diff --git a/dist/assemblyscript.js b/dist/assemblyscript.js
index ca40fc4a..22316a99 100644
--- a/dist/assemblyscript.js
+++ b/dist/assemblyscript.js
@@ -1,2 +1,2 @@
-!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t(require("binaryen")):"function"==typeof define&&define.amd?define(["binaryen"],t):"object"==typeof exports?exports.assemblyscript=t(require("binaryen")):e.assemblyscript=t(e.binaryen)}("undefined"!=typeof self?self:this,function(e){return function(e){var t={};function r(n){if(t[n])return t[n].exports;var i=t[n]={i:n,l:!1,exports:{}};return e[n].call(i.exports,i,i.exports,r),i.l=!0,i.exports}return r.m=e,r.c=t,r.d=function(e,t,n){r.o(e,t)||Object.defineProperty(e,t,{configurable:!1,enumerable:!0,get:n})},r.r=function(e){Object.defineProperty(e,"__esModule",{value:!0})},r.n=function(e){var t=e&&e.__esModule?function(){return e.default}:function(){return e};return r.d(t,"a",t),t},r.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},r.p="",r(r.s=27)}([function(e,t,r){"use strict";var n,i=this&&this.__extends||(n=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])},function(e,t){function r(){this.constructor=e}n(e,t),e.prototype=null===t?Object.create(t):(r.prototype=t.prototype,new r)}),a=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}}}},o=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),o=[];try{for(;(void 0===t||t-- >0)&&!(n=a.next()).done;)o.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 o};Object.defineProperty(t,"__esModule",{value:!0});var s=r(2),c=r(7),p=r(5),u=r(3);t.PATH_DELIMITER="/",t.PARENT_SUBST="..",t.GETTER_PREFIX="get:",t.SETTER_PREFIX="set:",t.INSTANCE_DELIMITER="#",t.STATIC_DELIMITER=".",t.LIBRARY_SUBST="(lib)",t.LIBRARY_PREFIX=t.LIBRARY_SUBST+t.PATH_DELIMITER;var l=function(){return function(){}}(),h=function(){return function(){}}(),_=function(){return function(){}}(),d=new Map,y=function(e){function r(t){void 0===t&&(t=null);var r=e.call(this,t)||this;return r.diagnosticsOffset=0,r.elementsLookup=new Map,r.typesLookup=d,r.typeAliases=new Map,r.fileLevelExports=new Map,r.moduleLevelExports=new Map,r.sources=[],r}return i(r,e),r.prototype.initialize=function(e){this.options=e,this.typesLookup=new Map([["i8",c.Type.i8],["i16",c.Type.i16],["i32",c.Type.i32],["i64",c.Type.i64],["isize",e.isizeType],["u8",c.Type.u8],["u16",c.Type.u16],["u32",c.Type.u32],["u64",c.Type.u64],["usize",e.usizeType],["bool",c.Type.bool],["f32",c.Type.f32],["f64",c.Type.f64],["void",c.Type.void],["number",c.Type.f64],["boolean",c.Type.bool]]);for(var t,r,n=new Map,i=new Array,u=new Array,l=0,h=this.sources.length;l<h;++l)for(var _=this.sources[l].statements,d=0,y=_.length;d<y;++d){var m=_[d];switch(m.kind){case p.NodeKind.CLASSDECLARATION:this.initializeClass(m,u);break;case p.NodeKind.ENUMDECLARATION:this.initializeEnum(m);break;case p.NodeKind.EXPORT:this.initializeExports(m,n);break;case p.NodeKind.FUNCTIONDECLARATION:this.initializeFunction(m);break;case p.NodeKind.IMPORT:this.initializeImports(m,n,i);break;case p.NodeKind.INTERFACEDECLARATION:this.initializeInterface(m);break;case p.NodeKind.NAMESPACEDECLARATION:this.initializeNamespace(m,u);break;case p.NodeKind.TYPEDECLARATION:this.initializeTypeAlias(m);break;case p.NodeKind.VARIABLE:this.initializeVariables(m)}}for(l=0;l<i.length;){var E=i[l];(C=this.tryResolveImport(E.referencedName,n))?(this.elementsLookup.set(E.internalName,C),i.splice(l,1)):(C=this.tryResolveImport(E.referencedNameAlt,n))?(this.elementsLookup.set(E.internalName,C),i.splice(l,1)):(this.error(s.DiagnosticCode.Module_0_has_no_exported_member_1,E.declaration.range,E.declaration.parent.path.value,E.declaration.externalName.text),++l)}try{for(var T=a(n),f=T.next();!f.done;f=T.next()){var A=o(f.value,2),I=A[0],v=A[1],N=v,C=void 0;do{if(!N.isReExport){(C=this.elementsLookup.get(N.referencedName))||(C=this.elementsLookup.get(N.member.name.text))?this.setExportAndCheckLibrary(I,C,N.member.externalName):this.error(s.DiagnosticCode.Cannot_find_name_0,v.member.range,v.member.name.text);break}if(C=this.fileLevelExports.get(N.referencedName)){this.setExportAndCheckLibrary(I,C,N.member.externalName);break}(N=n.get(N.referencedName))||this.error(s.DiagnosticCode.Module_0_has_no_exported_member_1,v.member.externalName.range,v.member.parent.path.value,v.member.externalName.text)}while(N)}}catch(e){t={error:e}}finally{try{f&&!f.done&&(r=T.return)&&r.call(T)}finally{if(t)throw t.error}}for(l=0,h=u.length;l<h;++l){var S=u[l].declaration,b=assert(S.extendsType),O=this.resolveIdentifier(b.name,null);if(O){if(O.element.kind!=g.CLASS_PROTOTYPE){this.error(s.DiagnosticCode.A_class_may_only_extend_another_class,b.range);continue}u[l].basePrototype=O.element}}},r.prototype.tryResolveImport=function(e,t){for(var r,n=this.fileLevelExports;;){if(r=n.get(e))return r;var i=t.get(e);if(!i)return null;if(!i.isReExport)return this.elementsLookup.get(i.referencedName);e=i.referencedName}},r.prototype.checkInternalDecorators=function(e,t){var r=t.parent;if(e.is(E.GLOBAL)||t.range.source.isLibrary&&e.is(E.EXPORT)&&(assert(r).kind==p.NodeKind.SOURCE||r.kind==p.NodeKind.VARIABLE&&assert(r.parent).kind==p.NodeKind.SOURCE)){var n=t.name.text;this.elementsLookup.has(n)?this.error(s.DiagnosticCode.Duplicate_identifier_0,t.name.range,e.internalName):(e.set(E.GLOBAL),this.elementsLookup.set(n,e),e.is(E.BUILTIN)&&(e.internalName=n))}},r.prototype.initializeClass=function(e,t,r){void 0===r&&(r=null);var n=e.fileLevelInternalName;if(this.elementsLookup.has(n))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n);else{var i=e.name.text,a=new U(this,i,n,e);a.namespace=r,this.elementsLookup.set(n,a);var o=e.implementsTypes,c=o.length;if(a.is(E.UNMANAGED))o&&c&&this.error(s.DiagnosticCode.Structs_cannot_implement_interfaces,p.Range.join(e.name.range,o[c-1].range));else if(c)for(var u=0;u<c;++u)this.error(s.DiagnosticCode.Operation_not_supported,o[u].range);if(e.extendsType&&t.push(a),r){if(r.members){if(r.members.has(i))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else r.members=new Map;r.members.set(i,a),r.is(E.MODULE_EXPORT)&&a.is(E.EXPORT)&&a.set(E.MODULE_EXPORT)}else if(a.is(E.EXPORT)){if(this.fileLevelExports.has(n))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,n);if(this.fileLevelExports.set(n,a),a.is(E.EXPORT)&&e.range.source.isEntry){if(this.moduleLevelExports.has(n))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,n);a.set(E.MODULE_EXPORT),this.moduleLevelExports.set(n,a)}}for(var l=e.members,h=(u=0,l.length);u<h;++u){var _=l[u];switch(_.kind){case p.NodeKind.FIELDDECLARATION:this.initializeField(_,a);break;case p.NodeKind.METHODDECLARATION:_.isAny(E.GET|E.SET)?this.initializeAccessor(_,a):this.initializeMethod(_,a);break;default:throw new Error("class member expected")}}if(this.checkInternalDecorators(a,e),a.is(E.GLOBAL)&&"String"==e.name.text)if(this.typesLookup.has("string"))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,e.programLevelInternalName);else{var d=a.resolve(null);d&&this.typesLookup.set("string",d.type)}}},r.prototype.initializeField=function(e,t){var r=e.name.text,n=e.fileLevelInternalName;if(e.is(E.STATIC)){if(this.elementsLookup.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n);if(t.members){if(t.members.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;var i=new C(this,r,n,e,c.Type.void);t.members.set(r,i),this.elementsLookup.set(n,i)}else{if(t.instanceMembers){if(t.instanceMembers.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.instanceMembers=new Map;var a=new x(t,r,n,e);t.instanceMembers.set(r,a)}},r.prototype.initializeMethod=function(e,t){var r=e.name.text,n=e.fileLevelInternalName,i=null;if(e.is(E.STATIC)){if(assert(e.name.kind!=p.NodeKind.CONSTRUCTOR),this.elementsLookup.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n);if(t.members){if(t.members.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;i=new O(this,r,n,e,t),t.members.set(r,i),this.elementsLookup.set(n,i),t.is(E.MODULE_EXPORT)&&i.set(E.MODULE_EXPORT)}else{if(t.instanceMembers){if(t.instanceMembers.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.instanceMembers=new Map;i=new O(this,r,n,e,t),e.name.kind==p.NodeKind.CONSTRUCTOR?t.constructorPrototype?this.error(s.DiagnosticCode.Multiple_constructor_implementations_are_not_allowed,e.name.range):(i.set(E.CONSTRUCTOR),t.constructorPrototype=i):t.instanceMembers.set(r,i),t.is(E.MODULE_EXPORT)&&i.set(E.MODULE_EXPORT)}this.checkOperators(e.decorators,i,t)},r.prototype.checkOperators=function(e,t,r){if(e)for(var n=0,i=e.length;n<i;++n){var a=e[n];if(a.decoratorKind==p.DecoratorKind.OPERATOR){if(!t){this.error(s.DiagnosticCode.Operation_not_supported,a.range);continue}var o=a.arguments&&a.arguments.length||0;if(1==o){var c=a.arguments[0];if(c.kind==p.NodeKind.LITERAL&&c.literalKind==p.LiteralKind.STRING)switch(c.value){case"[]":r.fnIndexedGet=t.simpleName;break;case"[]=":r.fnIndexedSet=t.simpleName;break;case"+":r.fnConcat=t.simpleName;break;case"==":r.fnEquals=t.simpleName;break;default:this.error(s.DiagnosticCode.Operation_not_supported,c.range)}else this.error(s.DiagnosticCode.String_literal_expected,c.range)}else this.error(s.DiagnosticCode.Expected_0_arguments_but_got_1,a.range,"1",o.toString(0))}else a.decoratorKind!=p.DecoratorKind.CUSTOM&&this.error(s.DiagnosticCode.Operation_not_supported,a.range)}},r.prototype.initializeAccessor=function(e,r){var n=e.name.text,i=e.fileLevelInternalName,a=this.elementsLookup.get(i),o=e.is(E.GET),c=!1;if(a){if(a.kind!=g.PROPERTY||null!=(o?a.getterPrototype:a.setterPrototype))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,i)}else a=new B(this,n,i,r),c=!0;var p=(o?t.GETTER_PREFIX:t.SETTER_PREFIX)+n;if(e.is(E.STATIC)){var u=r.internalName+t.STATIC_DELIMITER+p;if(this.elementsLookup.has(u))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,u);var l=new O(this,p,u,e,null);if(o?a.getterPrototype=l:a.setterPrototype=l,c){if(r.members){if(r.members.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,u)}else r.members=new Map;r.members.set(n,a)}else assert(r.members&&r.members.has(n));this.elementsLookup.set(i,a),r.is(E.MODULE_EXPORT)&&a.set(E.MODULE_EXPORT)}else{var h=r.internalName+t.INSTANCE_DELIMITER+p;if(r.instanceMembers){if(r.instanceMembers.has(p))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,i)}else r.instanceMembers=new Map;var _=new O(this,p,h,e,r);o?a.getterPrototype=_:a.setterPrototype=_,r.instanceMembers.set(p,a),this.elementsLookup.set(i,a),r.is(E.MODULE_EXPORT)&&a.set(E.MODULE_EXPORT)}},r.prototype.initializeEnum=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.name.text,i=new I(this,n,r,e);if(i.namespace=t,this.elementsLookup.set(r,i),t){if(t.members){if(t.members.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n,i),t.is(E.MODULE_EXPORT)&&i.set(E.MODULE_EXPORT)}else if(i.is(E.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,i),e.range.source.isEntry){if(this.moduleLevelExports.has(r))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);i.set(E.MODULE_EXPORT),this.moduleLevelExports.set(r,i)}}for(var a=e.values,o=0,c=a.length;o<c;++o)this.initializeEnumValue(a[o],i);this.checkInternalDecorators(i,e)}},r.prototype.initializeEnumValue=function(e,t){var r=e.name.text,n=e.fileLevelInternalName,i=t.is(E.MODULE_EXPORT);if(t.members){if(t.members.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;var a=new v(t,this,r,n,e);t.members.set(r,a),i&&a.set(E.MODULE_EXPORT)},r.prototype.initializeExports=function(e,t){for(var r=e.members,n=0,i=r.length;n<i;++n)this.initializeExport(r[n],e.internalPath,t)},r.prototype.setExportAndCheckLibrary=function(e,t,r){this.fileLevelExports.set(e,t),r.range.source.isLibrary&&(this.elementsLookup.has(r.text)?this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,r.range,r.text):(t.internalName=r.text,this.elementsLookup.set(r.text,t)))},r.prototype.initializeExport=function(e,r,n){var i,a,o,c=e.range.source.internalPath+t.PATH_DELIMITER+e.externalName.text;if(this.fileLevelExports.has(c))this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,c);else if(null==r){if(i=e.range.source.internalPath+t.PATH_DELIMITER+e.name.text,a=this.elementsLookup.get(i))return void this.setExportAndCheckLibrary(c,a,e.externalName);if(n.has(c))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,c);(o=new l).isReExport=!1,o.referencedName=i,o.member=e,n.set(c,o)}else{if(i=r+t.PATH_DELIMITER+e.name.text,a=this.elementsLookup.get(i))return void this.setExportAndCheckLibrary(c,a,e.externalName);for(var p=new Set;o=n.get(i);){if(!o.isReExport){if(a=this.elementsLookup.get(o.referencedName))return void this.setExportAndCheckLibrary(c,a,e.externalName);break}if(a=this.fileLevelExports.get(o.referencedName))return void this.setExportAndCheckLibrary(c,a,e.externalName);if(i=o.referencedName,p.has(o))break;p.add(o)}if(n.has(c))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,c);(o=new l).isReExport=!0,o.referencedName=i,o.member=e,n.set(c,o)}},r.prototype.initializeFunction=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.name.text,i=new O(this,n,r,e,null);if(i.namespace=t,this.elementsLookup.set(r,i),t){if(t.members){if(t.members.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n,i),t.is(E.MODULE_EXPORT)&&i.is(E.EXPORT)&&i.set(E.MODULE_EXPORT)}else if(i.is(E.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,i),e.range.source.isEntry){if(this.moduleLevelExports.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);i.set(E.MODULE_EXPORT),this.moduleLevelExports.set(r,i)}}this.checkInternalDecorators(i,e)}},r.prototype.initializeImports=function(e,r,n){var i=e.declarations;if(i)for(var a=0,o=i.length;a<o;++a)this.initializeImport(i[a],e.internalPath,r,n);else if(e.namespaceName){var c=e.range.source.internalPath+t.PATH_DELIMITER+e.namespaceName.text;if(this.elementsLookup.has(c))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.namespaceName.range,c);this.error(s.DiagnosticCode.Operation_not_supported,e.range)}},r.prototype.initializeImport=function(e,r,n,i){var a=e.fileLevelInternalName;if(this.elementsLookup.has(a))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,a);else{var o,c=r+t.PATH_DELIMITER+e.externalName.text;if(o=this.fileLevelExports.get(c))this.elementsLookup.set(a,o);else{var p=t.PATH_DELIMITER+"index",u=new h;u.internalName=a,r.endsWith(p)?(u.referencedName=c,u.referencedNameAlt=r.substring(0,r.length-p.length+1)+e.externalName.text):(u.referencedName=c,u.referencedNameAlt=r+p+t.PATH_DELIMITER+e.externalName.text),u.declaration=e,i.push(u)}}},r.prototype.initializeInterface=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=new D(this,e.name.text,r,e);if(n.namespace=t,this.elementsLookup.set(r,n),t){if(t.members){if(t.members.has(n.internalName))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n.internalName,n),t.is(E.MODULE_EXPORT)&&n.is(E.EXPORT)&&n.set(E.MODULE_EXPORT)}else if(n.is(E.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,n),e.range.source.isEntry){if(this.moduleLevelExports.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);n.set(E.MODULE_EXPORT),this.moduleLevelExports.set(r,n)}}for(var i=e.members,a=0,o=i.length;a<o;++a){var c=i[a];switch(c.kind){case p.NodeKind.FIELDDECLARATION:this.initializeField(c,n);break;case p.NodeKind.METHODDECLARATION:c.isAny(E.GET|E.SET)?this.initializeAccessor(c,n):this.initializeMethod(c,n);break;default:throw new Error("interface member expected")}}this.checkInternalDecorators(n,e)}},r.prototype.initializeNamespace=function(e,t,r){void 0===r&&(r=null);var n=e.fileLevelInternalName,i=e.name.text,a=this.elementsLookup.get(n);if(a||((a=new A(this,i,n,e)).namespace=r,this.elementsLookup.set(n,a),this.checkInternalDecorators(a,e)),r){if(r.members){if(r.members.has(i))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else r.members=new Map;r.members.set(i,a),r.is(E.MODULE_EXPORT)&&a.is(E.EXPORT)&&a.set(E.MODULE_EXPORT)}else if(a.is(E.EXPORT)){var o=this.fileLevelExports.get(n);if(o?(o.is(E.EXPORT)||this.error(s.DiagnosticCode.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local,e.name.range,a.internalName),a=o):this.fileLevelExports.set(n,a),e.range.source.isEntry){if(this.moduleLevelExports.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n);a.set(E.MODULE_EXPORT),this.moduleLevelExports.set(n,a)}}for(var c=e.members,u=0,l=c.length;u<l;++u)switch(c[u].kind){case p.NodeKind.CLASSDECLARATION:this.initializeClass(c[u],t,a);break;case p.NodeKind.ENUMDECLARATION:this.initializeEnum(c[u],a);break;case p.NodeKind.FUNCTIONDECLARATION:this.initializeFunction(c[u],a);break;case p.NodeKind.INTERFACEDECLARATION:this.initializeInterface(c[u],a);break;case p.NodeKind.NAMESPACEDECLARATION:this.initializeNamespace(c[u],t,a);break;case p.NodeKind.TYPEDECLARATION:this.error(s.DiagnosticCode.Operation_not_supported,c[u].range);break;case p.NodeKind.VARIABLE:this.initializeVariables(c[u],a);break;default:throw new Error("namespace member expected")}},r.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(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=new _;n.typeParameters=e.typeParameters,n.type=e.type,this.typeAliases.set(r,n)}},r.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],o=a.fileLevelInternalName;if(this.elementsLookup.has(o))this.error(s.DiagnosticCode.Duplicate_identifier_0,a.name.range,o);else{var p=a.name.text,u=new C(this,p,o,a,c.Type.void);if(u.namespace=t,this.elementsLookup.set(o,u),t){if(t.members){if(t.members.has(p)){this.error(s.DiagnosticCode.Duplicate_identifier_0,a.name.range,o);continue}}else t.members=new Map;t.members.set(p,u),t.is(E.MODULE_EXPORT)&&u.is(E.EXPORT)&&u.set(E.MODULE_EXPORT)}else 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m.set(i).withTarget(a,r);if(a.kind==g.CLASS_PROTOTYPE){if(!a.basePrototype)break;a=a.basePrototype}else{if(a.kind!=g.CLASS)break;if(!a.base)break;a=a.base}}break;default:if(a.members&&(i=a.members.get(o)))return m.set(i).withTarget(a,r)}return this.error(s.DiagnosticCode.Property_0_does_not_exist_on_type_1,e.property.range,o,a.internalName),null},r.prototype.resolveElementAccess=function(e,t){var r=e.expression;if(!(m=this.resolveExpression(r,t)))return null;var n=m.element;switch(n.kind){case g.GLOBAL:case g.LOCAL:case g.FIELD:var i=n.type;if(i.classType){var a=(n=i.classType).prototype.fnIndexedGet,o=void 0;if(null!=a&&n.members&&(o=n.members.get(a))&&o.kind==g.FUNCTION_PROTOTYPE)return m.set(o).withTarget(i.classType,r)}}return this.error(s.DiagnosticCode.Index_signature_is_missing_in_type_0,r.range,n.internalName),null},r.prototype.resolveExpression=function(e,t){for(;e.kind==p.NodeKind.PARENTHESIZED;)e=e.expression;switch(e.kind){case p.NodeKind.ASSERTION:var 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f=function(){function e(e,t,r){this.flags=E.NONE,this.members=null,this.namespace=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}();t.Element=f;var A=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=g.NAMESPACE,a.declaration=i,a.flags=i.flags,a}return i(t,e),t}(f);t.Namespace=A;var I=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=g.ENUM,a.declaration=i,a.flags=i.flags,a}return i(t,e),t}(f);t.Enum=I;var v=function(e){function t(t,r,n,i,a){var o=e.call(this,r,n,i)||this;return o.kind=g.ENUMVALUE,o.constantValue=0,o.enum=t,o.declaration=a,o}return i(t,e),t}(f);t.EnumValue=v,function(e){e[e.NONE=0]="NONE",e[e.INTEGER=1]="INTEGER",e[e.FLOAT=2]="FLOAT"}(t.ConstantValueKind||(t.ConstantValueKind={}));var N=function(e){function t(){var 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n=null;return!this.is(E.GENERIC)||(assert(null!=e&&0!=e.length),n=this.program.resolveTypeArguments(assert(this.declaration.typeParameters),e,t,r))?this.resolve(n,t):null},t.prototype.resolveBuiltinTypeArguments=function(e,t){assert(this.is(E.BUILTIN));var r=null;if(e){var n=e.length;r=new Array(n);for(var i=0;i<n;++i){var a=this.program.resolveType(e[i],t,!0);if(!a)return null;r[i]=a}}return r},t.prototype.toString=function(){return this.simpleName},t}(f);t.FunctionPrototype=O;var L=function(e){function t(t,r,n,i){void 0===i&&(i=null);var s,c,p=e.call(this,t.program,t.simpleName,r)||this;if(p.kind=g.FUNCTION,p.locals=new Map,p.additionalLocals=[],p.breakContext=null,p.debugLocations=null,p.ref=0,p.functionTableIndex=-1,p.trampoline=null,p.nextBreakId=0,p.breakStack=null,p.tempI32s=null,p.tempI64s=null,p.tempF32s=null,p.tempF64s=null,p.prototype=t,p.signature=n,p.memberOf=i,p.flags=t.flags,!t.is(E.BUILTIN)&&!t.is(E.DECLARE)){var 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i=l(e),a=l(t),o=l(r);try{return _BinaryenAddFunctionImport(this.ref,i,a,o,n)}finally{free_memory(o),free_memory(a),free_memory(i)}},e.prototype.addTableImport=function(e,t,r){var n=l(e),i=l(t),a=l(r);try{return _BinaryenAddTableImport(this.ref,n,i,a)}finally{free_memory(a),free_memory(i),free_memory(n)}},e.prototype.addMemoryImport=function(e,t,r){var n=l(e),i=l(t),a=l(r);try{return _BinaryenAddMemoryImport(this.ref,n,i,a)}finally{free_memory(a),free_memory(i),free_memory(n)}},e.prototype.addGlobalImport=function(e,t,r,n){var i=l(e),a=l(t),o=l(r);try{return _BinaryenAddGlobalImport(this.ref,i,a,o,n)}finally{free_memory(o),free_memory(a),free_memory(i)}},e.prototype.removeImport=function(e){var t=l(e);try{_BinaryenRemoveImport(this.ref,t)}finally{free_memory(t)}},e.prototype.setMemory=function(e,t,r,n,i){void 0===i&&(i=null);for(var o=l(i),s=r.length,c=new Array(s),h=new Array(s),_=new Array(s),d=0;d<s;++d){var y=r[d].buffer,m=r[d].offset;c[d]=p(y),h[d]=n==a.Target.WASM64?this.createI64(i64_low(m),i64_high(m)):this.createI32(i64_low(m)),_[d]=y.length}var g=u(c),E=u(h),T=u(_);try{_BinaryenSetMemory(this.ref,e,t,o,g,E,T,s)}finally{free_memory(T),free_memory(E),free_memory(g);for(d=s-1;d>=0;--d)free_memory(c[d]);free_memory(o)}},e.prototype.setFunctionTable=function(e){var t=u(e);try{_BinaryenSetFunctionTable(this.ref,t,e.length)}finally{free_memory(t)}},e.prototype.setStart=function(e){_BinaryenSetStart(this.ref,e)},e.prototype.setOptimizeLevel=function(e){void 0===e&&(e=2),_BinaryenSetOptimizeLevel(e)},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 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a.TYPE:return!0;default:return!1}}!function(e){e[e.ABSTRACT=0]="ABSTRACT",e[e.AS=1]="AS",e[e.ASYNC=2]="ASYNC",e[e.AWAIT=3]="AWAIT",e[e.BREAK=4]="BREAK",e[e.CASE=5]="CASE",e[e.CATCH=6]="CATCH",e[e.CLASS=7]="CLASS",e[e.CONST=8]="CONST",e[e.CONTINUE=9]="CONTINUE",e[e.CONSTRUCTOR=10]="CONSTRUCTOR",e[e.DEBUGGER=11]="DEBUGGER",e[e.DECLARE=12]="DECLARE",e[e.DEFAULT=13]="DEFAULT",e[e.DELETE=14]="DELETE",e[e.DO=15]="DO",e[e.ELSE=16]="ELSE",e[e.ENUM=17]="ENUM",e[e.EXPORT=18]="EXPORT",e[e.EXTENDS=19]="EXTENDS",e[e.FALSE=20]="FALSE",e[e.FINALLY=21]="FINALLY",e[e.FOR=22]="FOR",e[e.FROM=23]="FROM",e[e.FUNCTION=24]="FUNCTION",e[e.GET=25]="GET",e[e.IF=26]="IF",e[e.IMPLEMENTS=27]="IMPLEMENTS",e[e.IMPORT=28]="IMPORT",e[e.IN=29]="IN",e[e.INSTANCEOF=30]="INSTANCEOF",e[e.INTERFACE=31]="INTERFACE",e[e.IS=32]="IS",e[e.KEYOF=33]="KEYOF",e[e.LET=34]="LET",e[e.MODULE=35]="MODULE",e[e.NAMESPACE=36]="NAMESPACE",e[e.NEW=37]="NEW",e[e.NULL=38]="NULL",e[e.OF=39]="OF",e[e.PACKAGE=40]="PACKAGE",e[e.PRIVATE=41]="PRIVATE",e[e.PROTECTED=42]="PROTECTED",e[e.PUBLIC=43]="PUBLIC",e[e.READONLY=44]="READONLY",e[e.RETURN=45]="RETURN",e[e.SET=46]="SET",e[e.STATIC=47]="STATIC",e[e.SUPER=48]="SUPER",e[e.SWITCH=49]="SWITCH",e[e.THIS=50]="THIS",e[e.THROW=51]="THROW",e[e.TRUE=52]="TRUE",e[e.TRY=53]="TRY",e[e.TYPE=54]="TYPE",e[e.TYPEOF=55]="TYPEOF",e[e.VAR=56]="VAR",e[e.VOID=57]="VOID",e[e.WHILE=58]="WHILE",e[e.WITH=59]="WITH",e[e.YIELD=60]="YIELD",e[e.OPENBRACE=61]="OPENBRACE",e[e.CLOSEBRACE=62]="CLOSEBRACE",e[e.OPENPAREN=63]="OPENPAREN",e[e.CLOSEPAREN=64]="CLOSEPAREN",e[e.OPENBRACKET=65]="OPENBRACKET",e[e.CLOSEBRACKET=66]="CLOSEBRACKET",e[e.DOT=67]="DOT",e[e.DOT_DOT_DOT=68]="DOT_DOT_DOT",e[e.SEMICOLON=69]="SEMICOLON",e[e.COMMA=70]="COMMA",e[e.LESSTHAN=71]="LESSTHAN",e[e.GREATERTHAN=72]="GREATERTHAN",e[e.LESSTHAN_EQUALS=73]="LESSTHAN_EQUALS",e[e.GREATERTHAN_EQUALS=74]="GREATERTHAN_EQUALS",e[e.EQUALS_EQUALS=75]="EQUALS_EQUALS",e[e.EXCLAMATION_EQUALS=76]="EXCLAMATION_EQUALS",e[e.EQUALS_EQUALS_EQUALS=77]="EQUALS_EQUALS_EQUALS",e[e.EXCLAMATION_EQUALS_EQUALS=78]="EXCLAMATION_EQUALS_EQUALS",e[e.EQUALS_GREATERTHAN=79]="EQUALS_GREATERTHAN",e[e.PLUS=80]="PLUS",e[e.MINUS=81]="MINUS",e[e.ASTERISK_ASTERISK=82]="ASTERISK_ASTERISK",e[e.ASTERISK=83]="ASTERISK",e[e.SLASH=84]="SLASH",e[e.PERCENT=85]="PERCENT",e[e.PLUS_PLUS=86]="PLUS_PLUS",e[e.MINUS_MINUS=87]="MINUS_MINUS",e[e.LESSTHAN_LESSTHAN=88]="LESSTHAN_LESSTHAN",e[e.GREATERTHAN_GREATERTHAN=89]="GREATERTHAN_GREATERTHAN",e[e.GREATERTHAN_GREATERTHAN_GREATERTHAN=90]="GREATERTHAN_GREATERTHAN_GREATERTHAN",e[e.AMPERSAND=91]="AMPERSAND",e[e.BAR=92]="BAR",e[e.CARET=93]="CARET",e[e.EXCLAMATION=94]="EXCLAMATION",e[e.TILDE=95]="TILDE",e[e.AMPERSAND_AMPERSAND=96]="AMPERSAND_AMPERSAND",e[e.BAR_BAR=97]="BAR_BAR",e[e.QUESTION=98]="QUESTION",e[e.COLON=99]="COLON",e[e.EQUALS=100]="EQUALS",e[e.PLUS_EQUALS=101]="PLUS_EQUALS",e[e.MINUS_EQUALS=102]="MINUS_EQUALS",e[e.ASTERISK_EQUALS=103]="ASTERISK_EQUALS",e[e.ASTERISK_ASTERISK_EQUALS=104]="ASTERISK_ASTERISK_EQUALS",e[e.SLASH_EQUALS=105]="SLASH_EQUALS",e[e.PERCENT_EQUALS=106]="PERCENT_EQUALS",e[e.LESSTHAN_LESSTHAN_EQUALS=107]="LESSTHAN_LESSTHAN_EQUALS",e[e.GREATERTHAN_GREATERTHAN_EQUALS=108]="GREATERTHAN_GREATERTHAN_EQUALS",e[e.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS=109]="GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS",e[e.AMPERSAND_EQUALS=110]="AMPERSAND_EQUALS",e[e.BAR_EQUALS=111]="BAR_EQUALS",e[e.CARET_EQUALS=112]="CARET_EQUALS",e[e.AT=113]="AT",e[e.IDENTIFIER=114]="IDENTIFIER",e[e.STRINGLITERAL=115]="STRINGLITERAL",e[e.INTEGERLITERAL=116]="INTEGERLITERAL",e[e.FLOATLITERAL=117]="FLOATLITERAL",e[e.INVALID=118]="INVALID",e[e.ENDOFFILE=119]="ENDOFFILE"}(a=t.Token||(t.Token={})),t.tokenFomKeyword=p,t.tokenIsAlsoIdentifier=u,t.operatorTokenToString=function(e){switch(e){case a.DELETE:return"delete";case a.IN:return"in";case a.INSTANCEOF:return"instanceof";case a.NEW:return"new";case a.TYPEOF:return"typeof";case a.VOID:return"void";case a.YIELD:return"yield";case a.DOT_DOT_DOT:return"...";case a.COMMA:return",";case a.LESSTHAN:return"<";case a.GREATERTHAN:return">";case a.LESSTHAN_EQUALS:return"<=";case a.GREATERTHAN_EQUALS:return">=";case a.EQUALS_EQUALS:return"==";case a.EXCLAMATION_EQUALS:return"!=";case a.EQUALS_EQUALS_EQUALS:return"===";case a.EXCLAMATION_EQUALS_EQUALS:return"!==";case a.PLUS:return"+";case a.MINUS:return"-";case a.ASTERISK_ASTERISK:return"**";case a.ASTERISK:return"*";case a.SLASH:return"/";case a.PERCENT:return"%";case a.PLUS_PLUS:return"++";case a.MINUS_MINUS:return"--";case a.LESSTHAN_LESSTHAN:return"<<";case a.GREATERTHAN_GREATERTHAN:return">>";case a.GREATERTHAN_GREATERTHAN_GREATERTHAN:return">>>";case a.AMPERSAND:return"&";case a.BAR:return"|";case a.CARET:return"^";case a.EXCLAMATION:return"!";case a.TILDE:return"~";case a.AMPERSAND_AMPERSAND:return"&&";case a.BAR_BAR:return"||";case a.EQUALS:return"=";case a.PLUS_EQUALS:return"+=";case a.MINUS_EQUALS:return"-=";case a.ASTERISK_EQUALS:return"*=";case a.ASTERISK_ASTERISK_EQUALS:return"**=";case a.SLASH_EQUALS:return"/=";case a.PERCENT_EQUALS:return"%=";case a.LESSTHAN_LESSTHAN_EQUALS:return"<<=";case a.GREATERTHAN_GREATERTHAN_EQUALS:return">>=";case a.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:return">>>=";case a.AMPERSAND_EQUALS:return"&=";case a.BAR_EQUALS:return"|=";case a.CARET_EQUALS:return"^=";default:return assert(!1),""}};var l=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=l;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 i(t,e),t.prototype.next=function(e){return void 0===e&&(e=!1),this.nextToken=-1,this.token=this.unsafeNext(e)},t.prototype.unsafeNext=function(e,t){void 0===e&&(e=!1),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:++this.pos<this.end&&10==r.charCodeAt(this.pos)&&++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,a.EXCLAMATION_EQUALS_EQUALS):a.EXCLAMATION_EQUALS):a.EXCLAMATION;case 34:case 39:case 96:return a.STRINGLITERAL;case 37:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,a.PERCENT_EQUALS):a.PERCENT;case 38:if(++this.pos,t>1&&this.pos<this.end){if(38==r.charCodeAt(this.pos))return++this.pos,a.AMPERSAND_AMPERSAND;if(61==r.charCodeAt(this.pos))return++this.pos,a.AMPERSAND_EQUALS}return a.AMPERSAND;case 40:return++this.pos,a.OPENPAREN;case 41:return++this.pos,a.CLOSEPAREN;case 42:if(++this.pos,t>1&&this.pos<this.end){if(61==r.charCodeAt(this.pos))return++this.pos,a.ASTERISK_EQUALS;if(42==r.charCodeAt(this.pos))return++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,a.ASTERISK_ASTERISK_EQUALS):a.ASTERISK_ASTERISK}return a.ASTERISK;case 43:if(++this.pos,t>1&&this.pos<this.end){if(43==r.charCodeAt(this.pos))return++this.pos,a.PLUS_PLUS;if(61==r.charCodeAt(this.pos))return++this.pos,a.PLUS_EQUALS}return a.PLUS;case 44:return++this.pos,a.COMMA;case 45:if(++this.pos,t>1&&this.pos<this.end){if(45==r.charCodeAt(this.pos))return++this.pos,a.MINUS_MINUS;if(61==r.charCodeAt(this.pos))return++this.pos,a.MINUS_EQUALS}return a.MINUS;case 46:if(++this.pos,t>1&&this.pos<this.end){if(c.isDecimalDigit(r.charCodeAt(this.pos)))return--this.pos,a.FLOATLITERAL;if(t>2&&this.pos+1<this.end&&46==r.charCodeAt(this.pos)&&46==r.charCodeAt(this.pos+1))return this.pos+=2,a.DOT_DOT_DOT}return a.DOT;case 47:var i=this.pos;if(++this.pos,t>1&&this.pos<this.end){if(47==r.charCodeAt(this.pos)){var l=s.CommentKind.LINE;for(this.pos+1<this.end&&47==r.charCodeAt(this.pos+1)&&(++this.pos,l=s.CommentKind.TRIPLE);++this.pos<this.end;)if(10==r.charCodeAt(this.pos)){++this.pos;break}this.onComment&&this.onComment(l,r.substring(i,this.pos),this.range(i,this.pos));break}if(42==r.charCodeAt(this.pos)){for(var h=!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,h=!0;break}h?this.onComment&&this.onComment(s.CommentKind.BLOCK,r.substring(i,this.pos),this.range(i,this.pos)):this.error(o.DiagnosticCode._0_expected,this.range(this.pos),"*/");break}if(61==r.charCodeAt(this.pos))return++this.pos,a.SLASH_EQUALS}return a.SLASH;case 48:case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:return this.testInteger()?a.INTEGERLITERAL:a.FLOATLITERAL;case 58:return++this.pos,a.COLON;case 59:return++this.pos,a.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,a.LESSTHAN_LESSTHAN_EQUALS):a.LESSTHAN_LESSTHAN;if(61==r.charCodeAt(this.pos))return++this.pos,a.LESSTHAN_EQUALS}return a.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,a.EQUALS_EQUALS_EQUALS):a.EQUALS_EQUALS;if(62==r.charCodeAt(this.pos))return++this.pos,a.EQUALS_GREATERTHAN}return a.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,a.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS):a.GREATERTHAN_GREATERTHAN_GREATERTHAN;if(61==r.charCodeAt(this.pos))return++this.pos,a.GREATERTHAN_GREATERTHAN_EQUALS}return a.GREATERTHAN_GREATERTHAN}if(61==r.charCodeAt(this.pos))return++this.pos,a.GREATERTHAN_EQUALS}return a.GREATERTHAN;case 63:return++this.pos,a.QUESTION;case 91:return++this.pos,a.OPENBRACKET;case 93:return++this.pos,a.CLOSEBRACKET;case 94:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,a.CARET_EQUALS):a.CARET;case 123:return++this.pos,a.OPENBRACE;case 124:if(++this.pos,t>1&&this.pos<this.end){if(124==r.charCodeAt(this.pos))return++this.pos,a.BAR_BAR;if(61==r.charCodeAt(this.pos))return++this.pos,a.BAR_EQUALS}return a.BAR;case 125:return++this.pos,a.CLOSEBRACE;case 126:return++this.pos,a.TILDE;case 64:return++this.pos,a.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=_,a.IDENTIFIER;var d=p(r.substring(_,this.pos));if(!(d==a.INVALID||e&&u(d)))return d;this.pos=_}return a.IDENTIFIER}if(c.isWhiteSpace(n)){++this.pos;break}return this.error(o.DiagnosticCode.Invalid_character,this.range(this.pos,this.pos+1)),++this.pos,a.INVALID}}return a.ENDOFFILE},t.prototype.peek=function(e,t,r){void 0===e&&(e=!1),void 0===t&&(t=!1),void 0===r&&(r=i32.MAX_VALUE);var n=this.source.text;if(this.nextToken<0){var i=this.pos,a=this.token,o=this.tokenPos;if(this.nextToken=this.unsafeNext(t,r),this.nextTokenPos=this.tokenPos,e)for(this.nextTokenOnNewLine=!1;--this.tokenPos>i;)if(c.isLineBreak(n.charCodeAt(this.tokenPos))){this.nextTokenOnNewLine=!0;break}this.pos=i,this.token=a,this.tokenPos=o}return this.nextToken},t.prototype.skip=function(e){var t=this.pos,r=this.token,n=this.tokenPos,i=i32.MAX_VALUE;switch(e){case a.GREATERTHAN:i=1}return this.token=this.unsafeNext(e==a.IDENTIFIER,i),this.token==e?(this.nextToken=-1,!0):(this.pos=t,this.token=r,this.tokenPos=n,!1)},t.prototype.mark=function(){var e;return d?(e=d,d=null):e=new _,e.pos=this.pos,e.token=this.token,e.tokenPos=this.tokenPos,e},t.prototype.discard=function(e){d=e},t.prototype.reset=function(e){this.pos=e.pos,this.token=e.token,this.tokenPos=e.tokenPos,this.nextToken=-1,d=e},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 l(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(o.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(o.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(o.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(o.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(o.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(o.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)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 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i=e.charCodeAt(this.pos);if(!(i>=48&&i<=57))break;r=i64_add(i64_mul(r,n),i64_new(i-48,0)),++this.pos}return this.pos==t&&this.error(o.DiagnosticCode.Digit_expected,this.range(t)),r},t.prototype.readOctalInteger=function(){for(var e=this.source.text,t=this.pos,r=i64_new(0,0),n=i64_new(8,0);this.pos<this.end;){var i=e.charCodeAt(this.pos);if(!(i>=48&&i<=55))break;r=i64_add(i64_mul(r,n),i64_new(i-48,0)),++this.pos}return this.pos==t&&this.error(o.DiagnosticCode.Octal_digit_expected,this.range(t)),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);this.pos<this.end;){var a=e.charCodeAt(this.pos);if(48==a)r=i64_mul(r,n);else{if(49!=a)break;r=i64_add(i64_mul(r,n),i)}++this.pos}return this.pos==t&&this.error(o.DiagnosticCode.Binary_digit_expected,this.range(t)),r},t.prototype.readFloat=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.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(o.DiagnosticCode.Hexadecimal_digit_expected,this.range(this.pos-1,this.pos)),"";t=16*t+10+n-97}if(0==--e)break}return 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e=[],t=this.thisType;t&&e.push(t.toSignatureString());for(var r=this.parameterTypes,n=0,i=r.length;n<i;++n)e.push(r[n].toSignatureString());return e.push(this.returnType.toSignatureString()),e.join("")},e.prototype.toString=function(e){void 0===e&&(e=!1);var t=new Array;t.push("(");var r=0,n=this.thisType;n&&e&&(t.push("this: "),t.push(n.toString()),r=1);var i=this.parameterTypes,a=i.length;if(a)for(var o=this.parameterNames,c=o?o.length:0,p=this.requiredParameters,u=this.hasRest?a-1:-1,l=0;l<a;++l,++r)r&&t.push(", "),l==u&&t.push("..."),l<c?t.push(o[l]):t.push(s(l)),l>=p&&l!=u?t.push("?: "):t.push(": "),t.push(i[l].toString());return t.push(") => "),t.push(this.returnType.toString()),t.join("")},e}();t.Signature=a;var o=null;function s(e){o||(o=[]);for(var t=o.length;t<=e;++t)o.push("arg$"+t.toString(10));return o[e-1]}t.getGenericParameterName=s},function(e,t,r){"use strict";var n,i=this&&this.__extends||(n=Object.setPrototypeOf||{__proto__:[]}instanceof 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y=i64_shr_u(i64_align(d,65536),i64_new(16,0));t.setMemory(i64_low(y),this.options.isWasm64?p.Module.MAX_MEMORY_WASM64:p.Module.MAX_MEMORY_WASM32,this.memorySegments,e.target,"memory")}e.importMemory&&t.addMemoryImport("0","env","memory");var m=this.functionTable,g=m.length;if(g){var E=new Array(g);for(o=0;o<g;++o)E[o]=m[o].ref;t.setFunctionTable(E)}return t},t.prototype.compileSourceByPath=function(e,t){for(var r=this.program.sources,n=e+".ts",i=0,a=r.length;i<a;++i){if((o=r[i]).normalizedPath==n)return void this.compileSource(o)}n=e+"/index.ts";for(i=0,a=r.length;i<a;++i){if((o=r[i]).normalizedPath==n)return void this.compileSource(o)}n=u.LIBRARY_PREFIX+e+".ts";for(i=0,a=r.length;i<a;++i){var o;if((o=r[i]).normalizedPath==n)return void this.compileSource(o)}this.error(c.DiagnosticCode.File_0_not_found,t.range,e)},t.prototype.compileSource=function(e){var t=this.files,r=e.normalizedPath;if(!t.has(r)){t.add(r);for(var n=this.options.noTreeShaking,i=e.isEntry,a=this.startFunction,o=this.startFunctionBody,s=e.statements,c=0,p=s.length;c<p;++c){var l=s[c];switch(l.kind){case h.NodeKind.CLASSDECLARATION:(n||i&&l.is(u.CommonFlags.EXPORT))&&!l.isGeneric&&this.compileClassDeclaration(l,[]);break;case h.NodeKind.ENUMDECLARATION:(n||i&&l.is(u.CommonFlags.EXPORT))&&this.compileEnumDeclaration(l);break;case h.NodeKind.FUNCTIONDECLARATION:(n||i&&l.is(u.CommonFlags.EXPORT))&&!l.isGeneric&&this.compileFunctionDeclaration(l,[]);break;case h.NodeKind.IMPORT:this.compileSourceByPath(l.normalizedPath,l.path);break;case h.NodeKind.NAMESPACEDECLARATION:(n||i&&l.is(u.CommonFlags.EXPORT))&&this.compileNamespaceDeclaration(l);break;case h.NodeKind.VARIABLE:var _=this.compileVariableStatement(l);_&&o.push(_);break;case h.NodeKind.EXPORT:null!=l.normalizedPath&&this.compileSourceByPath(l.normalizedPath,l.path),(n||i)&&this.compileExportStatement(l);break;default:var d=this.currentFunction;this.currentFunction=a,o.push(this.compileStatement(l)),this.currentFunction=d}}}},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(u.CommonFlags.COMPILED)||e.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN))return!0;e.set(u.CommonFlags.COMPILED);var t=this.module,r=e.declaration,n=0;if(e.type==_.Type.void)if(r.type){var i=this.program.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.compileExpression(r.initializer,_.Type.void,0),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}var a=e.type.toNativeType(),o=e.isAny(u.CommonFlags.CONST)||e.is(u.CommonFlags.STATIC|u.CommonFlags.READONLY);if(e.is(u.CommonFlags.AMBIENT))return o?(e.set(u.CommonFlags.MODULE_IMPORT),t.addGlobalImport(e.internalName,e.namespace?e.namespace.simpleName:"env",e.simpleName,a),e.set(u.CommonFlags.COMPILED),!0):(this.error(c.DiagnosticCode.Operation_not_supported,r.range),!1);var s=!1;e.is(u.CommonFlags.INLINED)?n=this.compileInlineConstant(e,e.type,!0):r.initializer?(n||(n=this.compileExpression(r.initializer,e.type)),_BinaryenExpressionGetId(n)!=p.ExpressionId.Const&&(o?(n=this.precomputeExpressionRef(n),_BinaryenExpressionGetId(n)!=p.ExpressionId.Const&&(this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,r.range),s=!0)):s=!0)):n=e.type.toNativeZero(t);var l=e.internalName;if(s)t.addGlobal(l,a,!0,e.type.toNativeZero(t)),this.startFunctionBody.push(t.createSetGlobal(l,n));else if(o){switch(_BinaryenExpressionGetType(n)){case p.NativeType.I32:e.constantValueKind=1,e.constantIntegerValue=i64_new(_BinaryenConstGetValueI32(n),0);break;case p.NativeType.I64:e.constantValueKind=1,e.constantIntegerValue=i64_new(_BinaryenConstGetValueI64Low(n),_BinaryenConstGetValueI64High(n));break;case p.NativeType.F32:e.constantValueKind=2,e.constantFloatValue=_BinaryenConstGetValueF32(n);break;case p.NativeType.F64:e.constantValueKind=2,e.constantFloatValue=_BinaryenConstGetValueF64(n);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.declaration.range),e.constantValueKind=1,e.constantIntegerValue=i64_new(0)}e.set(u.CommonFlags.INLINED),r.isTopLevel&&t.addGlobal(l,a,!1,n),r.range.source.isEntry&&r.isTopLevelExport&&t.addGlobalExport(e.internalName,r.programLevelInternalName)}else t.addGlobal(l,a,!o,n);return!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){if(e.is(u.CommonFlags.COMPILED))return!0;e.set(u.CommonFlags.COMPILED);var t=this.module;this.currentEnum=e;var r,n,i=null;if(e.members)try{for(var o=a(e.members.values()),s=o.next();!s.done;s=o.next()){var l=s.value;if(l.kind==u.ElementKind.ENUMVALUE){var h=!1,d=l,y=d.declaration;if(d.set(u.CommonFlags.COMPILED),d.is(u.CommonFlags.INLINED))e.declaration.isTopLevelExport&&t.addGlobal(d.internalName,p.NativeType.I32,!1,t.createI32(d.constantValue));else{var m=void 0;y.value?(m=this.compileExpression(y.value,_.Type.i32),_BinaryenExpressionGetId(m)!=p.ExpressionId.Const&&(m=this.precomputeExpressionRef(m),_BinaryenExpressionGetId(m)!=p.ExpressionId.Const&&(e.is(u.CommonFlags.CONST)&&this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,y.range),h=!0))):null==i?m=t.createI32(0):i.is(u.CommonFlags.INLINED)?m=t.createI32(i.constantValue+1):(m=t.createBinary(p.BinaryOp.AddI32,t.createGetGlobal(i.internalName,p.NativeType.I32),t.createI32(1)),e.is(u.CommonFlags.CONST)&&this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,y.range),h=!0),h?(t.addGlobal(d.internalName,p.NativeType.I32,!0,t.createI32(0)),this.startFunctionBody.push(t.createSetGlobal(d.internalName,m))):(t.addGlobal(d.internalName,p.NativeType.I32,!1,m),_BinaryenExpressionGetType(m)==p.NativeType.I32?(d.constantValue=_BinaryenConstGetValueI32(m),d.set(u.CommonFlags.INLINED)):(assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,y.range),d.constantValue=0))}i=d,e.declaration.range.source.isEntry&&e.declaration.isTopLevelExport&&(l.is(u.CommonFlags.INLINED)?t.addGlobalExport(l.internalName,l.internalName):y&&this.warning(c.DiagnosticCode.Cannot_export_a_mutable_global,y.range))}}}catch(e){r={error:e}}finally{try{s&&!s.done&&(n=o.return)&&n.call(o)}finally{if(r)throw r.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,n.declaration.name)},t.prototype.compileFunctionUsingTypeArguments=function(e,t,r,n){var i=e.resolveUsingTypeArguments(t,r,n);return i&&this.compileFunction(i)?i:null},t.prototype.ensureFunctionType=function(e){var t,r=e.parameterTypes.length,n=e.thisType,i=0;n?((t=new Array(1+r))[0]=n.toNativeType(),i=1):t=new Array(r);for(var a=0;a<r;++a,++i)t[i]=e.parameterTypes[a].toNativeType();var o=e.returnType.toNativeType(),s=this.module,c=s.getFunctionTypeBySignature(o,t);return c||(c=s.addFunctionType(e.toSignatureString(),o,t)),c},t.prototype.compileFunction=function(e){if(e.is(u.CommonFlags.COMPILED))return!0;assert(!e.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN)||"abort"==e.simpleName),e.set(u.CommonFlags.COMPILED);var t,r=e.prototype.declaration,n=r.body;n?e.is(u.CommonFlags.AMBIENT)&&this.error(c.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,r.name.range):e.is(u.CommonFlags.AMBIENT)||this.error(c.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,r.name.range);var i=this.ensureFunctionType(e.signature),a=this.module;if(n){var o=e.signature.returnType,s=this.currentFunction;this.currentFunction=e;var p=e.flow,l=void 0;if(n.kind==h.NodeKind.EXPRESSION)assert(e.is(u.CommonFlags.ARROW)),l=this.compileExpression(n.expression,o),p.set(1);else{assert(n.kind==h.NodeKind.BLOCK),l=this.compileStatement(n);var d=p.finalize();o==_.Type.void||d||this.error(c.DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,r.signature.returnType.range)}this.currentFunction=s,t=a.addFunction(e.internalName,i,_.typesToNativeTypes(e.additionalLocals),l)}else{e.set(u.CommonFlags.MODULE_IMPORT);var y=e.prototype.namespace;t=a.addFunctionImport(e.internalName,y?y.simpleName:"env",e.simpleName,i)}return r.range.source.isEntry&&r.isTopLevelExport&&a.addFunctionExport(e.internalName,r.name.text),e.finalize(a,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 h.NodeKind.CLASSDECLARATION:!r&&!a.is(u.CommonFlags.EXPORT)||a.isGeneric||this.compileClassDeclaration(a,[]);break;case h.NodeKind.INTERFACEDECLARATION:!r&&!a.is(u.CommonFlags.EXPORT)||a.isGeneric||this.compileInterfaceDeclaration(a,[]);break;case h.NodeKind.ENUMDECLARATION:(r||a.is(u.CommonFlags.EXPORT))&&this.compileEnumDeclaration(a);break;case h.NodeKind.FUNCTIONDECLARATION:!r&&!a.is(u.CommonFlags.EXPORT)||a.isGeneric||this.compileFunctionDeclaration(a,[]);break;case h.NodeKind.NAMESPACEDECLARATION:(r||a.is(u.CommonFlags.EXPORT))&&this.compileNamespaceDeclaration(a);break;case h.NodeKind.VARIABLE:if(r||a.is(u.CommonFlags.EXPORT)){var o=this.compileVariableStatement(a,!0);o&&this.startFunctionBody.push(o)}break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,a.range)}}},t.prototype.compileNamespace=function(e){if(e.members){var t,r,n=this.options.noTreeShaking;try{for(var i=a(e.members.values()),o=i.next();!o.done;o=i.next()){var s=o.value;switch(s.kind){case u.ElementKind.CLASS_PROTOTYPE:!n&&!s.is(u.CommonFlags.EXPORT)||s.is(u.CommonFlags.GENERIC)||this.compileClassUsingTypeArguments(s,[]);break;case u.ElementKind.ENUM:this.compileEnum(s);break;case u.ElementKind.FUNCTION_PROTOTYPE:!n&&!s.is(u.CommonFlags.EXPORT)||s.is(u.CommonFlags.GENERIC)||this.compileFunctionUsingTypeArguments(s,[],null,s.declaration.name);break;case u.ElementKind.GLOBAL:this.compileGlobal(s);break;case u.ElementKind.NAMESPACE:this.compileNamespace(s)}}}catch(e){t={error:e}}finally{try{o&&!o.done&&(r=i.return)&&r.call(i)}finally{if(t)throw t.error}}}},t.prototype.compileExportStatement=function(e){for(var t=this.module,r=this.program.fileLevelExports,n=e.members,i=0,a=n.length;i<a;++i){var o=n[i],s=e.range.source.internalPath+u.PATH_DELIMITER+o.externalName.text,p=r.get(s);if(p)switch(p.kind){case u.ElementKind.CLASS_PROTOTYPE:p.is(u.CommonFlags.GENERIC)||this.compileClassUsingTypeArguments(p,[]);break;case u.ElementKind.ENUM:this.compileEnum(p);break;case u.ElementKind.FUNCTION_PROTOTYPE:if(!p.is(u.CommonFlags.GENERIC)&&e.range.source.isEntry){var l=this.compileFunctionUsingTypeArguments(p,[],null,p.declaration.name);if(l){var h=l.prototype.declaration;h&&h.needsExplicitExport(o)&&t.addFunctionExport(l.internalName,o.externalName.text)}}break;case u.ElementKind.GLOBAL:if(this.compileGlobal(p)&&e.range.source.isEntry){var _=p.declaration;_&&_.needsExplicitExport(o)&&(p.is(u.CommonFlags.INLINED)?t.addGlobalExport(p.internalName,o.externalName.text):this.warning(c.DiagnosticCode.Cannot_export_a_mutable_global,o.range))}break;case u.ElementKind.NAMESPACE:this.compileNamespace(p)}}},t.prototype.compileClassDeclaration=function(e,t,r,n){void 0===r&&(r=null),void 0===n&&(n=null);var i=assert(this.program.elementsLookup.get(e.fileLevelInternalName));assert(i.kind==u.ElementKind.CLASS_PROTOTYPE),this.compileClassUsingTypeArguments(i,t,r,n)},t.prototype.compileClassUsingTypeArguments=function(e,t,r,n){void 0===r&&(r=null),void 0===n&&(n=null);var i=e.resolveUsingTypeArguments(t,r,n);i&&this.compileClass(i)},t.prototype.compileClass=function(e){return!!e.is(u.CommonFlags.COMPILED)||(e.set(u.CommonFlags.COMPILED),!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=p.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(u.CommonFlags.COMPILED)),e.functionTableIndex>=0)return e.functionTableIndex;var t=this.functionTable,r=t.length;return t.push(e),e.functionTableIndex=r,r},t.prototype.compileStatement=function(e){var t,r=this.module;switch(e.kind){case h.NodeKind.BLOCK:t=this.compileBlockStatement(e);break;case h.NodeKind.BREAK:t=this.compileBreakStatement(e);break;case h.NodeKind.CONTINUE:t=this.compileContinueStatement(e);break;case h.NodeKind.DO:t=this.compileDoStatement(e);break;case h.NodeKind.EMPTY:t=this.compileEmptyStatement(e);break;case h.NodeKind.EXPRESSION:t=this.compileExpressionStatement(e);break;case h.NodeKind.FOR:t=this.compileForStatement(e);break;case h.NodeKind.IF:t=this.compileIfStatement(e);break;case h.NodeKind.RETURN:t=this.compileReturnStatement(e);break;case h.NodeKind.SWITCH:t=this.compileSwitchStatement(e);break;case h.NodeKind.THROW:t=this.compileThrowStatement(e);break;case h.NodeKind.TRY:t=this.compileTryStatement(e);break;case h.NodeKind.VARIABLE:(t=this.compileVariableStatement(e))||(t=r.createNop());break;case h.NodeKind.VOID:t=this.compileVoidStatement(e);break;case h.NodeKind.WHILE:t=this.compileWhileStatement(e);break;case h.NodeKind.TYPEDECLARATION:if(this.currentFunction==this.startFunction)return r.createNop();default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),t=r.createUnreachable()}return this.options.sourceMap&&g(t,e.range,r,this.currentFunction),t},t.prototype.compileStatements=function(e){for(var t=e.length,r=new Array(t),n=0;n<t;++n)r[n]=this.compileStatement(e[n]);return r},t.prototype.compileBlockStatement=function(e){var t=e.statements,r=this.currentFunction.flow.enterBranchOrScope();this.currentFunction.flow=r;var n=this.module.createBlock(null,this.compileStatements(t),p.NativeType.None),i=r.is(1);return r=r.leaveBranchOrScope(),this.currentFunction.flow=r,i&&r.set(1),n},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(4),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(8),t.createBreak(i))},t.prototype.compileDoStatement=function(e){var t=this.currentFunction,r=t.enterBreakContext(),n=t.flow,i=n.breakLabel,a=n.continueLabel,o="break|"+r;n.breakLabel=o;var s="continue|"+r;n.continueLabel=s;var c=this.compileStatement(e.statement);n.breakLabel=i,n.continueLabel=a;var u=this.module,l=f(this.compileExpression(e.condition,_.Type.i32,0),this.currentType,u);return this.currentFunction.leaveBreakContext(),u.createBlock(o,[u.createLoop(s,u.createBlock(null,[c,u.createBreak(s,l)],p.NativeType.None))],p.NativeType.None)},t.prototype.compileEmptyStatement=function(e){return this.module.createNop()},t.prototype.compileExpressionStatement=function(e){var t=this.compileExpression(e.expression,_.Type.void,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.enterBranchOrScope();t.flow=n;var i=n.breakLabel="break|"+r;n.breakLabel=i;var a="continue|"+r;n.continueLabel=a;var o=this.module,s=e.initializer?this.compileStatement(e.initializer):o.createNop(),c=e.condition?this.compileExpression(e.condition,_.Type.i32):o.createI32(1),u=e.incrementor?this.compileExpression(e.incrementor,_.Type.void):o.createNop(),l=this.compileStatement(e.statement),h=!e.condition&&n.is(1);n=n.leaveBranchOrScope(),t.flow=n,t.leaveBreakContext();var d=o.createBlock(i,[s,o.createLoop(a,o.createBlock(null,[o.createIf(c,o.createBlock(null,[l,u,o.createBreak(a)],p.NativeType.None))],p.NativeType.None))],p.NativeType.None);return h&&(n.set(1),d=o.createBlock(null,[d,o.createUnreachable()])),d},t.prototype.compileIfStatement=function(e){var t=this.module,r=this.currentFunction,n=e.ifTrue,i=e.ifFalse,a=f(this.compileExpression(e.condition,_.Type.i32,0),this.currentType,t);if(this.currentFunction.isAny(u.CommonFlags.GENERIC|u.CommonFlags.GENERIC_CONTEXT)&&_BinaryenExpressionGetId(a=this.precomputeExpressionRef(a))==p.ExpressionId.Const&&_BinaryenExpressionGetType(a)==p.NativeType.I32){return _BinaryenConstGetValueI32(a)?this.compileStatement(n):i?this.compileStatement(i):t.createNop()}var o=r.flow.enterBranchOrScope();r.flow=o;var s=this.compileStatement(n),c=o.is(1);o=o.leaveBranchOrScope(),r.flow=o;var l=0,h=!1;return i&&(o=o.enterBranchOrScope(),r.flow=o,l=this.compileStatement(i),h=o.is(1),o=o.leaveBranchOrScope(),r.flow=o),c&&h&&o.set(1),t.createIf(a,s,l)},t.prototype.compileReturnStatement=function(e){var t=this.currentFunction,r=0;return e.value&&(r=this.compileExpression(e.value,t.signature.returnType)),t.flow.set(1),this.module.createReturn(r)},t.prototype.compileSwitchStatement=function(e){var t=this.module,r=this.currentFunction,n=r.enterBreakContext(),i=r.getTempLocal(_.Type.u32),a=i.index,o=e.cases,s=o.length,c=new Array(1+s);c[0]=t.createSetLocal(a,this.compileExpression(e.condition,_.Type.u32));for(var u=1,l=-1,h=0;h<s;++h){var d=o[h].label;d?c[u++]=t.createBreak("case"+h.toString(10)+"|"+n,t.createBinary(p.BinaryOp.EqI32,t.createGetLocal(a,p.NativeType.I32),this.compileExpression(d,_.Type.i32))):l=h}r.freeTempLocal(i),c[u]=t.createBreak((l>=0?"case"+l.toString(10):"break")+"|"+n);var y=t.createBlock("case0|"+n,c,p.NativeType.None),m=!0;for(h=0;h<s;++h){var g=o[h].statements,E=g.length,T=new Array(1+E);T[0]=y;var f=r.flow.enterBranchOrScope();r.flow=f;var A="break|"+n;f.breakLabel=A;for(var I=h!=s-1,v=I?"case"+(h+1).toString(10)+"|"+n:A,N=0;N<E;++N)T[N+1]=this.compileStatement(g[N]);I||f.is(1)||(m=!1),r.flow=f.leaveBranchOrScope(),y=t.createBlock(v,T,p.NativeType.None)}return r.leaveBreakContext(),l>=0&&m&&r.flow.set(1),y},t.prototype.compileThrowStatement=function(e){var t=this.currentFunction.flow;return t.set(2),t.set(1),this.module.createUnreachable()},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.startFunction&&e.parent&&e.parent.kind==h.NodeKind.SOURCE){for(var o=0;o<a;++o)this.compileGlobalDeclaration(i[o]);return 0}var s=new Array;for(o=0;o<a;++o){var l=i[o],d=l.name.text,y=null,m=0;if(l.type){if(!(y=r.resolveType(l.type,n.contextualTypeArguments)))continue;l.initializer&&(m=this.compileExpression(l.initializer,y))}else{if(!l.initializer){this.error(c.DiagnosticCode.Type_expected,l.name.range.atEnd);continue}if(m=this.compileExpression(l.initializer,_.Type.void,0),this.currentType==_.Type.void){this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,l.range,this.currentType.toString(),"<auto>");continue}y=this.currentType}if(l.is(u.CommonFlags.CONST))if(m){if(m=this.precomputeExpressionRef(m),_BinaryenExpressionGetId(m)==p.ExpressionId.Const){var g=new u.Local(r,d,-1,y);switch(_BinaryenExpressionGetType(m)){case p.NativeType.I32:g=g.withConstantIntegerValue(_BinaryenConstGetValueI32(m),0);break;case p.NativeType.I64:g=g.withConstantIntegerValue(_BinaryenConstGetValueI64Low(m),_BinaryenConstGetValueI64High(m));break;case p.NativeType.F32:g=g.withConstantFloatValue(_BinaryenConstGetValueF32(m));break;case p.NativeType.F64:g=g.withConstantFloatValue(_BinaryenConstGetValueF64(m));break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,l.range),this.module.createUnreachable()}var E=n.flow.scopedLocals;if(E){if(E.has(d))return this.error(c.DiagnosticCode.Duplicate_identifier_0,l.name.range,d),0}else n.flow.scopedLocals=E=new Map;return E.set(d,g),0}this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,l.range)}else this.error(c.DiagnosticCode._const_declarations_must_be_initialized,l.range);l.is(u.CommonFlags.LET)?n.flow.addScopedLocal(d,y,l.name):n.addLocal(y,d),m&&s.push(this.compileAssignmentWithValue(l.name,m))}return s.length?1==s.length?s[0]:this.module.createBlock(null,s,p.NativeType.None):0},t.prototype.compileVoidStatement=function(e){return this.compileExpression(e.expression,_.Type.void,2,!1)},t.prototype.compileWhileStatement=function(e){var t=this.module,r=f(this.compileExpression(e.condition,_.Type.i32,0),this.currentType,t);if(this.currentFunction.isAny(u.CommonFlags.GENERIC|u.CommonFlags.GENERIC_CONTEXT)&&_BinaryenExpressionGetId(r=this.precomputeExpressionRef(r))==p.ExpressionId.Const&&_BinaryenExpressionGetType(r)==p.NativeType.I32&&!_BinaryenConstGetValueI32(r))return t.createNop();var n=this.currentFunction,i=n.enterBreakContext(),a=n.flow.enterBranchOrScope();n.flow=a;var o="break|"+i;a.breakLabel=o;var s="continue|"+i;a.continueLabel=s;var c=this.compileStatement(e.statement);n.flow=a.leaveBranchOrScope(),n.leaveBreakContext();var l=t.createBlock(o,[t.createLoop(s,t.createIf(r,t.createBlock(null,[c,t.createBreak(s)],p.NativeType.None)))],p.NativeType.None);return l},t.prototype.compileInlineConstant=function(e,t,r){assert(e.is(u.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 11:return this.module.createF32(e.constantFloatValue);case 12:return this.module.createF64(e.constantFloatValue);default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.declaration.range),this.module.createUnreachable()}},t.prototype.compileExpression=function(e,t,r,n){var i;switch(void 0===r&&(r=1),void 0===n&&(n=!0),this.currentType=t,e.kind){case h.NodeKind.ASSERTION:i=this.compileAssertionExpression(e,t);break;case h.NodeKind.BINARY:i=this.compileBinaryExpression(e,t,n);break;case h.NodeKind.CALL:i=this.compileCallExpression(e,t);break;case h.NodeKind.COMMA:i=this.compileCommaExpression(e,t);break;case h.NodeKind.ELEMENTACCESS:i=this.compileElementAccessExpression(e,t);break;case h.NodeKind.FUNCTION:i=this.compileFunctionExpression(e,t);break;case h.NodeKind.IDENTIFIER:case h.NodeKind.FALSE:case h.NodeKind.NULL:case h.NodeKind.THIS:case h.NodeKind.TRUE:i=this.compileIdentifierExpression(e,t,0==r);break;case h.NodeKind.LITERAL:i=this.compileLiteralExpression(e,t);break;case h.NodeKind.NEW:i=this.compileNewExpression(e,t);break;case h.NodeKind.PARENTHESIZED:i=this.compileParenthesizedExpression(e,t,n);break;case h.NodeKind.PROPERTYACCESS:i=this.compilePropertyAccessExpression(e,t,0==r);break;case h.NodeKind.TERNARY:i=this.compileTernaryExpression(e,t);break;case h.NodeKind.UNARYPOSTFIX:i=this.compileUnaryPostfixExpression(e,t);break;case h.NodeKind.UNARYPREFIX:i=this.compileUnaryPrefixExpression(e,t,n);break;default:assert(!1),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,e),this.currentType=t),this.options.sourceMap&&g(i,e.range,this.module,this.currentFunction),i},t.prototype.compileExpressionRetainType=function(e,t,r){return void 0===r&&(r=!0),this.compileExpression(e,t==_.Type.void?_.Type.i32:t,0,r)},t.prototype.precomputeExpression=function(e,t,r){return void 0===r&&(r=1),this.precomputeExpressionRef(this.compileExpression(e,t,r))},t.prototype.precomputeExpressionRef=function(e){var t=this.module,r=this.currentType,n=r.toNativeType(),i=t.getFunctionTypeBySignature(n,null);i||(i=t.addFunctionType(r.toSignatureString(),n,null));var a=t.addFunction("__precompute",i,null,e);t.runPasses(["precompute"],a);var o=_BinaryenFunctionGetBody(a);return t.removeFunction("__precompute"),o},t.prototype.convertExpression=function(e,t,r,n,i){assert(0!=n);var a=this.module;return 13==t.kind?(this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,i.range,t.toString(),r.toString()),a.createUnreachable()):13==r.kind?a.createDrop(e):(1!=n||t.isAssignableTo(r)||this.error(c.DiagnosticCode.Conversion_from_type_0_to_1_requires_an_explicit_cast,i.range,t.toString(),r.toString()),t.is(8)?r.is(8)?11==t.kind?12==r.kind&&(e=a.createUnary(p.UnaryOp.PromoteF32,e)):11==r.kind&&(e=a.createUnary(p.UnaryOp.DemoteF64,e)):r.is(4)?11==t.kind?r.is(1)?r.is(64)?e=a.createUnary(p.UnaryOp.TruncF32ToI64,e):(e=a.createUnary(p.UnaryOp.TruncF32ToI32,e),r.is(32)&&(e=E(e,r,a))):r.is(64)?e=a.createUnary(p.UnaryOp.TruncF32ToU64,e):(e=a.createUnary(p.UnaryOp.TruncF32ToU32,e),r.is(32)&&(e=E(e,r,a))):r.is(1)?r.is(64)?e=a.createUnary(p.UnaryOp.TruncF64ToI64,e):(e=a.createUnary(p.UnaryOp.TruncF64ToI32,e),r.is(32)&&(e=E(e,r,a))):r.is(64)?e=a.createUnary(p.UnaryOp.TruncF64ToU64,e):(e=a.createUnary(p.UnaryOp.TruncF64ToU32,e),r.is(32)&&(e=E(e,r,a))):(assert(0==r.flags,"void type expected"),e=a.createDrop(e)):t.is(4)&&r.is(8)?e=11==r.kind?t.is(64)?a.createUnary(t.is(1)?p.UnaryOp.ConvertI64ToF32:p.UnaryOp.ConvertU64ToF32,e):a.createUnary(t.is(1)?p.UnaryOp.ConvertI32ToF32:p.UnaryOp.ConvertU32ToF32,e):t.is(64)?a.createUnary(t.is(1)?p.UnaryOp.ConvertI64ToF64:p.UnaryOp.ConvertU64ToF64,e):a.createUnary(t.is(1)?p.UnaryOp.ConvertI32ToF64:p.UnaryOp.ConvertU32ToF64,e):t.is(64)?r.is(64)||(e=a.createUnary(p.UnaryOp.WrapI64,e),r.is(32)&&(e=E(e,r,a))):r.is(64)?e=a.createUnary(r.is(1)?p.UnaryOp.ExtendI32:p.UnaryOp.ExtendU32,e):r.is(32)&&(t.size>r.size||t.size==r.size&&t.is(1)!=r.is(1))&&(e=E(e,r,a)),this.currentType=r,e)},t.prototype.compileAssertionExpression=function(e,t){var r=this.program.resolveType(e.toType,this.currentFunction.contextualTypeArguments);return r?this.compileExpression(e.expression,r,2):this.module.createUnreachable()},t.prototype.compileBinaryExpression=function(e,t,r){void 0===r&&(r=!0);var n,i,a,o,s,u,h,d=this.module,y=e.left,m=e.right,g=!1,T=!1,A=null;switch(e.operator){case l.Token.LESSTHAN:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"<",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.LtI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.LtI64,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.LtI64:p.BinaryOp.LtI32,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.LtU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.LtU64:p.BinaryOp.LtU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.LtU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.LtF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.LtF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.GREATERTHAN:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,">",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.GtI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.GtI64:p.BinaryOp.GtI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.GtI64,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.GtU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.GtU64:p.BinaryOp.GtU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.GtU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.GtF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.GtF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.LESSTHAN_EQUALS:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"<=",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.LeI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.LeI64:p.BinaryOp.LeI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.LeI64,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.LeU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.LeU64:p.BinaryOp.LeU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.LeU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.LeF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.LeF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.GREATERTHAN_EQUALS:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,">=",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.GeI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.GeI64:p.BinaryOp.GeI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.GeI64,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.GeU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.GeU64:p.BinaryOp.GeU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.GeU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.GeF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.GeF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.EQUALS_EQUALS_EQUALS:case l.Token.EQUALS_EQUALS:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,l.operatorTokenToString(e.operator),i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.EqI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.EqI64:p.BinaryOp.EqI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.EqI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.EqF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.EqF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.EXCLAMATION_EQUALS_EQUALS:case l.Token.EXCLAMATION_EQUALS:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,l.operatorTokenToString(e.operator),i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.NeI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.NeI64:p.BinaryOp.NeI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.NeI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.NeF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.NeF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.EQUALS:return this.compileAssignment(y,m,t);case l.Token.PLUS_EQUALS:g=!0;case l.Token.PLUS:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"+",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;case 2:case 7:h=d.createBinary(p.BinaryOp.AddI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.AddI64:p.BinaryOp.AddI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.AddI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.AddF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.AddF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.MINUS_EQUALS:g=!0;case l.Token.MINUS:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"-",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;case 2:case 7:h=d.createBinary(p.BinaryOp.SubI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.SubI64:p.BinaryOp.SubI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.SubI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.SubF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.SubF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.ASTERISK_EQUALS:g=!0;case l.Token.ASTERISK:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"*",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;case 2:case 7:h=d.createBinary(p.BinaryOp.MulI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.MulI64:p.BinaryOp.MulI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.MulI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.MulF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.MulF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.SLASH_EQUALS:g=!0;case l.Token.SLASH:if(n=this.compileExpressionRetainType(y,t,!0),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"/",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:T=!0;case 2:h=d.createBinary(p.BinaryOp.DivI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.DivI64:p.BinaryOp.DivI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.DivI64,n,a);break;case 5:case 6:case 10:T=!0;case 7:h=d.createBinary(p.BinaryOp.DivU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.DivU64:p.BinaryOp.DivU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.DivU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.DivF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.DivF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.PERCENT_EQUALS:g=!0;case l.Token.PERCENT:if(n=this.compileExpressionRetainType(y,t,!0),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"%",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.RemI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.RemI64:p.BinaryOp.RemI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.RemI64,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.RemU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.RemU64:p.BinaryOp.RemU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.RemU64,n,a);break;case 11:case 12:this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable();break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.LESSTHAN_LESSTHAN_EQUALS:g=!0;case l.Token.LESSTHAN_LESSTHAN:switch(n=this.compileExpressionRetainType(y,t,!1),a=this.compileExpression(m,this.currentType,1,!1),this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;default:h=d.createBinary(p.BinaryOp.ShlI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.ShlI64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.ShlI64:p.BinaryOp.ShlI32,n,a);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,l.operatorTokenToString(e.operator),this.currentType.toString()),d.createUnreachable();case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.GREATERTHAN_GREATERTHAN_EQUALS:g=!0;case l.Token.GREATERTHAN_GREATERTHAN:switch(n=this.compileExpressionRetainType(y,t,!0),a=this.compileExpression(m,this.currentType,1,!0),this.currentType.kind){default:h=d.createBinary(p.BinaryOp.ShrI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.ShrI64,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.ShrI64:p.BinaryOp.ShrI32,n,a);break;case 5:case 6:case 10:case 7:h=d.createBinary(p.BinaryOp.ShrU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.ShrU64,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.ShrU64:p.BinaryOp.ShrU32,n,a);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,l.operatorTokenToString(e.operator),this.currentType.toString()),d.createUnreachable();case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:g=!0;case l.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN:switch(n=this.compileExpressionRetainType(y,t,!0),a=this.compileExpression(m,this.currentType,1,!0),this.currentType.kind){case 0:case 1:T=!0;default:h=d.createBinary(p.BinaryOp.ShrU32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.ShrU64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.ShrU64:p.BinaryOp.ShrU32,n,a);break;case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.AMPERSAND_EQUALS:g=!0;case l.Token.AMPERSAND:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"&",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;default:h=d.createBinary(p.BinaryOp.AndI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.AndI64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.AndI64:p.BinaryOp.AndI32,n,a);break;case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.BAR_EQUALS:g=!0;case l.Token.BAR:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"|",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;default:h=d.createBinary(p.BinaryOp.OrI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.OrI64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.OrI64:p.BinaryOp.OrI32,n,a);break;case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.CARET_EQUALS:g=!0;case l.Token.CARET:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"^",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;default:h=d.createBinary(p.BinaryOp.XorI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.XorI64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.XorI64:p.BinaryOp.XorI32,n,a);break;case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.AMPERSAND_AMPERSAND:n=this.compileExpressionRetainType(y,t),a=this.compileExpression(m,this.currentType,1,!1),(h=d.cloneExpression(n,!0,0))||(A=this.currentFunction.getAndFreeTempLocal(this.currentType),n=d.createTeeLocal(A.index,n)),T=this.currentType.is(36),u=f(n,this.currentType,d),h=h?d.createIf(u,a,h):d.createIf(u,a,d.createGetLocal(assert(A).index,this.currentType.toNativeType()));break;case l.Token.BAR_BAR:n=this.compileExpressionRetainType(y,t),a=this.compileExpression(m,this.currentType,1,!1),(h=this.module.cloneExpression(n,!0,0))||(A=this.currentFunction.getAndFreeTempLocal(this.currentType),n=d.createTeeLocal(A.index,n)),T=this.currentType.is(36),u=f(n,this.currentType,d),h=h?this.module.createIf(u,h,a):d.createIf(u,d.createGetLocal(assert(A).index,this.currentType.toNativeType()),a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=this.module.createUnreachable()}return T&&r&&(assert(this.currentType.is(36)),h=E(h,this.currentType,d)),g?this.compileAssignmentWithValue(y,h,t!=_.Type.void):h},t.prototype.compileAssignment=function(e,t,r){var n=this.currentFunction,i=this.program.resolveExpression(e,n);if(!i)return this.module.createUnreachable();var a,o=i.element;switch(o.kind){case u.ElementKind.GLOBAL:if(!this.compileGlobal(o))return this.module.createUnreachable();assert(o.type!=_.Type.void,"concrete type expected");case u.ElementKind.LOCAL:case u.ElementKind.FIELD:a=o.type;break;case u.ElementKind.PROPERTY:var s=o.setterPrototype;if(s){var p=s.resolve();if(!p)return this.module.createUnreachable();assert(1==p.signature.parameterTypes.length),a=p.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,o.internalName),this.module.createUnreachable();case u.ElementKind.FUNCTION_PROTOTYPE:if(e.kind==h.NodeKind.ELEMENTACCESS&&i.target&&i.target.kind==u.ElementKind.CLASS){if(o.simpleName!=i.target.prototype.fnIndexedGet)return this.error(c.DiagnosticCode.Index_signature_is_missing_in_type_0,e.range,i.target.toString()),this.module.createUnreachable();var l=o.resolve(null);if(l){a=l.signature.returnType;break}}default:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}var d=this.compileExpression(t,a);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.program.resolveExpression(e,this.currentFunction);if(!i)return n.createUnreachable();var a=i.element;switch(a.kind){case u.ElementKind.LOCAL:return this.currentType=r?a.type:_.Type.void,a.is(u.CommonFlags.CONST)?(this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,a.internalName),n.createUnreachable()):r?n.createTeeLocal(a.index,t):n.createSetLocal(a.index,t);case u.ElementKind.GLOBAL:if(!this.compileGlobal(a))return n.createUnreachable();var o=a.type;if(assert(o!=_.Type.void),this.currentType=r?o:_.Type.void,a.is(u.CommonFlags.CONST))return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,a.internalName),n.createUnreachable();if(r){var s=o.toNativeType(),p=a.internalName;return n.createBlock(null,[n.createSetGlobal(p,t),n.createGetGlobal(p,s)],s)}return n.createSetGlobal(a.internalName,t);case u.ElementKind.FIELD:if(a.is(u.CommonFlags.READONLY))return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,a.internalName),n.createUnreachable();assert(i.isInstanceTarget);var l=this.compileExpression(i.targetExpression,i.target.type);o=a.type;this.currentType=r?o:_.Type.void;s=o.toNativeType();if(r){var d=this.currentFunction.getAndFreeTempLocal(o).index;return n.createBlock(null,[n.createSetLocal(d,t),n.createStore(o.size>>3,l,n.createGetLocal(d,s),s,a.memoryOffset),n.createGetLocal(d,s)],s)}return n.createStore(o.size>>3,l,t,s,a.memoryOffset);case u.ElementKind.PROPERTY:var y=a.setterPrototype;if(y){if(!(I=y.resolve()))return n.createUnreachable();if(!r){if(I.is(u.CommonFlags.INSTANCE)){assert(i.isInstanceTarget);var m=this.compileExpression(i.targetExpression,i.target.type);return this.makeCallDirect(I,[m,t])}return this.makeCallDirect(I,[t])}var g=a.getterPrototype;if(assert(null!=g),!(T=g.resolve()))return n.createUnreachable();var E=(b=T.signature.returnType).toNativeType();if(I.is(u.CommonFlags.INSTANCE)){assert(i.isInstanceTarget);m=this.compileExpression(i.targetExpression,i.target.type),d=this.currentFunction.getAndFreeTempLocal(b).index;return n.createBlock(null,[this.makeCallDirect(I,[n.createTeeLocal(d,m),t]),this.makeCallDirect(T,[n.createGetLocal(d,E)])],E)}return n.createBlock(null,[this.makeCallDirect(I,[t]),this.makeCallDirect(T)],E)}return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,a.internalName),n.createUnreachable();case u.ElementKind.FUNCTION_PROTOTYPE:if(e.kind==h.NodeKind.ELEMENTACCESS){var T;if(assert(i.isInstanceTarget),!(T=a.resolve()))return n.createUnreachable();var f=i.target.prototype.fnIndexedSet,A=void 0;if(null!=f&&i.target.members&&(A=i.target.members.get(f))&&A.kind==u.ElementKind.FUNCTION_PROTOTYPE){var I;if(!(I=A.resolve()))return n.createUnreachable();var v=i.target.type,N=(l=this.compileExpression(i.targetExpression,v),this.compileExpression(e.elementExpression,_.Type.i32));if(r){var C=this.currentFunction.getTempLocal(v),S=this.currentFunction.getAndFreeTempLocal(this.currentType),b=T.signature.returnType;return this.currentFunction.freeTempLocal(C),n.createBlock(null,[this.makeCallDirect(I,[n.createTeeLocal(C.index,l),n.createTeeLocal(S.index,N),t]),this.makeCallDirect(T,[n.createGetLocal(C.index,C.type.toNativeType()),n.createGetLocal(S.index,S.type.toNativeType())])],b.toNativeType())}return this.makeCallDirect(I,[l,N,t])}return this.error(c.DiagnosticCode.Index_signature_in_type_0_only_permits_reading,e.range,i.target.internalName),n.createUnreachable()}}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()},t.prototype.compileCallExpression=function(e,t){var r=this.module,n=this.currentFunction,i=this.program.resolveExpression(e.expression,n);if(!i)return r.createUnreachable();var a,o,l=i.element;switch(l.kind){case u.ElementKind.FUNCTION_PROTOTYPE:var h=l;if(h.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN)){var _=s.compileCall(this,h,h.resolveBuiltinTypeArguments(e.typeArguments,n.contextualTypeArguments),e.arguments,t,e);return _||(this.error(c.DiagnosticCode.Operation_not_supported,e.range),r.createUnreachable())}var d=h.resolveUsingTypeArguments(e.typeArguments,n.contextualTypeArguments,e);if(!d)return r.createUnreachable();var y=0;if(d.is(u.CommonFlags.INSTANCE)){if(assert(i.isInstanceTarget),!(y=this.compileExpression(i.targetExpression,i.target.type)))return r.createUnreachable()}else assert(!i.isInstanceTarget);return this.compileCallDirect(d,e.arguments,e,y);case u.ElementKind.LOCAL:if(a=l.type.functionType){o=r.createGetLocal(l.index,p.NativeType.I32);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,l.type.toString()),r.createUnreachable();case u.ElementKind.GLOBAL:if(a=l.type.functionType){o=r.createGetGlobal(l.internalName,l.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,l.type.toString()),r.createUnreachable();case u.ElementKind.FIELD:var m=l.type;if(a=m.functionType){var g=this.compileExpression(assert(i.targetExpression),m);o=r.createLoad(4,!1,g,p.NativeType.I32,l.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,l.type.toString()),r.createUnreachable();case u.ElementKind.FUNCTION_TARGET:a=l.signature,o=this.compileExpression(e.expression,l.type);break;case u.ElementKind.PROPERTY:default:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),r.createUnreachable()}return this.compileCallIndirect(a,o,e.arguments,e)},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,o=e.parameterTypes.length;return t<a?(this.error(a<o?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>o&&!i)||(this.error(c.DiagnosticCode.Expected_0_arguments_but_got_1,n.range,o.toString(),t.toString()),!1)},t.prototype.compileCallDirect=function(e,t,r,n){void 0===n&&(n=0);var i=t.length,a=e.signature;if(!this.checkCallSignature(a,i,0!=n,r))return this.module.createUnreachable();var o=n?i+1:i,s=new Array(o),c=0;n&&(s[0]=n,c=1);for(var p=a.parameterTypes,u=0;u<i;++u,++c)s[c]=this.compileExpression(t[u],p[u]);return assert(c==o),this.makeCallDirect(e,s)},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.parameterTypes,o=r.returnType,s=r.thisType,c=e.is(u.CommonFlags.INSTANCE),l=r.requiredParameters,h=l,d=i.length,y=d;c&&(++h,++y);var m=y-h;assert(m);var g=new Array(h),E=0,T=this.module;c&&(g[0]=T.createGetLocal(0,this.options.nativeSizeType),E=1);for(var f=0;f<l;++f,++E)g[E]=T.createGetLocal(E,i[f].toNativeType());assert(E==h);var A=new Array(d+1);for(f=0;f<d;++f)A[f]=i[f];A[d]=_.Type.i32;var I=new _.Signature(A,o,s),v=n+"|trampoline";I.requiredParameters=d+1,(t=new u.Function(e.prototype,v,I,e.memberOf)).flags=e.flags,t.set(u.CommonFlags.COMPILED),e.trampoline=t;var N=this.currentFunction;this.currentFunction=t;var C=m+1,S=new Array(C);for(f=0;f<C;++f){var b="N="+f.toString();S[f]=b}var O=T.createBlock(S[0],[T.createBlock("N=invalid",[T.createSwitch(S,"N=invalid",T.createGetLocal(y,p.NativeType.I32))]),T.createUnreachable()]);for(f=0;f<m;++f,++E){var L=i[l+f];O=T.createBlock(S[f+1],[O,T.createSetLocal(E,this.compileExpression(assert(a[l+f].initializer),L))]),g[E]=T.createGetLocal(E,L.toNativeType())}this.currentFunction=N,assert(E==y);var k=this.ensureFunctionType(I),x=T.addFunction(v,k,_.typesToNativeTypes(t.additionalLocals),T.createBlock(null,[O,T.createCall(n,g,o.toNativeType())],o.toNativeType()));return t.finalize(T,x),t},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,o=a;e.is(u.CommonFlags.INSTANCE)&&(++i,++o,--n),assert(r>=i);var s=this.module;if(!this.compileFunction(e))return s.createUnreachable();if(r<o){if(e=this.ensureTrampoline(e),!this.compileFunction(e))return s.createUnreachable();t||((t=new Array(o+1)).length=0);for(var c=n;c<a;++c)t.push(e.signature.parameterTypes[c].toNativeZero(s));t.push(s.createI32(r-i))}var p=e.signature.returnType;return this.currentType=p,e.is(u.CommonFlags.MODULE_IMPORT)?s.createCallImport(e.internalName,t,p.toNativeType()):s.createCall(e.internalName,t,p.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 o=i?a+1:a,s=new Array(o),c=0;i&&(s[0]=i,c=1);for(var p=e.parameterTypes,u=0;u<a;++u,++c)s[c]=this.compileExpression(r[u],p[u]);return assert(c==o),this.makeCallIndirect(e,t,s)},t.prototype.makeCallIndirect=function(e,t,r){var n=e.returnType;return this.currentType=n,this.ensureFunctionType(e),this.module.createCallIndirect(t,r,e.toSignatureString())},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);return i[n]=this.compileExpression(r[n],t),this.module.createBlock(null,i,this.currentType.toNativeType())},t.prototype.compileElementAccessExpression=function(e,t){var r=this.program.resolveElementAccess(e,this.currentFunction);if(!r)return this.module.createUnreachable();assert(r.element.kind==u.ElementKind.FUNCTION_PROTOTYPE&&r.target&&r.target.kind==u.ElementKind.CLASS);var n=r.target,i=r.element.resolve(null,n.contextualTypeArguments);if(!i)return this.module.createUnreachable();var a=this.compileExpression(e.expression,n.type);return this.compileCallDirect(i,[e.elementExpression],e,a)},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,o=new u.FunctionPrototype(this.program,i,a.internalName+"~"+i,r),s=this.compileFunctionUsingTypeArguments(o,[],a.contextualTypeArguments,r);if(!s)return this.module.createUnreachable();this.currentType=_.Type.u32.asFunction(s.signature);var c=this.ensureFunctionTableEntry(s);return c<0?this.module.createUnreachable():this.module.createI32(c)},t.prototype.compileIdentifierExpression=function(e,t,r){var n=this.module;switch(e.kind){case h.NodeKind.NULL:var i=this.options;return t.classType||(this.currentType=i.usizeType),i.isWasm64?n.createI64(0):n.createI32(0);case h.NodeKind.TRUE:return this.currentType=_.Type.bool,n.createI32(1);case h.NodeKind.FALSE:return this.currentType=_.Type.bool,n.createI32(0);case h.NodeKind.THIS:if((l=this.currentFunction).is(u.CommonFlags.INSTANCE)){var a=assert(l.memberOf);assert(a.kind==u.ElementKind.CLASS);var o=a.type;return 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 h.NodeKind.SUPER:var l;if((l=this.currentFunction).is(u.CommonFlags.INSTANCE)){a=assert(l.memberOf);assert(a.kind==u.ElementKind.CLASS);var d=a.base;if(d){var y=d.type;return this.currentType=y,n.createGetLocal(0,y.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 m=this.program.resolveIdentifier(e,this.currentFunction,this.currentEnum);if(!m)return n.createUnreachable();var g=m.element;switch(g.kind){case u.ElementKind.LOCAL:if(g.is(u.CommonFlags.INLINED))return this.compileInlineConstant(g,t,r);var E=g.type,T=g.index;return assert(T>=0),this.currentType=E,this.module.createGetLocal(T,E.toNativeType());case u.ElementKind.GLOBAL:if(g.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN))return s.compileGetConstant(this,g,e);if(!this.compileGlobal(g))return this.module.createUnreachable();var f=g.type;return assert(f!=_.Type.void),g.is(u.CommonFlags.INLINED)?this.compileInlineConstant(g,t,r):(this.currentType=f,this.module.createGetGlobal(g.internalName,f.toNativeType()));case u.ElementKind.ENUMVALUE:return g.is(u.CommonFlags.COMPILED)?(this.currentType=_.Type.i32,g.is(u.CommonFlags.INLINED)?this.module.createI32(g.constantValue):this.module.createGetGlobal(g.internalName,p.NativeType.I32)):(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 A=g.resolve(null,this.currentFunction.contextualTypeArguments);if(!A||!this.compileFunction(A))return n.createUnreachable();var I=this.ensureFunctionTableEntry(A);return this.currentType=_.Type.u32.asFunction(A.signature),this.module.createI32(I)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()},t.prototype.compileLiteralExpression=function(e,t,r){void 0===r&&(r=!1);var n=this.module;switch(e.literalKind){case h.LiteralKind.ARRAY:assert(!r);var i=t.classType;return i&&i.prototype==this.program.elementsLookup.get("Array")?this.compileStaticArray(assert(i.typeArguments)[0],e.elementExpressions,e):(this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable());case h.LiteralKind.FLOAT:var a=e.value;return r&&(a=-a),t==_.Type.f32?n.createF32(a):(this.currentType=_.Type.f64,n.createF64(a));case h.LiteralKind.INTEGER:var o=e.value;switch(r&&(o=i64_sub(i64_new(0),o)),t.kind){case 0:if(i64_is_i8(o))return n.createI32(i64_low(o));break;case 1:if(i64_is_i16(o))return n.createI32(i64_low(o));break;case 2:if(i64_is_i32(o))return n.createI32(i64_low(o));break;case 5:if(i64_is_u8(o))return n.createI32(i64_low(o));break;case 6:if(i64_is_u16(o))return n.createI32(i64_low(o));break;case 7:if(i64_is_u32(o))return n.createI32(i64_low(o));break;case 10:if(i64_is_bool(o))return n.createI32(i64_low(o));break;case 4:case 9:if(!this.options.isWasm64){if(i64_is_u32(o))return n.createI32(i64_low(o));break}return n.createI64(i64_low(o),i64_high(o));case 3:case 8:return n.createI64(i64_low(o),i64_high(o));case 11:if(i64_is_f32(o))return n.createF32(i64_to_f32(o));break;case 12:if(i64_is_f64(o))return n.createF64(i64_to_f64(o));break;case 13:break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()}return i64_is_i32(o)?(this.currentType=_.Type.i32,n.createI32(i64_low(o))):(this.currentType=_.Type.i64,n.createI64(i64_low(o),i64_high(o)));case h.LiteralKind.STRING:return assert(!r),this.compileStaticString(e.value)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.currentType=t,n.createUnreachable()},t.prototype.compileStaticString=function(e){var t=this.module,r=this.options,n=this.stringSegments,i=n.get(e);if(!i){var a=e.length,o=new Uint8Array(4+2*a);o[0]=255&a,o[1]=a>>>8&255,o[2]=a>>>16&255,o[3]=a>>>24&255;for(var s=0;s<a;++s)o[4+2*s]=255&e.charCodeAt(s),o[5+2*s]=e.charCodeAt(s)>>>8&255;i=this.addMemorySegment(o,r.usizeType.byteSize),n.set(e,i)}var c=i.offset,p=this.program.typesLookup.get("string");return this.currentType=p||r.usizeType,r.isWasm64?t.createI64(i64_low(c),i64_high(c)):(assert(i64_is_i32(c)),t.createI32(i64_low(c)))},t.prototype.compileStaticArray=function(e,t,r){var n=!0,i=this.module,a=assert(this.program.elementsLookup.get("Array"));if(!a||a.kind!=u.ElementKind.CLASS_PROTOTYPE)return i.createUnreachable();var o=a.resolve([e]);if(!o)return i.createUnreachable();var s,l,h=t.length,_=e.toNativeType();switch(_){case p.NativeType.I32:s=changetype(new Int32Array(h)),l=4*h;break;case p.NativeType.I64:s=changetype(new Array(h)),l=8*h;break;case p.NativeType.F32:s=changetype(new Float32Array(h)),l=4*h;break;case p.NativeType.F64:s=changetype(new Float64Array(h)),l=8*h;break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,r.range),i.createUnreachable()}for(var y,m=new Array(h),g=0;g<h;++g)if(m[g]=t[g]?this.compileExpression(t[g],e):e.toNativeZero(i),n)if(y=this.precomputeExpressionRef(m[g]),_BinaryenExpressionGetId(y)==p.ExpressionId.Const)switch(assert(_BinaryenExpressionGetType(y)==_),_){case p.NativeType.I32:changetype(s)[g]=_BinaryenConstGetValueI32(y);break;case p.NativeType.I64:changetype(s)[g]=i64_new(_BinaryenConstGetValueI64Low(y),_BinaryenConstGetValueI64High(y));break;case p.NativeType.F32:changetype(s)[g]=_BinaryenConstGetValueF32(y);break;case p.NativeType.F64:changetype(s)[g]=_BinaryenConstGetValueF64(y);break;default:assert(!1)}else n=!1;var E=this.options.usizeType.byteSize,T=E+4+4;if(n){var f=new Uint8Array(T+l),A=this.addMemorySegment(f),I=0;switch(8==E?d.writeI64(i64_add(A.offset,i64_new(T)),f,0):(assert(0==i64_high(A.offset)),d.writeI32(i64_low(A.offset)+T,f,0)),I+=E,d.writeI32(h,f,I),I+=4,d.writeI32(h,f,I),I+=4,assert(I==T),_){case p.NativeType.I32:for(g=0;g<h;++g)d.writeI32(changetype(s)[g],f,I),I+=4;break;case p.NativeType.I64:for(g=0;g<h;++g)d.writeI64(changetype(s)[g],f,I),I+=8;break;case p.NativeType.F32:for(g=0;g<h;++g)d.writeF32(changetype(s)[g],f,I),I+=4;break;case p.NativeType.F64:for(g=0;g<h;++g)d.writeF64(changetype(s)[g],f,I),I+=8;break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,r.range),i.createUnreachable()}return assert(I==T+l),this.currentType=o.type,8==E?i.createI64(i64_low(A.offset),i64_high(A.offset)):i.createI32(i64_low(A.offset))}throw new Error("not implemented")},t.prototype.compileNewExpression=function(e,t){var r,n,i=this.module,o=this.options,p=this.currentFunction,l=this.program.resolveExpression(e.expression,p);if(l)if(l.element.kind==u.ElementKind.CLASS_PROTOTYPE){var h=l.element.resolveUsingTypeArguments(e.typeArguments,null,e);if(h){var _=s.compileAllocate(this,h,e),d=new Array,y=p.getTempLocal(o.usizeType);if(d.push(i.createSetLocal(y.index,_)),h.members)try{for(var m=a(h.members.values()),g=m.next();!g.done;g=m.next()){var E=g.value;if(E.kind==u.ElementKind.FIELD){var T=E,f=T.prototype.declaration;T.is(u.CommonFlags.CONST)?assert(!1):f&&f.initializer&&d.push(i.createStore(T.type.byteSize,i.createGetLocal(y.index,o.nativeSizeType),this.compileExpression(f.initializer,T.type),T.type.toNativeType(),T.memoryOffset))}}}catch(e){r={error:e}}finally{try{g&&!g.done&&(n=m.return)&&n.call(m)}finally{if(r)throw r.error}}var A=h.constructorInstance;return A&&d.push(this.compileCallDirect(A,e.arguments,e,i.createGetLocal(y.index,o.nativeSizeType))),d.push(i.createGetLocal(y.index,o.nativeSizeType)),p.freeTempLocal(y),_=i.createBlock(null,d,o.nativeSizeType),this.currentType=h.type,_}}else this.error(c.DiagnosticCode.Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature,e.expression.range);return i.createUnreachable()},t.prototype.compileParenthesizedExpression=function(e,t,r){return void 0===r&&(r=!0),this.compileExpression(e.expression,t,0,r)},t.prototype.compilePropertyAccessExpression=function(e,t,r){var n=this.program,i=this.module,a=n.resolvePropertyAccess(e,this.currentFunction);if(!a)return i.createUnreachable();var o,l=a.element;switch(l.kind){case u.ElementKind.GLOBAL:if(l.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN))return s.compileGetConstant(this,l,e);if(!this.compileGlobal(l))return i.createUnreachable();var h=l.type;return assert(h!=_.Type.void),l.is(u.CommonFlags.INLINED)?this.compileInlineConstant(l,t,r):(this.currentType=h,i.createGetGlobal(l.internalName,h.toNativeType()));case u.ElementKind.ENUMVALUE:return this.compileEnum(l.enum)?(this.currentType=_.Type.i32,l.is(u.CommonFlags.INLINED)?i.createI32(l.constantValue):i.createGetGlobal(l.internalName,p.NativeType.I32)):this.module.createUnreachable();case u.ElementKind.FIELD:return assert(a.isInstanceTarget),assert(l.memoryOffset>=0),o=this.compileExpression(a.targetExpression,this.options.usizeType,0),this.currentType=l.type,i.createLoad(l.type.size>>3,l.type.is(5),o,l.type.toNativeType(),l.memoryOffset);case u.ElementKind.PROPERTY:var d=l.getterPrototype;if(d){var y=d.resolve(null);if(!y)return i.createUnreachable();var m=y.signature;if(!this.checkCallSignature(m,0,y.is(u.CommonFlags.INSTANCE),e))return i.createUnreachable();if(y.is(u.CommonFlags.INSTANCE)){var g=assert(y.memberOf);return assert(g.kind==u.ElementKind.CLASS),o=this.compileExpression(a.targetExpression,g.type),this.currentType=m.returnType,this.compileCallDirect(y,[],e,o)}return this.currentType=m.returnType,this.compileCallDirect(y,[],e)}return this.error(c.DiagnosticCode.Property_0_does_not_exist_on_type_1,e.range,l.simpleName,l.parent.toString()),i.createUnreachable()}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable()},t.prototype.compileTernaryExpression=function(e,t){var r=e.ifThen,n=e.ifElse,i=f(this.compileExpression(e.condition,_.Type.u32,0),this.currentType,this.module);if(this.currentFunction.isAny(u.CommonFlags.GENERIC|u.CommonFlags.GENERIC_CONTEXT)&&_BinaryenExpressionGetId(i=this.precomputeExpressionRef(i))==p.ExpressionId.Const&&_BinaryenExpressionGetType(i)==p.NativeType.I32)return _BinaryenConstGetValueI32(i)?this.compileExpression(r,t):this.compileExpression(n,t);var a=this.compileExpression(r,t),o=this.compileExpression(n,t);return this.module.createIf(i,a,o)},t.prototype.compileUnaryPostfixExpression=function(e,t){var r,n,i,a,o=this.module,s=this.currentFunction,u=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),h=this.currentType,d=!1;switch(e.operator){case l.Token.PLUS_PLUS:if(h.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable();switch(h.kind){case 0:case 1:case 5:case 6:case 10:d=!0;default:r=p.BinaryOp.AddI32,n=p.NativeType.I32,i=o.createI32(1);break;case 9:case 4:r=(y=this.options).isWasm64?p.BinaryOp.AddI64:p.BinaryOp.AddI32,n=y.nativeSizeType,i=h.toNativeOne(o);break;case 3:case 8:r=p.BinaryOp.AddI64,n=p.NativeType.I64,i=o.createI64(1);break;case 11:r=p.BinaryOp.AddF32,n=p.NativeType.F32,i=o.createF32(1);break;case 12:r=p.BinaryOp.AddF64,n=p.NativeType.F64,i=o.createF64(1);break;case 13:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable()}break;case l.Token.MINUS_MINUS:if(h.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable();switch(h.kind){case 0:case 1:case 5:case 6:case 10:d=!0;default:r=p.BinaryOp.SubI32,n=p.NativeType.I32,i=o.createI32(1);break;case 9:case 4:var y;r=(y=this.options).isWasm64?p.BinaryOp.SubI64:p.BinaryOp.SubI32,n=y.nativeSizeType,i=h.toNativeOne(o);break;case 3:case 8:r=p.BinaryOp.SubI64,n=p.NativeType.I64,i=o.createI64(1);break;case 11:r=p.BinaryOp.SubF32,n=p.NativeType.F32,i=o.createF32(1);break;case 12:r=p.BinaryOp.SubF64,n=p.NativeType.F64,i=o.createF64(1);break;case 13:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable()}break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable()}var m=null;if(t==_.Type.void?a=o.createBinary(r,u,i):(m=s.getTempLocal(h),a=o.createBinary(r,this.module.createGetLocal(m.index,n),i)),d&&(assert(h.is(36)),a=E(a,h,o)),a=this.compileAssignmentWithValue(e.operand,a,!1),t==_.Type.void)return assert(!m),a;this.currentType=assert(m).type,s.freeTempLocal(m);var g=m.index;return o.createBlock(null,[o.createSetLocal(g,u),a,o.createGetLocal(g,n)],n)},t.prototype.compileUnaryPrefixExpression=function(e,t,r){void 0===r&&(r=!0);var n,i=this.module,a=this.currentType,o=!1,s=!1;switch(e.operator){case l.Token.PLUS:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),o=(a=this.currentType).is(36);break;case l.Token.MINUS:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();if(e.operand.kind!=h.NodeKind.LITERAL||e.operand.literalKind!=h.LiteralKind.INTEGER&&e.operand.literalKind!=h.LiteralKind.FLOAT)switch(n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),(a=this.currentType).kind){case 0:case 1:case 5:case 6:case 10:o=!0;default:n=i.createBinary(p.BinaryOp.SubI32,i.createI32(0),n);break;case 9:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();case 4:n=i.createBinary(this.options.isWasm64?p.BinaryOp.SubI64:p.BinaryOp.SubI32,a.toNativeZero(i),n);break;case 3:case 8:n=i.createBinary(p.BinaryOp.SubI64,i.createI64(0),n);break;case 11:n=i.createUnary(p.UnaryOp.NegF32,n);break;case 12:n=i.createUnary(p.UnaryOp.NegF64,n)}else n=this.compileLiteralExpression(e.operand,t,!0),this.options.sourceMap&&g(n,e.range,i,this.currentFunction),a=this.currentType;break;case l.Token.PLUS_PLUS:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();switch(s=!0,n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),(a=this.currentType).kind){case 0:case 1:case 5:case 6:case 10:o=!0;default:n=i.createBinary(p.BinaryOp.AddI32,n,this.module.createI32(1));break;case 9:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();case 4:n=i.createBinary(this.options.isWasm64?p.BinaryOp.AddI64:p.BinaryOp.AddI32,n,a.toNativeOne(i));break;case 3:case 8:n=i.createBinary(p.BinaryOp.AddI64,n,i.createI64(1));break;case 11:n=i.createBinary(p.BinaryOp.AddF32,n,i.createF32(1));break;case 12:n=i.createBinary(p.BinaryOp.AddF64,n,i.createF64(1))}break;case l.Token.MINUS_MINUS:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();switch(s=!0,n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),(a=this.currentType).kind){case 0:case 1:case 5:case 6:case 10:o=!0;default:n=i.createBinary(p.BinaryOp.SubI32,n,i.createI32(1));break;case 9:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();case 4:n=i.createBinary(this.options.isWasm64?p.BinaryOp.SubI64:p.BinaryOp.SubI32,n,a.toNativeOne(i));break;case 3:case 8:n=i.createBinary(p.BinaryOp.SubI64,n,i.createI64(1));break;case 11:n=i.createBinary(p.BinaryOp.SubF32,n,i.createF32(1));break;case 12:n=i.createBinary(p.BinaryOp.SubF64,n,i.createF64(1))}break;case l.Token.EXCLAMATION:n=T(n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!0),this.currentType,i),this.currentType=_.Type.bool;break;case l.Token.TILDE:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();switch(n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t.is(8)?_.Type.i64:t,t==_.Type.void?0:1,!1),(a=this.currentType).kind){case 0:case 1:case 5:case 6:case 10:o=!0;default:n=i.createBinary(p.BinaryOp.XorI32,n,i.createI32(-1));break;case 9:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();case 4:n=i.createBinary(this.options.isWasm64?p.BinaryOp.XorI64:p.BinaryOp.XorI32,n,a.toNativeNegOne(i));break;case 3:case 8:n=i.createBinary(p.BinaryOp.XorI64,n,i.createI64(-1,-1))}break;case l.Token.TYPEOF:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable()}return o&&r&&(assert(a.is(36)),n=E(n,a,i)),s?this.compileAssignmentWithValue(e.operand,n,t!