == NodeKind.NAMESPACEDECLARATION) {\r\n      return this.is(CommonFlags.EXPORT) && (<NamespaceDeclaration>parent).isTopLevelExport;\r\n    }\r\n    if (parent.kind == NodeKind.CLASSDECLARATION) {\r\n      return this.is(CommonFlags.STATIC) && (<ClassDeclaration>parent).isTopLevelExport;\r\n    }\r\n    return parent.kind == NodeKind.SOURCE && this.is(CommonFlags.EXPORT);\r\n  }\r\n\r\n  /** Tests if this declaration needs an explicit export. */\r\n  needsExplicitExport(member: ExportMember): bool {\r\n    // This is necessary because module-level exports are automatically created\r\n    // for top level declarations of all sorts. This function essentially tests\r\n    // that there isn't a otherwise duplicate top-level export already.\r\n    return (\r\n      member.name.text != member.externalName.text || // if aliased\r\n      this.range.source != member.range.source ||     // if a re-export\r\n      !this.isTopLevelExport                          // if not top-level\r\n    );\r\n  }\r\n}\r\n\r\n/** Base class of all variable-like declaration statements. */\r\nexport abstract class VariableLikeDeclarationStatement extends DeclarationStatement {\r\n\r\n  /** Variable type. */\r\n  type: CommonTypeNode | null;\r\n  /** Variable initializer. */\r\n  initializer: Expression | null;\r\n}\r\n\r\n/** Represents a block statement. */\r\nexport class BlockStatement extends Statement {\r\n  kind = NodeKind.BLOCK;\r\n\r\n  /** Contained statements. */\r\n  statements: Statement[];\r\n}\r\n\r\n/** Represents a `break` statement. */\r\nexport class BreakStatement extends Statement {\r\n  kind = NodeKind.BREAK;\r\n\r\n  /** Target label, if applicable. */\r\n  label: IdentifierExpression | null;\r\n}\r\n\r\n/** Represents a `class` declaration. */\r\nexport class ClassDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.CLASSDECLARATION;\r\n\r\n  /** Accepted type parameters. */\r\n  typeParameters: TypeParameterNode[];\r\n  /** Base class type being extended, if any. */\r\n  extendsType: TypeNode | null; // can't be a function\r\n  /** Interface types being implemented, if any. */\r\n  implementsTypes: TypeNode[] | null; // can't be functions\r\n  /** Class member declarations. */\r\n  members: DeclarationStatement[];\r\n\r\n  get isGeneric(): bool {\r\n    var typeParameters = this.typeParameters;\r\n    return typeParameters != null && typeParameters.length > 0;\r\n  }\r\n}\r\n\r\n/** Represents a `continue` statement. */\r\nexport class ContinueStatement extends Statement {\r\n  kind = NodeKind.CONTINUE;\r\n\r\n  /** Target label, if applicable. */\r\n  label: IdentifierExpression | null;\r\n}\r\n\r\n/** Represents a `do` statement. */\r\nexport class DoStatement extends Statement {\r\n  kind = NodeKind.DO;\r\n\r\n  /** Statement being looped over. */\r\n  statement: Statement;\r\n  /** Condition when to repeat. */\r\n  condition: Expression;\r\n}\r\n\r\n/** Represents an empty statement, i.e., a semicolon terminating nothing. */\r\nexport class EmptyStatement extends Statement {\r\n  kind = NodeKind.EMPTY;\r\n}\r\n\r\n/** Represents an `enum` declaration. */\r\nexport class EnumDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.ENUMDECLARATION;\r\n\r\n  /** Enum value declarations. */\r\n  values: EnumValueDeclaration[];\r\n}\r\n\r\n/** Represents a value of an `enum` declaration. */\r\nexport class EnumValueDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.ENUMVALUEDECLARATION;\r\n  // name is inherited\r\n\r\n  /** Value expression. */\r\n  value: Expression | null;\r\n}\r\n\r\n/** Represents an `export import` statement of an interface. */\r\nexport class ExportImportStatement extends Node {\r\n  kind = NodeKind.EXPORTIMPORT;\r\n\r\n  /** Identifier being imported. */\r\n  name: IdentifierExpression;\r\n  /** Identifier being exported. */\r\n  externalName: IdentifierExpression;\r\n}\r\n\r\n/** Represents a member of an `export` statement. */\r\nexport class ExportMember extends Node {\r\n  kind = NodeKind.EXPORTMEMBER;\r\n\r\n  /** Identifier being exported. */\r\n  name: IdentifierExpression;\r\n  /** Identifier seen when imported again. */\r\n  externalName: IdentifierExpression;\r\n}\r\n\r\n/** Represents an `export` statement. */\r\nexport class ExportStatement extends Statement {\r\n  kind = NodeKind.EXPORT;\r\n\r\n  /** Array of members if a set of named exports, or `null` if a filespace export. */\r\n  members: ExportMember[] | null;\r\n  /** Path being exported from, if applicable. */\r\n  path: StringLiteralExpression | null;\r\n  /** Normalized path, if `path` is set. */\r\n  normalizedPath: string | null;\r\n  /** Mangled internal path being referenced, if `path` is set. */\r\n  internalPath: string | null;\r\n}\r\n\r\n/** Represents an expression that is used as a statement. */\r\nexport class ExpressionStatement extends Statement {\r\n  kind = NodeKind.EXPRESSION;\r\n\r\n  /** Expression being used as a statement.*/\r\n  expression: Expression;\r\n}\r\n\r\n/** Represents a field declaration within a `class`. */\r\nexport class FieldDeclaration extends VariableLikeDeclarationStatement {\r\n  kind = NodeKind.FIELDDECLARATION;\r\n\r\n  /** Parameter index within the constructor, if applicable. */\r\n  parameterIndex: i32 = -1;\r\n}\r\n\r\n/** Represents a `for` statement. */\r\nexport class ForStatement extends Statement {\r\n  kind = NodeKind.FOR;\r\n\r\n  /**\r\n   * Initializer statement, if present.\r\n   * Either a {@link VariableStatement} or {@link ExpressionStatement}.\r\n   */\r\n  initializer: Statement | null;\r\n  /** Condition expression, if present. */\r\n  condition: Expression | null;\r\n  /** Incrementor expression, if present. */\r\n  incrementor: Expression | null;\r\n  /** Statement being looped over. */\r\n  statement: Statement;\r\n}\r\n\r\n/** Represents a `function` declaration. */\r\nexport class FunctionDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.FUNCTIONDECLARATION;\r\n\r\n  /** Type parameters, if any. */\r\n  typeParameters: TypeParameterNode[] | null;\r\n  /** Function signature. */\r\n  signature: SignatureNode;\r\n  /** Body statement. Usually a block. */\r\n  body: Statement | null;\r\n\r\n  get isGeneric(): bool {\r\n    var typeParameters = this.typeParameters;\r\n    return typeParameters != null && typeParameters.length > 0;\r\n  }\r\n}\r\n\r\n/** Represents an `if` statement. */\r\nexport class IfStatement extends Statement {\r\n  kind = NodeKind.IF;\r\n\r\n  /** Condition. */\r\n  condition: Expression;\r\n  /** Statement executed when condition is `true`. */\r\n  ifTrue: Statement;\r\n  /** Statement executed when condition is `false`. */\r\n  ifFalse: Statement | null;\r\n}\r\n\r\n/** Represents an `import` declaration part of an {@link ImportStatement}. */\r\nexport class ImportDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.IMPORTDECLARATION;\r\n\r\n  /** Identifier being imported. */\r\n  externalName: IdentifierExpression;\r\n}\r\n\r\n/** Represents an `import` statement. */\r\nexport class ImportStatement extends Statement {\r\n  kind = NodeKind.IMPORT;\r\n\r\n  /** Array of member declarations or `null` if an asterisk import. */\r\n  declarations: ImportDeclaration[] | null;\r\n  /** Name of the local namespace, if an asterisk import. */\r\n  namespaceName: IdentifierExpression | null;\r\n  /** Path being imported from. */\r\n  path: StringLiteralExpression;\r\n  /** Normalized path. */\r\n  normalizedPath: string;\r\n  /** Mangled internal path being referenced. */\r\n  internalPath: string;\r\n}\r\n\r\n/** Represents an `interfarce` declaration. */\r\nexport class InterfaceDeclaration extends ClassDeclaration {\r\n  kind = NodeKind.INTERFACEDECLARATION;\r\n}\r\n\r\n/** Represents a method declaration within a `class`. */\r\nexport class MethodDeclaration extends FunctionDeclaration {\r\n  kind = NodeKind.METHODDECLARATION;\r\n}\r\n\r\n/** Represents a `namespace` declaration. */\r\nexport class NamespaceDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.NAMESPACEDECLARATION;\r\n\r\n  /** Array of namespace members. */\r\n  members: Statement[];\r\n}\r\n\r\n/** Represents a `return` statement. */\r\nexport class ReturnStatement extends Statement {\r\n  kind = NodeKind.RETURN;\r\n\r\n  /** Value expression being returned, if present. */\r\n  value: Expression | null;\r\n}\r\n\r\n/** Represents a single `case` within a `switch` statement. */\r\nexport class SwitchCase extends Node {\r\n  kind = NodeKind.SWITCHCASE;\r\n\r\n  /** Label expression. `null` indicates the default case. */\r\n  label: Expression | null;\r\n  /** Contained statements. */\r\n  statements: Statement[];\r\n}\r\n\r\n/** Represents a `switch` statement. */\r\nexport class SwitchStatement extends Statement {\r\n  kind = NodeKind.SWITCH;\r\n\r\n  /** Condition expression. */\r\n  condition: Expression;\r\n  /** Contained cases. */\r\n  cases: SwitchCase[];\r\n}\r\n\r\n/** Represents a `throw` statement. */\r\nexport class ThrowStatement extends Statement {\r\n  kind = NodeKind.THROW;\r\n\r\n  /** Value expression being thrown. */\r\n  value: Expression;\r\n}\r\n\r\n/** Represents a `try` statement. */\r\nexport class TryStatement extends Statement {\r\n  kind = NodeKind.TRY;\r\n\r\n  /** Contained statements. */\r\n  statements: Statement[];\r\n  /** Exception variable name, if a `catch` clause is present. */\r\n  catchVariable: IdentifierExpression | null;\r\n  /** Statements being executed on catch, if a `catch` clause is present. */\r\n  catchStatements: Statement[] | null;\r\n  /** Statements being executed afterwards, if a `finally` clause is present. */\r\n  finallyStatements: Statement[] | null;\r\n}\r\n\r\n/** Represents a `type` declaration. */\r\nexport class TypeDeclaration extends DeclarationStatement {\r\n  kind = NodeKind.TYPEDECLARATION;\r\n\r\n  /** Type parameters, if any. */\r\n  typeParameters: TypeParameterNode[] | null;\r\n  /** Type being aliased. */\r\n  type: CommonTypeNode;\r\n}\r\n\r\n/** Represents a variable declaration part of a {@link VariableStatement}. */\r\nexport class VariableDeclaration extends VariableLikeDeclarationStatement {\r\n  kind = NodeKind.VARIABLEDECLARATION;\r\n}\r\n\r\n/** Represents a variable statement wrapping {@link VariableDeclaration}s. */\r\nexport class VariableStatement extends Statement {\r\n  kind = NodeKind.VARIABLE;\r\n\r\n  /** Array of decorators. */\r\n  decorators: DecoratorNode[] | null;\r\n  /** Array of member declarations. */\r\n  declarations: VariableDeclaration[];\r\n}\r\n\r\n/** Represents a void statement dropping an expression's value. */\r\nexport class VoidStatement extends Statement {\r\n  kind = NodeKind.VOID;\r\n\r\n  /** Expression being dropped. */\r\n  expression: Expression;\r\n}\r\n\r\n/** Represents a `while` statement. */\r\nexport class WhileStatement extends Statement {\r\n  kind = NodeKind.WHILE;\r\n\r\n  /** Condition expression. */\r\n  condition: Expression;\r\n  /** Statement being looped over. */\r\n  statement: Statement;\r\n}\r\n\r\n/** Finds the first decorator matching the specified kind. */\r\nexport function findDecorator(kind: DecoratorKind, decorators: DecoratorNode[] | null): DecoratorNode | null {\r\n  if (decorators) {\r\n    for (let i = 0, k = decorators.length; i < k; ++i) {\r\n      let decorator = decorators[i];\r\n      if (decorator.decoratorKind == kind) return decorator;\r\n    }\r\n  }\r\n  return null;\r\n}\r\n\r\n/** Mangles a declaration's name to an internal name. */\r\nexport function mangleInternalName(declaration: DeclarationStatement, asGlobal: bool = false): string {\r\n  var name = declaration.name.text;\r\n  var parent = declaration.parent;\r\n  if (!parent) return name;\r\n  if (\r\n    declaration.kind == NodeKind.VARIABLEDECLARATION &&\r\n    parent.kind == NodeKind.VARIABLE\r\n  ) { // skip over\r\n    if (!(parent = parent.parent)) return name;\r\n  }\r\n  if (parent.kind == NodeKind.CLASSDECLARATION) {\r\n    return mangleInternalName(<ClassDeclaration>parent, asGlobal) + (\r\n      declaration.is(CommonFlags.STATIC)\r\n        ? STATIC_DELIMITER\r\n        : INSTANCE_DELIMITER\r\n    ) + name;\r\n  }\r\n  if (\r\n    parent.kind == NodeKind.NAMESPACEDECLARATION ||\r\n    parent.kind == NodeKind.ENUMDECLARATION\r\n  ) {\r\n    return mangleInternalName(<DeclarationStatement>parent, asGlobal) +\r\n           STATIC_DELIMITER + name;\r\n  }\r\n  return asGlobal\r\n    ? name\r\n    : declaration.range.source.internalPath + PATH_DELIMITER + name;\r\n}\r\n\r\n/** Mangles an external to an internal path. */\r\nexport function mangleInternalPath(path: string): string {\r\n  if (path.endsWith(\".ts\")) path = path.substring(0, path.length - 3);\r\n  return path;\r\n}\r\n\r\n// Helpers\r\n\r\n/** Sets the parent node on an array of nodes. */\r\nfunction setParent(nodes: Node[], parent: Node): void {\r\n  for (let i = 0, k = nodes.length; i < k; ++i) {\r\n    nodes[i].parent = parent;\r\n  }\r\n}\r\n\r\n/** Sets the parent node on an array of nullable nodes. */\r\nfunction setParentIfNotNull(nodes: (Node | null)[], parent: Node): void {\r\n  for (let i = 0, k = nodes.length; i < k; ++i) {\r\n    let node = nodes[i];\r\n    if (node) node.parent = parent;\r\n  }\r\n}\r\n","/**\r\n * AssemblyScript's intermediate representation describing a program's elements.\r\n * @module program\r\n *//***/\r\n\r\nimport {\r\n  CommonFlags,\r\n  PATH_DELIMITER,\r\n  STATIC_DELIMITER,\r\n  INSTANCE_DELIMITER,\r\n  LIBRARY_PREFIX,\r\n  GETTER_PREFIX,\r\n  SETTER_PREFIX,\r\n  FILESPACE_PREFIX\r\n} from \"./common\";\r\n\r\nimport {\r\n  Options,\r\n  Feature\r\n} from \"./compiler\";\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  DiagnosticMessage,\r\n  DiagnosticEmitter\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Type,\r\n  TypeKind,\r\n  TypeFlags,\r\n  Signature\r\n} from \"./types\";\r\n\r\nimport {\r\n  Node,\r\n  NodeKind,\r\n  Source,\r\n  Range,\r\n  CommonTypeNode,\r\n  TypeParameterNode,\r\n  DecoratorNode,\r\n  DecoratorKind,\r\n\r\n  Expression,\r\n  IdentifierExpression,\r\n  LiteralExpression,\r\n  LiteralKind,\r\n  StringLiteralExpression,\r\n\r\n  ClassDeclaration,\r\n  DeclarationStatement,\r\n  EnumDeclaration,\r\n  EnumValueDeclaration,\r\n  ExportMember,\r\n  ExportStatement,\r\n  FieldDeclaration,\r\n  FunctionDeclaration,\r\n  ImportDeclaration,\r\n  ImportStatement,\r\n  InterfaceDeclaration,\r\n  MethodDeclaration,\r\n  NamespaceDeclaration,\r\n  TypeDeclaration,\r\n  VariableDeclaration,\r\n  VariableLikeDeclarationStatement,\r\n  VariableStatement,\r\n\r\n  decoratorNameToKind,\r\n  findDecorator\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Module,\r\n  NativeType,\r\n  FunctionRef,\r\n  ExpressionRef,\r\n  ExpressionId,\r\n  BinaryOp,\r\n  UnaryOp,\r\n\r\n  getExpressionId,\r\n  getGetLocalIndex,\r\n  isTeeLocal,\r\n  getSetLocalValue,\r\n  getBinaryOp,\r\n  getConstValueI32,\r\n  getBinaryLeft,\r\n  getBinaryRight,\r\n  getUnaryOp,\r\n  getExpressionType,\r\n  getLoadBytes,\r\n  isLoadSigned,\r\n  getIfTrue,\r\n  getIfFalse,\r\n  getSelectThen,\r\n  getSelectElse,\r\n  getCallTarget,\r\n  getBlockChildCount,\r\n  getBlockChild,\r\n  getBlockName,\r\n  getConstValueF32,\r\n  getConstValueF64,\r\n  getConstValueI64Low\r\n} from \"./module\";\r\n\r\nimport {\r\n  CharCode\r\n} from \"./util\";\r\n\r\nimport {\r\n  Resolver\r\n} from \"./resolver\";\r\n\r\n/** Represents a yet unresolved import. */\r\nclass QueuedImport {\r\n  localName: string;\r\n  externalName: string;\r\n  externalNameAlt: string;\r\n  declaration: ImportDeclaration | null; // not set if a filespace\r\n}\r\n\r\n/** Represents a yet unresolved export. */\r\nclass QueuedExport {\r\n  externalName: string;\r\n  isReExport: bool;\r\n  member: ExportMember;\r\n}\r\n\r\n/** Represents a type alias. */\r\nclass TypeAlias {\r\n  typeParameters: TypeParameterNode[] | null;\r\n  type: CommonTypeNode;\r\n}\r\n\r\n/** Represents a module-level export. */\r\nclass ModuleExport {\r\n  element: Element;\r\n  identifier: IdentifierExpression;\r\n}\r\n\r\n/** Represents the kind of an operator overload. */\r\nexport enum OperatorKind {\r\n  INVALID,\r\n\r\n  // indexed access\r\n  INDEXED_GET,            // a[]\r\n  INDEXED_SET,            // a[]=b\r\n  UNCHECKED_INDEXED_GET,  // unchecked(a[])\r\n  UNCHECKED_INDEXED_SET,  // unchecked(a[]=b)\r\n\r\n  // binary\r\n  ADD,                    // a + b\r\n  SUB,                    // a - b\r\n  MUL,                    // a * b\r\n  DIV,                    // a / b\r\n  REM,                    // a % b\r\n  POW,                    // a ** b\r\n  BITWISE_AND,            // a & b\r\n  BITWISE_OR,             // a | b\r\n  BITWISE_XOR,            // a ^ b\r\n  BITWISE_SHL,            // a << b\r\n  BITWISE_SHR,            // a >> b\r\n  BITWISE_SHR_U,          // a >>> b\r\n  EQ,                     // a == b\r\n  NE,                     // a != b\r\n  GT,                     // a > b\r\n  GE,                     // a >= b\r\n  LT,                     // a < b\r\n  LE,                     // a <= b\r\n\r\n  // unary prefix\r\n  PLUS,                   // +a\r\n  MINUS,                  // -a\r\n  NOT,                    // !a\r\n  BITWISE_NOT,            // ~a\r\n  PREFIX_INC,             // ++a\r\n  PREFIX_DEC,             // --a\r\n\r\n  // unary postfix\r\n  POSTFIX_INC,            // a++\r\n  POSTFIX_DEC             // a--\r\n\r\n  // not overridable:\r\n  // IDENTITY             // a === b\r\n  // LOGICAL_AND          // a && b\r\n  // LOGICAL_OR           // a || b\r\n}\r\n\r\n/** Returns the operator kind represented by the specified decorator and string argument. */\r\nfunction operatorKindFromDecorator(decoratorKind: DecoratorKind, arg: string): OperatorKind {\r\n  assert(arg.length);\r\n  switch (decoratorKind) {\r\n    case DecoratorKind.OPERATOR:\r\n    case DecoratorKind.OPERATOR_BINARY: {\r\n      switch (arg.charCodeAt(0)) {\r\n        case CharCode.OPENBRACKET: {\r\n          if (arg == \"[]\") return OperatorKind.INDEXED_GET;\r\n          if (arg == \"[]=\") return OperatorKind.INDEXED_SET;\r\n          break;\r\n        }\r\n        case CharCode.OPENBRACE: {\r\n          if (arg == \"{}\") return OperatorKind.UNCHECKED_INDEXED_GET;\r\n          if (arg == \"{}=\") return OperatorKind.UNCHECKED_INDEXED_SET;\r\n          break;\r\n        }\r\n        case CharCode.PLUS: {\r\n          if (arg == \"+\") return OperatorKind.ADD;\r\n          break;\r\n        }\r\n        case CharCode.MINUS: {\r\n          if (arg == \"-\") return OperatorKind.SUB;\r\n          break;\r\n        }\r\n        case CharCode.ASTERISK: {\r\n          if (arg == \"*\") return OperatorKind.MUL;\r\n          if (arg == \"**\") return OperatorKind.POW;\r\n          break;\r\n        }\r\n        case CharCode.SLASH: {\r\n          if (arg == \"/\") return OperatorKind.DIV;\r\n          break;\r\n        }\r\n        case CharCode.PERCENT: {\r\n          if (arg == \"%\") return OperatorKind.REM;\r\n          break;\r\n        }\r\n        case CharCode.AMPERSAND: {\r\n          if (arg == \"&\") return OperatorKind.BITWISE_AND;\r\n          break;\r\n        }\r\n        case CharCode.BAR: {\r\n          if (arg == \"|\") return OperatorKind.BITWISE_OR;\r\n          break;\r\n        }\r\n        case CharCode.CARET: {\r\n          if (arg == \"^\") return OperatorKind.BITWISE_XOR;\r\n          break;\r\n        }\r\n        case CharCode.EQUALS: {\r\n          if (arg == \"==\") return OperatorKind.EQ;\r\n          break;\r\n        }\r\n        case CharCode.EXCLAMATION: {\r\n          if (arg == \"!=\") return OperatorKind.NE;\r\n          break;\r\n        }\r\n        case CharCode.GREATERTHAN: {\r\n          if (arg == \">\") return OperatorKind.GT;\r\n          if (arg == \">=\") return OperatorKind.GE;\r\n          if (arg == \">>\") return OperatorKind.BITWISE_SHR;\r\n          if (arg == \">>>\") return OperatorKind.BITWISE_SHR_U;\r\n          break;\r\n        }\r\n        case CharCode.LESSTHAN: {\r\n          if (arg == \"<\") return OperatorKind.LT;\r\n          if (arg == \"<=\") return OperatorKind.LE;\r\n          if (arg == \"<<\") return OperatorKind.BITWISE_SHL;\r\n          break;\r\n        }\r\n      }\r\n      break;\r\n    }\r\n    case DecoratorKind.OPERATOR_PREFIX: {\r\n      switch (arg.charCodeAt(0)) {\r\n        case CharCode.PLUS: {\r\n          if (arg == \"+\") return OperatorKind.PLUS;\r\n          if (arg == \"++\") return OperatorKind.PREFIX_INC;\r\n          break;\r\n        }\r\n        case CharCode.MINUS: {\r\n          if (arg == \"-\") return OperatorKind.MINUS;\r\n          if (arg == \"--\") return OperatorKind.PREFIX_DEC;\r\n          break;\r\n        }\r\n        case CharCode.EXCLAMATION: {\r\n          if (arg == \"!\") return OperatorKind.NOT;\r\n          break;\r\n        }\r\n        case CharCode.TILDE: {\r\n          if (arg == \"~\") return OperatorKind.BITWISE_NOT;\r\n          break;\r\n        }\r\n      }\r\n      break;\r\n    }\r\n    case DecoratorKind.OPERATOR_POSTFIX: {\r\n      switch (arg.charCodeAt(0)) {\r\n        case CharCode.PLUS: {\r\n          if (arg == \"++\") return OperatorKind.POSTFIX_INC;\r\n          break;\r\n        }\r\n        case CharCode.MINUS: {\r\n          if (arg == \"--\") return OperatorKind.POSTFIX_DEC;\r\n          break;\r\n        }\r\n      }\r\n      break;\r\n    }\r\n  }\r\n  return OperatorKind.INVALID;\r\n}\r\n\r\nconst noTypesYet = new Map<string,Type>();\r\n\r\n/** Represents an AssemblyScript program. */\r\nexport class Program extends DiagnosticEmitter {\r\n\r\n  /** Array of source files. */\r\n  sources: Source[];\r\n  /** Resolver instance. */\r\n  resolver: Resolver;\r\n  /** Diagnostic offset used where successively obtaining the next diagnostic. */\r\n  diagnosticsOffset: i32 = 0;\r\n  /** Compiler options. */\r\n  options: Options;\r\n\r\n  /** Elements by internal name. */\r\n  elementsLookup: Map<string,Element> = new Map();\r\n  /** Class and function instances by internal name. */\r\n  instancesLookup: Map<string,Element> = new Map();\r\n  /** Types by internal name. */\r\n  typesLookup: Map<string,Type> = noTypesYet;\r\n  /** Declared type aliases. */\r\n  typeAliases: Map<string,TypeAlias> = new Map();\r\n  /** File-level exports by exported name. */\r\n  fileLevelExports: Map<string,Element> = new Map();\r\n  /** Module-level exports by exported name. */\r\n  moduleLevelExports: Map<string,ModuleExport> = new Map();\r\n\r\n  /** ArrayBuffer instance reference. */\r\n  arrayBufferInstance: Class | null = null;\r\n  /** Array prototype reference. */\r\n  arrayPrototype: ClassPrototype | null = null;\r\n  /** String instance reference. */\r\n  stringInstance: Class | null = null;\r\n  /** Start function reference. */\r\n  startFunction: FunctionPrototype;\r\n  /** Main function reference, if present. */\r\n  mainFunction: FunctionPrototype | null = null;\r\n  /** Abort function reference, if present. */\r\n  abortInstance: Function | null = null;\r\n  /** Memory allocation function. */\r\n  memoryAllocateInstance: Function | null = null;\r\n\r\n  /** Whether a garbage collector is present or not. */\r\n  hasGC: bool = false;\r\n  /** Garbage collector allocation function. */\r\n  gcAllocateInstance: Function | null = null;\r\n  /** Garbage collector link function called when a managed object is referenced from a parent. */\r\n  gcLinkInstance: Function | null = null;\r\n  /** Garbage collector mark function called to on reachable managed objects. */\r\n  gcMarkInstance: Function | null = null;\r\n  /** Size of a managed object header. */\r\n  gcHeaderSize: u32 = 0;\r\n  /** Offset of the GC hook. */\r\n  gcHookOffset: u32 = 0;\r\n\r\n  /** Currently processing filespace. */\r\n  currentFilespace: Filespace;\r\n\r\n  /** Constructs a new program, optionally inheriting parser diagnostics. */\r\n  constructor(diagnostics: DiagnosticMessage[] | null = null) {\r\n    super(diagnostics);\r\n    this.resolver = new Resolver(this);\r\n    this.sources = [];\r\n  }\r\n\r\n  /** Gets a source by its exact path. */\r\n  getSource(normalizedPath: string): Source | null {\r\n    var sources = this.sources;\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      let source = sources[i];\r\n      if (source.normalizedPath == normalizedPath) return source;\r\n    }\r\n    return null;\r\n  }\r\n\r\n  /** Looks up the source for the specified possibly ambiguous path. */\r\n  lookupSourceByPath(normalizedPathWithoutExtension: string): Source | null {\r\n    var tmp: string;\r\n    return (\r\n      this.getSource(normalizedPathWithoutExtension + \".ts\") ||\r\n      this.getSource(normalizedPathWithoutExtension + \"/index.ts\") ||\r\n      this.getSource((tmp = LIBRARY_PREFIX + normalizedPathWithoutExtension) + \".ts\") ||\r\n      this.getSource( tmp                                                    + \"/index.ts\")\r\n    );\r\n  }\r\n\r\n  /** Initializes the program and its elements prior to compilation. */\r\n  initialize(options: Options): void {\r\n    this.options = options;\r\n\r\n    // add built-in types\r\n    this.typesLookup = new Map([\r\n      [\"i8\", Type.i8],\r\n      [\"i16\", Type.i16],\r\n      [\"i32\", Type.i32],\r\n      [\"i64\", Type.i64],\r\n      [\"isize\", options.isizeType],\r\n      [\"u8\", Type.u8],\r\n      [\"u16\", Type.u16],\r\n      [\"u32\", Type.u32],\r\n      [\"u64\", Type.u64],\r\n      [\"usize\", options.usizeType],\r\n      [\"bool\", Type.bool],\r\n      [\"f32\", Type.f32],\r\n      [\"f64\", Type.f64],\r\n      [\"void\", Type.void],\r\n      [\"number\", Type.f64],\r\n      [\"boolean\", Type.bool]\r\n    ]);\r\n\r\n    // add compiler hints\r\n    this.setConstantInteger(\"ASC_TARGET\", Type.i32,\r\n      i64_new(options.isWasm64 ? 2 : 1));\r\n    this.setConstantInteger(\"ASC_NO_TREESHAKING\", Type.bool,\r\n      i64_new(options.noTreeShaking ? 1 : 0, 0));\r\n    this.setConstantInteger(\"ASC_NO_ASSERT\", Type.bool,\r\n      i64_new(options.noAssert ? 1 : 0, 0));\r\n    this.setConstantInteger(\"ASC_MEMORY_BASE\", Type.i32,\r\n      i64_new(options.memoryBase, 0));\r\n    this.setConstantInteger(\"ASC_OPTIMIZE_LEVEL\", Type.i32,\r\n      i64_new(options.optimizeLevelHint, 0));\r\n    this.setConstantInteger(\"ASC_SHRINK_LEVEL\", Type.i32,\r\n      i64_new(options.shrinkLevelHint, 0));\r\n    this.setConstantInteger(\"ASC_FEATURE_MUTABLE_GLOBAL\", Type.bool,\r\n      i64_new(options.hasFeature(Feature.MUTABLE_GLOBAL) ? 1 : 0, 0));\r\n    this.setConstantInteger(\"ASC_FEATURE_SIGN_EXTENSION\", Type.bool,\r\n      i64_new(options.hasFeature(Feature.SIGN_EXTENSION) ? 1 : 0, 0));\r\n\r\n    // remember deferred elements\r\n    var queuedImports = new Array<QueuedImport>();\r\n    var queuedExports = new Map<string,QueuedExport>();\r\n    var queuedExtends = new Array<ClassPrototype>();\r\n    var queuedImplements = new Array<ClassPrototype>();\r\n\r\n    // build initial lookup maps of internal names to declarations\r\n    for (let i = 0, k = this.sources.length; i < k; ++i) {\r\n      let source = this.sources[i];\r\n\r\n      // create one filespace per source\r\n      let filespace = new Filespace(this, source);\r\n      this.elementsLookup.set(filespace.internalName, filespace);\r\n      this.currentFilespace = filespace;\r\n\r\n      // process this source's statements\r\n      let statements = source.statements;\r\n      for (let j = 0, l = statements.length; j < l; ++j) {\r\n        let statement = statements[j];\r\n        switch (statement.kind) {\r\n          case NodeKind.CLASSDECLARATION: {\r\n            this.initializeClass(<ClassDeclaration>statement, queuedExtends, queuedImplements);\r\n            break;\r\n          }\r\n          case NodeKind.ENUMDECLARATION: {\r\n            this.initializeEnum(<EnumDeclaration>statement);\r\n            break;\r\n          }\r\n          case NodeKind.EXPORT: {\r\n            this.initializeExports(<ExportStatement>statement, queuedExports);\r\n            break;\r\n          }\r\n          case NodeKind.FUNCTIONDECLARATION: {\r\n            this.initializeFunction(<FunctionDeclaration>statement);\r\n            break;\r\n          }\r\n          case NodeKind.IMPORT: {\r\n            this.initializeImports(<ImportStatement>statement, queuedExports, queuedImports);\r\n            break;\r\n          }\r\n          case NodeKind.INTERFACEDECLARATION: {\r\n            this.initializeInterface(<InterfaceDeclaration>statement);\r\n            break;\r\n          }\r\n          case NodeKind.NAMESPACEDECLARATION: {\r\n            this.initializeNamespace(<NamespaceDeclaration>statement, queuedExtends, queuedImplements);\r\n            break;\r\n          }\r\n          case NodeKind.TYPEDECLARATION: {\r\n            this.initializeTypeAlias(<TypeDeclaration>statement);\r\n            break;\r\n          }\r\n          case NodeKind.VARIABLE: {\r\n            this.initializeVariables(<VariableStatement>statement);\r\n            break;\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    // queued imports should be resolvable now through traversing exports and queued exports\r\n    for (let i = 0; i < queuedImports.length;) {\r\n      let queuedImport = queuedImports[i];\r\n      let declaration = queuedImport.declaration;\r\n      if (declaration) { // named\r\n        let element = this.tryLocateImport(queuedImport.externalName, queuedExports);\r\n        if (element) {\r\n          this.elementsLookup.set(queuedImport.localName, element);\r\n          queuedImports.splice(i, 1);\r\n        } else {\r\n          if (element = this.tryLocateImport(queuedImport.externalNameAlt, queuedExports)) {\r\n            this.elementsLookup.set(queuedImport.localName, element);\r\n            queuedImports.splice(i, 1);\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Module_0_has_no_exported_member_1,\r\n              declaration.range,\r\n              (<ImportStatement>declaration.parent).path.value,\r\n              declaration.externalName.text\r\n            );\r\n            ++i;\r\n          }\r\n        }\r\n      } else { // filespace\r\n        let element = this.elementsLookup.get(queuedImport.externalName);\r\n        if (element) {\r\n          this.elementsLookup.set(queuedImport.localName, element);\r\n          queuedImports.splice(i, 1);\r\n        } else {\r\n          if (element = this.elementsLookup.get(queuedImport.externalNameAlt)) {\r\n            this.elementsLookup.set(queuedImport.localName, element);\r\n            queuedImports.splice(i, 1);\r\n          } else {\r\n            assert(false); // already reported by the parser not finding the file\r\n            ++i;\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    // queued exports should be resolvable now that imports are finalized\r\n    for (let [exportName, queuedExport] of queuedExports) {\r\n      let currentExport: QueuedExport | null = queuedExport; // nullable below\r\n      let element: Element | null;\r\n      do {\r\n        if (currentExport.isReExport) {\r\n          if (element = this.fileLevelExports.get(currentExport.externalName)) {\r\n            this.setExportAndCheckLibrary(\r\n              exportName,\r\n              element,\r\n              queuedExport.member.externalName\r\n            );\r\n            break;\r\n          }\r\n          currentExport = queuedExports.get(currentExport.externalName);\r\n          if (!currentExport) {\r\n            this.error(\r\n              DiagnosticCode.Module_0_has_no_exported_member_1,\r\n              queuedExport.member.externalName.range,\r\n              (<StringLiteralExpression>(<ExportStatement>queuedExport.member.parent).path).value,\r\n              queuedExport.member.externalName.text\r\n            );\r\n          }\r\n        } else {\r\n          if (\r\n            // normal export\r\n            (element = this.elementsLookup.get(currentExport.externalName)) ||\r\n            // library re-export\r\n            (element = this.elementsLookup.get(currentExport.member.name.text))\r\n          ) {\r\n            this.setExportAndCheckLibrary(\r\n              exportName,\r\n              element,\r\n              queuedExport.member.externalName\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Cannot_find_name_0,\r\n              queuedExport.member.range, queuedExport.member.name.text\r\n            );\r\n          }\r\n          break;\r\n        }\r\n      } while (currentExport);\r\n    }\r\n\r\n    // resolve base prototypes of derived classes\r\n    var resolver = this.resolver;\r\n    for (let i = 0, k = queuedExtends.length; i < k; ++i) {\r\n      let derivedPrototype = queuedExtends[i];\r\n      let derivedDeclaration = derivedPrototype.declaration;\r\n      let derivedType = assert(derivedDeclaration.extendsType);\r\n      let baseElement = resolver.resolveIdentifier(derivedType.name, null); // reports\r\n      if (!baseElement) continue;\r\n      if (baseElement.kind == ElementKind.CLASS_PROTOTYPE) {\r\n        let basePrototype = <ClassPrototype>baseElement;\r\n        derivedPrototype.basePrototype = basePrototype;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.A_class_may_only_extend_another_class,\r\n          derivedType.range\r\n        );\r\n      }\r\n    }\r\n\r\n    // set up global aliases\r\n    {\r\n      let globalAliases = options.globalAliases;\r\n      if (globalAliases) {\r\n        for (let [alias, name] of globalAliases) {\r\n          if (!name.length) continue; // explicitly disabled\r\n          let element = this.elementsLookup.get(name);\r\n          if (element) this.elementsLookup.set(alias, element);\r\n          else throw new Error(\"element not found: \" + name);\r\n        }\r\n      }\r\n    }\r\n\r\n    // register 'ArrayBuffer'\r\n    if (this.elementsLookup.has(\"ArrayBuffer\")) {\r\n      let element = assert(this.elementsLookup.get(\"ArrayBuffer\"));\r\n      assert(element.kind == ElementKind.CLASS_PROTOTYPE);\r\n      this.arrayBufferInstance = resolver.resolveClass(<ClassPrototype>element, null);\r\n    }\r\n\r\n    // register 'Array'\r\n    if (this.elementsLookup.has(\"Array\")) {\r\n      let element = assert(this.elementsLookup.get(\"Array\"));\r\n      assert(element.kind == ElementKind.CLASS_PROTOTYPE);\r\n      this.arrayPrototype = <ClassPrototype>element;\r\n    }\r\n\r\n    // register 'String'\r\n    if (this.elementsLookup.has(\"String\")) {\r\n      let element = assert(this.elementsLookup.get(\"String\"));\r\n      assert(element.kind == ElementKind.CLASS_PROTOTYPE);\r\n      let instance = resolver.resolveClass(<ClassPrototype>element, null);\r\n      if (instance) {\r\n        if (this.typesLookup.has(\"string\")) {\r\n          let declaration = (<ClassPrototype>element).declaration;\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, declaration.programLevelInternalName\r\n          );\r\n        } else {\r\n          this.stringInstance = instance;\r\n          this.typesLookup.set(\"string\", instance.type);\r\n        }\r\n      }\r\n    }\r\n\r\n    // register 'start'\r\n    {\r\n      let element = assert(this.elementsLookup.get(\"start\"));\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      this.startFunction = <FunctionPrototype>element;\r\n    }\r\n\r\n    // register 'main' if present\r\n    if (this.moduleLevelExports.has(\"main\")) {\r\n      let element = (<ModuleExport>this.moduleLevelExports.get(\"main\")).element;\r\n      if (\r\n        element.kind == ElementKind.FUNCTION_PROTOTYPE &&\r\n        !(<FunctionPrototype>element).isAny(CommonFlags.GENERIC | CommonFlags.AMBIENT)\r\n      ) {\r\n        (<FunctionPrototype>element).set(CommonFlags.MAIN);\r\n        this.mainFunction = <FunctionPrototype>element;\r\n      }\r\n    }\r\n\r\n    // register 'abort' if present\r\n    if (this.elementsLookup.has(\"abort\")) {\r\n      let element = <Element>this.elementsLookup.get(\"abort\");\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let instance = this.resolver.resolveFunction(<FunctionPrototype>element, null);\r\n      if (instance) this.abortInstance = instance;\r\n    }\r\n\r\n    // register 'memory.allocate' if present\r\n    if (this.elementsLookup.has(\"memory\")) {\r\n      let element = <Element>this.elementsLookup.get(\"memory\");\r\n      let members = element.members;\r\n      if (members) {\r\n        if (members.has(\"allocate\")) {\r\n          element = assert(members.get(\"allocate\"));\r\n          assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n          let instance = this.resolver.resolveFunction(<FunctionPrototype>element, null);\r\n          if (instance) this.memoryAllocateInstance = instance;\r\n        }\r\n      }\r\n    }\r\n\r\n    // register GC hooks if present\r\n    if (\r\n      this.elementsLookup.has(\"__gc_allocate\") &&\r\n      this.elementsLookup.has(\"__gc_link\") &&\r\n      this.elementsLookup.has(\"__gc_mark\")\r\n    ) {\r\n      // __gc_allocate(usize, (ref: usize) => void): usize\r\n      let element = <Element>this.elementsLookup.get(\"__gc_allocate\");\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let gcAllocateInstance = assert(this.resolver.resolveFunction(<FunctionPrototype>element, null));\r\n      let signature = gcAllocateInstance.signature;\r\n      assert(signature.parameterTypes.length == 2);\r\n      assert(signature.parameterTypes[0] == this.options.usizeType);\r\n      assert(signature.parameterTypes[1].signatureReference);\r\n      assert(signature.returnType == this.options.usizeType);\r\n\r\n      // __gc_link(usize, usize): void\r\n      element = <Element>this.elementsLookup.get(\"__gc_link\");\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let gcLinkInstance = assert(this.resolver.resolveFunction(<FunctionPrototype>element, null));\r\n      signature = gcLinkInstance.signature;\r\n      assert(signature.parameterTypes.length == 2);\r\n      assert(signature.parameterTypes[0] == this.options.usizeType);\r\n      assert(signature.parameterTypes[1] == this.options.usizeType);\r\n      assert(signature.returnType == Type.void);\r\n\r\n      // __gc_mark(usize): void\r\n      element = <Element>this.elementsLookup.get(\"__gc_mark\");\r\n      assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let gcMarkInstance = assert(this.resolver.resolveFunction(<FunctionPrototype>element, null));\r\n      signature = gcMarkInstance.signature;\r\n      assert(signature.parameterTypes.length == 1);\r\n      assert(signature.parameterTypes[0] == this.options.usizeType);\r\n      assert(signature.returnType == Type.void);\r\n\r\n      this.gcAllocateInstance = gcAllocateInstance;\r\n      this.gcLinkInstance = gcLinkInstance;\r\n      this.gcMarkInstance = gcMarkInstance;\r\n      let gcHookOffset = 2 * options.usizeType.byteSize; // .next + .prev\r\n      this.gcHookOffset =  gcHookOffset;\r\n      this.gcHeaderSize = (gcHookOffset + 4 + 7) & ~7;   // + .hook index + alignment\r\n      this.hasGC = true;\r\n    }\r\n  }\r\n\r\n  /** Sets a constant integer value. */\r\n  setConstantInteger(globalName: string, type: Type, value: I64): void {\r\n    assert(type.is(TypeFlags.INTEGER));\r\n    this.elementsLookup.set(globalName,\r\n      new Global(this, globalName, globalName, type, null, DecoratorFlags.NONE)\r\n        .withConstantIntegerValue(value)\r\n    );\r\n  }\r\n\r\n  /** Sets a constant float value. */\r\n  setConstantFloat(globalName: string, type: Type, value: f64): void {\r\n    assert(type.is(TypeFlags.FLOAT));\r\n    this.elementsLookup.set(globalName,\r\n      new Global(this, globalName, globalName, type, null, DecoratorFlags.NONE)\r\n        .withConstantFloatValue(value)\r\n    );\r\n  }\r\n\r\n  /** Tries to locate an import by traversing exports and queued exports. */\r\n  private tryLocateImport(\r\n    externalName: string,\r\n    queuedNamedExports: Map<string,QueuedExport>\r\n  ): Element | null {\r\n    var element: Element | null;\r\n    var fileLevelExports = this.fileLevelExports;\r\n    do {\r\n      if (element = fileLevelExports.get(externalName)) return element;\r\n      let queuedExport = queuedNamedExports.get(externalName);\r\n      if (!queuedExport) break;\r\n      if (queuedExport.isReExport) {\r\n        externalName = queuedExport.externalName;\r\n        continue;\r\n      }\r\n      return this.elementsLookup.get(queuedExport.externalName);\r\n    } while (true);\r\n    return null;\r\n  }\r\n\r\n  /** Checks that only supported decorators are present. */\r\n  private checkDecorators(\r\n    decorators: DecoratorNode[],\r\n    acceptedFlags: DecoratorFlags\r\n  ): DecoratorFlags {\r\n    var presentFlags = DecoratorFlags.NONE;\r\n    for (let i = 0, k = decorators.length; i < k; ++i) {\r\n      let decorator = decorators[i];\r\n      let kind = decoratorNameToKind(decorator.name);\r\n      let flag = decoratorKindToFlag(kind);\r\n      if (flag) {\r\n        if (flag == DecoratorFlags.BUILTIN) {\r\n          if (decorator.range.source.isLibrary) {\r\n            presentFlags |= flag;\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Decorator_0_is_not_valid_here,\r\n              decorator.range, decorator.name.range.toString()\r\n            );\r\n          }\r\n        } else if (!(acceptedFlags & flag)) {\r\n          this.error(\r\n            DiagnosticCode.Decorator_0_is_not_valid_here,\r\n            decorator.range, decorator.name.range.toString()\r\n          );\r\n        } else if (presentFlags & flag) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_decorator,\r\n            decorator.range, decorator.name.range.toString()\r\n          );\r\n        } else {\r\n          presentFlags |= flag;\r\n        }\r\n      }\r\n    }\r\n    return presentFlags;\r\n  }\r\n\r\n  /** Checks and sets up global options of an element. */\r\n  private checkGlobal(\r\n    element: Element,\r\n    declaration: DeclarationStatement\r\n  ): void {\r\n    var parentNode = declaration.parent;\r\n    // alias globally if explicitly annotated @global or exported from a top-level library file\r\n    if (\r\n      (element.hasDecorator(DecoratorFlags.GLOBAL)) ||\r\n      (\r\n        declaration.range.source.isLibrary &&\r\n        element.is(CommonFlags.EXPORT) &&\r\n        (\r\n          assert(parentNode).kind == NodeKind.SOURCE ||\r\n          (\r\n            <Node>parentNode).kind == NodeKind.VARIABLE &&\r\n            assert((<Node>parentNode).parent).kind == NodeKind.SOURCE\r\n          )\r\n        )\r\n    ) {\r\n      let globalName = declaration.programLevelInternalName;\r\n      if (this.elementsLookup.has(globalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, element.internalName\r\n        );\r\n      } else {\r\n        this.elementsLookup.set(globalName, element);\r\n      }\r\n    }\r\n    // builtins use the global name directly\r\n    if (element.hasDecorator(DecoratorFlags.BUILTIN)) {\r\n      element.internalName = declaration.programLevelInternalName;\r\n    }\r\n  }\r\n\r\n  /** Initializes a class declaration. */\r\n  private initializeClass(\r\n    declaration: ClassDeclaration,\r\n    queuedExtends: ClassPrototype[],\r\n    queuedImplements: ClassPrototype[],\r\n    namespace: Element | null = null\r\n  ): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(internalName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, internalName\r\n      );\r\n      return;\r\n    }\r\n\r\n    var decorators = declaration.decorators;\r\n    var simpleName = declaration.name.text;\r\n    var prototype = new ClassPrototype(\r\n      this,\r\n      simpleName,\r\n      internalName,\r\n      declaration,\r\n      decorators\r\n        ? this.checkDecorators(decorators,\r\n            DecoratorFlags.GLOBAL |\r\n            DecoratorFlags.SEALED |\r\n            DecoratorFlags.UNMANAGED\r\n          )\r\n        : DecoratorFlags.NONE\r\n    );\r\n    prototype.parent = namespace;\r\n    this.elementsLookup.set(internalName, prototype);\r\n\r\n    var implementsTypes = declaration.implementsTypes;\r\n    if (implementsTypes) {\r\n      let numImplementsTypes = implementsTypes.length;\r\n      if (prototype.hasDecorator(DecoratorFlags.UNMANAGED)) {\r\n        if (numImplementsTypes) {\r\n          this.error(\r\n            DiagnosticCode.Unmanaged_classes_cannot_implement_interfaces,\r\n            Range.join(\r\n              declaration.name.range,\r\n              implementsTypes[numImplementsTypes - 1].range\r\n            )\r\n          );\r\n        }\r\n\r\n      // remember classes that implement interfaces\r\n      } else if (numImplementsTypes) {\r\n        for (let i = 0; i < numImplementsTypes; ++i) {\r\n          this.warning( // TODO\r\n            DiagnosticCode.Operation_not_supported,\r\n            implementsTypes[i].range\r\n          );\r\n        }\r\n        queuedImplements.push(prototype);\r\n      }\r\n    }\r\n\r\n    // remember classes that extend another one\r\n    if (declaration.extendsType) queuedExtends.push(prototype);\r\n\r\n    // add as namespace member if applicable\r\n    if (namespace) {\r\n      if (namespace.members) {\r\n        if (namespace.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        namespace.members = new Map();\r\n      }\r\n      namespace.members.set(simpleName, prototype);\r\n      if (namespace.is(CommonFlags.MODULE_EXPORT) && prototype.is(CommonFlags.EXPORT)) {\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n\r\n    // otherwise add to file-level exports if exported\r\n    } else if (prototype.is(CommonFlags.EXPORT)) {\r\n      if (this.fileLevelExports.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      this.fileLevelExports.set(internalName, prototype);\r\n      this.currentFilespace.members.set(simpleName, prototype);\r\n      if (prototype.is(CommonFlags.EXPORT) && declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          this.error(\r\n            DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n            declaration.name.range, existingExport.element.internalName\r\n          );\r\n          return;\r\n        }\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n          element: prototype,\r\n          identifier: declaration.name\r\n        });\r\n      }\r\n    }\r\n\r\n    // initialize members\r\n    var memberDeclarations = declaration.members;\r\n    for (let i = 0, k = memberDeclarations.length; i < k; ++i) {\r\n      let memberDeclaration = memberDeclarations[i];\r\n      switch (memberDeclaration.kind) {\r\n        case NodeKind.FIELDDECLARATION: {\r\n          this.initializeField(<FieldDeclaration>memberDeclaration, prototype);\r\n          break;\r\n        }\r\n        case NodeKind.METHODDECLARATION: {\r\n          if (memberDeclaration.isAny(CommonFlags.GET | CommonFlags.SET)) {\r\n            this.initializeAccessor(<MethodDeclaration>memberDeclaration, prototype);\r\n          } else {\r\n            this.initializeMethod(<MethodDeclaration>memberDeclaration, prototype);\r\n          }\r\n          break;\r\n        }\r\n        default: {\r\n          assert(false); // should have been reported while parsing\r\n          return;\r\n        }\r\n      }\r\n    }\r\n\r\n    this.checkGlobal(prototype, declaration);\r\n  }\r\n\r\n  /** Initializes a field of a class or interface. */\r\n  private initializeField(\r\n    declaration: FieldDeclaration,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    var name = declaration.name.text;\r\n    var internalName = declaration.fileLevelInternalName;\r\n    var decorators = declaration.decorators;\r\n    var isInterface = classPrototype.kind == ElementKind.INTERFACE_PROTOTYPE;\r\n\r\n    // static fields become global variables\r\n    if (declaration.is(CommonFlags.STATIC)) {\r\n      if (isInterface) {\r\n        // should have been reported while parsing\r\n        assert(false);\r\n      }\r\n      if (this.elementsLookup.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      if (classPrototype.members) {\r\n        if (classPrototype.members.has(name)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.members = new Map();\r\n      }\r\n      let staticField = new Global(\r\n        this,\r\n        name,\r\n        internalName,\r\n        Type.void, // resolved later on\r\n        declaration,\r\n        decorators\r\n          ? this.checkDecorators(decorators, DecoratorFlags.INLINE)\r\n          : DecoratorFlags.NONE\r\n      );\r\n      staticField.parent = classPrototype;\r\n      classPrototype.members.set(name, staticField);\r\n      this.elementsLookup.set(internalName, staticField);\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        staticField.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n\r\n      if (staticField.hasDecorator(DecoratorFlags.INLINE) && !staticField.is(CommonFlags.READONLY)) {\r\n        this.error(\r\n          DiagnosticCode.Decorator_0_is_not_valid_here,\r\n          assert(findDecorator(DecoratorKind.INLINE, decorators)).range, \"inline\"\r\n        );\r\n      }\r\n\r\n    // instance fields are remembered until resolved\r\n    } else {\r\n      if (isInterface) {\r\n        // should have been reported while parsing\r\n        assert(!declaration.isAny(CommonFlags.ABSTRACT | CommonFlags.GET | CommonFlags.SET));\r\n      }\r\n      if (classPrototype.instanceMembers) {\r\n        if (classPrototype.instanceMembers.has(name)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.instanceMembers = new Map();\r\n      }\r\n      let instanceField = new FieldPrototype(\r\n        classPrototype,\r\n        name,\r\n        internalName,\r\n        declaration\r\n      );\r\n      if (decorators) this.checkDecorators(decorators, DecoratorFlags.NONE);\r\n      classPrototype.instanceMembers.set(name, instanceField);\r\n    }\r\n  }\r\n\r\n  /** Initializes a method of a class or interface. */\r\n  private initializeMethod(\r\n    declaration: MethodDeclaration,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    var simpleName = declaration.name.text;\r\n    var internalName = declaration.fileLevelInternalName;\r\n    var prototype: FunctionPrototype | null = null;\r\n\r\n    var decorators = declaration.decorators;\r\n    var decoratorFlags = DecoratorFlags.NONE;\r\n    if (decorators) {\r\n      decoratorFlags = this.checkDecorators(decorators,\r\n        DecoratorFlags.OPERATOR_BINARY  |\r\n        DecoratorFlags.OPERATOR_PREFIX  |\r\n        DecoratorFlags.OPERATOR_POSTFIX |\r\n        DecoratorFlags.INLINE\r\n      );\r\n    }\r\n\r\n    // static methods become global functions\r\n    if (declaration.is(CommonFlags.STATIC)) {\r\n      assert(declaration.name.kind != NodeKind.CONSTRUCTOR);\r\n\r\n      if (this.elementsLookup.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0, declaration.name.range,\r\n          internalName\r\n        );\r\n        return;\r\n      }\r\n      if (classPrototype.members) {\r\n        if (classPrototype.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.members = new Map();\r\n      }\r\n      prototype = new FunctionPrototype(\r\n        this,\r\n        simpleName,\r\n        internalName,\r\n        declaration,\r\n        classPrototype,\r\n        decoratorFlags\r\n      );\r\n      classPrototype.members.set(simpleName, prototype);\r\n      this.elementsLookup.set(internalName, prototype);\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n\r\n    // instance methods are remembered until resolved\r\n    } else {\r\n      if (classPrototype.instanceMembers) {\r\n        if (classPrototype.instanceMembers.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.instanceMembers = new Map();\r\n      }\r\n      prototype = new FunctionPrototype(\r\n        this,\r\n        simpleName,\r\n        internalName,\r\n        declaration,\r\n        classPrototype,\r\n        decoratorFlags\r\n      );\r\n      // if (classPrototype.isUnmanaged && instancePrototype.isAbstract) {\r\n      //   this.error( Unmanaged classes cannot declare abstract methods. );\r\n      // }\r\n      if (declaration.name.kind == NodeKind.CONSTRUCTOR) {\r\n        if (classPrototype.constructorPrototype) {\r\n          this.error(\r\n            DiagnosticCode.Multiple_constructor_implementations_are_not_allowed,\r\n            declaration.name.range\r\n          );\r\n        } else {\r\n          prototype.set(CommonFlags.CONSTRUCTOR);\r\n          classPrototype.constructorPrototype = prototype;\r\n        }\r\n      } else {\r\n        classPrototype.instanceMembers.set(simpleName, prototype);\r\n      }\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    }\r\n\r\n    this.checkOperatorOverloads(declaration.decorators, prototype, classPrototype);\r\n  }\r\n\r\n  private checkOperatorOverloads(\r\n    decorators: DecoratorNode[] | null,\r\n    prototype: FunctionPrototype,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    if (decorators) {\r\n      for (let i = 0, k = decorators.length; i < k; ++i) {\r\n        let decorator = decorators[i];\r\n        switch (decorator.decoratorKind) {\r\n          case DecoratorKind.OPERATOR:\r\n          case DecoratorKind.OPERATOR_BINARY:\r\n          case DecoratorKind.OPERATOR_PREFIX:\r\n          case DecoratorKind.OPERATOR_POSTFIX: {\r\n            let numArgs = decorator.arguments && decorator.arguments.length || 0;\r\n            if (numArgs == 1) {\r\n              let firstArg = (<Expression[]>decorator.arguments)[0];\r\n              if (\r\n                firstArg.kind == NodeKind.LITERAL &&\r\n                (<LiteralExpression>firstArg).literalKind == LiteralKind.STRING\r\n              ) {\r\n                let kind = operatorKindFromDecorator(\r\n                  decorator.decoratorKind,\r\n                  (<StringLiteralExpression>firstArg).value\r\n                );\r\n                if (kind == OperatorKind.INVALID) {\r\n                  this.error(\r\n                    DiagnosticCode.Operation_not_supported,\r\n                    firstArg.range\r\n                  );\r\n                } else {\r\n                  let overloads = classPrototype.overloadPrototypes;\r\n                  if (overloads.has(kind)) {\r\n                    this.error(\r\n                      DiagnosticCode.Duplicate_function_implementation,\r\n                      firstArg.range\r\n                    );\r\n                  } else {\r\n                    prototype.operatorKind = kind;\r\n                    overloads.set(kind, prototype);\r\n                  }\r\n                }\r\n              } else {\r\n                this.error(\r\n                  DiagnosticCode.String_literal_expected,\r\n                  firstArg.range\r\n                );\r\n              }\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode.Expected_0_arguments_but_got_1,\r\n                decorator.range, \"1\", numArgs.toString(0)\r\n              );\r\n            }\r\n          }\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  private initializeAccessor(\r\n    declaration: MethodDeclaration,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    var simpleName = declaration.name.text;\r\n    var internalPropertyName = declaration.fileLevelInternalName;\r\n    var propertyElement = this.elementsLookup.get(internalPropertyName);\r\n    var isGetter = declaration.is(CommonFlags.GET);\r\n    var isNew = false;\r\n    if (propertyElement) {\r\n      if (\r\n        propertyElement.kind != ElementKind.PROPERTY ||\r\n        (isGetter\r\n          ? (<Property>propertyElement).getterPrototype\r\n          : (<Property>propertyElement).setterPrototype\r\n        ) != null\r\n      ) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, internalPropertyName\r\n        );\r\n        return;\r\n      }\r\n    } else {\r\n      propertyElement = new Property(\r\n        this,\r\n        simpleName,\r\n        internalPropertyName,\r\n        classPrototype\r\n      );\r\n      isNew = true;\r\n    }\r\n\r\n    var decorators = declaration.decorators;\r\n    var decoratorFlags = DecoratorFlags.NONE;\r\n    if (decorators) {\r\n      decoratorFlags = this.checkDecorators(decorators,\r\n        DecoratorFlags.INLINE\r\n      );\r\n    }\r\n\r\n    var baseName = (isGetter ? GETTER_PREFIX : SETTER_PREFIX) + simpleName;\r\n\r\n    // static accessors become global functions\r\n    if (declaration.is(CommonFlags.STATIC)) {\r\n      let staticName = classPrototype.internalName + STATIC_DELIMITER + baseName;\r\n      if (this.elementsLookup.has(staticName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, staticName\r\n        );\r\n        return;\r\n      }\r\n      let staticPrototype = new FunctionPrototype(\r\n        this,\r\n        baseName,\r\n        staticName,\r\n        declaration,\r\n        null,\r\n        decoratorFlags\r\n      );\r\n      if (isGetter) {\r\n        (<Property>propertyElement).getterPrototype = staticPrototype;\r\n      } else {\r\n        (<Property>propertyElement).setterPrototype = staticPrototype;\r\n      }\r\n      if (isNew) {\r\n        if (classPrototype.members) {\r\n          if (classPrototype.members.has(simpleName)) {\r\n            this.error(\r\n              DiagnosticCode.Duplicate_identifier_0,\r\n              declaration.name.range, staticName\r\n            );\r\n            return;\r\n          }\r\n        } else {\r\n          classPrototype.members = new Map();\r\n        }\r\n        classPrototype.members.set(simpleName, propertyElement); // check above\r\n      } else {\r\n        assert(classPrototype.members && classPrototype.members.has(simpleName));\r\n      }\r\n      this.elementsLookup.set(internalPropertyName, propertyElement);\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        propertyElement.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n\r\n    // instance accessors are remembered until resolved\r\n    } else {\r\n      let instanceName = classPrototype.internalName + INSTANCE_DELIMITER + baseName;\r\n      if (classPrototype.instanceMembers) {\r\n        if (classPrototype.instanceMembers.has(baseName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalPropertyName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        classPrototype.instanceMembers = new Map();\r\n      }\r\n      let instancePrototype = new FunctionPrototype(\r\n        this,\r\n        baseName,\r\n        instanceName,\r\n        declaration,\r\n        classPrototype,\r\n        decoratorFlags\r\n      );\r\n      if (isGetter) {\r\n        (<Property>propertyElement).getterPrototype = instancePrototype;\r\n      } else {\r\n        (<Property>propertyElement).setterPrototype = instancePrototype;\r\n      }\r\n      classPrototype.instanceMembers.set(baseName, propertyElement);\r\n      this.elementsLookup.set(internalPropertyName, propertyElement);\r\n      if (classPrototype.is(CommonFlags.MODULE_EXPORT)) {\r\n        propertyElement.set(CommonFlags.MODULE_EXPORT);\r\n        instancePrototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    }\r\n  }\r\n\r\n  private initializeEnum(\r\n    declaration: EnumDeclaration,\r\n    namespace: Element | null = null\r\n  ): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(internalName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, internalName\r\n      );\r\n      return;\r\n    }\r\n    var simpleName = declaration.name.text;\r\n    var element = new Enum(this, simpleName, internalName, declaration);\r\n    element.parent = namespace;\r\n    this.elementsLookup.set(internalName, element);\r\n\r\n    if (namespace) {\r\n      if (namespace.members) {\r\n        if (namespace.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        namespace.members = new Map();\r\n      }\r\n      namespace.members.set(simpleName, element);\r\n      if (namespace.is(CommonFlags.MODULE_EXPORT) && element.is(CommonFlags.EXPORT)) {\r\n        element.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    } else if (element.is(CommonFlags.EXPORT)) { // no namespace\r\n      if (this.fileLevelExports.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      this.fileLevelExports.set(internalName, element);\r\n      this.currentFilespace.members.set(simpleName, element);\r\n      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          this.error(\r\n            DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n            declaration.name.range, existingExport.element.internalName\r\n          );\r\n          return;\r\n        }\r\n        element.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n          element,\r\n          identifier: declaration.name\r\n        });\r\n      }\r\n    }\r\n\r\n    var values = declaration.values;\r\n    for (let i = 0, k = values.length; i < k; ++i) {\r\n      this.initializeEnumValue(values[i], element);\r\n    }\r\n\r\n    this.checkGlobal(element, declaration);\r\n  }\r\n\r\n  private initializeEnumValue(\r\n    declaration: EnumValueDeclaration,\r\n    enm: Enum\r\n  ): void {\r\n    var name = declaration.name.text;\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (enm.members) {\r\n      if (enm.members.has(name)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n    } else {\r\n      enm.members = new Map();\r\n    }\r\n    var value = new EnumValue(enm, this, name, internalName, declaration);\r\n    enm.members.set(name, value);\r\n    if (enm.is(CommonFlags.MODULE_EXPORT)) {\r\n      value.set(CommonFlags.MODULE_EXPORT);\r\n    }\r\n  }\r\n\r\n  private initializeExports(\r\n    statement: ExportStatement,\r\n    queuedExports: Map<string,QueuedExport>\r\n  ): void {\r\n    var members = statement.members;\r\n    if (members) { // named\r\n      for (let i = 0, k = members.length; i < k; ++i) {\r\n        this.initializeExport(members[i], statement.internalPath, queuedExports);\r\n      }\r\n    } else { // TODO: filespace\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        statement.range\r\n      );\r\n    }\r\n  }\r\n\r\n  private setExportAndCheckLibrary(\r\n    internalName: string,\r\n    element: Element,\r\n    externalIdentifier: IdentifierExpression\r\n  ): void {\r\n    // add to file-level exports\r\n    this.fileLevelExports.set(internalName, element);\r\n\r\n    // add to filespace\r\n    var internalPath = externalIdentifier.range.source.internalPath;\r\n    var prefix = FILESPACE_PREFIX + internalPath;\r\n    var filespace = this.elementsLookup.get(prefix);\r\n    if (!filespace) filespace = assert(this.elementsLookup.get(prefix + PATH_DELIMITER + \"index\"));\r\n    assert(filespace.kind == ElementKind.FILESPACE);\r\n    var simpleName = externalIdentifier.text;\r\n    (<Filespace>filespace).members.set(simpleName, element);\r\n\r\n    // add global alias if a top-level export of a library file\r\n    var source = externalIdentifier.range.source;\r\n    if (source.isLibrary) {\r\n      if (this.elementsLookup.has(simpleName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          externalIdentifier.range, simpleName\r\n        );\r\n      } else {\r\n        element.internalName = simpleName;\r\n        this.elementsLookup.set(simpleName, element);\r\n      }\r\n\r\n    // add module level export if a top-level export of an entry file\r\n    } else if (source.isEntry) {\r\n      this.moduleLevelExports.set(externalIdentifier.text, <ModuleExport>{\r\n        element,\r\n        identifier: externalIdentifier\r\n      });\r\n    }\r\n  }\r\n\r\n  private initializeExport(\r\n    member: ExportMember,\r\n    internalPath: string | null,\r\n    queuedExports: Map<string,QueuedExport>\r\n  ): void {\r\n    var externalName = member.range.source.internalPath + PATH_DELIMITER + member.externalName.text;\r\n    if (this.fileLevelExports.has(externalName)) {\r\n      this.error(\r\n        DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n        member.externalName.range, externalName\r\n      );\r\n      return;\r\n    }\r\n    var referencedName: string;\r\n    var referencedElement: Element | null;\r\n    var queuedExport: QueuedExport | null;\r\n\r\n    // export local element\r\n    if (internalPath == null) {\r\n      referencedName = member.range.source.internalPath + PATH_DELIMITER + member.name.text;\r\n\r\n      // resolve right away if the element exists\r\n      if (this.elementsLookup.has(referencedName)) {\r\n        this.setExportAndCheckLibrary(\r\n          externalName,\r\n          <Element>this.elementsLookup.get(referencedName),\r\n          member.externalName\r\n        );\r\n        return;\r\n      }\r\n\r\n      // otherwise queue it\r\n      if (queuedExports.has(externalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          member.externalName.range, externalName\r\n        );\r\n        return;\r\n      }\r\n      queuedExport = new QueuedExport();\r\n      queuedExport.isReExport = false;\r\n      queuedExport.externalName = referencedName; // -> here: local name\r\n      queuedExport.member = member;\r\n      queuedExports.set(externalName, queuedExport);\r\n\r\n    // export external element\r\n    } else {\r\n      referencedName = internalPath + PATH_DELIMITER + member.name.text;\r\n\r\n      // resolve right away if the export exists\r\n      referencedElement = this.elementsLookup.get(referencedName);\r\n      if (referencedElement) {\r\n        this.setExportAndCheckLibrary(\r\n          externalName,\r\n          referencedElement,\r\n          member.externalName\r\n        );\r\n        return;\r\n      }\r\n\r\n      // walk already known queued exports\r\n      let seen = new Set<QueuedExport>();\r\n      while (queuedExport = queuedExports.get(referencedName)) {\r\n        if (queuedExport.isReExport) {\r\n          referencedElement = this.fileLevelExports.get(queuedExport.externalName);\r\n          if (referencedElement) {\r\n            this.setExportAndCheckLibrary(\r\n              externalName,\r\n              referencedElement,\r\n              member.externalName\r\n            );\r\n            return;\r\n          }\r\n          referencedName = queuedExport.externalName;\r\n          if (seen.has(queuedExport)) break;\r\n          seen.add(queuedExport);\r\n        } else {\r\n          referencedElement = this.elementsLookup.get(queuedExport.externalName);\r\n          if (referencedElement) {\r\n            this.setExportAndCheckLibrary(\r\n              externalName,\r\n              referencedElement,\r\n              member.externalName\r\n            );\r\n            return;\r\n          }\r\n          break;\r\n        }\r\n      }\r\n\r\n      // otherwise queue it\r\n      if (queuedExports.has(externalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          member.externalName.range, externalName\r\n        );\r\n        return;\r\n      }\r\n      queuedExport = new QueuedExport();\r\n      queuedExport.isReExport = true;\r\n      queuedExport.externalName = referencedName; // -> here: external name\r\n      queuedExport.member = member;\r\n      queuedExports.set(externalName, queuedExport);\r\n    }\r\n  }\r\n\r\n  private initializeFunction(\r\n    declaration: FunctionDeclaration,\r\n    namespace: Element | null = null\r\n  ): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(internalName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, internalName\r\n      );\r\n      return;\r\n    }\r\n    var simpleName = declaration.name.text;\r\n    var decorators = declaration.decorators;\r\n    var prototype = new FunctionPrototype(\r\n      this,\r\n      simpleName,\r\n      internalName,\r\n      declaration,\r\n      null,\r\n      decorators\r\n        ? this.checkDecorators(decorators,\r\n            DecoratorFlags.GLOBAL |\r\n            DecoratorFlags.INLINE |\r\n            DecoratorFlags.EXTERNAL\r\n          )\r\n        : DecoratorFlags.NONE\r\n    );\r\n    prototype.parent = namespace;\r\n    this.elementsLookup.set(internalName, prototype);\r\n\r\n    if (namespace) {\r\n      if (namespace.members) {\r\n        if (namespace.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        namespace.members = new Map();\r\n      }\r\n      namespace.members.set(simpleName, prototype);\r\n      if (namespace.is(CommonFlags.MODULE_EXPORT) && prototype.is(CommonFlags.EXPORT)) {\r\n        prototype.parent = namespace;\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    } else if (prototype.is(CommonFlags.EXPORT)) { // no namespace\r\n      if (this.fileLevelExports.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      this.fileLevelExports.set(internalName, prototype);\r\n      this.currentFilespace.members.set(simpleName, prototype);\r\n      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, existingExport.element.internalName\r\n          );\r\n          return;\r\n        }\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n          element: prototype,\r\n          identifier: declaration.name\r\n        });\r\n      }\r\n    }\r\n\r\n    this.checkGlobal(prototype, declaration);\r\n  }\r\n\r\n  private initializeImports(\r\n    statement: ImportStatement,\r\n    queuedExports: Map<string,QueuedExport>,\r\n    queuedImports: QueuedImport[]\r\n  ): void {\r\n    var declarations = statement.declarations;\r\n    if (declarations) {\r\n      for (let i = 0, k = declarations.length; i < k; ++i) {\r\n        this.initializeImport(\r\n          declarations[i],\r\n          statement.internalPath,\r\n          queuedExports, queuedImports\r\n        );\r\n      }\r\n    } else if (statement.namespaceName) { // import * as simpleName from \"file\"\r\n      let simpleName = statement.namespaceName.text;\r\n      let internalName = (\r\n        statement.range.source.internalPath +\r\n        PATH_DELIMITER +\r\n        simpleName\r\n      );\r\n      if (this.elementsLookup.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          statement.namespaceName.range,\r\n          internalName\r\n        );\r\n        return;\r\n      }\r\n\r\n      // resolve right away if the exact filespace exists\r\n      let filespace = this.elementsLookup.get(statement.internalPath);\r\n      if (filespace) {\r\n        this.elementsLookup.set(internalName, filespace);\r\n        return;\r\n      }\r\n\r\n      // otherwise queue it\r\n      let queuedImport = new QueuedImport();\r\n      queuedImport.localName = internalName;\r\n      let externalName = FILESPACE_PREFIX + statement.internalPath;\r\n      queuedImport.externalName = externalName;\r\n      queuedImport.externalNameAlt = externalName + PATH_DELIMITER + \"index\";\r\n      queuedImport.declaration = null; // filespace\r\n      queuedImports.push(queuedImport);\r\n    }\r\n  }\r\n\r\n  private initializeImport(\r\n    declaration: ImportDeclaration,\r\n    internalPath: string,\r\n    queuedNamedExports: Map<string,QueuedExport>,\r\n    queuedImports: QueuedImport[]\r\n  ): void {\r\n    var localName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(localName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, localName\r\n      );\r\n      return;\r\n    }\r\n\r\n    var externalName = internalPath + PATH_DELIMITER + declaration.externalName.text;\r\n\r\n    // resolve right away if the exact export exists\r\n    var element: Element | null;\r\n    if (element = this.fileLevelExports.get(externalName)) {\r\n      this.elementsLookup.set(localName, element);\r\n      return;\r\n    }\r\n\r\n    // otherwise queue it\r\n    const indexPart = PATH_DELIMITER + \"index\";\r\n    var queuedImport = new QueuedImport();\r\n    queuedImport.localName = localName;\r\n    if (internalPath.endsWith(indexPart)) {\r\n      queuedImport.externalName = externalName; // try exact first\r\n      queuedImport.externalNameAlt = (\r\n        internalPath.substring(0, internalPath.length - indexPart.length + 1) +\r\n        declaration.externalName.text\r\n      );\r\n    } else {\r\n      queuedImport.externalName = externalName; // try exact first\r\n      queuedImport.externalNameAlt = (\r\n        internalPath +\r\n        indexPart +\r\n        PATH_DELIMITER +\r\n        declaration.externalName.text\r\n      );\r\n    }\r\n    queuedImport.declaration = declaration; // named\r\n    queuedImports.push(queuedImport);\r\n  }\r\n\r\n  private initializeInterface(declaration: InterfaceDeclaration, namespace: Element | null = null): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    if (this.elementsLookup.has(internalName)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, internalName\r\n      );\r\n      return;\r\n    }\r\n\r\n    var decorators = declaration.decorators;\r\n    var simpleName = declaration.name.text;\r\n    var prototype = new InterfacePrototype(\r\n      this,\r\n      simpleName,\r\n      internalName,\r\n      declaration,\r\n      decorators\r\n        ? this.checkDecorators(decorators, DecoratorFlags.GLOBAL)\r\n        : DecoratorFlags.NONE\r\n    );\r\n    prototype.parent = namespace;\r\n    this.elementsLookup.set(internalName, prototype);\r\n\r\n    if (namespace) {\r\n      if (namespace.members) {\r\n        if (namespace.members.has(prototype.internalName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        namespace.members = new Map();\r\n      }\r\n      namespace.members.set(prototype.internalName, prototype);\r\n      if (namespace.is(CommonFlags.MODULE_EXPORT) && prototype.is(CommonFlags.EXPORT)) {\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    } else if (prototype.is(CommonFlags.EXPORT)) { // no namespace\r\n      if (this.fileLevelExports.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        return;\r\n      }\r\n      this.fileLevelExports.set(internalName, prototype);\r\n      this.currentFilespace.members.set(simpleName, prototype);\r\n      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, existingExport.element.internalName\r\n          );\r\n          return;\r\n        }\r\n        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n          element: prototype,\r\n          identifier: declaration.name\r\n        });\r\n      }\r\n    }\r\n\r\n    var memberDeclarations = declaration.members;\r\n    for (let i = 0, k = memberDeclarations.length; i < k; ++i) {\r\n      let memberDeclaration = memberDeclarations[i];\r\n      switch (memberDeclaration.kind) {\r\n\r\n        case NodeKind.FIELDDECLARATION: {\r\n          this.initializeField(<FieldDeclaration>memberDeclaration, prototype);\r\n          break;\r\n        }\r\n        case NodeKind.METHODDECLARATION: {\r\n          if (memberDeclaration.isAny(CommonFlags.GET | CommonFlags.SET)) {\r\n            this.initializeAccessor(<MethodDeclaration>memberDeclaration, prototype);\r\n          } else {\r\n            this.initializeMethod(<MethodDeclaration>memberDeclaration, prototype);\r\n          }\r\n          break;\r\n        }\r\n        default: {\r\n          throw new Error(\"interface member expected\");\r\n        }\r\n      }\r\n    }\r\n\r\n    this.checkGlobal(prototype, declaration);\r\n  }\r\n\r\n  private initializeNamespace(\r\n    declaration: NamespaceDeclaration,\r\n    queuedExtends: ClassPrototype[],\r\n    queuedImplements: ClassPrototype[],\r\n    parentNamespace: Element | null = null\r\n  ): void {\r\n    var internalName = declaration.fileLevelInternalName;\r\n    var simpleName = declaration.name.text;\r\n    var namespace = this.elementsLookup.get(internalName);\r\n    if (!namespace) {\r\n      namespace = new Namespace(this, simpleName, internalName, declaration);\r\n      namespace.parent = parentNamespace;\r\n      this.elementsLookup.set(internalName, namespace);\r\n      this.checkGlobal(namespace, declaration);\r\n    }\r\n\r\n    if (parentNamespace) {\r\n      if (parentNamespace.members) {\r\n        if (parentNamespace.members.has(simpleName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n          return;\r\n        }\r\n      } else {\r\n        parentNamespace.members = new Map();\r\n      }\r\n      parentNamespace.members.set(simpleName, namespace);\r\n      if (parentNamespace.is(CommonFlags.MODULE_EXPORT) && namespace.is(CommonFlags.EXPORT)) {\r\n        namespace.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    } else if (namespace.is(CommonFlags.EXPORT)) { // no parent namespace\r\n      let existingExport = this.fileLevelExports.get(internalName);\r\n      if (existingExport) {\r\n        if (!existingExport.is(CommonFlags.EXPORT)) {\r\n          this.error(\r\n            DiagnosticCode.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local,\r\n            declaration.name.range, namespace.internalName\r\n          ); // recoverable\r\n        }\r\n        namespace = existingExport; // join\r\n      } else {\r\n        this.fileLevelExports.set(internalName, namespace);\r\n      }\r\n      this.currentFilespace.members.set(simpleName, namespace);\r\n      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.has(simpleName)) {\r\n          let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n          if (existingExport.element !== namespace) { // not merged\r\n            this.error(\r\n              DiagnosticCode.Duplicate_identifier_0,\r\n              declaration.name.range, existingExport.element.internalName\r\n            );\r\n            return;\r\n          }\r\n        } else {\r\n          this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n            element: namespace,\r\n            identifier: declaration.name\r\n          });\r\n        }\r\n        namespace.set(CommonFlags.MODULE_EXPORT);\r\n      }\r\n    }\r\n\r\n    var members = declaration.members;\r\n    for (let i = 0, k = members.length; i < k; ++i) {\r\n      switch (members[i].kind) {\r\n        case NodeKind.CLASSDECLARATION: {\r\n          this.initializeClass(<ClassDeclaration>members[i], queuedExtends, queuedImplements, namespace);\r\n          break;\r\n        }\r\n        case NodeKind.ENUMDECLARATION: {\r\n          this.initializeEnum(<EnumDeclaration>members[i], namespace);\r\n          break;\r\n        }\r\n        case NodeKind.FUNCTIONDECLARATION: {\r\n          this.initializeFunction(<FunctionDeclaration>members[i], namespace);\r\n          break;\r\n        }\r\n        case NodeKind.INTERFACEDECLARATION: {\r\n          this.initializeInterface(<InterfaceDeclaration>members[i], namespace);\r\n          break;\r\n        }\r\n        case NodeKind.NAMESPACEDECLARATION: {\r\n          this.initializeNamespace(<NamespaceDeclaration>members[i], queuedExtends, queuedImplements, namespace);\r\n          break;\r\n        }\r\n        case NodeKind.TYPEDECLARATION: {\r\n          // this.initializeTypeAlias(<TypeDeclaration>members[i], namespace);\r\n          // TODO: what about namespaced types?\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            members[i].range\r\n          );\r\n          break;\r\n        }\r\n        case NodeKind.VARIABLE: {\r\n          this.initializeVariables(<VariableStatement>members[i], namespace);\r\n          break;\r\n        }\r\n        default: {\r\n          throw new Error(\"namespace member expected\");\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  private initializeTypeAlias(declaration: TypeDeclaration, namespace: Element | null = null): void {\r\n    // type aliases are program globals\r\n    // TODO: what about namespaced types?\r\n    var name = declaration.name.text;\r\n    if (this.typesLookup.has(name) || this.typeAliases.has(name)) {\r\n      this.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        declaration.name.range, name\r\n      );\r\n      return;\r\n    }\r\n    var alias = new TypeAlias();\r\n    alias.typeParameters = declaration.typeParameters;\r\n    alias.type = declaration.type;\r\n    this.typeAliases.set(name, alias);\r\n  }\r\n\r\n  private initializeVariables(statement: VariableStatement, namespace: Element | null = null): void {\r\n    var declarations = statement.declarations;\r\n    for (let i = 0, k = declarations.length; i < k; ++i) {\r\n      let declaration = declarations[i];\r\n      let decorators = declaration.decorators;\r\n      let internalName = declaration.fileLevelInternalName;\r\n      if (this.elementsLookup.has(internalName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, internalName\r\n        );\r\n        continue;\r\n      }\r\n      let simpleName = declaration.name.text;\r\n      let global = new Global(\r\n        this,\r\n        simpleName,\r\n        internalName,\r\n        Type.void, // resolved later on\r\n        declaration,\r\n        decorators\r\n          ? this.checkDecorators(decorators,\r\n              DecoratorFlags.GLOBAL |\r\n              DecoratorFlags.INLINE |\r\n              DecoratorFlags.EXTERNAL\r\n            )\r\n          : DecoratorFlags.NONE\r\n      );\r\n      global.parent = namespace;\r\n      this.elementsLookup.set(internalName, global);\r\n\r\n      if (global.hasDecorator(DecoratorFlags.INLINE) && !global.is(CommonFlags.CONST)) {\r\n        this.error(\r\n          DiagnosticCode.Decorator_0_is_not_valid_here,\r\n          assert(findDecorator(DecoratorKind.INLINE, decorators)).range, \"inline\"\r\n        );\r\n      }\r\n\r\n      if (namespace) {\r\n        if (namespace.members) {\r\n          if (namespace.members.has(simpleName)) {\r\n            this.error(\r\n              DiagnosticCode.Duplicate_identifier_0,\r\n              declaration.name.range, internalName\r\n            );\r\n            continue;\r\n          }\r\n        } else {\r\n          namespace.members = new Map();\r\n        }\r\n        namespace.members.set(simpleName, global);\r\n        if (namespace.is(CommonFlags.MODULE_EXPORT) && global.is(CommonFlags.EXPORT)) {\r\n          global.set(CommonFlags.MODULE_EXPORT);\r\n        }\r\n      } else if (global.is(CommonFlags.EXPORT)) { // no namespace\r\n        if (this.fileLevelExports.has(internalName)) {\r\n          this.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range, internalName\r\n          );\r\n        } else {\r\n          this.fileLevelExports.set(internalName, global);\r\n        }\r\n        this.currentFilespace.members.set(simpleName, global);\r\n        if (declaration.range.source.isEntry) {\r\n          if (this.moduleLevelExports.has(simpleName)) {\r\n            let existingExport = <ModuleExport>this.moduleLevelExports.get(simpleName);\r\n            this.error(\r\n              DiagnosticCode.Duplicate_identifier_0,\r\n              declaration.name.range, existingExport.element.internalName\r\n            );\r\n            continue;\r\n          }\r\n          global.set(CommonFlags.MODULE_EXPORT);\r\n          this.moduleLevelExports.set(simpleName, <ModuleExport>{\r\n            element: global,\r\n            identifier: declaration.name\r\n          });\r\n        }\r\n      }\r\n      this.checkGlobal(global, declaration);\r\n    }\r\n  }\r\n}\r\n\r\n/** Indicates the specific kind of an {@link Element}. */\r\nexport enum ElementKind {\r\n  /** A {@link Global}. */\r\n  GLOBAL,\r\n  /** A {@link Local}. */\r\n  LOCAL,\r\n  /** An {@link Enum}. */\r\n  ENUM,\r\n  /** An {@link EnumValue}. */\r\n  ENUMVALUE,\r\n  /** A {@link FunctionPrototype}. */\r\n  FUNCTION_PROTOTYPE,\r\n  /** A {@link Function}. */\r\n  FUNCTION,\r\n  /** A {@link FunctionTarget}. */\r\n  FUNCTION_TARGET,\r\n  /** A {@link ClassPrototype}. */\r\n  CLASS_PROTOTYPE,\r\n  /** A {@link Class}. */\r\n  CLASS,\r\n  /** An {@link InterfacePrototype}. */\r\n  INTERFACE_PROTOTYPE,\r\n  /** An {@link Interface}. */\r\n  INTERFACE,\r\n  /** A {@link FieldPrototype}. */\r\n  FIELD_PROTOTYPE,\r\n  /** A {@link Field}. */\r\n  FIELD,\r\n  /** A {@link Property}. */\r\n  PROPERTY,\r\n  /** A {@link Namespace}. */\r\n  NAMESPACE,\r\n  /** A {@link Filespace}. */\r\n  FILESPACE,\r\n}\r\n\r\nexport enum DecoratorFlags {\r\n  /** No flags set. */\r\n  NONE = 0,\r\n  /** Is a program global. */\r\n  GLOBAL = 1 << 0,\r\n  /** Is a binary operator overload. */\r\n  OPERATOR_BINARY = 1 << 1,\r\n  /** Is a unary prefix operator overload. */\r\n  OPERATOR_PREFIX = 1 << 2,\r\n  /** Is a unary postfix operator overload. */\r\n  OPERATOR_POSTFIX = 1 << 3,\r\n  /** Is an unmanaged class. */\r\n  UNMANAGED = 1 << 4,\r\n  /** Is a sealed class. */\r\n  SEALED = 1 << 5,\r\n  /** Is always inlined. */\r\n  INLINE = 1 << 6,\r\n  /** Is using a different external name. */\r\n  EXTERNAL = 1 << 7,\r\n  /** Is a builtin. */\r\n  BUILTIN = 1 << 8\r\n}\r\n\r\nexport function decoratorKindToFlag(kind: DecoratorKind): DecoratorFlags {\r\n  switch (kind) {\r\n    case DecoratorKind.GLOBAL: return DecoratorFlags.GLOBAL;\r\n    case DecoratorKind.OPERATOR:\r\n    case DecoratorKind.OPERATOR_BINARY: return DecoratorFlags.OPERATOR_BINARY;\r\n    case DecoratorKind.OPERATOR_PREFIX: return DecoratorFlags.OPERATOR_PREFIX;\r\n    case DecoratorKind.OPERATOR_POSTFIX: return DecoratorFlags.OPERATOR_POSTFIX;\r\n    case DecoratorKind.UNMANAGED: return DecoratorFlags.UNMANAGED;\r\n    case DecoratorKind.SEALED: return DecoratorFlags.SEALED;\r\n    case DecoratorKind.INLINE: return DecoratorFlags.INLINE;\r\n    case DecoratorKind.EXTERNAL: return DecoratorFlags.EXTERNAL;\r\n    case DecoratorKind.BUILTIN: return DecoratorFlags.BUILTIN;\r\n    default: return DecoratorFlags.NONE;\r\n  }\r\n}\r\n\r\n/** Base class of all program elements. */\r\nexport abstract class Element {\r\n\r\n  /** Specific element kind. */\r\n  kind: ElementKind;\r\n  /** Containing {@link Program}. */\r\n  program: Program;\r\n  /** Simple name. */\r\n  simpleName: string;\r\n  /** Internal name referring to this element. */\r\n  internalName: string;\r\n  /** Common flags indicating specific traits. */\r\n  flags: CommonFlags = CommonFlags.NONE;\r\n  /** Decorator flags indicating annotated traits. */\r\n  decoratorFlags: DecoratorFlags = DecoratorFlags.NONE;\r\n  /** Namespaced member elements. */\r\n  members: Map<string,Element> | null = null;\r\n  /** Parent element, if applicable. */\r\n  parent: Element | null = null;\r\n\r\n  /** Constructs a new element, linking it to its containing {@link Program}. */\r\n  protected constructor(program: Program, simpleName: string, internalName: string) {\r\n    this.program = program;\r\n    this.simpleName = simpleName;\r\n    this.internalName = internalName;\r\n  }\r\n\r\n  /** Tests if this element has a specific flag or flags. */\r\n  is(flag: CommonFlags): bool { return (this.flags & flag) == flag; }\r\n  /** Tests if this element has any of the specified flags. */\r\n  isAny(flags: CommonFlags): bool { return (this.flags & flags) != 0; }\r\n  /** Sets a specific flag or flags. */\r\n  set(flag: CommonFlags): void { this.flags |= flag; }\r\n  /** Tests if this element has a specific decorator flag or flags. */\r\n  hasDecorator(flag: DecoratorFlags): bool { return (this.decoratorFlags & flag) == flag; }\r\n}\r\n\r\n/** A filespace representing the implicit top-level namespace of a source. */\r\nexport class Filespace extends Element {\r\n\r\n  kind = ElementKind.FILESPACE;\r\n\r\n  /** File members (externally visible only). */\r\n  members: Map<string,Element>; // more specific\r\n\r\n  /** Constructs a new filespace. */\r\n  constructor(\r\n    program: Program,\r\n    source: Source\r\n  ) {\r\n    super(program, source.internalPath, FILESPACE_PREFIX + source.internalPath);\r\n    this.members = new Map();\r\n  }\r\n}\r\n\r\n/** A namespace that differs from a filespace in being user-declared with a name. */\r\nexport class Namespace extends Element {\r\n\r\n  // All elements have namespace semantics. This is an explicitly declared one.\r\n  kind = ElementKind.NAMESPACE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: NamespaceDeclaration; // more specific\r\n\r\n  /** Constructs a new namespace. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: NamespaceDeclaration\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n  }\r\n}\r\n\r\n/** An enum. */\r\nexport class Enum extends Element {\r\n\r\n  kind = ElementKind.ENUM;\r\n\r\n  /** Declaration reference. */\r\n  declaration: EnumDeclaration;\r\n\r\n  /** Constructs a new enum. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: EnumDeclaration\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n  }\r\n}\r\n\r\n/** An enum value. */\r\nexport class EnumValue extends Element {\r\n\r\n  kind = ElementKind.ENUMVALUE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: EnumValueDeclaration;\r\n  /** Constant value, if applicable. */\r\n  constantValue: i32 = 0;\r\n\r\n  constructor(\r\n    enm: Enum,\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: EnumValueDeclaration\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.parent = enm;\r\n    this.declaration = declaration;\r\n  }\r\n}\r\n\r\nexport const enum ConstantValueKind {\r\n  NONE,\r\n  INTEGER,\r\n  FLOAT\r\n}\r\n\r\nexport class VariableLikeElement extends Element {\r\n\r\n  // kind varies\r\n\r\n  /** Declaration reference. */\r\n  declaration: VariableLikeDeclarationStatement | null;\r\n  /** Variable type. Is {@link Type.void} for type-inferred {@link Global}s before compilation. */\r\n  type: Type;\r\n  /** Constant value kind. */\r\n  constantValueKind: ConstantValueKind = ConstantValueKind.NONE;\r\n  /** Constant integer value, if applicable. */\r\n  constantIntegerValue: I64;\r\n  /** Constant float value, if applicable. */\r\n  constantFloatValue: f64;\r\n\r\n  protected constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    type: Type,\r\n    declaration: VariableLikeDeclarationStatement | null\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.type = type;\r\n    this.declaration = declaration;\r\n  }\r\n\r\n  withConstantIntegerValue(value: I64): this {\r\n    this.constantValueKind = ConstantValueKind.INTEGER;\r\n    this.constantIntegerValue = value;\r\n    this.set(CommonFlags.CONST | CommonFlags.INLINED);\r\n    return this;\r\n  }\r\n\r\n  withConstantFloatValue(value: f64): this {\r\n    this.constantValueKind = ConstantValueKind.FLOAT;\r\n    this.constantFloatValue = value;\r\n    this.set(CommonFlags.CONST | CommonFlags.INLINED);\r\n    return this;\r\n  }\r\n}\r\n\r\n/** A global variable. */\r\nexport class Global extends VariableLikeElement {\r\n\r\n  kind = ElementKind.GLOBAL;\r\n\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    type: Type,\r\n    declaration: VariableLikeDeclarationStatement | null,\r\n    decoratorFlags: DecoratorFlags\r\n  ) {\r\n    super(program, simpleName, internalName, type, declaration);\r\n    this.flags = declaration ? declaration.flags : CommonFlags.NONE;\r\n    this.decoratorFlags = decoratorFlags;\r\n    this.type = type; // resolved later if `void`\r\n  }\r\n}\r\n\r\n/** A function parameter. */\r\nexport class Parameter {\r\n\r\n  // not an Element on its own\r\n\r\n  /** Parameter name. */\r\n  name: string;\r\n  /** Parameter type. */\r\n  type: Type;\r\n  /** Parameter initializer. */\r\n  initializer: Expression | null;\r\n\r\n  /** Constructs a new function parameter. */\r\n  constructor(name: string, type: Type, initializer: Expression | null = null) {\r\n    this.name = name;\r\n    this.type = type;\r\n    this.initializer = initializer;\r\n  }\r\n}\r\n\r\n/** A function local. */\r\nexport class Local extends VariableLikeElement {\r\n\r\n  kind = ElementKind.LOCAL;\r\n\r\n  /** Local index. */\r\n  index: i32;\r\n  /** Respective scoped global, if any. */\r\n  scopedGlobal: Global | null = null;\r\n\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    index: i32,\r\n    type: Type,\r\n    declaration: VariableLikeDeclarationStatement | null = null\r\n  ) {\r\n    super(program, simpleName, simpleName, type, declaration);\r\n    this.index = index;\r\n  }\r\n}\r\n\r\n/** A yet unresolved function prototype. */\r\nexport class FunctionPrototype extends Element {\r\n\r\n  kind = ElementKind.FUNCTION_PROTOTYPE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: FunctionDeclaration;\r\n  /** If an instance method, the class prototype reference. */\r\n  classPrototype: ClassPrototype | null;\r\n  /** Resolved instances. */\r\n  instances: Map<string,Function> = new Map();\r\n  /** Class type arguments, if a partially resolved method of a generic class. Not set otherwise. */\r\n  classTypeArguments: Type[] | null = null;\r\n  /** Operator kind, if an overload. */\r\n  operatorKind: OperatorKind = OperatorKind.INVALID;\r\n\r\n  /** Constructs a new function prototype. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: FunctionDeclaration,\r\n    classPrototype: ClassPrototype | null = null,\r\n    decoratorFlags: DecoratorFlags = DecoratorFlags.NONE\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n    this.classPrototype = classPrototype;\r\n    this.decoratorFlags = decoratorFlags;\r\n  }\r\n\r\n  toString(): string { return this.simpleName; }\r\n}\r\n\r\n/** A resolved function. */\r\nexport class Function extends Element {\r\n\r\n  kind = ElementKind.FUNCTION;\r\n\r\n  /** Prototype reference. */\r\n  prototype: FunctionPrototype;\r\n  /** Function signature. */\r\n  signature: Signature;\r\n  /** Map of locals by name. */\r\n  localsByName: Map<string,Local> = new Map();\r\n  /** Array of locals by index. */\r\n  localsByIndex: Local[] = [];\r\n  /** List of additional non-parameter locals. */\r\n  additionalLocals: Type[] = [];\r\n  /** Current break context label. */\r\n  breakContext: string | null = null;\r\n  /** Contextual type arguments. */\r\n  contextualTypeArguments: Map<string,Type> | null;\r\n  /** Current control flow. */\r\n  flow: Flow;\r\n  /** Remembered debug locations. */\r\n  debugLocations: Range[] = [];\r\n  /** Function reference, if compiled. */\r\n  ref: FunctionRef = 0;\r\n  /** Function table index, if any. */\r\n  functionTableIndex: i32 = -1;\r\n  /** Trampoline function for calling with omitted arguments. */\r\n  trampoline: Function | null = null;\r\n  /** The outer scope, if a function expression. */\r\n  outerScope: Flow | null = null;\r\n\r\n  private nextBreakId: i32 = 0;\r\n  private breakStack: i32[] | null = null;\r\n  nextInlineId: i32 = 0;\r\n\r\n  /** Constructs a new concrete function. */\r\n  constructor(\r\n    prototype: FunctionPrototype,\r\n    internalName: string,\r\n    signature: Signature,\r\n    parent: Element | null = null,\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ) {\r\n    super(prototype.program, prototype.simpleName, internalName);\r\n    this.prototype = prototype;\r\n    this.signature = signature;\r\n    this.parent = parent;\r\n    this.flags = prototype.flags;\r\n    this.decoratorFlags = prototype.decoratorFlags;\r\n    this.contextualTypeArguments = contextualTypeArguments;\r\n    if (!(prototype.is(CommonFlags.AMBIENT))) {\r\n      let localIndex = 0;\r\n      if (parent && parent.kind == ElementKind.CLASS) {\r\n        assert(this.is(CommonFlags.INSTANCE));\r\n        let local = new Local(\r\n          prototype.program,\r\n          \"this\",\r\n          localIndex++,\r\n          assert(signature.thisType)\r\n        );\r\n        this.localsByName.set(\"this\", local);\r\n        this.localsByIndex[local.index] = local;\r\n        let inheritedTypeArguments = (<Class>parent).contextualTypeArguments;\r\n        if (inheritedTypeArguments) {\r\n          if (!this.contextualTypeArguments) this.contextualTypeArguments = new Map();\r\n          for (let [inheritedName, inheritedType] of inheritedTypeArguments) {\r\n            if (!this.contextualTypeArguments.has(inheritedName)) {\r\n              this.contextualTypeArguments.set(inheritedName, inheritedType);\r\n            }\r\n          }\r\n        }\r\n      } else {\r\n        assert(!this.is(CommonFlags.INSTANCE)); // internal error\r\n      }\r\n      let parameterTypes = signature.parameterTypes;\r\n      for (let i = 0, k = parameterTypes.length; i < k; ++i) {\r\n        let parameterType = parameterTypes[i];\r\n        let parameterName = signature.getParameterName(i);\r\n        let local = new Local(\r\n          prototype.program,\r\n          parameterName,\r\n          localIndex++,\r\n          parameterType\r\n          // FIXME: declaration?\r\n        );\r\n        this.localsByName.set(parameterName, local);\r\n        this.localsByIndex[local.index] = local;\r\n      }\r\n    }\r\n    this.flow = Flow.create(this);\r\n  }\r\n\r\n  /** Adds a local of the specified type, with an optional name. */\r\n  addLocal(type: Type, name: string | null = null, declaration: VariableDeclaration | null = null): Local {\r\n    // if it has a name, check previously as this method will throw otherwise\r\n    var localIndex = this.signature.parameterTypes.length + this.additionalLocals.length;\r\n    if (this.is(CommonFlags.INSTANCE)) ++localIndex;\r\n    var local = new Local(\r\n      this.prototype.program,\r\n      name\r\n        ? name\r\n        : \"var$\" + localIndex.toString(10),\r\n      localIndex,\r\n      type,\r\n      declaration\r\n    );\r\n    if (name) {\r\n      if (this.localsByName.has(name)) throw new Error(\"duplicate local name\");\r\n      this.localsByName.set(name, local);\r\n    }\r\n    this.localsByIndex[local.index] = local;\r\n    this.additionalLocals.push(type);\r\n    return local;\r\n  }\r\n\r\n  private tempI32s: Local[] | null = null;\r\n  private tempI64s: Local[] | null = null;\r\n  private tempF32s: Local[] | null = null;\r\n  private tempF64s: Local[] | null = null;\r\n\r\n  /** Gets a free temporary local of the specified type. */\r\n  getTempLocal(type: Type, wrapped: bool = false): Local {\r\n    var temps: Local[] | null;\r\n    switch (type.toNativeType()) {\r\n      case NativeType.I32: {\r\n        temps = this.tempI32s;\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        temps = this.tempI64s;\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        temps = this.tempF32s;\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        temps = this.tempF64s;\r\n        break;\r\n      }\r\n      default: throw new Error(\"concrete type expected\");\r\n    }\r\n    var local: Local;\r\n    if (temps && temps.length) {\r\n      local = temps.pop();\r\n      local.type = type;\r\n      local.flags = CommonFlags.NONE;\r\n    } else {\r\n      local = this.addLocal(type);\r\n    }\r\n    if (type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n      this.flow.setLocalWrapped(local.index, wrapped);\r\n    }\r\n    return local;\r\n  }\r\n\r\n  /** Frees the temporary local for reuse. */\r\n  freeTempLocal(local: Local): void {\r\n    if (local.is(CommonFlags.INLINED)) return;\r\n    assert(local.index >= 0);\r\n    var temps: Local[];\r\n    assert(local.type != null); // internal error\r\n    switch ((<Type>local.type).toNativeType()) {\r\n      case NativeType.I32: {\r\n        temps = this.tempI32s || (this.tempI32s = []);\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        temps = this.tempI64s || (this.tempI64s = []);\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        temps = this.tempF32s || (this.tempF32s = []);\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        temps = this.tempF64s || (this.tempF64s = []);\r\n        break;\r\n      }\r\n      default: throw new Error(\"concrete type expected\");\r\n    }\r\n    assert(local.index >= 0);\r\n    temps.push(local);\r\n  }\r\n\r\n  /** Gets and immediately frees a temporary local of the specified type. */\r\n  getAndFreeTempLocal(type: Type, wrapped: bool): Local {\r\n    var temps: Local[];\r\n    switch (type.toNativeType()) {\r\n      case NativeType.I32: {\r\n        temps = this.tempI32s || (this.tempI32s = []);\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        temps = this.tempI64s || (this.tempI64s = []);\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        temps = this.tempF32s || (this.tempF32s = []);\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        temps = this.tempF64s || (this.tempF64s = []);\r\n        break;\r\n      }\r\n      default: throw new Error(\"concrete type expected\");\r\n    }\r\n    var local: Local;\r\n    if (temps.length) {\r\n      local = temps[temps.length - 1];\r\n      local.type = type;\r\n    } else {\r\n      local = this.addLocal(type);\r\n      temps.push(local);\r\n    }\r\n    if (type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n      this.flow.setLocalWrapped(local.index, wrapped);\r\n    }\r\n    return local;\r\n  }\r\n\r\n  /** Enters a(nother) break context. */\r\n  enterBreakContext(): string {\r\n    var id = this.nextBreakId++;\r\n    if (!this.breakStack) this.breakStack = [ id ];\r\n    else this.breakStack.push(id);\r\n    return this.breakContext = id.toString(10);\r\n  }\r\n\r\n  /** Leaves the current break context. */\r\n  leaveBreakContext(): void {\r\n    assert(this.breakStack != null);\r\n    var length = (<i32[]>this.breakStack).length;\r\n    assert(length > 0);\r\n    (<i32[]>this.breakStack).pop();\r\n    if (length > 1) {\r\n      this.breakContext = (<i32[]>this.breakStack)[length - 2].toString(10);\r\n    } else {\r\n      this.breakContext = null;\r\n      this.breakStack = null;\r\n    }\r\n  }\r\n\r\n  /** Finalizes the function once compiled, releasing no longer needed resources. */\r\n  finalize(module: Module, ref: FunctionRef): void {\r\n    this.ref = ref;\r\n    assert(!this.breakStack || !this.breakStack.length); // internal error\r\n    this.breakStack = null;\r\n    this.breakContext = null;\r\n    this.tempI32s = this.tempI64s = this.tempF32s = this.tempF64s = null;\r\n    if (this.program.options.sourceMap) {\r\n      let debugLocations = this.debugLocations;\r\n      for (let i = 0, k = debugLocations.length; i < k; ++i) {\r\n        let debugLocation = debugLocations[i];\r\n        module.setDebugLocation(\r\n          ref,\r\n          debugLocation.debugInfoRef,\r\n          debugLocation.source.debugInfoIndex,\r\n          debugLocation.line,\r\n          debugLocation.column\r\n        );\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Returns the TypeScript representation of this function. */\r\n  toString(): string { return this.prototype.simpleName; }\r\n}\r\n\r\n/** A resolved function target, that is a function called indirectly by an index and signature. */\r\nexport class FunctionTarget extends Element {\r\n\r\n  kind = ElementKind.FUNCTION_TARGET;\r\n\r\n  /** Underlying signature. */\r\n  signature: Signature;\r\n  /** Function type. */\r\n  type: Type;\r\n\r\n  /** Constructs a new function target. */\r\n  constructor(program: Program, signature: Signature) {\r\n    super(program, \"\", \"\");\r\n    var simpleName = signature.toSignatureString();\r\n    this.simpleName = simpleName;\r\n    this.internalName = simpleName;\r\n    this.signature = signature;\r\n    this.type = Type.u32.asFunction(signature);\r\n  }\r\n}\r\n\r\n/** A yet unresolved instance field prototype. */\r\nexport class FieldPrototype extends Element {\r\n\r\n  kind = ElementKind.FIELD_PROTOTYPE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: FieldDeclaration;\r\n  /** Parent class prototype. */\r\n  classPrototype: ClassPrototype;\r\n\r\n  /** Constructs a new field prototype. */\r\n  constructor(\r\n    classPrototype: ClassPrototype,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: FieldDeclaration\r\n  ) {\r\n    super(classPrototype.program, simpleName, internalName);\r\n    this.classPrototype = classPrototype;\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n  }\r\n}\r\n\r\n/** A resolved instance field. */\r\nexport class Field extends VariableLikeElement {\r\n\r\n  kind = ElementKind.FIELD;\r\n\r\n  /** Field prototype reference. */\r\n  prototype: FieldPrototype;\r\n  /** Field memory offset, if an instance field. */\r\n  memoryOffset: i32 = -1;\r\n\r\n  /** Constructs a new field. */\r\n  constructor(\r\n    prototype: FieldPrototype,\r\n    internalName: string,\r\n    type: Type,\r\n    declaration: FieldDeclaration,\r\n    parent: Class\r\n  ) {\r\n    super(prototype.program, prototype.simpleName, internalName, type, declaration);\r\n    this.prototype = prototype;\r\n    this.flags = prototype.flags;\r\n    this.type = type;\r\n    this.parent = parent;\r\n  }\r\n}\r\n\r\n/** A property comprised of a getter and a setter function. */\r\nexport class Property extends Element {\r\n\r\n  kind = ElementKind.PROPERTY;\r\n\r\n  /** Parent class prototype. */\r\n  parent: ClassPrototype;\r\n  /** Getter prototype. */\r\n  getterPrototype: FunctionPrototype | null = null;\r\n  /** Setter prototype. */\r\n  setterPrototype: FunctionPrototype | null = null;\r\n\r\n  /** Constructs a new property prototype. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    parent: ClassPrototype\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.parent = parent;\r\n  }\r\n}\r\n\r\n/** A yet unresolved class prototype. */\r\nexport class ClassPrototype extends Element {\r\n\r\n  kind = ElementKind.CLASS_PROTOTYPE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: ClassDeclaration;\r\n  /** Resolved instances. */\r\n  instances: Map<string,Class> = new Map();\r\n  /** Instance member prototypes. */\r\n  instanceMembers: Map<string,Element> | null = null;\r\n  /** Base class prototype, if applicable. */\r\n  basePrototype: ClassPrototype | null = null; // set in Program#initialize\r\n  /** Constructor prototype. */\r\n  constructorPrototype: FunctionPrototype | null = null;\r\n  /** Operator overload prototypes. */\r\n  overloadPrototypes: Map<OperatorKind, FunctionPrototype> = new Map();\r\n\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: ClassDeclaration,\r\n    decoratorFlags: DecoratorFlags\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n    this.decoratorFlags = decoratorFlags;\r\n  }\r\n\r\n  toString(): string {\r\n    return this.simpleName;\r\n  }\r\n}\r\n\r\n/** A resolved class. */\r\nexport class Class extends Element {\r\n\r\n  kind = ElementKind.CLASS;\r\n\r\n  /** Prototype reference. */\r\n  prototype: ClassPrototype;\r\n  /** Resolved type arguments. */\r\n  typeArguments: Type[] | null;\r\n  /** Resolved class type. */\r\n  type: Type;\r\n  /** Base class, if applicable. */\r\n  base: Class | null;\r\n  /** Contextual type arguments for fields and methods. */\r\n  contextualTypeArguments: Map<string,Type> | null = null;\r\n  /** Current member memory offset. */\r\n  currentMemoryOffset: u32 = 0;\r\n  /** Constructor instance. */\r\n  constructorInstance: Function | null = null;\r\n  /** Operator overloads. */\r\n  overloads: Map<OperatorKind,Function> | null = null;\r\n  /** Function index of the GC hook. */\r\n  gcHookIndex: u32 = <u32>-1;\r\n\r\n  /** Constructs a new class. */\r\n  constructor(\r\n    prototype: ClassPrototype,\r\n    simpleName: string,\r\n    internalName: string,\r\n    typeArguments: Type[] | null = null,\r\n    base: Class | null = null\r\n  ) {\r\n    super(prototype.program, simpleName, internalName);\r\n    this.prototype = prototype;\r\n    this.flags = prototype.flags;\r\n    this.decoratorFlags = prototype.decoratorFlags;\r\n    this.typeArguments = typeArguments;\r\n    this.type = prototype.program.options.usizeType.asClass(this);\r\n    this.base = base;\r\n\r\n    // inherit static members and contextual type arguments from base class\r\n    if (base) {\r\n      let inheritedTypeArguments = base.contextualTypeArguments;\r\n      if (inheritedTypeArguments) {\r\n        if (!this.contextualTypeArguments) this.contextualTypeArguments = new Map();\r\n        for (let [baseName, baseType] of inheritedTypeArguments) {\r\n          this.contextualTypeArguments.set(baseName, baseType);\r\n        }\r\n      }\r\n    }\r\n\r\n    // apply instance-specific contextual type arguments\r\n    var declaration = this.prototype.declaration;\r\n    var i: i32, k: i32;\r\n    if (declaration) { // irrelevant for built-ins\r\n      let typeParameters = declaration.typeParameters;\r\n      if (typeArguments) {\r\n        if ((k = typeArguments.length) != typeParameters.length) {\r\n          throw new Error(\"type argument count mismatch\");\r\n        }\r\n        if (k) {\r\n          if (!this.contextualTypeArguments) this.contextualTypeArguments = new Map();\r\n          for (i = 0; i < k; ++i) {\r\n            this.contextualTypeArguments.set(typeParameters[i].name.text, typeArguments[i]);\r\n          }\r\n        }\r\n      } else if (typeParameters.length) {\r\n        throw new Error(\"type argument count mismatch\");\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Tests if a value of this class type is assignable to a target of the specified class type. */\r\n  isAssignableTo(target: Class): bool {\r\n    var current: Class | null = this;\r\n    do if (current == target) return true;\r\n    while (current = current.base);\r\n    return false;\r\n  }\r\n\r\n  /** Looks up the operator overload of the specified kind. */\r\n  lookupOverload(kind: OperatorKind, unchecked: bool = false): Function | null {\r\n    if (unchecked) {\r\n      switch (kind) {\r\n        case OperatorKind.INDEXED_GET: {\r\n          let uncheckedOverload = this.lookupOverload(OperatorKind.UNCHECKED_INDEXED_GET);\r\n          if (uncheckedOverload) return uncheckedOverload;\r\n          break;\r\n        }\r\n        case OperatorKind.INDEXED_SET: {\r\n          let uncheckedOverload = this.lookupOverload(OperatorKind.UNCHECKED_INDEXED_SET);\r\n          if (uncheckedOverload) return uncheckedOverload;\r\n          break;\r\n        }\r\n        default: assert(false);\r\n      }\r\n    }\r\n    var instance: Class | null = this;\r\n    do {\r\n      let overloads = instance.overloads;\r\n      if (overloads) {\r\n        let overload = overloads.get(kind);\r\n        if (overload) return overload;\r\n      }\r\n    } while (instance = instance.base);\r\n    return null;\r\n  }\r\n\r\n  offsetof(fieldName: string): u32 {\r\n    var members = assert(this.members);\r\n    assert(members.has(fieldName));\r\n    var field = <Element>members.get(fieldName);\r\n    assert(field.kind == ElementKind.FIELD);\r\n    return (<Field>field).memoryOffset;\r\n  }\r\n\r\n  toString(): string {\r\n    return this.simpleName;\r\n  }\r\n}\r\n\r\n/** A yet unresolved interface. */\r\nexport class InterfacePrototype extends ClassPrototype {\r\n\r\n  kind = ElementKind.INTERFACE_PROTOTYPE;\r\n\r\n  /** Declaration reference. */\r\n  declaration: InterfaceDeclaration; // more specific\r\n\r\n  /** Constructs a new interface prototype. */\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: InterfaceDeclaration,\r\n    decoratorFlags: DecoratorFlags\r\n  ) {\r\n    super(program, simpleName, internalName, declaration, decoratorFlags);\r\n  }\r\n}\r\n\r\n/** A resolved interface. */\r\nexport class Interface extends Class {\r\n\r\n  kind = ElementKind.INTERFACE;\r\n\r\n  /** Prototype reference. */\r\n  prototype: InterfacePrototype; // more specific\r\n  /** Base interface, if applcable. */\r\n  base: Interface | null; // more specific\r\n\r\n  /** Constructs a new interface. */\r\n  constructor(\r\n    prototype: InterfacePrototype,\r\n    simpleName: string,\r\n    internalName: string,\r\n    typeArguments: Type[] = [],\r\n    base: Interface | null = null\r\n  ) {\r\n    super(prototype, simpleName, internalName, typeArguments, base);\r\n  }\r\n}\r\n\r\n/** Control flow flags indicating specific conditions. */\r\nexport const enum FlowFlags {\r\n  /** No specific conditions. */\r\n  NONE = 0,\r\n\r\n  // categorical\r\n\r\n  /** This branch always returns. */\r\n  RETURNS = 1 << 0,\r\n  /** This branch always returns a wrapped value. */\r\n  RETURNS_WRAPPED = 1 << 1,\r\n  /** This branch always throws. */\r\n  THROWS = 1 << 2,\r\n  /** This branch always breaks. */\r\n  BREAKS = 1 << 3,\r\n  /** This branch always continues. */\r\n  CONTINUES = 1 << 4,\r\n  /** This branch always allocates. Constructors only. */\r\n  ALLOCATES = 1 << 5,\r\n\r\n  // conditional\r\n\r\n  /** This branch conditionally returns in a child branch. */\r\n  CONDITIONALLY_RETURNS = 1 << 6,\r\n  /** This branch conditionally throws in a child branch. */\r\n  CONDITIONALLY_THROWS = 1 << 7,\r\n  /** This branch conditionally breaks in a child branch. */\r\n  CONDITIONALLY_BREAKS = 1 << 8,\r\n  /** This branch conditionally continues in a child branch. */\r\n  CONDITIONALLY_CONTINUES = 1 << 9,\r\n  /** This branch conditionally allocates in a child branch. Constructors only. */\r\n  CONDITIONALLY_ALLOCATES = 1 << 10,\r\n\r\n  // special\r\n\r\n  /** This branch is part of inlining a function. */\r\n  INLINE_CONTEXT = 1 << 11,\r\n  /** This branch explicitly requests no bounds checking. */\r\n  UNCHECKED_CONTEXT = 1 << 12,\r\n\r\n  // masks\r\n\r\n  /** Any terminating flag. */\r\n  ANY_TERMINATING = FlowFlags.RETURNS\r\n                  | FlowFlags.THROWS\r\n                  | FlowFlags.BREAKS\r\n                  | FlowFlags.CONTINUES,\r\n\r\n  /** Any categorical flag. */\r\n  ANY_CATEGORICAL = FlowFlags.RETURNS\r\n                  | FlowFlags.RETURNS_WRAPPED\r\n                  | FlowFlags.THROWS\r\n                  | FlowFlags.BREAKS\r\n                  | FlowFlags.CONTINUES\r\n                  | FlowFlags.ALLOCATES,\r\n\r\n  /** Any conditional flag. */\r\n  ANY_CONDITIONAL = FlowFlags.CONDITIONALLY_RETURNS\r\n                  | FlowFlags.CONDITIONALLY_THROWS\r\n                  | FlowFlags.CONDITIONALLY_BREAKS\r\n                  | FlowFlags.CONDITIONALLY_CONTINUES\r\n                  | FlowFlags.CONDITIONALLY_ALLOCATES\r\n}\r\n\r\n/** A control flow evaluator. */\r\nexport class Flow {\r\n\r\n  /** Parent flow. */\r\n  parent: Flow | null;\r\n  /** Flow flags indicating specific conditions. */\r\n  flags: FlowFlags;\r\n  /** Function this flow belongs to. */\r\n  currentFunction: Function;\r\n  /** The label we break to when encountering a continue statement. */\r\n  continueLabel: string | null;\r\n  /** The label we break to when encountering a break statement. */\r\n  breakLabel: string | null;\r\n  /** The label we break to when encountering a return statement, when inlining. */\r\n  returnLabel: string | null;\r\n  /** The current return type. */\r\n  returnType: Type;\r\n  /** The current contextual type arguments. */\r\n  contextualTypeArguments: Map<string,Type> | null;\r\n  /** Scoped local variables. */\r\n  scopedLocals: Map<string,Local> | null = null;\r\n  /** Local variable wrap states for the first 64 locals. */\r\n  wrappedLocals: I64;\r\n  /** Local variable wrap states for locals with index >= 64. */\r\n  wrappedLocalsExt: I64[] | null;\r\n\r\n  /** Creates the parent flow of the specified function. */\r\n  static create(currentFunction: Function): Flow {\r\n    var parentFlow = new Flow();\r\n    parentFlow.parent = null;\r\n    parentFlow.flags = FlowFlags.NONE;\r\n    parentFlow.currentFunction = currentFunction;\r\n    parentFlow.continueLabel = null;\r\n    parentFlow.breakLabel = null;\r\n    parentFlow.returnLabel = null;\r\n    parentFlow.returnType = currentFunction.signature.returnType;\r\n    parentFlow.contextualTypeArguments = currentFunction.contextualTypeArguments;\r\n    parentFlow.wrappedLocals = i64_new(0);\r\n    parentFlow.wrappedLocalsExt = null;\r\n    return parentFlow;\r\n  }\r\n\r\n  private constructor() { }\r\n\r\n  /** Tests if this flow has the specified flag or flags. */\r\n  is(flag: FlowFlags): bool { return (this.flags & flag) == flag; }\r\n  /** Tests if this flow has one of the specified flags. */\r\n  isAny(flag: FlowFlags): bool { return (this.flags & flag) != 0; }\r\n  /** Sets the specified flag or flags. */\r\n  set(flag: FlowFlags): void { this.flags |= flag; }\r\n  /** Unsets the specified flag or flags. */\r\n  unset(flag: FlowFlags): void { this.flags &= ~flag; }\r\n\r\n  /** Forks this flow to a child flow. */\r\n  fork(): Flow {\r\n    var branch = new Flow();\r\n    branch.parent = this;\r\n    branch.flags = this.flags;\r\n    branch.currentFunction = this.currentFunction;\r\n    branch.continueLabel = this.continueLabel;\r\n    branch.breakLabel = this.breakLabel;\r\n    branch.returnLabel = this.returnLabel;\r\n    branch.returnType = this.returnType;\r\n    branch.contextualTypeArguments = this.contextualTypeArguments;\r\n    branch.wrappedLocals = this.wrappedLocals;\r\n    branch.wrappedLocalsExt = this.wrappedLocalsExt ? this.wrappedLocalsExt.slice() : null;\r\n    return branch;\r\n  }\r\n\r\n  /** Frees this flow's scoped variables. */\r\n  free(): Flow {\r\n    var parent = assert(this.parent);\r\n    if (this.scopedLocals) { // free block-scoped locals\r\n      for (let scopedLocal of this.scopedLocals.values()) {\r\n        if (scopedLocal.is(CommonFlags.SCOPED)) { // otherwise an alias\r\n          this.currentFunction.freeTempLocal(scopedLocal);\r\n        }\r\n      }\r\n      this.scopedLocals = null;\r\n    }\r\n    return parent;\r\n  }\r\n\r\n  /** Adds a new scoped local of the specified name. */\r\n  addScopedLocal(type: Type, name: string, wrapped: bool, declaration?: VariableDeclaration): Local {\r\n    var scopedLocal = this.currentFunction.getTempLocal(type, false);\r\n    if (!this.scopedLocals) this.scopedLocals = new Map();\r\n    else {\r\n      let existingLocal = this.scopedLocals.get(name);\r\n      if (existingLocal) {\r\n        if (declaration) {\r\n          this.currentFunction.program.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range\r\n          );\r\n        } else assert(false);\r\n        return existingLocal;\r\n      }\r\n    }\r\n    scopedLocal.set(CommonFlags.SCOPED);\r\n    this.scopedLocals.set(name, scopedLocal);\r\n    if (type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n      this.setLocalWrapped(scopedLocal.index, wrapped);\r\n    }\r\n    return scopedLocal;\r\n  }\r\n\r\n  /** Adds a new scoped alias for the specified local. */\r\n  addScopedLocalAlias(index: i32, type: Type, name: string): Local {\r\n    if (!this.scopedLocals) this.scopedLocals = new Map();\r\n    else {\r\n      let existingLocal = this.scopedLocals.get(name);\r\n      if (existingLocal) {\r\n        let declaration = existingLocal.declaration;\r\n        if (declaration) {\r\n          this.currentFunction.program.error(\r\n            DiagnosticCode.Duplicate_identifier_0,\r\n            declaration.name.range\r\n          );\r\n        } else assert(false);\r\n        return existingLocal;\r\n      }\r\n    }\r\n    assert(index < this.currentFunction.localsByIndex.length);\r\n    var scopedAlias = new Local( // not SCOPED as an indicator that it isn't automatically free'd\r\n      this.currentFunction.program,\r\n      name,\r\n      index,\r\n      type,\r\n      null\r\n    );\r\n    this.scopedLocals.set(name, scopedAlias);\r\n    return scopedAlias;\r\n  }\r\n\r\n  /** Gets the local of the specified name in the current scope. */\r\n  getScopedLocal(name: string): Local | null {\r\n    var local: Local | null;\r\n    var current: Flow | null = this;\r\n    do {\r\n      if (current.scopedLocals && (local = current.scopedLocals.get(name))) {\r\n        return local;\r\n      }\r\n    } while (current = current.parent);\r\n    return this.currentFunction.localsByName.get(name);\r\n  }\r\n\r\n  /** Tests if the local with the specified index is considered wrapped. */\r\n  isLocalWrapped(index: i32): bool {\r\n    var map: I64;\r\n    var ext: I64[] | null;\r\n    if (index < 64) {\r\n      if (index < 0) return true; // inlined constant\r\n      map = this.wrappedLocals;\r\n    } else if (ext = this.wrappedLocalsExt) {\r\n      let i = ((index - 64) / 64) | 0;\r\n      if (i >= ext.length) return false;\r\n      map = ext[i];\r\n      index -= (i + 1) * 64;\r\n    } else {\r\n      return false;\r\n    }\r\n    return i64_ne(\r\n      i64_and(\r\n        map,\r\n        i64_shl(\r\n          i64_one,\r\n          i64_new(index)\r\n        )\r\n      ),\r\n      i64_zero\r\n    );\r\n  }\r\n\r\n  /** Sets if the local with the specified index is considered wrapped. */\r\n  setLocalWrapped(index: i32, wrapped: bool): void {\r\n    var map: I64;\r\n    var off: i32 = -1;\r\n    if (index < 64) {\r\n      if (index < 0) return; // inlined constant\r\n      map = this.wrappedLocals;\r\n    } else {\r\n      let ext = this.wrappedLocalsExt;\r\n      off = ((index - 64) / 64) | 0;\r\n      if (!ext) {\r\n        this.wrappedLocalsExt = ext = new Array(off + 1);\r\n        ext.length = 0;\r\n      }\r\n      while (ext.length <= off) ext.push(i64_new(0));\r\n      map = ext[off];\r\n      index -= (off + 1) * 64;\r\n    }\r\n    map = wrapped\r\n      ? i64_or(\r\n          map,\r\n          i64_shl(\r\n            i64_one,\r\n            i64_new(index)\r\n          )\r\n        )\r\n      : i64_and(\r\n          map,\r\n          i64_not(\r\n            i64_shl(\r\n              i64_one,\r\n              i64_new(index)\r\n            )\r\n          )\r\n        );\r\n    if (off >= 0) (<I64[]>this.wrappedLocalsExt)[off] = map;\r\n    else this.wrappedLocals = map;\r\n  }\r\n\r\n  /** Inherits flags and local wrap states from the specified flow (e.g. blocks). */\r\n  inherit(other: Flow): void {\r\n    this.flags |= other.flags & (FlowFlags.ANY_CATEGORICAL | FlowFlags.ANY_CONDITIONAL);\r\n    this.wrappedLocals = other.wrappedLocals;\r\n    this.wrappedLocalsExt = other.wrappedLocalsExt; // no need to slice because other flow is finished\r\n  }\r\n\r\n  /** Inherits categorical flags as conditional flags from the specified flow (e.g. then without else). */\r\n  inheritConditional(other: Flow): void {\r\n    if (other.is(FlowFlags.RETURNS)) {\r\n      this.set(FlowFlags.CONDITIONALLY_RETURNS);\r\n    }\r\n    if (other.is(FlowFlags.THROWS)) {\r\n      this.set(FlowFlags.CONDITIONALLY_THROWS);\r\n    }\r\n    if (other.is(FlowFlags.BREAKS) && other.breakLabel == this.breakLabel) {\r\n      this.set(FlowFlags.CONDITIONALLY_BREAKS);\r\n    }\r\n    if (other.is(FlowFlags.CONTINUES) && other.continueLabel == this.continueLabel) {\r\n      this.set(FlowFlags.CONDITIONALLY_CONTINUES);\r\n    }\r\n    if (other.is(FlowFlags.ALLOCATES)) {\r\n      this.set(FlowFlags.CONDITIONALLY_ALLOCATES);\r\n    }\r\n  }\r\n\r\n  /** Inherits mutual flags and local wrap states from the specified flows (e.g. then with else). */\r\n  inheritMutual(left: Flow, right: Flow): void {\r\n    // categorical flags set in both arms\r\n    this.flags |= left.flags & right.flags & FlowFlags.ANY_CATEGORICAL;\r\n\r\n    // conditional flags set in at least one arm\r\n    this.flags |= left.flags & FlowFlags.ANY_CONDITIONAL;\r\n    this.flags |= right.flags & FlowFlags.ANY_CONDITIONAL;\r\n\r\n    // locals wrapped in both arms\r\n    this.wrappedLocals = i64_and(left.wrappedLocals, right.wrappedLocals);\r\n    var leftExt = left.wrappedLocalsExt;\r\n    var rightExt = right.wrappedLocalsExt;\r\n    if (leftExt != null && rightExt != null) {\r\n      let thisExt = this.wrappedLocalsExt;\r\n      let minLength = min(leftExt.length, rightExt.length);\r\n      if (minLength) {\r\n        if (!thisExt) thisExt = new Array(minLength);\r\n        else while (thisExt.length < minLength) thisExt.push(i64_new(0));\r\n        for (let i = 0; i < minLength; ++i) {\r\n          thisExt[i] = i64_and(\r\n            leftExt[i],\r\n            rightExt[i]\r\n          );\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  /**\r\n   * Tests if an expression can possibly overflow in the context of this flow. Assumes that the\r\n   * expression might already have overflown and returns `false` only if the operation neglects\r\n   * any possibly combination of garbage bits being present.\r\n   */\r\n  canOverflow(expr: ExpressionRef, type: Type): bool {\r\n    // TODO: the following catches most common and a few uncommon cases, but there are additional\r\n    // opportunities here, obviously.\r\n    assert(type != Type.void);\r\n\r\n    // types other than i8, u8, i16, u16 and bool do not overflow\r\n    if (!type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) return false;\r\n\r\n    var operand: ExpressionRef;\r\n    switch (getExpressionId(expr)) {\r\n\r\n      // overflows if the local isn't wrapped or the conversion does\r\n      case ExpressionId.GetLocal: {\r\n        let currentFunction = this.currentFunction;\r\n        let local = currentFunction.localsByIndex[getGetLocalIndex(expr)];\r\n        return !currentFunction.flow.isLocalWrapped(local.index)\r\n            || canConversionOverflow(local.type, type);\r\n      }\r\n\r\n      // overflows if the value does\r\n      case ExpressionId.SetLocal: {\r\n        assert(isTeeLocal(expr));\r\n        return this.canOverflow(getSetLocalValue(expr), type);\r\n      }\r\n\r\n      // never overflows because globals are wrapped on set\r\n      case ExpressionId.GetGlobal: return false;\r\n\r\n      case ExpressionId.Binary: {\r\n        switch (getBinaryOp(expr)) {\r\n\r\n          // comparisons do not overflow (result is 0 or 1)\r\n          case BinaryOp.EqI32:\r\n          case BinaryOp.EqI64:\r\n          case BinaryOp.EqF32:\r\n          case BinaryOp.EqF64:\r\n          case BinaryOp.NeI32:\r\n          case BinaryOp.NeI64:\r\n          case BinaryOp.NeF32:\r\n          case BinaryOp.NeF64:\r\n          case BinaryOp.LtI32:\r\n          case BinaryOp.LtU32:\r\n          case BinaryOp.LtI64:\r\n          case BinaryOp.LtU64:\r\n          case BinaryOp.LtF32:\r\n          case BinaryOp.LtF64:\r\n          case BinaryOp.LeI32:\r\n          case BinaryOp.LeU32:\r\n          case BinaryOp.LeI64:\r\n          case BinaryOp.LeU64:\r\n          case BinaryOp.LeF32:\r\n          case BinaryOp.LeF64:\r\n          case BinaryOp.GtI32:\r\n          case BinaryOp.GtU32:\r\n          case BinaryOp.GtI64:\r\n          case BinaryOp.GtU64:\r\n          case BinaryOp.GtF32:\r\n          case BinaryOp.GtF64:\r\n          case BinaryOp.GeI32:\r\n          case BinaryOp.GeU32:\r\n          case BinaryOp.GeI64:\r\n          case BinaryOp.GeU64:\r\n          case BinaryOp.GeF32:\r\n          case BinaryOp.GeF64: return false;\r\n\r\n          // result won't overflow if one side is 0 or if one side is 1 and the other wrapped\r\n          case BinaryOp.MulI32: {\r\n            return !(\r\n              (\r\n                getExpressionId(operand = getBinaryLeft(expr)) == ExpressionId.Const &&\r\n                (\r\n                  getConstValueI32(operand) == 0 ||\r\n                  (\r\n                    getConstValueI32(operand) == 1 &&\r\n                    !this.canOverflow(getBinaryRight(expr), type)\r\n                  )\r\n                )\r\n              ) || (\r\n                getExpressionId(operand = getBinaryRight(expr)) == ExpressionId.Const &&\r\n                (\r\n                  getConstValueI32(operand) == 0 ||\r\n                  (\r\n                    getConstValueI32(operand) == 1 &&\r\n                    !this.canOverflow(getBinaryLeft(expr), type)\r\n                  )\r\n                )\r\n              )\r\n            );\r\n          }\r\n\r\n          // result won't overflow if one side is a constant less than this type's mask or one side\r\n          // is wrapped\r\n          case BinaryOp.AndI32: {\r\n            // note that computeSmallIntegerMask returns the mask minus the MSB for signed types\r\n            // because signed value garbage bits must be guaranteed to be equal to the MSB.\r\n            return !(\r\n              (\r\n                (\r\n                  getExpressionId(operand = getBinaryLeft(expr)) == ExpressionId.Const &&\r\n                  getConstValueI32(operand) <= type.computeSmallIntegerMask(Type.i32)\r\n                ) || !this.canOverflow(operand, type)\r\n              ) || (\r\n                (\r\n                  getExpressionId(operand = getBinaryRight(expr)) == ExpressionId.Const &&\r\n                  getConstValueI32(operand) <= type.computeSmallIntegerMask(Type.i32)\r\n                ) || !this.canOverflow(operand, type)\r\n              )\r\n            );\r\n          }\r\n\r\n          // overflows if the shift doesn't clear potential garbage bits\r\n          case BinaryOp.ShlI32: {\r\n            let shift = 32 - type.size;\r\n            return getExpressionId(operand = getBinaryRight(expr)) != ExpressionId.Const\r\n                || getConstValueI32(operand) < shift;\r\n          }\r\n\r\n          // overflows if the value does and the shift doesn't clear potential garbage bits\r\n          case BinaryOp.ShrI32: {\r\n            let shift = 32 - type.size;\r\n            return this.canOverflow(getBinaryLeft(expr), type) && (\r\n              getExpressionId(operand = getBinaryRight(expr)) != ExpressionId.Const ||\r\n              getConstValueI32(operand) < shift\r\n            );\r\n          }\r\n\r\n          // overflows if the shift does not clear potential garbage bits. if an unsigned value is\r\n          // wrapped, it can't overflow.\r\n          case BinaryOp.ShrU32: {\r\n            let shift = 32 - type.size;\r\n            return type.is(TypeFlags.SIGNED)\r\n              ? !(\r\n                  getExpressionId(operand = getBinaryRight(expr)) == ExpressionId.Const &&\r\n                  getConstValueI32(operand) > shift // must clear MSB\r\n                )\r\n              : this.canOverflow(getBinaryLeft(expr), type) && !(\r\n                  getExpressionId(operand = getBinaryRight(expr)) == ExpressionId.Const &&\r\n                  getConstValueI32(operand) >= shift // can leave MSB\r\n                );\r\n          }\r\n\r\n          // overflows if any side does\r\n          case BinaryOp.DivU32:\r\n          case BinaryOp.RemI32:\r\n          case BinaryOp.RemU32: {\r\n            return this.canOverflow(getBinaryLeft(expr), type)\r\n                || this.canOverflow(getBinaryRight(expr), type);\r\n          }\r\n        }\r\n        break;\r\n      }\r\n\r\n      case ExpressionId.Unary: {\r\n        switch (getUnaryOp(expr)) {\r\n\r\n          // comparisons do not overflow (result is 0 or 1)\r\n          case UnaryOp.EqzI32:\r\n          case UnaryOp.EqzI64: return false;\r\n\r\n          // overflow if the maximum result (32) cannot be represented in the target type\r\n          case UnaryOp.ClzI32:\r\n          case UnaryOp.CtzI32:\r\n          case UnaryOp.PopcntI32: return type.size < 7;\r\n        }\r\n        break;\r\n      }\r\n\r\n      // overflows if the value cannot be represented in the target type\r\n      case ExpressionId.Const: {\r\n        let value: i32 = 0;\r\n        switch (getExpressionType(expr)) {\r\n          case NativeType.I32: { value = getConstValueI32(expr); break; }\r\n          case NativeType.I64: { value = getConstValueI64Low(expr); break; } // discards upper bits\r\n          case NativeType.F32: { value = i32(getConstValueF32(expr)); break; }\r\n          case NativeType.F64: { value = i32(getConstValueF64(expr)); break; }\r\n          default: assert(false);\r\n        }\r\n        switch (type.kind) {\r\n          case TypeKind.I8: return value < i8.MIN_VALUE || value > i8.MAX_VALUE;\r\n          case TypeKind.I16: return value < i16.MIN_VALUE || value > i16.MAX_VALUE;\r\n          case TypeKind.U8: return value < 0 || value > u8.MAX_VALUE;\r\n          case TypeKind.U16: return value < 0 || value > u16.MAX_VALUE;\r\n          case TypeKind.BOOL: return (value & ~1) != 0;\r\n        }\r\n        break;\r\n      }\r\n\r\n      // overflows if the conversion does\r\n      case ExpressionId.Load: {\r\n        let fromType: Type;\r\n        switch (getLoadBytes(expr)) {\r\n          case 1:  { fromType = isLoadSigned(expr) ? Type.i8 : Type.u8; break; }\r\n          case 2:  { fromType = isLoadSigned(expr) ? Type.i16 : Type.u16; break; }\r\n          default: { fromType = isLoadSigned(expr) ? Type.i32 : Type.u32; break; }\r\n        }\r\n        return canConversionOverflow(fromType, type);\r\n      }\r\n\r\n      // overflows if the result does, which is either\r\n      // - the last expression of the block, by contract, if the block doesn't have a label\r\n      // - the last expression or the value of an inner br if the block has a label (TODO)\r\n      case ExpressionId.Block: {\r\n        if (!getBlockName(expr)) {\r\n          let size = assert(getBlockChildCount(expr));\r\n          let last = getBlockChild(expr, size - 1);\r\n          return this.canOverflow(last, type);\r\n        }\r\n        // actually, brs with a value that'd be handled here is not emitted atm\r\n        break;\r\n      }\r\n\r\n      // overflows if either side does\r\n      case ExpressionId.If: {\r\n        return this.canOverflow(getIfTrue(expr), type)\r\n            || this.canOverflow(assert(getIfFalse(expr)), type);\r\n      }\r\n\r\n      // overflows if either side does\r\n      case ExpressionId.Select: {\r\n        return this.canOverflow(getSelectThen(expr), type)\r\n            || this.canOverflow(getSelectElse(expr), type);\r\n      }\r\n\r\n      // overflows if the call does not return a wrapped value or the conversion does\r\n      case ExpressionId.Call: {\r\n        let program = this.currentFunction.program;\r\n        let instance = assert(program.instancesLookup.get(assert(getCallTarget(expr))));\r\n        assert(instance.kind == ElementKind.FUNCTION);\r\n        let returnType = (<Function>instance).signature.returnType;\r\n        return !(<Function>instance).flow.is(FlowFlags.RETURNS_WRAPPED)\r\n            || canConversionOverflow(returnType, type);\r\n      }\r\n\r\n      // doesn't technically overflow\r\n      case ExpressionId.Unreachable: return false;\r\n    }\r\n    return true;\r\n  }\r\n\r\n  /** Finalizes this flow. Must be the topmost parent flow of the function. */\r\n  finalize(): void {\r\n    assert(this.parent == null); // must be the topmost parent flow\r\n    this.continueLabel = null;\r\n    this.breakLabel = null;\r\n    this.returnLabel = null;\r\n    this.contextualTypeArguments = null;\r\n  }\r\n}\r\n\r\n/** Tests if a conversion from one type to another can technically overflow. */\r\nfunction canConversionOverflow(fromType: Type, toType: Type): bool {\r\n  var fromSize = fromType.byteSize;\r\n  var toSize = toType.byteSize;\r\n  return !fromType.is(TypeFlags.INTEGER) // non-i32 locals or returns\r\n      || fromSize > toSize\r\n      || fromType.is(TypeFlags.SIGNED) != toType.is(TypeFlags.SIGNED);\r\n}\r\n","/**\r\n * A thin wrapper around Binaryen's C-API.\r\n * @module module\r\n *//***/\r\n\r\nimport {\r\n  Target\r\n} from \"./compiler\";\r\n\r\nexport type ModuleRef = usize;\r\nexport type FunctionTypeRef = usize;\r\nexport type FunctionRef = usize;\r\nexport type ExpressionRef = usize;\r\nexport type GlobalRef = usize;\r\nexport type ImportRef = usize;\r\nexport type ExportRef = usize;\r\nexport type Index = u32;\r\n\r\nexport const enum NativeType {\r\n  None = 0,        // _BinaryenTypeNone(),\r\n  I32  = 1,        // _BinaryenTypeInt32(),\r\n  I64  = 2,        // _BinaryenTypeInt64(),\r\n  F32  = 3,        // _BinaryenTypeFloat32(),\r\n  F64  = 4,        // _BinaryenTypeFloat64(),\r\n  Unreachable = 5, // _BinaryenTypeUnreachable(),\r\n  Auto = -1        // _BinaryenTypeAuto()\r\n}\r\n\r\nexport enum ExpressionId {\r\n  Invalid = _BinaryenInvalidId(),\r\n  Block = _BinaryenBlockId(),\r\n  If = _BinaryenIfId(),\r\n  Loop = _BinaryenLoopId(),\r\n  Break = _BinaryenBreakId(),\r\n  Switch = _BinaryenSwitchId(),\r\n  Call = _BinaryenCallId(),\r\n  CallImport = _BinaryenCallImportId(),\r\n  CallIndirect = _BinaryenCallIndirectId(),\r\n  GetLocal = _BinaryenGetLocalId(),\r\n  SetLocal = _BinaryenSetLocalId(),\r\n  GetGlobal = _BinaryenGetGlobalId(),\r\n  SetGlobal = _BinaryenSetGlobalId(),\r\n  Load = _BinaryenLoadId(),\r\n  Store = _BinaryenStoreId(),\r\n  Const = _BinaryenConstId(),\r\n  Unary = _BinaryenUnaryId(),\r\n  Binary = _BinaryenBinaryId(),\r\n  Select = _BinaryenSelectId(),\r\n  Drop = _BinaryenDropId(),\r\n  Return = _BinaryenReturnId(),\r\n  Host = _BinaryenHostId(),\r\n  Nop = _BinaryenNopId(),\r\n  Unreachable = _BinaryenUnreachableId(),\r\n  AtomicCmpxchg = _BinaryenAtomicCmpxchgId(),\r\n  AtomicRMW = _BinaryenAtomicRMWId(),\r\n  AtomicWait = _BinaryenAtomicWaitId(),\r\n  AtomicWake = _BinaryenAtomicWakeId()\r\n}\r\n\r\nexport enum UnaryOp {\r\n  ClzI32 = _BinaryenClzInt32(),\r\n  CtzI32 = _BinaryenCtzInt32(),\r\n  PopcntI32 = _BinaryenPopcntInt32(),\r\n  NegF32 = _BinaryenNegFloat32(),\r\n  AbsF32 = _BinaryenAbsFloat32(),\r\n  CeilF32 = _BinaryenCeilFloat32(),\r\n  FloorF32 = _BinaryenFloorFloat32(),\r\n  TruncF32 = _BinaryenTruncFloat32(),\r\n  NearestF32 = _BinaryenNearestFloat32(),\r\n  SqrtF32 = _BinaryenSqrtFloat32(),\r\n  EqzI32 = _BinaryenEqZInt32(),\r\n  ClzI64 = _BinaryenClzInt64(),\r\n  CtzI64 = _BinaryenCtzInt64(),\r\n  PopcntI64 = _BinaryenPopcntInt64(),\r\n  NegF64 = _BinaryenNegFloat64(),\r\n  AbsF64 = _BinaryenAbsFloat64(),\r\n  CeilF64 = _BinaryenCeilFloat64(),\r\n  FloorF64 = _BinaryenFloorFloat64(),\r\n  TruncF64 = _BinaryenTruncFloat64(),\r\n  NearestF64 = _BinaryenNearestFloat64(),\r\n  SqrtF64 = _BinaryenSqrtFloat64(),\r\n  EqzI64 = _BinaryenEqZInt64(),\r\n  ExtendI32 = _BinaryenExtendSInt32(),\r\n  ExtendU32 = _BinaryenExtendUInt32(),\r\n  WrapI64 = _BinaryenWrapInt64(),\r\n  TruncF32ToI32 = _BinaryenTruncSFloat32ToInt32(),\r\n  TruncF32ToI64 = _BinaryenTruncSFloat32ToInt64(),\r\n  TruncF32ToU32 = _BinaryenTruncUFloat32ToInt32(),\r\n  TruncF32ToU64 = _BinaryenTruncUFloat32ToInt64(),\r\n  TruncF64ToI32 = _BinaryenTruncSFloat64ToInt32(),\r\n  TruncF64ToI64 = _BinaryenTruncSFloat64ToInt64(),\r\n  TruncF64ToU32 = _BinaryenTruncUFloat64ToInt32(),\r\n  TruncF64ToU64 = _BinaryenTruncUFloat64ToInt64(),\r\n  ReinterpretF32 = _BinaryenReinterpretFloat32(),\r\n  ReinterpretF64 = _BinaryenReinterpretFloat64(),\r\n  ConvertI32ToF32 = _BinaryenConvertSInt32ToFloat32(),\r\n  ConvertI32ToF64 = _BinaryenConvertSInt32ToFloat64(),\r\n  ConvertU32ToF32 = _BinaryenConvertUInt32ToFloat32(),\r\n  ConvertU32ToF64 = _BinaryenConvertUInt32ToFloat64(),\r\n  ConvertI64ToF32 = _BinaryenConvertSInt64ToFloat32(),\r\n  ConvertI64ToF64 = _BinaryenConvertSInt64ToFloat64(),\r\n  ConvertU64ToF32 = _BinaryenConvertUInt64ToFloat32(),\r\n  ConvertU64ToF64 = _BinaryenConvertUInt64ToFloat64(),\r\n  PromoteF32 = _BinaryenPromoteFloat32(),\r\n  DemoteF64 = _BinaryenDemoteFloat64(),\r\n  ReinterpretI32 = _BinaryenReinterpretInt32(),\r\n  ReinterpretI64 = _BinaryenReinterpretInt64(),\r\n\r\n  // see: https://github.com/WebAssembly/sign-extension-ops\r\n  ExtendI8ToI32 = _BinaryenExtendS8Int32(),\r\n  ExtendI16ToI32 = _BinaryenExtendS16Int32(),\r\n  ExtendI8ToI64 = _BinaryenExtendS8Int64(),\r\n  ExtendI16ToI64 = _BinaryenExtendS16Int64(),\r\n  ExtendI32ToI64 = _BinaryenExtendS32Int64()\r\n\r\n  // see: https://github.com/WebAssembly/nontrapping-float-to-int-conversions\r\n  // TruncF32ToI32Sat\r\n  // TruncF32ToU32Sat\r\n  // TruncF64ToI32Sat\r\n  // TruncF64ToU32Sat\r\n  // TruncF32ToI64Sat\r\n  // TruncF32ToU64Sat\r\n  // TruncF64ToI64Sat\r\n  // TruncF64ToU64Sat\r\n}\r\n\r\nexport enum BinaryOp {\r\n  AddI32 = _BinaryenAddInt32(),\r\n  SubI32 = _BinaryenSubInt32(),\r\n  MulI32 = _BinaryenMulInt32(),\r\n  DivI32 = _BinaryenDivSInt32(),\r\n  DivU32 = _BinaryenDivUInt32(),\r\n  RemI32 = _BinaryenRemSInt32(),\r\n  RemU32 = _BinaryenRemUInt32(),\r\n  AndI32 = _BinaryenAndInt32(),\r\n  OrI32 = _BinaryenOrInt32(),\r\n  XorI32 = _BinaryenXorInt32(),\r\n  ShlI32 = _BinaryenShlInt32(),\r\n  ShrU32 = _BinaryenShrUInt32(),\r\n  ShrI32 = _BinaryenShrSInt32(),\r\n  RotlI32 = _BinaryenRotLInt32(),\r\n  RotrI32 = _BinaryenRotRInt32(),\r\n  EqI32 = _BinaryenEqInt32(),\r\n  NeI32 = _BinaryenNeInt32(),\r\n  LtI32 = _BinaryenLtSInt32(),\r\n  LtU32 = _BinaryenLtUInt32(),\r\n  LeI32 = _BinaryenLeSInt32(),\r\n  LeU32 = _BinaryenLeUInt32(),\r\n  GtI32 = _BinaryenGtSInt32(),\r\n  GtU32 = _BinaryenGtUInt32(),\r\n  GeI32 = _BinaryenGeSInt32(),\r\n  GeU32 = _BinaryenGeUInt32(),\r\n  AddI64 = _BinaryenAddInt64(),\r\n  SubI64 = _BinaryenSubInt64(),\r\n  MulI64 = _BinaryenMulInt64(),\r\n  DivI64 = _BinaryenDivSInt64(),\r\n  DivU64 = _BinaryenDivUInt64(),\r\n  RemI64 = _BinaryenRemSInt64(),\r\n  RemU64 = _BinaryenRemUInt64(),\r\n  AndI64 = _BinaryenAndInt64(),\r\n  OrI64 = _BinaryenOrInt64(),\r\n  XorI64 = _BinaryenXorInt64(),\r\n  ShlI64 = _BinaryenShlInt64(),\r\n  ShrU64 = _BinaryenShrUInt64(),\r\n  ShrI64 = _BinaryenShrSInt64(),\r\n  RotlI64 = _BinaryenRotLInt64(),\r\n  RotrI64 = _BinaryenRotRInt64(),\r\n  EqI64 = _BinaryenEqInt64(),\r\n  NeI64 = _BinaryenNeInt64(),\r\n  LtI64 = _BinaryenLtSInt64(),\r\n  LtU64 = _BinaryenLtUInt64(),\r\n  LeI64 = _BinaryenLeSInt64(),\r\n  LeU64 = _BinaryenLeUInt64(),\r\n  GtI64 = _BinaryenGtSInt64(),\r\n  GtU64 = _BinaryenGtUInt64(),\r\n  GeI64 = _BinaryenGeSInt64(),\r\n  GeU64 = _BinaryenGeUInt64(),\r\n  AddF32 = _BinaryenAddFloat32(),\r\n  SubF32 = _BinaryenSubFloat32(),\r\n  MulF32 = _BinaryenMulFloat32(),\r\n  DivF32 = _BinaryenDivFloat32(),\r\n  CopysignF32 = _BinaryenCopySignFloat32(),\r\n  MinF32 = _BinaryenMinFloat32(),\r\n  MaxF32 = _BinaryenMaxFloat32(),\r\n  EqF32 = _BinaryenEqFloat32(),\r\n  NeF32 = _BinaryenNeFloat32(),\r\n  LtF32 = _BinaryenLtFloat32(),\r\n  LeF32 = _BinaryenLeFloat32(),\r\n  GtF32 = _BinaryenGtFloat32(),\r\n  GeF32 = _BinaryenGeFloat32(),\r\n  AddF64 = _BinaryenAddFloat64(),\r\n  SubF64 = _BinaryenSubFloat64(),\r\n  MulF64 = _BinaryenMulFloat64(),\r\n  DivF64 = _BinaryenDivFloat64(),\r\n  CopysignF64 = _BinaryenCopySignFloat64(),\r\n  MinF64 = _BinaryenMinFloat64(),\r\n  MaxF64 = _BinaryenMaxFloat64(),\r\n  EqF64 = _BinaryenEqFloat64(),\r\n  NeF64 = _BinaryenNeFloat64(),\r\n  LtF64 = _BinaryenLtFloat64(),\r\n  LeF64 = _BinaryenLeFloat64(),\r\n  GtF64 = _BinaryenGtFloat64(),\r\n  GeF64 = _BinaryenGeFloat64()\r\n}\r\n\r\nexport enum HostOp {\r\n  PageSize = _BinaryenPageSize(),\r\n  CurrentMemory = _BinaryenCurrentMemory(),\r\n  GrowMemory = _BinaryenGrowMemory(),\r\n  HasFeature = _BinaryenHasFeature(),\r\n\r\n  // see: https://github.com/WebAssembly/bulk-memory-operations\r\n  // MoveMemory\r\n  // SetMemory\r\n}\r\n\r\nexport enum AtomicRMWOp {\r\n  Add = _BinaryenAtomicRMWAdd(),\r\n  Sub = _BinaryenAtomicRMWSub(),\r\n  And = _BinaryenAtomicRMWAnd(),\r\n  Or = _BinaryenAtomicRMWOr(),\r\n  Xor = _BinaryenAtomicRMWXor(),\r\n  Xchg = _BinaryenAtomicRMWXchg()\r\n}\r\n\r\nexport class MemorySegment {\r\n\r\n  buffer: Uint8Array;\r\n  offset: I64;\r\n\r\n  static create(buffer: Uint8Array, offset: I64): MemorySegment {\r\n    var segment = new MemorySegment();\r\n    segment.buffer = buffer;\r\n    segment.offset = offset;\r\n    return segment;\r\n  }\r\n}\r\n\r\nexport class Module {\r\n\r\n  ref: ModuleRef;\r\n\r\n  private cachedByValue: usize;\r\n\r\n  /** Maximum number of pages when targeting WASM32. */\r\n  static readonly MAX_MEMORY_WASM32: Index = 0xffff;\r\n\r\n  /** Maximum number of pages when targeting WASM64. */\r\n  static readonly MAX_MEMORY_WASM64: Index = 0xffff; // TODO\r\n\r\n  static create(): Module {\r\n    var module = new Module();\r\n    module.ref = _BinaryenModuleCreate();\r\n    module.cachedByValue = memory.allocate(16);\r\n    return module;\r\n  }\r\n\r\n  static createFrom(buffer: Uint8Array): Module {\r\n    var cArr = allocU8Array(buffer);\r\n    try {\r\n      let module = new Module();\r\n      module.ref = _BinaryenModuleRead(cArr, buffer.length);\r\n      module.cachedByValue = memory.allocate(3 * 8); // LLVM C-ABI, max used is 3 * usize\r\n      return module;\r\n    } finally {\r\n      memory.free(changetype<usize>(cArr));\r\n    }\r\n  }\r\n\r\n  private constructor() { }\r\n\r\n  // types\r\n\r\n  addFunctionType(\r\n    name: string,\r\n    result: NativeType,\r\n    paramTypes: NativeType[] | null\r\n  ): FunctionRef {\r\n    var cStr = allocString(name);\r\n    var cArr = allocI32Array(paramTypes);\r\n    try {\r\n      return _BinaryenAddFunctionType(this.ref, cStr, result, cArr, paramTypes ? paramTypes.length : 0);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  getFunctionTypeBySignature(\r\n    result: NativeType,\r\n    paramTypes: NativeType[] | null\r\n  ): FunctionTypeRef {\r\n    var cArr = allocI32Array(paramTypes);\r\n    try {\r\n      return _BinaryenGetFunctionTypeBySignature(this.ref, result, cArr, paramTypes ? paramTypes.length : 0);\r\n    } finally {\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  removeFunctionType(name: string): void {\r\n    var cStr = allocString(name);\r\n    try {\r\n      _BinaryenRemoveFunctionType(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  // constants\r\n\r\n  createI32(value: i32): ExpressionRef {\r\n    var out = this.cachedByValue;\r\n    _BinaryenLiteralInt32(out, value);\r\n    return _BinaryenConst(this.ref, out);\r\n  }\r\n\r\n  createI64(valueLow: i32, valueHigh: i32 = 0): ExpressionRef {\r\n    var out = this.cachedByValue;\r\n    _BinaryenLiteralInt64(out, valueLow, valueHigh);\r\n    return _BinaryenConst(this.ref, out);\r\n  }\r\n\r\n  createF32(value: f32): ExpressionRef {\r\n    var out = this.cachedByValue;\r\n    _BinaryenLiteralFloat32(out, value);\r\n    return _BinaryenConst(this.ref, out);\r\n  }\r\n\r\n  createF64(value: f64): ExpressionRef {\r\n    var out = this.cachedByValue;\r\n    _BinaryenLiteralFloat64(out, value);\r\n    return _BinaryenConst(this.ref, out);\r\n  }\r\n\r\n  // expressions\r\n\r\n  createUnary(\r\n    op: UnaryOp,\r\n    expr: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenUnary(this.ref, op, expr);\r\n  }\r\n\r\n  createBinary(\r\n    op: BinaryOp,\r\n    left: ExpressionRef,\r\n    right: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenBinary(this.ref, op, left, right);\r\n  }\r\n\r\n  createHost(\r\n    op: HostOp,\r\n    name: string | null = null,\r\n    operands: ExpressionRef[] | null = null\r\n  ): ExpressionRef {\r\n    var cStr = allocString(name);\r\n    var cArr = allocPtrArray(operands);\r\n    try {\r\n      return _BinaryenHost(this.ref, op, cStr, cArr, operands ? (<ExpressionRef[]>operands).length : 0);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createGetLocal(\r\n    index: i32,\r\n    type: NativeType\r\n  ): ExpressionRef {\r\n    return _BinaryenGetLocal(this.ref, index, type);\r\n  }\r\n\r\n  createTeeLocal(\r\n    index: i32,\r\n    value: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenTeeLocal(this.ref, index, value);\r\n  }\r\n\r\n  createGetGlobal(\r\n    name: string,\r\n    type: NativeType\r\n  ): ExpressionRef {\r\n    var cStr = allocString(name);\r\n    try {\r\n      return _BinaryenGetGlobal(this.ref, cStr, type);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createLoad(\r\n    bytes: Index,\r\n    signed: bool,\r\n    ptr: ExpressionRef,\r\n    type: NativeType,\r\n    offset: Index = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenLoad(this.ref, bytes, signed ? 1 : 0, offset, /* always aligned */ bytes, type, ptr);\r\n  }\r\n\r\n  createStore(\r\n    bytes: Index,\r\n    ptr: ExpressionRef,\r\n    value: ExpressionRef,\r\n    type: NativeType,\r\n    offset: Index = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenStore(this.ref, bytes, offset, /* always aligned */ bytes, ptr, value, type);\r\n  }\r\n\r\n  createAtomicLoad(\r\n    bytes: Index,\r\n    ptr: ExpressionRef,\r\n    type: NativeType,\r\n    offset: Index = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicLoad(this.ref, bytes, offset, type, ptr);\r\n  }\r\n\r\n  createAtomicStore(\r\n    bytes: Index,\r\n    ptr: ExpressionRef,\r\n    value: ExpressionRef,\r\n    type: NativeType,\r\n    offset: Index = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicStore(this.ref, bytes, offset, ptr, value, type);\r\n  }\r\n\r\n  createAtomicRMW(\r\n    op: AtomicRMWOp,\r\n    bytes: Index,\r\n    offset: Index,\r\n    ptr: ExpressionRef,\r\n    value: ExpressionRef,\r\n    type: NativeType\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicRMW(this.ref, op, bytes, offset, ptr, value, type);\r\n  }\r\n\r\n  createAtomicCmpxchg(\r\n    bytes: Index,\r\n    offset: Index,\r\n    ptr: ExpressionRef,\r\n    expected: ExpressionRef,\r\n    replacement: ExpressionRef,\r\n    type: NativeType\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicCmpxchg(this.ref, bytes, offset, ptr, expected, replacement, type);\r\n  }\r\n\r\n  createAtomicWait(\r\n    ptr: ExpressionRef,\r\n    expected: ExpressionRef,\r\n    timeout: ExpressionRef,\r\n    expectedType: NativeType\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicWait(this.ref, ptr, expected, timeout, expectedType);\r\n  }\r\n\r\n  createAtomicWake(\r\n    ptr: ExpressionRef,\r\n    wakeCount: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenAtomicWake(this.ref, ptr, wakeCount);\r\n  }\r\n\r\n  // statements\r\n\r\n  createSetLocal(\r\n    index: Index,\r\n    value: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenSetLocal(this.ref, index, value);\r\n  }\r\n\r\n  createSetGlobal(\r\n    name: string,\r\n    value: ExpressionRef\r\n  ): ExpressionRef {\r\n    var cStr = allocString(name);\r\n    try {\r\n      return _BinaryenSetGlobal(this.ref, cStr, value);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createBlock(\r\n    label: string | null,\r\n    children: ExpressionRef[],\r\n    type: NativeType = NativeType.None\r\n  ): ExpressionRef {\r\n    var cStr = allocString(label);\r\n    var cArr = allocPtrArray(children);\r\n    try {\r\n      return _BinaryenBlock(this.ref, cStr, cArr, children.length, type);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createBreak(\r\n    label: string | null,\r\n    condition: ExpressionRef = 0,\r\n    value: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    var cStr = allocString(label);\r\n    try {\r\n      return _BinaryenBreak(this.ref, cStr, condition, value);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createDrop(\r\n    expression: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenDrop(this.ref, expression);\r\n  }\r\n\r\n  createLoop(\r\n    label: string | null,\r\n    body: ExpressionRef\r\n  ): ExpressionRef {\r\n    var cStr = allocString(label);\r\n    try {\r\n      return _BinaryenLoop(this.ref, cStr, body);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createIf(\r\n    condition: ExpressionRef,\r\n    ifTrue: ExpressionRef,\r\n    ifFalse: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenIf(this.ref, condition, ifTrue, ifFalse);\r\n  }\r\n\r\n  createNop(): ExpressionRef {\r\n    return _BinaryenNop(this.ref);\r\n  }\r\n\r\n  createReturn(\r\n    expression: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    return _BinaryenReturn(this.ref, expression);\r\n  }\r\n\r\n  createSelect(\r\n    ifTrue: ExpressionRef,\r\n    ifFalse: ExpressionRef,\r\n    condition: ExpressionRef\r\n  ): ExpressionRef {\r\n    return _BinaryenSelect(this.ref, condition, ifTrue, ifFalse);\r\n  }\r\n\r\n  createSwitch(\r\n    names: string[],\r\n    defaultName: string | null,\r\n    condition: ExpressionRef,\r\n    value: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    var numNames = names.length;\r\n    var strs = new Array<usize>(numNames);\r\n    for (let i = 0; i < numNames; ++i) {\r\n      strs[i] = allocString(names[i]);\r\n    }\r\n    var cArr = allocI32Array(strs);\r\n    var cStr = allocString(defaultName);\r\n    try {\r\n      return _BinaryenSwitch(this.ref, cArr, numNames, cStr, condition, value);\r\n    } finally {\r\n      memory.free(cStr);\r\n      memory.free(cArr);\r\n      for (let i = numNames - 1; i >= 0; --i) memory.free(strs[i]);\r\n    }\r\n  }\r\n\r\n  createCall(\r\n    target: string,\r\n    operands: ExpressionRef[] | null,\r\n    returnType: NativeType\r\n  ): ExpressionRef {\r\n    var cStr = allocString(target);\r\n    var cArr = allocPtrArray(operands);\r\n    try {\r\n      return _BinaryenCall(this.ref, cStr, cArr, operands && operands.length || 0, returnType);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createCallImport(\r\n    target: string,\r\n    operands: ExpressionRef[] | null,\r\n    returnType: NativeType\r\n  ): ExpressionRef {\r\n    var cStr = allocString(target);\r\n    var cArr = allocPtrArray(operands);\r\n    try {\r\n      return _BinaryenCallImport(this.ref, cStr, cArr, operands && operands.length || 0, returnType);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  createCallIndirect(\r\n    index: ExpressionRef,\r\n    operands: ExpressionRef[] | null,\r\n    typeName: string\r\n  ): ExpressionRef {\r\n    var cArr = allocPtrArray(operands);\r\n    var cStr = allocString(typeName);\r\n    try {\r\n      return _BinaryenCallIndirect(this.ref, index, cArr, operands && operands.length || 0, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  createUnreachable(): ExpressionRef {\r\n    return _BinaryenUnreachable(this.ref);\r\n  }\r\n\r\n  // meta\r\n\r\n  addGlobal(\r\n    name: string,\r\n    type: NativeType,\r\n    mutable: bool,\r\n    initializer: ExpressionRef\r\n  ): GlobalRef {\r\n    var cStr = allocString(name);\r\n    try {\r\n      return _BinaryenAddGlobal(this.ref, cStr, type, mutable ? 1 : 0, initializer);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  addFunction(\r\n    name: string,\r\n    type: FunctionTypeRef,\r\n    varTypes: NativeType[] | null,\r\n    body: ExpressionRef\r\n  ): FunctionRef {\r\n    var cStr = allocString(name);\r\n    var cArr = allocI32Array(varTypes);\r\n    try {\r\n      return _BinaryenAddFunction(this.ref, cStr, type, cArr, varTypes ? varTypes.length : 0, body);\r\n    } finally {\r\n      memory.free(cArr);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  removeFunction(name: string): void {\r\n    var cStr = allocString(name);\r\n    try {\r\n      _BinaryenRemoveFunction(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  private cachedTemporaryName: usize = 0;\r\n  private hasTemporaryFunction: bool = false;\r\n\r\n  addTemporaryFunction(result: NativeType, paramTypes: NativeType[] | null, body: ExpressionRef): FunctionRef {\r\n    this.hasTemporaryFunction = assert(!this.hasTemporaryFunction);\r\n    var tempName = this.cachedTemporaryName;\r\n    if (!tempName) this.cachedTemporaryName = tempName = allocString(\"\"); // works because strings are interned\r\n    var cArr = allocI32Array(paramTypes);\r\n    try {\r\n      let typeRef = _BinaryenAddFunctionType(this.ref, tempName, result, cArr, paramTypes ? paramTypes.length : 0);\r\n      return _BinaryenAddFunction(this.ref, tempName, typeRef, 0, 0, body);\r\n    } finally {\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  removeTemporaryFunction(): void {\r\n    this.hasTemporaryFunction = !assert(this.hasTemporaryFunction);\r\n    var tempName = assert(this.cachedTemporaryName);\r\n    _BinaryenRemoveFunction(this.ref, tempName);\r\n    _BinaryenRemoveFunctionType(this.ref, tempName);\r\n  }\r\n\r\n  addFunctionExport(\r\n    internalName: string,\r\n    externalName: string\r\n  ): ExportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalName);\r\n    try {\r\n      return _BinaryenAddFunctionExport(this.ref, cStr1, cStr2);\r\n    } finally {\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addTableExport(\r\n    internalName: string,\r\n    externalName: string\r\n  ): ExportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalName);\r\n    try {\r\n      return _BinaryenAddTableExport(this.ref, cStr1, cStr2);\r\n    } finally {\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addMemoryExport(\r\n    internalName: string,\r\n    externalName: string\r\n  ): ExportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalName);\r\n    try {\r\n      return _BinaryenAddMemoryExport(this.ref, cStr1, cStr2);\r\n    } finally {\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addGlobalExport(\r\n    internalName: string,\r\n    externalName: string\r\n  ): ExportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalName);\r\n    try {\r\n      return _BinaryenAddGlobalExport(this.ref, cStr1, cStr2);\r\n    } finally {\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  removeExport(externalName: string): void {\r\n    var cStr = allocString(externalName);\r\n    try {\r\n      _BinaryenRemoveExport(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  addFunctionImport(\r\n    internalName: string,\r\n    externalModuleName: string,\r\n    externalBaseName: string,\r\n    functionType: FunctionTypeRef\r\n  ): ImportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalModuleName);\r\n    var cStr3 = allocString(externalBaseName);\r\n    try {\r\n      return _BinaryenAddFunctionImport(this.ref, cStr1, cStr2, cStr3, functionType);\r\n    } finally {\r\n      memory.free(cStr3);\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addTableImport(\r\n    internalName: string,\r\n    externalModuleName: string,\r\n    externalBaseName: string\r\n  ): ImportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalModuleName);\r\n    var cStr3 = allocString(externalBaseName);\r\n    try {\r\n      return _BinaryenAddTableImport(this.ref, cStr1, cStr2, cStr3);\r\n    } finally {\r\n      memory.free(cStr3);\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addMemoryImport(\r\n    internalName: string,\r\n    externalModuleName: string,\r\n    externalBaseName: string\r\n  ): ImportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalModuleName);\r\n    var cStr3 = allocString(externalBaseName);\r\n    try {\r\n      return _BinaryenAddMemoryImport(this.ref, cStr1, cStr2, cStr3);\r\n    } finally {\r\n      memory.free(cStr3);\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  addGlobalImport(\r\n    internalName: string,\r\n    externalModuleName: string,\r\n    externalBaseName: string,\r\n    globalType: NativeType\r\n  ): ImportRef {\r\n    var cStr1 = allocString(internalName);\r\n    var cStr2 = allocString(externalModuleName);\r\n    var cStr3 = allocString(externalBaseName);\r\n    try {\r\n      return _BinaryenAddGlobalImport(this.ref, cStr1, cStr2, cStr3, globalType);\r\n    } finally {\r\n      memory.free(cStr3);\r\n      memory.free(cStr2);\r\n      memory.free(cStr1);\r\n    }\r\n  }\r\n\r\n  removeImport(internalName: string): void {\r\n    var cStr = allocString(internalName);\r\n    try {\r\n      _BinaryenRemoveImport(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  setMemory(\r\n    initial: Index,\r\n    maximum: Index,\r\n    segments: MemorySegment[],\r\n    target: Target,\r\n    exportName: string | null = null\r\n  ): void {\r\n    var cStr = allocString(exportName);\r\n    var k = segments.length;\r\n    var segs = new Array<usize>(k);\r\n    var offs = new Array<ExpressionRef>(k);\r\n    var sizs = new Array<Index>(k);\r\n    for (let i = 0; i < k; ++i) {\r\n      let buffer = segments[i].buffer;\r\n      let offset = segments[i].offset;\r\n      segs[i] = allocU8Array(buffer);\r\n      offs[i] = target == Target.WASM64\r\n        ? this.createI64(i64_low(offset), i64_high(offset))\r\n        : this.createI32(i64_low(offset));\r\n      sizs[i] = buffer.length;\r\n    }\r\n    var cArr1 = allocI32Array(segs);\r\n    var cArr2 = allocI32Array(offs);\r\n    var cArr3 = allocI32Array(sizs);\r\n    try {\r\n      _BinaryenSetMemory(this.ref, initial, maximum, cStr, cArr1, cArr2, cArr3, k);\r\n    } finally {\r\n      memory.free(cArr3);\r\n      memory.free(cArr2);\r\n      memory.free(cArr1);\r\n      for (let i = k - 1; i >= 0; --i) memory.free(segs[i]);\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  setFunctionTable(funcs: FunctionRef[]): void {\r\n    var cArr = allocPtrArray(funcs);\r\n    try {\r\n      _BinaryenSetFunctionTable(this.ref, cArr, funcs.length);\r\n    } finally {\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  setStart(func: FunctionRef): void {\r\n    _BinaryenSetStart(this.ref, func);\r\n  }\r\n\r\n  getOptimizeLevel(): i32 {\r\n    return _BinaryenGetOptimizeLevel();\r\n  }\r\n\r\n  setOptimizeLevel(level: i32 = 2): void {\r\n    _BinaryenSetOptimizeLevel(level);\r\n  }\r\n\r\n  getShrinkLevel(): i32 {\r\n    return _BinaryenGetShrinkLevel();\r\n  }\r\n\r\n  setShrinkLevel(level: i32 = 1): void {\r\n    _BinaryenSetShrinkLevel(level);\r\n  }\r\n\r\n  setDebugInfo(on: bool = false): void {\r\n    _BinaryenSetDebugInfo(on);\r\n  }\r\n\r\n  optimize(func: FunctionRef = 0): void {\r\n    if (func) {\r\n      _BinaryenFunctionOptimize(func, this.ref);\r\n    } else {\r\n      _BinaryenModuleOptimize(this.ref);\r\n    }\r\n  }\r\n\r\n  runPasses(passes: string[], func: FunctionRef = 0): void {\r\n    var numNames = passes.length;\r\n    var names = new Array<usize>(numNames);\r\n    for (let i = 0; i < numNames; ++i) {\r\n      names[i] = allocString(passes[i]);\r\n    }\r\n    var cArr = allocI32Array(names);\r\n    try {\r\n      if (func) {\r\n        _BinaryenFunctionRunPasses(func, this.ref, cArr, numNames);\r\n      } else {\r\n        _BinaryenModuleRunPasses(this.ref, cArr, numNames);\r\n      }\r\n    } finally {\r\n      memory.free(cArr);\r\n      for (let i = numNames; i >= 0; --i) memory.free(names[i]);\r\n    }\r\n  }\r\n\r\n  private cachedPrecomputeName: usize = 0; // for free'ing\r\n  private cachedPrecomputeNames: usize = 0;\r\n\r\n  precomputeExpression(expr: ExpressionRef): ExpressionRef {\r\n    // remember the previous optimize levels and set to max instead, to be sure\r\n    var previousOptimizeLevel = _BinaryenGetOptimizeLevel();\r\n    var previousShrinkLevel = _BinaryenGetShrinkLevel();\r\n    var previousDebugInfo = _BinaryenGetDebugInfo();\r\n    _BinaryenSetOptimizeLevel(4);\r\n    _BinaryenSetShrinkLevel(0);\r\n    _BinaryenSetDebugInfo(false);\r\n\r\n    // wrap the expression in a temp. function and run the precompute pass on it\r\n    var type = _BinaryenExpressionGetType(expr);\r\n    var func = this.addTemporaryFunction(type, null, expr);\r\n    var names = this.cachedPrecomputeNames;\r\n    if (!names) {\r\n      let name = allocString(\"precompute\");\r\n      this.cachedPrecomputeName = name;\r\n      this.cachedPrecomputeNames = names = allocI32Array([ name ]);\r\n    }\r\n    _BinaryenFunctionRunPasses(func, this.ref, names, 1);\r\n    expr = _BinaryenFunctionGetBody(func);\r\n    this.removeTemporaryFunction();\r\n\r\n    // reset optimize levels to previous\r\n    _BinaryenSetOptimizeLevel(previousOptimizeLevel);\r\n    _BinaryenSetShrinkLevel(previousShrinkLevel);\r\n    _BinaryenSetDebugInfo(previousDebugInfo);\r\n    return expr;\r\n  }\r\n\r\n  validate(): bool {\r\n    return _BinaryenModuleValidate(this.ref) == 1;\r\n  }\r\n\r\n  interpret(): void {\r\n    _BinaryenModuleInterpret(this.ref);\r\n  }\r\n\r\n  toBinary(sourceMapUrl: string | null): BinaryModule {\r\n    var out = this.cachedByValue;\r\n    var cStr = allocString(sourceMapUrl);\r\n    var binaryPtr: usize = 0;\r\n    var sourceMapPtr: usize = 0;\r\n    try {\r\n      _BinaryenModuleAllocateAndWrite(out, this.ref, cStr);\r\n      binaryPtr = readInt(out);\r\n      let binaryBytes = readInt(out + 4);\r\n      sourceMapPtr = readInt(out + 4 * 2);\r\n      let ret = new BinaryModule();\r\n      ret.output = readBuffer(binaryPtr, binaryBytes);\r\n      ret.sourceMap = readString(sourceMapPtr);\r\n      return ret;\r\n    } finally {\r\n      if (cStr) memory.free(cStr);\r\n      if (binaryPtr) memory.free(binaryPtr);\r\n      if (sourceMapPtr) memory.free(sourceMapPtr);\r\n    }\r\n  }\r\n\r\n  toText(): string {\r\n    throw new Error(\"not implemented\"); // JS glue overrides this\r\n  }\r\n\r\n  toAsmjs(): string {\r\n    throw new Error(\"not implemented\"); // JS glue overrides this\r\n  }\r\n\r\n  dispose(): void {\r\n    assert(this.ref);\r\n    memory.free(this.cachedByValue);\r\n    memory.free(this.cachedTemporaryName);\r\n    memory.free(this.cachedPrecomputeName);\r\n    memory.free(this.cachedPrecomputeNames);\r\n    _BinaryenModuleDispose(this.ref);\r\n    this.ref = 0;\r\n  }\r\n\r\n  createRelooper(): Relooper {\r\n    return Relooper.create(this);\r\n  }\r\n\r\n  cloneExpression(\r\n    expr: ExpressionRef,\r\n    noSideEffects: bool = false,\r\n    maxDepth: i32 = i32.MAX_VALUE\r\n  ): ExpressionRef { // currently supports side effect free expressions only\r\n    if (maxDepth < 0) return 0;\r\n    maxDepth -= 1;\r\n\r\n    var nested1: ExpressionRef,\r\n        nested2: ExpressionRef;\r\n\r\n        switch (_BinaryenExpressionGetId(expr)) {\r\n      case ExpressionId.Const: {\r\n        switch (_BinaryenExpressionGetType(expr)) {\r\n          case NativeType.I32: {\r\n            return this.createI32(_BinaryenConstGetValueI32(expr));\r\n          }\r\n          case NativeType.I64: {\r\n            return this.createI64(\r\n              _BinaryenConstGetValueI64Low(expr),\r\n              _BinaryenConstGetValueI64High(expr)\r\n            );\r\n          }\r\n          case NativeType.F32: {\r\n            return this.createF32(_BinaryenConstGetValueF32(expr));\r\n          }\r\n          case NativeType.F64: {\r\n            return this.createF64(_BinaryenConstGetValueF64(expr));\r\n          }\r\n          default: {\r\n            throw new Error(\"concrete type expected\");\r\n          }\r\n        }\r\n      }\r\n      case ExpressionId.GetLocal: {\r\n        return _BinaryenGetLocal(this.ref,\r\n          _BinaryenGetLocalGetIndex(expr),\r\n          _BinaryenExpressionGetType(expr)\r\n        );\r\n      }\r\n      case ExpressionId.GetGlobal: {\r\n        let globalName = _BinaryenGetGlobalGetName(expr);\r\n        if (!globalName) break;\r\n        return _BinaryenGetGlobal(this.ref, globalName, _BinaryenExpressionGetType(expr));\r\n      }\r\n      case ExpressionId.Load: {\r\n        if (!(nested1 = this.cloneExpression(_BinaryenLoadGetPtr(expr), noSideEffects, maxDepth))) {\r\n          break;\r\n        }\r\n        return (\r\n          _BinaryenLoadIsAtomic(expr)\r\n            ? _BinaryenAtomicLoad(this.ref,\r\n                _BinaryenLoadGetBytes(expr),\r\n                _BinaryenLoadGetOffset(expr),\r\n                _BinaryenExpressionGetType(expr),\r\n                nested1\r\n              )\r\n            : _BinaryenLoad(this.ref,\r\n                _BinaryenLoadGetBytes(expr),\r\n                _BinaryenLoadIsSigned(expr) ? 1 : 0,\r\n                _BinaryenLoadGetOffset(expr),\r\n                _BinaryenLoadGetAlign(expr),\r\n                _BinaryenExpressionGetType(expr),\r\n                nested1\r\n              )\r\n        );\r\n      }\r\n      case ExpressionId.Unary: {\r\n        if (!(nested1 = this.cloneExpression(_BinaryenUnaryGetValue(expr), noSideEffects, maxDepth))) {\r\n          break;\r\n        }\r\n        return _BinaryenUnary(this.ref, _BinaryenUnaryGetOp(expr), nested1);\r\n      }\r\n      case ExpressionId.Binary: {\r\n        if (!(nested1 = this.cloneExpression(_BinaryenBinaryGetLeft(expr), noSideEffects, maxDepth))) {\r\n          break;\r\n        }\r\n        if (!(nested2 = this.cloneExpression(_BinaryenBinaryGetRight(expr), noSideEffects, maxDepth))) {\r\n          break;\r\n        }\r\n        return _BinaryenBinary(this.ref, _BinaryenBinaryGetOp(expr), nested1, nested2);\r\n      }\r\n    }\r\n    return 0;\r\n  }\r\n\r\n  // source map generation\r\n\r\n  addDebugInfoFile(name: string): Index {\r\n    var cStr = allocString(name);\r\n    try {\r\n      return _BinaryenModuleAddDebugInfoFileName(this.ref, cStr);\r\n    } finally {\r\n      memory.free(cStr);\r\n    }\r\n  }\r\n\r\n  getDebugInfoFile(index: Index): string | null {\r\n    return readString(_BinaryenModuleGetDebugInfoFileName(this.ref, index));\r\n  }\r\n\r\n  setDebugLocation(\r\n    func: FunctionRef,\r\n    expr: ExpressionRef,\r\n    fileIndex: Index,\r\n    lineNumber: Index,\r\n    columnNumber: Index\r\n  ): void {\r\n    _BinaryenFunctionSetDebugLocation(func, expr, fileIndex, lineNumber, columnNumber);\r\n  }\r\n}\r\n\r\n// expressions\r\n\r\nexport function getExpressionId(expr: ExpressionRef): ExpressionId {\r\n  return _BinaryenExpressionGetId(expr);\r\n}\r\n\r\nexport function getExpressionType(expr: ExpressionRef): NativeType {\r\n  return _BinaryenExpressionGetType(expr);\r\n}\r\n\r\nexport function getConstValueI32(expr: ExpressionRef): i32 {\r\n  return _BinaryenConstGetValueI32(expr);\r\n}\r\n\r\nexport function getConstValueI64Low(expr: ExpressionRef): i32 {\r\n  return _BinaryenConstGetValueI64Low(expr);\r\n}\r\n\r\nexport function getConstValueI64High(expr: ExpressionRef): i32 {\r\n  return _BinaryenConstGetValueI64High(expr);\r\n}\r\n\r\nexport function getConstValueF32(expr: ExpressionRef): f32 {\r\n  return _BinaryenConstGetValueF32(expr);\r\n}\r\n\r\nexport function getConstValueF64(expr: ExpressionRef): f32 {\r\n  return _BinaryenConstGetValueF64(expr);\r\n}\r\n\r\nexport function getGetLocalIndex(expr: ExpressionRef): Index {\r\n  return _BinaryenGetLocalGetIndex(expr);\r\n}\r\n\r\nexport function getSetLocalIndex(expr: ExpressionRef): Index {\r\n  return _BinaryenSetLocalGetIndex(expr);\r\n}\r\n\r\nexport function getSetLocalValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenSetLocalGetValue(expr);\r\n}\r\n\r\nexport function isTeeLocal(expr: ExpressionRef): bool {\r\n  return _BinaryenSetLocalIsTee(expr);\r\n}\r\n\r\nexport function getBinaryOp(expr: ExpressionRef): BinaryOp {\r\n  return _BinaryenBinaryGetOp(expr);\r\n}\r\n\r\nexport function getBinaryLeft(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenBinaryGetLeft(expr);\r\n}\r\n\r\nexport function getBinaryRight(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenBinaryGetRight(expr);\r\n}\r\n\r\nexport function getUnaryOp(expr: ExpressionRef): UnaryOp {\r\n  return _BinaryenUnaryGetOp(expr);\r\n}\r\n\r\nexport function getUnaryValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenUnaryGetValue(expr);\r\n}\r\n\r\nexport function getLoadBytes(expr: ExpressionRef): u32 {\r\n  return _BinaryenLoadGetBytes(expr);\r\n}\r\n\r\nexport function getLoadOffset(expr: ExpressionRef): u32 {\r\n  return _BinaryenLoadGetOffset(expr);\r\n}\r\n\r\nexport function getLoadPtr(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenLoadGetPtr(expr);\r\n}\r\n\r\nexport function isLoadSigned(expr: ExpressionRef): bool {\r\n  return _BinaryenLoadIsSigned(expr);\r\n}\r\n\r\nexport function getStoreBytes(expr: ExpressionRef): u32 {\r\n  return _BinaryenStoreGetBytes(expr);\r\n}\r\n\r\nexport function getStoreOffset(expr: ExpressionRef): u32 {\r\n  return _BinaryenStoreGetOffset(expr);\r\n}\r\n\r\nexport function getStorePtr(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenStoreGetPtr(expr);\r\n}\r\n\r\nexport function getStoreValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenStoreGetValue(expr);\r\n}\r\n\r\nexport function getBlockName(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenBlockGetName(expr));\r\n}\r\n\r\nexport function getBlockChildCount(expr: ExpressionRef): Index {\r\n  return _BinaryenBlockGetNumChildren(expr);\r\n}\r\n\r\nexport function getBlockChild(expr: ExpressionRef, index: Index): ExpressionRef {\r\n  return _BinaryenBlockGetChild(expr, index);\r\n}\r\n\r\nexport function getIfCondition(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenIfGetCondition(expr);\r\n}\r\n\r\nexport function getIfTrue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenIfGetIfTrue(expr);\r\n}\r\n\r\nexport function getIfFalse(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenIfGetIfFalse(expr);\r\n}\r\n\r\nexport function getLoopName(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenLoopGetName(expr));\r\n}\r\n\r\nexport function getLoopBody(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenLoopGetBody(expr);\r\n}\r\n\r\nexport function getBreakName(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenBreakGetName(expr));\r\n}\r\n\r\nexport function getBreakCondition(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenBreakGetCondition(expr);\r\n}\r\n\r\nexport function getSelectThen(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenSelectGetIfTrue(expr);\r\n}\r\n\r\nexport function getSelectElse(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenSelectGetIfFalse(expr);\r\n}\r\n\r\nexport function getSelectCondition(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenSelectGetCondition(expr);\r\n}\r\n\r\nexport function getDropValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenDropGetValue(expr);\r\n}\r\n\r\nexport function getReturnValue(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenReturnGetValue(expr);\r\n}\r\n\r\nexport function getCallTarget(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenCallGetTarget(expr));\r\n}\r\n\r\nexport function getHostOp(expr: ExpressionRef): ExpressionRef {\r\n  return _BinaryenHostGetOp(expr);\r\n}\r\n\r\nexport function getHostOperandCount(expr: ExpressionRef): Index {\r\n  return _BinaryenHostGetNumOperands(expr);\r\n}\r\n\r\nexport function getHostOperand(expr: ExpressionRef, index: Index): ExpressionRef {\r\n  return _BinaryenHostGetOperand(expr, index);\r\n}\r\n\r\nexport function getHostName(expr: ExpressionRef): string | null {\r\n  return readString(_BinaryenHostGetNameOperand(expr));\r\n}\r\n\r\n// functions\r\n\r\nexport function getFunctionBody(func: FunctionRef): ExpressionRef {\r\n  return _BinaryenFunctionGetBody(func);\r\n}\r\n\r\nexport function getFunctionName(func: FunctionRef): string | null {\r\n  return readString(_BinaryenFunctionGetName(func));\r\n}\r\n\r\nexport function getFunctionParamCount(func: FunctionRef): Index {\r\n  return _BinaryenFunctionGetNumParams(func);\r\n}\r\n\r\nexport function getFunctionParamType(func: FunctionRef, index: Index): NativeType {\r\n  return _BinaryenFunctionGetParam(func, index);\r\n}\r\n\r\nexport function getFunctionResultType(func: FunctionRef): NativeType {\r\n  return _BinaryenFunctionGetResult(func);\r\n}\r\n\r\nexport class Relooper {\r\n\r\n  module: Module;\r\n  ref: RelooperRef;\r\n\r\n  static create(module: Module): Relooper {\r\n    var relooper = new Relooper();\r\n    relooper.module = module;\r\n    relooper.ref = _RelooperCreate();\r\n    return relooper;\r\n  }\r\n\r\n  private constructor() {}\r\n\r\n  addBlock(code: ExpressionRef): RelooperBlockRef {\r\n    return _RelooperAddBlock(this.ref, code);\r\n  }\r\n\r\n  addBranch(from: RelooperBlockRef, to: RelooperBlockRef, condition: ExpressionRef = 0, code: ExpressionRef = 0): void {\r\n    _RelooperAddBranch(from, to, condition, code);\r\n  }\r\n\r\n  addBlockWithSwitch(code: ExpressionRef, condition: ExpressionRef): RelooperBlockRef {\r\n    return _RelooperAddBlockWithSwitch(this.ref, code, condition);\r\n  }\r\n\r\n  addBranchForSwitch(from: RelooperBlockRef, to: RelooperBlockRef, indexes: i32[], code: ExpressionRef = 0): void {\r\n    var cArr = allocI32Array(indexes);\r\n    try {\r\n      _RelooperAddBranchForSwitch(from, to, cArr, indexes.length, code);\r\n    } finally {\r\n      memory.free(cArr);\r\n    }\r\n  }\r\n\r\n  renderAndDispose(entry: RelooperBlockRef, labelHelper: Index): ExpressionRef {\r\n    return _RelooperRenderAndDispose(this.ref, entry, labelHelper, this.module.ref);\r\n  }\r\n}\r\n\r\n// export function hasSideEffects(expr: ExpressionRef): bool {\r\n//   switch (_BinaryenExpressionGetId(expr = getPtr(expr))) {\r\n//     case ExpressionId.GetLocal:\r\n//     case ExpressionId.GetGlobal:\r\n//     case ExpressionId.Const:\r\n//     case ExpressionId.Nop:\r\n//     case ExpressionId.Unreachable: {\r\n//       return false;\r\n//     }\r\n//     case ExpressionId.Block: {\r\n//       for (let i = 0, k = _BinaryenBlockGetNumChildren(expr); i < k; ++i) {\r\n//         if (hasSideEffects(_BinaryenBlockGetChild(expr, i))) return true;\r\n//       }\r\n//       return false;\r\n//     }\r\n//     case ExpressionId.If: {\r\n//       return hasSideEffects(_BinaryenIfGetCondition(expr))\r\n//           || hasSideEffects(_BinaryenIfGetIfTrue(expr))\r\n//           || hasSideEffects(_BinaryenIfGetIfFalse(expr));\r\n//     }\r\n//     case ExpressionId.Unary: {\r\n//       return hasSideEffects(_BinaryenUnaryGetValue(expr));\r\n//     }\r\n//     case ExpressionId.Binary: {\r\n//       return hasSideEffects(_BinaryenBinaryGetLeft(expr))\r\n//           || hasSideEffects(_BinaryenBinaryGetRight(expr));\r\n//     }\r\n//     case ExpressionId.Drop: {\r\n//       return hasSideEffects(_BinaryenDropGetValue(expr));\r\n//     }\r\n//     case ExpressionId.Select: {\r\n//       return hasSideEffects(_BinaryenSelectGetIfTrue(expr))\r\n//           || hasSideEffects(_BinaryenSelectGetIfFalse(expr))\r\n//           || hasSideEffects(_BinaryenSelectGetCondition(expr));\r\n//     }\r\n//   }\r\n//   return true;\r\n// }\r\n\r\n// helpers\r\n// can't do stack allocation here: STACKTOP is a global in WASM but a hidden variable in asm.js\r\n\r\nfunction allocU8Array(u8s: Uint8Array | null): usize {\r\n  if (!u8s) return 0;\r\n  var numValues = u8s.length;\r\n  var ptr = memory.allocate(numValues);\r\n  var idx = ptr;\r\n  for (let i = 0; i < numValues; ++i) {\r\n    store<u8>(idx++, u8s[i]);\r\n  }\r\n  return ptr;\r\n}\r\n\r\nfunction allocI32Array(i32s: i32[] | null): usize {\r\n  if (!i32s) return 0;\r\n  var ptr = memory.allocate(i32s.length << 2);\r\n  var idx = ptr;\r\n  for (let i = 0, k = i32s.length; i < k; ++i) {\r\n    let val = i32s[i];\r\n    // store<i32>(idx, val) is not portable\r\n    store<u8>(idx    , ( val         & 0xff) as u8);\r\n    store<u8>(idx + 1, ((val >>   8) & 0xff) as u8);\r\n    store<u8>(idx + 2, ((val >>  16) & 0xff) as u8);\r\n    store<u8>(idx + 3, ( val >>> 24        ) as u8);\r\n    idx += 4;\r\n  }\r\n  return ptr;\r\n}\r\n\r\nfunction allocPtrArray(ptrs: usize[] | null): usize {\r\n  return allocI32Array(ptrs); // TODO: WASM64 one day\r\n}\r\n\r\nfunction stringLengthUTF8(str: string): usize {\r\n  var len = 0;\r\n  for (let i = 0, k = str.length; i < k; ++i) {\r\n    let u = str.charCodeAt(i);\r\n    if (u >= 0xD800 && u <= 0xDFFF && i + 1 < k) {\r\n      u = 0x10000 + ((u & 0x3FF) << 10) | (str.charCodeAt(++i) & 0x3FF);\r\n    }\r\n    if (u <= 0x7F) {\r\n      ++len;\r\n    } else if (u <= 0x7FF) {\r\n      len += 2;\r\n    } else if (u <= 0xFFFF) {\r\n      len += 3;\r\n    } else if (u <= 0x1FFFFF) {\r\n      len += 4;\r\n    } else if (u <= 0x3FFFFFF) {\r\n      len += 5;\r\n    } else {\r\n      len += 6;\r\n    }\r\n  }\r\n  return len;\r\n}\r\n\r\nfunction allocString(str: string | null): usize {\r\n  if (str == null) return 0;\r\n  var ptr = memory.allocate(stringLengthUTF8(str) + 1);\r\n  // the following is based on Emscripten's stringToUTF8Array\r\n  var idx = ptr;\r\n  for (let i = 0, k = str.length; i < k; ++i) {\r\n    let u = str.charCodeAt(i);\r\n    if (u >= 0xD800 && u <= 0xDFFF && i + 1 < k) {\r\n      u = 0x10000 + ((u & 0x3FF) << 10) | (str.charCodeAt(++i) & 0x3FF);\r\n    }\r\n    if (u <= 0x7F) {\r\n      store<u8>(idx++, u as u8);\r\n    } else if (u <= 0x7FF) {\r\n      store<u8>(idx++, (0xC0 |  (u >>> 6)       ) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    } else if (u <= 0xFFFF) {\r\n      store<u8>(idx++, (0xE0 |  (u >>> 12)      ) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>>  6) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    } else if (u <= 0x1FFFFF) {\r\n      store<u8>(idx++, (0xF0 |  (u >>> 18)      ) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 12) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>>  6) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    } else if (u <= 0x3FFFFFF) {\r\n      store<u8>(idx++, (0xF8 |  (u >>> 24)      ) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 18) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 12) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>>  6) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    } else {\r\n      store<u8>(idx++, (0xFC |  (u >>> 30)      ) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 24) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 18) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>> 12) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ((u >>>  6) & 63)) as u8);\r\n      store<u8>(idx++, (0x80 | ( u         & 63)) as u8);\r\n    }\r\n  }\r\n  store<u8>(idx, 0);\r\n  return ptr;\r\n}\r\n\r\nfunction readInt(ptr: usize): i32 {\r\n  return (\r\n     load<u8>(ptr    )        |\r\n    (load<u8>(ptr + 1) <<  8) |\r\n    (load<u8>(ptr + 2) << 16) |\r\n    (load<u8>(ptr + 3) << 24)\r\n  );\r\n}\r\n\r\nfunction readBuffer(ptr: usize, length: usize): Uint8Array {\r\n  var ret = new Uint8Array(length);\r\n  for (let i: usize = 0; i < length; ++i) {\r\n    ret[i] = load<u8>(ptr + i);\r\n  }\r\n  return ret;\r\n}\r\n\r\nexport function readString(ptr: usize): string | null {\r\n  if (!ptr) return null;\r\n  var arr = new Array<i32>();\r\n  // the following is based on Emscripten's UTF8ArrayToString\r\n  var cp: u32;\r\n  var u1: u32, u2: u32, u3: u32, u4: u32, u5: u32;\r\n  while (cp = load<u8>(ptr++)) {\r\n    if (!(cp & 0x80)) {\r\n      arr.push(cp);\r\n      continue;\r\n    }\r\n    u1 = load<u8>(ptr++) & 63;\r\n    if ((cp & 0xE0) == 0xC0) {\r\n      arr.push(((cp & 31) << 6) | u1);\r\n      continue;\r\n    }\r\n    u2 = load<u8>(ptr++) & 63;\r\n    if ((cp & 0xF0) == 0xE0) {\r\n      cp = ((cp & 15) << 12) | (u1 << 6) | u2;\r\n    } else {\r\n      u3 = load<u8>(ptr++) & 63;\r\n      if ((cp & 0xF8) == 0xF0) {\r\n        cp = ((cp & 7) << 18) | (u1 << 12) | (u2 << 6) | u3;\r\n      } else {\r\n        u4 = load<u8>(ptr++) & 63;\r\n        if ((cp & 0xFC) == 0xF8) {\r\n          cp = ((cp & 3) << 24) | (u1 << 18) | (u2 << 12) | (u3 << 6) | u4;\r\n        } else {\r\n          u5 = load<u8>(ptr++) & 63;\r\n          cp = ((cp & 1) << 30) | (u1 << 24) | (u2 << 18) | (u3 << 12) | (u4 << 6) | u5;\r\n        }\r\n      }\r\n    }\r\n    arr.push(cp);\r\n    // if (cp < 0x10000) {\r\n    //   arr.push(cp);\r\n    // } else {\r\n    //   var ch = cp - 0x10000;\r\n    //   arr.push(0xD800 | (ch >> 10));\r\n    //   arr.push(0xDC00 | (ch & 0x3FF));\r\n    // }\r\n  }\r\n  // return String.fromCharCodes(arr);\r\n  return String.fromCodePoints(arr);\r\n}\r\n\r\n/** Result structure of {@link Module#toBinary}. */\r\nexport class BinaryModule {\r\n  /** WebAssembly binary. */\r\n  output: Uint8Array;\r\n  /** Source map, if generated. */\r\n  sourceMap: string | null;\r\n}\r\n\r\n/** Tests if an expression needs an explicit 'unreachable' when it is the terminating statement. */\r\nexport function needsExplicitUnreachable(expr: ExpressionRef): bool {\r\n  // not applicable if pushing a value to the stack\r\n  switch (_BinaryenExpressionGetType(expr)) {\r\n    case NativeType.I32:\r\n    case NativeType.I64:\r\n    case NativeType.F32:\r\n    case NativeType.F64: return false;\r\n  }\r\n  switch (_BinaryenExpressionGetId(expr)) {\r\n    case ExpressionId.Unreachable:\r\n    case ExpressionId.Return: return false;\r\n    case ExpressionId.Break: return _BinaryenBreakGetCondition(expr) != 0;\r\n    case ExpressionId.Block: {\r\n      if (!_BinaryenBlockGetName(expr)) { // can't break out of it\r\n        let numChildren = _BinaryenBlockGetNumChildren(expr); // last child needs unreachable\r\n        return numChildren > 0 && needsExplicitUnreachable(_BinaryenBlockGetChild(expr, numChildren - 1));\r\n      }\r\n    }\r\n  }\r\n  return true;\r\n}\r\n","var g;\r\n\r\n// This works in non-strict mode\r\ng = (function() {\r\n\treturn this;\r\n})();\r\n\r\ntry {\r\n\t// This works if eval is allowed (see CSP)\r\n\tg = g || Function(\"return this\")() || (1, eval)(\"this\");\r\n} catch (e) {\r\n\t// This works if the window reference is available\r\n\tif (typeof window === \"object\") g = window;\r\n}\r\n\r\n// g can still be undefined, but nothing to do about it...\r\n// We return undefined, instead of nothing here, so it's\r\n// easier to handle this case. if(!global) { ...}\r\n\r\nmodule.exports = g;\r\n","/**\r\n * Mappings from AssemblyScript types to WebAssembly types.\r\n * @module types\r\n *//***/\r\n\r\nimport {\r\n  Class,\r\n  FunctionTarget,\r\n  Program,\r\n  DecoratorFlags\r\n} from \"./program\";\r\n\r\nimport {\r\n  NativeType,\r\n  ExpressionRef,\r\n  Module\r\n} from \"./module\";\r\n\r\n/** Indicates the kind of a type. */\r\nexport const enum TypeKind {\r\n\r\n  // signed integers\r\n\r\n  /** An 8-bit signed integer. */\r\n  I8,\r\n  /** A 16-bit signed integer. */\r\n  I16,\r\n  /** A 32-bit signed integer. */\r\n  I32,\r\n  /** A 64-bit signed integer. */\r\n  I64,\r\n  /** A 32-bit/64-bit signed integer, depending on the target. */\r\n  ISIZE,\r\n\r\n  // unsigned integers\r\n\r\n  /** An 8-bit unsigned integer. */\r\n  U8,\r\n  /** A 16-bit unsigned integer. */\r\n  U16,\r\n  /** A 32-bit unsigned integer. Also the base of function types. */\r\n  U32,\r\n  /** A 64-bit unsigned integer. */\r\n  U64,\r\n  /** A 32-bit/64-bit unsigned integer, depending on the target. Also the base of class types. */\r\n  USIZE,\r\n  /** A 1-bit unsigned integer. */\r\n  BOOL, // sic\r\n\r\n  // floats\r\n\r\n  /** A 32-bit float. */\r\n  F32,\r\n  /** A 64-bit double. */\r\n  F64,\r\n\r\n  // other\r\n\r\n  /** No return type. */\r\n  VOID\r\n}\r\n\r\n/** Indicates capabilities of a type. */\r\nexport const enum TypeFlags {\r\n  NONE = 0,\r\n  /** Is a signed type that can represent negative values. */\r\n  SIGNED = 1 << 0,\r\n  /** Is an unsigned type that cannot represent negative values. */\r\n  UNSIGNED = 1 << 1,\r\n  /** Is an integer type. */\r\n  INTEGER = 1 << 2,\r\n  /** Is a floating point type. */\r\n  FLOAT = 1 << 3,\r\n  /** Is a pointer type. */\r\n  POINTER = 1 << 4,\r\n  /** Is smaller than 32-bits. */\r\n  SHORT = 1 << 5,\r\n  /** Is larger than 32-bits. */\r\n  LONG = 1 << 6,\r\n  /** Is a value type. */\r\n  VALUE = 1 << 7,\r\n  /** Is a reference type. */\r\n  REFERENCE = 1 << 8,\r\n  /** Is a nullable type. */\r\n  NULLABLE = 1 << 9\r\n}\r\n\r\n/** Represents a resolved type. */\r\nexport class Type {\r\n\r\n  /** Type kind. */\r\n  kind: TypeKind;\r\n  /** Type flags. */\r\n  flags: TypeFlags;\r\n  /** Size in bits. */\r\n  size: u32;\r\n  /** Size in bytes. */\r\n  byteSize: i32;\r\n  /** Underlying class reference, if a class type. */\r\n  classReference: Class | null;\r\n  /** Underlying signature reference, if a function type. */\r\n  signatureReference: Signature | null;\r\n  /** Respective non-nullable type, if nullable. */\r\n  nonNullableType: Type;\r\n  /** Cached nullable type, if non-nullable. */\r\n  private cachedNullableType: Type | null = null;\r\n\r\n  /** Constructs a new resolved type. */\r\n  constructor(kind: TypeKind, flags: TypeFlags, size: u32) {\r\n    this.kind = kind;\r\n    this.flags = flags;\r\n    this.size = size;\r\n    this.byteSize = <i32>ceil<f64>(<f64>size / 8);\r\n    this.classReference = null;\r\n    this.signatureReference = null;\r\n    this.nonNullableType = this;\r\n  }\r\n\r\n  /** Returns the closest int type representing this type. */\r\n  get intType(): Type {\r\n    switch (this.kind) {\r\n      case TypeKind.I8: return Type.i8;\r\n      case TypeKind.I16: return Type.i16;\r\n      case TypeKind.F32:\r\n      case TypeKind.I32: return Type.i32;\r\n      case TypeKind.F64:\r\n      case TypeKind.I64: return Type.i64;\r\n      case TypeKind.ISIZE: return this.size == 64 ? Type.isize64 : Type.isize32;\r\n      case TypeKind.U8: return Type.u8;\r\n      case TypeKind.U16: return Type.u16;\r\n      case TypeKind.U32: return Type.u32;\r\n      case TypeKind.U64: return Type.u64;\r\n      case TypeKind.USIZE: return this.size == 64 ? Type.usize64 : Type.usize32;\r\n      case TypeKind.BOOL:\r\n      default: return Type.i32;\r\n    }\r\n  }\r\n\r\n  /** Tests if this is a managed type that needs GC hooks. */\r\n  isManaged(program: Program): bool {\r\n    if (program.hasGC) {\r\n      let classReference = this.classReference;\r\n      return classReference !== null && !classReference.hasDecorator(DecoratorFlags.UNMANAGED);\r\n    }\r\n    return false;\r\n  }\r\n\r\n  /** Computes the sign-extending shift in the target type. */\r\n  computeSmallIntegerShift(targetType: Type): u32 {\r\n    return targetType.size - this.size;\r\n  }\r\n\r\n  /** Computes the truncating mask in the target type. */\r\n  computeSmallIntegerMask(targetType: Type): u32 {\r\n    var size = this.is(TypeFlags.UNSIGNED) ? this.size : this.size - 1;\r\n    return ~0 >>> (targetType.size - size);\r\n  }\r\n\r\n  /** Tests if this type has (all of) the specified flags. */\r\n  is(flags: TypeFlags): bool { return (this.flags & flags) == flags; }\r\n  /** Tests if this type has any of the specified flags. */\r\n  isAny(flags: TypeFlags): bool { return (this.flags & flags) != 0; }\r\n\r\n  /** Composes a class type from this type and a class. */\r\n  asClass(classType: Class): Type {\r\n    assert(this.kind == TypeKind.USIZE && !this.classReference);\r\n    var ret = new Type(this.kind, this.flags & ~TypeFlags.VALUE | TypeFlags.REFERENCE, this.size);\r\n    ret.classReference = classType;\r\n    return ret;\r\n  }\r\n\r\n  /** Composes a function type from this type and a function. */\r\n  asFunction(signature: Signature): Type {\r\n    assert(this.kind == TypeKind.U32 && !this.signatureReference);\r\n    var ret = new Type(this.kind, this.flags & ~TypeFlags.VALUE | TypeFlags.REFERENCE, this.size);\r\n    ret.signatureReference = signature;\r\n    return ret;\r\n  }\r\n\r\n  /** Composes the respective nullable type of this type. */\r\n  asNullable(): Type {\r\n    assert(this.is(TypeFlags.REFERENCE));\r\n    if (!this.cachedNullableType) {\r\n      assert(!this.is(TypeFlags.NULLABLE));\r\n      this.cachedNullableType = new Type(this.kind, this.flags | TypeFlags.NULLABLE, this.size);\r\n      this.cachedNullableType.nonNullableType = this;\r\n      this.cachedNullableType.classReference = this.classReference;       // either a class reference\r\n      this.cachedNullableType.signatureReference = this.signatureReference; // or a function reference\r\n    }\r\n    return this.cachedNullableType;\r\n  }\r\n\r\n  /** Tests if a value of this type is assignable to a target of the specified type. */\r\n  isAssignableTo(target: Type, signednessIsRelevant: bool = false): bool {\r\n    var currentClass: Class | null;\r\n    var targetClass: Class | null;\r\n    var currentFunction: Signature | null;\r\n    var targetFunction: Signature | null;\r\n    if (this.is(TypeFlags.REFERENCE)) {\r\n      if (target.is(TypeFlags.REFERENCE)) {\r\n        if (!this.is(TypeFlags.NULLABLE) || target.is(TypeFlags.NULLABLE)) {\r\n          if (currentClass = this.classReference) {\r\n            if (targetClass = target.classReference) {\r\n              return currentClass.isAssignableTo(targetClass);\r\n            }\r\n          } else if (currentFunction = this.signatureReference) {\r\n            if (targetFunction = target.signatureReference) {\r\n              return currentFunction.isAssignableTo(targetFunction);\r\n            }\r\n          }\r\n        }\r\n      }\r\n    } else if (!target.is(TypeFlags.REFERENCE)) {\r\n      if (this.is(TypeFlags.INTEGER)) {\r\n        if (target.is(TypeFlags.INTEGER)) {\r\n          if (!signednessIsRelevant || this.is(TypeFlags.SIGNED) == target.is(TypeFlags.SIGNED)) {\r\n            return this.size <= target.size;\r\n          }\r\n        } else if (target.kind == TypeKind.F32) {\r\n          return this.size <= 23; // mantissa bits\r\n        } else if (target.kind == TypeKind.F64) {\r\n          return this.size <= 52; // ^\r\n        }\r\n      } else if (this.is(TypeFlags.FLOAT)) {\r\n        if (target.is(TypeFlags.FLOAT)) {\r\n          return this.size <= target.size;\r\n        }\r\n      }\r\n    }\r\n    return false;\r\n  }\r\n\r\n  /** Determines the common compatible type of two types, if any. */\r\n  static commonCompatible(left: Type, right: Type, signednessIsImportant: bool): Type | null {\r\n    if (right.isAssignableTo(left, signednessIsImportant)) return left;\r\n    else if (left.isAssignableTo(right, signednessIsImportant)) return right;\r\n    return null;\r\n  }\r\n\r\n  /** Converts this type to its TypeScript representation. */\r\n  toString(kindOnly: bool = false): string {\r\n    if (!kindOnly && this.is(TypeFlags.REFERENCE)) {\r\n      let classReference = this.classReference;\r\n      if (classReference) {\r\n        return this.is(TypeFlags.NULLABLE)\r\n          ? classReference.toString() + \" | null\"\r\n          : classReference.toString();\r\n      }\r\n      let signatureReference = this.signatureReference;\r\n      if (signatureReference) {\r\n        return this.is(TypeFlags.NULLABLE)\r\n          ? \"(\" + signatureReference.toString(true) + \") | null\"\r\n          : signatureReference.toString(true);\r\n      }\r\n      assert(false);\r\n    }\r\n    switch (this.kind) {\r\n      case TypeKind.I8: return \"i8\";\r\n      case TypeKind.I16: return \"i16\";\r\n      case TypeKind.I32: return \"i32\";\r\n      case TypeKind.I64: return \"i64\";\r\n      case TypeKind.ISIZE: return \"isize\";\r\n      case TypeKind.U8: return \"u8\";\r\n      case TypeKind.U16: return \"u16\";\r\n      case TypeKind.U32: return \"u32\";\r\n      case TypeKind.U64: return \"u64\";\r\n      case TypeKind.USIZE: return \"usize\";\r\n      case TypeKind.BOOL: return \"bool\";\r\n      case TypeKind.F32: return \"f32\";\r\n      case TypeKind.F64: return \"f64\";\r\n      default: assert(false);\r\n      case TypeKind.VOID: return \"void\";\r\n    }\r\n  }\r\n\r\n  // Binaryen specific\r\n\r\n  /** Converts this type to its respective native type. */\r\n  toNativeType(): NativeType {\r\n    switch (this.kind) {\r\n      default: return NativeType.I32;\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return NativeType.I64;\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: return this.size == 64 ? NativeType.I64 : NativeType.I32;\r\n      case TypeKind.F32: return NativeType.F32;\r\n      case TypeKind.F64: return NativeType.F64;\r\n      case TypeKind.VOID:  return NativeType.None;\r\n    }\r\n  }\r\n\r\n  /** Converts this type to its native `0` value. */\r\n  toNativeZero(module: Module): ExpressionRef {\r\n    switch (this.kind) {\r\n      case TypeKind.VOID: assert(false);\r\n      default: return module.createI32(0);\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: if (this.size != 64) return module.createI32(0);\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return module.createI64(0);\r\n      case TypeKind.F32: return module.createF32(0);\r\n      case TypeKind.F64: return module.createF64(0);\r\n    }\r\n  }\r\n\r\n  /** Converts this type to its native `1` value. */\r\n  toNativeOne(module: Module): ExpressionRef {\r\n    switch (this.kind) {\r\n      case TypeKind.VOID: assert(false);\r\n      default: return module.createI32(1);\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: if (this.size != 64) return module.createI32(1);\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return module.createI64(1);\r\n      case TypeKind.F32: return module.createF32(1);\r\n      case TypeKind.F64: return module.createF64(1);\r\n    }\r\n  }\r\n\r\n  /** Converts this type to its native `-1` value. */\r\n  toNativeNegOne(module: Module): ExpressionRef {\r\n    switch (this.kind) {\r\n      case TypeKind.VOID: assert(false);\r\n      default: return module.createI32(-1);\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: if (this.size != 64) return module.createI32(-1);\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return module.createI64(-1, -1);\r\n      case TypeKind.F32: return module.createF32(-1);\r\n      case TypeKind.F64: return module.createF64(-1);\r\n    }\r\n  }\r\n\r\n  /** Converts this type to its signature string. */\r\n  toSignatureString(): string {\r\n    switch (this.kind) {\r\n      default: return \"i\";\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: return \"I\";\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: return this.size == 64 ? \"I\" : \"i\";\r\n      case TypeKind.F32: return \"f\";\r\n      case TypeKind.F64: return \"F\";\r\n      case TypeKind.VOID: return \"v\";\r\n    }\r\n  }\r\n\r\n  // Types\r\n\r\n  /** An 8-bit signed integer. */\r\n  static readonly i8: Type  = new Type(TypeKind.I8,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,   8\r\n  );\r\n\r\n  /** A 16-bit signed integer. */\r\n  static readonly i16: Type = new Type(TypeKind.I16,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  16\r\n  );\r\n\r\n  /** A 32-bit signed integer. */\r\n  static readonly i32: Type = new Type(TypeKind.I32,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit signed integer. */\r\n  static readonly i64: Type = new Type(TypeKind.I64,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** A 32-bit signed size. WASM32 only. */\r\n  static readonly isize32: Type = new Type(TypeKind.ISIZE,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.POINTER  |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit signed size. WASM64 only. */\r\n  static readonly isize64: Type = new Type(TypeKind.ISIZE,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.POINTER  |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** An 8-bit unsigned integer. */\r\n  static readonly u8: Type = new Type(TypeKind.U8,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,   8\r\n  );\r\n\r\n  /** A 16-bit unsigned integer. */\r\n  static readonly u16: Type = new Type(TypeKind.U16,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  16\r\n  );\r\n\r\n  /** A 32-bit unsigned integer. */\r\n  static readonly u32: Type = new Type(TypeKind.U32,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit unsigned integer. */\r\n  static readonly u64: Type = new Type(TypeKind.U64,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** A 32-bit unsigned size. WASM32 only. */\r\n  static readonly usize32: Type = new Type(TypeKind.USIZE,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.POINTER  |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit unsigned size. WASM64 only. */\r\n  static readonly usize64: Type = new Type(TypeKind.USIZE,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.POINTER  |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** A 1-bit unsigned integer. */\r\n  static readonly bool: Type = new Type(TypeKind.BOOL,\r\n    TypeFlags.UNSIGNED |\r\n    TypeFlags.SHORT    |\r\n    TypeFlags.INTEGER  |\r\n    TypeFlags.VALUE,   1\r\n  );\r\n\r\n  /** A 32-bit float. */\r\n  static readonly f32: Type = new Type(TypeKind.F32,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.FLOAT    |\r\n    TypeFlags.VALUE,  32\r\n  );\r\n\r\n  /** A 64-bit float. */\r\n  static readonly f64: Type = new Type(TypeKind.F64,\r\n    TypeFlags.SIGNED   |\r\n    TypeFlags.LONG     |\r\n    TypeFlags.FLOAT    |\r\n    TypeFlags.VALUE,  64\r\n  );\r\n\r\n  /** No return type. */\r\n  static readonly void: Type = new Type(TypeKind.VOID, TypeFlags.NONE, 0);\r\n}\r\n\r\n/** Converts an array of types to an array of native types. */\r\nexport function typesToNativeTypes(types: Type[]): NativeType[] {\r\n  var numTypes = types.length;\r\n  var ret = new Array<NativeType>(numTypes);\r\n  for (let i = 0; i < numTypes; ++i) ret[i] = types[i].toNativeType();\r\n  return ret;\r\n}\r\n\r\n/** Converts an array of types to its combined string representation. */\r\nexport function typesToString(types: Type[]): string {\r\n  var numTypes = types.length;\r\n  if (!numTypes) return \"\";\r\n  var sb = new Array<string>(numTypes);\r\n  for (let i = 0; i < numTypes; ++i) sb[i] = types[i].toString();\r\n  return sb.join(\",\");\r\n}\r\n\r\n/** Represents a fully resolved function signature. */\r\nexport class Signature {\r\n\r\n  /** Parameter types, if any, excluding `this`. */\r\n  parameterTypes: Type[];\r\n  /** Parameter names, if known, excluding `this`. */\r\n  parameterNames: string[] | null;\r\n  /** Number of required parameters excluding `this`. Other parameters are considered optional. */\r\n  requiredParameters: i32;\r\n  /** Return type. */\r\n  returnType: Type;\r\n  /** This type, if an instance signature. */\r\n  thisType: Type | null;\r\n  /** Whether the last parameter is a rest parameter. */\r\n  hasRest: bool;\r\n  /** Cached {@link FunctionTarget}. */\r\n  cachedFunctionTarget: FunctionTarget | null = null;\r\n  /** Respective function type. */\r\n  type: Type;\r\n\r\n  /** Constructs a new signature. */\r\n  constructor(\r\n    parameterTypes: Type[] | null = null,\r\n    returnType: Type | null = null,\r\n    thisType: Type | null = null\r\n  ) {\r\n    this.parameterTypes = parameterTypes ? parameterTypes : [];\r\n    this.parameterNames = null;\r\n    this.requiredParameters = 0;\r\n    this.returnType = returnType ? returnType : Type.void;\r\n    this.thisType = thisType;\r\n    this.hasRest = false;\r\n    this.type = Type.u32.asFunction(this);\r\n  }\r\n\r\n  /** Gets the known or, alternatively, generic parameter name at the specified index. */\r\n  getParameterName(index: i32): string {\r\n    var parameterNames = this.parameterNames;\r\n    return parameterNames && parameterNames.length > index\r\n      ? parameterNames[index]\r\n      : getDefaultParameterName(index);\r\n  }\r\n\r\n  /** Tests if a value of this function type is assignable to a target of the specified function type. */\r\n  isAssignableTo(target: Signature): bool {\r\n    // TODO: maybe cache results?\r\n\r\n    // check `this` type\r\n    var thisThisType = this.thisType;\r\n    var targetThisType = target.thisType;\r\n    if (thisThisType) {\r\n      if (!(targetThisType && thisThisType.isAssignableTo(targetThisType))) return false;\r\n    } else if (targetThisType) {\r\n      return false;\r\n    }\r\n\r\n    // check rest parameter\r\n    if (this.hasRest != target.hasRest) return false; // TODO\r\n\r\n    // check parameter types\r\n    var thisParameterTypes = this.parameterTypes;\r\n    var targetParameterTypes = target.parameterTypes;\r\n    var numParameters = thisParameterTypes.length;\r\n    if (numParameters != targetParameterTypes.length) return false;\r\n    for (let i = 0; i < numParameters; ++i) {\r\n      let thisParameterType = thisParameterTypes[i];\r\n      let targetParameterType = targetParameterTypes[i];\r\n      if (!thisParameterType.isAssignableTo(targetParameterType)) return false;\r\n    }\r\n\r\n    // check return type\r\n    var thisReturnType = this.returnType;\r\n    var targetReturnType = target.returnType;\r\n    return thisReturnType == targetReturnType || thisReturnType.isAssignableTo(targetReturnType);\r\n  }\r\n\r\n  /** Converts a signature to a function type string. */\r\n  static makeSignatureString(parameterTypes: Type[] | null, returnType: Type, thisType: Type | null = null): string {\r\n    var sb = [];\r\n    if (thisType) sb.push(thisType.toSignatureString());\r\n    if (parameterTypes) {\r\n      for (let i = 0, k = parameterTypes.length; i < k; ++i) sb.push(parameterTypes[i].toSignatureString());\r\n    }\r\n    sb.push(returnType.toSignatureString());\r\n    return sb.join(\"\");\r\n  }\r\n\r\n  /** Converts this signature to a function type string. */\r\n  toSignatureString(): string {\r\n    return Signature.makeSignatureString(this.parameterTypes, this.returnType, this.thisType);\r\n  }\r\n\r\n  /** Converts this signature to a string. */\r\n  toString(includeThis: bool = false): string {\r\n    var sb = new Array<string>();\r\n    sb.push(\"(\");\r\n    var index = 0;\r\n    var thisType = this.thisType;\r\n    if (thisType) {\r\n      if (includeThis) {\r\n        sb.push(\"this: \");\r\n        sb.push(thisType.toString());\r\n        index = 1;\r\n      }\r\n    }\r\n    var parameters = this.parameterTypes;\r\n    var numParameters = parameters.length;\r\n    if (numParameters) {\r\n      let names = this.parameterNames;\r\n      let numNames = names ? names.length : 0;\r\n      let optionalStart = this.requiredParameters;\r\n      let restIndex = this.hasRest ? numParameters - 1 : -1;\r\n      for (let i = 0; i < numParameters; ++i, ++index) {\r\n        if (index) sb.push(\", \");\r\n        if (i == restIndex) sb.push(\"...\");\r\n        if (i < numNames) sb.push((<string[]>names)[i]);\r\n        else sb.push(getDefaultParameterName(i));\r\n        if (i >= optionalStart && i != restIndex) sb.push(\"?: \");\r\n        else sb.push(\": \");\r\n        sb.push(parameters[i].toString());\r\n      }\r\n    }\r\n    sb.push(\") => \");\r\n    sb.push(this.returnType.toString());\r\n    return sb.join(\"\");\r\n  }\r\n}\r\n\r\n// helpers\r\n\r\n// Cached default parameter names used where names are unknown.\r\nvar cachedDefaultParameterNames: string[] | null = null;\r\n\r\n/** Gets the cached default parameter name for the specified index. */\r\nexport function getDefaultParameterName(index: i32): string {\r\n  if (!cachedDefaultParameterNames) cachedDefaultParameterNames = [];\r\n  for (let i = cachedDefaultParameterNames.length; i <= index; ++i) {\r\n    cachedDefaultParameterNames.push(\"arg$\" + i.toString(10));\r\n  }\r\n  return cachedDefaultParameterNames[index - 1];\r\n}\r\n","/**\r\n * A TypeScript tokenizer modified for AssemblyScript.\r\n *\r\n * Skips over trivia and provides a general mark/reset mechanism for the parser to utilize on\r\n * ambiguous tokens.\r\n *\r\n * @module tokenizer\r\n *//***/\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  DiagnosticMessage,\r\n  DiagnosticEmitter\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Source,\r\n  CommentKind\r\n} from \"./ast\";\r\n\r\nimport {\r\n  CharCode,\r\n  isLineBreak,\r\n  isWhiteSpace,\r\n  isIdentifierStart,\r\n  isIdentifierPart,\r\n  isDecimalDigit,\r\n  isOctalDigit,\r\n  isKeywordCharacter\r\n} from \"./util\";\r\n\r\n/** Named token types. */\r\nexport enum Token {\r\n\r\n  // keywords\r\n  // discarded: ANY, BOOLEAN, NEVER, NUMBER, STRING, SYMBOL, UNDEFINED, LESSTHAN_SLASH\r\n\r\n  ABSTRACT,\r\n  AS,\r\n  ASYNC,\r\n  AWAIT,        // ES2017\r\n  BREAK,        // ES2017\r\n  CASE,         // ES2017\r\n  CATCH,        // ES2017\r\n  CLASS,        // ES2017\r\n  CONST,        // ES2017\r\n  CONTINUE,     // ES2017\r\n  CONSTRUCTOR,\r\n  DEBUGGER,     // ES2017\r\n  DECLARE,\r\n  DEFAULT,      // ES2017\r\n  DELETE,       // ES2017\r\n  DO,           // ES2017\r\n  ELSE,         // ES2017\r\n  ENUM,         // ES2017 future\r\n  EXPORT,       // ES2017\r\n  EXTENDS,      // ES2017\r\n  FALSE,        // ES\r\n  FINALLY,      // ES2017\r\n  FOR,          // ES2017\r\n  FROM,         // AS possible identifier\r\n  FUNCTION,     // ES2017\r\n  GET,\r\n  IF,           // ES2017\r\n  IMPLEMENTS,   // ES2017 non-lexical\r\n  IMPORT,       // ES2017\r\n  IN,           // ES2017\r\n  INSTANCEOF,   // ES2017\r\n  INTERFACE,    // ES2017 non-lexical\r\n  IS,\r\n  KEYOF,\r\n  LET,          // ES2017 non-lexical\r\n  MODULE,       // AS possible identifier\r\n  NAMESPACE,    // AS possible identifier\r\n  NEW,          // ES2017\r\n  NULL,         // ES\r\n  OF,\r\n  PACKAGE,      // ES2017 non-lexical\r\n  PRIVATE,      // ES2017 non-lexical\r\n  PROTECTED,    // ES2017 non-lexical\r\n  PUBLIC,       // ES2017 non-lexical\r\n  READONLY,\r\n  RETURN,       // ES2017\r\n  SET,\r\n  STATIC,       // ES2017 non-lexical\r\n  SUPER,        // ES2017\r\n  SWITCH,       // ES2017\r\n  THIS,         // ES2017\r\n  THROW,        // ES2017\r\n  TRUE,         // ES\r\n  TRY,          // ES2017\r\n  TYPE,         // AS possible identifier\r\n  TYPEOF,       // ES2017\r\n  VAR,          // ES2017\r\n  VOID,         // ES2017\r\n  WHILE,        // ES2017\r\n  WITH,         // ES2017\r\n  YIELD,        // ES2017\r\n\r\n  // punctuation\r\n\r\n  OPENBRACE,\r\n  CLOSEBRACE,\r\n  OPENPAREN,\r\n  CLOSEPAREN,\r\n  OPENBRACKET,\r\n  CLOSEBRACKET,\r\n  DOT,\r\n  DOT_DOT_DOT,\r\n  SEMICOLON,\r\n  COMMA,\r\n  LESSTHAN,\r\n  GREATERTHAN,\r\n  LESSTHAN_EQUALS,\r\n  GREATERTHAN_EQUALS,\r\n  EQUALS_EQUALS,\r\n  EXCLAMATION_EQUALS,\r\n  EQUALS_EQUALS_EQUALS,\r\n  EXCLAMATION_EQUALS_EQUALS,\r\n  EQUALS_GREATERTHAN,\r\n  PLUS,\r\n  MINUS,\r\n  ASTERISK_ASTERISK,\r\n  ASTERISK,\r\n  SLASH,\r\n  PERCENT,\r\n  PLUS_PLUS,\r\n  MINUS_MINUS,\r\n  LESSTHAN_LESSTHAN,\r\n  GREATERTHAN_GREATERTHAN,\r\n  GREATERTHAN_GREATERTHAN_GREATERTHAN,\r\n  AMPERSAND,\r\n  BAR,\r\n  CARET,\r\n  EXCLAMATION,\r\n  TILDE,\r\n  AMPERSAND_AMPERSAND,\r\n  BAR_BAR,\r\n  QUESTION,\r\n  COLON,\r\n  EQUALS,\r\n  PLUS_EQUALS,\r\n  MINUS_EQUALS,\r\n  ASTERISK_EQUALS,\r\n  ASTERISK_ASTERISK_EQUALS,\r\n  SLASH_EQUALS,\r\n  PERCENT_EQUALS,\r\n  LESSTHAN_LESSTHAN_EQUALS,\r\n  GREATERTHAN_GREATERTHAN_EQUALS,\r\n  GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS,\r\n  AMPERSAND_EQUALS,\r\n  BAR_EQUALS,\r\n  CARET_EQUALS,\r\n  AT,\r\n\r\n  // literals\r\n\r\n  IDENTIFIER,\r\n  STRINGLITERAL,\r\n  INTEGERLITERAL,\r\n  FLOATLITERAL,\r\n\r\n  // meta\r\n\r\n  INVALID,\r\n  ENDOFFILE\r\n}\r\n\r\nexport enum IdentifierHandling {\r\n  DEFAULT,\r\n  PREFER,\r\n  ALWAYS\r\n}\r\n\r\nexport function tokenFromKeyword(text: string): Token {\r\n  assert(text.length);\r\n  switch (text.charCodeAt(0)) {\r\n    case CharCode.a: {\r\n      switch (text) {\r\n        case \"abstract\": return Token.ABSTRACT;\r\n        case \"as\": return Token.AS;\r\n        case \"async\": return Token.ASYNC;\r\n        case \"await\": return Token.AWAIT;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.b: {\r\n      switch (text) {\r\n        case \"break\": return Token.BREAK;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.c: {\r\n      switch (text) {\r\n        case \"case\": return Token.CASE;\r\n        case \"catch\": return Token.CATCH;\r\n        case \"class\": return Token.CLASS;\r\n        case \"continue\": return Token.CONTINUE;\r\n        case \"const\": return Token.CONST;\r\n        case \"constructor\": return Token.CONSTRUCTOR;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.d: {\r\n      switch (text) {\r\n        case \"debugger\": return Token.DEBUGGER;\r\n        case \"declare\": return Token.DECLARE;\r\n        case \"default\": return Token.DEFAULT;\r\n        case \"delete\": return Token.DELETE;\r\n        case \"do\": return Token.DO;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.e: {\r\n      switch (text) {\r\n        case \"else\": return Token.ELSE;\r\n        case \"enum\": return Token.ENUM;\r\n        case \"export\": return Token.EXPORT;\r\n        case \"extends\": return Token.EXTENDS;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.f: {\r\n      switch (text) {\r\n        case \"false\": return Token.FALSE;\r\n        case \"finally\": return Token.FINALLY;\r\n        case \"for\": return Token.FOR;\r\n        case \"from\": return Token.FROM;\r\n        case \"function\": return Token.FUNCTION;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.g: {\r\n      switch (text) {\r\n        case \"get\": return Token.GET;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.i: {\r\n      switch (text) {\r\n        case \"if\": return Token.IF;\r\n        case \"implements\": return Token.IMPLEMENTS;\r\n        case \"import\": return Token.IMPORT;\r\n        case \"in\": return Token.IN;\r\n        case \"instanceof\": return Token.INSTANCEOF;\r\n        case \"interface\": return Token.INTERFACE;\r\n        case \"is\": return Token.IS;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.k: {\r\n      switch (text) {\r\n        case \"keyof\": return Token.KEYOF;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.l: {\r\n      switch (text) {\r\n        case \"let\": return Token.LET;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.m: {\r\n      switch (text) {\r\n        case \"module\": return Token.MODULE;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.n: {\r\n      switch (text) {\r\n        case \"namespace\": return Token.NAMESPACE;\r\n        case \"new\": return Token.NEW;\r\n        case \"null\": return Token.NULL;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.o: {\r\n      switch (text) {\r\n        case \"of\": return Token.OF;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.p: {\r\n      switch (text) {\r\n        case \"package\": return Token.PACKAGE;\r\n        case \"private\": return Token.PRIVATE;\r\n        case \"protected\": return Token.PROTECTED;\r\n        case \"public\": return Token.PUBLIC;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.r: {\r\n      switch (text) {\r\n        case \"readonly\": return Token.READONLY;\r\n        case \"return\": return Token.RETURN;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.s: {\r\n      switch (text) {\r\n        case \"set\": return Token.SET;\r\n        case \"static\": return Token.STATIC;\r\n        case \"super\": return Token.SUPER;\r\n        case \"switch\": return Token.SWITCH;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.t: {\r\n      switch (text) {\r\n        case \"this\": return Token.THIS;\r\n        case \"throw\": return Token.THROW;\r\n        case \"true\": return Token.TRUE;\r\n        case \"try\": return Token.TRY;\r\n        case \"type\": return Token.TYPE;\r\n        case \"typeof\": return Token.TYPEOF;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.v: {\r\n      switch (text) {\r\n        case \"var\": return Token.VAR;\r\n        case \"void\": return Token.VOID;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.w: {\r\n      switch (text) {\r\n        case \"while\": return Token.WHILE;\r\n        case \"with\": return Token.WITH;\r\n      }\r\n      break;\r\n    }\r\n    case CharCode.y: {\r\n      switch (text) {\r\n        case \"yield\": return Token.YIELD;\r\n      }\r\n      break;\r\n    }\r\n  }\r\n  return Token.INVALID;\r\n}\r\n\r\nexport function tokenIsAlsoIdentifier(token: Token): bool {\r\n  switch (token) {\r\n    case Token.ABSTRACT:\r\n    case Token.AS:\r\n    case Token.CONSTRUCTOR:\r\n    case Token.DECLARE:\r\n    case Token.DELETE:\r\n    case Token.FROM:\r\n    case Token.FOR:\r\n    case Token.GET:\r\n    case Token.IS:\r\n    case Token.KEYOF:\r\n    case Token.MODULE:\r\n    case Token.NAMESPACE:\r\n    case Token.READONLY:\r\n    case Token.SET:\r\n    case Token.TYPE: return true;\r\n    default: return false;\r\n  }\r\n}\r\n\r\nexport function operatorTokenToString(token: Token): string {\r\n  switch (token) {\r\n    case Token.DELETE: return \"delete\";\r\n    case Token.IN: return \"in\";\r\n    case Token.INSTANCEOF: return \"instanceof\";\r\n    case Token.NEW: return \"new\";\r\n    case Token.TYPEOF: return \"typeof\";\r\n    case Token.VOID: return \"void\";\r\n    case Token.YIELD: return \"yield\";\r\n    case Token.DOT_DOT_DOT: return \"...