=_.Type.void):n},t}(c.DiagnosticEmitter);function g(e,t,r,n){var i=t.source;i.debugInfoIndex<0&&(i.debugInfoIndex=r.addDebugInfoFile(i.normalizedPath)),t.debugInfoRef=e,n.debugLocations||(n.debugLocations=[]),n.debugLocations.push(t)}function E(e,t,r){switch(t.kind){case 0:return r.createBinary(p.BinaryOp.ShrI32,r.createBinary(p.BinaryOp.ShlI32,e,r.createI32(24)),r.createI32(24));case 1:return r.createBinary(p.BinaryOp.ShrI32,r.createBinary(p.BinaryOp.ShlI32,e,r.createI32(16)),r.createI32(16));case 5:return r.createBinary(p.BinaryOp.AndI32,e,r.createI32(255));case 6:return r.createBinary(p.BinaryOp.AndI32,e,r.createI32(65535));case 10:return r.createBinary(p.BinaryOp.AndI32,e,r.createI32(1));default:return assert(!1),e}}function T(e,t,r){switch(t.kind){default:return r.createUnary(p.UnaryOp.EqzI32,e);case 3:case 8:return r.createUnary(p.UnaryOp.EqzI64,e);case 9:case 4:return r.createUnary(64==t.size?p.UnaryOp.EqzI64:p.UnaryOp.EqzI32,e);case 11:return r.createBinary(p.BinaryOp.EqF32,e,r.createF32(0));case 12:return r.createBinary(p.BinaryOp.EqF64,e,r.createF64(0));case 13:return assert(!1),r.createI32(1)}}function f(e,t,r){switch(t.kind){default:return e;case 3:case 8:return r.createBinary(p.BinaryOp.NeI64,e,r.createI64(0));case 9:case 4:return 64==t.size?r.createBinary(p.BinaryOp.NeI64,e,r.createI64(0)):e;case 11:return r.createBinary(p.BinaryOp.NeF32,e,r.createF32(0));case 12:return r.createBinary(p.BinaryOp.NeF64,e,r.createF64(0));case 13:return assert(!1),r.createI32(0)}}t.Compiler=m,t.makeSmallIntegerWrap=E,t.makeIsFalseish=T,t.makeIsTrueish=f},function(e,t,r){"use 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_be_initialized=1155]="_const_declarations_must_be_initialized",e[e.Unterminated_regular_expression_literal=1161]="Unterminated_regular_expression_literal",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.A_class_may_only_extend_another_class=1311]="A_class_may_only_extend_another_class",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.The_0_operator_cannot_be_applied_to_type_1=2469]="The_0_operator_cannot_be_applied_to_type_1",e[e.Export_declaration_conflicts_with_exported_declaration_of_0=2484]="Export_declaration_conflicts_with_exported_declaration_of_0",e[e.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property=2540]="Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property",e[e.The_target_of_an_assignment_must_be_a_variable_or_a_property_access=2541]="The_target_of_an_assignment_must_be_a_variable_or_a_property_access",e[e.Index_signature_in_type_0_only_permits_reading=2542]="Index_signature_in_type_0_only_permits_reading",e[e.Expected_0_arguments_but_got_1=2554]="Expected_0_arguments_but_got_1",e[e.Expected_at_least_0_arguments_but_got_1=2555]="Expected_at_least_0_arguments_but_got_1",e[e.Expected_0_type_arguments_but_got_1=2558]="Expected_0_type_arguments_but_got_1",e[e.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums=2651]="A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums",e[e.Namespace_0_has_no_exported_member_1=2694]="Namespace_0_has_no_exported_member_1",e[e.File_0_not_found=6054]="File_0_not_found"}(t.DiagnosticCode||(t.DiagnosticCode={})),t.diagnosticCodeToString=function(e){switch(e){case 100:return"Operation not supported.";case 101:return"Operation is unsafe.";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"Structs cannot extend classes and vice-versa.";case 208:return"Structs cannot implement interfaces.";case 209:return"Invalid regular expression flags.";case 210:return"Implementation '{0}' must match the signature '{1}'.";case 1002:return"Unterminated string literal.";case 1003:return"Identifier expected.";case 1005:return"'{0}' expected.";case 1006:return"A file cannot have a reference to itself.";case 1009:return"Trailing comma not allowed.";case 1012:return"Unexpected token.";case 1014:return"A rest parameter must be last in a parameter list.";case 1015:return"Parameter cannot have question mark and initializer.";case 1016:return"A required parameter cannot follow an optional parameter.";case 1061:return"Enum member must have initializer.";case 1036:return"Statements are not allowed in ambient contexts.";case 1039:return"Initializers are not allowed in ambient contexts.";case 1042:return"'{0}' modifier cannot be used here.";case 1047:return"A rest parameter cannot be optional.";case 1048:return"A rest parameter cannot have an initializer.";case 1049:return"A 'set' accessor must have exactly one parameter.";case 1052:return"A 'set' accessor parameter cannot have an initializer.";case 1054:return"A 'get' accessor cannot have parameters.";case 1092:return"Type parameters cannot appear on a constructor declaration.";case 1093:return"Type annotation cannot appear on a constructor declaration.";case 1094:return"An accessor cannot have type parameters.";case 1095:return"A 'set' accessor cannot have a return type annotation.";case 1098:return"Type parameter list cannot be empty.";case 1104:return"A 'continue' statement can only be used within an enclosing iteration statement.";case 1105:return"A 'break' statement can only be used within an enclosing iteration or switch statement.";case 1108:return"A 'return' statement can only be used within a function body.";case 1109:return"Expression expected.";case 1110:return"Type expected.";case 1113:return"A 'default' clause cannot appear more than once in a 'switch' statement.";case 1114:return"Duplicate label '{0}'.";case 1121:return"Octal literals are not allowed in strict mode.";case 1124:return"Digit expected.";case 1125:return"Hexadecimal digit expected.";case 1126:return"Unexpected end of text.";case 1127:return"Invalid character.";case 1130:return"'case' or 'default' expected.";case 1038:return"A 'declare' modifier cannot be used in an already ambient context.";case 1140:return"Type argument expected.";case 1141:return"String literal expected.";case 1142:return"Line break not permitted here.";case 1146:return"Declaration expected.";case 1155:return"'const' declarations must be initialized.";case 1161:return"Unterminated regular expression literal.";case 1177:return"Binary digit expected.";case 1178:return"Octal digit expected.";case 1183:return"An implementation cannot be declared in ambient contexts.";case 1198:return"An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive.";case 1199:return"Unterminated Unicode escape sequence.";case 1206:return"Decorators are not valid here.";case 1242:return"'abstract' modifier can only appear on a class, method, or property declaration.";case 1311:return"A class may only extend another class.";case 2300:return"Duplicate identifier '{0}'.";case 2304:return"Cannot find name '{0}'.";case 2305:return"Module '{0}' has no exported member '{1}'.";case 2314:return"Generic type '{0}' requires {1} type argument(s).";case 2315:return"Type '{0}' is not generic.";case 2322:return"Type '{0}' is not assignable to type '{1}'.";case 2329:return"Index signature is missing in type '{0}'.";case 2332:return"'this' cannot be referenced in current location.";case 2335:return"'super' can only be referenced in a derived class.";case 2339:return"Property '{0}' does not exist on type '{1}'.";case 2349:return"Cannot invoke an expression whose type lacks a call signature. 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 2469:return"The '{0}' operator cannot be applied to type '{1}'.";case 2484:return"Export declaration conflicts with exported declaration of '{0}'.";case 2540:return"Cannot assign to '{0}' because it is a constant or a read-only property.";case 2541:return"The target of an assignment must be a variable or a property access.";case 2542:return"Index signature in type '{0}' only permits reading.";case 2554:return"Expected {0} arguments, but got {1}.";case 2555:return"Expected at least {0} arguments, but got {1}.";case 2558:return"Expected {0} type arguments, but got {1}.";case 2651:return"A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums.";case 2694:return"Namespace '{0}' has no exported member '{1}'.";case 6054:return"File '{0}' not found.";default:return""}}},function(e,t,r){"use strict";var n,i=this&&this.__extends||(n=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])},function(e,t){function r(){this.constructor=e}n(e,t),e.prototype=null===t?Object.create(t):(r.prototype=t.prototype,new r)});Object.defineProperty(t,"__esModule",{value:!0});var a=r(0),o=r(6),s=r(2),c=r(1),p=r(5),u=a.LIBRARY_PREFIX+"builtins.ts",l=function(e){function t(){var t=e.call(this)||this;return t.backlog=new Array,t.seenlog=new Set,t.onComment=null,t.tryParseSignatureIsSignature=!1,t.program=new a.Program(t.diagnostics),t}return i(t,e),t.prototype.parseFile=function(e,t,r){for(var n=this.program,i=c.normalizePath(t),s=n.sources,l=0,h=s.length;l<h;++l)if(s[l].normalizedPath==i)return;this.seenlog.add(i);var _=new p.Source(i,e,r?p.SourceKind.ENTRY:t.startsWith(a.LIBRARY_PREFIX)&&t.indexOf(a.PATH_DELIMITER,a.LIBRARY_PREFIX.length)<0?p.SourceKind.LIBRARY:p.SourceKind.DEFAULT);s.push(_),_.normalizedPath==u&&_.set(a.CommonFlags.BUILTIN);var d=new o.Tokenizer(_,n.diagnostics);d.onComment=this.onComment,_.tokenizer=d;for(var 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o.Token.CONST:if(e.next(),r|=a.CommonFlags.CONST,e.skip(o.Token.ENUM)){y=this.parseEnum(e,r,i,n);break}y=this.parseVariable(e,r,i,n),i=null;break;case o.Token.LET:r|=a.CommonFlags.LET;case o.Token.VAR:e.next(),y=this.parseVariable(e,r,i,n),i=null;break;case o.Token.ENUM:e.next(),y=this.parseEnum(e,r,i,n),i=null;break;case o.Token.FUNCTION:e.next(),y=this.parseFunction(e,r,i,n),i=null;break;case o.Token.ABSTRACT:if(e.next(),r|=a.CommonFlags.ABSTRACT,!e.skip(o.Token.CLASS)){this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"class");break}case o.Token.CLASS:e.next(),y=this.parseClass(e,r,i,n),i=null;break;case o.Token.NAMESPACE:e.next(),y=this.parseNamespace(e,r,i,n),i=null;break;case o.Token.IMPORT:e.next(),y=(r|=a.CommonFlags.IMPORT)&a.CommonFlags.EXPORT?this.parseExportImport(e,n):this.parseImport(e);break;case o.Token.TYPE:e.next(),y=this.parseTypeDeclaration(e,r,i,n),i=null;break;default:r&a.CommonFlags.EXPORT?y=this.parseExport(e,r,n):(_&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(h,_),"export"),t||(y=this.parseStatement(e,!0)))}if(i)for(var g=0,E=i.length;g<E;++g)this.error(s.DiagnosticCode.Decorators_are_not_valid_here,i[g].range);return y},t.prototype.nextFile=function(){var e=this.backlog;return e.length?e.shift():null},t.prototype.finish=function(){if(this.backlog.length)throw new Error("backlog is not empty");return this.backlog=[],this.seenlog.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==o.Token.VOID)return p.Node.createType(p.Node.createIdentifierExpression("void",e.range()),[],!1,e.range(a,e.pos));if(i==o.Token.OPENPAREN){var c=e.skip(o.Token.OPENPAREN),u=this.tryParseSignature(e);if(u){if(c){if(!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),null;if(!e.skip(o.Token.BAR))return this.error(s.DiagnosticCode._0_expected,e.range(),"|"),null;e.skip(o.Token.NULL)||this.error(s.DiagnosticCode._0_expected,e.range(),"null"),u.isNullable=!0}return u}if(c||this.tryParseSignatureIsSignature)return this.error(s.DiagnosticCode.Unexpected_token,e.range()),null;if(!t)return this.error(s.DiagnosticCode.Unexpected_token,e.range()),null;var l=this.parseType(e,!1,r);if(!l)return null;if(!e.skip(o.Token.CLOSEPAREN))return r||this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"}"),null;(n=l).range.start=a,n.range.end=e.pos}else if(i==o.Token.THIS)n=p.Node.createType(p.Node.createThisExpression(e.range()),[],!1,e.range(a,e.pos));else if(i==o.Token.TRUE||i==o.Token.FALSE)n=p.Node.createType(p.Node.createIdentifierExpression("bool",e.range()),[],!1,e.range(a,e.pos));else if(i==o.Token.STRINGLITERAL)e.readString(),n=p.Node.createType(p.Node.createIdentifierExpression("string",e.range()),[],!1,e.range(a,e.pos));else{if(i!=o.Token.IDENTIFIER)return r||this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var h=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),_=new Array,d=!1;if(e.skip(o.Token.LESSTHAN)){do{var y=this.parseType(e,!0,r);if(!y)return null;_.push(y)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.GREATERTHAN))return r||this.error(s.DiagnosticCode._0_expected,e.range(e.pos),">"),null}if(e.skip(o.Token.BAR)){if(!e.skip(o.Token.NULL))return r||this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"null"),null;d=!0}n=p.Node.createType(h,_,d,e.range(a,e.pos))}for(;e.skip(o.Token.OPENBRACKET);){var m=e.tokenPos;if(!e.skip(o.Token.CLOSEBRACKET))return r||this.error(s.DiagnosticCode._0_expected,e.range(),"]"),null;var g=e.range(m,e.pos);d=!1;if(e.skip(o.Token.BAR)){if(!e.skip(o.Token.NULL))return r||this.error(s.DiagnosticCode._0_expected,e.range(),"null"),null;d=!0}if(n=p.Node.createType(p.Node.createIdentifierExpression("Array",g),[n],d,e.range(a,e.pos)),d)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(o.Token.CLOSEPAREN))c=!0,e.discard(r),i=[];else{c=!1;do{var u=p.ParameterKind.DEFAULT;if(e.skip(o.Token.DOT_DOT_DOT)&&(c=!0,e.discard(r),u=p.ParameterKind.REST),e.skip(o.Token.THIS)){if(!e.skip(o.Token.COLON))return e.reset(r),this.tryParseSignatureIsSignature=!1,null;c=!0,e.discard(r);var l=this.parseType(e,!1);if(!l)return null;if(l.kind!=p.NodeKind.TYPE)return this.error(s.DiagnosticCode.Operation_not_supported,l.range),this.tryParseSignatureIsSignature=!0,null;a=l}else{if(!e.skip(o.Token.IDENTIFIER))return c?this.error(s.DiagnosticCode.Identifier_expected,e.range()):e.reset(r),this.tryParseSignatureIsSignature=c,null;var h=p.Node.createIdentifierExpression(e.readIdentifier(),e.range(e.tokenPos,e.pos));if(e.skip(o.Token.QUESTION)&&(c=!0,e.discard(r),u==p.ParameterKind.REST?this.error(s.DiagnosticCode.A_rest_parameter_cannot_be_optional,e.range()):u=p.ParameterKind.OPTIONAL),e.skip(o.Token.COLON)){c=!0,e.discard(r);var _=this.parseType(e);if(!_)return this.tryParseSignatureIsSignature=c,null;var d=new p.ParameterNode;d.parameterKind=u,d.name=h,d.type=_,i?i.push(d):i=[d]}else c&&this.error(s.DiagnosticCode.Type_expected,e.range())}}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),this.tryParseSignatureIsSignature=c,null}return e.skip(o.Token.EQUALS_GREATERTHAN)?(c=!0,e.discard(r),(t=this.parseType(e))?(this.tryParseSignatureIsSignature=!0,p.Node.createSignature(i||[],t,a,!1,e.range(n,e.pos))):(this.tryParseSignatureIsSignature=c,null)):(c?this.error(s.DiagnosticCode._0_expected,e.range(),"=>"):e.reset(r),this.tryParseSignatureIsSignature=c,null)},t.prototype.parseDecorator=function(e){var t=e.tokenPos;if(e.skip(o.Token.IDENTIFIER)){for(var r=e.readIdentifier(),n=p.Node.createIdentifierExpression(r,e.range(t,e.pos));e.skip(o.Token.DOT);){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;r=e.readIdentifier(),n=p.Node.createPropertyAccessExpression(n,p.Node.createIdentifierExpression(r,e.range()),e.range(t,e.pos))}var i=void 0;if(!e.skip(o.Token.OPENPAREN))return p.Node.createDecorator(n,null,e.range(t,e.pos));if(i=this.parseArguments(e))return p.Node.createDecorator(n,i,e.range(t,e.pos))}else this.error(s.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(o.Token.COMMA));var s=p.Node.createVariableStatement(i,r,t,e.range(n,e.pos));return e.skip(o.Token.SEMICOLON),s},t.prototype.parseVariableDeclaration=function(e,t,r){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var n=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),i=t,c=null;e.skip(o.Token.COLON)&&(c=this.parseType(e));var u=null;if(e.skip(o.Token.EQUALS)){if(i&a.CommonFlags.AMBIENT&&this.error(s.DiagnosticCode.Initializers_are_not_allowed_in_ambient_contexts,e.range()),!(u=this.parseExpression(e,1)))return null}else i&a.CommonFlags.CONST?i&a.CommonFlags.AMBIENT||this.error(s.DiagnosticCode._const_declarations_must_be_initialized,n.range):c||this.error(s.DiagnosticCode.Type_expected,e.range(e.pos));return p.Node.createVariableDeclaration(n,c,u,r,i,o.Range.join(n.range,e.range()))},t.prototype.parseEnum=function(e,t,r,n){if(e.next()!=o.Token.IDENTIFIER)return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.next()!=o.Token.OPENBRACE)return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null;var c=new Array;if(!e.skip(o.Token.CLOSEBRACE)){do{var u=this.parseEnumValue(e,a.CommonFlags.NONE);if(!u)return null;c.push(u)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"}"),null}var l=p.Node.createEnumDeclaration(i,c,r,t,e.range(n,e.pos));return e.skip(o.Token.SEMICOLON),l},t.prototype.parseEnumValue=function(e,t){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var r=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),n=null;return e.skip(o.Token.EQUALS)&&!(n=this.parseExpression(e,1))?null:p.Node.createEnumValueDeclaration(r,n,t,o.Range.join(r.range,e.range()))},t.prototype.parseReturn=function(e){var t=null;if(e.peek(!0)!=o.Token.SEMICOLON&&e.nextToken!=o.Token.CLOSEBRACE&&!e.nextTokenOnNewLine&&!(t=this.parseExpression(e)))return null;var r=p.Node.createReturnStatement(t,e.range());return e.skip(o.Token.SEMICOLON),r},t.prototype.parseTypeParameters=function(e){var t=new Array;if(e.skip(o.Token.GREATERTHAN))this.error(s.DiagnosticCode.Type_parameter_list_cannot_be_empty,e.range());else{do{var r=this.parseTypeParameter(e);if(!r)return null;t.push(r)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.GREATERTHAN))return this.error(s.DiagnosticCode._0_expected,e.range(),">"),null}return t},t.prototype.parseTypeParameter=function(e){if(e.next()==o.Token.IDENTIFIER){var t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),r=null;if(e.skip(o.Token.EXTENDS)){var n=this.parseType(e);if(!n)return null;if(n.kind!=p.NodeKind.TYPE)return this.error(s.DiagnosticCode.Operation_not_supported,n.range),null;r=n}return p.Node.createTypeParameter(t,r,o.Range.join(t.range,e.range()))}return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseParameters=function(e){var t=new Array,r=null,n=!1,i=!1;if(e.peek()!=o.Token.CLOSEPAREN)do{var a=this.parseParameter(e);if(!a)return null;switch(r&&!i&&(this.error(s.DiagnosticCode.A_rest_parameter_must_be_last_in_a_parameter_list,r.name.range),i=!0),a.parameterKind){default:n&&this.error(s.DiagnosticCode.A_required_parameter_cannot_follow_an_optional_parameter,a.name.range);break;case p.ParameterKind.OPTIONAL:n=!0;break;case p.ParameterKind.REST:r=a}t.push(a)}while(e.skip(o.Token.COMMA));return e.skip(o.Token.CLOSEPAREN)?t:(this.error(s.DiagnosticCode._0_expected,e.range(),")"),null)},t.prototype.parseParameter=function(e,t){void 0===t&&(t=!1);var r=!1,n=!1,i=null;if(e.skip(o.Token.DOT_DOT_DOT)&&(r=!0,i=e.range()),e.skip(o.Token.IDENTIFIER)){r||(i=e.range());var a=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),c=null;if((n=e.skip(o.Token.QUESTION))&&r&&this.error(s.DiagnosticCode.A_rest_parameter_cannot_be_optional,a.range),e.skip(o.Token.COLON)){if(!(c=this.parseType(e)))return null}else c=p.Node.createOmittedType(e.range(e.pos));var u=null;return!e.skip(o.Token.EQUALS)||(r&&this.error(s.DiagnosticCode.A_rest_parameter_cannot_have_an_initializer,a.range),n?this.error(s.DiagnosticCode.Parameter_cannot_have_question_mark_and_initializer,a.range):n=!0,u=this.parseExpression(e,1))?p.Node.createParameter(a,c,u,r?p.ParameterKind.REST:n?p.ParameterKind.OPTIONAL:p.ParameterKind.DEFAULT,o.Range.join(i,e.range())):null}return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseFunction=function(e,t,r,n){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range(e.pos)),null;var i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),c=-1,u=null;if(e.skip(o.Token.LESSTHAN)){if(c=e.tokenPos,!(u=this.parseTypeParameters(e)))return null;t|=a.CommonFlags.GENERIC}if(!e.skip(o.Token.OPENPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"("),null;c<0&&(c=e.tokenPos);var l=this.parseParameters(e);if(!l)return null;var h=0!=(t&a.CommonFlags.SET);h&&(1!=l.length&&this.error(s.DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,i.range),l.length&&l[0].initializer&&this.error(s.DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,i.range)),t&a.CommonFlags.GET&&l.length&&this.error(s.DiagnosticCode.A_get_accessor_cannot_have_parameters,i.range);var _=null;if(e.skip(o.Token.COLON)&&!(_=this.parseType(e,!0,h)))return null;_||(_=p.Node.createOmittedType(e.range(e.pos)),h||this.error(s.DiagnosticCode.Type_expected,_.range));var d=p.Node.createSignature(l,_,null,!1,e.range(c,e.pos)),y=null;if(e.skip(o.Token.OPENBRACE)){if(t&a.CommonFlags.AMBIENT&&this.error(s.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,e.range()),!(y=this.parseBlockStatement(e,!1)))return null}else t&a.CommonFlags.AMBIENT||this.error(s.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,e.range(e.pos));var m=p.Node.createFunctionDeclaration(i,u,d,y,r,t,e.range(n,e.pos));return e.skip(o.Token.SEMICOLON),m},t.prototype.parseFunctionExpression=function(e){var t,r=e.tokenPos,n=!1;if(e.token==o.Token.FUNCTION){if(t=e.skip(o.Token.IDENTIFIER)?p.Node.createIdentifierExpression(e.readIdentifier(),e.range()):p.Node.createEmptyIdentifierExpression(e.range(e.pos)),!e.skip(o.Token.OPENPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"("),null}else n=!0,assert(e.token==o.Token.OPENPAREN),t=p.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,i,c){void 0===i&&(i=-1),void 0===c&&(c=-1),i<0&&(i=t.range.start),c<0&&(c=i);var u=null;if(e.skip(o.Token.COLON)){if(!(u=this.parseType(e)))return null}else u=p.Node.createOmittedType(e.range(e.pos)),this.error(s.DiagnosticCode.Type_expected,u.range);if(n&&!e.skip(o.Token.EQUALS_GREATERTHAN))return this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"=>"),null;var l,h=p.Node.createSignature(r,u,null,!1,e.range(c,e.pos));if(n)l=this.parseStatement(e,!1);else{if(!e.skip(o.Token.OPENBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"{"),null;l=this.parseBlockStatement(e,!1)}if(!l)return null;var _=p.Node.createFunctionDeclaration(t,null,h,l,null,n?a.CommonFlags.ARROW:a.CommonFlags.NONE,e.range(i,e.pos));return p.Node.createFunctionExpression(_)},t.prototype.parseClass=function(e,t,r,n){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var i,c=p.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.skip(o.Token.LESSTHAN)){if(!(i=this.parseTypeParameters(e)))return null;t|=a.CommonFlags.GENERIC}else i=[];var u=null;if(e.skip(o.Token.EXTENDS)){var l=this.parseType(e);if(!l)return null;if(l.kind!=p.NodeKind.TYPE)return this.error(s.DiagnosticCode.Operation_not_supported,l.range),null;u=l}var h=new Array;if(e.skip(o.Token.IMPLEMENTS))do{var _=this.parseType(e);if(!_)return null;h.push(_)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.OPENBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null;var d=new Array;if(!e.skip(o.Token.CLOSEBRACE))do{var y=this.parseClassMember(e,t);if(!y)return null;d.push(y)}while(!e.skip(o.Token.CLOSEBRACE));return p.Node.createClassDeclaration(c,i,u,h,d,r,t,e.range(n,e.pos))},t.prototype.parseClassMember=function(e,t){for(var r=e.pos,n=new Array;e.skip(o.Token.AT);){var i=this.parseDecorator(e);if(!i)break;n.push(i)}var c=t&a.CommonFlags.AMBIENT;e.skip(o.Token.PUBLIC)?c|=a.CommonFlags.PUBLIC:e.skip(o.Token.PRIVATE)?c|=a.CommonFlags.PRIVATE:e.skip(o.Token.PROTECTED)&&(c|=a.CommonFlags.PROTECTED);var u=0,l=0,h=0,_=0;e.skip(o.Token.STATIC)?(c|=a.CommonFlags.STATIC,u=e.tokenPos,l=e.pos):(e.skip(o.Token.ABSTRACT)?(c|=a.CommonFlags.ABSTRACT|a.CommonFlags.INSTANCE,h=e.tokenPos,_=e.pos):c|=a.CommonFlags.INSTANCE,t&a.CommonFlags.GENERIC&&(c|=a.CommonFlags.GENERIC_CONTEXT));var d=0,y=0;e.skip(o.Token.READONLY)&&(c|=a.CommonFlags.READONLY,d=e.tokenPos,y=e.pos);var m=e.mark(),g=!1,E=!1,T=!1,f=0,A=0;if(e.skip(o.Token.GET)?e.peek(!0,!0)!=o.Token.IDENTIFIER||e.nextTokenOnNewLine?e.reset(m):(c|=a.CommonFlags.GET,E=!0,f=e.tokenPos,A=e.pos,c&a.CommonFlags.READONLY&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(d,y),"readonly")):e.skip(o.Token.SET)?e.peek(!0,!0)!=o.Token.IDENTIFIER||e.nextTokenOnNewLine?e.reset(m):(c|=a.CommonFlags.SET|a.CommonFlags.SET,T=!0,f=e.tokenPos,A=e.pos,c&a.CommonFlags.READONLY&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(d,y),"readonly")):e.skip(o.Token.CONSTRUCTOR)&&(g=!0,(c|=a.CommonFlags.CONSTRUCTOR)&a.CommonFlags.STATIC&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(u,l),"static"),c&a.CommonFlags.ABSTRACT&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(h,_),"abstract"),c&a.CommonFlags.READONLY&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(d,y),"readonly")),!g&&!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var I=g?p.Node.createConstructorExpression(e.range()):p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),v=null;if(e.skip(o.Token.LESSTHAN)){var N=e.tokenPos;if(!(v=this.parseTypeParameters(e)))return null;g?this.error(s.DiagnosticCode.Type_parameters_cannot_appear_on_a_constructor_declaration,e.range(N,e.pos)):E||T?this.error(s.DiagnosticCode.An_accessor_cannot_have_type_parameters,e.range(N,e.pos)):c|=a.CommonFlags.GENERIC}if(e.skip(o.Token.OPENPAREN)){var C=e.tokenPos,S=this.parseParameters(e);if(!S)return null;E?S.length&&this.error(s.DiagnosticCode.A_get_accessor_cannot_have_parameters,I.range):T&&(1!=S.length&&this.error(s.DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,I.range),S.length&&S[0].initializer&&this.error(s.DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,I.range));var b=null;if(e.skip(o.Token.COLON)){if(I.kind==p.NodeKind.CONSTRUCTOR?this.error(s.DiagnosticCode.Type_annotation_cannot_appear_on_a_constructor_declaration,e.range()):T&&this.error(s.DiagnosticCode.A_set_accessor_cannot_have_a_return_type_annotation,e.range()),!(b=this.parseType(e,I.kind==p.NodeKind.CONSTRUCTOR||T)))return null}else b=p.Node.createOmittedType(e.range(e.pos)),T||I.kind==p.NodeKind.CONSTRUCTOR||this.error(s.DiagnosticCode.Type_expected,b.range);var O=p.Node.createSignature(S,b,null,!1,e.range(C,e.pos)),L=null;if(e.skip(o.Token.OPENBRACE)){if(c&a.CommonFlags.AMBIENT&&this.error(s.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,e.range()),!(L=this.parseBlockStatement(e,!1)))return null}else c&a.CommonFlags.AMBIENT||this.error(s.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,e.range());var k=p.Node.createMethodDeclaration(I,v,O,L,n,c,e.range(r,e.pos));return e.skip(o.Token.SEMICOLON),k}if(g)this.error(s.DiagnosticCode.Constructor_implementation_is_missing,I.range);else{if(!E&&!T){c&a.CommonFlags.ABSTRACT&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(h,_),"abstract"),c&a.CommonFlags.GET&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(0,0),"get"),c&a.CommonFlags.SET&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(f,A),"set");var x=null;if(e.skip(o.Token.COLON)){if(!(x=this.parseType(e)))return null}else this.error(s.DiagnosticCode.Type_expected,e.range());var R=null;if(e.skip(o.Token.EQUALS)&&!(R=this.parseExpression(e)))return null;var B=p.Node.createFieldDeclaration(I,x,R,n,c,e.range(r,e.pos));return e.skip(o.Token.SEMICOLON),B}this.error(s.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,I.range)}return null},t.prototype.parseNamespace=function(e,t,r,n){if(e.skip(o.Token.IDENTIFIER)){var i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.skip(o.Token.OPENBRACE)){for(var a=new Array,c=p.Node.createNamespaceDeclaration(i,a,r,t,e.range(n,e.pos));!e.skip(o.Token.CLOSEBRACE);){var u=this.parseTopLevelStatement(e,c);if(!u)return null;u.parent=c,a.push(u)}return e.skip(o.Token.SEMICOLON),c}this.error(s.DiagnosticCode._0_expected,e.range(),"{")}else this.error(s.DiagnosticCode.Identifier_expected,e.range());return null},t.prototype.parseExport=function(e,t,r){if(e.skip(o.Token.OPENBRACE)){var n=new Array;if(!e.skip(o.Token.CLOSEBRACE)){do{var i=this.parseExportMember(e);if(!i)return null;n.push(i)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"}"),null}var a=null;if(e.skip(o.Token.FROM)){if(!e.skip(o.Token.STRINGLITERAL))return this.error(s.DiagnosticCode.String_literal_expected,e.range()),null;a=p.Node.createStringLiteralExpression(e.readString(),e.range())}var c=p.Node.createExportStatement(n,a,t,e.range(r,e.pos));return c.normalizedPath&&!this.seenlog.has(c.normalizedPath)&&(this.backlog.push(c.normalizedPath),this.seenlog.add(c.normalizedPath)),e.skip(o.Token.SEMICOLON),c}return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null},t.prototype.parseExportMember=function(e){if(e.skip(o.Token.IDENTIFIER)){var t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),r=null;if(e.skip(o.Token.AS)){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;r=p.Node.createIdentifierExpression(e.readIdentifier(),e.range())}return p.Node.createExportMember(t,r,r?o.Range.join(t.range,r.range):t.range)}return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseImport=function(e){var t=e.tokenPos,r=null,n=null,i=!1;if(e.skip(o.Token.OPENBRACE)){if(r=new Array,!e.skip(o.Token.CLOSEBRACE)){do{var a=this.parseImportDeclaration(e);if(!a)return null;r.push(a)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"}"),null}}else if(e.skip(o.Token.ASTERISK)){if(!e.skip(o.Token.AS))return this.error(s.DiagnosticCode._0_expected,e.range(),"as"),null;if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;n=p.Node.createIdentifierExpression(e.readIdentifier(),e.range())}else i=!0;if(i||e.skip(o.Token.FROM)){if(e.skip(o.Token.STRINGLITERAL)){var c=p.Node.createStringLiteralExpression(e.readString(),e.range()),u=void 0;return n?(assert(!r),u=p.Node.createImportStatementWithWildcard(n,c,e.range(t,e.pos))):u=p.Node.createImportStatement(r,c,e.range(t,e.pos)),this.seenlog.has(u.normalizedPath)||(this.backlog.push(u.normalizedPath),this.seenlog.add(u.normalizedPath)),e.skip(o.Token.SEMICOLON),u}this.error(s.DiagnosticCode.String_literal_expected,e.range())}else this.error(s.DiagnosticCode._0_expected,e.range(),"from");return null},t.prototype.parseImportDeclaration=function(e){if(e.skip(o.Token.IDENTIFIER)){var t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),r=null;if(e.skip(o.Token.AS)){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;r=p.Node.createIdentifierExpression(e.readIdentifier(),e.range())}return p.Node.createImportDeclaration(t,r,r?o.Range.join(t.range,r.range):t.range)}return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseExportImport=function(e,t){if(e.skip(o.Token.IDENTIFIER)){var r=p.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.skip(o.Token.EQUALS)){if(e.skip(o.Token.IDENTIFIER)){var n=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),i=p.Node.createExportImportStatement(n,r,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),i}this.error(s.DiagnosticCode.Identifier_expected,e.range())}else this.error(s.DiagnosticCode._0_expected,e.range(),"=")}else this.error(s.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 o.Token.BREAK:n=this.parseBreak(e);break;case o.Token.CONST:n=this.parseVariable(e,a.CommonFlags.CONST,null,e.tokenPos);break;case o.Token.CONTINUE:n=this.parseContinue(e);break;case o.Token.DO:n=this.parseDoStatement(e);break;case o.Token.FOR:n=this.parseForStatement(e);break;case o.Token.IF:n=this.parseIfStatement(e);break;case o.Token.LET:n=this.parseVariable(e,a.CommonFlags.LET,null,e.tokenPos);break;case o.Token.VAR:n=this.parseVariable(e,a.CommonFlags.NONE,null,e.tokenPos);break;case o.Token.OPENBRACE:n=this.parseBlockStatement(e,t);break;case o.Token.RETURN:t&&this.error(s.DiagnosticCode.A_return_statement_can_only_be_used_within_a_function_body,e.range()),n=this.parseReturn(e);break;case o.Token.SEMICOLON:return p.Node.createEmptyStatement(e.range(e.tokenPos));case o.Token.SWITCH:n=this.parseSwitchStatement(e);break;case o.Token.THROW:n=this.parseThrowStatement(e);break;case o.Token.TRY:n=this.parseTryStatement(e);break;case o.Token.TYPE:n=this.parseTypeDeclaration(e,a.CommonFlags.NONE,null,e.tokenPos);break;case o.Token.VOID:n=this.parseVoidStatement(e);break;case o.Token.WHILE:n=this.parseWhileStatement(e);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(o.Token.CLOSEBRACE);){var i=e.mark(),a=this.parseStatement(e,t);a?(e.discard(i),n.push(a)):(e.reset(i),this.skipStatement(e))}var s=p.Node.createBlockStatement(n,e.range(r,e.pos));return e.skip(o.Token.SEMICOLON),s},t.prototype.parseBreak=function(e){var t=null;e.peek(!0)!=o.Token.IDENTIFIER||e.nextTokenOnNewLine||(e.next(!0),t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()));var r=p.Node.createBreakStatement(t,e.range());return e.skip(o.Token.SEMICOLON),r},t.prototype.parseContinue=function(e){var t=null;e.peek(!0)!=o.Token.IDENTIFIER||e.nextTokenOnNewLine||(e.next(!0),t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()));var r=p.Node.createContinueStatement(t,e.range());return e.skip(o.Token.SEMICOLON),r},t.prototype.parseDoStatement=function(e){var t=e.tokenPos,r=this.parseStatement(e);if(!r)return null;if(e.skip(o.Token.WHILE))if(e.skip(o.Token.OPENPAREN)){var n=this.parseExpression(e);if(!n)return null;if(e.skip(o.Token.CLOSEPAREN)){var i=p.Node.createDoStatement(r,n,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),i}this.error(s.DiagnosticCode._0_expected,e.range(),")")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");else this.error(s.DiagnosticCode._0_expected,e.range(),"while");return null},t.prototype.parseExpressionStatement=function(e){var t=this.parseExpression(e);if(!t)return null;var r=p.Node.createExpressionStatement(t);return e.skip(o.Token.SEMICOLON),r},t.prototype.parseForStatement=function(e){var t=e.tokenPos;if(e.skip(o.Token.OPENPAREN)){var r=null;if(e.skip(o.Token.CONST))r=this.parseVariable(e,a.CommonFlags.CONST,null,e.tokenPos);else if(e.skip(o.Token.LET))r=this.parseVariable(e,a.CommonFlags.LET,null,e.tokenPos);else if(e.skip(o.Token.VAR))r=this.parseVariable(e,a.CommonFlags.NONE,null,e.tokenPos);else if(!e.skip(o.Token.SEMICOLON)&&!(r=this.parseExpressionStatement(e)))return null;if(e.token==o.Token.SEMICOLON){var n=null;if(!e.skip(o.Token.SEMICOLON)&&!(n=this.parseExpressionStatement(e)))return null;if(e.token==o.Token.SEMICOLON){var i=null;if(!e.skip(o.Token.CLOSEPAREN)){if(!(i=this.parseExpression(e)))return null;if(!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),null}var c=this.parseStatement(e);return c?p.Node.createForStatement(r,n?n.expression:null,i,c,e.range(t,e.pos)):null}this.error(s.DiagnosticCode._0_expected,e.range(),";")}else this.error(s.DiagnosticCode._0_expected,e.range(),";")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseIfStatement=function(e){var t=e.tokenPos;if(e.skip(o.Token.OPENPAREN)){var r=this.parseExpression(e);if(!r)return null;if(e.skip(o.Token.CLOSEPAREN)){var n=this.parseStatement(e);if(!n)return null;var i=null;return e.skip(o.Token.ELSE)&&!(i=this.parseStatement(e))?null:p.Node.createIfStatement(r,n,i,e.range(t,e.pos))}this.error(s.DiagnosticCode._0_expected,e.range(),")")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseSwitchStatement=function(e){var t=e.tokenPos;if(e.skip(o.Token.OPENPAREN)){var r=this.parseExpression(e);if(!r)return null;if(e.skip(o.Token.CLOSEPAREN)){if(e.skip(o.Token.OPENBRACE)){for(var n=new Array;!e.skip(o.Token.CLOSEBRACE);){var i=this.parseSwitchCase(e);if(!i)return null;n.push(i)}var a=p.Node.createSwitchStatement(r,n,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),a}this.error(s.DiagnosticCode._0_expected,e.range(),"{")}else this.error(s.DiagnosticCode._0_expected,e.range(),")")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseSwitchCase=function(e){var t,r,n=e.tokenPos;if(e.skip(o.Token.CASE)){var i=this.parseExpression(e);if(!i)return null;if(e.skip(o.Token.COLON)){for(t=new Array;e.peek()!=o.Token.CASE&&e.nextToken!=o.Token.DEFAULT&&e.nextToken!=o.Token.CLOSEBRACE;){if(!(r=this.parseStatement(e)))return null;t.push(r)}return p.Node.createSwitchCase(i,t,e.range(n,e.pos))}this.error(s.DiagnosticCode._0_expected,e.range(),":")}else if(e.skip(o.Token.DEFAULT)){if(e.skip(o.Token.COLON)){for(t=new Array;e.peek()!=o.Token.CASE&&e.nextToken!=o.Token.DEFAULT&&e.nextToken!=o.Token.CLOSEBRACE;){if(!(r=this.parseStatement(e)))return null;t.push(r)}return p.Node.createSwitchCase(null,t,e.range(n,e.pos))}this.error(s.DiagnosticCode._0_expected,e.range(),":")}else this.error(s.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=p.Node.createThrowStatement(r,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),n},t.prototype.parseTryStatement=function(e){var t,r=e.tokenPos;if(e.skip(o.Token.OPENBRACE)){for(var n=new Array;!e.skip(o.Token.CLOSEBRACE);){if(!(t=this.parseStatement(e)))return null;n.push(t)}var i=null,a=null,c=null;if(e.skip(o.Token.CATCH)){if(!e.skip(o.Token.OPENPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),"("),null;if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;if(i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),null;if(!e.skip(o.Token.OPENBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null;for(a=[];!e.skip(o.Token.CLOSEBRACE);){if(!(t=this.parseStatement(e)))return null;a.push(t)}}if(e.skip(o.Token.FINALLY)){if(!e.skip(o.Token.OPENBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null;for(c=[];!e.skip(o.Token.CLOSEBRACE);){if(!(t=this.parseStatement(e)))return null;c.push(t)}}if(!a&&!c)return this.error(s.DiagnosticCode._0_expected,e.range(),"catch"),null;var u=p.Node.createTryStatement(n,i,a,c,e.range(r,e.pos));return e.skip(o.Token.SEMICOLON),u}return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null},t.prototype.parseTypeDeclaration=function(e,t,r,n){if(e.skip(o.Token.IDENTIFIER)){var i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),c=null;if(e.skip(o.Token.LESSTHAN)){if(!(c=this.parseTypeParameters(e)))return null;t|=a.CommonFlags.GENERIC}if(e.skip(o.Token.EQUALS)){var u=this.parseType(e);if(!u)return null;var l=p.Node.createTypeDeclaration(i,c,u,r,t,e.range(n,e.pos));return e.skip(o.Token.SEMICOLON),l}this.error(s.DiagnosticCode._0_expected,e.range(),"=")}else this.error(s.DiagnosticCode.Identifier_expected,e.range());return null},t.prototype.parseVoidStatement=function(e){var t=e.tokenPos,r=this.parseExpression(e,20);if(!r)return null;var n=p.Node.createVoidStatement(r,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),n},t.prototype.parseWhileStatement=function(e){var t=e.tokenPos;if(e.skip(o.Token.OPENPAREN)){var r=this.parseExpression(e);if(!r)return null;if(e.skip(o.Token.CLOSEPAREN)){var n=this.parseStatement(e);if(!n)return null;var i=p.Node.createWhileStatement(r,n,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),i}this.error(s.DiagnosticCode._0_expected,e.range(),")")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseExpressionStart=function(e){var t=e.next(!0),r=e.tokenPos,n=null;if(t==o.Token.NULL)return p.Node.createNullExpression(e.range());if(t==o.Token.TRUE)return p.Node.createTrueExpression(e.range());if(t==o.Token.FALSE)return p.Node.createFalseExpression(e.range());var i=function(e){switch(e){case o.Token.DOT_DOT_DOT:return 1;case o.Token.YIELD:return 2;case o.Token.EXCLAMATION:case o.Token.TILDE:case o.Token.PLUS:case o.Token.MINUS:case o.Token.PLUS_PLUS:case o.Token.MINUS_MINUS:case o.Token.TYPEOF:case o.Token.VOID:case o.Token.DELETE:return 16;case o.Token.NEW:return 19;default:return-1}}(t);if(-1!=i){var a=void 0;return t==o.Token.NEW?(a=this.parseExpression(e,18))?a.kind==p.NodeKind.CALL?p.Node.createNewExpression(a.expression,a.typeArguments,a.arguments,e.range(r,e.pos)):(this.error(s.DiagnosticCode.Operation_not_supported,e.range()),null):null:(a=this.parseExpression(e,i))?(t!=o.Token.PLUS_PLUS&&t!=o.Token.MINUS_MINUS||a.kind!=p.NodeKind.IDENTIFIER&&a.kind!=p.NodeKind.ELEMENTACCESS&&a.kind!=p.NodeKind.PROPERTYACCESS&&this.error(s.DiagnosticCode.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access,a.range),p.Node.createUnaryPrefixExpression(t,a,e.range(r,e.pos))):null}switch(t){case o.Token.OPENPAREN:if(e.skip(o.Token.CLOSEPAREN))return this.parseFunctionExpressionCommon(e,p.Node.createEmptyIdentifierExpression(e.range(r)),[],!0);var c=e.mark(),u=!0;do{switch(e.next(!0)){case o.Token.DOT_DOT_DOT:return e.reset(c),this.parseFunctionExpression(e);case o.Token.IDENTIFIER:switch(e.readIdentifier(),e.next()){case o.Token.CLOSEPAREN:if(!e.skip(o.Token.EQUALS_GREATERTHAN)){u=!1;break}case o.Token.COLON:return e.reset(c),this.parseFunctionExpression(e);case o.Token.QUESTION:case o.Token.COMMA:break;default:u=!1}break;default:u=!1}}while(u);return e.reset(c),(n=this.parseExpression(e))?e.skip(o.Token.CLOSEPAREN)?p.Node.createParenthesizedExpression(n,e.range(r,e.pos)):(this.error(s.DiagnosticCode._0_expected,e.range(),")"),null):null;case o.Token.OPENBRACKET:var l=new Array;if(!e.skip(o.Token.CLOSEBRACKET)){do{if(e.peek()==o.Token.COMMA)n=null;else if(!(n=this.parseExpression(e,1)))return null;if(l.push(n),e.peek()==o.Token.CLOSEBRACKET)break}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEBRACKET))return this.error(s.DiagnosticCode._0_expected,e.range(),"]"),null}return p.Node.createArrayLiteralExpression(l,e.range(r,e.pos));case o.Token.LESSTHAN:var h=this.parseType(e);return h?e.skip(o.Token.GREATERTHAN)?(n=this.parseExpression(e,18))?p.Node.createAssertionExpression(p.AssertionKind.PREFIX,n,h,e.range(r,e.pos)):null:(this.error(s.DiagnosticCode._0_expected,e.range(),">"),null):null;case o.Token.IDENTIFIER:return p.Node.createIdentifierExpression(e.readIdentifier(),e.range(r,e.pos));case o.Token.THIS:return p.Node.createThisExpression(e.range(r,e.pos));case o.Token.CONSTRUCTOR:return p.Node.createConstructorExpression(e.range(r,e.pos));case o.Token.SUPER:return p.Node.createSuperExpression(e.range(r,e.pos));case o.Token.STRINGLITERAL:return p.Node.createStringLiteralExpression(e.readString(),e.range(r,e.pos));case o.Token.INTEGERLITERAL:return p.Node.createIntegerLiteralExpression(e.readInteger(),e.range(r,e.pos));case o.Token.FLOATLITERAL:return p.Node.createFloatLiteralExpression(e.readFloat(),e.range(r,e.pos));case o.Token.SLASH:var _=e.readRegexpPattern();return e.skip(o.Token.SLASH)?p.Node.createRegexpLiteralExpression(_,e.readRegexpFlags(),e.range(r,e.pos)):(this.error(s.DiagnosticCode._0_expected,e.range(),"/"),null);case o.Token.FUNCTION:return this.parseFunctionExpression(e);default:return this.error(s.DiagnosticCode.Expression_expected,e.range()),null}},t.prototype.tryParseTypeArgumentsBeforeArguments=function(e){var t=e.mark();if(!e.skip(o.Token.LESSTHAN))return null;var r=new Array;do{var n=this.parseType(e,!0,!0);if(!n)return e.reset(t),null;r.push(n)}while(e.skip(o.Token.COMMA));return e.skip(o.Token.GREATERTHAN)&&e.skip(o.Token.OPENPAREN)?r:(e.reset(t),null)},t.prototype.parseArguments=function(e){var t=new Array;if(!e.skip(o.Token.CLOSEPAREN)){do{var r=this.parseExpression(e,1);if(!r)return null;t.push(r)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),null}return t},t.prototype.parseExpression=function(e,t){void 0===t&&(t=0);var r=this.parseExpressionStart(e);if(!r)return null;for(var n,i,a=r.range.start;(n=this.tryParseTypeArgumentsBeforeArguments(e))||e.skip(o.Token.OPENPAREN);){var c=this.parseArguments(e);if(!c)return null;r=p.Node.createCallExpression(r,n,c,e.range(a,e.pos))}for(var u,l=null;(u=h(i=e.peek()))>=t;)switch(e.next(),i){case o.Token.AS:var d=this.parseType(e);if(!d)return null;r=p.Node.createAssertionExpression(p.AssertionKind.AS,r,d,e.range(a,e.pos));break;case o.Token.OPENBRACKET:if(!(l=this.parseExpression(e)))return null;if(!e.skip(o.Token.CLOSEBRACKET))return this.error(s.DiagnosticCode._0_expected,e.range(),"]"),null;r=p.Node.createElementAccessExpression(r,l,e.range(a,e.pos));break;case o.Token.PLUS_PLUS:case o.Token.MINUS_MINUS:r.kind!=p.NodeKind.IDENTIFIER&&r.kind!=p.NodeKind.ELEMENTACCESS&&r.kind!=p.NodeKind.PROPERTYACCESS&&this.error(s.DiagnosticCode.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access,r.range),r=p.Node.createUnaryPostfixExpression(i,r,e.range(a,e.pos));break;case o.Token.QUESTION:var y=this.parseExpression(e);if(!y)return null;if(!e.skip(o.Token.COLON))return this.error(s.DiagnosticCode._0_expected,e.range(),":"),null;var m=this.parseExpression(e);if(!m)return null;r=p.Node.createTernaryExpression(r,y,m,e.range(a,e.pos));break;case o.Token.COMMA:var g=[r];do{if(!(r=this.parseExpression(e,1)))return null;g.push(r)}while(e.skip(o.Token.COMMA));r=p.Node.createCommaExpression(g,e.range(a,e.pos));break;default:if(!(l=this.parseExpression(e,_(i)?u:u+1)))return null;if(i==o.Token.DOT)if(l.kind==p.NodeKind.IDENTIFIER)r=p.Node.createPropertyAccessExpression(r,l,e.range(a,e.pos));else{if(l.kind!=p.NodeKind.CALL)return this.error(s.DiagnosticCode.Identifier_expected,l.range),null;var E=l;if(E.expression.kind!=p.NodeKind.IDENTIFIER)return this.error(s.DiagnosticCode.Identifier_expected,E.expression.range),null;E.expression=p.Node.createPropertyAccessExpression(r,E.expression,e.range(a,e.pos)),r=E}else r=p.Node.createBinaryExpression(i,r,l,e.range(a,e.pos))}return r},t.prototype.skipStatement=function(e){for(e.peek(!0),e.nextTokenOnNewLine&&e.next();;){var t=e.peek(!0);if(t==o.Token.ENDOFFILE||t==o.Token.CLOSEBRACE)break;if(t==o.Token.SEMICOLON){e.next();break}if(e.nextTokenOnNewLine)break;switch(e.next()){case o.Token.IDENTIFIER:e.readIdentifier();break;case o.Token.STRINGLITERAL:e.readString();break;case o.Token.INTEGERLITERAL:e.readInteger();break;case o.Token.FLOATLITERAL:e.readFloat()}}},t}(s.DiagnosticEmitter);function h(e){switch(e){case o.Token.COMMA:return 0;case o.Token.EQUALS:case o.Token.PLUS_EQUALS:case o.Token.MINUS_EQUALS:case o.Token.ASTERISK_ASTERISK_EQUALS:case 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n.UnaryOp.WrapI64:case n.UnaryOp.TruncF32ToI32:return this.push("<i32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF32ToI64:return this.push("<i64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF32ToU32:return this.push("<i32><u32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF32ToU64:return this.push("<i64><u64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF64ToI32:return this.push("<i32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF64ToI64:return this.push("<i64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF64ToU32:return this.push("<i32><u32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF64ToU64:return this.push("<i64><u64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ReinterpretF32:return this.push("reinterpret<f32,i32>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.ReinterpretF64:return this.push("reinterpret<f64,i64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.ConvertI32ToF32:return this.push("<f32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertI32ToF64:return this.push("<f64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertU32ToF32:return this.push("<f32><u32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertU32ToF64:return this.push("<f64><u32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertI64ToF32:return this.push("<f32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertI64ToF64:return this.push("<f64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertU64ToF32:return this.push("<f32><u64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertU64ToF64:return this.push("<f64><u64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.PromoteF32:return this.push("<f64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.DemoteF64:return this.push("<f32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ReinterpretI32:return this.push("reinterpret<i32,f32>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.ReinterpretI64:return this.push("reinterpret<i64,f64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")")}break;case n.ExpressionId.Binary:switch(_BinaryenBinaryGetOp(e)){case n.BinaryOp.AddI32:case n.BinaryOp.AddI64:case n.BinaryOp.AddF32:case n.BinaryOp.AddF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" + "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.SubI32:case n.BinaryOp.SubI64:case n.BinaryOp.SubF32:case n.BinaryOp.SubF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" - "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.MulI32:case n.BinaryOp.MulI64:case n.BinaryOp.MulF32:case n.BinaryOp.MulF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" * "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.DivI32:case n.BinaryOp.DivI64:case n.BinaryOp.DivF32:case n.BinaryOp.DivF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" / "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.DivU32:return this.push("<i32>(<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" / <u32>"),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.RemI32:case n.BinaryOp.RemI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" % "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.RemU32:return this.push("<i32>(<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" / <u32>"),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.AndI32:case n.BinaryOp.AndI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" & "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.OrI32:case n.BinaryOp.OrI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" | "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.XorI32:case n.BinaryOp.XorI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" ^ "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.ShlI32:case n.BinaryOp.ShlI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" << "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.ShrU32:case n.BinaryOp.ShrU64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >>> "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.ShrI32:case n.BinaryOp.ShrI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >> "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.RotlI32:return this.push("rotl<i32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.RotrI32:return this.push("rotr<i32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.EqI32:case n.BinaryOp.EqI64:case n.BinaryOp.EqF32:case n.BinaryOp.EqF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" == "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.NeI32:case n.BinaryOp.NeI64:case n.BinaryOp.NeF32:case n.BinaryOp.NeF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" != "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LtI32:case n.BinaryOp.LtI64:case n.BinaryOp.LtF32:case n.BinaryOp.LtF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" < "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LtU32:return this.push("<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" < <u32>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LeI32:case n.BinaryOp.LeI64:case n.BinaryOp.LeF32:case n.BinaryOp.LeF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" <= "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LeU32:return this.push("<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" <= <u32>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GtI32:case n.BinaryOp.GtI64:case n.BinaryOp.GtF32:case n.BinaryOp.GtF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" > "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GtU32:return this.push("<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" > <u32>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GeI32:case n.BinaryOp.GeI64:case n.BinaryOp.GeF32:case n.BinaryOp.GeF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >= "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GeU32:return this.push("<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >= <u32>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.DivU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" / <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.RemU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" % <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.RotlI64:return this.push("rotl<i64>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.RotrI64:return this.push("rotr<i64>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.LtU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" < <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LeU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" <= <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GtU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" > <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GeU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >= <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.CopysignF32:return this.push("copysign<f32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.MinF32:return this.push("min<f32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.MaxF32:return this.push("max<f32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.CopysignF64:return 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e.currentType==a.Type.f32?e.module.createF32(NaN):(e.currentType=a.Type.f64,e.module.createF64(NaN));case"Infinity":return e.currentType==a.Type.f32?e.module.createF32(1/0):(e.currentType=a.Type.f64,e.module.createF64(1/0));case"HEAP_BASE":return e.currentType=e.options.usizeType,e.module.createGetGlobal("HEAP_BASE",e.currentType.toNativeType())}return e.error(i.DiagnosticCode.Operation_not_supported,r.range),e.module.createUnreachable()},t.compileCall=function(e,t,r,p,l,h){var _,d,y,m,g,E,T,f,A=e.module;switch(t.internalName){case"isInteger":return e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable()):(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,T.is(4)&&!T.is(256)?A.createI32(1):A.createI32(0));case"isFloat":return e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable()):(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,T.is(8)?A.createI32(1):A.createI32(0));case"isReference":return e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable()):(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,T.is(256)?A.createI32(1):A.createI32(0));case"isString":if(e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable();if(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,N=T.classType){var I=e.program.elementsLookup.get("String");if(I){assert(I.kind==s.ElementKind.CLASS_PROTOTYPE);var v=I.resolve(null);if(!v)return A.createUnreachable();if(N.isAssignableTo(v))return A.createI32(1)}}return A.createI32(0);case"isArray":return e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable()):(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,null!=(N=T.classType)&&null!=N.prototype.fnIndexedGet?A.createI32(1):A.createI32(0));var N;case"isNaN":if(e.currentType=a.Type.bool,1!=p.length)return r&&1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable();if(r){if(1!=r.length)return e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 11:g=e.currentFunction.getAndFreeTempLocal(a.Type.f32),m=A.createBinary(o.BinaryOp.NeF32,A.createTeeLocal(g.index,_),A.createGetLocal(g.index,o.NativeType.F32));break;case 12:g=e.currentFunction.getAndFreeTempLocal(a.Type.f64),m=A.createBinary(o.BinaryOp.NeF64,A.createTeeLocal(g.index,_),A.createGetLocal(g.index,o.NativeType.F64));break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break;default:m=A.createI32(0)}return e.currentType=a.Type.bool,m;case"isFinite":if(e.currentType=a.Type.bool,1!=p.length)return r&&1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable();if(r){if(1!=r.length)return e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 11:g=e.currentFunction.getAndFreeTempLocal(a.Type.f32),m=A.createSelect(A.createBinary(o.BinaryOp.NeF32,A.createUnary(o.UnaryOp.AbsF32,A.createTeeLocal(g.index,_)),A.createF32(1/0)),A.createI32(0),A.createBinary(o.BinaryOp.EqF32,A.createGetLocal(g.index,o.NativeType.F32),A.createGetLocal(g.index,o.NativeType.F32)));break;case 12:g=e.currentFunction.getAndFreeTempLocal(a.Type.f64),m=A.createSelect(A.createBinary(o.BinaryOp.NeF64,A.createUnary(o.UnaryOp.AbsF64,A.createTeeLocal(g.index,_)),A.createF64(1/0)),A.createI32(0),A.createBinary(o.BinaryOp.EqF64,A.createGetLocal(g.index,o.NativeType.F64),A.createGetLocal(g.index,o.NativeType.F64)));break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break;default:m=A.createI32(1)}return e.currentType=a.Type.bool,m;case"clz":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(e.currentType.kind){default:m=A.createUnary(o.UnaryOp.ClzI32,_);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createUnary(e.options.isWasm64?o.UnaryOp.ClzI64:o.UnaryOp.ClzI32,_);break;case 3:case 8:m=A.createUnary(o.UnaryOp.ClzI64,_);break;case 11:case 12:case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"ctz":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(e.currentType.kind){default:m=A.createUnary(o.UnaryOp.CtzI32,_);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createUnary(e.options.isWasm64?o.UnaryOp.CtzI64:o.UnaryOp.CtzI32,_);break;case 3:case 8:m=A.createUnary(o.UnaryOp.CtzI64,_);break;case 11:case 12:case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"popcnt":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(e.currentType.kind){default:m=A.createUnary(o.UnaryOp.PopcntI32,_);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createUnary(e.options.isWasm64?o.UnaryOp.PopcntI64:o.UnaryOp.PopcntI32,_);break;case 3:case 8:m=A.createUnary(o.UnaryOp.PopcntI64,_);break;case 11:case 12:case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"rotl":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 0:case 1:case 5:case 6:case 10:m=n.makeSmallIntegerWrap(A.createBinary(o.BinaryOp.RotlI32,_,d),e.currentType,A);case 2:case 7:m=A.createBinary(o.BinaryOp.RotlI32,_,d);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createBinary(e.options.isWasm64?o.BinaryOp.RotlI64:o.BinaryOp.RotlI32,_,d);break;case 3:case 8:m=A.createBinary(o.BinaryOp.RotlI64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"rotr":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 0:case 1:case 5:case 6:case 10:m=n.makeSmallIntegerWrap(A.createBinary(o.BinaryOp.RotrI32,_,d),e.currentType,A);break;case 2:case 7:m=A.createBinary(o.BinaryOp.RotrI32,_,d);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createBinary(e.options.isWasm64?o.BinaryOp.RotrI64:o.BinaryOp.RotrI32,_,d);break;case 3:case 8:m=A.createBinary(o.BinaryOp.RotrI64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"abs":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 0:case 1:case 2:g=e.currentFunction.getAndFreeTempLocal(a.Type.i32),m=A.createSelect(A.createTeeLocal(g.index,_),A.createBinary(o.BinaryOp.SubI32,A.createI32(0),A.createGetLocal(g.index,o.NativeType.I32)),A.createBinary(o.BinaryOp.GtI32,A.createGetLocal(g.index,o.NativeType.I32),A.createI32(0)));break;case 4:g=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),m=A.createSelect(A.createTeeLocal(g.index,_),A.createBinary(e.options.isWasm64?o.BinaryOp.SubI64:o.BinaryOp.SubI32,e.options.usizeType.toNativeZero(A),A.createGetLocal(g.index,e.options.nativeSizeType)),A.createBinary(e.options.isWasm64?o.BinaryOp.GtI64:o.BinaryOp.GtI32,A.createGetLocal(g.index,e.options.nativeSizeType),e.options.usizeType.toNativeZero(A)));break;case 3:g=e.currentFunction.getAndFreeTempLocal(a.Type.i64),m=A.createSelect(A.createTeeLocal(g.index,_),A.createBinary(o.BinaryOp.SubI64,A.createI64(0,0),A.createGetLocal(g.index,o.NativeType.I64)),A.createBinary(o.BinaryOp.GtI64,A.createGetLocal(g.index,o.NativeType.I64),A.createI64(0,0)));break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 5:case 6:case 7:case 8:case 10:m=_;break;case 11:m=A.createUnary(o.UnaryOp.AbsF32,_);break;case 12:m=A.createUnary(o.UnaryOp.AbsF64,_);break;case 13:m=A.createUnreachable();break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"max":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 0:case 1:case 2:g=e.currentFunction.getTempLocal(a.Type.i32),E=e.currentFunction.getAndFreeTempLocal(a.Type.i32),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.GtI32,A.createGetLocal(g.index,o.NativeType.I32),A.createGetLocal(E.index,o.NativeType.I32)));break;case 5:case 6:case 7:case 10:g=e.currentFunction.getTempLocal(a.Type.i32),E=e.currentFunction.getAndFreeTempLocal(a.Type.i32),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.GtU32,A.createGetLocal(g.index,o.NativeType.I32),A.createGetLocal(E.index,o.NativeType.I32)));break;case 3:g=e.currentFunction.getTempLocal(a.Type.i64),E=e.currentFunction.getAndFreeTempLocal(a.Type.i64),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.GtI64,A.createGetLocal(g.index,o.NativeType.I64),A.createGetLocal(E.index,o.NativeType.I64)));break;case 8:g=e.currentFunction.getTempLocal(a.Type.i64),E=e.currentFunction.getAndFreeTempLocal(a.Type.i64),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.GtU64,A.createGetLocal(g.index,o.NativeType.I64),A.createGetLocal(E.index,o.NativeType.I64)));break;case 4:g=e.currentFunction.getTempLocal(e.options.usizeType),E=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(e.options.isWasm64?o.BinaryOp.GtI64:o.BinaryOp.GtI32,A.createGetLocal(g.index,e.options.nativeSizeType),A.createGetLocal(E.index,e.options.nativeSizeType)));break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}g=e.currentFunction.getTempLocal(e.options.usizeType),E=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(e.options.isWasm64?o.BinaryOp.GtU64:o.BinaryOp.GtU32,A.createGetLocal(g.index,e.options.nativeSizeType),A.createGetLocal(E.index,e.options.nativeSizeType)));break;case 11:m=A.createBinary(o.BinaryOp.MaxF32,_,d);break;case 12:m=A.createBinary(o.BinaryOp.MaxF64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"min":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 0:case 1:case 2:g=e.currentFunction.getTempLocal(a.Type.i32),E=e.currentFunction.getAndFreeTempLocal(a.Type.i32),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.LtI32,A.createGetLocal(g.index,o.NativeType.I32),A.createGetLocal(E.index,o.NativeType.I32)));break;case 5:case 6:case 7:case 10:g=e.currentFunction.getTempLocal(a.Type.i32),E=e.currentFunction.getAndFreeTempLocal(a.Type.i32),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.LtU32,A.createGetLocal(g.index,o.NativeType.I32),A.createGetLocal(E.index,o.NativeType.I32)));break;case 3:g=e.currentFunction.getTempLocal(a.Type.i64),E=e.currentFunction.getAndFreeTempLocal(a.Type.i64),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.LtI64,A.createGetLocal(g.index,o.NativeType.I64),A.createGetLocal(E.index,o.NativeType.I64)));break;case 8:g=e.currentFunction.getTempLocal(a.Type.i64),E=e.currentFunction.getAndFreeTempLocal(a.Type.i64),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.LtU64,A.createGetLocal(g.index,o.NativeType.I64),A.createGetLocal(E.index,o.NativeType.I64)));break;case 4:g=e.currentFunction.getTempLocal(e.options.usizeType),E=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(e.options.isWasm64?o.BinaryOp.LtI64:o.BinaryOp.LtI32,A.createGetLocal(g.index,e.options.nativeSizeType),A.createGetLocal(E.index,e.options.nativeSizeType)));break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}g=e.currentFunction.getTempLocal(e.options.usizeType),E=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(e.options.isWasm64?o.BinaryOp.LtU64:o.BinaryOp.LtU32,A.createGetLocal(g.index,e.options.nativeSizeType),A.createGetLocal(E.index,e.options.nativeSizeType)));break;case 11:m=A.createBinary(o.BinaryOp.MinF32,_,d);break;case 12:m=A.createBinary(o.BinaryOp.MinF64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"ceil":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}default:m=_;break;case 11:m=A.createUnary(o.UnaryOp.CeilF32,_);break;case 12:m=A.createUnary(o.UnaryOp.CeilF64,_);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"floor":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}default:m=_;break;case 11:m=A.createUnary(o.UnaryOp.FloorF32,_);break;case 12:m=A.createUnary(o.UnaryOp.FloorF64,_);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"copysign":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 11:m=A.createBinary(o.BinaryOp.CopysignF32,_,d);break;case 12:m=A.createBinary(o.BinaryOp.CopysignF64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"nearest":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}default:m=_;break;case 11:m=A.createUnary(o.UnaryOp.NearestF32,_);break;case 12:m=A.createUnary(o.UnaryOp.NearestF64,_);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"reinterpret":if(1!=p.length)return r&&1==r.length||(r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0")),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r?r.length.toString(10):"0"),A.createUnreachable();switch(r[0].kind){case 2:case 7:_=e.compileExpression(p[0],a.Type.f32),m=A.createUnary(o.UnaryOp.ReinterpretF32,_);break;case 3:case 8:_=e.compileExpression(p[0],a.Type.f64),m=A.createUnary(o.UnaryOp.ReinterpretF64,_);break;case 9:if(r[0].isReference)return e.error(i.DiagnosticCode.Operation_not_supported,h.range),e.currentType=r[0],A.createUnreachable();case 4:_=e.compileExpression(p[0],e.options.isWasm64?a.Type.f64:a.Type.f32),m=A.createUnary(e.options.isWasm64?o.UnaryOp.ReinterpretF64:o.UnaryOp.ReinterpretF32,_);break;case 11:_=e.compileExpression(p[0],a.Type.u32),m=A.createUnary(o.UnaryOp.ReinterpretI32,_);break;case 12:_=e.compileExpression(p[0],a.Type.u64),m=A.createUnary(o.UnaryOp.ReinterpretI64,_);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return e.currentType=r[0],m;case"sqrt":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 11:m=A.createUnary(o.UnaryOp.SqrtF32,_);break;case 12:m=A.createUnary(o.UnaryOp.SqrtF64,_);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"trunc":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}default:m=_;break;case 11:m=A.createUnary(o.UnaryOp.TruncF32,_);break;case 12:m=A.createUnary(o.UnaryOp.TruncF64,_);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"load":return p.length<1||p.length>2?(r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),p.length<1?e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,h.range,"1",p.length.toString(10)):e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.createUnreachable()):r&&1==r.length?(_=e.compileExpression(p[0],e.options.usizeType),(f=2==p.length?c(e,p[1]):0)<0?A.createUnreachable():(e.currentType=r[0],A.createLoad(r[0].byteSize,r[0].is(5),_,r[0].is(4)&&l.is(4)&&l.size>r[0].size?(e.currentType=l).toNativeType():(e.currentType=r[0]).toNativeType(),f))):(r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),A.createUnreachable());case"store":return e.currentType=a.Type.void,p.length<2||p.length>3?(r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),p.length<2?e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,h.range,"2",p.length.toString(10)):e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"3",p.length.toString(10)),A.createUnreachable()):r&&1==r.length?(_=e.compileExpression(p[0],e.options.usizeType),d=e.compileExpression(p[1],r[0],r[0].is(4)?0:1),e.currentType.is(4)&&r[0].is(4)&&r[0].size>e.currentType.size?(d=e.convertExpression(d,e.currentType,r[0],1,p[1]),T=r[0]):T=e.currentType,(f=3==p.length?c(e,p[2]):0)<0?A.createUnreachable():(e.currentType=a.Type.void,A.createStore(r[0].byteSize,_,d,T.toNativeType(),f))):(e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),A.createUnreachable());case"sizeof":return e.currentType=e.options.usizeType,0!=p.length?(r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"0",p.length.toString(10)),A.createUnreachable()):r?1!=r.length?(e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),A.createUnreachable()):m=e.options.isWasm64?A.createI64(r[0].byteSize,0):A.createI32(r[0].byteSize):(e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1","0"),A.createUnreachable());case"select":if(3!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"3",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(d=e.compileExpression(p[1],T=e.currentType),y=e.compileExpression(p[2],a.Type.bool),e.currentType=T,e.currentType.kind){default:m=A.createSelect(_,d,y);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"unreachable":return 0!=p.length&&e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"0",p.length.toString(10)),r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),A.createUnreachable();case"current_memory":return e.currentType=a.Type.i32,0!=p.length&&e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"0",p.length.toString(10)),r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),A.createHost(o.HostOp.CurrentMemory);case"grow_memory":return e.currentType=a.Type.i32,1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"0",p.length.toString(10)),_=A.createUnreachable()):_=e.compileExpression(p[0],a.Type.i32),r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),A.createHost(o.HostOp.GrowMemory,null,[_]);case"move_memory":if(r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),3!=p.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"3",p.length.toString(10)),e.currentType=a.Type.void,A.createUnreachable();throw _=e.compileExpression(p[0],e.options.usizeType),d=e.compileExpression(p[1],e.options.usizeType),y=e.compileExpression(p[2],e.options.usizeType),e.currentType=a.Type.void,new Error("not implemented");case"set_memory":if(r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),3!=p.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"3",p.length.toString(10)),e.currentType=a.Type.void,A.createUnreachable();throw _=e.compileExpression(p[0],e.options.usizeType),d=e.compileExpression(p[1],a.Type.u32),y=e.compileExpression(p[2],e.options.usizeType),e.currentType=a.Type.void,new Error("not implemented");case"changetype":return r&&1==r.length?9!=r[0].kind?(e.error(i.DiagnosticCode.Operation_not_supported,h.range),e.currentType=r[0],A.createUnreachable()):1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=r[0],A.createUnreachable()):(_=e.compileExpression(p[0],e.options.usizeType,0),e.currentType=r[0],9!=e.currentType.kind?(e.error(i.DiagnosticCode.Operation_not_supported,h.range),A.createUnreachable()):_):(r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),A.createUnreachable());case"assert":if(p.length<1||p.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,h.range,"1",r.length.toString(10))),p.length<1?e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,h.range,"1",p.length.toString(10)):p.length>2&&e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpressionRetainType(p[0],a.Type.i32);if(T=e.currentType,e.currentType=T.nonNullableType,e.options.noAssert)return l==a.Type.void?(e.currentType=a.Type.void,A.createNop()):_;var C=u(e,2==p.length?p[1]:null,h);if(e.currentType=T.nonNullableType,l==a.Type.void){switch(e.currentType.kind){default:m=A.createIf(A.createUnary(o.UnaryOp.EqzI32,_),C);break;case 3:case 8:m=A.createIf(A.createUnary(o.UnaryOp.EqzI64,_),C);break;case 4:case 9:m=A.createIf(A.createUnary(e.options.isWasm64?o.UnaryOp.EqzI64:o.UnaryOp.EqzI32,_),C);break;case 11:m=A.createIf(A.createBinary(o.BinaryOp.EqF32,_,A.createF32(0)),C);break;case 12:m=A.createIf(A.createBinary(o.BinaryOp.EqF64,_,A.createF64(0)),C);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=C}e.currentType=a.Type.void}else switch(e.currentType.kind){default:g=e.currentFunction.getAndFreeTempLocal(a.Type.i32),m=A.createIf(A.createUnary(o.UnaryOp.EqzI32,A.createTeeLocal(g.index,_)),C,A.createGetLocal(g.index,o.NativeType.I32));break;case 3:case 8:g=e.currentFunction.getAndFreeTempLocal(a.Type.i64),m=A.createIf(A.createUnary(o.UnaryOp.EqzI64,A.createTeeLocal(g.index,_)),C,A.createGetLocal(g.index,o.NativeType.I64));break;case 4:case 9:g=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),m=A.createIf(A.createUnary(e.options.isWasm64?o.UnaryOp.EqzI64:o.UnaryOp.EqzI32,A.createTeeLocal(g.index,_)),C,A.createGetLocal(g.index,e.options.nativeSizeType));break;case 11:g=e.currentFunction.getAndFreeTempLocal(a.Type.f32),m=A.createIf(A.createBinary(o.BinaryOp.EqF32,A.createTeeLocal(g.index,_),A.createF32(0)),C,A.createGetLocal(g.index,o.NativeType.F32));break;case 12:g=e.currentFunction.getAndFreeTempLocal(a.Type.f64),m=A.createIf(A.createBinary(o.BinaryOp.EqF64,A.createTeeLocal(g.index,_),A.createF64(0)),C,A.createGetLocal(g.index,o.NativeType.F64));break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=C}return m;case"i8":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.i8,A.createUnreachable()):e.compileExpression(p[0],a.Type.i8,2);case"i16":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.i16,A.createUnreachable()):e.compileExpression(p[0],a.Type.i16,2);case"i32":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.i32,A.createUnreachable()):e.compileExpression(p[0],a.Type.i32,2);case"i64":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.i64,A.createUnreachable()):e.compileExpression(p[0],a.Type.i64,2);case"isize":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=e.options.isWasm64?a.Type.isize64:a.Type.isize32,A.createUnreachable()):e.compileExpression(p[0],e.options.isWasm64?a.Type.isize64:a.Type.isize32,2);case"u8":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.u8,A.createUnreachable()):e.compileExpression(p[0],a.Type.u8,2);case"u16":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.u16,A.createUnreachable()):e.compileExpression(p[0],a.Type.u16,2);case"u32":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.u32,A.createUnreachable()):e.compileExpression(p[0],a.Type.u32,2);case"u64":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.u64,A.createUnreachable()):e.compileExpression(p[0],a.Type.u64,2);case"usize":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=e.options.usizeType,A.createUnreachable()):e.compileExpression(p[0],e.options.usizeType,2);case"bool":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.bool,A.createUnreachable()):e.compileExpression(p[0],a.Type.bool,2);case"f32":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.f32,A.createUnreachable()):e.compileExpression(p[0],a.Type.f32,2);case"f64":return 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O(this,r,n,e,t),e.name.kind==p.NodeKind.CONSTRUCTOR?t.constructorPrototype?this.error(s.DiagnosticCode.Multiple_constructor_implementations_are_not_allowed,e.name.range):(i.set(E.CONSTRUCTOR),t.constructorPrototype=i):t.instanceMembers.set(r,i),t.is(E.MODULE_EXPORT)&&i.set(E.MODULE_EXPORT)}this.checkOperators(e.decorators,i,t)},r.prototype.checkOperators=function(e,t,r){if(e)for(var n=0,i=e.length;n<i;++n){var a=e[n];if(a.decoratorKind==p.DecoratorKind.OPERATOR){if(!t){this.error(s.DiagnosticCode.Operation_not_supported,a.range);continue}var o=a.arguments&&a.arguments.length||0;if(1==o){var c=a.arguments[0];if(c.kind==p.NodeKind.LITERAL&&c.literalKind==p.LiteralKind.STRING)switch(c.value){case"[]":r.fnIndexedGet=t.simpleName;break;case"[]=":r.fnIndexedSet=t.simpleName;break;case"+":r.fnConcat=t.simpleName;break;case"==":r.fnEquals=t.simpleName;break;default:this.error(s.DiagnosticCode.Operation_not_supported,c.range)}else this.error(s.DiagnosticCode.String_literal_expected,c.range)}else this.error(s.DiagnosticCode.Expected_0_arguments_but_got_1,a.range,"1",o.toString(0))}else a.decoratorKind!=p.DecoratorKind.CUSTOM&&this.error(s.DiagnosticCode.Operation_not_supported,a.range)}},r.prototype.initializeAccessor=function(e,r){var n=e.name.text,i=e.fileLevelInternalName,a=this.elementsLookup.get(i),o=e.is(E.GET),c=!1;if(a){if(a.kind!=g.PROPERTY||null!=(o?a.getterPrototype:a.setterPrototype))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,i)}else a=new B(this,n,i,r),c=!0;var p=(o?t.GETTER_PREFIX:t.SETTER_PREFIX)+n;if(e.is(E.STATIC)){var u=r.internalName+t.STATIC_DELIMITER+p;if(this.elementsLookup.has(u))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,u);var l=new O(this,p,u,e,null);if(o?a.getterPrototype=l:a.setterPrototype=l,c){if(r.members){if(r.members.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,u)}else r.members=new Map;r.members.set(n,a)}else assert(r.members&&r.members.has(n));this.elementsLookup.set(i,a),r.is(E.MODULE_EXPORT)&&a.set(E.MODULE_EXPORT)}else{var h=r.internalName+t.INSTANCE_DELIMITER+p;if(r.instanceMembers){if(r.instanceMembers.has(p))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,i)}else r.instanceMembers=new Map;var _=new O(this,p,h,e,r);o?a.getterPrototype=_:a.setterPrototype=_,r.instanceMembers.set(p,a),this.elementsLookup.set(i,a),r.is(E.MODULE_EXPORT)&&a.set(E.MODULE_EXPORT)}},r.prototype.initializeEnum=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.name.text,i=new I(this,n,r,e);if(i.namespace=t,this.elementsLookup.set(r,i),t){if(t.members){if(t.members.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n,i),t.is(E.MODULE_EXPORT)&&i.set(E.MODULE_EXPORT)}else if(i.is(E.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,i),e.range.source.isEntry){if(this.moduleLevelExports.has(r))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);i.set(E.MODULE_EXPORT),this.moduleLevelExports.set(r,i)}}for(var a=e.values,o=0,c=a.length;o<c;++o)this.initializeEnumValue(a[o],i);this.checkInternalDecorators(i,e)}},r.prototype.initializeEnumValue=function(e,t){var r=e.name.text,n=e.fileLevelInternalName,i=t.is(E.MODULE_EXPORT);if(t.members){if(t.members.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else t.members=new Map;var a=new v(t,this,r,n,e);t.members.set(r,a),i&&a.set(E.MODULE_EXPORT)},r.prototype.initializeExports=function(e,t){for(var r=e.members,n=0,i=r.length;n<i;++n)this.initializeExport(r[n],e.internalPath,t)},r.prototype.setExportAndCheckLibrary=function(e,t,r){this.fileLevelExports.set(e,t),r.range.source.isLibrary&&(this.elementsLookup.has(r.text)?this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,r.range,r.text):(t.internalName=r.text,this.elementsLookup.set(r.text,t)))},r.prototype.initializeExport=function(e,r,n){var i,a,o,c=e.range.source.internalPath+t.PATH_DELIMITER+e.externalName.text;if(this.fileLevelExports.has(c))this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,c);else if(null==r){if(i=e.range.source.internalPath+t.PATH_DELIMITER+e.name.text,a=this.elementsLookup.get(i))return void this.setExportAndCheckLibrary(c,a,e.externalName);if(n.has(c))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,c);(o=new l).isReExport=!1,o.referencedName=i,o.member=e,n.set(c,o)}else{if(i=r+t.PATH_DELIMITER+e.name.text,a=this.elementsLookup.get(i))return void this.setExportAndCheckLibrary(c,a,e.externalName);for(var p=new Set;o=n.get(i);){if(!o.isReExport){if(a=this.elementsLookup.get(o.referencedName))return void this.setExportAndCheckLibrary(c,a,e.externalName);break}if(a=this.fileLevelExports.get(o.referencedName))return void this.setExportAndCheckLibrary(c,a,e.externalName);if(i=o.referencedName,p.has(o))break;p.add(o)}if(n.has(c))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.externalName.range,c);(o=new l).isReExport=!0,o.referencedName=i,o.member=e,n.set(c,o)}},r.prototype.initializeFunction=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=e.name.text,i=new O(this,n,r,e,null);if(i.namespace=t,this.elementsLookup.set(r,i),t){if(t.members){if(t.members.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n,i),t.is(E.MODULE_EXPORT)&&i.is(E.EXPORT)&&i.set(E.MODULE_EXPORT)}else if(i.is(E.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,i),e.range.source.isEntry){if(this.moduleLevelExports.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);i.set(E.MODULE_EXPORT),this.moduleLevelExports.set(r,i)}}this.checkInternalDecorators(i,e)}},r.prototype.initializeImports=function(e,r,n){var i=e.declarations;if(i)for(var a=0,o=i.length;a<o;++a)this.initializeImport(i[a],e.internalPath,r,n);else if(e.namespaceName){var c=e.range.source.internalPath+t.PATH_DELIMITER+e.namespaceName.text;if(this.elementsLookup.has(c))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.namespaceName.range,c);this.error(s.DiagnosticCode.Operation_not_supported,e.range)}},r.prototype.initializeImport=function(e,r,n,i){var a=e.fileLevelInternalName;if(this.elementsLookup.has(a))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,a);else{var o,c=r+t.PATH_DELIMITER+e.externalName.text;if(o=this.fileLevelExports.get(c))this.elementsLookup.set(a,o);else{var p=t.PATH_DELIMITER+"index",u=new h;u.internalName=a,r.endsWith(p)?(u.referencedName=c,u.referencedNameAlt=r.substring(0,r.length-p.length+1)+e.externalName.text):(u.referencedName=c,u.referencedNameAlt=r+p+t.PATH_DELIMITER+e.externalName.text),u.declaration=e,i.push(u)}}},r.prototype.initializeInterface=function(e,t){void 0===t&&(t=null);var r=e.fileLevelInternalName;if(this.elementsLookup.has(r))this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=new D(this,e.name.text,r,e);if(n.namespace=t,this.elementsLookup.set(r,n),t){if(t.members){if(t.members.has(n.internalName))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r)}else t.members=new Map;t.members.set(n.internalName,n),t.is(E.MODULE_EXPORT)&&n.is(E.EXPORT)&&n.set(E.MODULE_EXPORT)}else if(n.is(E.EXPORT)){if(this.fileLevelExports.has(r))return void this.error(s.DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,e.name.range,r);if(this.fileLevelExports.set(r,n),e.range.source.isEntry){if(this.moduleLevelExports.has(r))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);n.set(E.MODULE_EXPORT),this.moduleLevelExports.set(r,n)}}for(var i=e.members,a=0,o=i.length;a<o;++a){var c=i[a];switch(c.kind){case p.NodeKind.FIELDDECLARATION:this.initializeField(c,n);break;case p.NodeKind.METHODDECLARATION:c.isAny(E.GET|E.SET)?this.initializeAccessor(c,n):this.initializeMethod(c,n);break;default:throw new Error("interface member expected")}}this.checkInternalDecorators(n,e)}},r.prototype.initializeNamespace=function(e,t,r){void 0===r&&(r=null);var n=e.fileLevelInternalName,i=e.name.text,a=this.elementsLookup.get(n);if(a||((a=new A(this,i,n,e)).namespace=r,this.elementsLookup.set(n,a),this.checkInternalDecorators(a,e)),r){if(r.members){if(r.members.has(i))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n)}else r.members=new Map;r.members.set(i,a),r.is(E.MODULE_EXPORT)&&a.is(E.EXPORT)&&a.set(E.MODULE_EXPORT)}else if(a.is(E.EXPORT)){var o=this.fileLevelExports.get(n);if(o?(o.is(E.EXPORT)||this.error(s.DiagnosticCode.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local,e.name.range,a.internalName),a=o):this.fileLevelExports.set(n,a),e.range.source.isEntry){if(this.moduleLevelExports.has(n))return void this.error(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,n);a.set(E.MODULE_EXPORT),this.moduleLevelExports.set(n,a)}}for(var c=e.members,u=0,l=c.length;u<l;++u)switch(c[u].kind){case p.NodeKind.CLASSDECLARATION:this.initializeClass(c[u],t,a);break;case p.NodeKind.ENUMDECLARATION:this.initializeEnum(c[u],a);break;case p.NodeKind.FUNCTIONDECLARATION:this.initializeFunction(c[u],a);break;case p.NodeKind.INTERFACEDECLARATION:this.initializeInterface(c[u],a);break;case p.NodeKind.NAMESPACEDECLARATION:this.initializeNamespace(c[u],t,a);break;case p.NodeKind.TYPEDECLARATION:this.error(s.DiagnosticCode.Operation_not_supported,c[u].range);break;case p.NodeKind.VARIABLE:this.initializeVariables(c[u],a);break;default:throw new Error("namespace member expected")}},r.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(s.DiagnosticCode.Duplicate_identifier_0,e.name.range,r);else{var n=new _;n.typeParameters=e.typeParameters,n.type=e.type,this.typeAliases.set(r,n)}},r.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],o=a.fileLevelInternalName;if(this.elementsLookup.has(o))this.error(s.DiagnosticCode.Duplicate_identifier_0,a.name.range,o);else{var p=a.name.text,u=new C(this,p,o,a,c.Type.void);if(u.namespace=t,this.elementsLookup.set(o,u),t){if(t.members){if(t.members.has(p)){this.error(s.DiagnosticCode.Duplicate_identifier_0,a.name.range,o);continue}}else t.members=new Map;t.members.set(p,u),t.is(E.MODULE_EXPORT)&&u.is(E.EXPORT)&&u.set(E.MODULE_EXPORT)}else if(u.is(E.EXPORT)&&(this.fileLevelExports.has(o)?this.error(s.DiagnosticCode.Duplicate_identifier_0,a.name.range,o):this.fileLevelExports.set(o,u),a.range.source.isEntry)){if(this.moduleLevelExports.has(o)){this.error(s.DiagnosticCode.Duplicate_identifier_0,a.name.range,o);continue}u.set(E.MODULE_EXPORT),this.moduleLevelExports.set(o,u)}this.checkInternalDecorators(u,a)}}},r.prototype.resolveSignature=function(e,t,r){void 0===t&&(t=null),void 0===r&&(r=!0);var n=e.explicitThisType,i=null;if(n&&!(i=this.resolveType(n,t,r)))return null;for(var a=e.parameterTypes,o=a.length,s=new Array(o),u=new Array(o),l=0,h=!1,_=0;_<o;++_){var d=a[_];switch(d.parameterKind){case p.ParameterKind.DEFAULT:l=_+1;break;case p.ParameterKind.REST:assert(_==o),h=!0}var y=this.resolveType(assert(d.type),t,r);if(!y)return null;s[_]=y,u[_]=d.name.text}var m,g=e.returnType;if(g){if(!(m=this.resolveType(g,t,r)))return null}else m=c.Type.void;var E=new c.Signature(s,m,i);return E.parameterNames=u,E.requiredParameters=l,E.hasRest=h,E},r.prototype.resolveType=function(e,r,n){if(void 0===r&&(r=null),void 0===n&&(n=!0),e.kind==p.NodeKind.SIGNATURE){var i=this.resolveSignature(e,r,n);return i?c.Type.u32.asFunction(i):null}var a,o=e,u=o.name.text,l=u,h=o.range.source.internalPath+t.PATH_DELIMITER+u;if((a=this.elementsLookup.get(h))||(a=this.elementsLookup.get(l)))switch(a.kind){case g.CLASS_PROTOTYPE:var _=a.resolveUsingTypeArguments(o.typeArguments,r,null);return _?_.type:null}var d,y=this.typeAliases.get(u);if(y)return this.resolveType(y.type,r,n);if(o.typeArguments){for(var m=o.typeArguments.length,E=new Array(m),T=0;T<m;++T){var f=this.resolveType(o.typeArguments[T],r,n);if(!f)return null;E[T]=f}if(m){var A=c.typesToString(E);A.length&&(h+="<"+A+">",l+="<"+A+">")}else if(r){var I=r.get(l);if(I)return I}}return(d=this.typesLookup.get(h))||(d=this.typesLookup.get(l))?d:(n&&this.error(s.DiagnosticCode.Cannot_find_name_0,o.name.range,l),null)},r.prototype.resolveTypeArguments=function(e,t,r,n){void 0===r&&(r=null),void 0===n&&(n=null);var i=e.length,a=t?t.length:0;if(i!=a)return a?this.error(s.DiagnosticCode.Expected_0_type_arguments_but_got_1,p.Range.join(t[0].range,t[a-1].range),i.toString(10),a.toString(10)):n&&this.error(s.DiagnosticCode.Expected_0_type_arguments_but_got_1,n.range.atEnd,i.toString(10),"0"),null;for(var o=new Array(i),c=0;c<i;++c){var u=this.resolveType(t[c],r,!0);if(!u)return null;o[c]=u}return o},r.prototype.resolveIdentifier=function(e,r,n){void 0===n&&(n=null);var i,a,o=e.text;if(n){if(n.members&&(i=n.members.get(o))&&i.kind==g.ENUMVALUE)return m||(m=new T),m.set(i)}else if(r){if(i=r.flow.getScopedLocal(o))return m||(m=new T),m.set(i);if(a=r.prototype.namespace)do{if(i=this.elementsLookup.get(a.internalName+t.STATIC_DELIMITER+o))return m||(m=new T),m.set(i)}while(a=a.namespace)}return(i=this.elementsLookup.get(e.range.source.internalPath+t.PATH_DELIMITER+o))?(m||(m=new T),m.set(i)):(i=this.elementsLookup.get(o))?(m||(m=new T),m.set(i)):(this.error(s.DiagnosticCode.Cannot_find_name_0,e.range,o),null)},r.prototype.resolvePropertyAccess=function(e,t){var r=e.expression;if(!(m=this.resolveExpression(r,t)))return null;var n,i,a=m.element,o=e.property.text;switch(a.kind){case g.GLOBAL:case g.LOCAL:case g.FIELD:if(!(n=a.type).classType)return this.error(s.DiagnosticCode.Property_0_does_not_exist_on_type_1,e.property.range,o,n.toString()),null;a=n.classType;break;case g.PROPERTY:var c=assert(a.getterPrototype).resolve();if(!c)return null;if(!(n=c.signature.returnType).classType)return this.error(s.DiagnosticCode.Property_0_does_not_exist_on_type_1,e.property.range,o,n.toString()),null;a=n.classType}switch(a.kind){case g.CLASS_PROTOTYPE:case g.CLASS:for(;;){if(a.members&&(i=a.members.get(o)))return m.set(i).withTarget(a,r);if(a.kind==g.CLASS_PROTOTYPE){if(!a.basePrototype)break;a=a.basePrototype}else{if(a.kind!=g.CLASS)break;if(!a.base)break;a=a.base}}break;default:if(a.members&&(i=a.members.get(o)))return m.set(i).withTarget(a,r)}return this.error(s.DiagnosticCode.Property_0_does_not_exist_on_type_1,e.property.range,o,a.internalName),null},r.prototype.resolveElementAccess=function(e,t){var r=e.expression;if(!(m=this.resolveExpression(r,t)))return null;var n=m.element;switch(n.kind){case g.GLOBAL:case g.LOCAL:case g.FIELD:var i=n.type;if(i.classType){var a=(n=i.classType).prototype.fnIndexedGet,o=void 0;if(null!=a&&n.members&&(o=n.members.get(a))&&o.kind==g.FUNCTION_PROTOTYPE)return m.set(o).withTarget(i.classType,r)}}return this.error(s.DiagnosticCode.Index_signature_is_missing_in_type_0,r.range,n.internalName),null},r.prototype.resolveExpression=function(e,t){for(;e.kind==p.NodeKind.PARENTHESIZED;)e=e.expression;switch(e.kind){case p.NodeKind.ASSERTION:var r=this.resolveType(e.toType);if(r)if(c=r.classType)return m||(m=new T),m.set(c);return null;case p.NodeKind.BINARY:throw new Error("not implemented");case p.NodeKind.THIS:return(n=t.memberOf)?(m||(m=new T),m.set(n)):(this.error(s.DiagnosticCode._this_cannot_be_referenced_in_current_location,e.range),null);case p.NodeKind.SUPER:var n;return(n=t.memberOf)&&n.kind==g.CLASS&&(n=n.base)?(m||(m=new T),m.set(n)):(this.error(s.DiagnosticCode._super_can_only_be_referenced_in_a_derived_class,e.range),null);case p.NodeKind.IDENTIFIER:return this.resolveIdentifier(e,t);case p.NodeKind.PROPERTYACCESS:return this.resolvePropertyAccess(e,t);case p.NodeKind.ELEMENTACCESS:return this.resolveElementAccess(e,t);case p.NodeKind.CALL:var i=this.resolveExpression(e.expression,t);if(i){var a=i.element;if(a&&a.kind==g.FUNCTION_PROTOTYPE){var o=a.resolveUsingTypeArguments(e.typeArguments,t.contextualTypeArguments,e);if(o){var c,u=o.signature.returnType;if(c=u.classType)return m||(m=new T),m.set(c);var l=u.functionType;if(l){var h=l.cachedFunctionTarget;return h||(h=new k(this,l),l.cachedFunctionTarget=h),m||(m=new T),m.set(h)}}}}}return this.error(s.DiagnosticCode.Operation_not_supported,e.range),null},r}(s.DiagnosticEmitter);t.Program=y;var m,g,E,T=function(){function e(){}return e.prototype.set=function(e){return this.target=null,this.targetExpression=null,this.element=e,this},e.prototype.withTarget=function(e,t){return this.target=e,this.targetExpression=t,this},Object.defineProperty(e.prototype,"isInstanceTarget",{get:function(){return 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f=function(){function e(e,t,r){this.flags=E.NONE,this.members=null,this.namespace=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}();t.Element=f;var A=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=g.NAMESPACE,a.declaration=i,a.flags=i.flags,a}return i(t,e),t}(f);t.Namespace=A;var I=function(e){function t(t,r,n,i){var a=e.call(this,t,r,n)||this;return a.kind=g.ENUM,a.declaration=i,a.flags=i.flags,a}return i(t,e),t}(f);t.Enum=I;var v=function(e){function t(t,r,n,i,a){var o=e.call(this,r,n,i)||this;return o.kind=g.ENUMVALUE,o.constantValue=0,o.enum=t,o.declaration=a,o}return i(t,e),t}(f);t.EnumValue=v,function(e){e[e.NONE=0]="NONE",e[e.INTEGER=1]="INTEGER",e[e.FLOAT=2]="FLOAT"}(t.ConstantValueKind||(t.ConstantValueKind={}));var N=function(e){function t(){var 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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 i(t,e),t.prototype.next=function(e){return void 0===e&&(e=!1),this.nextToken=-1,this.token=this.unsafeNext(e)},t.prototype.unsafeNext=function(e,t){void 0===e&&(e=!1),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:++this.pos<this.end&&10==r.charCodeAt(this.pos)&&++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,a.EXCLAMATION_EQUALS_EQUALS):a.EXCLAMATION_EQUALS):a.EXCLAMATION;case 34:case 39:case 96:return a.STRINGLITERAL;case 37:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,a.PERCENT_EQUALS):a.PERCENT;case 38:if(++this.pos,t>1&&this.pos<this.end){if(38==r.charCodeAt(this.pos))return++this.pos,a.AMPERSAND_AMPERSAND;if(61==r.charCodeAt(this.pos))return++this.pos,a.AMPERSAND_EQUALS}return a.AMPERSAND;case 40:return++this.pos,a.OPENPAREN;case 41:return++this.pos,a.CLOSEPAREN;case 42:if(++this.pos,t>1&&this.pos<this.end){if(61==r.charCodeAt(this.pos))return++this.pos,a.ASTERISK_EQUALS;if(42==r.charCodeAt(this.pos))return++this.pos,t>2&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,a.ASTERISK_ASTERISK_EQUALS):a.ASTERISK_ASTERISK}return a.ASTERISK;case 43:if(++this.pos,t>1&&this.pos<this.end){if(43==r.charCodeAt(this.pos))return++this.pos,a.PLUS_PLUS;if(61==r.charCodeAt(this.pos))return++this.pos,a.PLUS_EQUALS}return a.PLUS;case 44:return++this.pos,a.COMMA;case 45:if(++this.pos,t>1&&this.pos<this.end){if(45==r.charCodeAt(this.pos))return++this.pos,a.MINUS_MINUS;if(61==r.charCodeAt(this.pos))return++this.pos,a.MINUS_EQUALS}return a.MINUS;case 46:if(++this.pos,t>1&&this.pos<this.end){if(c.isDecimalDigit(r.charCodeAt(this.pos)))return--this.pos,a.FLOATLITERAL;if(t>2&&this.pos+1<this.end&&46==r.charCodeAt(this.pos)&&46==r.charCodeAt(this.pos+1))return this.pos+=2,a.DOT_DOT_DOT}return a.DOT;case 47:var i=this.pos;if(++this.pos,t>1&&this.pos<this.end){if(47==r.charCodeAt(this.pos)){var l=s.CommentKind.LINE;for(this.pos+1<this.end&&47==r.charCodeAt(this.pos+1)&&(++this.pos,l=s.CommentKind.TRIPLE);++this.pos<this.end;)if(10==r.charCodeAt(this.pos)){++this.pos;break}this.onComment&&this.onComment(l,r.substring(i,this.pos),this.range(i,this.pos));break}if(42==r.charCodeAt(this.pos)){for(var h=!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,h=!0;break}h?this.onComment&&this.onComment(s.CommentKind.BLOCK,r.substring(i,this.pos),this.range(i,this.pos)):this.error(o.DiagnosticCode._0_expected,this.range(this.pos),"*/");break}if(61==r.charCodeAt(this.pos))return++this.pos,a.SLASH_EQUALS}return a.SLASH;case 48:case 49:case 50:case 51:case 52:case 53:case 54:case 55:case 56:case 57:return this.testInteger()?a.INTEGERLITERAL:a.FLOATLITERAL;case 58:return++this.pos,a.COLON;case 59:return++this.pos,a.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,a.LESSTHAN_LESSTHAN_EQUALS):a.LESSTHAN_LESSTHAN;if(61==r.charCodeAt(this.pos))return++this.pos,a.LESSTHAN_EQUALS}return a.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,a.EQUALS_EQUALS_EQUALS):a.EQUALS_EQUALS;if(62==r.charCodeAt(this.pos))return++this.pos,a.EQUALS_GREATERTHAN}return a.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,a.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS):a.GREATERTHAN_GREATERTHAN_GREATERTHAN;if(61==r.charCodeAt(this.pos))return++this.pos,a.GREATERTHAN_GREATERTHAN_EQUALS}return a.GREATERTHAN_GREATERTHAN}if(61==r.charCodeAt(this.pos))return++this.pos,a.GREATERTHAN_EQUALS}return a.GREATERTHAN;case 63:return++this.pos,a.QUESTION;case 91:return++this.pos,a.OPENBRACKET;case 93:return++this.pos,a.CLOSEBRACKET;case 94:return++this.pos,t>1&&this.pos<this.end&&61==r.charCodeAt(this.pos)?(++this.pos,a.CARET_EQUALS):a.CARET;case 123:return++this.pos,a.OPENBRACE;case 124:if(++this.pos,t>1&&this.pos<this.end){if(124==r.charCodeAt(this.pos))return++this.pos,a.BAR_BAR;if(61==r.charCodeAt(this.pos))return++this.pos,a.BAR_EQUALS}return a.BAR;case 125:return++this.pos,a.CLOSEBRACE;case 126:return++this.pos,a.TILDE;case 64:return++this.pos,a.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=_,a.IDENTIFIER;var d=p(r.substring(_,this.pos));if(!(d==a.INVALID||e&&u(d)))return d;this.pos=_}return a.IDENTIFIER}if(c.isWhiteSpace(n)){++this.pos;break}return this.error(o.DiagnosticCode.Invalid_character,this.range(this.pos,this.pos+1)),++this.pos,a.INVALID}}return a.ENDOFFILE},t.prototype.peek=function(e,t,r){void 0===e&&(e=!1),void 0===t&&(t=!1),void 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0===t&&(t=-1),e<0?(e=this.tokenPos,t=this.pos):t<0&&(t=e),new l(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(o.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(o.