\";\r\n    case Token.COMMA: return \",\";\r\n    case Token.LESSTHAN: return \"<\";\r\n    case Token.GREATERTHAN: return \">\";\r\n    case Token.LESSTHAN_EQUALS: return \"<=\";\r\n    case Token.GREATERTHAN_EQUALS: return \">=\";\r\n    case Token.EQUALS_EQUALS: return \"==\";\r\n    case Token.EXCLAMATION_EQUALS: return \"!=\";\r\n    case Token.EQUALS_EQUALS_EQUALS: return \"===\";\r\n    case Token.EXCLAMATION_EQUALS_EQUALS: return \"!==\";\r\n    case Token.PLUS: return \"+\";\r\n    case Token.MINUS: return \"-\";\r\n    case Token.ASTERISK_ASTERISK: return \"**\";\r\n    case Token.ASTERISK: return \"*\";\r\n    case Token.SLASH: return \"/\";\r\n    case Token.PERCENT: return \"%\";\r\n    case Token.PLUS_PLUS: return \"++\";\r\n    case Token.MINUS_MINUS: return \"--\";\r\n    case Token.LESSTHAN_LESSTHAN: return \"<<\";\r\n    case Token.GREATERTHAN_GREATERTHAN: return \">>\";\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN: return \">>>\";\r\n    case Token.AMPERSAND: return \"&\";\r\n    case Token.BAR: return \"|\";\r\n    case Token.CARET: return \"^\";\r\n    case Token.EXCLAMATION: return \"!\";\r\n    case Token.TILDE: return \"~\";\r\n    case Token.AMPERSAND_AMPERSAND: return \"&&\";\r\n    case Token.BAR_BAR: return \"||\";\r\n    case Token.EQUALS: return \"=\";\r\n    case Token.PLUS_EQUALS: return \"+=\";\r\n    case Token.MINUS_EQUALS: return \"-=\";\r\n    case Token.ASTERISK_EQUALS: return \"*=\";\r\n    case Token.ASTERISK_ASTERISK_EQUALS: return \"**=\";\r\n    case Token.SLASH_EQUALS: return \"/=\";\r\n    case Token.PERCENT_EQUALS: return \"%=\";\r\n    case Token.LESSTHAN_LESSTHAN_EQUALS: return \"<<=\";\r\n    case Token.GREATERTHAN_GREATERTHAN_EQUALS: return \">>=\";\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS: return \">>>=\";\r\n    case Token.AMPERSAND_EQUALS: return \"&=\";\r\n    case Token.BAR_EQUALS: return \"|=\";\r\n    case Token.CARET_EQUALS: return \"^=\";\r\n    default: {\r\n      assert(false);\r\n      return \"\";\r\n    }\r\n  }\r\n}\r\n\r\nexport class Range {\r\n\r\n  source: Source;\r\n  start: i32;\r\n  end: i32;\r\n\r\n  // TODO: set these while tokenizing\r\n  // line: i32;\r\n  // column: i32;\r\n\r\n  constructor(source: Source, start: i32, end: i32) {\r\n    this.source = source;\r\n    this.start = start;\r\n    this.end = end;\r\n  }\r\n\r\n  static join(a: Range, b: Range): Range {\r\n    if (a.source != b.source) throw new Error(\"source mismatch\");\r\n    return new Range(a.source,\r\n      a.start < b.start ? a.start : b.start,\r\n      a.end > b.end ? a.end : b.end\r\n    );\r\n  }\r\n\r\n  get atStart(): Range {\r\n    return new Range(this.source, this.start, this.start);\r\n  }\r\n  get atEnd(): Range {\r\n    return new Range(this.source, this.end, this.end);\r\n  }\r\n\r\n  get line(): i32 {\r\n    var text = this.source.text;\r\n    var line = 1;\r\n    for (let pos = this.start; pos >= 0; --pos) {\r\n      if (text.charCodeAt(pos) == CharCode.LINEFEED) line++;\r\n    }\r\n    return line;\r\n  }\r\n\r\n  get column(): i32 {\r\n    var text = this.source.text;\r\n    var column = 0;\r\n    for (let pos = this.start - 1; pos >= 0; --pos) {\r\n      if (text.charCodeAt(pos) == CharCode.LINEFEED) break;\r\n      ++column;\r\n    }\r\n    return column;\r\n  }\r\n\r\n  toString(): string {\r\n    return this.source.text.substring(this.start, this.end);\r\n  }\r\n\r\n  debugInfoRef: usize = 0;\r\n}\r\n\r\ndeclare function parseFloat(str: string): f64;\r\n\r\n/** Handler for intercepting comments while tokenizing. */\r\nexport type CommentHandler = (kind: CommentKind, text: string, range: Range) => void;\r\n\r\n/** Tokenizes a source to individual {@link Token}s. */\r\nexport class Tokenizer extends DiagnosticEmitter {\r\n\r\n  source: Source;\r\n  end: i32 = 0;\r\n\r\n  pos: i32 = 0;\r\n  token: Token = -1;\r\n  tokenPos: i32 = 0;\r\n\r\n  nextToken: Token = -1;\r\n  nextTokenPos: i32 = 0;\r\n  nextTokenOnNewLine: bool = false;\r\n\r\n  onComment: CommentHandler | null = null;\r\n\r\n  /** Constructs a new tokenizer. */\r\n  constructor(source: Source, diagnostics: DiagnosticMessage[] | null = null) {\r\n    super(diagnostics);\r\n    this.source = source;\r\n    this.pos = 0;\r\n    this.end = source.text.length;\r\n    this.diagnostics = diagnostics ? diagnostics : new Array();\r\n\r\n    var text = source.text;\r\n\r\n    // skip bom\r\n    if (\r\n      this.pos < this.end &&\r\n      text.charCodeAt(this.pos) == CharCode.BYTEORDERMARK\r\n    ) {\r\n      ++this.pos;\r\n    }\r\n\r\n    // skip shebang\r\n    if (\r\n      this.pos + 1 < this.end &&\r\n      text.charCodeAt(this.pos) == CharCode.HASH &&\r\n      text.charCodeAt(this.pos + 1) == CharCode.EXCLAMATION\r\n    ) {\r\n      this.pos += 2;\r\n      while (\r\n        this.pos < this.end &&\r\n        text.charCodeAt(this.pos) != CharCode.LINEFEED\r\n      ) {\r\n        ++this.pos;\r\n      }\r\n      // 'next' now starts at lf or eof\r\n    }\r\n  }\r\n\r\n  next(identifierHandling: IdentifierHandling = IdentifierHandling.DEFAULT): Token {\r\n    this.nextToken = -1;\r\n    return this.token = this.unsafeNext(identifierHandling);\r\n  }\r\n\r\n  private unsafeNext(\r\n    identifierHandling: IdentifierHandling = IdentifierHandling.DEFAULT,\r\n    maxTokenLength: i32 = i32.MAX_VALUE\r\n  ): Token {\r\n    var text = this.source.text;\r\n    while (this.pos < this.end) {\r\n      this.tokenPos = this.pos;\r\n      let c = text.charCodeAt(this.pos);\r\n      switch (c) {\r\n        case CharCode.CARRIAGERETURN: {\r\n          if (!(\r\n            ++this.pos < this.end &&\r\n            text.charCodeAt(this.pos) == CharCode.LINEFEED\r\n          )) break;\r\n          // otherwise fall-through\r\n        }\r\n        case CharCode.LINEFEED:\r\n        case CharCode.TAB:\r\n        case CharCode.VERTICALTAB:\r\n        case CharCode.FORMFEED:\r\n        case CharCode.SPACE: {\r\n          ++this.pos;\r\n          break;\r\n        }\r\n        case CharCode.EXCLAMATION: {\r\n          ++this.pos;\r\n          if (\r\n            maxTokenLength > 1 && this.pos < this.end &&\r\n            text.charCodeAt(this.pos) == CharCode.EQUALS\r\n          ) {\r\n            ++this.pos;\r\n            if (\r\n              maxTokenLength > 2 && this.pos < this.end &&\r\n              text.charCodeAt(this.pos) == CharCode.EQUALS\r\n            ) {\r\n              ++this.pos;\r\n              return Token.EXCLAMATION_EQUALS_EQUALS;\r\n            }\r\n            return Token.EXCLAMATION_EQUALS;\r\n          }\r\n          return Token.EXCLAMATION;\r\n        }\r\n        case CharCode.DOUBLEQUOTE:\r\n        case CharCode.SINGLEQUOTE:\r\n        case CharCode.BACKTICK: { // TODO\r\n          return Token.STRINGLITERAL; // expects a call to readString\r\n        }\r\n        case CharCode.PERCENT: {\r\n          ++this.pos;\r\n          if (\r\n            maxTokenLength > 1 && this.pos < this.end &&\r\n            text.charCodeAt(this.pos) == CharCode.EQUALS\r\n          ) {\r\n            ++this.pos;\r\n            return Token.PERCENT_EQUALS;\r\n          }\r\n          return Token.PERCENT;\r\n        }\r\n        case CharCode.AMPERSAND: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.AMPERSAND) {\r\n              ++this.pos;\r\n              return Token.AMPERSAND_AMPERSAND;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.AMPERSAND_EQUALS;\r\n            }\r\n          }\r\n          return Token.AMPERSAND;\r\n        }\r\n        case CharCode.OPENPAREN: {\r\n          ++this.pos;\r\n          return Token.OPENPAREN;\r\n        }\r\n        case CharCode.CLOSEPAREN: {\r\n          ++this.pos;\r\n          return Token.CLOSEPAREN;\r\n        }\r\n        case CharCode.ASTERISK: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.ASTERISK_EQUALS;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.ASTERISK) {\r\n              ++this.pos;\r\n              if (\r\n                maxTokenLength > 2 && this.pos < this.end &&\r\n                text.charCodeAt(this.pos) == CharCode.EQUALS\r\n              ) {\r\n                ++this.pos;\r\n                return Token.ASTERISK_ASTERISK_EQUALS;\r\n              }\r\n              return Token.ASTERISK_ASTERISK;\r\n            }\r\n          }\r\n          return Token.ASTERISK;\r\n        }\r\n        case CharCode.PLUS: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.PLUS) {\r\n              ++this.pos;\r\n              return Token.PLUS_PLUS;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.PLUS_EQUALS;\r\n            }\r\n          }\r\n          return Token.PLUS;\r\n        }\r\n        case CharCode.COMMA: {\r\n          ++this.pos;\r\n          return Token.COMMA;\r\n        }\r\n        case CharCode.MINUS: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.MINUS) {\r\n              ++this.pos;\r\n              return Token.MINUS_MINUS;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.MINUS_EQUALS;\r\n            }\r\n          }\r\n          return Token.MINUS;\r\n        }\r\n        case CharCode.DOT: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (isDecimalDigit(text.charCodeAt(this.pos))) {\r\n              --this.pos;\r\n              return Token.FLOATLITERAL; // expects a call to readFloat\r\n            }\r\n            if (\r\n              maxTokenLength > 2 && this.pos + 1 < this.end &&\r\n              text.charCodeAt(this.pos) == CharCode.DOT &&\r\n              text.charCodeAt(this.pos + 1) == CharCode.DOT\r\n            ) {\r\n              this.pos += 2;\r\n              return Token.DOT_DOT_DOT;\r\n            }\r\n          }\r\n          return Token.DOT;\r\n        }\r\n        case CharCode.SLASH: {\r\n          let commentStartPos = this.pos;\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.SLASH) { // single-line\r\n              let commentKind = CommentKind.LINE;\r\n              if (\r\n                this.pos + 1 < this.end &&\r\n                text.charCodeAt(this.pos + 1) == CharCode.SLASH\r\n              ) {\r\n                ++this.pos;\r\n                commentKind = CommentKind.TRIPLE;\r\n              }\r\n              while (++this.pos < this.end) {\r\n                if (text.charCodeAt(this.pos) == CharCode.LINEFEED) {\r\n                  ++this.pos;\r\n                  break;\r\n                }\r\n              }\r\n              if (this.onComment) {\r\n                this.onComment(\r\n                  commentKind,\r\n                  text.substring(commentStartPos, this.pos),\r\n                  this.range(commentStartPos, this.pos)\r\n                );\r\n              }\r\n              break;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.ASTERISK) { // multi-line\r\n              let closed = false;\r\n              while (++this.pos < this.end) {\r\n                c = text.charCodeAt(this.pos);\r\n                if (\r\n                  c == CharCode.ASTERISK &&\r\n                  this.pos + 1 < this.end &&\r\n                  text.charCodeAt(this.pos + 1) == CharCode.SLASH\r\n                ) {\r\n                  this.pos += 2;\r\n                  closed = true;\r\n                  break;\r\n                }\r\n              }\r\n              if (!closed) {\r\n                this.error(\r\n                  DiagnosticCode._0_expected,\r\n                  this.range(this.pos), \"*/\"\r\n                );\r\n              } else if (this.onComment) {\r\n                this.onComment(\r\n                  CommentKind.BLOCK,\r\n                  text.substring(commentStartPos, this.pos),\r\n                  this.range(commentStartPos, this.pos)\r\n                );\r\n              }\r\n              break;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.SLASH_EQUALS;\r\n            }\r\n          }\r\n          return Token.SLASH;\r\n        }\r\n        case CharCode._0:\r\n        case CharCode._1:\r\n        case CharCode._2:\r\n        case CharCode._3:\r\n        case CharCode._4:\r\n        case CharCode._5:\r\n        case CharCode._6:\r\n        case CharCode._7:\r\n        case CharCode._8:\r\n        case CharCode._9: {\r\n          return this.testInteger()\r\n            ? Token.INTEGERLITERAL // expects a call to readInteger\r\n            : Token.FLOATLITERAL;  // expects a call to readFloat\r\n        }\r\n        case CharCode.COLON: {\r\n          ++this.pos;\r\n          return Token.COLON;\r\n        }\r\n        case CharCode.SEMICOLON: {\r\n          ++this.pos;\r\n          return Token.SEMICOLON;\r\n        }\r\n        case CharCode.LESSTHAN: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.LESSTHAN) {\r\n              ++this.pos;\r\n              if (\r\n                maxTokenLength > 2 &&\r\n                this.pos < this.end &&\r\n                text.charCodeAt(this.pos) == CharCode.EQUALS\r\n              ) {\r\n                ++this.pos;\r\n                return Token.LESSTHAN_LESSTHAN_EQUALS;\r\n              }\r\n              return Token.LESSTHAN_LESSTHAN;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.LESSTHAN_EQUALS;\r\n            }\r\n          }\r\n          return Token.LESSTHAN;\r\n        }\r\n        case CharCode.EQUALS: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              if (\r\n                maxTokenLength > 2 &&\r\n                this.pos < this.end &&\r\n                text.charCodeAt(this.pos) == CharCode.EQUALS\r\n              ) {\r\n                ++this.pos;\r\n                return Token.EQUALS_EQUALS_EQUALS;\r\n              }\r\n              return Token.EQUALS_EQUALS;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.GREATERTHAN) {\r\n              ++this.pos;\r\n              return Token.EQUALS_GREATERTHAN;\r\n            }\r\n          }\r\n          return Token.EQUALS;\r\n        }\r\n        case CharCode.GREATERTHAN: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.GREATERTHAN) {\r\n              ++this.pos;\r\n              if (maxTokenLength > 2 && this.pos < this.end) {\r\n                if (text.charCodeAt(this.pos) == CharCode.GREATERTHAN) {\r\n                  ++this.pos;\r\n                  if (\r\n                    maxTokenLength > 3 && this.pos < this.end &&\r\n                    text.charCodeAt(this.pos) == CharCode.EQUALS\r\n                  ) {\r\n                    ++this.pos;\r\n                    return Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS;\r\n                  }\r\n                  return Token.GREATERTHAN_GREATERTHAN_GREATERTHAN;\r\n                }\r\n                if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n                  ++this.pos;\r\n                  return Token.GREATERTHAN_GREATERTHAN_EQUALS;\r\n                }\r\n              }\r\n              return Token.GREATERTHAN_GREATERTHAN;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.GREATERTHAN_EQUALS;\r\n            }\r\n          }\r\n          return Token.GREATERTHAN;\r\n        }\r\n        case CharCode.QUESTION: {\r\n          ++this.pos;\r\n          return Token.QUESTION;\r\n        }\r\n        case CharCode.OPENBRACKET: {\r\n          ++this.pos;\r\n          return Token.OPENBRACKET;\r\n        }\r\n        case CharCode.CLOSEBRACKET: {\r\n          ++this.pos;\r\n          return Token.CLOSEBRACKET;\r\n        }\r\n        case CharCode.CARET: {\r\n          ++this.pos;\r\n          if (\r\n            maxTokenLength > 1 && this.pos < this.end &&\r\n            text.charCodeAt(this.pos) == CharCode.EQUALS\r\n          ) {\r\n            ++this.pos;\r\n            return Token.CARET_EQUALS;\r\n          }\r\n          return Token.CARET;\r\n        }\r\n        case CharCode.OPENBRACE: {\r\n          ++this.pos;\r\n          return Token.OPENBRACE;\r\n        }\r\n        case CharCode.BAR: {\r\n          ++this.pos;\r\n          if (maxTokenLength > 1 && this.pos < this.end) {\r\n            if (text.charCodeAt(this.pos) == CharCode.BAR) {\r\n              ++this.pos;\r\n              return Token.BAR_BAR;\r\n            }\r\n            if (text.charCodeAt(this.pos) == CharCode.EQUALS) {\r\n              ++this.pos;\r\n              return Token.BAR_EQUALS;\r\n            }\r\n          }\r\n          return Token.BAR;\r\n        }\r\n        case CharCode.CLOSEBRACE: {\r\n          ++this.pos;\r\n          return Token.CLOSEBRACE;\r\n        }\r\n        case CharCode.TILDE: {\r\n          ++this.pos;\r\n          return Token.TILDE;\r\n        }\r\n        case CharCode.AT: {\r\n          ++this.pos;\r\n          return Token.AT;\r\n        }\r\n        default: {\r\n          if (isIdentifierStart(c)) {\r\n            if (isKeywordCharacter(c)) {\r\n              let posBefore = this.pos;\r\n              while (\r\n                ++this.pos < this.end &&\r\n                isIdentifierPart(c = text.charCodeAt(this.pos))\r\n              ) {\r\n                if (!isKeywordCharacter(c)) {\r\n                  this.pos = posBefore;\r\n                  return Token.IDENTIFIER;\r\n                }\r\n              }\r\n              let keywordText = text.substring(posBefore, this.pos);\r\n              let keywordToken = tokenFromKeyword(keywordText);\r\n              if (\r\n                keywordToken != Token.INVALID &&\r\n                identifierHandling !== IdentifierHandling.ALWAYS &&\r\n                !(\r\n                  identifierHandling === IdentifierHandling.PREFER &&\r\n                  tokenIsAlsoIdentifier(keywordToken)\r\n                )\r\n              ) {\r\n                return keywordToken;\r\n              }\r\n              this.pos = posBefore;\r\n            }\r\n            return Token.IDENTIFIER; // expects a call to readIdentifier\r\n          } else if (isWhiteSpace(c)) {\r\n            ++this.pos;\r\n            break;\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Invalid_character,\r\n            this.range(this.pos, this.pos + 1)\r\n          );\r\n          ++this.pos;\r\n          return Token.INVALID;\r\n        }\r\n      }\r\n    }\r\n    return Token.ENDOFFILE;\r\n  }\r\n\r\n  peek(\r\n    checkOnNewLine: bool = false,\r\n    identifierHandling: IdentifierHandling = IdentifierHandling.DEFAULT,\r\n    maxCompoundLength: i32 = i32.MAX_VALUE\r\n  ): Token {\r\n    var text = this.source.text;\r\n    if (this.nextToken < 0) {\r\n      let posBefore = this.pos;\r\n      let tokenBefore = this.token;\r\n      let tokenPosBefore = this.tokenPos;\r\n      this.nextToken = this.unsafeNext(identifierHandling, maxCompoundLength);\r\n      this.nextTokenPos = this.tokenPos;\r\n      if (checkOnNewLine) {\r\n        this.nextTokenOnNewLine = false;\r\n        for (let pos = posBefore, end = this.nextTokenPos; pos < end; ++pos) {\r\n          if (isLineBreak(text.charCodeAt(pos))) {\r\n            this.nextTokenOnNewLine = true;\r\n            break;\r\n          }\r\n        }\r\n      }\r\n      this.pos = posBefore;\r\n      this.token = tokenBefore;\r\n      this.tokenPos = tokenPosBefore;\r\n    }\r\n    return this.nextToken;\r\n  }\r\n\r\n  skipIdentifier(): bool {\r\n    return this.skip(Token.IDENTIFIER, IdentifierHandling.PREFER);\r\n  }\r\n\r\n  skipIdentifierName(): bool {\r\n    return this.skip(Token.IDENTIFIER, IdentifierHandling.ALWAYS);\r\n  }\r\n\r\n  skip(token: Token, identifierHandling: IdentifierHandling = IdentifierHandling.DEFAULT): bool {\r\n    var posBefore = this.pos;\r\n    var tokenBefore = this.token;\r\n    var tokenPosBefore = this.tokenPos;\r\n    var maxCompoundLength = i32.MAX_VALUE;\r\n    switch (token) {\r\n      case Token.GREATERTHAN: { // where parsing type arguments\r\n        maxCompoundLength = 1;\r\n        break;\r\n      }\r\n    }\r\n    this.token = this.unsafeNext(identifierHandling, maxCompoundLength);\r\n    if (this.token == token) {\r\n      this.nextToken = -1;\r\n      return true;\r\n    } else {\r\n      this.pos = posBefore;\r\n      this.token = tokenBefore;\r\n      this.tokenPos = tokenPosBefore;\r\n      return false;\r\n    }\r\n  }\r\n\r\n  mark(): State {\r\n    var state: State;\r\n    if (reusableState) {\r\n      state = reusableState;\r\n      reusableState = null;\r\n    } else {\r\n      state = new State();\r\n    }\r\n    state.pos = this.pos;\r\n    state.token = this.token;\r\n    state.tokenPos = this.tokenPos;\r\n    return state;\r\n  }\r\n\r\n  discard(state: State): void {\r\n    reusableState = state;\r\n  }\r\n\r\n  reset(state: State): void {\r\n    this.pos = state.pos;\r\n    this.token = state.token;\r\n    this.tokenPos = state.tokenPos;\r\n    this.nextToken = -1;\r\n  }\r\n\r\n  range(start: i32 = -1, end: i32 = -1): Range {\r\n    if (start < 0) {\r\n      start = this.tokenPos;\r\n      end = this.pos;\r\n    } else if (end < 0) {\r\n      end = start;\r\n    }\r\n    return new Range(this.source, start, end);\r\n  }\r\n\r\n  readIdentifier(): string {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    while (\r\n      ++this.pos < this.end &&\r\n      isIdentifierPart(text.charCodeAt(this.pos))\r\n    );\r\n    return text.substring(start, this.pos);\r\n  }\r\n\r\n  readString(): string {\r\n    var text = this.source.text;\r\n    var quote = text.charCodeAt(this.pos++);\r\n    var start = this.pos;\r\n    var result = \"\";\r\n    while (true) {\r\n      if (this.pos >= this.end) {\r\n        result += text.substring(start, this.pos);\r\n        this.error(\r\n          DiagnosticCode.Unterminated_string_literal,\r\n          this.range(start - 1, this.end)\r\n        );\r\n        break;\r\n      }\r\n      let c = text.charCodeAt(this.pos);\r\n      if (c == quote) {\r\n        result += text.substring(start, this.pos++);\r\n        break;\r\n      }\r\n      if (c == CharCode.BACKSLASH) {\r\n        result += text.substring(start, this.pos);\r\n        result += this.readEscapeSequence();\r\n        start = this.pos;\r\n        continue;\r\n      }\r\n      if (isLineBreak(c)) {\r\n        result += text.substring(start, this.pos);\r\n        this.error(\r\n          DiagnosticCode.Unterminated_string_literal,\r\n          this.range(start - 1, this.pos)\r\n        );\r\n        break;\r\n      }\r\n      ++this.pos;\r\n    }\r\n    return result;\r\n  }\r\n\r\n  readEscapeSequence(): string {\r\n    if (++this.pos >= this.end) {\r\n      this.error(\r\n        DiagnosticCode.Unexpected_end_of_text,\r\n        this.range(this.end)\r\n      );\r\n      return \"\";\r\n    }\r\n\r\n    var text = this.source.text;\r\n    var c = text.charCodeAt(this.pos++);\r\n    switch (c) {\r\n      case CharCode._0: return \"\\0\";\r\n      case CharCode.b: return \"\\b\";\r\n      case CharCode.t: return \"\\t\";\r\n      case CharCode.n: return \"\\n\";\r\n      case CharCode.v: return \"\\v\";\r\n      case CharCode.f: return \"\\f\";\r\n      case CharCode.r: return \"\\r\";\r\n      case CharCode.SINGLEQUOTE: return \"'\";\r\n      case CharCode.DOUBLEQUOTE: return \"\\\"\";\r\n      case CharCode.u: {\r\n        if (\r\n          this.pos < this.end &&\r\n          text.charCodeAt(this.pos) == CharCode.OPENBRACE\r\n        ) {\r\n          ++this.pos;\r\n          return this.readExtendedUnicodeEscape(); // \\u{DDDDDDDD}\r\n        }\r\n        return this.readUnicodeEscape(); // \\uDDDD\r\n      }\r\n      case CharCode.CARRIAGERETURN: {\r\n        if (\r\n          this.pos < this.end &&\r\n          text.charCodeAt(this.pos) == CharCode.LINEFEED\r\n        ) {\r\n          ++this.pos;\r\n        }\r\n        // fall through\r\n      }\r\n      case CharCode.LINEFEED:\r\n      case CharCode.LINESEPARATOR:\r\n      case CharCode.PARAGRAPHSEPARATOR: return \"\";\r\n      default: return String.fromCharCode(c);\r\n    }\r\n  }\r\n\r\n  readRegexpPattern(): string {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var escaped = false;\r\n    while (true) {\r\n      if (this.pos >= this.end) {\r\n        this.error(\r\n          DiagnosticCode.Unterminated_regular_expression_literal,\r\n          this.range(start, this.end)\r\n        );\r\n        break;\r\n      }\r\n      if (text.charCodeAt(this.pos) == CharCode.BACKSLASH) {\r\n        ++this.pos;\r\n        escaped = true;\r\n        continue;\r\n      }\r\n      let c = text.charCodeAt(this.pos);\r\n      if (c == CharCode.SLASH && !escaped) break;\r\n      if (isLineBreak(c)) {\r\n        this.error(\r\n          DiagnosticCode.Unterminated_regular_expression_literal,\r\n          this.range(start, this.pos)\r\n        );\r\n        break;\r\n      }\r\n      ++this.pos;\r\n      escaped = false;\r\n    }\r\n    return text.substring(start, this.pos);\r\n  }\r\n\r\n  readRegexpFlags(): string {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var flags = 0;\r\n    while (this.pos < this.end) {\r\n      let c: i32 = text.charCodeAt(this.pos);\r\n      if (!isIdentifierPart(c)) break;\r\n      ++this.pos;\r\n\r\n      // make sure each supported flag is unique\r\n      switch (c) {\r\n        case CharCode.g: {\r\n          flags |= flags & 1 ? -1 : 1;\r\n          break;\r\n        }\r\n        case CharCode.i: {\r\n          flags |= flags & 2 ? -1 : 2;\r\n          break;\r\n        }\r\n        case CharCode.m: {\r\n          flags |= flags & 4 ? -1 : 4;\r\n          break;\r\n        }\r\n        default: {\r\n          flags = -1;\r\n          break;\r\n        }\r\n      }\r\n    }\r\n    if (flags == -1) {\r\n      this.error(\r\n        DiagnosticCode.Invalid_regular_expression_flags,\r\n        this.range(start, this.pos)\r\n      );\r\n    }\r\n    return text.substring(start, this.pos);\r\n  }\r\n\r\n  testInteger(): bool {\r\n    var text = this.source.text;\r\n    if (text.charCodeAt(this.pos) == CharCode._0 && this.pos + 1 < this.end) {\r\n      switch (text.charCodeAt(this.pos + 2)) {\r\n        case CharCode.X:\r\n        case CharCode.x:\r\n        case CharCode.B:\r\n        case CharCode.b:\r\n        case CharCode.O:\r\n        case CharCode.o: return true;\r\n      }\r\n    }\r\n    var pos = this.pos;\r\n    while (pos < this.end) {\r\n      let c = text.charCodeAt(pos);\r\n      if (c == CharCode.DOT || c == CharCode.E || c == CharCode.e) {\r\n        return false;\r\n      }\r\n      if ((c < CharCode._0 || c > CharCode._9) && c != CharCode._) break;\r\n      // does not validate separator placement (this is done in readXYInteger)\r\n      pos++;\r\n    }\r\n    return true;\r\n  }\r\n\r\n  readInteger(): I64 {\r\n    var text = this.source.text;\r\n    if (text.charCodeAt(this.pos) == CharCode._0 && this.pos + 2 < this.end) {\r\n      switch (text.charCodeAt(this.pos + 1)) {\r\n        case CharCode.X:\r\n        case CharCode.x: {\r\n          this.pos += 2;\r\n          return this.readHexInteger();\r\n        }\r\n        case CharCode.B:\r\n        case CharCode.b: {\r\n          this.pos += 2;\r\n          return this.readBinaryInteger();\r\n        }\r\n        case CharCode.O:\r\n        case CharCode.o: {\r\n          this.pos += 2;\r\n          return this.readOctalInteger();\r\n        }\r\n      }\r\n      if (isOctalDigit(text.charCodeAt(this.pos + 1))) {\r\n        let start = this.pos;\r\n        ++this.pos;\r\n        let value = this.readOctalInteger();\r\n        this.error(\r\n          DiagnosticCode.Octal_literals_are_not_allowed_in_strict_mode,\r\n          this.range(start, this.pos)\r\n        );\r\n        return value;\r\n      }\r\n    }\r\n    return this.readDecimalInteger();\r\n  }\r\n\r\n  readHexInteger(): I64 {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var value = i64_new(0, 0);\r\n    var i64_16 = i64_new(16, 0);\r\n    var sepEnd = start;\r\n    while (this.pos < this.end) {\r\n      let pos = this.pos;\r\n      let c = text.charCodeAt(pos);\r\n      if (c >= CharCode._0 && c <= CharCode._9) {\r\n        // value = value * 16 + c - CharCode._0;\r\n        value = i64_add(\r\n          i64_mul(value, i64_16),\r\n          i64_new(c - CharCode._0, 0)\r\n        );\r\n       } else if (c >= CharCode.A && c <= CharCode.F) {\r\n        // value = value * 16 + 10 + c - CharCode.A;\r\n        value = i64_add(\r\n          i64_mul(value, i64_16),\r\n          i64_new(10 + c - CharCode.A, 0)\r\n        );\r\n      } else if (c >= CharCode.a && c <= CharCode.f) {\r\n        // value = value * 16 + 10 + c - CharCode.a;\r\n        value = i64_add(\r\n          i64_mul(value, i64_16),\r\n          i64_new(10 + c - CharCode.a, 0)\r\n        );\r\n      } else if (c == CharCode._) {\r\n        if (sepEnd == pos) {\r\n          this.error(\r\n            sepEnd == start\r\n              ? DiagnosticCode.Numeric_separators_are_not_allowed_here\r\n              : DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,\r\n            this.range(pos)\r\n          );\r\n        }\r\n        sepEnd = pos + 1;\r\n      } else {\r\n        break;\r\n      }\r\n      this.pos = pos + 1;\r\n    }\r\n    if (this.pos == start) {\r\n      this.error(\r\n        DiagnosticCode.Hexadecimal_digit_expected,\r\n        this.range(start)\r\n      );\r\n    } else if (sepEnd == this.pos) {\r\n      this.error(\r\n        DiagnosticCode.Numeric_separators_are_not_allowed_here,\r\n        this.range(sepEnd - 1)\r\n      );\r\n    }\r\n    return value;\r\n  }\r\n\r\n  readDecimalInteger(): I64 {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var value = i64_new(0, 0);\r\n    var i64_10 = i64_new(10, 0);\r\n    var sepEnd = start;\r\n    while (this.pos < this.end) {\r\n      let pos = this.pos;\r\n      let c = text.charCodeAt(pos);\r\n      if (c >= CharCode._0 && c <= CharCode._9) {\r\n        // value = value * 10 + c - CharCode._0;\r\n        value = i64_add(\r\n          i64_mul(value, i64_10),\r\n          i64_new(c - CharCode._0, 0)\r\n        );\r\n      } else if (c == CharCode._) {\r\n        if (sepEnd == pos) {\r\n          this.error(\r\n            sepEnd == start\r\n              ? DiagnosticCode.Numeric_separators_are_not_allowed_here\r\n              : DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,\r\n            this.range(pos)\r\n          );\r\n        }\r\n        sepEnd = pos + 1;\r\n      } else {\r\n        break;\r\n      }\r\n      this.pos = pos + 1;\r\n    }\r\n    if (this.pos == start) {\r\n      this.error(\r\n        DiagnosticCode.Digit_expected,\r\n        this.range(start)\r\n      );\r\n    } else if (sepEnd == this.pos) {\r\n      this.error(\r\n        DiagnosticCode.Numeric_separators_are_not_allowed_here,\r\n        this.range(sepEnd - 1)\r\n      );\r\n    }\r\n    return value;\r\n  }\r\n\r\n  readOctalInteger(): I64 {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var value = i64_new(0, 0);\r\n    var i64_8 = i64_new(8, 0);\r\n    var sepEnd = start;\r\n    while (this.pos < this.end) {\r\n      let pos = this.pos;\r\n      let c = text.charCodeAt(pos);\r\n      if (c >= CharCode._0 && c <= CharCode._7) {\r\n        // value = value * 8 + c - CharCode._0;\r\n        value = i64_add(\r\n          i64_mul(value, i64_8),\r\n          i64_new(c - CharCode._0, 0)\r\n        );\r\n      } else if (c == CharCode._) {\r\n        if (sepEnd == pos) {\r\n          this.error(\r\n            sepEnd == start\r\n              ? DiagnosticCode.Numeric_separators_are_not_allowed_here\r\n              : DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,\r\n            this.range(pos)\r\n          );\r\n        }\r\n        sepEnd = pos + 1;\r\n      } else {\r\n        break;\r\n      }\r\n      ++this.pos;\r\n    }\r\n    if (this.pos == start) {\r\n      this.error(\r\n        DiagnosticCode.Octal_digit_expected,\r\n        this.range(start)\r\n      );\r\n    } else if (sepEnd == this.pos) {\r\n      this.error(\r\n        DiagnosticCode.Numeric_separators_are_not_allowed_here,\r\n        this.range(sepEnd - 1)\r\n      );\r\n    }\r\n    return value;\r\n  }\r\n\r\n  readBinaryInteger(): I64 {\r\n    var text = this.source.text;\r\n    var start = this.pos;\r\n    var value = i64_new(0, 0);\r\n    var i64_2 = i64_new(2, 0);\r\n    var i64_1 = i64_new(1, 0);\r\n    var sepEnd = start;\r\n    while (this.pos < this.end) {\r\n      let pos = this.pos;\r\n      let c = text.charCodeAt(pos);\r\n      if (c == CharCode._0) {\r\n        // value = value * 2;\r\n        value = i64_mul(\r\n          value,\r\n          i64_2\r\n        );\r\n      } else if (c == CharCode._1) {\r\n        // value = value * 2 + 1;\r\n        value = i64_add(\r\n          i64_mul(value, i64_2),\r\n          i64_1\r\n        );\r\n      } else if (c == CharCode._) {\r\n        if (sepEnd == pos) {\r\n          this.error(\r\n            sepEnd == start\r\n              ? DiagnosticCode.Numeric_separators_are_not_allowed_here\r\n              : DiagnosticCode.Multiple_consecutive_numeric_separators_are_not_permitted,\r\n            this.range(pos)\r\n          );\r\n        }\r\n        sepEnd = pos + 1;\r\n      } else {\r\n        break;\r\n      }\r\n      this.pos = pos + 1;\r\n    }\r\n    if (this.pos == start) {\r\n      this.error(\r\n        DiagnosticCode.Binary_digit_expected,\r\n        this.range(start)\r\n      );\r\n    } else if (sepEnd == this.pos) {\r\n      this.error(\r\n        DiagnosticCode.Numeric_separators_are_not_allowed_here,\r\n        this.range(sepEnd - 1)\r\n      );\r\n    }\r\n    return value;\r\n  }\r\n\r\n  readFloat(): f64 {\r\n    // var text = this.source.text;\r\n    // if (text.charCodeAt(this.pos) == CharCode._0 && this.pos + 2 < this.end) {\r\n    //   switch (text.charCodeAt(this.pos + 1)) {\r\n    //     case CharCode.X:\r\n    //     case CharCode.x: {\r\n    //       this.pos += 2;\r\n    //       return this.readHexFloat();\r\n    //     }\r\n    //   }\r\n    // }\r\n    return this.readDecimalFloat();\r\n  }\r\n\r\n  readDecimalFloat(): f64 {\r\n    // TODO: numeric separators (parseFloat can't handle these)\r\n    var start = this.pos;\r\n    var text = this.source.text;\r\n    while (this.pos < this.end && isDecimalDigit(text.charCodeAt(this.pos))) {\r\n      ++this.pos;\r\n    }\r\n    if (this.pos < this.end && text.charCodeAt(this.pos) == CharCode.DOT) {\r\n      ++this.pos;\r\n      while (this.pos < this.end && isDecimalDigit(text.charCodeAt(this.pos))) {\r\n        ++this.pos;\r\n      }\r\n    }\r\n    if (this.pos < this.end) {\r\n      let c = text.charCodeAt(this.pos);\r\n      if (c == CharCode.E || c == CharCode.e) {\r\n        if (\r\n          ++this.pos < this.end && (\r\n            text.charCodeAt(this.pos) == CharCode.MINUS ||\r\n            text.charCodeAt(this.pos) == CharCode.PLUS\r\n          ) &&\r\n          isDecimalDigit(text.charCodeAt(this.pos + 1))\r\n        ) {\r\n          ++this.pos;\r\n        }\r\n        while (this.pos < this.end && isDecimalDigit(text.charCodeAt(this.pos))) {\r\n          ++this.pos;\r\n        }\r\n      }\r\n    }\r\n    return parseFloat(text.substring(start, this.pos));\r\n  }\r\n\r\n  readHexFloat(): f64 {\r\n    throw new Error(\"not implemented\"); // TBD\r\n  }\r\n\r\n  readUnicodeEscape(): string {\r\n    var remain = 4;\r\n    var value = 0;\r\n    var text = this.source.text;\r\n    while (this.pos < this.end) {\r\n      let c = text.charCodeAt(this.pos++);\r\n      if (c >= CharCode._0 && c <= CharCode._9) {\r\n        value = value * 16 + c - CharCode._0;\r\n      } else if (c >= CharCode.A && c <= CharCode.F) {\r\n        value = value * 16 + 10 + c - CharCode.A;\r\n      } else if (c >= CharCode.a && c <= CharCode.f) {\r\n        value = value * 16 + 10 + c - CharCode.a;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Hexadecimal_digit_expected,\r\n          this.range(this.pos - 1, this.pos)\r\n        );\r\n        return \"\";\r\n      }\r\n      if (--remain == 0) break;\r\n    }\r\n    if (remain) {\r\n      this.error(\r\n        DiagnosticCode.Unexpected_end_of_text,\r\n        this.range(this.pos)\r\n      );\r\n      return \"\";\r\n    }\r\n    return String.fromCharCode(value);\r\n  }\r\n\r\n  private readExtendedUnicodeEscape(): string {\r\n    var start = this.pos;\r\n    var value = this.readHexInteger();\r\n    var value32 = i64_low(value);\r\n    var invalid = false;\r\n\r\n    assert(!i64_high(value));\r\n    if (value32 > 0x10FFFF) {\r\n      this.error(\r\n        DiagnosticCode.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive,\r\n        this.range(start, this.pos)\r\n      );\r\n      invalid = true;\r\n    }\r\n\r\n    var text = this.source.text;\r\n    if (this.pos >= this.end) {\r\n      this.error(\r\n        DiagnosticCode.Unexpected_end_of_text,\r\n        this.range(start, this.end)\r\n      );\r\n      invalid = true;\r\n    } else if (text.charCodeAt(this.pos) == CharCode.CLOSEBRACE) {\r\n      ++this.pos;\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Unterminated_Unicode_escape_sequence,\r\n        this.range(start, this.pos)\r\n      );\r\n      invalid = true;\r\n    }\r\n\r\n    if (invalid) return \"\";\r\n    return value32 < 65536\r\n      ? String.fromCharCode(value32)\r\n      : String.fromCharCode(\r\n        (((value32 - 65536) / 1024 | 0) + 0xD800) as i32,\r\n        ( (value32 - 65536) % 1024      + 0xDC00) as i32\r\n      );\r\n  }\r\n\r\n  finish(): void {\r\n  }\r\n}\r\n\r\n/** Tokenizer state as returned by {@link Tokenizer#mark} and consumed by {@link Tokenizer#reset}. */\r\nexport class State {\r\n  /** Current position. */\r\n  pos: i32;\r\n  /** Current token. */\r\n  token: Token;\r\n  /** Current token's position. */\r\n  tokenPos: i32;\r\n}\r\n\r\n// Reusable state object to reduce allocations\r\nvar reusableState: State | null = null;\r\n","/**\r\n * The AssemblyScript compiler.\r\n * @module compiler\r\n *//***/\r\n\r\nimport {\r\n  compileCall as compileBuiltinCall,\r\n  compileAllocate,\r\n  compileAbort,\r\n  compileIterateRoots,\r\n  ensureGCHook\r\n} from \"./builtins\";\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  DiagnosticEmitter\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Module,\r\n  MemorySegment,\r\n  ExpressionRef,\r\n  UnaryOp,\r\n  BinaryOp,\r\n  NativeType,\r\n  FunctionRef,\r\n  ExpressionId,\r\n  FunctionTypeRef,\r\n  GlobalRef,\r\n  getExpressionId,\r\n  getExpressionType,\r\n  getConstValueI32,\r\n  getConstValueI64Low,\r\n  getConstValueI64High,\r\n  getConstValueF32,\r\n  getConstValueF64,\r\n  getGetLocalIndex,\r\n  getBlockChildCount,\r\n  getBlockChild,\r\n  getBlockName,\r\n  needsExplicitUnreachable\r\n} from \"./module\";\r\n\r\nimport {\r\n  CommonFlags,\r\n  PATH_DELIMITER,\r\n  INNER_DELIMITER,\r\n  INSTANCE_DELIMITER,\r\n  STATIC_DELIMITER,\r\n  GETTER_PREFIX,\r\n  SETTER_PREFIX\r\n} from \"./common\";\r\n\r\nimport {\r\n  Program,\r\n  ClassPrototype,\r\n  Class,\r\n  Element,\r\n  ElementKind,\r\n  Enum,\r\n  Field,\r\n  FunctionPrototype,\r\n  Function,\r\n  FunctionTarget,\r\n  Global,\r\n  Local,\r\n  Namespace,\r\n  EnumValue,\r\n  Property,\r\n  VariableLikeElement,\r\n  FlowFlags,\r\n  ConstantValueKind,\r\n  Flow,\r\n  OperatorKind,\r\n  DecoratorFlags\r\n} from \"./program\";\r\n\r\nimport {\r\n  Resolver, ReportMode\r\n} from \"./resolver\";\r\n\r\nimport {\r\n  Token,\r\n  operatorTokenToString\r\n} from \"./tokenizer\";\r\n\r\nimport {\r\n  Node,\r\n  NodeKind,\r\n  TypeNode,\r\n  Source,\r\n  Range,\r\n  DecoratorKind,\r\n\r\n  Statement,\r\n  BlockStatement,\r\n  BreakStatement,\r\n  ClassDeclaration,\r\n  ContinueStatement,\r\n  DeclarationStatement,\r\n  DoStatement,\r\n  EmptyStatement,\r\n  EnumDeclaration,\r\n  ExportStatement,\r\n  ExpressionStatement,\r\n  FunctionDeclaration,\r\n  ForStatement,\r\n  IfStatement,\r\n  ImportStatement,\r\n  InstanceOfExpression,\r\n  InterfaceDeclaration,\r\n  NamespaceDeclaration,\r\n  ReturnStatement,\r\n  SwitchStatement,\r\n  ThrowStatement,\r\n  TryStatement,\r\n  VariableDeclaration,\r\n  VariableStatement,\r\n  VoidStatement,\r\n  WhileStatement,\r\n\r\n  Expression,\r\n  AssertionExpression,\r\n  BinaryExpression,\r\n  CallExpression,\r\n  CommaExpression,\r\n  ElementAccessExpression,\r\n  FloatLiteralExpression,\r\n  FunctionExpression,\r\n  IdentifierExpression,\r\n  IntegerLiteralExpression,\r\n  LiteralExpression,\r\n  LiteralKind,\r\n  NewExpression,\r\n  ObjectLiteralExpression,\r\n  ParenthesizedExpression,\r\n  PropertyAccessExpression,\r\n  TernaryExpression,\r\n  ArrayLiteralExpression,\r\n  StringLiteralExpression,\r\n  UnaryPostfixExpression,\r\n  UnaryPrefixExpression,\r\n  FieldDeclaration,\r\n\r\n  nodeIsConstantValue,\r\n  isLastStatement,\r\n  findDecorator\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Type,\r\n  TypeKind,\r\n  TypeFlags,\r\n  Signature,\r\n\r\n  typesToNativeTypes\r\n} from \"./types\";\r\n\r\nimport {\r\n  writeI8,\r\n  writeI16,\r\n  writeI32,\r\n  writeI64,\r\n  writeF32,\r\n  writeF64\r\n} from \"./util\";\r\n\r\n/** Compilation target. */\r\nexport enum Target {\r\n  /** WebAssembly with 32-bit pointers. */\r\n  WASM32,\r\n  /** WebAssembly with 64-bit pointers. Experimental and not supported by any runtime yet. */\r\n  WASM64\r\n}\r\n\r\n/** Compiler options. */\r\nexport class Options {\r\n\r\n  /** WebAssembly target. Defaults to {@link Target.WASM32}. */\r\n  target: Target = Target.WASM32;\r\n  /** If true, compiles everything instead of just reachable code. */\r\n  noTreeShaking: bool = false;\r\n  /** If true, replaces assertions with nops. */\r\n  noAssert: bool = false;\r\n  /** If true, imports the memory provided by the embedder. */\r\n  importMemory: bool = false;\r\n  /** If true, imports the function table provided by the embedder. */\r\n  importTable: bool = false;\r\n  /** If true, generates information necessary for source maps. */\r\n  sourceMap: bool = false;\r\n  /** Static memory start offset. */\r\n  memoryBase: i32 = 0;\r\n  /** Global aliases. */\r\n  globalAliases: Map<string,string> | null = null;\r\n  /** Additional features to activate. */\r\n  features: Feature = Feature.NONE;\r\n\r\n  /** Hinted optimize level. Not applied by the compiler itself. */\r\n  optimizeLevelHint: i32 = 0;\r\n  /** Hinted shrink level. Not applied by the compiler itself. */\r\n  shrinkLevelHint: i32 = 0;\r\n\r\n  /** Tests if the target is WASM64 or, otherwise, WASM32. */\r\n  get isWasm64(): bool {\r\n    return this.target == Target.WASM64;\r\n  }\r\n\r\n  /** Gets the unsigned size type matching the target. */\r\n  get usizeType(): Type {\r\n    return this.target == Target.WASM64 ? Type.usize64 : Type.usize32;\r\n  }\r\n\r\n  /** Gets the signed size type matching the target. */\r\n  get isizeType(): Type {\r\n    return this.target == Target.WASM64 ? Type.isize64 : Type.isize32;\r\n  }\r\n\r\n  /** Gets the native size type matching the target. */\r\n  get nativeSizeType(): NativeType {\r\n    return this.target == Target.WASM64 ? NativeType.I64 : NativeType.I32;\r\n  }\r\n\r\n  /** Tests if a specific feature is activated. */\r\n  hasFeature(feature: Feature): bool {\r\n    return (this.features & feature) != 0;\r\n  }\r\n}\r\n\r\n/** Indicates specific features to activate. */\r\nexport const enum Feature {\r\n  /** No additional features. */\r\n  NONE = 0,\r\n  /** Sign extension operations. */\r\n  SIGN_EXTENSION = 1 << 0, // see: https://github.com/WebAssembly/sign-extension-ops\r\n  /** Mutable global imports and exports. */\r\n  MUTABLE_GLOBAL = 1 << 1  // see: https://github.com/WebAssembly/mutable-global\r\n}\r\n\r\n/** Indicates the desired kind of a conversion. */\r\nexport const enum ConversionKind {\r\n  /** No conversion. */\r\n  NONE,\r\n  /** Implicit conversion. */\r\n  IMPLICIT,\r\n  /** Explicit conversion. */\r\n  EXPLICIT\r\n}\r\n\r\n/** Indicates the desired wrap mode of a conversion. */\r\nexport const enum WrapMode {\r\n  /** No wrapping. */\r\n  NONE,\r\n  /** Wrap small integer values. */\r\n  WRAP\r\n}\r\n\r\n/** Compiler interface. */\r\nexport class Compiler extends DiagnosticEmitter {\r\n\r\n  /** Program reference. */\r\n  program: Program;\r\n  /** Resolver reference. */\r\n  resolver: Resolver;\r\n  /** Provided options. */\r\n  options: Options;\r\n  /** Module instance being compiled. */\r\n  module: Module;\r\n  /** Current function in compilation. */\r\n  currentFunction: Function;\r\n  /** Current outer function in compilation, if compiling a function expression. */\r\n  currentOuterFunction: Function | null = null;\r\n  /** Current inline functions stack. */\r\n  currentInlineFunctions: Function[] = [];\r\n  /** Current enum in compilation. */\r\n  currentEnum: Enum | null = null;\r\n  /** Current type in compilation. */\r\n  currentType: Type = Type.void;\r\n  /** Start function being compiled. */\r\n  startFunctionInstance: Function;\r\n  /** Start function statements. */\r\n  startFunctionBody: ExpressionRef[];\r\n  /** Counting memory offset. */\r\n  memoryOffset: I64;\r\n  /** Memory segments being compiled. */\r\n  memorySegments: MemorySegment[] = [];\r\n  /** Map of already compiled static string segments. */\r\n  stringSegments: Map<string,MemorySegment> = new Map();\r\n  /** Function table being compiled. */\r\n  functionTable: FunctionRef[] = [];\r\n  /** Argument count helper global. */\r\n  argcVar: GlobalRef = 0;\r\n  /** Argument count helper setter. */\r\n  argcSet: FunctionRef = 0;\r\n  /** Indicates whether the iterateRoots function must be generated. */\r\n  needsIterateRoots: bool = false;\r\n\r\n  /** Compiles a {@link Program} to a {@link Module} using the specified options. */\r\n  static compile(program: Program, options: Options | null = null): Module {\r\n    return new Compiler(program, options).compile();\r\n  }\r\n\r\n  /** Constructs a new compiler for a {@link Program} using the specified options. */\r\n  constructor(program: Program, options: Options | null = null) {\r\n    super(program.diagnostics);\r\n    this.program = program;\r\n    this.resolver = program.resolver;\r\n    if (!options) options = new Options();\r\n    this.options = options;\r\n    this.memoryOffset = i64_new(\r\n      // leave space for `null`. also functions as a sentinel for erroneous stores at offset 0.\r\n      // note that Binaryen's asm.js output utilizes the first 8 bytes for reinterpretations (#1547)\r\n      max(options.memoryBase, 8)\r\n    );\r\n    this.module = Module.create();\r\n  }\r\n\r\n  /** Performs compilation of the underlying {@link Program} to a {@link Module}. */\r\n  compile(): Module {\r\n    var options = this.options;\r\n    var module = this.module;\r\n    var program = this.program;\r\n\r\n    // initialize lookup maps, built-ins, imports, exports, etc.\r\n    program.initialize(options);\r\n\r\n    // set up the start function\r\n    var startFunctionInstance = new Function(program.startFunction, \"start\", new Signature([], Type.void));\r\n    this.startFunctionInstance = startFunctionInstance;\r\n    var startFunctionBody = new Array<ExpressionRef>();\r\n    this.startFunctionBody = startFunctionBody;\r\n    this.currentFunction = startFunctionInstance;\r\n\r\n    // compile entry file(s) while traversing reachable elements\r\n    var sources = program.sources;\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      if (sources[i].isEntry) this.compileSource(sources[i]);\r\n    }\r\n\r\n    // compile the start function if not empty or called by main\r\n    if (startFunctionBody.length || program.mainFunction !== null) {\r\n      let signature = startFunctionInstance.signature;\r\n      let funcRef = module.addFunction(\r\n        startFunctionInstance.internalName,\r\n        this.ensureFunctionType(\r\n          signature.parameterTypes,\r\n          signature.returnType,\r\n          signature.thisType\r\n        ),\r\n        typesToNativeTypes(startFunctionInstance.additionalLocals),\r\n        module.createBlock(null, startFunctionBody)\r\n      );\r\n      startFunctionInstance.finalize(module, funcRef);\r\n      if (!program.mainFunction) module.setStart(funcRef);\r\n    }\r\n\r\n    // set up static memory segments and the heap base pointer\r\n    var memoryOffset = this.memoryOffset;\r\n    memoryOffset = i64_align(memoryOffset, options.usizeType.byteSize);\r\n    this.memoryOffset = memoryOffset;\r\n    if (options.isWasm64) {\r\n      module.addGlobal(\r\n        \"HEAP_BASE\",\r\n        NativeType.I64,\r\n        false,\r\n        module.createI64(i64_low(memoryOffset), i64_high(memoryOffset))\r\n      );\r\n    } else {\r\n      module.addGlobal(\r\n        \"HEAP_BASE\",\r\n        NativeType.I32,\r\n        false,\r\n        module.createI32(i64_low(memoryOffset))\r\n      );\r\n    }\r\n\r\n    // determine initial page size\r\n    var numPages = this.memorySegments.length\r\n      ? i64_low(i64_shr_u(i64_align(memoryOffset, 0x10000), i64_new(16, 0)))\r\n      : 0;\r\n    module.setMemory(\r\n      numPages,\r\n      this.options.isWasm64\r\n        ? Module.MAX_MEMORY_WASM64\r\n        : Module.MAX_MEMORY_WASM32,\r\n      this.memorySegments,\r\n      options.target,\r\n      \"memory\"\r\n    );\r\n\r\n    // import memory if requested (default memory is named '0' by Binaryen)\r\n    if (options.importMemory) module.addMemoryImport(\"0\", \"env\", \"memory\");\r\n\r\n    // set up function table\r\n    var functionTable = this.functionTable;\r\n    var functionTableSize = functionTable.length;\r\n    var functionTableExported = false;\r\n    if (functionTableSize) {\r\n      module.setFunctionTable(functionTable);\r\n      module.addTableExport(\"0\", \"table\");\r\n      functionTableExported = true;\r\n    }\r\n\r\n    // import table if requested (default table is named '0' by Binaryen)\r\n    if (options.importTable) {\r\n      module.addTableImport(\"0\", \"env\", \"table\");\r\n      if (!functionTableExported) module.addTableExport(\"0\", \"table\");\r\n    }\r\n\r\n    // set up module exports\r\n    for (let [name, moduleExport] of program.moduleLevelExports) {\r\n      this.makeModuleExport(name, moduleExport.element);\r\n    }\r\n\r\n    // set up gc\r\n    if (this.needsIterateRoots) compileIterateRoots(this);\r\n\r\n    return module;\r\n  }\r\n\r\n  /** Applies the respective module export(s) for the specified element. */\r\n  private makeModuleExport(name: string, element: Element, prefix: string = \"\"): void {\r\n\r\n    // traverse members\r\n    var members = element.members;\r\n    if (members) {\r\n      let subPrefix = prefix + name + (element.kind == ElementKind.CLASS\r\n        ? INSTANCE_DELIMITER\r\n        : STATIC_DELIMITER\r\n      );\r\n      if (element.kind == ElementKind.NAMESPACE) {\r\n        for (let member of members.values()) {\r\n          if (!member.is(CommonFlags.EXPORT)) continue;\r\n          this.makeModuleExport(member.simpleName, member, subPrefix);\r\n        }\r\n      } else {\r\n        for (let member of members.values()) {\r\n          if (member.is(CommonFlags.PRIVATE)) continue;\r\n          this.makeModuleExport(member.simpleName, member, subPrefix);\r\n        }\r\n      }\r\n    }\r\n\r\n    switch (element.kind) {\r\n\r\n      // export global\r\n      case ElementKind.GLOBAL: {\r\n        let isConst = element.is(CommonFlags.CONST) || element.is(CommonFlags.STATIC | CommonFlags.READONLY);\r\n        if (!isConst && !this.options.hasFeature(Feature.MUTABLE_GLOBAL)) {\r\n          let declaration = (<Global>element).declaration;\r\n          if (declaration) {\r\n            this.error(\r\n              DiagnosticCode.Cannot_export_a_mutable_global,\r\n              declaration.name.range\r\n            );\r\n          }\r\n        } else {\r\n          this.module.addGlobalExport(element.internalName, prefix + name);\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.ENUMVALUE: {\r\n        if (!assert(element.parent).is(CommonFlags.CONST) && !this.options.hasFeature(Feature.MUTABLE_GLOBAL)) {\r\n          let declaration = (<EnumValue>element).declaration;\r\n          if (declaration) {\r\n            this.error(\r\n              DiagnosticCode.Cannot_export_a_mutable_global,\r\n              declaration.name.range\r\n            );\r\n          }\r\n        } else {\r\n          this.module.addGlobalExport(element.internalName, prefix + name);\r\n        }\r\n        break;\r\n      }\r\n\r\n      // export function\r\n      case ElementKind.FUNCTION: {\r\n        let instance = <Function>element;\r\n        let signature = instance.signature;\r\n        if (signature.requiredParameters < signature.parameterTypes.length) {\r\n          // utilize trampoline to fill in omitted arguments\r\n          instance = this.ensureTrampoline(instance);\r\n          this.ensureArgcSet();\r\n        }\r\n        if (instance.is(CommonFlags.COMPILED)) this.module.addFunctionExport(instance.internalName, prefix + name);\r\n        break;\r\n      }\r\n\r\n      // export getter and setter\r\n      case ElementKind.PROPERTY: {\r\n        let getter = assert((<Property>element).getterPrototype);\r\n        this.makeModuleExport(GETTER_PREFIX + name, getter, prefix);\r\n        let setter = (<Property>element).setterPrototype;\r\n        if (setter) this.makeModuleExport(SETTER_PREFIX + name, setter, prefix);\r\n        break;\r\n      }\r\n\r\n      // export a getter and a setter\r\n      case ElementKind.FIELD: {\r\n        let module = this.module;\r\n        let type = (<Field>element).type;\r\n        let nativeType = type.toNativeType();\r\n        let offset = (<Field>element).memoryOffset;\r\n        let usizeType = this.options.usizeType;\r\n        let nativeSizeType = this.options.nativeSizeType;\r\n\r\n        // make a getter\r\n        let getterName = prefix + GETTER_PREFIX + name;\r\n        module.addFunction(\r\n          getterName,\r\n          this.ensureFunctionType(null, type, usizeType),\r\n          null,\r\n          module.createLoad(\r\n            type.byteSize,\r\n            type.is(TypeFlags.SIGNED),\r\n            module.createGetLocal(0, nativeSizeType),\r\n            nativeType,\r\n            offset\r\n          )\r\n        );\r\n        module.addFunctionExport(getterName, getterName);\r\n\r\n        // make a setter\r\n        if (!element.is(CommonFlags.READONLY)) {\r\n          let setterName = prefix + SETTER_PREFIX + name;\r\n          module.addFunction(\r\n            setterName,\r\n            this.ensureFunctionType([ type ], Type.void, usizeType),\r\n            null,\r\n            module.createStore(\r\n              type.byteSize,\r\n              module.createGetLocal(0, nativeSizeType),\r\n              module.createGetLocal(1, nativeType),\r\n              nativeType,\r\n              offset\r\n            )\r\n          );\r\n          module.addFunctionExport(setterName, setterName);\r\n        }\r\n        break;\r\n      }\r\n\r\n      // skip prototype and export instances\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        for (let instance of (<FunctionPrototype>element).instances.values()) {\r\n          let instanceName = name;\r\n          if (instance.is(CommonFlags.GENERIC)) {\r\n            let fullName = instance.internalName;\r\n            instanceName += fullName.substring(fullName.lastIndexOf(\"<\"));\r\n          }\r\n          this.makeModuleExport(instanceName, instance, prefix);\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.CLASS_PROTOTYPE: {\r\n        for (let instance of (<ClassPrototype>element).instances.values()) {\r\n          let instanceName = name;\r\n          if (instance.is(CommonFlags.GENERIC)) {\r\n            let fullName = instance.internalName;\r\n            instanceName += fullName.substring(fullName.lastIndexOf(\"<\"));\r\n          }\r\n          let ctor = instance.constructorInstance;\r\n          if (ctor) this.makeModuleExport(instanceName + INSTANCE_DELIMITER + ctor.simpleName, ctor, prefix);\r\n          this.makeModuleExport(instanceName, instance, prefix);\r\n        }\r\n        break;\r\n      }\r\n\r\n      // all possible members already handled above\r\n      case ElementKind.ENUM:\r\n      case ElementKind.CLASS:\r\n      case ElementKind.NAMESPACE: break;\r\n\r\n      default: assert(false);\r\n    }\r\n  }\r\n\r\n  // sources\r\n\r\n  /** Compiles a source by looking it up by path first. */\r\n  compileSourceByPath(normalizedPathWithoutExtension: string, reportNode: Node): void {\r\n    var source = this.program.lookupSourceByPath(normalizedPathWithoutExtension);\r\n    if (source) this.compileSource(source);\r\n    else {\r\n      this.error(\r\n        DiagnosticCode.File_0_not_found,\r\n        reportNode.range, normalizedPathWithoutExtension\r\n      );\r\n    }\r\n  }\r\n\r\n  /** Compiles a source. */\r\n  compileSource(source: Source): void {\r\n    if (source.is(CommonFlags.COMPILED)) return;\r\n    source.set(CommonFlags.COMPILED);\r\n\r\n    // compile top-level statements\r\n    var noTreeShaking = this.options.noTreeShaking;\r\n    var isEntry = source.isEntry;\r\n    var startFunctionInstance = this.startFunctionInstance;\r\n    var startFunctionBody = this.startFunctionBody;\r\n    var statements = source.statements;\r\n    for (let i = 0, k = statements.length; i < k; ++i) {\r\n      let statement = statements[i];\r\n      switch (statement.kind) {\r\n        case NodeKind.CLASSDECLARATION: {\r\n          if (\r\n            (noTreeShaking || (isEntry && statement.is(CommonFlags.EXPORT))) &&\r\n            !(<ClassDeclaration>statement).isGeneric\r\n          ) {\r\n            this.compileClassDeclaration(<ClassDeclaration>statement, [], null);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.INTERFACEDECLARATION: break;\r\n        case NodeKind.ENUMDECLARATION: {\r\n          if (noTreeShaking || (isEntry && statement.is(CommonFlags.EXPORT))) {\r\n            this.compileEnumDeclaration(<EnumDeclaration>statement);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.FUNCTIONDECLARATION: {\r\n          if (\r\n            (noTreeShaking || (isEntry && statement.is(CommonFlags.EXPORT))) &&\r\n            !(<FunctionDeclaration>statement).isGeneric\r\n          ) {\r\n            this.compileFunctionDeclaration(<FunctionDeclaration>statement, []);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.IMPORT: {\r\n          this.compileSourceByPath(\r\n            (<ImportStatement>statement).normalizedPath,\r\n            (<ImportStatement>statement).path\r\n          );\r\n          break;\r\n        }\r\n        case NodeKind.NAMESPACEDECLARATION: {\r\n          if (noTreeShaking || (isEntry && statement.is(CommonFlags.EXPORT))) {\r\n            this.compileNamespaceDeclaration(<NamespaceDeclaration>statement);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.VARIABLE: { // global, always compiled as initializers might have side effects\r\n          let variableInit = this.compileVariableStatement(<VariableStatement>statement);\r\n          if (variableInit) startFunctionBody.push(variableInit);\r\n          break;\r\n        }\r\n        case NodeKind.EXPORT: {\r\n          if ((<ExportStatement>statement).normalizedPath != null) {\r\n            this.compileSourceByPath(\r\n              <string>(<ExportStatement>statement).normalizedPath,\r\n              <StringLiteralExpression>(<ExportStatement>statement).path\r\n            );\r\n          }\r\n          if (noTreeShaking || isEntry) {\r\n            this.compileExportStatement(<ExportStatement>statement);\r\n          }\r\n          break;\r\n        }\r\n        default: { // otherwise a top-level statement that is part of the start function's body\r\n          let previousFunction = this.currentFunction;\r\n          this.currentFunction = startFunctionInstance;\r\n          startFunctionBody.push(this.compileStatement(statement));\r\n          this.currentFunction = previousFunction;\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  // globals\r\n\r\n  compileGlobalDeclaration(declaration: VariableDeclaration): Global | null {\r\n    // look up the initialized program element\r\n    var element = assert(this.program.elementsLookup.get(declaration.fileLevelInternalName));\r\n    assert(element.kind == ElementKind.GLOBAL);\r\n    if (!this.compileGlobal(<Global>element)) return null; // reports\r\n    return <Global>element;\r\n  }\r\n\r\n  compileGlobal(global: Global): bool {\r\n    if (global.is(CommonFlags.COMPILED)) return true;\r\n    global.set(CommonFlags.COMPILED);\r\n\r\n    var module = this.module;\r\n    var declaration = global.declaration;\r\n    var initExpr: ExpressionRef = 0;\r\n\r\n    if (global.type == Type.void) { // type is void if not yet resolved or not annotated\r\n      if (declaration) {\r\n\r\n        // resolve now if annotated\r\n        if (declaration.type) {\r\n          let resolvedType = this.resolver.resolveType(declaration.type); // reports\r\n          if (!resolvedType) return false;\r\n          if (resolvedType == Type.void) {\r\n            this.error(\r\n              DiagnosticCode.Type_expected,\r\n              declaration.type.range\r\n            );\r\n            return false;\r\n          }\r\n          global.type = resolvedType;\r\n\r\n        // infer from initializer if not annotated\r\n        } else if (declaration.initializer) { // infer type using void/NONE for literal inference\r\n          initExpr = this.compileExpressionRetainType( // reports\r\n            declaration.initializer,\r\n            Type.void,\r\n            WrapMode.WRAP\r\n          );\r\n          if (this.currentType == Type.void) {\r\n            this.error(\r\n              DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n              declaration.initializer.range, this.currentType.toString(), \"<auto>\"\r\n            );\r\n            return false;\r\n          }\r\n          global.type = this.currentType;\r\n\r\n        // must either be annotated or have an initializer\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Type_expected,\r\n            declaration.name.range.atEnd\r\n          );\r\n          return false;\r\n        }\r\n      } else {\r\n        assert(false); // must have a declaration if 'void' (and thus resolved later on)\r\n      }\r\n    }\r\n\r\n    // ambient builtins like 'HEAP_BASE' need to be resolved but are added explicitly\r\n    if (global.is(CommonFlags.AMBIENT) && global.hasDecorator(DecoratorFlags.BUILTIN)) return true;\r\n\r\n    var nativeType = global.type.toNativeType();\r\n    var isDeclaredConstant = global.is(CommonFlags.CONST) || global.is(CommonFlags.STATIC | CommonFlags.READONLY);\r\n\r\n    // handle imports\r\n    if (global.is(CommonFlags.AMBIENT)) {\r\n\r\n      // constant global\r\n      if (isDeclaredConstant || this.options.hasFeature(Feature.MUTABLE_GLOBAL)) {\r\n        global.set(CommonFlags.MODULE_IMPORT);\r\n        if (declaration) {\r\n          mangleImportName(global, declaration, global.parent);\r\n        } else {\r\n          mangleImportName_moduleName = \"env\";\r\n          mangleImportName_elementName = global.simpleName;\r\n        }\r\n        module.addGlobalImport(\r\n          global.internalName,\r\n          mangleImportName_moduleName,\r\n          mangleImportName_elementName,\r\n          nativeType\r\n        );\r\n        global.set(CommonFlags.COMPILED);\r\n        return true;\r\n\r\n      // importing mutable globals is not supported in the MVP\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          assert(declaration).range\r\n        );\r\n      }\r\n      return false;\r\n    }\r\n\r\n    // the MVP does not yet support initializer expressions other than constant values (and constant\r\n    // get_globals), hence such initializations must be performed in the start function for now.\r\n    var initializeInStart = false;\r\n\r\n    // evaluate initializer if present\r\n    if (declaration !== null && declaration.initializer !== null) {\r\n      if (!initExpr) {\r\n        initExpr = this.compileExpression(\r\n          declaration.initializer,\r\n          global.type,\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.WRAP\r\n        );\r\n      }\r\n\r\n      if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n        if (isDeclaredConstant) {\r\n          initExpr = module.precomputeExpression(initExpr);\r\n          if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n            this.warning(\r\n              DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n              declaration.range\r\n            );\r\n            initializeInStart = true;\r\n          }\r\n        } else {\r\n          initializeInStart = true;\r\n        }\r\n      }\r\n\r\n      // explicitly inline if annotated\r\n      if (global.hasDecorator(DecoratorFlags.INLINE)) {\r\n        if (!initializeInStart) { // reported above\r\n          assert(getExpressionId(initExpr) == ExpressionId.Const);\r\n          let exprType = getExpressionType(initExpr);\r\n          switch (exprType) {\r\n            case NativeType.I32: {\r\n              global.constantValueKind = ConstantValueKind.INTEGER;\r\n              global.constantIntegerValue = i64_new(getConstValueI32(initExpr), 0);\r\n              break;\r\n            }\r\n            case NativeType.I64: {\r\n              global.constantValueKind = ConstantValueKind.INTEGER;\r\n              global.constantIntegerValue = i64_new(\r\n                getConstValueI64Low(initExpr),\r\n                getConstValueI64High(initExpr)\r\n              );\r\n              break;\r\n            }\r\n            case NativeType.F32: {\r\n              global.constantValueKind = ConstantValueKind.FLOAT;\r\n              global.constantFloatValue = getConstValueF32(initExpr);\r\n              break;\r\n            }\r\n            case NativeType.F64: {\r\n              global.constantValueKind = ConstantValueKind.FLOAT;\r\n              global.constantFloatValue = getConstValueF64(initExpr);\r\n              break;\r\n            }\r\n            default: {\r\n              assert(false);\r\n              return false;\r\n            }\r\n          }\r\n          global.set(CommonFlags.INLINED); // inline the value from now on\r\n        }\r\n      }\r\n\r\n    // initialize to zero if there's no initializer\r\n    } else {\r\n      initExpr = global.type.toNativeZero(module);\r\n    }\r\n\r\n    var internalName = global.internalName;\r\n\r\n    if (initializeInStart) { // initialize to mutable zero and set the actual value in start\r\n      module.addGlobal(internalName, nativeType, true, global.type.toNativeZero(module));\r\n      this.startFunctionBody.push(module.createSetGlobal(internalName, initExpr));\r\n\r\n    } else { // compile normally\r\n      module.addGlobal(internalName, nativeType, !isDeclaredConstant, initExpr);\r\n    }\r\n    return true;\r\n  }\r\n\r\n  // enums\r\n\r\n  compileEnumDeclaration(declaration: EnumDeclaration): Enum | null {\r\n    var element = assert(this.program.elementsLookup.get(declaration.fileLevelInternalName));\r\n    assert(element.kind == ElementKind.ENUM);\r\n    if (!this.compileEnum(<Enum>element)) return null;\r\n    return <Enum>element;\r\n  }\r\n\r\n  compileEnum(element: Enum): bool {\r\n    if (element.is(CommonFlags.COMPILED)) return true;\r\n    element.set(CommonFlags.COMPILED);\r\n\r\n    var module = this.module;\r\n    this.currentEnum = element;\r\n    var previousValue: EnumValue | null = null;\r\n    var previousValueIsMut = false;\r\n\r\n    if (element.members) {\r\n      for (let member of element.members.values()) {\r\n        if (member.kind != ElementKind.ENUMVALUE) continue; // happens if an enum is also a namespace\r\n        let initInStart = false;\r\n        let val = <EnumValue>member;\r\n        let valueDeclaration = val.declaration;\r\n        val.set(CommonFlags.COMPILED);\r\n        let initExpr: ExpressionRef;\r\n        if (valueDeclaration.value) {\r\n          initExpr = this.compileExpression(\r\n            <Expression>valueDeclaration.value,\r\n            Type.i32,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n          if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n            if (element.is(CommonFlags.CONST)) {\r\n              initExpr = module.precomputeExpression(initExpr);\r\n              if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n                this.error(\r\n                  DiagnosticCode.In_const_enum_declarations_member_initializer_must_be_constant_expression,\r\n                  valueDeclaration.value.range\r\n                );\r\n                initInStart = true;\r\n              }\r\n            } else {\r\n              initInStart = true;\r\n            }\r\n          }\r\n        } else if (previousValue == null) {\r\n          initExpr = module.createI32(0);\r\n        } else {\r\n          if (previousValueIsMut) {\r\n            this.error(\r\n              DiagnosticCode.Enum_member_must_have_initializer,\r\n              valueDeclaration.range\r\n            );\r\n          }\r\n          initExpr = module.createBinary(BinaryOp.AddI32,\r\n            module.createGetGlobal(previousValue.internalName, NativeType.I32),\r\n            module.createI32(1)\r\n          );\r\n          initExpr = module.precomputeExpression(initExpr);\r\n          if (getExpressionId(initExpr) != ExpressionId.Const) {\r\n            if (element.is(CommonFlags.CONST)) {\r\n              this.error(\r\n                DiagnosticCode.In_const_enum_declarations_member_initializer_must_be_constant_expression,\r\n                valueDeclaration.range\r\n              );\r\n            }\r\n            initInStart = true;\r\n          }\r\n        }\r\n        if (initInStart) {\r\n          module.addGlobal(val.internalName, NativeType.I32, true, module.createI32(0));\r\n          this.startFunctionBody.push(module.createSetGlobal(val.internalName, initExpr));\r\n          previousValueIsMut = true;\r\n        } else {\r\n          module.addGlobal(val.internalName, NativeType.I32, !element.is(CommonFlags.CONST), initExpr);\r\n          previousValueIsMut = false;\r\n        }\r\n        previousValue = <EnumValue>val;\r\n      }\r\n    }\r\n    this.currentEnum = null;\r\n    return true;\r\n  }\r\n\r\n  // functions\r\n\r\n  /** Compiles a top-level function given its declaration. */\r\n  compileFunctionDeclaration(\r\n    declaration: FunctionDeclaration,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ): Function | null {\r\n    var element = assert(this.program.elementsLookup.get(declaration.fileLevelInternalName));\r\n    assert(element.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n    return this.compileFunctionUsingTypeArguments( // reports\r\n      <FunctionPrototype>element,\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      null, // no outer scope (is top level)\r\n      (<FunctionPrototype>element).declaration.name\r\n    );\r\n  }\r\n\r\n  /** Resolves the specified type arguments prior to compiling the resulting function instance. */\r\n  compileFunctionUsingTypeArguments(\r\n    prototype: FunctionPrototype,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    outerScope: Flow | null,\r\n    reportNode: Node\r\n  ): Function | null {\r\n    var instance = this.resolver.resolveFunctionInclTypeArguments(\r\n      prototype,\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      reportNode\r\n    );\r\n    if (!instance) return null;\r\n    instance.outerScope = outerScope;\r\n    if (!this.compileFunction(instance)) return null; // reports\r\n    return instance;\r\n  }\r\n\r\n  /** Either reuses or creates the function type matching the specified signature. */\r\n  ensureFunctionType(\r\n    parameterTypes: Type[] | null,\r\n    returnType: Type,\r\n    thisType: Type | null = null\r\n  ): FunctionTypeRef {\r\n    var numParameters = parameterTypes ? parameterTypes.length : 0;\r\n    var paramTypes: NativeType[];\r\n    var index = 0;\r\n    if (thisType) {\r\n      paramTypes = new Array(1 + numParameters);\r\n      paramTypes[0] = thisType.toNativeType();\r\n      index = 1;\r\n    } else {\r\n      paramTypes = new Array(numParameters);\r\n    }\r\n    if (parameterTypes) {\r\n      for (let i = 0; i < numParameters; ++i, ++index) {\r\n        paramTypes[index] = parameterTypes[i].toNativeType();\r\n      }\r\n    }\r\n    var resultType = returnType.toNativeType();\r\n    var module = this.module;\r\n    var typeRef = module.getFunctionTypeBySignature(resultType, paramTypes);\r\n    if (!typeRef) {\r\n      let name = Signature.makeSignatureString(parameterTypes, returnType, thisType);\r\n      typeRef = module.addFunctionType(name, resultType, paramTypes);\r\n    }\r\n    return typeRef;\r\n  }\r\n\r\n  /** Compiles a readily resolved function instance. */\r\n  compileFunction(instance: Function): bool {\r\n    if (instance.is(CommonFlags.COMPILED)) return true;\r\n    assert(!(instance.is(CommonFlags.AMBIENT) && instance.hasDecorator(DecoratorFlags.BUILTIN)));\r\n    instance.set(CommonFlags.COMPILED);\r\n\r\n    // check that modifiers are matching\r\n    var declaration = instance.prototype.declaration;\r\n    var body = declaration.body;\r\n    if (body) {\r\n      if (instance.is(CommonFlags.AMBIENT)) {\r\n        this.error(\r\n          DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,\r\n          declaration.name.range\r\n        );\r\n      }\r\n    } else {\r\n      if (!instance.is(CommonFlags.AMBIENT)) {\r\n        this.error(\r\n          DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,\r\n          declaration.name.range\r\n        );\r\n      }\r\n    }\r\n\r\n    var ref: FunctionRef;\r\n    var signature = instance.signature;\r\n    var typeRef = this.ensureFunctionType(signature.parameterTypes, signature.returnType, signature.thisType);\r\n    var module = this.module;\r\n    if (body) {\r\n      let isConstructor = instance.is(CommonFlags.CONSTRUCTOR);\r\n      let returnType = instance.signature.returnType;\r\n\r\n      // compile body\r\n      let previousFunction = this.currentFunction;\r\n      this.currentFunction = instance;\r\n      let flow = instance.flow;\r\n      let stmt: ExpressionRef;\r\n      if (body.kind == NodeKind.EXPRESSION) { // () => expression\r\n        assert(!instance.isAny(CommonFlags.CONSTRUCTOR | CommonFlags.GET | CommonFlags.SET | CommonFlags.MAIN));\r\n        assert(instance.is(CommonFlags.ARROW));\r\n        stmt = this.compileExpression(\r\n          (<ExpressionStatement>body).expression,\r\n          returnType,\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.NONE\r\n        );\r\n        flow.set(FlowFlags.RETURNS);\r\n        if (!flow.canOverflow(stmt, returnType)) flow.set(FlowFlags.RETURNS_WRAPPED);\r\n        flow.finalize();\r\n      } else {\r\n        assert(body.kind == NodeKind.BLOCK);\r\n        let stmts = this.compileStatements((<BlockStatement>body).statements);\r\n        if (instance.is(CommonFlags.MAIN)) {\r\n          module.addGlobal(\"~started\", NativeType.I32, true, module.createI32(0));\r\n          stmts.unshift(\r\n            module.createIf(\r\n              module.createUnary(\r\n                UnaryOp.EqzI32,\r\n                module.createGetGlobal(\"~started\", NativeType.I32)\r\n              ),\r\n              module.createBlock(null, [\r\n                module.createCall(\"start\", null, NativeType.None),\r\n                module.createSetGlobal(\"~started\", module.createI32(1))\r\n              ])\r\n            )\r\n          );\r\n        }\r\n        flow.finalize();\r\n        if (isConstructor) {\r\n          let nativeSizeType = this.options.nativeSizeType;\r\n          assert(instance.is(CommonFlags.INSTANCE));\r\n\r\n          // implicitly return `this` if the constructor doesn't always return on its own\r\n          if (!flow.is(FlowFlags.RETURNS)) {\r\n\r\n            // if all branches are guaranteed to allocate, skip the final conditional allocation\r\n            if (flow.is(FlowFlags.ALLOCATES)) {\r\n              stmts.push(module.createGetLocal(0, nativeSizeType));\r\n\r\n            // if not all branches are guaranteed to allocate, also append a conditional allocation\r\n            } else {\r\n              let parent = assert(instance.parent);\r\n              assert(parent.kind == ElementKind.CLASS);\r\n              stmts.push(module.createTeeLocal(0,\r\n                this.makeConditionalAllocate(<Class>parent, declaration.name)\r\n              ));\r\n            }\r\n          }\r\n\r\n        // make sure all branches return\r\n        } else if (returnType != Type.void && !flow.is(FlowFlags.RETURNS)) {\r\n          this.error(\r\n            DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,\r\n            declaration.signature.returnType.range\r\n          );\r\n        }\r\n        stmt = !stmts.length\r\n          ? module.createNop()\r\n          : stmts.length == 1\r\n            ? stmts[0]\r\n            : module.createBlock(null, stmts, returnType.toNativeType());\r\n      }\r\n      this.currentFunction = previousFunction;\r\n\r\n      // create the function\r\n      ref = module.addFunction(\r\n        instance.internalName,\r\n        typeRef,\r\n        typesToNativeTypes(instance.additionalLocals),\r\n        stmt\r\n      );\r\n\r\n      // concrete functions cannot have an annotated external name\r\n      if (instance.hasDecorator(DecoratorFlags.EXTERNAL)) {\r\n        let decorator = assert(findDecorator(DecoratorKind.EXTERNAL, declaration.decorators));\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          decorator.range\r\n        );\r\n      }\r\n\r\n    } else {\r\n      instance.set(CommonFlags.MODULE_IMPORT);\r\n      mangleImportName(instance, declaration, instance.prototype.parent); // TODO: check for duplicates\r\n\r\n      // create the function import\r\n      ref = module.addFunctionImport(\r\n        instance.internalName,\r\n        mangleImportName_moduleName,\r\n        mangleImportName_elementName,\r\n        typeRef\r\n      );\r\n    }\r\n\r\n    instance.finalize(module, ref);\r\n    return true;\r\n  }\r\n\r\n  // namespaces\r\n\r\n  compileNamespaceDeclaration(declaration: NamespaceDeclaration): void {\r\n    var members = declaration.members;\r\n    var noTreeShaking = this.options.noTreeShaking;\r\n    for (let i = 0, k = members.length; i < k; ++i) {\r\n      let member = members[i];\r\n      switch (member.kind) {\r\n        case NodeKind.CLASSDECLARATION: {\r\n          if (\r\n            (noTreeShaking || member.is(CommonFlags.EXPORT)) &&\r\n            !(<ClassDeclaration>member).isGeneric\r\n          ) {\r\n            this.compileClassDeclaration(<ClassDeclaration>member, []);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.INTERFACEDECLARATION: {\r\n          if (\r\n            (noTreeShaking || member.is(CommonFlags.EXPORT)) &&\r\n            !(<InterfaceDeclaration>member).isGeneric\r\n          ) {\r\n            this.compileInterfaceDeclaration(<InterfaceDeclaration>member, []);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.ENUMDECLARATION: {\r\n          if (noTreeShaking || member.is(CommonFlags.EXPORT)) {\r\n            this.compileEnumDeclaration(<EnumDeclaration>member);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.FUNCTIONDECLARATION: {\r\n          if (\r\n            (noTreeShaking || member.is(CommonFlags.EXPORT)) &&\r\n            !(<FunctionDeclaration>member).isGeneric\r\n          ) {\r\n            this.compileFunctionDeclaration(<FunctionDeclaration>member, []);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.NAMESPACEDECLARATION: {\r\n          if (noTreeShaking || member.is(CommonFlags.EXPORT)) {\r\n            this.compileNamespaceDeclaration(<NamespaceDeclaration>member);\r\n          }\r\n          break;\r\n        }\r\n        case NodeKind.VARIABLE: {\r\n          if (noTreeShaking || member.is(CommonFlags.EXPORT)) {\r\n            let variableInit = this.compileVariableStatement(<VariableStatement>member, true);\r\n            if (variableInit) this.startFunctionBody.push(variableInit);\r\n          }\r\n          break;\r\n        }\r\n        default: assert(false);\r\n      }\r\n    }\r\n  }\r\n\r\n  compileNamespace(ns: Namespace): void {\r\n    if (!ns.members) return;\r\n\r\n    var noTreeShaking = this.options.noTreeShaking;\r\n    for (let element of ns.members.values()) {\r\n      switch (element.kind) {\r\n        case ElementKind.CLASS_PROTOTYPE: {\r\n          if (\r\n            (\r\n              noTreeShaking ||\r\n              (<ClassPrototype>element).is(CommonFlags.EXPORT)\r\n            ) && !(<ClassPrototype>element).is(CommonFlags.GENERIC)\r\n          ) {\r\n            this.compileClassUsingTypeArguments(<ClassPrototype>element, []);\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.ENUM: {\r\n          this.compileEnum(<Enum>element);\r\n          break;\r\n        }\r\n        case ElementKind.FUNCTION_PROTOTYPE: {\r\n          if (\r\n            (\r\n              noTreeShaking || (<FunctionPrototype>element).is(CommonFlags.EXPORT)\r\n            ) && !(<FunctionPrototype>element).is(CommonFlags.GENERIC)\r\n          ) {\r\n            if (element.hasDecorator(DecoratorFlags.BUILTIN)) break;\r\n            this.compileFunctionUsingTypeArguments(\r\n              <FunctionPrototype>element,\r\n              [],\r\n              null, // no contextual type arguments\r\n              null, // no outer scope\r\n              (<FunctionPrototype>element).declaration.name\r\n            );\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.GLOBAL: {\r\n          this.compileGlobal(<Global>element);\r\n          break;\r\n        }\r\n        case ElementKind.NAMESPACE: {\r\n          this.compileNamespace(<Namespace>element);\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  // exports\r\n\r\n  compileExportStatement(statement: ExportStatement): void {\r\n    var fileLevelExports = this.program.fileLevelExports;\r\n    var members = statement.members;\r\n    if (!members) return; // filespace\r\n    for (let i = 0, k = members.length; i < k; ++i) {\r\n      let member = members[i];\r\n      let element = fileLevelExports.get(\r\n        statement.range.source.internalPath + PATH_DELIMITER + member.externalName.text\r\n      );\r\n      if (!element) continue; // reported in Program#initialize\r\n      switch (element.kind) {\r\n        case ElementKind.CLASS_PROTOTYPE: {\r\n          if (!(<ClassPrototype>element).is(CommonFlags.GENERIC)) {\r\n            this.compileClassUsingTypeArguments(<ClassPrototype>element, []);\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.ENUM: {\r\n          this.compileEnum(<Enum>element);\r\n          break;\r\n        }\r\n        case ElementKind.FUNCTION_PROTOTYPE: {\r\n          if (\r\n            !(<FunctionPrototype>element).is(CommonFlags.GENERIC) &&\r\n            statement.range.source.isEntry\r\n          ) {\r\n            this.compileFunctionUsingTypeArguments(\r\n              <FunctionPrototype>element,\r\n              [],\r\n              null, // no contextual type arguments\r\n              null, // no outer scope\r\n              (<FunctionPrototype>element).declaration.name\r\n            );\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.GLOBAL: {\r\n          this.compileGlobal(<Global>element);\r\n          break;\r\n        }\r\n        case ElementKind.NAMESPACE: {\r\n          this.compileNamespace(<Namespace>element);\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  // classes\r\n\r\n  compileClassDeclaration(\r\n    declaration: ClassDeclaration,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ): void {\r\n    var element = assert(this.program.elementsLookup.get(declaration.fileLevelInternalName));\r\n    assert(element.kind == ElementKind.CLASS_PROTOTYPE);\r\n    this.compileClassUsingTypeArguments(\r\n      <ClassPrototype>element,\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      declaration\r\n    );\r\n  }\r\n\r\n  compileClassUsingTypeArguments(\r\n    prototype: ClassPrototype,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    alternativeReportNode: Node | null = null\r\n  ): void {\r\n    var instance = this.resolver.resolveClassInclTypeArguments(\r\n      prototype,\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      alternativeReportNode || prototype.declaration\r\n    );\r\n    if (!instance) return;\r\n    this.compileClass(instance);\r\n  }\r\n\r\n  compileClass(instance: Class): bool {\r\n    if (instance.is(CommonFlags.COMPILED)) return true;\r\n    instance.set(CommonFlags.COMPILED);\r\n\r\n    var staticMembers = instance.prototype.members;\r\n    if (staticMembers) {\r\n      for (let element of staticMembers.values()) {\r\n        switch (element.kind) {\r\n          case ElementKind.GLOBAL: {\r\n            this.compileGlobal(<Global>element);\r\n            break;\r\n          }\r\n          case ElementKind.FUNCTION_PROTOTYPE: {\r\n            if (\r\n              !(<FunctionPrototype>element).is(CommonFlags.GENERIC)\r\n            ) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                <FunctionPrototype>element,\r\n                [], null, null,\r\n                (<FunctionPrototype>element).declaration.name\r\n              );\r\n            }\r\n            break;\r\n          }\r\n          case ElementKind.PROPERTY: {\r\n            let getter = (<Property>element).getterPrototype;\r\n            if (getter) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                getter,\r\n                [], null, null,\r\n                getter.declaration.name\r\n              );\r\n            }\r\n            let setter = (<Property>element).setterPrototype;\r\n            if (setter) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                setter,\r\n                [], null, null,\r\n                setter.declaration.name\r\n              );\r\n            }\r\n            break;\r\n          }\r\n        }\r\n      }\r\n    }\r\n    var ctorInstance = instance.constructorInstance;\r\n    if (ctorInstance) this.compileFunction(ctorInstance);\r\n    var instanceMembers = instance.members;\r\n    if (instanceMembers) {\r\n      for (let element of instanceMembers.values()) {\r\n        switch (element.kind) {\r\n          case ElementKind.FUNCTION_PROTOTYPE: {\r\n            if (\r\n              !(<FunctionPrototype>element).is(CommonFlags.GENERIC)\r\n            ) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                <FunctionPrototype>element,\r\n                [],\r\n                instance.contextualTypeArguments,\r\n                null, // no outer scope\r\n                (<FunctionPrototype>element).declaration.name\r\n              );\r\n            }\r\n            break;\r\n          }\r\n          case ElementKind.FIELD: {\r\n            element.set(CommonFlags.COMPILED);\r\n            break;\r\n          }\r\n          case ElementKind.PROPERTY: {\r\n            let getter = (<Property>element).getterPrototype;\r\n            if (getter) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                getter,\r\n                [], instance.contextualTypeArguments, null,\r\n                getter.declaration.name\r\n              );\r\n            }\r\n            let setter = (<Property>element).setterPrototype;\r\n            if (setter) {\r\n              this.compileFunctionUsingTypeArguments(\r\n                setter,\r\n                [], instance.contextualTypeArguments, null,\r\n                setter.declaration.name\r\n              );\r\n            }\r\n            break;\r\n          }\r\n        }\r\n      }\r\n    }\r\n    return true;\r\n  }\r\n\r\n  compileInterfaceDeclaration(\r\n    declaration: InterfaceDeclaration,\r\n    typeArguments: TypeNode[],\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    alternativeReportNode: Node | null = null\r\n  ): void {\r\n    // TODO\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      declaration.range\r\n    );\r\n  }\r\n\r\n  // memory\r\n\r\n  /** Adds a static memory segment with the specified data. */\r\n  addMemorySegment(buffer: Uint8Array, alignment: i32 = 8): MemorySegment {\r\n    var memoryOffset = i64_align(this.memoryOffset, alignment);\r\n    var segment = MemorySegment.create(buffer, memoryOffset);\r\n    this.memorySegments.push(segment);\r\n    this.memoryOffset = i64_add(memoryOffset, i64_new(buffer.length, 0));\r\n    return segment;\r\n  }\r\n\r\n  // function table\r\n\r\n  /** Ensures that a table entry exists for the specified function and returns its index. */\r\n  ensureFunctionTableEntry(func: Function): i32 {\r\n    assert(func.is(CommonFlags.COMPILED));\r\n    if (func.functionTableIndex >= 0) {\r\n      return func.functionTableIndex;\r\n    }\r\n    var functionTable = this.functionTable;\r\n    var index = functionTable.length;\r\n    if (!func.is(CommonFlags.TRAMPOLINE) && func.signature.requiredParameters < func.signature.parameterTypes.length) {\r\n      // insert the trampoline if the function has optional parameters\r\n      func = this.ensureTrampoline(func);\r\n    }\r\n    functionTable.push(func.ref);\r\n    func.functionTableIndex = index;\r\n    return index;\r\n  }\r\n\r\n  // statements\r\n\r\n  compileStatement(statement: Statement): ExpressionRef {\r\n    var module = this.module;\r\n    var stmt: ExpressionRef;\r\n    switch (statement.kind) {\r\n      case NodeKind.BLOCK: {\r\n        stmt = this.compileBlockStatement(<BlockStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.BREAK: {\r\n        stmt = this.compileBreakStatement(<BreakStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.CONTINUE: {\r\n        stmt = this.compileContinueStatement(<ContinueStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.DO: {\r\n        stmt = this.compileDoStatement(<DoStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.EMPTY: {\r\n        stmt = this.compileEmptyStatement(<EmptyStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.EXPRESSION: {\r\n        stmt = this.compileExpressionStatement(<ExpressionStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.FOR: {\r\n        stmt = this.compileForStatement(<ForStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.IF: {\r\n        stmt = this.compileIfStatement(<IfStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.RETURN: {\r\n        stmt = this.compileReturnStatement(<ReturnStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.SWITCH: {\r\n        stmt = this.compileSwitchStatement(<SwitchStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.THROW: {\r\n        stmt = this.compileThrowStatement(<ThrowStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.TRY: {\r\n        stmt = this.compileTryStatement(<TryStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.VARIABLE: {\r\n        stmt = this.compileVariableStatement(<VariableStatement>statement);\r\n        if (!stmt) stmt = module.createNop();\r\n        break;\r\n      }\r\n      case NodeKind.VOID: {\r\n        stmt = this.compileVoidStatement(<VoidStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.WHILE: {\r\n        stmt = this.compileWhileStatement(<WhileStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.TYPEDECLARATION: {\r\n        // type declarations must be top-level because function bodies are evaluated when\r\n        // reachaable only.\r\n        if (this.currentFunction == this.startFunctionInstance) {\r\n          return module.createNop();\r\n        }\r\n        // otherwise fall-through\r\n      }\r\n      default: {\r\n        assert(false);\r\n        stmt = module.createUnreachable();\r\n      }\r\n    }\r\n    if (this.options.sourceMap) this.addDebugLocation(stmt, statement.range);\r\n    return stmt;\r\n  }\r\n\r\n  compileStatements(statements: Statement[]): ExpressionRef[] {\r\n    var numStatements = statements.length;\r\n    var stmts = new Array<ExpressionRef>(numStatements);\r\n    stmts.length = 0;\r\n    var flow = this.currentFunction.flow;\r\n    for (let i = 0; i < numStatements; ++i) {\r\n      let stmt = this.compileStatement(statements[i]);\r\n      switch (getExpressionId(stmt)) {\r\n        case ExpressionId.Block: {\r\n          if (!getBlockName(stmt)) {\r\n            for (let j = 0, k = getBlockChildCount(stmt); j < k; ++j) stmts.push(getBlockChild(stmt, j));\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: stmts.push(stmt);\r\n        case ExpressionId.Nop:\r\n      }\r\n      if (flow.isAny(FlowFlags.ANY_TERMINATING)) {\r\n        if (needsExplicitUnreachable(stmt)) stmts.push(this.module.createUnreachable());\r\n        break;\r\n      }\r\n    }\r\n    return stmts;\r\n  }\r\n\r\n  compileBlockStatement(statement: BlockStatement): ExpressionRef {\r\n    var statements = statement.statements;\r\n    var parentFlow = this.currentFunction.flow;\r\n    var flow = parentFlow.fork();\r\n    this.currentFunction.flow = flow;\r\n\r\n    var stmts = this.compileStatements(statements);\r\n    var stmt = stmts.length == 0\r\n      ? this.module.createNop()\r\n      : stmts.length == 1\r\n        ? stmts[0]\r\n        : this.module.createBlock(null, stmts,getExpressionType(stmts[stmts.length - 1]));\r\n\r\n    this.currentFunction.flow = flow.free();\r\n    parentFlow.inherit(flow);\r\n    return stmt;\r\n  }\r\n\r\n  compileBreakStatement(statement: BreakStatement): ExpressionRef {\r\n    var module = this.module;\r\n    if (statement.label) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        statement.label.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    var flow = this.currentFunction.flow;\r\n    var breakLabel = flow.breakLabel;\r\n    if (breakLabel == null) {\r\n      this.error(\r\n        DiagnosticCode.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement,\r\n        statement.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    flow.set(FlowFlags.BREAKS);\r\n    return module.createBreak(breakLabel);\r\n  }\r\n\r\n  compileContinueStatement(statement: ContinueStatement): ExpressionRef {\r\n    var module = this.module;\r\n    var label = statement.label;\r\n    if (label) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        label.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    // Check if 'continue' is allowed here\r\n    var flow = this.currentFunction.flow;\r\n    var continueLabel = flow.continueLabel;\r\n    if (continueLabel == null) {\r\n      this.error(\r\n        DiagnosticCode.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement,\r\n        statement.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    flow.set(FlowFlags.CONTINUES);\r\n    return module.createBreak(continueLabel);\r\n  }\r\n\r\n  compileDoStatement(statement: DoStatement): ExpressionRef {\r\n    var currentFunction = this.currentFunction;\r\n    var module = this.module;\r\n\r\n    var label = currentFunction.enterBreakContext();\r\n    var parentFlow = currentFunction.flow;\r\n    var flow = parentFlow.fork();\r\n    currentFunction.flow = flow;\r\n    var breakLabel = \"break|\" + label;\r\n    flow.breakLabel = breakLabel;\r\n    var continueLabel = \"continue|\" + label;\r\n    flow.continueLabel = continueLabel;\r\n\r\n    var body = this.compileStatement(statement.statement);\r\n    var condExpr = this.makeIsTrueish(\r\n      this.compileExpression(statement.condition, Type.i32, ConversionKind.NONE, WrapMode.NONE),\r\n      this.currentType\r\n    );\r\n    // TODO: check if condition is always false and if so, omit it (just a block)\r\n\r\n    // Switch back to the parent flow\r\n    currentFunction.flow = flow.free();\r\n    currentFunction.leaveBreakContext();\r\n    var terminated = flow.isAny(FlowFlags.ANY_TERMINATING);\r\n    flow.unset(\r\n      FlowFlags.BREAKS |\r\n      FlowFlags.CONDITIONALLY_BREAKS |\r\n      FlowFlags.CONTINUES |\r\n      FlowFlags.CONDITIONALLY_CONTINUES\r\n    );\r\n    parentFlow.inherit(flow);\r\n\r\n    var block: ExpressionRef[] = [\r\n      module.createLoop(continueLabel,\r\n        terminated\r\n          ? body // skip trailing continue if unnecessary\r\n          : module.createBlock(null, [\r\n              body,\r\n              module.createBreak(continueLabel, condExpr)\r\n            ], NativeType.None)\r\n      )\r\n    ];\r\n    if (terminated) block.push(module.createUnreachable());\r\n    return module.createBlock(breakLabel, block);\r\n  }\r\n\r\n  compileEmptyStatement(statement: EmptyStatement): ExpressionRef {\r\n    return this.module.createNop();\r\n  }\r\n\r\n  compileExpressionStatement(statement: ExpressionStatement): ExpressionRef {\r\n    var expr = this.compileExpression(statement.expression, Type.void, ConversionKind.NONE, WrapMode.NONE);\r\n    if (this.currentType != Type.void) {\r\n      expr = this.module.createDrop(expr);\r\n      this.currentType = Type.void;\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  compileForStatement(statement: ForStatement): ExpressionRef {\r\n    // A for statement initiates a new branch with its own scoped variables\r\n    // possibly declared in its initializer, and break context.\r\n    var currentFunction = this.currentFunction;\r\n    var label = currentFunction.enterBreakContext();\r\n    var parentFlow = currentFunction.flow;\r\n    var flow = parentFlow.fork();\r\n    currentFunction.flow = flow;\r\n    var breakLabel = flow.breakLabel = \"break|\" + label;\r\n    flow.breakLabel = breakLabel;\r\n    var continueLabel = \"continue|\" + label;\r\n    flow.continueLabel = continueLabel;\r\n    var repeatLabel = \"repeat|\" + label;\r\n\r\n    // Compile in correct order\r\n    var module = this.module;\r\n    var initExpr = statement.initializer\r\n      ? this.compileStatement(<Statement>statement.initializer)\r\n      : 0;\r\n    var condExpr: ExpressionRef = 0;\r\n    var alwaysTrue = false;\r\n    if (statement.condition) {\r\n      condExpr = this.makeIsTrueish(\r\n        this.compileExpressionRetainType(<Expression>statement.condition, Type.bool, WrapMode.NONE),\r\n        this.currentType\r\n      );\r\n      // check if the condition is always true\r\n      let condPre = module.precomputeExpression(condExpr);\r\n      if (getExpressionId(condPre) == ExpressionId.Const) {\r\n        assert(getExpressionType(condPre) == NativeType.I32);\r\n        if (getConstValueI32(condPre) != 0) alwaysTrue = true;\r\n        // TODO: could skip compilation if the condition is always false here, but beware that the\r\n        // initializer could still declare new 'var's that are used later on.\r\n      }\r\n      // recompile to original\r\n      condExpr = this.makeIsTrueish(\r\n        this.compileExpressionRetainType(<Expression>statement.condition, Type.bool, WrapMode.NONE),\r\n        this.currentType\r\n      );\r\n    } else {\r\n      // omitted condition is always true\r\n      condExpr = module.createI32(1);\r\n      alwaysTrue = true;\r\n    }\r\n    var incrExpr = statement.incrementor\r\n      ? this.compileExpression(<Expression>statement.incrementor, Type.void, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n      : 0;\r\n    var bodyStatement = statement.statement;\r\n    var bodyExpr = bodyStatement.kind == NodeKind.BLOCK && (<BlockStatement>bodyStatement).statements.length == 1\r\n      ? this.compileStatement((<BlockStatement>bodyStatement).statements[0])\r\n      : this.compileStatement(bodyStatement);\r\n\r\n    // Switch back to the parent flow\r\n    currentFunction.flow = flow.free();\r\n    currentFunction.leaveBreakContext();\r\n    var usesContinue = flow.isAny(FlowFlags.CONTINUES | FlowFlags.CONDITIONALLY_CONTINUES);\r\n    flow.unset(\r\n      FlowFlags.BREAKS |\r\n      FlowFlags.CONDITIONALLY_BREAKS |\r\n      FlowFlags.CONTINUES |\r\n      FlowFlags.CONDITIONALLY_CONTINUES\r\n    );\r\n    if (alwaysTrue) parentFlow.inherit(flow);\r\n    else parentFlow.inheritConditional(flow);\r\n\r\n    var breakBlock = new Array<ExpressionRef>(); // outer 'break' block\r\n    if (initExpr) breakBlock.push(initExpr);\r\n\r\n    var repeatBlock = new Array<ExpressionRef>(); // block repeating the loop\r\n    if (usesContinue) {\r\n      repeatBlock.push(\r\n        module.createBlock(continueLabel, [ // inner 'continue' block\r\n          module.createBreak(breakLabel, module.createUnary(UnaryOp.EqzI32, condExpr)),\r\n          bodyExpr\r\n        ], NativeType.None)\r\n      );\r\n    } else { // can omit the 'continue' block\r\n      repeatBlock.push(\r\n        module.createBreak(breakLabel, module.createUnary(UnaryOp.EqzI32, condExpr))\r\n      );\r\n      repeatBlock.push(bodyExpr);\r\n    }\r\n    if (incrExpr) repeatBlock.push(incrExpr);\r\n    repeatBlock.push(\r\n      module.createBreak(repeatLabel)\r\n    );\r\n\r\n    breakBlock.push(\r\n      module.createLoop(repeatLabel, module.createBlock(null, repeatBlock, NativeType.None))\r\n    );\r\n\r\n    return module.createBlock(breakLabel, breakBlock);\r\n  }\r\n\r\n  compileIfStatement(statement: IfStatement): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n    var ifTrue = statement.ifTrue;\r\n    var ifFalse = statement.ifFalse;\r\n\r\n    // The condition doesn't initiate a branch yet\r\n    var condExpr = this.makeIsTrueish(\r\n      this.compileExpressionRetainType(statement.condition, Type.bool, WrapMode.NONE),\r\n      this.currentType\r\n    );\r\n\r\n    if (\r\n      !this.options.noTreeShaking ||\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT)\r\n    ) {\r\n      // Try to eliminate unnecesssary branches if the condition is constant\r\n      let condExprPrecomp = module.precomputeExpression(condExpr);\r\n      if (\r\n        getExpressionId(condExprPrecomp) == ExpressionId.Const &&\r\n        getExpressionType(condExprPrecomp) == NativeType.I32\r\n      ) {\r\n        return getConstValueI32(condExprPrecomp)\r\n          ? this.compileStatement(ifTrue)\r\n          : ifFalse\r\n            ? this.compileStatement(ifFalse)\r\n            : module.createNop();\r\n\r\n      // Otherwise recompile to the original and let the optimizer decide\r\n      } else /* if (condExpr != condExprPrecomp) <- not guaranteed */ {\r\n        condExpr = this.makeIsTrueish(\r\n          this.compileExpressionRetainType(statement.condition, Type.bool, WrapMode.NONE),\r\n          this.currentType\r\n        );\r\n      }\r\n    }\r\n\r\n    // Each arm initiates a branch\r\n    var parentFlow = currentFunction.flow;\r\n    var ifTrueFlow = parentFlow.fork();\r\n    currentFunction.flow = ifTrueFlow;\r\n    var ifTrueExpr = this.compileStatement(ifTrue);\r\n    currentFunction.flow = ifTrueFlow.free();\r\n\r\n    var ifFalseExpr: ExpressionRef = 0;\r\n    if (ifFalse) {\r\n      let ifFalseFlow = parentFlow.fork();\r\n      currentFunction.flow = ifFalseFlow;\r\n      ifFalseExpr = this.compileStatement(ifFalse);\r\n      currentFunction.flow = ifFalseFlow.free();\r\n      parentFlow.inheritMutual(ifTrueFlow, ifFalseFlow);\r\n    } else {\r\n      parentFlow.inheritConditional(ifTrueFlow);\r\n    }\r\n    return module.createIf(condExpr, ifTrueExpr, ifFalseExpr);\r\n  }\r\n\r\n  compileReturnStatement(statement: ReturnStatement): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n    var expr: ExpressionRef = 0;\r\n    var flow = currentFunction.flow;\r\n\r\n    // Remember that this flow returns\r\n    flow.set(FlowFlags.RETURNS);\r\n\r\n    if (statement.value) {\r\n      let returnType = flow.returnType;\r\n      if (returnType == Type.void) {\r\n        this.compileExpressionRetainType(statement.value, returnType, WrapMode.NONE);\r\n        this.error(\r\n          DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n          statement.value.range, this.currentType.toString(), returnType.toString()\r\n        );\r\n        this.currentType = Type.void;\r\n        return module.createUnreachable();\r\n      }\r\n      expr = this.compileExpression(\r\n        statement.value,\r\n        returnType,\r\n        ConversionKind.IMPLICIT,\r\n        currentFunction.is(CommonFlags.MODULE_EXPORT)\r\n          ? WrapMode.WRAP\r\n          : WrapMode.NONE\r\n      );\r\n\r\n      // Remember whether returning a properly wrapped value\r\n      if (!flow.canOverflow(expr, returnType)) flow.set(FlowFlags.RETURNS_WRAPPED);\r\n    }\r\n\r\n    // If the last statement anyway, make it the block's return value\r\n    if (isLastStatement(statement)) return expr ? expr : module.createNop();\r\n\r\n    // When inlining, break to the end of the inlined function's block (no need to wrap)\r\n    return flow.is(FlowFlags.INLINE_CONTEXT)\r\n      ? module.createBreak(assert(flow.returnLabel), 0, expr)\r\n      : module.createReturn(expr);\r\n  }\r\n\r\n  compileSwitchStatement(statement: SwitchStatement): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n\r\n    var cases = statement.cases;\r\n    var numCases = cases.length;\r\n    if (!numCases) {\r\n      return this.compileExpression(statement.condition, Type.void, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n    }\r\n\r\n    // Everything within a switch uses the same break context\r\n    var context = currentFunction.enterBreakContext();\r\n    var parentFlow = currentFunction.flow;\r\n\r\n    // introduce a local for evaluating the condition (exactly once)\r\n    var tempLocal = currentFunction.getTempLocal(Type.u32, false);\r\n    var tempLocalIndex = tempLocal.index;\r\n\r\n    // Prepend initializer to inner block. Does not initiate a new branch, yet.\r\n    var breaks = new Array<ExpressionRef>(1 + numCases);\r\n    breaks[0] = module.createSetLocal( // initializer\r\n      tempLocalIndex,\r\n      this.compileExpression(statement.condition, Type.u32, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n    );\r\n\r\n    // make one br_if per (possibly dynamic) labeled case (binaryen optimizes to br_table where possible)\r\n    var breakIndex = 1;\r\n    var defaultIndex = -1;\r\n    for (let i = 0; i < numCases; ++i) {\r\n      let case_ = cases[i];\r\n      let label = case_.label;\r\n      if (label) {\r\n        breaks[breakIndex++] = module.createBreak(\"case\" + i.toString(10) + \"|\" + context,\r\n          module.createBinary(BinaryOp.EqI32,\r\n            module.createGetLocal(tempLocalIndex, NativeType.I32),\r\n            this.compileExpression(label, Type.u32, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n          )\r\n        );\r\n      } else {\r\n        defaultIndex = i;\r\n      }\r\n    }\r\n\r\n    currentFunction.freeTempLocal(tempLocal);\r\n\r\n    // otherwise br to default respectively out of the switch if there is no default case\r\n    breaks[breakIndex] = module.createBreak((defaultIndex >= 0\r\n        ? \"case\" + defaultIndex.toString(10)\r\n        : \"break\"\r\n      ) + \"|\" + context);\r\n\r\n    // nest blocks in order\r\n    var currentBlock = module.createBlock(\"case0|\" + context, breaks, NativeType.None);\r\n    var alwaysReturns = true;\r\n    var alwaysReturnsWrapped = true;\r\n    var alwaysThrows = true;\r\n    var alwaysAllocates = true;\r\n    for (let i = 0; i < numCases; ++i) {\r\n      let case_ = cases[i];\r\n      let statements = case_.statements;\r\n      let numStatements = statements.length;\r\n\r\n      // Each switch case initiates a new branch\r\n      let flow = parentFlow.fork();\r\n      currentFunction.flow = flow;\r\n      let breakLabel = \"break|\" + context;\r\n      flow.breakLabel = breakLabel;\r\n\r\n      let isLast = i == numCases - 1;\r\n      let nextLabel = isLast ? breakLabel : \"case\" + (i + 1).toString(10) + \"|\" + context;\r\n      let stmts = new Array<ExpressionRef>(1 + numStatements);\r\n      stmts[0] = currentBlock;\r\n      let count = 1;\r\n      let terminated = false;\r\n      for (let j = 0; j < numStatements; ++j) {\r\n        let stmt = this.compileStatement(statements[j]);\r\n        if (getExpressionId(stmt) != ExpressionId.Nop) {\r\n          stmts[count++] = stmt;\r\n          if (flow.isAny(FlowFlags.ANY_TERMINATING)) {\r\n            terminated = true;\r\n            break;\r\n          }\r\n        }\r\n      }\r\n      stmts.length = count;\r\n      if (terminated || isLast) {\r\n        if (!flow.is(FlowFlags.RETURNS)) alwaysReturns = false;\r\n        if (!flow.is(FlowFlags.RETURNS_WRAPPED)) alwaysReturnsWrapped = false;\r\n        if (!flow.is(FlowFlags.THROWS)) alwaysThrows = false;\r\n        if (!flow.is(FlowFlags.ALLOCATES)) alwaysAllocates = false;\r\n      }\r\n\r\n      // Switch back to the parent flow\r\n      flow.unset(\r\n        FlowFlags.BREAKS |\r\n        FlowFlags.CONDITIONALLY_BREAKS\r\n      );\r\n      currentFunction.flow = flow.free();\r\n      currentBlock = module.createBlock(nextLabel, stmts, NativeType.None); // must be a labeled block\r\n    }\r\n    currentFunction.leaveBreakContext();\r\n\r\n    // If the switch has a default (guaranteed to handle any value), propagate common flags\r\n    if (defaultIndex >= 0) {\r\n      if (alwaysReturns) parentFlow.set(FlowFlags.RETURNS);\r\n      if (alwaysReturnsWrapped) parentFlow.set(FlowFlags.RETURNS_WRAPPED);\r\n      if (alwaysThrows) parentFlow.set(FlowFlags.THROWS);\r\n      if (alwaysAllocates) parentFlow.set(FlowFlags.ALLOCATES);\r\n    }\r\n    return currentBlock;\r\n  }\r\n\r\n  compileThrowStatement(statement: ThrowStatement): ExpressionRef {\r\n    var flow = this.currentFunction.flow;\r\n\r\n    // Remember that this branch throws\r\n    flow.set(FlowFlags.THROWS);\r\n\r\n    // FIXME: without try-catch it is safe to assume RETURNS as well for now\r\n    flow.set(FlowFlags.RETURNS);\r\n\r\n    // TODO: requires exception-handling spec.\r\n    return compileAbort(this, null, statement);\r\n  }\r\n\r\n  compileTryStatement(statement: TryStatement): ExpressionRef {\r\n    // TODO\r\n    // can't yet support something like: try { return ... } finally { ... }\r\n    // worthwhile to investigate lowering returns to block results (here)?\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      statement.range\r\n    );\r\n    return this.module.createUnreachable();\r\n  }\r\n\r\n  /**\r\n   * Compiles a variable statement. Returns `0` if an initializer is not\r\n   * necessary.\r\n   */\r\n  compileVariableStatement(statement: VariableStatement, isKnownGlobal: bool = false): ExpressionRef {\r\n    var program = this.program;\r\n    var currentFunction = this.currentFunction;\r\n    var declarations = statement.declarations;\r\n    var numDeclarations = declarations.length;\r\n\r\n    // top-level variables and constants become globals\r\n    if (isKnownGlobal || (\r\n      currentFunction == this.startFunctionInstance &&\r\n      statement.parent && statement.parent.kind == NodeKind.SOURCE\r\n    )) {\r\n      // NOTE that the above condition also covers top-level variables declared with 'let', even\r\n      // though such variables could also become start function locals if, and only if, not used\r\n      // within any function declared in the same source, which is unknown at this point. the only\r\n      // efficient way to deal with this would be to keep track of all occasions it is used and\r\n      // replace these instructions afterwards, dynamically. (TOOD: what about a Binaryen pass?)\r\n      for (let i = 0; i < numDeclarations; ++i) {\r\n        this.compileGlobalDeclaration(declarations[i]);\r\n      }\r\n      return 0;\r\n    }\r\n\r\n    // other variables become locals\r\n    var initializers = new Array<ExpressionRef>();\r\n    var flow = this.currentFunction.flow;\r\n    var resolver = this.resolver;\r\n    for (let i = 0; i < numDeclarations; ++i) {\r\n      let declaration = declarations[i];\r\n      let name = declaration.name.text;\r\n      let type: Type | null = null;\r\n      let initExpr: ExpressionRef = 0;\r\n      if (declaration.type) {\r\n        type = resolver.resolveType( // reports\r\n          declaration.type,\r\n          flow.contextualTypeArguments\r\n        );\r\n        if (!type) continue;\r\n        if (declaration.initializer) {\r\n          initExpr = this.compileExpression( // reports\r\n            declaration.initializer,\r\n            type,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n        }\r\n      } else if (declaration.initializer) { // infer type using void/NONE for proper literal inference\r\n        initExpr = this.compileExpressionRetainType( // reports\r\n          declaration.initializer,\r\n          Type.void,\r\n          WrapMode.NONE\r\n        );\r\n        if (this.currentType == Type.void) {\r\n          this.error(\r\n            DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n            declaration.range, this.currentType.toString(), \"<auto>\"\r\n          );\r\n          continue;\r\n        }\r\n        type = this.currentType;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Type_expected,\r\n          declaration.name.range.atEnd\r\n        );\r\n        continue;\r\n      }\r\n      let isInlined = false;\r\n      if (declaration.is(CommonFlags.CONST)) {\r\n        if (initExpr) {\r\n          initExpr = this.module.precomputeExpression(initExpr);\r\n          if (getExpressionId(initExpr) == ExpressionId.Const) {\r\n            let local = new Local(program, name, -1, type);\r\n            switch (getExpressionType(initExpr)) {\r\n              case NativeType.I32: {\r\n                local = local.withConstantIntegerValue(\r\n                  i64_new(\r\n                    getConstValueI32(initExpr),\r\n                    0\r\n                  )\r\n                );\r\n                break;\r\n              }\r\n              case NativeType.I64: {\r\n                local = local.withConstantIntegerValue(\r\n                  i64_new(\r\n                    getConstValueI64Low(initExpr),\r\n                    getConstValueI64High(initExpr)\r\n                  )\r\n                );\r\n                break;\r\n              }\r\n              case NativeType.F32: {\r\n                local = local.withConstantFloatValue(<f64>getConstValueF32(initExpr));\r\n                break;\r\n              }\r\n              case NativeType.F64: {\r\n                local = local.withConstantFloatValue(getConstValueF64(initExpr));\r\n                break;\r\n              }\r\n              default: {\r\n                assert(false);\r\n                return this.module.createUnreachable();\r\n              }\r\n            }\r\n            // Create a virtual local that doesn't actually exist in WebAssembly\r\n            let scopedLocals = currentFunction.flow.scopedLocals;\r\n            if (!scopedLocals) currentFunction.flow.scopedLocals = scopedLocals = new Map();\r\n            else if (scopedLocals.has(name)) {\r\n              this.error(\r\n                DiagnosticCode.Duplicate_identifier_0,\r\n                declaration.name.range, name\r\n              );\r\n              return this.module.createUnreachable();\r\n            }\r\n            scopedLocals.set(name, local);\r\n            isInlined = true;\r\n          } else {\r\n            this.warning(\r\n              DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n              declaration.range\r\n            );\r\n          }\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._const_declarations_must_be_initialized,\r\n            declaration.range\r\n          );\r\n        }\r\n      }\r\n      if (!isInlined) {\r\n        let local: Local;\r\n        if (\r\n          declaration.isAny(CommonFlags.LET | CommonFlags.CONST) ||\r\n          flow.is(FlowFlags.INLINE_CONTEXT)\r\n        ) { // here: not top-level\r\n          local = flow.addScopedLocal(type, name, false, declaration); // reports\r\n        } else {\r\n          local = currentFunction.addLocal(type, name, declaration); // reports\r\n        }\r\n        if (initExpr) {\r\n          initializers.push(this.compileAssignmentWithValue(declaration.name, initExpr));\r\n          if (local.type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n            flow.setLocalWrapped(local.index, !flow.canOverflow(initExpr, type));\r\n          }\r\n        } else if (local.type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n          flow.setLocalWrapped(local.index, true); // zero\r\n        }\r\n      }\r\n    }\r\n    return initializers.length   // we can unwrap these here because the\r\n      ? initializers.length == 1 // source didn't tell us exactly what to do\r\n        ? initializers[0]\r\n        : this.module.createBlock(null, initializers, NativeType.None)\r\n      : 0;\r\n  }\r\n\r\n  compileVoidStatement(statement: VoidStatement): ExpressionRef {\r\n    return this.compileExpression(statement.expression, Type.void, ConversionKind.EXPLICIT, WrapMode.NONE);\r\n  }\r\n\r\n  compileWhileStatement(statement: WhileStatement): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    // The condition does not yet initialize a branch\r\n    var condExpr = this.makeIsTrueish(\r\n      this.compileExpressionRetainType(statement.condition, Type.bool, WrapMode.NONE),\r\n      this.currentType\r\n    );\r\n\r\n    if (\r\n      !this.options.noTreeShaking ||\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT)\r\n    ) {\r\n      // Try to eliminate unnecesssary loops if the condition is constant\r\n      let condExprPrecomp = module.precomputeExpression(condExpr);\r\n      if (\r\n        getExpressionId(condExprPrecomp) == ExpressionId.Const &&\r\n        getExpressionType(condExprPrecomp) == NativeType.I32\r\n      ) {\r\n        if (!getConstValueI32(condExprPrecomp)) return module.createNop();\r\n\r\n      // Otherwise recompile to the original and let the optimizer decide\r\n      } else /* if (condExpr != condExprPrecomp) <- not guaranteed */ {\r\n        condExpr = this.makeIsTrueish(\r\n          this.compileExpressionRetainType(statement.condition, Type.bool, WrapMode.NONE),\r\n          this.currentType\r\n        );\r\n      }\r\n    }\r\n\r\n    // Statements initiate a new branch with its own break context\r\n    var currentFunction = this.currentFunction;\r\n    var label = currentFunction.enterBreakContext();\r\n    var parentFlow = currentFunction.flow;\r\n    var flow = parentFlow.fork();\r\n    currentFunction.flow = flow;\r\n    var breakLabel = \"break|\" + label;\r\n    flow.breakLabel = breakLabel;\r\n    var continueLabel = \"continue|\" + label;\r\n    flow.continueLabel = continueLabel;\r\n\r\n    var body = this.compileStatement(statement.statement);\r\n    var alwaysTrue = false; // TODO\r\n    var terminated = flow.isAny(FlowFlags.ANY_TERMINATING);\r\n\r\n    // Switch back to the parent flow\r\n    currentFunction.flow = flow.free();\r\n    currentFunction.leaveBreakContext();\r\n    flow.unset(\r\n      FlowFlags.BREAKS |\r\n      FlowFlags.CONDITIONALLY_BREAKS |\r\n      FlowFlags.CONTINUES |\r\n      FlowFlags.CONDITIONALLY_CONTINUES\r\n    );\r\n    if (alwaysTrue) parentFlow.inherit(flow);\r\n    else parentFlow.inheritConditional(flow);\r\n\r\n    return module.createBlock(breakLabel, [\r\n      module.createLoop(continueLabel,\r\n        module.createIf(condExpr,\r\n          terminated\r\n            ? body // skip trailing continue if unnecessary\r\n            : module.createBlock(null, [\r\n                body,\r\n                module.createBreak(continueLabel)\r\n              ], NativeType.None)\r\n        )\r\n      )\r\n    ]);\r\n  }\r\n\r\n  // expressions\r\n\r\n  /**\r\n   * Compiles the value of an inlined constant element.\r\n   * @param retainType If true, the annotated type of the constant is retained. Otherwise, the value\r\n   *  is precomputed according to context.\r\n   */\r\n  compileInlineConstant(\r\n    element: VariableLikeElement,\r\n    contextualType: Type,\r\n    retainType: bool\r\n  ): ExpressionRef {\r\n    assert(element.is(CommonFlags.INLINED));\r\n    var type = element.type;\r\n    switch (\r\n      !retainType &&\r\n      type.is(TypeFlags.INTEGER) &&\r\n      contextualType.is(TypeFlags.INTEGER) &&\r\n      type.size < contextualType.size\r\n        ? (this.currentType = contextualType).kind // essentially precomputes a (sign-)extension\r\n        : (this.currentType = type).kind\r\n    ) {\r\n      case TypeKind.I8:\r\n      case TypeKind.I16: {\r\n        let shift = type.computeSmallIntegerShift(Type.i32);\r\n        return this.module.createI32(\r\n          element.constantValueKind == ConstantValueKind.INTEGER\r\n            ? i64_low(element.constantIntegerValue) << shift >> shift\r\n            : 0\r\n        ); // recognized by canOverflow\r\n      }\r\n      case TypeKind.U8:\r\n      case TypeKind.U16:\r\n      case TypeKind.BOOL: {\r\n        let mask = element.type.computeSmallIntegerMask(Type.i32);\r\n        return this.module.createI32(\r\n          element.constantValueKind == ConstantValueKind.INTEGER\r\n            ? i64_low(element.constantIntegerValue) & mask\r\n            : 0\r\n        ); // recognized by canOverflow\r\n      }\r\n      case TypeKind.I32:\r\n      case TypeKind.U32: {\r\n        return this.module.createI32(\r\n          element.constantValueKind == ConstantValueKind.INTEGER\r\n            ? i64_low(element.constantIntegerValue)\r\n            : 0\r\n        );\r\n      }\r\n      case TypeKind.ISIZE:\r\n      case TypeKind.USIZE: {\r\n        if (!element.program.options.isWasm64) {\r\n          return this.module.createI32(\r\n            element.constantValueKind == ConstantValueKind.INTEGER\r\n              ? i64_low(element.constantIntegerValue)\r\n              : 0\r\n          );\r\n        }\r\n        // fall-through\r\n      }\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: {\r\n        return element.constantValueKind == ConstantValueKind.INTEGER\r\n          ? this.module.createI64(\r\n              i64_low(element.constantIntegerValue),\r\n              i64_high(element.constantIntegerValue)\r\n            )\r\n          : this.module.createI64(0);\r\n      }\r\n      case TypeKind.F64: {\r\n        // monkey-patch for converting built-in floats to f32 implicitly\r\n        if (!(element.hasDecorator(DecoratorFlags.BUILTIN) && contextualType == Type.f32)) {\r\n          return this.module.createF64((<VariableLikeElement>element).constantFloatValue);\r\n        }\r\n        // otherwise fall-through: basically precomputes f32.demote/f64 of NaN / Infinity\r\n        this.currentType = Type.f32;\r\n      }\r\n      case TypeKind.F32: {\r\n        return this.module.createF32((<VariableLikeElement>element).constantFloatValue);\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return this.module.createUnreachable();\r\n      }\r\n    }\r\n  }\r\n\r\n  compileExpression(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    conversionKind: ConversionKind,\r\n    wrapMode: WrapMode\r\n  ): ExpressionRef {\r\n    this.currentType = contextualType;\r\n\r\n    var expr: ExpressionRef;\r\n    switch (expression.kind) {\r\n      case NodeKind.ASSERTION: {\r\n        expr = this.compileAssertionExpression(<AssertionExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.BINARY: {\r\n        expr = this.compileBinaryExpression(<BinaryExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.CALL: {\r\n        expr = this.compileCallExpression(<CallExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.COMMA: {\r\n        expr = this.compileCommaExpression(<CommaExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.ELEMENTACCESS: {\r\n        expr = this.compileElementAccessExpression(<ElementAccessExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.FUNCTION: {\r\n        expr = this.compileFunctionExpression(<FunctionExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.IDENTIFIER:\r\n      case NodeKind.FALSE:\r\n      case NodeKind.NULL:\r\n      case NodeKind.THIS:\r\n      case NodeKind.SUPER:\r\n      case NodeKind.TRUE: {\r\n        expr = this.compileIdentifierExpression(\r\n          <IdentifierExpression>expression,\r\n          contextualType,\r\n          conversionKind == ConversionKind.NONE // retain type of inlined constants\r\n        );\r\n        break;\r\n      }\r\n      case NodeKind.INSTANCEOF: {\r\n        expr = this.compileInstanceOfExpression(<InstanceOfExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.LITERAL: {\r\n        expr = this.compileLiteralExpression(<LiteralExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.NEW: {\r\n        expr = this.compileNewExpression(<NewExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.PARENTHESIZED: {\r\n        expr = this.compileParenthesizedExpression(<ParenthesizedExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.PROPERTYACCESS: {\r\n        expr = this.compilePropertyAccessExpression(\r\n          <PropertyAccessExpression>expression,\r\n          contextualType,\r\n          conversionKind == ConversionKind.NONE // retain type of inlined constants\r\n        );\r\n        break;\r\n      }\r\n      case NodeKind.TERNARY: {\r\n        expr = this.compileTernaryExpression(<TernaryExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.UNARYPOSTFIX: {\r\n        expr = this.compileUnaryPostfixExpression(<UnaryPostfixExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      case NodeKind.UNARYPREFIX: {\r\n        expr = this.compileUnaryPrefixExpression(<UnaryPrefixExpression>expression, contextualType);\r\n        break;\r\n      }\r\n      default: {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        expr = this.module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    var currentType = this.currentType;\r\n    if (conversionKind != ConversionKind.NONE && currentType != contextualType) {\r\n      expr = this.convertExpression(expr, currentType, contextualType, conversionKind, wrapMode, expression);\r\n      this.currentType = contextualType;\r\n    } else if (wrapMode == WrapMode.WRAP) {\r\n      expr = this.ensureSmallIntegerWrap(expr, currentType);\r\n    }\r\n\r\n    if (this.options.sourceMap) this.addDebugLocation(expr, expression.range);\r\n    return expr;\r\n  }\r\n\r\n  compileExpressionRetainType(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    wrapMode: WrapMode\r\n  ): ExpressionRef {\r\n    return this.compileExpression(\r\n      expression,\r\n      contextualType == Type.void\r\n        ? Type.i32\r\n        : contextualType,\r\n      ConversionKind.NONE,\r\n      wrapMode\r\n    );\r\n  }\r\n\r\n  precomputeExpression(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    conversionKind: ConversionKind,\r\n    wrapMode: WrapMode\r\n  ): ExpressionRef {\r\n    return this.module.precomputeExpression(\r\n      this.compileExpression(expression, contextualType, conversionKind, wrapMode)\r\n    );\r\n  }\r\n\r\n  convertExpression(\r\n    expr: ExpressionRef,\r\n    fromType: Type,\r\n    toType: Type,\r\n    conversionKind: ConversionKind,\r\n    wrapMode: WrapMode,\r\n    reportNode: Node\r\n  ): ExpressionRef {\r\n    assert(conversionKind != ConversionKind.NONE);\r\n    var module = this.module;\r\n\r\n    // void to any\r\n    if (fromType.kind == TypeKind.VOID) {\r\n      assert(toType.kind != TypeKind.VOID); // convertExpression should not be called with void -> void\r\n      this.error(\r\n        DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n        reportNode.range, fromType.toString(), toType.toString()\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n\r\n    // any to void\r\n    if (toType.kind == TypeKind.VOID) return module.createDrop(expr);\r\n\r\n    if (!fromType.isAssignableTo(toType)) {\r\n      if (conversionKind == ConversionKind.IMPLICIT) {\r\n        this.error(\r\n          DiagnosticCode.Conversion_from_type_0_to_1_requires_an_explicit_cast,\r\n          reportNode.range, fromType.toString(), toType.toString()\r\n        ); // recoverable\r\n      }\r\n    }\r\n\r\n    if (fromType.is(TypeFlags.FLOAT)) {\r\n\r\n      // float to float\r\n      if (toType.is(TypeFlags.FLOAT)) {\r\n        if (fromType.kind == TypeKind.F32) {\r\n\r\n          // f32 to f64\r\n          if (toType.kind == TypeKind.F64) {\r\n            expr = module.createUnary(UnaryOp.PromoteF32, expr);\r\n          }\r\n\r\n          // otherwise f32 to f32\r\n\r\n        // f64 to f32\r\n        } else if (toType.kind == TypeKind.F32) {\r\n          expr = module.createUnary(UnaryOp.DemoteF64, expr);\r\n        }\r\n\r\n        // otherwise f64 to f64\r\n\r\n      // float to int\r\n      } else if (toType.is(TypeFlags.INTEGER)) {\r\n\r\n        // f32 to int\r\n        if (fromType.kind == TypeKind.F32) {\r\n          if (toType.is(TypeFlags.SIGNED)) {\r\n            if (toType.is(TypeFlags.LONG)) {\r\n              expr = module.createUnary(UnaryOp.TruncF32ToI64, expr);\r\n            } else {\r\n              expr = module.createUnary(UnaryOp.TruncF32ToI32, expr);\r\n            }\r\n          } else {\r\n            if (toType.is(TypeFlags.LONG)) {\r\n              expr = module.createUnary(UnaryOp.TruncF32ToU64, expr);\r\n            } else {\r\n              expr = module.createUnary(UnaryOp.TruncF32ToU32, expr);\r\n            }\r\n          }\r\n\r\n        // f64 to int\r\n        } else {\r\n          if (toType.is(TypeFlags.SIGNED)) {\r\n            if (toType.is(TypeFlags.LONG)) {\r\n              expr = module.createUnary(UnaryOp.TruncF64ToI64, expr);\r\n            } else {\r\n              expr = module.createUnary(UnaryOp.TruncF64ToI32, expr);\r\n            }\r\n          } else {\r\n            if (toType.is(TypeFlags.LONG)) {\r\n              expr = module.createUnary(UnaryOp.TruncF64ToU64, expr);\r\n            } else {\r\n              expr = module.createUnary(UnaryOp.TruncF64ToU32, expr);\r\n            }\r\n          }\r\n        }\r\n\r\n      // float to void\r\n      } else {\r\n        assert(toType.flags == TypeFlags.NONE, \"void type expected\");\r\n        expr = module.createDrop(expr);\r\n      }\r\n\r\n    // int to float\r\n    } else if (fromType.is(TypeFlags.INTEGER) && toType.is(TypeFlags.FLOAT)) {\r\n\r\n      // int to f32\r\n      if (toType.kind == TypeKind.F32) {\r\n        if (fromType.is(TypeFlags.LONG)) {\r\n          expr = module.createUnary(\r\n            fromType.is(TypeFlags.SIGNED)\r\n              ? UnaryOp.ConvertI64ToF32\r\n              : UnaryOp.ConvertU64ToF32,\r\n            expr\r\n          );\r\n        } else {\r\n          expr = module.createUnary(\r\n            fromType.is(TypeFlags.SIGNED)\r\n              ? UnaryOp.ConvertI32ToF32\r\n              : UnaryOp.ConvertU32ToF32,\r\n            expr\r\n          );\r\n        }\r\n\r\n      // int to f64\r\n      } else {\r\n        if (fromType.is(TypeFlags.LONG)) {\r\n          expr = module.createUnary(\r\n            fromType.is(TypeFlags.SIGNED)\r\n              ? UnaryOp.ConvertI64ToF64\r\n              : UnaryOp.ConvertU64ToF64,\r\n            expr\r\n          );\r\n        } else {\r\n          expr = module.createUnary(\r\n            fromType.is(TypeFlags.SIGNED)\r\n              ? UnaryOp.ConvertI32ToF64\r\n              : UnaryOp.ConvertU32ToF64,\r\n            expr\r\n          );\r\n        }\r\n      }\r\n\r\n    // int to int\r\n    } else {\r\n      // i64 to ...\r\n      if (fromType.is(TypeFlags.LONG)) {\r\n\r\n        // i64 to i32 or smaller\r\n        if (!toType.is(TypeFlags.LONG)) {\r\n          expr = module.createUnary(UnaryOp.WrapI64, expr); // discards upper bits\r\n        }\r\n\r\n      // i32 or smaller to i64\r\n      } else if (toType.is(TypeFlags.LONG)) {\r\n        expr = module.createUnary(\r\n          fromType.is(TypeFlags.SIGNED) ? UnaryOp.ExtendI32 : UnaryOp.ExtendU32,\r\n          this.ensureSmallIntegerWrap(expr, fromType) // must clear garbage bits\r\n        );\r\n        wrapMode = WrapMode.NONE;\r\n\r\n      // i32 to i32\r\n      } else {\r\n        // small i32 to ...\r\n        if (fromType.is(TypeFlags.SHORT)) {\r\n          // small i32 to larger i32\r\n          if (fromType.size < toType.size) {\r\n            expr = this.ensureSmallIntegerWrap(expr, fromType); // must clear garbage bits\r\n            wrapMode = WrapMode.NONE;\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    this.currentType = toType;\r\n    return wrapMode == WrapMode.WRAP\r\n      ? this.ensureSmallIntegerWrap(expr, toType)\r\n      : expr;\r\n  }\r\n\r\n  compileAssertionExpression(expression: AssertionExpression, contextualType: Type): ExpressionRef {\r\n    var toType = this.resolver.resolveType( // reports\r\n      expression.toType,\r\n      this.currentFunction.flow.contextualTypeArguments\r\n    );\r\n    if (!toType) return this.module.createUnreachable();\r\n    return this.compileExpression(expression.expression, toType, ConversionKind.EXPLICIT, WrapMode.NONE);\r\n  }\r\n\r\n  private f32ModInstance: Function | null = null;\r\n  private f64ModInstance: Function | null = null;\r\n  private f32PowInstance: Function | null = null;\r\n  private f64PowInstance: Function | null = null;\r\n\r\n  compileBinaryExpression(\r\n    expression: BinaryExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var left = expression.left;\r\n    var right = expression.right;\r\n\r\n    var leftExpr: ExpressionRef;\r\n    var leftType: Type;\r\n    var rightExpr: ExpressionRef;\r\n    var rightType: Type;\r\n    var commonType: Type | null;\r\n\r\n    var expr: ExpressionRef;\r\n    var compound = false;\r\n\r\n    var operator = expression.operator;\r\n    switch (operator) {\r\n      case Token.LESSTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.LT);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, \"<\", leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.LtI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.LtI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.LtI64\r\n                : BinaryOp.LtI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.LtU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.LtU64\r\n                : BinaryOp.LtU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.LtU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.LtF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.LtF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.GREATERTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.GT);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, \">\", leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.GtI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.GtI64\r\n                : BinaryOp.GtI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.GtI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.GtU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.GtU64\r\n                : BinaryOp.GtU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.GtU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.GtF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.GtF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.LESSTHAN_EQUALS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.LE);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, \"<=\", leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.LeI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.LeI64\r\n                : BinaryOp.LeI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.LeI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.LeU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.LeU64\r\n                : BinaryOp.LeU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.LeU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.LeF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.LeF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.GREATERTHAN_EQUALS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.GE);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, \">=\", leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.GeI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.GeI64\r\n                : BinaryOp.GeI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.GeI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.GeU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.GeU64\r\n                : BinaryOp.GeU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.GeU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.GeF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.GeF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n\r\n      case Token.EQUALS_EQUALS_EQUALS:\r\n      case Token.EQUALS_EQUALS: {\r\n\r\n        // NOTE that this favors correctness, in terms of emitting a binary expression, over\r\n        // checking for a possible use of unary EQZ. while the most classic of all optimizations,\r\n        // that's not what the source told us to do. for reference, `!left` emits unary EQZ.\r\n\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n         // check operator overload\r\n        if (operator == Token.EQUALS_EQUALS && this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.EQ);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          // still allow '==' with references\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, operatorTokenToString(expression.operator), leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.EqI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.EqI64\r\n                : BinaryOp.EqI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.EqI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.EqF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.EqF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.EXCLAMATION_EQUALS_EQUALS:\r\n      case Token.EXCLAMATION_EQUALS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n         // check operator overload\r\n        if (operator == Token.EXCLAMATION_EQUALS && this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.NE);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          // still allow '!=' with references\r\n        }\r\n\r\n        rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            leftType,\r\n            leftType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            left\r\n          );\r\n          rightExpr = this.convertExpression(\r\n            rightExpr,\r\n            rightType,\r\n            rightType = commonType,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP,\r\n            right\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n            expression.range, operatorTokenToString(expression.operator), leftType.toString(), rightType.toString()\r\n          );\r\n          this.currentType = contextualType;\r\n          return module.createUnreachable();\r\n        }\r\n        switch (commonType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.NeI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.NeI64\r\n                : BinaryOp.NeI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.NeI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.NeF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.NeF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.EQUALS: {\r\n        return this.compileAssignment(left, right, contextualType);\r\n      }\r\n      case Token.PLUS_EQUALS: compound = true;\r\n      case Token.PLUS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.ADD);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"+\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:   // addition might overflow\r\n          case TypeKind.I16:  // ^\r\n          case TypeKind.U8:   // ^\r\n          case TypeKind.U16:  // ^\r\n          case TypeKind.BOOL: // ^\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.AddI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.AddI64\r\n                : BinaryOp.AddI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.AddI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.AddF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.AddF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.MINUS_EQUALS: compound = true;\r\n      case Token.MINUS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.SUB);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"-\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:   // subtraction might overflow\r\n          case TypeKind.I16:  // ^\r\n          case TypeKind.U8:   // ^\r\n          case TypeKind.U16:  // ^\r\n          case TypeKind.BOOL: // ^\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.SubI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.SubI64\r\n                : BinaryOp.SubI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.SubI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.SubF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.SubF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.ASTERISK_EQUALS: compound = true;\r\n      case Token.ASTERISK: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.MUL);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType);\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"*\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL:\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.MulI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.MulI64\r\n                : BinaryOp.MulI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.MulI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.MulF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.MulF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.ASTERISK_ASTERISK_EQUALS: compound = true;\r\n      case Token.ASTERISK_ASTERISK: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.POW);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        let instance: Function | null;\r\n\r\n        // Mathf.pow if lhs is f32 (result is f32)\r\n        if (this.currentType.kind == TypeKind.F32) {\r\n          rightExpr = this.compileExpression(right, Type.f32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (!(instance = this.f32PowInstance)) {\r\n            let namespace = this.program.elementsLookup.get(\"Mathf\");\r\n            if (!namespace) {\r\n              this.error(\r\n                DiagnosticCode.Cannot_find_name_0,\r\n                expression.range, \"Mathf\"\r\n              );\r\n              expr = module.createUnreachable();\r\n              break;\r\n            }\r\n            let prototype = namespace.members ? namespace.members.get(\"pow\") : null;\r\n            if (!prototype) {\r\n              this.error(\r\n                DiagnosticCode.Cannot_find_name_0,\r\n                expression.range, \"Mathf.pow\"\r\n              );\r\n              expr = module.createUnreachable();\r\n              break;\r\n            }\r\n            assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n            this.f32PowInstance = instance = this.resolver.resolveFunction(<FunctionPrototype>prototype, null);\r\n          }\r\n\r\n        // Math.pow otherwise (result is f64)\r\n        // TODO: should the result be converted back?\r\n        } else {\r\n          leftExpr = this.convertExpression(\r\n            leftExpr,\r\n            this.currentType,\r\n            Type.f64,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE,\r\n            left\r\n          );\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            Type.f64,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n          rightType = this.currentType;\r\n          if (!(instance = this.f64PowInstance)) {\r\n            let namespace = this.program.elementsLookup.get(\"Math\");\r\n            if (!namespace) {\r\n              this.error(\r\n                DiagnosticCode.Cannot_find_name_0,\r\n                expression.range, \"Math\"\r\n              );\r\n              expr = module.createUnreachable();\r\n              break;\r\n            }\r\n            let prototype = namespace.members ? namespace.members.get(\"pow\") : null;\r\n            if (!prototype) {\r\n              this.error(\r\n                DiagnosticCode.Cannot_find_name_0,\r\n                expression.range, \"Math.pow\"\r\n              );\r\n              expr = module.createUnreachable();\r\n              break;\r\n            }\r\n            assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n            this.f64PowInstance = instance = this.resolver.resolveFunction(<FunctionPrototype>prototype, null);\r\n          }\r\n        }\r\n        if (!(instance && this.compileFunction(instance))) {\r\n          expr = module.createUnreachable();\r\n        } else {\r\n          expr = this.makeCallDirect(instance, [ leftExpr, rightExpr ]);\r\n        }\r\n        break;\r\n      }\r\n      case Token.SLASH_EQUALS: compound = true;\r\n      case Token.SLASH: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.DIV);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType);\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.WRAP, // !\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.WRAP, // !\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"/\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:  // signed div on signed small integers might overflow, e.g. -128/-1\r\n          case TypeKind.I16: // ^\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.DivI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.DivI64\r\n                : BinaryOp.DivI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.DivI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.DivU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.DivU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.DivU64\r\n                : BinaryOp.DivU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.DivU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.DivF32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.DivF64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.PERCENT_EQUALS: compound = true;\r\n      case Token.PERCENT: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.REM);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType);\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.WRAP, // !\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.WRAP, // !\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"%\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16: {\r\n            expr = module.createBinary(BinaryOp.RemI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.RemI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.RemI64\r\n                : BinaryOp.RemI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.RemI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.RemU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.RemU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.RemU64\r\n                : BinaryOp.RemU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.RemU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            let instance = this.f32ModInstance;\r\n            if (!instance) {\r\n              let namespace = this.program.elementsLookup.get(\"Mathf\");\r\n              if (!namespace) {\r\n                this.error(\r\n                  DiagnosticCode.Cannot_find_name_0,\r\n                  expression.range, \"Mathf\"\r\n                );\r\n                expr = module.createUnreachable();\r\n                break;\r\n              }\r\n              let prototype = namespace.members ? namespace.members.get(\"mod\") : null;\r\n              if (!prototype) {\r\n                this.error(\r\n                  DiagnosticCode.Cannot_find_name_0,\r\n                  expression.range, \"Mathf.mod\"\r\n                );\r\n                expr = module.createUnreachable();\r\n                break;\r\n              }\r\n              assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n              this.f32ModInstance = instance = this.resolver.resolveFunction(<FunctionPrototype>prototype, null);\r\n            }\r\n            if (!(instance && this.compileFunction(instance))) {\r\n              expr = module.createUnreachable();\r\n            } else {\r\n              expr = this.makeCallDirect(instance, [ leftExpr, rightExpr ]);\r\n            }\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            let instance = this.f64ModInstance;\r\n            if (!instance) {\r\n              let namespace = this.program.elementsLookup.get(\"Math\");\r\n              if (!namespace) {\r\n                this.error(\r\n                  DiagnosticCode.Cannot_find_name_0,\r\n                  expression.range, \"Math\"\r\n                );\r\n                expr = module.createUnreachable();\r\n                break;\r\n              }\r\n              let prototype = namespace.members ? namespace.members.get(\"mod\") : null;\r\n              if (!prototype) {\r\n                this.error(\r\n                  DiagnosticCode.Cannot_find_name_0,\r\n                  expression.range, \"Math.mod\"\r\n                );\r\n                expr = module.createUnreachable();\r\n                break;\r\n              }\r\n              assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n              this.f64ModInstance = instance = this.resolver.resolveFunction(<FunctionPrototype>prototype, null);\r\n            }\r\n            if (!(instance && this.compileFunction(instance))) {\r\n              expr = module.createUnreachable();\r\n            } else {\r\n              expr = this.makeCallDirect(instance, [ leftExpr, rightExpr ]);\r\n            }\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.LESSTHAN_LESSTHAN_EQUALS: compound = true;\r\n      case Token.LESSTHAN_LESSTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_SHL);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL:\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.ShlI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.ShlI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.ShlI64\r\n                : BinaryOp.ShlI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.GREATERTHAN_GREATERTHAN_EQUALS: compound = true;\r\n      case Token.GREATERTHAN_GREATERTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_SHR);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType); // must clear garbage bits\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n        rightType = this.currentType;\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16: {\r\n            expr = module.createBinary(BinaryOp.ShrI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I32: {\r\n            expr = module.createBinary(BinaryOp.ShrI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64: {\r\n            expr = module.createBinary(BinaryOp.ShrI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.ShrI64\r\n                : BinaryOp.ShrI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.ShrU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.ShrU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.ShrU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.ShrU64\r\n                : BinaryOp.ShrU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS: compound = true;\r\n      case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_SHR_U);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        leftExpr = this.ensureSmallIntegerWrap(leftExpr, leftType); // must clear garbage bits\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: { // assumes that unsigned shr on unsigned small integers does not overflow\r\n            expr = module.createBinary(BinaryOp.ShrU32, leftExpr, rightExpr);\r\n          }\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.ShrU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.ShrU64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.ShrU64\r\n                : BinaryOp.ShrU32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.AMPERSAND_EQUALS: compound = true;\r\n      case Token.AMPERSAND: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overloadd\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_AND);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"&\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.AndI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.AndI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.AndI64\r\n                : BinaryOp.AndI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.BAR_EQUALS: compound = true;\r\n      case Token.BAR: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_OR);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"|\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.OrI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.OrI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.OrI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.OrI64\r\n                : BinaryOp.OrI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.CARET_EQUALS: compound = true;\r\n      case Token.CARET: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType.intType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = leftType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_XOR);\r\n            if (overload) {\r\n              expr = this.compileBinaryOverload(overload, left, leftExpr, right, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n        } else {\r\n          rightExpr = this.compileExpressionRetainType(right, leftType, WrapMode.NONE);\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(\r\n              leftExpr,\r\n              leftType,\r\n              leftType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              left\r\n            );\r\n            rightExpr = this.convertExpression(\r\n              rightExpr,\r\n              rightType,\r\n              rightType = commonType,\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE,\r\n              right\r\n            );\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,\r\n              expression.range, \"^\", leftType.toString(), rightType.toString()\r\n            );\r\n            this.currentType = contextualType;\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.XorI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I32:\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.XorI32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.XorI64, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.XorI64\r\n                : BinaryOp.XorI32,\r\n              leftExpr,\r\n              rightExpr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32:\r\n          case TypeKind.F64: {\r\n            this.error(\r\n              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,\r\n              expression.range, operatorTokenToString(expression.operator), this.currentType.toString()\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n\r\n      // logical (no overloading)\r\n\r\n      case Token.AMPERSAND_AMPERSAND: { // left && right\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n\r\n        // simplify if cloning left without side effects is possible\r\n        if (expr = module.cloneExpression(leftExpr, true, 0)) {\r\n          this.makeIsTrueish(leftExpr, this.currentType);\r\n          expr = module.createIf(\r\n            this.makeIsTrueish(leftExpr, this.currentType),\r\n            rightExpr,\r\n            expr\r\n          );\r\n\r\n        // if not possible, tee left to a temp. local\r\n        } else {\r\n          let flow = this.currentFunction.flow;\r\n          let tempLocal = this.currentFunction.getAndFreeTempLocal(\r\n            this.currentType,\r\n            !flow.canOverflow(leftExpr, this.currentType)\r\n          );\r\n          expr = module.createIf(\r\n            this.makeIsTrueish(\r\n              module.createTeeLocal(tempLocal.index, leftExpr),\r\n              this.currentType\r\n            ),\r\n            rightExpr,\r\n            module.createGetLocal(\r\n              assert(tempLocal).index, // to be sure\r\n              this.currentType.toNativeType()\r\n            )\r\n          );\r\n        }\r\n        break;\r\n      }\r\n      case Token.BAR_BAR: { // left || right\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType, WrapMode.NONE);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpression(right, leftType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n        rightType = this.currentType;\r\n\r\n        // simplify if cloning left without side effects is possible\r\n        if (expr = this.module.cloneExpression(leftExpr, true, 0)) {\r\n          expr = this.module.createIf(\r\n            this.makeIsTrueish(leftExpr, this.currentType),\r\n            expr,\r\n            rightExpr\r\n          );\r\n\r\n        // if not possible, tee left to a temp. local\r\n        } else {\r\n          let flow = this.currentFunction.flow;\r\n          let tempLocal = this.currentFunction.getAndFreeTempLocal(\r\n            this.currentType,\r\n            !flow.canOverflow(leftExpr, this.currentType)\r\n          );\r\n          expr = module.createIf(\r\n            this.makeIsTrueish(\r\n              module.createTeeLocal(tempLocal.index, leftExpr),\r\n              this.currentType\r\n            ),\r\n            module.createGetLocal(\r\n              assert(tempLocal).index, // to be sure\r\n              this.currentType.toNativeType()\r\n            ),\r\n            rightExpr\r\n          );\r\n        }\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        expr = this.module.createUnreachable();\r\n      }\r\n    }\r\n    return compound\r\n      ? this.compileAssignmentWithValue(left, expr, contextualType != Type.void)\r\n      : expr;\r\n  }\r\n\r\n  compileUnaryOverload(\r\n    operatorInstance: Function,\r\n    value: Expression,\r\n    valueExpr: ExpressionRef,\r\n    reportNode: Node\r\n  ): ExpressionRef {\r\n    var argumentExpressions: Expression[];\r\n    var thisArg: ExpressionRef = 0;\r\n    if (operatorInstance.is(CommonFlags.INSTANCE)) {\r\n      thisArg = valueExpr;  // can reuse the previously evaluated expr as the this value here\r\n      argumentExpressions = [];\r\n    } else {\r\n      argumentExpressions = [ value ]; // annotated type might differ -> recompile\r\n    }\r\n    return this.compileCallDirect(\r\n      operatorInstance,\r\n      argumentExpressions,\r\n      reportNode,\r\n      thisArg,\r\n      operatorInstance.hasDecorator(DecoratorFlags.INLINE)\r\n    );\r\n  }\r\n\r\n  compileBinaryOverload(\r\n    operatorInstance: Function,\r\n    left: Expression,\r\n    leftExpr: ExpressionRef,\r\n    right: Expression,\r\n    reportNode: Node\r\n  ): ExpressionRef {\r\n    var argumentExpressions: Expression[];\r\n    var thisArg: ExpressionRef = 0;\r\n    if (operatorInstance.is(CommonFlags.INSTANCE)) {\r\n      let parent = assert(operatorInstance.parent);\r\n      assert(parent.kind == ElementKind.CLASS);\r\n      thisArg = leftExpr; // can reuse the previously evaluated leftExpr as the this value here\r\n      argumentExpressions = [ right ];\r\n    } else {\r\n      argumentExpressions = [ left, right ]; // annotated type of LHS might differ -> recompile\r\n    }\r\n    var ret = this.compileCallDirect(\r\n      operatorInstance,\r\n      argumentExpressions,\r\n      reportNode,\r\n      thisArg,\r\n      operatorInstance.hasDecorator(DecoratorFlags.INLINE)\r\n    );\r\n    return ret;\r\n  }\r\n\r\n  compileAssignment(expression: Expression, valueExpression: Expression, contextualType: Type): ExpressionRef {\r\n    var program = this.program;\r\n    var resolver = program.resolver;\r\n    var currentFunction = this.currentFunction;\r\n    var target = resolver.resolveExpression(expression, currentFunction); // reports\r\n    if (!target) return this.module.createUnreachable();\r\n\r\n    // to compile just the value, we need to know the target's type\r\n    var targetType: Type;\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>target)) { // reports; not yet compiled if a static field compiled as a global\r\n          return this.module.createUnreachable();\r\n        }\r\n        assert((<Global>target).type != Type.void); // compileGlobal must guarantee this\r\n        // fall-through\r\n      }\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        targetType = (<VariableLikeElement>target).type;\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let setterPrototype = (<Property>target).setterPrototype;\r\n        if (setterPrototype) {\r\n          let instance = this.resolver.resolveFunction(setterPrototype, null);\r\n          if (!instance) return this.module.createUnreachable();\r\n          assert(instance.signature.parameterTypes.length == 1); // parser must guarantee this\r\n          targetType = instance.signature.parameterTypes[0];\r\n          break;\r\n        }\r\n        this.error(\r\n          DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n          expression.range, (<Property>target).internalName\r\n        );\r\n        return this.module.createUnreachable();\r\n      }\r\n      case ElementKind.CLASS: {\r\n        if (resolver.currentElementExpression) { // indexed access\r\n          let isUnchecked = currentFunction.flow.is(FlowFlags.UNCHECKED_CONTEXT);\r\n          let indexedSet = (<Class>target).lookupOverload(OperatorKind.INDEXED_SET, isUnchecked);\r\n          if (!indexedSet) {\r\n            let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET, isUnchecked);\r\n            if (!indexedGet) {\r\n              this.error(\r\n                DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n                expression.range, (<Class>target).internalName\r\n              );\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode.Index_signature_in_type_0_only_permits_reading,\r\n                expression.range, (<Class>target).internalName\r\n              );\r\n            }\r\n            return this.module.createUnreachable();\r\n          }\r\n          assert(indexedSet.signature.parameterTypes.length == 2); // parser must guarantee this\r\n          targetType = indexedSet.signature.parameterTypes[1];    // 2nd parameter is the element\r\n          break;\r\n        }\r\n        // fall-through\r\n      }\r\n      default: {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        return this.module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // compile the value and do the assignment\r\n    assert(targetType != Type.void);\r\n    var valueExpr = this.compileExpression(valueExpression, targetType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n    return this.compileAssignmentWithValue(\r\n      expression,\r\n      valueExpr,\r\n      contextualType != Type.void\r\n    );\r\n  }\r\n\r\n  compileAssignmentWithValue(\r\n    expression: Expression,\r\n    valueWithCorrectType: ExpressionRef,\r\n    tee: bool = false\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var target = this.resolver.resolveExpression(expression, this.currentFunction); // reports\r\n    if (!target) return module.createUnreachable();\r\n\r\n    switch (target.kind) {\r\n      case ElementKind.LOCAL: {\r\n        let type = (<Local>target).type;\r\n        assert(type != Type.void);\r\n        this.currentType = tee ? type : Type.void;\r\n        if ((<Local>target).is(CommonFlags.CONST)) {\r\n          this.error(\r\n            DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n            expression.range, target.internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        let flow = this.currentFunction.flow;\r\n        if (type.is(TypeFlags.SHORT | TypeFlags.INTEGER)) {\r\n          flow.setLocalWrapped((<Local>target).index, !flow.canOverflow(valueWithCorrectType, type));\r\n        }\r\n        return tee\r\n          ? module.createTeeLocal((<Local>target).index, valueWithCorrectType)\r\n          : module.createSetLocal((<Local>target).index, valueWithCorrectType);\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>target)) return module.createUnreachable();\r\n        let type = (<Global>target).type;\r\n        assert(type != Type.void);\r\n        this.currentType = tee ? type : Type.void;\r\n        if ((<Local>target).is(CommonFlags.CONST)) {\r\n          this.error(\r\n            DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n            expression.range,\r\n            target.internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        valueWithCorrectType = this.ensureSmallIntegerWrap(valueWithCorrectType, type); // guaranteed\r\n        if (tee) {\r\n          let nativeType = type.toNativeType();\r\n          let internalName = target.internalName;\r\n          return module.createBlock(null, [ // emulated teeGlobal\r\n            module.createSetGlobal(internalName, valueWithCorrectType),\r\n            module.createGetGlobal(internalName, nativeType)\r\n          ], nativeType);\r\n        } else {\r\n          return module.createSetGlobal(target.internalName, valueWithCorrectType);\r\n        }\r\n      }\r\n      case ElementKind.FIELD: {\r\n        const declaration = (<Field>target).declaration;\r\n        if (\r\n          (<Field>target).is(CommonFlags.READONLY) &&\r\n          !(\r\n            this.currentFunction.is(CommonFlags.CONSTRUCTOR) ||\r\n            declaration == null ||\r\n            declaration.initializer != null\r\n          )\r\n        ) {\r\n          this.error(\r\n            DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n            expression.range, (<Field>target).internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        let thisExpression = assert(this.resolver.currentThisExpression);\r\n        let thisExpr = this.compileExpressionRetainType(\r\n          thisExpression,\r\n          this.options.usizeType,\r\n          WrapMode.NONE\r\n        );\r\n        let type = (<Field>target).type;\r\n        this.currentType = tee ? type : Type.void;\r\n        let nativeType = type.toNativeType();\r\n        if (type.kind == TypeKind.BOOL) {\r\n          // make sure bools are wrapped (usually are) when storing as 8 bits\r\n          valueWithCorrectType = this.ensureSmallIntegerWrap(valueWithCorrectType, type);\r\n        }\r\n        if (tee) {\r\n          let currentFunction = this.currentFunction;\r\n          let flow = currentFunction.flow;\r\n          let tempLocal = currentFunction.getAndFreeTempLocal(\r\n            type,\r\n            !flow.canOverflow(valueWithCorrectType, type)\r\n          );\r\n          let tempLocalIndex = tempLocal.index;\r\n          // TODO: simplify if valueWithCorrectType has no side effects\r\n          // TODO: call __gc_link here if a GC is present\r\n          return module.createBlock(null, [\r\n            module.createSetLocal(tempLocalIndex, valueWithCorrectType),\r\n            module.createStore(\r\n              type.byteSize,\r\n              thisExpr,\r\n              module.createGetLocal(tempLocalIndex, nativeType),\r\n              nativeType,\r\n              (<Field>target).memoryOffset\r\n            ),\r\n            module.createGetLocal(tempLocalIndex, nativeType)\r\n          ], nativeType);\r\n        } else {\r\n          // TODO: call __gc_link here if a GC is present\r\n          return module.createStore(\r\n            type.byteSize,\r\n            thisExpr,\r\n            valueWithCorrectType,\r\n            nativeType,\r\n            (<Field>target).memoryOffset\r\n          );\r\n        }\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let setterPrototype = (<Property>target).setterPrototype;\r\n        if (setterPrototype) {\r\n          let setterInstance = this.resolver.resolveFunction(setterPrototype, null);\r\n          if (!setterInstance) return module.createUnreachable();\r\n\r\n          // call just the setter if the return value isn't of interest\r\n          if (!tee) {\r\n            if (setterInstance.is(CommonFlags.INSTANCE)) {\r\n              let thisExpression = assert(this.resolver.currentThisExpression);\r\n              let thisExpr = this.compileExpressionRetainType(\r\n                thisExpression,\r\n                this.options.usizeType,\r\n                WrapMode.NONE\r\n              );\r\n              return this.makeCallDirect(setterInstance, [ thisExpr, valueWithCorrectType ]);\r\n            } else {\r\n              return this.makeCallDirect(setterInstance, [ valueWithCorrectType ]);\r\n            }\r\n          }\r\n\r\n          // otherwise call the setter first, then the getter\r\n          let getterPrototype = (<Property>target).getterPrototype;\r\n          assert(getterPrototype != null); // must have one if there is a setter\r\n          let getterInstance = this.resolver.resolveFunction(<FunctionPrototype>getterPrototype, null);\r\n          if (!getterInstance) return module.createUnreachable();\r\n          let returnType = getterInstance.signature.returnType;\r\n          let nativeReturnType = returnType.toNativeType();\r\n          if (setterInstance.is(CommonFlags.INSTANCE)) {\r\n            let thisExpression = assert(this.resolver.currentThisExpression);\r\n            let thisExpr = this.compileExpressionRetainType(\r\n              thisExpression,\r\n              this.options.usizeType,\r\n              WrapMode.NONE\r\n            );\r\n            let tempLocal = this.currentFunction.getAndFreeTempLocal(returnType, false);\r\n            let tempLocalIndex = tempLocal.index;\r\n            return module.createBlock(null, [\r\n              this.makeCallDirect(setterInstance, [ // set and remember the target\r\n                module.createTeeLocal(tempLocalIndex, thisExpr),\r\n                valueWithCorrectType\r\n              ]),\r\n              this.makeCallDirect(getterInstance, [ // get from remembered target\r\n                module.createGetLocal(tempLocalIndex, nativeReturnType)\r\n              ])\r\n            ], nativeReturnType);\r\n          } else {\r\n            // note that this must be performed here because `resolved` is shared\r\n            return module.createBlock(null, [\r\n              this.makeCallDirect(setterInstance, [ valueWithCorrectType ]),\r\n              this.makeCallDirect(getterInstance)\r\n            ], nativeReturnType);\r\n          }\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,\r\n            expression.range, target.internalName\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      case ElementKind.CLASS: {\r\n        let elementExpression = this.resolver.currentElementExpression;\r\n        if (elementExpression) {\r\n          let isUnchecked = this.currentFunction.flow.is(FlowFlags.UNCHECKED_CONTEXT);\r\n          let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET, isUnchecked);\r\n          if (!indexedGet) {\r\n            this.error(\r\n              DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n              expression.range, target.internalName\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          let indexedSet = (<Class>target).lookupOverload(OperatorKind.INDEXED_SET, isUnchecked);\r\n          if (!indexedSet) {\r\n            this.error(\r\n              DiagnosticCode.Index_signature_in_type_0_only_permits_reading,\r\n              expression.range, target.internalName\r\n            );\r\n            this.currentType = tee ? indexedGet.signature.returnType : Type.void;\r\n            return module.createUnreachable();\r\n          }\r\n          let targetType = (<Class>target).type;\r\n          let thisExpression = assert(this.resolver.currentThisExpression);\r\n          let thisExpr = this.compileExpressionRetainType(\r\n            thisExpression,\r\n            this.options.usizeType,\r\n            WrapMode.NONE\r\n          );\r\n          let elementExpr = this.compileExpression(\r\n            elementExpression,\r\n            Type.i32,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n          if (tee) {\r\n            let currentFunction = this.currentFunction;\r\n            let tempLocalTarget = currentFunction.getTempLocal(targetType, false);\r\n            let tempLocalElement = currentFunction.getAndFreeTempLocal(this.currentType, false);\r\n            let returnType = indexedGet.signature.returnType;\r\n            this.currentFunction.freeTempLocal(tempLocalTarget);\r\n            return module.createBlock(null, [\r\n              this.makeCallDirect(indexedSet, [\r\n                module.createTeeLocal(tempLocalTarget.index, thisExpr),\r\n                module.createTeeLocal(tempLocalElement.index, elementExpr),\r\n                valueWithCorrectType\r\n              ]),\r\n              this.makeCallDirect(indexedGet, [\r\n                module.createGetLocal(tempLocalTarget.index, tempLocalTarget.type.toNativeType()),\r\n                module.createGetLocal(tempLocalElement.index, tempLocalElement.type.toNativeType())\r\n              ])\r\n            ], returnType.toNativeType());\r\n          } else {\r\n            return this.makeCallDirect(indexedSet, [\r\n              thisExpr,\r\n              elementExpr,\r\n              valueWithCorrectType\r\n            ]);\r\n          }\r\n        }\r\n        // fall-through\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      expression.range\r\n    );\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  compileCallExpression(expression: CallExpression, contextualType: Type): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n    var target = this.resolver.resolveExpression(expression.expression, currentFunction); // reports\r\n    if (!target) return module.createUnreachable();\r\n\r\n    var signature: Signature | null;\r\n    var indexArg: ExpressionRef;\r\n    switch (target.kind) {\r\n\r\n      // direct call: concrete function\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        let prototype = <FunctionPrototype>target;\r\n        let typeArguments = expression.typeArguments;\r\n\r\n        // builtins handle present respectively omitted type arguments on their own\r\n        if (prototype.hasDecorator(DecoratorFlags.BUILTIN)) {\r\n          return this.compileCallExpressionBuiltin(prototype, expression, contextualType);\r\n        }\r\n\r\n        let instance: Function | null = null;\r\n\r\n        // resolve generic call if type arguments have been provided\r\n        if (typeArguments) {\r\n          if (!prototype.is(CommonFlags.GENERIC)) {\r\n            this.error(\r\n              DiagnosticCode.Type_0_is_not_generic,\r\n              expression.expression.range, prototype.internalName\r\n            );\r\n            return module.createUnreachable();\r\n          }\r\n          instance = this.resolver.resolveFunctionInclTypeArguments(\r\n            prototype,\r\n            typeArguments,\r\n            this.currentFunction.flow.contextualTypeArguments,\r\n            expression\r\n          );\r\n\r\n        // infer generic call if type arguments have been omitted\r\n        } else if (prototype.is(CommonFlags.GENERIC)) {\r\n          let inferredTypes = new Map<string,Type | null>();\r\n          let typeParameters = assert(prototype.declaration.typeParameters);\r\n          let numTypeParameters = typeParameters.length;\r\n          for (let i = 0; i < numTypeParameters; ++i) {\r\n            inferredTypes.set(typeParameters[i].name.text, null);\r\n          }\r\n          // let numInferred = 0;\r\n          let parameterTypes = prototype.declaration.signature.parameters;\r\n          let numParameterTypes = parameterTypes.length;\r\n          let argumentExpressions = expression.arguments;\r\n          let numArguments = argumentExpressions.length;\r\n          let argumentExprs = new Array<ExpressionRef>(numArguments);\r\n          for (let i = 0; i < numParameterTypes; ++i) {\r\n            let typeNode = parameterTypes[i].type;\r\n            let name = typeNode.kind == NodeKind.TYPE ? (<TypeNode>typeNode).name.text : null;\r\n            let argumentExpression = i < numArguments\r\n              ? argumentExpressions[i]\r\n              : prototype.declaration.signature.parameters[i].initializer;\r\n            if (!argumentExpression) { // missing initializer -> too few arguments\r\n              this.error(\r\n                DiagnosticCode.Expected_0_arguments_but_got_1,\r\n                expression.range, numParameterTypes.toString(10), numArguments.toString(10)\r\n              );\r\n              return module.createUnreachable();\r\n            }\r\n            if (name !== null && inferredTypes.has(name)) {\r\n              let inferredType = inferredTypes.get(name);\r\n              if (inferredType) {\r\n                argumentExprs[i] = this.compileExpressionRetainType(argumentExpression, inferredType, WrapMode.NONE);\r\n                let commonType: Type | null;\r\n                if (!(commonType = Type.commonCompatible(inferredType, this.currentType, true))) {\r\n                  if (!(commonType = Type.commonCompatible(inferredType, this.currentType, false))) {\r\n                    this.error(\r\n                      DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n                      parameterTypes[i].type.range, this.currentType.toString(), inferredType.toString()\r\n                    );\r\n                    return module.createUnreachable();\r\n                  }\r\n                }\r\n                inferredType = commonType;\r\n              } else {\r\n                argumentExprs[i] = this.compileExpressionRetainType(argumentExpression, Type.i32, WrapMode.NONE);\r\n                inferredType = this.currentType;\r\n                // ++numInferred;\r\n              }\r\n              inferredTypes.set(name, inferredType);\r\n            } else {\r\n              let concreteType = this.resolver.resolveType(\r\n                parameterTypes[i].type,\r\n                this.currentFunction.flow.contextualTypeArguments\r\n              );\r\n              if (!concreteType) return module.createUnreachable();\r\n              argumentExprs[i] = this.compileExpression(\r\n                argumentExpression,\r\n                concreteType,\r\n                ConversionKind.IMPLICIT,\r\n                WrapMode.NONE\r\n              );\r\n            }\r\n          }\r\n          let resolvedTypeArguments = new Array<Type>(numTypeParameters);\r\n          for (let i = 0; i < numTypeParameters; ++i) {\r\n            let inferredType = assert(inferredTypes.get(typeParameters[i].name.text)); // TODO\r\n            resolvedTypeArguments[i] = inferredType;\r\n          }\r\n          instance = this.resolver.resolveFunction(\r\n            prototype,\r\n            resolvedTypeArguments,\r\n            this.currentFunction.flow.contextualTypeArguments\r\n          );\r\n          if (!instance) return this.module.createUnreachable();\r\n          return this.makeCallDirect(instance, argumentExprs);\r\n          // TODO: this skips inlining because inlining requires compiling its temporary locals in\r\n          // the scope of the inlined flow. might need another mechanism to lock temp. locals early,\r\n          // so inlining can be performed in `makeCallDirect` instead?\r\n\r\n        // otherwise resolve the non-generic call as usual\r\n        } else {\r\n          instance = this.resolver.resolveFunction(\r\n            prototype,\r\n            null,\r\n            this.currentFunction.flow.contextualTypeArguments\r\n          );\r\n        }\r\n        if (!instance) return this.module.createUnreachable();\r\n\r\n        // compile 'this' expression if an instance method\r\n        let thisExpr: ExpressionRef = 0;\r\n        if (instance.is(CommonFlags.INSTANCE)) {\r\n          thisExpr = this.compileExpressionRetainType(\r\n            assert(this.resolver.currentThisExpression),\r\n            this.options.usizeType,\r\n            WrapMode.NONE\r\n          );\r\n        }\r\n\r\n        return this.compileCallDirect(\r\n          instance,\r\n          expression.arguments,\r\n          expression,\r\n          thisExpr,\r\n          instance.hasDecorator(DecoratorFlags.INLINE)\r\n        );\r\n      }\r\n\r\n      // indirect call: index argument with signature (non-generic, can't be inlined)\r\n      case ElementKind.LOCAL: {\r\n        if (signature = (<Local>target).type.signatureReference) {\r\n          if ((<Local>target).is(CommonFlags.INLINED)) {\r\n            indexArg = module.createI32(i64_low((<Local>target).constantIntegerValue));\r\n          } else {\r\n            indexArg = module.createGetLocal((<Local>target).index, NativeType.I32);\r\n          }\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n            expression.range, (<Local>target).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (signature = (<Global>target).type.signatureReference) {\r\n          indexArg = module.createGetGlobal((<Global>target).internalName, (<Global>target).type.toNativeType());\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n            expression.range, (<Global>target).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.FIELD: {\r\n        let type = (<Field>target).type;\r\n        if (signature = type.signatureReference) {\r\n          let thisExpression = assert(this.resolver.currentThisExpression);\r\n          let thisExpr = this.compileExpressionRetainType(\r\n            thisExpression,\r\n            this.options.usizeType,\r\n            WrapMode.NONE\r\n          );\r\n          indexArg = module.createLoad(\r\n            4,\r\n            false,\r\n            thisExpr,\r\n            NativeType.I32,\r\n            (<Field>target).memoryOffset\r\n          );\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n            expression.range, type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.FUNCTION_TARGET: {\r\n        signature = (<FunctionTarget>target).signature;\r\n        indexArg = this.compileExpression(\r\n          expression.expression,\r\n          (<FunctionTarget>target).type,\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.NONE\r\n        );\r\n        break;\r\n      }\r\n\r\n      case ElementKind.PROPERTY: {\r\n        indexArg = this.compileGetter(<Property>target, expression.expression);\r\n        let type = this.currentType;\r\n        signature = type.signatureReference;\r\n        if (!signature) {\r\n          this.error(\r\n            DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n            expression.range, type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        break;\r\n      }\r\n\r\n      // not supported\r\n      default: {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n    return this.compileCallIndirect(\r\n      signature,\r\n      indexArg,\r\n      expression.arguments,\r\n      expression\r\n    );\r\n  }\r\n\r\n  private compileCallExpressionBuiltin(\r\n    prototype: FunctionPrototype,\r\n    expression: CallExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    var typeArguments: Type[] | null = null;\r\n\r\n    // builtins handle omitted type arguments on their own. if present, however, resolve them here\r\n    // and pass them to the builtin, even if it's still up to the builtin how to handle them.\r\n    var typeArgumentNodes = expression.typeArguments;\r\n    if (expression.typeArguments) {\r\n      if (!prototype.is(CommonFlags.GENERIC)) {\r\n        this.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          expression.range, prototype.internalName\r\n        );\r\n      }\r\n      typeArguments = this.resolver.resolveTypeArguments(\r\n        assert(prototype.declaration.typeParameters),\r\n        typeArgumentNodes,\r\n        this.currentFunction.flow.contextualTypeArguments,\r\n        expression\r\n      );\r\n    }\r\n\r\n    // now compile the builtin, which usually returns a block of code that replaces the call.\r\n    var expr = compileBuiltinCall(\r\n      this,\r\n      prototype,\r\n      typeArguments,\r\n      expression.arguments,\r\n      contextualType,\r\n      expression\r\n    );\r\n    if (!expr) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        expression.range\r\n      );\r\n      return this.module.createUnreachable();\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  /**\r\n   * Checks that a call with the given number as arguments can be performed according to the\r\n   * specified signature.\r\n   */\r\n  checkCallSignature(\r\n    signature: Signature,\r\n    numArguments: i32,\r\n    hasThis: bool,\r\n    reportNode: Node\r\n  ): bool {\r\n\r\n    // cannot call an instance method without a `this` argument (TODO: `.call`?)\r\n    var thisType = signature.thisType;\r\n    if (hasThis != (thisType != null)) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported, // TODO: better message?\r\n        reportNode.range\r\n      );\r\n      return false;\r\n    }\r\n\r\n    // not yet implemented (TODO: maybe some sort of an unmanaged/lightweight array?)\r\n    var hasRest = signature.hasRest;\r\n    if (hasRest) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        reportNode.range\r\n      );\r\n      return false;\r\n    }\r\n\r\n    var minimum = signature.requiredParameters;\r\n    var maximum = signature.parameterTypes.length;\r\n\r\n    // must at least be called with required arguments\r\n    if (numArguments < minimum) {\r\n      this.error(\r\n        minimum < maximum\r\n          ? DiagnosticCode.Expected_at_least_0_arguments_but_got_1\r\n          : DiagnosticCode.Expected_0_arguments_but_got_1,\r\n        reportNode.range, minimum.toString(), numArguments.toString()\r\n      );\r\n      return false;\r\n    }\r\n\r\n    // must not be called with more than the maximum arguments\r\n    if (numArguments > maximum && !hasRest) {\r\n      this.error(\r\n        DiagnosticCode.Expected_0_arguments_but_got_1,\r\n        reportNode.range, maximum.toString(), numArguments.toString()\r\n      );\r\n      return false;\r\n    }\r\n\r\n    return true;\r\n  }\r\n\r\n  /** Compiles a direct call to a concrete function. */\r\n  compileCallDirect(\r\n    instance: Function,\r\n    argumentExpressions: Expression[],\r\n    reportNode: Node,\r\n    thisArg: ExpressionRef = 0,\r\n    inline: bool = false\r\n  ): ExpressionRef {\r\n    var numArguments = argumentExpressions.length;\r\n    var signature = instance.signature;\r\n\r\n    if (!this.checkCallSignature( // reports\r\n      signature,\r\n      numArguments,\r\n      thisArg != 0,\r\n      reportNode\r\n    )) {\r\n      return this.module.createUnreachable();\r\n    }\r\n\r\n    // Inline if explicitly requested\r\n    if (inline) {\r\n      assert(!instance.is(CommonFlags.TRAMPOLINE)); // doesn't make sense\r\n      if (this.currentInlineFunctions.includes(instance)) {\r\n        this.warning(\r\n          DiagnosticCode.Function_0_cannot_be_inlined_into_itself,\r\n          reportNode.range, instance.internalName\r\n        );\r\n      } else {\r\n        this.currentInlineFunctions.push(instance);\r\n        let expr = this.compileCallInlineUnchecked(instance, argumentExpressions, reportNode, thisArg);\r\n        this.currentInlineFunctions.pop();\r\n        return expr;\r\n      }\r\n    }\r\n\r\n    // Otherwise compile to just a call\r\n    var numArgumentsInclThis = thisArg ? numArguments + 1 : numArguments;\r\n    var operands = new Array<ExpressionRef>(numArgumentsInclThis);\r\n    var index = 0;\r\n    if (thisArg) {\r\n      operands[0] = thisArg;\r\n      index = 1;\r\n    }\r\n    var parameterTypes = signature.parameterTypes;\r\n    for (let i = 0; i < numArguments; ++i, ++index) {\r\n      operands[index] = this.compileExpression(\r\n        argumentExpressions[i],\r\n        parameterTypes[i],\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    assert(index == numArgumentsInclThis);\r\n    return this.makeCallDirect(instance, operands);\r\n  }\r\n\r\n  // Depends on being pre-checked in compileCallDirect\r\n  private compileCallInlineUnchecked(\r\n    instance: Function,\r\n    argumentExpressions: Expression[],\r\n    reportNode: Node,\r\n    thisArg: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    var numArguments = argumentExpressions.length;\r\n    var signature = instance.signature;\r\n    var currentFunction = this.currentFunction;\r\n    var module = this.module;\r\n    var declaration = instance.prototype.declaration;\r\n\r\n    // Create an empty child flow with its own scope and mark it for inlining\r\n    var previousFlow = currentFunction.flow;\r\n    var returnLabel = instance.internalName + \"|inlined.\" + (instance.nextInlineId++).toString(10);\r\n    var returnType = instance.signature.returnType;\r\n    var flow = Flow.create(currentFunction);\r\n    flow.set(FlowFlags.INLINE_CONTEXT);\r\n    flow.returnLabel = returnLabel;\r\n    flow.returnType = returnType;\r\n    flow.contextualTypeArguments = instance.contextualTypeArguments;\r\n\r\n    // Convert provided call arguments to temporary locals. It is important that these are compiled\r\n    // here, with their respective locals being blocked. There is no 'makeCallInline'.\r\n    var body = [];\r\n    if (thisArg) {\r\n      let parent = assert(instance.parent);\r\n      assert(parent.kind == ElementKind.CLASS);\r\n      if (getExpressionId(thisArg) == ExpressionId.GetLocal) {\r\n        flow.addScopedLocalAlias(\r\n          getGetLocalIndex(thisArg),\r\n          (<Class>parent).type,\r\n          \"this\"\r\n        );\r\n      } else {\r\n        let thisLocal = flow.addScopedLocal((<Class>parent).type, \"this\", false);\r\n        body.push(\r\n          module.createSetLocal(thisLocal.index, thisArg)\r\n        );\r\n      }\r\n    }\r\n    var parameterTypes = signature.parameterTypes;\r\n    for (let i = 0; i < numArguments; ++i) {\r\n      let paramExpr = this.compileExpression(\r\n        argumentExpressions[i],\r\n        parameterTypes[i],\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      if (getExpressionId(paramExpr) == ExpressionId.GetLocal) {\r\n        flow.addScopedLocalAlias(\r\n          getGetLocalIndex(paramExpr),\r\n          parameterTypes[i],\r\n          signature.getParameterName(i)\r\n        );\r\n        // inherits wrap status\r\n      } else {\r\n        let argumentLocal = flow.addScopedLocal(\r\n          parameterTypes[i],\r\n          signature.getParameterName(i),\r\n          !flow.canOverflow(paramExpr, parameterTypes[i])\r\n        );\r\n        body.push(\r\n          module.createSetLocal(argumentLocal.index, paramExpr)\r\n        );\r\n      }\r\n    }\r\n\r\n    // Compile optional parameter initializers in the scope of the inlined flow\r\n    currentFunction.flow = flow;\r\n    var numParameters = signature.parameterTypes.length;\r\n    for (let i = numArguments; i < numParameters; ++i) {\r\n      let initExpr = this.compileExpression(\r\n        assert(declaration.signature.parameters[i].initializer),\r\n        parameterTypes[i],\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.WRAP\r\n      );\r\n      let argumentLocal = flow.addScopedLocal(\r\n        parameterTypes[i],\r\n        signature.getParameterName(i),\r\n        !flow.canOverflow(initExpr, parameterTypes[i])\r\n      );\r\n      body.push(\r\n        module.createSetLocal(argumentLocal.index, initExpr)\r\n      );\r\n    }\r\n\r\n    // Compile the called function's body in the scope of the inlined flow\r\n    var bodyStatement = assert(declaration.body);\r\n    if (bodyStatement.kind == NodeKind.BLOCK) {\r\n      let statements = (<BlockStatement>bodyStatement).statements;\r\n      for (let i = 0, k = statements.length; i < k; ++i) {\r\n        let stmt = this.compileStatement(statements[i]);\r\n        if (getExpressionId(stmt) != ExpressionId.Nop) {\r\n          body.push(stmt);\r\n          if (flow.isAny(FlowFlags.ANY_TERMINATING)) break;\r\n        }\r\n      }\r\n    } else {\r\n      body.push(this.compileStatement(bodyStatement));\r\n    }\r\n\r\n    // Free any new scoped locals and reset to the original flow\r\n    var scopedLocals = flow.scopedLocals;\r\n    if (scopedLocals) {\r\n      for (let scopedLocal of scopedLocals.values()) {\r\n        if (scopedLocal.is(CommonFlags.SCOPED)) { // otherwise an alias\r\n          currentFunction.freeTempLocal(scopedLocal);\r\n        }\r\n      }\r\n      flow.scopedLocals = null;\r\n    }\r\n    flow.finalize();\r\n    this.currentFunction.flow = previousFlow;\r\n    this.currentType = returnType;\r\n\r\n    // Check that all branches are terminated\r\n    if (returnType != Type.void && !flow.isAny(FlowFlags.ANY_TERMINATING)) {\r\n      this.error(\r\n        DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,\r\n        declaration.signature.returnType.range\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    return module.createBlock(returnLabel, body, returnType.toNativeType());\r\n  }\r\n\r\n  /** Gets the trampoline for the specified function. */\r\n  ensureTrampoline(original: Function): Function {\r\n    // A trampoline is a function that takes a fixed amount of operands with some of them possibly\r\n    // being zeroed. It takes one additional argument denoting the number of actual operands\r\n    // provided to the call, and takes appropriate steps to initialize zeroed operands to their\r\n    // default values using the optional parameter initializers of the original function. Doing so\r\n    // allows calls to functions with optional parameters to circumvent the trampoline when all\r\n    // parameters are provided as a fast route, respectively setting up omitted operands in a proper\r\n    // context otherwise.\r\n    var trampoline = original.trampoline;\r\n    if (trampoline) return trampoline;\r\n\r\n    var originalSignature = original.signature;\r\n    var originalName = original.internalName;\r\n    var originalParameterTypes = originalSignature.parameterTypes;\r\n    var originalParameterDeclarations = original.prototype.declaration.signature.parameters;\r\n    var commonReturnType = originalSignature.returnType;\r\n    var commonThisType = originalSignature.thisType;\r\n    var isInstance = original.is(CommonFlags.INSTANCE);\r\n\r\n    // arguments excl. `this`, operands incl. `this`\r\n    var minArguments = originalSignature.requiredParameters;\r\n    var minOperands = minArguments;\r\n    var maxArguments = originalParameterTypes.length;\r\n    var maxOperands = maxArguments;\r\n    if (isInstance) {\r\n      ++minOperands;\r\n      ++maxOperands;\r\n    }\r\n    var numOptional = assert(maxOperands - minOperands);\r\n\r\n    var forwardedOperands = new Array<ExpressionRef>(minOperands);\r\n    var operandIndex = 0;\r\n\r\n    // forward `this` if applicable\r\n    var module = this.module;\r\n    if (isInstance) {\r\n      forwardedOperands[0] = module.createGetLocal(0, this.options.nativeSizeType);\r\n      operandIndex = 1;\r\n    }\r\n\r\n    // forward required arguments\r\n    for (let i = 0; i < minArguments; ++i, ++operandIndex) {\r\n      forwardedOperands[operandIndex] = module.createGetLocal(operandIndex, originalParameterTypes[i].toNativeType());\r\n    }\r\n    assert(operandIndex == minOperands);\r\n\r\n    // create the trampoline element\r\n    var trampolineSignature = new Signature(originalParameterTypes, commonReturnType, commonThisType);\r\n    var trampolineName = originalName + \"|trampoline\";\r\n    trampolineSignature.requiredParameters = maxArguments;\r\n    trampoline = new Function(\r\n      original.prototype,\r\n      trampolineName,\r\n      trampolineSignature,\r\n      original.parent,\r\n      original.contextualTypeArguments\r\n    );\r\n    trampoline.set(original.flags | CommonFlags.TRAMPOLINE | CommonFlags.COMPILED);\r\n    original.trampoline = trampoline;\r\n\r\n    // compile initializers of omitted arguments in scope of the trampoline function\r\n    // this is necessary because initializers might need additional locals and a proper this context\r\n    var previousFunction = this.currentFunction;\r\n    this.currentFunction = trampoline;\r\n\r\n    // create a br_table switching over the number of optional parameters provided\r\n    var numNames = numOptional + 1; // incl. outer block\r\n    var names = new Array<string>(numNames);\r\n    var ofN = \"of\" + numOptional.toString(10);\r\n    for (let i = 0; i < numNames; ++i) {\r\n      let label = i.toString(10) + ofN;\r\n      names[i] = label;\r\n    }\r\n    var body = module.createBlock(names[0], [\r\n      module.createBlock(\"outOfRange\", [\r\n        module.createSwitch(names, \"outOfRange\",\r\n          // condition is number of provided optional arguments, so subtract required arguments\r\n          minArguments\r\n            ? module.createBinary(\r\n                BinaryOp.SubI32,\r\n                module.createGetGlobal(\"~argc\", NativeType.I32),\r\n                module.createI32(minArguments)\r\n              )\r\n            : module.createGetGlobal(\"~argc\", NativeType.I32)\r\n        )\r\n      ]),\r\n      module.createUnreachable()\r\n    ]);\r\n    for (let i = 0; i < numOptional; ++i, ++operandIndex) {\r\n      let type = originalParameterTypes[minArguments + i];\r\n      let declaration = originalParameterDeclarations[minArguments + i];\r\n      let initializer = declaration.initializer;\r\n      let initExpr: ExpressionRef;\r\n      if (initializer) {\r\n        initExpr = module.createSetLocal(operandIndex,\r\n          this.compileExpression(\r\n            initializer,\r\n            type,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.WRAP\r\n          )\r\n        );\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Optional_parameter_must_have_an_initializer,\r\n          declaration.range\r\n        );\r\n        initExpr = module.createUnreachable();\r\n      }\r\n      body = module.createBlock(names[i + 1], [\r\n        body,\r\n        initExpr,\r\n      ]);\r\n      forwardedOperands[operandIndex] = module.createGetLocal(operandIndex, type.toNativeType());\r\n    }\r\n    this.currentFunction = previousFunction;\r\n    assert(operandIndex == maxOperands);\r\n\r\n    var funcRef = module.addFunction(\r\n      trampolineName,\r\n      this.ensureFunctionType(\r\n        trampolineSignature.parameterTypes,\r\n        trampolineSignature.returnType,\r\n        trampolineSignature.thisType\r\n      ),\r\n      typesToNativeTypes(trampoline.additionalLocals),\r\n      module.createBlock(null, [\r\n        body,\r\n        module.createCall(\r\n          originalName,\r\n          forwardedOperands,\r\n          commonReturnType.toNativeType()\r\n        )\r\n      ], commonReturnType.toNativeType())\r\n    );\r\n    trampoline.finalize(module, funcRef);\r\n    return trampoline;\r\n  }\r\n\r\n  /** Makes sure that the argument count helper global is present and returns its name. */\r\n  private ensureArgcVar(): string {\r\n    var internalName = \"~argc\";\r\n    if (!this.argcVar) {\r\n      let module = this.module;\r\n      this.argcVar = module.addGlobal(\r\n        internalName,\r\n        NativeType.I32,\r\n        true,\r\n        module.createI32(0)\r\n      );\r\n    }\r\n    return internalName;\r\n  }\r\n\r\n  /** Makes sure that the argument count helper setter is present and returns its name. */\r\n  private ensureArgcSet(): string {\r\n    var internalName = \"~setargc\";\r\n    if (!this.argcSet) {\r\n      let module = this.module;\r\n      this.argcSet = module.addFunction(internalName,\r\n        this.ensureFunctionType([ Type.u32 ], Type.void),\r\n        null,\r\n        module.createSetGlobal(this.ensureArgcVar(),\r\n          module.createGetLocal(0, NativeType.I32)\r\n        )\r\n      );\r\n      module.addFunctionExport(internalName, \"_setargc\");\r\n    }\r\n    return internalName;\r\n  }\r\n\r\n  /** Creates a direct call to the specified function. */\r\n  makeCallDirect(\r\n    instance: Function,\r\n    operands: ExpressionRef[] | null = null\r\n  ): ExpressionRef {\r\n    var numOperands = operands ? operands.length : 0;\r\n    var numArguments = numOperands;\r\n    var minArguments = instance.signature.requiredParameters;\r\n    var minOperands = minArguments;\r\n    var maxArguments = instance.signature.parameterTypes.length;\r\n    var maxOperands = maxArguments;\r\n    if (instance.is(CommonFlags.INSTANCE)) {\r\n      ++minOperands;\r\n      ++maxOperands;\r\n      --numArguments;\r\n    }\r\n    assert(numOperands >= minOperands);\r\n\r\n    var module = this.module;\r\n    if (!this.compileFunction(instance)) return module.createUnreachable();\r\n    var returnType = instance.signature.returnType;\r\n    var isCallImport = instance.is(CommonFlags.MODULE_IMPORT);\r\n\r\n    // fill up omitted arguments with their initializers, if constant, otherwise with zeroes.\r\n    if (numOperands < maxOperands) {\r\n      if (!operands) {\r\n        operands = new Array(maxOperands);\r\n        operands.length = 0;\r\n      }\r\n      let parameterTypes = instance.signature.parameterTypes;\r\n      let parameterNodes = instance.prototype.declaration.signature.parameters;\r\n      let allOptionalsAreConstant = true;\r\n      for (let i = numArguments; i < maxArguments; ++i) {\r\n        let initializer = parameterNodes[i].initializer;\r\n        if (!(initializer !== null && nodeIsConstantValue(initializer.kind))) {\r\n          allOptionalsAreConstant = false;\r\n          break;\r\n        }\r\n      }\r\n      if (allOptionalsAreConstant) { // inline into the call\r\n        for (let i = numArguments; i < maxArguments; ++i) {\r\n          operands.push(\r\n            this.compileExpression(\r\n              <Expression>parameterNodes[i].initializer,\r\n              parameterTypes[i],\r\n              ConversionKind.IMPLICIT,\r\n              WrapMode.NONE\r\n            )\r\n          );\r\n        }\r\n      } else { // otherwise fill up with zeroes and call the trampoline\r\n        for (let i = numArguments; i < maxArguments; ++i) {\r\n          operands.push(parameterTypes[i].toNativeZero(module));\r\n        }\r\n        if (!isCallImport) {\r\n          let original = instance;\r\n          instance = this.ensureTrampoline(instance);\r\n          if (!this.compileFunction(instance)) return module.createUnreachable();\r\n          instance.flow.flags = original.flow.flags;\r\n          this.program.instancesLookup.set(instance.internalName, instance); // so canOverflow can find it\r\n          let nativeReturnType = returnType.toNativeType();\r\n          this.currentType = returnType;\r\n          return module.createBlock(null, [\r\n            module.createSetGlobal(this.ensureArgcVar(), module.createI32(numArguments)),\r\n            module.createCall(instance.internalName, operands, nativeReturnType)\r\n          ], nativeReturnType);\r\n        }\r\n      }\r\n    }\r\n\r\n    // otherwise just call through\r\n    this.currentType = returnType;\r\n    if (isCallImport) return module.createCallImport(instance.internalName, operands, returnType.toNativeType());\r\n    var ret = module.createCall(instance.internalName, operands, returnType.toNativeType());\r\n    return ret;\r\n  }\r\n\r\n  /** Compiles an indirect call using an index argument and a signature. */\r\n  compileCallIndirect(\r\n    signature: Signature,\r\n    indexArg: ExpressionRef,\r\n    argumentExpressions: Expression[],\r\n    reportNode: Node,\r\n    thisArg: ExpressionRef = 0\r\n  ): ExpressionRef {\r\n    var numArguments = argumentExpressions.length;\r\n\r\n    if (!this.checkCallSignature( // reports\r\n      signature,\r\n      numArguments,\r\n      thisArg != 0,\r\n      reportNode\r\n    )) {\r\n      return this.module.createUnreachable();\r\n    }\r\n\r\n    var numArgumentsInclThis = thisArg ? numArguments + 1 : numArguments;\r\n    var operands = new Array<ExpressionRef>(numArgumentsInclThis);\r\n    var index = 0;\r\n    if (thisArg) {\r\n      operands[0] = thisArg;\r\n      index = 1;\r\n    }\r\n    var parameterTypes = signature.parameterTypes;\r\n    for (let i = 0; i < numArguments; ++i, ++index) {\r\n      operands[index] = this.compileExpression(\r\n        argumentExpressions[i],\r\n        parameterTypes[i],\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    assert(index == numArgumentsInclThis);\r\n    return this.makeCallIndirect(signature, indexArg, operands);\r\n  }\r\n\r\n  /** Creates an indirect call to the function at `indexArg` in the function table. */\r\n  makeCallIndirect(\r\n    signature: Signature,\r\n    indexArg: ExpressionRef,\r\n    operands: ExpressionRef[] | null = null\r\n  ): ExpressionRef {\r\n    var numOperands = operands ? operands.length : 0;\r\n    var numArguments = numOperands;\r\n    var minArguments = signature.requiredParameters;\r\n    var minOperands = minArguments;\r\n    var maxArguments = signature.parameterTypes.length;\r\n    var maxOperands = maxArguments;\r\n    if (signature.thisType) {\r\n      ++minOperands;\r\n      ++maxOperands;\r\n      --numArguments;\r\n    }\r\n    assert(numOperands >= minOperands);\r\n\r\n    this.ensureFunctionType(signature.parameterTypes, signature.returnType, signature.thisType);\r\n    var module = this.module;\r\n\r\n    // fill up omitted arguments with zeroes\r\n    if (numOperands < maxOperands) {\r\n      if (!operands) {\r\n        operands = new Array(maxOperands);\r\n        operands.length = 0;\r\n      }\r\n      let parameterTypes = signature.parameterTypes;\r\n      for (let i = numArguments; i < maxArguments; ++i) {\r\n        operands.push(parameterTypes[i].toNativeZero(module));\r\n      }\r\n    }\r\n\r\n    var returnType = signature.returnType;\r\n    this.currentType = returnType;\r\n    return module.createBlock(null, [\r\n      module.createSetGlobal(this.ensureArgcVar(), // might still be calling a trampoline\r\n        module.createI32(numArguments)\r\n      ),\r\n      module.createCallIndirect(indexArg, operands, signature.toSignatureString())\r\n    ], returnType.toNativeType()); // not necessarily wrapped\r\n  }\r\n\r\n  compileCommaExpression(expression: CommaExpression, contextualType: Type): ExpressionRef {\r\n    var expressions = expression.expressions;\r\n    var numExpressions = expressions.length;\r\n    var exprs = new Array<ExpressionRef>(numExpressions--);\r\n    for (let i = 0; i < numExpressions; ++i) {\r\n      exprs[i] = this.compileExpression(\r\n        expressions[i],\r\n        Type.void, // drop all\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    exprs[numExpressions] = this.compileExpression(\r\n      expressions[numExpressions],\r\n      contextualType, // except last\r\n      ConversionKind.IMPLICIT,\r\n      WrapMode.NONE\r\n    );\r\n    return this.module.createBlock(null, exprs, this.currentType.toNativeType());\r\n  }\r\n\r\n  compileElementAccessExpression(expression: ElementAccessExpression, contextualType: Type): ExpressionRef {\r\n    var target = this.resolver.resolveElementAccess(expression, this.currentFunction); // reports\r\n    if (!target) return this.module.createUnreachable();\r\n    switch (target.kind) {\r\n      case ElementKind.CLASS: {\r\n        let isUnchecked = this.currentFunction.flow.is(FlowFlags.UNCHECKED_CONTEXT);\r\n        let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET, isUnchecked);\r\n        if (!indexedGet) {\r\n          this.error(\r\n            DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n            expression.expression.range, (<Class>target).internalName\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n        let thisArg = this.compileExpression(\r\n          expression.expression,\r\n          (<Class>target).type,\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.NONE\r\n        );\r\n        return this.compileCallDirect(indexedGet, [\r\n          expression.elementExpression\r\n        ], expression, thisArg);\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      expression.range\r\n    );\r\n    return this.module.createUnreachable();\r\n  }\r\n\r\n  compileFunctionExpression(expression: FunctionExpression, contextualType: Type): ExpressionRef {\r\n    var declaration = expression.declaration;\r\n    var name = declaration.name;\r\n    var simpleName = (name.text.length\r\n      ? name.text\r\n      : \"anonymous\") + \"|\" + this.functionTable.length.toString(10);\r\n    var currentFunction = this.currentFunction;\r\n    var prototype = new FunctionPrototype(\r\n      this.program,\r\n      simpleName,\r\n      currentFunction.internalName + INNER_DELIMITER + simpleName,\r\n      declaration,\r\n      null,\r\n      DecoratorFlags.NONE\r\n    );\r\n    var flow = currentFunction.flow;\r\n    var instance = this.compileFunctionUsingTypeArguments(\r\n      prototype,\r\n      [],\r\n      flow.contextualTypeArguments,\r\n      flow,\r\n      declaration\r\n    );\r\n    if (!instance) return this.module.createUnreachable();\r\n    this.currentType = instance.signature.type; // TODO: get cached type?\r\n    // NOTE that, in order to make this work in every case, the function must be represented by a\r\n    // value, so we add it and rely on the optimizer to figure out where it can be called directly.\r\n    var index = this.ensureFunctionTableEntry(instance); // reports\r\n    return index < 0\r\n      ? this.module.createUnreachable()\r\n      : this.module.createI32(index);\r\n  }\r\n\r\n  /**\r\n   * Compiles an identifier in the specified context.\r\n   * @param retainConstantType Retains the type of inlined constants if `true`, otherwise\r\n   *  precomputes them according to context.