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(o.DiagnosticCode.Unexpected_end_of_text,this.range(this.end)),"";var 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y=i64_shr_u(i64_align(d,65536),i64_new(16,0));t.setMemory(i64_low(y),this.options.isWasm64?p.Module.MAX_MEMORY_WASM64:p.Module.MAX_MEMORY_WASM32,this.memorySegments,e.target,"memory")}e.importMemory&&t.addMemoryImport("0","env","memory");var m=this.functionTable,g=m.length;if(g){var E=new Array(g);for(o=0;o<g;++o)E[o]=m[o].ref;t.setFunctionTable(E)}return t},t.prototype.compileSourceByPath=function(e,t){for(var r=this.program.sources,n=e+".ts",i=0,a=r.length;i<a;++i){if((o=r[i]).normalizedPath==n)return void this.compileSource(o)}n=e+"/index.ts";for(i=0,a=r.length;i<a;++i){if((o=r[i]).normalizedPath==n)return void this.compileSource(o)}n=u.LIBRARY_PREFIX+e+".ts";for(i=0,a=r.length;i<a;++i){var o;if((o=r[i]).normalizedPath==n)return void this.compileSource(o)}this.error(c.DiagnosticCode.File_0_not_found,t.range,e)},t.prototype.compileSource=function(e){var t=this.files,r=e.normalizedPath;if(!t.has(r)){t.add(r);for(var n=this.options.noTreeShaking,i=e.isEntry,a=this.startFunction,o=this.startFunctionBody,s=e.statements,c=0,p=s.length;c<p;++c){var l=s[c];switch(l.kind){case h.NodeKind.CLASSDECLARATION:(n||i&&l.is(u.CommonFlags.EXPORT))&&!l.isGeneric&&this.compileClassDeclaration(l,[]);break;case h.NodeKind.ENUMDECLARATION:(n||i&&l.is(u.CommonFlags.EXPORT))&&this.compileEnumDeclaration(l);break;case h.NodeKind.FUNCTIONDECLARATION:(n||i&&l.is(u.CommonFlags.EXPORT))&&!l.isGeneric&&this.compileFunctionDeclaration(l,[]);break;case h.NodeKind.IMPORT:this.compileSourceByPath(l.normalizedPath,l.path);break;case h.NodeKind.NAMESPACEDECLARATION:(n||i&&l.is(u.CommonFlags.EXPORT))&&this.compileNamespaceDeclaration(l);break;case h.NodeKind.VARIABLE:var _=this.compileVariableStatement(l);_&&o.push(_);break;case h.NodeKind.EXPORT:null!=l.normalizedPath&&this.compileSourceByPath(l.normalizedPath,l.path),(n||i)&&this.compileExportStatement(l);break;default:var d=this.currentFunction;this.currentFunction=a,o.push(this.compileStatement(l)),this.currentFunction=d}}}},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(u.CommonFlags.COMPILED)||e.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN))return!0;e.set(u.CommonFlags.COMPILED);var t=this.module,r=e.declaration,n=0;if(e.type==_.Type.void)if(r.type){var i=this.program.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.compileExpression(r.initializer,_.Type.void,0),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}var a=e.type.toNativeType(),o=e.isAny(u.CommonFlags.CONST)||e.is(u.CommonFlags.STATIC|u.CommonFlags.READONLY);if(e.is(u.CommonFlags.AMBIENT))return o?(e.set(u.CommonFlags.MODULE_IMPORT),t.addGlobalImport(e.internalName,e.namespace?e.namespace.simpleName:"env",e.simpleName,a),e.set(u.CommonFlags.COMPILED),!0):(this.error(c.DiagnosticCode.Operation_not_supported,r.range),!1);var s=!1;e.is(u.CommonFlags.INLINED)?n=this.compileInlineConstant(e,e.type,!0):r.initializer?(n||(n=this.compileExpression(r.initializer,e.type)),_BinaryenExpressionGetId(n)!=p.ExpressionId.Const&&(o?(n=this.precomputeExpressionRef(n),_BinaryenExpressionGetId(n)!=p.ExpressionId.Const&&(this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,r.range),s=!0)):s=!0)):n=e.type.toNativeZero(t);var l=e.internalName;if(s)t.addGlobal(l,a,!0,e.type.toNativeZero(t)),this.startFunctionBody.push(t.createSetGlobal(l,n));else if(o){switch(_BinaryenExpressionGetType(n)){case p.NativeType.I32:e.constantValueKind=1,e.constantIntegerValue=i64_new(_BinaryenConstGetValueI32(n),0);break;case p.NativeType.I64:e.constantValueKind=1,e.constantIntegerValue=i64_new(_BinaryenConstGetValueI64Low(n),_BinaryenConstGetValueI64High(n));break;case p.NativeType.F32:e.constantValueKind=2,e.constantFloatValue=_BinaryenConstGetValueF32(n);break;case p.NativeType.F64:e.constantValueKind=2,e.constantFloatValue=_BinaryenConstGetValueF64(n);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.declaration.range),e.constantValueKind=1,e.constantIntegerValue=i64_new(0)}e.set(u.CommonFlags.INLINED),r.isTopLevel&&t.addGlobal(l,a,!1,n),r.range.source.isEntry&&r.isTopLevelExport&&t.addGlobalExport(e.internalName,r.programLevelInternalName)}else t.addGlobal(l,a,!o,n);return!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){if(e.is(u.CommonFlags.COMPILED))return!0;e.set(u.CommonFlags.COMPILED);var t=this.module;this.currentEnum=e;var r,n,i=null;if(e.members)try{for(var o=a(e.members.values()),s=o.next();!s.done;s=o.next()){var l=s.value;if(l.kind==u.ElementKind.ENUMVALUE){var h=!1,d=l,y=d.declaration;if(d.set(u.CommonFlags.COMPILED),d.is(u.CommonFlags.INLINED))e.declaration.isTopLevelExport&&t.addGlobal(d.internalName,p.NativeType.I32,!1,t.createI32(d.constantValue));else{var m=void 0;y.value?(m=this.compileExpression(y.value,_.Type.i32),_BinaryenExpressionGetId(m)!=p.ExpressionId.Const&&(m=this.precomputeExpressionRef(m),_BinaryenExpressionGetId(m)!=p.ExpressionId.Const&&(e.is(u.CommonFlags.CONST)&&this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,y.range),h=!0))):null==i?m=t.createI32(0):i.is(u.CommonFlags.INLINED)?m=t.createI32(i.constantValue+1):(m=t.createBinary(p.BinaryOp.AddI32,t.createGetGlobal(i.internalName,p.NativeType.I32),t.createI32(1)),e.is(u.CommonFlags.CONST)&&this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,y.range),h=!0),h?(t.addGlobal(d.internalName,p.NativeType.I32,!0,t.createI32(0)),this.startFunctionBody.push(t.createSetGlobal(d.internalName,m))):(t.addGlobal(d.internalName,p.NativeType.I32,!1,m),_BinaryenExpressionGetType(m)==p.NativeType.I32?(d.constantValue=_BinaryenConstGetValueI32(m),d.set(u.CommonFlags.INLINED)):(assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,y.range),d.constantValue=0))}i=d,e.declaration.range.source.isEntry&&e.declaration.isTopLevelExport&&(l.is(u.CommonFlags.INLINED)?t.addGlobalExport(l.internalName,l.internalName):y&&this.warning(c.DiagnosticCode.Cannot_export_a_mutable_global,y.range))}}}catch(e){r={error:e}}finally{try{s&&!s.done&&(n=o.return)&&n.call(o)}finally{if(r)throw r.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,n.declaration.name)},t.prototype.compileFunctionUsingTypeArguments=function(e,t,r,n){var i=e.resolveUsingTypeArguments(t,r,n);return i&&this.compileFunction(i)?i:null},t.prototype.ensureFunctionType=function(e){var t,r=e.parameterTypes.length,n=e.thisType,i=0;n?((t=new Array(1+r))[0]=n.toNativeType(),i=1):t=new Array(r);for(var a=0;a<r;++a,++i)t[i]=e.parameterTypes[a].toNativeType();var o=e.returnType.toNativeType(),s=this.module,c=s.getFunctionTypeBySignature(o,t);return c||(c=s.addFunctionType(e.toSignatureString(),o,t)),c},t.prototype.compileFunction=function(e){if(e.is(u.CommonFlags.COMPILED))return!0;assert(!e.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN)||"abort"==e.simpleName),e.set(u.CommonFlags.COMPILED);var t,r=e.prototype.declaration,n=r.body;n?e.is(u.CommonFlags.AMBIENT)&&this.error(c.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,r.name.range):e.is(u.CommonFlags.AMBIENT)||this.error(c.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,r.name.range);var i=this.ensureFunctionType(e.signature),a=this.module;if(n){var o=e.signature.returnType,s=this.currentFunction;this.currentFunction=e;var p=e.flow,l=void 0;if(n.kind==h.NodeKind.EXPRESSION)assert(e.is(u.CommonFlags.ARROW)),l=this.compileExpression(n.expression,o),p.set(1);else{assert(n.kind==h.NodeKind.BLOCK),l=this.compileStatement(n);var d=p.finalize();o==_.Type.void||d||this.error(c.DiagnosticCode.A_function_whose_declared_type_is_not_void_must_return_a_value,r.signature.returnType.range)}this.currentFunction=s,t=a.addFunction(e.internalName,i,_.typesToNativeTypes(e.additionalLocals),l)}else{e.set(u.CommonFlags.MODULE_IMPORT);var y=e.prototype.namespace;t=a.addFunctionImport(e.internalName,y?y.simpleName:"env",e.simpleName,i)}return r.range.source.isEntry&&r.isTopLevelExport&&a.addFunctionExport(e.internalName,r.name.text),e.finalize(a,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 h.NodeKind.CLASSDECLARATION:!r&&!a.is(u.CommonFlags.EXPORT)||a.isGeneric||this.compileClassDeclaration(a,[]);break;case h.NodeKind.INTERFACEDECLARATION:!r&&!a.is(u.CommonFlags.EXPORT)||a.isGeneric||this.compileInterfaceDeclaration(a,[]);break;case h.NodeKind.ENUMDECLARATION:(r||a.is(u.CommonFlags.EXPORT))&&this.compileEnumDeclaration(a);break;case h.NodeKind.FUNCTIONDECLARATION:!r&&!a.is(u.CommonFlags.EXPORT)||a.isGeneric||this.compileFunctionDeclaration(a,[]);break;case h.NodeKind.NAMESPACEDECLARATION:(r||a.is(u.CommonFlags.EXPORT))&&this.compileNamespaceDeclaration(a);break;case h.NodeKind.VARIABLE:if(r||a.is(u.CommonFlags.EXPORT)){var o=this.compileVariableStatement(a,!0);o&&this.startFunctionBody.push(o)}break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,a.range)}}},t.prototype.compileNamespace=function(e){if(e.members){var t,r,n=this.options.noTreeShaking;try{for(var i=a(e.members.values()),o=i.next();!o.done;o=i.next()){var s=o.value;switch(s.kind){case u.ElementKind.CLASS_PROTOTYPE:!n&&!s.is(u.CommonFlags.EXPORT)||s.is(u.CommonFlags.GENERIC)||this.compileClassUsingTypeArguments(s,[]);break;case u.ElementKind.ENUM:this.compileEnum(s);break;case u.ElementKind.FUNCTION_PROTOTYPE:!n&&!s.is(u.CommonFlags.EXPORT)||s.is(u.CommonFlags.GENERIC)||this.compileFunctionUsingTypeArguments(s,[],null,s.declaration.name);break;case u.ElementKind.GLOBAL:this.compileGlobal(s);break;case u.ElementKind.NAMESPACE:this.compileNamespace(s)}}}catch(e){t={error:e}}finally{try{o&&!o.done&&(r=i.return)&&r.call(i)}finally{if(t)throw t.error}}}},t.prototype.compileExportStatement=function(e){for(var t=this.module,r=this.program.fileLevelExports,n=e.members,i=0,a=n.length;i<a;++i){var o=n[i],s=e.range.source.internalPath+u.PATH_DELIMITER+o.externalName.text,p=r.get(s);if(p)switch(p.kind){case u.ElementKind.CLASS_PROTOTYPE:p.is(u.CommonFlags.GENERIC)||this.compileClassUsingTypeArguments(p,[]);break;case u.ElementKind.ENUM:this.compileEnum(p);break;case u.ElementKind.FUNCTION_PROTOTYPE:if(!p.is(u.CommonFlags.GENERIC)&&e.range.source.isEntry){var l=this.compileFunctionUsingTypeArguments(p,[],null,p.declaration.name);if(l){var h=l.prototype.declaration;h&&h.needsExplicitExport(o)&&t.addFunctionExport(l.internalName,o.externalName.text)}}break;case u.ElementKind.GLOBAL:if(this.compileGlobal(p)&&e.range.source.isEntry){var _=p.declaration;_&&_.needsExplicitExport(o)&&(p.is(u.CommonFlags.INLINED)?t.addGlobalExport(p.internalName,o.externalName.text):this.warning(c.DiagnosticCode.Cannot_export_a_mutable_global,o.range))}break;case u.ElementKind.NAMESPACE:this.compileNamespace(p)}}},t.prototype.compileClassDeclaration=function(e,t,r,n){void 0===r&&(r=null),void 0===n&&(n=null);var i=assert(this.program.elementsLookup.get(e.fileLevelInternalName));assert(i.kind==u.ElementKind.CLASS_PROTOTYPE),this.compileClassUsingTypeArguments(i,t,r,n)},t.prototype.compileClassUsingTypeArguments=function(e,t,r,n){void 0===r&&(r=null),void 0===n&&(n=null);var i=e.resolveUsingTypeArguments(t,r,n);i&&this.compileClass(i)},t.prototype.compileClass=function(e){return!!e.is(u.CommonFlags.COMPILED)||(e.set(u.CommonFlags.COMPILED),!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=p.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(u.CommonFlags.COMPILED)),e.functionTableIndex>=0)return e.functionTableIndex;var t=this.functionTable,r=t.length;return t.push(e),e.functionTableIndex=r,r},t.prototype.compileStatement=function(e){var t,r=this.module;switch(e.kind){case h.NodeKind.BLOCK:t=this.compileBlockStatement(e);break;case h.NodeKind.BREAK:t=this.compileBreakStatement(e);break;case h.NodeKind.CONTINUE:t=this.compileContinueStatement(e);break;case h.NodeKind.DO:t=this.compileDoStatement(e);break;case h.NodeKind.EMPTY:t=this.compileEmptyStatement(e);break;case h.NodeKind.EXPRESSION:t=this.compileExpressionStatement(e);break;case h.NodeKind.FOR:t=this.compileForStatement(e);break;case h.NodeKind.IF:t=this.compileIfStatement(e);break;case h.NodeKind.RETURN:t=this.compileReturnStatement(e);break;case h.NodeKind.SWITCH:t=this.compileSwitchStatement(e);break;case h.NodeKind.THROW:t=this.compileThrowStatement(e);break;case h.NodeKind.TRY:t=this.compileTryStatement(e);break;case h.NodeKind.VARIABLE:(t=this.compileVariableStatement(e))||(t=r.createNop());break;case h.NodeKind.VOID:t=this.compileVoidStatement(e);break;case h.NodeKind.WHILE:t=this.compileWhileStatement(e);break;case h.NodeKind.TYPEDECLARATION:if(this.currentFunction==this.startFunction)return r.createNop();default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),t=r.createUnreachable()}return this.options.sourceMap&&g(t,e.range,r,this.currentFunction),t},t.prototype.compileStatements=function(e){for(var t=e.length,r=new Array(t),n=0;n<t;++n)r[n]=this.compileStatement(e[n]);return r},t.prototype.compileBlockStatement=function(e){var t=e.statements,r=this.currentFunction.flow.enterBranchOrScope();this.currentFunction.flow=r;var n=this.module.createBlock(null,this.compileStatements(t),p.NativeType.None),i=r.is(1);return r=r.leaveBranchOrScope(),this.currentFunction.flow=r,i&&r.set(1),n},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(4),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(8),t.createBreak(i))},t.prototype.compileDoStatement=function(e){var t=this.currentFunction,r=t.enterBreakContext(),n=t.flow,i=n.breakLabel,a=n.continueLabel,o="break|"+r;n.breakLabel=o;var s="continue|"+r;n.continueLabel=s;var c=this.compileStatement(e.statement);n.breakLabel=i,n.continueLabel=a;var u=this.module,l=f(this.compileExpression(e.condition,_.Type.i32,0),this.currentType,u);return this.currentFunction.leaveBreakContext(),u.createBlock(o,[u.createLoop(s,u.createBlock(null,[c,u.createBreak(s,l)],p.NativeType.None))],p.NativeType.None)},t.prototype.compileEmptyStatement=function(e){return this.module.createNop()},t.prototype.compileExpressionStatement=function(e){var t=this.compileExpression(e.expression,_.Type.void,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.enterBranchOrScope();t.flow=n;var i=n.breakLabel="break|"+r;n.breakLabel=i;var a="continue|"+r;n.continueLabel=a;var o=this.module,s=e.initializer?this.compileStatement(e.initializer):o.createNop(),c=e.condition?this.compileExpression(e.condition,_.Type.i32):o.createI32(1),u=e.incrementor?this.compileExpression(e.incrementor,_.Type.void):o.createNop(),l=this.compileStatement(e.statement),h=!e.condition&&n.is(1);n=n.leaveBranchOrScope(),t.flow=n,t.leaveBreakContext();var d=o.createBlock(i,[s,o.createLoop(a,o.createBlock(null,[o.createIf(c,o.createBlock(null,[l,u,o.createBreak(a)],p.NativeType.None))],p.NativeType.None))],p.NativeType.None);return h&&(n.set(1),d=o.createBlock(null,[d,o.createUnreachable()])),d},t.prototype.compileIfStatement=function(e){var t=this.module,r=this.currentFunction,n=e.ifTrue,i=e.ifFalse,a=f(this.compileExpression(e.condition,_.Type.i32,0),this.currentType,t);if(this.currentFunction.isAny(u.CommonFlags.GENERIC|u.CommonFlags.GENERIC_CONTEXT)&&_BinaryenExpressionGetId(a=this.precomputeExpressionRef(a))==p.ExpressionId.Const&&_BinaryenExpressionGetType(a)==p.NativeType.I32){return _BinaryenConstGetValueI32(a)?this.compileStatement(n):i?this.compileStatement(i):t.createNop()}var o=r.flow.enterBranchOrScope();r.flow=o;var s=this.compileStatement(n),c=o.is(1);o=o.leaveBranchOrScope(),r.flow=o;var l=0,h=!1;return i&&(o=o.enterBranchOrScope(),r.flow=o,l=this.compileStatement(i),h=o.is(1),o=o.leaveBranchOrScope(),r.flow=o),c&&h&&o.set(1),t.createIf(a,s,l)},t.prototype.compileReturnStatement=function(e){var t=this.currentFunction,r=0;return e.value&&(r=this.compileExpression(e.value,t.signature.returnType)),t.flow.set(1),this.module.createReturn(r)},t.prototype.compileSwitchStatement=function(e){var t=this.module,r=this.currentFunction,n=r.enterBreakContext(),i=r.getTempLocal(_.Type.u32),a=i.index,o=e.cases,s=o.length,c=new Array(1+s);c[0]=t.createSetLocal(a,this.compileExpression(e.condition,_.Type.u32));for(var u=1,l=-1,h=0;h<s;++h){var d=o[h].label;d?c[u++]=t.createBreak("case"+h.toString(10)+"|"+n,t.createBinary(p.BinaryOp.EqI32,t.createGetLocal(a,p.NativeType.I32),this.compileExpression(d,_.Type.i32))):l=h}r.freeTempLocal(i),c[u]=t.createBreak((l>=0?"case"+l.toString(10):"break")+"|"+n);var y=t.createBlock("case0|"+n,c,p.NativeType.None),m=!0;for(h=0;h<s;++h){var g=o[h].statements,E=g.length,T=new Array(1+E);T[0]=y;var f=r.flow.enterBranchOrScope();r.flow=f;var A="break|"+n;f.breakLabel=A;for(var I=h!=s-1,v=I?"case"+(h+1).toString(10)+"|"+n:A,N=0;N<E;++N)T[N+1]=this.compileStatement(g[N]);I||f.is(1)||(m=!1),r.flow=f.leaveBranchOrScope(),y=t.createBlock(v,T,p.NativeType.None)}return r.leaveBreakContext(),l>=0&&m&&r.flow.set(1),y},t.prototype.compileThrowStatement=function(e){var t=this.currentFunction.flow;return t.set(2),t.set(1),this.module.createUnreachable()},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.startFunction&&e.parent&&e.parent.kind==h.NodeKind.SOURCE){for(var o=0;o<a;++o)this.compileGlobalDeclaration(i[o]);return 0}var s=new Array;for(o=0;o<a;++o){var l=i[o],d=l.name.text,y=null,m=0;if(l.type){if(!(y=r.resolveType(l.type,n.contextualTypeArguments)))continue;l.initializer&&(m=this.compileExpression(l.initializer,y))}else{if(!l.initializer){this.error(c.DiagnosticCode.Type_expected,l.name.range.atEnd);continue}if(m=this.compileExpression(l.initializer,_.Type.void,0),this.currentType==_.Type.void){this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,l.range,this.currentType.toString(),"<auto>");continue}y=this.currentType}if(l.is(u.CommonFlags.CONST))if(m){if(m=this.precomputeExpressionRef(m),_BinaryenExpressionGetId(m)==p.ExpressionId.Const){var g=new u.Local(r,d,-1,y);switch(_BinaryenExpressionGetType(m)){case p.NativeType.I32:g=g.withConstantIntegerValue(_BinaryenConstGetValueI32(m),0);break;case p.NativeType.I64:g=g.withConstantIntegerValue(_BinaryenConstGetValueI64Low(m),_BinaryenConstGetValueI64High(m));break;case p.NativeType.F32:g=g.withConstantFloatValue(_BinaryenConstGetValueF32(m));break;case p.NativeType.F64:g=g.withConstantFloatValue(_BinaryenConstGetValueF64(m));break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,l.range),this.module.createUnreachable()}var E=n.flow.scopedLocals;if(E){if(E.has(d))return this.error(c.DiagnosticCode.Duplicate_identifier_0,l.name.range,d),0}else n.flow.scopedLocals=E=new Map;return E.set(d,g),0}this.warning(c.DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,l.range)}else this.error(c.DiagnosticCode._const_declarations_must_be_initialized,l.range);l.is(u.CommonFlags.LET)?n.flow.addScopedLocal(d,y,l.name):n.addLocal(y,d),m&&s.push(this.compileAssignmentWithValue(l.name,m))}return s.length?1==s.length?s[0]:this.module.createBlock(null,s,p.NativeType.None):0},t.prototype.compileVoidStatement=function(e){return this.compileExpression(e.expression,_.Type.void,2,!1)},t.prototype.compileWhileStatement=function(e){var t=this.module,r=f(this.compileExpression(e.condition,_.Type.i32,0),this.currentType,t);if(this.currentFunction.isAny(u.CommonFlags.GENERIC|u.CommonFlags.GENERIC_CONTEXT)&&_BinaryenExpressionGetId(r=this.precomputeExpressionRef(r))==p.ExpressionId.Const&&_BinaryenExpressionGetType(r)==p.NativeType.I32&&!_BinaryenConstGetValueI32(r))return t.createNop();var n=this.currentFunction,i=n.enterBreakContext(),a=n.flow.enterBranchOrScope();n.flow=a;var o="break|"+i;a.breakLabel=o;var s="continue|"+i;a.continueLabel=s;var c=this.compileStatement(e.statement);n.flow=a.leaveBranchOrScope(),n.leaveBreakContext();var l=t.createBlock(o,[t.createLoop(s,t.createIf(r,t.createBlock(null,[c,t.createBreak(s)],p.NativeType.None)))],p.NativeType.None);return l},t.prototype.compileInlineConstant=function(e,t,r){assert(e.is(u.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 11:return this.module.createF32(e.constantFloatValue);case 12:return this.module.createF64(e.constantFloatValue);default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.declaration.range),this.module.createUnreachable()}},t.prototype.compileExpression=function(e,t,r,n){var i;switch(void 0===r&&(r=1),void 0===n&&(n=!0),this.currentType=t,e.kind){case h.NodeKind.ASSERTION:i=this.compileAssertionExpression(e,t);break;case h.NodeKind.BINARY:i=this.compileBinaryExpression(e,t,n);break;case h.NodeKind.CALL:i=this.compileCallExpression(e,t);break;case h.NodeKind.COMMA:i=this.compileCommaExpression(e,t);break;case h.NodeKind.ELEMENTACCESS:i=this.compileElementAccessExpression(e,t);break;case h.NodeKind.FUNCTION:i=this.compileFunctionExpression(e,t);break;case h.NodeKind.IDENTIFIER:case h.NodeKind.FALSE:case h.NodeKind.NULL:case h.NodeKind.THIS:case h.NodeKind.TRUE:i=this.compileIdentifierExpression(e,t,0==r);break;case h.NodeKind.LITERAL:i=this.compileLiteralExpression(e,t);break;case h.NodeKind.NEW:i=this.compileNewExpression(e,t);break;case h.NodeKind.PARENTHESIZED:i=this.compileParenthesizedExpression(e,t,n);break;case h.NodeKind.PROPERTYACCESS:i=this.compilePropertyAccessExpression(e,t,0==r);break;case h.NodeKind.TERNARY:i=this.compileTernaryExpression(e,t);break;case h.NodeKind.UNARYPOSTFIX:i=this.compileUnaryPostfixExpression(e,t);break;case h.NodeKind.UNARYPREFIX:i=this.compileUnaryPrefixExpression(e,t,n);break;default:assert(!1),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,e),this.currentType=t),this.options.sourceMap&&g(i,e.range,this.module,this.currentFunction),i},t.prototype.compileExpressionRetainType=function(e,t,r){return void 0===r&&(r=!0),this.compileExpression(e,t==_.Type.void?_.Type.i32:t,0,r)},t.prototype.precomputeExpression=function(e,t,r){return void 0===r&&(r=1),this.precomputeExpressionRef(this.compileExpression(e,t,r))},t.prototype.precomputeExpressionRef=function(e){var t=this.module,r=this.currentType,n=r.toNativeType(),i=t.getFunctionTypeBySignature(n,null);i||(i=t.addFunctionType(r.toSignatureString(),n,null));var a=t.addFunction("__precompute",i,null,e);t.runPasses(["precompute"],a);var o=_BinaryenFunctionGetBody(a);return t.removeFunction("__precompute"),o},t.prototype.convertExpression=function(e,t,r,n,i){assert(0!=n);var a=this.module;return 13==t.kind?(this.error(c.DiagnosticCode.Type_0_is_not_assignable_to_type_1,i.range,t.toString(),r.toString()),a.createUnreachable()):13==r.kind?a.createDrop(e):(1!=n||t.isAssignableTo(r)||this.error(c.DiagnosticCode.Conversion_from_type_0_to_1_requires_an_explicit_cast,i.range,t.toString(),r.toString()),t.is(8)?r.is(8)?11==t.kind?12==r.kind&&(e=a.createUnary(p.UnaryOp.PromoteF32,e)):11==r.kind&&(e=a.createUnary(p.UnaryOp.DemoteF64,e)):r.is(4)?11==t.kind?r.is(1)?r.is(64)?e=a.createUnary(p.UnaryOp.TruncF32ToI64,e):(e=a.createUnary(p.UnaryOp.TruncF32ToI32,e),r.is(32)&&(e=E(e,r,a))):r.is(64)?e=a.createUnary(p.UnaryOp.TruncF32ToU64,e):(e=a.createUnary(p.UnaryOp.TruncF32ToU32,e),r.is(32)&&(e=E(e,r,a))):r.is(1)?r.is(64)?e=a.createUnary(p.UnaryOp.TruncF64ToI64,e):(e=a.createUnary(p.UnaryOp.TruncF64ToI32,e),r.is(32)&&(e=E(e,r,a))):r.is(64)?e=a.createUnary(p.UnaryOp.TruncF64ToU64,e):(e=a.createUnary(p.UnaryOp.TruncF64ToU32,e),r.is(32)&&(e=E(e,r,a))):(assert(0==r.flags,"void type expected"),e=a.createDrop(e)):t.is(4)&&r.is(8)?e=11==r.kind?t.is(64)?a.createUnary(t.is(1)?p.UnaryOp.ConvertI64ToF32:p.UnaryOp.ConvertU64ToF32,e):a.createUnary(t.is(1)?p.UnaryOp.ConvertI32ToF32:p.UnaryOp.ConvertU32ToF32,e):t.is(64)?a.createUnary(t.is(1)?p.UnaryOp.ConvertI64ToF64:p.UnaryOp.ConvertU64ToF64,e):a.createUnary(t.is(1)?p.UnaryOp.ConvertI32ToF64:p.UnaryOp.ConvertU32ToF64,e):t.is(64)?r.is(64)||(e=a.createUnary(p.UnaryOp.WrapI64,e),r.is(32)&&(e=E(e,r,a))):r.is(64)?e=a.createUnary(r.is(1)?p.UnaryOp.ExtendI32:p.UnaryOp.ExtendU32,e):r.is(32)&&(t.size>r.size||t.size==r.size&&t.is(1)!=r.is(1))&&(e=E(e,r,a)),this.currentType=r,e)},t.prototype.compileAssertionExpression=function(e,t){var r=this.program.resolveType(e.toType,this.currentFunction.contextualTypeArguments);return r?this.compileExpression(e.expression,r,2):this.module.createUnreachable()},t.prototype.compileBinaryExpression=function(e,t,r){void 0===r&&(r=!0);var n,i,a,o,s,u,h,d=this.module,y=e.left,m=e.right,g=!1,T=!1,A=null;switch(e.operator){case l.Token.LESSTHAN:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"<",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.LtI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.LtI64,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.LtI64:p.BinaryOp.LtI32,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.LtU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.LtU64:p.BinaryOp.LtU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.LtU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.LtF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.LtF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.GREATERTHAN:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,">",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.GtI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.GtI64:p.BinaryOp.GtI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.GtI64,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.GtU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.GtU64:p.BinaryOp.GtU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.GtU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.GtF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.GtF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.LESSTHAN_EQUALS:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"<=",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.LeI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.LeI64:p.BinaryOp.LeI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.LeI64,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.LeU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.LeU64:p.BinaryOp.LeU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.LeU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.LeF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.LeF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.GREATERTHAN_EQUALS:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!0)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,">=",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.GeI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.GeI64:p.BinaryOp.GeI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.GeI64,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.GeU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.GeU64:p.BinaryOp.GeU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.GeU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.GeF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.GeF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.EQUALS_EQUALS_EQUALS:case l.Token.EQUALS_EQUALS:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,l.operatorTokenToString(e.operator),i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.EqI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.EqI64:p.BinaryOp.EqI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.EqI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.EqF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.EqF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.EXCLAMATION_EQUALS_EQUALS:case l.Token.EXCLAMATION_EQUALS:if(n=this.compileExpressionRetainType(y,t),i=this.currentType,a=this.compileExpressionRetainType(m,i),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,l.operatorTokenToString(e.operator),i.toString(),o.toString()),this.currentType=t,d.createUnreachable();switch(n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m),s.kind){case 0:case 1:case 2:case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.NeI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.NeI64:p.BinaryOp.NeI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.NeI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.NeF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.NeF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}this.currentType=_.Type.bool;break;case l.Token.EQUALS:return this.compileAssignment(y,m,t);case l.Token.PLUS_EQUALS:g=!0;case l.Token.PLUS:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"+",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;case 2:case 7:h=d.createBinary(p.BinaryOp.AddI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.AddI64:p.BinaryOp.AddI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.AddI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.AddF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.AddF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.MINUS_EQUALS:g=!0;case l.Token.MINUS:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"-",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;case 2:case 7:h=d.createBinary(p.BinaryOp.SubI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.SubI64:p.BinaryOp.SubI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.SubI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.SubF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.SubF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.ASTERISK_EQUALS:g=!0;case l.Token.ASTERISK:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"*",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;case 2:case 7:h=d.createBinary(p.BinaryOp.MulI32,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.MulI64:p.BinaryOp.MulI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.MulI64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.MulF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.MulF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.SLASH_EQUALS:g=!0;case l.Token.SLASH:if(n=this.compileExpressionRetainType(y,t,!0),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"/",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:T=!0;case 2:h=d.createBinary(p.BinaryOp.DivI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.DivI64:p.BinaryOp.DivI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.DivI64,n,a);break;case 5:case 6:case 10:T=!0;case 7:h=d.createBinary(p.BinaryOp.DivU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.DivU64:p.BinaryOp.DivU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.DivU64,n,a);break;case 11:h=d.createBinary(p.BinaryOp.DivF32,n,a);break;case 12:h=d.createBinary(p.BinaryOp.DivF64,n,a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.PERCENT_EQUALS:g=!0;case l.Token.PERCENT:if(n=this.compileExpressionRetainType(y,t,!0),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"%",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 2:h=d.createBinary(p.BinaryOp.RemI32,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.RemI64:p.BinaryOp.RemI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.RemI64,n,a);break;case 5:case 6:case 7:case 10:h=d.createBinary(p.BinaryOp.RemU32,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.RemU64:p.BinaryOp.RemU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.RemU64,n,a);break;case 11:case 12:this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable();break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.LESSTHAN_LESSTHAN_EQUALS:g=!0;case l.Token.LESSTHAN_LESSTHAN:switch(n=this.compileExpressionRetainType(y,t,!1),a=this.compileExpression(m,this.currentType,1,!1),this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;default:h=d.createBinary(p.BinaryOp.ShlI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.ShlI64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.ShlI64:p.BinaryOp.ShlI32,n,a);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,l.operatorTokenToString(e.operator),this.currentType.toString()),d.createUnreachable();case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.GREATERTHAN_GREATERTHAN_EQUALS:g=!0;case l.Token.GREATERTHAN_GREATERTHAN:switch(n=this.compileExpressionRetainType(y,t,!0),a=this.compileExpression(m,this.currentType,1,!0),this.currentType.kind){default:h=d.createBinary(p.BinaryOp.ShrI32,n,a);break;case 3:h=d.createBinary(p.BinaryOp.ShrI64,n,a);break;case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.ShrI64:p.BinaryOp.ShrI32,n,a);break;case 5:case 6:case 10:case 7:h=d.createBinary(p.BinaryOp.ShrU32,n,a);break;case 8:h=d.createBinary(p.BinaryOp.ShrU64,n,a);break;case 9:h=d.createBinary(this.options.isWasm64?p.BinaryOp.ShrU64:p.BinaryOp.ShrU32,n,a);break;case 11:case 12:return this.error(c.DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,e.range,l.operatorTokenToString(e.operator),this.currentType.toString()),d.createUnreachable();case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN_EQUALS:g=!0;case l.Token.GREATERTHAN_GREATERTHAN_GREATERTHAN:switch(n=this.compileExpressionRetainType(y,t,!0),a=this.compileExpression(m,this.currentType,1,!0),this.currentType.kind){case 0:case 1:T=!0;default:h=d.createBinary(p.BinaryOp.ShrU32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.ShrU64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.ShrU64:p.BinaryOp.ShrU32,n,a);break;case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.AMPERSAND_EQUALS:g=!0;case l.Token.AMPERSAND:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"&",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;default:h=d.createBinary(p.BinaryOp.AndI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.AndI64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.AndI64:p.BinaryOp.AndI32,n,a);break;case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.BAR_EQUALS:g=!0;case l.Token.BAR:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"|",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;default:h=d.createBinary(p.BinaryOp.OrI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.OrI64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.OrI64:p.BinaryOp.OrI32,n,a);break;case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.CARET_EQUALS:g=!0;case l.Token.CARET:if(n=this.compileExpressionRetainType(y,t,!1),g)a=this.compileExpression(m,this.currentType,1,!1);else{if(i=this.currentType,a=this.compileExpressionRetainType(m,i,!1),o=this.currentType,!(s=_.Type.commonCompatible(i,o,!1)))return this.error(c.DiagnosticCode.Operator_0_cannot_be_applied_to_types_1_and_2,e.range,"^",i.toString(),o.toString()),this.currentType=t,d.createUnreachable();n=this.convertExpression(n,i,s,1,y),a=this.convertExpression(a,o,s,1,m)}switch(this.currentType.kind){case 0:case 1:case 5:case 6:case 10:T=!0;default:h=d.createBinary(p.BinaryOp.XorI32,n,a);break;case 3:case 8:h=d.createBinary(p.BinaryOp.XorI64,n,a);break;case 9:case 4:h=d.createBinary(this.options.isWasm64?p.BinaryOp.XorI64:p.BinaryOp.XorI32,n,a);break;case 13:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=d.createUnreachable()}break;case l.Token.AMPERSAND_AMPERSAND:n=this.compileExpressionRetainType(y,t),a=this.compileExpression(m,this.currentType,1,!1),(h=d.cloneExpression(n,!0,0))||(A=this.currentFunction.getAndFreeTempLocal(this.currentType),n=d.createTeeLocal(A.index,n)),T=this.currentType.is(36),u=f(n,this.currentType,d),h=h?d.createIf(u,a,h):d.createIf(u,a,d.createGetLocal(assert(A).index,this.currentType.toNativeType()));break;case l.Token.BAR_BAR:n=this.compileExpressionRetainType(y,t),a=this.compileExpression(m,this.currentType,1,!1),(h=this.module.cloneExpression(n,!0,0))||(A=this.currentFunction.getAndFreeTempLocal(this.currentType),n=d.createTeeLocal(A.index,n)),T=this.currentType.is(36),u=f(n,this.currentType,d),h=h?this.module.createIf(u,h,a):d.createIf(u,d.createGetLocal(assert(A).index,this.currentType.toNativeType()),a);break;default:assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),h=this.module.createUnreachable()}return T&&r&&(assert(this.currentType.is(36)),h=E(h,this.currentType,d)),g?this.compileAssignmentWithValue(y,h,t!=_.Type.void):h},t.prototype.compileAssignment=function(e,t,r){var n=this.currentFunction,i=this.program.resolveExpression(e,n);if(!i)return this.module.createUnreachable();var a,o=i.element;switch(o.kind){case u.ElementKind.GLOBAL:if(!this.compileGlobal(o))return this.module.createUnreachable();assert(o.type!=_.Type.void,"concrete type expected");case u.ElementKind.LOCAL:case u.ElementKind.FIELD:a=o.type;break;case u.ElementKind.PROPERTY:var s=o.setterPrototype;if(s){var p=s.resolve();if(!p)return this.module.createUnreachable();assert(1==p.signature.parameterTypes.length),a=p.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,o.internalName),this.module.createUnreachable();case u.ElementKind.FUNCTION_PROTOTYPE:if(e.kind==h.NodeKind.ELEMENTACCESS&&i.target&&i.target.kind==u.ElementKind.CLASS){if(o.simpleName!=i.target.prototype.fnIndexedGet)return this.error(c.DiagnosticCode.Index_signature_is_missing_in_type_0,e.range,i.target.toString()),this.module.createUnreachable();var l=o.resolve(null);if(l){a=l.signature.returnType;break}}default:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()}var d=this.compileExpression(t,a);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.program.resolveExpression(e,this.currentFunction);if(!i)return n.createUnreachable();var a=i.element;switch(a.kind){case u.ElementKind.LOCAL:return this.currentType=r?a.type:_.Type.void,a.is(u.CommonFlags.CONST)?(this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,a.internalName),n.createUnreachable()):r?n.createTeeLocal(a.index,t):n.createSetLocal(a.index,t);case u.ElementKind.GLOBAL:if(!this.compileGlobal(a))return n.createUnreachable();var o=a.type;if(assert(o!=_.Type.void),this.currentType=r?o:_.Type.void,a.is(u.CommonFlags.CONST))return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,a.internalName),n.createUnreachable();if(r){var s=o.toNativeType(),p=a.internalName;return n.createBlock(null,[n.createSetGlobal(p,t),n.createGetGlobal(p,s)],s)}return n.createSetGlobal(a.internalName,t);case u.ElementKind.FIELD:if(a.is(u.CommonFlags.READONLY))return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,a.internalName),n.createUnreachable();assert(i.isInstanceTarget);var l=this.compileExpression(i.targetExpression,i.target.type);o=a.type;this.currentType=r?o:_.Type.void;s=o.toNativeType();if(r){var d=this.currentFunction.getAndFreeTempLocal(o).index;return n.createBlock(null,[n.createSetLocal(d,t),n.createStore(o.size>>3,l,n.createGetLocal(d,s),s,a.memoryOffset),n.createGetLocal(d,s)],s)}return n.createStore(o.size>>3,l,t,s,a.memoryOffset);case u.ElementKind.PROPERTY:var y=a.setterPrototype;if(y){if(!(I=y.resolve()))return n.createUnreachable();if(!r){if(I.is(u.CommonFlags.INSTANCE)){assert(i.isInstanceTarget);var m=this.compileExpression(i.targetExpression,i.target.type);return this.makeCallDirect(I,[m,t])}return this.makeCallDirect(I,[t])}var g=a.getterPrototype;if(assert(null!=g),!(T=g.resolve()))return n.createUnreachable();var E=(b=T.signature.returnType).toNativeType();if(I.is(u.CommonFlags.INSTANCE)){assert(i.isInstanceTarget);m=this.compileExpression(i.targetExpression,i.target.type),d=this.currentFunction.getAndFreeTempLocal(b).index;return n.createBlock(null,[this.makeCallDirect(I,[n.createTeeLocal(d,m),t]),this.makeCallDirect(T,[n.createGetLocal(d,E)])],E)}return n.createBlock(null,[this.makeCallDirect(I,[t]),this.makeCallDirect(T)],E)}return this.error(c.DiagnosticCode.Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property,e.range,a.internalName),n.createUnreachable();case u.ElementKind.FUNCTION_PROTOTYPE:if(e.kind==h.NodeKind.ELEMENTACCESS){var T;if(assert(i.isInstanceTarget),!(T=a.resolve()))return n.createUnreachable();var f=i.target.prototype.fnIndexedSet,A=void 0;if(null!=f&&i.target.members&&(A=i.target.members.get(f))&&A.kind==u.ElementKind.FUNCTION_PROTOTYPE){var I;if(!(I=A.resolve()))return n.createUnreachable();var v=i.target.type,N=(l=this.compileExpression(i.targetExpression,v),this.compileExpression(e.elementExpression,_.Type.i32));if(r){var C=this.currentFunction.getTempLocal(v),S=this.currentFunction.getAndFreeTempLocal(this.currentType),b=T.signature.returnType;return this.currentFunction.freeTempLocal(C),n.createBlock(null,[this.makeCallDirect(I,[n.createTeeLocal(C.index,l),n.createTeeLocal(S.index,N),t]),this.makeCallDirect(T,[n.createGetLocal(C.index,C.type.toNativeType()),n.createGetLocal(S.index,S.type.toNativeType())])],b.toNativeType())}return this.makeCallDirect(I,[l,N,t])}return this.error(c.DiagnosticCode.Index_signature_in_type_0_only_permits_reading,e.range,i.target.internalName),n.createUnreachable()}}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()},t.prototype.compileCallExpression=function(e,t){var r=this.module,n=this.currentFunction,i=this.program.resolveExpression(e.expression,n);if(!i)return r.createUnreachable();var a,o,l=i.element;switch(l.kind){case u.ElementKind.FUNCTION_PROTOTYPE:var h=l;if(h.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN)){var _=s.compileCall(this,h,h.resolveBuiltinTypeArguments(e.typeArguments,n.contextualTypeArguments),e.arguments,t,e);return _||(this.error(c.DiagnosticCode.Operation_not_supported,e.range),r.createUnreachable())}var d=h.resolveUsingTypeArguments(e.typeArguments,n.contextualTypeArguments,e);if(!d)return r.createUnreachable();var y=0;if(d.is(u.CommonFlags.INSTANCE)){if(assert(i.isInstanceTarget),!(y=this.compileExpression(i.targetExpression,i.target.type)))return r.createUnreachable()}else assert(!i.isInstanceTarget);return this.compileCallDirect(d,e.arguments,e,y);case u.ElementKind.LOCAL:if(a=l.type.functionType){o=r.createGetLocal(l.index,p.NativeType.I32);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,l.type.toString()),r.createUnreachable();case u.ElementKind.GLOBAL:if(a=l.type.functionType){o=r.createGetGlobal(l.internalName,l.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,l.type.toString()),r.createUnreachable();case u.ElementKind.FIELD:var m=l.type;if(a=m.functionType){var g=this.compileExpression(assert(i.targetExpression),m);o=r.createLoad(4,!1,g,p.NativeType.I32,l.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,l.type.toString()),r.createUnreachable();case u.ElementKind.FUNCTION_TARGET:a=l.signature,o=this.compileExpression(e.expression,l.type);break;case u.ElementKind.PROPERTY:default:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),r.createUnreachable()}return this.compileCallIndirect(a,o,e.arguments,e)},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,o=e.parameterTypes.length;return t<a?(this.error(a<o?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>o&&!i)||(this.error(c.DiagnosticCode.Expected_0_arguments_but_got_1,n.range,o.toString(),t.toString()),!1)},t.prototype.compileCallDirect=function(e,t,r,n){void 0===n&&(n=0);var i=t.length,a=e.signature;if(!this.checkCallSignature(a,i,0!=n,r))return this.module.createUnreachable();var o=n?i+1:i,s=new Array(o),c=0;n&&(s[0]=n,c=1);for(var p=a.parameterTypes,u=0;u<i;++u,++c)s[c]=this.compileExpression(t[u],p[u]);return assert(c==o),this.makeCallDirect(e,s)},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.parameterTypes,o=r.returnType,s=r.thisType,c=e.is(u.CommonFlags.INSTANCE),l=r.requiredParameters,h=l,d=i.length,y=d;c&&(++h,++y);var m=y-h;assert(m);var g=new Array(h),E=0,T=this.module;c&&(g[0]=T.createGetLocal(0,this.options.nativeSizeType),E=1);for(var f=0;f<l;++f,++E)g[E]=T.createGetLocal(E,i[f].toNativeType());assert(E==h);var A=new Array(d+1);for(f=0;f<d;++f)A[f]=i[f];A[d]=_.Type.i32;var I=new _.Signature(A,o,s),v=n+"|trampoline";I.requiredParameters=d+1,(t=new u.Function(e.prototype,v,I,e.memberOf)).flags=e.flags,t.contextualTypeArguments=e.contextualTypeArguments,t.set(u.CommonFlags.COMPILED),e.trampoline=t;var N=this.currentFunction;this.currentFunction=t;var C=m+1,S=new Array(C);for(f=0;f<C;++f){var b="N="+f.toString();S[f]=b}var O=T.createBlock(S[0],[T.createBlock("N=invalid",[T.createSwitch(S,"N=invalid",T.createGetLocal(y,p.NativeType.I32))]),T.createUnreachable()]);for(f=0;f<m;++f,++E){var L=i[l+f];O=T.createBlock(S[f+1],[O,T.createSetLocal(E,this.compileExpression(assert(a[l+f].initializer),L))]),g[E]=T.createGetLocal(E,L.toNativeType())}this.currentFunction=N,assert(E==y);var k=this.ensureFunctionType(I),x=T.addFunction(v,k,_.typesToNativeTypes(t.additionalLocals),T.createBlock(null,[O,T.createCall(n,g,o.toNativeType())],o.toNativeType()));return t.finalize(T,x),t},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,o=a;e.is(u.CommonFlags.INSTANCE)&&(++i,++o,--n),assert(r>=i);var s=this.module;if(!this.compileFunction(e))return s.createUnreachable();if(r<o){if(e=this.ensureTrampoline(e),!this.compileFunction(e))return s.createUnreachable();t||((t=new Array(o+1)).length=0);for(var c=n;c<a;++c)t.push(e.signature.parameterTypes[c].toNativeZero(s));t.push(s.createI32(r-i))}var p=e.signature.returnType;return this.currentType=p,e.is(u.CommonFlags.MODULE_IMPORT)?s.createCallImport(e.internalName,t,p.toNativeType()):s.createCall(e.internalName,t,p.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 o=i?a+1:a,s=new Array(o),c=0;i&&(s[0]=i,c=1);for(var p=e.parameterTypes,u=0;u<a;++u,++c)s[c]=this.compileExpression(r[u],p[u]);return assert(c==o),this.makeCallIndirect(e,t,s)},t.prototype.makeCallIndirect=function(e,t,r){var n=e.returnType;return this.currentType=n,this.ensureFunctionType(e),this.module.createCallIndirect(t,r,e.toSignatureString())},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);return i[n]=this.compileExpression(r[n],t),this.module.createBlock(null,i,this.currentType.toNativeType())},t.prototype.compileElementAccessExpression=function(e,t){var r=this.program.resolveElementAccess(e,this.currentFunction);if(!r)return this.module.createUnreachable();assert(r.element.kind==u.ElementKind.FUNCTION_PROTOTYPE&&r.target&&r.target.kind==u.ElementKind.CLASS);var n=r.target,i=r.element.resolve(null,n.contextualTypeArguments);if(!i)return this.module.createUnreachable();var a=this.compileExpression(e.expression,n.type);return this.compileCallDirect(i,[e.elementExpression],e,a)},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,o=new u.FunctionPrototype(this.program,i,a.internalName+"~"+i,r),s=this.compileFunctionUsingTypeArguments(o,[],a.contextualTypeArguments,r);if(!s)return this.module.createUnreachable();this.currentType=_.Type.u32.asFunction(s.signature);var c=this.ensureFunctionTableEntry(s);return c<0?this.module.createUnreachable():this.module.createI32(c)},t.prototype.compileIdentifierExpression=function(e,t,r){var n=this.module;switch(e.kind){case h.NodeKind.NULL:var i=this.options;return t.classType||(this.currentType=i.usizeType),i.isWasm64?n.createI64(0):n.createI32(0);case h.NodeKind.TRUE:return this.currentType=_.Type.bool,n.createI32(1);case h.NodeKind.FALSE:return this.currentType=_.Type.bool,n.createI32(0);case h.NodeKind.THIS:if((l=this.currentFunction).is(u.CommonFlags.INSTANCE)){var a=assert(l.memberOf);assert(a.kind==u.ElementKind.CLASS);var o=a.type;return 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 h.NodeKind.SUPER:var l;if((l=this.currentFunction).is(u.CommonFlags.INSTANCE)){a=assert(l.memberOf);assert(a.kind==u.ElementKind.CLASS);var d=a.base;if(d){var y=d.type;return this.currentType=y,n.createGetLocal(0,y.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 m=this.program.resolveIdentifier(e,this.currentFunction,this.currentEnum);if(!m)return n.createUnreachable();var g=m.element;switch(g.kind){case u.ElementKind.LOCAL:if(g.is(u.CommonFlags.INLINED))return this.compileInlineConstant(g,t,r);var E=g.type,T=g.index;return assert(T>=0),this.currentType=E,this.module.createGetLocal(T,E.toNativeType());case u.ElementKind.GLOBAL:if(g.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN))return s.compileGetConstant(this,g,e);if(!this.compileGlobal(g))return this.module.createUnreachable();var f=g.type;return assert(f!=_.Type.void),g.is(u.CommonFlags.INLINED)?this.compileInlineConstant(g,t,r):(this.currentType=f,this.module.createGetGlobal(g.internalName,f.toNativeType()));case u.ElementKind.ENUMVALUE:return g.is(u.CommonFlags.COMPILED)?(this.currentType=_.Type.i32,g.is(u.CommonFlags.INLINED)?this.module.createI32(g.constantValue):this.module.createGetGlobal(g.internalName,p.NativeType.I32)):(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 A=g.resolve(null,this.currentFunction.contextualTypeArguments);if(!A||!this.compileFunction(A))return n.createUnreachable();var I=this.ensureFunctionTableEntry(A);return this.currentType=_.Type.u32.asFunction(A.signature),this.module.createI32(I)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.module.createUnreachable()},t.prototype.compileLiteralExpression=function(e,t,r){void 0===r&&(r=!1);var n=this.module;switch(e.literalKind){case h.LiteralKind.ARRAY:assert(!r);var i=t.classType;return i&&i.prototype==this.program.elementsLookup.get("Array")?this.compileStaticArray(assert(i.typeArguments)[0],e.elementExpressions,e):(this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable());case h.LiteralKind.FLOAT:var a=e.value;return r&&(a=-a),t==_.Type.f32?n.createF32(a):(this.currentType=_.Type.f64,n.createF64(a));case h.LiteralKind.INTEGER:var o=e.value;switch(r&&(o=i64_sub(i64_new(0),o)),t.kind){case 0:if(i64_is_i8(o))return n.createI32(i64_low(o));break;case 1:if(i64_is_i16(o))return n.createI32(i64_low(o));break;case 2:if(i64_is_i32(o))return n.createI32(i64_low(o));break;case 5:if(i64_is_u8(o))return n.createI32(i64_low(o));break;case 6:if(i64_is_u16(o))return n.createI32(i64_low(o));break;case 7:if(i64_is_u32(o))return n.createI32(i64_low(o));break;case 10:if(i64_is_bool(o))return n.createI32(i64_low(o));break;case 4:case 9:if(!this.options.isWasm64){if(i64_is_u32(o))return n.createI32(i64_low(o));break}return n.createI64(i64_low(o),i64_high(o));case 3:case 8:return n.createI64(i64_low(o),i64_high(o));case 11:if(i64_is_f32(o))return n.createF32(i64_to_f32(o));break;case 12:if(i64_is_f64(o))return n.createF64(i64_to_f64(o));break;case 13:break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),n.createUnreachable()}return i64_is_i32(o)?(this.currentType=_.Type.i32,n.createI32(i64_low(o))):(this.currentType=_.Type.i64,n.createI64(i64_low(o),i64_high(o)));case h.LiteralKind.STRING:return assert(!r),this.compileStaticString(e.value)}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),this.currentType=t,n.createUnreachable()},t.prototype.compileStaticString=function(e){var t=this.module,r=this.options,n=this.stringSegments,i=n.get(e);if(!i){var a=e.length,o=new Uint8Array(4+2*a);o[0]=255&a,o[1]=a>>>8&255,o[2]=a>>>16&255,o[3]=a>>>24&255;for(var s=0;s<a;++s)o[4+2*s]=255&e.charCodeAt(s),o[5+2*s]=e.charCodeAt(s)>>>8&255;i=this.addMemorySegment(o,r.usizeType.byteSize),n.set(e,i)}var c=i.offset,p=this.program.typesLookup.get("string");return this.currentType=p||r.usizeType,r.isWasm64?t.createI64(i64_low(c),i64_high(c)):(assert(i64_is_i32(c)),t.createI32(i64_low(c)))},t.prototype.compileStaticArray=function(e,t,r){var n=!0,i=this.module,a=assert(this.program.elementsLookup.get("Array"));if(!a||a.kind!=u.ElementKind.CLASS_PROTOTYPE)return i.createUnreachable();var o=a.resolve([e]);if(!o)return i.createUnreachable();var s,l,h=t.length,_=e.toNativeType();switch(_){case p.NativeType.I32:s=changetype(new Int32Array(h)),l=4*h;break;case p.NativeType.I64:s=changetype(new Array(h)),l=8*h;break;case p.NativeType.F32:s=changetype(new Float32Array(h)),l=4*h;break;case p.NativeType.F64:s=changetype(new Float64Array(h)),l=8*h;break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,r.range),i.createUnreachable()}for(var y,m=new Array(h),g=0;g<h;++g)if(m[g]=t[g]?this.compileExpression(t[g],e):e.toNativeZero(i),n)if(y=this.precomputeExpressionRef(m[g]),_BinaryenExpressionGetId(y)==p.ExpressionId.Const)switch(assert(_BinaryenExpressionGetType(y)==_),_){case p.NativeType.I32:changetype(s)[g]=_BinaryenConstGetValueI32(y);break;case p.NativeType.I64:changetype(s)[g]=i64_new(_BinaryenConstGetValueI64Low(y),_BinaryenConstGetValueI64High(y));break;case p.NativeType.F32:changetype(s)[g]=_BinaryenConstGetValueF32(y);break;case p.NativeType.F64:changetype(s)[g]=_BinaryenConstGetValueF64(y);break;default:assert(!1)}else n=!1;var E=this.options.usizeType.byteSize,T=E+4+4;if(n){var f=new Uint8Array(T+l),A=this.addMemorySegment(f),I=0;switch(8==E?d.writeI64(i64_add(A.offset,i64_new(T)),f,0):(assert(0==i64_high(A.offset)),d.writeI32(i64_low(A.offset)+T,f,0)),I+=E,d.writeI32(h,f,I),I+=4,d.writeI32(h,f,I),I+=4,assert(I==T),_){case p.NativeType.I32:for(g=0;g<h;++g)d.writeI32(changetype(s)[g],f,I),I+=4;break;case p.NativeType.I64:for(g=0;g<h;++g)d.writeI64(changetype(s)[g],f,I),I+=8;break;case p.NativeType.F32:for(g=0;g<h;++g)d.writeF32(changetype(s)[g],f,I),I+=4;break;case p.NativeType.F64:for(g=0;g<h;++g)d.writeF64(changetype(s)[g],f,I),I+=8;break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,r.range),i.createUnreachable()}return assert(I==T+l),this.currentType=o.type,8==E?i.createI64(i64_low(A.offset),i64_high(A.offset)):i.createI32(i64_low(A.offset))}throw new Error("not implemented")},t.prototype.compileNewExpression=function(e,t){var r,n,i=this.module,o=this.options,p=this.currentFunction,l=this.program.resolveExpression(e.expression,p);if(l)if(l.element.kind==u.ElementKind.CLASS_PROTOTYPE){var h=l.element.resolveUsingTypeArguments(e.typeArguments,null,e);if(h){var _=s.compileAllocate(this,h,e),d=new Array,y=p.getTempLocal(o.usizeType);if(d.push(i.createSetLocal(y.index,_)),h.members)try{for(var m=a(h.members.values()),g=m.next();!g.done;g=m.next()){var E=g.value;if(E.kind==u.ElementKind.FIELD){var T=E,f=T.prototype.declaration;T.is(u.CommonFlags.CONST)?assert(!1):f&&f.initializer&&d.push(i.createStore(T.type.byteSize,i.createGetLocal(y.index,o.nativeSizeType),this.compileExpression(f.initializer,T.type),T.type.toNativeType(),T.memoryOffset))}}}catch(e){r={error:e}}finally{try{g&&!g.done&&(n=m.return)&&n.call(m)}finally{if(r)throw r.error}}var A=h.constructorInstance;return A&&d.push(this.compileCallDirect(A,e.arguments,e,i.createGetLocal(y.index,o.nativeSizeType))),d.push(i.createGetLocal(y.index,o.nativeSizeType)),p.freeTempLocal(y),_=i.createBlock(null,d,o.nativeSizeType),this.currentType=h.type,_}}else this.error(c.DiagnosticCode.Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature,e.expression.range);return i.createUnreachable()},t.prototype.compileParenthesizedExpression=function(e,t,r){return void 0===r&&(r=!0),this.compileExpression(e.expression,t,0,r)},t.prototype.compilePropertyAccessExpression=function(e,t,r){var n=this.program,i=this.module,a=n.resolvePropertyAccess(e,this.currentFunction);if(!a)return i.createUnreachable();var o,l=a.element;switch(l.kind){case u.ElementKind.GLOBAL:if(l.is(u.CommonFlags.AMBIENT|u.CommonFlags.BUILTIN))return s.compileGetConstant(this,l,e);if(!this.compileGlobal(l))return i.createUnreachable();var h=l.type;return assert(h!=_.Type.void),l.is(u.CommonFlags.INLINED)?this.compileInlineConstant(l,t,r):(this.currentType=h,i.createGetGlobal(l.internalName,h.toNativeType()));case u.ElementKind.ENUMVALUE:return this.compileEnum(l.enum)?(this.currentType=_.Type.i32,l.is(u.CommonFlags.INLINED)?i.createI32(l.constantValue):i.createGetGlobal(l.internalName,p.NativeType.I32)):this.module.createUnreachable();case u.ElementKind.FIELD:return assert(a.isInstanceTarget),assert(l.memoryOffset>=0),o=this.compileExpression(a.targetExpression,this.options.usizeType,0),this.currentType=l.type,i.createLoad(l.type.size>>3,l.type.is(5),o,l.type.toNativeType(),l.memoryOffset);case u.ElementKind.PROPERTY:var d=l.getterPrototype;if(d){var y=d.resolve(null);if(!y)return i.createUnreachable();var m=y.signature;if(!this.checkCallSignature(m,0,y.is(u.CommonFlags.INSTANCE),e))return i.createUnreachable();if(y.is(u.CommonFlags.INSTANCE)){var g=assert(y.memberOf);return assert(g.kind==u.ElementKind.CLASS),o=this.compileExpression(a.targetExpression,g.type),this.currentType=m.returnType,this.compileCallDirect(y,[],e,o)}return this.currentType=m.returnType,this.compileCallDirect(y,[],e)}return this.error(c.DiagnosticCode.Property_0_does_not_exist_on_type_1,e.range,l.simpleName,l.parent.toString()),i.createUnreachable()}return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable()},t.prototype.compileTernaryExpression=function(e,t){var r=e.ifThen,n=e.ifElse,i=f(this.compileExpression(e.condition,_.Type.u32,0),this.currentType,this.module);if(this.currentFunction.isAny(u.CommonFlags.GENERIC|u.CommonFlags.GENERIC_CONTEXT)&&_BinaryenExpressionGetId(i=this.precomputeExpressionRef(i))==p.ExpressionId.Const&&_BinaryenExpressionGetType(i)==p.NativeType.I32)return _BinaryenConstGetValueI32(i)?this.compileExpression(r,t):this.compileExpression(n,t);var a=this.compileExpression(r,t),o=this.compileExpression(n,t);return this.module.createIf(i,a,o)},t.prototype.compileUnaryPostfixExpression=function(e,t){var r,n,i,a,o=this.module,s=this.currentFunction,u=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),h=this.currentType,d=!1;switch(e.operator){case l.Token.PLUS_PLUS:if(h.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable();switch(h.kind){case 0:case 1:case 5:case 6:case 10:d=!0;default:r=p.BinaryOp.AddI32,n=p.NativeType.I32,i=o.createI32(1);break;case 9:case 4:r=(y=this.options).isWasm64?p.BinaryOp.AddI64:p.BinaryOp.AddI32,n=y.nativeSizeType,i=h.toNativeOne(o);break;case 3:case 8:r=p.BinaryOp.AddI64,n=p.NativeType.I64,i=o.createI64(1);break;case 11:r=p.BinaryOp.AddF32,n=p.NativeType.F32,i=o.createF32(1);break;case 12:r=p.BinaryOp.AddF64,n=p.NativeType.F64,i=o.createF64(1);break;case 13:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable()}break;case l.Token.MINUS_MINUS:if(h.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable();switch(h.kind){case 0:case 1:case 5:case 6:case 10:d=!0;default:r=p.BinaryOp.SubI32,n=p.NativeType.I32,i=o.createI32(1);break;case 9:case 4:var y;r=(y=this.options).isWasm64?p.BinaryOp.SubI64:p.BinaryOp.SubI32,n=y.nativeSizeType,i=h.toNativeOne(o);break;case 3:case 8:r=p.BinaryOp.SubI64,n=p.NativeType.I64,i=o.createI64(1);break;case 11:r=p.BinaryOp.SubF32,n=p.NativeType.F32,i=o.createF32(1);break;case 12:r=p.BinaryOp.SubF64,n=p.NativeType.F64,i=o.createF64(1);break;case 13:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable()}break;default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),o.createUnreachable()}var m=null;if(t==_.Type.void?a=o.createBinary(r,u,i):(m=s.getTempLocal(h),a=o.createBinary(r,this.module.createGetLocal(m.index,n),i)),d&&(assert(h.is(36)),a=E(a,h,o)),a=this.compileAssignmentWithValue(e.operand,a,!1),t==_.Type.void)return assert(!m),a;this.currentType=assert(m).type,s.freeTempLocal(m);var g=m.index;return o.createBlock(null,[o.createSetLocal(g,u),a,o.createGetLocal(g,n)],n)},t.prototype.compileUnaryPrefixExpression=function(e,t,r){void 0===r&&(r=!0);var n,i=this.module,a=this.currentType,o=!1,s=!1;switch(e.operator){case l.Token.PLUS:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),o=(a=this.currentType).is(36);break;case l.Token.MINUS:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();if(e.operand.kind!=h.NodeKind.LITERAL||e.operand.literalKind!=h.LiteralKind.INTEGER&&e.operand.literalKind!=h.LiteralKind.FLOAT)switch(n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),(a=this.currentType).kind){case 0:case 1:case 5:case 6:case 10:o=!0;default:n=i.createBinary(p.BinaryOp.SubI32,i.createI32(0),n);break;case 9:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();case 4:n=i.createBinary(this.options.isWasm64?p.BinaryOp.SubI64:p.BinaryOp.SubI32,a.toNativeZero(i),n);break;case 3:case 8:n=i.createBinary(p.BinaryOp.SubI64,i.createI64(0),n);break;case 11:n=i.createUnary(p.UnaryOp.NegF32,n);break;case 12:n=i.createUnary(p.UnaryOp.NegF64,n)}else n=this.compileLiteralExpression(e.operand,t,!0),this.options.sourceMap&&g(n,e.range,i,this.currentFunction),a=this.currentType;break;case l.Token.PLUS_PLUS:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();switch(s=!0,n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),(a=this.currentType).kind){case 0:case 1:case 5:case 6:case 10:o=!0;default:n=i.createBinary(p.BinaryOp.AddI32,n,this.module.createI32(1));break;case 9:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();case 4:n=i.createBinary(this.options.isWasm64?p.BinaryOp.AddI64:p.BinaryOp.AddI32,n,a.toNativeOne(i));break;case 3:case 8:n=i.createBinary(p.BinaryOp.AddI64,n,i.createI64(1));break;case 11:n=i.createBinary(p.BinaryOp.AddF32,n,i.createF32(1));break;case 12:n=i.createBinary(p.BinaryOp.AddF64,n,i.createF64(1))}break;case l.Token.MINUS_MINUS:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();switch(s=!0,n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!1),(a=this.currentType).kind){case 0:case 1:case 5:case 6:case 10:o=!0;default:n=i.createBinary(p.BinaryOp.SubI32,n,i.createI32(1));break;case 9:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();case 4:n=i.createBinary(this.options.isWasm64?p.BinaryOp.SubI64:p.BinaryOp.SubI32,n,a.toNativeOne(i));break;case 3:case 8:n=i.createBinary(p.BinaryOp.SubI64,n,i.createI64(1));break;case 11:n=i.createBinary(p.BinaryOp.SubF32,n,i.createF32(1));break;case 12:n=i.createBinary(p.BinaryOp.SubF64,n,i.createF64(1))}break;case l.Token.EXCLAMATION:n=T(n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t,0,!0),this.currentType,i),this.currentType=_.Type.bool;break;case l.Token.TILDE:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();switch(n=this.compileExpression(e.operand,t==_.Type.void?_.Type.i32:t.is(8)?_.Type.i64:t,t==_.Type.void?0:1,!1),(a=this.currentType).kind){case 0:case 1:case 5:case 6:case 10:o=!0;default:n=i.createBinary(p.BinaryOp.XorI32,n,i.createI32(-1));break;case 9:if(a.isReference)return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();case 4:n=i.createBinary(this.options.isWasm64?p.BinaryOp.XorI64:p.BinaryOp.XorI32,n,a.toNativeNegOne(i));break;case 3:case 8:n=i.createBinary(p.BinaryOp.XorI64,n,i.createI64(-1,-1))}break;case l.Token.TYPEOF:return this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable();default:return assert(!1),this.error(c.DiagnosticCode.Operation_not_supported,e.range),i.createUnreachable()}return o&&r&&(assert(a.is(36)),n=E(n,a,i)),s?this.compileAssignmentWithValue(e.operand,n,t!=_.Type.void):n},t}(c.DiagnosticEmitter);function g(e,t,r,n){var i=t.source;i.debugInfoIndex<0&&(i.debugInfoIndex=r.addDebugInfoFile(i.normalizedPath)),t.debugInfoRef=e,n.debugLocations||(n.debugLocations=[]),n.debugLocations.push(t)}function E(e,t,r){switch(t.kind){case 0:return r.createBinary(p.BinaryOp.ShrI32,r.createBinary(p.BinaryOp.ShlI32,e,r.createI32(24)),r.createI32(24));case 1:return r.createBinary(p.BinaryOp.ShrI32,r.createBinary(p.BinaryOp.ShlI32,e,r.createI32(16)),r.createI32(16));case 5:return r.createBinary(p.BinaryOp.AndI32,e,r.createI32(255));case 6:return r.createBinary(p.BinaryOp.AndI32,e,r.createI32(65535));case 10:return r.createBinary(p.BinaryOp.AndI32,e,r.createI32(1));default:return assert(!1),e}}function T(e,t,r){switch(t.kind){default:return r.createUnary(p.UnaryOp.EqzI32,e);case 3:case 8:return r.createUnary(p.UnaryOp.EqzI64,e);case 9:case 4:return r.createUnary(64==t.size?p.UnaryOp.EqzI64:p.UnaryOp.EqzI32,e);case 11:return r.createBinary(p.BinaryOp.EqF32,e,r.createF32(0));case 12:return r.createBinary(p.BinaryOp.EqF64,e,r.createF64(0));case 13:return assert(!1),r.createI32(1)}}function f(e,t,r){switch(t.kind){default:return e;case 3:case 8:return r.createBinary(p.BinaryOp.NeI64,e,r.createI64(0));case 9:case 4:return 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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.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.Structs_cannot_extend_classes_and_vice_versa=207]="Structs_cannot_extend_classes_and_vice_versa",e[e.Structs_cannot_implement_interfaces=208]="Structs_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.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.Enum_member_must_have_initializer=1061]="Enum_member_must_have_initializer",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.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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100:return"Operation not supported.";case 101:return"Operation is unsafe.";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"Structs cannot extend classes and vice-versa.";case 208:return"Structs cannot implement interfaces.";case 209:return"Invalid regular expression flags.";case 210:return"Implementation '{0}' must match the signature '{1}'.";case 1002:return"Unterminated string literal.";case 1003:return"Identifier expected.";case 1005:return"'{0}' expected.";case 1006:return"A file cannot have a reference to itself.";case 1009:return"Trailing comma not allowed.";case 1012:return"Unexpected token.";case 1014:return"A rest parameter must be last in a parameter list.";case 1015:return"Parameter cannot have question mark and initializer.";case 1016:return"A required parameter cannot follow an optional parameter.";case 1061:return"Enum member must have initializer.";case 1036:return"Statements are not allowed in ambient contexts.";case 1039:return"Initializers are not allowed in ambient contexts.";case 1042:return"'{0}' modifier cannot be used here.";case 1047:return"A rest parameter cannot be optional.";case 1048:return"A rest parameter cannot have an initializer.";case 1049:return"A 'set' accessor must have exactly one parameter.";case 1052:return"A 'set' accessor parameter cannot have an initializer.";case 1054:return"A 'get' accessor cannot have parameters.";case 1092:return"Type parameters cannot appear on a constructor declaration.";case 1093:return"Type annotation cannot appear on a constructor declaration.";case 1094:return"An accessor cannot have type parameters.";case 1095:return"A 'set' accessor cannot have a return type annotation.";case 1098:return"Type parameter list cannot be empty.";case 1104:return"A 'continue' statement can only be used within an enclosing iteration statement.";case 1105:return"A 'break' statement can only be used within an enclosing iteration or switch statement.";case 1108:return"A 'return' statement can only be used within a function body.";case 1109:return"Expression expected.";case 1110:return"Type expected.";case 1113:return"A 'default' clause cannot appear more than once in a 'switch' statement.";case 1114:return"Duplicate label '{0}'.";case 1121:return"Octal literals are not allowed in strict mode.";case 1124:return"Digit expected.";case 1125:return"Hexadecimal digit expected.";case 1126:return"Unexpected end of text.";case 1127:return"Invalid character.";case 1130:return"'case' or 'default' expected.";case 1038:return"A 'declare' modifier cannot be used in an already ambient context.";case 1140:return"Type argument expected.";case 1141:return"String literal expected.";case 1142:return"Line break not permitted here.";case 1146:return"Declaration expected.";case 1155:return"'const' declarations must be initialized.";case 1161:return"Unterminated regular expression literal.";case 1177:return"Binary digit expected.";case 1178:return"Octal digit expected.";case 1183:return"An implementation cannot be declared in ambient contexts.";case 1198:return"An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive.";case 1199:return"Unterminated Unicode escape sequence.";case 1206:return"Decorators are not valid here.";case 1242:return"'abstract' modifier can only appear on a class, method, or property declaration.";case 1311:return"A class may only extend another class.";case 2300:return"Duplicate identifier '{0}'.";case 2304:return"Cannot find name '{0}'.";case 2305:return"Module '{0}' has no exported member '{1}'.";case 2314:return"Generic type '{0}' requires {1} type argument(s).";case 2315:return"Type '{0}' is not generic.";case 2322:return"Type '{0}' is not assignable to type '{1}'.";case 2329:return"Index signature is missing in type '{0}'.";case 2332:return"'this' cannot be referenced in current location.";case 2335:return"'super' can only be referenced in a derived class.";case 2339:return"Property '{0}' does not exist on type '{1}'.";case 2349:return"Cannot invoke an expression whose type lacks a call signature. 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 2469:return"The '{0}' operator cannot be applied to type '{1}'.";case 2484:return"Export declaration conflicts with exported declaration of '{0}'.";case 2540:return"Cannot assign to '{0}' because it is a constant or a read-only property.";case 2541:return"The target of an assignment must be a variable or a property access.";case 2542:return"Index signature in type '{0}' only permits reading.";case 2554:return"Expected {0} arguments, but got {1}.";case 2555:return"Expected at least {0} arguments, but got {1}.";case 2558:return"Expected {0} type arguments, but got {1}.";case 2651:return"A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums.";case 2694:return"Namespace '{0}' has no exported member '{1}'.";case 6054:return"File '{0}' not found.";default:return""}}},function(e,t,r){"use strict";var n,i=this&&this.__extends||(n=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])},function(e,t){function r(){this.constructor=e}n(e,t),e.prototype=null===t?Object.create(t):(r.prototype=t.prototype,new r)});Object.defineProperty(t,"__esModule",{value:!0});var a=r(0),o=r(6),s=r(2),c=r(1),p=r(5),u=a.LIBRARY_PREFIX+"builtins.ts",l=function(e){function t(){var t=e.call(this)||this;return t.backlog=new Array,t.seenlog=new Set,t.onComment=null,t.tryParseSignatureIsSignature=!1,t.program=new a.Program(t.diagnostics),t}return i(t,e),t.prototype.parseFile=function(e,t,r){for(var n=this.program,i=c.normalizePath(t),s=n.sources,l=0,h=s.length;l<h;++l)if(s[l].normalizedPath==i)return;this.seenlog.add(i);var _=new p.Source(i,e,r?p.SourceKind.ENTRY:t.startsWith(a.LIBRARY_PREFIX)&&t.indexOf(a.PATH_DELIMITER,a.LIBRARY_PREFIX.length)<0?p.SourceKind.LIBRARY:p.SourceKind.DEFAULT);s.push(_),_.normalizedPath==u&&_.set(a.CommonFlags.BUILTIN);var d=new o.Tokenizer(_,n.diagnostics);d.onComment=this.onComment,_.tokenizer=d;for(var y=_.statements;!d.skip(o.Token.ENDOFFILE);){var m=this.parseTopLevelStatement(d);m&&(m.parent=_,y.push(m))}d.finish()},t.prototype.parseTopLevelStatement=function(e,t){void 0===t&&(t=null);for(var r=a.CommonFlags.NONE,n=-1,i=null;e.skip(o.Token.AT);){n<0&&(n=e.tokenPos);var c=this.parseDecorator(e);if(!c)break;var u=c.name;if(u.kind==p.NodeKind.IDENTIFIER){var l=u.text;if("global"==l){r|=a.CommonFlags.GLOBAL;continue}if("unmananged"==l){r|=a.CommonFlags.UNMANAGED;continue}}i||(i=[]),i.push(c)}r|=e.source.flags&a.CommonFlags.BUILTIN;var h=0,_=0;e.skip(o.Token.EXPORT)&&(n<0&&(n=e.tokenPos),r|=a.CommonFlags.EXPORT,h=e.tokenPos,_=e.pos);var d=null!=t&&t.is(a.CommonFlags.AMBIENT);e.skip(o.Token.DECLARE)?(n<0&&(n=e.tokenPos),d&&this.error(s.DiagnosticCode.A_declare_modifier_cannot_be_used_in_an_already_ambient_context,e.range()),r|=a.CommonFlags.DECLARE|a.CommonFlags.AMBIENT):d&&(r|=a.CommonFlags.AMBIENT);var y=null,m=e.peek();switch(n<0&&(n=e.nextTokenPos),m){case o.Token.CONST:if(e.next(),r|=a.CommonFlags.CONST,e.skip(o.Token.ENUM)){y=this.parseEnum(e,r,i,n);break}y=this.parseVariable(e,r,i,n),i=null;break;case o.Token.LET:r|=a.CommonFlags.LET;case o.Token.VAR:e.next(),y=this.parseVariable(e,r,i,n),i=null;break;case o.Token.ENUM:e.next(),y=this.parseEnum(e,r,i,n),i=null;break;case o.Token.FUNCTION:e.next(),y=this.parseFunction(e,r,i,n),i=null;break;case o.Token.ABSTRACT:if(e.next(),r|=a.CommonFlags.ABSTRACT,!e.skip(o.Token.CLASS)){this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"class");break}case o.Token.CLASS:e.next(),y=this.parseClass(e,r,i,n),i=null;break;case o.Token.NAMESPACE:e.next(),y=this.parseNamespace(e,r,i,n),i=null;break;case o.Token.IMPORT:e.next(),y=(r|=a.CommonFlags.IMPORT)&a.CommonFlags.EXPORT?this.parseExportImport(e,n):this.parseImport(e);break;case o.Token.TYPE:e.next(),y=this.parseTypeDeclaration(e,r,i,n),i=null;break;default:r&a.CommonFlags.EXPORT?y=this.parseExport(e,r,n):(_&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(h,_),"export"),t||(y=this.parseStatement(e,!0)))}if(i)for(var g=0,E=i.length;g<E;++g)this.error(s.DiagnosticCode.Decorators_are_not_valid_here,i[g].range);return y},t.prototype.nextFile=function(){var e=this.backlog;return e.length?e.shift():null},t.prototype.finish=function(){if(this.backlog.length)throw new Error("backlog is not empty");return this.backlog=[],this.seenlog.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==o.Token.VOID)return p.Node.createType(p.Node.createIdentifierExpression("void",e.range()),[],!1,e.range(a,e.pos));if(i==o.Token.OPENPAREN){var c=e.skip(o.Token.OPENPAREN),u=this.tryParseSignature(e);if(u){if(c){if(!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),null;if(!e.skip(o.Token.BAR))return this.error(s.DiagnosticCode._0_expected,e.range(),"|"),null;e.skip(o.Token.NULL)||this.error(s.DiagnosticCode._0_expected,e.range(),"null"),u.isNullable=!0}return u}if(c||this.tryParseSignatureIsSignature)return this.error(s.DiagnosticCode.Unexpected_token,e.range()),null;if(!t)return this.error(s.DiagnosticCode.Unexpected_token,e.range()),null;var l=this.parseType(e,!1,r);if(!l)return null;if(!e.skip(o.Token.CLOSEPAREN))return r||this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"}"),null;(n=l).range.start=a,n.range.end=e.pos}else if(i==o.Token.THIS)n=p.Node.createType(p.Node.createThisExpression(e.range()),[],!1,e.range(a,e.pos));else if(i==o.Token.TRUE||i==o.Token.FALSE)n=p.Node.createType(p.Node.createIdentifierExpression("bool",e.range()),[],!1,e.range(a,e.pos));else if(i==o.Token.STRINGLITERAL)e.readString(),n=p.Node.createType(p.Node.createIdentifierExpression("string",e.range()),[],!1,e.range(a,e.pos));else{if(i!=o.Token.IDENTIFIER)return r||this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var h=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),_=new Array,d=!1;if(e.skip(o.Token.LESSTHAN)){do{var y=this.parseType(e,!0,r);if(!y)return null;_.push(y)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.GREATERTHAN))return r||this.error(s.DiagnosticCode._0_expected,e.range(e.pos),">"),null}if(e.skip(o.Token.BAR)){if(!e.skip(o.Token.NULL))return r||this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"null"),null;d=!0}n=p.Node.createType(h,_,d,e.range(a,e.pos))}for(;e.skip(o.Token.OPENBRACKET);){var m=e.tokenPos;if(!e.skip(o.Token.CLOSEBRACKET))return r||this.error(s.DiagnosticCode._0_expected,e.range(),"]"),null;var g=e.range(m,e.pos);d=!1;if(e.skip(o.Token.BAR)){if(!e.skip(o.Token.NULL))return r||this.error(s.DiagnosticCode._0_expected,e.range(),"null"),null;d=!0}if(n=p.Node.createType(p.Node.createIdentifierExpression("Array",g),[n],d,e.range(a,e.pos)),d)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(o.Token.CLOSEPAREN))c=!0,e.discard(r),i=[];else{c=!1;do{var u=p.ParameterKind.DEFAULT;if(e.skip(o.Token.DOT_DOT_DOT)&&(c=!0,e.discard(r),u=p.ParameterKind.REST),e.skip(o.Token.THIS)){if(!e.skip(o.Token.COLON))return e.reset(r),this.tryParseSignatureIsSignature=!1,null;c=!0,e.discard(r);var l=this.parseType(e,!1);if(!l)return null;if(l.kind!=p.NodeKind.TYPE)return this.error(s.DiagnosticCode.Operation_not_supported,l.range),this.tryParseSignatureIsSignature=!0,null;a=l}else{if(!e.skip(o.Token.IDENTIFIER))return c?this.error(s.DiagnosticCode.Identifier_expected,e.range()):e.reset(r),this.tryParseSignatureIsSignature=c,null;var h=p.Node.createIdentifierExpression(e.readIdentifier(),e.range(e.tokenPos,e.pos));if(e.skip(o.Token.QUESTION)&&(c=!0,e.discard(r),u==p.ParameterKind.REST?this.error(s.DiagnosticCode.A_rest_parameter_cannot_be_optional,e.range()):u=p.ParameterKind.OPTIONAL),e.skip(o.Token.COLON)){c=!0,e.discard(r);var _=this.parseType(e);if(!_)return this.tryParseSignatureIsSignature=c,null;var d=new p.ParameterNode;d.parameterKind=u,d.name=h,d.type=_,i?i.push(d):i=[d]}else c&&this.error(s.DiagnosticCode.Type_expected,e.range())}}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),this.tryParseSignatureIsSignature=c,null}return e.skip(o.Token.EQUALS_GREATERTHAN)?(c=!0,e.discard(r),(t=this.parseType(e))?(this.tryParseSignatureIsSignature=!0,p.Node.createSignature(i||[],t,a,!1,e.range(n,e.pos))):(this.tryParseSignatureIsSignature=c,null)):(c?this.error(s.DiagnosticCode._0_expected,e.range(),"=>"):e.reset(r),this.tryParseSignatureIsSignature=c,null)},t.prototype.parseDecorator=function(e){var t=e.tokenPos;if(e.skip(o.Token.IDENTIFIER)){for(var r=e.readIdentifier(),n=p.Node.createIdentifierExpression(r,e.range(t,e.pos));e.skip(o.Token.DOT);){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;r=e.readIdentifier(),n=p.Node.createPropertyAccessExpression(n,p.Node.createIdentifierExpression(r,e.range()),e.range(t,e.pos))}var i=void 0;if(!e.skip(o.Token.OPENPAREN))return p.Node.createDecorator(n,null,e.range(t,e.pos));if(i=this.parseArguments(e))return p.Node.createDecorator(n,i,e.range(t,e.pos))}else this.error(s.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(o.Token.COMMA));var s=p.Node.createVariableStatement(i,r,t,e.range(n,e.pos));return e.skip(o.Token.SEMICOLON),s},t.prototype.parseVariableDeclaration=function(e,t,r){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var n=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),i=t,c=null;e.skip(o.Token.COLON)&&(c=this.parseType(e));var u=null;if(e.skip(o.Token.EQUALS)){if(i&a.CommonFlags.AMBIENT&&this.error(s.DiagnosticCode.Initializers_are_not_allowed_in_ambient_contexts,e.range()),!(u=this.parseExpression(e,1)))return null}else i&a.CommonFlags.CONST?i&a.CommonFlags.AMBIENT||this.error(s.DiagnosticCode._const_declarations_must_be_initialized,n.range):c||this.error(s.DiagnosticCode.Type_expected,e.range(e.pos));return p.Node.createVariableDeclaration(n,c,u,r,i,o.Range.join(n.range,e.range()))},t.prototype.parseEnum=function(e,t,r,n){if(e.next()!=o.Token.IDENTIFIER)return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.next()!=o.Token.OPENBRACE)return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null;var c=new Array;if(!e.skip(o.Token.CLOSEBRACE)){do{var u=this.parseEnumValue(e,a.CommonFlags.NONE);if(!u)return null;c.push(u)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"}"),null}var l=p.Node.createEnumDeclaration(i,c,r,t,e.range(n,e.pos));return e.skip(o.Token.SEMICOLON),l},t.prototype.parseEnumValue=function(e,t){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var r=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),n=null;return e.skip(o.Token.EQUALS)&&!(n=this.parseExpression(e,1))?null:p.Node.createEnumValueDeclaration(r,n,t,o.Range.join(r.range,e.range()))},t.prototype.parseReturn=function(e){var t=null;if(e.peek(!0)!=o.Token.SEMICOLON&&e.nextToken!=o.Token.CLOSEBRACE&&!e.nextTokenOnNewLine&&!(t=this.parseExpression(e)))return null;var r=p.Node.createReturnStatement(t,e.range());return e.skip(o.Token.SEMICOLON),r},t.prototype.parseTypeParameters=function(e){var t=new Array;if(e.skip(o.Token.GREATERTHAN))this.error(s.DiagnosticCode.Type_parameter_list_cannot_be_empty,e.range());else{do{var r=this.parseTypeParameter(e);if(!r)return null;t.push(r)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.GREATERTHAN))return this.error(s.DiagnosticCode._0_expected,e.range(),">"),null}return t},t.prototype.parseTypeParameter=function(e){if(e.next()==o.Token.IDENTIFIER){var t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),r=null;if(e.skip(o.Token.EXTENDS)){var n=this.parseType(e);if(!n)return null;if(n.kind!=p.NodeKind.TYPE)return this.error(s.DiagnosticCode.Operation_not_supported,n.range),null;r=n}return p.Node.createTypeParameter(t,r,o.Range.join(t.range,e.range()))}return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseParameters=function(e){var t=new Array,r=null,n=!1,i=!1;if(e.peek()!=o.Token.CLOSEPAREN)do{var a=this.parseParameter(e);if(!a)return null;switch(r&&!i&&(this.error(s.DiagnosticCode.A_rest_parameter_must_be_last_in_a_parameter_list,r.name.range),i=!0),a.parameterKind){default:n&&this.error(s.DiagnosticCode.A_required_parameter_cannot_follow_an_optional_parameter,a.name.range);break;case p.ParameterKind.OPTIONAL:n=!0;break;case p.ParameterKind.REST:r=a}t.push(a)}while(e.skip(o.Token.COMMA));return e.skip(o.Token.CLOSEPAREN)?t:(this.error(s.DiagnosticCode._0_expected,e.range(),")"),null)},t.prototype.parseParameter=function(e,t){void 0===t&&(t=!1);var r=!1,n=!1,i=null;if(e.skip(o.Token.DOT_DOT_DOT)&&(r=!0,i=e.range()),e.skip(o.Token.IDENTIFIER)){r||(i=e.range());var a=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),c=null;if((n=e.skip(o.Token.QUESTION))&&r&&this.error(s.DiagnosticCode.A_rest_parameter_cannot_be_optional,a.range),e.skip(o.Token.COLON)){if(!(c=this.parseType(e)))return null}else c=p.Node.createOmittedType(e.range(e.pos));var u=null;return!e.skip(o.Token.EQUALS)||(r&&this.error(s.DiagnosticCode.A_rest_parameter_cannot_have_an_initializer,a.range),n?this.error(s.DiagnosticCode.Parameter_cannot_have_question_mark_and_initializer,a.range):n=!0,u=this.parseExpression(e,1))?p.Node.createParameter(a,c,u,r?p.ParameterKind.REST:n?p.ParameterKind.OPTIONAL:p.ParameterKind.DEFAULT,o.Range.join(i,e.range())):null}return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseFunction=function(e,t,r,n){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range(e.pos)),null;var i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),c=-1,u=null;if(e.skip(o.Token.LESSTHAN)){if(c=e.tokenPos,!(u=this.parseTypeParameters(e)))return null;t|=a.CommonFlags.GENERIC}if(!e.skip(o.Token.OPENPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"("),null;c<0&&(c=e.tokenPos);var l=this.parseParameters(e);if(!l)return null;var h=0!=(t&a.CommonFlags.SET);h&&(1!=l.length&&this.error(s.DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,i.range),l.length&&l[0].initializer&&this.error(s.DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,i.range)),t&a.CommonFlags.GET&&l.length&&this.error(s.DiagnosticCode.A_get_accessor_cannot_have_parameters,i.range);var _=null;if(e.skip(o.Token.COLON)&&!(_=this.parseType(e,!0,h)))return null;_||(_=p.Node.createOmittedType(e.range(e.pos)),h||this.error(s.DiagnosticCode.Type_expected,_.range));var d=p.Node.createSignature(l,_,null,!1,e.range(c,e.pos)),y=null;if(e.skip(o.Token.OPENBRACE)){if(t&a.CommonFlags.AMBIENT&&this.error(s.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,e.range()),!(y=this.parseBlockStatement(e,!1)))return null}else t&a.CommonFlags.AMBIENT||this.error(s.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,e.range(e.pos));var m=p.Node.createFunctionDeclaration(i,u,d,y,r,t,e.range(n,e.pos));return e.skip(o.Token.SEMICOLON),m},t.prototype.parseFunctionExpression=function(e){var t,r=e.tokenPos,n=!1;if(e.token==o.Token.FUNCTION){if(t=e.skip(o.Token.IDENTIFIER)?p.Node.createIdentifierExpression(e.readIdentifier(),e.range()):p.Node.createEmptyIdentifierExpression(e.range(e.pos)),!e.skip(o.Token.OPENPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"("),null}else n=!0,assert(e.token==o.Token.OPENPAREN),t=p.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,i,c){void 0===i&&(i=-1),void 0===c&&(c=-1),i<0&&(i=t.range.start),c<0&&(c=i);var u=null;if(e.skip(o.Token.COLON)){if(!(u=this.parseType(e)))return null}else u=p.Node.createOmittedType(e.range(e.pos)),this.error(s.DiagnosticCode.Type_expected,u.range);if(n&&!e.skip(o.Token.EQUALS_GREATERTHAN))return this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"=>"),null;var l,h=p.Node.createSignature(r,u,null,!1,e.range(c,e.pos));if(n)l=this.parseStatement(e,!1);else{if(!e.skip(o.Token.OPENBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(e.pos),"{"),null;l=this.parseBlockStatement(e,!1)}if(!l)return null;var _=p.Node.createFunctionDeclaration(t,null,h,l,null,n?a.CommonFlags.ARROW:a.CommonFlags.NONE,e.range(i,e.pos));return p.Node.createFunctionExpression(_)},t.prototype.parseClass=function(e,t,r,n){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var i,c=p.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.skip(o.Token.LESSTHAN)){if(!(i=this.parseTypeParameters(e)))return null;t|=a.CommonFlags.GENERIC}else i=[];var u=null;if(e.skip(o.Token.EXTENDS)){var l=this.parseType(e);if(!l)return null;if(l.kind!=p.NodeKind.TYPE)return this.error(s.DiagnosticCode.Operation_not_supported,l.range),null;u=l}var h=new Array;if(e.skip(o.Token.IMPLEMENTS))do{var _=this.parseType(e);if(!_)return null;h.push(_)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.OPENBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null;var d=new Array;if(!e.skip(o.Token.CLOSEBRACE))do{var y=this.parseClassMember(e,t);if(!y)return null;d.push(y)}while(!e.skip(o.Token.CLOSEBRACE));return p.Node.createClassDeclaration(c,i,u,h,d,r,t,e.range(n,e.pos))},t.prototype.parseClassMember=function(e,t){for(var r=e.pos,n=new Array;e.skip(o.Token.AT);){var i=this.parseDecorator(e);if(!i)break;n.push(i)}var c=t&a.CommonFlags.AMBIENT;e.skip(o.Token.PUBLIC)?c|=a.CommonFlags.PUBLIC:e.skip(o.Token.PRIVATE)?c|=a.CommonFlags.PRIVATE:e.skip(o.Token.PROTECTED)&&(c|=a.CommonFlags.PROTECTED);var u=0,l=0,h=0,_=0;e.skip(o.Token.STATIC)?(c|=a.CommonFlags.STATIC,u=e.tokenPos,l=e.pos):(e.skip(o.Token.ABSTRACT)?(c|=a.CommonFlags.ABSTRACT|a.CommonFlags.INSTANCE,h=e.tokenPos,_=e.pos):c|=a.CommonFlags.INSTANCE,t&a.CommonFlags.GENERIC&&(c|=a.CommonFlags.GENERIC_CONTEXT));var d=0,y=0;e.skip(o.Token.READONLY)&&(c|=a.CommonFlags.READONLY,d=e.tokenPos,y=e.pos);var m=e.mark(),g=!1,E=!1,T=!1,f=0,A=0;if(e.skip(o.Token.GET)?e.peek(!0,!0)!=o.Token.IDENTIFIER||e.nextTokenOnNewLine?e.reset(m):(c|=a.CommonFlags.GET,E=!0,f=e.tokenPos,A=e.pos,c&a.CommonFlags.READONLY&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(d,y),"readonly")):e.skip(o.Token.SET)?e.peek(!0,!0)!=o.Token.IDENTIFIER||e.nextTokenOnNewLine?e.reset(m):(c|=a.CommonFlags.SET|a.CommonFlags.SET,T=!0,f=e.tokenPos,A=e.pos,c&a.CommonFlags.READONLY&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(d,y),"readonly")):e.skip(o.Token.CONSTRUCTOR)&&(g=!0,(c|=a.CommonFlags.CONSTRUCTOR)&a.CommonFlags.STATIC&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(u,l),"static"),c&a.CommonFlags.ABSTRACT&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(h,_),"abstract"),c&a.CommonFlags.READONLY&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(d,y),"readonly")),!g&&!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;var I=g?p.Node.createConstructorExpression(e.range()):p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),v=null;if(e.skip(o.Token.LESSTHAN)){var N=e.tokenPos;if(!(v=this.parseTypeParameters(e)))return null;g?this.error(s.DiagnosticCode.Type_parameters_cannot_appear_on_a_constructor_declaration,e.range(N,e.pos)):E||T?this.error(s.DiagnosticCode.An_accessor_cannot_have_type_parameters,e.range(N,e.pos)):c|=a.CommonFlags.GENERIC}if(e.skip(o.Token.OPENPAREN)){var C=e.tokenPos,S=this.parseParameters(e);if(!S)return null;E?S.length&&this.error(s.DiagnosticCode.A_get_accessor_cannot_have_parameters,I.range):T&&(1!=S.length&&this.error(s.DiagnosticCode.A_set_accessor_must_have_exactly_one_parameter,I.range),S.length&&S[0].initializer&&this.error(s.DiagnosticCode.A_set_accessor_parameter_cannot_have_an_initializer,I.range));var b=null;if(e.skip(o.Token.COLON)){if(I.kind==p.NodeKind.CONSTRUCTOR?this.error(s.DiagnosticCode.Type_annotation_cannot_appear_on_a_constructor_declaration,e.range()):T&&this.error(s.DiagnosticCode.A_set_accessor_cannot_have_a_return_type_annotation,e.range()),!(b=this.parseType(e,I.kind==p.NodeKind.CONSTRUCTOR||T)))return null}else b=p.Node.createOmittedType(e.range(e.pos)),T||I.kind==p.NodeKind.CONSTRUCTOR||this.error(s.DiagnosticCode.Type_expected,b.range);var O=p.Node.createSignature(S,b,null,!1,e.range(C,e.pos)),L=null;if(e.skip(o.Token.OPENBRACE)){if(c&a.CommonFlags.AMBIENT&&this.error(s.DiagnosticCode.An_implementation_cannot_be_declared_in_ambient_contexts,e.range()),!(L=this.parseBlockStatement(e,!1)))return null}else c&a.CommonFlags.AMBIENT||this.error(s.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,e.range());var k=p.Node.createMethodDeclaration(I,v,O,L,n,c,e.range(r,e.pos));return e.skip(o.Token.SEMICOLON),k}if(g)this.error(s.DiagnosticCode.Constructor_implementation_is_missing,I.range);else{if(!E&&!T){c&a.CommonFlags.ABSTRACT&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(h,_),"abstract"),c&a.CommonFlags.GET&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(0,0),"get"),c&a.CommonFlags.SET&&this.error(s.DiagnosticCode._0_modifier_cannot_be_used_here,e.range(f,A),"set");var x=null;if(e.skip(o.Token.COLON)){if(!(x=this.parseType(e)))return null}else this.error(s.DiagnosticCode.Type_expected,e.range());var R=null;if(e.skip(o.Token.EQUALS)&&!(R=this.parseExpression(e)))return null;var B=p.Node.createFieldDeclaration(I,x,R,n,c,e.range(r,e.pos));return e.skip(o.Token.SEMICOLON),B}this.error(s.DiagnosticCode.Function_implementation_is_missing_or_not_immediately_following_the_declaration,I.range)}return null},t.prototype.parseNamespace=function(e,t,r,n){if(e.skip(o.Token.IDENTIFIER)){var i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.skip(o.Token.OPENBRACE)){for(var a=new Array,c=p.Node.createNamespaceDeclaration(i,a,r,t,e.range(n,e.pos));!e.skip(o.Token.CLOSEBRACE);){var u=this.parseTopLevelStatement(e,c);if(!u)return null;u.parent=c,a.push(u)}return e.skip(o.Token.SEMICOLON),c}this.error(s.DiagnosticCode._0_expected,e.range(),"{")}else this.error(s.DiagnosticCode.Identifier_expected,e.range());return null},t.prototype.parseExport=function(e,t,r){if(e.skip(o.Token.OPENBRACE)){var n=new Array;if(!e.skip(o.Token.CLOSEBRACE)){do{var i=this.parseExportMember(e);if(!i)return null;n.push(i)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"}"),null}var a=null;if(e.skip(o.Token.FROM)){if(!e.skip(o.Token.STRINGLITERAL))return this.error(s.DiagnosticCode.String_literal_expected,e.range()),null;a=p.Node.createStringLiteralExpression(e.readString(),e.range())}var c=p.Node.createExportStatement(n,a,t,e.range(r,e.pos));return c.normalizedPath&&!this.seenlog.has(c.normalizedPath)&&(this.backlog.push(c.normalizedPath),this.seenlog.add(c.normalizedPath)),e.skip(o.Token.SEMICOLON),c}return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null},t.prototype.parseExportMember=function(e){if(e.skip(o.Token.IDENTIFIER)){var t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),r=null;if(e.skip(o.Token.AS)){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;r=p.Node.createIdentifierExpression(e.readIdentifier(),e.range())}return p.Node.createExportMember(t,r,r?o.Range.join(t.range,r.range):t.range)}return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseImport=function(e){var t=e.tokenPos,r=null,n=null,i=!1;if(e.skip(o.Token.OPENBRACE)){if(r=new Array,!e.skip(o.Token.CLOSEBRACE)){do{var a=this.parseImportDeclaration(e);if(!a)return null;r.push(a)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"}"),null}}else if(e.skip(o.Token.ASTERISK)){if(!e.skip(o.Token.AS))return this.error(s.DiagnosticCode._0_expected,e.range(),"as"),null;if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;n=p.Node.createIdentifierExpression(e.readIdentifier(),e.range())}else i=!0;if(i||e.skip(o.Token.FROM)){if(e.skip(o.Token.STRINGLITERAL)){var c=p.Node.createStringLiteralExpression(e.readString(),e.range()),u=void 0;return n?(assert(!r),u=p.Node.createImportStatementWithWildcard(n,c,e.range(t,e.pos))):u=p.Node.createImportStatement(r,c,e.range(t,e.pos)),this.seenlog.has(u.normalizedPath)||(this.backlog.push(u.normalizedPath),this.seenlog.add(u.normalizedPath)),e.skip(o.Token.SEMICOLON),u}this.error(s.DiagnosticCode.String_literal_expected,e.range())}else this.error(s.DiagnosticCode._0_expected,e.range(),"from");return null},t.prototype.parseImportDeclaration=function(e){if(e.skip(o.Token.IDENTIFIER)){var t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),r=null;if(e.skip(o.Token.AS)){if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;r=p.Node.createIdentifierExpression(e.readIdentifier(),e.range())}return p.Node.createImportDeclaration(t,r,r?o.Range.join(t.range,r.range):t.range)}return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null},t.prototype.parseExportImport=function(e,t){if(e.skip(o.Token.IDENTIFIER)){var r=p.Node.createIdentifierExpression(e.readIdentifier(),e.range());if(e.skip(o.Token.EQUALS)){if(e.skip(o.Token.IDENTIFIER)){var n=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),i=p.Node.createExportImportStatement(n,r,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),i}this.error(s.DiagnosticCode.Identifier_expected,e.range())}else this.error(s.DiagnosticCode._0_expected,e.range(),"=")}else this.error(s.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 o.Token.BREAK:n=this.parseBreak(e);break;case o.Token.CONST:n=this.parseVariable(e,a.CommonFlags.CONST,null,e.tokenPos);break;case o.Token.CONTINUE:n=this.parseContinue(e);break;case o.Token.DO:n=this.parseDoStatement(e);break;case o.Token.FOR:n=this.parseForStatement(e);break;case o.Token.IF:n=this.parseIfStatement(e);break;case o.Token.LET:n=this.parseVariable(e,a.CommonFlags.LET,null,e.tokenPos);break;case o.Token.VAR:n=this.parseVariable(e,a.CommonFlags.NONE,null,e.tokenPos);break;case o.Token.OPENBRACE:n=this.parseBlockStatement(e,t);break;case o.Token.RETURN:t&&this.error(s.DiagnosticCode.A_return_statement_can_only_be_used_within_a_function_body,e.range()),n=this.parseReturn(e);break;case o.Token.SEMICOLON:return p.Node.createEmptyStatement(e.range(e.tokenPos));case o.Token.SWITCH:n=this.parseSwitchStatement(e);break;case o.Token.THROW:n=this.parseThrowStatement(e);break;case o.Token.TRY:n=this.parseTryStatement(e);break;case o.Token.TYPE:n=this.parseTypeDeclaration(e,a.CommonFlags.NONE,null,e.tokenPos);break;case o.Token.VOID:n=this.parseVoidStatement(e);break;case o.Token.WHILE:n=this.parseWhileStatement(e);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(o.Token.CLOSEBRACE);){var i=e.mark(),a=this.parseStatement(e,t);a?(e.discard(i),n.push(a)):(e.reset(i),this.skipStatement(e))}var s=p.Node.createBlockStatement(n,e.range(r,e.pos));return e.skip(o.Token.SEMICOLON),s},t.prototype.parseBreak=function(e){var t=null;e.peek(!0)!=o.Token.IDENTIFIER||e.nextTokenOnNewLine||(e.next(!0),t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()));var r=p.Node.createBreakStatement(t,e.range());return e.skip(o.Token.SEMICOLON),r},t.prototype.parseContinue=function(e){var t=null;e.peek(!0)!=o.Token.IDENTIFIER||e.nextTokenOnNewLine||(e.next(!0),t=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()));var r=p.Node.createContinueStatement(t,e.range());return e.skip(o.Token.SEMICOLON),r},t.prototype.parseDoStatement=function(e){var t=e.tokenPos,r=this.parseStatement(e);if(!r)return null;if(e.skip(o.Token.WHILE))if(e.skip(o.Token.OPENPAREN)){var n=this.parseExpression(e);if(!n)return null;if(e.skip(o.Token.CLOSEPAREN)){var i=p.Node.createDoStatement(r,n,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),i}this.error(s.DiagnosticCode._0_expected,e.range(),")")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");else this.error(s.DiagnosticCode._0_expected,e.range(),"while");return null},t.prototype.parseExpressionStatement=function(e){var t=this.parseExpression(e);if(!t)return null;var r=p.Node.createExpressionStatement(t);return e.skip(o.Token.SEMICOLON),r},t.prototype.parseForStatement=function(e){var t=e.tokenPos;if(e.skip(o.Token.OPENPAREN)){var r=null;if(e.skip(o.Token.CONST))r=this.parseVariable(e,a.CommonFlags.CONST,null,e.tokenPos);else if(e.skip(o.Token.LET))r=this.parseVariable(e,a.CommonFlags.LET,null,e.tokenPos);else if(e.skip(o.Token.VAR))r=this.parseVariable(e,a.CommonFlags.NONE,null,e.tokenPos);else if(!e.skip(o.Token.SEMICOLON)&&!(r=this.parseExpressionStatement(e)))return null;if(e.token==o.Token.SEMICOLON){var n=null;if(!e.skip(o.Token.SEMICOLON)&&!(n=this.parseExpressionStatement(e)))return null;if(e.token==o.Token.SEMICOLON){var i=null;if(!e.skip(o.Token.CLOSEPAREN)){if(!(i=this.parseExpression(e)))return null;if(!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),null}var c=this.parseStatement(e);return c?p.Node.createForStatement(r,n?n.expression:null,i,c,e.range(t,e.pos)):null}this.error(s.DiagnosticCode._0_expected,e.range(),";")}else this.error(s.DiagnosticCode._0_expected,e.range(),";")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseIfStatement=function(e){var t=e.tokenPos;if(e.skip(o.Token.OPENPAREN)){var r=this.parseExpression(e);if(!r)return null;if(e.skip(o.Token.CLOSEPAREN)){var n=this.parseStatement(e);if(!n)return null;var i=null;return e.skip(o.Token.ELSE)&&!(i=this.parseStatement(e))?null:p.Node.createIfStatement(r,n,i,e.range(t,e.pos))}this.error(s.DiagnosticCode._0_expected,e.range(),")")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseSwitchStatement=function(e){var t=e.tokenPos;if(e.skip(o.Token.OPENPAREN)){var r=this.parseExpression(e);if(!r)return null;if(e.skip(o.Token.CLOSEPAREN)){if(e.skip(o.Token.OPENBRACE)){for(var n=new Array;!e.skip(o.Token.CLOSEBRACE);){var i=this.parseSwitchCase(e);if(!i)return null;n.push(i)}var a=p.Node.createSwitchStatement(r,n,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),a}this.error(s.DiagnosticCode._0_expected,e.range(),"{")}else this.error(s.DiagnosticCode._0_expected,e.range(),")")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseSwitchCase=function(e){var t,r,n=e.tokenPos;if(e.skip(o.Token.CASE)){var i=this.parseExpression(e);if(!i)return null;if(e.skip(o.Token.COLON)){for(t=new Array;e.peek()!=o.Token.CASE&&e.nextToken!=o.Token.DEFAULT&&e.nextToken!=o.Token.CLOSEBRACE;){if(!(r=this.parseStatement(e)))return null;t.push(r)}return p.Node.createSwitchCase(i,t,e.range(n,e.pos))}this.error(s.DiagnosticCode._0_expected,e.range(),":")}else if(e.skip(o.Token.DEFAULT)){if(e.skip(o.Token.COLON)){for(t=new Array;e.peek()!=o.Token.CASE&&e.nextToken!=o.Token.DEFAULT&&e.nextToken!=o.Token.CLOSEBRACE;){if(!(r=this.parseStatement(e)))return null;t.push(r)}return p.Node.createSwitchCase(null,t,e.range(n,e.pos))}this.error(s.DiagnosticCode._0_expected,e.range(),":")}else this.error(s.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=p.Node.createThrowStatement(r,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),n},t.prototype.parseTryStatement=function(e){var t,r=e.tokenPos;if(e.skip(o.Token.OPENBRACE)){for(var n=new Array;!e.skip(o.Token.CLOSEBRACE);){if(!(t=this.parseStatement(e)))return null;n.push(t)}var i=null,a=null,c=null;if(e.skip(o.Token.CATCH)){if(!e.skip(o.Token.OPENPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),"("),null;if(!e.skip(o.Token.IDENTIFIER))return this.error(s.DiagnosticCode.Identifier_expected,e.range()),null;if(i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),null;if(!e.skip(o.Token.OPENBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null;for(a=[];!e.skip(o.Token.CLOSEBRACE);){if(!(t=this.parseStatement(e)))return null;a.push(t)}}if(e.skip(o.Token.FINALLY)){if(!e.skip(o.Token.OPENBRACE))return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null;for(c=[];!e.skip(o.Token.CLOSEBRACE);){if(!(t=this.parseStatement(e)))return null;c.push(t)}}if(!a&&!c)return this.error(s.DiagnosticCode._0_expected,e.range(),"catch"),null;var u=p.Node.createTryStatement(n,i,a,c,e.range(r,e.pos));return e.skip(o.Token.SEMICOLON),u}return this.error(s.DiagnosticCode._0_expected,e.range(),"{"),null},t.prototype.parseTypeDeclaration=function(e,t,r,n){if(e.skip(o.Token.IDENTIFIER)){var i=p.Node.createIdentifierExpression(e.readIdentifier(),e.range()),c=null;if(e.skip(o.Token.LESSTHAN)){if(!(c=this.parseTypeParameters(e)))return null;t|=a.CommonFlags.GENERIC}if(e.skip(o.Token.EQUALS)){var u=this.parseType(e);if(!u)return null;var l=p.Node.createTypeDeclaration(i,c,u,r,t,e.range(n,e.pos));return e.skip(o.Token.SEMICOLON),l}this.error(s.DiagnosticCode._0_expected,e.range(),"=")}else this.error(s.DiagnosticCode.Identifier_expected,e.range());return null},t.prototype.parseVoidStatement=function(e){var t=e.tokenPos,r=this.parseExpression(e,20);if(!r)return null;var n=p.Node.createVoidStatement(r,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),n},t.prototype.parseWhileStatement=function(e){var t=e.tokenPos;if(e.skip(o.Token.OPENPAREN)){var r=this.parseExpression(e);if(!r)return null;if(e.skip(o.Token.CLOSEPAREN)){var n=this.parseStatement(e);if(!n)return null;var i=p.Node.createWhileStatement(r,n,e.range(t,e.pos));return e.skip(o.Token.SEMICOLON),i}this.error(s.DiagnosticCode._0_expected,e.range(),")")}else this.error(s.DiagnosticCode._0_expected,e.range(),"(");return null},t.prototype.parseExpressionStart=function(e){var t=e.next(!0),r=e.tokenPos,n=null;if(t==o.Token.NULL)return p.Node.createNullExpression(e.range());if(t==o.Token.TRUE)return p.Node.createTrueExpression(e.range());if(t==o.Token.FALSE)return p.Node.createFalseExpression(e.range());var i=function(e){switch(e){case o.Token.DOT_DOT_DOT:return 1;case o.Token.YIELD:return 2;case o.Token.EXCLAMATION:case o.Token.TILDE:case o.Token.PLUS:case o.Token.MINUS:case o.Token.PLUS_PLUS:case o.Token.MINUS_MINUS:case o.Token.TYPEOF:case o.Token.VOID:case o.Token.DELETE:return 16;case o.Token.NEW:return 19;default:return-1}}(t);if(-1!=i){var a=void 0;return t==o.Token.NEW?(a=this.parseExpression(e,18))?a.kind==p.NodeKind.CALL?p.Node.createNewExpression(a.expression,a.typeArguments,a.arguments,e.range(r,e.pos)):(this.error(s.DiagnosticCode.Operation_not_supported,e.range()),null):null:(a=this.parseExpression(e,i))?(t!=o.Token.PLUS_PLUS&&t!=o.Token.MINUS_MINUS||a.kind!=p.NodeKind.IDENTIFIER&&a.kind!=p.NodeKind.ELEMENTACCESS&&a.kind!=p.NodeKind.PROPERTYACCESS&&this.error(s.DiagnosticCode.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access,a.range),p.Node.createUnaryPrefixExpression(t,a,e.range(r,e.pos))):null}switch(t){case o.Token.OPENPAREN:if(e.skip(o.Token.CLOSEPAREN))return this.parseFunctionExpressionCommon(e,p.Node.createEmptyIdentifierExpression(e.range(r)),[],!0);var c=e.mark(),u=!0;do{switch(e.next(!0)){case o.Token.DOT_DOT_DOT:return e.reset(c),this.parseFunctionExpression(e);case o.Token.IDENTIFIER:switch(e.readIdentifier(),e.next()){case o.Token.CLOSEPAREN:if(!e.skip(o.Token.EQUALS_GREATERTHAN)){u=!1;break}case o.Token.COLON:return e.reset(c),this.parseFunctionExpression(e);case o.Token.QUESTION:case o.Token.COMMA:break;default:u=!1}break;default:u=!1}}while(u);return e.reset(c),(n=this.parseExpression(e))?e.skip(o.Token.CLOSEPAREN)?p.Node.createParenthesizedExpression(n,e.range(r,e.pos)):(this.error(s.DiagnosticCode._0_expected,e.range(),")"),null):null;case o.Token.OPENBRACKET:var l=new Array;if(!e.skip(o.Token.CLOSEBRACKET)){do{if(e.peek()==o.Token.COMMA)n=null;else if(!(n=this.parseExpression(e,1)))return null;if(l.push(n),e.peek()==o.Token.CLOSEBRACKET)break}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEBRACKET))return this.error(s.DiagnosticCode._0_expected,e.range(),"]"),null}return p.Node.createArrayLiteralExpression(l,e.range(r,e.pos));case o.Token.LESSTHAN:var h=this.parseType(e);return h?e.skip(o.Token.GREATERTHAN)?(n=this.parseExpression(e,18))?p.Node.createAssertionExpression(p.AssertionKind.PREFIX,n,h,e.range(r,e.pos)):null:(this.error(s.DiagnosticCode._0_expected,e.range(),">"),null):null;case o.Token.IDENTIFIER:return p.Node.createIdentifierExpression(e.readIdentifier(),e.range(r,e.pos));case o.Token.THIS:return p.Node.createThisExpression(e.range(r,e.pos));case o.Token.CONSTRUCTOR:return p.Node.createConstructorExpression(e.range(r,e.pos));case o.Token.SUPER:return p.Node.createSuperExpression(e.range(r,e.pos));case o.Token.STRINGLITERAL:return p.Node.createStringLiteralExpression(e.readString(),e.range(r,e.pos));case o.Token.INTEGERLITERAL:return p.Node.createIntegerLiteralExpression(e.readInteger(),e.range(r,e.pos));case o.Token.FLOATLITERAL:return p.Node.createFloatLiteralExpression(e.readFloat(),e.range(r,e.pos));case o.Token.SLASH:var _=e.readRegexpPattern();return e.skip(o.Token.SLASH)?p.Node.createRegexpLiteralExpression(_,e.readRegexpFlags(),e.range(r,e.pos)):(this.error(s.DiagnosticCode._0_expected,e.range(),"/"),null);case o.Token.FUNCTION:return this.parseFunctionExpression(e);default:return this.error(s.DiagnosticCode.Expression_expected,e.range()),null}},t.prototype.tryParseTypeArgumentsBeforeArguments=function(e){var t=e.mark();if(!e.skip(o.Token.LESSTHAN))return null;var r=new Array;do{var n=this.parseType(e,!0,!0);if(!n)return e.reset(t),null;r.push(n)}while(e.skip(o.Token.COMMA));return e.skip(o.Token.GREATERTHAN)&&e.skip(o.Token.OPENPAREN)?r:(e.reset(t),null)},t.prototype.parseArguments=function(e){var t=new Array;if(!e.skip(o.Token.CLOSEPAREN)){do{var r=this.parseExpression(e,1);if(!r)return null;t.push(r)}while(e.skip(o.Token.COMMA));if(!e.skip(o.Token.CLOSEPAREN))return this.error(s.DiagnosticCode._0_expected,e.range(),")"),null}return t},t.prototype.parseExpression=function(e,t){void 0===t&&(t=0);var r=this.parseExpressionStart(e);if(!r)return null;for(var n,i,a=r.range.start;(n=this.tryParseTypeArgumentsBeforeArguments(e))||e.skip(o.Token.OPENPAREN);){var c=this.parseArguments(e);if(!c)return null;r=p.Node.createCallExpression(r,n,c,e.range(a,e.pos))}for(var u,l=null;(u=h(i=e.peek()))>=t;)switch(e.next(),i){case o.Token.AS:var d=this.parseType(e);if(!d)return null;r=p.Node.createAssertionExpression(p.AssertionKind.AS,r,d,e.range(a,e.pos));break;case o.Token.OPENBRACKET:if(!(l=this.parseExpression(e)))return null;if(!e.skip(o.Token.CLOSEBRACKET))return this.error(s.DiagnosticCode._0_expected,e.range(),"]"),null;r=p.Node.createElementAccessExpression(r,l,e.range(a,e.pos));break;case o.Token.PLUS_PLUS:case 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this.push("floor<f32>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.TruncF32:return this.push("trunc<f32>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.NearestF32:return this.push("nearest<i32>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.SqrtF32:return this.push("sqrt<f32>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.EqzI32:case n.UnaryOp.EqzI64:return this.push("!"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ClzI64:return this.push("clz<i64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.CtzI64:return this.push("ctz<i64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.PopcntI64:return this.push("popcnt<i64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.AbsF64:return this.push("abs<f64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.CeilF64:return this.push("ceil<f64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.FloorF64:return this.push("floor<f64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.TruncF64:return this.push("trunc<f64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.NearestF64:return this.push("nearest<f64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.SqrtF64:return this.push("sqrt<f64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.ExtendI32:return this.push("<i64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ExtendU32:return this.push("<i64><u64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.WrapI64:case n.UnaryOp.TruncF32ToI32:return this.push("<i32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF32ToI64:return this.push("<i64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF32ToU32:return this.push("<i32><u32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF32ToU64:return this.push("<i64><u64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF64ToI32:return this.push("<i32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF64ToI64:return this.push("<i64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF64ToU32:return this.push("<i32><u32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.TruncF64ToU64:return this.push("<i64><u64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ReinterpretF32:return this.push("reinterpret<f32,i32>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.ReinterpretF64:return this.push("reinterpret<f64,i64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.ConvertI32ToF32:return this.push("<f32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertI32ToF64:return this.push("<f64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertU32ToF32:return this.push("<f32><u32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertU32ToF64:return this.push("<f64><u32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertI64ToF32:return this.push("<f32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertI64ToF64:return this.push("<f64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertU64ToF32:return this.push("<f32><u64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ConvertU64ToF64:return this.push("<f64><u64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.PromoteF32:return this.push("<f64>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.DemoteF64:return this.push("<f32>"),void this.decompileExpression(_BinaryenUnaryGetValue(e));case n.UnaryOp.ReinterpretI32:return this.push("reinterpret<i32,f32>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")");case n.UnaryOp.ReinterpretI64:return this.push("reinterpret<i64,f64>("),this.decompileExpression(_BinaryenUnaryGetValue(e)),void this.push(")")}break;case n.ExpressionId.Binary:switch(_BinaryenBinaryGetOp(e)){case n.BinaryOp.AddI32:case n.BinaryOp.AddI64:case n.BinaryOp.AddF32:case n.BinaryOp.AddF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" + "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.SubI32:case n.BinaryOp.SubI64:case n.BinaryOp.SubF32:case n.BinaryOp.SubF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" - "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.MulI32:case n.BinaryOp.MulI64:case n.BinaryOp.MulF32:case n.BinaryOp.MulF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" * "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.DivI32:case n.BinaryOp.DivI64:case n.BinaryOp.DivF32:case n.BinaryOp.DivF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" / "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.DivU32:return this.push("<i32>(<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" / <u32>"),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.RemI32:case n.BinaryOp.RemI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" % "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.RemU32:return this.push("<i32>(<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" / <u32>"),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.AndI32:case n.BinaryOp.AndI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" & "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.OrI32:case n.BinaryOp.OrI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" | "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.XorI32:case n.BinaryOp.XorI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" ^ "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.ShlI32:case n.BinaryOp.ShlI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" << "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.ShrU32:case n.BinaryOp.ShrU64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >>> "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.ShrI32:case n.BinaryOp.ShrI64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >> "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.RotlI32:return this.push("rotl<i32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.RotrI32:return this.push("rotr<i32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.EqI32:case n.BinaryOp.EqI64:case n.BinaryOp.EqF32:case n.BinaryOp.EqF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" == "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.NeI32:case n.BinaryOp.NeI64:case n.BinaryOp.NeF32:case n.BinaryOp.NeF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" != "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LtI32:case n.BinaryOp.LtI64:case n.BinaryOp.LtF32:case n.BinaryOp.LtF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" < "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LtU32:return this.push("<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" < <u32>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LeI32:case n.BinaryOp.LeI64:case n.BinaryOp.LeF32:case n.BinaryOp.LeF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" <= "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LeU32:return this.push("<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" <= <u32>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GtI32:case n.BinaryOp.GtI64:case n.BinaryOp.GtF32:case n.BinaryOp.GtF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" > "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GtU32:return this.push("<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" > <u32>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GeI32:case n.BinaryOp.GeI64:case n.BinaryOp.GeF32:case n.BinaryOp.GeF64:return this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >= "),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GeU32:return this.push("<u32>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >= <u32>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.DivU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" / <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.RemU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" % <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.RotlI64:return this.push("rotl<i64>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.RotrI64:return this.push("rotr<i64>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.LtU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" < <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.LeU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" <= <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GtU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" > <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.GeU64:return this.push("<u64>"),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(" >= <u64>"),void this.decompileExpression(_BinaryenBinaryGetRight(e));case n.BinaryOp.CopysignF32:return this.push("copysign<f32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.MinF32:return this.push("min<f32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.MaxF32:return this.push("max<f32>("),this.decompileExpression(_BinaryenBinaryGetLeft(e)),this.push(", "),this.decompileExpression(_BinaryenBinaryGetRight(e)),void this.push(")");case n.BinaryOp.CopysignF64:return 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e.currentType==a.Type.f32?e.module.createF32(NaN):(e.currentType=a.Type.f64,e.module.createF64(NaN));case"Infinity":return e.currentType==a.Type.f32?e.module.createF32(1/0):(e.currentType=a.Type.f64,e.module.createF64(1/0));case"HEAP_BASE":return e.currentType=e.options.usizeType,e.module.createGetGlobal("HEAP_BASE",e.currentType.toNativeType())}return e.error(i.DiagnosticCode.Operation_not_supported,r.range),e.module.createUnreachable()},t.compileCall=function(e,t,r,p,l,h){var _,d,y,m,g,E,T,f,A=e.module;switch(t.internalName){case"isInteger":return e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable()):(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,T.is(4)&&!T.is(256)?A.createI32(1):A.createI32(0));case"isFloat":return e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable()):(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,T.is(8)?A.createI32(1):A.createI32(0));case"isReference":return e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable()):(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,T.is(256)?A.createI32(1):A.createI32(0));case"isString":if(e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable();if(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,N=T.classType){var I=e.program.elementsLookup.get("String");if(I){assert(I.kind==s.ElementKind.CLASS_PROTOTYPE);var v=I.resolve(null);if(!v)return A.createUnreachable();if(N.isAssignableTo(v))return A.createI32(1)}}return A.createI32(0);case"isArray":return e.currentType=a.Type.bool,r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable()):(e.compileExpressionRetainType(p[0],a.Type.i32,!1),T=e.currentType,e.currentType=a.Type.bool,null!=(N=T.classType)&&null!=N.prototype.fnIndexedGet?A.createI32(1):A.createI32(0));var N;case"isNaN":if(e.currentType=a.Type.bool,1!=p.length)return r&&1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable();if(r){if(1!=r.length)return e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 11:g=e.currentFunction.getAndFreeTempLocal(a.Type.f32),m=A.createBinary(o.BinaryOp.NeF32,A.createTeeLocal(g.index,_),A.createGetLocal(g.index,o.NativeType.F32));break;case 12:g=e.currentFunction.getAndFreeTempLocal(a.Type.f64),m=A.createBinary(o.BinaryOp.NeF64,A.createTeeLocal(g.index,_),A.createGetLocal(g.index,o.NativeType.F64));break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break;default:m=A.createI32(0)}return e.currentType=a.Type.bool,m;case"isFinite":if(e.currentType=a.Type.bool,1!=p.length)return r&&1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.createUnreachable();if(r){if(1!=r.length)return e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 11:g=e.currentFunction.getAndFreeTempLocal(a.Type.f32),m=A.createSelect(A.createBinary(o.BinaryOp.NeF32,A.createUnary(o.UnaryOp.AbsF32,A.createTeeLocal(g.index,_)),A.createF32(1/0)),A.createI32(0),A.createBinary(o.BinaryOp.EqF32,A.createGetLocal(g.index,o.NativeType.F32),A.createGetLocal(g.index,o.NativeType.F32)));break;case 12:g=e.currentFunction.getAndFreeTempLocal(a.Type.f64),m=A.createSelect(A.createBinary(o.BinaryOp.NeF64,A.createUnary(o.UnaryOp.AbsF64,A.createTeeLocal(g.index,_)),A.createF64(1/0)),A.createI32(0),A.createBinary(o.BinaryOp.EqF64,A.createGetLocal(g.index,o.NativeType.F64),A.createGetLocal(g.index,o.NativeType.F64)));break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break;default:m=A.createI32(1)}return e.currentType=a.Type.bool,m;case"clz":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(e.currentType.kind){default:m=A.createUnary(o.UnaryOp.ClzI32,_);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createUnary(e.options.isWasm64?o.UnaryOp.ClzI64:o.UnaryOp.ClzI32,_);break;case 3:case 8:m=A.createUnary(o.UnaryOp.ClzI64,_);break;case 11:case 12:case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"ctz":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(e.currentType.kind){default:m=A.createUnary(o.UnaryOp.CtzI32,_);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createUnary(e.options.isWasm64?o.UnaryOp.CtzI64:o.UnaryOp.CtzI32,_);break;case 3:case 8:m=A.createUnary(o.UnaryOp.CtzI64,_);break;case 11:case 12:case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"popcnt":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(e.currentType.kind){default:m=A.createUnary(o.UnaryOp.PopcntI32,_);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createUnary(e.options.isWasm64?o.UnaryOp.PopcntI64:o.UnaryOp.PopcntI32,_);break;case 3:case 8:m=A.createUnary(o.UnaryOp.PopcntI64,_);break;case 11:case 12:case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"rotl":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 0:case 1:case 5:case 6:case 10:m=n.makeSmallIntegerWrap(A.createBinary(o.BinaryOp.RotlI32,_,d),e.currentType,A);case 2:case 7:m=A.createBinary(o.BinaryOp.RotlI32,_,d);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createBinary(e.options.isWasm64?o.BinaryOp.RotlI64:o.BinaryOp.RotlI32,_,d);break;case 3:case 8:m=A.createBinary(o.BinaryOp.RotlI64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"rotr":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 0:case 1:case 5:case 6:case 10:m=n.makeSmallIntegerWrap(A.createBinary(o.BinaryOp.RotrI32,_,d),e.currentType,A);break;case 2:case 7:m=A.createBinary(o.BinaryOp.RotrI32,_,d);break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 4:m=A.createBinary(e.options.isWasm64?o.BinaryOp.RotrI64:o.BinaryOp.RotrI32,_,d);break;case 3:case 8:m=A.createBinary(o.BinaryOp.RotrI64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"abs":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 0:case 1:case 2:g=e.currentFunction.getAndFreeTempLocal(a.Type.i32),m=A.createSelect(A.createTeeLocal(g.index,_),A.createBinary(o.BinaryOp.SubI32,A.createI32(0),A.createGetLocal(g.index,o.NativeType.I32)),A.createBinary(o.BinaryOp.GtI32,A.createGetLocal(g.index,o.NativeType.I32),A.createI32(0)));break;case 4:g=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),m=A.createSelect(A.createTeeLocal(g.index,_),A.createBinary(e.options.isWasm64?o.BinaryOp.SubI64:o.BinaryOp.SubI32,e.options.usizeType.toNativeZero(A),A.createGetLocal(g.index,e.options.nativeSizeType)),A.createBinary(e.options.isWasm64?o.BinaryOp.GtI64:o.BinaryOp.GtI32,A.createGetLocal(g.index,e.options.nativeSizeType),e.options.usizeType.toNativeZero(A)));break;case 3:g=e.currentFunction.getAndFreeTempLocal(a.Type.i64),m=A.createSelect(A.createTeeLocal(g.index,_),A.createBinary(o.BinaryOp.SubI64,A.createI64(0,0),A.createGetLocal(g.index,o.NativeType.I64)),A.createBinary(o.BinaryOp.GtI64,A.createGetLocal(g.index,o.NativeType.I64),A.createI64(0,0)));break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}case 5:case 6:case 7:case 8:case 10:m=_;break;case 11:m=A.createUnary(o.UnaryOp.AbsF32,_);break;case 12:m=A.createUnary(o.UnaryOp.AbsF64,_);break;case 13:m=A.createUnreachable();break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"max":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 0:case 1:case 2:g=e.currentFunction.getTempLocal(a.Type.i32),E=e.currentFunction.getAndFreeTempLocal(a.Type.i32),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.GtI32,A.createGetLocal(g.index,o.NativeType.I32),A.createGetLocal(E.index,o.NativeType.I32)));break;case 5:case 6:case 7:case 10:g=e.currentFunction.getTempLocal(a.Type.i32),E=e.currentFunction.getAndFreeTempLocal(a.Type.i32),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.GtU32,A.createGetLocal(g.index,o.NativeType.I32),A.createGetLocal(E.index,o.NativeType.I32)));break;case 3:g=e.currentFunction.getTempLocal(a.Type.i64),E=e.currentFunction.getAndFreeTempLocal(a.Type.i64),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.GtI64,A.createGetLocal(g.index,o.NativeType.I64),A.createGetLocal(E.index,o.NativeType.I64)));break;case 8:g=e.currentFunction.getTempLocal(a.Type.i64),E=e.currentFunction.getAndFreeTempLocal(a.Type.i64),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.GtU64,A.createGetLocal(g.index,o.NativeType.I64),A.createGetLocal(E.index,o.NativeType.I64)));break;case 4:g=e.currentFunction.getTempLocal(e.options.usizeType),E=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(e.options.isWasm64?o.BinaryOp.GtI64:o.BinaryOp.GtI32,A.createGetLocal(g.index,e.options.nativeSizeType),A.createGetLocal(E.index,e.options.nativeSizeType)));break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}g=e.currentFunction.getTempLocal(e.options.usizeType),E=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(e.options.isWasm64?o.BinaryOp.GtU64:o.BinaryOp.GtU32,A.createGetLocal(g.index,e.options.nativeSizeType),A.createGetLocal(E.index,e.options.nativeSizeType)));break;case 11:m=A.createBinary(o.BinaryOp.MaxF32,_,d);break;case 12:m=A.createBinary(o.BinaryOp.MaxF64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"min":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 0:case 1:case 2:g=e.currentFunction.getTempLocal(a.Type.i32),E=e.currentFunction.getAndFreeTempLocal(a.Type.i32),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.LtI32,A.createGetLocal(g.index,o.NativeType.I32),A.createGetLocal(E.index,o.NativeType.I32)));break;case 5:case 6:case 7:case 10:g=e.currentFunction.getTempLocal(a.Type.i32),E=e.currentFunction.getAndFreeTempLocal(a.Type.i32),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.LtU32,A.createGetLocal(g.index,o.NativeType.I32),A.createGetLocal(E.index,o.NativeType.I32)));break;case 3:g=e.currentFunction.getTempLocal(a.Type.i64),E=e.currentFunction.getAndFreeTempLocal(a.Type.i64),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.LtI64,A.createGetLocal(g.index,o.NativeType.I64),A.createGetLocal(E.index,o.NativeType.I64)));break;case 8:g=e.currentFunction.getTempLocal(a.Type.i64),E=e.currentFunction.getAndFreeTempLocal(a.Type.i64),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(o.BinaryOp.LtU64,A.createGetLocal(g.index,o.NativeType.I64),A.createGetLocal(E.index,o.NativeType.I64)));break;case 4:g=e.currentFunction.getTempLocal(e.options.usizeType),E=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(e.options.isWasm64?o.BinaryOp.LtI64:o.BinaryOp.LtI32,A.createGetLocal(g.index,e.options.nativeSizeType),A.createGetLocal(E.index,e.options.nativeSizeType)));break;case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}g=e.currentFunction.getTempLocal(e.options.usizeType),E=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),e.currentFunction.freeTempLocal(g),m=A.createSelect(A.createTeeLocal(g.index,_),A.createTeeLocal(E.index,d),A.createBinary(e.options.isWasm64?o.BinaryOp.LtU64:o.BinaryOp.LtU32,A.createGetLocal(g.index,e.options.nativeSizeType),A.createGetLocal(E.index,e.options.nativeSizeType)));break;case 11:m=A.createBinary(o.BinaryOp.MinF32,_,d);break;case 12:m=A.createBinary(o.BinaryOp.MinF64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"ceil":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}default:m=_;break;case 11:m=A.createUnary(o.UnaryOp.CeilF32,_);break;case 12:m=A.createUnary(o.UnaryOp.CeilF64,_);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"floor":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}default:m=_;break;case 11:m=A.createUnary(o.UnaryOp.FloorF32,_);break;case 12:m=A.createUnary(o.UnaryOp.FloorF64,_);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"copysign":if(2!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(d=e.compileExpression(p[1],e.currentType),e.currentType.kind){case 11:m=A.createBinary(o.BinaryOp.CopysignF32,_,d);break;case 12:m=A.createBinary(o.BinaryOp.CopysignF64,_,d);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"nearest":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}default:m=_;break;case 11:m=A.createUnary(o.UnaryOp.NearestF32,_);break;case 12:m=A.createUnary(o.UnaryOp.NearestF64,_);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"reinterpret":if(1!=p.length)return r&&1==r.length||(r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0")),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r?r.length.toString(10):"0"),A.createUnreachable();switch(r[0].kind){case 2:case 7:_=e.compileExpression(p[0],a.Type.f32),m=A.createUnary(o.UnaryOp.ReinterpretF32,_);break;case 3:case 8:_=e.compileExpression(p[0],a.Type.f64),m=A.createUnary(o.UnaryOp.ReinterpretF64,_);break;case 9:if(r[0].isReference)return e.error(i.DiagnosticCode.Operation_not_supported,h.range),e.currentType=r[0],A.createUnreachable();case 4:_=e.compileExpression(p[0],e.options.isWasm64?a.Type.f64:a.Type.f32),m=A.createUnary(e.options.isWasm64?o.UnaryOp.ReinterpretF64:o.UnaryOp.ReinterpretF32,_);break;case 11:_=e.compileExpression(p[0],a.Type.u32),m=A.createUnary(o.UnaryOp.ReinterpretI32,_);break;case 12:_=e.compileExpression(p[0],a.Type.u64),m=A.createUnary(o.UnaryOp.ReinterpretI64,_);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return e.currentType=r[0],m;case"sqrt":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 11:m=A.createUnary(o.UnaryOp.SqrtF32,_);break;case 12:m=A.createUnary(o.UnaryOp.SqrtF64,_);break;default:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"trunc":if(1!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.f64,0);switch(e.currentType.kind){case 9:if(e.currentType.isReference){e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable();break}default:m=_;break;case 11:m=A.createUnary(o.UnaryOp.TruncF32,_);break;case 12:m=A.createUnary(o.UnaryOp.TruncF64,_);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"load":return p.length<1||p.length>2?(r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),p.length<1?e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,h.range,"1",p.length.toString(10)):e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.createUnreachable()):r&&1==r.length?(_=e.compileExpression(p[0],e.options.usizeType),(f=2==p.length?c(e,p[1]):0)<0?A.createUnreachable():(e.currentType=r[0],A.createLoad(r[0].byteSize,r[0].is(5),_,r[0].is(4)&&l.is(4)&&l.size>r[0].size?(e.currentType=l).toNativeType():(e.currentType=r[0]).toNativeType(),f))):(r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),A.createUnreachable());case"store":return e.currentType=a.Type.void,p.length<2||p.length>3?(r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),p.length<2?e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,h.range,"2",p.length.toString(10)):e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"3",p.length.toString(10)),A.createUnreachable()):r&&1==r.length?(_=e.compileExpression(p[0],e.options.usizeType),d=e.compileExpression(p[1],r[0],r[0].is(4)?0:1),e.currentType.is(4)&&r[0].is(4)&&r[0].size>e.currentType.size?(d=e.convertExpression(d,e.currentType,r[0],1,p[1]),T=r[0]):T=e.currentType,(f=3==p.length?c(e,p[2]):0)<0?A.createUnreachable():(e.currentType=a.Type.void,A.createStore(r[0].byteSize,_,d,T.toNativeType(),f))):(e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),A.createUnreachable());case"sizeof":return e.currentType=e.options.usizeType,0!=p.length?(r&&1==r.length||e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"0",p.length.toString(10)),A.createUnreachable()):r?1!=r.length?(e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10)),A.createUnreachable()):m=e.options.isWasm64?A.createI64(r[0].byteSize,0):A.createI32(r[0].byteSize):(e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1","0"),A.createUnreachable());case"select":if(3!=p.length)return r&&(r.length&&(e.currentType=r[0]),1!=r.length&&e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r.length.toString(10))),e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"3",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpression(p[0],a.Type.i32,0);switch(d=e.compileExpression(p[1],T=e.currentType),y=e.compileExpression(p[2],a.Type.bool),e.currentType=T,e.currentType.kind){default:m=A.createSelect(_,d,y);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=A.createUnreachable()}return m;case"unreachable":return 0!=p.length&&e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"0",p.length.toString(10)),r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),A.createUnreachable();case"current_memory":return e.currentType=a.Type.i32,0!=p.length&&e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"0",p.length.toString(10)),r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),A.createHost(o.HostOp.CurrentMemory);case"grow_memory":return e.currentType=a.Type.i32,1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"0",p.length.toString(10)),_=A.createUnreachable()):_=e.compileExpression(p[0],a.Type.i32),r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),A.createHost(o.HostOp.GrowMemory,null,[_]);case"move_memory":if(r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),3!=p.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"3",p.length.toString(10)),e.currentType=a.Type.void,A.createUnreachable();throw _=e.compileExpression(p[0],e.options.usizeType),d=e.compileExpression(p[1],e.options.usizeType),y=e.compileExpression(p[2],e.options.usizeType),e.currentType=a.Type.void,new Error("not implemented");case"set_memory":if(r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),3!=p.length)return e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"3",p.length.toString(10)),e.currentType=a.Type.void,A.createUnreachable();throw _=e.compileExpression(p[0],e.options.usizeType),d=e.compileExpression(p[1],a.Type.u32),y=e.compileExpression(p[2],e.options.usizeType),e.currentType=a.Type.void,new Error("not implemented");case"changetype":return r&&1==r.length?9!=r[0].kind?(e.error(i.DiagnosticCode.Operation_not_supported,h.range),e.currentType=r[0],A.createUnreachable()):1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=r[0],A.createUnreachable()):(_=e.compileExpression(p[0],e.options.usizeType,0),e.currentType=r[0],9!=e.currentType.kind?(e.error(i.DiagnosticCode.Operation_not_supported,h.range),A.createUnreachable()):_):(r&&r.length&&(e.currentType=r[0]),e.error(i.DiagnosticCode.Expected_0_type_arguments_but_got_1,h.range,"1",r?r.length.toString(10):"0"),A.createUnreachable());case"assert":if(p.length<1||p.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,h.range,"1",r.length.toString(10))),p.length<1?e.error(i.DiagnosticCode.Expected_at_least_0_arguments_but_got_1,h.range,"1",p.length.toString(10)):p.length>2&&e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"2",p.length.toString(10)),A.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,h.range,"1",r.length.toString(10)),A.createUnreachable();_=e.compileExpression(p[0],r[0])}else _=e.compileExpressionRetainType(p[0],a.Type.i32);if(T=e.currentType,e.currentType=T.nonNullableType,e.options.noAssert)return l==a.Type.void?(e.currentType=a.Type.void,A.createNop()):_;var C=u(e,2==p.length?p[1]:null,h);if(e.currentType=T.nonNullableType,l==a.Type.void){switch(e.currentType.kind){default:m=A.createIf(A.createUnary(o.UnaryOp.EqzI32,_),C);break;case 3:case 8:m=A.createIf(A.createUnary(o.UnaryOp.EqzI64,_),C);break;case 4:case 9:m=A.createIf(A.createUnary(e.options.isWasm64?o.UnaryOp.EqzI64:o.UnaryOp.EqzI32,_),C);break;case 11:m=A.createIf(A.createBinary(o.BinaryOp.EqF32,_,A.createF32(0)),C);break;case 12:m=A.createIf(A.createBinary(o.BinaryOp.EqF64,_,A.createF64(0)),C);break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=C}e.currentType=a.Type.void}else switch(e.currentType.kind){default:g=e.currentFunction.getAndFreeTempLocal(a.Type.i32),m=A.createIf(A.createUnary(o.UnaryOp.EqzI32,A.createTeeLocal(g.index,_)),C,A.createGetLocal(g.index,o.NativeType.I32));break;case 3:case 8:g=e.currentFunction.getAndFreeTempLocal(a.Type.i64),m=A.createIf(A.createUnary(o.UnaryOp.EqzI64,A.createTeeLocal(g.index,_)),C,A.createGetLocal(g.index,o.NativeType.I64));break;case 4:case 9:g=e.currentFunction.getAndFreeTempLocal(e.options.usizeType),m=A.createIf(A.createUnary(e.options.isWasm64?o.UnaryOp.EqzI64:o.UnaryOp.EqzI32,A.createTeeLocal(g.index,_)),C,A.createGetLocal(g.index,e.options.nativeSizeType));break;case 11:g=e.currentFunction.getAndFreeTempLocal(a.Type.f32),m=A.createIf(A.createBinary(o.BinaryOp.EqF32,A.createTeeLocal(g.index,_),A.createF32(0)),C,A.createGetLocal(g.index,o.NativeType.F32));break;case 12:g=e.currentFunction.getAndFreeTempLocal(a.Type.f64),m=A.createIf(A.createBinary(o.BinaryOp.EqF64,A.createTeeLocal(g.index,_),A.createF64(0)),C,A.createGetLocal(g.index,o.NativeType.F64));break;case 13:e.error(i.DiagnosticCode.Operation_not_supported,h.range),m=C}return m;case"i8":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.i8,A.createUnreachable()):e.compileExpression(p[0],a.Type.i8,2);case"i16":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.i16,A.createUnreachable()):e.compileExpression(p[0],a.Type.i16,2);case"i32":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.i32,A.createUnreachable()):e.compileExpression(p[0],a.Type.i32,2);case"i64":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.i64,A.createUnreachable()):e.compileExpression(p[0],a.Type.i64,2);case"isize":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=e.options.isWasm64?a.Type.isize64:a.Type.isize32,A.createUnreachable()):e.compileExpression(p[0],e.options.isWasm64?a.Type.isize64:a.Type.isize32,2);case"u8":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.u8,A.createUnreachable()):e.compileExpression(p[0],a.Type.u8,2);case"u16":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.u16,A.createUnreachable()):e.compileExpression(p[0],a.Type.u16,2);case"u32":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.u32,A.createUnreachable()):e.compileExpression(p[0],a.Type.u32,2);case"u64":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.u64,A.createUnreachable()):e.compileExpression(p[0],a.Type.u64,2);case"usize":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=e.options.usizeType,A.createUnreachable()):e.compileExpression(p[0],e.options.usizeType,2);case"bool":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.bool,A.createUnreachable()):e.compileExpression(p[0],a.Type.bool,2);case"f32":return r&&e.error(i.DiagnosticCode.Type_0_is_not_generic,h.range,t.internalName),1!=p.length?(e.error(i.DiagnosticCode.Expected_0_arguments_but_got_1,h.range,"1",p.length.toString(10)),e.currentType=a.Type.f32,A.createUnreachable()):e.compileExpression(p[0],a.Type.f32,2);case"f64":return 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webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory(require(\"binaryen\"));\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine([\"binaryen\"], factory);\n\telse if(typeof exports === 'object')\n\t\texports[\"assemblyscript\"] = factory(require(\"binaryen\"));\n\telse\n\t\troot[\"assemblyscript\"] = factory(root[\"binaryen\"]);\n})(typeof self !== 'undefined' ? self : this, function(__WEBPACK_EXTERNAL_MODULE__22__) {\nreturn "," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__webpack_require__.r = function(exports) {\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 27);\n","/**\r\n * AssemblyScript's intermediate representation describing a program's elements.\r\n * @module program\r\n *//***/\r\n\r\nimport {\r\n  Options\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  Signature,\r\n\r\n  typesToString\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  TypeNode,\r\n  TypeParameterNode,\r\n  // ParameterNode,\r\n  // ParameterKind,\r\n  // SignatureNode,\r\n  DecoratorNode,\r\n  DecoratorKind,\r\n\r\n  Expression,\r\n  AssertionExpression,\r\n  ElementAccessExpression,\r\n  IdentifierExpression,\r\n  LiteralExpression,\r\n  LiteralKind,\r\n  ParenthesizedExpression,\r\n  PropertyAccessExpression,\r\n  StringLiteralExpression,\r\n  CallExpression,\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  VariableLikeDeclarationStatement,\r\n  VariableStatement,\r\n\r\n  ParameterKind,\r\n  SignatureNode\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Module,\r\n  NativeType,\r\n  FunctionRef,\r\n} from \"./module\";\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/** 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\r\n/** Represents a yet unresolved export. */\r\nclass QueuedExport {\r\n  isReExport: bool;\r\n  referencedName: string;\r\n  member: ExportMember;\r\n}\r\n\r\n/** Represents a yet unresolved import. */\r\nclass QueuedImport {\r\n  internalName: string;\r\n  referencedName: string;\r\n  referencedNameAlt: string;\r\n  declaration: ImportDeclaration;\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\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  /** Diagnostic offset used where repeatedly obtaining the next diagnostic. */\r\n  diagnosticsOffset: i32 = 0;\r\n  /** Compiler options. */\r\n  options: Options;\r\n  /** Elements by internal name. */\r\n  elementsLookup: 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,Element> = new Map();\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.sources = [];\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    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    var queuedExports = new Map<string,QueuedExport>();\r\n    var queuedImports = new Array<QueuedImport>();\r\n    var queuedDerivedClasses = 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      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, queuedDerivedClasses);\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, queuedDerivedClasses);\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 element = this.tryResolveImport(queuedImport.referencedName, queuedExports);\r\n      if (element) {\r\n        this.elementsLookup.set(queuedImport.internalName, element);\r\n        queuedImports.splice(i, 1);\r\n      } else {\r\n        if (element = this.tryResolveImport(queuedImport.referencedNameAlt, queuedExports)) {\r\n          this.elementsLookup.set(queuedImport.internalName, 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            queuedImport.declaration.range,\r\n            (<ImportStatement>queuedImport.declaration.parent).path.value,\r\n            queuedImport.declaration.externalName.text\r\n          );\r\n          ++i;\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.referencedName)) {\r\n            this.setExportAndCheckLibrary(\r\n              exportName,\r\n              element,\r\n              currentExport.member.externalName\r\n            );\r\n            break;\r\n          }\r\n          currentExport = queuedExports.get(currentExport.referencedName);\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.referencedName)) ||\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              currentExport.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    for (let i = 0, k = queuedDerivedClasses.length; i < k; ++i) {\r\n      let derivedDeclaration = queuedDerivedClasses[i].declaration;\r\n      let derivedType = assert(derivedDeclaration.extendsType);\r\n      let resolved = this.resolveIdentifier(derivedType.name, null);\r\n      if (resolved) {\r\n        if (resolved.element.kind != ElementKind.CLASS_PROTOTYPE) {\r\n          this.error(\r\n            DiagnosticCode.A_class_may_only_extend_another_class,\r\n            derivedType.range\r\n          );\r\n          continue;\r\n        }\r\n        queuedDerivedClasses[i].basePrototype = (\r\n          <ClassPrototype>resolved.element\r\n        );\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Tries to resolve an import by traversing exports and queued exports. */\r\n  private tryResolveImport(\r\n    referencedName: string,\r\n    queuedExports: 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(referencedName)) return element;\r\n      let queuedExport = queuedExports.get(referencedName);\r\n      if (!queuedExport) return null;\r\n      if (queuedExport.isReExport) {\r\n        referencedName = queuedExport.referencedName;\r\n        continue;\r\n      }\r\n      return this.elementsLookup.get(queuedExport.referencedName);\r\n    } while (true);\r\n  }\r\n\r\n  /** Processes internal decorators, if present. */\r\n  private checkInternalDecorators(\r\n    element: Element,\r\n    declaration: DeclarationStatement\r\n  ): void {\r\n    var parentNode = declaration.parent;\r\n    if (\r\n      element.is(CommonFlags.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 simpleName = declaration.name.text;\r\n      if (this.elementsLookup.has(simpleName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, element.internalName\r\n        );\r\n      } else {\r\n        element.set(CommonFlags.GLOBAL);\r\n        this.elementsLookup.set(simpleName, element);\r\n        if (element.is(CommonFlags.BUILTIN)) {\r\n          element.internalName = simpleName;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  private initializeClass(\r\n    declaration: ClassDeclaration,\r\n    queuedDerivedClasses: 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    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    );\r\n    prototype.namespace = namespace;\r\n    this.elementsLookup.set(internalName, prototype);\r\n\r\n    var implementsTypes = declaration.implementsTypes;\r\n    var numImplementsTypes = implementsTypes.length;\r\n    if (prototype.is(CommonFlags.UNMANAGED)) {\r\n      if (implementsTypes && numImplementsTypes) {\r\n        this.error(\r\n          DiagnosticCode.Structs_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    } else if (numImplementsTypes) {\r\n      for (let i = 0; i < numImplementsTypes; ++i) {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          implementsTypes[i].range\r\n        );\r\n      }\r\n    }\r\n\r\n    // remember classes that extend another one\r\n    if (declaration.extendsType) {\r\n      queuedDerivedClasses.push(prototype);\r\n    }\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)) {\r\n        if (prototype.is(CommonFlags.EXPORT)) {\r\n          prototype.set(CommonFlags.MODULE_EXPORT);\r\n        }\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      if (prototype.is(CommonFlags.EXPORT) && declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, prototype);\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          throw new Error(\"class member expected\");\r\n        }\r\n      }\r\n    }\r\n\r\n    this.checkInternalDecorators(prototype, declaration);\r\n\r\n    // check and possibly register string type\r\n    if (\r\n      prototype.is(CommonFlags.GLOBAL) &&\r\n      declaration.name.text == \"String\"\r\n    ) {\r\n      if (!this.typesLookup.has(\"string\")) {\r\n        let instance = prototype.resolve(null);\r\n        if (instance) this.typesLookup.set(\"string\", instance.type);\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, declaration.programLevelInternalName\r\n        );\r\n      }\r\n    }\r\n  }\r\n\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\r\n    // static fields become global variables\r\n    if (declaration.is(CommonFlags.STATIC)) {\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        declaration,\r\n        Type.void\r\n      );\r\n      classPrototype.members.set(name, staticField);\r\n      this.elementsLookup.set(internalName, staticField);\r\n\r\n    // instance fields are remembered until resolved\r\n    } else {\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      classPrototype.instanceMembers.set(name, instanceField);\r\n    }\r\n  }\r\n\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    // 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      );\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      );\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.checkOperators(declaration.decorators, prototype, classPrototype);\r\n  }\r\n\r\n  private checkOperators(\r\n    decorators: DecoratorNode[] | null,\r\n    prototype: FunctionPrototype,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    // handle operator annotations. operators are either instance methods taking\r\n    // a second argument of the instance's type or static methods taking two\r\n    // arguments of the instance's type. return values vary depending on the\r\n    // operation.\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 == DecoratorKind.OPERATOR) {\r\n          if (!prototype) {\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              decorator.range\r\n            );\r\n            continue;\r\n          }\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              switch ((<StringLiteralExpression>firstArg).value) {\r\n                case \"[]\": {\r\n                  classPrototype.fnIndexedGet = prototype.simpleName;\r\n                  break;\r\n                }\r\n                case \"[]=\": {\r\n                  classPrototype.fnIndexedSet = prototype.simpleName;\r\n                  break;\r\n                }\r\n                case \"+\": {\r\n                  classPrototype.fnConcat = prototype.simpleName;\r\n                  break;\r\n                }\r\n                case \"==\": {\r\n                  classPrototype.fnEquals = prototype.simpleName;\r\n                  break;\r\n                }\r\n                default: {\r\n                  this.error(\r\n                    DiagnosticCode.Operation_not_supported,\r\n                    firstArg.range\r\n                  );\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        } else if (decorator.decoratorKind != DecoratorKind.CUSTOM) {\r\n          // methods support built-in @operator only\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            decorator.range\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 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      );\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      );\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      }\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.namespace = 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)) {\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      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        element.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, element);\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.checkInternalDecorators(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    var isModuleExport = enm.is(CommonFlags.MODULE_EXPORT);\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 (isModuleExport) {\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    for (let i = 0, k = members.length; i < k; ++i) {\r\n      this.initializeExport(members[i], statement.internalPath, queuedExports);\r\n    }\r\n  }\r\n\r\n  private setExportAndCheckLibrary(\r\n    name: string,\r\n    element: Element,\r\n    identifier: IdentifierExpression\r\n  ): void {\r\n    this.fileLevelExports.set(name, element);\r\n    if (identifier.range.source.isLibrary) { // add global alias\r\n      if (this.elementsLookup.has(identifier.text)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          identifier.range, identifier.text\r\n        );\r\n      } else {\r\n        element.internalName = identifier.text;\r\n        this.elementsLookup.set(identifier.text, element);\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 (referencedElement = this.elementsLookup.get(referencedName)) {\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      // 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.referencedName = referencedName; // -> internal 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.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          referencedName = queuedExport.referencedName;\r\n          if (seen.has(queuedExport)) break;\r\n          seen.add(queuedExport);\r\n        } else {\r\n          referencedElement = this.elementsLookup.get(queuedExport.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          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.referencedName = referencedName; // -> export 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 prototype = new FunctionPrototype(\r\n      this,\r\n      simpleName,\r\n      internalName,\r\n      declaration,\r\n      null\r\n    );\r\n    prototype.namespace = 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.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      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, prototype);\r\n      }\r\n    }\r\n\r\n    this.checkInternalDecorators(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) {\r\n      let internalName = (\r\n        statement.range.source.internalPath +\r\n        PATH_DELIMITER +\r\n        statement.namespaceName.text\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      this.error( // TODO\r\n        DiagnosticCode.Operation_not_supported,\r\n        statement.range\r\n      );\r\n    }\r\n  }\r\n\r\n  private initializeImport(\r\n    declaration: ImportDeclaration,\r\n    internalPath: string,\r\n    queuedExports: Map<string,QueuedExport>,\r\n    queuedImports: QueuedImport[]\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 referencedName = 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(referencedName)) {\r\n      this.elementsLookup.set(internalName, element);\r\n      return;\r\n    }\r\n\r\n    // otherwise queue it\r\n    var indexPart = PATH_DELIMITER + \"index\";\r\n    var queuedImport = new QueuedImport();\r\n    queuedImport.internalName = internalName;\r\n    if (internalPath.endsWith(indexPart)) {\r\n      queuedImport.referencedName = referencedName; // try exact first\r\n      queuedImport.referencedNameAlt = (\r\n        internalPath.substring(0, internalPath.length - indexPart.length + 1) +\r\n        declaration.externalName.text\r\n      );\r\n    } else {\r\n      queuedImport.referencedName = referencedName; // try exact first\r\n      queuedImport.referencedNameAlt = (\r\n        internalPath +\r\n        indexPart +\r\n        PATH_DELIMITER +\r\n        declaration.externalName.text\r\n      );\r\n    }\r\n    queuedImport.declaration = declaration;\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    var prototype = new InterfacePrototype(this, declaration.name.text, internalName, declaration);\r\n    prototype.namespace = 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      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, prototype);\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.checkInternalDecorators(prototype, declaration);\r\n  }\r\n\r\n  private initializeNamespace(\r\n    declaration: NamespaceDeclaration,\r\n    queuedExtendingClasses: 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.namespace = parentNamespace;\r\n      this.elementsLookup.set(internalName, namespace);\r\n      this.checkInternalDecorators(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      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        namespace.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, namespace);\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], queuedExtendingClasses, 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], queuedExtendingClasses, 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 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        declaration,\r\n        Type.void // resolved later on\r\n      );\r\n      global.namespace = namespace;\r\n      this.elementsLookup.set(internalName, global);\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        if (declaration.range.source.isEntry) {\r\n          if (this.moduleLevelExports.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          global.set(CommonFlags.MODULE_EXPORT);\r\n          this.moduleLevelExports.set(internalName, global);\r\n        }\r\n      }\r\n      this.checkInternalDecorators(global, declaration);\r\n    }\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    reportNotFound: bool = true\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(\r\n        explicitThisType,\r\n        contextualTypeArguments,\r\n        reportNotFound\r\n      );\r\n      if (!thisType) return null;\r\n    }\r\n    var parameterTypeNodes = node.parameterTypes;\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        reportNotFound\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(\r\n        returnTypeNode,\r\n        contextualTypeArguments,\r\n        reportNotFound\r\n      );\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 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    reportNotFound: bool = true\r\n  ): Type | null {\r\n    if (node.kind == NodeKind.SIGNATURE) {\r\n      let signature = this.resolveSignature(<SignatureNode>node, contextualTypeArguments, reportNotFound);\r\n      if (!signature) return null;\r\n      return Type.u32.asFunction(signature);\r\n    }\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;\r\n\r\n    var element: Element | null;\r\n\r\n    // check file-global / program-global element\r\n    if ((element = this.elementsLookup.get(localName)) || (element = this.elementsLookup.get(globalName))) {\r\n      switch (element.kind) {\r\n        case ElementKind.CLASS_PROTOTYPE: {\r\n          let instance = (<ClassPrototype>element).resolveUsingTypeArguments(\r\n            typeNode.typeArguments,\r\n            contextualTypeArguments,\r\n            null\r\n          ); // reports\r\n          return instance ? instance.type : null;\r\n        }\r\n      }\r\n    }\r\n\r\n    // check (global) type alias\r\n    var alias = this.typeAliases.get(simpleName);\r\n    if (alias) return this.resolveType(alias.type, contextualTypeArguments, reportNotFound);\r\n\r\n    // resolve parameters\r\n    if (typeNode.typeArguments) {\r\n      let k = typeNode.typeArguments.length;\r\n      let paramTypes = new Array<Type>(k);\r\n      for (let i = 0; i < k; ++i) {\r\n        let paramType = this.resolveType( // reports\r\n          typeNode.typeArguments[i],\r\n          contextualTypeArguments,\r\n          reportNotFound\r\n        );\r\n        if (!paramType) return null;\r\n        paramTypes[i] = paramType;\r\n      }\r\n\r\n      if (k) { // 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    var type: Type | null;\r\n\r\n    // check file-global / program-global type\r\n    if ((type = this.typesLookup.get(localName)) || (type = this.typesLookup.get(globalName))) {\r\n      return type;\r\n    }\r\n\r\n    if (reportNotFound) {\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 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  ): 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        true\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    contextualFunction: Function | null,\r\n    contextualEnum: Enum | null = null\r\n  ): ResolvedElement | null {\r\n    var name = identifier.text;\r\n\r\n    var element: Element | null;\r\n    var namespace: Element | null;\r\n\r\n    // check siblings\r\n    if (contextualEnum) {\r\n\r\n      if (\r\n        contextualEnum.members &&\r\n        (element = contextualEnum.members.get(name)) &&\r\n        element.kind == ElementKind.ENUMVALUE\r\n      ) {\r\n        if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n        return resolvedElement.set(element);\r\n      }\r\n\r\n    } else if (contextualFunction) {\r\n\r\n      // check locals\r\n      if (element = contextualFunction.flow.getScopedLocal(name)) {\r\n        if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n        return resolvedElement.set(element);\r\n      }\r\n\r\n      // search contextual parent namespaces if applicable\r\n      if (namespace = contextualFunction.prototype.namespace) {\r\n        do {\r\n          if (element = this.elementsLookup.get(namespace.internalName + STATIC_DELIMITER + name)) {\r\n            if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n            return resolvedElement.set(element);\r\n          }\r\n        } while (namespace = namespace.namespace);\r\n      }\r\n    }\r\n\r\n    // search current file\r\n    if (element = this.elementsLookup.get(identifier.range.source.internalPath + PATH_DELIMITER + name)) {\r\n      if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n      return resolvedElement.set(element);\r\n    }\r\n\r\n    // search global scope\r\n    if (element = this.elementsLookup.get(name)) {\r\n      if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n      return resolvedElement.set(element);\r\n    }\r\n\r\n    this.error(\r\n      DiagnosticCode.Cannot_find_name_0,\r\n      identifier.range, name\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  ): ResolvedElement | null {\r\n    // start by resolving the lhs target (expression before the last dot)\r\n    var targetExpression = propertyAccess.expression;\r\n    resolvedElement = this.resolveExpression( // reports\r\n      targetExpression,\r\n      contextualFunction\r\n    );\r\n    if (!resolvedElement) return null;\r\n    var target = resolvedElement.element;\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    var targetType: Type;\r\n    var member: Element | null;\r\n\r\n    // Resolve variable-likes to their class type first\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL:\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        if (!(targetType = (<VariableLikeElement>target).type).classType) {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.property.range, propertyName, targetType.toString()\r\n          );\r\n          return null;\r\n        }\r\n        target = <Class>targetType.classType;\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let getter = assert((<Property>target).getterPrototype).resolve(); // reports\r\n        if (!getter) return null;\r\n        if (!(targetType = getter.signature.returnType).classType) {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.property.range, propertyName, targetType.toString()\r\n          );\r\n          return null;\r\n        }\r\n        target = <Class>targetType.classType;\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          if (target.members && (member = target.members.get(propertyName))) {\r\n            return resolvedElement.set(member).withTarget(target, targetExpression);\r\n          }\r\n          // check inherited static members on the base prototype while 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          // or inherited instance members on the base class while 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        if (target.members && (member = target.members.get(propertyName))) {\r\n          return resolvedElement.set(member).withTarget(target, targetExpression);\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  ): ResolvedElement | null {\r\n    // start by resolving the lhs target (expression before the last dot)\r\n    var targetExpression = elementAccess.expression;\r\n    resolvedElement = this.resolveExpression(\r\n      targetExpression,\r\n      contextualFunction\r\n    );\r\n    if (!resolvedElement) return null;\r\n    var target = resolvedElement.element;\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 (type.classType) {\r\n          let indexedGetName = (target = type.classType).prototype.fnIndexedGet;\r\n          let indexedGet: Element | null;\r\n          if (\r\n            indexedGetName != null &&\r\n            target.members &&\r\n            (indexedGet = target.members.get(indexedGetName)) &&\r\n            indexedGet.kind == ElementKind.FUNCTION_PROTOTYPE\r\n          ) {\r\n            return resolvedElement.set(indexedGet).withTarget(type.classType, targetExpression);\r\n          }\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n      targetExpression.range, target.internalName\r\n    );\r\n    return null;\r\n  }\r\n\r\n  resolveExpression(\r\n    expression: Expression,\r\n    contextualFunction: Function\r\n  ): ResolvedElement | 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((<AssertionExpression>expression).toType); // reports\r\n        if (type) {\r\n          let classType = type.classType;\r\n          if (classType) {\r\n            if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n            return resolvedElement.set(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        let parent = contextualFunction.memberOf;\r\n        if (parent) {\r\n          if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n          return resolvedElement.set(parent);\r\n        }\r\n        this.error(\r\n          DiagnosticCode._this_cannot_be_referenced_in_current_location,\r\n          expression.range\r\n        );\r\n        return null;\r\n      }\r\n      case NodeKind.SUPER: { // -> Class\r\n        let parent = contextualFunction.memberOf;\r\n        if (parent && parent.kind == ElementKind.CLASS && (parent = (<Class>parent).base)) {\r\n          if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n          return resolvedElement.set(parent);\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        return null;\r\n      }\r\n      case NodeKind.IDENTIFIER: {\r\n        return this.resolveIdentifier(<IdentifierExpression>expression, contextualFunction);\r\n      }\r\n      case NodeKind.PROPERTYACCESS: {\r\n        return this.resolvePropertyAccess(\r\n          <PropertyAccessExpression>expression,\r\n          contextualFunction\r\n        );\r\n      }\r\n      case NodeKind.ELEMENTACCESS: {\r\n        return this.resolveElementAccess(\r\n          <ElementAccessExpression>expression,\r\n          contextualFunction\r\n        );\r\n      }\r\n      case NodeKind.CALL: {\r\n        let resolved = this.resolveExpression(\r\n          (<CallExpression>expression).expression,\r\n          contextualFunction\r\n        );\r\n        if (resolved) {\r\n          let element = resolved.element;\r\n          if (element && element.kind == ElementKind.FUNCTION_PROTOTYPE) {\r\n            let instance = (<FunctionPrototype>element).resolveUsingTypeArguments(\r\n              (<CallExpression>expression).typeArguments,\r\n              contextualFunction.contextualTypeArguments,\r\n              expression\r\n            );\r\n            if (instance) {\r\n              let returnType = instance.signature.returnType;\r\n              let classType = returnType.classType;\r\n              if (classType) {\r\n                if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n                return resolvedElement.set(classType);\r\n              } else {\r\n                let signature = returnType.functionType;\r\n                if (signature) {\r\n                  let functionTarget = signature.cachedFunctionTarget;\r\n                  if (!functionTarget) {\r\n                    functionTarget = new FunctionTarget(this, signature);\r\n                    signature.cachedFunctionTarget = functionTarget;\r\n                  }\r\n                  if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n                  return resolvedElement.set(functionTarget);\r\n                }\r\n              }\r\n            }\r\n          }\r\n        }\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 null;\r\n  }\r\n}\r\n\r\n/** Common result structure returned when calling any of the resolve functions on a {@link Program}. */\r\nexport class ResolvedElement {\r\n\r\n  /** The target element, if a property or element access */\r\n  target: Element | null;\r\n  /** The target element's expression, if a property or element access. */\r\n  targetExpression: Expression | null;\r\n  /** The element being accessed. */\r\n  element: Element;\r\n\r\n  /** Clears the target and sets the resolved element. */\r\n  set(element: Element): this {\r\n    this.target = null;\r\n    this.targetExpression = null;\r\n    this.element = element;\r\n    return this;\r\n  }\r\n\r\n  /** Sets the resolved target in addition to the previously set element. */\r\n  withTarget(target: Element, targetExpression: Expression): this {\r\n    this.target = target;\r\n    this.targetExpression = targetExpression;\r\n    return this;\r\n  }\r\n\r\n  /** Tests if the target is a valid instance target. */\r\n  get isInstanceTarget(): bool {\r\n    return (\r\n      this.target != null &&\r\n      this.target.kind == ElementKind.CLASS &&\r\n      this.targetExpression != null\r\n    );\r\n  }\r\n}\r\n\r\n// Cached result structure instance\r\nvar resolvedElement: ResolvedElement | null;\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}\r\n\r\n/** Indicates traits of a {@link Node} or {@link Element}. */\r\nexport enum CommonFlags {\r\n  /** No flags set. */\r\n  NONE = 0,\r\n\r\n  // Basic modifiers\r\n\r\n  /** Has an `import` modifier. */\r\n  IMPORT = 1 << 0,\r\n  /** Has an `export` modifier. */\r\n  EXPORT = 1 << 1,\r\n  /** Has a `declare` modifier. */\r\n  DECLARE = 1 << 2,\r\n  /** Has a `const` modifier. */\r\n  CONST = 1 << 3,\r\n  /** 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  // Internal decorators\r\n\r\n  /** Is global. */\r\n  GLOBAL = 1 << 13,\r\n  /** Is built-in. */\r\n  BUILTIN = 1 << 14,\r\n  /** Is unmanaged. */\r\n  UNMANAGED = 1 << 15,\r\n\r\n  // Extended modifiers usually derived from basic modifiers or internal decorators\r\n\r\n  /** Is ambient, that is either declared or nested in a declared element. */\r\n  AMBIENT = 1 << 16,\r\n  /** Is generic. */\r\n  GENERIC = 1 << 17,\r\n  /** Is part of a generic context. */\r\n  GENERIC_CONTEXT = 1 << 18,\r\n  /** Is an instance member. */\r\n  INSTANCE = 1 << 19,\r\n  /** Is a constructor. */\r\n  CONSTRUCTOR = 1 << 20,\r\n  /** Is an arrow function. */\r\n  ARROW = 1 << 21,\r\n  /** Is a module export. */\r\n  MODULE_EXPORT = 1 << 22,\r\n  /** Is a module import. */\r\n  MODULE_IMPORT = 1 << 23,\r\n\r\n  // Compilation states\r\n\r\n  /** Is compiled. */\r\n  COMPILED = 1 << 24,\r\n  /** Has a constant value and is therefore inlined. */\r\n  INLINED = 1 << 25,\r\n  /** Is scoped. */\r\n  SCOPED = 1 << 26\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  /** Namespaced member elements. */\r\n  members: Map<string,Element> | null = null;\r\n  /** Parent namespace, if applicable. */\r\n  namespace: 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}\r\n\r\n/** A namespace. */\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  /** Parent enum. */\r\n  enum: Enum;\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.enum = 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;\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  withConstantIntegerValue(lo: i32, hi: i32): this {\r\n    this.constantValueKind = ConstantValueKind.INTEGER;\r\n    this.constantIntegerValue = i64_new(lo, hi);\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    declaration: VariableLikeDeclarationStatement,\r\n    type: Type\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\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\r\n  constructor(program: Program, simpleName: string, index: i32, type: Type) {\r\n    super(program, simpleName, simpleName);\r\n    this.index = index;\r\n    this.type = type;\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\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  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n    this.classPrototype = classPrototype;\r\n  }\r\n\r\n  /** Resolves this prototype to an instance using the specified concrete type arguments. */\r\n  resolve(\r\n    functionTypeArguments: Type[] | null = null,\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ): Function | null {\r\n    var instanceKey = functionTypeArguments ? typesToString(functionTypeArguments) : \"\";\r\n    var instance = this.instances.get(instanceKey);\r\n    if (instance) return instance;\r\n\r\n    var declaration = this.declaration;\r\n    var isInstance = this.is(CommonFlags.INSTANCE);\r\n    var classPrototype = this.classPrototype;\r\n\r\n    // inherit contextual type arguments as provided. might be 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 = this.classTypeArguments;\r\n    if (classTypeArguments) { // set only if partially resolved\r\n      assert(this.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 (functionTypeArguments && (numFunctionTypeArguments = functionTypeArguments.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          functionTypeArguments[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 = assert(classPrototype).resolve(classTypeArguments, contextualTypeArguments); // reports\r\n      if (!classInstance) return null;\r\n      thisType = classInstance.type;\r\n    }\r\n\r\n    // resolve signature node\r\n    var signatureParameters = signatureNode.parameterTypes;\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.program.resolveType(typeNode, contextualTypeArguments, true); // reports\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 (this.is(CommonFlags.SET) || this.is(CommonFlags.CONSTRUCTOR)) {\r\n      returnType = Type.void; // not annotated\r\n    } else {\r\n      let typeNode = assert(signatureNode.returnType);\r\n      let type = this.program.resolveType(typeNode, contextualTypeArguments, true); // reports\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 = this.internalName;\r\n    if (instanceKey.length) internalName += \"<\" + instanceKey + \">\";\r\n    instance = new Function(this, internalName, signature, classInstance ? classInstance : classPrototype);\r\n    instance.contextualTypeArguments = contextualTypeArguments;\r\n    this.instances.set(instanceKey, instance);\r\n    return instance;\r\n  }\r\n\r\n  /** Resolves this prototype partially by applying the specified inherited class type arguments. */\r\n  resolvePartial(classTypeArguments: Type[] | null): FunctionPrototype | null {\r\n    assert(this.is(CommonFlags.INSTANCE));\r\n    assert(this.classPrototype);\r\n    if (classTypeArguments && classTypeArguments.length) {\r\n      let partialPrototype = new FunctionPrototype(\r\n        this.program,\r\n        this.simpleName,\r\n        this.internalName,\r\n        this.declaration,\r\n        this.classPrototype\r\n      );\r\n      partialPrototype.flags = this.flags;\r\n      partialPrototype.classTypeArguments = classTypeArguments;\r\n      return partialPrototype;\r\n    }\r\n    return this; // no need to clone\r\n  }\r\n\r\n  /** Resolves the specified type arguments prior to resolving this prototype to an instance. */\r\n  resolveUsingTypeArguments(\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    reportNode: Node\r\n  ): Function | null {\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n    if (this.is(CommonFlags.GENERIC)) {\r\n      assert(typeArgumentNodes != null && typeArgumentNodes.length != 0);\r\n      resolvedTypeArguments = this.program.resolveTypeArguments(\r\n        assert(this.declaration.typeParameters),\r\n        typeArgumentNodes,\r\n        contextualTypeArguments,\r\n        reportNode\r\n      );\r\n      if (!resolvedTypeArguments) return null;\r\n    }\r\n    return this.resolve(resolvedTypeArguments, contextualTypeArguments);\r\n  }\r\n\r\n  /** Resolves the type arguments to use when compiling a built-in call. Must be a built-in. */\r\n  resolveBuiltinTypeArguments(\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null\r\n  ): Type[] | null {\r\n    assert(this.is(CommonFlags.BUILTIN));\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n    if (typeArgumentNodes) {\r\n      let k = typeArgumentNodes.length;\r\n      resolvedTypeArguments = new Array<Type>(k);\r\n      for (let i = 0; i < k; ++i) {\r\n        let resolvedType = this.program.resolveType( // reports\r\n          typeArgumentNodes[i],\r\n          contextualTypeArguments,\r\n          true\r\n        );\r\n        if (!resolvedType) return null;\r\n        resolvedTypeArguments[i] = resolvedType;\r\n      }\r\n    }\r\n    return resolvedTypeArguments;\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  /** If a member of another namespace-like element, the concrete element it is a member of. */\r\n  memberOf: Element | null;\r\n  /** Map of locals by name. */\r\n  locals: Map<string,Local> = new Map();\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[] | null = null;\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\r\n  private nextBreakId: i32 = 0;\r\n  private breakStack: i32[] | null = null;\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    memberOf: Element | 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.memberOf = memberOf;\r\n    this.flags = prototype.flags;\r\n    if (!(prototype.is(CommonFlags.BUILTIN) || prototype.is(CommonFlags.DECLARE))) {\r\n      let localIndex = 0;\r\n      if (memberOf && memberOf.kind == ElementKind.CLASS) {\r\n        assert(this.is(CommonFlags.INSTANCE));\r\n        this.locals.set(\r\n          \"this\",\r\n          new Local(\r\n            prototype.program,\r\n            \"this\",\r\n            localIndex++,\r\n            assert(signature.thisType)\r\n          )\r\n        );\r\n        let contextualTypeArguments = (<Class>memberOf).contextualTypeArguments;\r\n        if (contextualTypeArguments) {\r\n          if (!this.contextualTypeArguments) {\r\n            this.contextualTypeArguments = new Map();\r\n          }\r\n          for (let [inheritedName, inheritedType] of contextualTypeArguments) {\r\n            this.contextualTypeArguments.set(inheritedName, inheritedType);\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        this.locals.set(\r\n          parameterName,\r\n          new Local(\r\n            prototype.program,\r\n            parameterName,\r\n            localIndex++,\r\n            parameterType\r\n          )\r\n        );\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): 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    );\r\n    if (name) {\r\n      if (this.locals.has(name)) throw new Error(\"duplicate local name\");\r\n      this.locals.set(name, local);\r\n    }\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): 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    if (temps && temps.length) {\r\n      let ret = temps.pop();\r\n      ret.type = type;\r\n      return ret;\r\n    }\r\n    return this.addLocal(type);\r\n  }\r\n\r\n  /** Frees the temporary local for reuse. */\r\n  freeTempLocal(local: Local): void {\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    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): 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    if (temps.length > 0) {\r\n      return temps[temps.length - 1];\r\n    }\r\n    var local: Local = this.addLocal(type);\r\n    temps.push(local);\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) {\r\n      this.breakStack = [ id ];\r\n    } else {\r\n      this.breakStack.push(id);\r\n    }\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      if (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    this.debugLocations = null;\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(prototype: FieldPrototype, internalName: string, type: Type) {\r\n    super(prototype.program, prototype.simpleName, internalName);\r\n    this.prototype = prototype;\r\n    this.flags = prototype.flags;\r\n    this.type = type;\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\r\n  /** Overloaded indexed get method, if any. */\r\n  fnIndexedGet: string | null = null;\r\n  /** Overloaded indexed set method, if any. */\r\n  fnIndexedSet: string | null = null;\r\n  /** Overloaded concatenation method, if any. */\r\n  fnConcat: string | null = null;\r\n  /** Overloaded equality comparison method, if any. */\r\n  fnEquals: string | null = null;\r\n\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: ClassDeclaration\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  /** Resolves this prototype to an instance using the specified concrete type arguments. */\r\n  resolve(\r\n    typeArguments: Type[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ): Class | null {\r\n    var instanceKey = typeArguments ? typesToString(typeArguments) : \"\";\r\n    var instance = this.instances.get(instanceKey);\r\n    if (instance) return instance;\r\n\r\n    // inherit contextual type arguments\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    var declaration = this.declaration;\r\n    var baseClass: Class | null = null;\r\n    if (declaration.extendsType) {\r\n      let baseClassType = this.program.resolveType(declaration.extendsType, null); // reports\r\n      if (!baseClassType) return null;\r\n      if (!(baseClass = baseClassType.classType)) {\r\n        this.program.error(\r\n          DiagnosticCode.A_class_may_only_extend_another_class,\r\n          declaration.extendsType.range\r\n        );\r\n        return null;\r\n      }\r\n      if (baseClass.prototype.is(CommonFlags.UNMANAGED) != this.is(CommonFlags.UNMANAGED)) {\r\n        this.program.error(\r\n          DiagnosticCode.Structs_cannot_extend_classes_and_vice_versa,\r\n          Range.join(declaration.name.range, declaration.extendsType.range)\r\n        );\r\n        return null;\r\n      }\r\n    }\r\n\r\n    // override call specific contextual type arguments if provided\r\n    var i: i32, k: i32;\r\n    if (typeArguments) {\r\n      if ((k = typeArguments.length) != declaration.typeParameters.length) {\r\n        throw new Error(\"type argument count mismatch\");\r\n      }\r\n      for (i = 0; i < k; ++i) {\r\n        contextualTypeArguments.set(declaration.typeParameters[i].name.text, typeArguments[i]);\r\n      }\r\n    } else if (declaration.typeParameters.length) {\r\n      throw new Error(\"type argument count mismatch\");\r\n    }\r\n\r\n    var internalName = this.internalName;\r\n    if (instanceKey.length) {\r\n      internalName += \"<\" + instanceKey + \">\";\r\n    }\r\n    instance = new Class(this, internalName, typeArguments, baseClass);\r\n    instance.contextualTypeArguments = contextualTypeArguments;\r\n    this.instances.set(instanceKey, instance);\r\n\r\n    var memoryOffset: u32 = 0;\r\n    if (baseClass) {\r\n      memoryOffset = baseClass.currentMemoryOffset;\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    }\r\n\r\n    if (this.constructorPrototype) {\r\n      let partialConstructor = this.constructorPrototype.resolvePartial(typeArguments); // reports\r\n      if (partialConstructor) {\r\n        instance.constructorInstance = partialConstructor.resolve(); // reports\r\n      }\r\n      // TODO: ^ doesn't know the return type, hence returns null\r\n    }\r\n\r\n    if (this.instanceMembers) {\r\n      for (let member of this.instanceMembers.values()) {\r\n        switch (member.kind) {\r\n          case ElementKind.FIELD_PROTOTYPE: { // fields are layed out in advance\r\n            if (!instance.members) instance.members = new Map();\r\n            let fieldDeclaration = (<FieldPrototype>member).declaration;\r\n            if (!fieldDeclaration.type) {\r\n              throw new Error(\"type expected\"); // TODO: check if parent class defines a type\r\n            }\r\n            let fieldType = this.program.resolveType( // reports\r\n              fieldDeclaration.type,\r\n              instance.contextualTypeArguments\r\n            );\r\n            if (fieldType) {\r\n              let fieldInstance = new Field(\r\n                <FieldPrototype>member,\r\n                internalName + INSTANCE_DELIMITER + (<FieldPrototype>member).simpleName,\r\n                fieldType\r\n              );\r\n              switch (fieldType.byteSize) { // align\r\n                case 1: break;\r\n                case 2: {\r\n                  if (memoryOffset & 1) ++memoryOffset;\r\n                  break;\r\n                }\r\n                case 4: {\r\n                  if (memoryOffset & 3) memoryOffset = (memoryOffset | 3) + 1;\r\n                  break;\r\n                }\r\n                case 8: {\r\n                  if (memoryOffset & 7) memoryOffset = (memoryOffset | 7) + 1;\r\n                  break;\r\n                }\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            }\r\n            break;\r\n          }\r\n          case ElementKind.FUNCTION_PROTOTYPE: { // instance methods remain partially resolved prototypes until compiled\r\n            if (!instance.members) instance.members = new Map();\r\n            let methodPrototype = (<FunctionPrototype>member).resolvePartial(typeArguments); // reports\r\n            if (methodPrototype) {\r\n              methodPrototype.internalName = internalName + INSTANCE_DELIMITER + methodPrototype.simpleName;\r\n              instance.members.set(member.simpleName, methodPrototype);\r\n            }\r\n            break;\r\n          }\r\n          case ElementKind.PROPERTY: { // instance properties are cloned with partially resolved getters and setters\r\n            if (!instance.members) instance.members = new Map();\r\n            let getterPrototype = assert((<Property>member).getterPrototype);\r\n            let setterPrototype = (<Property>member).setterPrototype;\r\n            let instanceProperty = new Property(\r\n              this.program,\r\n              member.simpleName,\r\n              internalName + INSTANCE_DELIMITER + member.simpleName,\r\n              this\r\n            );\r\n            let partialGetterPrototype = getterPrototype.resolvePartial(typeArguments);\r\n            if (!partialGetterPrototype) return null;\r\n            partialGetterPrototype.internalName = (\r\n              internalName + INSTANCE_DELIMITER + partialGetterPrototype.simpleName\r\n            );\r\n            instanceProperty.getterPrototype = partialGetterPrototype;\r\n            if (setterPrototype) {\r\n              let partialSetterPrototype = setterPrototype.resolvePartial(typeArguments);\r\n              if (!partialSetterPrototype) return null;\r\n              partialSetterPrototype.internalName = (\r\n                internalName + INSTANCE_DELIMITER + partialSetterPrototype.simpleName\r\n              );\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    instance.currentMemoryOffset = memoryOffset; // sizeof<this>() is its byte size in memory\r\n    return instance;\r\n  }\r\n\r\n  /** Resolves the specified type arguments prior to resolving this prototype to an instance. */\r\n  resolveUsingTypeArguments(\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    alternativeReportNode: Node | null\r\n  ): Class | null {\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n    if (this.is(CommonFlags.GENERIC)) {\r\n      assert(typeArgumentNodes != null && typeArgumentNodes.length != 0);\r\n      resolvedTypeArguments = this.program.resolveTypeArguments(\r\n        this.declaration.typeParameters,\r\n        typeArgumentNodes,\r\n        contextualTypeArguments,\r\n        alternativeReportNode\r\n      );\r\n      if (!resolvedTypeArguments) return null;\r\n    } else {\r\n      assert(typeArgumentNodes == null || !typeArgumentNodes.length);\r\n    }\r\n    return this.resolve(resolvedTypeArguments, contextualTypeArguments);\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\r\n  /** Constructs a new class. */\r\n  constructor(\r\n    prototype: ClassPrototype,\r\n    internalName: string,\r\n    typeArguments: Type[] | null = null,\r\n    base: Class | null = null\r\n  ) {\r\n    super(prototype.program, prototype.simpleName, internalName);\r\n    this.prototype = prototype;\r\n    this.flags = prototype.flags;\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      if (base.contextualTypeArguments) {\r\n        if (!this.contextualTypeArguments) this.contextualTypeArguments = new Map();\r\n        for (let [baseName, baseType] of base.contextualTypeArguments) {\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 {\r\n      if (current == target) {\r\n        return true;\r\n      }\r\n    } while (current = current.base);\r\n    return false;\r\n  }\r\n\r\n  toString(): string {\r\n    return this.prototype.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  ) {\r\n    super(program, simpleName, internalName, declaration);\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    internalName: string,\r\n    typeArguments: Type[] = [],\r\n    base: Interface | null = null\r\n  ) {\r\n    super(prototype, 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  /** This branch always returns. */\r\n  RETURNS = 1 << 0,\r\n  /** This branch possibly throws. */\r\n  POSSIBLY_THROWS = 1 << 1,\r\n  /** This branch possible breaks. */\r\n  POSSIBLY_BREAKS = 1 << 2,\r\n  /** This branch possible continues. */\r\n  POSSIBLY_CONTINUES = 1 << 3\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  /** Scoped local variables. */\r\n  scopedLocals: Map<string,Local> | null = 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    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\r\n  /** Sets the specified flag or flags. */\r\n  set(flag: FlowFlags): void { this.flags |= flag; }\r\n\r\n  /** Enters a new branch or scope and returns the new flow. */\r\n  enterBranchOrScope(): Flow {\r\n    var branchFlow = new Flow();\r\n    branchFlow.parent = this;\r\n    branchFlow.flags = this.flags;\r\n    branchFlow.currentFunction = this.currentFunction;\r\n    branchFlow.continueLabel = this.continueLabel;\r\n    branchFlow.breakLabel = this.breakLabel;\r\n    return branchFlow;\r\n  }\r\n\r\n  /** Leaves the current branch or scope and returns the parent flow. */\r\n  leaveBranchOrScope(): Flow {\r\n    var parent = assert(this.parent);\r\n\r\n    // Free block-scoped locals\r\n    if (this.scopedLocals) {\r\n      for (let scopedLocal of this.scopedLocals.values()) {\r\n        this.currentFunction.freeTempLocal(scopedLocal);\r\n      }\r\n      this.scopedLocals = null;\r\n    }\r\n\r\n    // Propagate flags to parent\r\n    if (this.is(FlowFlags.POSSIBLY_THROWS)) {\r\n      parent.set(FlowFlags.POSSIBLY_THROWS);\r\n    }\r\n    if (this.is(FlowFlags.POSSIBLY_BREAKS) && parent.breakLabel == this.breakLabel) {\r\n      parent.set(FlowFlags.POSSIBLY_BREAKS);\r\n    }\r\n    if (this.is(FlowFlags.POSSIBLY_CONTINUES) && parent.continueLabel == this.continueLabel) {\r\n      parent.set(FlowFlags.POSSIBLY_CONTINUES);\r\n    }\r\n\r\n    return parent;\r\n  }\r\n\r\n  /** Adds a new scoped local of the specified name. */\r\n  addScopedLocal(name: string, type: Type, reportNode: Node): void {\r\n    var scopedLocal = this.currentFunction.getTempLocal(type);\r\n    if (!this.scopedLocals) this.scopedLocals = new Map();\r\n    else if (this.scopedLocals.has(name)) {\r\n      this.currentFunction.program.