\r\n   */\r\n  compileIdentifierExpression(\r\n    expression: IdentifierExpression,\r\n    contextualType: Type,\r\n    retainConstantType: bool\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n\r\n    // check special keywords first\r\n    switch (expression.kind) {\r\n      case NodeKind.NULL: {\r\n        let options = this.options;\r\n        if (!contextualType.classReference) {\r\n          this.currentType = options.usizeType;\r\n        }\r\n        return options.isWasm64\r\n          ? module.createI64(0)\r\n          : module.createI32(0);\r\n      }\r\n      case NodeKind.TRUE: {\r\n        this.currentType = Type.bool;\r\n        return module.createI32(1);\r\n      }\r\n      case NodeKind.FALSE: {\r\n        this.currentType = Type.bool;\r\n        return module.createI32(0);\r\n      }\r\n      case NodeKind.THIS: {\r\n        let flow = currentFunction.flow;\r\n        if (flow.is(FlowFlags.INLINE_CONTEXT)) {\r\n          let scopedThis = flow.getScopedLocal(\"this\");\r\n          if (scopedThis) {\r\n            this.currentType = scopedThis.type;\r\n            return module.createGetLocal(scopedThis.index, scopedThis.type.toNativeType());\r\n          }\r\n        }\r\n        if (currentFunction.is(CommonFlags.INSTANCE)) {\r\n          let parent = assert(currentFunction.parent);\r\n          assert(parent.kind == ElementKind.CLASS);\r\n          let thisType = (<Class>parent).type;\r\n          if (currentFunction.is(CommonFlags.CONSTRUCTOR)) {\r\n            if (!flow.is(FlowFlags.ALLOCATES)) {\r\n              flow.set(FlowFlags.ALLOCATES);\r\n              // must be conditional because `this` could have been provided by a derived class\r\n              this.currentType = thisType;\r\n              return module.createTeeLocal(0,\r\n                this.makeConditionalAllocate(<Class>parent, expression)\r\n              );\r\n            }\r\n          }\r\n          this.currentType = thisType;\r\n          return module.createGetLocal(0, thisType.toNativeType());\r\n        }\r\n        this.error(\r\n          DiagnosticCode._this_cannot_be_referenced_in_current_location,\r\n          expression.range\r\n        );\r\n        this.currentType = this.options.usizeType;\r\n        return module.createUnreachable();\r\n      }\r\n      case NodeKind.SUPER: {\r\n        let flow = currentFunction.flow;\r\n        if (flow.is(FlowFlags.INLINE_CONTEXT)) {\r\n          let scopedThis = flow.getScopedLocal(\"this\");\r\n          if (scopedThis) {\r\n            let scopedThisClass = assert(scopedThis.type.classReference);\r\n            let base = scopedThisClass.base;\r\n            if (base) {\r\n              this.currentType = base.type;\r\n              return module.createGetLocal(scopedThis.index, base.type.toNativeType());\r\n            }\r\n          }\r\n        }\r\n        if (currentFunction.is(CommonFlags.INSTANCE)) {\r\n          let parent = assert(currentFunction.parent);\r\n          assert(parent.kind == ElementKind.CLASS);\r\n          let base = (<Class>parent).base;\r\n          if (base) {\r\n            let superType = base.type;\r\n            this.currentType = superType;\r\n            return module.createGetLocal(0, superType.toNativeType());\r\n          }\r\n        }\r\n        this.error(\r\n          DiagnosticCode._super_can_only_be_referenced_in_a_derived_class,\r\n          expression.range\r\n        );\r\n        this.currentType = this.options.usizeType;\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // otherwise resolve\r\n    var target = this.resolver.resolveIdentifier( // reports\r\n      expression,\r\n      this.currentEnum || currentFunction\r\n    );\r\n    if (!target) return module.createUnreachable();\r\n\r\n    switch (target.kind) {\r\n      case ElementKind.LOCAL: {\r\n        let localType = (<Local>target).type;\r\n        assert(localType != Type.void);\r\n        if ((<Local>target).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Local>target, contextualType, retainConstantType);\r\n        }\r\n        let localIndex = (<Local>target).index;\r\n        assert(localIndex >= 0);\r\n        this.currentType = localType;\r\n        return this.module.createGetLocal(localIndex, localType.toNativeType());\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>target)) { // reports; not yet compiled if a static field\r\n          return this.module.createUnreachable();\r\n        }\r\n        let globalType = (<Global>target).type;\r\n        assert(globalType != Type.void);\r\n        if ((<Global>target).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Global>target, contextualType, retainConstantType);\r\n        }\r\n        this.currentType = globalType;\r\n        return this.module.createGetGlobal((<Global>target).internalName, globalType.toNativeType());\r\n      }\r\n      case ElementKind.ENUMVALUE: { // here: if referenced from within the same enum\r\n        if (!target.is(CommonFlags.COMPILED)) {\r\n          this.error(\r\n            DiagnosticCode.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums,\r\n            expression.range\r\n          );\r\n          this.currentType = Type.i32;\r\n          return this.module.createUnreachable();\r\n        }\r\n        this.currentType = Type.i32;\r\n        if ((<EnumValue>target).is(CommonFlags.INLINED)) {\r\n          return this.module.createI32((<EnumValue>target).constantValue);\r\n        }\r\n        return this.module.createGetGlobal((<EnumValue>target).internalName, NativeType.I32);\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        let instance = this.resolver.resolveFunction(\r\n          <FunctionPrototype>target,\r\n          null,\r\n          currentFunction.flow.contextualTypeArguments\r\n        );\r\n        if (!(instance && this.compileFunction(instance))) return module.createUnreachable();\r\n        let index = this.ensureFunctionTableEntry(instance);\r\n        this.currentType = instance.signature.type;\r\n        return this.module.createI32(index);\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      expression.range\r\n    );\r\n    return this.module.createUnreachable();\r\n  }\r\n\r\n  compileInstanceOfExpression(\r\n    expression: InstanceOfExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    // NOTE that this differs from TypeScript in that the rhs is a type, not an expression. at the\r\n    // time of implementation, this seemed more useful because dynamic rhs expressions are not\r\n    // possible in AS anyway.\r\n    var expr = this.compileExpressionRetainType(expression.expression, this.options.usizeType, WrapMode.NONE);\r\n    var type = this.currentType;\r\n    var isType = this.resolver.resolveType(expression.isType);\r\n    this.currentType = Type.bool;\r\n    if (!isType) return module.createUnreachable();\r\n    return type.is(TypeFlags.NULLABLE) && !isType.is(TypeFlags.NULLABLE)\r\n      ? type.nonNullableType.isAssignableTo(isType)\r\n        ? module.createBinary( // not precomputeable\r\n            type.is(TypeFlags.LONG)\r\n              ? BinaryOp.NeI64\r\n              : BinaryOp.NeI32,\r\n            expr,\r\n            type.toNativeZero(module)\r\n          )\r\n        : module.createI32(0)\r\n      : module.createI32(type.isAssignableTo(isType, true) ? 1 : 0);\r\n  }\r\n\r\n  compileLiteralExpression(\r\n    expression: LiteralExpression,\r\n    contextualType: Type,\r\n    implicitNegate: bool = false\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    switch (expression.literalKind) {\r\n      case LiteralKind.ARRAY: {\r\n        assert(!implicitNegate);\r\n        let classType = contextualType.classReference;\r\n        if (\r\n          classType &&\r\n          classType.prototype == this.program.arrayPrototype\r\n        ) {\r\n          return this.compileArrayLiteral(\r\n            assert(classType.typeArguments)[0],\r\n            (<ArrayLiteralExpression>expression).elementExpressions,\r\n            false, // TODO: isConst?\r\n            expression\r\n          );\r\n        }\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      case LiteralKind.FLOAT: {\r\n        let floatValue = (<FloatLiteralExpression>expression).value;\r\n        if (implicitNegate) {\r\n          floatValue = -floatValue;\r\n        }\r\n        if (contextualType == Type.f32) {\r\n          return module.createF32(<f32>floatValue);\r\n        }\r\n        this.currentType = Type.f64;\r\n        return module.createF64(floatValue);\r\n      }\r\n      case LiteralKind.INTEGER: {\r\n        let intValue = (<IntegerLiteralExpression>expression).value;\r\n        if (implicitNegate) {\r\n          intValue = i64_sub(\r\n            i64_new(0),\r\n            intValue\r\n          );\r\n        }\r\n        switch (contextualType.kind) {\r\n\r\n          // compile to contextualType if matching\r\n\r\n          case TypeKind.I8: {\r\n            if (i64_is_i8(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.U8: {\r\n            if (i64_is_u8(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.I16: {\r\n            if (i64_is_i16(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.U16: {\r\n            if (i64_is_u16(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.I32: {\r\n            if (i64_is_i32(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.U32: {\r\n            if (i64_is_u32(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.BOOL: {\r\n            if (i64_is_bool(intValue)) return module.createI32(i64_low(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE: {\r\n            if (!this.options.isWasm64) {\r\n              if (i64_is_i32(intValue)) return module.createI32(i64_low(intValue));\r\n              break;\r\n            }\r\n            return module.createI64(i64_low(intValue), i64_high(intValue));\r\n          }\r\n          case TypeKind.USIZE: {\r\n            if (!this.options.isWasm64) {\r\n              if (i64_is_u32(intValue)) return module.createI32(i64_low(intValue));\r\n              break;\r\n            }\r\n            return module.createI64(i64_low(intValue), i64_high(intValue));\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            return module.createI64(i64_low(intValue), i64_high(intValue));\r\n          }\r\n          case TypeKind.F32: {\r\n            if (i64_is_f32(intValue)) return module.createF32(i64_to_f32(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            if (i64_is_f64(intValue)) return module.createF64(i64_to_f64(intValue));\r\n            break;\r\n          }\r\n          case TypeKind.VOID: {\r\n            break; // compiles to best fitting type below, being dropped\r\n          }\r\n          default: {\r\n            assert(false);\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n\r\n        // otherwise compile to best fitting native type\r\n\r\n        if (i64_is_i32(intValue)) {\r\n          this.currentType = Type.i32;\r\n          return module.createI32(i64_low(intValue));\r\n        } else if (i64_is_u32(intValue)) {\r\n          this.currentType = Type.u32;\r\n          return module.createI32(i64_low(intValue));\r\n        } else {\r\n          this.currentType = Type.i64;\r\n          return module.createI64(i64_low(intValue), i64_high(intValue));\r\n        }\r\n      }\r\n      case LiteralKind.STRING: {\r\n        assert(!implicitNegate);\r\n        return this.compileStringLiteral(<StringLiteralExpression>expression);\r\n      }\r\n      case LiteralKind.OBJECT: {\r\n        assert(!implicitNegate);\r\n        return this.compileObjectLiteral(<ObjectLiteralExpression>expression, contextualType);\r\n      }\r\n      // case LiteralKind.REGEXP:\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      expression.range\r\n    );\r\n    this.currentType = contextualType;\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  /** Ensures that the specified string exists in static memory and returns a pointer to it. */\r\n  ensureStaticString(stringValue: string): ExpressionRef {\r\n    var program = this.program;\r\n    var hasGC = program.hasGC;\r\n    var gcHeaderSize = program.gcHeaderSize;\r\n\r\n    var stringInstance = assert(program.stringInstance);\r\n    var stringSegment: MemorySegment;\r\n\r\n    // if the string already exists, reuse it\r\n    var segments = this.stringSegments;\r\n    if (segments.has(stringValue)) {\r\n      stringSegment = <MemorySegment>segments.get(stringValue);\r\n\r\n    // otherwise create it\r\n    } else {\r\n      let length = stringValue.length;\r\n      let headerSize = (stringInstance.currentMemoryOffset + 1) & ~1;\r\n      let totalSize = headerSize + length * 2;\r\n\r\n      let buf: Uint8Array;\r\n      let pos: u32;\r\n\r\n      if (hasGC) {\r\n        buf = new Uint8Array(gcHeaderSize + totalSize);\r\n        pos = gcHeaderSize;\r\n        writeI32(ensureGCHook(this, stringInstance), buf, program.gcHookOffset);\r\n      } else {\r\n        buf = new Uint8Array(totalSize);\r\n        pos = 0;\r\n      }\r\n      writeI32(length, buf, pos + stringInstance.offsetof(\"length\"));\r\n      pos += headerSize;\r\n      for (let i = 0; i < length; ++i) {\r\n        writeI16(stringValue.charCodeAt(i), buf, pos + (i << 1));\r\n      }\r\n      stringSegment = this.addMemorySegment(buf);\r\n      segments.set(stringValue, stringSegment);\r\n    }\r\n    var stringOffset = stringSegment.offset;\r\n    if (hasGC) stringOffset = i64_add(stringOffset, i64_new(gcHeaderSize));\r\n\r\n    this.currentType = stringInstance.type;\r\n    if (this.options.isWasm64) {\r\n      return this.module.createI64(i64_low(stringOffset), i64_high(stringOffset));\r\n    } else {\r\n      assert(i64_is_u32(stringOffset));\r\n      return this.module.createI32(i64_low(stringOffset));\r\n    }\r\n  }\r\n\r\n  compileStringLiteral(expression: StringLiteralExpression): ExpressionRef {\r\n    return this.ensureStaticString(expression.value);\r\n  }\r\n\r\n  /** Ensures that the specified array exists in static memory and returns a pointer to it. */\r\n  ensureStaticArray(elementType: Type, values: ExpressionRef[]): ExpressionRef {\r\n    var program = this.program;\r\n    var hasGC = program.hasGC;\r\n    var gcHeaderSize = program.gcHeaderSize;\r\n\r\n    var length = values.length;\r\n    var byteSize = elementType.byteSize;\r\n    var byteLength = length * byteSize;\r\n    var usizeTypeSize = this.options.usizeType.byteSize;\r\n\r\n    var buf: Uint8Array;\r\n    var pos: u32;\r\n\r\n    // create the backing ArrayBuffer segment\r\n    var bufferInstance = assert(program.arrayBufferInstance);\r\n    var bufferHeaderSize = (bufferInstance.currentMemoryOffset + 7) & ~7;\r\n    var bufferTotalSize = 1 << (32 - clz(bufferHeaderSize + byteLength - 1));\r\n    if (hasGC) {\r\n      buf = new Uint8Array(gcHeaderSize + bufferTotalSize);\r\n      pos = gcHeaderSize;\r\n      writeI32(ensureGCHook(this, bufferInstance), buf, program.gcHookOffset);\r\n    } else {\r\n      buf = new Uint8Array(bufferTotalSize);\r\n      pos = 0;\r\n    }\r\n    writeI32(byteLength, buf, pos + bufferInstance.offsetof(\"byteLength\"));\r\n    pos += bufferHeaderSize;\r\n    var nativeType = elementType.toNativeType();\r\n    switch (nativeType) {\r\n      case NativeType.I32: {\r\n        switch (byteSize) {\r\n          case 1: {\r\n            for (let i = 0; i < length; ++i) {\r\n              let value = values[i];\r\n              assert(getExpressionType(value) == nativeType);\r\n              assert(getExpressionId(value) == ExpressionId.Const);\r\n              writeI8(getConstValueI32(value), buf, pos);\r\n              pos += 1;\r\n            }\r\n            break;\r\n          }\r\n          case 2: {\r\n            for (let i = 0; i < length; ++i) {\r\n              let value = values[i];\r\n              assert(getExpressionType(value) == nativeType);\r\n              assert(getExpressionId(value) == ExpressionId.Const);\r\n              writeI16(getConstValueI32(value), buf, pos);\r\n              pos += 2;\r\n            }\r\n            break;\r\n          }\r\n          case 4: {\r\n            for (let i = 0; i < length; ++i) {\r\n              let value = values[i];\r\n              assert(getExpressionType(value) == nativeType);\r\n              assert(getExpressionId(value) == ExpressionId.Const);\r\n              writeI32(getConstValueI32(value), buf, pos);\r\n              pos += 4;\r\n            }\r\n            break;\r\n          }\r\n          default: assert(false);\r\n        }\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        for (let i = 0; i < length; ++i) {\r\n          let value = values[i];\r\n          assert(getExpressionType(value) == nativeType);\r\n          assert(getExpressionId(value) == ExpressionId.Const);\r\n          writeI64(i64_new(getConstValueI64Low(value), getConstValueI64High(value)), buf, pos);\r\n          pos += 8;\r\n        }\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        for (let i = 0; i < length; ++i) {\r\n          let value = values[i];\r\n          assert(getExpressionType(value) == nativeType);\r\n          assert(getExpressionId(value) == ExpressionId.Const);\r\n          writeF32(getConstValueF32(value), buf, pos);\r\n          pos += 4;\r\n        }\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        for (let i = 0; i < length; ++i) {\r\n          let value = values[i];\r\n          assert(getExpressionType(value) == nativeType);\r\n          assert(getExpressionId(value) == ExpressionId.Const);\r\n          writeF64(getConstValueF64(value), buf, pos);\r\n          pos += 8;\r\n        }\r\n        break;\r\n      }\r\n      default: assert(false);\r\n    }\r\n    var bufferSegment = this.addMemorySegment(buf);\r\n    var bufferOffset = bufferSegment.offset;\r\n    if (hasGC) bufferOffset = i64_add(bufferOffset, i64_new(gcHeaderSize));\r\n\r\n    // create the Array segment and return a pointer to it\r\n    var arrayPrototype = assert(program.arrayPrototype);\r\n    var arrayInstance = assert(this.resolver.resolveClass(arrayPrototype, [ elementType ]));\r\n    var arrayHeaderSize = (arrayInstance.currentMemoryOffset + 7) & ~7;\r\n    if (hasGC) {\r\n      buf = new Uint8Array(gcHeaderSize + arrayHeaderSize);\r\n      pos = gcHeaderSize;\r\n      writeI32(ensureGCHook(this, arrayInstance), buf, program.gcHookOffset);\r\n    } else {\r\n      buf = new Uint8Array(arrayHeaderSize);\r\n      pos = 0;\r\n    }\r\n    var arraySegment = this.addMemorySegment(buf);\r\n    var arrayOffset = arraySegment.offset;\r\n    if (hasGC) arrayOffset = i64_add(arrayOffset, i64_new(gcHeaderSize));\r\n    this.currentType = arrayInstance.type;\r\n    if (usizeTypeSize == 8) {\r\n      writeI64(bufferOffset, buf, pos + arrayInstance.offsetof(\"buffer_\"));\r\n      writeI32(length, buf, pos + arrayInstance.offsetof(\"length_\"));\r\n      return this.module.createI64(i64_low(arrayOffset), i64_high(arrayOffset));\r\n    } else {\r\n      assert(i64_is_u32(bufferOffset));\r\n      writeI32(i64_low(bufferOffset), buf, pos + arrayInstance.offsetof(\"buffer_\"));\r\n      writeI32(length, buf, pos + arrayInstance.offsetof(\"length_\"));\r\n      assert(i64_is_u32(arrayOffset));\r\n      return this.module.createI32(i64_low(arrayOffset));\r\n    }\r\n  }\r\n\r\n  compileArrayLiteral(\r\n    elementType: Type,\r\n    expressions: (Expression | null)[],\r\n    isConst: bool,\r\n    reportNode: Node\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    // find out whether all elements are constant (array is static)\r\n    var length = expressions.length;\r\n    var compiledValues = new Array<ExpressionRef>(length);\r\n    var constantValues = new Array<ExpressionRef>(length);\r\n    var nativeElementType = elementType.toNativeType();\r\n    var isStatic = true;\r\n    for (let i = 0; i < length; ++i) {\r\n      let expr = expressions[i]\r\n        ? this.compileExpression(<Expression>expressions[i], elementType, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n        : elementType.toNativeZero(module);\r\n      compiledValues[i] = expr;\r\n      if (isStatic) {\r\n        expr = module.precomputeExpression(compiledValues[i]);\r\n        if (getExpressionId(expr) == ExpressionId.Const) {\r\n          assert(getExpressionType(expr) == nativeElementType);\r\n          constantValues[i] = expr;\r\n        } else {\r\n          if (isConst) {\r\n            this.warning(\r\n              DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n              reportNode.range\r\n            );\r\n          }\r\n          isStatic = false;\r\n        }\r\n      }\r\n    }\r\n\r\n    // make a static array if possible\r\n    if (isStatic) return this.ensureStaticArray(elementType, constantValues);\r\n\r\n    // otherwise obtain the array type\r\n    var arrayPrototype = assert(this.program.arrayPrototype);\r\n    if (!arrayPrototype || arrayPrototype.kind != ElementKind.CLASS_PROTOTYPE) return module.createUnreachable();\r\n    var arrayInstance = this.resolver.resolveClass(<ClassPrototype>arrayPrototype, [ elementType ]);\r\n    if (!arrayInstance) return module.createUnreachable();\r\n    var arrayType = arrayInstance.type;\r\n\r\n    // and compile an explicit instantiation\r\n    this.currentType = arrayType;\r\n    var setter = arrayInstance.lookupOverload(OperatorKind.INDEXED_SET, true);\r\n    if (!setter) {\r\n      this.error(\r\n        DiagnosticCode.Index_signature_in_type_0_only_permits_reading,\r\n        reportNode.range, arrayInstance.internalName\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    var nativeArrayType = arrayType.toNativeType();\r\n    var currentFunction = this.currentFunction;\r\n    var tempLocal = currentFunction.getTempLocal(arrayType, false);\r\n    var stmts = new Array<ExpressionRef>(2 + length);\r\n    var index = 0;\r\n    stmts[index++] = module.createSetLocal(tempLocal.index,\r\n      this.makeCallDirect(assert(arrayInstance.constructorInstance), [\r\n        module.createI32(0), // this\r\n        module.createI32(length)\r\n      ])\r\n    );\r\n    for (let i = 0; i < length; ++i) {\r\n      stmts[index++] = this.makeCallDirect(setter, [\r\n        module.createGetLocal(tempLocal.index, nativeArrayType), // this\r\n        module.createI32(i),\r\n        compiledValues[i]\r\n      ]);\r\n    }\r\n    assert(index + 1 == stmts.length);\r\n    stmts[index] = module.createGetLocal(tempLocal.index, nativeArrayType);\r\n    currentFunction.freeTempLocal(tempLocal);\r\n    this.currentType = arrayType;\r\n    return module.createBlock(null, stmts, nativeArrayType);\r\n  }\r\n\r\n  compileObjectLiteral(expression: ObjectLiteralExpression, contextualType: Type): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    // contextual type must be a class\r\n    var classReference = contextualType.classReference;\r\n    if (!classReference || classReference.is(CommonFlags.ABSTRACT)) {\r\n      this.error(\r\n        DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n        expression.range, \"<object>\", contextualType.toString()\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n\r\n    // if present, check that the constructor is compatible with object literals\r\n    var ctor = classReference.constructorInstance;\r\n    if (ctor) {\r\n      if (ctor.signature.requiredParameters) {\r\n        this.error(\r\n          DiagnosticCode.Constructor_of_class_0_must_not_require_any_arguments,\r\n          expression.range, classReference.toString()\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (ctor.is(CommonFlags.PRIVATE)) {\r\n        this.error(\r\n          DiagnosticCode.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration,\r\n          expression.range, classReference.toString()\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (ctor.is(CommonFlags.PROTECTED)) {\r\n        this.error(\r\n          DiagnosticCode.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration,\r\n          expression.range, classReference.toString()\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // check and compile field values\r\n    var names = expression.names;\r\n    var numNames = names.length;\r\n    var values = expression.values;\r\n    var members = classReference.members;\r\n    var hasErrors = false;\r\n    var exprs = new Array<ExpressionRef>(numNames + 2);\r\n    var tempLocal = this.currentFunction.getTempLocal(this.options.usizeType);\r\n    assert(numNames == values.length);\r\n    for (let i = 0, k = numNames; i < k; ++i) {\r\n      let member = members ? members.get(names[i].text) : null;\r\n      if (!member || member.kind != ElementKind.FIELD) {\r\n        this.error(\r\n          DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n          names[i].range, names[i].text, classReference.toString()\r\n        );\r\n        hasErrors = true;\r\n        continue;\r\n      }\r\n      let type = (<Field>member).type;\r\n      exprs[i + 1] = this.module.createStore( // TODO: handle setters as well\r\n        type.byteSize,\r\n        this.module.createGetLocal(tempLocal.index, this.options.nativeSizeType),\r\n        this.compileExpression(values[i], (<Field>member).type, ConversionKind.IMPLICIT, WrapMode.NONE),\r\n        type.toNativeType(),\r\n        (<Field>member).memoryOffset\r\n      );\r\n    }\r\n    this.currentType = classReference.type.nonNullableType;\r\n    if (hasErrors) return module.createUnreachable();\r\n\r\n    // allocate a new instance first and assign 'this' to the temp. local\r\n    exprs[0] = module.createSetLocal(\r\n      tempLocal.index,\r\n      compileAllocate(this, classReference, expression)\r\n    );\r\n\r\n    // once all field values have been set, return 'this'\r\n    exprs[exprs.length - 1] = module.createGetLocal(tempLocal.index, this.options.nativeSizeType);\r\n\r\n    return module.createBlock(null, exprs, this.options.nativeSizeType);\r\n  }\r\n\r\n  compileNewExpression(expression: NewExpression, contextualType: Type): ExpressionRef {\r\n    var module = this.module;\r\n    var options = this.options;\r\n    var currentFunction = this.currentFunction;\r\n\r\n    // obtain the class being instantiated\r\n    var target = this.resolver.resolveExpression( // reports\r\n      expression.expression,\r\n      currentFunction\r\n    );\r\n    if (!target) return module.createUnreachable();\r\n    if (target.kind != ElementKind.CLASS_PROTOTYPE) {\r\n      this.error(\r\n        DiagnosticCode.Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature,\r\n        expression.expression.range\r\n      );\r\n      return this.module.createUnreachable();\r\n    }\r\n    var classPrototype = <ClassPrototype>target;\r\n    var classInstance: Class | null = null;\r\n    var typeArguments = expression.typeArguments;\r\n    var classReference: Class | null;\r\n    if (\r\n      !typeArguments &&\r\n      (classReference = contextualType.classReference) !== null &&\r\n      classReference.is(CommonFlags.GENERIC)\r\n    ) {\r\n      classInstance = this.resolver.resolveClass(\r\n        classPrototype,\r\n        classReference.typeArguments,\r\n        currentFunction.flow.contextualTypeArguments\r\n      );\r\n    } else {\r\n      classInstance = this.resolver.resolveClassInclTypeArguments(\r\n        classPrototype,\r\n        typeArguments,\r\n        currentFunction.flow.contextualTypeArguments,\r\n        expression\r\n      );\r\n    }\r\n    if (!classInstance) return module.createUnreachable();\r\n\r\n    var expr: ExpressionRef;\r\n\r\n    // traverse to the top-most visible constructor\r\n    var currentClassInstance: Class | null = classInstance;\r\n    var constructorInstance: Function | null = null;\r\n    do {\r\n      constructorInstance = currentClassInstance.constructorInstance;\r\n      if (constructorInstance) break; // TODO: check visibility\r\n    } while (currentClassInstance = currentClassInstance.base);\r\n\r\n    // if a constructor is present, call it with a zero `this`\r\n    if (constructorInstance) {\r\n      expr = this.compileCallDirect(constructorInstance, expression.arguments, expression,\r\n        options.usizeType.toNativeZero(module)\r\n      );\r\n\r\n    // otherwise simply allocate a new instance and initialize its fields\r\n    } else {\r\n      expr = this.makeAllocate(classInstance, expression);\r\n    }\r\n\r\n    this.currentType = classInstance.type;\r\n    return expr;\r\n  }\r\n\r\n  compileParenthesizedExpression(\r\n    expression: ParenthesizedExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    // does not change types, just order\r\n    return this.compileExpression(\r\n      expression.expression,\r\n      contextualType,\r\n      ConversionKind.NONE,\r\n      WrapMode.NONE\r\n    );\r\n  }\r\n\r\n  /**\r\n   * Compiles a property access in the specified context.\r\n   * @param retainConstantType Retains the type of inlined constants if `true`, otherwise\r\n   *  precomputes them according to context.\r\n   */\r\n  compilePropertyAccessExpression(\r\n    propertyAccess: PropertyAccessExpression,\r\n    contextualType: Type,\r\n    retainConstantType: bool\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n\r\n    var target = this.resolver.resolvePropertyAccess(propertyAccess, this.currentFunction); // reports\r\n    if (!target) return module.createUnreachable();\r\n\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL: { // static property\r\n        if (!this.compileGlobal(<Global>target)) { // reports; not yet compiled if a static field\r\n          return module.createUnreachable();\r\n        }\r\n        let globalType = (<Global>target).type;\r\n        assert(globalType != Type.void);\r\n        if ((<Global>target).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Global>target, contextualType, retainConstantType);\r\n        }\r\n        this.currentType = globalType;\r\n        return module.createGetGlobal((<Global>target).internalName, globalType.toNativeType());\r\n      }\r\n      case ElementKind.ENUMVALUE: { // enum value\r\n        let parent = (<EnumValue>target).parent;\r\n        assert(parent !== null && parent.kind == ElementKind.ENUM);\r\n        if (!this.compileEnum(<Enum>parent)) {\r\n          this.currentType = Type.i32;\r\n          return this.module.createUnreachable();\r\n        }\r\n        this.currentType = Type.i32;\r\n        if ((<EnumValue>target).is(CommonFlags.INLINED)) {\r\n          return module.createI32((<EnumValue>target).constantValue);\r\n        }\r\n        return module.createGetGlobal((<EnumValue>target).internalName, NativeType.I32);\r\n      }\r\n      case ElementKind.FIELD: { // instance field\r\n        let thisExpression = assert(this.resolver.currentThisExpression);\r\n        assert((<Field>target).memoryOffset >= 0);\r\n        let thisExpr = this.compileExpressionRetainType(\r\n          thisExpression,\r\n          this.options.usizeType,\r\n          WrapMode.NONE\r\n        );\r\n        this.currentType = (<Field>target).type;\r\n        return module.createLoad(\r\n          (<Field>target).type.byteSize,\r\n          (<Field>target).type.is(TypeFlags.SIGNED | TypeFlags.INTEGER),\r\n          thisExpr,\r\n          (<Field>target).type.toNativeType(),\r\n          (<Field>target).memoryOffset\r\n        );\r\n      }\r\n      case ElementKind.PROPERTY: {// instance property (here: getter)\r\n        return this.compileGetter(<Property>target, propertyAccess);\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        this.error(\r\n          DiagnosticCode.Cannot_access_method_0_without_calling_it_as_it_requires_this_to_be_set,\r\n          propertyAccess.range, (<FunctionPrototype>target).simpleName\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Operation_not_supported,\r\n      propertyAccess.range\r\n    );\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  private compileGetter(target: Property, reportNode: Node): ExpressionRef {\r\n    var prototype = target.getterPrototype;\r\n    if (prototype) {\r\n      let instance = this.resolver.resolveFunction(prototype, null);\r\n      if (!instance) return this.module.createUnreachable();\r\n      let signature = instance.signature;\r\n      if (!this.checkCallSignature( // reports\r\n        signature,\r\n        0,\r\n        instance.is(CommonFlags.INSTANCE),\r\n        reportNode\r\n      )) {\r\n        return this.module.createUnreachable();\r\n      }\r\n      let inline = (instance.decoratorFlags & DecoratorFlags.INLINE) != 0;\r\n      if (instance.is(CommonFlags.INSTANCE)) {\r\n        let parent = assert(instance.parent);\r\n        assert(parent.kind == ElementKind.CLASS);\r\n        let thisExpression = assert(this.resolver.currentThisExpression); //!!!\r\n        let thisExpr = this.compileExpressionRetainType(\r\n          thisExpression,\r\n          this.options.usizeType,\r\n          WrapMode.NONE\r\n        );\r\n        this.currentType = signature.returnType;\r\n        return this.compileCallDirect(instance, [], reportNode, thisExpr, inline);\r\n      } else {\r\n        this.currentType = signature.returnType;\r\n        return this.compileCallDirect(instance, [], reportNode, 0, inline);\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n        reportNode.range, (<Property>target).simpleName, (<Property>target).parent.toString()\r\n      );\r\n      return this.module.createUnreachable();\r\n    }\r\n  }\r\n\r\n  compileTernaryExpression(expression: TernaryExpression, contextualType: Type): ExpressionRef {\r\n    var ifThen = expression.ifThen;\r\n    var ifElse = expression.ifElse;\r\n    var currentFunction = this.currentFunction;\r\n    var parentFlow = currentFunction.flow;\r\n\r\n    var condExpr = this.makeIsTrueish(\r\n      this.compileExpressionRetainType(expression.condition, Type.bool, WrapMode.NONE),\r\n      this.currentType\r\n    );\r\n\r\n    if (\r\n      !this.options.noTreeShaking ||\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT)\r\n    ) {\r\n      // Try to eliminate unnecesssary branches if the condition is constant\r\n      let condExprPrecomp = this.module.precomputeExpression(condExpr);\r\n      if (\r\n        getExpressionId(condExprPrecomp) == ExpressionId.Const &&\r\n        getExpressionType(condExprPrecomp) == NativeType.I32\r\n      ) {\r\n        return getConstValueI32(condExprPrecomp)\r\n          ? this.compileExpressionRetainType(ifThen, contextualType, WrapMode.NONE)\r\n          : this.compileExpressionRetainType(ifElse, contextualType, WrapMode.NONE);\r\n\r\n      // Otherwise recompile to the original and let the optimizer decide\r\n      } else /* if (condExpr != condExprPrecomp) <- not guaranteed */ {\r\n        condExpr = this.makeIsTrueish(\r\n          this.compileExpressionRetainType(expression.condition, Type.bool, WrapMode.NONE),\r\n          this.currentType\r\n        );\r\n      }\r\n    }\r\n\r\n    var ifThenFlow = parentFlow.fork();\r\n    currentFunction.flow = ifThenFlow;\r\n    var ifThenExpr = this.compileExpressionRetainType(ifThen, contextualType, WrapMode.NONE);\r\n    var ifThenType = this.currentType;\r\n    ifThenFlow.free();\r\n\r\n    var ifElseFlow = parentFlow.fork();\r\n    currentFunction.flow = ifElseFlow;\r\n    var ifElseExpr = this.compileExpressionRetainType(ifElse, contextualType, WrapMode.NONE);\r\n    var ifElseType = this.currentType;\r\n    currentFunction.flow = ifElseFlow.free();\r\n\r\n    parentFlow.inheritMutual(ifThenFlow, ifElseFlow);\r\n\r\n    var commonType = Type.commonCompatible(ifThenType, ifElseType, false);\r\n    if (!commonType) {\r\n      this.error(\r\n        DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n        expression.range, ifThenType.toString(), ifElseType.toString()\r\n      );\r\n      this.currentType = contextualType;\r\n      return this.module.createUnreachable();\r\n    }\r\n    ifThenExpr = this.convertExpression(\r\n      ifThenExpr,\r\n      ifThenType,\r\n      commonType,\r\n      ConversionKind.IMPLICIT,\r\n      WrapMode.NONE,\r\n      ifThen\r\n    );\r\n    ifElseExpr = this.convertExpression(\r\n      ifElseExpr,\r\n      ifElseType,\r\n      commonType,\r\n      ConversionKind.IMPLICIT,\r\n      WrapMode.NONE,\r\n      ifElse\r\n    );\r\n    this.currentType = commonType;\r\n    return this.module.createIf(condExpr, ifThenExpr, ifElseExpr);\r\n  }\r\n\r\n  compileUnaryPostfixExpression(expression: UnaryPostfixExpression, contextualType: Type): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n\r\n    // make a getter for the expression (also obtains the type)\r\n    var getValue = this.compileExpression( // reports\r\n      expression.operand,\r\n      contextualType == Type.void\r\n        ? Type.i32\r\n        : contextualType,\r\n      ConversionKind.NONE,\r\n      WrapMode.NONE\r\n    );\r\n    // shortcut if compiling the getter already failed\r\n    if (getExpressionId(getValue) == ExpressionId.Unreachable) return getValue;\r\n    var currentType = this.currentType;\r\n\r\n    var op: BinaryOp;\r\n    var nativeType: NativeType;\r\n    var nativeOne: ExpressionRef;\r\n\r\n    switch (expression.operator) {\r\n      case Token.PLUS_PLUS: {\r\n\r\n        // TODO: check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        switch (currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            op = BinaryOp.AddI32;\r\n            nativeType = NativeType.I32;\r\n            nativeOne = module.createI32(1);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: // TODO: check operator overload\r\n          case TypeKind.ISIZE: {\r\n            let options = this.options;\r\n            op = options.isWasm64\r\n              ? BinaryOp.AddI64\r\n              : BinaryOp.AddI32;\r\n            nativeType = options.nativeSizeType;\r\n            nativeOne = currentType.toNativeOne(module);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            op = BinaryOp.AddI64;\r\n            nativeType = NativeType.I64;\r\n            nativeOne = module.createI64(1);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            op = BinaryOp.AddF32;\r\n            nativeType = NativeType.F32;\r\n            nativeOne = module.createF32(1);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            op = BinaryOp.AddF64;\r\n            nativeType = NativeType.F64;\r\n            nativeOne = module.createF64(1);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.MINUS_MINUS: {\r\n\r\n        // TODO: check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return this.module.createUnreachable();\r\n        }\r\n\r\n        switch (currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            op = BinaryOp.SubI32;\r\n            nativeType = NativeType.I32;\r\n            nativeOne = module.createI32(1);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: // TODO: check operator overload\r\n          case TypeKind.ISIZE: {\r\n            let options = this.options;\r\n            op = options.isWasm64\r\n              ? BinaryOp.SubI64\r\n              : BinaryOp.SubI32;\r\n            nativeType = options.nativeSizeType;\r\n            nativeOne = currentType.toNativeOne(module);\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            op = BinaryOp.SubI64;\r\n            nativeType = NativeType.I64;\r\n            nativeOne = module.createI64(1);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            op = BinaryOp.SubF32;\r\n            nativeType = NativeType.F32;\r\n            nativeOne = module.createF32(1);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            op = BinaryOp.SubF64;\r\n            nativeType = NativeType.F64;\r\n            nativeOne = module.createF64(1);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            return module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // simplify if dropped anyway\r\n    if (contextualType == Type.void) {\r\n      return this.compileAssignmentWithValue(expression.operand,\r\n        module.createBinary(op,\r\n          getValue,\r\n          nativeOne\r\n        ),\r\n        false\r\n      );\r\n    }\r\n\r\n    // otherwise use a temp local for the intermediate value (always possibly overflows)\r\n    var tempLocal = currentFunction.getTempLocal(currentType, false);\r\n    var setValue = this.compileAssignmentWithValue(expression.operand,\r\n      module.createBinary(op,\r\n        this.module.createGetLocal(tempLocal.index, nativeType),\r\n        nativeOne\r\n      ),\r\n      false\r\n    );\r\n    this.currentType = assert(tempLocal).type;\r\n    currentFunction.freeTempLocal(<Local>tempLocal);\r\n\r\n    var localIndex = (<Local>tempLocal).index;\r\n    return module.createBlock(null, [\r\n      module.createSetLocal(localIndex, getValue),\r\n      setValue,\r\n      module.createGetLocal(localIndex, nativeType)\r\n    ], nativeType); // result of 'x++' / 'x--' might overflow\r\n  }\r\n\r\n  compileUnaryPrefixExpression(\r\n    expression: UnaryPrefixExpression,\r\n    contextualType: Type\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var compound = false;\r\n    var expr: ExpressionRef;\r\n\r\n    switch (expression.operator) {\r\n      case Token.PLUS: {\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.PLUS);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n\r\n        // nop\r\n        break;\r\n      }\r\n      case Token.MINUS: {\r\n        if (expression.operand.kind == NodeKind.LITERAL && (\r\n          (<LiteralExpression>expression.operand).literalKind == LiteralKind.INTEGER ||\r\n          (<LiteralExpression>expression.operand).literalKind == LiteralKind.FLOAT\r\n        )) {\r\n          // implicitly negate integer and float literals. also enables proper checking of literal ranges.\r\n          expr = this.compileLiteralExpression(<LiteralExpression>expression.operand, contextualType, true);\r\n          // compileExpression normally does this:\r\n          if (this.options.sourceMap) this.addDebugLocation(expr, expression.range);\r\n          break;\r\n        }\r\n\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.MINUS);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.SubI32, module.createI32(0), expr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.SubI64\r\n                : BinaryOp.SubI32,\r\n              this.currentType.toNativeZero(module),\r\n              expr\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.SubI64, module.createI64(0), expr);\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createUnary(UnaryOp.NegF32, expr);\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createUnary(UnaryOp.NegF64, expr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.PLUS_PLUS: {\r\n        compound = true;\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.PREFIX_INC);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.AddI32, expr, this.module.createI32(1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.AddI64\r\n                : BinaryOp.AddI32,\r\n              expr,\r\n              this.currentType.toNativeOne(module)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.AddI64, expr, module.createI64(1));\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.AddF32, expr, module.createF32(1));\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.AddF64, expr, module.createF64(1));\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.MINUS_MINUS: {\r\n        compound = true;\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.PREFIX_DEC);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.SubI32, expr, module.createI32(1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.SubI64\r\n                : BinaryOp.SubI32,\r\n              expr,\r\n              this.currentType.toNativeOne(module)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.SubI64, expr, module.createI64(1));\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            expr = module.createBinary(BinaryOp.SubF32, expr, module.createF32(1));\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            expr = module.createBinary(BinaryOp.SubF64, expr, module.createF64(1));\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.EXCLAMATION: {\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.NOT);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          // allow '!' for references even without an overload\r\n        }\r\n\r\n        expr = this.makeIsFalseish(expr, this.currentType);\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.TILDE: {\r\n        expr = this.compileExpression(\r\n          expression.operand,\r\n          contextualType == Type.void\r\n            ? Type.i32\r\n            : contextualType.is(TypeFlags.FLOAT)\r\n              ? Type.i64\r\n              : contextualType,\r\n          ConversionKind.NONE,\r\n          WrapMode.NONE\r\n        );\r\n\r\n        // check operator overload\r\n        if (this.currentType.is(TypeFlags.REFERENCE)) {\r\n          let classReference = this.currentType.classReference;\r\n          if (classReference) {\r\n            let overload = classReference.lookupOverload(OperatorKind.BITWISE_NOT);\r\n            if (overload) {\r\n              expr = this.compileUnaryOverload(overload, expression.operand, expr, expression);\r\n              break;\r\n            }\r\n          }\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            expression.range\r\n          );\r\n          return module.createUnreachable();\r\n        } else {\r\n          expr = this.convertExpression(\r\n            expr,\r\n            this.currentType, this.currentType.intType,\r\n            ConversionKind.IMPLICIT, WrapMode.NONE,\r\n            expression.operand\r\n          );\r\n        }\r\n\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.I32:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.XorI32, expr, module.createI32(-1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE:\r\n          case TypeKind.ISIZE: {\r\n            expr = module.createBinary(\r\n              this.options.isWasm64\r\n                ? BinaryOp.XorI64\r\n                : BinaryOp.XorI32,\r\n              expr,\r\n              this.currentType.toNativeNegOne(module)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            expr = module.createBinary(BinaryOp.XorI64, expr, module.createI64(-1, -1));\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            expr = module.createUnreachable();\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.TYPEOF: {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n    return compound\r\n      ? this.compileAssignmentWithValue(expression.operand, expr, contextualType != Type.void)\r\n      : expr;\r\n  }\r\n\r\n  /** Makes sure that a 32-bit integer value is wrapped to a valid value of the specified type. */\r\n  ensureSmallIntegerWrap(expr: ExpressionRef, type: Type): ExpressionRef {\r\n    var module = this.module;\r\n    var flow = this.currentFunction.flow;\r\n    switch (type.kind) {\r\n      case TypeKind.I8: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = this.options.hasFeature(Feature.SIGN_EXTENSION)\r\n            ? module.createUnary(UnaryOp.ExtendI8ToI32, expr)\r\n            : module.createBinary(BinaryOp.ShrI32,\r\n                module.createBinary(BinaryOp.ShlI32,\r\n                  expr,\r\n                  module.createI32(24)\r\n                ),\r\n                module.createI32(24)\r\n              );\r\n        }\r\n        break;\r\n      }\r\n      case TypeKind.I16: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = this.options.hasFeature(Feature.SIGN_EXTENSION)\r\n            ? module.createUnary(UnaryOp.ExtendI16ToI32, expr)\r\n            : module.createBinary(BinaryOp.ShrI32,\r\n                module.createBinary(BinaryOp.ShlI32,\r\n                  expr,\r\n                  module.createI32(16)\r\n                ),\r\n                module.createI32(16)\r\n              );\r\n        }\r\n        break;\r\n      }\r\n      case TypeKind.U8: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = module.createBinary(BinaryOp.AndI32,\r\n            expr,\r\n            module.createI32(0xff)\r\n          );\r\n        }\r\n        break;\r\n      }\r\n      case TypeKind.U16: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = module.createBinary(BinaryOp.AndI32,\r\n            expr,\r\n            module.createI32(0xffff)\r\n          );\r\n        }\r\n        break;\r\n      }\r\n      case TypeKind.BOOL: {\r\n        if (flow.canOverflow(expr, type)) {\r\n          expr = module.createBinary(BinaryOp.AndI32,\r\n            expr,\r\n            module.createI32(0x1)\r\n          );\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  /** Creates a comparison whether an expression is 'false' in a broader sense. */\r\n  makeIsFalseish(expr: ExpressionRef, type: Type): ExpressionRef {\r\n    var module = this.module;\r\n    switch (type.kind) {\r\n      case TypeKind.I8:\r\n      case TypeKind.I16:\r\n      case TypeKind.U8:\r\n      case TypeKind.U16:\r\n      case TypeKind.BOOL: {\r\n        expr = this.ensureSmallIntegerWrap(expr, type);\r\n        // fall-through\r\n      }\r\n      case TypeKind.I32:\r\n      case TypeKind.U32: {\r\n        return module.createUnary(UnaryOp.EqzI32, expr);\r\n      }\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: {\r\n        return module.createUnary(UnaryOp.EqzI64, expr);\r\n      }\r\n      case TypeKind.USIZE: // TODO: strings?\r\n      case TypeKind.ISIZE: {\r\n        return module.createUnary(type.size == 64 ? UnaryOp.EqzI64 : UnaryOp.EqzI32, expr);\r\n      }\r\n      case TypeKind.F32: {\r\n        return module.createBinary(BinaryOp.EqF32, expr, module.createF32(0));\r\n      }\r\n      case TypeKind.F64: {\r\n        return module.createBinary(BinaryOp.EqF64, expr, module.createF64(0));\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return module.createI32(1);\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Creates a comparison whether an expression is 'true' in a broader sense. */\r\n  makeIsTrueish(expr: ExpressionRef, type: Type): ExpressionRef {\r\n    var module = this.module;\r\n    switch (type.kind) {\r\n      case TypeKind.I8:\r\n      case TypeKind.I16:\r\n      case TypeKind.U8:\r\n      case TypeKind.U16:\r\n      case TypeKind.BOOL: {\r\n        expr = this.ensureSmallIntegerWrap(expr, type);\r\n        // fall-through\r\n      }\r\n      case TypeKind.I32:\r\n      case TypeKind.U32: {\r\n        return expr;\r\n      }\r\n      case TypeKind.I64:\r\n      case TypeKind.U64: {\r\n        return module.createBinary(BinaryOp.NeI64, expr, module.createI64(0));\r\n      }\r\n      case TypeKind.USIZE: // TODO: strings?\r\n      case TypeKind.ISIZE: {\r\n        return type.size == 64\r\n          ? module.createBinary(BinaryOp.NeI64, expr, module.createI64(0))\r\n          : expr;\r\n      }\r\n      case TypeKind.F32: {\r\n        return module.createBinary(BinaryOp.NeF32, expr, module.createF32(0));\r\n      }\r\n      case TypeKind.F64: {\r\n        return module.createBinary(BinaryOp.NeF64, expr, module.createF64(0));\r\n      }\r\n      default: {\r\n        assert(false);\r\n        return module.createI32(0);\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Makes an allocation expression for an instance of the specified class. */\r\n  makeAllocate(classInstance: Class, reportNode: Node): ExpressionRef {\r\n    var module = this.module;\r\n    var currentFunction = this.currentFunction;\r\n    var nativeSizeType = this.options.nativeSizeType;\r\n\r\n    // allocate the necessary memory and tee the pointer to a temp. local for reuse\r\n    var tempLocal = currentFunction.getTempLocal(classInstance.type, false);\r\n    var initializers = new Array<ExpressionRef>();\r\n    initializers.push(\r\n      module.createSetLocal(tempLocal.index,\r\n        compileAllocate(this, classInstance, reportNode)\r\n      )\r\n    );\r\n\r\n    // apply field initializers\r\n    if (classInstance.members) {\r\n      for (let member of classInstance.members.values()) {\r\n        if (member.kind == ElementKind.FIELD) {\r\n          let field = <Field>member;\r\n          let fieldType = field.type;\r\n          let nativeFieldType = fieldType.toNativeType();\r\n          let fieldDeclaration = field.prototype.declaration;\r\n          assert(!field.isAny(CommonFlags.CONST));\r\n          if (fieldDeclaration.initializer) { // use initializer\r\n            initializers.push(module.createStore(fieldType.byteSize,\r\n              module.createGetLocal(tempLocal.index, nativeSizeType),\r\n              this.compileExpression( // reports\r\n                fieldDeclaration.initializer,\r\n                fieldType,\r\n                ConversionKind.IMPLICIT,\r\n                WrapMode.NONE\r\n              ),\r\n              nativeFieldType,\r\n              field.memoryOffset\r\n            ));\r\n          } else { // initialize with zero\r\n            // TODO: might be unnecessary if the ctor initializes the field\r\n            let parameterIndex = (<FieldDeclaration>field.prototype.declaration).parameterIndex;\r\n            initializers.push(module.createStore(fieldType.byteSize,\r\n              module.createGetLocal(tempLocal.index, nativeSizeType),\r\n              parameterIndex >= 0 // initialized via parameter\r\n                ? module.createGetLocal(1 + parameterIndex, nativeFieldType)\r\n                : fieldType.toNativeZero(module),\r\n                nativeFieldType,\r\n              field.memoryOffset\r\n            ));\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    // return `this`\r\n    initializers.push(\r\n      module.createGetLocal(tempLocal.index, nativeSizeType)\r\n    );\r\n\r\n    currentFunction.freeTempLocal(tempLocal);\r\n    this.currentType = classInstance.type;\r\n    return module.createBlock(null, initializers, nativeSizeType);\r\n  }\r\n\r\n  /** Makes a conditional allocation expression inside of the constructor of the specified class. */\r\n  makeConditionalAllocate(classInstance: Class, reportNode: Node): ExpressionRef {\r\n    // requires that `this` is the first local\r\n    var module = this.module;\r\n    var nativeSizeType = this.options.nativeSizeType;\r\n    this.currentType = classInstance.type;\r\n    return module.createIf(\r\n      nativeSizeType == NativeType.I64\r\n        ? module.createBinary(\r\n            BinaryOp.NeI64,\r\n            module.createGetLocal(0, NativeType.I64),\r\n            module.createI64(0)\r\n          )\r\n        : module.createGetLocal(0, NativeType.I32),\r\n      module.createGetLocal(0, nativeSizeType),\r\n      module.createTeeLocal(0,\r\n        this.makeAllocate(classInstance, reportNode)\r\n      )\r\n    );\r\n  }\r\n\r\n  /** Adds the debug location of the specified expression at the specified range to the source map. */\r\n  addDebugLocation(expr: ExpressionRef, range: Range): void {\r\n    var currentFunction = this.currentFunction;\r\n    var source = range.source;\r\n    if (source.debugInfoIndex < 0) source.debugInfoIndex = this.module.addDebugInfoFile(source.normalizedPath);\r\n    range.debugInfoRef = expr;\r\n    currentFunction.debugLocations.push(range);\r\n  }\r\n}\r\n\r\n// helpers\r\n\r\nfunction mangleImportName(\r\n  element: Element,\r\n  declaration: DeclarationStatement,\r\n  parentElement: Element | null = null\r\n): void {\r\n  mangleImportName_moduleName = parentElement ? parentElement.simpleName : declaration.range.source.simplePath;\r\n  mangleImportName_elementName = element.simpleName;\r\n\r\n  if (!element.hasDecorator(DecoratorFlags.EXTERNAL)) return;\r\n\r\n  var program = element.program;\r\n  var decorator = assert(findDecorator(DecoratorKind.EXTERNAL, declaration.decorators));\r\n  var args = decorator.arguments;\r\n  if (args && args.length) {\r\n    let arg = args[0];\r\n    if (arg.kind == NodeKind.LITERAL && (<LiteralExpression>arg).literalKind == LiteralKind.STRING) {\r\n      mangleImportName_elementName = (<StringLiteralExpression>arg).value;\r\n      if (args.length >= 2) {\r\n        arg = args[1];\r\n        if (arg.kind == NodeKind.LITERAL && (<LiteralExpression>arg).literalKind == LiteralKind.STRING) {\r\n          mangleImportName_moduleName = mangleImportName_elementName;\r\n          mangleImportName_elementName = (<StringLiteralExpression>arg).value;\r\n          if (args.length > 2) {\r\n            program.error(\r\n              DiagnosticCode.Expected_0_arguments_but_got_1,\r\n              decorator.range, \"2\", args.length.toString()\r\n            );\r\n          }\r\n        } else {\r\n          program.error(\r\n            DiagnosticCode.String_literal_expected,\r\n            arg.range\r\n          );\r\n        }\r\n      }\r\n    } else {\r\n      program.error(\r\n        DiagnosticCode.String_literal_expected,\r\n        arg.range\r\n      );\r\n    }\r\n  } else {\r\n    program.error(\r\n      DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n      decorator.range, \"1\", \"0\"\r\n    );\r\n  }\r\n}\r\n\r\nvar mangleImportName_moduleName: string;\r\nvar mangleImportName_elementName: string;\r\n","/**\r\n * Generated from diagnosticsMessages.json. Do not edit.\r\n * @module diagnostics\r\n *//***/\r\n\r\n/* tslint:disable:max-line-length */\r\n\r\n/** Enum of available diagnostic codes. */\r\nexport enum DiagnosticCode {\r\n  Operation_not_supported = 100,\r\n  Operation_is_unsafe = 101,\r\n  User_defined_0 = 102,\r\n  Conversion_from_type_0_to_1_requires_an_explicit_cast = 200,\r\n  Conversion_from_type_0_to_1_will_require_an_explicit_cast_when_switching_between_32_64_bit = 201,\r\n  Type_0_cannot_be_changed_to_type_1 = 202,\r\n  Type_0_cannot_be_reinterpreted_as_type_1 = 203,\r\n  Basic_type_0_cannot_be_nullable = 204,\r\n  Cannot_export_a_mutable_global = 205,\r\n  Compiling_constant_with_non_constant_initializer_as_mutable = 206,\r\n  Unmanaged_classes_cannot_extend_managed_classes_and_vice_versa = 207,\r\n  Unmanaged_classes_cannot_implement_interfaces = 208,\r\n  Invalid_regular_expression_flags = 209,\r\n  Implementation_0_must_match_the_signature_1 = 210,\r\n  Class_0_is_sealed_and_cannot_be_extended = 211,\r\n  Decorator_0_is_not_valid_here = 212,\r\n  Duplicate_decorator = 213,\r\n  An_allocator_must_be_declared_to_allocate_memory_Try_importing_allocator_arena_or_allocator_tlsf = 214,\r\n  Optional_parameter_must_have_an_initializer = 215,\r\n  Constructor_of_class_0_must_not_require_any_arguments = 216,\r\n  Function_0_cannot_be_inlined_into_itself = 217,\r\n  Cannot_access_method_0_without_calling_it_as_it_requires_this_to_be_set = 218,\r\n  Unterminated_string_literal = 1002,\r\n  Identifier_expected = 1003,\r\n  _0_expected = 1005,\r\n  A_file_cannot_have_a_reference_to_itself = 1006,\r\n  Trailing_comma_not_allowed = 1009,\r\n  Unexpected_token = 1012,\r\n  A_rest_parameter_must_be_last_in_a_parameter_list = 1014,\r\n  Parameter_cannot_have_question_mark_and_initializer = 1015,\r\n  A_required_parameter_cannot_follow_an_optional_parameter = 1016,\r\n  Statements_are_not_allowed_in_ambient_contexts = 1036,\r\n  Initializers_are_not_allowed_in_ambient_contexts = 1039,\r\n  _0_modifier_cannot_be_used_here = 1042,\r\n  A_rest_parameter_cannot_be_optional = 1047,\r\n  A_rest_parameter_cannot_have_an_initializer = 1048,\r\n  A_set_accessor_must_have_exactly_one_parameter = 1049,\r\n  A_set_accessor_parameter_cannot_have_an_initializer = 1052,\r\n  A_get_accessor_cannot_have_parameters = 1054,\r\n  Enum_member_must_have_initializer = 1061,\r\n  Type_parameters_cannot_appear_on_a_constructor_declaration = 1092,\r\n  Type_annotation_cannot_appear_on_a_constructor_declaration = 1093,\r\n  An_accessor_cannot_have_type_parameters = 1094,\r\n  A_set_accessor_cannot_have_a_return_type_annotation = 1095,\r\n  Type_parameter_list_cannot_be_empty = 1098,\r\n  A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement = 1104,\r\n  A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement = 1105,\r\n  A_return_statement_can_only_be_used_within_a_function_body = 1108,\r\n  Expression_expected = 1109,\r\n  Type_expected = 1110,\r\n  A_default_clause_cannot_appear_more_than_once_in_a_switch_statement = 1113,\r\n  Duplicate_label_0 = 1114,\r\n  Octal_literals_are_not_allowed_in_strict_mode = 1121,\r\n  Digit_expected = 1124,\r\n  Hexadecimal_digit_expected = 1125,\r\n  Unexpected_end_of_text = 1126,\r\n  Invalid_character = 1127,\r\n  _case_or_default_expected = 1130,\r\n  A_declare_modifier_cannot_be_used_in_an_already_ambient_context = 1038,\r\n  Type_argument_expected = 1140,\r\n  String_literal_expected = 1141,\r\n  Line_break_not_permitted_here = 1142,\r\n  Declaration_expected = 1146,\r\n  _const_declarations_must_be_initialized = 1155,\r\n  Unterminated_regular_expression_literal = 1161,\r\n  Interface_declaration_cannot_have_implements_clause = 1176,\r\n  Binary_digit_expected = 1177,\r\n  Octal_digit_expected = 1178,\r\n  An_implementation_cannot_be_declared_in_ambient_contexts = 1183,\r\n  An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive = 1198,\r\n  Unterminated_Unicode_escape_sequence = 1199,\r\n  Decorators_are_not_valid_here = 1206,\r\n  _abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration = 1242,\r\n  Method_0_cannot_have_an_implementation_because_it_is_marked_abstract = 1245,\r\n  A_class_may_only_extend_another_class = 1311,\r\n  A_parameter_property_cannot_be_declared_using_a_rest_parameter = 1317,\r\n  Duplicate_identifier_0 = 2300,\r\n  Cannot_find_name_0 = 2304,\r\n  Module_0_has_no_exported_member_1 = 2305,\r\n  Generic_type_0_requires_1_type_argument_s = 2314,\r\n  Type_0_is_not_generic = 2315,\r\n  Type_0_is_not_assignable_to_type_1 = 2322,\r\n  Index_signature_is_missing_in_type_0 = 2329,\r\n  _this_cannot_be_referenced_in_current_location = 2332,\r\n  _super_can_only_be_referenced_in_a_derived_class = 2335,\r\n  Property_0_does_not_exist_on_type_1 = 2339,\r\n  Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures = 2349,\r\n  Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature = 2351,\r\n  A_function_whose_declared_type_is_not_void_must_return_a_value = 2355,\r\n  The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access = 2357,\r\n  The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access = 2364,\r\n  Operator_0_cannot_be_applied_to_types_1_and_2 = 2365,\r\n  _get_and_set_accessor_must_have_the_same_type = 2380,\r\n  Constructor_implementation_is_missing = 2390,\r\n  Function_implementation_is_missing_or_not_immediately_following_the_declaration = 2391,\r\n  Multiple_constructor_implementations_are_not_allowed = 2392,\r\n  Duplicate_function_implementation = 2393,\r\n  Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local = 2395,\r\n  Type_0_has_no_property_1 = 2460,\r\n  The_0_operator_cannot_be_applied_to_type_1 = 2469,\r\n  In_const_enum_declarations_member_initializer_must_be_constant_expression = 2474,\r\n  Export_declaration_conflicts_with_exported_declaration_of_0 = 2484,\r\n  Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property = 2540,\r\n  The_target_of_an_assignment_must_be_a_variable_or_a_property_access = 2541,\r\n  Index_signature_in_type_0_only_permits_reading = 2542,\r\n  Expected_0_arguments_but_got_1 = 2554,\r\n  Expected_at_least_0_arguments_but_got_1 = 2555,\r\n  Expected_0_type_arguments_but_got_1 = 2558,\r\n  A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums = 2651,\r\n  Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration = 2673,\r\n  Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration = 2674,\r\n  Namespace_0_has_no_exported_member_1 = 2694,\r\n  File_0_not_found = 6054,\r\n  Numeric_separators_are_not_allowed_here = 6188,\r\n  Multiple_consecutive_numeric_separators_are_not_permitted = 6189\r\n}\r\n\r\n/** Translates a diagnostic code to its respective string. */\r\nexport function diagnosticCodeToString(code: DiagnosticCode): string {\r\n  switch (code) {\r\n    case 100: return \"Operation not supported.\";\r\n    case 101: return \"Operation is unsafe.\";\r\n    case 102: return \"User-defined: {0}\";\r\n    case 200: return \"Conversion from type '{0}' to '{1}' requires an explicit cast.\";\r\n    case 201: return \"Conversion from type '{0}' to '{1}' will require an explicit cast when switching between 32/64-bit.\";\r\n    case 202: return \"Type '{0}' cannot be changed to type '{1}'.\";\r\n    case 203: return \"Type '{0}' cannot be reinterpreted as type '{1}'.\";\r\n    case 204: return \"Basic type '{0}' cannot be nullable.\";\r\n    case 205: return \"Cannot export a mutable global.\";\r\n    case 206: return \"Compiling constant with non-constant initializer as mutable.\";\r\n    case 207: return \"Unmanaged classes cannot extend managed classes and vice-versa.\";\r\n    case 208: return \"Unmanaged classes cannot implement interfaces.\";\r\n    case 209: return \"Invalid regular expression flags.\";\r\n    case 210: return \"Implementation '{0}' must match the signature '{1}'.\";\r\n    case 211: return \"Class '{0}' is sealed and cannot be extended.\";\r\n    case 212: return \"Decorator '{0}' is not valid here.\";\r\n    case 213: return \"Duplicate decorator.\";\r\n    case 214: return \"An allocator must be declared to allocate memory. Try importing allocator/arena or allocator/tlsf.\";\r\n    case 215: return \"Optional parameter must have an initializer.\";\r\n    case 216: return \"Constructor of class '{0}' must not require any arguments.\";\r\n    case 217: return \"Function '{0}' cannot be inlined into itself.\";\r\n    case 218: return \"Cannot access method '{0}' without calling it as it requires 'this' to be set.\";\r\n    case 1002: return \"Unterminated string literal.\";\r\n    case 1003: return \"Identifier expected.\";\r\n    case 1005: return \"'{0}' expected.\";\r\n    case 1006: return \"A file cannot have a reference to itself.\";\r\n    case 1009: return \"Trailing comma not allowed.\";\r\n    case 1012: return \"Unexpected token.\";\r\n    case 1014: return \"A rest parameter must be last in a parameter list.\";\r\n    case 1015: return \"Parameter cannot have question mark and initializer.\";\r\n    case 1016: return \"A required parameter cannot follow an optional parameter.\";\r\n    case 1036: return \"Statements are not allowed in ambient contexts.\";\r\n    case 1039: return \"Initializers are not allowed in ambient contexts.\";\r\n    case 1042: return \"'{0}' modifier cannot be used here.\";\r\n    case 1047: return \"A rest parameter cannot be optional.\";\r\n    case 1048: return \"A rest parameter cannot have an initializer.\";\r\n    case 1049: return \"A 'set' accessor must have exactly one parameter.\";\r\n    case 1052: return \"A 'set' accessor parameter cannot have an initializer.\";\r\n    case 1054: return \"A 'get' accessor cannot have parameters.\";\r\n    case 1061: return \"Enum member must have initializer.\";\r\n    case 1092: return \"Type parameters cannot appear on a constructor declaration.\";\r\n    case 1093: return \"Type annotation cannot appear on a constructor declaration.\";\r\n    case 1094: return \"An accessor cannot have type parameters.\";\r\n    case 1095: return \"A 'set' accessor cannot have a return type annotation.\";\r\n    case 1098: return \"Type parameter list cannot be empty.\";\r\n    case 1104: return \"A 'continue' statement can only be used within an enclosing iteration statement.\";\r\n    case 1105: return \"A 'break' statement can only be used within an enclosing iteration or switch statement.\";\r\n    case 1108: return \"A 'return' statement can only be used within a function body.\";\r\n    case 1109: return \"Expression expected.\";\r\n    case 1110: return \"Type expected.\";\r\n    case 1113: return \"A 'default' clause cannot appear more than once in a 'switch' statement.\";\r\n    case 1114: return \"Duplicate label '{0}'.\";\r\n    case 1121: return \"Octal literals are not allowed in strict mode.\";\r\n    case 1124: return \"Digit expected.\";\r\n    case 1125: return \"Hexadecimal digit expected.\";\r\n    case 1126: return \"Unexpected end of text.\";\r\n    case 1127: return \"Invalid character.\";\r\n    case 1130: return \"'case' or 'default' expected.\";\r\n    case 1038: return \"A 'declare' modifier cannot be used in an already ambient context.\";\r\n    case 1140: return \"Type argument expected.\";\r\n    case 1141: return \"String literal expected.\";\r\n    case 1142: return \"Line break not permitted here.\";\r\n    case 1146: return \"Declaration expected.\";\r\n    case 1155: return \"'const' declarations must be initialized.\";\r\n    case 1161: return \"Unterminated regular expression literal.\";\r\n    case 1176: return \"Interface declaration cannot have 'implements' clause.\";\r\n    case 1177: return \"Binary digit expected.\";\r\n    case 1178: return \"Octal digit expected.\";\r\n    case 1183: return \"An implementation cannot be declared in ambient contexts.\";\r\n    case 1198: return \"An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive.\";\r\n    case 1199: return \"Unterminated Unicode escape sequence.\";\r\n    case 1206: return \"Decorators are not valid here.\";\r\n    case 1242: return \"'abstract' modifier can only appear on a class, method, or property declaration.\";\r\n    case 1245: return \"Method '{0}' cannot have an implementation because it is marked abstract.\";\r\n    case 1311: return \"A class may only extend another class.\";\r\n    case 1317: return \"A parameter property cannot be declared using a rest parameter.\";\r\n    case 2300: return \"Duplicate identifier '{0}'.\";\r\n    case 2304: return \"Cannot find name '{0}'.\";\r\n    case 2305: return \"Module '{0}' has no exported member '{1}'.\";\r\n    case 2314: return \"Generic type '{0}' requires {1} type argument(s).\";\r\n    case 2315: return \"Type '{0}' is not generic.\";\r\n    case 2322: return \"Type '{0}' is not assignable to type '{1}'.\";\r\n    case 2329: return \"Index signature is missing in type '{0}'.\";\r\n    case 2332: return \"'this' cannot be referenced in current location.\";\r\n    case 2335: return \"'super' can only be referenced in a derived class.\";\r\n    case 2339: return \"Property '{0}' does not exist on type '{1}'.\";\r\n    case 2349: return \"Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures.\";\r\n    case 2351: return \"Cannot use 'new' with an expression whose type lacks a construct signature.\";\r\n    case 2355: return \"A function whose declared type is not 'void' must return a value.\";\r\n    case 2357: return \"The operand of an increment or decrement operator must be a variable or a property access.\";\r\n    case 2364: return \"The left-hand side of an assignment expression must be a variable or a property access.\";\r\n    case 2365: return \"Operator '{0}' cannot be applied to types '{1}' and '{2}'.\";\r\n    case 2380: return \"'get' and 'set' accessor must have the same type.\";\r\n    case 2390: return \"Constructor implementation is missing.\";\r\n    case 2391: return \"Function implementation is missing or not immediately following the declaration.\";\r\n    case 2392: return \"Multiple constructor implementations are not allowed.\";\r\n    case 2393: return \"Duplicate function implementation.\";\r\n    case 2395: return \"Individual declarations in merged declaration '{0}' must be all exported or all local.\";\r\n    case 2460: return \"Type '{0}' has no property '{1}'.\";\r\n    case 2469: return \"The '{0}' operator cannot be applied to type '{1}'.\";\r\n    case 2474: return \"In 'const' enum declarations member initializer must be constant expression.\";\r\n    case 2484: return \"Export declaration conflicts with exported declaration of '{0}'.\";\r\n    case 2540: return \"Cannot assign to '{0}' because it is a constant or a read-only property.\";\r\n    case 2541: return \"The target of an assignment must be a variable or a property access.\";\r\n    case 2542: return \"Index signature in type '{0}' only permits reading.\";\r\n    case 2554: return \"Expected {0} arguments, but got {1}.\";\r\n    case 2555: return \"Expected at least {0} arguments, but got {1}.\";\r\n    case 2558: return \"Expected {0} type arguments, but got {1}.\";\r\n    case 2651: return \"A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums.\";\r\n    case 2673: return \"Constructor of class '{0}' is private and only accessible within the class declaration.\";\r\n    case 2674: return \"Constructor of class '{0}' is protected and only accessible within the class declaration.\";\r\n    case 2694: return \"Namespace '{0}' has no exported member '{1}'.\";\r\n    case 6054: return \"File '{0}' not found.\";\r\n    case 6188: return \"Numeric separators are not allowed here.\";\r\n    case 6189: return \"Multiple consecutive numeric separators are not permitted.\";\r\n    default: return \"\";\r\n  }\r\n}\r\n","/**\r\n * Resolve infrastructure to obtain types and elements.\r\n * @module resolver\r\n *//***/\r\n\r\nimport {\r\n  DiagnosticEmitter,\r\n  DiagnosticCode\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Program,\r\n  ElementKind,\r\n  OperatorKind,\r\n  FlowFlags,\r\n\r\n  Element,\r\n  Class,\r\n  ClassPrototype,\r\n  Function,\r\n  FunctionTarget,\r\n  FunctionPrototype,\r\n  VariableLikeElement,\r\n  Property,\r\n  DecoratorFlags,\r\n  FieldPrototype,\r\n  Field\r\n} from \"./program\";\r\n\r\nimport {\r\n  SignatureNode,\r\n  ParameterKind,\r\n  CommonTypeNode,\r\n  NodeKind,\r\n  TypeNode,\r\n  TypeParameterNode,\r\n  Node,\r\n  Range,\r\n  IdentifierExpression,\r\n  CallExpression,\r\n  ElementAccessExpression,\r\n  PropertyAccessExpression,\r\n  LiteralExpression,\r\n  LiteralKind,\r\n  ParenthesizedExpression,\r\n  AssertionExpression,\r\n  Expression\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Type,\r\n  Signature,\r\n  typesToString\r\n} from \"./types\";\r\n\r\nimport {\r\n  PATH_DELIMITER,\r\n  INSTANCE_DELIMITER,\r\n  CommonFlags\r\n} from \"./common\";\r\n\r\n/** Indicates whether errors are reported or not. */\r\nexport enum ReportMode {\r\n  /** Report errors. */\r\n  REPORT,\r\n  /** Swallow errors. */\r\n  SWALLOW\r\n}\r\n\r\n/** Provides tools to resolve types and expressions. */\r\nexport class Resolver extends DiagnosticEmitter {\r\n\r\n  /** The program this resolver belongs to. */\r\n  program: Program;\r\n\r\n  /** Target expression of the previously resolved property or element access. */\r\n  currentThisExpression: Expression | null = null;\r\n  /** Element expression of the previously resolved element access. */\r\n  currentElementExpression : Expression | null = null;\r\n\r\n  /** Constructs the resolver for the specified program. */\r\n  constructor(program: Program) {\r\n    super(program.diagnostics);\r\n    this.program = program;\r\n  }\r\n\r\n  /** Resolves a {@link CommonTypeNode} to a concrete {@link Type}. */\r\n  resolveType(\r\n    node: CommonTypeNode,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    reportMode = ReportMode.REPORT\r\n  ): Type | null {\r\n\r\n    // handle signatures specifically\r\n    if (node.kind == NodeKind.SIGNATURE) {\r\n      let signature = this.resolveSignature(<SignatureNode>node, contextualTypeArguments, reportMode);\r\n      if (!signature) return null;\r\n      return node.isNullable ? signature.type.asNullable() : signature.type;\r\n    }\r\n\r\n    // now dealing with TypeNode\r\n    assert(node.kind == NodeKind.TYPE);\r\n    var typeNode = <TypeNode>node;\r\n    var simpleName = typeNode.name.text;\r\n    var globalName = simpleName;\r\n    var localName = typeNode.range.source.internalPath + PATH_DELIMITER + simpleName; // TODO cache\r\n\r\n    // check file-global / program-global enum or class\r\n    {\r\n      let elementsLookup = this.program.elementsLookup;\r\n      let element: Element | null;\r\n      if (\r\n        (element = elementsLookup.get(localName)) || // file-global\r\n        (element = elementsLookup.get(globalName))   // program-global\r\n      ) {\r\n        switch (element.kind) {\r\n          case ElementKind.ENUM: {\r\n            if (typeNode.typeArguments !== null && typeNode.typeArguments.length) {\r\n              if (reportMode == ReportMode.REPORT) {\r\n                this.error(\r\n                  DiagnosticCode.Type_0_is_not_generic,\r\n                  node.range, element.internalName\r\n                );\r\n              }\r\n              return null;\r\n            }\r\n            return Type.i32;\r\n          }\r\n          case ElementKind.CLASS_PROTOTYPE: {\r\n            let instance = this.resolveClassInclTypeArguments(\r\n              <ClassPrototype>element,\r\n              typeNode.typeArguments,\r\n              contextualTypeArguments,\r\n              node\r\n            ); // reports\r\n            if (!instance) return null;\r\n            return node.isNullable ? instance.type.asNullable() : instance.type;\r\n          }\r\n        }\r\n      }\r\n    }\r\n\r\n    // check (global) type alias\r\n    {\r\n      let alias = this.program.typeAliases.get(simpleName);\r\n      if (alias) return this.resolveType(alias.type, contextualTypeArguments, reportMode);\r\n    }\r\n\r\n    // resolve parameters\r\n    {\r\n      let typeArgumentNodes = typeNode.typeArguments;\r\n      if (typeArgumentNodes) {\r\n        let numTypeArguments = typeArgumentNodes.length;\r\n        let paramTypes = new Array<Type>(numTypeArguments);\r\n        for (let i = 0; i < numTypeArguments; ++i) {\r\n          let paramType = this.resolveType( // reports\r\n            typeArgumentNodes[i],\r\n            contextualTypeArguments,\r\n            reportMode\r\n          );\r\n          if (!paramType) return null;\r\n          paramTypes[i] = paramType;\r\n        }\r\n        if (numTypeArguments) { // can't be a placeholder if it has parameters\r\n          let instanceKey = typesToString(paramTypes);\r\n          if (instanceKey.length) {\r\n            localName += \"<\" + instanceKey + \">\";\r\n            globalName += \"<\" + instanceKey + \">\";\r\n          }\r\n        } else if (contextualTypeArguments) {\r\n          let placeholderType = contextualTypeArguments.get(globalName);\r\n          if (placeholderType) return placeholderType;\r\n        }\r\n      }\r\n    }\r\n\r\n    // check file-global / program-global type\r\n    {\r\n      let typesLookup = this.program.typesLookup;\r\n      let type: Type | null;\r\n      if (\r\n        (type = typesLookup.get(localName)) ||\r\n        (type = typesLookup.get(globalName))\r\n      ) {\r\n        return type;\r\n      }\r\n    }\r\n\r\n    if (reportMode == ReportMode.REPORT) {\r\n      this.error(\r\n        DiagnosticCode.Cannot_find_name_0,\r\n        typeNode.name.range, globalName\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  /** Resolves a {@link SignatureNode} to a concrete {@link Signature}. */\r\n  resolveSignature(\r\n    node: SignatureNode,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Signature | null {\r\n    var explicitThisType = node.explicitThisType;\r\n    var thisType: Type | null = null;\r\n    if (explicitThisType) {\r\n      thisType = this.resolveType(explicitThisType, contextualTypeArguments, reportMode);\r\n      if (!thisType) return null;\r\n    }\r\n    var parameterTypeNodes = node.parameters;\r\n    var numParameters = parameterTypeNodes.length;\r\n    var parameterTypes = new Array<Type>(numParameters);\r\n    var parameterNames = new Array<string>(numParameters);\r\n    var requiredParameters = 0;\r\n    var hasRest = false;\r\n    for (let i = 0; i < numParameters; ++i) {\r\n      let parameterTypeNode = parameterTypeNodes[i];\r\n      switch (parameterTypeNode.parameterKind) {\r\n        case ParameterKind.DEFAULT: {\r\n          requiredParameters = i + 1;\r\n          break;\r\n        }\r\n        case ParameterKind.REST: {\r\n          assert(i == numParameters);\r\n          hasRest = true;\r\n          break;\r\n        }\r\n      }\r\n      let parameterType = this.resolveType(\r\n        assert(parameterTypeNode.type),\r\n        contextualTypeArguments,\r\n        reportMode\r\n      );\r\n      if (!parameterType) return null;\r\n      parameterTypes[i] = parameterType;\r\n      parameterNames[i] = parameterTypeNode.name.text;\r\n    }\r\n    var returnTypeNode = node.returnType;\r\n    var returnType: Type | null;\r\n    if (returnTypeNode) {\r\n      returnType = this.resolveType(returnTypeNode, contextualTypeArguments, reportMode);\r\n      if (!returnType) return null;\r\n    } else {\r\n      returnType = Type.void;\r\n    }\r\n    var signature = new Signature(parameterTypes, returnType, thisType);\r\n    signature.parameterNames = parameterNames;\r\n    signature.requiredParameters = requiredParameters;\r\n    signature.hasRest = hasRest;\r\n    return signature;\r\n  }\r\n\r\n  /** Resolves an array of type arguments to concrete types. */\r\n  resolveTypeArguments(\r\n    typeParameters: TypeParameterNode[],\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    alternativeReportNode: Node | null = null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Type[] | null {\r\n    var parameterCount = typeParameters.length;\r\n    var argumentCount = typeArgumentNodes ? typeArgumentNodes.length : 0;\r\n    if (parameterCount != argumentCount) {\r\n      if (argumentCount) {\r\n        this.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          Range.join(\r\n            (<TypeNode[]>typeArgumentNodes)[0].range,\r\n            (<TypeNode[]>typeArgumentNodes)[argumentCount - 1].range\r\n          ),\r\n          parameterCount.toString(10), argumentCount.toString(10)\r\n        );\r\n      } else if (alternativeReportNode) {\r\n        this.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          alternativeReportNode.range.atEnd, parameterCount.toString(10), \"0\"\r\n        );\r\n      }\r\n      return null;\r\n    }\r\n    var typeArguments = new Array<Type>(parameterCount);\r\n    for (let i = 0; i < parameterCount; ++i) {\r\n      let type = this.resolveType( // reports\r\n        (<TypeNode[]>typeArgumentNodes)[i],\r\n        contextualTypeArguments,\r\n        reportMode\r\n      );\r\n      if (!type) return null;\r\n      // TODO: check extendsType\r\n      typeArguments[i] = type;\r\n    }\r\n    return typeArguments;\r\n  }\r\n\r\n  /** Resolves an identifier to the element it refers to. */\r\n  resolveIdentifier(\r\n    identifier: IdentifierExpression,\r\n    context: Element | null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Element | null {\r\n    var name = identifier.text;\r\n    var element: Element | null;\r\n\r\n    if (context) {\r\n\r\n      switch (context.kind) {\r\n        case ElementKind.FUNCTION: { // search locals, use prototype\r\n          element = (<Function>context).flow.getScopedLocal(name);\r\n          if (element) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return element;\r\n          }\r\n          context = (<Function>context).prototype.parent;\r\n          break;\r\n        }\r\n        case ElementKind.CLASS: { // use prototype\r\n          context = (<Class>context).prototype.parent;\r\n          break;\r\n        }\r\n      }\r\n\r\n      // search context\r\n      while (context) {\r\n        let members = context.members;\r\n        if (members) {\r\n          if (element = members.get(name)) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return element;\r\n          }\r\n        }\r\n        context = context.parent;\r\n      }\r\n    }\r\n\r\n    // search current file\r\n    var elementsLookup = this.program.elementsLookup;\r\n    if (element = elementsLookup.get(identifier.range.source.internalPath + PATH_DELIMITER + name)) {\r\n      this.currentThisExpression = null;\r\n      this.currentElementExpression = null;\r\n      return element; // GLOBAL, FUNCTION_PROTOTYPE, CLASS_PROTOTYPE\r\n    }\r\n\r\n    // search global scope\r\n    if (element = elementsLookup.get(name)) {\r\n      this.currentThisExpression = null;\r\n      this.currentElementExpression = null;\r\n      return element; // GLOBAL, FUNCTION_PROTOTYPE, CLASS_PROTOTYPE\r\n    }\r\n\r\n    if (reportMode == ReportMode.REPORT) {\r\n      this.error(\r\n        DiagnosticCode.Cannot_find_name_0,\r\n        identifier.range, name\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  /** Resolves a property access to the element it refers to. */\r\n  resolvePropertyAccess(\r\n    propertyAccess: PropertyAccessExpression,\r\n    contextualFunction: Function,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Element | null {\r\n    // start by resolving the lhs target (expression before the last dot)\r\n    var targetExpression = propertyAccess.expression;\r\n    var target = this.resolveExpression(targetExpression, contextualFunction, reportMode); // reports\r\n    if (!target) return null;\r\n\r\n    // at this point we know exactly what the target is, so look up the element within\r\n    var propertyName = propertyAccess.property.text;\r\n\r\n    // Resolve variable-likes to the class type they reference first\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL:\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        let type = (<VariableLikeElement>target).type;\r\n        assert(type != Type.void);\r\n        let classReference = type.classReference;\r\n        if (!classReference) {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.property.range, propertyName, (<VariableLikeElement>target).type.toString()\r\n          );\r\n          return null;\r\n        }\r\n        target = classReference;\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let getter = this.resolveFunction(\r\n          assert((<Property>target).getterPrototype),\r\n          null,\r\n          null,\r\n          reportMode\r\n        );\r\n        if (!getter) return null;\r\n        let classReference = getter.signature.returnType.classReference;\r\n        if (!classReference) {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.property.range, propertyName, getter.signature.returnType.toString()\r\n          );\r\n          return null;\r\n        }\r\n        target = classReference;\r\n        break;\r\n      }\r\n      case ElementKind.CLASS: {\r\n        let elementExpression = this.currentElementExpression;\r\n        if (elementExpression) {\r\n          let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET);\r\n          if (!indexedGet) {\r\n            this.error(\r\n              DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n              elementExpression.range, (<Class>target).internalName\r\n            );\r\n            return null;\r\n          }\r\n          let returnType = indexedGet.signature.returnType;\r\n          if (!(target = returnType.classReference)) {\r\n            this.error(\r\n              DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n              propertyAccess.property.range, propertyName, returnType.toString()\r\n            );\r\n            return null;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n    }\r\n\r\n    // Look up the member within\r\n    switch (target.kind) {\r\n      case ElementKind.CLASS_PROTOTYPE:\r\n      case ElementKind.CLASS: {\r\n        do {\r\n          let members = target.members;\r\n          let member: Element | null;\r\n          if (members && (member = members.get(propertyName))) {\r\n            this.currentThisExpression = targetExpression;\r\n            this.currentElementExpression = null;\r\n            return member; // instance FIELD, static GLOBAL, FUNCTION_PROTOTYPE...\r\n          }\r\n          // traverse inherited static members on the base prototype if target is a class prototype\r\n          if (target.kind == ElementKind.CLASS_PROTOTYPE) {\r\n            if ((<ClassPrototype>target).basePrototype) {\r\n              target = <ClassPrototype>(<ClassPrototype>target).basePrototype;\r\n            } else {\r\n              break;\r\n            }\r\n          // traverse inherited instance members on the base class if target is a class instance\r\n          } else if (target.kind == ElementKind.CLASS) {\r\n            if ((<Class>target).base) {\r\n              target = <Class>(<Class>target).base;\r\n            } else {\r\n              break;\r\n            }\r\n          } else {\r\n            break;\r\n          }\r\n        } while (true);\r\n        break;\r\n      }\r\n      default: { // enums or other namespace-like elements\r\n        let members = target.members;\r\n        if (members) {\r\n          let member = members.get(propertyName);\r\n          if (member) {\r\n            this.currentThisExpression = targetExpression;\r\n            this.currentElementExpression = null;\r\n            return member; // static ENUMVALUE, static GLOBAL, static FUNCTION_PROTOTYPE...\r\n          }\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n      propertyAccess.property.range, propertyName, target.internalName\r\n    );\r\n    return null;\r\n  }\r\n\r\n  resolveElementAccess(\r\n    elementAccess: ElementAccessExpression,\r\n    contextualFunction: Function,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Element | null {\r\n    var targetExpression = elementAccess.expression;\r\n    var target = this.resolveExpression(targetExpression, contextualFunction, reportMode);\r\n    if (!target) return null;\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL:\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        let type = (<VariableLikeElement>target).type;\r\n        if (target = type.classReference) {\r\n          this.currentThisExpression = targetExpression;\r\n          this.currentElementExpression = elementAccess.elementExpression;\r\n          return target;\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.CLASS: { // element access on element access\r\n        let indexedGet = (<Class>target).lookupOverload(OperatorKind.INDEXED_GET);\r\n        if (!indexedGet) {\r\n          if (reportMode == ReportMode.REPORT) {\r\n            this.error(\r\n              DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n              elementAccess.range, (<Class>target).internalName\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n        let returnType = indexedGet.signature.returnType;\r\n        if (target = returnType.classReference) {\r\n          this.currentThisExpression = targetExpression;\r\n          this.currentElementExpression = elementAccess.elementExpression;\r\n          return target;\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    if (reportMode == ReportMode.REPORT) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        targetExpression.range\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  resolveExpression(\r\n    expression: Expression,\r\n    contextualFunction: Function,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Element | null {\r\n    while (expression.kind == NodeKind.PARENTHESIZED) {\r\n      expression = (<ParenthesizedExpression>expression).expression;\r\n    }\r\n    switch (expression.kind) {\r\n      case NodeKind.ASSERTION: {\r\n        let type = this.resolveType(\r\n          (<AssertionExpression>expression).toType,\r\n          contextualFunction.flow.contextualTypeArguments,\r\n          reportMode\r\n        );\r\n        if (type) {\r\n          let classType = type.classReference;\r\n          if (classType) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return classType;\r\n          }\r\n        }\r\n        return null;\r\n      }\r\n      case NodeKind.BINARY: { // TODO: string concatenation, mostly\r\n        throw new Error(\"not implemented\");\r\n      }\r\n      case NodeKind.THIS: { // -> Class / ClassPrototype\r\n        if (contextualFunction.flow.is(FlowFlags.INLINE_CONTEXT)) {\r\n          let explicitLocal = contextualFunction.flow.getScopedLocal(\"this\");\r\n          if (explicitLocal) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return explicitLocal;\r\n          }\r\n        }\r\n        let parent = contextualFunction.parent;\r\n        if (parent) {\r\n          this.currentThisExpression = null;\r\n          this.currentElementExpression = null;\r\n          return parent;\r\n        }\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.error(\r\n            DiagnosticCode._this_cannot_be_referenced_in_current_location,\r\n            expression.range\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      case NodeKind.SUPER: { // -> Class\r\n        if (contextualFunction.flow.is(FlowFlags.INLINE_CONTEXT)) {\r\n          let explicitLocal = contextualFunction.flow.getScopedLocal(\"super\");\r\n          if (explicitLocal) {\r\n            this.currentThisExpression = null;\r\n            this.currentElementExpression = null;\r\n            return explicitLocal;\r\n          }\r\n        }\r\n        let parent = contextualFunction.parent;\r\n        if (parent && parent.kind == ElementKind.CLASS && (parent = (<Class>parent).base)) {\r\n          this.currentThisExpression = null;\r\n          this.currentElementExpression = null;\r\n          return parent;\r\n        }\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.error(\r\n            DiagnosticCode._super_can_only_be_referenced_in_a_derived_class,\r\n            expression.range\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      case NodeKind.IDENTIFIER: {\r\n        return this.resolveIdentifier(<IdentifierExpression>expression, contextualFunction, reportMode);\r\n      }\r\n      case NodeKind.LITERAL: {\r\n        switch ((<LiteralExpression>expression).literalKind) {\r\n          case LiteralKind.STRING: {\r\n            this.currentThisExpression = expression;\r\n            this.currentElementExpression = null;\r\n            return this.program.stringInstance;\r\n          }\r\n          // case LiteralKind.ARRAY: // TODO\r\n        }\r\n        break;\r\n      }\r\n      case NodeKind.PROPERTYACCESS: {\r\n        return this.resolvePropertyAccess(\r\n          <PropertyAccessExpression>expression,\r\n          contextualFunction,\r\n          reportMode\r\n        );\r\n      }\r\n      case NodeKind.ELEMENTACCESS: {\r\n        return this.resolveElementAccess(\r\n          <ElementAccessExpression>expression,\r\n          contextualFunction,\r\n          reportMode\r\n        );\r\n      }\r\n      case NodeKind.CALL: {\r\n        let targetExpression = (<CallExpression>expression).expression;\r\n        let target = this.resolveExpression(targetExpression, contextualFunction, reportMode);\r\n        if (!target) return null;\r\n        if (target.kind == ElementKind.FUNCTION_PROTOTYPE) {\r\n          let instance = this.resolveFunctionInclTypeArguments(\r\n            <FunctionPrototype>target,\r\n            (<CallExpression>expression).typeArguments,\r\n            contextualFunction.flow.contextualTypeArguments,\r\n            expression,\r\n            reportMode\r\n          );\r\n          if (!instance) return null;\r\n          let returnType = instance.signature.returnType;\r\n          let classType = returnType.classReference;\r\n          if (classType) {\r\n            // reuse resolvedThisExpression (might be property access)\r\n            // reuse resolvedElementExpression (might be element access)\r\n            return classType;\r\n          } else {\r\n            let signature = returnType.signatureReference;\r\n            if (signature) {\r\n              let functionTarget = signature.cachedFunctionTarget;\r\n              if (!functionTarget) {\r\n                functionTarget = new FunctionTarget(this.program, signature);\r\n                signature.cachedFunctionTarget = functionTarget;\r\n              }\r\n              // reuse resolvedThisExpression (might be property access)\r\n              // reuse resolvedElementExpression (might be element access)\r\n              return functionTarget;\r\n            }\r\n          }\r\n          if (reportMode == ReportMode.REPORT) {\r\n            this.error(\r\n              DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n              targetExpression.range, target.internalName\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    if (reportMode == ReportMode.REPORT) {\r\n      this.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        expression.range\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  /** Resolves a function prototype to an instance using the specified concrete type arguments. */\r\n  resolveFunction(\r\n    prototype: FunctionPrototype,\r\n    typeArguments: Type[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Function | null {\r\n    var instanceKey = typeArguments ? typesToString(typeArguments) : \"\";\r\n    var instance = prototype.instances.get(instanceKey);\r\n    if (instance) return instance;\r\n\r\n    var declaration = prototype.declaration;\r\n    var isInstance = prototype.is(CommonFlags.INSTANCE);\r\n    var classPrototype = prototype.classPrototype;\r\n\r\n    // inherit contextual type arguments as provided. might be overridden.\r\n    var inheritedTypeArguments = contextualTypeArguments;\r\n    contextualTypeArguments = new Map();\r\n    if (inheritedTypeArguments) {\r\n      for (let [inheritedName, inheritedType] of inheritedTypeArguments) {\r\n        contextualTypeArguments.set(\r\n          inheritedName,\r\n          inheritedType\r\n        );\r\n      }\r\n    }\r\n\r\n    // override with class type arguments if a partially resolved instance method\r\n    var classTypeArguments = prototype.classTypeArguments;\r\n    if (classTypeArguments) { // set only if partially resolved\r\n      assert(prototype.is(CommonFlags.INSTANCE));\r\n      let classDeclaration = assert(classPrototype).declaration;\r\n      let classTypeParameters = classDeclaration.typeParameters;\r\n      let numClassTypeParameters = classTypeParameters.length;\r\n      assert(numClassTypeParameters == classTypeArguments.length);\r\n      for (let i = 0; i < numClassTypeParameters; ++i) {\r\n        contextualTypeArguments.set(\r\n          classTypeParameters[i].name.text,\r\n          classTypeArguments[i]\r\n        );\r\n      }\r\n    } else {\r\n      assert(!classTypeArguments);\r\n    }\r\n\r\n    // override with function specific type arguments\r\n    var signatureNode = declaration.signature;\r\n    var functionTypeParameters = declaration.typeParameters;\r\n    var numFunctionTypeArguments: i32;\r\n    if (typeArguments && (numFunctionTypeArguments = typeArguments.length)) {\r\n      assert(functionTypeParameters && numFunctionTypeArguments == functionTypeParameters.length);\r\n      for (let i = 0; i < numFunctionTypeArguments; ++i) {\r\n        contextualTypeArguments.set(\r\n          (<TypeParameterNode[]>functionTypeParameters)[i].name.text,\r\n          typeArguments[i]\r\n        );\r\n      }\r\n    } else {\r\n      assert(!functionTypeParameters || functionTypeParameters.length == 0);\r\n    }\r\n\r\n    // resolve class if an instance method\r\n    var classInstance: Class | null = null;\r\n    var thisType: Type | null = null;\r\n    if (isInstance) {\r\n      classInstance = this.resolveClass(\r\n        assert(classPrototype),\r\n        classTypeArguments,\r\n        contextualTypeArguments,\r\n        reportMode\r\n      );\r\n      if (!classInstance) return null;\r\n      thisType = classInstance.type;\r\n      contextualTypeArguments.set(\"this\", thisType);\r\n    }\r\n\r\n    // resolve signature node\r\n    var signatureParameters = signatureNode.parameters;\r\n    var signatureParameterCount = signatureParameters.length;\r\n    var parameterTypes = new Array<Type>(signatureParameterCount);\r\n    var parameterNames = new Array<string>(signatureParameterCount);\r\n    var requiredParameters = 0;\r\n    for (let i = 0; i < signatureParameterCount; ++i) {\r\n      let parameterDeclaration = signatureParameters[i];\r\n      if (parameterDeclaration.parameterKind == ParameterKind.DEFAULT) {\r\n        requiredParameters = i + 1;\r\n      }\r\n      let typeNode = assert(parameterDeclaration.type);\r\n      let parameterType = this.resolveType(typeNode, contextualTypeArguments, reportMode);\r\n      if (!parameterType) return null;\r\n      parameterTypes[i] = parameterType;\r\n      parameterNames[i] = parameterDeclaration.name.text;\r\n    }\r\n\r\n    var returnType: Type;\r\n    if (prototype.is(CommonFlags.SET)) {\r\n      returnType = Type.void; // not annotated\r\n    } else if (prototype.is(CommonFlags.CONSTRUCTOR)) {\r\n      returnType = assert(classInstance).type; // not annotated\r\n    } else {\r\n      let typeNode = assert(signatureNode.returnType);\r\n      let type = this.resolveType(typeNode, contextualTypeArguments, reportMode);\r\n      if (!type) return null;\r\n      returnType = type;\r\n    }\r\n\r\n    var signature = new Signature(parameterTypes, returnType, thisType);\r\n    signature.parameterNames = parameterNames;\r\n    signature.requiredParameters = requiredParameters;\r\n\r\n    var internalName = prototype.internalName;\r\n    if (instanceKey.length) internalName += \"<\" + instanceKey + \">\";\r\n    instance = new Function(\r\n      prototype,\r\n      internalName,\r\n      signature,\r\n      classInstance\r\n        ? classInstance\r\n        : classPrototype,\r\n      contextualTypeArguments\r\n    );\r\n    prototype.instances.set(instanceKey, instance);\r\n    this.program.instancesLookup.set(internalName, instance);\r\n    return instance;\r\n  }\r\n\r\n  /** Resolves a function prototype partially by applying the specified type arguments. */\r\n  resolveFunctionPartially(\r\n    prototype: FunctionPrototype,\r\n    typeArguments: Type[] | null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): FunctionPrototype | null {\r\n    assert(prototype.is(CommonFlags.INSTANCE));\r\n    var classPrototype = assert(prototype.classPrototype);\r\n\r\n    if (!(typeArguments && typeArguments.length)) return prototype; // no need to clone\r\n\r\n    var simpleName = prototype.simpleName;\r\n    var partialKey = typesToString(typeArguments);\r\n    var partialPrototype = new FunctionPrototype(\r\n      this.program,\r\n      simpleName,\r\n      classPrototype.internalName + \"<\" + partialKey + \">\" + INSTANCE_DELIMITER + simpleName,\r\n      prototype.declaration,\r\n      classPrototype,\r\n      prototype.decoratorFlags\r\n    );\r\n    partialPrototype.flags = prototype.flags;\r\n    partialPrototype.operatorKind = prototype.operatorKind;\r\n    partialPrototype.classTypeArguments = typeArguments;\r\n    return partialPrototype;\r\n  }\r\n\r\n  /** Resolves a function prototype to an instance by first resolving the specified type arguments. */\r\n  resolveFunctionInclTypeArguments(\r\n    prototype: FunctionPrototype,\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    reportNode: Node,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Function | null {\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n    if (prototype.is(CommonFlags.GENERIC)) {\r\n      assert(typeArgumentNodes != null && typeArgumentNodes.length != 0);\r\n      resolvedTypeArguments = this.resolveTypeArguments( // reports\r\n        assert(prototype.declaration.typeParameters),\r\n        typeArgumentNodes,\r\n        contextualTypeArguments,\r\n        reportNode,\r\n        reportMode\r\n      );\r\n      if (!resolvedTypeArguments) return null;\r\n    }\r\n    return this.resolveFunction(\r\n      prototype,\r\n      resolvedTypeArguments,\r\n      contextualTypeArguments,\r\n      reportMode\r\n    );\r\n  }\r\n\r\n  /** Resolves a class prototype using the specified concrete type arguments. */\r\n  resolveClass(\r\n    prototype: ClassPrototype,\r\n    typeArguments: Type[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null = null,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Class | null {\r\n    var instanceKey = typeArguments ? typesToString(typeArguments) : \"\";\r\n\r\n    // Check if this exact instance has already been resolved\r\n    var instance = prototype.instances.get(instanceKey);\r\n    if (instance) return instance;\r\n\r\n    // Copy contextual type arguments so we don't pollute the original map\r\n    var inheritedTypeArguments = contextualTypeArguments;\r\n    contextualTypeArguments = new Map();\r\n    if (inheritedTypeArguments) {\r\n      for (let [inheritedName, inheritedType] of inheritedTypeArguments) {\r\n        contextualTypeArguments.set(inheritedName, inheritedType);\r\n      }\r\n    }\r\n\r\n    // Insert contextual type arguments for this operation. Internally, this method is always\r\n    // called with matching type parameter / argument counts.\r\n    var declaration = prototype.declaration;\r\n    if (typeArguments) {\r\n      let typeParameters = declaration.typeParameters;\r\n      let expectedTypeArguments = typeParameters.length;\r\n      let actualTypeArguments = typeArguments.length;\r\n      assert(actualTypeArguments == expectedTypeArguments);\r\n      for (let i = 0; i < actualTypeArguments; ++i) {\r\n        contextualTypeArguments.set(typeParameters[i].name.text, typeArguments[i]);\r\n      }\r\n    } else {\r\n      assert(declaration.typeParameters.length == 0);\r\n    }\r\n\r\n    // Resolve base class if applicable\r\n    var baseClass: Class | null = null;\r\n    if (declaration.extendsType) {\r\n      let baseClassType = this.resolveType(\r\n        declaration.extendsType,\r\n        contextualTypeArguments,\r\n        reportMode\r\n      );\r\n      if (!baseClassType) return null;\r\n      if (!