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        reportNode.range\r\n      );\r\n      return;\r\n    }\r\n    this.scopedLocals.set(name, scopedLocal);\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.locals.get(name);\r\n  }\r\n\r\n  /** Finalizes this flow. Must be the topmost parent flow of the function. */\r\n  finalize(): bool {\r\n    assert(this.parent == null, \"must be the topmost parent flow\");\r\n    this.continueLabel = null;\r\n    this.breakLabel = null;\r\n    return this.is(FlowFlags.RETURNS);\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 * 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[93m\";\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))) {\r\n    start--;\r\n  }\r\n  while (end < len && !isLineBreak(text.charCodeAt(end))) {\r\n    end++;\r\n  }\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) {\r\n      sb.push(\"~\");\r\n    }\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 * 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 enum NativeType {\r\n  None = _BinaryenTypeNone(),\r\n  I32 = _BinaryenTypeInt32(),\r\n  I64 = _BinaryenTypeInt64(),\r\n  F32 = _BinaryenTypeFloat32(),\r\n  F64 =  _BinaryenTypeFloat64(),\r\n  Unreachable = _BinaryenTypeUnreachable(),\r\n  Auto = _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/threads/blob/master/proposals/threads/Overview.md#new-sign-extending-operators\r\n  // ExtendI8ToI32 =_BinaryenExtendS8Int32()\r\n  // ExtendI16ToI32 = _BinaryenExtendS16Int32()\r\n  // ExtendI8ToI64 = _BinaryenExtendS8Int64() // operand is I64\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  out: 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.out = allocate_memory(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.out = allocate_memory(3 * 8); // LLVM C-ABI, max used is 3 * usize\r\n      return module;\r\n    } finally {\r\n      free_memory(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      free_memory(cArr);\r\n      free_memory(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      free_memory(cArr);\r\n    }\r\n  }\r\n\r\n  // constants\r\n\r\n  createI32(value: i32): ExpressionRef {\r\n    var out = this.out;\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.out;\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.out;\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.out;\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 = allocI32Array(operands);\r\n    try {\r\n      return _BinaryenHost(this.ref, op, cStr, cArr, operands ? (<ExpressionRef[]>operands).length : 0);\r\n    } finally {\r\n      free_memory(cArr);\r\n      free_memory(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      free_memory(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      free_memory(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 = allocI32Array(children);\r\n    try {\r\n      return _BinaryenBlock(this.ref, cStr, cArr, children.length, type);\r\n    } finally {\r\n      free_memory(cArr);\r\n      free_memory(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      free_memory(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      free_memory(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      free_memory(cStr);\r\n      free_memory(cArr);\r\n      for (let i = numNames - 1; i >= 0; --i) free_memory(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 = allocI32Array(operands);\r\n    try {\r\n      return _BinaryenCall(this.ref, cStr, cArr, operands && operands.length || 0, returnType);\r\n    } finally {\r\n      free_memory(cArr);\r\n      free_memory(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 = allocI32Array(operands);\r\n    try {\r\n      return _BinaryenCallImport(this.ref, cStr, cArr, operands && operands.length || 0, returnType);\r\n    } finally {\r\n      free_memory(cArr);\r\n      free_memory(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 = allocI32Array(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      free_memory(cStr);\r\n      free_memory(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      free_memory(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      free_memory(cArr);\r\n      free_memory(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      free_memory(cStr);\r\n    }\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      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr2);\r\n      free_memory(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      free_memory(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      free_memory(cStr3);\r\n      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr3);\r\n      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr3);\r\n      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr3);\r\n      free_memory(cStr2);\r\n      free_memory(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      free_memory(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      free_memory(cArr3);\r\n      free_memory(cArr2);\r\n      free_memory(cArr1);\r\n      for (let i = k - 1; i >= 0; --i) free_memory(segs[i]);\r\n      free_memory(cStr);\r\n    }\r\n  }\r\n\r\n  setFunctionTable(funcs: FunctionRef[]): void {\r\n    var cArr = allocI32Array(funcs);\r\n    try {\r\n      _BinaryenSetFunctionTable(this.ref, cArr, funcs.length);\r\n    } finally {\r\n      free_memory(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  setOptimizeLevel(level: i32 = 2): void {\r\n    _BinaryenSetOptimizeLevel(level);\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      free_memory(cArr);\r\n      for (let i = numNames; i >= 0; --i) {\r\n        free_memory(names[i]);\r\n      }\r\n    }\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.out;\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) free_memory(cStr);\r\n      if (binaryPtr) free_memory(binaryPtr);\r\n      if (sourceMapPtr) free_memory(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    if (!this.ref) return; // sic\r\n    _BinaryenModuleDispose(this.ref);\r\n    free_memory(this.out);\r\n  }\r\n\r\n  createRelooper(): Relooper {\r\n    return Relooper.create(this);\r\n  }\r\n\r\n  cloneExpression(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 _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      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      free_memory(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\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  static createStub(module: Module): Relooper {\r\n    var relooper = new Relooper();\r\n    relooper.module = module;\r\n    relooper.ref = 0;\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      free_memory(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// 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 = allocate_memory(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 = allocate_memory(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 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 = allocate_memory(stringLengthUTF8(str) + 1);\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    // 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","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 * 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 \"./program\";\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} 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  COMMA,\r\n  ELEMENTACCESS,\r\n  FALSE,\r\n  FUNCTION,\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/** 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 a specific 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.parameterTypes = 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    expression: 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 = expression; expression.parent = stmt;\r\n    stmt.arguments = args; if (args) setParent(args, stmt);\r\n    if (expression.kind == NodeKind.IDENTIFIER) {\r\n      switch ((<IdentifierExpression>expression).text) {\r\n        case \"global\": {\r\n          stmt.decoratorKind = DecoratorKind.GLOBAL;\r\n          break;\r\n        }\r\n        case \"operator\": {\r\n          stmt.decoratorKind = DecoratorKind.OPERATOR;\r\n          break;\r\n        }\r\n        case \"unmanaged\": {\r\n          stmt.decoratorKind = DecoratorKind.UNMANAGED;\r\n          break;\r\n        }\r\n        case \"offset\": {\r\n          stmt.decoratorKind = DecoratorKind.OFFSET;\r\n          break;\r\n        }\r\n        default: {\r\n          stmt.decoratorKind = DecoratorKind.CUSTOM;\r\n          break;\r\n        }\r\n      }\r\n    } else {\r\n      stmt.decoratorKind = DecoratorKind.CUSTOM;\r\n    }\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 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 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 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[], // can't be a function\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; 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[],\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; 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    extendsType: TypeNode | null, // can't be a function\r\n    members: DeclarationStatement[],\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.extendsType = extendsType; if (extendsType) extendsType.parent = stmt;\r\n    stmt.members = members; setParent(members, 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}\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  parameterTypes: 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  UNMANAGED,\r\n  OFFSET\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 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 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 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\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  /** 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\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    this.internalPath = mangleInternalPath(this.normalizedPath);\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. */\r\n  extendsType: TypeNode | null; // can't be a function\r\n  /** Interface types being implemented. */\r\n  implementsTypes: TypeNode[]; // can't be a function\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. */\r\n  members: ExportMember[];\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\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/** Gets the first decorator by name within at set of decorators, if present. */\r\nexport function getFirstDecorator(name: string, 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      let expression = decorator.name;\r\n      if (expression.kind == NodeKind.IDENTIFIER && (<IdentifierExpression>expression).text == name) {\r\n        return decorator;\r\n      }\r\n    }\r\n  }\r\n  return null;\r\n}\r\n\r\n/** Tests if a specific decorator is present within the specified decorators. */\r\nexport function hasDecorator(name: string, decorators: DecoratorNode[] | null): bool {\r\n  return getFirstDecorator(name, decorators) != 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 * 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 function tokenFomKeyword(text: string): Token {\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    case \"break\": return Token.BREAK;\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    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    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    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    case \"get\": return Token.GET;\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    case \"keyof\": return Token.KEYOF;\r\n    case \"let\": return Token.LET;\r\n    case \"module\": return Token.MODULE;\r\n    case \"namespace\": return Token.NAMESPACE;\r\n    case \"new\": return Token.NEW;\r\n    case \"null\": return Token.NULL;\r\n    case \"of\": return Token.OF;\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    case \"readonly\": return Token.READONLY;\r\n    case \"return\": return Token.RETURN;\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    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    case \"var\": return Token.VAR;\r\n    case \"void\": return Token.VOID;\r\n    case \"while\": return Token.WHILE;\r\n    case \"with\": return Token.WITH;\r\n    case \"yield\": return Token.YIELD;\r\n    default: return Token.INVALID;\r\n  }\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.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(preferIdentifier: bool = false): Token {\r\n    this.nextToken = -1;\r\n    return this.token = this.unsafeNext(preferIdentifier);\r\n  }\r\n\r\n  private unsafeNext(preferIdentifier: bool = false, maxTokenLength: i32 = i32.MAX_VALUE): 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          ) {\r\n            ++this.pos;\r\n          }\r\n          break;\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 = tokenFomKeyword(keywordText);\r\n              if (\r\n                keywordToken != Token.INVALID &&\r\n                !(preferIdentifier && tokenIsAlsoIdentifier(keywordToken))\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    preferIdentifier: bool = false,\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(preferIdentifier, maxCompoundLength);\r\n      this.nextTokenPos = this.tokenPos;\r\n      if (checkOnNewLine) {\r\n        this.nextTokenOnNewLine = false;\r\n        while (--this.tokenPos > posBefore) {\r\n          if (isLineBreak(text.charCodeAt(this.tokenPos))) {\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  skip(token: Token): 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(token == Token.IDENTIFIER, 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    reusableState = state;\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) break;\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    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        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 {\r\n        break;\r\n      }\r\n      ++this.pos;\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    }\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    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 * 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 {\r\n        break;\r\n      }\r\n      ++this.pos;\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    }\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    while (this.pos < this.end) {\r\n      let c = text.charCodeAt(this.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 {\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    }\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    while (this.pos < this.end) {\r\n      let c = text.charCodeAt(this.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 {\r\n        break;\r\n      }\r\n      ++this.pos;\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    }\r\n    return value;\r\n  }\r\n\r\n  readFloat(): f64 {\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  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 * 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} 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 sized integer type with a target specific bit size. */\r\n  SIZE = 1 << 4,\r\n  /** Is a small type that is emulated in a larger type. */\r\n  SMALL = 1 << 5,\r\n  /** Is a long type 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. Ceiled to 8-bits. */\r\n  byteSize: i32;\r\n  /** Underlying class type, if a class type. */\r\n  classType: Class | null;\r\n  /** Underlying function type, if a function type. */\r\n  functionType: Signature | null;\r\n  /** Respective nullable type, if non-nullable. */\r\n  nullableType: Type | null = null;\r\n  /** Respective non-nullable type, if nullable. */\r\n  nonNullableType: Type;\r\n\r\n  /** Constructs a new resolved type. */\r\n  constructor(kind: TypeKind, flags: TypeFlags, size: i32) {\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.classType = null;\r\n    this.nonNullableType = this;\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    return ~0 >>> (targetType.size - this.size);\r\n  }\r\n\r\n  /** Tests if this type has 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  /** Tests if this type is a class type. */\r\n  get isClass(): bool { return this.classType != null; }\r\n  /** Tests if this type is a function type. */\r\n  get isFunction(): bool { return this.functionType != null; }\r\n  /** Tests if this type is a reference type. */\r\n  get isReference(): bool { return this.classType != null || this.functionType != null; }\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.classType);\r\n    var ret = new Type(this.kind, this.flags & ~TypeFlags.VALUE | TypeFlags.REFERENCE, this.size);\r\n    ret.classType = classType;\r\n    return ret;\r\n  }\r\n\r\n  /** Composes a function type from this type and a function. */\r\n  asFunction(functionType: Signature): Type {\r\n    assert(this.kind == TypeKind.U32 && !this.functionType);\r\n    var ret = new Type(this.kind, this.flags & ~TypeFlags.VALUE | TypeFlags.REFERENCE, this.size);\r\n    ret.functionType = functionType;\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.isReference);\r\n    if (!this.nullableType) {\r\n      assert(!this.is(TypeFlags.NULLABLE));\r\n      this.nullableType = new Type(this.kind, this.flags | TypeFlags.NULLABLE, this.size);\r\n      this.nullableType.classType = this.classType;       // either a class reference\r\n      this.nullableType.functionType = this.functionType; // or a function reference\r\n    }\r\n    return this.nullableType;\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, signednessIsImportant: 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.isReference) {\r\n      if (target.isReference) {\r\n        if (currentClass = this.classType) {\r\n          if (targetClass = target.classType) {\r\n            return currentClass.isAssignableTo(targetClass);\r\n          }\r\n        } else if (currentFunction = this.functionType) {\r\n          if (targetFunction = target.functionType) {\r\n            return currentFunction.isAssignableTo(targetFunction);\r\n          }\r\n        }\r\n      }\r\n    } else if (!target.isReference) {\r\n      if (this.is(TypeFlags.INTEGER)) {\r\n        if (target.is(TypeFlags.INTEGER)) {\r\n          if (!signednessIsImportant || 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)) {\r\n      return left;\r\n    } else if (left.isAssignableTo(right, signednessIsImportant)) {\r\n      return right;\r\n    }\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    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: {\r\n        let functionType = this.functionType;\r\n        return kindOnly || !functionType\r\n          ? \"u32\"\r\n          : functionType.toString(true);\r\n      }\r\n      case TypeKind.U64: return \"u64\";\r\n      case TypeKind.USIZE: {\r\n        let classType = this.classType;\r\n        return kindOnly || !classType\r\n          ? \"usize\"\r\n          : classType.toString();\r\n      }\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  // 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.SMALL    |\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.SMALL    |\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.SIZE     |\r\n    TypeFlags.INTEGER  |\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.SIZE     |\r\n    TypeFlags.INTEGER  |\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.SMALL    |\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.SMALL    |\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.SIZE     |\r\n    TypeFlags.INTEGER  |\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.SIZE     |\r\n    TypeFlags.INTEGER  |\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.SMALL    |\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) {\r\n    ret[i] = types[i].toNativeType();\r\n  }\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) {\r\n    sb[i] = types[i].toString();\r\n  }\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\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  }\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      : getGenericParameterName(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))) {\r\n        return false;\r\n      }\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) {\r\n      return false; // TODO\r\n    }\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) {\r\n      return false;\r\n    }\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)) {\r\n        return false;\r\n      }\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 this signature to a function type string. */\r\n  toSignatureString(): string {\r\n    var sb = [];\r\n    var thisType = this.thisType;\r\n    if (thisType) {\r\n      sb.push(thisType.toSignatureString());\r\n    }\r\n    var parameterTypes = this.parameterTypes;\r\n    for (let i = 0, k = parameterTypes.length; i < k; ++i) {\r\n      sb.push(parameterTypes[i].toSignatureString());\r\n    }\r\n    sb.push(this.returnType.toSignatureString());\r\n    return sb.join(\"\");\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) {\r\n          sb.push((<string[]>names)[i]);\r\n        } else {\r\n          sb.push(getGenericParameterName(i));\r\n        }\r\n        if (i >= optionalStart && i != restIndex) {\r\n          sb.push(\"?: \");\r\n        } else {\r\n          sb.push(\": \");\r\n        }\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 generic parameter names used where names are unknown.\r\nvar cachedGenericParameterNames: string[] | null = null;\r\n\r\n/** Gets the cached generic parameter name for the specified index. */\r\nexport function getGenericParameterName(index: i32): string {\r\n  if (!cachedGenericParameterNames) cachedGenericParameterNames = [];\r\n  for (let i = cachedGenericParameterNames.length; i <= index; ++i) {\r\n    cachedGenericParameterNames.push(\"arg$\" + i.toString(10));\r\n  }\r\n  return cachedGenericParameterNames[index - 1];\r\n}\r\n","/**\r\n * The AssemblyScript compiler.\r\n * @module compiler\r\n *//***/\r\n\r\nimport {\r\n  compileCall as compileBuiltinCall,\r\n  compileGetConstant as compileBuiltinGetConstant,\r\n  compileAllocate as compileBuiltinAllocate\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} from \"./module\";\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  CommonFlags,\r\n  ConstantValueKind,\r\n\r\n  PATH_DELIMITER,\r\n  LIBRARY_PREFIX\r\n} from \"./program\";\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\r\n  Statement,\r\n  BlockStatement,\r\n  BreakStatement,\r\n  ClassDeclaration,\r\n  ContinueStatement,\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  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  ParenthesizedExpression,\r\n  PropertyAccessExpression,\r\n  TernaryExpression,\r\n  ArrayLiteralExpression,\r\n  StringLiteralExpression,\r\n  UnaryPostfixExpression,\r\n  UnaryPrefixExpression\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  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, does not set up a memory. */\r\n  noMemory: bool = false;\r\n  /** If true, imports the memory provided by the embedder. */\r\n  importMemory: bool = false;\r\n  /** Static memory start offset. */\r\n  memoryBase: u32 = 0;\r\n  /** If true, generates information necessary for source maps. */\r\n  sourceMap: bool = false;\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\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/** Compiler interface. */\r\nexport class Compiler extends DiagnosticEmitter {\r\n\r\n  /** Program reference. */\r\n  program: Program;\r\n  /** Provided options. */\r\n  options: Options;\r\n  /** Module instance being compiled. */\r\n  module: Module;\r\n\r\n  /** Start function being compiled. */\r\n  startFunction: Function;\r\n  /** Start function statements. */\r\n  startFunctionBody: ExpressionRef[] = [];\r\n\r\n  /** Current function in compilation. */\r\n  currentFunction: 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\r\n  /** Counting memory offset. */\r\n  memoryOffset: I64;\r\n  /** Memory segments being compiled. */\r\n  memorySegments: MemorySegment[] = new Array();\r\n  /** Map of already compiled static string segments. */\r\n  stringSegments: Map<string,MemorySegment> = new Map();\r\n\r\n  /** Function table being compiled. */\r\n  functionTable: Function[] = new Array();\r\n\r\n  /** Already processed file names. */\r\n  files: Set<string> = new Set();\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    if (!options) options = new Options();\r\n    this.options = options;\r\n    this.memoryOffset = i64_new(\r\n      max(options.memoryBase, options.usizeType.byteSize) // leave space for `null`\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 wrapping top-level statements, of all files.\r\n    var startFunctionPrototype = assert(program.elementsLookup.get(\"start\"));\r\n    assert(startFunctionPrototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n    var startFunctionInstance = new Function(\r\n      <FunctionPrototype>startFunctionPrototype,\r\n      startFunctionPrototype.internalName,\r\n      new Signature([], Type.void)\r\n    );\r\n    this.startFunction = startFunctionInstance;\r\n    this.currentFunction = startFunctionInstance;\r\n\r\n    // compile entry file(s) while traversing to 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) {\r\n        this.compileSource(sources[i]);\r\n      }\r\n    }\r\n\r\n    // compile the start function if not empty\r\n    var startFunctionBody = this.startFunctionBody;\r\n    if (startFunctionBody.length) {\r\n      let typeRef = this.ensureFunctionType(startFunctionInstance.signature);\r\n      let funcRef: FunctionRef;\r\n      module.setStart(\r\n        funcRef = module.addFunction(\r\n          startFunctionInstance.internalName,\r\n          typeRef,\r\n          typesToNativeTypes(startFunctionInstance.additionalLocals),\r\n          module.createBlock(null, startFunctionBody)\r\n        )\r\n      );\r\n      startFunctionInstance.finalize(module, funcRef);\r\n    }\r\n\r\n    // set up static memory segments and the heap base pointer\r\n    if (!options.noMemory) {\r\n      let 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      let pages = i64_shr_u(i64_align(memoryOffset, 0x10000), i64_new(16, 0));\r\n      module.setMemory(\r\n        i64_low(pages),\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\r\n    // import memory if requested\r\n    if (options.importMemory) {\r\n      module.addMemoryImport(\"0\", \"env\", \"memory\");\r\n    }\r\n\r\n    // set up function table\r\n    var functionTable = this.functionTable;\r\n    var functionTableSize = functionTable.length;\r\n    if (functionTableSize) {\r\n      let entries = new Array<FunctionRef>(functionTableSize);\r\n      for (let i = 0; i < functionTableSize; ++i) {\r\n        entries[i] = functionTable[i].ref;\r\n      }\r\n      module.setFunctionTable(entries);\r\n    }\r\n\r\n    return module;\r\n  }\r\n\r\n  // sources\r\n\r\n  compileSourceByPath(normalizedPathWithoutExtension: string, reportNode: Node): void {\r\n    var sources = this.program.sources;\r\n\r\n    // try file.ts\r\n    var expected = normalizedPathWithoutExtension + \".ts\";\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      let source = sources[i];\r\n      if (source.normalizedPath == expected) {\r\n        this.compileSource(source);\r\n        return;\r\n      }\r\n    }\r\n\r\n    // try file/index.ts\r\n    expected = normalizedPathWithoutExtension + \"/index.ts\";\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      let source = sources[i];\r\n      if (source.normalizedPath == expected) {\r\n        this.compileSource(source);\r\n        return;\r\n      }\r\n    }\r\n\r\n    // try (lib)/file.ts\r\n    expected = LIBRARY_PREFIX + normalizedPathWithoutExtension + \".ts\";\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      let source = sources[i];\r\n      if (source.normalizedPath == expected) {\r\n        this.compileSource(source);\r\n        return;\r\n      }\r\n    }\r\n\r\n    this.error(\r\n      DiagnosticCode.File_0_not_found,\r\n      reportNode.range, normalizedPathWithoutExtension\r\n    );\r\n  }\r\n\r\n  compileSource(source: Source): void {\r\n    var files = this.files;\r\n    var normalizedPath = source.normalizedPath;\r\n    if (files.has(normalizedPath)) return;\r\n    files.add(normalizedPath);\r\n\r\n    // compile top-level statements\r\n    var noTreeShaking = this.options.noTreeShaking;\r\n    var isEntry = source.isEntry;\r\n    var startFunction = this.startFunction;\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, []);\r\n          }\r\n          break;\r\n        }\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 = startFunction;\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) || global.is(CommonFlags.AMBIENT | CommonFlags.BUILTIN)) return true;\r\n    global.set(CommonFlags.COMPILED);   // ^ built-ins are compiled on use\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\r\n      // resolve now if annotated\r\n      if (declaration.type) {\r\n        let resolvedType = this.program.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.compileExpression( // reports\r\n          declaration.initializer,\r\n          Type.void,\r\n          ConversionKind.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.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    }\r\n\r\n    var nativeType = global.type.toNativeType();\r\n    var isConstant = global.isAny(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 (isConstant) {\r\n        global.set(CommonFlags.MODULE_IMPORT);\r\n        module.addGlobalImport(\r\n          global.internalName,\r\n          global.namespace\r\n            ? global.namespace.simpleName\r\n            : \"env\",\r\n          global.simpleName,\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          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\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    // inlined constant can be compiled as-is\r\n    if (global.is(CommonFlags.INLINED)) {\r\n      initExpr = this.compileInlineConstant(global, global.type, true);\r\n\r\n    } else {\r\n\r\n      // evaluate initializer if present\r\n      if (declaration.initializer) {\r\n        if (!initExpr) {\r\n          initExpr = this.compileExpression(declaration.initializer, global.type);\r\n        }\r\n\r\n        // check if the initializer is constant\r\n        if (_BinaryenExpressionGetId(initExpr) != ExpressionId.Const) {\r\n\r\n          // if a constant global, check if the initializer becomes constant after precompute\r\n          if (isConstant) {\r\n            initExpr = this.precomputeExpressionRef(initExpr);\r\n            if (_BinaryenExpressionGetId(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      // initialize to zero if there's no initializer\r\n      } else {\r\n        initExpr = global.type.toNativeZero(module);\r\n      }\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 as-is\r\n\r\n      if (isConstant) {\r\n        let exprType = _BinaryenExpressionGetType(initExpr);\r\n        switch (exprType) {\r\n          case NativeType.I32: {\r\n            global.constantValueKind = ConstantValueKind.INTEGER;\r\n            global.constantIntegerValue = i64_new(_BinaryenConstGetValueI32(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              _BinaryenConstGetValueI64Low(initExpr),\r\n              _BinaryenConstGetValueI64High(initExpr)\r\n            );\r\n            break;\r\n          }\r\n          case NativeType.F32: {\r\n            global.constantValueKind = ConstantValueKind.FLOAT;\r\n            global.constantFloatValue = _BinaryenConstGetValueF32(initExpr);\r\n            break;\r\n          }\r\n          case NativeType.F64: {\r\n            global.constantValueKind = ConstantValueKind.FLOAT;\r\n            global.constantFloatValue = _BinaryenConstGetValueF64(initExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              global.declaration.range\r\n            );\r\n            global.constantValueKind = ConstantValueKind.INTEGER;\r\n            global.constantIntegerValue = i64_new(0);\r\n            break;\r\n          }\r\n        }\r\n        global.set(CommonFlags.INLINED); // inline the value from now on\r\n        if (declaration.isTopLevel) {    // but keep the element as it might be re-exported\r\n          module.addGlobal(internalName, nativeType, false, initExpr);\r\n        }\r\n        if (declaration.range.source.isEntry && declaration.isTopLevelExport) {\r\n          module.addGlobalExport(global.internalName, declaration.programLevelInternalName);\r\n        }\r\n\r\n      } else /* mutable */ {\r\n        module.addGlobal(internalName, nativeType, !isConstant, initExpr);\r\n      }\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\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        if (val.is(CommonFlags.INLINED)) {\r\n          if (element.declaration.isTopLevelExport) {\r\n            module.addGlobal(\r\n              val.internalName,\r\n              NativeType.I32,\r\n              false, // constant\r\n              module.createI32(val.constantValue)\r\n            );\r\n          }\r\n        } else {\r\n          let initExpr: ExpressionRef;\r\n          if (valueDeclaration.value) {\r\n            initExpr = this.compileExpression(<Expression>valueDeclaration.value, Type.i32);\r\n            if (_BinaryenExpressionGetId(initExpr) != ExpressionId.Const) {\r\n              initExpr = this.precomputeExpressionRef(initExpr);\r\n              if (_BinaryenExpressionGetId(initExpr) != ExpressionId.Const) {\r\n                if (element.is(CommonFlags.CONST)) {\r\n                  this.warning(\r\n                    DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n                    valueDeclaration.range\r\n                  );\r\n                }\r\n                initInStart = true;\r\n              }\r\n            }\r\n          } else if (previousValue == null) {\r\n            initExpr = module.createI32(0);\r\n          } else if (previousValue.is(CommonFlags.INLINED)) {\r\n            initExpr = module.createI32(previousValue.constantValue + 1);\r\n          } else {\r\n            // in TypeScript this errors with TS1061, but actually we can do:\r\n            initExpr = module.createBinary(BinaryOp.AddI32,\r\n              module.createGetGlobal(previousValue.internalName, NativeType.I32),\r\n              module.createI32(1)\r\n            );\r\n            if (element.is(CommonFlags.CONST)) {\r\n              this.warning(\r\n                DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n                valueDeclaration.range\r\n              );\r\n            }\r\n            initInStart = true;\r\n          }\r\n          if (initInStart) {\r\n            module.addGlobal(\r\n              val.internalName,\r\n              NativeType.I32,\r\n              true, // mutable\r\n              module.createI32(0)\r\n            );\r\n            this.startFunctionBody.push(module.createSetGlobal(val.internalName, initExpr));\r\n          } else {\r\n            module.addGlobal(val.internalName, NativeType.I32, false, initExpr);\r\n            if (_BinaryenExpressionGetType(initExpr) == NativeType.I32) {\r\n              val.constantValue = _BinaryenConstGetValueI32(initExpr);\r\n              val.set(CommonFlags.INLINED);\r\n            } else {\r\n              assert(false);\r\n              this.error(\r\n                DiagnosticCode.Operation_not_supported,\r\n                valueDeclaration.range\r\n              );\r\n              val.constantValue = 0;\r\n            }\r\n          }\r\n        }\r\n        previousValue = <EnumValue>val;\r\n\r\n        // export values if the enum is exported\r\n        if (element.declaration.range.source.isEntry && element.declaration.isTopLevelExport) {\r\n          if (member.is(CommonFlags.INLINED)) {\r\n            module.addGlobalExport(member.internalName, member.internalName);\r\n          } else if (valueDeclaration) {\r\n            this.warning(\r\n              DiagnosticCode.Cannot_export_a_mutable_global,\r\n              valueDeclaration.range\r\n            );\r\n          }\r\n        }\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 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      (<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    reportNode: Node\r\n  ): Function | null {\r\n    var instance = prototype.resolveUsingTypeArguments( // reports\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      reportNode\r\n    );\r\n    if (!(instance && this.compileFunction(instance))) return null;\r\n    return instance;\r\n  }\r\n\r\n  /** Either reuses or creates the function type matching the specified signature. */\r\n  private ensureFunctionType(signature: Signature): FunctionTypeRef {\r\n    var parameters = signature.parameterTypes;\r\n    var numParameters = parameters.length;\r\n    var thisType = signature.thisType;\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    for (let i = 0; i < numParameters; ++i, ++index) {\r\n      paramTypes[index] = signature.parameterTypes[i].toNativeType();\r\n    }\r\n    var resultType = signature.returnType.toNativeType();\r\n    var module = this.module;\r\n    var typeRef = module.getFunctionTypeBySignature(resultType, paramTypes);\r\n    if (!typeRef) {\r\n      typeRef = module.addFunctionType(signature.toSignatureString(), 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 | CommonFlags.BUILTIN) || instance.simpleName == \"abort\");\r\n    instance.set(CommonFlags.COMPILED);\r\n\r\n    // check that modifiers are matching but still compile as-is\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 typeRef = this.ensureFunctionType(instance.signature);\r\n    var module = this.module;\r\n    if (body) {\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.is(CommonFlags.ARROW));\r\n        stmt = this.compileExpression((<ExpressionStatement>body).expression, returnType);\r\n        flow.set(FlowFlags.RETURNS);\r\n      } else {\r\n        assert(body.kind == NodeKind.BLOCK);\r\n        stmt = this.compileStatement(body);\r\n        // make sure all branches return\r\n        let allBranchesReturn = flow.finalize();\r\n        if (returnType != Type.void && !allBranchesReturn) {\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      }\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    } else {\r\n      instance.set(CommonFlags.MODULE_IMPORT);\r\n\r\n      // create the function import\r\n      let namespace = instance.prototype.namespace;\r\n      ref = module.addFunctionImport(\r\n        instance.internalName,\r\n        namespace\r\n          ? namespace.simpleName\r\n          : \"env\",\r\n        instance.simpleName,\r\n        typeRef\r\n      );\r\n    }\r\n\r\n    // check module-level export\r\n    if (declaration.range.source.isEntry && declaration.isTopLevelExport) {\r\n      module.addFunctionExport(instance.internalName, declaration.name.text);\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: {\r\n          assert(false);\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            member.range\r\n          );\r\n          break;\r\n        }\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            this.compileFunctionUsingTypeArguments(\r\n              <FunctionPrototype>element,\r\n              [],\r\n              null,\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 module = this.module;\r\n    var exports = this.program.fileLevelExports;\r\n    var members = statement.members;\r\n    for (let i = 0, k = members.length; i < k; ++i) {\r\n      let member = members[i];\r\n      let internalExportName = (\r\n        statement.range.source.internalPath +\r\n        PATH_DELIMITER +\r\n        member.externalName.text\r\n      );\r\n      let element = exports.get(internalExportName);\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            let functionInstance = this.compileFunctionUsingTypeArguments(\r\n              <FunctionPrototype>element,\r\n              [],\r\n              null,\r\n              (<FunctionPrototype>element).declaration.name\r\n            );\r\n            if (functionInstance) {\r\n              let functionDeclaration = functionInstance.prototype.declaration;\r\n              if (functionDeclaration && functionDeclaration.needsExplicitExport(member)) {\r\n                module.addFunctionExport(functionInstance.internalName, member.externalName.text);\r\n              }\r\n            }\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.GLOBAL: {\r\n          if (this.compileGlobal(<Global>element) && statement.range.source.isEntry) {\r\n            let globalDeclaration = (<Global>element).declaration;\r\n            if (globalDeclaration && globalDeclaration.needsExplicitExport(member)) {\r\n              if ((<Global>element).is(CommonFlags.INLINED)) {\r\n                module.addGlobalExport(element.internalName, member.externalName.text);\r\n              } else {\r\n                this.warning(\r\n                  DiagnosticCode.Cannot_export_a_mutable_global,\r\n                  member.range\r\n                );\r\n              }\r\n            }\r\n          }\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    alternativeReportNode: Node | 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      alternativeReportNode\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 = prototype.resolveUsingTypeArguments( // reports\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      alternativeReportNode\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    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    functionTable.push(func);\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 expr: ExpressionRef;\r\n    switch (statement.kind) {\r\n      case NodeKind.BLOCK: {\r\n        expr = this.compileBlockStatement(<BlockStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.BREAK: {\r\n        expr = this.compileBreakStatement(<BreakStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.CONTINUE: {\r\n        expr = this.compileContinueStatement(<ContinueStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.DO: {\r\n        expr = this.compileDoStatement(<DoStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.EMPTY: {\r\n        expr = this.compileEmptyStatement(<EmptyStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.EXPRESSION: {\r\n        expr = this.compileExpressionStatement(<ExpressionStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.FOR: {\r\n        expr = this.compileForStatement(<ForStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.IF: {\r\n        expr = this.compileIfStatement(<IfStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.RETURN: {\r\n        expr = this.compileReturnStatement(<ReturnStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.SWITCH: {\r\n        expr = this.compileSwitchStatement(<SwitchStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.THROW: {\r\n        expr = this.compileThrowStatement(<ThrowStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.TRY: {\r\n        expr = this.compileTryStatement(<TryStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.VARIABLE: {\r\n        expr = this.compileVariableStatement(<VariableStatement>statement);\r\n        if (!expr) expr = module.createNop();\r\n        break;\r\n      }\r\n      case NodeKind.VOID: {\r\n        expr = this.compileVoidStatement(<VoidStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.WHILE: {\r\n        expr = 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.startFunction) {\r\n          return module.createNop();\r\n        }\r\n        // otherwise fall-through\r\n      }\r\n      default: {\r\n        assert(false);\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          statement.range\r\n        );\r\n        expr = module.createUnreachable();\r\n        break;\r\n      }\r\n    }\r\n    if (this.options.sourceMap) {\r\n      addDebugLocation(expr, statement.range, module, this.currentFunction);\r\n    }\r\n    return expr;\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    for (let i = 0; i < numStatements; ++i) {\r\n      stmts[i] = this.compileStatement(statements[i]);\r\n    }\r\n    return stmts; // array of 0-es in noEmit-mode\r\n  }\r\n\r\n  compileBlockStatement(statement: BlockStatement): ExpressionRef {\r\n    var statements = statement.statements;\r\n\r\n    // NOTE that we could optimize this to a NOP if empty or unwrap a single\r\n    // statement, but that's not what the source told us to do and left to the\r\n    // optimizer.\r\n\r\n    // Not actually a branch, but can contain its own scoped variables.\r\n    var flow = this.currentFunction.flow.enterBranchOrScope();\r\n    this.currentFunction.flow = flow;\r\n\r\n    var stmt = this.module.createBlock(null, this.compileStatements(statements), NativeType.None);\r\n    var stmtReturns = flow.is(FlowFlags.RETURNS);\r\n\r\n    // Switch back to the parent flow\r\n    flow = flow.leaveBranchOrScope();\r\n    this.currentFunction.flow = flow;\r\n    if (stmtReturns) {\r\n      flow.set(FlowFlags.RETURNS);\r\n    }\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.POSSIBLY_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.POSSIBLY_CONTINUES);\r\n    return module.createBreak(continueLabel);\r\n  }\r\n\r\n  compileDoStatement(statement: DoStatement): ExpressionRef {\r\n\r\n    // A do statement does not initiate a new branch because it is executed at\r\n    // least once, but has its own break and continue labels.\r\n    var currentFunction = this.currentFunction;\r\n    var label = currentFunction.enterBreakContext();\r\n    var flow = currentFunction.flow;\r\n    var previousBreakLabel = flow.breakLabel;\r\n    var previousContinueLabel = flow.continueLabel;\r\n\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\r\n    // Reset to the previous break and continue labels, if any.\r\n    flow.breakLabel = previousBreakLabel;\r\n    flow.continueLabel = previousContinueLabel;\r\n\r\n    var module = this.module;\r\n    var condExpr = makeIsTrueish(\r\n      this.compileExpression(statement.condition, Type.i32, ConversionKind.NONE),\r\n      this.currentType,\r\n      module\r\n    );\r\n\r\n    // No need to eliminate the condition in generic contexts as the statement is executed anyway.\r\n\r\n    this.currentFunction.leaveBreakContext();\r\n\r\n    return module.createBlock(breakLabel, [\r\n      module.createLoop(continueLabel,\r\n        module.createBlock(null, [\r\n          body,\r\n          module.createBreak(continueLabel, condExpr)\r\n        ], NativeType.None))\r\n    ], NativeType.None);\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);\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\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 context = currentFunction.enterBreakContext();\r\n    var flow = currentFunction.flow.enterBranchOrScope();\r\n    currentFunction.flow = flow;\r\n    var breakLabel = flow.breakLabel = \"break|\" + context;\r\n    flow.breakLabel = breakLabel;\r\n    var continueLabel = \"continue|\" + context;\r\n    flow.continueLabel = continueLabel;\r\n\r\n    // Compile in correct order\r\n    var module = this.module;\r\n    var initializer = statement.initializer\r\n      ? this.compileStatement(<Statement>statement.initializer)\r\n      : module.createNop();\r\n    var condition = statement.condition\r\n      ? this.compileExpression(<Expression>statement.condition, Type.i32)\r\n      : module.createI32(1);\r\n    var incrementor = statement.incrementor\r\n      ? this.compileExpression(<Expression>statement.incrementor, Type.void)\r\n      : module.createNop();\r\n    var body = this.compileStatement(statement.statement);\r\n    var alwaysReturns = !statement.condition && flow.is(FlowFlags.RETURNS);\r\n    // TODO: check other always-true conditions as well, not just omitted\r\n\r\n    // Switch back to the parent flow\r\n    flow = flow.leaveBranchOrScope();\r\n    currentFunction.flow = flow;\r\n    currentFunction.leaveBreakContext();\r\n\r\n    var expr = module.createBlock(breakLabel, [\r\n      initializer,\r\n      module.createLoop(continueLabel, module.createBlock(null, [\r\n        module.createIf(condition, module.createBlock(null, [\r\n          body,\r\n          incrementor,\r\n          module.createBreak(continueLabel)\r\n        ], NativeType.None))\r\n      ], NativeType.None))\r\n    ], NativeType.None);\r\n\r\n    // If the loop is guaranteed to run and return, propagate that and append a hint\r\n    if (alwaysReturns) {\r\n      flow.set(FlowFlags.RETURNS);\r\n      expr = module.createBlock(null, [\r\n        expr,\r\n        module.createUnreachable()\r\n      ]);\r\n    }\r\n    return expr;\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 = makeIsTrueish(\r\n      this.compileExpression(statement.condition, Type.i32, ConversionKind.NONE),\r\n      this.currentType,\r\n      module\r\n    );\r\n\r\n    // Eliminate unnecesssary branches in generic contexts if the condition is constant\r\n    if (\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT) &&\r\n      _BinaryenExpressionGetId(condExpr = this.precomputeExpressionRef(condExpr)) == ExpressionId.Const &&\r\n      _BinaryenExpressionGetType(condExpr) == NativeType.I32\r\n    ) {\r\n      let ret: ExpressionRef;\r\n      if (_BinaryenConstGetValueI32(condExpr)) {\r\n        ret = this.compileStatement(ifTrue);\r\n      } else if (ifFalse) {\r\n        ret = this.compileStatement(ifFalse);\r\n      } else {\r\n        ret = module.createNop();\r\n      }\r\n      return ret;\r\n    }\r\n\r\n    // Each arm initiates a branch\r\n    var flow = currentFunction.flow.enterBranchOrScope();\r\n    currentFunction.flow = flow;\r\n    var ifTrueExpr = this.compileStatement(ifTrue);\r\n    var ifTrueReturns = flow.is(FlowFlags.RETURNS);\r\n    flow = flow.leaveBranchOrScope();\r\n    currentFunction.flow = flow;\r\n\r\n    var ifFalseExpr: ExpressionRef = 0;\r\n    var ifFalseReturns = false;\r\n    if (ifFalse) {\r\n      flow = flow.enterBranchOrScope();\r\n      currentFunction.flow = flow;\r\n      ifFalseExpr = this.compileStatement(ifFalse);\r\n      ifFalseReturns = flow.is(FlowFlags.RETURNS);\r\n      flow = flow.leaveBranchOrScope();\r\n      currentFunction.flow = flow;\r\n    }\r\n    if (ifTrueReturns && ifFalseReturns) { // not necessary to append a hint\r\n      flow.set(FlowFlags.RETURNS);\r\n    }\r\n    return module.createIf(condExpr, ifTrueExpr, ifFalseExpr);\r\n  }\r\n\r\n  compileReturnStatement(statement: ReturnStatement): ExpressionRef {\r\n    var currentFunction = this.currentFunction;\r\n    var expression: ExpressionRef = 0;\r\n    if (statement.value) {\r\n      expression = this.compileExpression(\r\n        statement.value,\r\n        currentFunction.signature.returnType\r\n      );\r\n    }\r\n\r\n    // Remember that this flow returns\r\n    currentFunction.flow.set(FlowFlags.RETURNS);\r\n\r\n    return this.module.createReturn(expression);\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    // Everything within a switch uses the same break context\r\n    var context = currentFunction.enterBreakContext();\r\n\r\n    // introduce a local for evaluating the condition (exactly once)\r\n    var tempLocal = currentFunction.getTempLocal(Type.u32);\r\n    var tempLocalIndex = tempLocal.index;\r\n    var cases = statement.cases;\r\n    var numCases = cases.length;\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)\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.i32)\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    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      let body = new Array<ExpressionRef>(1 + numStatements);\r\n      body[0] = currentBlock;\r\n\r\n      // Each switch case initiates a new branch\r\n      let flow = currentFunction.flow.enterBranchOrScope();\r\n      currentFunction.flow = flow;\r\n      let breakLabel = \"break|\" + context;\r\n      flow.breakLabel = breakLabel;\r\n\r\n      let fallsThrough = i != numCases - 1;\r\n      let nextLabel = !fallsThrough ? breakLabel : \"case\" + (i + 1).toString(10) + \"|\" + context;\r\n      for (let j = 0; j < numStatements; ++j) {\r\n        body[j + 1] = this.compileStatement(statements[j]);\r\n      }\r\n      if (!(fallsThrough || flow.is(FlowFlags.RETURNS))) {\r\n        alwaysReturns = false; // ignore fall-throughs\r\n      }\r\n\r\n      // Switch back to the parent flow\r\n      currentFunction.flow = flow.leaveBranchOrScope();\r\n\r\n      currentBlock = module.createBlock(nextLabel, body, NativeType.None);\r\n    }\r\n    currentFunction.leaveBreakContext();\r\n\r\n    // If the switch has a default and always returns, propagate that\r\n    if (defaultIndex >= 0 && alwaysReturns) {\r\n      currentFunction.flow.set(FlowFlags.RETURNS);\r\n      // Binaryen understands that so we don't need a hint\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 possibly throws\r\n    flow.set(FlowFlags.POSSIBLY_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 this.module.createUnreachable();\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.startFunction &&\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    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 init: ExpressionRef = 0;\r\n      if (declaration.type) {\r\n        type = program.resolveType( // reports\r\n          declaration.type,\r\n          currentFunction.contextualTypeArguments\r\n        );\r\n        if (!type) continue;\r\n        if (declaration.initializer) {\r\n          init = this.compileExpression(declaration.initializer, type); // reports\r\n        }\r\n      } else if (declaration.initializer) { // infer type using void/NONE for proper literal inference\r\n        init = this.compileExpression( // reports\r\n          declaration.initializer,\r\n          Type.void,\r\n          ConversionKind.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      if (declaration.is(CommonFlags.CONST)) {\r\n        if (init) {\r\n          init = this.precomputeExpressionRef(init);\r\n          if (_BinaryenExpressionGetId(init) == ExpressionId.Const) {\r\n            let local = new Local(program, name, -1, type);\r\n            switch (_BinaryenExpressionGetType(init)) {\r\n              case NativeType.I32: {\r\n                local = local.withConstantIntegerValue(_BinaryenConstGetValueI32(init), 0);\r\n                break;\r\n              }\r\n              case NativeType.I64: {\r\n                local = local.withConstantIntegerValue(\r\n                  _BinaryenConstGetValueI64Low(init),\r\n                  _BinaryenConstGetValueI64High(init)\r\n                );\r\n                break;\r\n              }\r\n              case NativeType.F32: {\r\n                local = local.withConstantFloatValue(<f64>_BinaryenConstGetValueF32(init));\r\n                break;\r\n              }\r\n              case NativeType.F64: {\r\n                local = local.withConstantFloatValue(_BinaryenConstGetValueF64(init));\r\n                break;\r\n              }\r\n              default: {\r\n                assert(false);\r\n                this.error(\r\n                  DiagnosticCode.Operation_not_supported,\r\n                  declaration.range\r\n                );\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 0;\r\n            }\r\n            scopedLocals.set(name, local);\r\n            return 0;\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 (declaration.is(CommonFlags.LET)) { // here: not top-level\r\n        currentFunction.flow.addScopedLocal(name, type, declaration.name); // reports\r\n      } else {\r\n        currentFunction.addLocal(type, name); // reports\r\n      }\r\n      if (init) {\r\n        initializers.push(this.compileAssignmentWithValue(declaration.name, init));\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, false);\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 = makeIsTrueish(\r\n      this.compileExpression(statement.condition, Type.i32, ConversionKind.NONE),\r\n      this.currentType,\r\n      module\r\n    );\r\n\r\n    // Eliminate unnecesssary loops in generic contexts if the condition is constant\r\n    if (\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT) &&\r\n      _BinaryenExpressionGetId(condExpr = this.precomputeExpressionRef(condExpr)) == ExpressionId.Const &&\r\n      _BinaryenExpressionGetType(condExpr) == NativeType.I32\r\n    ) {\r\n      if (!_BinaryenConstGetValueI32(condExpr)) {\r\n        return module.createNop();\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 flow = currentFunction.flow.enterBranchOrScope();\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 alwaysReturns = false && flow.is(FlowFlags.RETURNS);\r\n    // TODO: evaluate possible always-true conditions\r\n\r\n    // Switch back to the parent flow\r\n    currentFunction.flow = flow.leaveBranchOrScope();\r\n    currentFunction.leaveBreakContext();\r\n\r\n    var expr = module.createBlock(breakLabel, [\r\n      module.createLoop(continueLabel,\r\n        module.createIf(condExpr, module.createBlock(null, [\r\n          body,\r\n          module.createBreak(continueLabel)\r\n        ], NativeType.None))\r\n      )\r\n    ], NativeType.None);\r\n\r\n    // If the loop is guaranteed to run and return, propagate that and append a hint\r\n    if (alwaysReturns) {\r\n      expr = module.createBlock(null, [\r\n        expr,\r\n        module.createUnreachable()\r\n      ]);\r\n    }\r\n    return expr;\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        );\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        );\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.F32: {\r\n        return this.module.createF32((<VariableLikeElement>element).constantFloatValue);\r\n      }\r\n      case TypeKind.F64: {\r\n        return this.module.createF64((<VariableLikeElement>element).constantFloatValue);\r\n      }\r\n      default: {\r\n        assert(false);\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          element.declaration.range\r\n        );\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 = ConversionKind.IMPLICIT,\r\n    wrapSmallIntegers: bool = true\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, wrapSmallIntegers);\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.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.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(\r\n          <ParenthesizedExpression>expression,\r\n          contextualType,\r\n          wrapSmallIntegers\r\n        );\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, wrapSmallIntegers);\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        expr = this.module.createUnreachable();\r\n        break;\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, expression);\r\n      this.currentType = contextualType;\r\n    }\r\n\r\n    if (this.options.sourceMap) {\r\n      addDebugLocation(expr, expression.range, this.module, this.currentFunction);\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  compileExpressionRetainType(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    wrapSmallIntegers: bool = true\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      wrapSmallIntegers\r\n    );\r\n  }\r\n\r\n  precomputeExpression(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    conversionKind: ConversionKind = ConversionKind.IMPLICIT\r\n  ): ExpressionRef {\r\n    return this.precomputeExpressionRef(this.compileExpression(expression, contextualType, conversionKind));\r\n  }\r\n\r\n  precomputeExpressionRef(expr: ExpressionRef): ExpressionRef {\r\n    var module = this.module;\r\n    var type = this.currentType;\r\n    var nativeType = type.toNativeType();\r\n    var typeRef = module.getFunctionTypeBySignature(nativeType, null);\r\n    var typeRefAdded = false;\r\n    if (!typeRef) {\r\n      typeRef = module.addFunctionType(type.toSignatureString(), nativeType, null);\r\n      typeRefAdded = true;\r\n    }\r\n    var funcRef = module.addFunction(\"__precompute\", typeRef, null, expr);\r\n    module.runPasses([ \"precompute\" ], funcRef);\r\n    var ret = _BinaryenFunctionGetBody(funcRef);\r\n    module.removeFunction(\"__precompute\");\r\n    if (typeRefAdded) {\r\n      // TODO: also remove the function type somehow if no longer used or make the C-API accept\r\n      // a `null` typeRef, using an implicit type.\r\n    }\r\n    return ret;\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    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      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) {\r\n      return module.createDrop(expr);\r\n    }\r\n\r\n    if (conversionKind == ConversionKind.IMPLICIT && !fromType.isAssignableTo(toType)) {\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    // TODO: make this a proper switch?\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              if (toType.is(TypeFlags.SMALL)) {\r\n                expr = makeSmallIntegerWrap(expr, toType, module);\r\n              }\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              if (toType.is(TypeFlags.SMALL)) {\r\n                expr = makeSmallIntegerWrap(expr, toType, module);\r\n              }\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              if (toType.is(TypeFlags.SMALL)) {\r\n                expr = makeSmallIntegerWrap(expr, toType, module);\r\n              }\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              if (toType.is(TypeFlags.SMALL)) {\r\n                expr = makeSmallIntegerWrap(expr, toType, module);\r\n              }\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      if (fromType.is(TypeFlags.LONG)) {\r\n\r\n        // i64 to i32\r\n        if (!toType.is(TypeFlags.LONG)) {\r\n          expr = module.createUnary(UnaryOp.WrapI64, expr); // discards upper bits\r\n          if (toType.is(TypeFlags.SMALL)) {\r\n            expr = makeSmallIntegerWrap(expr, toType, module);\r\n          }\r\n        }\r\n\r\n      // i32 to i64\r\n      } else if (toType.is(TypeFlags.LONG)) {\r\n        expr = module.createUnary(toType.is(TypeFlags.SIGNED) ? UnaryOp.ExtendI32 : UnaryOp.ExtendU32, expr);\r\n\r\n      // i32 or smaller to even smaller or same size int with change of sign\r\n      } else if (\r\n        toType.is(TypeFlags.SMALL) &&\r\n        (\r\n          fromType.size > toType.size ||\r\n          (\r\n            fromType.size == toType.size &&\r\n            fromType.is(TypeFlags.SIGNED) != toType.is(TypeFlags.SIGNED)\r\n          )\r\n        )\r\n      ) {\r\n        expr = makeSmallIntegerWrap(expr, toType, module);\r\n      }\r\n\r\n      // otherwise (smaller) i32/u32 to (same size) i32/u32\r\n    }\r\n\r\n    this.currentType = toType;\r\n    return expr;\r\n  }\r\n\r\n  compileAssertionExpression(expression: AssertionExpression, contextualType: Type): ExpressionRef {\r\n    var toType = this.program.resolveType( // reports\r\n      expression.toType,\r\n      this.currentFunction.contextualTypeArguments\r\n    );\r\n    if (!toType) return this.module.createUnreachable();\r\n    return this.compileExpression(expression.expression, toType, ConversionKind.EXPLICIT);\r\n  }\r\n\r\n  compileBinaryExpression(\r\n    expression: BinaryExpression,\r\n    contextualType: Type,\r\n    wrapSmallIntegers: bool = true\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 condExpr: ExpressionRef;\r\n    var expr: ExpressionRef;\r\n    var compound = false;\r\n    var possiblyOverflows = false;\r\n    var tempLocal: Local | null = null;\r\n\r\n    switch (expression.operator) {\r\n      case Token.LESSTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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        // TODO?\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);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.EXCLAMATION_EQUALS_EQUALS:\r\n        // TODO?\r\n      case Token.EXCLAMATION_EQUALS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true;\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true;\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true;\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\r\n          }\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(\r\n          left,\r\n          contextualType,\r\n          true // TODO: when can division remain unwrapped? does it overflow?\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true;\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: possiblyOverflows = true;\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.DivU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          true // TODO: when can remainder remain unwrapped? does it overflow?\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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            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.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.RemU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: { // TODO: check operator overload\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          case TypeKind.F64: {\r\n            // TODO: internal fmod, possibly simply imported from JS\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          false // ^\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: possiblyOverflows = true;\r\n          default: {\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: // TODO: check operator overload\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          case TypeKind.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          true // must wrap small integers\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          true // ^\r\n        );\r\n        switch (this.currentType.kind) {\r\n          default: {\r\n            // assumes signed shr on signed small integers does not overflow\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: // assumes unsigned shr on unsigned small integers does not overflow\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: { // TODO: check operator overload\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          case TypeKind.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          true // modifies low bits of small integers if unsigned\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          true // ^\r\n        );\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16: possiblyOverflows = true;\r\n          default: {\r\n            // assumes that unsigned shr on unsigned small integers does not overflow\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: // TODO: check operator overload\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.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true; // if left or right already did\r\n          default: {\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: // TODO: check operator overload\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.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true; // if left or right already did\r\n          default: {\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: // TODO: check operator overload\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.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true; // if left or right already did\r\n          default: {\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: // TODO: check operator overload\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.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          false\r\n        );\r\n\r\n        // clone left if free of side effects\r\n        expr = module.cloneExpression(leftExpr, true, 0);\r\n\r\n        // if not possible, tee left to a temp. local\r\n        if (!expr) {\r\n          tempLocal = this.currentFunction.getAndFreeTempLocal(this.currentType);\r\n          leftExpr = module.createTeeLocal(tempLocal.index, leftExpr);\r\n        }\r\n\r\n        possiblyOverflows = this.currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER);\r\n        condExpr = makeIsTrueish(leftExpr, this.currentType, module);\r\n\r\n        // simplify when cloning left without side effects was successful\r\n        if (expr) {\r\n          expr = module.createIf(\r\n            condExpr,  // left\r\n            rightExpr, //   ? right\r\n            expr       //   : cloned left\r\n          );\r\n        }\r\n\r\n        // otherwise make use of the temp. local\r\n        else {\r\n          expr = module.createIf(\r\n            condExpr,\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(\r\n          left,\r\n          contextualType\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          false\r\n        );\r\n\r\n        // clone left if free of side effects\r\n        expr = this.module.cloneExpression(leftExpr, true, 0);\r\n\r\n        // if not possible, tee left to a temp. local\r\n        if (!expr) {\r\n          tempLocal = this.currentFunction.getAndFreeTempLocal(this.currentType);\r\n          leftExpr = module.createTeeLocal(tempLocal.index, leftExpr);\r\n        }\r\n\r\n        possiblyOverflows = this.currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER); // if right did\r\n        condExpr = makeIsTrueish(leftExpr, this.currentType, module);\r\n\r\n        // simplify when cloning left without side effects was successful\r\n        if (expr) {\r\n          expr = this.module.createIf(\r\n            condExpr, // left\r\n            expr,      //   ? cloned left\r\n            rightExpr      //   : right\r\n          );\r\n        }\r\n\r\n        // otherwise make use of the temp. local\r\n        else {\r\n          expr = module.createIf(\r\n            condExpr,\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        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        expr = this.module.createUnreachable();\r\n        break;\r\n      }\r\n    }\r\n    if (possiblyOverflows && wrapSmallIntegers) {\r\n      assert(this.currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER)); // must be a small int\r\n      expr = makeSmallIntegerWrap(expr, this.currentType, module);\r\n    }\r\n    return compound\r\n      ? this.compileAssignmentWithValue(left, expr, contextualType != Type.void)\r\n      : expr;\r\n  }\r\n\r\n  compileAssignment(expression: Expression, valueExpression: Expression, contextualType: Type): ExpressionRef {\r\n    var currentFunction = this.currentFunction;\r\n    var resolved = this.program.resolveExpression(expression, currentFunction); // reports\r\n    if (!resolved) return this.module.createUnreachable();\r\n\r\n    // to compile just the value, we need to know the target's type\r\n    var element = resolved.element;\r\n    var elementType: Type;\r\n    switch (element.kind) {\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>element)) { // reports; not yet compiled if a static field compiled as a global\r\n          return this.module.createUnreachable();\r\n        }\r\n        assert((<Global>element).type != Type.void, \"concrete type expected\");\r\n        // fall-through\r\n      }\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        elementType = (<VariableLikeElement>element).type;\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let prototype = (<Property>element).setterPrototype;\r\n        if (prototype) {\r\n          let instance = prototype.resolve(); // reports\r\n          if (!instance) return this.module.createUnreachable();\r\n          assert(instance.signature.parameterTypes.length == 1);\r\n          elementType = 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>element).internalName\r\n        );\r\n        return this.module.createUnreachable();\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        if (expression.kind == NodeKind.ELEMENTACCESS) { // @operator(\"[]\")\r\n          if (resolved.target && resolved.target.kind == ElementKind.CLASS) {\r\n            if (element.simpleName == (<Class>resolved.target).prototype.fnIndexedGet) {\r\n              let resolvedIndexedSet = (<FunctionPrototype>element).resolve(null); // reports\r\n              if (resolvedIndexedSet) {\r\n                elementType = resolvedIndexedSet.signature.returnType;\r\n                break;\r\n              }\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n                expression.range, (<Class>resolved.target).toString()\r\n              );\r\n              return this.module.createUnreachable();\r\n            }\r\n          }\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    var valueExpr = this.compileExpression(valueExpression, elementType);\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 resolved = this.program.resolveExpression(expression, this.currentFunction); // reports\r\n    if (!resolved) return module.createUnreachable();\r\n\r\n    var element = resolved.element;\r\n    switch (element.kind) {\r\n      case ElementKind.LOCAL: {\r\n        this.currentType = tee ? (<Local>element).type : Type.void;\r\n        if ((<Local>element).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, (<Local>element).internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        return tee\r\n          ? module.createTeeLocal((<Local>element).index, valueWithCorrectType)\r\n          : module.createSetLocal((<Local>element).index, valueWithCorrectType);\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>element)) return module.createUnreachable();\r\n        let type = (<Global>element).type;\r\n        assert(type != Type.void);\r\n        this.currentType = tee ? type : Type.void;\r\n        if ((<Local>element).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            (<Local>element).internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        if (tee) {\r\n          let nativeType = type.toNativeType();\r\n          let internalName = (<Global>element).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((<Global>element).internalName, valueWithCorrectType);\r\n        }\r\n      }\r\n      case ElementKind.FIELD: {\r\n        if ((<Field>element).is(CommonFlags.READONLY)) {\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>element).internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        assert(resolved.isInstanceTarget);\r\n        let targetExpr = this.compileExpression(\r\n          <Expression>resolved.targetExpression,\r\n          (<Class>resolved.target).type\r\n        );\r\n        let type = (<Field>element).type;\r\n        this.currentType = tee ? type : Type.void;\r\n        let nativeType = type.toNativeType();\r\n        if (tee) {\r\n          let tempLocal = this.currentFunction.getAndFreeTempLocal(type);\r\n          let tempLocalIndex = tempLocal.index;\r\n          // TODO: simplify if valueWithCorrectType has no side effects\r\n          return module.createBlock(null, [\r\n            module.createSetLocal(tempLocalIndex, valueWithCorrectType),\r\n            module.createStore(\r\n              type.size >> 3,\r\n              targetExpr,\r\n              module.createGetLocal(tempLocalIndex, nativeType),\r\n              nativeType,\r\n              (<Field>element).memoryOffset\r\n            ),\r\n            module.createGetLocal(tempLocalIndex, nativeType)\r\n          ], nativeType);\r\n        } else {\r\n          return module.createStore(\r\n            type.size >> 3,\r\n            targetExpr,\r\n            valueWithCorrectType,\r\n            nativeType,\r\n            (<Field>element).memoryOffset\r\n          );\r\n        }\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let setterPrototype = (<Property>element).setterPrototype;\r\n        if (setterPrototype) {\r\n          let setterInstance = setterPrototype.resolve(); // reports\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              assert(resolved.isInstanceTarget);\r\n              let thisArg = this.compileExpression(\r\n                <Expression>resolved.targetExpression,\r\n                (<Class>resolved.target).type\r\n              );\r\n              return this.makeCallDirect(setterInstance, [ thisArg, 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>element).getterPrototype;\r\n          assert(getterPrototype != null); // must have one if there is a setter\r\n          let getterInstance = (<FunctionPrototype>getterPrototype).resolve(); // reports\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            assert(resolved.isInstanceTarget);\r\n            let thisArg = this.compileExpression(\r\n              <Expression>resolved.targetExpression,\r\n              (<Class>resolved.target).type\r\n            );\r\n            let tempLocal = this.currentFunction.getAndFreeTempLocal(returnType);\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, thisArg),\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, (<Property>element).internalName\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: { // @operator(\"[]\") ?\r\n        if (expression.kind == NodeKind.ELEMENTACCESS) {\r\n          assert(resolved.isInstanceTarget);\r\n          let getterInstance = (<FunctionPrototype>element).resolve(); // reports\r\n          if (!getterInstance) return module.createUnreachable();\r\n          // obtain @operator(\"[]=\")\r\n          let setElementName = (<Class>resolved.target).prototype.fnIndexedSet;\r\n          let setElement: Element | null;\r\n          if (\r\n            setElementName != null &&\r\n            (<Class>resolved.target).members &&\r\n            (setElement = (<Map<string,Element>>(<Class>resolved.target).members).get(setElementName)) &&\r\n            setElement.kind == ElementKind.FUNCTION_PROTOTYPE\r\n          ) {\r\n            let setterInstance = (<FunctionPrototype>setElement).resolve(); // reports\r\n            if (!setterInstance) return module.createUnreachable();\r\n            let targetType = (<Class>resolved.target).type;\r\n            let targetExpr = this.compileExpression(\r\n              <Expression>resolved.targetExpression,\r\n              targetType\r\n            );\r\n            let elementExpr = this.compileExpression(\r\n              (<ElementAccessExpression>expression).elementExpression,\r\n              Type.i32\r\n            );\r\n            if (tee) {\r\n              let tempLocalTarget = this.currentFunction.getTempLocal(targetType);\r\n              let tempLocalElement = this.currentFunction.getAndFreeTempLocal(this.currentType);\r\n              let returnType = getterInstance.signature.returnType;\r\n              this.currentFunction.freeTempLocal(tempLocalTarget);\r\n              return module.createBlock(null, [\r\n                this.makeCallDirect(setterInstance, [\r\n                  module.createTeeLocal(tempLocalTarget.index, targetExpr),\r\n                  module.createTeeLocal(tempLocalElement.index, elementExpr),\r\n                  valueWithCorrectType\r\n                ]),\r\n                this.makeCallDirect(getterInstance, [\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(setterInstance, [\r\n                targetExpr,\r\n                elementExpr,\r\n                valueWithCorrectType\r\n              ]);\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>resolved.target).internalName\r\n            );\r\n            return module.createUnreachable();\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 resolved = this.program.resolveExpression(expression.expression, currentFunction); // reports\r\n    if (!resolved) return module.createUnreachable();\r\n\r\n    var element = resolved.element;\r\n    var signature: Signature | null;\r\n    var indexArg: ExpressionRef;\r\n    switch (element.kind) {\r\n\r\n      // direct call: concrete function\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        let prototype = <FunctionPrototype>element;\r\n\r\n        // builtins are compiled on the fly\r\n        if (prototype.is(CommonFlags.AMBIENT | CommonFlags.BUILTIN)) {\r\n          let expr = compileBuiltinCall( // reports\r\n            this,\r\n            prototype,\r\n            prototype.resolveBuiltinTypeArguments(\r\n              expression.typeArguments,\r\n              currentFunction.contextualTypeArguments\r\n            ),\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 module.createUnreachable();\r\n          }\r\n          return expr;\r\n\r\n        // otherwise compile to a call\r\n        } else {\r\n          let instance = prototype.resolveUsingTypeArguments( // reports\r\n            expression.typeArguments,\r\n            currentFunction.contextualTypeArguments,\r\n            expression\r\n          );\r\n          if (!instance) return module.createUnreachable();\r\n          let thisArg: ExpressionRef = 0;\r\n          if (instance.is(CommonFlags.INSTANCE)) {\r\n            assert(resolved.isInstanceTarget);\r\n            thisArg = this.compileExpression(\r\n              <Expression>resolved.targetExpression,\r\n              (<Class>resolved.target).type\r\n            );\r\n            if (!thisArg) return module.createUnreachable();\r\n          } else {\r\n            assert(!resolved.isInstanceTarget);\r\n          }\r\n          return this.compileCallDirect(instance, expression.arguments, expression, thisArg);\r\n        }\r\n      }\r\n\r\n      // indirect call: index argument with signature\r\n      case ElementKind.LOCAL: {\r\n        if (signature = (<Local>element).type.functionType) {\r\n          indexArg = module.createGetLocal((<Local>element).index, NativeType.I32);\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>element).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (signature = (<Global>element).type.functionType) {\r\n          indexArg = module.createGetGlobal((<Global>element).internalName, (<Global>element).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>element).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.FIELD: {\r\n        let type = (<Field>element).type;\r\n        if (signature = type.functionType) {\r\n          let targetExpr = this.compileExpression(assert(resolved.targetExpression), type);\r\n          indexArg = module.createLoad(\r\n            4,\r\n            false,\r\n            targetExpr,\r\n            NativeType.I32,\r\n            (<Field>element).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, (<Field>element).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.FUNCTION_TARGET: {\r\n        signature = (<FunctionTarget>element).signature;\r\n        indexArg = this.compileExpression(expression.expression, (<FunctionTarget>element).type);\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: // TODO\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  /**\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  ): 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    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      );\r\n    }\r\n    assert(index == numArgumentsInclThis);\r\n    return this.makeCallDirect(instance, operands);\r\n  }\r\n\r\n  /** Gets the trampoline for the specified function. */\r\n  ensureTrampoline(original: Function): Function {\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.parameterTypes;\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 = maxOperands - minOperands;\r\n    assert(numOptional);\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    // append an additional parameter taking the number of optional arguments provided\r\n    var trampolineParameterTypes = new Array<Type>(maxArguments + 1);\r\n    for (let i = 0; i < maxArguments; ++i) {\r\n      trampolineParameterTypes[i] = originalParameterTypes[i];\r\n    }\r\n    trampolineParameterTypes[maxArguments] = Type.i32;\r\n\r\n    // create the trampoline element\r\n    var trampolineSignature = new Signature(trampolineParameterTypes, commonReturnType, commonThisType);\r\n    var trampolineName = originalName + \"|trampoline\";\r\n    trampolineSignature.requiredParameters = maxArguments + 1;\r\n    trampoline = new Function(original.prototype, trampolineName, trampolineSignature, original.memberOf);\r\n    trampoline.flags = original.flags;\r\n    trampoline.set(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. 'with0'\r\n    var names = new Array<string>(numNames);\r\n    for (let i = 0; i < numNames; ++i) {\r\n      let label = \"N=\" + i.toString();\r\n      names[i] = label;\r\n    }\r\n    var body = module.createBlock(names[0], [\r\n      module.createBlock(\"N=invalid\", [\r\n        module.createSwitch(names, \"N=invalid\",\r\n          module.createGetLocal(maxOperands, 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      body = module.createBlock(names[i + 1], [\r\n        body,\r\n        module.createSetLocal(operandIndex,\r\n          this.compileExpression(\r\n            assert(originalParameterDeclarations[minArguments + i].initializer),\r\n            type\r\n          )\r\n        )\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 typeRef = this.ensureFunctionType(trampolineSignature);\r\n    var funcRef = module.addFunction(trampolineName, typeRef, 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  /** Creates a direct call to the specified function. */\r\n  makeCallDirect(instance: Function, operands: ExpressionRef[] | null = null): 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    var module = this.module;\r\n    if (!this.compileFunction(instance)) return module.createUnreachable();\r\n    if (numOperands < maxOperands) {\r\n      instance = this.ensureTrampoline(instance);\r\n      if (!this.compileFunction(instance)) return module.createUnreachable();\r\n      if (!operands) {\r\n        operands = new Array(maxOperands + 1);\r\n        operands.length = 0;\r\n      }\r\n      for (let i = numArguments; i < maxArguments; ++i) {\r\n        operands.push(instance.signature.parameterTypes[i].toNativeZero(module));\r\n      }\r\n      operands.push(module.createI32(numOperands - minOperands));\r\n    }\r\n    var returnType = instance.signature.returnType;\r\n    this.currentType = returnType;\r\n    if (instance.is(CommonFlags.MODULE_IMPORT)) {\r\n      return module.createCallImport(instance.internalName, operands, returnType.toNativeType());\r\n    } else {\r\n      return module.createCall(instance.internalName, operands, returnType.toNativeType());\r\n    }\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      );\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(signature: Signature, indexArg: ExpressionRef, operands: ExpressionRef[]): ExpressionRef {\r\n    var returnType = signature.returnType;\r\n    this.currentType = returnType;\r\n    this.ensureFunctionType(signature);\r\n    return this.module.createCallIndirect(indexArg, operands, signature.toSignatureString());\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(expressions[i], Type.void);    // drop all\r\n    }\r\n    exprs[numExpressions] = this.compileExpression(expressions[numExpressions], contextualType); // except last\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 resolved = this.program.resolveElementAccess(expression, this.currentFunction); // reports\r\n    if (!resolved) return this.module.createUnreachable();\r\n\r\n    assert( // should be guaranteed by resolveElementAccess\r\n      resolved.element.kind == ElementKind.FUNCTION_PROTOTYPE &&\r\n      resolved.target &&\r\n      resolved.target.kind == ElementKind.CLASS\r\n    );\r\n    var target = <Class>resolved.target;\r\n    var instance = (<FunctionPrototype>resolved.element).resolve( // reports\r\n      null,\r\n      target.contextualTypeArguments\r\n    );\r\n    if (!instance) return this.module.createUnreachable();\r\n    var thisArg = this.compileExpression(expression.expression, target.type);\r\n    return this.compileCallDirect(instance, [\r\n      expression.elementExpression\r\n    ], expression, thisArg);\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 + \"~\" + simpleName,\r\n      declaration\r\n    );\r\n    var instance = this.compileFunctionUsingTypeArguments(\r\n      prototype,\r\n      [],\r\n      currentFunction.contextualTypeArguments,\r\n      declaration\r\n    );\r\n    if (!instance) return this.module.createUnreachable();\r\n    this.currentType = Type.u32.asFunction(instance.signature); // 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    // check special keywords first\r\n    switch (expression.kind) {\r\n      case NodeKind.NULL: {\r\n        let options = this.options;\r\n        if (!contextualType.classType) {\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 currentFunction = this.currentFunction;\r\n        if (currentFunction.is(CommonFlags.INSTANCE)) {\r\n          let parent = assert(currentFunction.memberOf);\r\n          assert(parent.kind == ElementKind.CLASS);\r\n          let thisType = (<Class>parent).type;\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 currentFunction = this.currentFunction;\r\n        if (currentFunction.is(CommonFlags.INSTANCE)) {\r\n          let parent = assert(currentFunction.memberOf);\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 resolved = this.program.resolveIdentifier( // reports\r\n      expression,\r\n      this.currentFunction,\r\n      this.currentEnum\r\n    );\r\n    if (!resolved) return module.createUnreachable();\r\n\r\n    var element = resolved.element;\r\n    switch (element.kind) {\r\n      case ElementKind.LOCAL: {\r\n        if ((<Local>element).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Local>element, contextualType, retainConstantType);\r\n        }\r\n        let localType = (<Local>element).type;\r\n        let localIndex = (<Local>element).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 (element.is(CommonFlags.AMBIENT | CommonFlags.BUILTIN)) {\r\n          return compileBuiltinGetConstant(this, <Global>element, expression);\r\n        }\r\n        if (!this.compileGlobal(<Global>element)) { // reports; not yet compiled if a static field\r\n          return this.module.createUnreachable();\r\n        }\r\n        let globalType = (<Global>element).type;\r\n        assert(globalType != Type.void);\r\n        if ((<Global>element).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Global>element, contextualType, retainConstantType);\r\n        }\r\n        this.currentType = globalType;\r\n        return this.module.createGetGlobal((<Global>element).internalName, globalType.toNativeType());\r\n      }\r\n      case ElementKind.ENUMVALUE: { // here: if referenced from within the same enum\r\n        if (!element.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>element).is(CommonFlags.INLINED)) {\r\n          return this.module.createI32((<EnumValue>element).constantValue);\r\n        }\r\n        return this.module.createGetGlobal((<EnumValue>element).internalName, NativeType.I32);\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        let instance = (<FunctionPrototype>element).resolve(\r\n          null,\r\n          this.currentFunction.contextualTypeArguments\r\n        );\r\n        if (!(instance && this.compileFunction(instance))) return module.createUnreachable();\r\n        let index = this.ensureFunctionTableEntry(instance);\r\n        this.currentType = Type.u32.asFunction(instance.signature);\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  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.classType;\r\n        if (\r\n          classType &&\r\n          classType.prototype == this.program.elementsLookup.get(\"Array\")\r\n        ) {\r\n          return this.compileStaticArray(\r\n            assert(classType.typeArguments)[0],\r\n            (<ArrayLiteralExpression>expression).elementExpressions,\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.I16: {\r\n            if (i64_is_i16(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.U8: {\r\n            if (i64_is_u8(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.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_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.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            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\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 {\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.compileStaticString((<StringLiteralExpression>expression).value);\r\n      }\r\n      // case LiteralKind.OBJECT:\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  compileStaticString(stringValue: string): ExpressionRef {\r\n    var module = this.module;\r\n    var options = this.options;\r\n    var stringSegments = this.stringSegments;\r\n\r\n    var stringSegment: MemorySegment | null = stringSegments.get(stringValue);\r\n    if (!stringSegment) {\r\n      let stringLength = stringValue.length;\r\n      let stringBuffer = new Uint8Array(4 + stringLength * 2);\r\n      stringBuffer[0] =  stringLength         & 0xff;\r\n      stringBuffer[1] = (stringLength >>>  8) & 0xff;\r\n      stringBuffer[2] = (stringLength >>> 16) & 0xff;\r\n      stringBuffer[3] = (stringLength >>> 24) & 0xff;\r\n      for (let i = 0; i < stringLength; ++i) {\r\n        stringBuffer[4 + i * 2] =  stringValue.charCodeAt(i)        & 0xff;\r\n        stringBuffer[5 + i * 2] = (stringValue.charCodeAt(i) >>> 8) & 0xff;\r\n      }\r\n      stringSegment = this.addMemorySegment(stringBuffer, options.usizeType.byteSize);\r\n      stringSegments.set(stringValue, stringSegment);\r\n    }\r\n    var stringOffset = stringSegment.offset;\r\n    var stringType = this.program.typesLookup.get(\"string\");\r\n    this.currentType = stringType ? stringType : options.usizeType;\r\n    if (options.isWasm64) {\r\n      return module.createI64(i64_low(stringOffset), i64_high(stringOffset));\r\n    }\r\n    assert(i64_is_i32(stringOffset));\r\n    return module.createI32(i64_low(stringOffset));\r\n  }\r\n\r\n  compileStaticArray(elementType: Type, expressions: (Expression | null)[], reportNode: Node): ExpressionRef {\r\n    var isStatic = true;\r\n    var module = this.module;\r\n\r\n    // obtain the array type\r\n    var arrayPrototype = assert(this.program.elementsLookup.get(\"Array\"));\r\n    if (!arrayPrototype || arrayPrototype.kind != ElementKind.CLASS_PROTOTYPE) return module.createUnreachable();\r\n    var arrayType = (<ClassPrototype>arrayPrototype).resolve([ elementType ]);\r\n    if (!arrayType) return module.createUnreachable();\r\n\r\n    var elementSize = expressions.length;\r\n    var nativeType = elementType.toNativeType();\r\n    var values: usize;\r\n    var memorySize: usize;\r\n    switch (nativeType) {\r\n      case NativeType.I32: {\r\n        values = changetype<usize>(new Int32Array(elementSize));\r\n        memorySize = elementSize * 4;\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        values = changetype<usize>(new Array<I64>(elementSize));\r\n        memorySize = elementSize * 8;\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        values = changetype<usize>(new Float32Array(elementSize));\r\n        memorySize = elementSize * 4;\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        values = changetype<usize>(new Float64Array(elementSize));\r\n        memorySize = elementSize * 8;\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          reportNode.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // precompute value expressions\r\n    var exprs = new Array<ExpressionRef>(elementSize);\r\n    var expr: BinaryenExpressionRef;\r\n    for (let i = 0; i < elementSize; ++i) {\r\n      exprs[i] = expressions[i]\r\n        ? this.compileExpression(<Expression>expressions[i], elementType)\r\n        : elementType.toNativeZero(module);\r\n      if (isStatic) {\r\n        expr = this.precomputeExpressionRef(exprs[i]);\r\n        if (_BinaryenExpressionGetId(expr) == ExpressionId.Const) {\r\n          assert(_BinaryenExpressionGetType(expr) == nativeType);\r\n          switch (nativeType) {\r\n            case NativeType.I32: {\r\n              changetype<i32[]>(values)[i] = _BinaryenConstGetValueI32(expr);\r\n              break;\r\n            }\r\n            case NativeType.I64: {\r\n              changetype<I64[]>(values)[i] = i64_new(\r\n                _BinaryenConstGetValueI64Low(expr),\r\n                _BinaryenConstGetValueI64High(expr)\r\n              );\r\n              break;\r\n            }\r\n            case NativeType.F32: {\r\n              changetype<f32[]>(values)[i] = _BinaryenConstGetValueF32(expr);\r\n              break;\r\n            }\r\n            case NativeType.F64: {\r\n              changetype<f64[]>(values)[i] = _BinaryenConstGetValueF64(expr);\r\n              break;\r\n            }\r\n            default: {\r\n              assert(false); // checked above\r\n            }\r\n          }\r\n        } else {\r\n          // TODO: emit a warning if declared 'const'\r\n          isStatic = false;\r\n        }\r\n      }\r\n    }\r\n\r\n    var usizeTypeSize = this.options.usizeType.byteSize;\r\n    var headerSize = usizeTypeSize + 4 + 4; // memory + capacity + length\r\n\r\n    if (isStatic) {\r\n      let buffer = new Uint8Array(headerSize + memorySize);\r\n      let segment = this.addMemorySegment(buffer);\r\n\r\n      // make header\r\n      let offset = 0;\r\n      if (usizeTypeSize == 8) {\r\n        writeI64(i64_add(segment.offset, i64_new(headerSize)), buffer, 0); // memory\r\n      } else {\r\n        assert(i64_high(segment.offset) == 0);\r\n        writeI32(i64_low(segment.offset) + headerSize, buffer, 0); // memory\r\n      }\r\n      offset += usizeTypeSize;\r\n      writeI32(elementSize, buffer, offset); // capacity\r\n      offset += 4;\r\n      writeI32(elementSize, buffer, offset); // length\r\n      offset += 4;\r\n      assert(offset == headerSize);\r\n\r\n      // make memory\r\n      switch (nativeType) {\r\n        case NativeType.I32: {\r\n          for (let i = 0; i < elementSize; ++i) {\r\n            writeI32(changetype<i32[]>(values)[i], buffer, offset); offset += 4;\r\n          }\r\n          break;\r\n        }\r\n        case NativeType.I64: {\r\n          for (let i = 0; i < elementSize; ++i) {\r\n            writeI64(changetype<I64[]>(values)[i], buffer, offset); offset += 8;\r\n          }\r\n          break;\r\n        }\r\n        case NativeType.F32: {\r\n          for (let i = 0; i < elementSize; ++i) {\r\n            writeF32(changetype<f32[]>(values)[i], buffer, offset); offset += 4;\r\n          }\r\n          break;\r\n        }\r\n        case NativeType.F64: {\r\n          for (let i = 0; i < elementSize; ++i) {\r\n            writeF64(changetype<f64[]>(values)[i], buffer, offset); offset += 8;\r\n          }\r\n          break;\r\n        }\r\n        default: {\r\n          assert(false);\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      assert(offset == headerSize + memorySize);\r\n      this.currentType = arrayType.type;\r\n      return usizeTypeSize == 8\r\n        ? module.createI64(\r\n            i64_low(segment.offset),\r\n            i64_high(segment.offset)\r\n          )\r\n        : module.createI32(\r\n            i64_low(segment.offset)\r\n          );\r\n    } else {\r\n      // TODO: static elements *could* go into data segments while dynamic ones are initialized\r\n      // on top? any benefits?\r\n      throw new Error(\"not implemented\");\r\n    }\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    var resolved = this.program.resolveExpression( // reports\r\n      expression.expression,\r\n      currentFunction\r\n    );\r\n    if (resolved) {\r\n      if (resolved.element.kind == ElementKind.CLASS_PROTOTYPE) {\r\n        let prototype = <ClassPrototype>resolved.element;\r\n        let instance = prototype.resolveUsingTypeArguments( // reports\r\n          expression.typeArguments,\r\n          null,\r\n          expression\r\n        );\r\n        if (instance) {\r\n          let thisExpr = compileBuiltinAllocate(this, instance, expression);\r\n          let initializers = new Array<ExpressionRef>();\r\n\r\n          // use a temp local for 'this'\r\n          let tempLocal = currentFunction.getTempLocal(options.usizeType);\r\n          initializers.push(module.createSetLocal(tempLocal.index, thisExpr));\r\n\r\n          // apply field initializers\r\n          if (instance.members) {\r\n            for (let member of instance.members.values()) {\r\n              if (member.kind == ElementKind.FIELD) {\r\n                let field = <Field>member;\r\n                let fieldDeclaration = field.prototype.declaration;\r\n                if (field.is(CommonFlags.CONST)) {\r\n                  assert(false); // there are no built-in fields currently\r\n                } else if (fieldDeclaration && fieldDeclaration.initializer) {\r\n                  initializers.push(module.createStore(field.type.byteSize,\r\n                    module.createGetLocal(tempLocal.index, options.nativeSizeType),\r\n                    this.compileExpression(fieldDeclaration.initializer, field.type),\r\n                    field.type.toNativeType(),\r\n                    field.memoryOffset\r\n                  ));\r\n                }\r\n              }\r\n            }\r\n          }\r\n\r\n          // apply constructor\r\n          let constructorInstance = instance.constructorInstance;\r\n          if (constructorInstance) {\r\n            initializers.push(this.compileCallDirect(constructorInstance, expression.arguments, expression,\r\n              module.createGetLocal(tempLocal.index, options.nativeSizeType)\r\n            ));\r\n          }\r\n\r\n          // return 'this'\r\n          initializers.push(module.createGetLocal(tempLocal.index, options.nativeSizeType));\r\n          currentFunction.freeTempLocal(tempLocal);\r\n          thisExpr = module.createBlock(null, initializers, options.nativeSizeType);\r\n\r\n          this.currentType = instance.type;\r\n          return thisExpr;\r\n        }\r\n      } else {\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      }\r\n    }\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  compileParenthesizedExpression(\r\n    expression: ParenthesizedExpression,\r\n    contextualType: Type,\r\n    wrapSmallIntegers: bool = true\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      wrapSmallIntegers\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 program = this.program;\r\n    var module = this.module;\r\n\r\n    var resolved = program.resolvePropertyAccess(propertyAccess, this.currentFunction); // reports\r\n    if (!resolved) return module.createUnreachable();\r\n\r\n    var element = resolved.element;\r\n    var targetExpr: ExpressionRef;\r\n    switch (element.kind) {\r\n      case ElementKind.GLOBAL: { // static property\r\n        if (element.is(CommonFlags.AMBIENT | CommonFlags.BUILTIN)) {\r\n          return compileBuiltinGetConstant(this, <Global>element, propertyAccess);\r\n        }\r\n        if (!this.compileGlobal(<Global>element)) { // reports; not yet compiled if a static field\r\n          return module.createUnreachable();\r\n        }\r\n        let globalType = (<Global>element).type;\r\n        assert(globalType != Type.void);\r\n        if ((<Global>element).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Global>element, contextualType, retainConstantType);\r\n        }\r\n        this.currentType = globalType;\r\n        return module.createGetGlobal((<Global>element).internalName, globalType.toNativeType());\r\n      }\r\n      case ElementKind.ENUMVALUE: { // enum value\r\n        if (!this.compileEnum((<EnumValue>element).enum)) {\r\n          return this.module.createUnreachable();\r\n        }\r\n        this.currentType = Type.i32;\r\n        if ((<EnumValue>element).is(CommonFlags.INLINED)) {\r\n          return module.createI32((<EnumValue>element).constantValue);\r\n        }\r\n        return module.createGetGlobal((<EnumValue>element).internalName, NativeType.I32);\r\n      }\r\n      case ElementKind.FIELD: { // instance field\r\n        assert(resolved.isInstanceTarget);\r\n        assert((<Field>element).memoryOffset >= 0);\r\n        targetExpr = this.compileExpression(\r\n          <Expression>resolved.targetExpression,\r\n          this.options.usizeType,\r\n          ConversionKind.NONE\r\n        );\r\n        this.currentType = (<Field>element).type;\r\n        return module.createLoad(\r\n          (<Field>element).type.size >> 3,\r\n          (<Field>element).type.is(TypeFlags.SIGNED | TypeFlags.INTEGER),\r\n          targetExpr,\r\n          (<Field>element).type.toNativeType(),\r\n          (<Field>element).memoryOffset\r\n        );\r\n      }\r\n      case ElementKind.PROPERTY: { // instance property (here: getter)\r\n        let prototype = (<Property>element).getterPrototype;\r\n        if (prototype) {\r\n          let instance = prototype.resolve(null); // reports\r\n          if (!instance) return 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            propertyAccess\r\n          )) {\r\n            return module.createUnreachable();\r\n          }\r\n          if (instance.is(CommonFlags.INSTANCE)) {\r\n            let parent = assert(instance.memberOf);\r\n            assert(parent.kind == ElementKind.CLASS);\r\n            targetExpr = this.compileExpression(\r\n              <Expression>resolved.targetExpression,\r\n              (<Class>parent).type\r\n            );\r\n            this.currentType = signature.returnType;\r\n            return this.compileCallDirect(instance, [], propertyAccess, targetExpr);\r\n          } else {\r\n            this.currentType = signature.returnType;\r\n            return this.compileCallDirect(instance, [], propertyAccess);\r\n          }\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.range, (<Property>element).simpleName, (<Property>element).parent.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\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  compileTernaryExpression(expression: TernaryExpression, contextualType: Type): ExpressionRef {\r\n    var ifThen = expression.ifThen;\r\n    var ifElse = expression.ifElse;\r\n\r\n    var condExpr = makeIsTrueish(\r\n      this.compileExpression(expression.condition, Type.u32, ConversionKind.NONE),\r\n      this.currentType,\r\n      this.module\r\n    );\r\n\r\n    // Eliminate unnecesssary branches in generic contexts if the condition is constant\r\n    if (\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT) &&\r\n      _BinaryenExpressionGetId(condExpr = this.precomputeExpressionRef(condExpr)) == ExpressionId.Const &&\r\n      _BinaryenExpressionGetType(condExpr) == NativeType.I32\r\n    ) {\r\n      return _BinaryenConstGetValueI32(condExpr)\r\n        ? this.compileExpression(ifThen, contextualType)\r\n        : this.compileExpression(ifElse, contextualType);\r\n    }\r\n\r\n    var ifThenExpr = this.compileExpression(ifThen, contextualType);\r\n    var ifElseExpr = this.compileExpression(ifElse, contextualType);\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(\r\n      expression.operand,\r\n      contextualType == Type.void\r\n        ? Type.i32\r\n        : contextualType,\r\n      ConversionKind.NONE,\r\n      false // wrapped below\r\n    );\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    var possiblyOverflows = false;\r\n\r\n    switch (expression.operator) {\r\n      case Token.PLUS_PLUS: {\r\n        if (currentType.isReference) {\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        switch (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: possiblyOverflows = true;\r\n          default: {\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          case TypeKind.VOID: {\r\n            assert(false);\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        break;\r\n      }\r\n      case Token.MINUS_MINUS: {\r\n        if (currentType.isReference) {\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        switch (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: possiblyOverflows = true;\r\n          default: {\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          case TypeKind.VOID: {\r\n            assert(false);\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        break;\r\n      }\r\n      default: {\r\n        assert(false);\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\r\n    var setValue: ExpressionRef;\r\n    var tempLocal: Local | null = null;\r\n\r\n    // simplify if dropped anyway\r\n    if (contextualType == Type.void) {\r\n      setValue = module.createBinary(op,\r\n        getValue,\r\n        nativeOne\r\n      );\r\n\r\n    // otherwise use a temp local for the intermediate value\r\n    } else {\r\n      tempLocal = currentFunction.getTempLocal(currentType);\r\n      setValue = module.createBinary(op,\r\n        this.module.createGetLocal(tempLocal.index, nativeType),\r\n        nativeOne\r\n      );\r\n    }\r\n\r\n    if (possiblyOverflows) {\r\n      assert(currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER));\r\n      setValue = makeSmallIntegerWrap(setValue, currentType, module);\r\n    }\r\n\r\n    setValue = this.compileAssignmentWithValue(expression.operand, setValue, false);\r\n    // ^ sets currentType = void\r\n    if (contextualType == Type.void) {\r\n      assert(!tempLocal);\r\n      return setValue;\r\n    }\r\n\r\n    this.currentType = assert(tempLocal).type;\r\n    currentFunction.freeTempLocal(<Local>tempLocal);\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);\r\n  }\r\n\r\n  compileUnaryPrefixExpression(\r\n    expression: UnaryPrefixExpression,\r\n    contextualType: Type,\r\n    wrapSmallIntegers: bool = true\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var currentType = this.currentType;\r\n\r\n    var possiblyOverflows = false;\r\n    var compound = false;\r\n    var expr: ExpressionRef;\r\n\r\n    switch (expression.operator) {\r\n      case Token.PLUS: {\r\n        if (currentType.isReference) {\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        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          false // wrapped below\r\n        );\r\n        currentType = this.currentType;\r\n        possiblyOverflows = currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER); // if operand already did\r\n        break;\r\n      }\r\n      case Token.MINUS: {\r\n        if (currentType.isReference) {\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        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          if (this.options.sourceMap) {\r\n            // compileExpression normally does this\r\n            addDebugLocation(expr, expression.range, module, this.currentFunction);\r\n          }\r\n          currentType = this.currentType;\r\n        } else {\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            false // wrapped below\r\n          );\r\n          currentType = this.currentType;\r\n          switch (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: possiblyOverflows = true; // or if operand already did\r\n            default: {\r\n              expr = module.createBinary(BinaryOp.SubI32, module.createI32(0), expr);\r\n              break;\r\n            }\r\n            case TypeKind.USIZE: {\r\n              if (currentType.isReference) {\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              // fall-through\r\n            }\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                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          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.PLUS_PLUS: {\r\n        if (currentType.isReference) {\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        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          false // wrapped below\r\n        );\r\n        currentType = this.currentType;\r\n        switch (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: possiblyOverflows = true; // or if operand already did\r\n          default: {\r\n            expr = module.createBinary(BinaryOp.AddI32, expr, this.module.createI32(1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            if (currentType.isReference) {\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            // fall-through\r\n          }\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              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        }\r\n        break;\r\n      }\r\n      case Token.MINUS_MINUS: {\r\n        if (currentType.isReference) {\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        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          false // wrapped below\r\n        );\r\n        currentType = this.currentType;\r\n        switch (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: possiblyOverflows = true; // or if operand already did\r\n          default: {\r\n            expr = module.createBinary(BinaryOp.SubI32, expr, module.createI32(1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            if (currentType.isReference) {\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            // fall-through\r\n          }\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              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        }\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          true // must wrap small integers\r\n        );\r\n        expr = makeIsFalseish(expr, this.currentType, module);\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.TILDE: {\r\n        if (currentType.isReference) {\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        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          contextualType == Type.void\r\n            ? ConversionKind.NONE\r\n            : ConversionKind.IMPLICIT,\r\n          false // retains low bits of small integers\r\n        );\r\n        currentType = this.currentType;\r\n        switch (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: possiblyOverflows = true; // or if operand already did\r\n          default: {\r\n            expr = module.createBinary(BinaryOp.XorI32, expr, module.createI32(-1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            if (currentType.isReference) {\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            // fall-through\r\n          }\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              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        }\r\n        break;\r\n      }\r\n      case Token.TYPEOF: {\r\n        // it might make sense to implement typeof in a way that a generic function can detect\r\n        // whether its type argument is a class type or string. that could then be used, for\r\n        // example, to generate hash codes for sets and maps, depending on the kind of type\r\n        // parameter we have. ideally the comparison would not involve actual string comparison and\r\n        // limit available operations to hard-coded string literals.\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        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    if (possiblyOverflows && wrapSmallIntegers) {\r\n      assert(currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER));\r\n      expr = makeSmallIntegerWrap(expr, currentType, module);\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\r\n// helpers\r\n\r\n/** Adds the debug location of the specified expression at the specified range to the source map. */\r\nfunction addDebugLocation(expr: ExpressionRef, range: Range, module: Module, currentFunction: Function): void {\r\n  var source = range.source;\r\n  if (source.debugInfoIndex < 0) {\r\n    source.debugInfoIndex = module.addDebugInfoFile(source.normalizedPath);\r\n  }\r\n  range.debugInfoRef = expr;\r\n  if (!currentFunction.debugLocations) currentFunction.debugLocations = [];\r\n  currentFunction.debugLocations.push(range);\r\n}\r\n\r\n/** Wraps a 32-bit integer expression so it evaluates to a valid value of the specified type. */\r\nexport function makeSmallIntegerWrap(expr: ExpressionRef, type: Type, module: Module): ExpressionRef {\r\n  switch (type.kind) {\r\n    case TypeKind.I8: {\r\n      return 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    case TypeKind.I16: {\r\n      return 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    case TypeKind.U8: {\r\n      return module.createBinary(BinaryOp.AndI32,\r\n        expr,\r\n        module.createI32(0xff)\r\n      );\r\n    }\r\n    case TypeKind.U16: {\r\n      return module.createBinary(BinaryOp.AndI32,\r\n        expr,\r\n        module.createI32(0xffff)\r\n      );\r\n    }\r\n    case TypeKind.BOOL: {\r\n      return module.createBinary(BinaryOp.AndI32,\r\n        expr,\r\n        module.createI32(0x1)\r\n      );\r\n    }\r\n    default: {\r\n      assert(false);\r\n      return expr;\r\n    }\r\n  }\r\n}\r\n\r\n/** Creates a comparison whether an expression is not 'true' in a broader sense. */\r\nexport function makeIsFalseish(expr: ExpressionRef, type: Type, module: Module): ExpressionRef {\r\n  switch (type.kind) {\r\n    default: { // any native i32\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    case TypeKind.VOID: {\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\nexport function makeIsTrueish(expr: ExpressionRef, type: Type, module: Module): ExpressionRef {\r\n  switch (type.kind) {\r\n    default: { // any native i32\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    case TypeKind.VOID: {\r\n      assert(false);\r\n      return module.createI32(0);\r\n    }\r\n  }\r\n}\r\n","/**\n * Generated from diagnosticsMessages.json. Do not edit.\n * @module diagnostics\n *//***/\n\n/* tslint:disable:max-line-length */\n\n/** Enum of available diagnostic codes. */\nexport enum DiagnosticCode {\n  Operation_not_supported = 100,\n  Operation_is_unsafe = 101,\n  Conversion_from_type_0_to_1_requires_an_explicit_cast = 200,\n  Conversion_from_type_0_to_1_will_require_an_explicit_cast_when_switching_between_32_64_bit = 201,\n  Type_0_cannot_be_changed_to_type_1 = 202,\n  Type_0_cannot_be_reinterpreted_as_type_1 = 203,\n  Basic_type_0_cannot_be_nullable = 204,\n  Cannot_export_a_mutable_global = 205,\n  Compiling_constant_with_non_constant_initializer_as_mutable = 206,\n  Structs_cannot_extend_classes_and_vice_versa = 207,\n  Structs_cannot_implement_interfaces = 208,\n  Invalid_regular_expression_flags = 209,\n  Implementation_0_must_match_the_signature_1 = 210,\n  Unterminated_string_literal = 1002,\n  Identifier_expected = 1003,\n  _0_expected = 1005,\n  A_file_cannot_have_a_reference_to_itself = 1006,\n  Trailing_comma_not_allowed = 1009,\n  Unexpected_token = 1012,\n  A_rest_parameter_must_be_last_in_a_parameter_list = 1014,\n  Parameter_cannot_have_question_mark_and_initializer = 1015,\n  A_required_parameter_cannot_follow_an_optional_parameter = 1016,\n  Enum_member_must_have_initializer = 1061,\n  Statements_are_not_allowed_in_ambient_contexts = 1036,\n  Initializers_are_not_allowed_in_ambient_contexts = 1039,\n  _0_modifier_cannot_be_used_here = 1042,\n  A_rest_parameter_cannot_be_optional = 1047,\n  A_rest_parameter_cannot_have_an_initializer = 1048,\n  A_set_accessor_must_have_exactly_one_parameter = 1049,\n  A_set_accessor_parameter_cannot_have_an_initializer = 1052,\n  A_get_accessor_cannot_have_parameters = 1054,\n  Type_parameters_cannot_appear_on_a_constructor_declaration = 1092,\n  Type_annotation_cannot_appear_on_a_constructor_declaration = 1093,\n  An_accessor_cannot_have_type_parameters = 1094,\n  A_set_accessor_cannot_have_a_return_type_annotation = 1095,\n  Type_parameter_list_cannot_be_empty = 1098,\n  A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement = 1104,\n  A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement = 1105,\n  A_return_statement_can_only_be_used_within_a_function_body = 1108,\n  Expression_expected = 1109,\n  Type_expected = 1110,\n  A_default_clause_cannot_appear_more_than_once_in_a_switch_statement = 1113,\n  Duplicate_label_0 = 1114,\n  Octal_literals_are_not_allowed_in_strict_mode = 1121,\n  Digit_expected = 1124,\n  Hexadecimal_digit_expected = 1125,\n  Unexpected_end_of_text = 1126,\n  Invalid_character = 1127,\n  _case_or_default_expected = 1130,\n  A_declare_modifier_cannot_be_used_in_an_already_ambient_context = 1038,\n  Type_argument_expected = 1140,\n  String_literal_expected = 1141,\n  Line_break_not_permitted_here = 1142,\n  Declaration_expected = 1146,\n  _const_declarations_must_be_initialized = 1155,\n  Unterminated_regular_expression_literal = 1161,\n  Binary_digit_expected = 1177,\n  Octal_digit_expected = 1178,\n  An_implementation_cannot_be_declared_in_ambient_contexts = 1183,\n  An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive = 1198,\n  Unterminated_Unicode_escape_sequence = 1199,\n  Decorators_are_not_valid_here = 1206,\n  _abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration = 1242,\n  A_class_may_only_extend_another_class = 1311,\n  Duplicate_identifier_0 = 2300,\n  Cannot_find_name_0 = 2304,\n  Module_0_has_no_exported_member_1 = 2305,\n  Generic_type_0_requires_1_type_argument_s = 2314,\n  Type_0_is_not_generic = 2315,\n  Type_0_is_not_assignable_to_type_1 = 2322,\n  Index_signature_is_missing_in_type_0 = 2329,\n  _this_cannot_be_referenced_in_current_location = 2332,\n  _super_can_only_be_referenced_in_a_derived_class = 2335,\n  Property_0_does_not_exist_on_type_1 = 2339,\n  Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures = 2349,\n  Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature = 2351,\n  A_function_whose_declared_type_is_not_void_must_return_a_value = 2355,\n  The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access = 2357,\n  The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access = 2364,\n  Operator_0_cannot_be_applied_to_types_1_and_2 = 2365,\n  _get_and_set_accessor_must_have_the_same_type = 2380,\n  Constructor_implementation_is_missing = 2390,\n  Function_implementation_is_missing_or_not_immediately_following_the_declaration = 2391,\n  Multiple_constructor_implementations_are_not_allowed = 2392,\n  Duplicate_function_implementation = 2393,\n  Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local = 2395,\n  The_0_operator_cannot_be_applied_to_type_1 = 2469,\n  Export_declaration_conflicts_with_exported_declaration_of_0 = 2484,\n  Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property = 2540,\n  The_target_of_an_assignment_must_be_a_variable_or_a_property_access = 2541,\n  Index_signature_in_type_0_only_permits_reading = 2542,\n  Expected_0_arguments_but_got_1 = 2554,\n  Expected_at_least_0_arguments_but_got_1 = 2555,\n  Expected_0_type_arguments_but_got_1 = 2558,\n  A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums = 2651,\n  Namespace_0_has_no_exported_member_1 = 2694,\n  File_0_not_found = 6054\n}\n\n/** Translates a diagnostic code to its respective string. */\nexport function diagnosticCodeToString(code: DiagnosticCode): string {\n  switch (code) {\n    case 100: return \"Operation not supported.\";\n    case 101: return \"Operation is unsafe.\";\n    case 200: return \"Conversion from type '{0}' to '{1}' requires an explicit cast.\";\n    case 201: return \"Conversion from type '{0}' to '{1}' will require an explicit cast when switching between 32/64-bit.\";\n    case 202: return \"Type '{0}' cannot be changed to type '{1}'.\";\n    case 203: return \"Type '{0}' cannot be reinterpreted as type '{1}'.\";\n    case 204: return \"Basic type '{0}' cannot be nullable.\";\n    case 205: return \"Cannot export a mutable global.\";\n    case 206: return \"Compiling constant with non-constant initializer as mutable.\";\n    case 207: return \"Structs cannot extend classes and vice-versa.\";\n    case 208: return \"Structs cannot implement interfaces.\";\n    case 209: return \"Invalid regular expression flags.\";\n    case 210: return \"Implementation '{0}' must match the signature '{1}'.\";\n    case 1002: return \"Unterminated string literal.\";\n    case 1003: return \"Identifier expected.\";\n    case 1005: return \"'{0}' expected.\";\n    case 1006: return \"A file cannot have a reference to itself.\";\n    case 1009: return \"Trailing comma not allowed.\";\n    case 1012: return \"Unexpected token.\";\n    case 1014: return \"A rest parameter must be last in a parameter list.\";\n    case 1015: return \"Parameter cannot have question mark and initializer.\";\n    case 1016: return \"A required parameter cannot follow an optional parameter.\";\n    case 1061: return \"Enum member must have initializer.\";\n    case 1036: return \"Statements are not allowed in ambient contexts.\";\n    case 1039: return \"Initializers are not allowed in ambient contexts.\";\n    case 1042: return \"'{0}' modifier cannot be used here.\";\n    case 1047: return \"A rest parameter cannot be optional.\";\n    case 1048: return \"A rest parameter cannot have an initializer.\";\n    case 1049: return \"A 'set' accessor must have exactly one parameter.\";\n    case 1052: return \"A 'set' accessor parameter cannot have an initializer.\";\n    case 1054: return \"A 'get' accessor cannot have parameters.\";\n    case 1092: return \"Type parameters cannot appear on a constructor declaration.\";\n    case 1093: return \"Type annotation cannot appear on a constructor declaration.\";\n    case 1094: return \"An accessor cannot have type parameters.\";\n    case 1095: return \"A 'set' accessor cannot have a return type annotation.\";\n    case 1098: return \"Type parameter list cannot be empty.\";\n    case 1104: return \"A 'continue' statement can only be used within an enclosing iteration statement.\";\n    case 1105: return \"A 'break' statement can only be used within an enclosing iteration or switch statement.\";\n    case 1108: return \"A 'return' statement can only be used within a function body.\";\n    case 1109: return \"Expression expected.\";\n    case 1110: return \"Type expected.\";\n    case 1113: return \"A 'default' clause cannot appear more than once in a 'switch' statement.\";\n    case 1114: return \"Duplicate label '{0}'.\";\n    case 1121: return \"Octal literals are not allowed in strict mode.\";\n    case 1124: return \"Digit expected.\";\n    case 1125: return \"Hexadecimal digit expected.\";\n    case 1126: return \"Unexpected end of text.\";\n    case 1127: return \"Invalid character.\";\n    case 1130: return \"'case' or 'default' expected.\";\n    case 1038: return \"A 'declare' modifier cannot be used in an already ambient context.\";\n    case 1140: return \"Type argument expected.\";\n    case 1141: return \"String literal expected.\";\n    case 1142: return \"Line break not permitted here.\";\n    case 1146: return \"Declaration expected.\";\n    case 1155: return \"'const' declarations must be initialized.\";\n    case 1161: return \"Unterminated regular expression literal.\";\n    case 1177: return \"Binary digit expected.\";\n    case 1178: return \"Octal digit expected.\";\n    case 1183: return \"An implementation cannot be declared in ambient contexts.\";\n    case 1198: return \"An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive.\";\n    case 1199: return \"Unterminated Unicode escape sequence.\";\n    case 1206: return \"Decorators are not valid here.\";\n    case 1242: return \"'abstract' modifier can only appear on a class, method, or property declaration.\";\n    case 1311: return \"A class may only extend another class.\";\n    case 2300: return \"Duplicate identifier '{0}'.\";\n    case 2304: return \"Cannot find name '{0}'.\";\n    case 2305: return \"Module '{0}' has no exported member '{1}'.\";\n    case 2314: return \"Generic type '{0}' requires {1} type argument(s).\";\n    case 2315: return \"Type '{0}' is not generic.\";\n    case 2322: return \"Type '{0}' is not assignable to type '{1}'.\";\n    case 2329: return \"Index signature is missing in type '{0}'.\";\n    case 2332: return \"'this' cannot be referenced in current location.\";\n    case 2335: return \"'super' can only be referenced in a derived class.\";\n    case 2339: return \"Property '{0}' does not exist on type '{1}'.\";\n    case 2349: return \"Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures.\";\n    case 2351: return \"Cannot use 'new' with an expression whose type lacks a construct signature.\";\n    case 2355: return \"A function whose declared type is not 'void' must return a value.\";\n    case 2357: return \"The operand of an increment or decrement operator must be a variable or a property access.\";\n    case 2364: return \"The left-hand side of an assignment expression must be a variable or a property access.\";\n    case 2365: return \"Operator '{0}' cannot be applied to types '{1}' and '{2}'.\";\n    case 2380: return \"'get' and 'set' accessor must have the same type.\";\n    case 2390: return \"Constructor implementation is missing.\";\n    case 2391: return \"Function implementation is missing or not immediately following the declaration.\";\n    case 2392: return \"Multiple constructor implementations are not allowed.\";\n    case 2393: return \"Duplicate function implementation.\";\n    case 2395: return \"Individual declarations in merged declaration '{0}' must be all exported or all local.\";\n    case 2469: return \"The '{0}' operator cannot be applied to type '{1}'.\";\n    case 2484: return \"Export declaration conflicts with exported declaration of '{0}'.\";\n    case 2540: return \"Cannot assign to '{0}' because it is a constant or a read-only property.\";\n    case 2541: return \"The target of an assignment must be a variable or a property access.\";\n    case 2542: return \"Index signature in type '{0}' only permits reading.\";\n    case 2554: return \"Expected {0} arguments, but got {1}.\";\n    case 2555: return \"Expected at least {0} arguments, but got {1}.\";\n    case 2558: return \"Expected {0} type arguments, but got {1}.\";\n    case 2651: return \"A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums.\";\n    case 2694: return \"Namespace '{0}' has no exported member '{1}'.\";\n    case 6054: return \"File '{0}' not found.\";\n    default: return \"\";\n  }\n}\n","/**\r\n * A TypeScript parser for the AssemblyScript subset.\r\n * @module parser\r\n *//***/\r\n\r\nimport {\r\n  Program,\r\n  CommonFlags,\r\n  LIBRARY_PREFIX,\r\n  PATH_DELIMITER\r\n} from \"./program\";\r\n\r\nimport {\r\n  Tokenizer,\r\n  Token,\r\n  Range,\r\n  CommentHandler\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\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  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  FunctionExpression,\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} from \"./ast\";\r\n\r\nconst builtinsFile = LIBRARY_PREFIX + \"builtins.ts\";\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  /** Log of source file names to be requested. */\r\n  backlog: string[] = new Array();\r\n  /** Log of source file names already processed. */\r\n  seenlog: 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 program = this.program;\r\n\r\n    // check if already parsed\r\n    var normalizedPath = normalizePath(path);\r\n    var sources = program.sources;\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      if (sources[i].normalizedPath == normalizedPath) return;\r\n    }\r\n    this.seenlog.add(normalizedPath);\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    sources.push(source);\r\n\r\n    // mark the special builtins library file\r\n    if (source.normalizedPath == builtinsFile) {\r\n      source.set(CommonFlags.BUILTIN);\r\n    }\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) break;\r\n      let name = decorator.name;\r\n      if (name.kind == NodeKind.IDENTIFIER) {\r\n        let text = (<IdentifierExpression>name).text;\r\n        if (text == \"global\") {\r\n          flags |= CommonFlags.GLOBAL;\r\n          continue;\r\n        }\r\n        if (text == \"unmananged\") {\r\n          flags |= CommonFlags.UNMANAGED;\r\n          continue;\r\n        }\r\n      }\r\n      if (!decorators) decorators = [];\r\n      decorators.push(decorator);\r\n    }\r\n\r\n    // mark builtins\r\n    flags |= (tn.source.flags & CommonFlags.BUILTIN);\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 (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        tn.next();\r\n        flags |= CommonFlags.ABSTRACT;\r\n        if (!tn.skip(Token.CLASS)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(tn.pos), \"class\"\r\n          );\r\n          break;\r\n        }\r\n        // fall through\r\n      }\r\n      case Token.CLASS: {\r\n        tn.next();\r\n        statement = this.parseClass(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.NAMESPACE: {\r\n        tn.next();\r\n        statement = this.parseNamespace(tn, flags, decorators, startPos);\r\n        decorators = null;\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: {\r\n        tn.next();\r\n        statement = this.parseTypeDeclaration(tn, flags, decorators, startPos);\r\n        decorators = null;\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    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    // 'void'\r\n    if (token == Token.VOID) {\r\n      return Node.createType(\r\n        Node.createIdentifierExpression(\"void\", tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n    }\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    // '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.skip(Token.IDENTIFIER)) {\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        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \")\"\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.skip(Token.IDENTIFIER)) {\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.skip(Token.IDENTIFIER)) {\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.skip(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    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    if (!tn.skip(Token.CLOSEBRACE)) {\r\n      do {\r\n        let member = this.parseEnumValue(tn, CommonFlags.NONE);\r\n        if (!member) return null;\r\n        members.push(<EnumValueDeclaration>member);\r\n      } while (tn.skip(Token.COMMA));\r\n      if (!tn.skip(Token.CLOSEBRACE)) {\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 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.skip(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    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    if (!tn.skip(Token.GREATERTHAN)) {\r\n      do {\r\n        let typeParameter = this.parseTypeParameter(tn);\r\n        if (!typeParameter) return null;\r\n        typeParameters.push(<TypeParameterNode>typeParameter);\r\n      } while (tn.skip(Token.COMMA));\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    } else {\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  parseParameters(\r\n    tn: Tokenizer\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\r\n    if (tn.peek() != Token.CLOSEPAREN) {\r\n      do {\r\n        let param = this.parseParameter(tn);\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      } while (tn.skip(Token.COMMA));\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    return parameters;\r\n  }\r\n\r\n  parseParameter(\r\n    tn: Tokenizer,\r\n    suppressErrors: bool = false\r\n  ): ParameterNode | null {\r\n\r\n    // before: '...'? Identifier '?'? (':' Type)? ('=' Expression)?\r\n\r\n    var isRest = false;\r\n    var isOptional = false;\r\n    var startRange: Range | null = null;\r\n    if (tn.skip(Token.DOT_DOT_DOT)) {\r\n      isRest = true;\r\n      startRange = tn.range();\r\n    }\r\n    if (tn.skip(Token.IDENTIFIER)) {\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      return 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    } 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.skip(Token.IDENTIFIER)) {\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\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      null,\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.skip(Token.IDENTIFIER)) {\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,\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  parseClass(\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':\r\n    //   Identifier\r\n    //   ('<' TypeParameters)?\r\n    //   ('extends' Type)?\r\n    //   ('implements' Type (',' Type)*)?\r\n    //   '{' ClassMember* '}'\r\n\r\n    if (!tn.skip(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\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 = new Array<TypeNode>();\r\n    if (tn.skip(Token.IMPLEMENTS)) {\r\n      do {\r\n        let type = this.parseType(tn);\r\n        if (!type) return null;\r\n        implementsTypes.push(<TypeNode>type);\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    if (!tn.skip(Token.CLOSEBRACE)) {\r\n      do {\r\n        let member = this.parseClassMember(tn, flags);\r\n        if (!member) return null;\r\n        members.push(<DeclarationStatement>member);\r\n      } while (!tn.skip(Token.CLOSEBRACE));\r\n    }\r\n    return 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\r\n  parseClassMember(\r\n    tn: Tokenizer,\r\n    parentFlags: CommonFlags\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\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      decorators.push(<DecoratorNode>decorator);\r\n    }\r\n\r\n    var flags = parentFlags & CommonFlags.AMBIENT; // inherit\r\n\r\n    if (tn.skip(Token.PUBLIC)) {\r\n      flags |= CommonFlags.PUBLIC;\r\n    } else if (tn.skip(Token.PRIVATE)) {\r\n      flags |= CommonFlags.PRIVATE;\r\n    } else if (tn.skip(Token.PROTECTED)) {\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      flags |= CommonFlags.STATIC;\r\n      staticStart = tn.tokenPos;\r\n      staticEnd = tn.pos;\r\n    } else {\r\n      if (tn.skip(Token.ABSTRACT)) {\r\n        flags |= (CommonFlags.ABSTRACT | CommonFlags.INSTANCE);\r\n        abstractStart = tn.tokenPos;\r\n        abstractEnd = tn.pos;\r\n      } else {\r\n        flags |= CommonFlags.INSTANCE;\r\n      }\r\n      if (parentFlags & 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 (tn.skip(Token.GET)) {\r\n      if (tn.peek(true, true) == 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, true) == 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    if (!isConstructor && !tn.skip(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\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);\r\n      if (!parameters) return null;\r\n\r\n      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        null,\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        }\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()\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.skip(Token.IDENTIFIER)) {\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    if (tn.skip(Token.OPENBRACE)) {\r\n      let members = new Array<ExportMember>();\r\n      if (!tn.skip(Token.CLOSEBRACE)) {\r\n        do {\r\n          let member = this.parseExportMember(tn);\r\n          if (!member) return null;\r\n          members.push(member);\r\n        } while (tn.skip(Token.COMMA));\r\n        if (!tn.skip(Token.CLOSEBRACE)) {\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      let path: StringLiteralExpression | null = null;\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      if (ret.normalizedPath && !this.seenlog.has(<string>ret.normalizedPath)) {\r\n        this.backlog.push(<string>ret.normalizedPath);\r\n        this.seenlog.add(<string>ret.normalizedPath);\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  parseExportMember(\r\n    tn: Tokenizer\r\n  ): ExportMember | null {\r\n\r\n    // before: Identifier ('as' Identifier)?\r\n\r\n    if (tn.skip(Token.IDENTIFIER)) {\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.skip(Token.IDENTIFIER)) {\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      if (!tn.skip(Token.CLOSEBRACE)) {\r\n        do {\r\n          let member = this.parseImportDeclaration(tn);\r\n          if (!member) return null;\r\n          members.push(member);\r\n        } while (tn.skip(Token.COMMA));\r\n        if (!tn.skip(Token.CLOSEBRACE)) {\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    } else if (tn.skip(Token.ASTERISK)) {\r\n      if (tn.skip(Token.AS)) {\r\n        if (tn.skip(Token.IDENTIFIER)) {\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        if (!this.seenlog.has(ret.normalizedPath)) {\r\n          this.backlog.push(ret.normalizedPath);\r\n          this.seenlog.add(ret.normalizedPath);\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.skip(Token.IDENTIFIER)) {\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.skip(Token.IDENTIFIER)) {\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.skip(Token.IDENTIFIER)) {\r\n      let asIdentifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      if (tn.skip(Token.EQUALS)) {\r\n        if (tn.skip(Token.IDENTIFIER)) {\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.TYPE: {\r\n        statement = this.parseTypeDeclaration(tn, CommonFlags.NONE, null, tn.tokenPos);\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      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        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(true);\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(true);\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.skip(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        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.skip(Token.IDENTIFIER)) {\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(true);\r\n    var startPos = tn.tokenPos;\r\n    var expr: Expression | null = null;\r\n\r\n    if (token == Token.NULL) {\r\n      return Node.createNullExpression(tn.range());\r\n    }\r\n    if (token == Token.TRUE) {\r\n      return Node.createTrueExpression(tn.range());\r\n    }\r\n    if (token == Token.FALSE) {\r\n      return Node.createFalseExpression(tn.range());\r\n    }\r\n\r\n    var p = determinePrecedenceStart(token);\r\n    if (p != Precedence.INVALID) {\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, p);\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    switch (token) {\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(true)) {\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        if (!tn.skip(Token.CLOSEBRACKET)) {\r\n          do {\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.peek() == Token.CLOSEBRACKET) break;\r\n          } while (tn.skip(Token.COMMA));\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        }\r\n        return Node.createArrayLiteralExpression(elementExpressions, 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      default: {\r\n        this.error(\r\n          DiagnosticCode.Expression_expected,\r\n          tn.range()\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      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    if (!tn.skip(Token.CLOSEPAREN)) {\r\n      do {\r\n        let expr = this.parseExpression(tn, Precedence.COMMA + 1);\r\n        if (!expr) return null;\r\n        args.push(expr);\r\n      } while (tn.skip(Token.COMMA));\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    return args;\r\n  }\r\n\r\n  parseExpression(\r\n    tn: Tokenizer,\r\n    precedence: Precedence = 0\r\n  ): Expression | null {\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 with type arguments\r\n    var typeArguments: CommonTypeNode[] | null;\r\n    while (\r\n      // there might be better ways to distinguish a LESSTHAN from a CALL with type arguments\r\n      (typeArguments = this.tryParseTypeArgumentsBeforeArguments(tn)) ||\r\n      tn.skip(Token.OPENPAREN)\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));\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);\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        // ElementAccessExpression\r\n        case Token.OPENBRACKET: {\r\n          next = this.parseExpression(tn);\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);\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.CLOSEBRACE     // current step should handle this\r\n      ) {\r\n        break;\r\n      }\r\n      if (nextToken == Token.SEMICOLON) { // end of the statement for sure\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  //   var depth = 0;\r\n  //   var token: Token;\r\n  //   do {\r\n  //     token = tn.next();\r\n  //     if (token == Token.OPENBRACE) {\r\n  //       ++depth;\r\n  //     } else if (token == Token.CLOSEBRACE) {\r\n  //       if (depth) --depth;\r\n  //       if (!depth) break; // done\r\n  //     }\r\n  //   } while (token != Token.ENDOFFILE);\r\n  // }\r\n}\r\n\r\n/** Operator precedence from least to largest. */\r\nexport const enum Precedence {\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  INVALID = -1\r\n}\r\n\r\n/** Determines the precedence of a starting token. */\r\nfunction determinePrecedenceStart(kind: Token): i32 {\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    default: return Precedence.INVALID;\r\n  }\r\n}\r\n\r\n/** Determines the precende of a non-starting token. */\r\nfunction determinePrecedence(kind: Token): i32 {\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    default: return Precedence.INVALID;\r\n  }\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","/**\r\n * Definition builders for WebIDL and TypeScript.\r\n * @module definitions\r\n *//***/\r\n\r\nimport {\r\n  Program,\r\n  Element,\r\n  CommonFlags,\r\n  ElementKind,\r\n  Global,\r\n  Enum,\r\n  EnumValue,\r\n  Function,\r\n  Class,\r\n  Namespace,\r\n  FunctionPrototype,\r\n  ClassPrototype,\r\n  ConstantValueKind,\r\n  Interface\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\r\n  /** Constructs a new Element walker. */\r\n  constructor(program: Program) {\r\n    this.program = program;\r\n  }\r\n\r\n  walk(): void {\r\n    for (let element of this.program.moduleLevelExports.values()) {\r\n      this.visitElement(element);\r\n    }\r\n  }\r\n\r\n  visitElement(element: Element): void {\r\n    switch (element.kind) {\r\n      case ElementKind.GLOBAL: {\r\n        if (element.is(CommonFlags.COMPILED)) {\r\n          this.visitGlobal(<Global>element);\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.ENUM: {\r\n        if (element.is(CommonFlags.COMPILED)) {\r\n          this.visitEnum(<Enum>element);\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        for (let instance of (<FunctionPrototype>element).instances.values()) {\r\n          if (instance.is(CommonFlags.COMPILED)) {\r\n            this.visitFunction(<Function>instance);\r\n          }\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          if (instance.is(CommonFlags.COMPILED)) {\r\n            this.visitClass(<Class>instance);\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.NAMESPACE: {\r\n        if ((<Namespace>element).is(CommonFlags.COMPILED)) {\r\n          this.visitNamespace(<Namespace>element);\r\n        }\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        break;\r\n      }\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 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 seen: Set<Element> = new Set();\r\n  private indentLevel: i32 = 0;\r\n\r\n  /** Constructs a new WebIDL builder. */\r\n  constructor(program: Program) {\r\n    super(program);\r\n  }\r\n\r\n  visitGlobal(element: Global): void {\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\r\n    var sb = this.sb;\r\n    var isConst = element.is(CommonFlags.INLINED);\r\n    indent(sb, this.indentLevel);\r\n    if (isConst) {\r\n      sb.push(\"const \");\r\n    }\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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) {\r\n            sb.push(\"const \");\r\n          } else {\r\n            sb.push(\"readonly \");\r\n          }\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) {\r\n          this.visitElement(member);\r\n        }\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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()) {\r\n        this.visitElement(member);\r\n      }\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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  visitNamespace(element: Namespace): void {\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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()) {\r\n        this.visitElement(member);\r\n      }\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 seen: Set<Element> = new Set();\r\n  private indentLevel: i32 = 0;\r\n\r\n  /** Constructs a new WebIDL builder. */\r\n  constructor(program: Program) {\r\n    super(program);\r\n  }\r\n\r\n  visitGlobal(element: Global): void {\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\r\n    var sb = this.sb;\r\n    var isConst = element.is(CommonFlags.INLINED);\r\n    indent(sb, this.indentLevel);\r\n    if (isConst) {\r\n      sb.push(\"const \");\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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          this.seen.add(member);\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) {\r\n        this.visitNamespace(element);\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\r\n    var sb = this.sb;\r\n    var signature = element.signature;\r\n    indent(sb, this.indentLevel);\r\n    sb.push(\"function \");\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(signature.getParameterName(i));\r\n      sb.push(\": \");\r\n      sb.push(this.typeToString(parameters[i]));\r\n    }\r\n    sb.push(\"): \");\r\n    sb.push(this.typeToString(signature.returnType));\r\n    sb.push(\";\\n\");\r\n    this.visitNamespace(element);\r\n  }\r\n\r\n  visitClass(element: Class): void {\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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)) {\r\n        sb.push(\"abstract \");\r\n      }\r\n      sb.push(\"class \");\r\n    }\r\n    sb.push(element.simpleName);\r\n    var base = element.base;\r\n    if (base) {\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      // TODO\r\n    }\r\n    members = element.members; // instance\r\n    if (members) {\r\n      // TODO\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  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()) {\r\n        this.visitElement(member);\r\n      }\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    return this.sb.join(\"\");\r\n  }\r\n}\r\n\r\n// TODO: C bindings? or is this sufficiently covered by WebIDL and using a 3rd-party tool?\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  readString\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 = readString(_BinaryenFunctionGetName(func)) || \"$\" + this.functionId.toString(10);\r\n    var body = _BinaryenFunctionGetBody(func);\r\n    this.push(\"function \");\r\n    this.push(name);\r\n    this.push(\"(\");\r\n     for (let i: Index = 0, k: Index = _BinaryenFunctionGetNumParams(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(_BinaryenFunctionGetParam(func, i)));\r\n    }\r\n    this.push(\"): \");\r\n    this.push(nativeTypeToType(_BinaryenFunctionGetResult(func)));\r\n    this.push(\" \");\r\n    if (_BinaryenExpressionGetId(body) != ExpressionId.Block) {\r\n      this.push(\"{\\n\");\r\n    }\r\n    this.decompileExpression(body);\r\n    if (_BinaryenExpressionGetId(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 = _BinaryenExpressionGetId(expr);\r\n    var type = _BinaryenExpressionGetType(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 = readString(_BinaryenBlockGetName(expr))) != null) {\r\n          this.push(string);\r\n          this.push(\": \");\r\n        }\r\n        this.push(\"{\\n\");\r\n        k = _BinaryenBlockGetNumChildren(expr);\r\n        for (i = 0; i < k; ++i) {\r\n          this.decompileExpression(_BinaryenBlockGetChild(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(_BinaryenIfGetCondition(expr));\r\n          this.push(\") \");\r\n          this.decompileExpression(_BinaryenIfGetIfTrue(expr));\r\n          if (nested = _BinaryenIfGetIfFalse(expr)) {\r\n            this.push(\" else \");\r\n            this.decompileExpression(nested);\r\n          }\r\n        } else {\r\n          this.decompileExpression(_BinaryenIfGetCondition(expr));\r\n          this.push(\" ? \");\r\n          this.decompileExpression(_BinaryenIfGetIfTrue(expr));\r\n          this.push(\" : \");\r\n          this.decompileExpression(_BinaryenIfGetIfFalse(expr));\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Loop: {\r\n        if ((string = readString(_BinaryenLoopGetName(expr))) != null) {\r\n          this.push(string);\r\n          this.push(\": \");\r\n        }\r\n        this.push(\"do \");\r\n        this.decompileExpression(_BinaryenLoopGetBody(expr));\r\n        this.push(\"while (0);\\n\");\r\n      }\r\n      case ExpressionId.Break: {\r\n        if (nested = _BinaryenBreakGetCondition(expr)) {\r\n          this.push(\"if (\");\r\n          this.decompileExpression(nested);\r\n          this.push(\") \");\r\n        }\r\n        if ((string = readString(_BinaryenBreakGetName(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(_BinaryenGetLocalGetIndex(expr).toString(10));\r\n        return;\r\n      }\r\n      case ExpressionId.SetLocal: {\r\n        this.push(\"$\");\r\n        this.push(_BinaryenSetLocalGetIndex(expr).toString(10));\r\n        this.push(\" = \");\r\n        this.decompileExpression(_BinaryenSetLocalGetValue(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(_BinaryenLoadGetOffset(expr).toString(10));\r\n        this.push(\" + \");\r\n        this.decompileExpression(_BinaryenLoadGetPtr(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(_BinaryenStoreGetOffset(expr).toString(10));\r\n        this.push(\" + \");\r\n        this.decompileExpression(_BinaryenStoreGetPtr(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(_BinaryenStoreGetValue(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(_BinaryenConstGetValueI32(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                  _BinaryenConstGetValueI64Low(expr),\r\n                  _BinaryenConstGetValueI64High(expr)\r\n                )\r\n              )\r\n            );\r\n            return;\r\n          }\r\n          case NativeType.F32: {\r\n            this.push(_BinaryenConstGetValueF32(expr).toString(10));\r\n            return;\r\n          }\r\n          case NativeType.F64: {\r\n            this.push(_BinaryenConstGetValueF64(expr).toString(10));\r\n            return;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ExpressionId.Unary: {\r\n        switch (_BinaryenUnaryGetOp(expr)) {\r\n          case UnaryOp.ClzI32: {\r\n            this.push(\"clz<i32>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.AbsF32: {\r\n            this.push(\"abs<f32>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ClzI64: {\r\n            this.push(\"clz<i64>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ExtendI32: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ExtendU32: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.WrapI64: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToI32: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToI64: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToU32: {\r\n            this.push(\"<i32><u32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToU64: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToI32: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToI64: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToU32: {\r\n            this.push(\"<i32><u32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToU64: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretF32: {\r\n            this.push(\"reinterpret<f32,i32>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI32ToF32: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI32ToF64: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU32ToF32: {\r\n            this.push(\"<f32><u32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU32ToF64: {\r\n            this.push(\"<f64><u32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI64ToF32: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI64ToF64: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU64ToF32: {\r\n            this.push(\"<f32><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU64ToF64: {\r\n            this.push(\"<f64><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.PromoteF32: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.DemoteF64: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretI32: {\r\n            this.push(\"reinterpret<i32,f32>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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 (_BinaryenBinaryGetOp(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" + \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" - \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" * \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" / \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivU32: {\r\n            this.push(\"<i32>(<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" / <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.RemI32:\r\n          case BinaryOp.RemI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" % \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RemU32: {\r\n            this.push(\"<i32>(<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" / <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.AndI32:\r\n          case BinaryOp.AndI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" & \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.OrI32:\r\n          case BinaryOp.OrI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" | \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.XorI32:\r\n          case BinaryOp.XorI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" ^ \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShlI32:\r\n          case BinaryOp.ShlI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" << \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShrU32:\r\n          case BinaryOp.ShrU64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >>> \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShrI32:\r\n          case BinaryOp.ShrI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >> \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RotlI32: {\r\n            this.push(\"rotl<i32>(\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" == \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" != \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" < \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LtU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" < <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" <= \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" <= <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" > \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" > <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >= \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >= <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" / <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RemU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" % <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RotlI64: {\r\n            this.push(\"rotl<i64>(\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.LtU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" < <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" <= <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" > <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >= <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.CopysignF32: {\r\n            this.push(\"copysign<f32>(\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenSelectGetIfTrue(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(_BinaryenSelectGetIfFalse(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(_BinaryenSelectGetCondition(expr));\r\n        this.push(\")\");\r\n        return;\r\n      }\r\n      case ExpressionId.Drop: {\r\n        this.decompileExpression(_BinaryenDropGetValue(expr));\r\n        this.push(\";\\n\");\r\n        return;\r\n      }\r\n      case ExpressionId.Return: {\r\n        if (nested = _BinaryenReturnGetValue(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 (_BinaryenHostGetOp(expr)) {\r\n          case HostOp.CurrentMemory: {\r\n            this.push(\"current_memory()\");\r\n            return;\r\n          }\r\n          case HostOp.GrowMemory: {\r\n            this.push(\"grow_memory(\");\r\n            this.decompileExpression(_BinaryenHostGetOperand(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 * 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} 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  LIBRARY_PREFIX\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) {\r\n    parser = new Parser();\r\n    isEntry = true;\r\n  }\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 `noMemory` option. */\r\nexport function setNoMemory(options: Options, noMemory: bool): void {\r\n  options.noMemory = noMemory;\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 `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/** 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 };\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","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","const Long = global.Long || require(\"long\");\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_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 util *//***/\r\n\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\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\nexport function writeF32(value: f32, buffer: Uint8Array, offset: i32): void {\r\n  writeI32(f32_as_i32(value), buffer, offset);\r\n}\r\n\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","/** @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\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\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","/**\r\n * Built-in elements providing WebAssembly core functionality.\r\n * @module builtins\r\n *//***/\r\n\r\nimport {\r\n  Compiler,\r\n  ConversionKind,\r\n\r\n  makeSmallIntegerWrap\r\n} from \"./compiler\";\r\n\r\nimport {\r\n  DiagnosticCode\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Node,\r\n  Expression\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} from \"./module\";\r\n\r\nimport {\r\n  ElementKind,\r\n  Global,\r\n  Local,\r\n  FunctionPrototype,\r\n  Class,\r\n  ClassPrototype\r\n} from \"./program\";\r\n\r\n/** Compiles a get of a built-in global. */\r\nexport function compileGetConstant(\r\n  compiler: Compiler,\r\n  global: Global,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  switch (global.internalName) {\r\n    case \"NaN\": { // context-sensitive\r\n      if (compiler.currentType == Type.f32) {\r\n        return compiler.module.createF32(NaN);\r\n      } else {\r\n        compiler.currentType = Type.f64;\r\n        return compiler.module.createF64(NaN);\r\n      }\r\n    }\r\n    case \"Infinity\": { // context-sensitive\r\n      if (compiler.currentType == Type.f32) {\r\n        return compiler.module.createF32(Infinity);\r\n      } else {\r\n        compiler.currentType = Type.f64;\r\n        return compiler.module.createF64(Infinity);\r\n      }\r\n    }\r\n    case \"HEAP_BASE\": { // never inlined for linking purposes\r\n      compiler.currentType = compiler.options.usizeType;\r\n      return compiler.module.createGetGlobal(\"HEAP_BASE\", compiler.currentType.toNativeType());\r\n    }\r\n  }\r\n  compiler.error(\r\n    DiagnosticCode.Operation_not_supported,\r\n    reportNode.range\r\n  );\r\n  return compiler.module.createUnreachable();\r\n}\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  var tempLocal0: Local,\r\n      tempLocal1: Local;\r\n\r\n  var type: Type,\r\n      offset: i32;\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\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\r\n      compiler.currentType = Type.bool;\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\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\r\n      compiler.currentType = Type.bool;\r\n      return type.is(TypeFlags.FLOAT)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isReference\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\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\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\r\n      compiler.currentType = Type.bool;\r\n      let classType = type.classType;\r\n      if (classType) {\r\n        let stringPrototype = compiler.program.elementsLookup.get(\"String\");\r\n        if (stringPrototype) {\r\n          assert(stringPrototype.kind == ElementKind.CLASS_PROTOTYPE);\r\n          let stringInstance = (<ClassPrototype>stringPrototype).resolve(null);\r\n          if (!stringInstance) return module.createUnreachable();\r\n          if (classType.isAssignableTo(stringInstance)) {\r\n            return module.createI32(1);\r\n          }\r\n        }\r\n      }\r\n      return module.createI32(0);\r\n    }\r\n    case \"isArray\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\r\n      compiler.currentType = Type.bool;\r\n      let classType = type.classType;\r\n      return classType != null && classType.prototype.fnIndexedGet != null\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n\r\n    // math\r\n\r\n    case \"isNaN\": { // isNaN<T?>(value: T) -> bool\r\n      compiler.currentType = Type.bool;\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.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 module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.F32: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f32);\r\n          ret = module.createBinary(BinaryOp.NeF32,\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createGetLocal(tempLocal0.index, NativeType.F32)\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f64);\r\n          ret = module.createBinary(BinaryOp.NeF64,\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createGetLocal(tempLocal0.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 = module.createUnreachable();\r\n          break;\r\n        }\r\n        default: { // every other type is never NaN\r\n          ret = module.createI32(0);\r\n          break;\r\n        }\r\n      }\r\n      compiler.currentType = Type.bool;\r\n      return ret;\r\n    }\r\n    case \"isFinite\": { // isFinite<T?>(value: T) -> bool\r\n      compiler.currentType = Type.bool;\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.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 module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.F32: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f32);\r\n          ret = module.createSelect(\r\n            module.createBinary(BinaryOp.NeF32,\r\n              module.createUnary(UnaryOp.AbsF32,\r\n                module.createTeeLocal(tempLocal0.index, arg0)\r\n              ),\r\n              module.createF32(Infinity)\r\n            ),\r\n            module.createI32(0),\r\n            module.createBinary(BinaryOp.EqF32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.F32),\r\n              module.createGetLocal(tempLocal0.index, NativeType.F32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f64);\r\n          ret = module.createSelect(\r\n            module.createBinary(BinaryOp.NeF64,\r\n              module.createUnary(UnaryOp.AbsF64,\r\n                module.createTeeLocal(tempLocal0.index, arg0)\r\n              ),\r\n              module.createF64(Infinity)\r\n            ),\r\n            module.createI32(0),\r\n            module.createBinary(BinaryOp.EqF64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.F64),\r\n              module.createGetLocal(tempLocal0.index, NativeType.F64)\r\n            )\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 = module.createUnreachable();\r\n          break;\r\n        }\r\n        default: { // every other type is always finite\r\n          ret = module.createI32(1);\r\n          break;\r\n        }\r\n      }\r\n      compiler.currentType = Type.bool;\r\n      return ret;\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        default: { // any integer up to 32-bits incl. bool\r\n          ret = module.createUnary(UnaryOp.ClzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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        case TypeKind.F32:\r\n        case TypeKind.F64:\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 \"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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        default: { // any integer up to 32-bits incl. bool\r\n          ret = module.createUnary(UnaryOp.CtzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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        case TypeKind.F32:\r\n        case TypeKind.F64:\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 \"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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        default: { // any integer up to 32-bits incl. bool\r\n          ret = module.createUnary(UnaryOp.PopcntI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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        case TypeKind.F32:\r\n        case TypeKind.F64:\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 \"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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\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 = makeSmallIntegerWrap(\r\n            module.createBinary(BinaryOp.RotlI32, arg0, arg1),\r\n            compiler.currentType,\r\n            module\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.isReference) {\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;\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\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 = makeSmallIntegerWrap(\r\n            module.createBinary(BinaryOp.RotrI32, arg0, arg1),\r\n            compiler.currentType,\r\n            module\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.isReference) {\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;\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n          // doesn't need sign-extension here because ifFalse below is either positive\r\n          // or MIN_VALUE (-MIN_VALUE == MIN_VALUE) if selected\r\n        case TypeKind.I32: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createBinary(BinaryOp.SubI32, // ifFalse\r\n              module.createI32(0),\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32)\r\n            ),\r\n            module.createBinary(BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createI32(0)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.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(tempLocal0.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(tempLocal0.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          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createBinary(BinaryOp.SubI64,\r\n              module.createI64(0, 0),\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n            ),\r\n            module.createBinary(BinaryOp.GtI64,\r\n              module.createGetLocal(tempLocal0.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.isReference) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i32);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i32);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\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          tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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.isReference) {\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          tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i32);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i32);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\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          tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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.isReference) {\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          tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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);\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);\r\n          ret = module.createUnary(UnaryOp.ReinterpretF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (typeArguments[0].isReference) {\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            );\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.u32);\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.u64);\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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(operands[0], compiler.options.usizeType);\r\n      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(operands[0], compiler.options.usizeType);\r\n      arg1 = compiler.compileExpression(\r\n        operands[1],\r\n        typeArguments[0],\r\n        typeArguments[0].is(TypeFlags.INTEGER)\r\n          ? ConversionKind.NONE // wraps a larger integer type to a smaller one, i.e. i32.store8\r\n          : ConversionKind.IMPLICIT\r\n      );\r\n      if (\r\n        compiler.currentType.is(TypeFlags.INTEGER) &&\r\n        typeArguments[0].is(TypeFlags.INTEGER) &&\r\n        typeArguments[0].size > compiler.currentType.size\r\n      ) {\r\n        arg1 = compiler.convertExpression(\r\n          arg1,\r\n          compiler.currentType, typeArguments[0],\r\n          ConversionKind.IMPLICIT,\r\n          operands[1]\r\n        );\r\n        type = typeArguments[0];\r\n      } else {\r\n        type = compiler.currentType;\r\n      }\r\n      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) {\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        ret = compiler.options.isWasm64\r\n          ? module.createI64(typeArguments[0].byteSize, 0)\r\n          : module.createI32(typeArguments[0].byteSize);\r\n      } else {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      return ret;\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], type = compiler.currentType);\r\n      arg2 = compiler.compileExpression(operands[2], Type.bool);\r\n      compiler.currentType = type;\r\n      switch (compiler.currentType.kind) {\r\n        default: { // any 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 \"current_memory\": { // current_memory() -> 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 \"grow_memory\": { // grow_memory(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);\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 \"move_memory\": { // move_memory(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(operands[0], compiler.options.usizeType);\r\n      arg1 = compiler.compileExpression(operands[1], compiler.options.usizeType);\r\n      arg2 = compiler.compileExpression(operands[2], compiler.options.usizeType);\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 \"set_memory\": { // set_memory(dest: usize, value: u32, 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(operands[0], compiler.options.usizeType);\r\n      arg1 = compiler.compileExpression(operands[1], Type.u32);\r\n      arg2 = compiler.compileExpression(operands[2], compiler.options.usizeType);\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      } else if (typeArguments[0].kind != TypeKind.USIZE) { // any usize\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      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.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.NONE\r\n      );\r\n      compiler.currentType = typeArguments[0];\r\n      if (compiler.currentType.kind != TypeKind.USIZE) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpressionRetainType(operands[0], Type.i32);\r\n      }\r\n\r\n      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          default: { // any integer up to 32-bits incl. bool\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI32,\r\n                module.createTeeLocal(tempLocal0.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI64,\r\n                module.createTeeLocal(tempLocal0.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE:\r\n          case TypeKind.USIZE: {\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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(tempLocal0.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f32);\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF32,\r\n                module.createTeeLocal(tempLocal0.index, arg0),\r\n                module.createF32(0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.index, NativeType.F32)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f64);\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF64,\r\n                module.createTeeLocal(tempLocal0.index, arg0),\r\n                module.createF64(0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.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\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(operands[0], Type.i8, ConversionKind.EXPLICIT);\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(operands[0], Type.i16, ConversionKind.EXPLICIT);\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(operands[0], Type.i32, ConversionKind.EXPLICIT);\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(operands[0], Type.i64, ConversionKind.EXPLICIT);\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      );\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(operands[0], Type.u8, ConversionKind.EXPLICIT);\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(operands[0], Type.u16, ConversionKind.EXPLICIT);\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(operands[0], Type.u32, ConversionKind.EXPLICIT);\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(operands[0], Type.u64, ConversionKind.EXPLICIT);\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      );\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(operands[0], Type.bool, ConversionKind.EXPLICIT);\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(operands[0], Type.f32, ConversionKind.EXPLICIT);\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(operands[0], Type.f64, ConversionKind.EXPLICIT);\r\n    }\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\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);\r\n    if (\r\n      _BinaryenExpressionGetId(expr) != ExpressionId.Const ||\r\n      _BinaryenExpressionGetType(expr) != NativeType.I64 ||\r\n      _BinaryenConstGetValueI64High(expr) != 0 ||\r\n      (value = _BinaryenConstGetValueI64Low(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);\r\n    if (\r\n      _BinaryenExpressionGetId(expr) != ExpressionId.Const ||\r\n      _BinaryenExpressionGetType(expr) != NativeType.I32 ||\r\n      (value = _BinaryenConstGetValueI32(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\nconst allocateInternalName = \"allocate_memory\";\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  cls: Class,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var program = compiler.program;\r\n  assert(cls.program == program);\r\n  var module = compiler.module;\r\n  var options = compiler.options;\r\n\r\n  var prototype = program.elementsLookup.get(allocateInternalName);\r\n  if (!prototype) {\r\n    program.error(\r\n      DiagnosticCode.Cannot_find_name_0,\r\n      reportNode.range, allocateInternalName\r\n    );\r\n    return module.createUnreachable();\r\n  }\r\n  if (prototype.kind != ElementKind.FUNCTION_PROTOTYPE) {\r\n    program.error(\r\n      DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n      reportNode.range, prototype.internalName\r\n    );\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  var instance = (<FunctionPrototype>prototype).resolve(); // reports\r\n  if (!(instance && compiler.compileFunction(instance))) return module.createUnreachable();\r\n\r\n  compiler.currentType = cls.type;\r\n  return module.createCall(\r\n    instance.internalName, [\r\n      options.isWasm64\r\n        ? module.createI64(cls.currentMemoryOffset)\r\n        : module.createI32(cls.currentMemoryOffset)\r\n    ],\r\n    options.nativeSizeType\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\"); // might be intended\r\n  if (!stringType) return module.createUnreachable();\r\n\r\n  var abortPrototype = program.elementsLookup.get(\"abort\"); // might be intended\r\n  if (!abortPrototype || abortPrototype.kind != ElementKind.FUNCTION_PROTOTYPE) return module.createUnreachable();\r\n\r\n  var abortInstance = (<FunctionPrototype>abortPrototype).resolve(); // reports\r\n  if (!(abortInstance && compiler.compileFunction(abortInstance))) return module.createUnreachable();\r\n\r\n  var messageArg = message != null\r\n    ? compiler.compileExpression(message, stringType)\r\n    : stringType.toNativeZero(module);\r\n\r\n  var filenameArg = compiler.compileStaticString(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","module.exports = __WEBPACK_EXTERNAL_MODULE__22__;","// Copy Binaryen exports to global scope\r\n\r\nconst binaryen = global.Binaryen || require(\"binaryen\");\r\n\r\nfor (var key in binaryen)\r\n  if (key.startsWith(\"_Binaryen\") || key.startsWith(\"_Relooper\"))\r\n    global[key] = binaryen[key];\r\n\r\n// Utilize Binaryen's heap\r\n\r\nglobal.allocate_memory = function(size) {\r\n  if (!size) return 0; // should be safe in our case\r\n  return binaryen._malloc(size);\r\n};\r\n\r\nglobal.free_memory = function(ptr) {\r\n  if (ptr) binaryen._free(ptr);\r\n};\r\n\r\nglobal.move_memory = function(dest, src, n) {\r\n  return binaryen._memmove(dest, src, n);\r\n};\r\n\r\nglobal.store = function(ptr, val) {\r\n  binaryen.HEAPU8[ptr] = val;\r\n};\r\n\r\nglobal.load = function(ptr) {\r\n  return binaryen.HEAPU8[ptr];\r\n};\r\n\r\n// Implement module stubs\r\n\r\nconst Module = require(\"../../module\").Module;\r\n\r\nModule.prototype.toText = function toText() {\r\n  var previousPrint = binaryen.print;\r\n  var ret = \"\";\r\n  binaryen.print = function(x) { ret += x + \"\\n\" };\r\n  _BinaryenModulePrint(this.ref);\r\n  binaryen.print = previousPrint;\r\n  return ret;\r\n};\r\n\r\nModule.prototype.toAsmjs = function toAsmjs() {\r\n  var previousPrint = binaryen.print;\r\n  var ret = \"\";\r\n  binaryen.print = function(x) { ret += x + \"\\n\" };\r\n  _BinaryenModulePrintAsmjs(this.ref);\r\n  binaryen.print = previousPrint;\r\n  return ret;\r\n};\r\n","var globalScope = typeof window !== \"undefined\" && window || typeof global !== \"undefined\" && global || self;\r\n\r\nvar HEAP = new Uint8Array(0);\r\nvar HEAP_OFFSET = 0;\r\n\r\nglobalScope[\"allocate_memory\"] = function allocate_memory(size) {\r\n  if (!(size >>>= 0))\r\n    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)\r\n    HEAP_OFFSET = (HEAP_OFFSET | 7) + 1;\r\n  return ptr;\r\n};\r\n\r\nglobalScope[\"free_memory\"] = function free_memory(ptr) {\r\n  // TODO\r\n};\r\n\r\nglobalScope[\"move_memory\"] = function move_memory(dest, src, n) {\r\n  HEAP.copyWithin(dest, src, src + n);\r\n};\r\n\r\nglobalScope[\"store\"] = function store(ptr, val, off) {\r\n  if (typeof off === \"number\")\r\n    ptr += off;\r\n  HEAP[ptr] = val;\r\n};\r\n\r\nglobalScope[\"load\"] = function load(ptr) {\r\n  if (typeof off === \"number\")\r\n    ptr += off;\r\n  return HEAP[ptr];\r\n};\r\n","/** @module std/portable *//***/\r\n\r\nvar globalScope = typeof window !== \"undefined\" && window || typeof global !== \"undefined\" && global || self;\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[\"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\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[\"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\nrequire(\"./portable/memory\");\r\n","/**\r\n * JavaScript glue code.\r\n * @module glue/js\r\n * @preferred\r\n *//***/\r\n\r\nimport \"../../../std/portable\";\r\nimport \"./binaryen\";\r\nimport \"./i64\";\r\nimport \"./float\";\r\n"],"sourceRoot":""}
\ No newline at end of file