(baseClass = baseClassType.classReference)) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.program.error(\r\n            DiagnosticCode.A_class_may_only_extend_another_class,\r\n            declaration.extendsType.range\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      if (baseClass.hasDecorator(DecoratorFlags.SEALED)) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.program.error(\r\n            DiagnosticCode.Class_0_is_sealed_and_cannot_be_extended,\r\n            declaration.extendsType.range, baseClass.internalName\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      if (baseClass.hasDecorator(DecoratorFlags.UNMANAGED) != prototype.hasDecorator(DecoratorFlags.UNMANAGED)) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.program.error(\r\n            DiagnosticCode.Unmanaged_classes_cannot_extend_managed_classes_and_vice_versa,\r\n            Range.join(declaration.name.range, declaration.extendsType.range)\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n    }\r\n\r\n    // Construct the instance and remember that it has been resolved already\r\n    var simpleName = prototype.simpleName;\r\n    var internalName = prototype.internalName;\r\n    if (instanceKey.length) {\r\n      simpleName += \"<\" + instanceKey + \">\";\r\n      internalName += \"<\" + instanceKey + \">\";\r\n    }\r\n    instance = new Class(prototype, simpleName, internalName, typeArguments, baseClass);\r\n    instance.contextualTypeArguments = contextualTypeArguments;\r\n    prototype.instances.set(instanceKey, instance);\r\n    this.program.instancesLookup.set(internalName, instance);\r\n\r\n    // Inherit base class members and set up the initial memory offset for own fields\r\n    var memoryOffset: u32 = 0;\r\n    if (baseClass) {\r\n      if (baseClass.members) {\r\n        if (!instance.members) instance.members = new Map();\r\n        for (let inheritedMember of baseClass.members.values()) {\r\n          instance.members.set(inheritedMember.simpleName, inheritedMember);\r\n        }\r\n      }\r\n      memoryOffset = baseClass.currentMemoryOffset;\r\n    }\r\n\r\n    // Resolve constructor by first applying the class type arguments\r\n    if (prototype.constructorPrototype) {\r\n      let constructorPartial = this.resolveFunctionPartially(\r\n        prototype.constructorPrototype,\r\n        typeArguments,\r\n        reportMode\r\n      );\r\n      if (!constructorPartial) return null;\r\n      instance.constructorInstance = this.resolveFunction(constructorPartial, null, null, reportMode);\r\n    }\r\n\r\n    // Resolve instance members\r\n    if (prototype.instanceMembers) {\r\n      for (let member of prototype.instanceMembers.values()) {\r\n        switch (member.kind) {\r\n\r\n          // Lay out fields in advance\r\n          case ElementKind.FIELD_PROTOTYPE: {\r\n            if (!instance.members) instance.members = new Map();\r\n            let fieldDeclaration = (<FieldPrototype>member).declaration;\r\n            let fieldType: Type | null = null;\r\n            // TODO: handle duplicate non-private fields\r\n            if (!fieldDeclaration.type) {\r\n              if (baseClass !== null && baseClass.members !== null) {\r\n                let baseField = baseClass.members.get((<FieldPrototype>member).simpleName);\r\n                if (baseField && !baseField.is(CommonFlags.PRIVATE)) {\r\n                  assert(baseField.kind == ElementKind.FIELD);\r\n                  fieldType = (<Field>baseField).type;\r\n                }\r\n              }\r\n              if (!fieldType) {\r\n                if (reportMode == ReportMode.REPORT) {\r\n                  this.error(\r\n                    DiagnosticCode.Type_expected,\r\n                    fieldDeclaration.name.range.atEnd\r\n                  );\r\n                }\r\n              }\r\n            } else {\r\n              fieldType = this.resolveType(\r\n                fieldDeclaration.type,\r\n                instance.contextualTypeArguments,\r\n                reportMode\r\n              );\r\n            }\r\n            if (!fieldType) break;\r\n            let fieldInstance = new Field(\r\n              <FieldPrototype>member,\r\n              internalName + INSTANCE_DELIMITER + (<FieldPrototype>member).simpleName,\r\n              fieldType,\r\n              fieldDeclaration,\r\n              instance\r\n            );\r\n            switch (fieldType.byteSize) { // align\r\n              case 1: break;\r\n              case 2: { if (memoryOffset & 1) ++memoryOffset; break; }\r\n              case 4: { if (memoryOffset & 3) memoryOffset = (memoryOffset | 3) + 1; break; }\r\n              case 8: { if (memoryOffset & 7) memoryOffset = (memoryOffset | 7) + 1; break; }\r\n              default: assert(false);\r\n            }\r\n            fieldInstance.memoryOffset = memoryOffset;\r\n            memoryOffset += fieldType.byteSize;\r\n            instance.members.set(member.simpleName, fieldInstance);\r\n            break;\r\n          }\r\n\r\n          // Partially resolve methods as these might have type arguments on their own\r\n          case ElementKind.FUNCTION_PROTOTYPE: {\r\n            if (!instance.members) instance.members = new Map();\r\n            let partialPrototype = this.resolveFunctionPartially(\r\n              <FunctionPrototype>member,\r\n              typeArguments,\r\n              reportMode\r\n            );\r\n            if (!partialPrototype) return null;\r\n            partialPrototype.internalName = internalName + INSTANCE_DELIMITER + partialPrototype.simpleName;\r\n            instance.members.set(member.simpleName, partialPrototype);\r\n            break;\r\n          }\r\n\r\n          // Clone properties and partially resolve the wrapped accessors for consistence with other methods\r\n          case ElementKind.PROPERTY: {\r\n            if (!instance.members) instance.members = new Map();\r\n            let getterPrototype = assert((<Property>member).getterPrototype); // must be present\r\n            let setterPrototype = (<Property>member).setterPrototype;         // might be present\r\n            let instanceProperty = new Property(\r\n              this.program,\r\n              member.simpleName,\r\n              internalName + INSTANCE_DELIMITER + member.simpleName,\r\n              prototype\r\n            );\r\n            let partialGetterPrototype = this.resolveFunctionPartially(\r\n              getterPrototype,\r\n              typeArguments,\r\n              reportMode\r\n            );\r\n            if (!partialGetterPrototype) return null;\r\n            partialGetterPrototype\r\n              .internalName = internalName + INSTANCE_DELIMITER + partialGetterPrototype.simpleName;\r\n            instanceProperty.getterPrototype = partialGetterPrototype;\r\n            if (setterPrototype) {\r\n              let partialSetterPrototype = this.resolveFunctionPartially(\r\n                setterPrototype,\r\n                typeArguments,\r\n                reportMode\r\n              );\r\n              if (!partialSetterPrototype) return null;\r\n              partialSetterPrototype\r\n                .internalName = internalName + INSTANCE_DELIMITER + partialSetterPrototype.simpleName;\r\n              instanceProperty.setterPrototype = partialSetterPrototype;\r\n            }\r\n            instance.members.set(member.simpleName, instanceProperty);\r\n            break;\r\n          }\r\n          default: assert(false);\r\n        }\r\n      }\r\n    }\r\n\r\n    // Finalize memory offset\r\n    instance.currentMemoryOffset = memoryOffset;\r\n\r\n    // Fully resolve operator overloads (don't have type parameters on their own)\r\n    for (let [kind, overloadPrototype] of prototype.overloadPrototypes) {\r\n      assert(kind != OperatorKind.INVALID);\r\n      let operatorInstance: Function | null;\r\n      if (overloadPrototype.is(CommonFlags.INSTANCE)) {\r\n        let operatorPartial = this.resolveFunctionPartially(\r\n          overloadPrototype,\r\n          typeArguments,\r\n          reportMode\r\n        );\r\n        if (!operatorPartial) continue;\r\n        operatorInstance = this.resolveFunction(operatorPartial, null, null, reportMode);\r\n      } else {\r\n        operatorInstance = this.resolveFunction(overloadPrototype, null, null, reportMode);\r\n      }\r\n      if (!operatorInstance) continue;\r\n      let overloads = instance.overloads;\r\n      if (!overloads) instance.overloads = overloads = new Map();\r\n      overloads.set(kind, operatorInstance);\r\n    }\r\n    return instance;\r\n  }\r\n\r\n  /** Resolves a class prototype by first resolving the specified type arguments. */\r\n  resolveClassInclTypeArguments(\r\n    prototype: ClassPrototype,\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    reportNode: Node,\r\n    reportMode: ReportMode = ReportMode.REPORT\r\n  ): Class | null {\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n\r\n    // Resolve type arguments if generic\r\n    if (prototype.is(CommonFlags.GENERIC)) {\r\n      let typeParameterNodes = prototype.declaration.typeParameters;\r\n      let expectedTypeArguments = typeParameterNodes.length;\r\n      assert(expectedTypeArguments > 0);\r\n      let actualTypeArguments = typeArgumentNodes !== null ? typeArgumentNodes.length : 0;\r\n      if (expectedTypeArguments != actualTypeArguments) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, expectedTypeArguments.toString(10), actualTypeArguments.toString(10)\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      resolvedTypeArguments = this.resolveTypeArguments(\r\n        typeParameterNodes,\r\n        typeArgumentNodes,\r\n        contextualTypeArguments,\r\n        reportNode,\r\n        reportMode\r\n      );\r\n      if (!resolvedTypeArguments) return null;\r\n\r\n    // Otherwise make sure that no type arguments have been specified\r\n    } else {\r\n      if (typeArgumentNodes !== null && typeArgumentNodes.length) {\r\n        if (reportMode == ReportMode.REPORT) {\r\n          this.error(\r\n            DiagnosticCode.Type_0_is_not_generic,\r\n            reportNode.range, prototype.internalName\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n    }\r\n\r\n    // Continue with concrete types\r\n    return this.resolveClass(\r\n      prototype,\r\n      resolvedTypeArguments,\r\n      contextualTypeArguments,\r\n      reportMode\r\n    );\r\n  }\r\n}\r\n","/**\r\n * JavaScript glue code.\r\n * @module glue/js\r\n * @preferred\r\n *//***/\r\n\r\n/// <reference path=\"./node.d.ts\" />\r\n\r\nimport \"./binaryen\"; // must be first so portable can pick up the memory implementation\r\nimport \"../../../std/portable/index\";\r\nimport \"./float\";\r\nimport \"./i64\";\r\n\r\nimport { Module } from \"../../module\";\r\n\r\nModule.prototype.toText = function(this: Module) {\r\n  return new binaryen.Module(this.ref).emitText();\r\n};\r\n\r\nModule.prototype.toAsmjs = function(this: Module) {\r\n  return new binaryen.Module(this.ref).emitAsmjs();\r\n};\r\n","// Copy Binaryen exports to global scope\r\n\r\nconst binaryen = global.Binaryen || require(\"binaryen\");\r\nglobal.binaryen = binaryen;\r\n\r\nfor (var key in binaryen) {\r\n  if (key.startsWith(\"_Binaryen\") || key.startsWith(\"_Relooper\")) global[key] = binaryen[key];\r\n}\r\n\r\n// Utilize Binaryen's heap\r\n\r\nglobal.__memory_allocate = binaryen._malloc;\r\nglobal.__memory_free = binaryen._free;\r\nglobal.__memory_copy = binaryen._memmove;\r\nglobal.__store = function(ptr, val) { binaryen.HEAPU8[ptr] = val; };\r\nglobal.__load = function(ptr) { return binaryen.HEAPU8[ptr]; };\r\n","module.exports = __WEBPACK_EXTERNAL_MODULE__15__;","/** @module std/portable *//***/\r\n\r\nvar globalScope = typeof window !== \"undefined\" && window || typeof global !== \"undefined\" && global || self;\r\n\r\nglobalScope.ASC_TARGET = 0;\r\n\r\nObject.defineProperties(\r\n  globalScope[\"i8\"] = function i8(value) { return value << 24 >> 24; }\r\n, {\r\n  \"MIN_VALUE\": { value: -128, writable: false },\r\n  \"MAX_VALUE\": { value: 127, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"i16\"] = function i16(value) { return value << 16 >> 16; }\r\n, {\r\n  \"MIN_VALUE\": { value: -32768, writable: false },\r\n  \"MAX_VALUE\": { value: 32767, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"i32\"] = globalScope[\"isize\"] = function i32(value) { return value | 0; }\r\n, {\r\n  \"MIN_VALUE\": { value: -2147483648, writable: false },\r\n  \"MAX_VALUE\": { value: 2147483647, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"u8\"] = function u8(value) { return value & 0xff; }\r\n, {\r\n  \"MIN_VALUE\": { value: 0, writable: false },\r\n  \"MAX_VALUE\": { value: 255, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"u16\"] = function u16(value) { return value & 0xffff; }\r\n, {\r\n  \"MIN_VALUE\": { value: 0, writable: false },\r\n  \"MAX_VALUE\": { value: 65535, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"u32\"] = globalScope[\"usize\"] = function u32(value) { return value >>> 0; }\r\n, {\r\n  \"MIN_VALUE\": { value: 0, writable: false },\r\n  \"MAX_VALUE\": { value: 4294967295, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"bool\"] = function bool(value) { return !!value; }\r\n, {\r\n  \"MIN_VALUE\": { value: 0, writable: false },\r\n  \"MAX_VALUE\": { value: 1, writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"f32\"] = function f32(value) { return Math.fround(value); }\r\n, {\r\n  \"MIN_VALUE\": { value: Math.fround(-3.40282347e+38), writable: false },\r\n  \"MAX_VALUE\": { value: Math.fround(3.40282347e+38), writable: false },\r\n  \"MIN_POSITIVE_VALUE\": { value: Math.fround(1.175494351e-38), writable: false },\r\n  \"MIN_SAFE_INTEGER\": { value: -16777215, writable: false },\r\n  \"MAX_SAFE_INTEGER\": { value: 16777215, writable: false },\r\n  \"EPSILON\": { value: Math.fround(1.19209290e-07), writable: false }\r\n});\r\n\r\nObject.defineProperties(\r\n  globalScope[\"f64\"] = function f64(value) { return +value; }\r\n, {\r\n  \"MIN_VALUE\": { value: -1.7976931348623157e+308, writable: false },\r\n  \"MAX_VALUE\": { value: 1.7976931348623157e+308, writable: false },\r\n  \"MIN_POSITIVE_VALUE\": { value: 2.2250738585072014e-308 , writable: false },\r\n  \"MIN_SAFE_INTEGER\": { value: -9007199254740991, writable: false },\r\n  \"MAX_SAFE_INTEGER\": { value: 9007199254740991, writable: false },\r\n  \"EPSILON\": { value: 2.2204460492503131e-16, writable: false }\r\n});\r\n\r\nglobalScope[\"clz\"] = Math.clz32;\r\n\r\nglobalScope[\"ctz\"] = function ctz(value) {\r\n  var c = Math.clz32(value & -value);\r\n  return value ? 31 - c : c;\r\n};\r\n\r\nglobalScope[\"popcnt\"] = function popcnt(value) {\r\n  value -= value >>> 1 & 0x55555555;\r\n  value = (value & 0x33333333) + (value >>> 2 & 0x33333333);\r\n  return (((value + (value >>> 4)) & 0x0F0F0F0F) * 0x01010101) >>> 24;\r\n};\r\n\r\nglobalScope[\"rotl\"] = function rotl(value, shift) {\r\n  shift &= 31;\r\n  return (value << shift) | (value >>> (32 - shift));\r\n};\r\n\r\nglobalScope[\"rotr\"] = function rotr(value, shift) {\r\n  shift &= 31;\r\n  return (value >>> shift) | (value << (32 - shift));\r\n};\r\n\r\nglobalScope[\"abs\"] = Math.abs;\r\n\r\nglobalScope[\"max\"] = Math.max;\r\n\r\nglobalScope[\"min\"] = Math.min;\r\n\r\nglobalScope[\"ceil\"] = Math.ceil;\r\n\r\nglobalScope[\"floor\"] = Math.floor;\r\n\r\n// Adopt code from https://github.com/rfk/wasm-polyfill\r\nglobalScope[\"nearest\"] = function nearest(value) {\r\n  if (Math.abs(value - Math.trunc(value)) === 0.5) {\r\n    return 2.0 * Math.round(value * 0.5);\r\n  }\r\n  return Math.round(value);\r\n};\r\n\r\nglobalScope[\"select\"] = function select(ifTrue, ifFalse, condition) {\r\n  return condition ? ifTrue : ifFalse;\r\n};\r\n\r\nglobalScope[\"sqrt\"] = Math.sqrt;\r\n\r\nglobalScope[\"trunc\"] = Math.trunc;\r\n\r\nglobalScope[\"copysign\"] = function copysign(x, y) {\r\n  return Math.abs(x) * Math.sign(y);\r\n};\r\n\r\nglobalScope[\"bswap\"] = function bswap(value) {\r\n  var a = value >> 8 & 0x00FF00FF;\r\n  var b = (value & 0x00FF00FF) << 8;\r\n  value = a | b;\r\n  a = value >> 16 & 0x0000FFFF;\r\n  b = (value & 0x0000FFFF) << 16;\r\n  return a | b;\r\n};\r\n\r\nglobalScope[\"bswap16\"] = function bswap16(value) {\r\n  return ((value << 8) & 0xFF00) | ((value >> 8) & 0x00FF) | (value & 0xFFFF0000);\r\n};\r\n\r\nfunction UnreachableError() {\r\n  if (Error.captureStackTrace) {\r\n    Error.captureStackTrace(this, UnreachableError);\r\n  } else {\r\n    this.stack = this.name + \": \" + this.message + \"\\n\" + new Error().stack;\r\n  }\r\n}\r\nUnreachableError.prototype = Object.create(Error.prototype);\r\nUnreachableError.prototype.name = \"UnreachableError\";\r\nUnreachableError.prototype.message = \"unreachable\";\r\n\r\nglobalScope[\"unreachable\"] = function unreachable() {\r\n  throw new UnreachableError();\r\n};\r\n\r\nfunction AssertionError(message) {\r\n  this.message = message || \"assertion failed\";\r\n  if (Error.captureStackTrace) {\r\n    Error.captureStackTrace(this, AssertionError);\r\n  } else {\r\n    this.stack = this.name + \": \" + this.message + \"\\n\" + new Error().stack;\r\n  }\r\n}\r\nAssertionError.prototype = Object.create(Error.prototype);\r\nAssertionError.prototype.name = \"AssertionError\";\r\n\r\nglobalScope[\"assert\"] = function assert(isTrueish, message) {\r\n  if (isTrueish) return isTrueish;\r\n  throw new AssertionError(message);\r\n};\r\n\r\nglobalScope[\"changetype\"] = function changetype(value) {\r\n  return value;\r\n};\r\n\r\nglobalScope[\"parseI32\"] = function parseI32(str, radix) {\r\n  return parseInt(str, undefined) | 0;\r\n};\r\n\r\nString[\"fromCharCodes\"] = function fromCharCodes(arr) {\r\n  return String.fromCharCode.apply(String, arr);\r\n};\r\n\r\nString[\"fromCodePoints\"] = function fromCodePoints(arr) {\r\n  return String.fromCodePoint.apply(String, arr);\r\n};\r\n\r\nglobalScope[\"isInteger\"] = Number.isInteger;\r\n\r\nglobalScope[\"isFloat\"] = function isFloat(arg) {\r\n  return typeof arg === \"number\";\r\n};\r\n\r\nglobalScope[\"isReference\"] = function isClass(arg) {\r\n  return typeof arg === \"object\" || typeof arg === \"string\";\r\n};\r\n\r\nglobalScope[\"isString\"] = function isString(arg) {\r\n  return typeof arg === \"string\" || arg instanceof String;\r\n};\r\n\r\nglobalScope[\"isArray\"] = Array.isArray;\r\n\r\nglobalScope[\"unchecked\"] = function(expr) {\r\n  return expr;\r\n};\r\n\r\nglobalScope[\"fmod\"] = function fmod(x, y) {\r\n  return x % y;\r\n};\r\n\r\nglobalScope[\"fmodf\"] = function fmodf(x, y) {\r\n  return Math.fround(x % y);\r\n};\r\n\r\nglobalScope[\"JSMath\"] = Math;\r\n\r\nglobalScope[\"memory\"] = (() => {\r\n  var HEAP = new Uint8Array(0);\r\n  var HEAP_OFFSET = 0;\r\n  return {\r\n    allocate: globalScope[\"__memory_allocate\"] || function allocate(size) {\r\n      if (!(size >>>= 0)) return 0;\r\n      if (HEAP_OFFSET + size > HEAP.length) {\r\n        var oldHeap = HEAP;\r\n        HEAP = new Uint8Array(Math.max(65536, HEAP.length + size, HEAP.length * 2));\r\n        HEAP.set(oldHeap);\r\n      }\r\n      var ptr = HEAP_OFFSET;\r\n      if ((HEAP_OFFSET += size) & 7) HEAP_OFFSET = (HEAP_OFFSET | 7) + 1;\r\n      return ptr;\r\n    },\r\n    free: globalScope[\"__memory_free\"] || function free(ptr) { },\r\n    copy: globalScope[\"__memory_copy\"] || function copy(dest, src, size) {\r\n      HEAP.copyWithin(dest, src, src + size);\r\n    }\r\n  };\r\n})();\r\n\r\nglobalScope[\"store\"] = globalScope[\"__store\"] || function store(ptr, value, offset) {\r\n  HEAP[ptr + (offset | 0)] = value;\r\n};\r\n\r\nglobalScope[\"load\"] = globalScope[\"__load\"] || function load(ptr, offset) {\r\n  return HEAP[ptr + (offset | 0)];\r\n};\r\n","const F64 = new Float64Array(1);\r\nconst F32 = new Float32Array(F64.buffer);\r\nconst I32 = new Int32Array(F64.buffer);\r\n\r\nglobal.f32_as_i32 = function(value) {\r\n  F32[0] = value;\r\n  return I32[0];\r\n};\r\n\r\nglobal.i32_as_f32 = function(value) {\r\n  I32[0] = value;\r\n  return F32[0];\r\n};\r\n\r\nglobal.f64_as_i64 = function(value) {\r\n  F64[0] = value;\r\n  return i64_new(I32[0], I32[1]);\r\n};\r\n\r\nglobal.i64_as_f64 = function(value) {\r\n  I32[0] = i64_low(value);\r\n  I32[1] = i64_high(value);\r\n  return F64[0];\r\n};\r\n","const Long = global.Long || require(\"long\");\r\n\r\nglobal.i64_zero = Long.ZERO;\r\n\r\nglobal.i64_one = Long.ONE;\r\n\r\nglobal.i64_new = function(lo, hi) {\r\n  return Long.fromBits(lo, hi);\r\n};\r\n\r\nglobal.i64_low = function(value) {\r\n  return value.low;\r\n};\r\n\r\nglobal.i64_high = function(value) {\r\n  return value.high;\r\n};\r\n\r\nglobal.i64_add = function(left, right) {\r\n  return left.add(right);\r\n};\r\n\r\nglobal.i64_sub = function(left, right) {\r\n  return left.sub(right);\r\n};\r\n\r\nglobal.i64_mul = function(left, right) {\r\n  return left.mul(right);\r\n};\r\n\r\nglobal.i64_div = function(left, right) {\r\n  return left.div(right);\r\n};\r\n\r\nglobal.i64_div_u = function(left, right) {\r\n  return left.toUnsigned().div(right.toUnsigned()).toSigned();\r\n};\r\n\r\nglobal.i64_rem = function(left, right) {\r\n  return left.mod(right);\r\n};\r\n\r\nglobal.i64_rem_u = function(left, right) {\r\n  return left.toUnsigned().mod(right.toUnsigned()).toSigned();\r\n};\r\n\r\nglobal.i64_and = function(left, right) {\r\n  return left.and(right);\r\n};\r\n\r\nglobal.i64_or = function(left, right) {\r\n  return left.or(right);\r\n};\r\n\r\nglobal.i64_xor = function(left, right) {\r\n  return left.xor(right);\r\n};\r\n\r\nglobal.i64_shl = function(left, right) {\r\n  return left.shl(right);\r\n};\r\n\r\nglobal.i64_shr = function(left, right) {\r\n  return left.shr(right);\r\n};\r\n\r\nglobal.i64_shr_u = function(left, right) {\r\n  return left.shru(right);\r\n};\r\n\r\nglobal.i64_not = function(value) {\r\n  return value.not();\r\n};\r\n\r\nglobal.i64_eq = function(left, right) {\r\n  return left.eq(right);\r\n};\r\n\r\nglobal.i64_ne = function(left, right) {\r\n  return left.ne(right);\r\n};\r\n\r\nglobal.i64_align = function(value, alignment) {\r\n  assert(alignment && (alignment & (alignment - 1)) == 0);\r\n  var mask = Long.fromInt(alignment - 1);\r\n  return value.add(mask).and(mask.not());\r\n};\r\n\r\nglobal.i64_is_i8 = function(value) {\r\n  return value.high === 0 && (value.low >= 0 && value.low <= i8.MAX_VALUE)\r\n      || value.high === -1 && (value.low >= i8.MIN_VALUE && value.low < 0);\r\n};\r\n\r\nglobal.i64_is_i16 = function(value) {\r\n  return value.high === 0 && (value.low >= 0 && value.low <= i16.MAX_VALUE)\r\n      || value.high === -1 && (value.low >= i16.MIN_VALUE && value.low < 0);\r\n};\r\n\r\nglobal.i64_is_i32 = function(value) {\r\n  return (value.high === 0 && value.low >= 0)\r\n      || (value.high === -1 && value.low < 0);\r\n};\r\n\r\nglobal.i64_is_u8 = function(value) {\r\n  return value.high === 0 && value.low >= 0 && value.low <= u8.MAX_VALUE;\r\n};\r\n\r\nglobal.i64_is_u16 = function(value) {\r\n  return value.high === 0 && value.low >= 0 && value.low <= u16.MAX_VALUE;\r\n};\r\n\r\nglobal.i64_is_u32 = function(value) {\r\n  return value.high === 0;\r\n};\r\n\r\nglobal.i64_is_bool = function(value) {\r\n  return value.high === 0 && (value.low === 0 || value.low === 1);\r\n};\r\n\r\nconst minSafeF32 = Long.fromNumber(f32.MIN_SAFE_INTEGER);\r\nconst maxSafeF32 = Long.fromNumber(f32.MAX_SAFE_INTEGER);\r\n\r\nglobal.i64_is_f32 = function(value) {\r\n  return value.gte(minSafeF32) && value.lte(maxSafeF32);\r\n};\r\n\r\nconst minSafeF64 = Long.fromNumber(f64.MIN_SAFE_INTEGER);\r\nconst maxSafeF64 = Long.fromNumber(f64.MAX_SAFE_INTEGER);\r\n\r\nglobal.i64_is_f64 = function(value) {\r\n  return value.gte(minSafeF64) && value.lte(maxSafeF64);\r\n};\r\n\r\nglobal.i64_to_f32 = function(value) {\r\n  return global.Math.fround(value.toNumber());\r\n};\r\n\r\nglobal.i64_to_f64 = function(value) {\r\n  return value.toNumber();\r\n};\r\n\r\nglobal.i64_to_string = function(value, unsigned) {\r\n  return (unsigned ? value.toUnsigned() : value).toString(10);\r\n};\r\n","module.exports = Long;\r\n\r\n/**\r\n * wasm optimizations, to do native i64 multiplication and divide\r\n */\r\nvar wasm = null;\r\n\r\ntry {\r\n  wasm = new WebAssembly.Instance(new WebAssembly.Module(new Uint8Array([\r\n    0, 97, 115, 109, 1, 0, 0, 0, 1, 13, 2, 96, 0, 1, 127, 96, 4, 127, 127, 127, 127, 1, 127, 3, 7, 6, 0, 1, 1, 1, 1, 1, 6, 6, 1, 127, 1, 65, 0, 11, 7, 50, 6, 3, 109, 117, 108, 0, 1, 5, 100, 105, 118, 95, 115, 0, 2, 5, 100, 105, 118, 95, 117, 0, 3, 5, 114, 101, 109, 95, 115, 0, 4, 5, 114, 101, 109, 95, 117, 0, 5, 8, 103, 101, 116, 95, 104, 105, 103, 104, 0, 0, 10, 191, 1, 6, 4, 0, 35, 0, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 126, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 127, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 128, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 129, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11, 36, 1, 1, 126, 32, 0, 173, 32, 1, 173, 66, 32, 134, 132, 32, 2, 173, 32, 3, 173, 66, 32, 134, 132, 130, 34, 4, 66, 32, 135, 167, 36, 0, 32, 4, 167, 11\r\n  ])), {}).exports;\r\n} catch (e) {\r\n  // no wasm support :(\r\n}\r\n\r\n/**\r\n * Constructs a 64 bit two's-complement integer, given its low and high 32 bit values as *signed* integers.\r\n *  See the from* functions below for more convenient ways of constructing Longs.\r\n * @exports Long\r\n * @class A Long class for representing a 64 bit two's-complement integer value.\r\n * @param {number} low The low (signed) 32 bits of the long\r\n * @param {number} high The high (signed) 32 bits of the long\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @constructor\r\n */\r\nfunction Long(low, high, unsigned) {\r\n\r\n    /**\r\n     * The low 32 bits as a signed value.\r\n     * @type {number}\r\n     */\r\n    this.low = low | 0;\r\n\r\n    /**\r\n     * The high 32 bits as a signed value.\r\n     * @type {number}\r\n     */\r\n    this.high = high | 0;\r\n\r\n    /**\r\n     * Whether unsigned or not.\r\n     * @type {boolean}\r\n     */\r\n    this.unsigned = !!unsigned;\r\n}\r\n\r\n// The internal representation of a long is the two given signed, 32-bit values.\r\n// We use 32-bit pieces because these are the size of integers on which\r\n// Javascript performs bit-operations.  For operations like addition and\r\n// multiplication, we split each number into 16 bit pieces, which can easily be\r\n// multiplied within Javascript's floating-point representation without overflow\r\n// or change in sign.\r\n//\r\n// In the algorithms below, we frequently reduce the negative case to the\r\n// positive case by negating the input(s) and then post-processing the result.\r\n// Note that we must ALWAYS check specially whether those values are MIN_VALUE\r\n// (-2^63) because -MIN_VALUE == MIN_VALUE (since 2^63 cannot be represented as\r\n// a positive number, it overflows back into a negative).  Not handling this\r\n// case would often result in infinite recursion.\r\n//\r\n// Common constant values ZERO, ONE, NEG_ONE, etc. are defined below the from*\r\n// methods on which they depend.\r\n\r\n/**\r\n * An indicator used to reliably determine if an object is a Long or not.\r\n * @type {boolean}\r\n * @const\r\n * @private\r\n */\r\nLong.prototype.__isLong__;\r\n\r\nObject.defineProperty(Long.prototype, \"__isLong__\", { value: true });\r\n\r\n/**\r\n * @function\r\n * @param {*} obj Object\r\n * @returns {boolean}\r\n * @inner\r\n */\r\nfunction isLong(obj) {\r\n    return (obj && obj[\"__isLong__\"]) === true;\r\n}\r\n\r\n/**\r\n * Tests if the specified object is a Long.\r\n * @function\r\n * @param {*} obj Object\r\n * @returns {boolean}\r\n */\r\nLong.isLong = isLong;\r\n\r\n/**\r\n * A cache of the Long representations of small integer values.\r\n * @type {!Object}\r\n * @inner\r\n */\r\nvar INT_CACHE = {};\r\n\r\n/**\r\n * A cache of the Long representations of small unsigned integer values.\r\n * @type {!Object}\r\n * @inner\r\n */\r\nvar UINT_CACHE = {};\r\n\r\n/**\r\n * @param {number} value\r\n * @param {boolean=} unsigned\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromInt(value, unsigned) {\r\n    var obj, cachedObj, cache;\r\n    if (unsigned) {\r\n        value >>>= 0;\r\n        if (cache = (0 <= value && value < 256)) {\r\n            cachedObj = UINT_CACHE[value];\r\n            if (cachedObj)\r\n                return cachedObj;\r\n        }\r\n        obj = fromBits(value, (value | 0) < 0 ? -1 : 0, true);\r\n        if (cache)\r\n            UINT_CACHE[value] = obj;\r\n        return obj;\r\n    } else {\r\n        value |= 0;\r\n        if (cache = (-128 <= value && value < 128)) {\r\n            cachedObj = INT_CACHE[value];\r\n            if (cachedObj)\r\n                return cachedObj;\r\n        }\r\n        obj = fromBits(value, value < 0 ? -1 : 0, false);\r\n        if (cache)\r\n            INT_CACHE[value] = obj;\r\n        return obj;\r\n    }\r\n}\r\n\r\n/**\r\n * Returns a Long representing the given 32 bit integer value.\r\n * @function\r\n * @param {number} value The 32 bit integer in question\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {!Long} The corresponding Long value\r\n */\r\nLong.fromInt = fromInt;\r\n\r\n/**\r\n * @param {number} value\r\n * @param {boolean=} unsigned\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromNumber(value, unsigned) {\r\n    if (isNaN(value))\r\n        return unsigned ? UZERO : ZERO;\r\n    if (unsigned) {\r\n        if (value < 0)\r\n            return UZERO;\r\n        if (value >= TWO_PWR_64_DBL)\r\n            return MAX_UNSIGNED_VALUE;\r\n    } else {\r\n        if (value <= -TWO_PWR_63_DBL)\r\n            return MIN_VALUE;\r\n        if (value + 1 >= TWO_PWR_63_DBL)\r\n            return MAX_VALUE;\r\n    }\r\n    if (value < 0)\r\n        return fromNumber(-value, unsigned).neg();\r\n    return fromBits((value % TWO_PWR_32_DBL) | 0, (value / TWO_PWR_32_DBL) | 0, unsigned);\r\n}\r\n\r\n/**\r\n * Returns a Long representing the given value, provided that it is a finite number. Otherwise, zero is returned.\r\n * @function\r\n * @param {number} value The number in question\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {!Long} The corresponding Long value\r\n */\r\nLong.fromNumber = fromNumber;\r\n\r\n/**\r\n * @param {number} lowBits\r\n * @param {number} highBits\r\n * @param {boolean=} unsigned\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromBits(lowBits, highBits, unsigned) {\r\n    return new Long(lowBits, highBits, unsigned);\r\n}\r\n\r\n/**\r\n * Returns a Long representing the 64 bit integer that comes by concatenating the given low and high bits. Each is\r\n *  assumed to use 32 bits.\r\n * @function\r\n * @param {number} lowBits The low 32 bits\r\n * @param {number} highBits The high 32 bits\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {!Long} The corresponding Long value\r\n */\r\nLong.fromBits = fromBits;\r\n\r\n/**\r\n * @function\r\n * @param {number} base\r\n * @param {number} exponent\r\n * @returns {number}\r\n * @inner\r\n */\r\nvar pow_dbl = Math.pow; // Used 4 times (4*8 to 15+4)\r\n\r\n/**\r\n * @param {string} str\r\n * @param {(boolean|number)=} unsigned\r\n * @param {number=} radix\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromString(str, unsigned, radix) {\r\n    if (str.length === 0)\r\n        throw Error('empty string');\r\n    if (str === \"NaN\" || str === \"Infinity\" || str === \"+Infinity\" || str === \"-Infinity\")\r\n        return ZERO;\r\n    if (typeof unsigned === 'number') {\r\n        // For goog.math.long compatibility\r\n        radix = unsigned,\r\n        unsigned = false;\r\n    } else {\r\n        unsigned = !! unsigned;\r\n    }\r\n    radix = radix || 10;\r\n    if (radix < 2 || 36 < radix)\r\n        throw RangeError('radix');\r\n\r\n    var p;\r\n    if ((p = str.indexOf('-')) > 0)\r\n        throw Error('interior hyphen');\r\n    else if (p === 0) {\r\n        return fromString(str.substring(1), unsigned, radix).neg();\r\n    }\r\n\r\n    // Do several (8) digits each time through the loop, so as to\r\n    // minimize the calls to the very expensive emulated div.\r\n    var radixToPower = fromNumber(pow_dbl(radix, 8));\r\n\r\n    var result = ZERO;\r\n    for (var i = 0; i < str.length; i += 8) {\r\n        var size = Math.min(8, str.length - i),\r\n            value = parseInt(str.substring(i, i + size), radix);\r\n        if (size < 8) {\r\n            var power = fromNumber(pow_dbl(radix, size));\r\n            result = result.mul(power).add(fromNumber(value));\r\n        } else {\r\n            result = result.mul(radixToPower);\r\n            result = result.add(fromNumber(value));\r\n        }\r\n    }\r\n    result.unsigned = unsigned;\r\n    return result;\r\n}\r\n\r\n/**\r\n * Returns a Long representation of the given string, written using the specified radix.\r\n * @function\r\n * @param {string} str The textual representation of the Long\r\n * @param {(boolean|number)=} unsigned Whether unsigned or not, defaults to signed\r\n * @param {number=} radix The radix in which the text is written (2-36), defaults to 10\r\n * @returns {!Long} The corresponding Long value\r\n */\r\nLong.fromString = fromString;\r\n\r\n/**\r\n * @function\r\n * @param {!Long|number|string|!{low: number, high: number, unsigned: boolean}} val\r\n * @param {boolean=} unsigned\r\n * @returns {!Long}\r\n * @inner\r\n */\r\nfunction fromValue(val, unsigned) {\r\n    if (typeof val === 'number')\r\n        return fromNumber(val, unsigned);\r\n    if (typeof val === 'string')\r\n        return fromString(val, unsigned);\r\n    // Throws for non-objects, converts non-instanceof Long:\r\n    return fromBits(val.low, val.high, typeof unsigned === 'boolean' ? unsigned : val.unsigned);\r\n}\r\n\r\n/**\r\n * Converts the specified value to a Long using the appropriate from* function for its type.\r\n * @function\r\n * @param {!Long|number|string|!{low: number, high: number, unsigned: boolean}} val Value\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {!Long}\r\n */\r\nLong.fromValue = fromValue;\r\n\r\n// NOTE: the compiler should inline these constant values below and then remove these variables, so there should be\r\n// no runtime penalty for these.\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_16_DBL = 1 << 16;\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_24_DBL = 1 << 24;\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_32_DBL = TWO_PWR_16_DBL * TWO_PWR_16_DBL;\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_64_DBL = TWO_PWR_32_DBL * TWO_PWR_32_DBL;\r\n\r\n/**\r\n * @type {number}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_63_DBL = TWO_PWR_64_DBL / 2;\r\n\r\n/**\r\n * @type {!Long}\r\n * @const\r\n * @inner\r\n */\r\nvar TWO_PWR_24 = fromInt(TWO_PWR_24_DBL);\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar ZERO = fromInt(0);\r\n\r\n/**\r\n * Signed zero.\r\n * @type {!Long}\r\n */\r\nLong.ZERO = ZERO;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar UZERO = fromInt(0, true);\r\n\r\n/**\r\n * Unsigned zero.\r\n * @type {!Long}\r\n */\r\nLong.UZERO = UZERO;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar ONE = fromInt(1);\r\n\r\n/**\r\n * Signed one.\r\n * @type {!Long}\r\n */\r\nLong.ONE = ONE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar UONE = fromInt(1, true);\r\n\r\n/**\r\n * Unsigned one.\r\n * @type {!Long}\r\n */\r\nLong.UONE = UONE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar NEG_ONE = fromInt(-1);\r\n\r\n/**\r\n * Signed negative one.\r\n * @type {!Long}\r\n */\r\nLong.NEG_ONE = NEG_ONE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar MAX_VALUE = fromBits(0xFFFFFFFF|0, 0x7FFFFFFF|0, false);\r\n\r\n/**\r\n * Maximum signed value.\r\n * @type {!Long}\r\n */\r\nLong.MAX_VALUE = MAX_VALUE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar MAX_UNSIGNED_VALUE = fromBits(0xFFFFFFFF|0, 0xFFFFFFFF|0, true);\r\n\r\n/**\r\n * Maximum unsigned value.\r\n * @type {!Long}\r\n */\r\nLong.MAX_UNSIGNED_VALUE = MAX_UNSIGNED_VALUE;\r\n\r\n/**\r\n * @type {!Long}\r\n * @inner\r\n */\r\nvar MIN_VALUE = fromBits(0, 0x80000000|0, false);\r\n\r\n/**\r\n * Minimum signed value.\r\n * @type {!Long}\r\n */\r\nLong.MIN_VALUE = MIN_VALUE;\r\n\r\n/**\r\n * @alias Long.prototype\r\n * @inner\r\n */\r\nvar LongPrototype = Long.prototype;\r\n\r\n/**\r\n * Converts the Long to a 32 bit integer, assuming it is a 32 bit integer.\r\n * @returns {number}\r\n */\r\nLongPrototype.toInt = function toInt() {\r\n    return this.unsigned ? this.low >>> 0 : this.low;\r\n};\r\n\r\n/**\r\n * Converts the Long to a the nearest floating-point representation of this value (double, 53 bit mantissa).\r\n * @returns {number}\r\n */\r\nLongPrototype.toNumber = function toNumber() {\r\n    if (this.unsigned)\r\n        return ((this.high >>> 0) * TWO_PWR_32_DBL) + (this.low >>> 0);\r\n    return this.high * TWO_PWR_32_DBL + (this.low >>> 0);\r\n};\r\n\r\n/**\r\n * Converts the Long to a string written in the specified radix.\r\n * @param {number=} radix Radix (2-36), defaults to 10\r\n * @returns {string}\r\n * @override\r\n * @throws {RangeError} If `radix` is out of range\r\n */\r\nLongPrototype.toString = function toString(radix) {\r\n    radix = radix || 10;\r\n    if (radix < 2 || 36 < radix)\r\n        throw RangeError('radix');\r\n    if (this.isZero())\r\n        return '0';\r\n    if (this.isNegative()) { // Unsigned Longs are never negative\r\n        if (this.eq(MIN_VALUE)) {\r\n            // We need to change the Long value before it can be negated, so we remove\r\n            // the bottom-most digit in this base and then recurse to do the rest.\r\n            var radixLong = fromNumber(radix),\r\n                div = this.div(radixLong),\r\n                rem1 = div.mul(radixLong).sub(this);\r\n            return div.toString(radix) + rem1.toInt().toString(radix);\r\n        } else\r\n            return '-' + this.neg().toString(radix);\r\n    }\r\n\r\n    // Do several (6) digits each time through the loop, so as to\r\n    // minimize the calls to the very expensive emulated div.\r\n    var radixToPower = fromNumber(pow_dbl(radix, 6), this.unsigned),\r\n        rem = this;\r\n    var result = '';\r\n    while (true) {\r\n        var remDiv = rem.div(radixToPower),\r\n            intval = rem.sub(remDiv.mul(radixToPower)).toInt() >>> 0,\r\n            digits = intval.toString(radix);\r\n        rem = remDiv;\r\n        if (rem.isZero())\r\n            return digits + result;\r\n        else {\r\n            while (digits.length < 6)\r\n                digits = '0' + digits;\r\n            result = '' + digits + result;\r\n        }\r\n    }\r\n};\r\n\r\n/**\r\n * Gets the high 32 bits as a signed integer.\r\n * @returns {number} Signed high bits\r\n */\r\nLongPrototype.getHighBits = function getHighBits() {\r\n    return this.high;\r\n};\r\n\r\n/**\r\n * Gets the high 32 bits as an unsigned integer.\r\n * @returns {number} Unsigned high bits\r\n */\r\nLongPrototype.getHighBitsUnsigned = function getHighBitsUnsigned() {\r\n    return this.high >>> 0;\r\n};\r\n\r\n/**\r\n * Gets the low 32 bits as a signed integer.\r\n * @returns {number} Signed low bits\r\n */\r\nLongPrototype.getLowBits = function getLowBits() {\r\n    return this.low;\r\n};\r\n\r\n/**\r\n * Gets the low 32 bits as an unsigned integer.\r\n * @returns {number} Unsigned low bits\r\n */\r\nLongPrototype.getLowBitsUnsigned = function getLowBitsUnsigned() {\r\n    return this.low >>> 0;\r\n};\r\n\r\n/**\r\n * Gets the number of bits needed to represent the absolute value of this Long.\r\n * @returns {number}\r\n */\r\nLongPrototype.getNumBitsAbs = function getNumBitsAbs() {\r\n    if (this.isNegative()) // Unsigned Longs are never negative\r\n        return this.eq(MIN_VALUE) ? 64 : this.neg().getNumBitsAbs();\r\n    var val = this.high != 0 ? this.high : this.low;\r\n    for (var bit = 31; bit > 0; bit--)\r\n        if ((val & (1 << bit)) != 0)\r\n            break;\r\n    return this.high != 0 ? bit + 33 : bit + 1;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value equals zero.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isZero = function isZero() {\r\n    return this.high === 0 && this.low === 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value equals zero. This is an alias of {@link Long#isZero}.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.eqz = LongPrototype.isZero;\r\n\r\n/**\r\n * Tests if this Long's value is negative.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isNegative = function isNegative() {\r\n    return !this.unsigned && this.high < 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is positive.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isPositive = function isPositive() {\r\n    return this.unsigned || this.high >= 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is odd.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isOdd = function isOdd() {\r\n    return (this.low & 1) === 1;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is even.\r\n * @returns {boolean}\r\n */\r\nLongPrototype.isEven = function isEven() {\r\n    return (this.low & 1) === 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value equals the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.equals = function equals(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    if (this.unsigned !== other.unsigned && (this.high >>> 31) === 1 && (other.high >>> 31) === 1)\r\n        return false;\r\n    return this.high === other.high && this.low === other.low;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value equals the specified's. This is an alias of {@link Long#equals}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.eq = LongPrototype.equals;\r\n\r\n/**\r\n * Tests if this Long's value differs from the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.notEquals = function notEquals(other) {\r\n    return !this.eq(/* validates */ other);\r\n};\r\n\r\n/**\r\n * Tests if this Long's value differs from the specified's. This is an alias of {@link Long#notEquals}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.neq = LongPrototype.notEquals;\r\n\r\n/**\r\n * Tests if this Long's value differs from the specified's. This is an alias of {@link Long#notEquals}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.ne = LongPrototype.notEquals;\r\n\r\n/**\r\n * Tests if this Long's value is less than the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.lessThan = function lessThan(other) {\r\n    return this.comp(/* validates */ other) < 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is less than the specified's. This is an alias of {@link Long#lessThan}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.lt = LongPrototype.lessThan;\r\n\r\n/**\r\n * Tests if this Long's value is less than or equal the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.lessThanOrEqual = function lessThanOrEqual(other) {\r\n    return this.comp(/* validates */ other) <= 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is less than or equal the specified's. This is an alias of {@link Long#lessThanOrEqual}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.lte = LongPrototype.lessThanOrEqual;\r\n\r\n/**\r\n * Tests if this Long's value is less than or equal the specified's. This is an alias of {@link Long#lessThanOrEqual}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.le = LongPrototype.lessThanOrEqual;\r\n\r\n/**\r\n * Tests if this Long's value is greater than the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.greaterThan = function greaterThan(other) {\r\n    return this.comp(/* validates */ other) > 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is greater than the specified's. This is an alias of {@link Long#greaterThan}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.gt = LongPrototype.greaterThan;\r\n\r\n/**\r\n * Tests if this Long's value is greater than or equal the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.greaterThanOrEqual = function greaterThanOrEqual(other) {\r\n    return this.comp(/* validates */ other) >= 0;\r\n};\r\n\r\n/**\r\n * Tests if this Long's value is greater than or equal the specified's. This is an alias of {@link Long#greaterThanOrEqual}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.gte = LongPrototype.greaterThanOrEqual;\r\n\r\n/**\r\n * Tests if this Long's value is greater than or equal the specified's. This is an alias of {@link Long#greaterThanOrEqual}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {boolean}\r\n */\r\nLongPrototype.ge = LongPrototype.greaterThanOrEqual;\r\n\r\n/**\r\n * Compares this Long's value with the specified's.\r\n * @param {!Long|number|string} other Other value\r\n * @returns {number} 0 if they are the same, 1 if the this is greater and -1\r\n *  if the given one is greater\r\n */\r\nLongPrototype.compare = function compare(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    if (this.eq(other))\r\n        return 0;\r\n    var thisNeg = this.isNegative(),\r\n        otherNeg = other.isNegative();\r\n    if (thisNeg && !otherNeg)\r\n        return -1;\r\n    if (!thisNeg && otherNeg)\r\n        return 1;\r\n    // At this point the sign bits are the same\r\n    if (!this.unsigned)\r\n        return this.sub(other).isNegative() ? -1 : 1;\r\n    // Both are positive if at least one is unsigned\r\n    return (other.high >>> 0) > (this.high >>> 0) || (other.high === this.high && (other.low >>> 0) > (this.low >>> 0)) ? -1 : 1;\r\n};\r\n\r\n/**\r\n * Compares this Long's value with the specified's. This is an alias of {@link Long#compare}.\r\n * @function\r\n * @param {!Long|number|string} other Other value\r\n * @returns {number} 0 if they are the same, 1 if the this is greater and -1\r\n *  if the given one is greater\r\n */\r\nLongPrototype.comp = LongPrototype.compare;\r\n\r\n/**\r\n * Negates this Long's value.\r\n * @returns {!Long} Negated Long\r\n */\r\nLongPrototype.negate = function negate() {\r\n    if (!this.unsigned && this.eq(MIN_VALUE))\r\n        return MIN_VALUE;\r\n    return this.not().add(ONE);\r\n};\r\n\r\n/**\r\n * Negates this Long's value. This is an alias of {@link Long#negate}.\r\n * @function\r\n * @returns {!Long} Negated Long\r\n */\r\nLongPrototype.neg = LongPrototype.negate;\r\n\r\n/**\r\n * Returns the sum of this and the specified Long.\r\n * @param {!Long|number|string} addend Addend\r\n * @returns {!Long} Sum\r\n */\r\nLongPrototype.add = function add(addend) {\r\n    if (!isLong(addend))\r\n        addend = fromValue(addend);\r\n\r\n    // Divide each number into 4 chunks of 16 bits, and then sum the chunks.\r\n\r\n    var a48 = this.high >>> 16;\r\n    var a32 = this.high & 0xFFFF;\r\n    var a16 = this.low >>> 16;\r\n    var a00 = this.low & 0xFFFF;\r\n\r\n    var b48 = addend.high >>> 16;\r\n    var b32 = addend.high & 0xFFFF;\r\n    var b16 = addend.low >>> 16;\r\n    var b00 = addend.low & 0xFFFF;\r\n\r\n    var c48 = 0, c32 = 0, c16 = 0, c00 = 0;\r\n    c00 += a00 + b00;\r\n    c16 += c00 >>> 16;\r\n    c00 &= 0xFFFF;\r\n    c16 += a16 + b16;\r\n    c32 += c16 >>> 16;\r\n    c16 &= 0xFFFF;\r\n    c32 += a32 + b32;\r\n    c48 += c32 >>> 16;\r\n    c32 &= 0xFFFF;\r\n    c48 += a48 + b48;\r\n    c48 &= 0xFFFF;\r\n    return fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the difference of this and the specified Long.\r\n * @param {!Long|number|string} subtrahend Subtrahend\r\n * @returns {!Long} Difference\r\n */\r\nLongPrototype.subtract = function subtract(subtrahend) {\r\n    if (!isLong(subtrahend))\r\n        subtrahend = fromValue(subtrahend);\r\n    return this.add(subtrahend.neg());\r\n};\r\n\r\n/**\r\n * Returns the difference of this and the specified Long. This is an alias of {@link Long#subtract}.\r\n * @function\r\n * @param {!Long|number|string} subtrahend Subtrahend\r\n * @returns {!Long} Difference\r\n */\r\nLongPrototype.sub = LongPrototype.subtract;\r\n\r\n/**\r\n * Returns the product of this and the specified Long.\r\n * @param {!Long|number|string} multiplier Multiplier\r\n * @returns {!Long} Product\r\n */\r\nLongPrototype.multiply = function multiply(multiplier) {\r\n    if (this.isZero())\r\n        return ZERO;\r\n    if (!isLong(multiplier))\r\n        multiplier = fromValue(multiplier);\r\n\r\n    // use wasm support if present\r\n    if (wasm) {\r\n        var low = wasm.mul(this.low,\r\n                           this.high,\r\n                           multiplier.low,\r\n                           multiplier.high);\r\n        return fromBits(low, wasm.get_high(), this.unsigned);\r\n    }\r\n\r\n    if (multiplier.isZero())\r\n        return ZERO;\r\n    if (this.eq(MIN_VALUE))\r\n        return multiplier.isOdd() ? MIN_VALUE : ZERO;\r\n    if (multiplier.eq(MIN_VALUE))\r\n        return this.isOdd() ? MIN_VALUE : ZERO;\r\n\r\n    if (this.isNegative()) {\r\n        if (multiplier.isNegative())\r\n            return this.neg().mul(multiplier.neg());\r\n        else\r\n            return this.neg().mul(multiplier).neg();\r\n    } else if (multiplier.isNegative())\r\n        return this.mul(multiplier.neg()).neg();\r\n\r\n    // If both longs are small, use float multiplication\r\n    if (this.lt(TWO_PWR_24) && multiplier.lt(TWO_PWR_24))\r\n        return fromNumber(this.toNumber() * multiplier.toNumber(), this.unsigned);\r\n\r\n    // Divide each long into 4 chunks of 16 bits, and then add up 4x4 products.\r\n    // We can skip products that would overflow.\r\n\r\n    var a48 = this.high >>> 16;\r\n    var a32 = this.high & 0xFFFF;\r\n    var a16 = this.low >>> 16;\r\n    var a00 = this.low & 0xFFFF;\r\n\r\n    var b48 = multiplier.high >>> 16;\r\n    var b32 = multiplier.high & 0xFFFF;\r\n    var b16 = multiplier.low >>> 16;\r\n    var b00 = multiplier.low & 0xFFFF;\r\n\r\n    var c48 = 0, c32 = 0, c16 = 0, c00 = 0;\r\n    c00 += a00 * b00;\r\n    c16 += c00 >>> 16;\r\n    c00 &= 0xFFFF;\r\n    c16 += a16 * b00;\r\n    c32 += c16 >>> 16;\r\n    c16 &= 0xFFFF;\r\n    c16 += a00 * b16;\r\n    c32 += c16 >>> 16;\r\n    c16 &= 0xFFFF;\r\n    c32 += a32 * b00;\r\n    c48 += c32 >>> 16;\r\n    c32 &= 0xFFFF;\r\n    c32 += a16 * b16;\r\n    c48 += c32 >>> 16;\r\n    c32 &= 0xFFFF;\r\n    c32 += a00 * b32;\r\n    c48 += c32 >>> 16;\r\n    c32 &= 0xFFFF;\r\n    c48 += a48 * b00 + a32 * b16 + a16 * b32 + a00 * b48;\r\n    c48 &= 0xFFFF;\r\n    return fromBits((c16 << 16) | c00, (c48 << 16) | c32, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the product of this and the specified Long. This is an alias of {@link Long#multiply}.\r\n * @function\r\n * @param {!Long|number|string} multiplier Multiplier\r\n * @returns {!Long} Product\r\n */\r\nLongPrototype.mul = LongPrototype.multiply;\r\n\r\n/**\r\n * Returns this Long divided by the specified. The result is signed if this Long is signed or\r\n *  unsigned if this Long is unsigned.\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Quotient\r\n */\r\nLongPrototype.divide = function divide(divisor) {\r\n    if (!isLong(divisor))\r\n        divisor = fromValue(divisor);\r\n    if (divisor.isZero())\r\n        throw Error('division by zero');\r\n\r\n    // use wasm support if present\r\n    if (wasm) {\r\n        // guard against signed division overflow: the largest\r\n        // negative number / -1 would be 1 larger than the largest\r\n        // positive number, due to two's complement.\r\n        if (!this.unsigned &&\r\n            this.high === -0x80000000 &&\r\n            divisor.low === -1 && divisor.high === -1) {\r\n            // be consistent with non-wasm code path\r\n            return this;\r\n        }\r\n        var low = (this.unsigned ? wasm.div_u : wasm.div_s)(\r\n            this.low,\r\n            this.high,\r\n            divisor.low,\r\n            divisor.high\r\n        );\r\n        return fromBits(low, wasm.get_high(), this.unsigned);\r\n    }\r\n\r\n    if (this.isZero())\r\n        return this.unsigned ? UZERO : ZERO;\r\n    var approx, rem, res;\r\n    if (!this.unsigned) {\r\n        // This section is only relevant for signed longs and is derived from the\r\n        // closure library as a whole.\r\n        if (this.eq(MIN_VALUE)) {\r\n            if (divisor.eq(ONE) || divisor.eq(NEG_ONE))\r\n                return MIN_VALUE;  // recall that -MIN_VALUE == MIN_VALUE\r\n            else if (divisor.eq(MIN_VALUE))\r\n                return ONE;\r\n            else {\r\n                // At this point, we have |other| >= 2, so |this/other| < |MIN_VALUE|.\r\n                var halfThis = this.shr(1);\r\n                approx = halfThis.div(divisor).shl(1);\r\n                if (approx.eq(ZERO)) {\r\n                    return divisor.isNegative() ? ONE : NEG_ONE;\r\n                } else {\r\n                    rem = this.sub(divisor.mul(approx));\r\n                    res = approx.add(rem.div(divisor));\r\n                    return res;\r\n                }\r\n            }\r\n        } else if (divisor.eq(MIN_VALUE))\r\n            return this.unsigned ? UZERO : ZERO;\r\n        if (this.isNegative()) {\r\n            if (divisor.isNegative())\r\n                return this.neg().div(divisor.neg());\r\n            return this.neg().div(divisor).neg();\r\n        } else if (divisor.isNegative())\r\n            return this.div(divisor.neg()).neg();\r\n        res = ZERO;\r\n    } else {\r\n        // The algorithm below has not been made for unsigned longs. It's therefore\r\n        // required to take special care of the MSB prior to running it.\r\n        if (!divisor.unsigned)\r\n            divisor = divisor.toUnsigned();\r\n        if (divisor.gt(this))\r\n            return UZERO;\r\n        if (divisor.gt(this.shru(1))) // 15 >>> 1 = 7 ; with divisor = 8 ; true\r\n            return UONE;\r\n        res = UZERO;\r\n    }\r\n\r\n    // Repeat the following until the remainder is less than other:  find a\r\n    // floating-point that approximates remainder / other *from below*, add this\r\n    // into the result, and subtract it from the remainder.  It is critical that\r\n    // the approximate value is less than or equal to the real value so that the\r\n    // remainder never becomes negative.\r\n    rem = this;\r\n    while (rem.gte(divisor)) {\r\n        // Approximate the result of division. This may be a little greater or\r\n        // smaller than the actual value.\r\n        approx = Math.max(1, Math.floor(rem.toNumber() / divisor.toNumber()));\r\n\r\n        // We will tweak the approximate result by changing it in the 48-th digit or\r\n        // the smallest non-fractional digit, whichever is larger.\r\n        var log2 = Math.ceil(Math.log(approx) / Math.LN2),\r\n            delta = (log2 <= 48) ? 1 : pow_dbl(2, log2 - 48),\r\n\r\n        // Decrease the approximation until it is smaller than the remainder.  Note\r\n        // that if it is too large, the product overflows and is negative.\r\n            approxRes = fromNumber(approx),\r\n            approxRem = approxRes.mul(divisor);\r\n        while (approxRem.isNegative() || approxRem.gt(rem)) {\r\n            approx -= delta;\r\n            approxRes = fromNumber(approx, this.unsigned);\r\n            approxRem = approxRes.mul(divisor);\r\n        }\r\n\r\n        // We know the answer can't be zero... and actually, zero would cause\r\n        // infinite recursion since we would make no progress.\r\n        if (approxRes.isZero())\r\n            approxRes = ONE;\r\n\r\n        res = res.add(approxRes);\r\n        rem = rem.sub(approxRem);\r\n    }\r\n    return res;\r\n};\r\n\r\n/**\r\n * Returns this Long divided by the specified. This is an alias of {@link Long#divide}.\r\n * @function\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Quotient\r\n */\r\nLongPrototype.div = LongPrototype.divide;\r\n\r\n/**\r\n * Returns this Long modulo the specified.\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Remainder\r\n */\r\nLongPrototype.modulo = function modulo(divisor) {\r\n    if (!isLong(divisor))\r\n        divisor = fromValue(divisor);\r\n\r\n    // use wasm support if present\r\n    if (wasm) {\r\n        var low = (this.unsigned ? wasm.rem_u : wasm.rem_s)(\r\n            this.low,\r\n            this.high,\r\n            divisor.low,\r\n            divisor.high\r\n        );\r\n        return fromBits(low, wasm.get_high(), this.unsigned);\r\n    }\r\n\r\n    return this.sub(this.div(divisor).mul(divisor));\r\n};\r\n\r\n/**\r\n * Returns this Long modulo the specified. This is an alias of {@link Long#modulo}.\r\n * @function\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Remainder\r\n */\r\nLongPrototype.mod = LongPrototype.modulo;\r\n\r\n/**\r\n * Returns this Long modulo the specified. This is an alias of {@link Long#modulo}.\r\n * @function\r\n * @param {!Long|number|string} divisor Divisor\r\n * @returns {!Long} Remainder\r\n */\r\nLongPrototype.rem = LongPrototype.modulo;\r\n\r\n/**\r\n * Returns the bitwise NOT of this Long.\r\n * @returns {!Long}\r\n */\r\nLongPrototype.not = function not() {\r\n    return fromBits(~this.low, ~this.high, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the bitwise AND of this Long and the specified.\r\n * @param {!Long|number|string} other Other Long\r\n * @returns {!Long}\r\n */\r\nLongPrototype.and = function and(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    return fromBits(this.low & other.low, this.high & other.high, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the bitwise OR of this Long and the specified.\r\n * @param {!Long|number|string} other Other Long\r\n * @returns {!Long}\r\n */\r\nLongPrototype.or = function or(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    return fromBits(this.low | other.low, this.high | other.high, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns the bitwise XOR of this Long and the given one.\r\n * @param {!Long|number|string} other Other Long\r\n * @returns {!Long}\r\n */\r\nLongPrototype.xor = function xor(other) {\r\n    if (!isLong(other))\r\n        other = fromValue(other);\r\n    return fromBits(this.low ^ other.low, this.high ^ other.high, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns this Long with bits shifted to the left by the given amount.\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shiftLeft = function shiftLeft(numBits) {\r\n    if (isLong(numBits))\r\n        numBits = numBits.toInt();\r\n    if ((numBits &= 63) === 0)\r\n        return this;\r\n    else if (numBits < 32)\r\n        return fromBits(this.low << numBits, (this.high << numBits) | (this.low >>> (32 - numBits)), this.unsigned);\r\n    else\r\n        return fromBits(0, this.low << (numBits - 32), this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns this Long with bits shifted to the left by the given amount. This is an alias of {@link Long#shiftLeft}.\r\n * @function\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shl = LongPrototype.shiftLeft;\r\n\r\n/**\r\n * Returns this Long with bits arithmetically shifted to the right by the given amount.\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shiftRight = function shiftRight(numBits) {\r\n    if (isLong(numBits))\r\n        numBits = numBits.toInt();\r\n    if ((numBits &= 63) === 0)\r\n        return this;\r\n    else if (numBits < 32)\r\n        return fromBits((this.low >>> numBits) | (this.high << (32 - numBits)), this.high >> numBits, this.unsigned);\r\n    else\r\n        return fromBits(this.high >> (numBits - 32), this.high >= 0 ? 0 : -1, this.unsigned);\r\n};\r\n\r\n/**\r\n * Returns this Long with bits arithmetically shifted to the right by the given amount. This is an alias of {@link Long#shiftRight}.\r\n * @function\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shr = LongPrototype.shiftRight;\r\n\r\n/**\r\n * Returns this Long with bits logically shifted to the right by the given amount.\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shiftRightUnsigned = function shiftRightUnsigned(numBits) {\r\n    if (isLong(numBits))\r\n        numBits = numBits.toInt();\r\n    numBits &= 63;\r\n    if (numBits === 0)\r\n        return this;\r\n    else {\r\n        var high = this.high;\r\n        if (numBits < 32) {\r\n            var low = this.low;\r\n            return fromBits((low >>> numBits) | (high << (32 - numBits)), high >>> numBits, this.unsigned);\r\n        } else if (numBits === 32)\r\n            return fromBits(high, 0, this.unsigned);\r\n        else\r\n            return fromBits(high >>> (numBits - 32), 0, this.unsigned);\r\n    }\r\n};\r\n\r\n/**\r\n * Returns this Long with bits logically shifted to the right by the given amount. This is an alias of {@link Long#shiftRightUnsigned}.\r\n * @function\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shru = LongPrototype.shiftRightUnsigned;\r\n\r\n/**\r\n * Returns this Long with bits logically shifted to the right by the given amount. This is an alias of {@link Long#shiftRightUnsigned}.\r\n * @function\r\n * @param {number|!Long} numBits Number of bits\r\n * @returns {!Long} Shifted Long\r\n */\r\nLongPrototype.shr_u = LongPrototype.shiftRightUnsigned;\r\n\r\n/**\r\n * Converts this Long to signed.\r\n * @returns {!Long} Signed long\r\n */\r\nLongPrototype.toSigned = function toSigned() {\r\n    if (!this.unsigned)\r\n        return this;\r\n    return fromBits(this.low, this.high, false);\r\n};\r\n\r\n/**\r\n * Converts this Long to unsigned.\r\n * @returns {!Long} Unsigned long\r\n */\r\nLongPrototype.toUnsigned = function toUnsigned() {\r\n    if (this.unsigned)\r\n        return this;\r\n    return fromBits(this.low, this.high, true);\r\n};\r\n\r\n/**\r\n * Converts this Long to its byte representation.\r\n * @param {boolean=} le Whether little or big endian, defaults to big endian\r\n * @returns {!Array.<number>} Byte representation\r\n */\r\nLongPrototype.toBytes = function toBytes(le) {\r\n    return le ? this.toBytesLE() : this.toBytesBE();\r\n};\r\n\r\n/**\r\n * Converts this Long to its little endian byte representation.\r\n * @returns {!Array.<number>} Little endian byte representation\r\n */\r\nLongPrototype.toBytesLE = function toBytesLE() {\r\n    var hi = this.high,\r\n        lo = this.low;\r\n    return [\r\n        lo        & 0xff,\r\n        lo >>>  8 & 0xff,\r\n        lo >>> 16 & 0xff,\r\n        lo >>> 24       ,\r\n        hi        & 0xff,\r\n        hi >>>  8 & 0xff,\r\n        hi >>> 16 & 0xff,\r\n        hi >>> 24\r\n    ];\r\n};\r\n\r\n/**\r\n * Converts this Long to its big endian byte representation.\r\n * @returns {!Array.<number>} Big endian byte representation\r\n */\r\nLongPrototype.toBytesBE = function toBytesBE() {\r\n    var hi = this.high,\r\n        lo = this.low;\r\n    return [\r\n        hi >>> 24       ,\r\n        hi >>> 16 & 0xff,\r\n        hi >>>  8 & 0xff,\r\n        hi        & 0xff,\r\n        lo >>> 24       ,\r\n        lo >>> 16 & 0xff,\r\n        lo >>>  8 & 0xff,\r\n        lo        & 0xff\r\n    ];\r\n};\r\n\r\n/**\r\n * Creates a Long from its byte representation.\r\n * @param {!Array.<number>} bytes Byte representation\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @param {boolean=} le Whether little or big endian, defaults to big endian\r\n * @returns {Long} The corresponding Long value\r\n */\r\nLong.fromBytes = function fromBytes(bytes, unsigned, le) {\r\n    return le ? Long.fromBytesLE(bytes, unsigned) : Long.fromBytesBE(bytes, unsigned);\r\n};\r\n\r\n/**\r\n * Creates a Long from its little endian byte representation.\r\n * @param {!Array.<number>} bytes Little endian byte representation\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {Long} The corresponding Long value\r\n */\r\nLong.fromBytesLE = function fromBytesLE(bytes, unsigned) {\r\n    return new Long(\r\n        bytes[0]       |\r\n        bytes[1] <<  8 |\r\n        bytes[2] << 16 |\r\n        bytes[3] << 24,\r\n        bytes[4]       |\r\n        bytes[5] <<  8 |\r\n        bytes[6] << 16 |\r\n        bytes[7] << 24,\r\n        unsigned\r\n    );\r\n};\r\n\r\n/**\r\n * Creates a Long from its big endian byte representation.\r\n * @param {!Array.<number>} bytes Big endian byte representation\r\n * @param {boolean=} unsigned Whether unsigned or not, defaults to signed\r\n * @returns {Long} The corresponding Long value\r\n */\r\nLong.fromBytesBE = function fromBytesBE(bytes, unsigned) {\r\n    return new Long(\r\n        bytes[4] << 24 |\r\n        bytes[5] << 16 |\r\n        bytes[6] <<  8 |\r\n        bytes[7],\r\n        bytes[0] << 24 |\r\n        bytes[1] << 16 |\r\n        bytes[2] <<  8 |\r\n        bytes[3],\r\n        unsigned\r\n    );\r\n};\r\n","/**\r\n * Built-in elements providing WebAssembly core functionality.\r\n * @module builtins\r\n *//***/\r\n\r\n import {\r\n  Compiler,\r\n  ConversionKind,\r\n  WrapMode\r\n} from \"./compiler\";\r\n\r\nimport {\r\n  DiagnosticCode\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Node,\r\n  NodeKind,\r\n  Expression,\r\n  LiteralKind,\r\n  LiteralExpression,\r\n  StringLiteralExpression\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Type,\r\n  TypeKind,\r\n  TypeFlags\r\n} from \"./types\";\r\n\r\nimport {\r\n  BinaryOp,\r\n  UnaryOp,\r\n  HostOp,\r\n  NativeType,\r\n  ExpressionRef,\r\n  ExpressionId,\r\n  getExpressionId,\r\n  getExpressionType,\r\n  getConstValueI64High,\r\n  getConstValueI64Low,\r\n  getConstValueI32\r\n} from \"./module\";\r\n\r\nimport {\r\n  ElementKind,\r\n  FunctionPrototype,\r\n  Class,\r\n  Field,\r\n  OperatorKind,\r\n  FlowFlags,\r\n  Global,\r\n  DecoratorFlags\r\n} from \"./program\";\r\n\r\nimport {\r\n  ReportMode\r\n} from \"./resolver\";\r\n\r\nimport {\r\n  CommonFlags\r\n} from \"./common\";\r\n\r\n/** Compiles a call to a built-in function. */\r\nexport function compileCall(\r\n  compiler: Compiler,\r\n  prototype: FunctionPrototype,\r\n  typeArguments: Type[] | null,\r\n  operands: Expression[],\r\n  contextualType: Type,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var module = compiler.module;\r\n\r\n  var arg0: ExpressionRef,\r\n      arg1: ExpressionRef,\r\n      arg2: ExpressionRef,\r\n      ret: ExpressionRef;\r\n\r\n  // NOTE that some implementations below make use of the select expression where straight-forward.\r\n  // whether worth or not should probably be tested once it's known if/how embedders handle it.\r\n  // search: createSelect\r\n\r\n  switch (prototype.internalName) {\r\n\r\n    // types\r\n\r\n    case \"isInteger\": { // isInteger<T!>() / isInteger<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      return type.is(TypeFlags.INTEGER) && !type.is(TypeFlags.REFERENCE)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isFloat\": { // isFloat<T!>() / isFloat<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      return type.is(TypeFlags.FLOAT)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isSigned\": { // isSigned<T!>() / isSigned<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      return type.is(TypeFlags.SIGNED)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isReference\": { // isReference<T!>() / isReference<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      compiler.currentType = Type.bool;\r\n      return type.is(TypeFlags.REFERENCE)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isString\": { // isString<T!>() / isString<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      let classType = type.classReference;\r\n      if (classType) {\r\n        let stringInstance = compiler.program.stringInstance;\r\n        if (stringInstance && classType.isAssignableTo(stringInstance)) return module.createI32(1);\r\n      }\r\n      return module.createI32(0);\r\n    }\r\n    case \"isArray\": { // isArray<T!>() / isArray<T?>(value: T) -> bool\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      let classType = type.classReference;\r\n      return classType !== null && classType.lookupOverload(OperatorKind.INDEXED_GET) !== null\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isDefined\": { // isDefined(expression) -> bool\r\n      compiler.currentType = Type.bool;\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let element = compiler.resolver.resolveExpression(operands[0], compiler.currentFunction, ReportMode.SWALLOW);\r\n      return module.createI32(element ? 1 : 0);\r\n    }\r\n    case \"isConstant\": { // isConstant(expression) -> bool\r\n      compiler.currentType = Type.bool;\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let expr = compiler.compileExpressionRetainType(operands[0], Type.i32, WrapMode.NONE);\r\n      compiler.currentType = Type.bool;\r\n      return module.createI32(getExpressionId(expr) == ExpressionId.Const ? 1 : 0);\r\n    }\r\n    case \"isManaged\": { // isManaged<T>() -> bool\r\n      if (!compiler.program.hasGC) {\r\n        compiler.currentType = Type.bool;\r\n        return module.createI32(0);\r\n      }\r\n      let type = evaluateConstantType(compiler, typeArguments, operands, reportNode);\r\n      compiler.currentType = Type.bool;\r\n      if (!type) return module.createUnreachable();\r\n      let classType = type.classReference;\r\n      return classType !== null && !classType.hasDecorator(DecoratorFlags.UNMANAGED)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n\r\n    // math\r\n\r\n    case \"clz\": { // clz<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16: {\r\n          ret = module.createUnary(UnaryOp.ClzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.BOOL: // usually overflows\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createUnary(UnaryOp.ClzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createUnary(\r\n            compiler.options.isWasm64\r\n              ? UnaryOp.ClzI64\r\n              : UnaryOp.ClzI32,\r\n            arg0\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createUnary(UnaryOp.ClzI64, arg0);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"ctz\": { // ctz<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.NONE, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16: {\r\n          ret = module.createUnary(UnaryOp.CtzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.BOOL: // usually overflows\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createUnary(UnaryOp.CtzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createUnary(\r\n            compiler.options.isWasm64\r\n              ? UnaryOp.CtzI64\r\n              : UnaryOp.CtzI32,\r\n            arg0\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createUnary(UnaryOp.CtzI64, arg0);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"popcnt\": { // popcnt<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16: {\r\n          ret = module.createUnary(UnaryOp.PopcntI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.BOOL: // usually overflows\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createUnary(UnaryOp.PopcntI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createUnary(\r\n            compiler.options.isWasm64\r\n              ? UnaryOp.PopcntI64\r\n              : UnaryOp.PopcntI32,\r\n            arg0\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createUnary(UnaryOp.PopcntI64, arg0);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"rotl\": { // rotl<T?>(value: T, shift: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.BOOL: {\r\n          ret = compiler.ensureSmallIntegerWrap(\r\n            module.createBinary(BinaryOp.RotlI32, arg0, arg1),\r\n            compiler.currentType\r\n          );\r\n          // fall-through\r\n        }\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createBinary(BinaryOp.RotlI32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createBinary(\r\n            compiler.options.isWasm64\r\n              ? BinaryOp.RotlI64\r\n              : BinaryOp.RotlI32,\r\n            arg0,\r\n            arg1\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createBinary(BinaryOp.RotlI64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret; // possibly overflows\r\n    }\r\n    case \"rotr\": { // rotr<T?>(value: T, shift: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.BOOL: {\r\n          ret = compiler.ensureSmallIntegerWrap(\r\n            module.createBinary(BinaryOp.RotrI32, arg0, arg1),\r\n            compiler.currentType\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          ret = module.createBinary(BinaryOp.RotrI32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          ret = module.createBinary(\r\n            compiler.options.isWasm64\r\n              ? BinaryOp.RotrI64\r\n              : BinaryOp.RotrI32,\r\n            arg0,\r\n            arg1\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          ret = module.createBinary(BinaryOp.RotrI64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret; // possibly overflowws\r\n    }\r\n    case \"abs\": { // abs<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          // possibly overflows, e.g. abs<i8>(-128) == 128\r\n          let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i32, false);\r\n          ret = module.createSelect( // x > 0 ? x : 0-x\r\n            module.createTeeLocal(tempLocal.index, arg0),\r\n            module.createBinary(BinaryOp.SubI32, // ifFalse\r\n              module.createI32(0),\r\n              module.createGetLocal(tempLocal.index, NativeType.I32)\r\n            ),\r\n            module.createBinary(BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal.index, NativeType.I32),\r\n              module.createI32(0)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          let tempLocal = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal.index, arg0),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.SubI64\r\n                : BinaryOp.SubI32,\r\n              compiler.options.usizeType.toNativeZero(module),\r\n              module.createGetLocal(tempLocal.index, compiler.options.nativeSizeType)\r\n            ),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.GtI64\r\n                : BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal.index, compiler.options.nativeSizeType),\r\n              compiler.options.usizeType.toNativeZero(module)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64: {\r\n          let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal.index, arg0),\r\n            module.createBinary(BinaryOp.SubI64,\r\n              module.createI64(0, 0),\r\n              module.createGetLocal(tempLocal.index, NativeType.I64),\r\n            ),\r\n            module.createBinary(BinaryOp.GtI64,\r\n              module.createGetLocal(tempLocal.index, NativeType.I64),\r\n              module.createI64(0, 0)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.U32:\r\n        case TypeKind.U64:\r\n        case TypeKind.BOOL: {\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.AbsF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.AbsF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n        default: { // void\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"max\": { // max<T?>(left: T, right: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          let flow = compiler.currentFunction.flow;\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg0, compiler.currentType)\r\n          );\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg1, compiler.currentType)\r\n          );\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.U32:\r\n        case TypeKind.BOOL: {\r\n          let flow = compiler.currentFunction.flow;\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg0, compiler.currentType)\r\n          );\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg1, compiler.currentType)\r\n          );\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.GtU32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.GtI64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I64)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.U64: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.GtU64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I64)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.GtI64\r\n                : BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType),\r\n              module.createGetLocal(tempLocal1.index, compiler.options.nativeSizeType)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.GtU64\r\n                : BinaryOp.GtU32,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType),\r\n              module.createGetLocal(tempLocal1.index, compiler.options.nativeSizeType)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createBinary(BinaryOp.MaxF32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createBinary(BinaryOp.MaxF64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: { // void\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"min\": { // min<T?>(left: T, right: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.WRAP);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          let flow = compiler.currentFunction.flow;\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg0, compiler.currentType)\r\n          );\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg1, compiler.currentType)\r\n          );\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.LtI32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.U32:\r\n        case TypeKind.BOOL: {\r\n          let flow = compiler.currentFunction.flow;\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg0, compiler.currentType)\r\n          );\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(\r\n            compiler.currentType,\r\n            !flow.canOverflow(arg1, compiler.currentType)\r\n          );\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.LtU32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.I64: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.LtI64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I64)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.U64: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(BinaryOp.LtU64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n              module.createGetLocal(tempLocal1.index, NativeType.I64)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.LtI64\r\n                : BinaryOp.LtI32,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType),\r\n              module.createGetLocal(tempLocal1.index, compiler.options.nativeSizeType)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          let tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType, false);\r\n          let tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n          compiler.currentFunction.freeTempLocal(tempLocal0);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createTeeLocal(tempLocal1.index, arg1),\r\n            module.createBinary(\r\n              compiler.options.isWasm64\r\n                ? BinaryOp.LtU64\r\n                : BinaryOp.LtU32,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType),\r\n              module.createGetLocal(tempLocal1.index, compiler.options.nativeSizeType)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createBinary(BinaryOp.MinF32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createBinary(BinaryOp.MinF64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: { // void\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"ceil\": { // ceil<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: { // any integer\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.CeilF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.CeilF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"floor\": { // floor<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: { // any integer\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.FloorF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.FloorF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"copysign\": { // copysign<T?>(left: T, right: T) -> T\r\n      if (operands.length != 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"2\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      switch (compiler.currentType.kind) { // TODO: does an integer version make sense?\r\n        case TypeKind.F32: {\r\n          ret = module.createBinary(BinaryOp.CopysignF32, arg0, arg1);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createBinary(BinaryOp.CopysignF64, arg0, arg1);\r\n          break;\r\n        }\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"nearest\": { // nearest<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: { // any integer\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.NearestF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.NearestF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"reinterpret\": { // reinterpret<T!>(value: *) -> T\r\n      if (operands.length != 1) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          if (typeArguments && typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        if (typeArguments && typeArguments.length) compiler.currentType = typeArguments[0];\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      switch (typeArguments[0].kind) {\r\n        case TypeKind.I32:\r\n        case TypeKind.U32: {\r\n          arg0 = compiler.compileExpression(operands[0], Type.f32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          ret = module.createUnary(UnaryOp.ReinterpretF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.I64:\r\n        case TypeKind.U64: {\r\n          arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          ret = module.createUnary(UnaryOp.ReinterpretF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (typeArguments[0].is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            compiler.currentType = typeArguments[0];\r\n            return module.createUnreachable();\r\n          }\r\n          // fall-through\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          arg0 = compiler.compileExpression(\r\n            operands[0],\r\n            compiler.options.isWasm64\r\n              ? Type.f64\r\n              : Type.f32,\r\n            ConversionKind.IMPLICIT,\r\n            WrapMode.NONE\r\n          );\r\n          ret = module.createUnary(\r\n            compiler.options.isWasm64\r\n              ? UnaryOp.ReinterpretF64\r\n              : UnaryOp.ReinterpretF32,\r\n            arg0\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F32: {\r\n          arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          ret = module.createUnary(UnaryOp.ReinterpretI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          arg0 = compiler.compileExpression(operands[0], Type.i64, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n          ret = module.createUnary(UnaryOp.ReinterpretI64, arg0);\r\n          break;\r\n        }\r\n        default: { // small integers and void\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      compiler.currentType = typeArguments[0];\r\n      return ret;\r\n    }\r\n    case \"sqrt\": { // sqrt<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) { // TODO: integer versions (that return f64 or convert)?\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.SqrtF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.SqrtF64, arg0);\r\n          break;\r\n        }\r\n        // case TypeKind.VOID:\r\n        default: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"trunc\": { // trunc<T?>(value: T) -> T\r\n      if (operands.length != 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments && typeArguments.length) {\r\n        compiler.currentType = typeArguments[0];\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE, WrapMode.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.is(TypeFlags.REFERENCE)) {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = module.createUnreachable();\r\n            break;\r\n          }\r\n          // fall-through\r\n        }\r\n        default: { // any integer\r\n          ret = arg0;\r\n          break;\r\n        }\r\n        // TODO: truncate to contextual type directly (if not void etc.)?\r\n        case TypeKind.F32: {\r\n          ret = module.createUnary(UnaryOp.TruncF32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          ret = module.createUnary(UnaryOp.TruncF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n\r\n    // memory access\r\n\r\n    case \"load\": { // load<T!>(offset: usize, constantOffset?: usize) -> *\r\n      if (operands.length < 1 || operands.length > 2) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        if (operands.length < 1) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n            reportNode.range, \"1\", operands.length.toString(10)\r\n          );\r\n        } else {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_arguments_but_got_1,\r\n            reportNode.range, \"2\", operands.length.toString(10)\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        if (typeArguments && typeArguments.length) compiler.currentType = typeArguments[0];\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      let offset = operands.length == 2 ? evaluateConstantOffset(compiler, operands[1]) : 0; // reports\r\n      if (offset < 0) { // reported in evaluateConstantOffset\r\n        return module.createUnreachable();\r\n      }\r\n      compiler.currentType = typeArguments[0];\r\n      return module.createLoad(\r\n        typeArguments[0].byteSize,\r\n        typeArguments[0].is(TypeFlags.SIGNED | TypeFlags.INTEGER),\r\n        arg0,\r\n        typeArguments[0].is(TypeFlags.INTEGER) &&\r\n        contextualType.is(TypeFlags.INTEGER) &&\r\n        contextualType.size > typeArguments[0].size\r\n          ? (compiler.currentType = contextualType).toNativeType()\r\n          : (compiler.currentType = typeArguments[0]).toNativeType(),\r\n        offset\r\n      );\r\n    }\r\n    case \"store\": { // store<T!>(offset: usize, value: *, constantOffset?: usize) -> void\r\n      compiler.currentType = Type.void;\r\n      if (operands.length < 2 || operands.length > 3) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        if (operands.length < 2) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n            reportNode.range, \"2\", operands.length.toString(10)\r\n          );\r\n        } else {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_arguments_but_got_1,\r\n            reportNode.range, \"3\", operands.length.toString(10)\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg1 = compiler.compileExpression(\r\n        operands[1],\r\n        typeArguments[0],\r\n        typeArguments[0].is(TypeFlags.INTEGER)\r\n          ? ConversionKind.NONE // no need to convert to small int (but now might result in a float)\r\n          : ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      let type: Type;\r\n      if (\r\n        typeArguments[0].is(TypeFlags.INTEGER) &&\r\n        (\r\n          !compiler.currentType.is(TypeFlags.INTEGER) ||    // float to int\r\n          compiler.currentType.size < typeArguments[0].size // int to larger int (clear garbage bits)\r\n        )\r\n      ) {\r\n        arg1 = compiler.convertExpression(\r\n          arg1,\r\n          compiler.currentType, typeArguments[0],\r\n          ConversionKind.IMPLICIT,\r\n          WrapMode.NONE, // still clears garbage bits\r\n          operands[1]\r\n        );\r\n        type = typeArguments[0];\r\n      } else {\r\n        type = compiler.currentType;\r\n      }\r\n      let offset = operands.length == 3 ? evaluateConstantOffset(compiler, operands[2]) : 0; // reports\r\n      if (offset < 0) { // reported in evaluateConstantOffset\r\n        return module.createUnreachable();\r\n      }\r\n      compiler.currentType = Type.void;\r\n      return module.createStore(typeArguments[0].byteSize, arg0, arg1, type.toNativeType(), offset);\r\n    }\r\n    case \"sizeof\": { // sizeof<T!>() -> usize\r\n      compiler.currentType = compiler.options.usizeType;\r\n      if (operands.length != 0) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n      }\r\n      let byteSize = (<Type[]>typeArguments)[0].byteSize;\r\n      if (compiler.options.isWasm64) {\r\n        // implicitly wrap if contextual type is a 32-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size <= 32) {\r\n          compiler.currentType = Type.u32;\r\n          ret = module.createI32(byteSize);\r\n        } else {\r\n          ret = module.createI64(byteSize, 0);\r\n        }\r\n      } else {\r\n        // implicitly extend if contextual type is a 64-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size == 64) {\r\n          compiler.currentType = Type.u64;\r\n          ret = module.createI64(byteSize, 0);\r\n        } else {\r\n          ret = module.createI32(byteSize);\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"alignof\": { // alignof<T!>() -> usize\r\n      compiler.currentType = compiler.options.usizeType;\r\n      if (operands.length != 0) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let byteSize = (<Type[]>typeArguments)[0].byteSize;\r\n      let alignLog2: i32;\r\n      switch (byteSize) {\r\n        case 1: { alignLog2 = 0; break; }\r\n        case 2: { alignLog2 = 1; break; }\r\n        case 4: { alignLog2 = 2; break; }\r\n        case 8: { alignLog2 = 3; break; }\r\n        default: { assert(false); return module.createUnreachable(); }\r\n      }\r\n      if (compiler.options.isWasm64) {\r\n        // implicitly wrap if contextual type is a 32-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size <= 32) {\r\n          compiler.currentType = Type.u32;\r\n          ret = module.createI32(alignLog2);\r\n        } else {\r\n          ret = module.createI64(alignLog2, 0);\r\n        }\r\n      } else {\r\n        // implicitly extend if contextual type is a 64-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size == 64) {\r\n          compiler.currentType = Type.u64;\r\n          ret = module.createI64(alignLog2, 0);\r\n        } else {\r\n          ret = module.createI32(alignLog2);\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"offsetof\": { // offsetof<T!>(fieldName?: string) -> usize\r\n      compiler.currentType = compiler.options.usizeType;\r\n      if (operands.length > 1) {\r\n        if (!(typeArguments && typeArguments.length == 1)) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n          );\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let classType = typeArguments[0].classReference;\r\n      if (!classType) {\r\n        compiler.error( // TODO: better error\r\n          DiagnosticCode.Operation_not_supported,\r\n          reportNode.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let offset: i32;\r\n      if (operands.length) {\r\n        if (\r\n          operands[0].kind != NodeKind.LITERAL ||\r\n          (<LiteralExpression>operands[0]).literalKind != LiteralKind.STRING\r\n        ) {\r\n          compiler.error(\r\n            DiagnosticCode.String_literal_expected,\r\n            operands[0].range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        let fieldName = (<StringLiteralExpression>operands[0]).value;\r\n        let field = classType.members ? classType.members.get(fieldName) : null;\r\n        if (!(field && field.kind == ElementKind.FIELD)) {\r\n          compiler.error(\r\n            DiagnosticCode.Type_0_has_no_property_1,\r\n            operands[0].range, classType.internalName, fieldName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        offset = (<Field>field).memoryOffset;\r\n      } else {\r\n        offset = classType.currentMemoryOffset;\r\n      }\r\n      if (compiler.options.isWasm64) {\r\n        // implicitly wrap if contextual type is a 32-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size <= 32) {\r\n          compiler.currentType = Type.u32;\r\n          return module.createI32(offset);\r\n        } else {\r\n          return module.createI64(offset);\r\n        }\r\n      } else {\r\n        // implicitly extend if contextual type is a 64-bit integer\r\n        if (contextualType.is(TypeFlags.INTEGER) && contextualType.size == 64) {\r\n          compiler.currentType = Type.u64;\r\n          return module.createI64(offset);\r\n        } else {\r\n          return module.createI32(offset);\r\n        }\r\n      }\r\n    }\r\n\r\n    // control flow\r\n\r\n    case \"select\": { // select<T?>(ifTrue: T, ifFalse: T, condition: bool) -> T\r\n      if (operands.length != 3) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"3\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        arg0 = compiler.compileExpressionRetainType(operands[0], Type.i32, WrapMode.NONE);\r\n      }\r\n      let type = compiler.currentType;\r\n      arg1 = compiler.compileExpression(operands[1], type, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      arg2 = compiler.makeIsTrueish(\r\n        compiler.compileExpressionRetainType(operands[2], Type.bool, WrapMode.NONE),\r\n        compiler.currentType\r\n      );\r\n      compiler.currentType = type;\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.U8:\r\n        case TypeKind.U16:\r\n        case TypeKind.BOOL: {\r\n          ret = module.createSelect(arg0, arg1, arg2);\r\n          break;\r\n        }\r\n        default: { // any other value type\r\n          ret = module.createSelect(arg0, arg1, arg2);\r\n          break;\r\n        }\r\n        case TypeKind.VOID: {\r\n          compiler.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          ret = module.createUnreachable();\r\n          break;\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"unreachable\": { // unreachable() -> *\r\n      if (operands.length != 0) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n      }\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      return module.createUnreachable();\r\n    }\r\n\r\n    // host operations\r\n\r\n    case \"memory.size\": { // memory.size() -> i32\r\n      compiler.currentType = Type.i32;\r\n      if (operands.length != 0) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n      }\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      return module.createHost(HostOp.CurrentMemory);\r\n    }\r\n    case \"memory.grow\": { // memory.grow(pages: i32) -> i32\r\n      compiler.currentType = Type.i32;\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"0\", operands.length.toString(10)\r\n        );\r\n        arg0 = module.createUnreachable();\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      }\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      return module.createHost(HostOp.GrowMemory, null, [ arg0 ]);\r\n    }\r\n    // see: https://github.com/WebAssembly/bulk-memory-operations\r\n    case \"memory.copy\": { // memory.copy(dest: usize, src: usize: n: usize) -> void\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 3) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"3\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.void;\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg1 = compiler.compileExpression(\r\n        operands[1],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg2 = compiler.compileExpression(\r\n        operands[2],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      compiler.currentType = Type.void;\r\n      throw new Error(\"not implemented\");\r\n      // return module.createHost(HostOp.MoveMemory, null, [ arg0, arg1, arg2 ]);\r\n    }\r\n    case \"memory.fill\": { // memory.fill(dest: usize, value: u8, n: usize) -> void\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 3) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"3\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.void;\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg1 = compiler.compileExpression(\r\n        operands[1],\r\n        Type.u32,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      arg2 = compiler.compileExpression(\r\n        operands[2],\r\n        compiler.options.usizeType,\r\n        ConversionKind.IMPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n      compiler.currentType = Type.void;\r\n      throw new Error(\"not implemented\");\r\n      // return module.createHost(HostOp.SetMemory, null, [ arg0, arg1, arg2 ]);\r\n    }\r\n\r\n    // other\r\n\r\n    case \"changetype\": { // changetype<T!>(value: *) -> T\r\n      if (!(typeArguments && typeArguments.length == 1)) {\r\n        if (typeArguments && typeArguments.length) compiler.currentType = typeArguments[0];\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = typeArguments[0];\r\n        return module.createUnreachable();\r\n      }\r\n      arg0 = compiler.compileExpressionRetainType(\r\n        operands[0],\r\n        typeArguments[0],\r\n        WrapMode.NONE\r\n      );\r\n      compiler.currentType = typeArguments[0];\r\n      if (compiler.currentType.size != typeArguments[0].size) {\r\n        compiler.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          reportNode.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      // if (reportNode.range.source.sourceKind != SourceKind.STDLIB)\r\n      //  compiler.warning(DiagnosticCode.Operation_is_unsafe, reportNode.range);\r\n      return arg0; // any usize to any usize\r\n    }\r\n    case \"assert\": { // assert<T?>(isTrueish: T, message?: string) -> T with T != null\r\n      if (operands.length < 1 || operands.length > 2) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0].nonNullableType;\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        if (operands.length < 1) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n            reportNode.range, \"1\", operands.length.toString(10)\r\n          );\r\n        } else if (operands.length > 2) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_arguments_but_got_1,\r\n            reportNode.range, \"2\", operands.length.toString(10)\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\r\n        if (typeArguments.length) compiler.currentType = typeArguments[0].nonNullableType;\r\n        if (typeArguments.length != 1) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        arg0 = compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.WRAP);\r\n      } else {\r\n        arg0 = compiler.compileExpressionRetainType(operands[0], Type.bool, WrapMode.WRAP);\r\n      }\r\n\r\n      let type = compiler.currentType;\r\n      compiler.currentType = type.nonNullableType;\r\n\r\n      // just return ifTrueish if assertions are disabled, or simplify if dropped anyway\r\n      if (compiler.options.noAssert) {\r\n        if (contextualType == Type.void) {\r\n          compiler.currentType = Type.void;\r\n          return module.createNop();\r\n        }\r\n        return arg0;\r\n      }\r\n\r\n      let abort = compileAbort(compiler, operands.length == 2 ? operands[1] : null, reportNode);\r\n\r\n      compiler.currentType = type.nonNullableType;\r\n\r\n      if (contextualType == Type.void) { // simplify if dropped anyway\r\n        switch (compiler.currentType.kind) {\r\n          default: { // any integer up to 32-bits incl. bool\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI32,\r\n                arg0\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI64,\r\n                arg0\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE:\r\n          case TypeKind.USIZE: {\r\n            ret = module.createIf(\r\n              module.createUnary(\r\n                compiler.options.isWasm64\r\n                  ? UnaryOp.EqzI64\r\n                  : UnaryOp.EqzI32,\r\n                arg0\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          // TODO: also check for NaN in float assertions, as in `Boolean(NaN) -> false`?\r\n          case TypeKind.F32: {\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF32,\r\n                arg0,\r\n                module.createF32(0)\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF64,\r\n                arg0,\r\n                module.createF64(0)\r\n              ),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.VOID: {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = abort;\r\n            break;\r\n          }\r\n        }\r\n        compiler.currentType = Type.void;\r\n      } else {\r\n        switch (compiler.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16:\r\n          case TypeKind.U8:\r\n          case TypeKind.U16:\r\n          case TypeKind.BOOL: {\r\n            let flow = compiler.currentFunction.flow;\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(\r\n              compiler.currentType,\r\n              !flow.canOverflow(arg0, compiler.currentType)\r\n            );\r\n            ret = module.createIf(\r\n              module.createTeeLocal(tempLocal.index, arg0),\r\n              module.createGetLocal(tempLocal.index, NativeType.I32),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I32:\r\n          case TypeKind.U32:\r\n          default: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i32, false);\r\n            ret = module.createIf(\r\n              module.createTeeLocal(tempLocal.index, arg0),\r\n              module.createGetLocal(tempLocal.index, NativeType.I32),\r\n              abort\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.i64, false);\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI64,\r\n                module.createTeeLocal(tempLocal.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal.index, NativeType.I64)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE:\r\n          case TypeKind.USIZE: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType, false);\r\n            ret = module.createIf(\r\n              module.createUnary(\r\n                compiler.options.isWasm64\r\n                  ? UnaryOp.EqzI64\r\n                  : UnaryOp.EqzI32,\r\n                module.createTeeLocal(tempLocal.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal.index, compiler.options.nativeSizeType)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.f32, false);\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF32,\r\n                module.createTeeLocal(tempLocal.index, arg0),\r\n                module.createF32(0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal.index, NativeType.F32)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            let tempLocal = compiler.currentFunction.getAndFreeTempLocal(Type.f64, false);\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF64,\r\n                module.createTeeLocal(tempLocal.index, arg0),\r\n                module.createF64(0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal.index, NativeType.F64)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.VOID: {\r\n            compiler.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              reportNode.range\r\n            );\r\n            ret = abort;\r\n            break;\r\n          }\r\n        }\r\n      }\r\n      return ret;\r\n    }\r\n    case \"unchecked\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let flow = compiler.currentFunction.flow;\r\n      flow.set(FlowFlags.UNCHECKED_CONTEXT);\r\n      ret = compiler.compileExpressionRetainType(operands[0], contextualType, WrapMode.NONE);\r\n      flow.unset(FlowFlags.UNCHECKED_CONTEXT);\r\n      return ret;\r\n    }\r\n    case \"call_indirect\": { // call_indirect<T?>(target: Function | u32, ...args: *[]) -> T\r\n      if (operands.length < 1) {\r\n        if (typeArguments) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          if (typeArguments.length != 1) {\r\n            compiler.error(\r\n              DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n              reportNode.range, \"1\", typeArguments.length.toString(10)\r\n            );\r\n          }\r\n        }\r\n        compiler.error(\r\n          DiagnosticCode.Expected_at_least_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let returnType: Type;\r\n      if (typeArguments) {\r\n        if (typeArguments.length != 1) {\r\n          if (typeArguments.length) compiler.currentType = typeArguments[0];\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        returnType = typeArguments[0];\r\n      } else {\r\n        returnType = contextualType;\r\n      }\r\n      arg0 = compiler.compileExpressionRetainType(operands[0], Type.u32, WrapMode.NONE);\r\n      if (compiler.currentType.kind != TypeKind.U32) {\r\n        compiler.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          operands[0].range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      let numOperands = operands.length - 1;\r\n      let operandExprs = new Array<ExpressionRef>(numOperands);\r\n      let signatureParts = new Array<string>(numOperands + 1);\r\n      let nativeReturnType = returnType.toNativeType();\r\n      let nativeParamTypes = new Array<NativeType>(numOperands);\r\n      for (let i = 0; i < numOperands; ++i) {\r\n        operandExprs[i] = compiler.compileExpressionRetainType(operands[1 + i], Type.i32, WrapMode.NONE);\r\n        let operandType = compiler.currentType;\r\n        signatureParts[i] = operandType.toSignatureString();\r\n        nativeParamTypes[i] = operandType.toNativeType();\r\n      }\r\n      signatureParts[numOperands] = returnType.toSignatureString();\r\n      let typeName = signatureParts.join(\"\");\r\n      let typeRef = module.getFunctionTypeBySignature(nativeReturnType, nativeParamTypes);\r\n      if (!typeRef) typeRef = module.addFunctionType(typeName, nativeReturnType, nativeParamTypes);\r\n      compiler.currentType = returnType;\r\n      // of course this can easily result in a 'RuntimeError: function signature mismatch' trap and\r\n      // thus must be used with care. it exists because it *might* be useful in specific scenarios.\r\n      return module.createCallIndirect(arg0, operandExprs, typeName);\r\n    }\r\n\r\n    // user-defined diagnostic macros\r\n\r\n    case \"ERROR\": {\r\n      compiler.error(\r\n        DiagnosticCode.User_defined_0,\r\n        reportNode.range, (operands.length ? operands[0] : reportNode).range.toString()\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    case \"WARNING\": {\r\n      compiler.warning(\r\n        DiagnosticCode.User_defined_0,\r\n        reportNode.range, (operands.length ? operands[0] : reportNode).range.toString()\r\n      );\r\n      return module.createNop();\r\n    }\r\n    case \"INFO\": {\r\n      compiler.info(\r\n        DiagnosticCode.User_defined_0,\r\n        reportNode.range, (operands.length ? operands[0] : reportNode).range.toString()\r\n      );\r\n      return module.createNop();\r\n    }\r\n\r\n    // conversions\r\n\r\n    case \"i8\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.i8;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.i8,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"i16\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.i16;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.i16,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"i32\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.i32;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.i32,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"i64\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.i64;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.i64,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"isize\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = compiler.options.isWasm64\r\n          ? Type.isize64\r\n          : Type.isize32;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.isWasm64\r\n          ? Type.isize64\r\n          : Type.isize32,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"u8\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.u8;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.u8,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"u16\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.u16;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.u16,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"u32\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.u32;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.u32,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"u64\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.u64;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.u64,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"usize\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = compiler.options.usizeType;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"bool\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.bool;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.bool,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"f32\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.f32;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.f32,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n    case \"f64\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.f64;\r\n        return module.createUnreachable();\r\n      }\r\n      return compiler.compileExpression(\r\n        operands[0],\r\n        Type.f64,\r\n        ConversionKind.EXPLICIT,\r\n        WrapMode.NONE\r\n      );\r\n    }\r\n\r\n    // gc\r\n\r\n    case \"iterateRoots\": {\r\n      if (typeArguments) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_generic,\r\n          reportNode.range, prototype.internalName\r\n        );\r\n      }\r\n      if (operands.length != 1) {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_arguments_but_got_1,\r\n          reportNode.range, \"1\", operands.length.toString(10)\r\n        );\r\n        compiler.currentType = Type.void;\r\n        return module.createUnreachable();\r\n      }\r\n      let expr = compiler.compileExpressionRetainType(operands[0], Type.u32, WrapMode.NONE);\r\n      let type = compiler.currentType;\r\n      let signatureReference = type.signatureReference;\r\n      compiler.currentType = Type.void;\r\n      if (\r\n        !type.is(TypeFlags.REFERENCE) ||\r\n        !signatureReference ||\r\n        signatureReference.parameterTypes.length != 1 ||\r\n        signatureReference.parameterTypes[0] != compiler.options.usizeType\r\n       ) {\r\n        compiler.error(\r\n          DiagnosticCode.Type_0_is_not_assignable_to_type_1,\r\n          reportNode.range, type.toString(), \"(ref: usize) => void\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      compiler.currentType = Type.void;\r\n      // just emit a call even if the function doesn't yet exist\r\n      compiler.needsIterateRoots = true;\r\n      return module.createCall(\"~iterateRoots\", [ expr ], NativeType.None);\r\n    }\r\n  }\r\n  var expr = deferASMCall(compiler, prototype, operands, contextualType, reportNode);\r\n  if (expr) {\r\n    if (typeArguments && typeArguments.length) {\r\n      compiler.error(\r\n        DiagnosticCode.Type_0_is_not_generic,\r\n        reportNode.range, prototype.internalName\r\n      );\r\n    }\r\n    return expr;\r\n  }\r\n  compiler.error(\r\n    DiagnosticCode.Operation_not_supported,\r\n    reportNode.range\r\n  );\r\n  return module.createUnreachable();\r\n}\r\n\r\n/** Defers an inline-assembler-like call to a built-in function. */\r\nfunction deferASMCall(\r\n  compiler: Compiler,\r\n  prototype: FunctionPrototype,\r\n  operands: Expression[],\r\n  contextualType: Type,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  switch (prototype.internalName) {\r\n\r\n    // TODO: Operators can't be just deferred (don't have a corresponding generic built-in)\r\n    //   add, sub, mul, div_s, div_u, rem_s, rem_u\r\n    //   and, or, xor, shl, shr_u, shr_s\r\n    //   eq, eqz, ne, lt_s, lt_u, le_s, le_u, gt_s, gt_u, ge_s, ge_u\r\n\r\n    case \"i32.clz\": return deferASM(\"clz\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.clz\": return deferASM(\"clz\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"i32.ctz\": return deferASM(\"ctz\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.ctz\": return deferASM(\"ctz\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"i32.popcnt\": return deferASM(\"popcnt\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.popcnt\": return deferASM(\"popcnt\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"i32.rotl\": return deferASM(\"rotl\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.rotl\": return deferASM(\"rotl\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"i32.rotr\": return deferASM(\"rotr\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.rotr\": return deferASM(\"rotr\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n\r\n    case \"f32.abs\": return deferASM(\"abs\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.abs\": return deferASM(\"abs\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.max\": return deferASM(\"max\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.max\": return deferASM(\"max\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.min\": return deferASM(\"min\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.min\": return deferASM(\"min\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.ceil\": return deferASM(\"ceil\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.ceil\": return deferASM(\"ceil\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.floor\": return deferASM(\"floor\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.floor\": return deferASM(\"floor\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.copysign\": return deferASM(\"copysign\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.copysign\": return deferASM(\"copysign\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.nearest\": return deferASM(\"nearest\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.nearest\": return deferASM(\"nearest\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"i32.reinterpret_f32\": return deferASM(\"reinterpret\", compiler, Type.i32, operands, Type.f32, reportNode);\r\n    case \"i64.reinterpret_f64\": return deferASM(\"reinterpret\", compiler, Type.i64, operands, Type.f64, reportNode);\r\n    case \"f32.reinterpret_i32\": return deferASM(\"reinterpret\", compiler, Type.f32, operands, Type.i32, reportNode);\r\n    case \"f64.reinterpret_i64\": return deferASM(\"reinterpret\", compiler, Type.f64, operands, Type.i64, reportNode);\r\n\r\n    case \"f32.sqrt\": return deferASM(\"sqrt\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.sqrt\": return deferASM(\"sqrt\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"f32.trunc\": return deferASM(\"trunc\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.trunc\": return deferASM(\"trunc\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"i32.load8_s\": return deferASM(\"load\", compiler, Type.i8, operands, Type.i32, reportNode);\r\n    case \"i32.load8_u\": return deferASM(\"load\", compiler, Type.u8, operands, Type.u32, reportNode);\r\n    case \"i32.load16_s\": return deferASM(\"load\", compiler, Type.i16, operands, Type.i32, reportNode);\r\n    case \"i32.load16_u\": return deferASM(\"load\", compiler, Type.u16, operands, Type.u32, reportNode);\r\n    case \"i32.load\": return deferASM(\"load\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.load8_s\": return deferASM(\"load\", compiler, Type.i8, operands, Type.i64, reportNode);\r\n    case \"i64.load8_u\": return deferASM(\"load\", compiler, Type.u8, operands, Type.u64, reportNode);\r\n    case \"i64.load16_s\": return deferASM(\"load\", compiler, Type.i16, operands, Type.i64, reportNode);\r\n    case \"i64.load16_u\": return deferASM(\"load\", compiler, Type.u16, operands, Type.u64, reportNode);\r\n    case \"i64.load32_s\": return deferASM(\"load\", compiler, Type.i32, operands, Type.i64, reportNode);\r\n    case \"i64.load32_u\": return deferASM(\"load\", compiler, Type.u32, operands, Type.u64, reportNode);\r\n    case \"i64.load\": return deferASM(\"load\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n    case \"f32.load\": return deferASM(\"load\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.load\": return deferASM(\"load\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n\r\n    case \"i32.store8\": return deferASM(\"store\", compiler, Type.i8, operands, Type.i32, reportNode);\r\n    case \"i32.store16\": return deferASM(\"store\", compiler, Type.i16, operands, Type.i32, reportNode);\r\n    case \"i32.store\": return deferASM(\"store\", compiler, Type.i32, operands, Type.i32, reportNode);\r\n    case \"i64.store8\": return deferASM(\"store\", compiler, Type.i8, operands, Type.i64, reportNode);\r\n    case \"i64.store16\": return deferASM(\"store\", compiler, Type.i16, operands, Type.i64, reportNode);\r\n    case \"i64.store32\": return deferASM(\"store\", compiler, Type.i32, operands, Type.i64, reportNode);\r\n    case \"i64.store\": return deferASM(\"store\", compiler, Type.i64, operands, Type.i64, reportNode);\r\n    case \"f32.store\": return deferASM(\"store\", compiler, Type.f32, operands, Type.f32, reportNode);\r\n    case \"f64.store\": return deferASM(\"store\", compiler, Type.f64, operands, Type.f64, reportNode);\r\n  }\r\n  return 0;\r\n}\r\n\r\n/** A helper for deferring inline-assembler-like calls to built-in functions. */\r\nfunction deferASM(\r\n  name: string,\r\n  compiler: Compiler,\r\n  typeArgument: Type,\r\n  operands: Expression[],\r\n  valueType: Type,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var prototype = assert(compiler.program.elementsLookup.get(name));\r\n  assert(prototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n  return compileCall(compiler, <FunctionPrototype>prototype, [ typeArgument ], operands, valueType, reportNode);\r\n}\r\n\r\n/** Evaluates the constant type of a type argument *or* expression. */\r\nfunction evaluateConstantType(\r\n  compiler: Compiler,\r\n  typeArguments: Type[] | null,\r\n  operands: Expression[],\r\n  reportNode: Node\r\n): Type | null {\r\n  if (operands.length == 0) { // requires type argument\r\n    if (!typeArguments || typeArguments.length != 1) {\r\n      compiler.error(\r\n        DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n        reportNode.range, \"1\", typeArguments ? typeArguments.length.toString(10) : \"0\"\r\n      );\r\n      return null;\r\n    }\r\n    return typeArguments[0];\r\n  }\r\n  if (operands.length == 1) { // optional type argument\r\n    if (typeArguments) {\r\n      if (typeArguments.length == 1) {\r\n        compiler.compileExpression(operands[0], typeArguments[0], ConversionKind.IMPLICIT, WrapMode.NONE);\r\n      } else {\r\n        if (typeArguments.length) {\r\n          compiler.error(\r\n            DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n            reportNode.range, \"1\", typeArguments.length.toString(10)\r\n          );\r\n          return null;\r\n        }\r\n        compiler.compileExpressionRetainType(operands[0], Type.i32, WrapMode.NONE);\r\n      }\r\n    } else {\r\n      compiler.compileExpressionRetainType(operands[0], Type.i32, WrapMode.NONE);\r\n    }\r\n    return compiler.currentType;\r\n  }\r\n  if (typeArguments && typeArguments.length > 1) {\r\n    compiler.error(\r\n      DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n      reportNode.range, \"1\", typeArguments.length.toString(10)\r\n    );\r\n  }\r\n  compiler.error(\r\n    DiagnosticCode.Expected_0_arguments_but_got_1,\r\n    reportNode.range, \"1\", operands.length.toString(10)\r\n  );\r\n  return null;\r\n}\r\n\r\n/** Evaluates a `constantOffset` argument.*/\r\nfunction evaluateConstantOffset(compiler: Compiler, expression: Expression): i32 {\r\n  var expr: ExpressionRef;\r\n  var value: i32;\r\n  if (compiler.options.isWasm64) {\r\n    expr = compiler.precomputeExpression(expression, Type.usize64, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n    if (\r\n      getExpressionId(expr) != ExpressionId.Const ||\r\n      getExpressionType(expr) != NativeType.I64 ||\r\n      getConstValueI64High(expr) != 0 ||\r\n      (value = getConstValueI64Low(expr)) < 0\r\n    ) {\r\n      compiler.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        expression.range\r\n      );\r\n      value = -1;\r\n    }\r\n  } else {\r\n    expr = compiler.precomputeExpression(expression, Type.usize32, ConversionKind.IMPLICIT, WrapMode.NONE);\r\n    if (\r\n      getExpressionId(expr) != ExpressionId.Const ||\r\n      getExpressionType(expr) != NativeType.I32 ||\r\n      (value = getConstValueI32(expr)) < 0\r\n    ) {\r\n      compiler.error(\r\n        DiagnosticCode.Operation_not_supported,\r\n        expression.range\r\n      );\r\n      value = -1;\r\n    }\r\n  }\r\n  return value;\r\n}\r\n\r\n/** Compiles a memory allocation for an instance of the specified class. */\r\nexport function compileAllocate(\r\n  compiler: Compiler,\r\n  classInstance: Class,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var program = compiler.program;\r\n  assert(classInstance.program == program);\r\n  var module = compiler.module;\r\n  var options = compiler.options;\r\n\r\n  // __gc_allocate(size, markFn)\r\n  if (program.hasGC && classInstance.type.isManaged(program)) {\r\n    let allocateInstance = assert(program.gcAllocateInstance);\r\n    if (!compiler.compileFunction(allocateInstance)) return module.createUnreachable();\r\n    compiler.currentType = classInstance.type;\r\n    return module.createCall(\r\n      allocateInstance.internalName, [\r\n        options.isWasm64\r\n          ? module.createI64(classInstance.currentMemoryOffset)\r\n          : module.createI32(classInstance.currentMemoryOffset),\r\n        module.createI32(\r\n          ensureGCHook(compiler, classInstance)\r\n        )\r\n      ],\r\n      options.nativeSizeType\r\n    );\r\n\r\n  // memory.allocate(size)\r\n  } else {\r\n    let allocateInstance = program.memoryAllocateInstance;\r\n    if (!allocateInstance) {\r\n      program.error(\r\n        DiagnosticCode.Cannot_find_name_0,\r\n        reportNode.range, \"memory.allocate\"\r\n      );\r\n      return module.createUnreachable();\r\n    }\r\n    if (!compiler.compileFunction(allocateInstance)) return module.createUnreachable();\r\n\r\n    compiler.currentType = classInstance.type;\r\n    return module.createCall(\r\n      allocateInstance.internalName, [\r\n        options.isWasm64\r\n          ? module.createI64(classInstance.currentMemoryOffset)\r\n          : module.createI32(classInstance.currentMemoryOffset)\r\n      ],\r\n      options.nativeSizeType\r\n    );\r\n  }\r\n}\r\n\r\n/** Compiles an abort wired to the conditionally imported 'abort' function. */\r\nexport function compileAbort(\r\n  compiler: Compiler,\r\n  message: Expression | null,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var program = compiler.program;\r\n  var module = compiler.module;\r\n\r\n  var stringType = program.typesLookup.get(\"string\");\r\n  if (!stringType) return module.createUnreachable();\r\n\r\n  var abortInstance = program.abortInstance;\r\n  if (!(abortInstance && compiler.compileFunction(abortInstance))) return module.createUnreachable();\r\n\r\n  var messageArg = message != null\r\n    ? compiler.compileExpression(message, stringType, ConversionKind.IMPLICIT, WrapMode.NONE)\r\n    : stringType.toNativeZero(module);\r\n\r\n  var filenameArg = compiler.ensureStaticString(reportNode.range.source.normalizedPath);\r\n\r\n  compiler.currentType = Type.void;\r\n  return module.createBlock(null, [\r\n    module.createCallImport(\r\n      abortInstance.internalName, [\r\n        messageArg,\r\n        filenameArg,\r\n        module.createI32(reportNode.range.line),\r\n        module.createI32(reportNode.range.column)\r\n      ],\r\n      NativeType.None\r\n    ),\r\n    module.createUnreachable()\r\n  ]);\r\n}\r\n\r\n/** Compiles the iterateRoots function if requires. */\r\nexport function compileIterateRoots(compiler: Compiler): void {\r\n  var module = compiler.module;\r\n  var exprs = new Array<ExpressionRef>();\r\n\r\n  for (let element of compiler.program.elementsLookup.values()) {\r\n    if (element.kind != ElementKind.GLOBAL) continue;\r\n    let global = <Global>element;\r\n    let classReference = global.type.classReference;\r\n    if (\r\n      global.is(CommonFlags.COMPILED) &&\r\n      classReference !== null &&\r\n      !classReference.hasDecorator(DecoratorFlags.UNMANAGED)\r\n    ) {\r\n      if (global.is(CommonFlags.INLINED)) {\r\n        let value = global.constantIntegerValue;\r\n        exprs.push(\r\n          module.createCallIndirect(\r\n            module.createGetLocal(0, NativeType.I32),\r\n            [\r\n              compiler.options.isWasm64\r\n                ? module.createI64(i64_low(value), i64_high(value))\r\n                : module.createI32(i64_low(value))\r\n            ],\r\n            \"iv\"\r\n          )\r\n        );\r\n      } else {\r\n        exprs.push(\r\n          module.createCallIndirect(\r\n            module.createGetLocal(0, NativeType.I32),\r\n            [\r\n              module.createGetGlobal(\r\n                global.internalName,\r\n                compiler.options.nativeSizeType\r\n              )\r\n            ],\r\n            \"iv\"\r\n          )\r\n        );\r\n      }\r\n    }\r\n  }\r\n  var typeRef = compiler.ensureFunctionType([ Type.i32 ], Type.void);\r\n  module.addFunction(\"~iterateRoots\", typeRef, [],\r\n    exprs.length\r\n      ? module.createBlock(null, exprs)\r\n      : module.createNop()\r\n  );\r\n}\r\n\r\n/** Ensures that the specified class's GC hook exists and returns its function table index. */\r\nexport function ensureGCHook(\r\n  compiler: Compiler,\r\n  classInstance: Class\r\n): u32 {\r\n  var program = compiler.program;\r\n  assert(classInstance.type.isManaged(program));\r\n\r\n  // check if the GC hook has already been created\r\n  {\r\n    let existingIndex = classInstance.gcHookIndex;\r\n    if (existingIndex != <u32>-1) return existingIndex;\r\n  }\r\n\r\n  // check if the class implements a custom GC function (only valid for internals)\r\n  var members = classInstance.members;\r\n  if (classInstance.prototype.declaration.range.source.isLibrary) {\r\n    if (members !== null && members.has(\"__gc\")) {\r\n      let gcPrototype = assert(members.get(\"__gc\"));\r\n      assert(gcPrototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n      let gcInstance = assert(program.resolver.resolveFunction(<FunctionPrototype>gcPrototype, null));\r\n      assert(gcInstance.is(CommonFlags.PRIVATE | CommonFlags.INSTANCE));\r\n      assert(!gcInstance.isAny(CommonFlags.AMBIENT | CommonFlags.VIRTUAL));\r\n      assert(gcInstance.signature.parameterTypes.length == 0);\r\n      assert(gcInstance.signature.returnType == Type.void);\r\n      gcInstance.internalName = classInstance.internalName + \"~gc\";\r\n      assert(compiler.compileFunction(gcInstance));\r\n      let index = compiler.ensureFunctionTableEntry(gcInstance);\r\n      classInstance.gcHookIndex = index;\r\n      return index;\r\n    }\r\n  }\r\n\r\n  var module = compiler.module;\r\n  var options = compiler.options;\r\n  var nativeSizeType = options.nativeSizeType;\r\n  var nativeSizeSize = options.usizeType.byteSize;\r\n  var body = new Array<ExpressionRef>();\r\n\r\n  // nothing to mark if 'this' is null\r\n  body.push(\r\n    module.createIf(\r\n      module.createUnary(\r\n        options.isWasm64\r\n          ? UnaryOp.EqzI64\r\n          : UnaryOp.EqzI32,\r\n        module.createGetLocal(0, nativeSizeType)\r\n      ),\r\n      module.createReturn()\r\n    )\r\n  );\r\n\r\n  // remember the function index so we don't recurse infinitely\r\n  var functionTable = compiler.functionTable;\r\n  var gcHookIndex = functionTable.length;\r\n  functionTable.push(0);\r\n  classInstance.gcHookIndex = gcHookIndex;\r\n\r\n  // if the class extends a base class, call its hook first (calls mark)\r\n  var baseInstance = classInstance.base;\r\n  if (baseInstance) {\r\n    assert(baseInstance.type.isManaged(program));\r\n    body.push(\r\n      module.createCallIndirect(\r\n        module.createI32(\r\n          ensureGCHook(compiler, <Class>baseInstance.type.classReference)\r\n        ),\r\n        [\r\n          module.createGetLocal(0, nativeSizeType)\r\n        ],\r\n        nativeSizeType == NativeType.I64 ? \"Iv\" : \"iv\"\r\n      )\r\n    );\r\n\r\n  // if this class is the top-most base class, mark the instance\r\n  } else {\r\n    body.push(\r\n      module.createCall(assert(program.gcMarkInstance).internalName, [\r\n        module.createGetLocal(0, nativeSizeType)\r\n      ], NativeType.None)\r\n    );\r\n  }\r\n\r\n  // mark instances assigned to own fields that are again references\r\n  if (members) {\r\n    for (let member of members.values()) {\r\n      if (member.kind == ElementKind.FIELD) {\r\n        if ((<Field>member).parent === classInstance) {\r\n          let type = (<Field>member).type;\r\n          if (type.isManaged(program)) {\r\n            let offset = (<Field>member).memoryOffset;\r\n            assert(offset >= 0);\r\n            body.push(\r\n              module.createCall(assert(program.gcMarkInstance).internalName, [\r\n                module.createLoad(\r\n                  nativeSizeSize,\r\n                  false,\r\n                  module.createGetLocal(0, nativeSizeType),\r\n                  nativeSizeType,\r\n                  offset\r\n                )\r\n              ], NativeType.None)\r\n            );\r\n          }\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  // add the function to the module and return its table index\r\n  functionTable[gcHookIndex] = module.addFunction(\r\n    classInstance.internalName + \"~gc\",\r\n    compiler.ensureFunctionType(null, Type.void, options.usizeType),\r\n    null,\r\n    module.createBlock(null, body)\r\n  );\r\n  return gcHookIndex;\r\n}\r\n","/** @module util *//***/\r\n\r\n/** An enum of named character codes. */\r\nexport const enum CharCode {\r\n\r\n  NULL = 0,\r\n  LINEFEED = 0x0A,\r\n  CARRIAGERETURN = 0x0D,\r\n  LINESEPARATOR = 0x2028,\r\n  PARAGRAPHSEPARATOR = 0x2029,\r\n  NEXTLINE = 0x0085,\r\n\r\n  SPACE = 0x20,\r\n  NONBREAKINGSPACE = 0xA0,\r\n  ENQUAD = 0x2000,\r\n  EMQUAD = 0x2001,\r\n  ENSPACE = 0x2002,\r\n  EMSPACE = 0x2003,\r\n  THREEPEREMSPACE = 0x2004,\r\n  FOURPEREMSPACE = 0x2005,\r\n  SIXPEREMSPACE = 0x2006,\r\n  FIGURESPACE = 0x2007,\r\n  PUNCTUATIONSPACE = 0x2008,\r\n  THINSPACE = 0x2009,\r\n  HAIRSPACE = 0x200A,\r\n  ZEROWIDTHSPACE = 0x200B,\r\n  NARROWNOBREAKSPACE = 0x202F,\r\n  IDEOGRAPHICSPACE = 0x3000,\r\n  MATHEMATICALSPACE = 0x205F,\r\n  OGHAM = 0x1680,\r\n\r\n  _ = 0x5F,\r\n\r\n  _0 = 0x30,\r\n  _1 = 0x31,\r\n  _2 = 0x32,\r\n  _3 = 0x33,\r\n  _4 = 0x34,\r\n  _5 = 0x35,\r\n  _6 = 0x36,\r\n  _7 = 0x37,\r\n  _8 = 0x38,\r\n  _9 = 0x39,\r\n\r\n  a = 0x61,\r\n  b = 0x62,\r\n  c = 0x63,\r\n  d = 0x64,\r\n  e = 0x65,\r\n  f = 0x66,\r\n  g = 0x67,\r\n  h = 0x68,\r\n  i = 0x69,\r\n  j = 0x6A,\r\n  k = 0x6B,\r\n  l = 0x6C,\r\n  m = 0x6D,\r\n  n = 0x6E,\r\n  o = 0x6F,\r\n  p = 0x70,\r\n  q = 0x71,\r\n  r = 0x72,\r\n  s = 0x73,\r\n  t = 0x74,\r\n  u = 0x75,\r\n  v = 0x76,\r\n  w = 0x77,\r\n  x = 0x78,\r\n  y = 0x79,\r\n  z = 0x7A,\r\n\r\n  A = 0x41,\r\n  B = 0x42,\r\n  C = 0x43,\r\n  D = 0x44,\r\n  E = 0x45,\r\n  F = 0x46,\r\n  G = 0x47,\r\n  H = 0x48,\r\n  I = 0x49,\r\n  J = 0x4A,\r\n  K = 0x4B,\r\n  L = 0x4C,\r\n  M = 0x4D,\r\n  N = 0x4E,\r\n  O = 0x4F,\r\n  P = 0x50,\r\n  Q = 0x51,\r\n  R = 0x52,\r\n  S = 0x53,\r\n  T = 0x54,\r\n  U = 0x55,\r\n  V = 0x56,\r\n  W = 0x57,\r\n  X = 0x58,\r\n  Y = 0x59,\r\n  Z = 0x5a,\r\n\r\n  AMPERSAND = 0x26,\r\n  ASTERISK = 0x2A,\r\n  AT = 0x40,\r\n  BACKSLASH = 0x5C,\r\n  BACKTICK = 0x60,\r\n  BAR = 0x7C,\r\n  CARET = 0x5E,\r\n  CLOSEBRACE = 0x7D,\r\n  CLOSEBRACKET = 0x5D,\r\n  CLOSEPAREN = 0x29,\r\n  COLON = 0x3A,\r\n  COMMA = 0x2C,\r\n  DOLLAR = 0x24,\r\n  DOT = 0x2E,\r\n  DOUBLEQUOTE = 0x22,\r\n  EQUALS = 0x3D,\r\n  EXCLAMATION = 0x21,\r\n  GREATERTHAN = 0x3E,\r\n  HASH = 0x23,\r\n  LESSTHAN = 0x3C,\r\n  MINUS = 0x2D,\r\n  OPENBRACE = 0x7B,\r\n  OPENBRACKET = 0x5B,\r\n  OPENPAREN = 0x28,\r\n  PERCENT = 0x25,\r\n  PLUS = 0x2B,\r\n  QUESTION = 0x3F,\r\n  SEMICOLON = 0x3B,\r\n  SINGLEQUOTE = 0x27,\r\n  SLASH = 0x2F,\r\n  TILDE = 0x7E,\r\n\r\n  BACKSPACE = 0x08,\r\n  FORMFEED = 0x0C,\r\n  BYTEORDERMARK = 0xFEFF,\r\n  TAB = 0x09,\r\n  VERTICALTAB = 0x0B\r\n}\r\n\r\n/** Tests if the specified character code is some sort of line break. */\r\nexport function isLineBreak(c: CharCode): bool {\r\n  switch (c) {\r\n    case CharCode.LINEFEED:\r\n    case CharCode.CARRIAGERETURN:\r\n    case CharCode.LINESEPARATOR:\r\n    case CharCode.PARAGRAPHSEPARATOR: {\r\n      return true;\r\n    }\r\n    default: {\r\n      return false;\r\n    }\r\n  }\r\n}\r\n\r\n/** Tests if the specified character code is some sort of white space. */\r\nexport function isWhiteSpace(c: i32): bool {\r\n  switch (c) {\r\n    case CharCode.SPACE:\r\n    case CharCode.TAB:\r\n    case CharCode.VERTICALTAB:\r\n    case CharCode.FORMFEED:\r\n    case CharCode.NONBREAKINGSPACE:\r\n    case CharCode.NEXTLINE:\r\n    case CharCode.OGHAM:\r\n    case CharCode.NARROWNOBREAKSPACE:\r\n    case CharCode.MATHEMATICALSPACE:\r\n    case CharCode.IDEOGRAPHICSPACE:\r\n    case CharCode.BYTEORDERMARK: {\r\n      return true;\r\n    }\r\n    default: {\r\n      return c >= CharCode.ENQUAD && c <= CharCode.ZEROWIDTHSPACE;\r\n    }\r\n  }\r\n}\r\n\r\n/** Tests if the specified character code is a valid decimal digit. */\r\nexport function isDecimalDigit(c: i32): bool {\r\n  return c >= CharCode._0 && c <= CharCode._9;\r\n}\r\n\r\n/** Tests if the specified character code is a valid octal digit. */\r\nexport function isOctalDigit(c: i32): bool {\r\n  return c >= CharCode._0 && c <= CharCode._7;\r\n}\r\n\r\n/** Tests if the specified character code is a valid start of an identifier. */\r\nexport function isIdentifierStart(c: i32): bool {\r\n  return c >= CharCode.A && c <= CharCode.Z\r\n      || c >= CharCode.a && c <= CharCode.z\r\n      || c == CharCode.DOLLAR\r\n      || c == CharCode._\r\n      || c > 0x7f && isUnicodeIdentifierStart(c);\r\n}\r\n\r\n/** Tests if the specified character code is a valid keyword character. */\r\nexport function isKeywordCharacter(c: i32): bool {\r\n  return c >= CharCode.a && c <= CharCode.z;\r\n}\r\n\r\n/** Tests if the specified character code is a valid part of an identifier. */\r\nexport function isIdentifierPart(c: i32): bool {\r\n  return c >= CharCode.A && c <= CharCode.Z\r\n      || c >= CharCode.a && c <= CharCode.z\r\n      || c >= CharCode._0 && c <= CharCode._9\r\n      || c == CharCode.DOLLAR\r\n      || c == CharCode._\r\n      || c > 0x7f && isUnicodeIdentifierPart(c);\r\n}\r\n\r\n// storing as u16 to save memory\r\nconst unicodeIdentifierStart: u16[] = [\r\n  170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736,\r\n  740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906,\r\n  908, 908, 910, 929, 931,\r\n  1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514,\r\n  1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774,\r\n  1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969,\r\n  1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088,\r\n  2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384,\r\n  2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474,\r\n  2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529,\r\n  2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613,\r\n  2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705,\r\n  2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784,\r\n  2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873,\r\n  2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958,\r\n  2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986,\r\n  2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125,\r\n  3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240,\r\n  3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333,\r\n  3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455,\r\n  3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634,\r\n  3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725,\r\n  3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757,\r\n  3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840,\r\n  3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186,\r\n  4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293,\r\n  4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696,\r\n  4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798,\r\n  4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992,\r\n  5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872,\r\n  5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016,\r\n  6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389,\r\n  6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688,\r\n  6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141,\r\n  7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424,\r\n  7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025,\r\n  8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130,\r\n  8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188,\r\n  8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469,\r\n  8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505,\r\n  8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584,\r\n  11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520,\r\n  11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670,\r\n  11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720,\r\n  11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329,\r\n  12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540,\r\n  12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893,\r\n  19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538,\r\n  42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888,\r\n  42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015,\r\n  43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259,\r\n  43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520,\r\n  43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695,\r\n  43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739,\r\n  43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798,\r\n  43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243,\r\n  55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285,\r\n  64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323,\r\n  64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019,\r\n  65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474,\r\n  65479, 65482, 65487, 65490, 65495, 65498, 65500,\r\n];\r\nconst unicodeIdentifierPart: u16[] = [\r\n  170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736,\r\n  740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906,\r\n  908, 908, 910, 929, 931,\r\n  1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415,\r\n  1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520,\r\n  1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788,\r\n  1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112,\r\n  2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423,\r\n  2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482,\r\n  2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525,\r\n  2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602,\r\n  2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632,\r\n  2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693,\r\n  2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757,\r\n  2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821,\r\n  2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884,\r\n  2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929,\r\n  2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972,\r\n  2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018,\r\n  3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088,\r\n  3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157,\r\n  3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216,\r\n  3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285,\r\n  3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340,\r\n  3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424,\r\n  3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515,\r\n  3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570,\r\n  3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720,\r\n  3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751,\r\n  3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789,\r\n  3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895,\r\n  3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028,\r\n  4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304,\r\n  4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744,\r\n  4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808,\r\n  4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108,\r\n  5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902,\r\n  5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099,\r\n  6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272,\r\n  6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516,\r\n  6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783,\r\n  6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155,\r\n  7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676,\r\n  7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027,\r\n  8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134,\r\n  8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205,\r\n  8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417,\r\n  8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477,\r\n  8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517,\r\n  8521, 8526, 8526, 8544, 8584,\r\n  11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559,\r\n  11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686,\r\n  11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728,\r\n  11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335,\r\n  12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449,\r\n  12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799,\r\n  13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512,\r\n  42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783,\r\n  42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072,\r\n  43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309,\r\n  43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584,\r\n  43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741,\r\n  43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808,\r\n  43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203,\r\n  55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275,\r\n  64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321,\r\n  64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008,\r\n  65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140,\r\n  65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382,\r\n  65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,\r\n];\r\n\r\nfunction lookupInUnicodeMap(code: u16, map: u16[]): bool {\r\n  if (code < map[0]) return false;\r\n\r\n  var lo = 0;\r\n  var hi = map.length;\r\n  var mid: i32;\r\n\r\n  while (lo + 1 < hi) {\r\n    mid = lo + (hi - lo) / 2;\r\n    mid -= mid % 2;\r\n    if (map[mid] <= code && code <= map[mid + 1]) {\r\n      return true;\r\n    }\r\n    if (code < map[mid]) {\r\n      hi = mid;\r\n    } else {\r\n      lo = mid + 2;\r\n    }\r\n  }\r\n  return false;\r\n}\r\n\r\nfunction isUnicodeIdentifierStart(code: i32): bool {\r\n  return code < 0 || code > 0xffff ? false\r\n       : lookupInUnicodeMap(code as u16, unicodeIdentifierStart);\r\n}\r\n\r\nfunction isUnicodeIdentifierPart(code: i32): bool {\r\n  return code < 0 || code > 0xffff ? false\r\n       : lookupInUnicodeMap(code as u16, unicodeIdentifierPart);\r\n}\r\n","/** @module util *//***/\r\n\r\nimport {\r\n  CharCode\r\n} from \"./charcode\";\r\n\r\nconst separator = CharCode.SLASH;\r\n\r\n/**\r\n * Normalizes the specified path, removing interior placeholders.\r\n * Expects a posix-compatible relative path (not Windows compatible).\r\n */\r\nexport function normalizePath(path: string): string {\r\n  var pos = 0;\r\n  var len = path.length;\r\n\r\n  // trim leading './'\r\n  while (pos + 1 < len &&\r\n    path.charCodeAt(pos) == CharCode.DOT &&\r\n    path.charCodeAt(pos + 1) == separator\r\n  ) {\r\n    pos += 2;\r\n  }\r\n\r\n  if (pos > 0 || len < path.length) {\r\n    path = path.substring(pos, len);\r\n    len -= pos;\r\n    pos = 0;\r\n  }\r\n\r\n  var atEnd: bool;\r\n  while (pos + 1 < len) {\r\n    atEnd = false;\r\n\r\n    // we are only interested in '/.' sequences ...\r\n    if (\r\n      path.charCodeAt(pos) == separator &&\r\n      path.charCodeAt(pos + 1) == CharCode.DOT\r\n    ) {\r\n      // '/.' ( '/' | $ )\r\n      atEnd = pos + 2 == len;\r\n      if (atEnd ||\r\n        pos + 2 < len &&\r\n        path.charCodeAt(pos + 2) == separator\r\n      ) {\r\n        path = atEnd\r\n          ? path.substring(0, pos)\r\n          : path.substring(0, pos) + path.substring(pos + 2);\r\n        len -= 2;\r\n        continue;\r\n      }\r\n\r\n      // '/.' ( './' | '.' $ )\r\n      atEnd = pos + 3 == len;\r\n      if (atEnd && path.charCodeAt(pos + 2) == CharCode.DOT ||\r\n        pos + 3 < len &&\r\n        path.charCodeAt(pos + 2) == CharCode.DOT &&\r\n        path.charCodeAt(pos + 3) == separator\r\n      ) {\r\n        // find preceeding '/'\r\n        let ipos = pos;\r\n        while (--ipos >= 0) {\r\n          if (path.charCodeAt(ipos) == separator) {\r\n            if (pos - ipos != 3 ||\r\n              path.charCodeAt(ipos + 1) != CharCode.DOT ||\r\n              path.charCodeAt(ipos + 2) != CharCode.DOT\r\n            ) { // exclude '..' itself\r\n              path = atEnd\r\n                ? path.substring(0, ipos)\r\n                : path.substring(0, ipos) + path.substring(pos + 3);\r\n              len -= pos + 3 - ipos;\r\n              pos = ipos - 1; // incremented again at end of loop\r\n            }\r\n            break;\r\n          }\r\n        }\r\n\r\n        // if there's no preceeding '/', trim start if non-empty\r\n        if (ipos < 0 && pos > 0) {\r\n          if (pos != 2 ||\r\n            path.charCodeAt(0) != CharCode.DOT ||\r\n            path.charCodeAt(1) != CharCode.DOT\r\n          ) { // exclude '..' itself\r\n            path = path.substring(pos + 4);\r\n            len = path.length;\r\n            continue;\r\n          }\r\n        }\r\n      }\r\n    }\r\n    pos++;\r\n  }\r\n  return len > 0 ? path : \".\";\r\n}\r\n\r\n/** Resolves the specified path relative to the specified origin. */\r\nexport function resolvePath(normalizedPath: string, origin: string): string {\r\n  if (normalizedPath.startsWith(\"std/\")) {\r\n    return normalizedPath;\r\n  }\r\n  return normalizePath(\r\n    dirname(origin) + String.fromCharCode(separator) + normalizedPath\r\n  );\r\n}\r\n\r\n/** Obtains the directory portion of a normalized path. */\r\nexport function dirname(normalizedPath: string): string {\r\n  var pos = normalizedPath.length;\r\n  while (--pos > 0) {\r\n    if (normalizedPath.charCodeAt(pos) == separator) {\r\n      return normalizedPath.substring(0, pos);\r\n    }\r\n  }\r\n  return \".\";\r\n}\r\n","/** @module util *//***/\r\n\r\nconst indentX1 = \"  \";\r\nconst indentX2 = \"    \";\r\nconst indentX4 = \"        \";\r\n\r\n/** Creates an indentation matching the number of specified levels. */\r\nexport function indent(sb: string[], level: i32): void {\r\n  while (level >= 4) {\r\n    sb.push(indentX4);\r\n    level -= 4;\r\n  }\r\n  if (level >= 2) {\r\n    sb.push(indentX2);\r\n    level -= 2;\r\n  }\r\n  if (level) {\r\n    sb.push(indentX1);\r\n  }\r\n}\r\n","/** @module util *//***/\r\n\r\n/** Reads an 8-bit integer from the specified buffer. */\r\nexport function readI8(buffer: Uint8Array, offset: i32): i32 {\r\n  return buffer[offset];\r\n}\r\n\r\n/** Writes an 8-bit integer to the specified buffer. */\r\nexport function writeI8(value: i32, buffer: Uint8Array, offset: i32): void {\r\n  buffer[offset] = value;\r\n}\r\n\r\n/** Reads a 16-bit integer from the specified buffer. */\r\nexport function readI16(buffer: Uint8Array, offset: i32): i32 {\r\n  return buffer[offset    ]\r\n       | buffer[offset + 1] << 8;\r\n}\r\n\r\n/** Writes a 16-bit integer to the specified buffer. */\r\nexport function writeI16(value: i32, buffer: Uint8Array, offset: i32): void {\r\n  buffer[offset    ] = value;\r\n  buffer[offset + 1] = value >>> 8;\r\n}\r\n\r\n/** Reads a 32-bit integer from the specified buffer. */\r\nexport function readI32(buffer: Uint8Array, offset: i32): i32 {\r\n  return buffer[offset    ]\r\n       | buffer[offset + 1] << 8\r\n       | buffer[offset + 2] << 16\r\n       | buffer[offset + 3] << 24;\r\n}\r\n\r\n/** Writes a 32-bit integer to the specified buffer. */\r\nexport function writeI32(value: i32, buffer: Uint8Array, offset: i32): void {\r\n  buffer[offset    ] = value;\r\n  buffer[offset + 1] = value >>> 8;\r\n  buffer[offset + 2] = value >>> 16;\r\n  buffer[offset + 3] = value >>> 24;\r\n}\r\n\r\n/** Reads a 64-bit integer from the specified buffer. */\r\nexport function readI64(buffer: Uint8Array, offset: i32): I64 {\r\n  var lo = readI32(buffer, offset);\r\n  var hi = readI32(buffer, offset + 4);\r\n  return i64_new(lo, hi);\r\n}\r\n\r\n/** Writes a 64-bit integer to the specified buffer. */\r\nexport function writeI64(value: I64, buffer: Uint8Array, offset: i32): void {\r\n  writeI32(i64_low(value), buffer, offset);\r\n  writeI32(i64_high(value), buffer, offset + 4);\r\n}\r\n\r\n/** Reads a 32-bit float from the specified buffer. */\r\nexport function readF32(buffer: Uint8Array, offset: i32): f32 {\r\n  return i32_as_f32(readI32(buffer, offset));\r\n}\r\n\r\n/** Writes a 32-bit float to the specified buffer. */\r\nexport function writeF32(value: f32, buffer: Uint8Array, offset: i32): void {\r\n  writeI32(f32_as_i32(value), buffer, offset);\r\n}\r\n\r\n/** Reads a 64-bit float from the specified buffer. */\r\nexport function readF64(buffer: Uint8Array, offset: i32): f64 {\r\n  return i64_as_f64(readI64(buffer, offset));\r\n}\r\n\r\n/** Writes a 64-bit float to the specified buffer. */\r\nexport function writeF64(value: f64, buffer: Uint8Array, offset: i32): void {\r\n  var valueI64 = f64_as_i64(value);\r\n  writeI32(i64_low(valueI64), buffer, offset);\r\n  writeI32(i64_high(valueI64), buffer, offset + 4);\r\n}\r\n","/**\r\n * Low-level C-like compiler API.\r\n * @module index\r\n *//***/\r\n\r\nimport {\r\n  Compiler,\r\n  Options,\r\n  Target,\r\n  Feature\r\n} from \"./compiler\";\r\n\r\nimport {\r\n  Decompiler\r\n} from \"./decompiler\";\r\n\r\nimport {\r\n  IDLBuilder,\r\n  TSDBuilder\r\n} from \"./definitions\";\r\n\r\nimport {\r\n  DiagnosticMessage,\r\n  DiagnosticCategory,\r\n  formatDiagnosticMessage\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Module\r\n} from \"./module\";\r\n\r\nimport {\r\n  Parser\r\n} from \"./parser\";\r\n\r\nimport {\r\n  Program\r\n} from \"./program\";\r\n\r\n/** Parses a source file. If `parser` has been omitted a new one is created. */\r\nexport function parseFile(text: string, path: string, isEntry: bool = false,\r\n  parser: Parser | null = null\r\n): Parser {\r\n  if (!parser) parser = new Parser();\r\n  parser.parseFile(text, path, isEntry);\r\n  return parser;\r\n}\r\n\r\n/** Obtains the next required file's path. Returns `null` once complete. */\r\nexport function nextFile(parser: Parser): string | null {\r\n  return parser.nextFile();\r\n}\r\n\r\n/** Obtains the next diagnostic message. Returns `null` once complete. */\r\nexport function nextDiagnostic(parser: Parser): DiagnosticMessage | null {\r\n  var program = parser.program;\r\n  return program.diagnosticsOffset < program.diagnostics.length\r\n    ? program.diagnostics[program.diagnosticsOffset++]\r\n    : null;\r\n}\r\n\r\n/** Formats a diagnostic message to a string. */\r\nexport { formatDiagnosticMessage as formatDiagnostic };\r\n\r\n/** Tests whether a diagnostic is informatory. */\r\nexport function isInfo(message: DiagnosticMessage): bool {\r\n  return message.category == DiagnosticCategory.INFO;\r\n}\r\n\r\n/** Tests whether a diagnostic is a warning. */\r\nexport function isWarning(message: DiagnosticMessage): bool {\r\n  return message.category == DiagnosticCategory.WARNING;\r\n}\r\n\r\n/** Tests whether a diagnostic is an error. */\r\nexport function isError(message: DiagnosticMessage): bool {\r\n  return message.category == DiagnosticCategory.ERROR;\r\n}\r\n\r\n/** Creates a new set of compiler options. */\r\nexport function createOptions(): Options {\r\n  return new Options();\r\n}\r\n\r\n/** Sets the `target` option. */\r\nexport function setTarget(options: Options, target: Target): void {\r\n  options.target = target;\r\n}\r\n\r\n/** Sets the `noTreeShaking` option. */\r\nexport function setNoTreeShaking(options: Options, noTreeShaking: bool): void {\r\n  options.noTreeShaking = noTreeShaking;\r\n}\r\n\r\n/** Sets the `noAssert` option. */\r\nexport function setNoAssert(options: Options, noAssert: bool): void {\r\n  options.noAssert = noAssert;\r\n}\r\n\r\n/** Sets the `importMemory` option. */\r\nexport function setImportMemory(options: Options, importMemory: bool): void {\r\n  options.importMemory = importMemory;\r\n}\r\n\r\n/** Sets the `importTable` option. */\r\nexport function setImportTable(options: Options, importTable: bool): void {\r\n  options.importTable = importTable;\r\n}\r\n\r\n/** Sets the `sourceMap` option. */\r\nexport function setSourceMap(options: Options, sourceMap: bool): void {\r\n  options.sourceMap = sourceMap;\r\n}\r\n\r\n/** Sets the `memoryBase` option. */\r\nexport function setMemoryBase(options: Options, memoryBase: u32): void {\r\n  options.memoryBase = memoryBase;\r\n}\r\n\r\n/** Sets a 'globalAliases' value. */\r\nexport function setGlobalAlias(options: Options, name: string, alias: string): void {\r\n  var globalAliases = options.globalAliases;\r\n  if (!globalAliases) options.globalAliases = globalAliases = new Map();\r\n  globalAliases.set(name, alias);\r\n}\r\n\r\n/** Sign extension operations. */\r\nexport const FEATURE_SIGN_EXTENSION = Feature.SIGN_EXTENSION;\r\n/** Mutable global imports and exports. */\r\nexport const FEATURE_MUTABLE_GLOBAL = Feature.MUTABLE_GLOBAL;\r\n\r\n/** Enables a specific feature. */\r\nexport function enableFeature(options: Options, feature: Feature): void {\r\n  options.features |= feature;\r\n}\r\n\r\n/** Gives the compiler a hint at the optimize levels that will be used later on. */\r\nexport function setOptimizeLevelHints(options: Options, optimizeLevel: i32, shrinkLevel: i32): void {\r\n  options.optimizeLevelHint = optimizeLevel;\r\n  options.shrinkLevelHint = shrinkLevel;\r\n}\r\n\r\n/** Finishes parsing. */\r\nexport function finishParsing(parser: Parser): Program {\r\n  return parser.finish();\r\n}\r\n\r\n/** Compiles the sources computed by the parser to a module. */\r\nexport function compileProgram(program: Program, options: Options | null = null): Module {\r\n  return new Compiler(program, options).compile();\r\n}\r\n\r\n/** Decompiles a module to its (low level) source. */\r\nexport function decompileModule(module: Module): string {\r\n  var decompiler = new Decompiler();\r\n  decompiler.decompile(module);\r\n  return decompiler.finish();\r\n}\r\n\r\n/** Builds WebIDL definitions for the specified program. */\r\nexport function buildIDL(program: Program): string {\r\n  return IDLBuilder.build(program);\r\n}\r\n\r\n/** Builds TypeScript definitions for the specified program. */\r\nexport function buildTSD(program: Program): string {\r\n  return TSDBuilder.build(program);\r\n}\r\n\r\n/** Prefix indicating a library file. */\r\nexport { LIBRARY_PREFIX } from \"./common\";\r\n","/**\r\n * A decompiler that generates low-level AssemblyScript from WebAssembly binaries.\r\n * @module decompiler\r\n *//***/\r\n\r\nimport {\r\n  Module,\r\n  NativeType,\r\n  ExpressionId,\r\n  UnaryOp,\r\n  BinaryOp,\r\n  HostOp,\r\n  FunctionRef,\r\n  ExpressionRef,\r\n  Index,\r\n  getFunctionName,\r\n  getFunctionBody,\r\n  getFunctionParamCount,\r\n  getFunctionParamType,\r\n  getFunctionResultType,\r\n  getExpressionId,\r\n  getExpressionType,\r\n  getBlockName,\r\n  getBlockChildCount,\r\n  getBlockChild,\r\n  getIfCondition,\r\n  getIfTrue,\r\n  getIfFalse,\r\n  getLoopName,\r\n  getLoopBody,\r\n  getBreakName,\r\n  getBreakCondition,\r\n  getGetLocalIndex,\r\n  getSetLocalIndex,\r\n  getSetLocalValue,\r\n  getLoadOffset,\r\n  getLoadPtr,\r\n  getStoreOffset,\r\n  getStorePtr,\r\n  getStoreValue,\r\n  getConstValueI32,\r\n  getConstValueI64Low,\r\n  getConstValueI64High,\r\n  getConstValueF32,\r\n  getConstValueF64,\r\n  getUnaryOp,\r\n  getUnaryValue,\r\n  getBinaryOp,\r\n  getBinaryLeft,\r\n  getBinaryRight,\r\n  getSelectThen,\r\n  getSelectElse,\r\n  getSelectCondition,\r\n  getDropValue,\r\n  getReturnValue,\r\n  getHostOp,\r\n  getHostOperand\r\n} from \"./module\";\r\n\r\n// TODO :-)\r\n\r\nexport class Decompiler {\r\n\r\n  static decompile(module: Module): string {\r\n    var decompiler = new Decompiler();\r\n    decompiler.decompile(module);\r\n    return decompiler.finish();\r\n  }\r\n\r\n  text: string[] = [];\r\n  functionId: i32 = 0;\r\n\r\n  constructor() { }\r\n\r\n  /** Decompiles a module to an AST that can then be serialized. */\r\n  decompile(module: Module): void {\r\n    throw new Error(\"not implemented\");\r\n  }\r\n\r\n  decompileFunction(func: FunctionRef): void {\r\n    var name = getFunctionName(func) || \"$\" + this.functionId.toString(10);\r\n    var body = getFunctionBody(func);\r\n    this.push(\"function \");\r\n    this.push(name);\r\n    this.push(\"(\");\r\n     for (let i: Index = 0, k: Index = getFunctionParamCount(func); i < k; ++i) {\r\n      if (i > 0) this.push(\", \");\r\n      this.push(\"$\");\r\n      this.push(i.toString(10));\r\n      this.push(\": \");\r\n      this.push(nativeTypeToType(getFunctionParamType(func, i)));\r\n    }\r\n    this.push(\"): \");\r\n    this.push(nativeTypeToType(getFunctionResultType(func)));\r\n    this.push(\" \");\r\n    if (getExpressionId(body) != ExpressionId.Block) {\r\n      this.push(\"{\\n\");\r\n    }\r\n    this.decompileExpression(body);\r\n    if (getExpressionId(body) != ExpressionId.Block) {\r\n      this.push(\"\\n}\\n\");\r\n    }\r\n    ++this.functionId;\r\n  }\r\n\r\n  decompileExpression(expr: ExpressionRef): void {\r\n    var id = getExpressionId(expr);\r\n    var type = getExpressionType(expr);\r\n\r\n    var nested: ExpressionRef;\r\n    var string: string | null;\r\n    var i: Index, k: Index;\r\n\r\n    switch (id) {\r\n      case ExpressionId.Block: { // TODO: magic\r\n        if ((string = getBlockName(expr)) != null) {\r\n          this.push(string);\r\n          this.push(\": \");\r\n        }\r\n        this.push(\"{\\n\");\r\n        k = getBlockChildCount(expr);\r\n        for (i = 0; i < k; ++i) {\r\n          this.decompileExpression(getBlockChild(expr, i));\r\n        }\r\n        this.push(\"}\\n\");\r\n        return;\r\n      }\r\n      case ExpressionId.If: {\r\n        if (type == NativeType.None) {\r\n          this.push(\"if (\");\r\n          this.decompileExpression(getIfCondition(expr));\r\n          this.push(\") \");\r\n          this.decompileExpression(getIfTrue(expr));\r\n          if (nested = getIfFalse(expr)) {\r\n            this.push(\" else \");\r\n            this.decompileExpression(nested);\r\n          }\r\n        } else {\r\n          this.decompileExpression(getIfCondition(expr));\r\n          this.push(\" ? \");\r\n          this.decompileExpression(getIfTrue(expr));\r\n          this.push(\" : \");\r\n          this.decompileExpression(getIfFalse(expr));\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Loop: {\r\n        if ((string = getLoopName(expr)) != null) {\r\n          this.push(string);\r\n          this.push(\": \");\r\n        }\r\n        this.push(\"do \");\r\n        this.decompileExpression(getLoopBody(expr));\r\n        this.push(\"while (0);\\n\");\r\n      }\r\n      case ExpressionId.Break: {\r\n        if (nested = getBreakCondition(expr)) {\r\n          this.push(\"if (\");\r\n          this.decompileExpression(nested);\r\n          this.push(\") \");\r\n        }\r\n        if ((string = getBreakName(expr)) != null) {\r\n          this.push(\"break \");\r\n          this.push(string);\r\n          this.push(\";\\n\");\r\n        } else {\r\n          this.push(\"break;\\n\");\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Switch:\r\n      case ExpressionId.Call:\r\n      case ExpressionId.CallImport:\r\n      case ExpressionId.CallIndirect: {\r\n        throw new Error(\"not implemented\");\r\n      }\r\n      case ExpressionId.GetLocal: {\r\n        this.push(\"$\");\r\n        this.push(getGetLocalIndex(expr).toString(10));\r\n        return;\r\n      }\r\n      case ExpressionId.SetLocal: {\r\n        this.push(\"$\");\r\n        this.push(getSetLocalIndex(expr).toString(10));\r\n        this.push(\" = \");\r\n        this.decompileExpression(getSetLocalValue(expr));\r\n        return;\r\n      }\r\n      case ExpressionId.GetGlobal:\r\n      case ExpressionId.SetGlobal: {\r\n        throw new Error(\"not implemented\");\r\n      }\r\n      case ExpressionId.Load: {\r\n        this.push(\"load<\");\r\n        this.push(nativeTypeToType(type));\r\n        this.push(\">(\");\r\n        this.push(getLoadOffset(expr).toString(10));\r\n        this.push(\" + \");\r\n        this.decompileExpression(getLoadPtr(expr));\r\n        this.push(\")\");\r\n        return;\r\n      }\r\n      case ExpressionId.Store: {\r\n        this.push(\"store<\");\r\n        this.push(nativeTypeToType(type));\r\n        this.push(\">(\");\r\n        this.push(getStoreOffset(expr).toString(10));\r\n        this.push(\" + \");\r\n        this.decompileExpression(getStorePtr(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(getStoreValue(expr));\r\n        this.push(\")\");\r\n        return;\r\n      }\r\n      case ExpressionId.Const: {\r\n        switch (type) {\r\n          case NativeType.I32: {\r\n            this.push(getConstValueI32(expr).toString(10));\r\n            return;\r\n          }\r\n          case NativeType.I64: {\r\n            this.push(\r\n              i64_to_string(\r\n                i64_new(\r\n                  getConstValueI64Low(expr),\r\n                  getConstValueI64High(expr)\r\n                )\r\n              )\r\n            );\r\n            return;\r\n          }\r\n          case NativeType.F32: {\r\n            this.push(getConstValueF32(expr).toString(10));\r\n            return;\r\n          }\r\n          case NativeType.F64: {\r\n            this.push(getConstValueF64(expr).toString(10));\r\n            return;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ExpressionId.Unary: {\r\n        switch (getUnaryOp(expr)) {\r\n          case UnaryOp.ClzI32: {\r\n            this.push(\"clz<i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.CtzI32: {\r\n            this.push(\"ctz<i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.PopcntI32: {\r\n            this.push(\"popcnt<i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.NegF32:\r\n          case UnaryOp.NegF64: {\r\n            this.push(\"-\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.AbsF32: {\r\n            this.push(\"abs<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.CeilF32: {\r\n            this.push(\"ceil<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.FloorF32: {\r\n            this.push(\"floor<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32: {\r\n            this.push(\"trunc<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.NearestF32: {\r\n            this.push(\"nearest<i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.SqrtF32: {\r\n            this.push(\"sqrt<f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.EqzI32:\r\n          case UnaryOp.EqzI64: {\r\n            this.push(\"!\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ClzI64: {\r\n            this.push(\"clz<i64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.CtzI64: {\r\n            this.push(\"ctz<i64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.PopcntI64: {\r\n            this.push(\"popcnt<i64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.AbsF64: {\r\n            this.push(\"abs<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.CeilF64: {\r\n            this.push(\"ceil<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.FloorF64: {\r\n            this.push(\"floor<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64: {\r\n            this.push(\"trunc<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.NearestF64: {\r\n            this.push(\"nearest<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.SqrtF64: {\r\n            this.push(\"sqrt<f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ExtendI32: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ExtendU32: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.WrapI64: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToI32: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToI64: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToU32: {\r\n            this.push(\"<i32><u32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToU64: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToI32: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToI64: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToU32: {\r\n            this.push(\"<i32><u32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToU64: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretF32: {\r\n            this.push(\"reinterpret<f32,i32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretF64: {\r\n            this.push(\"reinterpret<f64,i64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI32ToF32: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI32ToF64: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU32ToF32: {\r\n            this.push(\"<f32><u32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU32ToF64: {\r\n            this.push(\"<f64><u32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI64ToF32: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI64ToF64: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU64ToF32: {\r\n            this.push(\"<f32><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU64ToF64: {\r\n            this.push(\"<f64><u64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.PromoteF32: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.DemoteF64: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretI32: {\r\n            this.push(\"reinterpret<i32,f32>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretI64: {\r\n            this.push(\"reinterpret<i64,f64>(\");\r\n            this.decompileExpression(getUnaryValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ExpressionId.Binary: { // TODO: precedence\r\n        switch (getBinaryOp(expr)) {\r\n          case BinaryOp.AddI32:\r\n          case BinaryOp.AddI64:\r\n          case BinaryOp.AddF32:\r\n          case BinaryOp.AddF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" + \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.SubI32:\r\n          case BinaryOp.SubI64:\r\n          case BinaryOp.SubF32:\r\n          case BinaryOp.SubF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" - \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.MulI32:\r\n          case BinaryOp.MulI64:\r\n          case BinaryOp.MulF32:\r\n          case BinaryOp.MulF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" * \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivI32:\r\n          case BinaryOp.DivI64:\r\n          case BinaryOp.DivF32:\r\n          case BinaryOp.DivF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" / \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivU32: {\r\n            this.push(\"<i32>(<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" / <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.RemI32:\r\n          case BinaryOp.RemI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" % \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RemU32: {\r\n            this.push(\"<i32>(<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" / <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.AndI32:\r\n          case BinaryOp.AndI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" & \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.OrI32:\r\n          case BinaryOp.OrI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" | \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.XorI32:\r\n          case BinaryOp.XorI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" ^ \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShlI32:\r\n          case BinaryOp.ShlI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" << \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShrU32:\r\n          case BinaryOp.ShrU64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >>> \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShrI32:\r\n          case BinaryOp.ShrI64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >> \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RotlI32: {\r\n            this.push(\"rotl<i32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.RotrI32: {\r\n            this.push(\"rotr<i32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.EqI32:\r\n          case BinaryOp.EqI64:\r\n          case BinaryOp.EqF32:\r\n          case BinaryOp.EqF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" == \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.NeI32:\r\n          case BinaryOp.NeI64:\r\n          case BinaryOp.NeF32:\r\n          case BinaryOp.NeF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" != \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LtI32:\r\n          case BinaryOp.LtI64:\r\n          case BinaryOp.LtF32:\r\n          case BinaryOp.LtF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" < \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LtU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" < <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeI32:\r\n          case BinaryOp.LeI64:\r\n          case BinaryOp.LeF32:\r\n          case BinaryOp.LeF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" <= \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" <= <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtI32:\r\n          case BinaryOp.GtI64:\r\n          case BinaryOp.GtF32:\r\n          case BinaryOp.GtF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" > \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" > <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeI32:\r\n          case BinaryOp.GeI64:\r\n          case BinaryOp.GeF32:\r\n          case BinaryOp.GeF64: {\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >= \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >= <u32>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" / <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RemU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" % <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RotlI64: {\r\n            this.push(\"rotl<i64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.RotrI64: {\r\n            this.push(\"rotr<i64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.LtU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" < <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" <= <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" > <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\" >= <u64>\");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.CopysignF32: {\r\n            this.push(\"copysign<f32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.MinF32: {\r\n            this.push(\"min<f32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.MaxF32: {\r\n            this.push(\"max<f32>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.CopysignF64: {\r\n            this.push(\"copysign<f64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.MinF64: {\r\n            this.push(\"min<f64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.MaxF64: {\r\n            this.push(\"max<f64>(\");\r\n            this.decompileExpression(getBinaryLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(getBinaryRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Select: {\r\n        this.push(\"select<\");\r\n        this.push(nativeTypeToType(type));\r\n        this.push(\">(\");\r\n        this.decompileExpression(getSelectThen(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(getSelectElse(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(getSelectCondition(expr));\r\n        this.push(\")\");\r\n        return;\r\n      }\r\n      case ExpressionId.Drop: {\r\n        this.decompileExpression(getDropValue(expr));\r\n        this.push(\";\\n\");\r\n        return;\r\n      }\r\n      case ExpressionId.Return: {\r\n        if (nested = getReturnValue(expr)) {\r\n          this.push(\"return \");\r\n          this.decompileExpression(nested);\r\n          this.push(\";\\n\");\r\n        } else {\r\n          this.push(\"return;\\n\");\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Host: {\r\n        switch (getHostOp(expr)) {\r\n          case HostOp.CurrentMemory: {\r\n            this.push(\"memory.size()\");\r\n            return;\r\n          }\r\n          case HostOp.GrowMemory: {\r\n            this.push(\"memory.grow(\");\r\n            this.decompileExpression(getHostOperand(expr, 0));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ExpressionId.Nop: {\r\n        this.push(\";\\n\");\r\n        return;\r\n      }\r\n      case ExpressionId.Unreachable: {\r\n        this.push(\"unreachable()\");\r\n        return;\r\n      }\r\n      case ExpressionId.AtomicCmpxchg:\r\n      case ExpressionId.AtomicRMW:\r\n      case ExpressionId.AtomicWait:\r\n      case ExpressionId.AtomicWake:\r\n    }\r\n    throw new Error(\"not implemented\");\r\n  }\r\n\r\n  private push(text: string): void {\r\n    // mostly here so we can add debugging if necessary\r\n    this.text.push(text);\r\n  }\r\n\r\n  finish(): string {\r\n    var ret = this.text.join(\"\");\r\n    this.text = [];\r\n    return ret;\r\n  }\r\n}\r\n\r\nfunction nativeTypeToType(type: NativeType): string {\r\n  switch (type) {\r\n    case NativeType.None: return \"void\";\r\n    case NativeType.I32: return \"i32\";\r\n    case NativeType.I64: return \"i64\";\r\n    case NativeType.F32: return \"f32\";\r\n    case NativeType.F64: return \"f64\";\r\n    case NativeType.Unreachable: throw new Error(\"unreachable type\");\r\n    case NativeType.Auto: throw new Error(\"auto type\");\r\n    default: throw new Error(\"unexpected type\");\r\n  }\r\n}\r\n","/**\r\n * Definition builders for WebIDL and TypeScript.\r\n * @module definitions\r\n *//***/\r\n\r\nimport {\r\n  CommonFlags\r\n} from \"./common\";\r\n\r\nimport {\r\n  Program,\r\n  Element,\r\n  ElementKind,\r\n  Global,\r\n  Enum,\r\n  EnumValue,\r\n  Field,\r\n  Function,\r\n  FunctionPrototype,\r\n  Class,\r\n  ClassPrototype,\r\n  Namespace,\r\n  ConstantValueKind,\r\n  Interface,\r\n  Property\r\n} from \"./program\";\r\n\r\nimport {\r\n  Type,\r\n  TypeKind\r\n} from \"./types\";\r\n\r\nimport {\r\n  indent\r\n} from \"./util\";\r\n\r\n/** Walker base class. */\r\nabstract class ExportsWalker {\r\n\r\n  /** Program reference. */\r\n  program: Program;\r\n  /** Whether to include private members */\r\n  includePrivate: bool;\r\n  /** Elements still to do. */\r\n  todo: Element[] = [];\r\n  /** Already seen elements. */\r\n  seen: Set<Element> = new Set();\r\n\r\n  /** Constructs a new Element walker. */\r\n  constructor(program: Program, includePrivate: bool = false) {\r\n    this.program = program;\r\n    this.includePrivate;\r\n  }\r\n\r\n  /** Walks all exports and calls the respective handlers. */\r\n  walk(): void {\r\n    for (let moduleExport of this.program.moduleLevelExports.values()) {\r\n      // FIXME: doesn't honor the actual externally visible name\r\n      this.visitElement(moduleExport.element);\r\n    }\r\n    var todo = this.todo;\r\n    for (let i = 0; i < todo.length; ) this.visitElement(todo[i]);\r\n  }\r\n\r\n  /** Visits an element.*/\r\n  visitElement(element: Element): void {\r\n    if (element.is(CommonFlags.PRIVATE) && !this.includePrivate) return;\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\r\n    switch (element.kind) {\r\n      case ElementKind.GLOBAL: {\r\n        if (element.is(CommonFlags.COMPILED)) this.visitGlobal(<Global>element);\r\n        break;\r\n      }\r\n      case ElementKind.ENUM: {\r\n        if (element.is(CommonFlags.COMPILED)) this.visitEnum(<Enum>element);\r\n        break;\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        this.visitFunctionInstances(<FunctionPrototype>element);\r\n        break;\r\n      }\r\n      case ElementKind.CLASS_PROTOTYPE: {\r\n        this.visitClassInstances(<ClassPrototype>element);\r\n        break;\r\n      }\r\n      case ElementKind.FIELD: {\r\n        if ((<Field>element).is(CommonFlags.COMPILED)) this.visitField(<Field>element);\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let prop = <Property>element;\r\n        let getter = prop.getterPrototype;\r\n        if (getter) this.visitFunctionInstances(getter);\r\n        let setter = prop.setterPrototype;\r\n        if (setter) this.visitFunctionInstances(setter);\r\n        break;\r\n      }\r\n      case ElementKind.NAMESPACE: {\r\n        if (hasCompiledMember(element)) this.visitNamespace(element);\r\n        break;\r\n      }\r\n      default: assert(false);\r\n    }\r\n  }\r\n\r\n  private visitFunctionInstances(element: FunctionPrototype): void {\r\n    for (let instance of element.instances.values()) {\r\n      if (instance.is(CommonFlags.COMPILED)) this.visitFunction(<Function>instance);\r\n    }\r\n  }\r\n\r\n  private visitClassInstances(element: ClassPrototype): void {\r\n    for (let instance of element.instances.values()) {\r\n      if (instance.is(CommonFlags.COMPILED)) this.visitClass(<Class>instance);\r\n    }\r\n  }\r\n\r\n  abstract visitGlobal(element: Global): void;\r\n  abstract visitEnum(element: Enum): void;\r\n  abstract visitFunction(element: Function): void;\r\n  abstract visitClass(element: Class): void;\r\n  abstract visitInterface(element: Interface): void;\r\n  abstract visitField(element: Field): void;\r\n  abstract visitNamespace(element: Element): void;\r\n}\r\n\r\n/** A WebIDL definitions builder. */\r\nexport class IDLBuilder extends ExportsWalker {\r\n\r\n  /** Builds WebIDL definitions for the specified program. */\r\n  static build(program: Program): string {\r\n    return new IDLBuilder(program).build();\r\n  }\r\n\r\n  private sb: string[] = [];\r\n  private indentLevel: i32 = 0;\r\n\r\n  /** Constructs a new WebIDL builder. */\r\n  constructor(program: Program, includePrivate: bool = false) {\r\n    super(program, includePrivate);\r\n  }\r\n\r\n  visitGlobal(element: Global): void {\r\n    var sb = this.sb;\r\n    var isConst = element.is(CommonFlags.INLINED);\r\n    indent(sb, this.indentLevel);\r\n    if (isConst) sb.push(\"const \");\r\n    sb.push(this.typeToString(element.type));\r\n    sb.push(\" \");\r\n    sb.push(element.simpleName);\r\n    if (isConst) {\r\n      switch (element.constantValueKind) {\r\n        case ConstantValueKind.INTEGER: {\r\n          sb.push(\" = \");\r\n          sb.push(i64_to_string(element.constantIntegerValue));\r\n          break;\r\n        }\r\n        case ConstantValueKind.FLOAT: {\r\n          sb.push(\" = \");\r\n          sb.push(element.constantFloatValue.toString());\r\n          break;\r\n        }\r\n        default: assert(false);\r\n      }\r\n    }\r\n    sb.push(\";\\n\");\r\n  }\r\n\r\n  visitEnum(element: Enum): void {\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel++);\r\n    sb.push(\"interface \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\" {\\n\");\r\n    var members = element.members;\r\n    if (members) {\r\n      for (let [name, member] of members) {\r\n        if (member.kind == ElementKind.ENUMVALUE) {\r\n          let isConst = (<EnumValue>member).is(CommonFlags.INLINED);\r\n          indent(sb, this.indentLevel);\r\n          if (isConst) sb.push(\"const \");\r\n          else sb.push(\"readonly \");\r\n          sb.push(\"unsigned long \");\r\n          sb.push(name);\r\n          if (isConst) {\r\n            sb.push(\" = \");\r\n            sb.push((<EnumValue>member).constantValue.toString(10));\r\n          }\r\n          sb.push(\";\\n\");\r\n        }\r\n      }\r\n      for (let member of members.values()) {\r\n        if (member.kind != ElementKind.ENUMVALUE) this.visitElement(member);\r\n      }\r\n    }\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  visitFunction(element: Function): void {\r\n    var sb = this.sb;\r\n    var signature = element.signature;\r\n    indent(sb, this.indentLevel);\r\n    sb.push(this.typeToString(signature.returnType));\r\n    sb.push(\" \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\"(\");\r\n    var parameters = signature.parameterTypes;\r\n    var numParameters = parameters.length;\r\n    // var requiredParameters = signature.requiredParameters;\r\n    for (let i = 0; i < numParameters; ++i) {\r\n      if (i) sb.push(\", \");\r\n      // if (i >= requiredParameters) sb.push(\"optional \");\r\n      sb.push(this.typeToString(parameters[i]));\r\n      sb.push(\" \");\r\n      sb.push(signature.getParameterName(i));\r\n    }\r\n    sb.push(\");\\n\");\r\n    var members = element.members;\r\n    if (members && members.size) {\r\n      indent(sb, this.indentLevel);\r\n      sb.push(\"interface \");\r\n      sb.push(element.simpleName);\r\n      sb.push(\" {\\n\");\r\n      for (let member of members.values()) this.visitElement(member);\r\n      indent(sb, --this.indentLevel);\r\n      sb.push(\"}\\n\");\r\n    }\r\n  }\r\n\r\n  visitClass(element: Class): void {\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel++);\r\n    sb.push(\"interface \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\" {\\n\");\r\n    // TODO\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  visitInterface(element: Interface): void {\r\n    this.visitClass(element);\r\n  }\r\n\r\n  visitField(element: Field): void {\r\n    // TODO\r\n  }\r\n\r\n  visitNamespace(element: Namespace): void {\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel++);\r\n    sb.push(\"interface \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\" {\\n\");\r\n    var members = element.members;\r\n    if (members) {\r\n      for (let member of members.values()) this.visitElement(member);\r\n    }\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  typeToString(type: Type): string {\r\n    switch (type.kind) {\r\n      case TypeKind.I8: return \"byte\";\r\n      case TypeKind.I16: return \"short\";\r\n      case TypeKind.I32: return \"long\";\r\n      case TypeKind.I64: return \"long long\";\r\n      case TypeKind.ISIZE: return this.program.options.isWasm64 ? \"long long\" : \"long\";\r\n      case TypeKind.U8: return \"octet\";\r\n      case TypeKind.U16: return \"unsigned short\";\r\n      case TypeKind.U32: return \"unsigned long\";\r\n        // ^ TODO: function types\r\n      case TypeKind.U64: return \"unsigned long long\";\r\n      case TypeKind.USIZE: return this.program.options.isWasm64 ? \"unsigned long long\" : \"unsigned long\";\r\n        // ^ TODO: class types\r\n      case TypeKind.BOOL: return \"boolean\";\r\n      case TypeKind.F32: return \"unrestricted float\";\r\n      case TypeKind.F64: return \"unrestricted double\";\r\n      case TypeKind.VOID: return \"void\";\r\n      default: {\r\n        assert(false);\r\n        return \"\";\r\n      }\r\n    }\r\n  }\r\n\r\n  build(): string {\r\n    var sb = this.sb;\r\n    sb.push(\"interface ASModule {\\n\");\r\n    ++this.indentLevel;\r\n    this.walk();\r\n    --this.indentLevel;\r\n    sb.push(\"}\\n\");\r\n    return sb.join(\"\");\r\n  }\r\n}\r\n\r\n/** A TypeScript definitions builder. */\r\nexport class TSDBuilder extends ExportsWalker {\r\n\r\n  /** Builds TypeScript definitions for the specified program. */\r\n  static build(program: Program): string {\r\n    return new TSDBuilder(program).build();\r\n  }\r\n\r\n  private sb: string[] = [];\r\n  private indentLevel: i32 = 0;\r\n\r\n  /** Constructs a new WebIDL builder. */\r\n  constructor(program: Program, includePrivate: bool = false) {\r\n    super(program, includePrivate);\r\n  }\r\n\r\n  visitGlobal(element: Global): void {\r\n    var sb = this.sb;\r\n    var isConst = element.is(CommonFlags.INLINED);\r\n    indent(sb, this.indentLevel);\r\n    if (element.is(CommonFlags.STATIC)) {\r\n      if (isConst) sb.push(\"static readonly \");\r\n      else sb.push(\"static \");\r\n    } else {\r\n      if (isConst) sb.push(\"const \");\r\n      else sb.push(\"var \");\r\n    }\r\n    sb.push(element.simpleName);\r\n    sb.push(\": \");\r\n    sb.push(this.typeToString(element.type));\r\n    sb.push(\";\\n\");\r\n    this.visitNamespace(element);\r\n  }\r\n\r\n  visitEnum(element: Enum): void {\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel++);\r\n    sb.push(\"enum \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\" {\\n\");\r\n    var members = element.members;\r\n    if (members) {\r\n      let numMembers = members.size;\r\n      for (let [name, member] of members) {\r\n        if (member.kind == ElementKind.ENUMVALUE) {\r\n          indent(sb, this.indentLevel);\r\n          sb.push(name);\r\n          if (member.is(CommonFlags.INLINED)) {\r\n            sb.push(\" = \");\r\n            sb.push((<EnumValue>member).constantValue.toString(10));\r\n          }\r\n          sb.push(\",\\n\");\r\n          --numMembers;\r\n        }\r\n      }\r\n      if (numMembers) this.visitNamespace(element);\r\n    }\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  visitFunction(element: Function): void {\r\n    if (element.isAny(CommonFlags.PRIVATE | CommonFlags.SET)) return;\r\n    var sb = this.sb;\r\n    var signature = element.signature;\r\n    indent(sb, this.indentLevel);\r\n    if (element.is(CommonFlags.PROTECTED)) sb.push(\"protected \");\r\n    if (element.is(CommonFlags.STATIC)) sb.push(\"static \");\r\n    if (element.is(CommonFlags.GET)) {\r\n      sb.push(element.prototype.declaration.name.text); // 'get:funcName' internally\r\n      sb.push(\": \");\r\n      sb.push(this.typeToString(signature.returnType));\r\n      sb.push(\";\\n\");\r\n      return;\r\n    } else {\r\n      if (!element.isAny(CommonFlags.STATIC | CommonFlags.INSTANCE)) sb.push(\"function \");\r\n      sb.push(element.simpleName);\r\n    }\r\n    sb.push(\"(\");\r\n    var parameters = signature.parameterTypes;\r\n    var numParameters = parameters.length;\r\n    // var requiredParameters = signature.requiredParameters;\r\n    for (let i = 0; i < numParameters; ++i) {\r\n      if (i) sb.push(\", \");\r\n      // if (i >= requiredParameters) sb.push(\"optional \");\r\n      sb.push(signature.getParameterName(i));\r\n      sb.push(\": \");\r\n      sb.push(this.typeToString(parameters[i]));\r\n    }\r\n    if (element.isAny(CommonFlags.CONSTRUCTOR | CommonFlags.SET)) {\r\n      sb.push(\")\");\r\n    } else {\r\n      sb.push(\"): \");\r\n      sb.push(this.typeToString(signature.returnType));\r\n    }\r\n    sb.push(\";\\n\");\r\n    this.visitNamespace(element);\r\n  }\r\n\r\n  visitClass(element: Class): void {\r\n    var sb = this.sb;\r\n    var isInterface = element.kind == ElementKind.INTERFACE;\r\n    indent(sb, this.indentLevel++);\r\n    if (isInterface) {\r\n      sb.push(\"interface \");\r\n    } else {\r\n      if (element.is(CommonFlags.ABSTRACT)) sb.push(\"abstract \");\r\n      sb.push(\"class \");\r\n    }\r\n    sb.push(element.simpleName);\r\n    var base = element.base;\r\n    if (base && base.is(CommonFlags.COMPILED | CommonFlags.MODULE_EXPORT)) {\r\n      sb.push(\" extends \");\r\n      sb.push(base.simpleName); // TODO: fqn\r\n    }\r\n    sb.push(\" {\\n\");\r\n    var members = element.prototype.members; // static\r\n    if (members) {\r\n      for (let member of members.values()) {\r\n        this.visitElement(member);\r\n      }\r\n    }\r\n    var ctor = element.constructorInstance;\r\n    if (ctor) this.visitFunction(ctor);\r\n    members = element.members; // instance\r\n    if (members) {\r\n      for (let member of members.values()) this.visitElement(member);\r\n    }\r\n    indent(sb, --this.indentLevel);\r\n    sb.push(\"}\\n\");\r\n  }\r\n\r\n  visitInterface(element: Interface): void {\r\n    this.visitClass(element);\r\n  }\r\n\r\n  visitField(element: Field): void {\r\n    if (element.is(CommonFlags.PRIVATE)) return;\r\n    var sb = this.sb;\r\n    indent(sb, this.indentLevel);\r\n    if (element.is(CommonFlags.PROTECTED)) sb.push(\"protected \");\r\n    if (element.is(CommonFlags.STATIC)) sb.push(\"static \");\r\n    if (element.is(CommonFlags.READONLY)) sb.push(\"readonly \");\r\n    sb.push(element.simpleName);\r\n    sb.push(\": \");\r\n    sb.push(this.typeToString(element.type));\r\n    sb.push(\";\\n\");\r\n  }\r\n\r\n  visitNamespace(element: Element): void {\r\n    var members = element.members;\r\n    if (members && members.size) {\r\n      let sb = this.sb;\r\n      indent(sb, this.indentLevel++);\r\n      sb.push(\"namespace \");\r\n      sb.push(element.simpleName);\r\n      sb.push(\" {\\n\");\r\n      for (let member of members.values()) this.visitElement(member);\r\n      indent(sb, --this.indentLevel);\r\n      sb.push(\"}\\n\");\r\n    }\r\n  }\r\n\r\n  typeToString(type: Type): string {\r\n    switch (type.kind) {\r\n      case TypeKind.I8: return \"i8\";\r\n      case TypeKind.I16: return \"i16\";\r\n      case TypeKind.I32: return \"i32\";\r\n      case TypeKind.I64: return \"I64\";\r\n      case TypeKind.ISIZE: return this.program.options.isWasm64 ? \"I64\" : \"i32\";\r\n      case TypeKind.U8: return \"u8\";\r\n      case TypeKind.U16: return \"u16\";\r\n      case TypeKind.U32: return \"u32\";\r\n        // ^ TODO: function types\r\n      case TypeKind.U64: return \"U64\";\r\n      case TypeKind.USIZE: return this.program.options.isWasm64 ? \"U64\" : \"u32\";\r\n        // ^ TODO: class types\r\n      case TypeKind.BOOL: return \"bool\";\r\n      case TypeKind.F32: return \"f32\";\r\n      case TypeKind.F64: return \"f64\";\r\n      case TypeKind.VOID: return \"void\";\r\n      default: {\r\n        assert(false);\r\n        return \"\";\r\n      }\r\n    }\r\n  }\r\n\r\n  build(): string {\r\n    var sb = this.sb;\r\n    sb.push(\"declare module ASModule {\\n\");\r\n    sb.push(\"  type i8 = number;\\n\");\r\n    sb.push(\"  type i16 = number;\\n\");\r\n    sb.push(\"  type i32 = number;\\n\");\r\n    sb.push(\"  type u8 = number;\\n\");\r\n    sb.push(\"  type u16 = number;\\n\");\r\n    sb.push(\"  type u32 = number;\\n\");\r\n    sb.push(\"  type f32 = number;\\n\");\r\n    sb.push(\"  type f64 = number;\\n\");\r\n    sb.push(\"  type bool = any;\\n\");\r\n    ++this.indentLevel;\r\n    this.walk();\r\n    --this.indentLevel;\r\n    sb.push(\"}\\n\");\r\n    sb.push(\"export default ASModule;\\n\");\r\n    return this.sb.join(\"\");\r\n  }\r\n}\r\n\r\n// helpers\r\n\r\n/** Tests if a namespace-like element has at least one compiled member. */\r\nfunction hasCompiledMember(element: Element): bool {\r\n  var members = element.members;\r\n  if (members) {\r\n    for (let member of members.values()) {\r\n      switch (member.kind) {\r\n        case ElementKind.FUNCTION_PROTOTYPE: {\r\n          for (let instance of (<FunctionPrototype>member).instances.values()) {\r\n            if (instance.is(CommonFlags.COMPILED)) return true;\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.CLASS_PROTOTYPE: {\r\n          for (let instance of (<ClassPrototype>member).instances.values()) {\r\n            if (instance.is(CommonFlags.COMPILED)) return true;\r\n          }\r\n          break;\r\n        }\r\n        default: {\r\n          if (member.is(CommonFlags.COMPILED) || hasCompiledMember(member)) return true;\r\n          break;\r\n        }\r\n      }\r\n    }\r\n  }\r\n  return false;\r\n}\r\n","/**\r\n * A TypeScript parser for the AssemblyScript subset.\r\n * @module parser\r\n *//***/\r\n\r\nimport {\r\n  CommonFlags,\r\n  LIBRARY_PREFIX,\r\n  PATH_DELIMITER\r\n} from \"./common\";\r\n\r\nimport {\r\n  Program\r\n} from \"./program\";\r\n\r\nimport {\r\n  Tokenizer,\r\n  Token,\r\n  Range,\r\n  CommentHandler,\r\n  IdentifierHandling\r\n} from \"./tokenizer\";\r\n\r\nimport {\r\n  DiagnosticCode,\r\n  DiagnosticEmitter\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  normalizePath\r\n} from \"./util\";\r\n\r\nimport {\r\n  Node,\r\n  NodeKind,\r\n  Source,\r\n  SourceKind,\r\n  CommonTypeNode,\r\n  TypeNode,\r\n  SignatureNode,\r\n\r\n  Expression,\r\n  AssertionKind,\r\n  CallExpression,\r\n  ClassExpression,\r\n  FunctionExpression,\r\n  IdentifierExpression,\r\n  StringLiteralExpression,\r\n\r\n  Statement,\r\n  BlockStatement,\r\n  BreakStatement,\r\n  ClassDeclaration,\r\n  ContinueStatement,\r\n  DeclarationStatement,\r\n  DecoratorNode,\r\n  DoStatement,\r\n  EnumDeclaration,\r\n  EnumValueDeclaration,\r\n  ExportImportStatement,\r\n  ExportMember,\r\n  ExportStatement,\r\n  ExpressionStatement,\r\n  ForStatement,\r\n  FunctionDeclaration,\r\n  IfStatement,\r\n  ImportDeclaration,\r\n  ImportStatement,\r\n  NamespaceDeclaration,\r\n  ParameterNode,\r\n  ParameterKind,\r\n  ReturnStatement,\r\n  SwitchCase,\r\n  SwitchStatement,\r\n  ThrowStatement,\r\n  TryStatement,\r\n  TypeDeclaration,\r\n  TypeParameterNode,\r\n  VariableStatement,\r\n  VariableDeclaration,\r\n  VoidStatement,\r\n  WhileStatement,\r\n\r\n  mangleInternalPath,\r\n  nodeIsCallable,\r\n  nodeIsGenericCallable\r\n} from \"./ast\";\r\n\r\n/** Parser interface. */\r\nexport class Parser extends DiagnosticEmitter {\r\n\r\n  /** Program being created. */\r\n  program: Program;\r\n  /** Source file names to be requested next. */\r\n  backlog: string[] = new Array();\r\n  /** Source file names already seen, that is processed or backlogged. */\r\n  seenlog: Set<string> = new Set();\r\n  /** Source file names already completely processed. */\r\n  donelog: Set<string> = new Set();\r\n  /** Optional handler to intercept comments while tokenizing. */\r\n  onComment: CommentHandler | null = null;\r\n\r\n  /** Constructs a new parser. */\r\n  constructor() {\r\n    super();\r\n    this.program = new Program(this.diagnostics);\r\n  }\r\n\r\n  /** Parses a file and adds its definitions to the program. */\r\n  parseFile(\r\n    text: string,\r\n    path: string,\r\n    isEntry: bool\r\n  ): void {\r\n    var normalizedPath = normalizePath(path);\r\n    var internalPath = mangleInternalPath(normalizedPath);\r\n\r\n    // check if already processed\r\n    if (this.donelog.has(internalPath)) return;\r\n    this.donelog.add(internalPath); // do not parse again\r\n    this.seenlog.add(internalPath); // do not request again\r\n\r\n    // create the source element\r\n    var source = new Source(\r\n      normalizedPath,\r\n      text,\r\n      isEntry\r\n        ? SourceKind.ENTRY\r\n        : path.startsWith(LIBRARY_PREFIX) && path.indexOf(PATH_DELIMITER, LIBRARY_PREFIX.length) < 0\r\n          ? SourceKind.LIBRARY\r\n          : SourceKind.DEFAULT\r\n    );\r\n    var program = this.program;\r\n    program.sources.push(source);\r\n\r\n    // tokenize and parse\r\n    var tn = new Tokenizer(source, program.diagnostics);\r\n    tn.onComment = this.onComment;\r\n    source.tokenizer = tn;\r\n    var statements = source.statements;\r\n    while (!tn.skip(Token.ENDOFFILE)) {\r\n      let statement = this.parseTopLevelStatement(tn);\r\n      if (statement) {\r\n        statement.parent = source;\r\n        statements.push(statement);\r\n      }\r\n    }\r\n    tn.finish();\r\n  }\r\n\r\n  /** Parses a top-level statement. */\r\n  parseTopLevelStatement(\r\n    tn: Tokenizer,\r\n    namespace: Node | null = null\r\n  ): Statement | null {\r\n    var flags = CommonFlags.NONE;\r\n    var startPos: i32 = -1;\r\n\r\n    // check decorators\r\n    var decorators: DecoratorNode[] | null = null;\r\n    while (tn.skip(Token.AT)) {\r\n      if (startPos < 0) startPos = tn.tokenPos;\r\n      let decorator = this.parseDecorator(tn);\r\n      if (!decorator) {\r\n        this.skipStatement(tn);\r\n        continue;\r\n      }\r\n      if (!decorators) decorators = [];\r\n      decorators.push(decorator);\r\n    }\r\n\r\n    // check modifiers\r\n    var exportStart: i32 = 0;\r\n    var exportEnd: i32 = 0;\r\n    if (tn.skip(Token.EXPORT)) {\r\n      if (tn.skip(Token.DEFAULT)) {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          tn.range()\r\n        );\r\n      }\r\n      if (startPos < 0) startPos = tn.tokenPos;\r\n      flags |= CommonFlags.EXPORT;\r\n      exportStart = tn.tokenPos;\r\n      exportEnd = tn.pos;\r\n    }\r\n\r\n    var declareStart: i32 = 0;\r\n    var declareEnd: i32 = 0;\r\n    var contextIsAmbient = namespace != null && namespace.is(CommonFlags.AMBIENT);\r\n    if (tn.skip(Token.DECLARE)) {\r\n      if (startPos < 0) startPos = tn.tokenPos;\r\n      if (contextIsAmbient) {\r\n        this.error(\r\n          DiagnosticCode.A_declare_modifier_cannot_be_used_in_an_already_ambient_context,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n      flags |= CommonFlags.DECLARE | CommonFlags.AMBIENT;\r\n    } else if (contextIsAmbient) {\r\n      flags |= CommonFlags.AMBIENT;\r\n    }\r\n\r\n    // parse the statement\r\n    var statement: Statement | null = null;\r\n\r\n    // handle declarations\r\n    var first = tn.peek();\r\n    if (startPos < 0) startPos = tn.nextTokenPos;\r\n    switch (first) {\r\n      case Token.CONST: {\r\n        tn.next();\r\n        flags |= CommonFlags.CONST;\r\n        if (tn.skip(Token.ENUM)) {\r\n          statement = this.parseEnum(tn, flags, decorators, startPos);\r\n          break;\r\n        } else {\r\n          statement = this.parseVariable(tn, flags, decorators, startPos);\r\n          decorators = null;\r\n        }\r\n        break;\r\n      }\r\n      case Token.LET: flags |= CommonFlags.LET;\r\n      case Token.VAR: {\r\n        tn.next();\r\n        statement = this.parseVariable(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.ENUM: {\r\n        tn.next();\r\n        statement = this.parseEnum(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.FUNCTION: {\r\n        tn.next();\r\n        statement = this.parseFunction(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.ABSTRACT: {\r\n        let state = tn.mark();\r\n        tn.next();\r\n        if (!tn.skip(Token.CLASS)) {\r\n          tn.reset(state);\r\n          statement = this.parseStatement(tn, true);\r\n          break;\r\n        } else {\r\n          tn.discard(state);\r\n        }\r\n        flags |= CommonFlags.ABSTRACT;\r\n        // fall through\r\n      }\r\n      case Token.CLASS:\r\n      case Token.INTERFACE: {\r\n        tn.next();\r\n        statement = this.parseClassOrInterface(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.NAMESPACE: {\r\n        let state = tn.mark();\r\n        tn.next();\r\n        if (tn.peek(false, IdentifierHandling.PREFER) == Token.IDENTIFIER) {\r\n          tn.discard(state);\r\n          statement = this.parseNamespace(tn, flags, decorators, startPos);\r\n          decorators = null;\r\n        } else {\r\n          tn.reset(state);\r\n          statement = this.parseStatement(tn, true);\r\n        }\r\n        break;\r\n      }\r\n      case Token.IMPORT: {\r\n        tn.next();\r\n        flags |= CommonFlags.IMPORT;\r\n        if (flags & CommonFlags.EXPORT) {\r\n          statement = this.parseExportImport(tn, startPos);\r\n        } else {\r\n          statement = this.parseImport(tn);\r\n        }\r\n        break;\r\n      }\r\n      case Token.TYPE: { // also identifier\r\n        let state = tn.mark();\r\n        tn.next();\r\n        if (tn.peek(false, IdentifierHandling.PREFER) == Token.IDENTIFIER) {\r\n          tn.discard(state);\r\n          statement = this.parseTypeDeclaration(tn, flags, decorators, startPos);\r\n          decorators = null;\r\n        } else {\r\n          tn.reset(state);\r\n          statement = this.parseStatement(tn, true);\r\n        }\r\n        break;\r\n      }\r\n      default: {\r\n\r\n        // handle plain exports\r\n        if (flags & CommonFlags.EXPORT) {\r\n          statement = this.parseExport(tn, flags, startPos);\r\n\r\n        // handle non-declaration statements\r\n        } else {\r\n          if (exportEnd) {\r\n            this.error(\r\n              DiagnosticCode._0_modifier_cannot_be_used_here,\r\n              tn.range(exportStart, exportEnd), \"export\"\r\n            ); // recoverable\r\n          }\r\n          if (declareEnd) {\r\n            this.error(\r\n              DiagnosticCode._0_modifier_cannot_be_used_here,\r\n              tn.range(declareStart, declareEnd), \"declare\"\r\n            ); // recoverable\r\n          }\r\n          if (!namespace) {\r\n            statement = this.parseStatement(tn, true);\r\n          } // TODO: else?\r\n        }\r\n        break;\r\n      }\r\n    }\r\n\r\n    // check for decorators that weren't consumed\r\n    if (decorators) {\r\n      for (let i = 0, k = decorators.length; i < k; ++i) {\r\n        this.error(\r\n          DiagnosticCode.Decorators_are_not_valid_here,\r\n          decorators[i].range\r\n        );\r\n      }\r\n    }\r\n    return statement;\r\n  }\r\n\r\n  /** Obtains the next file to parse. */\r\n  nextFile(): string | null {\r\n    var backlog = this.backlog;\r\n    return backlog.length ? backlog.shift() : null;\r\n  }\r\n\r\n  /** Finishes parsing and returns the program. */\r\n  finish(): Program {\r\n    if (this.backlog.length) throw new Error(\"backlog is not empty\");\r\n    this.backlog = [];\r\n    this.seenlog.clear();\r\n    this.donelog.clear();\r\n    return this.program;\r\n  }\r\n\r\n  /** Parses a type. */\r\n  parseType(\r\n    tn: Tokenizer,\r\n    acceptParenthesized: bool = true,\r\n    suppressErrors: bool = false\r\n  ): CommonTypeNode | null {\r\n\r\n    // NOTE: this parses our limited subset\r\n    var token = tn.next();\r\n    var startPos = tn.tokenPos;\r\n\r\n    var type: CommonTypeNode;\r\n\r\n    // '(' ...\r\n    if (token == Token.OPENPAREN) {\r\n\r\n      // '(' FunctionSignature ')' '|' 'null'?\r\n      let isNullableSignature = tn.skip(Token.OPENPAREN);\r\n      // FunctionSignature?\r\n      let signature = this.tryParseSignature(tn);\r\n      if (signature) {\r\n        if (isNullableSignature) {\r\n          if (!tn.skip(Token.CLOSEPAREN)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \")\"\r\n            );\r\n            return null;\r\n          }\r\n          if (!tn.skip(Token.BAR)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"|\"\r\n            );\r\n            return null;\r\n          }\r\n          if (!tn.skip(Token.NULL)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"null\"\r\n            );\r\n          }\r\n          signature.isNullable = true;\r\n        }\r\n        return signature;\r\n      } else if (isNullableSignature || this.tryParseSignatureIsSignature) {\r\n        this.error(\r\n          DiagnosticCode.Unexpected_token,\r\n          tn.range()\r\n        );\r\n        return null;\r\n      }\r\n\r\n      // Type (',' Type)* ')'\r\n      if (acceptParenthesized) {\r\n        let innerType = this.parseType(tn, false, suppressErrors);\r\n        if (!innerType) return null;\r\n        if (!tn.skip(Token.CLOSEPAREN)) {\r\n          if (!suppressErrors) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(tn.pos), \"}\"\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n        type = innerType;\r\n        type.range.start = startPos;\r\n        type.range.end = tn.pos;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Unexpected_token,\r\n          tn.range()\r\n        );\r\n        return null;\r\n      }\r\n\r\n    // 'void'\r\n    } else if (token == Token.VOID) {\r\n      type = Node.createType(\r\n        Node.createIdentifierExpression(\"void\", tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n\r\n    // 'this'\r\n    } else if (token == Token.THIS) {\r\n      type = Node.createType(\r\n        Node.createThisExpression(tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n\r\n    // 'true'\r\n    } else if (token == Token.TRUE || token == Token.FALSE) {\r\n      type = Node.createType(\r\n        Node.createIdentifierExpression(\"bool\", tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n\r\n    // StringLiteral\r\n    } else if (token == Token.STRINGLITERAL) {\r\n      tn.readString();\r\n      type = Node.createType(\r\n        Node.createIdentifierExpression(\"string\", tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n\r\n    // Identifier\r\n    } else if (token == Token.IDENTIFIER) {\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let parameters = new Array<TypeNode>();\r\n      let nullable = false;\r\n\r\n      // Name<T>\r\n      if (tn.skip(Token.LESSTHAN)) {\r\n        do {\r\n          let parameter = this.parseType(tn, true, suppressErrors);\r\n          if (!parameter) return null;\r\n          parameters.push(<TypeNode>parameter);\r\n        } while (tn.skip(Token.COMMA));\r\n        if (!tn.skip(Token.GREATERTHAN)) {\r\n          if (!suppressErrors) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(tn.pos), \">\"\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n      }\r\n      // ... | null\r\n      if (tn.skip(Token.BAR)) {\r\n        if (tn.skip(Token.NULL)) {\r\n          nullable = true;\r\n        } else {\r\n          if (!suppressErrors) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(tn.pos), \"null\"\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n      }\r\n      type = Node.createType(identifier, parameters, nullable, tn.range(startPos, tn.pos));\r\n\r\n    } else {\r\n      if (!suppressErrors) {\r\n        this.error(\r\n          DiagnosticCode.Identifier_expected,\r\n          tn.range()\r\n        );\r\n      }\r\n      return null;\r\n    }\r\n    // ... [][]\r\n    while (tn.skip(Token.OPENBRACKET)) {\r\n      let bracketStart = tn.tokenPos;\r\n      if (!tn.skip(Token.CLOSEBRACKET)) {\r\n        if (!suppressErrors) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"]\"\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n      let bracketRange = tn.range(bracketStart, tn.pos);\r\n\r\n      // ...[] | null\r\n      let nullable = false;\r\n      if (tn.skip(Token.BAR)) {\r\n        if (tn.skip(Token.NULL)) {\r\n          nullable = true;\r\n        } else {\r\n          if (!suppressErrors) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"null\"\r\n            );\r\n          }\r\n          return null;\r\n        }\r\n      }\r\n      type = Node.createType(\r\n        Node.createIdentifierExpression(\"Array\", bracketRange),\r\n        [ type ],\r\n        nullable,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n      if (nullable) break;\r\n    }\r\n\r\n    return type;\r\n  }\r\n\r\n  // Indicates whether tryParseSignature determined that it is handling a Signature\r\n  private tryParseSignatureIsSignature: bool = false;\r\n\r\n  /** Parses a function signature, as used in type declarations. */\r\n  tryParseSignature(\r\n    tn: Tokenizer\r\n  ): SignatureNode | null {\r\n\r\n    // at '(': ('...'? Identifier '?'? ':' Type (','  '...'? Identifier '?'? ':' Type)* )? ')' '=>' Type\r\n\r\n    var state = tn.mark();\r\n    var startPos = tn.tokenPos;\r\n    var parameters: ParameterNode[] | null = null;\r\n    var thisType: TypeNode | null = null;\r\n    var isSignature: bool = false;\r\n\r\n    if (tn.skip(Token.CLOSEPAREN)) {\r\n      isSignature = true;\r\n      tn.discard(state);\r\n      parameters = [];\r\n\r\n    } else {\r\n      isSignature = false; // not yet known\r\n      do {\r\n        let kind = ParameterKind.DEFAULT;\r\n        if (tn.skip(Token.DOT_DOT_DOT)) {\r\n          isSignature = true;\r\n          tn.discard(state);\r\n          kind = ParameterKind.REST;\r\n        }\r\n        if (tn.skip(Token.THIS)) {\r\n          if (tn.skip(Token.COLON)) {\r\n            isSignature = true;\r\n            tn.discard(state);\r\n            let t = this.parseType(tn, false);\r\n            if (!t) return null;\r\n            if (t.kind != NodeKind.TYPE) {\r\n              this.error(\r\n                DiagnosticCode.Operation_not_supported,\r\n                t.range\r\n              );\r\n              this.tryParseSignatureIsSignature = true;\r\n              return null;\r\n            }\r\n            thisType = <TypeNode>t;\r\n          } else {\r\n            tn.reset(state);\r\n            this.tryParseSignatureIsSignature = false;\r\n            return null;\r\n          }\r\n        } else if (tn.skipIdentifier()) {\r\n          let name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range(tn.tokenPos, tn.pos));\r\n          if (tn.skip(Token.QUESTION)) {\r\n            isSignature = true;\r\n            tn.discard(state);\r\n            if (kind == ParameterKind.REST) {\r\n              this.error(\r\n                DiagnosticCode.A_rest_parameter_cannot_be_optional,\r\n                tn.range()\r\n              ); // recoverable\r\n            } else {\r\n              kind = ParameterKind.OPTIONAL;\r\n            }\r\n          }\r\n          if (tn.skip(Token.COLON)) {\r\n            isSignature = true;\r\n            tn.discard(state);\r\n            let type = this.parseType(tn); // not suppressing errors because known\r\n            if (!type) {\r\n              this.tryParseSignatureIsSignature = isSignature;\r\n              return null;\r\n            }\r\n            let param = new ParameterNode();\r\n            param.parameterKind = kind;\r\n            param.name = name;\r\n            param.type = type;\r\n            if (!parameters) parameters = [ param ];\r\n            else parameters.push(param);\r\n          } else {\r\n            if (isSignature) {\r\n              this.error(\r\n                DiagnosticCode.Type_expected,\r\n                tn.range()\r\n              ); // recoverable\r\n            }\r\n          }\r\n        } else {\r\n          if (isSignature) {\r\n            this.error(\r\n              DiagnosticCode.Identifier_expected,\r\n              tn.range()\r\n            );\r\n          } else {\r\n            tn.reset(state);\r\n          }\r\n          this.tryParseSignatureIsSignature = isSignature;\r\n          return null;\r\n        }\r\n      } while (tn.skip(Token.COMMA));\r\n      if (!tn.skip(Token.CLOSEPAREN)) {\r\n        if (isSignature) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n        } else {\r\n          tn.reset(state);\r\n        }\r\n        this.tryParseSignatureIsSignature = isSignature;\r\n        return null;\r\n      }\r\n    }\r\n\r\n    var returnType: CommonTypeNode | null;\r\n    if (tn.skip(Token.EQUALS_GREATERTHAN)) {\r\n      isSignature = true;\r\n      tn.discard(state);\r\n      returnType = this.parseType(tn);\r\n      if (!returnType) {\r\n        this.tryParseSignatureIsSignature = isSignature;\r\n        return null;\r\n      }\r\n    } else {\r\n      if (isSignature) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"=>\"\r\n        );\r\n      } else {\r\n        tn.reset(state);\r\n      }\r\n      this.tryParseSignatureIsSignature = isSignature;\r\n      return null;\r\n    }\r\n    this.tryParseSignatureIsSignature = true;\r\n    return Node.createSignature(\r\n      parameters || [],\r\n      returnType,\r\n      thisType,\r\n      false,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n  }\r\n\r\n  // statements\r\n\r\n  parseDecorator(\r\n    tn: Tokenizer\r\n  ): DecoratorNode | null {\r\n\r\n    // at '@': Identifier ('.' Identifier)* '(' Arguments\r\n\r\n    var startPos = tn.tokenPos;\r\n    if (tn.skipIdentifier()) {\r\n      let name = tn.readIdentifier();\r\n      let expression: Expression = Node.createIdentifierExpression(name, tn.range(startPos, tn.pos));\r\n      while (tn.skip(Token.DOT)) {\r\n        if (tn.skipIdentifier()) {\r\n          name = tn.readIdentifier();\r\n          expression = Node.createPropertyAccessExpression(\r\n            expression,\r\n            Node.createIdentifierExpression(name, tn.range()),\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n      let args: Expression[] | null;\r\n      if (tn.skip(Token.OPENPAREN)) {\r\n        args = this.parseArguments(tn);\r\n        if (args) {\r\n          return Node.createDecorator(expression, args, tn.range(startPos, tn.pos));\r\n        }\r\n      } else {\r\n        return Node.createDecorator(expression, null, tn.range(startPos, tn.pos));\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseVariable(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): VariableStatement | null {\r\n\r\n    // at ('const' | 'let' | 'var'): VariableDeclaration (',' VariableDeclaration)* ';'?