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webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory(require(\"binaryen\"));\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine([\"binaryen\"], factory);\n\telse if(typeof exports === 'object')\n\t\texports[\"assemblyscript\"] = factory(require(\"binaryen\"));\n\telse\n\t\troot[\"assemblyscript\"] = factory(root[\"binaryen\"]);\n})(typeof self !== 'undefined' ? self : this, function(__WEBPACK_EXTERNAL_MODULE__22__) {\nreturn "," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__webpack_require__.r = function(exports) {\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 27);\n","/**\r\n * AssemblyScript's intermediate representation describing a program's elements.\r\n * @module program\r\n *//***/\r\n\r\nimport {\r\n  Options\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  Signature,\r\n\r\n  typesToString\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  TypeNode,\r\n  TypeParameterNode,\r\n  // ParameterNode,\r\n  // ParameterKind,\r\n  // SignatureNode,\r\n  DecoratorNode,\r\n  DecoratorKind,\r\n\r\n  Expression,\r\n  AssertionExpression,\r\n  ElementAccessExpression,\r\n  IdentifierExpression,\r\n  LiteralExpression,\r\n  LiteralKind,\r\n  ParenthesizedExpression,\r\n  PropertyAccessExpression,\r\n  StringLiteralExpression,\r\n  CallExpression,\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  VariableLikeDeclarationStatement,\r\n  VariableStatement,\r\n\r\n  ParameterKind,\r\n  SignatureNode\r\n} from \"./ast\";\r\n\r\nimport {\r\n  Module,\r\n  NativeType,\r\n  FunctionRef,\r\n} from \"./module\";\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/** 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\r\n/** Represents a yet unresolved export. */\r\nclass QueuedExport {\r\n  isReExport: bool;\r\n  referencedName: string;\r\n  member: ExportMember;\r\n}\r\n\r\n/** Represents a yet unresolved import. */\r\nclass QueuedImport {\r\n  internalName: string;\r\n  referencedName: string;\r\n  referencedNameAlt: string;\r\n  declaration: ImportDeclaration;\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\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  /** Diagnostic offset used where repeatedly obtaining the next diagnostic. */\r\n  diagnosticsOffset: i32 = 0;\r\n  /** Compiler options. */\r\n  options: Options;\r\n  /** Elements by internal name. */\r\n  elementsLookup: 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,Element> = new Map();\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.sources = [];\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    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    var queuedExports = new Map<string,QueuedExport>();\r\n    var queuedImports = new Array<QueuedImport>();\r\n    var queuedDerivedClasses = 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      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, queuedDerivedClasses);\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, queuedDerivedClasses);\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 element = this.tryResolveImport(queuedImport.referencedName, queuedExports);\r\n      if (element) {\r\n        this.elementsLookup.set(queuedImport.internalName, element);\r\n        queuedImports.splice(i, 1);\r\n      } else {\r\n        if (element = this.tryResolveImport(queuedImport.referencedNameAlt, queuedExports)) {\r\n          this.elementsLookup.set(queuedImport.internalName, 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            queuedImport.declaration.range,\r\n            (<ImportStatement>queuedImport.declaration.parent).path.value,\r\n            queuedImport.declaration.externalName.text\r\n          );\r\n          ++i;\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.referencedName)) {\r\n            this.setExportAndCheckLibrary(\r\n              exportName,\r\n              element,\r\n              currentExport.member.externalName\r\n            );\r\n            break;\r\n          }\r\n          currentExport = queuedExports.get(currentExport.referencedName);\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.referencedName)) ||\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              currentExport.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    for (let i = 0, k = queuedDerivedClasses.length; i < k; ++i) {\r\n      let derivedDeclaration = queuedDerivedClasses[i].declaration;\r\n      let derivedType = assert(derivedDeclaration.extendsType);\r\n      let resolved = this.resolveIdentifier(derivedType.name, null);\r\n      if (resolved) {\r\n        if (resolved.element.kind != ElementKind.CLASS_PROTOTYPE) {\r\n          this.error(\r\n            DiagnosticCode.A_class_may_only_extend_another_class,\r\n            derivedType.range\r\n          );\r\n          continue;\r\n        }\r\n        queuedDerivedClasses[i].basePrototype = (\r\n          <ClassPrototype>resolved.element\r\n        );\r\n      }\r\n    }\r\n  }\r\n\r\n  /** Tries to resolve an import by traversing exports and queued exports. */\r\n  private tryResolveImport(\r\n    referencedName: string,\r\n    queuedExports: 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(referencedName)) return element;\r\n      let queuedExport = queuedExports.get(referencedName);\r\n      if (!queuedExport) return null;\r\n      if (queuedExport.isReExport) {\r\n        referencedName = queuedExport.referencedName;\r\n        continue;\r\n      }\r\n      return this.elementsLookup.get(queuedExport.referencedName);\r\n    } while (true);\r\n  }\r\n\r\n  /** Processes internal decorators, if present. */\r\n  private checkInternalDecorators(\r\n    element: Element,\r\n    declaration: DeclarationStatement\r\n  ): void {\r\n    var parentNode = declaration.parent;\r\n    if (\r\n      element.is(CommonFlags.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 simpleName = declaration.name.text;\r\n      if (this.elementsLookup.has(simpleName)) {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, element.internalName\r\n        );\r\n      } else {\r\n        element.set(CommonFlags.GLOBAL);\r\n        this.elementsLookup.set(simpleName, element);\r\n        if (element.is(CommonFlags.BUILTIN)) {\r\n          element.internalName = simpleName;\r\n        }\r\n      }\r\n    }\r\n  }\r\n\r\n  private initializeClass(\r\n    declaration: ClassDeclaration,\r\n    queuedDerivedClasses: 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    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    );\r\n    prototype.namespace = namespace;\r\n    this.elementsLookup.set(internalName, prototype);\r\n\r\n    var implementsTypes = declaration.implementsTypes;\r\n    var numImplementsTypes = implementsTypes.length;\r\n    if (prototype.is(CommonFlags.UNMANAGED)) {\r\n      if (implementsTypes && numImplementsTypes) {\r\n        this.error(\r\n          DiagnosticCode.Structs_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    } else if (numImplementsTypes) {\r\n      for (let i = 0; i < numImplementsTypes; ++i) {\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          implementsTypes[i].range\r\n        );\r\n      }\r\n    }\r\n\r\n    // remember classes that extend another one\r\n    if (declaration.extendsType) {\r\n      queuedDerivedClasses.push(prototype);\r\n    }\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)) {\r\n        if (prototype.is(CommonFlags.EXPORT)) {\r\n          prototype.set(CommonFlags.MODULE_EXPORT);\r\n        }\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      if (prototype.is(CommonFlags.EXPORT) && declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, prototype);\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          throw new Error(\"class member expected\");\r\n        }\r\n      }\r\n    }\r\n\r\n    this.checkInternalDecorators(prototype, declaration);\r\n\r\n    // check and possibly register string type\r\n    if (\r\n      prototype.is(CommonFlags.GLOBAL) &&\r\n      declaration.name.text == \"String\"\r\n    ) {\r\n      if (!this.typesLookup.has(\"string\")) {\r\n        let instance = prototype.resolve(null);\r\n        if (instance) this.typesLookup.set(\"string\", instance.type);\r\n      } else {\r\n        this.error(\r\n          DiagnosticCode.Duplicate_identifier_0,\r\n          declaration.name.range, declaration.programLevelInternalName\r\n        );\r\n      }\r\n    }\r\n  }\r\n\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\r\n    // static fields become global variables\r\n    if (declaration.is(CommonFlags.STATIC)) {\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        declaration,\r\n        Type.void\r\n      );\r\n      classPrototype.members.set(name, staticField);\r\n      this.elementsLookup.set(internalName, staticField);\r\n\r\n    // instance fields are remembered until resolved\r\n    } else {\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      classPrototype.instanceMembers.set(name, instanceField);\r\n    }\r\n  }\r\n\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    // 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      );\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      );\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.checkOperators(declaration.decorators, prototype, classPrototype);\r\n  }\r\n\r\n  private checkOperators(\r\n    decorators: DecoratorNode[] | null,\r\n    prototype: FunctionPrototype,\r\n    classPrototype: ClassPrototype\r\n  ): void {\r\n    // handle operator annotations. operators are either instance methods taking\r\n    // a second argument of the instance's type or static methods taking two\r\n    // arguments of the instance's type. return values vary depending on the\r\n    // operation.\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 == DecoratorKind.OPERATOR) {\r\n          if (!prototype) {\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              decorator.range\r\n            );\r\n            continue;\r\n          }\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              switch ((<StringLiteralExpression>firstArg).value) {\r\n                case \"[]\": {\r\n                  classPrototype.fnIndexedGet = prototype.simpleName;\r\n                  break;\r\n                }\r\n                case \"[]=\": {\r\n                  classPrototype.fnIndexedSet = prototype.simpleName;\r\n                  break;\r\n                }\r\n                case \"+\": {\r\n                  classPrototype.fnConcat = prototype.simpleName;\r\n                  break;\r\n                }\r\n                case \"==\": {\r\n                  classPrototype.fnEquals = prototype.simpleName;\r\n                  break;\r\n                }\r\n                default: {\r\n                  this.error(\r\n                    DiagnosticCode.Operation_not_supported,\r\n                    firstArg.range\r\n                  );\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        } else if (decorator.decoratorKind != DecoratorKind.CUSTOM) {\r\n          // methods support built-in @operator only\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            decorator.range\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 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      );\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      );\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      }\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.namespace = 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)) {\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      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        element.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, element);\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.checkInternalDecorators(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    var isModuleExport = enm.is(CommonFlags.MODULE_EXPORT);\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 (isModuleExport) {\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    for (let i = 0, k = members.length; i < k; ++i) {\r\n      this.initializeExport(members[i], statement.internalPath, queuedExports);\r\n    }\r\n  }\r\n\r\n  private setExportAndCheckLibrary(\r\n    name: string,\r\n    element: Element,\r\n    identifier: IdentifierExpression\r\n  ): void {\r\n    this.fileLevelExports.set(name, element);\r\n    if (identifier.range.source.isLibrary) { // add global alias\r\n      if (this.elementsLookup.has(identifier.text)) {\r\n        this.error(\r\n          DiagnosticCode.Export_declaration_conflicts_with_exported_declaration_of_0,\r\n          identifier.range, identifier.text\r\n        );\r\n      } else {\r\n        element.internalName = identifier.text;\r\n        this.elementsLookup.set(identifier.text, element);\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 (referencedElement = this.elementsLookup.get(referencedName)) {\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      // 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.referencedName = referencedName; // -> internal 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.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          referencedName = queuedExport.referencedName;\r\n          if (seen.has(queuedExport)) break;\r\n          seen.add(queuedExport);\r\n        } else {\r\n          referencedElement = this.elementsLookup.get(queuedExport.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          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.referencedName = referencedName; // -> export 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 prototype = new FunctionPrototype(\r\n      this,\r\n      simpleName,\r\n      internalName,\r\n      declaration,\r\n      null\r\n    );\r\n    prototype.namespace = 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.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      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, prototype);\r\n      }\r\n    }\r\n\r\n    this.checkInternalDecorators(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) {\r\n      let internalName = (\r\n        statement.range.source.internalPath +\r\n        PATH_DELIMITER +\r\n        statement.namespaceName.text\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      this.error( // TODO\r\n        DiagnosticCode.Operation_not_supported,\r\n        statement.range\r\n      );\r\n    }\r\n  }\r\n\r\n  private initializeImport(\r\n    declaration: ImportDeclaration,\r\n    internalPath: string,\r\n    queuedExports: Map<string,QueuedExport>,\r\n    queuedImports: QueuedImport[]\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 referencedName = 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(referencedName)) {\r\n      this.elementsLookup.set(internalName, element);\r\n      return;\r\n    }\r\n\r\n    // otherwise queue it\r\n    var indexPart = PATH_DELIMITER + \"index\";\r\n    var queuedImport = new QueuedImport();\r\n    queuedImport.internalName = internalName;\r\n    if (internalPath.endsWith(indexPart)) {\r\n      queuedImport.referencedName = referencedName; // try exact first\r\n      queuedImport.referencedNameAlt = (\r\n        internalPath.substring(0, internalPath.length - indexPart.length + 1) +\r\n        declaration.externalName.text\r\n      );\r\n    } else {\r\n      queuedImport.referencedName = referencedName; // try exact first\r\n      queuedImport.referencedNameAlt = (\r\n        internalPath +\r\n        indexPart +\r\n        PATH_DELIMITER +\r\n        declaration.externalName.text\r\n      );\r\n    }\r\n    queuedImport.declaration = declaration;\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    var prototype = new InterfacePrototype(this, declaration.name.text, internalName, declaration);\r\n    prototype.namespace = 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      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        prototype.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, prototype);\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.checkInternalDecorators(prototype, declaration);\r\n  }\r\n\r\n  private initializeNamespace(\r\n    declaration: NamespaceDeclaration,\r\n    queuedExtendingClasses: 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.namespace = parentNamespace;\r\n      this.elementsLookup.set(internalName, namespace);\r\n      this.checkInternalDecorators(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      if (declaration.range.source.isEntry) {\r\n        if (this.moduleLevelExports.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        namespace.set(CommonFlags.MODULE_EXPORT);\r\n        this.moduleLevelExports.set(internalName, namespace);\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], queuedExtendingClasses, 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], queuedExtendingClasses, 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 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        declaration,\r\n        Type.void // resolved later on\r\n      );\r\n      global.namespace = namespace;\r\n      this.elementsLookup.set(internalName, global);\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        if (declaration.range.source.isEntry) {\r\n          if (this.moduleLevelExports.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          global.set(CommonFlags.MODULE_EXPORT);\r\n          this.moduleLevelExports.set(internalName, global);\r\n        }\r\n      }\r\n      this.checkInternalDecorators(global, declaration);\r\n    }\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    reportNotFound: bool = true\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(\r\n        explicitThisType,\r\n        contextualTypeArguments,\r\n        reportNotFound\r\n      );\r\n      if (!thisType) return null;\r\n    }\r\n    var parameterTypeNodes = node.parameterTypes;\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        reportNotFound\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(\r\n        returnTypeNode,\r\n        contextualTypeArguments,\r\n        reportNotFound\r\n      );\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 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    reportNotFound: bool = true\r\n  ): Type | null {\r\n    if (node.kind == NodeKind.SIGNATURE) {\r\n      let signature = this.resolveSignature(<SignatureNode>node, contextualTypeArguments, reportNotFound);\r\n      if (!signature) return null;\r\n      return Type.u32.asFunction(signature);\r\n    }\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;\r\n\r\n    var element: Element | null;\r\n\r\n    // check file-global / program-global element\r\n    if ((element = this.elementsLookup.get(localName)) || (element = this.elementsLookup.get(globalName))) {\r\n      switch (element.kind) {\r\n        case ElementKind.CLASS_PROTOTYPE: {\r\n          let instance = (<ClassPrototype>element).resolveUsingTypeArguments(\r\n            typeNode.typeArguments,\r\n            contextualTypeArguments,\r\n            null\r\n          ); // reports\r\n          return instance ? instance.type : null;\r\n        }\r\n      }\r\n    }\r\n\r\n    // check (global) type alias\r\n    var alias = this.typeAliases.get(simpleName);\r\n    if (alias) return this.resolveType(alias.type, contextualTypeArguments, reportNotFound);\r\n\r\n    // resolve parameters\r\n    if (typeNode.typeArguments) {\r\n      let k = typeNode.typeArguments.length;\r\n      let paramTypes = new Array<Type>(k);\r\n      for (let i = 0; i < k; ++i) {\r\n        let paramType = this.resolveType( // reports\r\n          typeNode.typeArguments[i],\r\n          contextualTypeArguments,\r\n          reportNotFound\r\n        );\r\n        if (!paramType) return null;\r\n        paramTypes[i] = paramType;\r\n      }\r\n\r\n      if (k) { // 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    var type: Type | null;\r\n\r\n    // check file-global / program-global type\r\n    if ((type = this.typesLookup.get(localName)) || (type = this.typesLookup.get(globalName))) {\r\n      return type;\r\n    }\r\n\r\n    if (reportNotFound) {\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 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  ): 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        true\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    contextualFunction: Function | null,\r\n    contextualEnum: Enum | null = null\r\n  ): ResolvedElement | null {\r\n    var name = identifier.text;\r\n\r\n    var element: Element | null;\r\n    var namespace: Element | null;\r\n\r\n    // check siblings\r\n    if (contextualEnum) {\r\n\r\n      if (\r\n        contextualEnum.members &&\r\n        (element = contextualEnum.members.get(name)) &&\r\n        element.kind == ElementKind.ENUMVALUE\r\n      ) {\r\n        if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n        return resolvedElement.set(element);\r\n      }\r\n\r\n    } else if (contextualFunction) {\r\n\r\n      // check locals\r\n      if (element = contextualFunction.flow.getScopedLocal(name)) {\r\n        if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n        return resolvedElement.set(element);\r\n      }\r\n\r\n      // search contextual parent namespaces if applicable\r\n      if (namespace = contextualFunction.prototype.namespace) {\r\n        do {\r\n          if (element = this.elementsLookup.get(namespace.internalName + STATIC_DELIMITER + name)) {\r\n            if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n            return resolvedElement.set(element);\r\n          }\r\n        } while (namespace = namespace.namespace);\r\n      }\r\n    }\r\n\r\n    // search current file\r\n    if (element = this.elementsLookup.get(identifier.range.source.internalPath + PATH_DELIMITER + name)) {\r\n      if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n      return resolvedElement.set(element);\r\n    }\r\n\r\n    // search global scope\r\n    if (element = this.elementsLookup.get(name)) {\r\n      if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n      return resolvedElement.set(element);\r\n    }\r\n\r\n    this.error(\r\n      DiagnosticCode.Cannot_find_name_0,\r\n      identifier.range, name\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  ): ResolvedElement | null {\r\n    // start by resolving the lhs target (expression before the last dot)\r\n    var targetExpression = propertyAccess.expression;\r\n    resolvedElement = this.resolveExpression( // reports\r\n      targetExpression,\r\n      contextualFunction\r\n    );\r\n    if (!resolvedElement) return null;\r\n    var target = resolvedElement.element;\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    var targetType: Type;\r\n    var member: Element | null;\r\n\r\n    // Resolve variable-likes to their class type first\r\n    switch (target.kind) {\r\n      case ElementKind.GLOBAL:\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        if (!(targetType = (<VariableLikeElement>target).type).classType) {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.property.range, propertyName, targetType.toString()\r\n          );\r\n          return null;\r\n        }\r\n        target = <Class>targetType.classType;\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let getter = assert((<Property>target).getterPrototype).resolve(); // reports\r\n        if (!getter) return null;\r\n        if (!(targetType = getter.signature.returnType).classType) {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.property.range, propertyName, targetType.toString()\r\n          );\r\n          return null;\r\n        }\r\n        target = <Class>targetType.classType;\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          if (target.members && (member = target.members.get(propertyName))) {\r\n            return resolvedElement.set(member).withTarget(target, targetExpression);\r\n          }\r\n          // check inherited static members on the base prototype while 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          // or inherited instance members on the base class while 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        if (target.members && (member = target.members.get(propertyName))) {\r\n          return resolvedElement.set(member).withTarget(target, targetExpression);\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  ): ResolvedElement | null {\r\n    // start by resolving the lhs target (expression before the last dot)\r\n    var targetExpression = elementAccess.expression;\r\n    resolvedElement = this.resolveExpression(\r\n      targetExpression,\r\n      contextualFunction\r\n    );\r\n    if (!resolvedElement) return null;\r\n    var target = resolvedElement.element;\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 (type.classType) {\r\n          let indexedGetName = (target = type.classType).prototype.fnIndexedGet;\r\n          let indexedGet: Element | null;\r\n          if (\r\n            indexedGetName != null &&\r\n            target.members &&\r\n            (indexedGet = target.members.get(indexedGetName)) &&\r\n            indexedGet.kind == ElementKind.FUNCTION_PROTOTYPE\r\n          ) {\r\n            return resolvedElement.set(indexedGet).withTarget(type.classType, targetExpression);\r\n          }\r\n        }\r\n        break;\r\n      }\r\n    }\r\n    this.error(\r\n      DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n      targetExpression.range, target.internalName\r\n    );\r\n    return null;\r\n  }\r\n\r\n  resolveExpression(\r\n    expression: Expression,\r\n    contextualFunction: Function\r\n  ): ResolvedElement | 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((<AssertionExpression>expression).toType); // reports\r\n        if (type) {\r\n          let classType = type.classType;\r\n          if (classType) {\r\n            if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n            return resolvedElement.set(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        let parent = contextualFunction.memberOf;\r\n        if (parent) {\r\n          if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n          return resolvedElement.set(parent);\r\n        }\r\n        this.error(\r\n          DiagnosticCode._this_cannot_be_referenced_in_current_location,\r\n          expression.range\r\n        );\r\n        return null;\r\n      }\r\n      case NodeKind.SUPER: { // -> Class\r\n        let parent = contextualFunction.memberOf;\r\n        if (parent && parent.kind == ElementKind.CLASS && (parent = (<Class>parent).base)) {\r\n          if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n          return resolvedElement.set(parent);\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        return null;\r\n      }\r\n      case NodeKind.IDENTIFIER: {\r\n        return this.resolveIdentifier(<IdentifierExpression>expression, contextualFunction);\r\n      }\r\n      case NodeKind.PROPERTYACCESS: {\r\n        return this.resolvePropertyAccess(\r\n          <PropertyAccessExpression>expression,\r\n          contextualFunction\r\n        );\r\n      }\r\n      case NodeKind.ELEMENTACCESS: {\r\n        return this.resolveElementAccess(\r\n          <ElementAccessExpression>expression,\r\n          contextualFunction\r\n        );\r\n      }\r\n      case NodeKind.CALL: {\r\n        let resolved = this.resolveExpression(\r\n          (<CallExpression>expression).expression,\r\n          contextualFunction\r\n        );\r\n        if (resolved) {\r\n          let element = resolved.element;\r\n          if (element && element.kind == ElementKind.FUNCTION_PROTOTYPE) {\r\n            let instance = (<FunctionPrototype>element).resolveUsingTypeArguments(\r\n              (<CallExpression>expression).typeArguments,\r\n              contextualFunction.contextualTypeArguments,\r\n              expression\r\n            );\r\n            if (instance) {\r\n              let returnType = instance.signature.returnType;\r\n              let classType = returnType.classType;\r\n              if (classType) {\r\n                if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n                return resolvedElement.set(classType);\r\n              } else {\r\n                let signature = returnType.functionType;\r\n                if (signature) {\r\n                  let functionTarget = signature.cachedFunctionTarget;\r\n                  if (!functionTarget) {\r\n                    functionTarget = new FunctionTarget(this, signature);\r\n                    signature.cachedFunctionTarget = functionTarget;\r\n                  }\r\n                  if (!resolvedElement) resolvedElement = new ResolvedElement();\r\n                  return resolvedElement.set(functionTarget);\r\n                }\r\n              }\r\n            }\r\n          }\r\n        }\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 null;\r\n  }\r\n}\r\n\r\n/** Common result structure returned when calling any of the resolve functions on a {@link Program}. */\r\nexport class ResolvedElement {\r\n\r\n  /** The target element, if a property or element access */\r\n  target: Element | null;\r\n  /** The target element's expression, if a property or element access. */\r\n  targetExpression: Expression | null;\r\n  /** The element being accessed. */\r\n  element: Element;\r\n\r\n  /** Clears the target and sets the resolved element. */\r\n  set(element: Element): this {\r\n    this.target = null;\r\n    this.targetExpression = null;\r\n    this.element = element;\r\n    return this;\r\n  }\r\n\r\n  /** Sets the resolved target in addition to the previously set element. */\r\n  withTarget(target: Element, targetExpression: Expression): this {\r\n    this.target = target;\r\n    this.targetExpression = targetExpression;\r\n    return this;\r\n  }\r\n\r\n  /** Tests if the target is a valid instance target. */\r\n  get isInstanceTarget(): bool {\r\n    return (\r\n      this.target != null &&\r\n      this.target.kind == ElementKind.CLASS &&\r\n      this.targetExpression != null\r\n    );\r\n  }\r\n}\r\n\r\n// Cached result structure instance\r\nvar resolvedElement: ResolvedElement | null;\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}\r\n\r\n/** Indicates traits of a {@link Node} or {@link Element}. */\r\nexport enum CommonFlags {\r\n  /** No flags set. */\r\n  NONE = 0,\r\n\r\n  // Basic modifiers\r\n\r\n  /** Has an `import` modifier. */\r\n  IMPORT = 1 << 0,\r\n  /** Has an `export` modifier. */\r\n  EXPORT = 1 << 1,\r\n  /** Has a `declare` modifier. */\r\n  DECLARE = 1 << 2,\r\n  /** Has a `const` modifier. */\r\n  CONST = 1 << 3,\r\n  /** 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  // Internal decorators\r\n\r\n  /** Is global. */\r\n  GLOBAL = 1 << 13,\r\n  /** Is built-in. */\r\n  BUILTIN = 1 << 14,\r\n  /** Is unmanaged. */\r\n  UNMANAGED = 1 << 15,\r\n\r\n  // Extended modifiers usually derived from basic modifiers or internal decorators\r\n\r\n  /** Is ambient, that is either declared or nested in a declared element. */\r\n  AMBIENT = 1 << 16,\r\n  /** Is generic. */\r\n  GENERIC = 1 << 17,\r\n  /** Is part of a generic context. */\r\n  GENERIC_CONTEXT = 1 << 18,\r\n  /** Is an instance member. */\r\n  INSTANCE = 1 << 19,\r\n  /** Is a constructor. */\r\n  CONSTRUCTOR = 1 << 20,\r\n  /** Is an arrow function. */\r\n  ARROW = 1 << 21,\r\n  /** Is a module export. */\r\n  MODULE_EXPORT = 1 << 22,\r\n  /** Is a module import. */\r\n  MODULE_IMPORT = 1 << 23,\r\n\r\n  // Compilation states\r\n\r\n  /** Is compiled. */\r\n  COMPILED = 1 << 24,\r\n  /** Has a constant value and is therefore inlined. */\r\n  INLINED = 1 << 25,\r\n  /** Is scoped. */\r\n  SCOPED = 1 << 26\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  /** Namespaced member elements. */\r\n  members: Map<string,Element> | null = null;\r\n  /** Parent namespace, if applicable. */\r\n  namespace: 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}\r\n\r\n/** A namespace. */\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  /** Parent enum. */\r\n  enum: Enum;\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.enum = 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;\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  withConstantIntegerValue(lo: i32, hi: i32): this {\r\n    this.constantValueKind = ConstantValueKind.INTEGER;\r\n    this.constantIntegerValue = i64_new(lo, hi);\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    declaration: VariableLikeDeclarationStatement,\r\n    type: Type\r\n  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\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\r\n  constructor(program: Program, simpleName: string, index: i32, type: Type) {\r\n    super(program, simpleName, simpleName);\r\n    this.index = index;\r\n    this.type = type;\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\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  ) {\r\n    super(program, simpleName, internalName);\r\n    this.declaration = declaration;\r\n    this.flags = declaration.flags;\r\n    this.classPrototype = classPrototype;\r\n  }\r\n\r\n  /** Resolves this prototype to an instance using the specified concrete type arguments. */\r\n  resolve(\r\n    functionTypeArguments: Type[] | null = null,\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ): Function | null {\r\n    var instanceKey = functionTypeArguments ? typesToString(functionTypeArguments) : \"\";\r\n    var instance = this.instances.get(instanceKey);\r\n    if (instance) return instance;\r\n\r\n    var declaration = this.declaration;\r\n    var isInstance = this.is(CommonFlags.INSTANCE);\r\n    var classPrototype = this.classPrototype;\r\n\r\n    // inherit contextual type arguments as provided. might be 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 = this.classTypeArguments;\r\n    if (classTypeArguments) { // set only if partially resolved\r\n      assert(this.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 (functionTypeArguments && (numFunctionTypeArguments = functionTypeArguments.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          functionTypeArguments[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 = assert(classPrototype).resolve(classTypeArguments, contextualTypeArguments); // reports\r\n      if (!classInstance) return null;\r\n      thisType = classInstance.type;\r\n    }\r\n\r\n    // resolve signature node\r\n    var signatureParameters = signatureNode.parameterTypes;\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.program.resolveType(typeNode, contextualTypeArguments, true); // reports\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 (this.is(CommonFlags.SET) || this.is(CommonFlags.CONSTRUCTOR)) {\r\n      returnType = Type.void; // not annotated\r\n    } else {\r\n      let typeNode = assert(signatureNode.returnType);\r\n      let type = this.program.resolveType(typeNode, contextualTypeArguments, true); // reports\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 = this.internalName;\r\n    if (instanceKey.length) internalName += \"<\" + instanceKey + \">\";\r\n    instance = new Function(this, internalName, signature, classInstance ? classInstance : classPrototype);\r\n    instance.contextualTypeArguments = contextualTypeArguments;\r\n    this.instances.set(instanceKey, instance);\r\n    return instance;\r\n  }\r\n\r\n  /** Resolves this prototype partially by applying the specified inherited class type arguments. */\r\n  resolvePartial(classTypeArguments: Type[] | null): FunctionPrototype | null {\r\n    assert(this.is(CommonFlags.INSTANCE));\r\n    assert(this.classPrototype);\r\n    if (classTypeArguments && classTypeArguments.length) {\r\n      let partialPrototype = new FunctionPrototype(\r\n        this.program,\r\n        this.simpleName,\r\n        this.internalName,\r\n        this.declaration,\r\n        this.classPrototype\r\n      );\r\n      partialPrototype.flags = this.flags;\r\n      partialPrototype.classTypeArguments = classTypeArguments;\r\n      return partialPrototype;\r\n    }\r\n    return this; // no need to clone\r\n  }\r\n\r\n  /** Resolves the specified type arguments prior to resolving this prototype to an instance. */\r\n  resolveUsingTypeArguments(\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    reportNode: Node\r\n  ): Function | null {\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n    if (this.is(CommonFlags.GENERIC)) {\r\n      assert(typeArgumentNodes != null && typeArgumentNodes.length != 0);\r\n      resolvedTypeArguments = this.program.resolveTypeArguments(\r\n        assert(this.declaration.typeParameters),\r\n        typeArgumentNodes,\r\n        contextualTypeArguments,\r\n        reportNode\r\n      );\r\n      if (!resolvedTypeArguments) return null;\r\n    }\r\n    return this.resolve(resolvedTypeArguments, contextualTypeArguments);\r\n  }\r\n\r\n  /** Resolves the type arguments to use when compiling a built-in call. Must be a built-in. */\r\n  resolveBuiltinTypeArguments(\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null\r\n  ): Type[] | null {\r\n    assert(this.is(CommonFlags.BUILTIN));\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n    if (typeArgumentNodes) {\r\n      let k = typeArgumentNodes.length;\r\n      resolvedTypeArguments = new Array<Type>(k);\r\n      for (let i = 0; i < k; ++i) {\r\n        let resolvedType = this.program.resolveType( // reports\r\n          typeArgumentNodes[i],\r\n          contextualTypeArguments,\r\n          true\r\n        );\r\n        if (!resolvedType) return null;\r\n        resolvedTypeArguments[i] = resolvedType;\r\n      }\r\n    }\r\n    return resolvedTypeArguments;\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  /** If a member of another namespace-like element, the concrete element it is a member of. */\r\n  memberOf: Element | null;\r\n  /** Map of locals by name. */\r\n  locals: Map<string,Local> = new Map();\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[] | null = null;\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\r\n  private nextBreakId: i32 = 0;\r\n  private breakStack: i32[] | null = null;\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    memberOf: Element | 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.memberOf = memberOf;\r\n    this.flags = prototype.flags;\r\n    if (!(prototype.is(CommonFlags.BUILTIN) || prototype.is(CommonFlags.DECLARE))) {\r\n      let localIndex = 0;\r\n      if (memberOf && memberOf.kind == ElementKind.CLASS) {\r\n        assert(this.is(CommonFlags.INSTANCE));\r\n        this.locals.set(\r\n          \"this\",\r\n          new Local(\r\n            prototype.program,\r\n            \"this\",\r\n            localIndex++,\r\n            assert(signature.thisType)\r\n          )\r\n        );\r\n        let contextualTypeArguments = (<Class>memberOf).contextualTypeArguments;\r\n        if (contextualTypeArguments) {\r\n          if (!this.contextualTypeArguments) {\r\n            this.contextualTypeArguments = new Map();\r\n          }\r\n          for (let [inheritedName, inheritedType] of contextualTypeArguments) {\r\n            this.contextualTypeArguments.set(inheritedName, inheritedType);\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        this.locals.set(\r\n          parameterName,\r\n          new Local(\r\n            prototype.program,\r\n            parameterName,\r\n            localIndex++,\r\n            parameterType\r\n          )\r\n        );\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): 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    );\r\n    if (name) {\r\n      if (this.locals.has(name)) throw new Error(\"duplicate local name\");\r\n      this.locals.set(name, local);\r\n    }\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): 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    if (temps && temps.length) {\r\n      let ret = temps.pop();\r\n      ret.type = type;\r\n      return ret;\r\n    }\r\n    return this.addLocal(type);\r\n  }\r\n\r\n  /** Frees the temporary local for reuse. */\r\n  freeTempLocal(local: Local): void {\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    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): 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    if (temps.length > 0) {\r\n      return temps[temps.length - 1];\r\n    }\r\n    var local: Local = this.addLocal(type);\r\n    temps.push(local);\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) {\r\n      this.breakStack = [ id ];\r\n    } else {\r\n      this.breakStack.push(id);\r\n    }\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      if (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    this.debugLocations = null;\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(prototype: FieldPrototype, internalName: string, type: Type) {\r\n    super(prototype.program, prototype.simpleName, internalName);\r\n    this.prototype = prototype;\r\n    this.flags = prototype.flags;\r\n    this.type = type;\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\r\n  /** Overloaded indexed get method, if any. */\r\n  fnIndexedGet: string | null = null;\r\n  /** Overloaded indexed set method, if any. */\r\n  fnIndexedSet: string | null = null;\r\n  /** Overloaded concatenation method, if any. */\r\n  fnConcat: string | null = null;\r\n  /** Overloaded equality comparison method, if any. */\r\n  fnEquals: string | null = null;\r\n\r\n  constructor(\r\n    program: Program,\r\n    simpleName: string,\r\n    internalName: string,\r\n    declaration: ClassDeclaration\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  /** Resolves this prototype to an instance using the specified concrete type arguments. */\r\n  resolve(\r\n    typeArguments: Type[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null = null\r\n  ): Class | null {\r\n    var instanceKey = typeArguments ? typesToString(typeArguments) : \"\";\r\n    var instance = this.instances.get(instanceKey);\r\n    if (instance) return instance;\r\n\r\n    // inherit contextual type arguments\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    var declaration = this.declaration;\r\n    var baseClass: Class | null = null;\r\n    if (declaration.extendsType) {\r\n      let baseClassType = this.program.resolveType(declaration.extendsType, null); // reports\r\n      if (!baseClassType) return null;\r\n      if (!(baseClass = baseClassType.classType)) {\r\n        this.program.error(\r\n          DiagnosticCode.A_class_may_only_extend_another_class,\r\n          declaration.extendsType.range\r\n        );\r\n        return null;\r\n      }\r\n      if (baseClass.prototype.is(CommonFlags.UNMANAGED) != this.is(CommonFlags.UNMANAGED)) {\r\n        this.program.error(\r\n          DiagnosticCode.Structs_cannot_extend_classes_and_vice_versa,\r\n          Range.join(declaration.name.range, declaration.extendsType.range)\r\n        );\r\n        return null;\r\n      }\r\n    }\r\n\r\n    // override call specific contextual type arguments if provided\r\n    var i: i32, k: i32;\r\n    if (typeArguments) {\r\n      if ((k = typeArguments.length) != declaration.typeParameters.length) {\r\n        throw new Error(\"type argument count mismatch\");\r\n      }\r\n      for (i = 0; i < k; ++i) {\r\n        contextualTypeArguments.set(declaration.typeParameters[i].name.text, typeArguments[i]);\r\n      }\r\n    } else if (declaration.typeParameters.length) {\r\n      throw new Error(\"type argument count mismatch\");\r\n    }\r\n\r\n    var internalName = this.internalName;\r\n    if (instanceKey.length) {\r\n      internalName += \"<\" + instanceKey + \">\";\r\n    }\r\n    instance = new Class(this, internalName, typeArguments, baseClass);\r\n    instance.contextualTypeArguments = contextualTypeArguments;\r\n    this.instances.set(instanceKey, instance);\r\n\r\n    var memoryOffset: u32 = 0;\r\n    if (baseClass) {\r\n      memoryOffset = baseClass.currentMemoryOffset;\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    }\r\n\r\n    if (this.constructorPrototype) {\r\n      let partialConstructor = this.constructorPrototype.resolvePartial(typeArguments); // reports\r\n      if (partialConstructor) {\r\n        instance.constructorInstance = partialConstructor.resolve(); // reports\r\n      }\r\n      // TODO: ^ doesn't know the return type, hence returns null\r\n    }\r\n\r\n    if (this.instanceMembers) {\r\n      for (let member of this.instanceMembers.values()) {\r\n        switch (member.kind) {\r\n          case ElementKind.FIELD_PROTOTYPE: { // fields are layed out in advance\r\n            if (!instance.members) instance.members = new Map();\r\n            let fieldDeclaration = (<FieldPrototype>member).declaration;\r\n            if (!fieldDeclaration.type) {\r\n              throw new Error(\"type expected\"); // TODO: check if parent class defines a type\r\n            }\r\n            let fieldType = this.program.resolveType( // reports\r\n              fieldDeclaration.type,\r\n              instance.contextualTypeArguments\r\n            );\r\n            if (fieldType) {\r\n              let fieldInstance = new Field(\r\n                <FieldPrototype>member,\r\n                internalName + INSTANCE_DELIMITER + (<FieldPrototype>member).simpleName,\r\n                fieldType\r\n              );\r\n              switch (fieldType.byteSize) { // align\r\n                case 1: break;\r\n                case 2: {\r\n                  if (memoryOffset & 1) ++memoryOffset;\r\n                  break;\r\n                }\r\n                case 4: {\r\n                  if (memoryOffset & 3) memoryOffset = (memoryOffset | 3) + 1;\r\n                  break;\r\n                }\r\n                case 8: {\r\n                  if (memoryOffset & 7) memoryOffset = (memoryOffset | 7) + 1;\r\n                  break;\r\n                }\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            }\r\n            break;\r\n          }\r\n          case ElementKind.FUNCTION_PROTOTYPE: { // instance methods remain partially resolved prototypes until compiled\r\n            if (!instance.members) instance.members = new Map();\r\n            let methodPrototype = (<FunctionPrototype>member).resolvePartial(typeArguments); // reports\r\n            if (methodPrototype) {\r\n              methodPrototype.internalName = internalName + INSTANCE_DELIMITER + methodPrototype.simpleName;\r\n              instance.members.set(member.simpleName, methodPrototype);\r\n            }\r\n            break;\r\n          }\r\n          case ElementKind.PROPERTY: { // instance properties are cloned with partially resolved getters and setters\r\n            if (!instance.members) instance.members = new Map();\r\n            let getterPrototype = assert((<Property>member).getterPrototype);\r\n            let setterPrototype = (<Property>member).setterPrototype;\r\n            let instanceProperty = new Property(\r\n              this.program,\r\n              member.simpleName,\r\n              internalName + INSTANCE_DELIMITER + member.simpleName,\r\n              this\r\n            );\r\n            let partialGetterPrototype = getterPrototype.resolvePartial(typeArguments);\r\n            if (!partialGetterPrototype) return null;\r\n            partialGetterPrototype.internalName = (\r\n              internalName + INSTANCE_DELIMITER + partialGetterPrototype.simpleName\r\n            );\r\n            instanceProperty.getterPrototype = partialGetterPrototype;\r\n            if (setterPrototype) {\r\n              let partialSetterPrototype = setterPrototype.resolvePartial(typeArguments);\r\n              if (!partialSetterPrototype) return null;\r\n              partialSetterPrototype.internalName = (\r\n                internalName + INSTANCE_DELIMITER + partialSetterPrototype.simpleName\r\n              );\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    instance.currentMemoryOffset = memoryOffset; // sizeof<this>() is its byte size in memory\r\n    return instance;\r\n  }\r\n\r\n  /** Resolves the specified type arguments prior to resolving this prototype to an instance. */\r\n  resolveUsingTypeArguments(\r\n    typeArgumentNodes: CommonTypeNode[] | null,\r\n    contextualTypeArguments: Map<string,Type> | null,\r\n    alternativeReportNode: Node | null\r\n  ): Class | null {\r\n    var resolvedTypeArguments: Type[] | null = null;\r\n    if (this.is(CommonFlags.GENERIC)) {\r\n      assert(typeArgumentNodes != null && typeArgumentNodes.length != 0);\r\n      resolvedTypeArguments = this.program.resolveTypeArguments(\r\n        this.declaration.typeParameters,\r\n        typeArgumentNodes,\r\n        contextualTypeArguments,\r\n        alternativeReportNode\r\n      );\r\n      if (!resolvedTypeArguments) return null;\r\n    } else {\r\n      assert(typeArgumentNodes == null || !typeArgumentNodes.length);\r\n    }\r\n    return this.resolve(resolvedTypeArguments, contextualTypeArguments);\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\r\n  /** Constructs a new class. */\r\n  constructor(\r\n    prototype: ClassPrototype,\r\n    internalName: string,\r\n    typeArguments: Type[] | null = null,\r\n    base: Class | null = null\r\n  ) {\r\n    super(prototype.program, prototype.simpleName, internalName);\r\n    this.prototype = prototype;\r\n    this.flags = prototype.flags;\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      if (base.contextualTypeArguments) {\r\n        if (!this.contextualTypeArguments) this.contextualTypeArguments = new Map();\r\n        for (let [baseName, baseType] of base.contextualTypeArguments) {\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 {\r\n      if (current == target) {\r\n        return true;\r\n      }\r\n    } while (current = current.base);\r\n    return false;\r\n  }\r\n\r\n  toString(): string {\r\n    return this.prototype.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  ) {\r\n    super(program, simpleName, internalName, declaration);\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    internalName: string,\r\n    typeArguments: Type[] = [],\r\n    base: Interface | null = null\r\n  ) {\r\n    super(prototype, 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  /** This branch always returns. */\r\n  RETURNS = 1 << 0,\r\n  /** This branch possibly throws. */\r\n  POSSIBLY_THROWS = 1 << 1,\r\n  /** This branch possible breaks. */\r\n  POSSIBLY_BREAKS = 1 << 2,\r\n  /** This branch possible continues. */\r\n  POSSIBLY_CONTINUES = 1 << 3\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  /** Scoped local variables. */\r\n  scopedLocals: Map<string,Local> | null = 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    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\r\n  /** Sets the specified flag or flags. */\r\n  set(flag: FlowFlags): void { this.flags |= flag; }\r\n\r\n  /** Enters a new branch or scope and returns the new flow. */\r\n  enterBranchOrScope(): Flow {\r\n    var branchFlow = new Flow();\r\n    branchFlow.parent = this;\r\n    branchFlow.flags = this.flags;\r\n    branchFlow.currentFunction = this.currentFunction;\r\n    branchFlow.continueLabel = this.continueLabel;\r\n    branchFlow.breakLabel = this.breakLabel;\r\n    return branchFlow;\r\n  }\r\n\r\n  /** Leaves the current branch or scope and returns the parent flow. */\r\n  leaveBranchOrScope(): Flow {\r\n    var parent = assert(this.parent);\r\n\r\n    // Free block-scoped locals\r\n    if (this.scopedLocals) {\r\n      for (let scopedLocal of this.scopedLocals.values()) {\r\n        this.currentFunction.freeTempLocal(scopedLocal);\r\n      }\r\n      this.scopedLocals = null;\r\n    }\r\n\r\n    // Propagate flags to parent\r\n    if (this.is(FlowFlags.POSSIBLY_THROWS)) {\r\n      parent.set(FlowFlags.POSSIBLY_THROWS);\r\n    }\r\n    if (this.is(FlowFlags.POSSIBLY_BREAKS) && parent.breakLabel == this.breakLabel) {\r\n      parent.set(FlowFlags.POSSIBLY_BREAKS);\r\n    }\r\n    if (this.is(FlowFlags.POSSIBLY_CONTINUES) && parent.continueLabel == this.continueLabel) {\r\n      parent.set(FlowFlags.POSSIBLY_CONTINUES);\r\n    }\r\n\r\n    return parent;\r\n  }\r\n\r\n  /** Adds a new scoped local of the specified name. */\r\n  addScopedLocal(name: string, type: Type, reportNode: Node): void {\r\n    var scopedLocal = this.currentFunction.getTempLocal(type);\r\n    if (!this.scopedLocals) this.scopedLocals = new Map();\r\n    else if (this.scopedLocals.has(name)) {\r\n      this.currentFunction.program.error(\r\n        DiagnosticCode.Duplicate_identifier_0,\r\n        reportNode.range\r\n      );\r\n      return;\r\n    }\r\n    this.scopedLocals.set(name, scopedLocal);\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.locals.get(name);\r\n  }\r\n\r\n  /** Finalizes this flow. Must be the topmost parent flow of the function. */\r\n  finalize(): bool {\r\n    assert(this.parent == null, \"must be the topmost parent flow\");\r\n    this.continueLabel = null;\r\n    this.breakLabel = null;\r\n    return this.is(FlowFlags.RETURNS);\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 * 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[93m\";\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))) {\r\n    start--;\r\n  }\r\n  while (end < len && !isLineBreak(text.charCodeAt(end))) {\r\n    end++;\r\n  }\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) {\r\n      sb.push(\"~\");\r\n    }\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 * 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 enum NativeType {\r\n  None = _BinaryenTypeNone(),\r\n  I32 = _BinaryenTypeInt32(),\r\n  I64 = _BinaryenTypeInt64(),\r\n  F32 = _BinaryenTypeFloat32(),\r\n  F64 =  _BinaryenTypeFloat64(),\r\n  Unreachable = _BinaryenTypeUnreachable(),\r\n  Auto = _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/threads/blob/master/proposals/threads/Overview.md#new-sign-extending-operators\r\n  // ExtendI8ToI32 =_BinaryenExtendS8Int32()\r\n  // ExtendI16ToI32 = _BinaryenExtendS16Int32()\r\n  // ExtendI8ToI64 = _BinaryenExtendS8Int64() // operand is I64\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  out: 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.out = allocate_memory(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.out = allocate_memory(3 * 8); // LLVM C-ABI, max used is 3 * usize\r\n      return module;\r\n    } finally {\r\n      free_memory(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      free_memory(cArr);\r\n      free_memory(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      free_memory(cArr);\r\n    }\r\n  }\r\n\r\n  // constants\r\n\r\n  createI32(value: i32): ExpressionRef {\r\n    var out = this.out;\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.out;\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.out;\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.out;\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 = allocI32Array(operands);\r\n    try {\r\n      return _BinaryenHost(this.ref, op, cStr, cArr, operands ? (<ExpressionRef[]>operands).length : 0);\r\n    } finally {\r\n      free_memory(cArr);\r\n      free_memory(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      free_memory(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      free_memory(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 = allocI32Array(children);\r\n    try {\r\n      return _BinaryenBlock(this.ref, cStr, cArr, children.length, type);\r\n    } finally {\r\n      free_memory(cArr);\r\n      free_memory(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      free_memory(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      free_memory(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      free_memory(cStr);\r\n      free_memory(cArr);\r\n      for (let i = numNames - 1; i >= 0; --i) free_memory(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 = allocI32Array(operands);\r\n    try {\r\n      return _BinaryenCall(this.ref, cStr, cArr, operands && operands.length || 0, returnType);\r\n    } finally {\r\n      free_memory(cArr);\r\n      free_memory(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 = allocI32Array(operands);\r\n    try {\r\n      return _BinaryenCallImport(this.ref, cStr, cArr, operands && operands.length || 0, returnType);\r\n    } finally {\r\n      free_memory(cArr);\r\n      free_memory(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 = allocI32Array(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      free_memory(cStr);\r\n      free_memory(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      free_memory(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      free_memory(cArr);\r\n      free_memory(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      free_memory(cStr);\r\n    }\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      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr2);\r\n      free_memory(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      free_memory(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      free_memory(cStr3);\r\n      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr3);\r\n      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr3);\r\n      free_memory(cStr2);\r\n      free_memory(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      free_memory(cStr3);\r\n      free_memory(cStr2);\r\n      free_memory(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      free_memory(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      free_memory(cArr3);\r\n      free_memory(cArr2);\r\n      free_memory(cArr1);\r\n      for (let i = k - 1; i >= 0; --i) free_memory(segs[i]);\r\n      free_memory(cStr);\r\n    }\r\n  }\r\n\r\n  setFunctionTable(funcs: FunctionRef[]): void {\r\n    var cArr = allocI32Array(funcs);\r\n    try {\r\n      _BinaryenSetFunctionTable(this.ref, cArr, funcs.length);\r\n    } finally {\r\n      free_memory(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  setOptimizeLevel(level: i32 = 2): void {\r\n    _BinaryenSetOptimizeLevel(level);\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      free_memory(cArr);\r\n      for (let i = numNames; i >= 0; --i) {\r\n        free_memory(names[i]);\r\n      }\r\n    }\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.out;\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) free_memory(cStr);\r\n      if (binaryPtr) free_memory(binaryPtr);\r\n      if (sourceMapPtr) free_memory(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    if (!this.ref) return; // sic\r\n    _BinaryenModuleDispose(this.ref);\r\n    free_memory(this.out);\r\n  }\r\n\r\n  createRelooper(): Relooper {\r\n    return Relooper.create(this);\r\n  }\r\n\r\n  cloneExpression(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 _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      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      free_memory(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\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  static createStub(module: Module): Relooper {\r\n    var relooper = new Relooper();\r\n    relooper.module = module;\r\n    relooper.ref = 0;\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      free_memory(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// 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 = allocate_memory(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 = allocate_memory(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 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 = allocate_memory(stringLengthUTF8(str) + 1);\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    // 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","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 * 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 \"./program\";\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} 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  COMMA,\r\n  ELEMENTACCESS,\r\n  FALSE,\r\n  FUNCTION,\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/** 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 a specific 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.parameterTypes = 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    expression: 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 = expression; expression.parent = stmt;\r\n    stmt.arguments = args; if (args) setParent(args, stmt);\r\n    if (expression.kind == NodeKind.IDENTIFIER) {\r\n      switch ((<IdentifierExpression>expression).text) {\r\n        case \"global\": {\r\n          stmt.decoratorKind = DecoratorKind.GLOBAL;\r\n          break;\r\n        }\r\n        case \"operator\": {\r\n          stmt.decoratorKind = DecoratorKind.OPERATOR;\r\n          break;\r\n        }\r\n        case \"unmanaged\": {\r\n          stmt.decoratorKind = DecoratorKind.UNMANAGED;\r\n          break;\r\n        }\r\n        case \"offset\": {\r\n          stmt.decoratorKind = DecoratorKind.OFFSET;\r\n          break;\r\n        }\r\n        default: {\r\n          stmt.decoratorKind = DecoratorKind.CUSTOM;\r\n          break;\r\n        }\r\n      }\r\n    } else {\r\n      stmt.decoratorKind = DecoratorKind.CUSTOM;\r\n    }\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 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 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 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[], // can't be a function\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; 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[],\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; 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    extendsType: TypeNode | null, // can't be a function\r\n    members: DeclarationStatement[],\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.extendsType = extendsType; if (extendsType) extendsType.parent = stmt;\r\n    stmt.members = members; setParent(members, 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}\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  parameterTypes: 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  UNMANAGED,\r\n  OFFSET\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 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 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 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\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  /** 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\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    this.internalPath = mangleInternalPath(this.normalizedPath);\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. */\r\n  extendsType: TypeNode | null; // can't be a function\r\n  /** Interface types being implemented. */\r\n  implementsTypes: TypeNode[]; // can't be a function\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. */\r\n  members: ExportMember[];\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\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/** Gets the first decorator by name within at set of decorators, if present. */\r\nexport function getFirstDecorator(name: string, 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      let expression = decorator.name;\r\n      if (expression.kind == NodeKind.IDENTIFIER && (<IdentifierExpression>expression).text == name) {\r\n        return decorator;\r\n      }\r\n    }\r\n  }\r\n  return null;\r\n}\r\n\r\n/** Tests if a specific decorator is present within the specified decorators. */\r\nexport function hasDecorator(name: string, decorators: DecoratorNode[] | null): bool {\r\n  return getFirstDecorator(name, decorators) != 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 * 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 function tokenFomKeyword(text: string): Token {\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    case \"break\": return Token.BREAK;\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    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    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    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    case \"get\": return Token.GET;\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    case \"keyof\": return Token.KEYOF;\r\n    case \"let\": return Token.LET;\r\n    case \"module\": return Token.MODULE;\r\n    case \"namespace\": return Token.NAMESPACE;\r\n    case \"new\": return Token.NEW;\r\n    case \"null\": return Token.NULL;\r\n    case \"of\": return Token.OF;\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    case \"readonly\": return Token.READONLY;\r\n    case \"return\": return Token.RETURN;\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    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    case \"var\": return Token.VAR;\r\n    case \"void\": return Token.VOID;\r\n    case \"while\": return Token.WHILE;\r\n    case \"with\": return Token.WITH;\r\n    case \"yield\": return Token.YIELD;\r\n    default: return Token.INVALID;\r\n  }\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.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(preferIdentifier: bool = false): Token {\r\n    this.nextToken = -1;\r\n    return this.token = this.unsafeNext(preferIdentifier);\r\n  }\r\n\r\n  private unsafeNext(preferIdentifier: bool = false, maxTokenLength: i32 = i32.MAX_VALUE): 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          ) {\r\n            ++this.pos;\r\n          }\r\n          break;\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 = tokenFomKeyword(keywordText);\r\n              if (\r\n                keywordToken != Token.INVALID &&\r\n                !(preferIdentifier && tokenIsAlsoIdentifier(keywordToken))\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    preferIdentifier: bool = false,\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(preferIdentifier, maxCompoundLength);\r\n      this.nextTokenPos = this.tokenPos;\r\n      if (checkOnNewLine) {\r\n        this.nextTokenOnNewLine = false;\r\n        while (--this.tokenPos > posBefore) {\r\n          if (isLineBreak(text.charCodeAt(this.tokenPos))) {\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  skip(token: Token): 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(token == Token.IDENTIFIER, 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    reusableState = state;\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) break;\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    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        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 {\r\n        break;\r\n      }\r\n      ++this.pos;\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    }\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    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 * 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 {\r\n        break;\r\n      }\r\n      ++this.pos;\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    }\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    while (this.pos < this.end) {\r\n      let c = text.charCodeAt(this.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 {\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    }\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    while (this.pos < this.end) {\r\n      let c = text.charCodeAt(this.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 {\r\n        break;\r\n      }\r\n      ++this.pos;\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    }\r\n    return value;\r\n  }\r\n\r\n  readFloat(): f64 {\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  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 * 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} 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 sized integer type with a target specific bit size. */\r\n  SIZE = 1 << 4,\r\n  /** Is a small type that is emulated in a larger type. */\r\n  SMALL = 1 << 5,\r\n  /** Is a long type 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. Ceiled to 8-bits. */\r\n  byteSize: i32;\r\n  /** Underlying class type, if a class type. */\r\n  classType: Class | null;\r\n  /** Underlying function type, if a function type. */\r\n  functionType: Signature | null;\r\n  /** Respective nullable type, if non-nullable. */\r\n  nullableType: Type | null = null;\r\n  /** Respective non-nullable type, if nullable. */\r\n  nonNullableType: Type;\r\n\r\n  /** Constructs a new resolved type. */\r\n  constructor(kind: TypeKind, flags: TypeFlags, size: i32) {\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.classType = null;\r\n    this.nonNullableType = this;\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    return ~0 >>> (targetType.size - this.size);\r\n  }\r\n\r\n  /** Tests if this type has 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  /** Tests if this type is a class type. */\r\n  get isClass(): bool { return this.classType != null; }\r\n  /** Tests if this type is a function type. */\r\n  get isFunction(): bool { return this.functionType != null; }\r\n  /** Tests if this type is a reference type. */\r\n  get isReference(): bool { return this.classType != null || this.functionType != null; }\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.classType);\r\n    var ret = new Type(this.kind, this.flags & ~TypeFlags.VALUE | TypeFlags.REFERENCE, this.size);\r\n    ret.classType = classType;\r\n    return ret;\r\n  }\r\n\r\n  /** Composes a function type from this type and a function. */\r\n  asFunction(functionType: Signature): Type {\r\n    assert(this.kind == TypeKind.U32 && !this.functionType);\r\n    var ret = new Type(this.kind, this.flags & ~TypeFlags.VALUE | TypeFlags.REFERENCE, this.size);\r\n    ret.functionType = functionType;\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.isReference);\r\n    if (!this.nullableType) {\r\n      assert(!this.is(TypeFlags.NULLABLE));\r\n      this.nullableType = new Type(this.kind, this.flags | TypeFlags.NULLABLE, this.size);\r\n      this.nullableType.classType = this.classType;       // either a class reference\r\n      this.nullableType.functionType = this.functionType; // or a function reference\r\n    }\r\n    return this.nullableType;\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, signednessIsImportant: 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.isReference) {\r\n      if (target.isReference) {\r\n        if (currentClass = this.classType) {\r\n          if (targetClass = target.classType) {\r\n            return currentClass.isAssignableTo(targetClass);\r\n          }\r\n        } else if (currentFunction = this.functionType) {\r\n          if (targetFunction = target.functionType) {\r\n            return currentFunction.isAssignableTo(targetFunction);\r\n          }\r\n        }\r\n      }\r\n    } else if (!target.isReference) {\r\n      if (this.is(TypeFlags.INTEGER)) {\r\n        if (target.is(TypeFlags.INTEGER)) {\r\n          if (!signednessIsImportant || 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)) {\r\n      return left;\r\n    } else if (left.isAssignableTo(right, signednessIsImportant)) {\r\n      return right;\r\n    }\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    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: {\r\n        let functionType = this.functionType;\r\n        return kindOnly || !functionType\r\n          ? \"u32\"\r\n          : functionType.toString(true);\r\n      }\r\n      case TypeKind.U64: return \"u64\";\r\n      case TypeKind.USIZE: {\r\n        let classType = this.classType;\r\n        return kindOnly || !classType\r\n          ? \"usize\"\r\n          : classType.toString();\r\n      }\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  // 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.SMALL    |\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.SMALL    |\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.SIZE     |\r\n    TypeFlags.INTEGER  |\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.SIZE     |\r\n    TypeFlags.INTEGER  |\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.SMALL    |\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.SMALL    |\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.SIZE     |\r\n    TypeFlags.INTEGER  |\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.SIZE     |\r\n    TypeFlags.INTEGER  |\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.SMALL    |\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) {\r\n    ret[i] = types[i].toNativeType();\r\n  }\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) {\r\n    sb[i] = types[i].toString();\r\n  }\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\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  }\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      : getGenericParameterName(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))) {\r\n        return false;\r\n      }\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) {\r\n      return false; // TODO\r\n    }\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) {\r\n      return false;\r\n    }\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)) {\r\n        return false;\r\n      }\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 this signature to a function type string. */\r\n  toSignatureString(): string {\r\n    var sb = [];\r\n    var thisType = this.thisType;\r\n    if (thisType) {\r\n      sb.push(thisType.toSignatureString());\r\n    }\r\n    var parameterTypes = this.parameterTypes;\r\n    for (let i = 0, k = parameterTypes.length; i < k; ++i) {\r\n      sb.push(parameterTypes[i].toSignatureString());\r\n    }\r\n    sb.push(this.returnType.toSignatureString());\r\n    return sb.join(\"\");\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) {\r\n          sb.push((<string[]>names)[i]);\r\n        } else {\r\n          sb.push(getGenericParameterName(i));\r\n        }\r\n        if (i >= optionalStart && i != restIndex) {\r\n          sb.push(\"?: \");\r\n        } else {\r\n          sb.push(\": \");\r\n        }\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 generic parameter names used where names are unknown.\r\nvar cachedGenericParameterNames: string[] | null = null;\r\n\r\n/** Gets the cached generic parameter name for the specified index. */\r\nexport function getGenericParameterName(index: i32): string {\r\n  if (!cachedGenericParameterNames) cachedGenericParameterNames = [];\r\n  for (let i = cachedGenericParameterNames.length; i <= index; ++i) {\r\n    cachedGenericParameterNames.push(\"arg$\" + i.toString(10));\r\n  }\r\n  return cachedGenericParameterNames[index - 1];\r\n}\r\n","/**\r\n * The AssemblyScript compiler.\r\n * @module compiler\r\n *//***/\r\n\r\nimport {\r\n  compileCall as compileBuiltinCall,\r\n  compileGetConstant as compileBuiltinGetConstant,\r\n  compileAllocate as compileBuiltinAllocate\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} from \"./module\";\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  CommonFlags,\r\n  ConstantValueKind,\r\n\r\n  PATH_DELIMITER,\r\n  LIBRARY_PREFIX\r\n} from \"./program\";\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\r\n  Statement,\r\n  BlockStatement,\r\n  BreakStatement,\r\n  ClassDeclaration,\r\n  ContinueStatement,\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  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  ParenthesizedExpression,\r\n  PropertyAccessExpression,\r\n  TernaryExpression,\r\n  ArrayLiteralExpression,\r\n  StringLiteralExpression,\r\n  UnaryPostfixExpression,\r\n  UnaryPrefixExpression\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  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, does not set up a memory. */\r\n  noMemory: bool = false;\r\n  /** If true, imports the memory provided by the embedder. */\r\n  importMemory: bool = false;\r\n  /** Static memory start offset. */\r\n  memoryBase: u32 = 0;\r\n  /** If true, generates information necessary for source maps. */\r\n  sourceMap: bool = false;\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\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/** Compiler interface. */\r\nexport class Compiler extends DiagnosticEmitter {\r\n\r\n  /** Program reference. */\r\n  program: Program;\r\n  /** Provided options. */\r\n  options: Options;\r\n  /** Module instance being compiled. */\r\n  module: Module;\r\n\r\n  /** Start function being compiled. */\r\n  startFunction: Function;\r\n  /** Start function statements. */\r\n  startFunctionBody: ExpressionRef[] = [];\r\n\r\n  /** Current function in compilation. */\r\n  currentFunction: 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\r\n  /** Counting memory offset. */\r\n  memoryOffset: I64;\r\n  /** Memory segments being compiled. */\r\n  memorySegments: MemorySegment[] = new Array();\r\n  /** Map of already compiled static string segments. */\r\n  stringSegments: Map<string,MemorySegment> = new Map();\r\n\r\n  /** Function table being compiled. */\r\n  functionTable: Function[] = new Array();\r\n\r\n  /** Already processed file names. */\r\n  files: Set<string> = new Set();\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    if (!options) options = new Options();\r\n    this.options = options;\r\n    this.memoryOffset = i64_new(\r\n      max(options.memoryBase, options.usizeType.byteSize) // leave space for `null`\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 wrapping top-level statements, of all files.\r\n    var startFunctionPrototype = assert(program.elementsLookup.get(\"start\"));\r\n    assert(startFunctionPrototype.kind == ElementKind.FUNCTION_PROTOTYPE);\r\n    var startFunctionInstance = new Function(\r\n      <FunctionPrototype>startFunctionPrototype,\r\n      startFunctionPrototype.internalName,\r\n      new Signature([], Type.void)\r\n    );\r\n    this.startFunction = startFunctionInstance;\r\n    this.currentFunction = startFunctionInstance;\r\n\r\n    // compile entry file(s) while traversing to 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) {\r\n        this.compileSource(sources[i]);\r\n      }\r\n    }\r\n\r\n    // compile the start function if not empty\r\n    var startFunctionBody = this.startFunctionBody;\r\n    if (startFunctionBody.length) {\r\n      let typeRef = this.ensureFunctionType(startFunctionInstance.signature);\r\n      let funcRef: FunctionRef;\r\n      module.setStart(\r\n        funcRef = module.addFunction(\r\n          startFunctionInstance.internalName,\r\n          typeRef,\r\n          typesToNativeTypes(startFunctionInstance.additionalLocals),\r\n          module.createBlock(null, startFunctionBody)\r\n        )\r\n      );\r\n      startFunctionInstance.finalize(module, funcRef);\r\n    }\r\n\r\n    // set up static memory segments and the heap base pointer\r\n    if (!options.noMemory) {\r\n      let 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      let pages = i64_shr_u(i64_align(memoryOffset, 0x10000), i64_new(16, 0));\r\n      module.setMemory(\r\n        i64_low(pages),\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\r\n    // import memory if requested\r\n    if (options.importMemory) {\r\n      module.addMemoryImport(\"0\", \"env\", \"memory\");\r\n    }\r\n\r\n    // set up function table\r\n    var functionTable = this.functionTable;\r\n    var functionTableSize = functionTable.length;\r\n    if (functionTableSize) {\r\n      let entries = new Array<FunctionRef>(functionTableSize);\r\n      for (let i = 0; i < functionTableSize; ++i) {\r\n        entries[i] = functionTable[i].ref;\r\n      }\r\n      module.setFunctionTable(entries);\r\n    }\r\n\r\n    return module;\r\n  }\r\n\r\n  // sources\r\n\r\n  compileSourceByPath(normalizedPathWithoutExtension: string, reportNode: Node): void {\r\n    var sources = this.program.sources;\r\n\r\n    // try file.ts\r\n    var expected = normalizedPathWithoutExtension + \".ts\";\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      let source = sources[i];\r\n      if (source.normalizedPath == expected) {\r\n        this.compileSource(source);\r\n        return;\r\n      }\r\n    }\r\n\r\n    // try file/index.ts\r\n    expected = normalizedPathWithoutExtension + \"/index.ts\";\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      let source = sources[i];\r\n      if (source.normalizedPath == expected) {\r\n        this.compileSource(source);\r\n        return;\r\n      }\r\n    }\r\n\r\n    // try (lib)/file.ts\r\n    expected = LIBRARY_PREFIX + normalizedPathWithoutExtension + \".ts\";\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      let source = sources[i];\r\n      if (source.normalizedPath == expected) {\r\n        this.compileSource(source);\r\n        return;\r\n      }\r\n    }\r\n\r\n    this.error(\r\n      DiagnosticCode.File_0_not_found,\r\n      reportNode.range, normalizedPathWithoutExtension\r\n    );\r\n  }\r\n\r\n  compileSource(source: Source): void {\r\n    var files = this.files;\r\n    var normalizedPath = source.normalizedPath;\r\n    if (files.has(normalizedPath)) return;\r\n    files.add(normalizedPath);\r\n\r\n    // compile top-level statements\r\n    var noTreeShaking = this.options.noTreeShaking;\r\n    var isEntry = source.isEntry;\r\n    var startFunction = this.startFunction;\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, []);\r\n          }\r\n          break;\r\n        }\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 = startFunction;\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) || global.is(CommonFlags.AMBIENT | CommonFlags.BUILTIN)) return true;\r\n    global.set(CommonFlags.COMPILED);   // ^ built-ins are compiled on use\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\r\n      // resolve now if annotated\r\n      if (declaration.type) {\r\n        let resolvedType = this.program.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.compileExpression( // reports\r\n          declaration.initializer,\r\n          Type.void,\r\n          ConversionKind.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.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    }\r\n\r\n    var nativeType = global.type.toNativeType();\r\n    var isConstant = global.isAny(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 (isConstant) {\r\n        global.set(CommonFlags.MODULE_IMPORT);\r\n        module.addGlobalImport(\r\n          global.internalName,\r\n          global.namespace\r\n            ? global.namespace.simpleName\r\n            : \"env\",\r\n          global.simpleName,\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          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\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    // inlined constant can be compiled as-is\r\n    if (global.is(CommonFlags.INLINED)) {\r\n      initExpr = this.compileInlineConstant(global, global.type, true);\r\n\r\n    } else {\r\n\r\n      // evaluate initializer if present\r\n      if (declaration.initializer) {\r\n        if (!initExpr) {\r\n          initExpr = this.compileExpression(declaration.initializer, global.type);\r\n        }\r\n\r\n        // check if the initializer is constant\r\n        if (_BinaryenExpressionGetId(initExpr) != ExpressionId.Const) {\r\n\r\n          // if a constant global, check if the initializer becomes constant after precompute\r\n          if (isConstant) {\r\n            initExpr = this.precomputeExpressionRef(initExpr);\r\n            if (_BinaryenExpressionGetId(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      // initialize to zero if there's no initializer\r\n      } else {\r\n        initExpr = global.type.toNativeZero(module);\r\n      }\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 as-is\r\n\r\n      if (isConstant) {\r\n        let exprType = _BinaryenExpressionGetType(initExpr);\r\n        switch (exprType) {\r\n          case NativeType.I32: {\r\n            global.constantValueKind = ConstantValueKind.INTEGER;\r\n            global.constantIntegerValue = i64_new(_BinaryenConstGetValueI32(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              _BinaryenConstGetValueI64Low(initExpr),\r\n              _BinaryenConstGetValueI64High(initExpr)\r\n            );\r\n            break;\r\n          }\r\n          case NativeType.F32: {\r\n            global.constantValueKind = ConstantValueKind.FLOAT;\r\n            global.constantFloatValue = _BinaryenConstGetValueF32(initExpr);\r\n            break;\r\n          }\r\n          case NativeType.F64: {\r\n            global.constantValueKind = ConstantValueKind.FLOAT;\r\n            global.constantFloatValue = _BinaryenConstGetValueF64(initExpr);\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              global.declaration.range\r\n            );\r\n            global.constantValueKind = ConstantValueKind.INTEGER;\r\n            global.constantIntegerValue = i64_new(0);\r\n            break;\r\n          }\r\n        }\r\n        global.set(CommonFlags.INLINED); // inline the value from now on\r\n        if (declaration.isTopLevel) {    // but keep the element as it might be re-exported\r\n          module.addGlobal(internalName, nativeType, false, initExpr);\r\n        }\r\n        if (declaration.range.source.isEntry && declaration.isTopLevelExport) {\r\n          module.addGlobalExport(global.internalName, declaration.programLevelInternalName);\r\n        }\r\n\r\n      } else /* mutable */ {\r\n        module.addGlobal(internalName, nativeType, !isConstant, initExpr);\r\n      }\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\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        if (val.is(CommonFlags.INLINED)) {\r\n          if (element.declaration.isTopLevelExport) {\r\n            module.addGlobal(\r\n              val.internalName,\r\n              NativeType.I32,\r\n              false, // constant\r\n              module.createI32(val.constantValue)\r\n            );\r\n          }\r\n        } else {\r\n          let initExpr: ExpressionRef;\r\n          if (valueDeclaration.value) {\r\n            initExpr = this.compileExpression(<Expression>valueDeclaration.value, Type.i32);\r\n            if (_BinaryenExpressionGetId(initExpr) != ExpressionId.Const) {\r\n              initExpr = this.precomputeExpressionRef(initExpr);\r\n              if (_BinaryenExpressionGetId(initExpr) != ExpressionId.Const) {\r\n                if (element.is(CommonFlags.CONST)) {\r\n                  this.warning(\r\n                    DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n                    valueDeclaration.range\r\n                  );\r\n                }\r\n                initInStart = true;\r\n              }\r\n            }\r\n          } else if (previousValue == null) {\r\n            initExpr = module.createI32(0);\r\n          } else if (previousValue.is(CommonFlags.INLINED)) {\r\n            initExpr = module.createI32(previousValue.constantValue + 1);\r\n          } else {\r\n            // in TypeScript this errors with TS1061, but actually we can do:\r\n            initExpr = module.createBinary(BinaryOp.AddI32,\r\n              module.createGetGlobal(previousValue.internalName, NativeType.I32),\r\n              module.createI32(1)\r\n            );\r\n            if (element.is(CommonFlags.CONST)) {\r\n              this.warning(\r\n                DiagnosticCode.Compiling_constant_with_non_constant_initializer_as_mutable,\r\n                valueDeclaration.range\r\n              );\r\n            }\r\n            initInStart = true;\r\n          }\r\n          if (initInStart) {\r\n            module.addGlobal(\r\n              val.internalName,\r\n              NativeType.I32,\r\n              true, // mutable\r\n              module.createI32(0)\r\n            );\r\n            this.startFunctionBody.push(module.createSetGlobal(val.internalName, initExpr));\r\n          } else {\r\n            module.addGlobal(val.internalName, NativeType.I32, false, initExpr);\r\n            if (_BinaryenExpressionGetType(initExpr) == NativeType.I32) {\r\n              val.constantValue = _BinaryenConstGetValueI32(initExpr);\r\n              val.set(CommonFlags.INLINED);\r\n            } else {\r\n              assert(false);\r\n              this.error(\r\n                DiagnosticCode.Operation_not_supported,\r\n                valueDeclaration.range\r\n              );\r\n              val.constantValue = 0;\r\n            }\r\n          }\r\n        }\r\n        previousValue = <EnumValue>val;\r\n\r\n        // export values if the enum is exported\r\n        if (element.declaration.range.source.isEntry && element.declaration.isTopLevelExport) {\r\n          if (member.is(CommonFlags.INLINED)) {\r\n            module.addGlobalExport(member.internalName, member.internalName);\r\n          } else if (valueDeclaration) {\r\n            this.warning(\r\n              DiagnosticCode.Cannot_export_a_mutable_global,\r\n              valueDeclaration.range\r\n            );\r\n          }\r\n        }\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 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      (<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    reportNode: Node\r\n  ): Function | null {\r\n    var instance = prototype.resolveUsingTypeArguments( // reports\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      reportNode\r\n    );\r\n    if (!(instance && this.compileFunction(instance))) return null;\r\n    return instance;\r\n  }\r\n\r\n  /** Either reuses or creates the function type matching the specified signature. */\r\n  private ensureFunctionType(signature: Signature): FunctionTypeRef {\r\n    var parameters = signature.parameterTypes;\r\n    var numParameters = parameters.length;\r\n    var thisType = signature.thisType;\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    for (let i = 0; i < numParameters; ++i, ++index) {\r\n      paramTypes[index] = signature.parameterTypes[i].toNativeType();\r\n    }\r\n    var resultType = signature.returnType.toNativeType();\r\n    var module = this.module;\r\n    var typeRef = module.getFunctionTypeBySignature(resultType, paramTypes);\r\n    if (!typeRef) {\r\n      typeRef = module.addFunctionType(signature.toSignatureString(), 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 | CommonFlags.BUILTIN) || instance.simpleName == \"abort\");\r\n    instance.set(CommonFlags.COMPILED);\r\n\r\n    // check that modifiers are matching but still compile as-is\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 typeRef = this.ensureFunctionType(instance.signature);\r\n    var module = this.module;\r\n    if (body) {\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.is(CommonFlags.ARROW));\r\n        stmt = this.compileExpression((<ExpressionStatement>body).expression, returnType);\r\n        flow.set(FlowFlags.RETURNS);\r\n      } else {\r\n        assert(body.kind == NodeKind.BLOCK);\r\n        stmt = this.compileStatement(body);\r\n        // make sure all branches return\r\n        let allBranchesReturn = flow.finalize();\r\n        if (returnType != Type.void && !allBranchesReturn) {\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      }\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    } else {\r\n      instance.set(CommonFlags.MODULE_IMPORT);\r\n\r\n      // create the function import\r\n      let namespace = instance.prototype.namespace;\r\n      ref = module.addFunctionImport(\r\n        instance.internalName,\r\n        namespace\r\n          ? namespace.simpleName\r\n          : \"env\",\r\n        instance.simpleName,\r\n        typeRef\r\n      );\r\n    }\r\n\r\n    // check module-level export\r\n    if (declaration.range.source.isEntry && declaration.isTopLevelExport) {\r\n      module.addFunctionExport(instance.internalName, declaration.name.text);\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: {\r\n          assert(false);\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            member.range\r\n          );\r\n          break;\r\n        }\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            this.compileFunctionUsingTypeArguments(\r\n              <FunctionPrototype>element,\r\n              [],\r\n              null,\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 module = this.module;\r\n    var exports = this.program.fileLevelExports;\r\n    var members = statement.members;\r\n    for (let i = 0, k = members.length; i < k; ++i) {\r\n      let member = members[i];\r\n      let internalExportName = (\r\n        statement.range.source.internalPath +\r\n        PATH_DELIMITER +\r\n        member.externalName.text\r\n      );\r\n      let element = exports.get(internalExportName);\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            let functionInstance = this.compileFunctionUsingTypeArguments(\r\n              <FunctionPrototype>element,\r\n              [],\r\n              null,\r\n              (<FunctionPrototype>element).declaration.name\r\n            );\r\n            if (functionInstance) {\r\n              let functionDeclaration = functionInstance.prototype.declaration;\r\n              if (functionDeclaration && functionDeclaration.needsExplicitExport(member)) {\r\n                module.addFunctionExport(functionInstance.internalName, member.externalName.text);\r\n              }\r\n            }\r\n          }\r\n          break;\r\n        }\r\n        case ElementKind.GLOBAL: {\r\n          if (this.compileGlobal(<Global>element) && statement.range.source.isEntry) {\r\n            let globalDeclaration = (<Global>element).declaration;\r\n            if (globalDeclaration && globalDeclaration.needsExplicitExport(member)) {\r\n              if ((<Global>element).is(CommonFlags.INLINED)) {\r\n                module.addGlobalExport(element.internalName, member.externalName.text);\r\n              } else {\r\n                this.warning(\r\n                  DiagnosticCode.Cannot_export_a_mutable_global,\r\n                  member.range\r\n                );\r\n              }\r\n            }\r\n          }\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    alternativeReportNode: Node | 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      alternativeReportNode\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 = prototype.resolveUsingTypeArguments( // reports\r\n      typeArguments,\r\n      contextualTypeArguments,\r\n      alternativeReportNode\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    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    functionTable.push(func);\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 expr: ExpressionRef;\r\n    switch (statement.kind) {\r\n      case NodeKind.BLOCK: {\r\n        expr = this.compileBlockStatement(<BlockStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.BREAK: {\r\n        expr = this.compileBreakStatement(<BreakStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.CONTINUE: {\r\n        expr = this.compileContinueStatement(<ContinueStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.DO: {\r\n        expr = this.compileDoStatement(<DoStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.EMPTY: {\r\n        expr = this.compileEmptyStatement(<EmptyStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.EXPRESSION: {\r\n        expr = this.compileExpressionStatement(<ExpressionStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.FOR: {\r\n        expr = this.compileForStatement(<ForStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.IF: {\r\n        expr = this.compileIfStatement(<IfStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.RETURN: {\r\n        expr = this.compileReturnStatement(<ReturnStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.SWITCH: {\r\n        expr = this.compileSwitchStatement(<SwitchStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.THROW: {\r\n        expr = this.compileThrowStatement(<ThrowStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.TRY: {\r\n        expr = this.compileTryStatement(<TryStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.VARIABLE: {\r\n        expr = this.compileVariableStatement(<VariableStatement>statement);\r\n        if (!expr) expr = module.createNop();\r\n        break;\r\n      }\r\n      case NodeKind.VOID: {\r\n        expr = this.compileVoidStatement(<VoidStatement>statement);\r\n        break;\r\n      }\r\n      case NodeKind.WHILE: {\r\n        expr = 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.startFunction) {\r\n          return module.createNop();\r\n        }\r\n        // otherwise fall-through\r\n      }\r\n      default: {\r\n        assert(false);\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          statement.range\r\n        );\r\n        expr = module.createUnreachable();\r\n        break;\r\n      }\r\n    }\r\n    if (this.options.sourceMap) {\r\n      addDebugLocation(expr, statement.range, module, this.currentFunction);\r\n    }\r\n    return expr;\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    for (let i = 0; i < numStatements; ++i) {\r\n      stmts[i] = this.compileStatement(statements[i]);\r\n    }\r\n    return stmts; // array of 0-es in noEmit-mode\r\n  }\r\n\r\n  compileBlockStatement(statement: BlockStatement): ExpressionRef {\r\n    var statements = statement.statements;\r\n\r\n    // NOTE that we could optimize this to a NOP if empty or unwrap a single\r\n    // statement, but that's not what the source told us to do and left to the\r\n    // optimizer.\r\n\r\n    // Not actually a branch, but can contain its own scoped variables.\r\n    var flow = this.currentFunction.flow.enterBranchOrScope();\r\n    this.currentFunction.flow = flow;\r\n\r\n    var stmt = this.module.createBlock(null, this.compileStatements(statements), NativeType.None);\r\n    var stmtReturns = flow.is(FlowFlags.RETURNS);\r\n\r\n    // Switch back to the parent flow\r\n    flow = flow.leaveBranchOrScope();\r\n    this.currentFunction.flow = flow;\r\n    if (stmtReturns) {\r\n      flow.set(FlowFlags.RETURNS);\r\n    }\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.POSSIBLY_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.POSSIBLY_CONTINUES);\r\n    return module.createBreak(continueLabel);\r\n  }\r\n\r\n  compileDoStatement(statement: DoStatement): ExpressionRef {\r\n\r\n    // A do statement does not initiate a new branch because it is executed at\r\n    // least once, but has its own break and continue labels.\r\n    var currentFunction = this.currentFunction;\r\n    var label = currentFunction.enterBreakContext();\r\n    var flow = currentFunction.flow;\r\n    var previousBreakLabel = flow.breakLabel;\r\n    var previousContinueLabel = flow.continueLabel;\r\n\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\r\n    // Reset to the previous break and continue labels, if any.\r\n    flow.breakLabel = previousBreakLabel;\r\n    flow.continueLabel = previousContinueLabel;\r\n\r\n    var module = this.module;\r\n    var condExpr = makeIsTrueish(\r\n      this.compileExpression(statement.condition, Type.i32, ConversionKind.NONE),\r\n      this.currentType,\r\n      module\r\n    );\r\n\r\n    // No need to eliminate the condition in generic contexts as the statement is executed anyway.\r\n\r\n    this.currentFunction.leaveBreakContext();\r\n\r\n    return module.createBlock(breakLabel, [\r\n      module.createLoop(continueLabel,\r\n        module.createBlock(null, [\r\n          body,\r\n          module.createBreak(continueLabel, condExpr)\r\n        ], NativeType.None))\r\n    ], NativeType.None);\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);\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\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 context = currentFunction.enterBreakContext();\r\n    var flow = currentFunction.flow.enterBranchOrScope();\r\n    currentFunction.flow = flow;\r\n    var breakLabel = flow.breakLabel = \"break|\" + context;\r\n    flow.breakLabel = breakLabel;\r\n    var continueLabel = \"continue|\" + context;\r\n    flow.continueLabel = continueLabel;\r\n\r\n    // Compile in correct order\r\n    var module = this.module;\r\n    var initializer = statement.initializer\r\n      ? this.compileStatement(<Statement>statement.initializer)\r\n      : module.createNop();\r\n    var condition = statement.condition\r\n      ? this.compileExpression(<Expression>statement.condition, Type.i32)\r\n      : module.createI32(1);\r\n    var incrementor = statement.incrementor\r\n      ? this.compileExpression(<Expression>statement.incrementor, Type.void)\r\n      : module.createNop();\r\n    var body = this.compileStatement(statement.statement);\r\n    var alwaysReturns = !statement.condition && flow.is(FlowFlags.RETURNS);\r\n    // TODO: check other always-true conditions as well, not just omitted\r\n\r\n    // Switch back to the parent flow\r\n    flow = flow.leaveBranchOrScope();\r\n    currentFunction.flow = flow;\r\n    currentFunction.leaveBreakContext();\r\n\r\n    var expr = module.createBlock(breakLabel, [\r\n      initializer,\r\n      module.createLoop(continueLabel, module.createBlock(null, [\r\n        module.createIf(condition, module.createBlock(null, [\r\n          body,\r\n          incrementor,\r\n          module.createBreak(continueLabel)\r\n        ], NativeType.None))\r\n      ], NativeType.None))\r\n    ], NativeType.None);\r\n\r\n    // If the loop is guaranteed to run and return, propagate that and append a hint\r\n    if (alwaysReturns) {\r\n      flow.set(FlowFlags.RETURNS);\r\n      expr = module.createBlock(null, [\r\n        expr,\r\n        module.createUnreachable()\r\n      ]);\r\n    }\r\n    return expr;\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 = makeIsTrueish(\r\n      this.compileExpression(statement.condition, Type.i32, ConversionKind.NONE),\r\n      this.currentType,\r\n      module\r\n    );\r\n\r\n    // Eliminate unnecesssary branches in generic contexts if the condition is constant\r\n    if (\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT) &&\r\n      _BinaryenExpressionGetId(condExpr = this.precomputeExpressionRef(condExpr)) == ExpressionId.Const &&\r\n      _BinaryenExpressionGetType(condExpr) == NativeType.I32\r\n    ) {\r\n      let ret: ExpressionRef;\r\n      if (_BinaryenConstGetValueI32(condExpr)) {\r\n        ret = this.compileStatement(ifTrue);\r\n      } else if (ifFalse) {\r\n        ret = this.compileStatement(ifFalse);\r\n      } else {\r\n        ret = module.createNop();\r\n      }\r\n      return ret;\r\n    }\r\n\r\n    // Each arm initiates a branch\r\n    var flow = currentFunction.flow.enterBranchOrScope();\r\n    currentFunction.flow = flow;\r\n    var ifTrueExpr = this.compileStatement(ifTrue);\r\n    var ifTrueReturns = flow.is(FlowFlags.RETURNS);\r\n    flow = flow.leaveBranchOrScope();\r\n    currentFunction.flow = flow;\r\n\r\n    var ifFalseExpr: ExpressionRef = 0;\r\n    var ifFalseReturns = false;\r\n    if (ifFalse) {\r\n      flow = flow.enterBranchOrScope();\r\n      currentFunction.flow = flow;\r\n      ifFalseExpr = this.compileStatement(ifFalse);\r\n      ifFalseReturns = flow.is(FlowFlags.RETURNS);\r\n      flow = flow.leaveBranchOrScope();\r\n      currentFunction.flow = flow;\r\n    }\r\n    if (ifTrueReturns && ifFalseReturns) { // not necessary to append a hint\r\n      flow.set(FlowFlags.RETURNS);\r\n    }\r\n    return module.createIf(condExpr, ifTrueExpr, ifFalseExpr);\r\n  }\r\n\r\n  compileReturnStatement(statement: ReturnStatement): ExpressionRef {\r\n    var currentFunction = this.currentFunction;\r\n    var expression: ExpressionRef = 0;\r\n    if (statement.value) {\r\n      expression = this.compileExpression(\r\n        statement.value,\r\n        currentFunction.signature.returnType\r\n      );\r\n    }\r\n\r\n    // Remember that this flow returns\r\n    currentFunction.flow.set(FlowFlags.RETURNS);\r\n\r\n    return this.module.createReturn(expression);\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    // Everything within a switch uses the same break context\r\n    var context = currentFunction.enterBreakContext();\r\n\r\n    // introduce a local for evaluating the condition (exactly once)\r\n    var tempLocal = currentFunction.getTempLocal(Type.u32);\r\n    var tempLocalIndex = tempLocal.index;\r\n    var cases = statement.cases;\r\n    var numCases = cases.length;\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)\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.i32)\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    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      let body = new Array<ExpressionRef>(1 + numStatements);\r\n      body[0] = currentBlock;\r\n\r\n      // Each switch case initiates a new branch\r\n      let flow = currentFunction.flow.enterBranchOrScope();\r\n      currentFunction.flow = flow;\r\n      let breakLabel = \"break|\" + context;\r\n      flow.breakLabel = breakLabel;\r\n\r\n      let fallsThrough = i != numCases - 1;\r\n      let nextLabel = !fallsThrough ? breakLabel : \"case\" + (i + 1).toString(10) + \"|\" + context;\r\n      for (let j = 0; j < numStatements; ++j) {\r\n        body[j + 1] = this.compileStatement(statements[j]);\r\n      }\r\n      if (!