\r\n\r\n    var members = new Array<VariableDeclaration>();\r\n    do {\r\n      let member = this.parseVariableDeclaration(tn, flags, decorators);\r\n      if (!member) return null;\r\n      members.push(<VariableDeclaration>member);\r\n    } while (tn.skip(Token.COMMA));\r\n\r\n    var ret = Node.createVariableStatement(members, decorators, flags, tn.range(startPos, tn.pos));\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseVariableDeclaration(\r\n    tn: Tokenizer,\r\n    parentFlags: CommonFlags,\r\n    parentDecorators: DecoratorNode[] | null\r\n  ): VariableDeclaration | null {\r\n\r\n    // before: Identifier (':' Type)? ('=' Expression)?\r\n\r\n    if (!tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n    var identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    var flags = parentFlags;\r\n\r\n    var type: CommonTypeNode | null = null;\r\n    if (tn.skip(Token.COLON)) {\r\n      type = this.parseType(tn);\r\n    }\r\n\r\n    var initializer: Expression | null = null;\r\n    if (tn.skip(Token.EQUALS)) {\r\n      if (flags & CommonFlags.AMBIENT) {\r\n        this.error(\r\n          DiagnosticCode.Initializers_are_not_allowed_in_ambient_contexts,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n      initializer = this.parseExpression(tn, Precedence.COMMA + 1);\r\n      if (!initializer) return null;\r\n    } else {\r\n      if (flags & CommonFlags.CONST) {\r\n        if (!(flags & CommonFlags.AMBIENT)) {\r\n          this.error(\r\n            DiagnosticCode._const_declarations_must_be_initialized,\r\n            identifier.range\r\n          ); // recoverable\r\n        }\r\n      } else if (!type) { // neither type nor initializer\r\n        this.error(\r\n          DiagnosticCode.Type_expected,\r\n          tn.range(tn.pos)\r\n        ); // recoverable\r\n      }\r\n    }\r\n    return Node.createVariableDeclaration(\r\n      identifier,\r\n      type,\r\n      initializer,\r\n      parentDecorators,\r\n      flags,\r\n      Range.join(identifier.range, tn.range())\r\n    );\r\n  }\r\n\r\n  parseEnum(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): EnumDeclaration | null {\r\n\r\n    // at 'enum': Identifier '{' (EnumValueDeclaration (',' EnumValueDeclaration )*)? '}' ';'?\r\n\r\n    if (tn.next() != Token.IDENTIFIER) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n    var identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    if (tn.next() != Token.OPENBRACE) {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"{\"\r\n      );\r\n      return null;\r\n    }\r\n    var members = new Array<EnumValueDeclaration>();\r\n    while (!tn.skip(Token.CLOSEBRACE)) {\r\n      let member = this.parseEnumValue(tn, CommonFlags.NONE);\r\n      if (!member) return null;\r\n      members.push(<EnumValueDeclaration>member);\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.CLOSEBRACE)) {\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"}\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n    var ret = Node.createEnumDeclaration(\r\n      identifier,\r\n      members,\r\n      decorators,\r\n      flags,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseEnumValue(\r\n    tn: Tokenizer,\r\n    parentFlags: CommonFlags\r\n  ): EnumValueDeclaration | null {\r\n\r\n    // before: Identifier ('=' Expression)?\r\n\r\n    if (!tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n    var identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    var value: Expression | null = null;\r\n    if (tn.skip(Token.EQUALS)) {\r\n      value = this.parseExpression(tn, Precedence.COMMA + 1);\r\n      if (!value) return null;\r\n    }\r\n    return Node.createEnumValueDeclaration(\r\n      identifier,\r\n      value,\r\n      parentFlags,\r\n      Range.join(identifier.range, tn.range())\r\n    );\r\n  }\r\n\r\n  parseReturn(\r\n    tn: Tokenizer\r\n  ): ReturnStatement | null {\r\n\r\n    // at 'return': Expression | (';' | '}' | ...'\\n')\r\n\r\n    var expr: Expression | null = null;\r\n    if (\r\n      tn.peek(true) != Token.SEMICOLON &&\r\n      tn.nextToken != Token.CLOSEBRACE &&\r\n      !tn.nextTokenOnNewLine\r\n    ) {\r\n      if (!(expr = this.parseExpression(tn))) return null;\r\n    }\r\n\r\n    var ret = Node.createReturnStatement(expr, tn.range());\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseTypeParameters(\r\n    tn: Tokenizer\r\n  ): TypeParameterNode[] | null {\r\n\r\n    // at '<': TypeParameter (',' TypeParameter)* '>'\r\n\r\n    var typeParameters = new Array<TypeParameterNode>();\r\n    while (!tn.skip(Token.GREATERTHAN)) {\r\n      let typeParameter = this.parseTypeParameter(tn);\r\n      if (!typeParameter) return null;\r\n      typeParameters.push(<TypeParameterNode>typeParameter);\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.GREATERTHAN)) {\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \">\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n    if (typeParameters.length === 0) {\r\n      this.error(\r\n        DiagnosticCode.Type_parameter_list_cannot_be_empty,\r\n        tn.range()\r\n      ); // recoverable\r\n    }\r\n    return typeParameters;\r\n  }\r\n\r\n  parseTypeParameter(\r\n    tn: Tokenizer\r\n  ): TypeParameterNode | null {\r\n\r\n    // before: Identifier ('extends' Type)?\r\n\r\n    if (tn.next() == Token.IDENTIFIER) {\r\n      let identifier = Node.createIdentifierExpression(\r\n        tn.readIdentifier(),\r\n        tn.range()\r\n      );\r\n      let extendsType: TypeNode | null = null;\r\n      if (tn.skip(Token.EXTENDS)) {\r\n        let t = this.parseType(tn);\r\n        if (!t) return null;\r\n        if (t.kind != NodeKind.TYPE) {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            t.range\r\n          );\r\n          return null;\r\n        }\r\n        extendsType = <TypeNode>t;\r\n      }\r\n      return Node.createTypeParameter(\r\n        identifier,\r\n        extendsType,\r\n        Range.join(identifier.range, tn.range())\r\n      );\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  private parseParametersThis: TypeNode | null = null;\r\n\r\n  parseParameters(\r\n    tn: Tokenizer,\r\n    isConstructor: bool = false\r\n  ): ParameterNode[] | null {\r\n\r\n    // at '(': (Parameter (',' Parameter)*)? ')'\r\n\r\n    var parameters = new Array<ParameterNode>();\r\n    var seenRest: ParameterNode | null = null;\r\n    var seenOptional = false;\r\n    var reportedRest = false;\r\n    var thisType: CommonTypeNode | null = null;\r\n\r\n    // check if there is a leading `this` parameter\r\n    this.parseParametersThis = null;\r\n    if (tn.skip(Token.THIS)) {\r\n      if (tn.skip(Token.COLON)) {\r\n        thisType = this.parseType(tn); // reports\r\n        if (!thisType) return null;\r\n        if (thisType.kind == NodeKind.TYPE) {\r\n          this.parseParametersThis = <TypeNode>thisType;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            thisType.range\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \":\"\r\n        );\r\n        return null;\r\n      }\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.CLOSEPAREN)) {\r\n          return parameters;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n\r\n    while (!tn.skip(Token.CLOSEPAREN)) {\r\n      let param = this.parseParameter(tn, isConstructor); // reports\r\n      if (!param) return null;\r\n      if (seenRest && !reportedRest) {\r\n        this.error(\r\n          DiagnosticCode.A_rest_parameter_must_be_last_in_a_parameter_list,\r\n          seenRest.name.range\r\n        );\r\n        reportedRest = true;\r\n      }\r\n      switch (param.parameterKind) {\r\n        default: {\r\n          if (seenOptional) {\r\n            this.error(\r\n              DiagnosticCode.A_required_parameter_cannot_follow_an_optional_parameter,\r\n              param.name.range\r\n            );\r\n          }\r\n          break;\r\n        }\r\n        case ParameterKind.OPTIONAL: {\r\n          seenOptional = true;\r\n          break;\r\n        }\r\n        case ParameterKind.REST: {\r\n          seenRest = param;\r\n          break;\r\n        }\r\n      }\r\n      parameters.push(param);\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.CLOSEPAREN)) {\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n    return parameters;\r\n  }\r\n\r\n  parseParameter(\r\n    tn: Tokenizer,\r\n    isConstructor: bool = false\r\n  ): ParameterNode | null {\r\n\r\n    // before: ('public' | 'private' | 'protected' | '...')? Identifier '?'? (':' Type)? ('=' Expression)?\r\n\r\n    var isRest = false;\r\n    var isOptional = false;\r\n    var startRange: Range | null = null;\r\n    var accessFlags: CommonFlags = CommonFlags.NONE;\r\n    if (isConstructor) {\r\n      if (tn.skip(Token.PUBLIC)) {\r\n        startRange = tn.range();\r\n        accessFlags |= CommonFlags.PUBLIC;\r\n      } else if (tn.skip(Token.PROTECTED)) {\r\n        startRange = tn.range();\r\n        accessFlags |= CommonFlags.PROTECTED;\r\n      } else if (tn.skip(Token.PRIVATE)) {\r\n        startRange = tn.range();\r\n        accessFlags |= CommonFlags.PRIVATE;\r\n      }\r\n      if (tn.peek() == Token.READONLY) {\r\n        let state = tn.mark();\r\n        tn.next();\r\n        if (tn.peek() != Token.COLON) { // modifier\r\n          tn.discard(state);\r\n          if (!startRange) startRange = tn.range();\r\n          accessFlags |= CommonFlags.READONLY;\r\n        } else { // identifier\r\n          tn.reset(state);\r\n        }\r\n      }\r\n    }\r\n    if (tn.skip(Token.DOT_DOT_DOT)) {\r\n      if (accessFlags) {\r\n        this.error(\r\n          DiagnosticCode.A_parameter_property_cannot_be_declared_using_a_rest_parameter,\r\n          tn.range()\r\n        );\r\n      } else {\r\n        startRange = tn.range();\r\n      }\r\n      isRest = true;\r\n    }\r\n    if (tn.skipIdentifier()) {\r\n      if (!isRest) startRange = tn.range();\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let type: CommonTypeNode | null = null;\r\n      if (isOptional = tn.skip(Token.QUESTION)) {\r\n        if (isRest) {\r\n          this.error(\r\n            DiagnosticCode.A_rest_parameter_cannot_be_optional,\r\n            identifier.range\r\n          );\r\n        }\r\n      }\r\n      if (tn.skip(Token.COLON)) {\r\n        type = this.parseType(tn);\r\n        if (!type) return null;\r\n      } else {\r\n        type = Node.createOmittedType(tn.range(tn.pos));\r\n      }\r\n      let initializer: Expression | null = null;\r\n      if (tn.skip(Token.EQUALS)) {\r\n        if (isRest) {\r\n          this.error(\r\n            DiagnosticCode.A_rest_parameter_cannot_have_an_initializer,\r\n            identifier.range\r\n          );\r\n        }\r\n        if (isOptional) {\r\n          this.error(\r\n            DiagnosticCode.Parameter_cannot_have_question_mark_and_initializer,\r\n            identifier.range\r\n          );\r\n        } else {\r\n          isOptional = true;\r\n        }\r\n        initializer = this.parseExpression(tn, Precedence.COMMA + 1);\r\n        if (!initializer) return null;\r\n      }\r\n      let param = Node.createParameter(\r\n        identifier,\r\n        type,\r\n        initializer,\r\n        isRest\r\n          ? ParameterKind.REST\r\n          : isOptional\r\n            ? ParameterKind.OPTIONAL\r\n            : ParameterKind.DEFAULT,\r\n        Range.join(<Range>startRange, tn.range())\r\n      );\r\n      param.flags |= accessFlags;\r\n      return param;\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseFunction(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): FunctionDeclaration | null {\r\n\r\n    // at 'function':\r\n    //  Identifier\r\n    //  ('<' TypeParameters)?\r\n    //  '(' Parameters (':' Type)?\r\n    //  '{' Statement* '}'\r\n    //  ';'?\r\n\r\n    if (!tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range(tn.pos)\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    var signatureStart: i32 = -1;\r\n\r\n    var typeParameters: TypeParameterNode[] | null = null;\r\n    if (tn.skip(Token.LESSTHAN)) {\r\n      signatureStart = tn.tokenPos;\r\n      typeParameters = this.parseTypeParameters(tn);\r\n      if (!typeParameters) return null;\r\n      flags |= CommonFlags.GENERIC;\r\n    }\r\n\r\n    if (!tn.skip(Token.OPENPAREN)) {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(tn.pos), \"(\"\r\n      );\r\n      return null;\r\n    }\r\n\r\n    if (signatureStart < 0) {\r\n      signatureStart = tn.tokenPos;\r\n    }\r\n\r\n    var parameters = this.parseParameters(tn);\r\n    if (!parameters) return null;\r\n    var thisType = this.parseParametersThis;\r\n\r\n    var isSetter = (flags & CommonFlags.SET) != 0;\r\n    if (isSetter) {\r\n      if (parameters.length != 1) {\r\n        this.error(\r\n          DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,\r\n          name.range\r\n        ); // recoverable\r\n      }\r\n      if (parameters.length && parameters[0].initializer) {\r\n        this.error(\r\n          DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,\r\n          name.range\r\n        ); // recoverable\r\n      }\r\n    }\r\n\r\n    if (flags & CommonFlags.GET) {\r\n      if (parameters.length) {\r\n        this.error(\r\n          DiagnosticCode.A_get_accessor_cannot_have_parameters,\r\n          name.range\r\n        ); // recoverable\r\n      }\r\n    }\r\n\r\n    var returnType: CommonTypeNode | null = null;\r\n    if (tn.skip(Token.COLON)) {\r\n      returnType = this.parseType(tn, true, isSetter);\r\n      if (!returnType) return null;\r\n    }\r\n\r\n    if (!returnType) {\r\n      returnType = Node.createOmittedType(\r\n        tn.range(tn.pos)\r\n      );\r\n      if (!isSetter) {\r\n        this.error(\r\n          DiagnosticCode.Type_expected,\r\n          returnType.range\r\n        ); // recoverable\r\n      }\r\n    }\r\n\r\n    var signature = Node.createSignature(\r\n      parameters,\r\n      returnType,\r\n      thisType,\r\n      false,\r\n      tn.range(signatureStart, tn.pos)\r\n    );\r\n\r\n    var body: Statement | null = null;\r\n    if (tn.skip(Token.OPENBRACE)) {\r\n      if (flags & CommonFlags.AMBIENT) {\r\n        this.error(\r\n          DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n\r\n      body = this.parseBlockStatement(tn, false);\r\n      if (!body) return null;\r\n    } else if (!(flags & CommonFlags.AMBIENT)) {\r\n      this.error(\r\n        DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,\r\n        tn.range(tn.pos)\r\n      );\r\n    }\r\n\r\n    var ret = Node.createFunctionDeclaration(\r\n      name,\r\n      typeParameters,\r\n      signature,\r\n      body,\r\n      decorators,\r\n      flags,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseFunctionExpression(tn: Tokenizer): FunctionExpression | null {\r\n    var startPos = tn.tokenPos;\r\n    var name: IdentifierExpression;\r\n    var isArrow = false;\r\n\r\n    // either at 'function':\r\n    //  Identifier?\r\n    //  '(' Parameters (':' Type)?\r\n    //  Statement\r\n\r\n    if (tn.token == Token.FUNCTION) {\r\n      if (tn.skipIdentifier()) {\r\n        name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      } else { // empty name\r\n        name = Node.createEmptyIdentifierExpression(tn.range(tn.pos));\r\n      }\r\n      if (!tn.skip(Token.OPENPAREN)) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(tn.pos), \"(\"\r\n        );\r\n        return null;\r\n      }\r\n\r\n    // or at '(' of arrow function:\r\n    //  Parameters (':' Type)?\r\n    //  Statement\r\n\r\n    } else {\r\n      isArrow = true;\r\n      assert(tn.token == Token.OPENPAREN);\r\n      name = Node.createEmptyIdentifierExpression(tn.range(tn.tokenPos));\r\n    }\r\n\r\n    // TODO: type parameters? doesn't seem worth it.\r\n\r\n    var signatureStart = tn.pos;\r\n    var parameters = this.parseParameters(tn);\r\n    if (!parameters) return null;\r\n\r\n    return this.parseFunctionExpressionCommon(tn, name, parameters, isArrow, startPos, signatureStart);\r\n  }\r\n\r\n  private parseFunctionExpressionCommon(\r\n    tn: Tokenizer,\r\n    name: IdentifierExpression,\r\n    parameters: ParameterNode[],\r\n    isArrow: bool,\r\n    startPos: i32 = -1,\r\n    signatureStart: i32 = -1\r\n  ): FunctionExpression | null {\r\n    if (startPos < 0) startPos = name.range.start;\r\n    if (signatureStart < 0) signatureStart = startPos;\r\n\r\n    var returnType: CommonTypeNode | null = null;\r\n    if (tn.skip(Token.COLON)) {\r\n      returnType = this.parseType(tn);\r\n      if (!returnType) return null;\r\n    } else {\r\n      returnType = Node.createOmittedType(tn.range(tn.pos));\r\n      this.error(\r\n        DiagnosticCode.Type_expected,\r\n        returnType.range\r\n      ); // recoverable\r\n    }\r\n\r\n    if (isArrow) {\r\n      if (!tn.skip(Token.EQUALS_GREATERTHAN)) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(tn.pos), \"=>\"\r\n        );\r\n        return null;\r\n      }\r\n    }\r\n\r\n    var signature = Node.createSignature(\r\n      parameters,\r\n      returnType,\r\n      null, // TODO?\r\n      false,\r\n      tn.range(signatureStart, tn.pos)\r\n    );\r\n\r\n    var body: Statement | null;\r\n    if (isArrow) {\r\n      body = this.parseStatement(tn, false);\r\n    } else {\r\n      if (!tn.skip(Token.OPENBRACE)) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(tn.pos), \"{\"\r\n        );\r\n        return null;\r\n      }\r\n      body = this.parseBlockStatement(tn, false);\r\n    }\r\n    if (!body) return null;\r\n\r\n    var declaration = Node.createFunctionDeclaration(\r\n      name,\r\n      null,\r\n      signature,\r\n      body,\r\n      null,\r\n      isArrow ? CommonFlags.ARROW : CommonFlags.NONE,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n    return Node.createFunctionExpression(declaration);\r\n  }\r\n\r\n  parseClassOrInterface(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): ClassDeclaration | null {\r\n\r\n    // at ('class' | 'interface'):\r\n    //   Identifier\r\n    //   ('<' TypeParameters)?\r\n    //   ('extends' Type)?\r\n    //   ('implements' Type (',' Type)*)?\r\n    //   '{' ClassMember* '}'\r\n\r\n    var isInterface = tn.token == Token.INTERFACE;\r\n\r\n    if (!tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var identifier = Node.createIdentifierExpression(\r\n      tn.readIdentifier(),\r\n      tn.range()\r\n    );\r\n\r\n    var typeParameters: TypeParameterNode[] | null;\r\n    if (tn.skip(Token.LESSTHAN)) {\r\n      typeParameters = this.parseTypeParameters(tn);\r\n      if (!typeParameters) return null;\r\n      flags |= CommonFlags.GENERIC;\r\n    } else {\r\n      typeParameters = [];\r\n    }\r\n\r\n    var extendsType: TypeNode | null = null;\r\n    if (tn.skip(Token.EXTENDS)) {\r\n      let t = this.parseType(tn);\r\n      if (!t) return null;\r\n      if (t.kind != NodeKind.TYPE) {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          t.range\r\n        );\r\n        return null;\r\n      }\r\n      extendsType = <TypeNode>t;\r\n    }\r\n\r\n    var implementsTypes: TypeNode[] | null = null;\r\n    if (tn.skip(Token.IMPLEMENTS)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode.Interface_declaration_cannot_have_implements_clause,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n      do {\r\n        let type = this.parseType(tn);\r\n        if (!type) return null;\r\n        if (!isInterface) {\r\n          if (!implementsTypes) implementsTypes = [];\r\n          implementsTypes.push(<TypeNode>type);\r\n        }\r\n      } while (tn.skip(Token.COMMA));\r\n    }\r\n\r\n    if (!tn.skip(Token.OPENBRACE)) {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"{\"\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var members = new Array<DeclarationStatement>();\r\n    var declaration: ClassDeclaration;\r\n    if (isInterface) {\r\n      assert(!implementsTypes);\r\n      declaration = Node.createInterfaceDeclaration(\r\n        identifier,\r\n        typeParameters,\r\n        extendsType,\r\n        members,\r\n        decorators,\r\n        flags,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n    } else {\r\n      declaration = Node.createClassDeclaration(\r\n        identifier,\r\n        typeParameters,\r\n        extendsType,\r\n        implementsTypes,\r\n        members,\r\n        decorators,\r\n        flags,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n    }\r\n    if (!tn.skip(Token.CLOSEBRACE)) {\r\n      do {\r\n        let member = this.parseClassMember(tn, declaration);\r\n        if (!member) return null;\r\n        member.parent = declaration;\r\n        members.push(<DeclarationStatement>member);\r\n      } while (!tn.skip(Token.CLOSEBRACE));\r\n    }\r\n    return declaration;\r\n  }\r\n\r\n  parseClassExpression(tn: Tokenizer): ClassExpression | null {\r\n\r\n    // at 'class': Identifier? '{' ... '}'\r\n\r\n    var startPos = tn.tokenPos;\r\n    var name: IdentifierExpression;\r\n\r\n    if (tn.skipIdentifier()) {\r\n      name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    } else {\r\n      name = Node.createEmptyIdentifierExpression(tn.range(tn.pos));\r\n    }\r\n\r\n    if (!tn.skip(Token.OPENBRACE)) {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(tn.pos), \"{\"\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var members = new Array<DeclarationStatement>();\r\n    var declaration = Node.createClassDeclaration(\r\n      name,\r\n      [],\r\n      null,\r\n      null,\r\n      members,\r\n      null,\r\n      CommonFlags.NONE,\r\n      tn.range(startPos, tn.pos)\r\n    );\r\n    if (!tn.skip(Token.CLOSEBRACE)) {\r\n      do {\r\n        let member = this.parseClassMember(tn, declaration);\r\n        if (!member) return null;\r\n        member.parent = declaration;\r\n        members.push(<DeclarationStatement>member);\r\n      } while (!tn.skip(Token.CLOSEBRACE));\r\n    }\r\n    return Node.createClassExpression(declaration);\r\n  }\r\n\r\n  parseClassMember(\r\n    tn: Tokenizer,\r\n    parent: ClassDeclaration\r\n  ): DeclarationStatement | null {\r\n\r\n    // before:\r\n    //   ('public' | 'private' | 'protected')?\r\n    //   ('static' | 'abstract')?\r\n    //   'readonly'?\r\n    //   ('get' | 'set')?\r\n    //   Identifier ...\r\n\r\n    var startPos = tn.pos;\r\n    var isInterface = parent.kind == NodeKind.INTERFACEDECLARATION;\r\n\r\n    var decorators = new Array<DecoratorNode>();\r\n    while (tn.skip(Token.AT)) {\r\n      let decorator = this.parseDecorator(tn);\r\n      if (!decorator) break;\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode.Decorators_are_not_valid_here,\r\n          decorator.range\r\n        );\r\n      }\r\n      decorators.push(<DecoratorNode>decorator);\r\n    }\r\n\r\n    // inherit ambient status\r\n    var flags = parent.flags & CommonFlags.AMBIENT;\r\n\r\n    // implemented methods are virtual\r\n    if (isInterface) flags |= CommonFlags.VIRTUAL;\r\n\r\n    if (tn.skip(Token.PUBLIC)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(), \"public\"\r\n        );\r\n      }\r\n      flags |= CommonFlags.PUBLIC;\r\n    } else if (tn.skip(Token.PRIVATE)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(), \"private\"\r\n        );\r\n      }\r\n      flags |= CommonFlags.PRIVATE;\r\n    } else if (tn.skip(Token.PROTECTED)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(), \"protected\"\r\n        );\r\n      }\r\n      flags |= CommonFlags.PROTECTED;\r\n    }\r\n\r\n    var staticStart: i32 = 0;\r\n    var staticEnd: i32 = 0;\r\n    var abstractStart: i32 = 0;\r\n    var abstractEnd: i32 = 0;\r\n    if (tn.skip(Token.STATIC)) {\r\n      if (isInterface) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(), \"static\"\r\n        );\r\n      }\r\n      flags |= CommonFlags.STATIC;\r\n      staticStart = tn.tokenPos;\r\n      staticEnd = tn.pos;\r\n    } else {\r\n      flags |= CommonFlags.INSTANCE;\r\n      if (tn.skip(Token.ABSTRACT)) {\r\n        if (isInterface) {\r\n          this.error(\r\n            DiagnosticCode._0_modifier_cannot_be_used_here,\r\n            tn.range(), \"abstract\"\r\n          );\r\n        }\r\n        flags |= CommonFlags.ABSTRACT;\r\n        abstractStart = tn.tokenPos;\r\n        abstractEnd = tn.pos;\r\n      }\r\n      if (parent.flags & CommonFlags.GENERIC) {\r\n        flags |= CommonFlags.GENERIC_CONTEXT;\r\n      }\r\n    }\r\n\r\n    var readonlyStart: i32 = 0;\r\n    var readonlyEnd: i32 = 0;\r\n    if (tn.skip(Token.READONLY)) {\r\n      flags |= CommonFlags.READONLY;\r\n      readonlyStart = tn.tokenPos;\r\n      readonlyEnd = tn.pos;\r\n    }\r\n\r\n    // check if accessor: ('get' | 'set') ^\\n Identifier\r\n    var state = tn.mark();\r\n    var isConstructor = false;\r\n    var isGetter = false;\r\n    var getStart: i32 = 0;\r\n    var getEnd: i32 = 0;\r\n    var isSetter = false;\r\n    var setStart: i32 = 0;\r\n    var setEnd: i32 = 0;\r\n    if (!isInterface) {\r\n      if (tn.skip(Token.GET)) {\r\n        if (tn.peek(true, IdentifierHandling.PREFER) == Token.IDENTIFIER && !tn.nextTokenOnNewLine) {\r\n          flags |= CommonFlags.GET;\r\n          isGetter = true;\r\n          setStart = tn.tokenPos;\r\n          setEnd = tn.pos;\r\n          if (flags & CommonFlags.READONLY) {\r\n            this.error(\r\n              DiagnosticCode._0_modifier_cannot_be_used_here,\r\n              tn.range(readonlyStart, readonlyEnd), \"readonly\"\r\n            ); // recoverable\r\n          }\r\n        } else {\r\n          tn.reset(state);\r\n        }\r\n      } else if (tn.skip(Token.SET)) {\r\n        if (tn.peek(true, IdentifierHandling.PREFER) == Token.IDENTIFIER && !tn.nextTokenOnNewLine) {\r\n          flags |= CommonFlags.SET | CommonFlags.SET;\r\n          isSetter = true;\r\n          setStart = tn.tokenPos;\r\n          setEnd = tn.pos;\r\n          if (flags & CommonFlags.READONLY) {\r\n            this.error(\r\n              DiagnosticCode._0_modifier_cannot_be_used_here,\r\n              tn.range(readonlyStart, readonlyEnd), \"readonly\"\r\n            ); // recoverable\r\n          }\r\n        } else {\r\n          tn.reset(state);\r\n        }\r\n      } else if (tn.skip(Token.CONSTRUCTOR)) {\r\n        flags |= CommonFlags.CONSTRUCTOR;\r\n        isConstructor = true;\r\n        if (flags & CommonFlags.STATIC) {\r\n          this.error(\r\n            DiagnosticCode._0_modifier_cannot_be_used_here,\r\n            tn.range(staticStart, staticEnd), \"static\"\r\n          ); // recoverable\r\n        }\r\n        if (flags & CommonFlags.ABSTRACT) {\r\n          this.error(\r\n            DiagnosticCode._0_modifier_cannot_be_used_here,\r\n            tn.range(abstractStart, abstractEnd), \"abstract\"\r\n          ); // recoverable\r\n        }\r\n        if (flags & CommonFlags.READONLY) {\r\n          this.error(\r\n            DiagnosticCode._0_modifier_cannot_be_used_here,\r\n            tn.range(readonlyStart, readonlyEnd), \"readonly\"\r\n          ); // recoverable\r\n        }\r\n      }\r\n    }\r\n\r\n    if (!isConstructor && !tn.skipIdentifier()) {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n      return null;\r\n    }\r\n\r\n    var name = isConstructor\r\n      ? Node.createConstructorExpression(tn.range())\r\n      : Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    var typeParameters: TypeParameterNode[] | null = null;\r\n    if (tn.skip(Token.LESSTHAN)) {\r\n      let typeParametersStart = tn.tokenPos;\r\n      typeParameters = this.parseTypeParameters(tn);\r\n      if (!typeParameters) return null;\r\n      if (isConstructor) {\r\n        this.error(\r\n          DiagnosticCode.Type_parameters_cannot_appear_on_a_constructor_declaration,\r\n          tn.range(typeParametersStart, tn.pos)\r\n        ); // recoverable\r\n      } else if (isGetter || isSetter) {\r\n        this.error(\r\n          DiagnosticCode.An_accessor_cannot_have_type_parameters,\r\n          tn.range(typeParametersStart, tn.pos)\r\n        ); // recoverable\r\n      } else {\r\n        flags |= CommonFlags.GENERIC;\r\n      }\r\n    }\r\n\r\n    // method: '(' Parameters (':' Type)? '{' Statement* '}' ';'?\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let signatureStart = tn.tokenPos;\r\n      let parameters = this.parseParameters(tn, isConstructor);\r\n      if (!parameters) return null;\r\n      let thisType = this.parseParametersThis;\r\n      if (isConstructor) {\r\n        for (let i = 0, k = parameters.length; i < k; ++i) {\r\n          let parameter = parameters[i];\r\n          if (parameter.isAny(\r\n            CommonFlags.PUBLIC |\r\n            CommonFlags.PROTECTED |\r\n            CommonFlags.PRIVATE |\r\n            CommonFlags.READONLY\r\n          )) {\r\n            let implicitFieldDeclaration = Node.createFieldDeclaration(\r\n              parameter.name,\r\n              parameter.type,\r\n              null, // initialized via parameter\r\n              null,\r\n              parameter.flags | CommonFlags.INSTANCE,\r\n              parameter.range\r\n            );\r\n            implicitFieldDeclaration.parameterIndex = i;\r\n            implicitFieldDeclaration.parent = parent;\r\n            parameter.implicitFieldDeclaration = implicitFieldDeclaration;\r\n            parent.members.push(implicitFieldDeclaration);\r\n          }\r\n        }\r\n      } else if (isGetter) {\r\n        if (parameters.length) {\r\n          this.error(\r\n            DiagnosticCode.A_get_accessor_cannot_have_parameters,\r\n            name.range\r\n          );\r\n        }\r\n      } else if (isSetter) {\r\n        if (parameters.length != 1) {\r\n          this.error(\r\n            DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,\r\n            name.range\r\n          );\r\n        }\r\n        if (parameters.length && parameters[0].initializer) {\r\n          this.error(\r\n            DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,\r\n            name.range\r\n          );\r\n        }\r\n      }\r\n\r\n      let returnType: CommonTypeNode | null = null;\r\n      if (tn.skip(Token.COLON)) {\r\n        if (name.kind == NodeKind.CONSTRUCTOR) {\r\n          this.error(\r\n            DiagnosticCode.Type_annotation_cannot_appear_on_a_constructor_declaration,\r\n            tn.range()\r\n          );\r\n        } else if (isSetter) {\r\n          this.error(\r\n            DiagnosticCode.A_set_accessor_cannot_have_a_return_type_annotation,\r\n            tn.range()\r\n          );\r\n        }\r\n        returnType = this.parseType(tn, name.kind == NodeKind.CONSTRUCTOR || isSetter);\r\n        if (!returnType) return null;\r\n      } else {\r\n        returnType = Node.createOmittedType(tn.range(tn.pos));\r\n        if (!isSetter && name.kind != NodeKind.CONSTRUCTOR) {\r\n          this.error(\r\n            DiagnosticCode.Type_expected,\r\n            returnType.range\r\n          ); // recoverable\r\n        }\r\n      }\r\n\r\n      let signature = Node.createSignature(\r\n        parameters,\r\n        returnType,\r\n        thisType,\r\n        false,\r\n        tn.range(signatureStart, tn.pos)\r\n      );\r\n\r\n      let body: Statement | null = null;\r\n      if (tn.skip(Token.OPENBRACE)) {\r\n        if (flags & CommonFlags.AMBIENT) {\r\n          this.error(\r\n            DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,\r\n            tn.range()\r\n          ); // recoverable\r\n        } else if (flags & CommonFlags.ABSTRACT) {\r\n          this.error(\r\n            DiagnosticCode.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract,\r\n            tn.range(), name.text\r\n          ); // recoverable\r\n        }\r\n        body = this.parseBlockStatement(tn, false);\r\n        if (!body) return null;\r\n      } else if (!(flags & CommonFlags.AMBIENT) && !isInterface) {\r\n        this.error(\r\n          DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n\r\n      let retMethod = Node.createMethodDeclaration(\r\n        name,\r\n        typeParameters,\r\n        signature,\r\n        body,\r\n        decorators,\r\n        flags,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n      tn.skip(Token.SEMICOLON);\r\n      return retMethod;\r\n\r\n    } else if (isConstructor) {\r\n      this.error(\r\n        DiagnosticCode.Constructor_implementation_is_missing,\r\n        name.range\r\n      );\r\n\r\n    } else if (isGetter || isSetter) {\r\n      this.error(\r\n        DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,\r\n        name.range\r\n      );\r\n\r\n    // field: (':' Type)? ('=' Expression)? ';'?\r\n    } else {\r\n      if (flags & CommonFlags.ABSTRACT) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(abstractStart, abstractEnd), \"abstract\"\r\n        ); // recoverable\r\n      }\r\n\r\n      if (flags & CommonFlags.GET) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(getStart, getEnd), \"get\"\r\n        ); // recoverable\r\n      }\r\n\r\n      if (flags & CommonFlags.SET) {\r\n        this.error(\r\n          DiagnosticCode._0_modifier_cannot_be_used_here,\r\n          tn.range(setStart, setEnd), \"set\"\r\n        ); // recoverable\r\n      }\r\n\r\n      let type: CommonTypeNode | null = null;\r\n      if (tn.skip(Token.COLON)) {\r\n        type = this.parseType(tn);\r\n        if (!type) return null;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Type_expected,\r\n          tn.range()\r\n        ); // recoverable\r\n      }\r\n      let initializer: Expression | null = null;\r\n      if (tn.skip(Token.EQUALS)) {\r\n        initializer = this.parseExpression(tn);\r\n        if (!initializer) return null;\r\n      }\r\n      let retField = Node.createFieldDeclaration(\r\n        name,\r\n        type,\r\n        initializer,\r\n        decorators,\r\n        flags,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n      tn.skip(Token.SEMICOLON);\r\n      return retField;\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseNamespace(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): NamespaceDeclaration | null {\r\n\r\n    // at 'namespace': Identifier '{' (Variable | Function)* '}'\r\n\r\n    if (tn.skipIdentifier()) {\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      if (tn.skip(Token.OPENBRACE)) {\r\n        let members = new Array<Statement>();\r\n        let ns = Node.createNamespaceDeclaration(\r\n          identifier,\r\n          members,\r\n          decorators,\r\n          flags,\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n        while (!tn.skip(Token.CLOSEBRACE)) {\r\n          let member = this.parseTopLevelStatement(tn, ns);\r\n          if (!member) return null;\r\n          member.parent = ns;\r\n          members.push(member);\r\n        }\r\n        tn.skip(Token.SEMICOLON);\r\n        return ns;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"{\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseExport(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    startPos: i32\r\n  ): ExportStatement | null {\r\n\r\n    // at 'export': '{' ExportMember (',' ExportMember)* }' ('from' StringLiteral)? ';'?\r\n\r\n    var path: StringLiteralExpression | null = null;\r\n    if (tn.skip(Token.OPENBRACE)) {\r\n      let members = new Array<ExportMember>();\r\n      while (!tn.skip(Token.CLOSEBRACE)) {\r\n          let member = this.parseExportMember(tn);\r\n          if (!member) return null;\r\n          members.push(member);\r\n        if (!tn.skip(Token.COMMA)) {\r\n          if (tn.skip(Token.CLOSEBRACE)) {\r\n            break;\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"}\"\r\n            );\r\n            return null;\r\n          }\r\n        }\r\n      }\r\n      if (tn.skip(Token.FROM)) {\r\n        if (tn.skip(Token.STRINGLITERAL)) {\r\n          path = Node.createStringLiteralExpression(tn.readString(), tn.range());\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.String_literal_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n      let ret = Node.createExportStatement(members, path, flags, tn.range(startPos, tn.pos));\r\n      let internalPath = ret.internalPath;\r\n      if (internalPath !== null && !this.seenlog.has(internalPath)) {\r\n        this.backlog.push(internalPath);\r\n        this.seenlog.add(internalPath);\r\n      }\r\n      tn.skip(Token.SEMICOLON);\r\n      return ret;\r\n    } else if (tn.skip(Token.ASTERISK)) {\r\n      if (tn.skip(Token.FROM)) {\r\n        if (tn.skip(Token.STRINGLITERAL)) {\r\n          path = Node.createStringLiteralExpression(tn.readString(), tn.range());\r\n          let ret = Node.createExportStatement(null, path, flags, tn.range(startPos, tn.pos));\r\n          let internalPath = assert(ret.internalPath);\r\n          let source = tn.source;\r\n          if (!source.exportPaths) source.exportPaths = new Set();\r\n          source.exportPaths.add(internalPath);\r\n          if (!this.seenlog.has(internalPath)) {\r\n            this.backlog.push(internalPath);\r\n            this.seenlog.add(internalPath);\r\n          }\r\n          tn.skip(Token.SEMICOLON);\r\n          return ret;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.String_literal_expected,\r\n            tn.range()\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"from\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"{\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseExportMember(\r\n    tn: Tokenizer\r\n  ): ExportMember | null {\r\n\r\n    // before: Identifier ('as' Identifier)?\r\n\r\n    if (tn.skipIdentifier()) {\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let asIdentifier: IdentifierExpression | null = null;\r\n      if (tn.skip(Token.AS)) {\r\n        if (tn.skipIdentifierName()) {\r\n          asIdentifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n      return Node.createExportMember(\r\n        identifier,\r\n        asIdentifier,\r\n        asIdentifier\r\n          ? Range.join(identifier.range, asIdentifier.range)\r\n          : identifier.range\r\n      );\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseImport(\r\n    tn: Tokenizer\r\n  ): ImportStatement | null {\r\n\r\n    // at 'import':\r\n    //  ('{' (ImportMember (',' ImportMember)* '}') | ('*' 'as' Identifier)?\r\n    //  'from' StringLiteral ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var members: ImportDeclaration[] | null = null;\r\n    var namespaceName: IdentifierExpression | null = null;\r\n    var skipFrom = false;\r\n    if (tn.skip(Token.OPENBRACE)) {\r\n      members = new Array();\r\n      while (!tn.skip(Token.CLOSEBRACE)) {\r\n        let member = this.parseImportDeclaration(tn);\r\n        if (!member) return null;\r\n        members.push(member);\r\n        if (!tn.skip(Token.COMMA)) {\r\n          if (tn.skip(Token.CLOSEBRACE)) {\r\n            break;\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"}\"\r\n            );\r\n            return null;\r\n          }\r\n        }\r\n      }\r\n    } else if (tn.skip(Token.ASTERISK)) {\r\n      if (tn.skip(Token.AS)) {\r\n        if (tn.skipIdentifier()) {\r\n          namespaceName = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"as\"\r\n        );\r\n        return null;\r\n      }\r\n    } else {\r\n      skipFrom = true;\r\n    }\r\n\r\n    if (skipFrom || tn.skip(Token.FROM)) {\r\n      if (tn.skip(Token.STRINGLITERAL)) {\r\n        let path = Node.createStringLiteralExpression(tn.readString(), tn.range());\r\n        let ret: ImportStatement;\r\n        if (namespaceName) {\r\n          assert(!members);\r\n          ret = Node.createImportStatementWithWildcard(namespaceName, path, tn.range(startPos, tn.pos));\r\n        } else {\r\n          ret = Node.createImportStatement(members, path, tn.range(startPos, tn.pos));\r\n        }\r\n        let internalPath = ret.internalPath;\r\n        if (!this.seenlog.has(internalPath)) {\r\n          this.backlog.push(internalPath);\r\n          this.seenlog.add(internalPath);\r\n        }\r\n        tn.skip(Token.SEMICOLON);\r\n        return ret;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.String_literal_expected,\r\n          tn.range()\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"from\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseImportDeclaration(\r\n    tn: Tokenizer\r\n  ): ImportDeclaration | null {\r\n\r\n    // before: Identifier ('as' Identifier)?\r\n\r\n    if (tn.skipIdentifierName()) {\r\n      let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let asIdentifier: IdentifierExpression | null = null;\r\n      if (tn.skip(Token.AS)) {\r\n        if (tn.skipIdentifier()) {\r\n          asIdentifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n      return Node.createImportDeclaration(\r\n        identifier,\r\n        asIdentifier,\r\n        asIdentifier\r\n          ? Range.join(identifier.range, asIdentifier.range)\r\n          : identifier.range\r\n      );\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseExportImport(\r\n    tn: Tokenizer,\r\n    startPos: i32\r\n  ): ExportImportStatement | null {\r\n\r\n    // at 'export' 'import': Identifier ('=' Identifier)? ';'?\r\n\r\n    if (tn.skipIdentifier()) {\r\n      let asIdentifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      if (tn.skip(Token.EQUALS)) {\r\n        if (tn.skipIdentifier()) {\r\n          let identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n          let ret = Node.createExportImportStatement(identifier, asIdentifier, tn.range(startPos, tn.pos));\r\n          tn.skip(Token.SEMICOLON);\r\n          return ret;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"=\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseStatement(\r\n    tn: Tokenizer,\r\n    topLevel: bool = false\r\n  ): Statement | null {\r\n\r\n    // at previous token\r\n\r\n    var state = tn.mark();\r\n    var token = tn.next();\r\n    var statement: Statement | null = null;\r\n    switch (token) {\r\n      case Token.BREAK: {\r\n        statement = this.parseBreak(tn);\r\n        break;\r\n      }\r\n      case Token.CONST: {\r\n        statement = this.parseVariable(tn, CommonFlags.CONST, null, tn.tokenPos);\r\n        break;\r\n      }\r\n      case Token.CONTINUE: {\r\n        statement = this.parseContinue(tn);\r\n        break;\r\n      }\r\n      case Token.DO: {\r\n        statement = this.parseDoStatement(tn);\r\n        break;\r\n      }\r\n      case Token.FOR: {\r\n        statement = this.parseForStatement(tn);\r\n        break;\r\n      }\r\n      case Token.IF: {\r\n        statement = this.parseIfStatement(tn);\r\n        break;\r\n      }\r\n      case Token.LET: {\r\n        statement = this.parseVariable(tn, CommonFlags.LET, null, tn.tokenPos);\r\n        break;\r\n      }\r\n      case Token.VAR: {\r\n        statement = this.parseVariable(tn, CommonFlags.NONE, null, tn.tokenPos);\r\n        break;\r\n      }\r\n      case Token.OPENBRACE: {\r\n        statement = this.parseBlockStatement(tn, topLevel);\r\n        break;\r\n      }\r\n      case Token.RETURN: {\r\n        if (topLevel) {\r\n          this.error(\r\n            DiagnosticCode.A_return_statement_can_only_be_used_within_a_function_body,\r\n            tn.range()\r\n          ); // recoverable\r\n        }\r\n        statement = this.parseReturn(tn);\r\n        break;\r\n      }\r\n      case Token.SEMICOLON: {\r\n        return Node.createEmptyStatement(tn.range(tn.tokenPos));\r\n      }\r\n      case Token.SWITCH: {\r\n        statement = this.parseSwitchStatement(tn);\r\n        break;\r\n      }\r\n      case Token.THROW: {\r\n        statement = this.parseThrowStatement(tn);\r\n        break;\r\n      }\r\n      case Token.TRY: {\r\n        statement = this.parseTryStatement(tn);\r\n        break;\r\n      }\r\n      case Token.VOID: {\r\n        statement = this.parseVoidStatement(tn);\r\n        break;\r\n      }\r\n      case Token.WHILE: {\r\n        statement = this.parseWhileStatement(tn);\r\n        break;\r\n      }\r\n      case Token.TYPE: { // also identifier\r\n        if (tn.peek(false, IdentifierHandling.PREFER) == Token.IDENTIFIER) {\r\n          statement = this.parseTypeDeclaration(tn, CommonFlags.NONE, null, tn.tokenPos);\r\n          break;\r\n        }\r\n        // fall-through\r\n      }\r\n      default: {\r\n        tn.reset(state);\r\n        statement = this.parseExpressionStatement(tn);\r\n        break;\r\n      }\r\n    }\r\n    if (!statement) { // has been reported\r\n      tn.reset(state);\r\n      this.skipStatement(tn);\r\n    } else {\r\n      tn.discard(state);\r\n    }\r\n    return statement;\r\n  }\r\n\r\n  parseBlockStatement(\r\n    tn: Tokenizer,\r\n    topLevel: bool\r\n  ): BlockStatement | null {\r\n\r\n    // at '{': Statement* '}' ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var statements = new Array<Statement>();\r\n    while (!tn.skip(Token.CLOSEBRACE)) {\r\n      let state = tn.mark();\r\n      let statement = this.parseStatement(tn, topLevel);\r\n      if (!statement) {\r\n        if (tn.token == Token.ENDOFFILE) return null;\r\n        tn.reset(state);\r\n        this.skipStatement(tn);\r\n      } else {\r\n        tn.discard(state);\r\n        statements.push(statement);\r\n      }\r\n    }\r\n    var ret = Node.createBlockStatement(statements, tn.range(startPos, tn.pos));\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseBreak(\r\n    tn: Tokenizer\r\n  ): BreakStatement | null {\r\n\r\n    // at 'break': Identifier? ';'?\r\n\r\n    var identifier: IdentifierExpression | null = null;\r\n    if (tn.peek(true) == Token.IDENTIFIER && !tn.nextTokenOnNewLine) {\r\n      tn.next(IdentifierHandling.PREFER);\r\n      identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    }\r\n    var ret = Node.createBreakStatement(identifier, tn.range());\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseContinue(\r\n    tn: Tokenizer\r\n  ): ContinueStatement | null {\r\n\r\n    // at 'continue': Identifier? ';'?\r\n\r\n    var identifier: IdentifierExpression | null = null;\r\n    if (tn.peek(true) == Token.IDENTIFIER && !tn.nextTokenOnNewLine) {\r\n      tn.next(IdentifierHandling.PREFER);\r\n      identifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n    }\r\n    var ret = Node.createContinueStatement(identifier, tn.range());\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseDoStatement(\r\n    tn: Tokenizer\r\n  ): DoStatement | null {\r\n\r\n    // at 'do': Statement 'while' '(' Expression ')' ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var statement = this.parseStatement(tn);\r\n    if (!statement) return null;\r\n\r\n    if (tn.skip(Token.WHILE)) {\r\n\r\n      if (tn.skip(Token.OPENPAREN)) {\r\n        let condition = this.parseExpression(tn);\r\n        if (!condition) return null;\r\n\r\n        if (tn.skip(Token.CLOSEPAREN)) {\r\n          let ret = Node.createDoStatement(<Statement>statement, <Expression>condition, tn.range(startPos, tn.pos));\r\n          tn.skip(Token.SEMICOLON);\r\n          return ret;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"(\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"while\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseExpressionStatement(\r\n    tn: Tokenizer\r\n  ): ExpressionStatement | null {\r\n\r\n    // at previous token\r\n\r\n    var expr = this.parseExpression(tn);\r\n    if (!expr) return null;\r\n\r\n    var ret = Node.createExpressionStatement(expr);\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseForStatement(\r\n    tn: Tokenizer\r\n  ): ForStatement | null {\r\n\r\n    // at 'for': '(' Statement? Expression? ';' Expression? ')' Statement\r\n\r\n    var startPos = tn.tokenPos;\r\n\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let initializer: Statement | null = null;\r\n\r\n      if (tn.skip(Token.CONST)) {\r\n        initializer = this.parseVariable(tn, CommonFlags.CONST, null, tn.tokenPos);\r\n      } else if (tn.skip(Token.LET)) {\r\n        initializer = this.parseVariable(tn, CommonFlags.LET, null, tn.tokenPos);\r\n      } else if (tn.skip(Token.VAR)) {\r\n        initializer = this.parseVariable(tn, CommonFlags.NONE, null, tn.tokenPos);\r\n\r\n      } else if (!tn.skip(Token.SEMICOLON)) {\r\n        initializer = this.parseExpressionStatement(tn);\r\n        if (!initializer) return null;\r\n      }\r\n\r\n      if (tn.token == Token.SEMICOLON) {\r\n        let condition: ExpressionStatement | null = null;\r\n        if (!tn.skip(Token.SEMICOLON)) {\r\n          condition = this.parseExpressionStatement(tn);\r\n          if (!condition) return null;\r\n        }\r\n\r\n        if (tn.token == Token.SEMICOLON) {\r\n          let incrementor: Expression | null = null;\r\n          if (!tn.skip(Token.CLOSEPAREN)) {\r\n            incrementor = this.parseExpression(tn);\r\n            if (!incrementor) return null;\r\n\r\n            if (!tn.skip(Token.CLOSEPAREN)) {\r\n              this.error(\r\n                DiagnosticCode._0_expected,\r\n                tn.range(), \")\"\r\n              );\r\n              return null;\r\n            }\r\n          }\r\n\r\n          let statement = this.parseStatement(tn);\r\n          if (!statement) return null;\r\n\r\n          return Node.createForStatement(\r\n            initializer,\r\n            condition\r\n              ? condition.expression\r\n              : null,\r\n            incrementor,\r\n            statement,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \";\"\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \";\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"(\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseIfStatement(\r\n    tn: Tokenizer\r\n  ): IfStatement | null {\r\n\r\n    // at 'if': '(' Expression ')' Statement ('else' Statement)?\r\n\r\n    var startPos = tn.tokenPos;\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let condition = this.parseExpression(tn);\r\n      if (!condition) return null;\r\n      if (tn.skip(Token.CLOSEPAREN)) {\r\n        let statement = this.parseStatement(tn);\r\n        if (!statement) return null;\r\n        let elseStatement: Statement | null = null;\r\n        if (tn.skip(Token.ELSE)) {\r\n          elseStatement = this.parseStatement(tn);\r\n          if (!elseStatement) return null;\r\n        }\r\n        return Node.createIfStatement(\r\n          condition,\r\n          statement,\r\n          elseStatement,\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \")\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"(\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseSwitchStatement(\r\n    tn: Tokenizer\r\n  ): SwitchStatement | null {\r\n\r\n    // at 'switch': '(' Expression ')' '{' SwitchCase* '}' ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let condition = this.parseExpression(tn);\r\n      if (!condition) return null;\r\n      if (tn.skip(Token.CLOSEPAREN)) {\r\n        if (tn.skip(Token.OPENBRACE)) {\r\n          let cases = new Array<SwitchCase>();\r\n          while (!tn.skip(Token.CLOSEBRACE)) {\r\n            let case_ = this.parseSwitchCase(tn);\r\n            if (!case_) return null;\r\n            cases.push(<SwitchCase>case_);\r\n          }\r\n          let ret = Node.createSwitchStatement(condition, cases, tn.range(startPos, tn.pos));\r\n          tn.skip(Token.SEMICOLON);\r\n          return ret;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"{\"\r\n          );\r\n        }\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \")\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"(\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseSwitchCase(\r\n    tn: Tokenizer\r\n  ): SwitchCase | null {\r\n\r\n    var startPos = tn.tokenPos;\r\n    var statements: Statement[],\r\n        statement: Statement | null;\r\n\r\n    // 'case' Expression ':' Statement*\r\n\r\n    if (tn.skip(Token.CASE)) {\r\n      let label = this.parseExpression(tn);\r\n      if (!label) return null;\r\n      if (tn.skip(Token.COLON)) {\r\n        statements = new Array<Statement>();\r\n        while (tn.peek() != Token.CASE && tn.nextToken != Token.DEFAULT && tn.nextToken != Token.CLOSEBRACE) {\r\n          statement = this.parseStatement(tn);\r\n          if (!statement) return null;\r\n          statements.push(statement);\r\n        }\r\n        return Node.createSwitchCase(label, statements, tn.range(startPos, tn.pos));\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \":\"\r\n        );\r\n      }\r\n\r\n    // 'default' ':' Statement*\r\n\r\n    } else if (tn.skip(Token.DEFAULT)) {\r\n      if (tn.skip(Token.COLON)) {\r\n        statements = new Array<Statement>();\r\n        while (tn.peek() != Token.CASE && tn.nextToken != Token.DEFAULT && tn.nextToken != Token.CLOSEBRACE) {\r\n          statement = this.parseStatement(tn);\r\n          if (!statement) return null;\r\n          statements.push(statement);\r\n        }\r\n        return Node.createSwitchCase(null, statements, tn.range(startPos, tn.pos));\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \":\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._case_or_default_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseThrowStatement(\r\n    tn: Tokenizer\r\n  ): ThrowStatement | null {\r\n\r\n    // at 'throw': Expression ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var expression = this.parseExpression(tn);\r\n    if (!expression) return null;\r\n    var ret = Node.createThrowStatement(<Expression>expression, tn.range(startPos, tn.pos));\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseTryStatement(\r\n    tn: Tokenizer\r\n  ): TryStatement | null {\r\n\r\n    // at 'try':\r\n    //   '{' Statement* '}'\r\n    //   ('catch' '(' VariableMember ')' '{' Statement* '}')?\r\n    //   ('finally' '{' Statement* '}'? ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var stmt: Statement | null;\r\n    if (tn.skip(Token.OPENBRACE)) {\r\n      let statements = new Array<Statement>();\r\n      while (!tn.skip(Token.CLOSEBRACE)) {\r\n        stmt = this.parseStatement(tn);\r\n        if (!stmt) return null;\r\n        statements.push(<Statement>stmt);\r\n      }\r\n      let catchVariable: IdentifierExpression | null = null;\r\n      let catchStatements: Statement[] | null = null;\r\n      let finallyStatements: Statement[] | null = null;\r\n      if (tn.skip(Token.CATCH)) {\r\n        if (!tn.skip(Token.OPENPAREN)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"(\"\r\n          );\r\n          return null;\r\n        }\r\n        if (!tn.skipIdentifier()) {\r\n          this.error(\r\n            DiagnosticCode.Identifier_expected,\r\n            tn.range()\r\n          );\r\n          return null;\r\n        }\r\n        catchVariable = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n        if (!tn.skip(Token.CLOSEPAREN)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n        if (!tn.skip(Token.OPENBRACE)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"{\"\r\n          );\r\n          return null;\r\n        }\r\n        catchStatements = [];\r\n        while (!tn.skip(Token.CLOSEBRACE)) {\r\n          stmt = this.parseStatement(tn);\r\n          if (!stmt) return null;\r\n          catchStatements.push(<Statement>stmt);\r\n        }\r\n      }\r\n      if (tn.skip(Token.FINALLY)) {\r\n        if (!tn.skip(Token.OPENBRACE)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"{\"\r\n          );\r\n          return null;\r\n        }\r\n        finallyStatements = [];\r\n        while (!tn.skip(Token.CLOSEBRACE)) {\r\n          stmt = this.parseStatement(tn);\r\n          if (!stmt) return null;\r\n          finallyStatements.push(<Statement>stmt);\r\n        }\r\n      }\r\n      if (!(catchStatements || finallyStatements)) {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"catch\"\r\n        );\r\n        return null;\r\n      }\r\n      let ret = Node.createTryStatement(\r\n        statements,\r\n        catchVariable,\r\n        catchStatements,\r\n        finallyStatements,\r\n        tn.range(startPos, tn.pos)\r\n      );\r\n      tn.skip(Token.SEMICOLON);\r\n      return ret;\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"{\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseTypeDeclaration(\r\n    tn: Tokenizer,\r\n    flags: CommonFlags,\r\n    decorators: DecoratorNode[] | null,\r\n    startPos: i32\r\n  ): TypeDeclaration | null {\r\n\r\n    // at 'type': Identifier ('<' TypeParameters '>')? '=' Type ';'?\r\n\r\n    if (tn.skipIdentifier()) {\r\n      let name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      let typeParameters: TypeParameterNode[] | null = null;\r\n      if (tn.skip(Token.LESSTHAN)) {\r\n        typeParameters = this.parseTypeParameters(tn);\r\n        if (!typeParameters) return null;\r\n        flags |= CommonFlags.GENERIC;\r\n      }\r\n      if (tn.skip(Token.EQUALS)) {\r\n        let type = this.parseType(tn);\r\n        if (!type) return null;\r\n        let ret = Node.createTypeDeclaration(\r\n          name,\r\n          typeParameters,\r\n          type,\r\n          decorators,\r\n          flags,\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n        tn.skip(Token.SEMICOLON);\r\n        return ret;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \"=\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode.Identifier_expected,\r\n        tn.range()\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  parseVoidStatement(\r\n    tn: Tokenizer\r\n  ): VoidStatement | null {\r\n\r\n    // at 'void': Expression ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    var expression = this.parseExpression(tn, Precedence.GROUPING);\r\n    if (!expression) return null;\r\n    var ret = Node.createVoidStatement(expression, tn.range(startPos, tn.pos));\r\n    tn.skip(Token.SEMICOLON);\r\n    return ret;\r\n  }\r\n\r\n  parseWhileStatement(\r\n    tn: Tokenizer\r\n  ): WhileStatement | null {\r\n\r\n    // at 'while': '(' Expression ')' Statement ';'?\r\n\r\n    var startPos = tn.tokenPos;\r\n    if (tn.skip(Token.OPENPAREN)) {\r\n      let expression = this.parseExpression(tn);\r\n      if (!expression) return null;\r\n      if (tn.skip(Token.CLOSEPAREN)) {\r\n        let statement = this.parseStatement(tn);\r\n        if (!statement) return null;\r\n        let ret = Node.createWhileStatement(expression, statement, tn.range(startPos, tn.pos));\r\n        tn.skip(Token.SEMICOLON);\r\n        return ret;\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \")\"\r\n        );\r\n      }\r\n    } else {\r\n      this.error(\r\n        DiagnosticCode._0_expected,\r\n        tn.range(), \"(\"\r\n      );\r\n    }\r\n    return null;\r\n  }\r\n\r\n  // expressions\r\n  // see: http://www.engr.mun.ca/~theo/Misc/exp_parsing.htm#climbing\r\n\r\n  parseExpressionStart(\r\n    tn: Tokenizer\r\n  ): Expression | null {\r\n\r\n    var token = tn.next(IdentifierHandling.PREFER);\r\n    var startPos = tn.tokenPos;\r\n    var precedence = determinePrecedenceStart(token);\r\n    if (precedence != Precedence.NONE) {\r\n      let operand: Expression | null;\r\n\r\n      // TODO: SpreadExpression, YieldExpression (currently become unsupported UnaryPrefixExpressions)\r\n\r\n      // NewExpression\r\n      if (token == Token.NEW) {\r\n        operand = this.parseExpression(tn, Precedence.CALL);\r\n        if (!operand) return null;\r\n        if (operand.kind == NodeKind.CALL) {\r\n          return Node.createNewExpression(\r\n            (<CallExpression>operand).expression,\r\n            (<CallExpression>operand).typeArguments,\r\n            (<CallExpression>operand).arguments,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            tn.range()\r\n          );\r\n        }\r\n        return null;\r\n      } else {\r\n        operand = this.parseExpression(tn, precedence);\r\n        if (!operand) return null;\r\n      }\r\n\r\n      // UnaryPrefixExpression\r\n      if (token == Token.PLUS_PLUS || token == Token.MINUS_MINUS) {\r\n        if (\r\n          operand.kind != NodeKind.IDENTIFIER &&\r\n          operand.kind != NodeKind.ELEMENTACCESS &&\r\n          operand.kind != NodeKind.PROPERTYACCESS\r\n        ) {\r\n          this.error(\r\n            DiagnosticCode.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access,\r\n            operand.range\r\n          );\r\n        }\r\n      }\r\n      return Node.createUnaryPrefixExpression(token, operand, tn.range(startPos, tn.pos));\r\n    }\r\n\r\n    var expr: Expression | null = null;\r\n    switch (token) {\r\n\r\n      case Token.NULL: return Node.createNullExpression(tn.range());\r\n      case Token.TRUE: return Node.createTrueExpression(tn.range());\r\n      case Token.FALSE: return Node.createFalseExpression(tn.range());\r\n\r\n      // ParenthesizedExpression\r\n      // FunctionExpression\r\n      case Token.OPENPAREN: {\r\n\r\n        // determine whether this is a function expression\r\n        if (tn.skip(Token.CLOSEPAREN)) { // must be a function expression (fast route)\r\n          return this.parseFunctionExpressionCommon(\r\n            tn,\r\n            Node.createEmptyIdentifierExpression(tn.range(startPos)),\r\n            [],\r\n            true\r\n          );\r\n        }\r\n        let state = tn.mark();\r\n        let again = true;\r\n        do {\r\n          switch (tn.next(IdentifierHandling.PREFER)) {\r\n\r\n            // function expression\r\n            case Token.DOT_DOT_DOT: {\r\n              tn.reset(state);\r\n              return this.parseFunctionExpression(tn);\r\n            }\r\n            // can be both\r\n            case Token.IDENTIFIER: {\r\n              tn.readIdentifier();\r\n              switch (tn.next()) {\r\n\r\n                // if we got here, check for arrow\r\n                case Token.CLOSEPAREN: {\r\n                  if (!tn.skip(Token.EQUALS_GREATERTHAN)) {\r\n                    again = false;\r\n                    break;\r\n                  }\r\n                  // fall-through\r\n                }\r\n                // function expression\r\n                case Token.COLON: {    // type annotation\r\n                  tn.reset(state);\r\n                  return this.parseFunctionExpression(tn);\r\n                }\r\n                // can be both\r\n                case Token.QUESTION:   // optional parameter or ternary\r\n                case Token.COMMA: {\r\n                  break; // continue\r\n                }\r\n                // parenthesized expression\r\n                // case Token.EQUALS:  // missing type annotation for simplicity\r\n                default: {\r\n                  again = false;\r\n                  break;\r\n                }\r\n              }\r\n              break;\r\n            }\r\n            // parenthesized expression\r\n            default: {\r\n              again = false;\r\n              break;\r\n            }\r\n          }\r\n        } while (again);\r\n        tn.reset(state);\r\n\r\n        // parse parenthesized\r\n        expr = this.parseExpression(tn);\r\n        if (!expr) return null;\r\n        if (!tn.skip(Token.CLOSEPAREN)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n        return Node.createParenthesizedExpression(expr, tn.range(startPos, tn.pos));\r\n      }\r\n      // ArrayLiteralExpression\r\n      case Token.OPENBRACKET: {\r\n        let elementExpressions = new Array<Expression | null>();\r\n        while (!tn.skip(Token.CLOSEBRACKET)) {\r\n          if (tn.peek() == Token.COMMA) {\r\n            expr = null; // omitted\r\n          } else {\r\n            expr = this.parseExpression(tn, Precedence.COMMA + 1);\r\n            if (!expr) return null;\r\n          }\r\n          elementExpressions.push(expr);\r\n          if (!tn.skip(Token.COMMA)) {\r\n            if (tn.skip(Token.CLOSEBRACKET)) {\r\n              break;\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode._0_expected,\r\n                tn.range(), \"]\"\r\n              );\r\n              return null;\r\n            }\r\n          }\r\n        }\r\n        return Node.createArrayLiteralExpression(elementExpressions, tn.range(startPos, tn.pos));\r\n      }\r\n      // ObjectLiteralExpression\r\n      case Token.OPENBRACE: {\r\n        let startPos = tn.tokenPos;\r\n        let names = new Array<IdentifierExpression>();\r\n        let values = new Array<Expression>();\r\n        let name: IdentifierExpression;\r\n        while (!tn.skip(Token.CLOSEBRACE)) {\r\n          if (!tn.skipIdentifier()) {\r\n            if (!tn.skip(Token.STRINGLITERAL)) {\r\n              this.error(\r\n                DiagnosticCode.Identifier_expected,\r\n                tn.range(),\r\n              );\r\n              return null;\r\n            }\r\n            name = Node.createIdentifierExpression(tn.readString(), tn.range());\r\n            name.set(CommonFlags.QUOTED);\r\n          } else {\r\n            name = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n          }\r\n          names.push(name);\r\n          if (tn.skip(Token.COLON)) {\r\n            let value = this.parseExpression(tn, Precedence.COMMA + 1);\r\n            if (!value) return null;\r\n            values.push(value);\r\n          } else if (!name.is(CommonFlags.QUOTED)) {\r\n            values.push(name);\r\n          } else {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \":\"\r\n            );\r\n            return null;\r\n          }\r\n          if (!tn.skip(Token.COMMA)) {\r\n            if (tn.skip(Token.CLOSEBRACE)) {\r\n              break;\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode._0_expected,\r\n                tn.range(), \"}\"\r\n              );\r\n              return null;\r\n            }\r\n          }\r\n        }\r\n        return Node.createObjectLiteralExpression(names, values, tn.range(startPos, tn.pos));\r\n      }\r\n      // AssertionExpression (unary prefix)\r\n      case Token.LESSTHAN: {\r\n        let toType = this.parseType(tn);\r\n        if (!toType) return null;\r\n        if (!tn.skip(Token.GREATERTHAN)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \">\"\r\n          );\r\n          return null;\r\n        }\r\n        expr = this.parseExpression(tn, Precedence.CALL);\r\n        if (!expr) return null;\r\n        return Node.createAssertionExpression(\r\n          AssertionKind.PREFIX,\r\n          expr,\r\n          toType,\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n      }\r\n      case Token.IDENTIFIER: {\r\n        return Node.createIdentifierExpression(tn.readIdentifier(), tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.THIS: {\r\n        return Node.createThisExpression(tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.CONSTRUCTOR: {\r\n        return Node.createConstructorExpression(tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.SUPER: {\r\n        return Node.createSuperExpression(tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.STRINGLITERAL: {\r\n        return Node.createStringLiteralExpression(tn.readString(), tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.INTEGERLITERAL: {\r\n        return Node.createIntegerLiteralExpression(tn.readInteger(), tn.range(startPos, tn.pos));\r\n      }\r\n      case Token.FLOATLITERAL: {\r\n        return Node.createFloatLiteralExpression(tn.readFloat(), tn.range(startPos, tn.pos));\r\n      }\r\n      // RegexpLiteralExpression\r\n      // note that this also continues on invalid ones so the surrounding AST remains intact\r\n      case Token.SLASH: {\r\n        let regexpPattern = tn.readRegexpPattern(); // also reports\r\n        if (!tn.skip(Token.SLASH)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"/\"\r\n          );\r\n          return null;\r\n        }\r\n        return Node.createRegexpLiteralExpression(\r\n          regexpPattern,\r\n          tn.readRegexpFlags(), // also reports\r\n          tn.range(startPos, tn.pos)\r\n        );\r\n      }\r\n      case Token.FUNCTION: {\r\n        return this.parseFunctionExpression(tn);\r\n      }\r\n      case Token.CLASS: {\r\n        return this.parseClassExpression(tn);\r\n      }\r\n      default: {\r\n        if (token == Token.ENDOFFILE) {\r\n          this.error(\r\n            DiagnosticCode.Unexpected_end_of_text,\r\n            tn.range(startPos)\r\n          );\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Expression_expected,\r\n            tn.range()\r\n          );\r\n        }\r\n        return null;\r\n      }\r\n    }\r\n  }\r\n\r\n  tryParseTypeArgumentsBeforeArguments(\r\n    tn: Tokenizer\r\n  ): CommonTypeNode[] | null {\r\n\r\n    // at '<': Type (',' Type)* '>' '('\r\n\r\n    var state = tn.mark();\r\n    if (!tn.skip(Token.LESSTHAN)) return null;\r\n    var typeArguments = new Array<CommonTypeNode>();\r\n    do {\r\n      if (tn.peek() === Token.GREATERTHAN) {\r\n        break;\r\n      }\r\n      let type = this.parseType(tn, true, true);\r\n      if (!type) {\r\n        tn.reset(state);\r\n        return null;\r\n      }\r\n      typeArguments.push(type);\r\n    } while (tn.skip(Token.COMMA));\r\n    if (tn.skip(Token.GREATERTHAN) && tn.skip(Token.OPENPAREN)) {\r\n      return typeArguments;\r\n    }\r\n    tn.reset(state);\r\n    return null;\r\n  }\r\n\r\n  parseArguments(\r\n    tn: Tokenizer\r\n  ): Expression[] | null {\r\n\r\n    // at '(': (Expression (',' Expression)*)? ')'\r\n\r\n    var args = new Array<Expression>();\r\n    while (!tn.skip(Token.CLOSEPAREN)) {\r\n      let expr = this.parseExpression(tn, Precedence.COMMA + 1);\r\n      if (!expr) return null;\r\n      args.push(expr);\r\n      if (!tn.skip(Token.COMMA)) {\r\n        if (tn.skip(Token.CLOSEPAREN)) {\r\n          break;\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \")\"\r\n          );\r\n          return null;\r\n        }\r\n      }\r\n    }\r\n    return args;\r\n  }\r\n\r\n  parseExpression(\r\n    tn: Tokenizer,\r\n    precedence: Precedence = Precedence.COMMA\r\n  ): Expression | null {\r\n    assert(precedence != Precedence.NONE);\r\n\r\n    var expr = this.parseExpressionStart(tn);\r\n    if (!expr) return null;\r\n    var startPos = expr.range.start;\r\n\r\n    // CallExpression?\r\n    if (nodeIsCallable(expr.kind)) {\r\n      let typeArguments: CommonTypeNode[] | null = null;\r\n      while (\r\n        tn.skip(Token.OPENPAREN)\r\n        ||\r\n        nodeIsGenericCallable(expr.kind) && (typeArguments = this.tryParseTypeArgumentsBeforeArguments(tn)) !== null\r\n      ) {\r\n        let args = this.parseArguments(tn);\r\n        if (!args) return null;\r\n        expr = Node.createCallExpression(expr, typeArguments, args, tn.range(startPos, tn.pos)); // is again callable\r\n      }\r\n    }\r\n\r\n    var token: Token;\r\n    var next: Expression | null = null;\r\n    var nextPrecedence: Precedence;\r\n    while (\r\n      (nextPrecedence = determinePrecedence(token = tn.peek())) >= precedence\r\n    ) { // precedence climbing\r\n      tn.next();\r\n      switch (token) {\r\n        // AssertionExpression\r\n        case Token.AS: {\r\n          let toType = this.parseType(tn); // reports\r\n          if (!toType) return null;\r\n          expr = Node.createAssertionExpression(\r\n            AssertionKind.AS,\r\n            expr,\r\n            toType,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // InstanceOfExpression\r\n        case Token.INSTANCEOF: {\r\n          let isType = this.parseType(tn); // reports\r\n          if (!isType) return null;\r\n          expr = Node.createInstanceOfExpression(\r\n            expr,\r\n            isType,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // ElementAccessExpression\r\n        case Token.OPENBRACKET: {\r\n          next = this.parseExpression(tn); // reports\r\n          if (!next) return null;\r\n          if (!tn.skip(Token.CLOSEBRACKET)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \"]\"\r\n            );\r\n            return null;\r\n          }\r\n          expr = Node.createElementAccessExpression(\r\n            expr,\r\n            next,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // UnaryPostfixExpression\r\n        case Token.PLUS_PLUS:\r\n        case Token.MINUS_MINUS: {\r\n          if (\r\n            expr.kind != NodeKind.IDENTIFIER &&\r\n            expr.kind != NodeKind.ELEMENTACCESS &&\r\n            expr.kind != NodeKind.PROPERTYACCESS\r\n          ) {\r\n            this.error(\r\n              DiagnosticCode.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access,\r\n              expr.range\r\n            );\r\n          }\r\n          expr = Node.createUnaryPostfixExpression(\r\n            token,\r\n            expr,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // TernaryExpression\r\n        case Token.QUESTION: {\r\n          let ifThen = this.parseExpression(tn);\r\n          if (!ifThen) return null;\r\n          if (!tn.skip(Token.COLON)) {\r\n            this.error(\r\n              DiagnosticCode._0_expected,\r\n              tn.range(), \":\"\r\n            );\r\n            return null;\r\n          }\r\n          let ifElse = this.parseExpression(tn, precedence > Precedence.COMMA\r\n            ? Precedence.COMMA + 1\r\n            : Precedence.COMMA\r\n          );\r\n          if (!ifElse) return null;\r\n          expr = Node.createTernaryExpression(\r\n            expr,\r\n            ifThen,\r\n            ifElse,\r\n            tn.range(startPos, tn.pos)\r\n          );\r\n          break;\r\n        }\r\n        // CommaExpression\r\n        case Token.COMMA: {\r\n          let commaExprs: Expression[] = [ expr ];\r\n          do {\r\n            expr = this.parseExpression(tn, Precedence.COMMA + 1);\r\n            if (!expr) return null;\r\n            commaExprs.push(expr);\r\n          } while (tn.skip(Token.COMMA));\r\n          expr = Node.createCommaExpression(commaExprs, tn.range(startPos, tn.pos));\r\n          break;\r\n        }\r\n        default: {\r\n          next = this.parseExpression(tn,\r\n            isRightAssociative(token)\r\n              ? nextPrecedence\r\n              : nextPrecedence + 1\r\n          );\r\n          if (!next) return null;\r\n\r\n          // PropertyAccessExpression\r\n          if (token == Token.DOT) {\r\n            if (next.kind == NodeKind.IDENTIFIER) {\r\n              expr = Node.createPropertyAccessExpression(\r\n                expr,\r\n                <IdentifierExpression>next,\r\n                tn.range(startPos, tn.pos)\r\n              );\r\n            } else if (next.kind == NodeKind.CALL) { // join\r\n              let propertyCall = <CallExpression>next;\r\n              if (propertyCall.expression.kind == NodeKind.IDENTIFIER) {\r\n                propertyCall.expression = Node.createPropertyAccessExpression(\r\n                  expr,\r\n                  <IdentifierExpression>propertyCall.expression,\r\n                  tn.range(startPos, tn.pos)\r\n                );\r\n              } else {\r\n                this.error(\r\n                  DiagnosticCode.Identifier_expected,\r\n                  propertyCall.expression.range\r\n                );\r\n                return null;\r\n              }\r\n              expr = propertyCall;\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode.Identifier_expected,\r\n                next.range\r\n              );\r\n              return null;\r\n            }\r\n\r\n          // BinaryExpression\r\n          } else {\r\n            expr = Node.createBinaryExpression(token, expr, next, tn.range(startPos, tn.pos));\r\n          }\r\n          break;\r\n        }\r\n      }\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  /** Skips over a statement on errors in an attempt to reduce unnecessary diagnostic noise. */\r\n  skipStatement(tn: Tokenizer): void {\r\n    tn.peek(true);\r\n    if (tn.nextTokenOnNewLine) tn.next(); // if reset() to the previous line\r\n    do {\r\n      let nextToken = tn.peek(true);\r\n      if (\r\n        nextToken == Token.ENDOFFILE ||   // next step should handle this\r\n        nextToken == Token.SEMICOLON      // end of the statement for sure\r\n      ) {\r\n        tn.next();\r\n        break;\r\n      }\r\n      if (tn.nextTokenOnNewLine) break;   // end of the statement maybe\r\n      switch (tn.next()) {\r\n        case Token.IDENTIFIER: {\r\n          tn.readIdentifier();\r\n          break;\r\n        }\r\n        case Token.STRINGLITERAL: {\r\n          tn.readString();\r\n          break;\r\n        }\r\n        case Token.INTEGERLITERAL: {\r\n          tn.readInteger();\r\n          break;\r\n        }\r\n        case Token.FLOATLITERAL: {\r\n          tn.readFloat();\r\n          break;\r\n        }\r\n      }\r\n    } while (true);\r\n  }\r\n\r\n  /** Skips over a block on errors in an attempt to reduce unnecessary diagnostic noise. */\r\n  skipBlock(tn: Tokenizer): void {\r\n    // at '{': ... '}'\r\n    var depth = 1;\r\n    var again = true;\r\n    do {\r\n      switch (tn.next()) {\r\n        case Token.ENDOFFILE: {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(), \"}\"\r\n          );\r\n          again = false;\r\n          break;\r\n        }\r\n        case Token.OPENBRACE: {\r\n          ++depth;\r\n          break;\r\n        }\r\n        case Token.CLOSEBRACE: {\r\n          --depth;\r\n          if (!depth) again = false;\r\n          break;\r\n        }\r\n        case Token.IDENTIFIER: {\r\n          tn.readIdentifier();\r\n          break;\r\n        }\r\n        case Token.STRINGLITERAL: {\r\n          tn.readString();\r\n          break;\r\n        }\r\n        case Token.INTEGERLITERAL: {\r\n          tn.readInteger();\r\n          break;\r\n        }\r\n        case Token.FLOATLITERAL: {\r\n          tn.readFloat();\r\n          break;\r\n        }\r\n      }\r\n    } while (again);\r\n  }\r\n}\r\n\r\n/** Operator precedence from least to largest. */\r\nexport const enum Precedence {\r\n  NONE,\r\n  COMMA,\r\n  SPREAD,\r\n  YIELD,\r\n  ASSIGNMENT,\r\n  CONDITIONAL,\r\n  LOGICAL_OR,\r\n  LOGICAL_AND,\r\n  BITWISE_OR,\r\n  BITWISE_XOR,\r\n  BITWISE_AND,\r\n  EQUALITY,\r\n  RELATIONAL,\r\n  SHIFT,\r\n  ADDITIVE,\r\n  MULTIPLICATIVE,\r\n  EXPONENTIATED,\r\n  UNARY_PREFIX,\r\n  UNARY_POSTFIX,\r\n  CALL,\r\n  MEMBERACCESS,\r\n  GROUPING\r\n}\r\n\r\n/** Determines the precedence of a starting token. */\r\nfunction determinePrecedenceStart(kind: Token): Precedence {\r\n  switch (kind) {\r\n    case Token.DOT_DOT_DOT: return Precedence.SPREAD;\r\n    case Token.YIELD: return Precedence.YIELD;\r\n    case Token.EXCLAMATION:\r\n    case Token.TILDE:\r\n    case Token.PLUS:\r\n    case Token.MINUS:\r\n    case Token.PLUS_PLUS:\r\n    case Token.MINUS_MINUS:\r\n    case Token.TYPEOF:\r\n    case Token.VOID:\r\n    case Token.DELETE: return Precedence.UNARY_PREFIX;\r\n    case Token.NEW: return Precedence.MEMBERACCESS;\r\n  }\r\n  return Precedence.NONE;\r\n}\r\n\r\n/** Determines the precende of a non-starting token. */\r\nfunction determinePrecedence(kind: Token): Precedence {\r\n  switch (kind) {\r\n    case Token.COMMA: return Precedence.COMMA;\r\n    case Token.EQUALS:\r\n    case Token.PLUS_EQUALS:\r\n    case Token.MINUS_EQUALS:\r\n    case Token.ASTERISK_ASTERISK_EQUALS:\r\n    case Token.ASTERISK_EQUALS:\r\n    case Token.SLASH_EQUALS:\r\n    case Token.PERCENT_EQUALS:\r\n    case Token.LESSTHAN_LESSTHAN_EQUALS:\r\n    case Token.GREATERTHAN_GREATERTHAN_EQUALS:\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:\r\n    case Token.AMPERSAND_EQUALS:\r\n    case Token.CARET_EQUALS:\r\n    case Token.BAR_EQUALS: return Precedence.ASSIGNMENT;\r\n    case Token.QUESTION: return Precedence.CONDITIONAL;\r\n    case Token.BAR_BAR: return Precedence.LOGICAL_OR;\r\n    case Token.AMPERSAND_AMPERSAND: return Precedence.LOGICAL_AND;\r\n    case Token.BAR: return Precedence.BITWISE_OR;\r\n    case Token.CARET: return Precedence.BITWISE_XOR;\r\n    case Token.AMPERSAND: return Precedence.BITWISE_AND;\r\n    case Token.EQUALS_EQUALS:\r\n    case Token.EXCLAMATION_EQUALS:\r\n    case Token.EQUALS_EQUALS_EQUALS:\r\n    case Token.EXCLAMATION_EQUALS_EQUALS: return Precedence.EQUALITY;\r\n    case Token.AS:\r\n    case Token.IN:\r\n    case Token.INSTANCEOF:\r\n    case Token.LESSTHAN:\r\n    case Token.GREATERTHAN:\r\n    case Token.LESSTHAN_EQUALS:\r\n    case Token.GREATERTHAN_EQUALS: return Precedence.RELATIONAL;\r\n    case Token.LESSTHAN_LESSTHAN:\r\n    case Token.GREATERTHAN_GREATERTHAN:\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN: return Precedence.SHIFT;\r\n    case Token.PLUS:\r\n    case Token.MINUS: return Precedence.ADDITIVE;\r\n    case Token.ASTERISK:\r\n    case Token.SLASH:\r\n    case Token.PERCENT: return Precedence.MULTIPLICATIVE;\r\n    case Token.ASTERISK_ASTERISK: return Precedence.EXPONENTIATED;\r\n    case Token.PLUS_PLUS:\r\n    case Token.MINUS_MINUS: return Precedence.UNARY_POSTFIX;\r\n    case Token.DOT:\r\n    case Token.NEW:\r\n    case Token.OPENBRACKET: return Precedence.MEMBERACCESS;\r\n  }\r\n  return Precedence.NONE;\r\n}\r\n\r\n/** Determines whether a non-starting token is right associative. */\r\nfunction isRightAssociative(kind: Token): bool {\r\n  switch (kind) {\r\n    case Token.EQUALS:\r\n    case Token.PLUS_EQUALS:\r\n    case Token.MINUS_EQUALS:\r\n    case Token.ASTERISK_ASTERISK_EQUALS:\r\n    case Token.ASTERISK_EQUALS:\r\n    case Token.SLASH_EQUALS:\r\n    case Token.PERCENT_EQUALS:\r\n    case Token.LESSTHAN_LESSTHAN_EQUALS:\r\n    case Token.GREATERTHAN_GREATERTHAN_EQUALS:\r\n    case Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:\r\n    case Token.AMPERSAND_EQUALS:\r\n    case Token.CARET_EQUALS:\r\n    case Token.BAR_EQUALS:\r\n    case Token.QUESTION:\r\n    case Token.ASTERISK_ASTERISK: return true;\r\n    default: return false;\r\n  }\r\n}\r\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/src/compiler.ts b/src/compiler.ts
index 672aebd8..ad1e00fb 100644
--- a/src/compiler.ts
+++ b/src/compiler.ts
@@ -2641,7 +2641,7 @@ export class Compiler extends DiagnosticEmitter {
       // i32 or smaller to i64
       } else if (toType.is(TypeFlags.LONG)) {
         expr = module.createUnary(
-          toType.is(TypeFlags.SIGNED) ? UnaryOp.ExtendI32 : UnaryOp.ExtendU32,
+          fromType.is(TypeFlags.SIGNED) ? UnaryOp.ExtendI32 : UnaryOp.ExtendU32,
           this.ensureSmallIntegerWrap(expr, fromType) // must clear garbage bits
         );
         wrapMode = WrapMode.NONE;
diff --git a/tests/compiler/binary.optimized.wat b/tests/compiler/binary.optimized.wat
index 1e6b5f1a..2b586e66 100644
--- a/tests/compiler/binary.optimized.wat
+++ b/tests/compiler/binary.optimized.wat
@@ -116,7 +116,7 @@
    (f64.reinterpret/i64
     (i64.shl
      (i64.add
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $1)
       )
       (i64.const 1023)
@@ -877,7 +877,7 @@
                (i64.const 4294967295)
               )
               (i64.shl
-               (i64.extend_u/i32
+               (i64.extend_s/i32
                 (get_local $5)
                )
                (i64.const 32)
@@ -912,7 +912,7 @@
           (tee_local $3
            (f64.reinterpret/i64
             (i64.shl
-             (i64.extend_u/i32
+             (i64.extend_s/i32
               (i32.add
                (i32.add
                 (i32.or
@@ -1321,7 +1321,7 @@
       (set_local $3
        (f64.reinterpret/i64
         (i64.shl
-         (i64.extend_u/i32
+         (i64.extend_s/i32
           (i32.and
            (get_local $7)
            (i32.xor
@@ -1523,7 +1523,7 @@
            (i64.const 4294967295)
           )
           (i64.shl
-           (i64.extend_u/i32
+           (i64.extend_s/i32
             (get_local $8)
            )
            (i64.const 32)
@@ -3366,7 +3366,7 @@
       )
       (i64.shl
        (get_local $2)
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.sub
          (i32.const 1)
          (get_local $3)
@@ -3422,7 +3422,7 @@
       )
       (i64.shl
        (get_local $5)
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.sub
          (i32.const 1)
          (get_local $6)
@@ -3543,7 +3543,7 @@
           (i64.const 4503599627370496)
          )
          (i64.shl
-          (i64.extend_u/i32
+          (i64.extend_s/i32
            (get_local $3)
           )
           (i64.const 52)
@@ -3551,7 +3551,7 @@
         )
         (i64.shr_u
          (get_local $2)
-         (i64.extend_u/i32
+         (i64.extend_s/i32
           (i32.sub
            (i32.const 1)
            (get_local $3)
@@ -3561,7 +3561,7 @@
        )
       )
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $8)
        )
        (i64.const 63)
diff --git a/tests/compiler/binary.untouched.wat b/tests/compiler/binary.untouched.wat
index 1140d885..f5b035f9 100644
--- a/tests/compiler/binary.untouched.wat
+++ b/tests/compiler/binary.untouched.wat
@@ -123,7 +123,7 @@
     (i64.shl
      (i64.add
       (i64.const 1023)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $1)
       )
      )
@@ -932,7 +932,7 @@
         (i64.const 4294967295)
        )
        (i64.shl
-        (i64.extend_u/i32
+        (i64.extend_s/i32
          (get_local $7)
         )
         (i64.const 32)
@@ -984,7 +984,7 @@
     (set_local $30
      (f64.reinterpret/i64
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.add
          (i32.add
           (i32.or
@@ -1461,7 +1461,7 @@
     (set_local $20
      (f64.reinterpret/i64
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.and
          (get_local $25)
          (i32.xor
@@ -1679,7 +1679,7 @@
        (i64.const 4294967295)
       )
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $24)
        )
        (i64.const 32)
@@ -3728,7 +3728,7 @@
     (set_local $2
      (i64.shl
       (get_local $2)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.add
         (i32.sub
          (i32.const 0)
@@ -3802,7 +3802,7 @@
     (set_local $3
      (i64.shl
       (get_local $3)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.add
         (i32.sub
          (i32.const 0)
@@ -3968,7 +3968,7 @@
      (i64.or
       (get_local $2)
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $4)
        )
        (i64.const 52)
@@ -3979,7 +3979,7 @@
    (set_local $2
     (i64.shr_u
      (get_local $2)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (i32.add
        (i32.sub
         (i32.const 0)
@@ -3995,7 +3995,7 @@
    (i64.or
     (get_local $2)
     (i64.shl
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (get_local $6)
      )
      (i64.const 63)
diff --git a/tests/compiler/getter-call.optimized.wat b/tests/compiler/getter-call.optimized.wat
new file mode 100644
index 00000000..53e54335
--- /dev/null
+++ b/tests/compiler/getter-call.optimized.wat
@@ -0,0 +1,135 @@
+(module
+ (type $i (func (result i32)))
+ (type $ii (func (param i32) (result i32)))
+ (type $v (func))
+ (global $~lib/allocator/arena/startOffset (mut i32) (i32.const 0))
+ (global $~lib/allocator/arena/offset (mut i32) (i32.const 0))
+ (global $~argc (mut i32) (i32.const 0))
+ (table 1 1 anyfunc)
+ (elem (i32.const 0) $getter-call/C#get:x~anonymous|0)
+ (memory $0 0)
+ (export "memory" (memory $0))
+ (export "table" (table $0))
+ (export "test" (func $getter-call/test))
+ (start $start)
+ (func $~lib/allocator/arena/__memory_allocate (; 0 ;) (; has Stack IR ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (if
+   (i32.gt_u
+    (get_local $0)
+    (i32.const 1073741824)
+   )
+   (unreachable)
+  )
+  (if
+   (i32.gt_u
+    (tee_local $2
+     (i32.and
+      (i32.add
+       (i32.add
+        (tee_local $1
+         (get_global $~lib/allocator/arena/offset)
+        )
+        (select
+         (get_local $0)
+         (i32.const 1)
+         (i32.gt_u
+          (get_local $0)
+          (i32.const 1)
+         )
+        )
+       )
+       (i32.const 7)
+      )
+      (i32.const -8)
+     )
+    )
+    (i32.shl
+     (tee_local $3
+      (current_memory)
+     )
+     (i32.const 16)
+    )
+   )
+   (if
+    (i32.lt_s
+     (grow_memory
+      (select
+       (get_local $3)
+       (tee_local $0
+        (i32.shr_u
+         (i32.and
+          (i32.add
+           (i32.sub
+            (get_local $2)
+            (get_local $1)
+           )
+           (i32.const 65535)
+          )
+          (i32.const -65536)
+         )
+         (i32.const 16)
+        )
+       )
+       (i32.gt_s
+        (get_local $3)
+        (get_local $0)
+       )
+      )
+     )
+     (i32.const 0)
+    )
+    (if
+     (i32.lt_s
+      (grow_memory
+       (get_local $0)
+      )
+      (i32.const 0)
+     )
+     (unreachable)
+    )
+   )
+  )
+  (set_global $~lib/allocator/arena/offset
+   (get_local $2)
+  )
+  (get_local $1)
+ )
+ (func $~lib/memory/memory.allocate (; 1 ;) (; has Stack IR ;) (type $ii) (param $0 i32) (result i32)
+  (call $~lib/allocator/arena/__memory_allocate
+   (get_local $0)
+  )
+ )
+ (func $getter-call/C#get:x~anonymous|0 (; 2 ;) (; has Stack IR ;) (type $i) (result i32)
+  (i32.const 42)
+ )
+ (func $getter-call/C#get:x (; 3 ;) (; has Stack IR ;) (type $ii) (param $0 i32) (result i32)
+  (i32.const 0)
+ )
+ (func $getter-call/test (; 4 ;) (; has Stack IR ;) (type $i) (result i32)
+  (local $0 i32)
+  (set_local $0
+   (call $~lib/memory/memory.allocate
+    (i32.const 0)
+   )
+  )
+  (set_global $~argc
+   (i32.const 0)
+  )
+  (call_indirect (type $i)
+   (call $getter-call/C#get:x
+    (get_local $0)
+   )
+  )
+ )
+ (func $start (; 5 ;) (; has Stack IR ;) (type $v)
+  (set_global $~lib/allocator/arena/startOffset
+   (i32.const 8)
+  )
+  (set_global $~lib/allocator/arena/offset
+   (get_global $~lib/allocator/arena/startOffset)
+  )
+ )
+)
diff --git a/tests/compiler/portable-conversions.untouched.wat b/tests/compiler/portable-conversions.untouched.wat
index 17ca97a7..28172787 100644
--- a/tests/compiler/portable-conversions.untouched.wat
+++ b/tests/compiler/portable-conversions.untouched.wat
@@ -154,7 +154,7 @@
    )
   )
   (drop
-   (i64.extend_u/i32
+   (i64.extend_s/i32
     (get_global $portable-conversions/i)
    )
   )
diff --git a/tests/compiler/std/libm.optimized.wat b/tests/compiler/std/libm.optimized.wat
index e849f2fe..90ac8dbd 100644
--- a/tests/compiler/std/libm.optimized.wat
+++ b/tests/compiler/std/libm.optimized.wat
@@ -2683,7 +2683,7 @@
    (f64.reinterpret/i64
     (i64.shl
      (i64.add
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $2)
       )
       (i64.const 1023)
@@ -2750,7 +2750,7 @@
    (i64.shl
     (i64.sub
      (i64.const 1023)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (get_local $2)
      )
     )
@@ -2900,7 +2900,7 @@
    (f64.reinterpret/i64
     (i64.shl
      (i64.add
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $1)
       )
       (i64.const 1023)
@@ -4954,7 +4954,7 @@
                (i64.const 4294967295)
               )
               (i64.shl
-               (i64.extend_u/i32
+               (i64.extend_s/i32
                 (get_local $5)
                )
                (i64.const 32)
@@ -4989,7 +4989,7 @@
           (tee_local $3
            (f64.reinterpret/i64
             (i64.shl
-             (i64.extend_u/i32
+             (i64.extend_s/i32
               (i32.add
                (i32.add
                 (i32.or
@@ -5398,7 +5398,7 @@
       (set_local $3
        (f64.reinterpret/i64
         (i64.shl
-         (i64.extend_u/i32
+         (i64.extend_s/i32
           (i32.and
            (get_local $7)
            (i32.xor
@@ -5600,7 +5600,7 @@
            (i64.const 4294967295)
           )
           (i64.shl
-           (i64.extend_u/i32
+           (i64.extend_s/i32
             (get_local $8)
            )
            (i64.const 32)
diff --git a/tests/compiler/std/libm.untouched.wat b/tests/compiler/std/libm.untouched.wat
index 5c7e3066..8980d416 100644
--- a/tests/compiler/std/libm.untouched.wat
+++ b/tests/compiler/std/libm.untouched.wat
@@ -3120,7 +3120,7 @@
    (i64.shl
     (i64.add
      (i64.const 1023)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (get_local $3)
      )
     )
@@ -3189,7 +3189,7 @@
    (i64.shl
     (i64.sub
      (i64.const 1023)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (get_local $3)
      )
     )
@@ -3347,7 +3347,7 @@
     (i64.shl
      (i64.add
       (i64.const 1023)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $1)
       )
      )
@@ -5651,7 +5651,7 @@
         (i64.const 4294967295)
        )
        (i64.shl
-        (i64.extend_u/i32
+        (i64.extend_s/i32
          (get_local $7)
         )
         (i64.const 32)
@@ -5703,7 +5703,7 @@
     (set_local $30
      (f64.reinterpret/i64
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.add
          (i32.add
           (i32.or
@@ -6180,7 +6180,7 @@
     (set_local $20
      (f64.reinterpret/i64
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.and
          (get_local $25)
          (i32.xor
@@ -6398,7 +6398,7 @@
        (i64.const 4294967295)
       )
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $24)
        )
        (i64.const 32)
diff --git a/tests/compiler/std/math.optimized.wat b/tests/compiler/std/math.optimized.wat
index 18fa8fa8..12ae19df 100644
--- a/tests/compiler/std/math.optimized.wat
+++ b/tests/compiler/std/math.optimized.wat
@@ -226,7 +226,7 @@
    (f64.reinterpret/i64
     (i64.shl
      (i64.add
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $1)
       )
       (i64.const 1023)
@@ -5448,7 +5448,7 @@
    (f64.reinterpret/i64
     (i64.shl
      (i64.add
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $2)
       )
       (i64.const 1023)
@@ -5515,7 +5515,7 @@
    (i64.shl
     (i64.sub
      (i64.const 1023)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (get_local $2)
      )
     )
@@ -8705,7 +8705,7 @@
       )
       (i64.shl
        (get_local $2)
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.sub
          (i32.const 1)
          (get_local $3)
@@ -8761,7 +8761,7 @@
       )
       (i64.shl
        (get_local $5)
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.sub
          (i32.const 1)
          (get_local $6)
@@ -8882,7 +8882,7 @@
           (i64.const 4503599627370496)
          )
          (i64.shl
-          (i64.extend_u/i32
+          (i64.extend_s/i32
            (get_local $3)
           )
           (i64.const 52)
@@ -8890,7 +8890,7 @@
         )
         (i64.shr_u
          (get_local $2)
-         (i64.extend_u/i32
+         (i64.extend_s/i32
           (i32.sub
            (i32.const 1)
            (get_local $3)
@@ -8900,7 +8900,7 @@
        )
       )
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $8)
        )
        (i64.const 63)
@@ -10054,7 +10054,7 @@
                (i64.const 4294967295)
               )
               (i64.shl
-               (i64.extend_u/i32
+               (i64.extend_s/i32
                 (get_local $5)
                )
                (i64.const 32)
@@ -10089,7 +10089,7 @@
           (tee_local $3
            (f64.reinterpret/i64
             (i64.shl
-             (i64.extend_u/i32
+             (i64.extend_s/i32
               (i32.add
                (i32.add
                 (i32.or
@@ -10498,7 +10498,7 @@
       (set_local $3
        (f64.reinterpret/i64
         (i64.shl
-         (i64.extend_u/i32
+         (i64.extend_s/i32
           (i32.and
            (get_local $7)
            (i32.xor
@@ -10700,7 +10700,7 @@
            (i64.const 4294967295)
           )
           (i64.shl
-           (i64.extend_u/i32
+           (i64.extend_s/i32
             (get_local $8)
            )
            (i64.const 32)
@@ -12598,7 +12598,7 @@
      )
      (i64.shl
       (get_local $2)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.sub
         (i32.const 1)
         (get_local $3)
@@ -12653,7 +12653,7 @@
      )
      (i64.shl
       (get_local $7)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.sub
         (i32.const 1)
         (get_local $6)
@@ -12813,7 +12813,7 @@
         (i64.const 4503599627370496)
        )
        (i64.shl
-        (i64.extend_u/i32
+        (i64.extend_s/i32
          (get_local $3)
         )
         (i64.const 52)
@@ -12821,7 +12821,7 @@
       )
       (i64.shr_u
        (get_local $2)
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.sub
          (i32.const 1)
          (get_local $3)
diff --git a/tests/compiler/std/math.untouched.wat b/tests/compiler/std/math.untouched.wat
index 60e925e5..75390db9 100644
--- a/tests/compiler/std/math.untouched.wat
+++ b/tests/compiler/std/math.untouched.wat
@@ -265,7 +265,7 @@
     (i64.shl
      (i64.add
       (i64.const 1023)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $1)
       )
      )
@@ -6337,7 +6337,7 @@
    (i64.shl
     (i64.add
      (i64.const 1023)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (get_local $3)
      )
     )
@@ -6406,7 +6406,7 @@
    (i64.shl
     (i64.sub
      (i64.const 1023)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (get_local $3)
      )
     )
@@ -10061,7 +10061,7 @@
     (set_local $2
      (i64.shl
       (get_local $2)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.add
         (i32.sub
          (i32.const 0)
@@ -10135,7 +10135,7 @@
     (set_local $3
      (i64.shl
       (get_local $3)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.add
         (i32.sub
          (i32.const 0)
@@ -10301,7 +10301,7 @@
      (i64.or
       (get_local $2)
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $4)
        )
        (i64.const 52)
@@ -10312,7 +10312,7 @@
    (set_local $2
     (i64.shr_u
      (get_local $2)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (i32.add
        (i32.sub
         (i32.const 0)
@@ -10328,7 +10328,7 @@
    (i64.or
     (get_local $2)
     (i64.shl
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (get_local $6)
      )
      (i64.const 63)
@@ -11614,7 +11614,7 @@
         (i64.const 4294967295)
        )
        (i64.shl
-        (i64.extend_u/i32
+        (i64.extend_s/i32
          (get_local $7)
         )
         (i64.const 32)
@@ -11666,7 +11666,7 @@
     (set_local $30
      (f64.reinterpret/i64
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.add
          (i32.add
           (i32.or
@@ -12143,7 +12143,7 @@
     (set_local $20
      (f64.reinterpret/i64
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.and
          (get_local $25)
          (i32.xor
@@ -12361,7 +12361,7 @@
        (i64.const 4294967295)
       )
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $24)
        )
        (i64.const 32)
@@ -14464,7 +14464,7 @@
     (set_local $9
      (i64.shl
       (get_local $9)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.add
         (i32.sub
          (i32.const 0)
@@ -14542,7 +14542,7 @@
     (set_local $3
      (i64.shl
       (get_local $3)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.add
         (i32.sub
          (i32.const 0)
@@ -14749,7 +14749,7 @@
      (i64.or
       (get_local $9)
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $4)
        )
        (i64.const 52)
@@ -14760,7 +14760,7 @@
    (set_local $9
     (i64.shr_u
      (get_local $9)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (i32.add
        (i32.sub
         (i32.const 0)
diff --git a/tests/compiler/std/mod.optimized.wat b/tests/compiler/std/mod.optimized.wat
index 63ba3772..3fbb0003 100644
--- a/tests/compiler/std/mod.optimized.wat
+++ b/tests/compiler/std/mod.optimized.wat
@@ -181,7 +181,7 @@
       )
       (i64.shl
        (get_local $2)
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.sub
          (i32.const 1)
          (get_local $3)
@@ -237,7 +237,7 @@
       )
       (i64.shl
        (get_local $5)
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.sub
          (i32.const 1)
          (get_local $6)
@@ -358,7 +358,7 @@
           (i64.const 4503599627370496)
          )
          (i64.shl
-          (i64.extend_u/i32
+          (i64.extend_s/i32
            (get_local $3)
           )
           (i64.const 52)
@@ -366,7 +366,7 @@
         )
         (i64.shr_u
          (get_local $2)
-         (i64.extend_u/i32
+         (i64.extend_s/i32
           (i32.sub
            (i32.const 1)
            (get_local $3)
@@ -376,7 +376,7 @@
        )
       )
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $8)
        )
        (i64.const 63)
diff --git a/tests/compiler/std/mod.untouched.wat b/tests/compiler/std/mod.untouched.wat
index 432214b0..cc7feea2 100644
--- a/tests/compiler/std/mod.untouched.wat
+++ b/tests/compiler/std/mod.untouched.wat
@@ -190,7 +190,7 @@
     (set_local $2
      (i64.shl
       (get_local $2)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.add
         (i32.sub
          (i32.const 0)
@@ -264,7 +264,7 @@
     (set_local $3
      (i64.shl
       (get_local $3)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (i32.add
         (i32.sub
          (i32.const 0)
@@ -430,7 +430,7 @@
      (i64.or
       (get_local $2)
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $4)
        )
        (i64.const 52)
@@ -441,7 +441,7 @@
    (set_local $2
     (i64.shr_u
      (get_local $2)
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (i32.add
        (i32.sub
         (i32.const 0)
@@ -457,7 +457,7 @@
    (i64.or
     (get_local $2)
     (i64.shl
-     (i64.extend_u/i32
+     (i64.extend_s/i32
       (get_local $6)
      )
      (i64.const 63)
diff --git a/tests/compiler/std/operator-overloading.optimized.wat b/tests/compiler/std/operator-overloading.optimized.wat
index 600ce012..4ae61358 100644
--- a/tests/compiler/std/operator-overloading.optimized.wat
+++ b/tests/compiler/std/operator-overloading.optimized.wat
@@ -399,7 +399,7 @@
    (f64.reinterpret/i64
     (i64.shl
      (i64.add
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $1)
       )
       (i64.const 1023)
@@ -1160,7 +1160,7 @@
                (i64.const 4294967295)
               )
               (i64.shl
-               (i64.extend_u/i32
+               (i64.extend_s/i32
                 (get_local $5)
                )
                (i64.const 32)
@@ -1195,7 +1195,7 @@
           (tee_local $3
            (f64.reinterpret/i64
             (i64.shl
-             (i64.extend_u/i32
+             (i64.extend_s/i32
               (i32.add
                (i32.add
                 (i32.or
@@ -1604,7 +1604,7 @@
       (set_local $3
        (f64.reinterpret/i64
         (i64.shl
-         (i64.extend_u/i32
+         (i64.extend_s/i32
           (i32.and
            (get_local $7)
            (i32.xor
@@ -1806,7 +1806,7 @@
            (i64.const 4294967295)
           )
           (i64.shl
-           (i64.extend_u/i32
+           (i64.extend_s/i32
             (get_local $8)
            )
            (i64.const 32)
diff --git a/tests/compiler/std/operator-overloading.untouched.wat b/tests/compiler/std/operator-overloading.untouched.wat
index 4a9f628d..5071adf6 100644
--- a/tests/compiler/std/operator-overloading.untouched.wat
+++ b/tests/compiler/std/operator-overloading.untouched.wat
@@ -444,7 +444,7 @@
     (i64.shl
      (i64.add
       (i64.const 1023)
-      (i64.extend_u/i32
+      (i64.extend_s/i32
        (get_local $1)
       )
      )
@@ -1253,7 +1253,7 @@
         (i64.const 4294967295)
        )
        (i64.shl
-        (i64.extend_u/i32
+        (i64.extend_s/i32
          (get_local $7)
         )
         (i64.const 32)
@@ -1305,7 +1305,7 @@
     (set_local $30
      (f64.reinterpret/i64
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.add
          (i32.add
           (i32.or
@@ -1782,7 +1782,7 @@
     (set_local $20
      (f64.reinterpret/i64
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (i32.and
          (get_local $25)
          (i32.xor
@@ -2000,7 +2000,7 @@
        (i64.const 4294967295)
       )
       (i64.shl
-       (i64.extend_u/i32
+       (i64.extend_s/i32
         (get_local $24)
        )
        (i64.const 32)
diff --git a/tests/compiler/unary.optimized.wat b/tests/compiler/unary.optimized.wat
index cabba720..cb5cd1c3 100644
--- a/tests/compiler/unary.optimized.wat
+++ b/tests/compiler/unary.optimized.wat
@@ -142,7 +142,7 @@
    )
   )
   (set_global $unary/I
-   (i64.extend_s/i32
+   (i64.extend_u/i32
     (i64.eqz
      (get_global $unary/I)
     )
@@ -305,7 +305,7 @@
    )
   )
   (set_global $unary/I
-   (i64.extend_s/i32
+   (i64.extend_u/i32
     (f64.eq
      (get_global $unary/F)
      (f64.const 0)
diff --git a/tests/compiler/unary.untouched.wat b/tests/compiler/unary.untouched.wat
index 1acd89e2..b7d25b37 100644
--- a/tests/compiler/unary.untouched.wat
+++ b/tests/compiler/unary.untouched.wat
@@ -224,7 +224,7 @@
    (i64.const -1)
   )
   (set_global $unary/I
-   (i64.extend_s/i32
+   (i64.extend_u/i32
     (i64.eqz
      (i64.const 1)
     )
@@ -246,7 +246,7 @@
    )
   )
   (set_global $unary/I
-   (i64.extend_s/i32
+   (i64.extend_u/i32
     (i64.eqz
      (get_global $unary/I)
     )
@@ -467,7 +467,7 @@
    (f64.const -1.25)
   )
   (set_global $unary/I
-   (i64.extend_s/i32
+   (i64.extend_u/i32
     (f64.eq
      (f64.const 1.25)
      (f64.const 0)
@@ -483,7 +483,7 @@
    )
   )
   (set_global $unary/I
-   (i64.extend_s/i32
+   (i64.extend_u/i32
     (f64.eq
      (get_global $unary/F)
      (f64.const 0)