(fallsThrough || flow.is(FlowFlags.RETURNS))) {\r\n        alwaysReturns = false; // ignore fall-throughs\r\n      }\r\n\r\n      // Switch back to the parent flow\r\n      currentFunction.flow = flow.leaveBranchOrScope();\r\n\r\n      currentBlock = module.createBlock(nextLabel, body, NativeType.None);\r\n    }\r\n    currentFunction.leaveBreakContext();\r\n\r\n    // If the switch has a default and always returns, propagate that\r\n    if (defaultIndex >= 0 && alwaysReturns) {\r\n      currentFunction.flow.set(FlowFlags.RETURNS);\r\n      // Binaryen understands that so we don't need a hint\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 possibly throws\r\n    flow.set(FlowFlags.POSSIBLY_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 this.module.createUnreachable();\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.startFunction &&\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    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 init: ExpressionRef = 0;\r\n      if (declaration.type) {\r\n        type = program.resolveType( // reports\r\n          declaration.type,\r\n          currentFunction.contextualTypeArguments\r\n        );\r\n        if (!type) continue;\r\n        if (declaration.initializer) {\r\n          init = this.compileExpression(declaration.initializer, type); // reports\r\n        }\r\n      } else if (declaration.initializer) { // infer type using void/NONE for proper literal inference\r\n        init = this.compileExpression( // reports\r\n          declaration.initializer,\r\n          Type.void,\r\n          ConversionKind.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      if (declaration.is(CommonFlags.CONST)) {\r\n        if (init) {\r\n          init = this.precomputeExpressionRef(init);\r\n          if (_BinaryenExpressionGetId(init) == ExpressionId.Const) {\r\n            let local = new Local(program, name, -1, type);\r\n            switch (_BinaryenExpressionGetType(init)) {\r\n              case NativeType.I32: {\r\n                local = local.withConstantIntegerValue(_BinaryenConstGetValueI32(init), 0);\r\n                break;\r\n              }\r\n              case NativeType.I64: {\r\n                local = local.withConstantIntegerValue(\r\n                  _BinaryenConstGetValueI64Low(init),\r\n                  _BinaryenConstGetValueI64High(init)\r\n                );\r\n                break;\r\n              }\r\n              case NativeType.F32: {\r\n                local = local.withConstantFloatValue(<f64>_BinaryenConstGetValueF32(init));\r\n                break;\r\n              }\r\n              case NativeType.F64: {\r\n                local = local.withConstantFloatValue(_BinaryenConstGetValueF64(init));\r\n                break;\r\n              }\r\n              default: {\r\n                assert(false);\r\n                this.error(\r\n                  DiagnosticCode.Operation_not_supported,\r\n                  declaration.range\r\n                );\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 0;\r\n            }\r\n            scopedLocals.set(name, local);\r\n            return 0;\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 (declaration.is(CommonFlags.LET)) { // here: not top-level\r\n        currentFunction.flow.addScopedLocal(name, type, declaration.name); // reports\r\n      } else {\r\n        currentFunction.addLocal(type, name); // reports\r\n      }\r\n      if (init) {\r\n        initializers.push(this.compileAssignmentWithValue(declaration.name, init));\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, false);\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 = makeIsTrueish(\r\n      this.compileExpression(statement.condition, Type.i32, ConversionKind.NONE),\r\n      this.currentType,\r\n      module\r\n    );\r\n\r\n    // Eliminate unnecesssary loops in generic contexts if the condition is constant\r\n    if (\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT) &&\r\n      _BinaryenExpressionGetId(condExpr = this.precomputeExpressionRef(condExpr)) == ExpressionId.Const &&\r\n      _BinaryenExpressionGetType(condExpr) == NativeType.I32\r\n    ) {\r\n      if (!_BinaryenConstGetValueI32(condExpr)) {\r\n        return module.createNop();\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 flow = currentFunction.flow.enterBranchOrScope();\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 alwaysReturns = false && flow.is(FlowFlags.RETURNS);\r\n    // TODO: evaluate possible always-true conditions\r\n\r\n    // Switch back to the parent flow\r\n    currentFunction.flow = flow.leaveBranchOrScope();\r\n    currentFunction.leaveBreakContext();\r\n\r\n    var expr = module.createBlock(breakLabel, [\r\n      module.createLoop(continueLabel,\r\n        module.createIf(condExpr, module.createBlock(null, [\r\n          body,\r\n          module.createBreak(continueLabel)\r\n        ], NativeType.None))\r\n      )\r\n    ], NativeType.None);\r\n\r\n    // If the loop is guaranteed to run and return, propagate that and append a hint\r\n    if (alwaysReturns) {\r\n      expr = module.createBlock(null, [\r\n        expr,\r\n        module.createUnreachable()\r\n      ]);\r\n    }\r\n    return expr;\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        );\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        );\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.F32: {\r\n        return this.module.createF32((<VariableLikeElement>element).constantFloatValue);\r\n      }\r\n      case TypeKind.F64: {\r\n        return this.module.createF64((<VariableLikeElement>element).constantFloatValue);\r\n      }\r\n      default: {\r\n        assert(false);\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          element.declaration.range\r\n        );\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 = ConversionKind.IMPLICIT,\r\n    wrapSmallIntegers: bool = true\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, wrapSmallIntegers);\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.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.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(\r\n          <ParenthesizedExpression>expression,\r\n          contextualType,\r\n          wrapSmallIntegers\r\n        );\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, wrapSmallIntegers);\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        expr = this.module.createUnreachable();\r\n        break;\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, expression);\r\n      this.currentType = contextualType;\r\n    }\r\n\r\n    if (this.options.sourceMap) {\r\n      addDebugLocation(expr, expression.range, this.module, this.currentFunction);\r\n    }\r\n    return expr;\r\n  }\r\n\r\n  compileExpressionRetainType(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    wrapSmallIntegers: bool = true\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      wrapSmallIntegers\r\n    );\r\n  }\r\n\r\n  precomputeExpression(\r\n    expression: Expression,\r\n    contextualType: Type,\r\n    conversionKind: ConversionKind = ConversionKind.IMPLICIT\r\n  ): ExpressionRef {\r\n    return this.precomputeExpressionRef(this.compileExpression(expression, contextualType, conversionKind));\r\n  }\r\n\r\n  precomputeExpressionRef(expr: ExpressionRef): ExpressionRef {\r\n    var module = this.module;\r\n    var type = this.currentType;\r\n    var nativeType = type.toNativeType();\r\n    var typeRef = module.getFunctionTypeBySignature(nativeType, null);\r\n    var typeRefAdded = false;\r\n    if (!typeRef) {\r\n      typeRef = module.addFunctionType(type.toSignatureString(), nativeType, null);\r\n      typeRefAdded = true;\r\n    }\r\n    var funcRef = module.addFunction(\"__precompute\", typeRef, null, expr);\r\n    module.runPasses([ \"precompute\" ], funcRef);\r\n    var ret = _BinaryenFunctionGetBody(funcRef);\r\n    module.removeFunction(\"__precompute\");\r\n    if (typeRefAdded) {\r\n      // TODO: also remove the function type somehow if no longer used or make the C-API accept\r\n      // a `null` typeRef, using an implicit type.\r\n    }\r\n    return ret;\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    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      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) {\r\n      return module.createDrop(expr);\r\n    }\r\n\r\n    if (conversionKind == ConversionKind.IMPLICIT && !fromType.isAssignableTo(toType)) {\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    // TODO: make this a proper switch?\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              if (toType.is(TypeFlags.SMALL)) {\r\n                expr = makeSmallIntegerWrap(expr, toType, module);\r\n              }\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              if (toType.is(TypeFlags.SMALL)) {\r\n                expr = makeSmallIntegerWrap(expr, toType, module);\r\n              }\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              if (toType.is(TypeFlags.SMALL)) {\r\n                expr = makeSmallIntegerWrap(expr, toType, module);\r\n              }\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              if (toType.is(TypeFlags.SMALL)) {\r\n                expr = makeSmallIntegerWrap(expr, toType, module);\r\n              }\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      if (fromType.is(TypeFlags.LONG)) {\r\n\r\n        // i64 to i32\r\n        if (!toType.is(TypeFlags.LONG)) {\r\n          expr = module.createUnary(UnaryOp.WrapI64, expr); // discards upper bits\r\n          if (toType.is(TypeFlags.SMALL)) {\r\n            expr = makeSmallIntegerWrap(expr, toType, module);\r\n          }\r\n        }\r\n\r\n      // i32 to i64\r\n      } else if (toType.is(TypeFlags.LONG)) {\r\n        expr = module.createUnary(toType.is(TypeFlags.SIGNED) ? UnaryOp.ExtendI32 : UnaryOp.ExtendU32, expr);\r\n\r\n      // i32 or smaller to even smaller or same size int with change of sign\r\n      } else if (\r\n        toType.is(TypeFlags.SMALL) &&\r\n        (\r\n          fromType.size > toType.size ||\r\n          (\r\n            fromType.size == toType.size &&\r\n            fromType.is(TypeFlags.SIGNED) != toType.is(TypeFlags.SIGNED)\r\n          )\r\n        )\r\n      ) {\r\n        expr = makeSmallIntegerWrap(expr, toType, module);\r\n      }\r\n\r\n      // otherwise (smaller) i32/u32 to (same size) i32/u32\r\n    }\r\n\r\n    this.currentType = toType;\r\n    return expr;\r\n  }\r\n\r\n  compileAssertionExpression(expression: AssertionExpression, contextualType: Type): ExpressionRef {\r\n    var toType = this.program.resolveType( // reports\r\n      expression.toType,\r\n      this.currentFunction.contextualTypeArguments\r\n    );\r\n    if (!toType) return this.module.createUnreachable();\r\n    return this.compileExpression(expression.expression, toType, ConversionKind.EXPLICIT);\r\n  }\r\n\r\n  compileBinaryExpression(\r\n    expression: BinaryExpression,\r\n    contextualType: Type,\r\n    wrapSmallIntegers: bool = true\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 condExpr: ExpressionRef;\r\n    var expr: ExpressionRef;\r\n    var compound = false;\r\n    var possiblyOverflows = false;\r\n    var tempLocal: Local | null = null;\r\n\r\n    switch (expression.operator) {\r\n      case Token.LESSTHAN: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, true)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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        // TODO?\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);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\r\n          }\r\n        }\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.EXCLAMATION_EQUALS_EQUALS:\r\n        // TODO?\r\n      case Token.EXCLAMATION_EQUALS: {\r\n        leftExpr = this.compileExpressionRetainType(left, contextualType);\r\n        leftType = this.currentType;\r\n        rightExpr = this.compileExpressionRetainType(right, leftType);\r\n        rightType = this.currentType;\r\n        if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n          leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n          rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true;\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true;\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true;\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: // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\r\n          }\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(\r\n          left,\r\n          contextualType,\r\n          true // TODO: when can division remain unwrapped? does it overflow?\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true;\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: possiblyOverflows = true;\r\n          case TypeKind.U32: {\r\n            expr = module.createBinary(BinaryOp.DivU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: { // TODO: check operator overload\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            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          true // TODO: when can remainder remain unwrapped? does it overflow?\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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            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.U32:\r\n          case TypeKind.BOOL: {\r\n            expr = module.createBinary(BinaryOp.RemU32, leftExpr, rightExpr);\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: { // TODO: check operator overload\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          case TypeKind.F64: {\r\n            // TODO: internal fmod, possibly simply imported from JS\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\r\n          }\r\n          default: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          false // ^\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: possiblyOverflows = true;\r\n          default: {\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: // TODO: check operator overload\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          case TypeKind.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          true // must wrap small integers\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          true // ^\r\n        );\r\n        switch (this.currentType.kind) {\r\n          default: {\r\n            // assumes signed shr on signed small integers does not overflow\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: // assumes unsigned shr on unsigned small integers does not overflow\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: { // TODO: check operator overload\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          case TypeKind.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          true // modifies low bits of small integers if unsigned\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          true // ^\r\n        );\r\n        switch (this.currentType.kind) {\r\n          case TypeKind.I8:\r\n          case TypeKind.I16: possiblyOverflows = true;\r\n          default: {\r\n            // assumes that unsigned shr on unsigned small integers does not overflow\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: // TODO: check operator overload\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.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true; // if left or right already did\r\n          default: {\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: // TODO: check operator overload\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.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true; // if left or right already did\r\n          default: {\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: // TODO: check operator overload\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.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType,\r\n          false // retains low bits of small integers\r\n        );\r\n        if (compound) {\r\n          rightExpr = this.compileExpression(\r\n            right,\r\n            this.currentType,\r\n            ConversionKind.IMPLICIT,\r\n            false // ^\r\n          );\r\n        } else {\r\n          leftType = this.currentType;\r\n          rightExpr = this.compileExpressionRetainType(\r\n            right,\r\n            leftType,\r\n            false // ^\r\n          );\r\n          rightType = this.currentType;\r\n          if (commonType = Type.commonCompatible(leftType, rightType, false)) {\r\n            leftExpr = this.convertExpression(leftExpr, leftType, commonType, ConversionKind.IMPLICIT, left);\r\n            rightExpr = this.convertExpression(rightExpr, rightType, commonType, ConversionKind.IMPLICIT, right);\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: possiblyOverflows = true; // if left or right already did\r\n          default: {\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: // TODO: check operator overload\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.VOID: {\r\n            assert(false);\r\n            this.error(\r\n              DiagnosticCode.Operation_not_supported,\r\n              expression.range\r\n            );\r\n            expr = module.createUnreachable();\r\n            break;\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(\r\n          left,\r\n          contextualType\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          false\r\n        );\r\n\r\n        // clone left if free of side effects\r\n        expr = module.cloneExpression(leftExpr, true, 0);\r\n\r\n        // if not possible, tee left to a temp. local\r\n        if (!expr) {\r\n          tempLocal = this.currentFunction.getAndFreeTempLocal(this.currentType);\r\n          leftExpr = module.createTeeLocal(tempLocal.index, leftExpr);\r\n        }\r\n\r\n        possiblyOverflows = this.currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER);\r\n        condExpr = makeIsTrueish(leftExpr, this.currentType, module);\r\n\r\n        // simplify when cloning left without side effects was successful\r\n        if (expr) {\r\n          expr = module.createIf(\r\n            condExpr,  // left\r\n            rightExpr, //   ? right\r\n            expr       //   : cloned left\r\n          );\r\n        }\r\n\r\n        // otherwise make use of the temp. local\r\n        else {\r\n          expr = module.createIf(\r\n            condExpr,\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(\r\n          left,\r\n          contextualType\r\n        );\r\n        rightExpr = this.compileExpression(\r\n          right,\r\n          this.currentType,\r\n          ConversionKind.IMPLICIT,\r\n          false\r\n        );\r\n\r\n        // clone left if free of side effects\r\n        expr = this.module.cloneExpression(leftExpr, true, 0);\r\n\r\n        // if not possible, tee left to a temp. local\r\n        if (!expr) {\r\n          tempLocal = this.currentFunction.getAndFreeTempLocal(this.currentType);\r\n          leftExpr = module.createTeeLocal(tempLocal.index, leftExpr);\r\n        }\r\n\r\n        possiblyOverflows = this.currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER); // if right did\r\n        condExpr = makeIsTrueish(leftExpr, this.currentType, module);\r\n\r\n        // simplify when cloning left without side effects was successful\r\n        if (expr) {\r\n          expr = this.module.createIf(\r\n            condExpr, // left\r\n            expr,      //   ? cloned left\r\n            rightExpr      //   : right\r\n          );\r\n        }\r\n\r\n        // otherwise make use of the temp. local\r\n        else {\r\n          expr = module.createIf(\r\n            condExpr,\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        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          expression.range\r\n        );\r\n        expr = this.module.createUnreachable();\r\n        break;\r\n      }\r\n    }\r\n    if (possiblyOverflows && wrapSmallIntegers) {\r\n      assert(this.currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER)); // must be a small int\r\n      expr = makeSmallIntegerWrap(expr, this.currentType, module);\r\n    }\r\n    return compound\r\n      ? this.compileAssignmentWithValue(left, expr, contextualType != Type.void)\r\n      : expr;\r\n  }\r\n\r\n  compileAssignment(expression: Expression, valueExpression: Expression, contextualType: Type): ExpressionRef {\r\n    var currentFunction = this.currentFunction;\r\n    var resolved = this.program.resolveExpression(expression, currentFunction); // reports\r\n    if (!resolved) return this.module.createUnreachable();\r\n\r\n    // to compile just the value, we need to know the target's type\r\n    var element = resolved.element;\r\n    var elementType: Type;\r\n    switch (element.kind) {\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>element)) { // reports; not yet compiled if a static field compiled as a global\r\n          return this.module.createUnreachable();\r\n        }\r\n        assert((<Global>element).type != Type.void, \"concrete type expected\");\r\n        // fall-through\r\n      }\r\n      case ElementKind.LOCAL:\r\n      case ElementKind.FIELD: {\r\n        elementType = (<VariableLikeElement>element).type;\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let prototype = (<Property>element).setterPrototype;\r\n        if (prototype) {\r\n          let instance = prototype.resolve(); // reports\r\n          if (!instance) return this.module.createUnreachable();\r\n          assert(instance.signature.parameterTypes.length == 1);\r\n          elementType = 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>element).internalName\r\n        );\r\n        return this.module.createUnreachable();\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        if (expression.kind == NodeKind.ELEMENTACCESS) { // @operator(\"[]\")\r\n          if (resolved.target && resolved.target.kind == ElementKind.CLASS) {\r\n            if (element.simpleName == (<Class>resolved.target).prototype.fnIndexedGet) {\r\n              let resolvedIndexedSet = (<FunctionPrototype>element).resolve(null); // reports\r\n              if (resolvedIndexedSet) {\r\n                elementType = resolvedIndexedSet.signature.returnType;\r\n                break;\r\n              }\r\n            } else {\r\n              this.error(\r\n                DiagnosticCode.Index_signature_is_missing_in_type_0,\r\n                expression.range, (<Class>resolved.target).toString()\r\n              );\r\n              return this.module.createUnreachable();\r\n            }\r\n          }\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    var valueExpr = this.compileExpression(valueExpression, elementType);\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 resolved = this.program.resolveExpression(expression, this.currentFunction); // reports\r\n    if (!resolved) return module.createUnreachable();\r\n\r\n    var element = resolved.element;\r\n    switch (element.kind) {\r\n      case ElementKind.LOCAL: {\r\n        this.currentType = tee ? (<Local>element).type : Type.void;\r\n        if ((<Local>element).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, (<Local>element).internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        return tee\r\n          ? module.createTeeLocal((<Local>element).index, valueWithCorrectType)\r\n          : module.createSetLocal((<Local>element).index, valueWithCorrectType);\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (!this.compileGlobal(<Global>element)) return module.createUnreachable();\r\n        let type = (<Global>element).type;\r\n        assert(type != Type.void);\r\n        this.currentType = tee ? type : Type.void;\r\n        if ((<Local>element).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            (<Local>element).internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        if (tee) {\r\n          let nativeType = type.toNativeType();\r\n          let internalName = (<Global>element).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((<Global>element).internalName, valueWithCorrectType);\r\n        }\r\n      }\r\n      case ElementKind.FIELD: {\r\n        if ((<Field>element).is(CommonFlags.READONLY)) {\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>element).internalName\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n        assert(resolved.isInstanceTarget);\r\n        let targetExpr = this.compileExpression(\r\n          <Expression>resolved.targetExpression,\r\n          (<Class>resolved.target).type\r\n        );\r\n        let type = (<Field>element).type;\r\n        this.currentType = tee ? type : Type.void;\r\n        let nativeType = type.toNativeType();\r\n        if (tee) {\r\n          let tempLocal = this.currentFunction.getAndFreeTempLocal(type);\r\n          let tempLocalIndex = tempLocal.index;\r\n          // TODO: simplify if valueWithCorrectType has no side effects\r\n          return module.createBlock(null, [\r\n            module.createSetLocal(tempLocalIndex, valueWithCorrectType),\r\n            module.createStore(\r\n              type.size >> 3,\r\n              targetExpr,\r\n              module.createGetLocal(tempLocalIndex, nativeType),\r\n              nativeType,\r\n              (<Field>element).memoryOffset\r\n            ),\r\n            module.createGetLocal(tempLocalIndex, nativeType)\r\n          ], nativeType);\r\n        } else {\r\n          return module.createStore(\r\n            type.size >> 3,\r\n            targetExpr,\r\n            valueWithCorrectType,\r\n            nativeType,\r\n            (<Field>element).memoryOffset\r\n          );\r\n        }\r\n      }\r\n      case ElementKind.PROPERTY: {\r\n        let setterPrototype = (<Property>element).setterPrototype;\r\n        if (setterPrototype) {\r\n          let setterInstance = setterPrototype.resolve(); // reports\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              assert(resolved.isInstanceTarget);\r\n              let thisArg = this.compileExpression(\r\n                <Expression>resolved.targetExpression,\r\n                (<Class>resolved.target).type\r\n              );\r\n              return this.makeCallDirect(setterInstance, [ thisArg, 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>element).getterPrototype;\r\n          assert(getterPrototype != null); // must have one if there is a setter\r\n          let getterInstance = (<FunctionPrototype>getterPrototype).resolve(); // reports\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            assert(resolved.isInstanceTarget);\r\n            let thisArg = this.compileExpression(\r\n              <Expression>resolved.targetExpression,\r\n              (<Class>resolved.target).type\r\n            );\r\n            let tempLocal = this.currentFunction.getAndFreeTempLocal(returnType);\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, thisArg),\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, (<Property>element).internalName\r\n          );\r\n        }\r\n        return module.createUnreachable();\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: { // @operator(\"[]\") ?\r\n        if (expression.kind == NodeKind.ELEMENTACCESS) {\r\n          assert(resolved.isInstanceTarget);\r\n          let getterInstance = (<FunctionPrototype>element).resolve(); // reports\r\n          if (!getterInstance) return module.createUnreachable();\r\n          // obtain @operator(\"[]=\")\r\n          let setElementName = (<Class>resolved.target).prototype.fnIndexedSet;\r\n          let setElement: Element | null;\r\n          if (\r\n            setElementName != null &&\r\n            (<Class>resolved.target).members &&\r\n            (setElement = (<Map<string,Element>>(<Class>resolved.target).members).get(setElementName)) &&\r\n            setElement.kind == ElementKind.FUNCTION_PROTOTYPE\r\n          ) {\r\n            let setterInstance = (<FunctionPrototype>setElement).resolve(); // reports\r\n            if (!setterInstance) return module.createUnreachable();\r\n            let targetType = (<Class>resolved.target).type;\r\n            let targetExpr = this.compileExpression(\r\n              <Expression>resolved.targetExpression,\r\n              targetType\r\n            );\r\n            let elementExpr = this.compileExpression(\r\n              (<ElementAccessExpression>expression).elementExpression,\r\n              Type.i32\r\n            );\r\n            if (tee) {\r\n              let tempLocalTarget = this.currentFunction.getTempLocal(targetType);\r\n              let tempLocalElement = this.currentFunction.getAndFreeTempLocal(this.currentType);\r\n              let returnType = getterInstance.signature.returnType;\r\n              this.currentFunction.freeTempLocal(tempLocalTarget);\r\n              return module.createBlock(null, [\r\n                this.makeCallDirect(setterInstance, [\r\n                  module.createTeeLocal(tempLocalTarget.index, targetExpr),\r\n                  module.createTeeLocal(tempLocalElement.index, elementExpr),\r\n                  valueWithCorrectType\r\n                ]),\r\n                this.makeCallDirect(getterInstance, [\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(setterInstance, [\r\n                targetExpr,\r\n                elementExpr,\r\n                valueWithCorrectType\r\n              ]);\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>resolved.target).internalName\r\n            );\r\n            return module.createUnreachable();\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 resolved = this.program.resolveExpression(expression.expression, currentFunction); // reports\r\n    if (!resolved) return module.createUnreachable();\r\n\r\n    var element = resolved.element;\r\n    var signature: Signature | null;\r\n    var indexArg: ExpressionRef;\r\n    switch (element.kind) {\r\n\r\n      // direct call: concrete function\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        let prototype = <FunctionPrototype>element;\r\n\r\n        // builtins are compiled on the fly\r\n        if (prototype.is(CommonFlags.AMBIENT | CommonFlags.BUILTIN)) {\r\n          let expr = compileBuiltinCall( // reports\r\n            this,\r\n            prototype,\r\n            prototype.resolveBuiltinTypeArguments(\r\n              expression.typeArguments,\r\n              currentFunction.contextualTypeArguments\r\n            ),\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 module.createUnreachable();\r\n          }\r\n          return expr;\r\n\r\n        // otherwise compile to a call\r\n        } else {\r\n          let instance = prototype.resolveUsingTypeArguments( // reports\r\n            expression.typeArguments,\r\n            currentFunction.contextualTypeArguments,\r\n            expression\r\n          );\r\n          if (!instance) return module.createUnreachable();\r\n          let thisArg: ExpressionRef = 0;\r\n          if (instance.is(CommonFlags.INSTANCE)) {\r\n            assert(resolved.isInstanceTarget);\r\n            thisArg = this.compileExpression(\r\n              <Expression>resolved.targetExpression,\r\n              (<Class>resolved.target).type\r\n            );\r\n            if (!thisArg) return module.createUnreachable();\r\n          } else {\r\n            assert(!resolved.isInstanceTarget);\r\n          }\r\n          return this.compileCallDirect(instance, expression.arguments, expression, thisArg);\r\n        }\r\n      }\r\n\r\n      // indirect call: index argument with signature\r\n      case ElementKind.LOCAL: {\r\n        if (signature = (<Local>element).type.functionType) {\r\n          indexArg = module.createGetLocal((<Local>element).index, NativeType.I32);\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>element).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.GLOBAL: {\r\n        if (signature = (<Global>element).type.functionType) {\r\n          indexArg = module.createGetGlobal((<Global>element).internalName, (<Global>element).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>element).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.FIELD: {\r\n        let type = (<Field>element).type;\r\n        if (signature = type.functionType) {\r\n          let targetExpr = this.compileExpression(assert(resolved.targetExpression), type);\r\n          indexArg = module.createLoad(\r\n            4,\r\n            false,\r\n            targetExpr,\r\n            NativeType.I32,\r\n            (<Field>element).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, (<Field>element).type.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      case ElementKind.FUNCTION_TARGET: {\r\n        signature = (<FunctionTarget>element).signature;\r\n        indexArg = this.compileExpression(expression.expression, (<FunctionTarget>element).type);\r\n        break;\r\n      }\r\n      case ElementKind.PROPERTY: // TODO\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  /**\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  ): 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    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      );\r\n    }\r\n    assert(index == numArgumentsInclThis);\r\n    return this.makeCallDirect(instance, operands);\r\n  }\r\n\r\n  /** Gets the trampoline for the specified function. */\r\n  ensureTrampoline(original: Function): Function {\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.parameterTypes;\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 = maxOperands - minOperands;\r\n    assert(numOptional);\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    // append an additional parameter taking the number of optional arguments provided\r\n    var trampolineParameterTypes = new Array<Type>(maxArguments + 1);\r\n    for (let i = 0; i < maxArguments; ++i) {\r\n      trampolineParameterTypes[i] = originalParameterTypes[i];\r\n    }\r\n    trampolineParameterTypes[maxArguments] = Type.i32;\r\n\r\n    // create the trampoline element\r\n    var trampolineSignature = new Signature(trampolineParameterTypes, commonReturnType, commonThisType);\r\n    var trampolineName = originalName + \"|trampoline\";\r\n    trampolineSignature.requiredParameters = maxArguments + 1;\r\n    trampoline = new Function(original.prototype, trampolineName, trampolineSignature, original.memberOf);\r\n    trampoline.flags = original.flags;\r\n    trampoline.contextualTypeArguments = original.contextualTypeArguments;\r\n    trampoline.set(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. 'with0'\r\n    var names = new Array<string>(numNames);\r\n    for (let i = 0; i < numNames; ++i) {\r\n      let label = \"N=\" + i.toString();\r\n      names[i] = label;\r\n    }\r\n    var body = module.createBlock(names[0], [\r\n      module.createBlock(\"N=invalid\", [\r\n        module.createSwitch(names, \"N=invalid\",\r\n          module.createGetLocal(maxOperands, 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      body = module.createBlock(names[i + 1], [\r\n        body,\r\n        module.createSetLocal(operandIndex,\r\n          this.compileExpression(\r\n            assert(originalParameterDeclarations[minArguments + i].initializer),\r\n            type\r\n          )\r\n        )\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 typeRef = this.ensureFunctionType(trampolineSignature);\r\n    var funcRef = module.addFunction(trampolineName, typeRef, 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  /** Creates a direct call to the specified function. */\r\n  makeCallDirect(instance: Function, operands: ExpressionRef[] | null = null): 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    var module = this.module;\r\n    if (!this.compileFunction(instance)) return module.createUnreachable();\r\n    if (numOperands < maxOperands) {\r\n      instance = this.ensureTrampoline(instance);\r\n      if (!this.compileFunction(instance)) return module.createUnreachable();\r\n      if (!operands) {\r\n        operands = new Array(maxOperands + 1);\r\n        operands.length = 0;\r\n      }\r\n      for (let i = numArguments; i < maxArguments; ++i) {\r\n        operands.push(instance.signature.parameterTypes[i].toNativeZero(module));\r\n      }\r\n      operands.push(module.createI32(numOperands - minOperands));\r\n    }\r\n    var returnType = instance.signature.returnType;\r\n    this.currentType = returnType;\r\n    if (instance.is(CommonFlags.MODULE_IMPORT)) {\r\n      return module.createCallImport(instance.internalName, operands, returnType.toNativeType());\r\n    } else {\r\n      return module.createCall(instance.internalName, operands, returnType.toNativeType());\r\n    }\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      );\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(signature: Signature, indexArg: ExpressionRef, operands: ExpressionRef[]): ExpressionRef {\r\n    var returnType = signature.returnType;\r\n    this.currentType = returnType;\r\n    this.ensureFunctionType(signature);\r\n    return this.module.createCallIndirect(indexArg, operands, signature.toSignatureString());\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(expressions[i], Type.void);    // drop all\r\n    }\r\n    exprs[numExpressions] = this.compileExpression(expressions[numExpressions], contextualType); // except last\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 resolved = this.program.resolveElementAccess(expression, this.currentFunction); // reports\r\n    if (!resolved) return this.module.createUnreachable();\r\n\r\n    assert( // should be guaranteed by resolveElementAccess\r\n      resolved.element.kind == ElementKind.FUNCTION_PROTOTYPE &&\r\n      resolved.target &&\r\n      resolved.target.kind == ElementKind.CLASS\r\n    );\r\n    var target = <Class>resolved.target;\r\n    var instance = (<FunctionPrototype>resolved.element).resolve( // reports\r\n      null,\r\n      target.contextualTypeArguments\r\n    );\r\n    if (!instance) return this.module.createUnreachable();\r\n    var thisArg = this.compileExpression(expression.expression, target.type);\r\n    return this.compileCallDirect(instance, [\r\n      expression.elementExpression\r\n    ], expression, thisArg);\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 + \"~\" + simpleName,\r\n      declaration\r\n    );\r\n    var instance = this.compileFunctionUsingTypeArguments(\r\n      prototype,\r\n      [],\r\n      currentFunction.contextualTypeArguments,\r\n      declaration\r\n    );\r\n    if (!instance) return this.module.createUnreachable();\r\n    this.currentType = Type.u32.asFunction(instance.signature); // 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    // check special keywords first\r\n    switch (expression.kind) {\r\n      case NodeKind.NULL: {\r\n        let options = this.options;\r\n        if (!contextualType.classType) {\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 currentFunction = this.currentFunction;\r\n        if (currentFunction.is(CommonFlags.INSTANCE)) {\r\n          let parent = assert(currentFunction.memberOf);\r\n          assert(parent.kind == ElementKind.CLASS);\r\n          let thisType = (<Class>parent).type;\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 currentFunction = this.currentFunction;\r\n        if (currentFunction.is(CommonFlags.INSTANCE)) {\r\n          let parent = assert(currentFunction.memberOf);\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 resolved = this.program.resolveIdentifier( // reports\r\n      expression,\r\n      this.currentFunction,\r\n      this.currentEnum\r\n    );\r\n    if (!resolved) return module.createUnreachable();\r\n\r\n    var element = resolved.element;\r\n    switch (element.kind) {\r\n      case ElementKind.LOCAL: {\r\n        if ((<Local>element).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Local>element, contextualType, retainConstantType);\r\n        }\r\n        let localType = (<Local>element).type;\r\n        let localIndex = (<Local>element).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 (element.is(CommonFlags.AMBIENT | CommonFlags.BUILTIN)) {\r\n          return compileBuiltinGetConstant(this, <Global>element, expression);\r\n        }\r\n        if (!this.compileGlobal(<Global>element)) { // reports; not yet compiled if a static field\r\n          return this.module.createUnreachable();\r\n        }\r\n        let globalType = (<Global>element).type;\r\n        assert(globalType != Type.void);\r\n        if ((<Global>element).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Global>element, contextualType, retainConstantType);\r\n        }\r\n        this.currentType = globalType;\r\n        return this.module.createGetGlobal((<Global>element).internalName, globalType.toNativeType());\r\n      }\r\n      case ElementKind.ENUMVALUE: { // here: if referenced from within the same enum\r\n        if (!element.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>element).is(CommonFlags.INLINED)) {\r\n          return this.module.createI32((<EnumValue>element).constantValue);\r\n        }\r\n        return this.module.createGetGlobal((<EnumValue>element).internalName, NativeType.I32);\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        let instance = (<FunctionPrototype>element).resolve(\r\n          null,\r\n          this.currentFunction.contextualTypeArguments\r\n        );\r\n        if (!(instance && this.compileFunction(instance))) return module.createUnreachable();\r\n        let index = this.ensureFunctionTableEntry(instance);\r\n        this.currentType = Type.u32.asFunction(instance.signature);\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  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.classType;\r\n        if (\r\n          classType &&\r\n          classType.prototype == this.program.elementsLookup.get(\"Array\")\r\n        ) {\r\n          return this.compileStaticArray(\r\n            assert(classType.typeArguments)[0],\r\n            (<ArrayLiteralExpression>expression).elementExpressions,\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.I16: {\r\n            if (i64_is_i16(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.U8: {\r\n            if (i64_is_u8(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.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_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.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            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\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 {\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.compileStaticString((<StringLiteralExpression>expression).value);\r\n      }\r\n      // case LiteralKind.OBJECT:\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  compileStaticString(stringValue: string): ExpressionRef {\r\n    var module = this.module;\r\n    var options = this.options;\r\n    var stringSegments = this.stringSegments;\r\n\r\n    var stringSegment: MemorySegment | null = stringSegments.get(stringValue);\r\n    if (!stringSegment) {\r\n      let stringLength = stringValue.length;\r\n      let stringBuffer = new Uint8Array(4 + stringLength * 2);\r\n      stringBuffer[0] =  stringLength         & 0xff;\r\n      stringBuffer[1] = (stringLength >>>  8) & 0xff;\r\n      stringBuffer[2] = (stringLength >>> 16) & 0xff;\r\n      stringBuffer[3] = (stringLength >>> 24) & 0xff;\r\n      for (let i = 0; i < stringLength; ++i) {\r\n        stringBuffer[4 + i * 2] =  stringValue.charCodeAt(i)        & 0xff;\r\n        stringBuffer[5 + i * 2] = (stringValue.charCodeAt(i) >>> 8) & 0xff;\r\n      }\r\n      stringSegment = this.addMemorySegment(stringBuffer, options.usizeType.byteSize);\r\n      stringSegments.set(stringValue, stringSegment);\r\n    }\r\n    var stringOffset = stringSegment.offset;\r\n    var stringType = this.program.typesLookup.get(\"string\");\r\n    this.currentType = stringType ? stringType : options.usizeType;\r\n    if (options.isWasm64) {\r\n      return module.createI64(i64_low(stringOffset), i64_high(stringOffset));\r\n    }\r\n    assert(i64_is_i32(stringOffset));\r\n    return module.createI32(i64_low(stringOffset));\r\n  }\r\n\r\n  compileStaticArray(elementType: Type, expressions: (Expression | null)[], reportNode: Node): ExpressionRef {\r\n    var isStatic = true;\r\n    var module = this.module;\r\n\r\n    // obtain the array type\r\n    var arrayPrototype = assert(this.program.elementsLookup.get(\"Array\"));\r\n    if (!arrayPrototype || arrayPrototype.kind != ElementKind.CLASS_PROTOTYPE) return module.createUnreachable();\r\n    var arrayType = (<ClassPrototype>arrayPrototype).resolve([ elementType ]);\r\n    if (!arrayType) return module.createUnreachable();\r\n\r\n    var elementSize = expressions.length;\r\n    var nativeType = elementType.toNativeType();\r\n    var values: usize;\r\n    var memorySize: usize;\r\n    switch (nativeType) {\r\n      case NativeType.I32: {\r\n        values = changetype<usize>(new Int32Array(elementSize));\r\n        memorySize = elementSize * 4;\r\n        break;\r\n      }\r\n      case NativeType.I64: {\r\n        values = changetype<usize>(new Array<I64>(elementSize));\r\n        memorySize = elementSize * 8;\r\n        break;\r\n      }\r\n      case NativeType.F32: {\r\n        values = changetype<usize>(new Float32Array(elementSize));\r\n        memorySize = elementSize * 4;\r\n        break;\r\n      }\r\n      case NativeType.F64: {\r\n        values = changetype<usize>(new Float64Array(elementSize));\r\n        memorySize = elementSize * 8;\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        this.error(\r\n          DiagnosticCode.Operation_not_supported,\r\n          reportNode.range\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n    }\r\n\r\n    // precompute value expressions\r\n    var exprs = new Array<ExpressionRef>(elementSize);\r\n    var expr: BinaryenExpressionRef;\r\n    for (let i = 0; i < elementSize; ++i) {\r\n      exprs[i] = expressions[i]\r\n        ? this.compileExpression(<Expression>expressions[i], elementType)\r\n        : elementType.toNativeZero(module);\r\n      if (isStatic) {\r\n        expr = this.precomputeExpressionRef(exprs[i]);\r\n        if (_BinaryenExpressionGetId(expr) == ExpressionId.Const) {\r\n          assert(_BinaryenExpressionGetType(expr) == nativeType);\r\n          switch (nativeType) {\r\n            case NativeType.I32: {\r\n              changetype<i32[]>(values)[i] = _BinaryenConstGetValueI32(expr);\r\n              break;\r\n            }\r\n            case NativeType.I64: {\r\n              changetype<I64[]>(values)[i] = i64_new(\r\n                _BinaryenConstGetValueI64Low(expr),\r\n                _BinaryenConstGetValueI64High(expr)\r\n              );\r\n              break;\r\n            }\r\n            case NativeType.F32: {\r\n              changetype<f32[]>(values)[i] = _BinaryenConstGetValueF32(expr);\r\n              break;\r\n            }\r\n            case NativeType.F64: {\r\n              changetype<f64[]>(values)[i] = _BinaryenConstGetValueF64(expr);\r\n              break;\r\n            }\r\n            default: {\r\n              assert(false); // checked above\r\n            }\r\n          }\r\n        } else {\r\n          // TODO: emit a warning if declared 'const'\r\n          isStatic = false;\r\n        }\r\n      }\r\n    }\r\n\r\n    var usizeTypeSize = this.options.usizeType.byteSize;\r\n    var headerSize = usizeTypeSize + 4 + 4; // memory + capacity + length\r\n\r\n    if (isStatic) {\r\n      let buffer = new Uint8Array(headerSize + memorySize);\r\n      let segment = this.addMemorySegment(buffer);\r\n\r\n      // make header\r\n      let offset = 0;\r\n      if (usizeTypeSize == 8) {\r\n        writeI64(i64_add(segment.offset, i64_new(headerSize)), buffer, 0); // memory\r\n      } else {\r\n        assert(i64_high(segment.offset) == 0);\r\n        writeI32(i64_low(segment.offset) + headerSize, buffer, 0); // memory\r\n      }\r\n      offset += usizeTypeSize;\r\n      writeI32(elementSize, buffer, offset); // capacity\r\n      offset += 4;\r\n      writeI32(elementSize, buffer, offset); // length\r\n      offset += 4;\r\n      assert(offset == headerSize);\r\n\r\n      // make memory\r\n      switch (nativeType) {\r\n        case NativeType.I32: {\r\n          for (let i = 0; i < elementSize; ++i) {\r\n            writeI32(changetype<i32[]>(values)[i], buffer, offset); offset += 4;\r\n          }\r\n          break;\r\n        }\r\n        case NativeType.I64: {\r\n          for (let i = 0; i < elementSize; ++i) {\r\n            writeI64(changetype<I64[]>(values)[i], buffer, offset); offset += 8;\r\n          }\r\n          break;\r\n        }\r\n        case NativeType.F32: {\r\n          for (let i = 0; i < elementSize; ++i) {\r\n            writeF32(changetype<f32[]>(values)[i], buffer, offset); offset += 4;\r\n          }\r\n          break;\r\n        }\r\n        case NativeType.F64: {\r\n          for (let i = 0; i < elementSize; ++i) {\r\n            writeF64(changetype<f64[]>(values)[i], buffer, offset); offset += 8;\r\n          }\r\n          break;\r\n        }\r\n        default: {\r\n          assert(false);\r\n          this.error(\r\n            DiagnosticCode.Operation_not_supported,\r\n            reportNode.range\r\n          );\r\n          return module.createUnreachable();\r\n        }\r\n      }\r\n      assert(offset == headerSize + memorySize);\r\n      this.currentType = arrayType.type;\r\n      return usizeTypeSize == 8\r\n        ? module.createI64(\r\n            i64_low(segment.offset),\r\n            i64_high(segment.offset)\r\n          )\r\n        : module.createI32(\r\n            i64_low(segment.offset)\r\n          );\r\n    } else {\r\n      // TODO: static elements *could* go into data segments while dynamic ones are initialized\r\n      // on top? any benefits?\r\n      throw new Error(\"not implemented\");\r\n    }\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    var resolved = this.program.resolveExpression( // reports\r\n      expression.expression,\r\n      currentFunction\r\n    );\r\n    if (resolved) {\r\n      if (resolved.element.kind == ElementKind.CLASS_PROTOTYPE) {\r\n        let prototype = <ClassPrototype>resolved.element;\r\n        let instance = prototype.resolveUsingTypeArguments( // reports\r\n          expression.typeArguments,\r\n          null,\r\n          expression\r\n        );\r\n        if (instance) {\r\n          let thisExpr = compileBuiltinAllocate(this, instance, expression);\r\n          let initializers = new Array<ExpressionRef>();\r\n\r\n          // use a temp local for 'this'\r\n          let tempLocal = currentFunction.getTempLocal(options.usizeType);\r\n          initializers.push(module.createSetLocal(tempLocal.index, thisExpr));\r\n\r\n          // apply field initializers\r\n          if (instance.members) {\r\n            for (let member of instance.members.values()) {\r\n              if (member.kind == ElementKind.FIELD) {\r\n                let field = <Field>member;\r\n                let fieldDeclaration = field.prototype.declaration;\r\n                if (field.is(CommonFlags.CONST)) {\r\n                  assert(false); // there are no built-in fields currently\r\n                } else if (fieldDeclaration && fieldDeclaration.initializer) {\r\n                  initializers.push(module.createStore(field.type.byteSize,\r\n                    module.createGetLocal(tempLocal.index, options.nativeSizeType),\r\n                    this.compileExpression(fieldDeclaration.initializer, field.type),\r\n                    field.type.toNativeType(),\r\n                    field.memoryOffset\r\n                  ));\r\n                }\r\n              }\r\n            }\r\n          }\r\n\r\n          // apply constructor\r\n          let constructorInstance = instance.constructorInstance;\r\n          if (constructorInstance) {\r\n            initializers.push(this.compileCallDirect(constructorInstance, expression.arguments, expression,\r\n              module.createGetLocal(tempLocal.index, options.nativeSizeType)\r\n            ));\r\n          }\r\n\r\n          // return 'this'\r\n          initializers.push(module.createGetLocal(tempLocal.index, options.nativeSizeType));\r\n          currentFunction.freeTempLocal(tempLocal);\r\n          thisExpr = module.createBlock(null, initializers, options.nativeSizeType);\r\n\r\n          this.currentType = instance.type;\r\n          return thisExpr;\r\n        }\r\n      } else {\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      }\r\n    }\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  compileParenthesizedExpression(\r\n    expression: ParenthesizedExpression,\r\n    contextualType: Type,\r\n    wrapSmallIntegers: bool = true\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      wrapSmallIntegers\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 program = this.program;\r\n    var module = this.module;\r\n\r\n    var resolved = program.resolvePropertyAccess(propertyAccess, this.currentFunction); // reports\r\n    if (!resolved) return module.createUnreachable();\r\n\r\n    var element = resolved.element;\r\n    var targetExpr: ExpressionRef;\r\n    switch (element.kind) {\r\n      case ElementKind.GLOBAL: { // static property\r\n        if (element.is(CommonFlags.AMBIENT | CommonFlags.BUILTIN)) {\r\n          return compileBuiltinGetConstant(this, <Global>element, propertyAccess);\r\n        }\r\n        if (!this.compileGlobal(<Global>element)) { // reports; not yet compiled if a static field\r\n          return module.createUnreachable();\r\n        }\r\n        let globalType = (<Global>element).type;\r\n        assert(globalType != Type.void);\r\n        if ((<Global>element).is(CommonFlags.INLINED)) {\r\n          return this.compileInlineConstant(<Global>element, contextualType, retainConstantType);\r\n        }\r\n        this.currentType = globalType;\r\n        return module.createGetGlobal((<Global>element).internalName, globalType.toNativeType());\r\n      }\r\n      case ElementKind.ENUMVALUE: { // enum value\r\n        if (!this.compileEnum((<EnumValue>element).enum)) {\r\n          return this.module.createUnreachable();\r\n        }\r\n        this.currentType = Type.i32;\r\n        if ((<EnumValue>element).is(CommonFlags.INLINED)) {\r\n          return module.createI32((<EnumValue>element).constantValue);\r\n        }\r\n        return module.createGetGlobal((<EnumValue>element).internalName, NativeType.I32);\r\n      }\r\n      case ElementKind.FIELD: { // instance field\r\n        assert(resolved.isInstanceTarget);\r\n        assert((<Field>element).memoryOffset >= 0);\r\n        targetExpr = this.compileExpression(\r\n          <Expression>resolved.targetExpression,\r\n          this.options.usizeType,\r\n          ConversionKind.NONE\r\n        );\r\n        this.currentType = (<Field>element).type;\r\n        return module.createLoad(\r\n          (<Field>element).type.size >> 3,\r\n          (<Field>element).type.is(TypeFlags.SIGNED | TypeFlags.INTEGER),\r\n          targetExpr,\r\n          (<Field>element).type.toNativeType(),\r\n          (<Field>element).memoryOffset\r\n        );\r\n      }\r\n      case ElementKind.PROPERTY: { // instance property (here: getter)\r\n        let prototype = (<Property>element).getterPrototype;\r\n        if (prototype) {\r\n          let instance = prototype.resolve(null); // reports\r\n          if (!instance) return 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            propertyAccess\r\n          )) {\r\n            return module.createUnreachable();\r\n          }\r\n          if (instance.is(CommonFlags.INSTANCE)) {\r\n            let parent = assert(instance.memberOf);\r\n            assert(parent.kind == ElementKind.CLASS);\r\n            targetExpr = this.compileExpression(\r\n              <Expression>resolved.targetExpression,\r\n              (<Class>parent).type\r\n            );\r\n            this.currentType = signature.returnType;\r\n            return this.compileCallDirect(instance, [], propertyAccess, targetExpr);\r\n          } else {\r\n            this.currentType = signature.returnType;\r\n            return this.compileCallDirect(instance, [], propertyAccess);\r\n          }\r\n        } else {\r\n          this.error(\r\n            DiagnosticCode.Property_0_does_not_exist_on_type_1,\r\n            propertyAccess.range, (<Property>element).simpleName, (<Property>element).parent.toString()\r\n          );\r\n          return module.createUnreachable();\r\n        }\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  compileTernaryExpression(expression: TernaryExpression, contextualType: Type): ExpressionRef {\r\n    var ifThen = expression.ifThen;\r\n    var ifElse = expression.ifElse;\r\n\r\n    var condExpr = makeIsTrueish(\r\n      this.compileExpression(expression.condition, Type.u32, ConversionKind.NONE),\r\n      this.currentType,\r\n      this.module\r\n    );\r\n\r\n    // Eliminate unnecesssary branches in generic contexts if the condition is constant\r\n    if (\r\n      this.currentFunction.isAny(CommonFlags.GENERIC | CommonFlags.GENERIC_CONTEXT) &&\r\n      _BinaryenExpressionGetId(condExpr = this.precomputeExpressionRef(condExpr)) == ExpressionId.Const &&\r\n      _BinaryenExpressionGetType(condExpr) == NativeType.I32\r\n    ) {\r\n      return _BinaryenConstGetValueI32(condExpr)\r\n        ? this.compileExpression(ifThen, contextualType)\r\n        : this.compileExpression(ifElse, contextualType);\r\n    }\r\n\r\n    var ifThenExpr = this.compileExpression(ifThen, contextualType);\r\n    var ifElseExpr = this.compileExpression(ifElse, contextualType);\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(\r\n      expression.operand,\r\n      contextualType == Type.void\r\n        ? Type.i32\r\n        : contextualType,\r\n      ConversionKind.NONE,\r\n      false // wrapped below\r\n    );\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    var possiblyOverflows = false;\r\n\r\n    switch (expression.operator) {\r\n      case Token.PLUS_PLUS: {\r\n        if (currentType.isReference) {\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        switch (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: possiblyOverflows = true;\r\n          default: {\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          case TypeKind.VOID: {\r\n            assert(false);\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        break;\r\n      }\r\n      case Token.MINUS_MINUS: {\r\n        if (currentType.isReference) {\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        switch (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: possiblyOverflows = true;\r\n          default: {\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          case TypeKind.VOID: {\r\n            assert(false);\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        break;\r\n      }\r\n      default: {\r\n        assert(false);\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\r\n    var setValue: ExpressionRef;\r\n    var tempLocal: Local | null = null;\r\n\r\n    // simplify if dropped anyway\r\n    if (contextualType == Type.void) {\r\n      setValue = module.createBinary(op,\r\n        getValue,\r\n        nativeOne\r\n      );\r\n\r\n    // otherwise use a temp local for the intermediate value\r\n    } else {\r\n      tempLocal = currentFunction.getTempLocal(currentType);\r\n      setValue = module.createBinary(op,\r\n        this.module.createGetLocal(tempLocal.index, nativeType),\r\n        nativeOne\r\n      );\r\n    }\r\n\r\n    if (possiblyOverflows) {\r\n      assert(currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER));\r\n      setValue = makeSmallIntegerWrap(setValue, currentType, module);\r\n    }\r\n\r\n    setValue = this.compileAssignmentWithValue(expression.operand, setValue, false);\r\n    // ^ sets currentType = void\r\n    if (contextualType == Type.void) {\r\n      assert(!tempLocal);\r\n      return setValue;\r\n    }\r\n\r\n    this.currentType = assert(tempLocal).type;\r\n    currentFunction.freeTempLocal(<Local>tempLocal);\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);\r\n  }\r\n\r\n  compileUnaryPrefixExpression(\r\n    expression: UnaryPrefixExpression,\r\n    contextualType: Type,\r\n    wrapSmallIntegers: bool = true\r\n  ): ExpressionRef {\r\n    var module = this.module;\r\n    var currentType = this.currentType;\r\n\r\n    var possiblyOverflows = false;\r\n    var compound = false;\r\n    var expr: ExpressionRef;\r\n\r\n    switch (expression.operator) {\r\n      case Token.PLUS: {\r\n        if (currentType.isReference) {\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        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          false // wrapped below\r\n        );\r\n        currentType = this.currentType;\r\n        possiblyOverflows = currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER); // if operand already did\r\n        break;\r\n      }\r\n      case Token.MINUS: {\r\n        if (currentType.isReference) {\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        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          if (this.options.sourceMap) {\r\n            // compileExpression normally does this\r\n            addDebugLocation(expr, expression.range, module, this.currentFunction);\r\n          }\r\n          currentType = this.currentType;\r\n        } else {\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            false // wrapped below\r\n          );\r\n          currentType = this.currentType;\r\n          switch (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: possiblyOverflows = true; // or if operand already did\r\n            default: {\r\n              expr = module.createBinary(BinaryOp.SubI32, module.createI32(0), expr);\r\n              break;\r\n            }\r\n            case TypeKind.USIZE: {\r\n              if (currentType.isReference) {\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              // fall-through\r\n            }\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                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          }\r\n        }\r\n        break;\r\n      }\r\n      case Token.PLUS_PLUS: {\r\n        if (currentType.isReference) {\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        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          false // wrapped below\r\n        );\r\n        currentType = this.currentType;\r\n        switch (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: possiblyOverflows = true; // or if operand already did\r\n          default: {\r\n            expr = module.createBinary(BinaryOp.AddI32, expr, this.module.createI32(1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            if (currentType.isReference) {\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            // fall-through\r\n          }\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              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        }\r\n        break;\r\n      }\r\n      case Token.MINUS_MINUS: {\r\n        if (currentType.isReference) {\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        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          false // wrapped below\r\n        );\r\n        currentType = this.currentType;\r\n        switch (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: possiblyOverflows = true; // or if operand already did\r\n          default: {\r\n            expr = module.createBinary(BinaryOp.SubI32, expr, module.createI32(1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            if (currentType.isReference) {\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            // fall-through\r\n          }\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              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        }\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          true // must wrap small integers\r\n        );\r\n        expr = makeIsFalseish(expr, this.currentType, module);\r\n        this.currentType = Type.bool;\r\n        break;\r\n      }\r\n      case Token.TILDE: {\r\n        if (currentType.isReference) {\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        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          contextualType == Type.void\r\n            ? ConversionKind.NONE\r\n            : ConversionKind.IMPLICIT,\r\n          false // retains low bits of small integers\r\n        );\r\n        currentType = this.currentType;\r\n        switch (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: possiblyOverflows = true; // or if operand already did\r\n          default: {\r\n            expr = module.createBinary(BinaryOp.XorI32, expr, module.createI32(-1));\r\n            break;\r\n          }\r\n          case TypeKind.USIZE: {\r\n            if (currentType.isReference) {\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            // fall-through\r\n          }\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              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        }\r\n        break;\r\n      }\r\n      case Token.TYPEOF: {\r\n        // it might make sense to implement typeof in a way that a generic function can detect\r\n        // whether its type argument is a class type or string. that could then be used, for\r\n        // example, to generate hash codes for sets and maps, depending on the kind of type\r\n        // parameter we have. ideally the comparison would not involve actual string comparison and\r\n        // limit available operations to hard-coded string literals.\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        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    if (possiblyOverflows && wrapSmallIntegers) {\r\n      assert(currentType.is(TypeFlags.SMALL | TypeFlags.INTEGER));\r\n      expr = makeSmallIntegerWrap(expr, currentType, module);\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\r\n// helpers\r\n\r\n/** Adds the debug location of the specified expression at the specified range to the source map. */\r\nfunction addDebugLocation(expr: ExpressionRef, range: Range, module: Module, currentFunction: Function): void {\r\n  var source = range.source;\r\n  if (source.debugInfoIndex < 0) {\r\n    source.debugInfoIndex = module.addDebugInfoFile(source.normalizedPath);\r\n  }\r\n  range.debugInfoRef = expr;\r\n  if (!currentFunction.debugLocations) currentFunction.debugLocations = [];\r\n  currentFunction.debugLocations.push(range);\r\n}\r\n\r\n/** Wraps a 32-bit integer expression so it evaluates to a valid value of the specified type. */\r\nexport function makeSmallIntegerWrap(expr: ExpressionRef, type: Type, module: Module): ExpressionRef {\r\n  switch (type.kind) {\r\n    case TypeKind.I8: {\r\n      return 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    case TypeKind.I16: {\r\n      return 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    case TypeKind.U8: {\r\n      return module.createBinary(BinaryOp.AndI32,\r\n        expr,\r\n        module.createI32(0xff)\r\n      );\r\n    }\r\n    case TypeKind.U16: {\r\n      return module.createBinary(BinaryOp.AndI32,\r\n        expr,\r\n        module.createI32(0xffff)\r\n      );\r\n    }\r\n    case TypeKind.BOOL: {\r\n      return module.createBinary(BinaryOp.AndI32,\r\n        expr,\r\n        module.createI32(0x1)\r\n      );\r\n    }\r\n    default: {\r\n      assert(false);\r\n      return expr;\r\n    }\r\n  }\r\n}\r\n\r\n/** Creates a comparison whether an expression is not 'true' in a broader sense. */\r\nexport function makeIsFalseish(expr: ExpressionRef, type: Type, module: Module): ExpressionRef {\r\n  switch (type.kind) {\r\n    default: { // any native i32\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    case TypeKind.VOID: {\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\nexport function makeIsTrueish(expr: ExpressionRef, type: Type, module: Module): ExpressionRef {\r\n  switch (type.kind) {\r\n    default: { // any native i32\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    case TypeKind.VOID: {\r\n      assert(false);\r\n      return module.createI32(0);\r\n    }\r\n  }\r\n}\r\n","/**\n * Generated from diagnosticsMessages.json. Do not edit.\n * @module diagnostics\n *//***/\n\n/* tslint:disable:max-line-length */\n\n/** Enum of available diagnostic codes. */\nexport enum DiagnosticCode {\n  Operation_not_supported = 100,\n  Operation_is_unsafe = 101,\n  Conversion_from_type_0_to_1_requires_an_explicit_cast = 200,\n  Conversion_from_type_0_to_1_will_require_an_explicit_cast_when_switching_between_32_64_bit = 201,\n  Type_0_cannot_be_changed_to_type_1 = 202,\n  Type_0_cannot_be_reinterpreted_as_type_1 = 203,\n  Basic_type_0_cannot_be_nullable = 204,\n  Cannot_export_a_mutable_global = 205,\n  Compiling_constant_with_non_constant_initializer_as_mutable = 206,\n  Structs_cannot_extend_classes_and_vice_versa = 207,\n  Structs_cannot_implement_interfaces = 208,\n  Invalid_regular_expression_flags = 209,\n  Implementation_0_must_match_the_signature_1 = 210,\n  Unterminated_string_literal = 1002,\n  Identifier_expected = 1003,\n  _0_expected = 1005,\n  A_file_cannot_have_a_reference_to_itself = 1006,\n  Trailing_comma_not_allowed = 1009,\n  Unexpected_token = 1012,\n  A_rest_parameter_must_be_last_in_a_parameter_list = 1014,\n  Parameter_cannot_have_question_mark_and_initializer = 1015,\n  A_required_parameter_cannot_follow_an_optional_parameter = 1016,\n  Enum_member_must_have_initializer = 1061,\n  Statements_are_not_allowed_in_ambient_contexts = 1036,\n  Initializers_are_not_allowed_in_ambient_contexts = 1039,\n  _0_modifier_cannot_be_used_here = 1042,\n  A_rest_parameter_cannot_be_optional = 1047,\n  A_rest_parameter_cannot_have_an_initializer = 1048,\n  A_set_accessor_must_have_exactly_one_parameter = 1049,\n  A_set_accessor_parameter_cannot_have_an_initializer = 1052,\n  A_get_accessor_cannot_have_parameters = 1054,\n  Type_parameters_cannot_appear_on_a_constructor_declaration = 1092,\n  Type_annotation_cannot_appear_on_a_constructor_declaration = 1093,\n  An_accessor_cannot_have_type_parameters = 1094,\n  A_set_accessor_cannot_have_a_return_type_annotation = 1095,\n  Type_parameter_list_cannot_be_empty = 1098,\n  A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement = 1104,\n  A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement = 1105,\n  A_return_statement_can_only_be_used_within_a_function_body = 1108,\n  Expression_expected = 1109,\n  Type_expected = 1110,\n  A_default_clause_cannot_appear_more_than_once_in_a_switch_statement = 1113,\n  Duplicate_label_0 = 1114,\n  Octal_literals_are_not_allowed_in_strict_mode = 1121,\n  Digit_expected = 1124,\n  Hexadecimal_digit_expected = 1125,\n  Unexpected_end_of_text = 1126,\n  Invalid_character = 1127,\n  _case_or_default_expected = 1130,\n  A_declare_modifier_cannot_be_used_in_an_already_ambient_context = 1038,\n  Type_argument_expected = 1140,\n  String_literal_expected = 1141,\n  Line_break_not_permitted_here = 1142,\n  Declaration_expected = 1146,\n  _const_declarations_must_be_initialized = 1155,\n  Unterminated_regular_expression_literal = 1161,\n  Binary_digit_expected = 1177,\n  Octal_digit_expected = 1178,\n  An_implementation_cannot_be_declared_in_ambient_contexts = 1183,\n  An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive = 1198,\n  Unterminated_Unicode_escape_sequence = 1199,\n  Decorators_are_not_valid_here = 1206,\n  _abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration = 1242,\n  A_class_may_only_extend_another_class = 1311,\n  Duplicate_identifier_0 = 2300,\n  Cannot_find_name_0 = 2304,\n  Module_0_has_no_exported_member_1 = 2305,\n  Generic_type_0_requires_1_type_argument_s = 2314,\n  Type_0_is_not_generic = 2315,\n  Type_0_is_not_assignable_to_type_1 = 2322,\n  Index_signature_is_missing_in_type_0 = 2329,\n  _this_cannot_be_referenced_in_current_location = 2332,\n  _super_can_only_be_referenced_in_a_derived_class = 2335,\n  Property_0_does_not_exist_on_type_1 = 2339,\n  Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures = 2349,\n  Cannot_use_new_with_an_expression_whose_type_lacks_a_construct_signature = 2351,\n  A_function_whose_declared_type_is_not_void_must_return_a_value = 2355,\n  The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_or_a_property_access = 2357,\n  The_left_hand_side_of_an_assignment_expression_must_be_a_variable_or_a_property_access = 2364,\n  Operator_0_cannot_be_applied_to_types_1_and_2 = 2365,\n  _get_and_set_accessor_must_have_the_same_type = 2380,\n  Constructor_implementation_is_missing = 2390,\n  Function_implementation_is_missing_or_not_immediately_following_the_declaration = 2391,\n  Multiple_constructor_implementations_are_not_allowed = 2392,\n  Duplicate_function_implementation = 2393,\n  Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local = 2395,\n  The_0_operator_cannot_be_applied_to_type_1 = 2469,\n  Export_declaration_conflicts_with_exported_declaration_of_0 = 2484,\n  Cannot_assign_to_0_because_it_is_a_constant_or_a_read_only_property = 2540,\n  The_target_of_an_assignment_must_be_a_variable_or_a_property_access = 2541,\n  Index_signature_in_type_0_only_permits_reading = 2542,\n  Expected_0_arguments_but_got_1 = 2554,\n  Expected_at_least_0_arguments_but_got_1 = 2555,\n  Expected_0_type_arguments_but_got_1 = 2558,\n  A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums = 2651,\n  Namespace_0_has_no_exported_member_1 = 2694,\n  File_0_not_found = 6054\n}\n\n/** Translates a diagnostic code to its respective string. */\nexport function diagnosticCodeToString(code: DiagnosticCode): string {\n  switch (code) {\n    case 100: return \"Operation not supported.\";\n    case 101: return \"Operation is unsafe.\";\n    case 200: return \"Conversion from type '{0}' to '{1}' requires an explicit cast.\";\n    case 201: return \"Conversion from type '{0}' to '{1}' will require an explicit cast when switching between 32/64-bit.\";\n    case 202: return \"Type '{0}' cannot be changed to type '{1}'.\";\n    case 203: return \"Type '{0}' cannot be reinterpreted as type '{1}'.\";\n    case 204: return \"Basic type '{0}' cannot be nullable.\";\n    case 205: return \"Cannot export a mutable global.\";\n    case 206: return \"Compiling constant with non-constant initializer as mutable.\";\n    case 207: return \"Structs cannot extend classes and vice-versa.\";\n    case 208: return \"Structs cannot implement interfaces.\";\n    case 209: return \"Invalid regular expression flags.\";\n    case 210: return \"Implementation '{0}' must match the signature '{1}'.\";\n    case 1002: return \"Unterminated string literal.\";\n    case 1003: return \"Identifier expected.\";\n    case 1005: return \"'{0}' expected.\";\n    case 1006: return \"A file cannot have a reference to itself.\";\n    case 1009: return \"Trailing comma not allowed.\";\n    case 1012: return \"Unexpected token.\";\n    case 1014: return \"A rest parameter must be last in a parameter list.\";\n    case 1015: return \"Parameter cannot have question mark and initializer.\";\n    case 1016: return \"A required parameter cannot follow an optional parameter.\";\n    case 1061: return \"Enum member must have initializer.\";\n    case 1036: return \"Statements are not allowed in ambient contexts.\";\n    case 1039: return \"Initializers are not allowed in ambient contexts.\";\n    case 1042: return \"'{0}' modifier cannot be used here.\";\n    case 1047: return \"A rest parameter cannot be optional.\";\n    case 1048: return \"A rest parameter cannot have an initializer.\";\n    case 1049: return \"A 'set' accessor must have exactly one parameter.\";\n    case 1052: return \"A 'set' accessor parameter cannot have an initializer.\";\n    case 1054: return \"A 'get' accessor cannot have parameters.\";\n    case 1092: return \"Type parameters cannot appear on a constructor declaration.\";\n    case 1093: return \"Type annotation cannot appear on a constructor declaration.\";\n    case 1094: return \"An accessor cannot have type parameters.\";\n    case 1095: return \"A 'set' accessor cannot have a return type annotation.\";\n    case 1098: return \"Type parameter list cannot be empty.\";\n    case 1104: return \"A 'continue' statement can only be used within an enclosing iteration statement.\";\n    case 1105: return \"A 'break' statement can only be used within an enclosing iteration or switch statement.\";\n    case 1108: return \"A 'return' statement can only be used within a function body.\";\n    case 1109: return \"Expression expected.\";\n    case 1110: return \"Type expected.\";\n    case 1113: return \"A 'default' clause cannot appear more than once in a 'switch' statement.\";\n    case 1114: return \"Duplicate label '{0}'.\";\n    case 1121: return \"Octal literals are not allowed in strict mode.\";\n    case 1124: return \"Digit expected.\";\n    case 1125: return \"Hexadecimal digit expected.\";\n    case 1126: return \"Unexpected end of text.\";\n    case 1127: return \"Invalid character.\";\n    case 1130: return \"'case' or 'default' expected.\";\n    case 1038: return \"A 'declare' modifier cannot be used in an already ambient context.\";\n    case 1140: return \"Type argument expected.\";\n    case 1141: return \"String literal expected.\";\n    case 1142: return \"Line break not permitted here.\";\n    case 1146: return \"Declaration expected.\";\n    case 1155: return \"'const' declarations must be initialized.\";\n    case 1161: return \"Unterminated regular expression literal.\";\n    case 1177: return \"Binary digit expected.\";\n    case 1178: return \"Octal digit expected.\";\n    case 1183: return \"An implementation cannot be declared in ambient contexts.\";\n    case 1198: return \"An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive.\";\n    case 1199: return \"Unterminated Unicode escape sequence.\";\n    case 1206: return \"Decorators are not valid here.\";\n    case 1242: return \"'abstract' modifier can only appear on a class, method, or property declaration.\";\n    case 1311: return \"A class may only extend another class.\";\n    case 2300: return \"Duplicate identifier '{0}'.\";\n    case 2304: return \"Cannot find name '{0}'.\";\n    case 2305: return \"Module '{0}' has no exported member '{1}'.\";\n    case 2314: return \"Generic type '{0}' requires {1} type argument(s).\";\n    case 2315: return \"Type '{0}' is not generic.\";\n    case 2322: return \"Type '{0}' is not assignable to type '{1}'.\";\n    case 2329: return \"Index signature is missing in type '{0}'.\";\n    case 2332: return \"'this' cannot be referenced in current location.\";\n    case 2335: return \"'super' can only be referenced in a derived class.\";\n    case 2339: return \"Property '{0}' does not exist on type '{1}'.\";\n    case 2349: return \"Cannot invoke an expression whose type lacks a call signature. Type '{0}' has no compatible call signatures.\";\n    case 2351: return \"Cannot use 'new' with an expression whose type lacks a construct signature.\";\n    case 2355: return \"A function whose declared type is not 'void' must return a value.\";\n    case 2357: return \"The operand of an increment or decrement operator must be a variable or a property access.\";\n    case 2364: return \"The left-hand side of an assignment expression must be a variable or a property access.\";\n    case 2365: return \"Operator '{0}' cannot be applied to types '{1}' and '{2}'.\";\n    case 2380: return \"'get' and 'set' accessor must have the same type.\";\n    case 2390: return \"Constructor implementation is missing.\";\n    case 2391: return \"Function implementation is missing or not immediately following the declaration.\";\n    case 2392: return \"Multiple constructor implementations are not allowed.\";\n    case 2393: return \"Duplicate function implementation.\";\n    case 2395: return \"Individual declarations in merged declaration '{0}' must be all exported or all local.\";\n    case 2469: return \"The '{0}' operator cannot be applied to type '{1}'.\";\n    case 2484: return \"Export declaration conflicts with exported declaration of '{0}'.\";\n    case 2540: return \"Cannot assign to '{0}' because it is a constant or a read-only property.\";\n    case 2541: return \"The target of an assignment must be a variable or a property access.\";\n    case 2542: return \"Index signature in type '{0}' only permits reading.\";\n    case 2554: return \"Expected {0} arguments, but got {1}.\";\n    case 2555: return \"Expected at least {0} arguments, but got {1}.\";\n    case 2558: return \"Expected {0} type arguments, but got {1}.\";\n    case 2651: return \"A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums.\";\n    case 2694: return \"Namespace '{0}' has no exported member '{1}'.\";\n    case 6054: return \"File '{0}' not found.\";\n    default: return \"\";\n  }\n}\n","/**\r\n * A TypeScript parser for the AssemblyScript subset.\r\n * @module parser\r\n *//***/\r\n\r\nimport {\r\n  Program,\r\n  CommonFlags,\r\n  LIBRARY_PREFIX,\r\n  PATH_DELIMITER\r\n} from \"./program\";\r\n\r\nimport {\r\n  Tokenizer,\r\n  Token,\r\n  Range,\r\n  CommentHandler\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\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  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  FunctionExpression,\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} from \"./ast\";\r\n\r\nconst builtinsFile = LIBRARY_PREFIX + \"builtins.ts\";\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  /** Log of source file names to be requested. */\r\n  backlog: string[] = new Array();\r\n  /** Log of source file names already processed. */\r\n  seenlog: 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 program = this.program;\r\n\r\n    // check if already parsed\r\n    var normalizedPath = normalizePath(path);\r\n    var sources = program.sources;\r\n    for (let i = 0, k = sources.length; i < k; ++i) {\r\n      if (sources[i].normalizedPath == normalizedPath) return;\r\n    }\r\n    this.seenlog.add(normalizedPath);\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    sources.push(source);\r\n\r\n    // mark the special builtins library file\r\n    if (source.normalizedPath == builtinsFile) {\r\n      source.set(CommonFlags.BUILTIN);\r\n    }\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) break;\r\n      let name = decorator.name;\r\n      if (name.kind == NodeKind.IDENTIFIER) {\r\n        let text = (<IdentifierExpression>name).text;\r\n        if (text == \"global\") {\r\n          flags |= CommonFlags.GLOBAL;\r\n          continue;\r\n        }\r\n        if (text == \"unmananged\") {\r\n          flags |= CommonFlags.UNMANAGED;\r\n          continue;\r\n        }\r\n      }\r\n      if (!decorators) decorators = [];\r\n      decorators.push(decorator);\r\n    }\r\n\r\n    // mark builtins\r\n    flags |= (tn.source.flags & CommonFlags.BUILTIN);\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 (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        tn.next();\r\n        flags |= CommonFlags.ABSTRACT;\r\n        if (!tn.skip(Token.CLASS)) {\r\n          this.error(\r\n            DiagnosticCode._0_expected,\r\n            tn.range(tn.pos), \"class\"\r\n          );\r\n          break;\r\n        }\r\n        // fall through\r\n      }\r\n      case Token.CLASS: {\r\n        tn.next();\r\n        statement = this.parseClass(tn, flags, decorators, startPos);\r\n        decorators = null;\r\n        break;\r\n      }\r\n      case Token.NAMESPACE: {\r\n        tn.next();\r\n        statement = this.parseNamespace(tn, flags, decorators, startPos);\r\n        decorators = null;\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: {\r\n        tn.next();\r\n        statement = this.parseTypeDeclaration(tn, flags, decorators, startPos);\r\n        decorators = null;\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    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    // 'void'\r\n    if (token == Token.VOID) {\r\n      return Node.createType(\r\n        Node.createIdentifierExpression(\"void\", tn.range()), [], false, tn.range(startPos, tn.pos)\r\n      );\r\n    }\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    // '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.skip(Token.IDENTIFIER)) {\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        this.error(\r\n          DiagnosticCode._0_expected,\r\n          tn.range(), \")\"\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.skip(Token.IDENTIFIER)) {\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.skip(Token.IDENTIFIER)) {\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.skip(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    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    if (!tn.skip(Token.CLOSEBRACE)) {\r\n      do {\r\n        let member = this.parseEnumValue(tn, CommonFlags.NONE);\r\n        if (!member) return null;\r\n        members.push(<EnumValueDeclaration>member);\r\n      } while (tn.skip(Token.COMMA));\r\n      if (!tn.skip(Token.CLOSEBRACE)) {\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 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.skip(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    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    if (!tn.skip(Token.GREATERTHAN)) {\r\n      do {\r\n        let typeParameter = this.parseTypeParameter(tn);\r\n        if (!typeParameter) return null;\r\n        typeParameters.push(<TypeParameterNode>typeParameter);\r\n      } while (tn.skip(Token.COMMA));\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    } else {\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  parseParameters(\r\n    tn: Tokenizer\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\r\n    if (tn.peek() != Token.CLOSEPAREN) {\r\n      do {\r\n        let param = this.parseParameter(tn);\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      } while (tn.skip(Token.COMMA));\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    return parameters;\r\n  }\r\n\r\n  parseParameter(\r\n    tn: Tokenizer,\r\n    suppressErrors: bool = false\r\n  ): ParameterNode | null {\r\n\r\n    // before: '...'? Identifier '?'? (':' Type)? ('=' Expression)?\r\n\r\n    var isRest = false;\r\n    var isOptional = false;\r\n    var startRange: Range | null = null;\r\n    if (tn.skip(Token.DOT_DOT_DOT)) {\r\n      isRest = true;\r\n      startRange = tn.range();\r\n    }\r\n    if (tn.skip(Token.IDENTIFIER)) {\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      return 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    } 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.skip(Token.IDENTIFIER)) {\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\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      null,\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.skip(Token.IDENTIFIER)) {\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,\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  parseClass(\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':\r\n    //   Identifier\r\n    //   ('<' TypeParameters)?\r\n    //   ('extends' Type)?\r\n    //   ('implements' Type (',' Type)*)?\r\n    //   '{' ClassMember* '}'\r\n\r\n    if (!tn.skip(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\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 = new Array<TypeNode>();\r\n    if (tn.skip(Token.IMPLEMENTS)) {\r\n      do {\r\n        let type = this.parseType(tn);\r\n        if (!type) return null;\r\n        implementsTypes.push(<TypeNode>type);\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    if (!tn.skip(Token.CLOSEBRACE)) {\r\n      do {\r\n        let member = this.parseClassMember(tn, flags);\r\n        if (!member) return null;\r\n        members.push(<DeclarationStatement>member);\r\n      } while (!tn.skip(Token.CLOSEBRACE));\r\n    }\r\n    return 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\r\n  parseClassMember(\r\n    tn: Tokenizer,\r\n    parentFlags: CommonFlags\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\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      decorators.push(<DecoratorNode>decorator);\r\n    }\r\n\r\n    var flags = parentFlags & CommonFlags.AMBIENT; // inherit\r\n\r\n    if (tn.skip(Token.PUBLIC)) {\r\n      flags |= CommonFlags.PUBLIC;\r\n    } else if (tn.skip(Token.PRIVATE)) {\r\n      flags |= CommonFlags.PRIVATE;\r\n    } else if (tn.skip(Token.PROTECTED)) {\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      flags |= CommonFlags.STATIC;\r\n      staticStart = tn.tokenPos;\r\n      staticEnd = tn.pos;\r\n    } else {\r\n      if (tn.skip(Token.ABSTRACT)) {\r\n        flags |= (CommonFlags.ABSTRACT | CommonFlags.INSTANCE);\r\n        abstractStart = tn.tokenPos;\r\n        abstractEnd = tn.pos;\r\n      } else {\r\n        flags |= CommonFlags.INSTANCE;\r\n      }\r\n      if (parentFlags & 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 (tn.skip(Token.GET)) {\r\n      if (tn.peek(true, true) == 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, true) == 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    if (!isConstructor && !tn.skip(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\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);\r\n      if (!parameters) return null;\r\n\r\n      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        null,\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        }\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()\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.skip(Token.IDENTIFIER)) {\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    if (tn.skip(Token.OPENBRACE)) {\r\n      let members = new Array<ExportMember>();\r\n      if (!tn.skip(Token.CLOSEBRACE)) {\r\n        do {\r\n          let member = this.parseExportMember(tn);\r\n          if (!member) return null;\r\n          members.push(member);\r\n        } while (tn.skip(Token.COMMA));\r\n        if (!tn.skip(Token.CLOSEBRACE)) {\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      let path: StringLiteralExpression | null = null;\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      if (ret.normalizedPath && !this.seenlog.has(<string>ret.normalizedPath)) {\r\n        this.backlog.push(<string>ret.normalizedPath);\r\n        this.seenlog.add(<string>ret.normalizedPath);\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  parseExportMember(\r\n    tn: Tokenizer\r\n  ): ExportMember | null {\r\n\r\n    // before: Identifier ('as' Identifier)?\r\n\r\n    if (tn.skip(Token.IDENTIFIER)) {\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.skip(Token.IDENTIFIER)) {\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      if (!tn.skip(Token.CLOSEBRACE)) {\r\n        do {\r\n          let member = this.parseImportDeclaration(tn);\r\n          if (!member) return null;\r\n          members.push(member);\r\n        } while (tn.skip(Token.COMMA));\r\n        if (!tn.skip(Token.CLOSEBRACE)) {\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    } else if (tn.skip(Token.ASTERISK)) {\r\n      if (tn.skip(Token.AS)) {\r\n        if (tn.skip(Token.IDENTIFIER)) {\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        if (!this.seenlog.has(ret.normalizedPath)) {\r\n          this.backlog.push(ret.normalizedPath);\r\n          this.seenlog.add(ret.normalizedPath);\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.skip(Token.IDENTIFIER)) {\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.skip(Token.IDENTIFIER)) {\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.skip(Token.IDENTIFIER)) {\r\n      let asIdentifier = Node.createIdentifierExpression(tn.readIdentifier(), tn.range());\r\n      if (tn.skip(Token.EQUALS)) {\r\n        if (tn.skip(Token.IDENTIFIER)) {\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.TYPE: {\r\n        statement = this.parseTypeDeclaration(tn, CommonFlags.NONE, null, tn.tokenPos);\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      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        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(true);\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(true);\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.skip(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        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.skip(Token.IDENTIFIER)) {\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(true);\r\n    var startPos = tn.tokenPos;\r\n    var expr: Expression | null = null;\r\n\r\n    if (token == Token.NULL) {\r\n      return Node.createNullExpression(tn.range());\r\n    }\r\n    if (token == Token.TRUE) {\r\n      return Node.createTrueExpression(tn.range());\r\n    }\r\n    if (token == Token.FALSE) {\r\n      return Node.createFalseExpression(tn.range());\r\n    }\r\n\r\n    var p = determinePrecedenceStart(token);\r\n    if (p != Precedence.INVALID) {\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, p);\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    switch (token) {\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(true)) {\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        if (!tn.skip(Token.CLOSEBRACKET)) {\r\n          do {\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.peek() == Token.CLOSEBRACKET) break;\r\n          } while (tn.skip(Token.COMMA));\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        }\r\n        return Node.createArrayLiteralExpression(elementExpressions, 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      default: {\r\n        this.error(\r\n          DiagnosticCode.Expression_expected,\r\n          tn.range()\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      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    if (!tn.skip(Token.CLOSEPAREN)) {\r\n      do {\r\n        let expr = this.parseExpression(tn, Precedence.COMMA + 1);\r\n        if (!expr) return null;\r\n        args.push(expr);\r\n      } while (tn.skip(Token.COMMA));\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    return args;\r\n  }\r\n\r\n  parseExpression(\r\n    tn: Tokenizer,\r\n    precedence: Precedence = 0\r\n  ): Expression | null {\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 with type arguments\r\n    var typeArguments: CommonTypeNode[] | null;\r\n    while (\r\n      // there might be better ways to distinguish a LESSTHAN from a CALL with type arguments\r\n      (typeArguments = this.tryParseTypeArgumentsBeforeArguments(tn)) ||\r\n      tn.skip(Token.OPENPAREN)\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));\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);\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        // ElementAccessExpression\r\n        case Token.OPENBRACKET: {\r\n          next = this.parseExpression(tn);\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);\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.CLOSEBRACE     // current step should handle this\r\n      ) {\r\n        break;\r\n      }\r\n      if (nextToken == Token.SEMICOLON) { // end of the statement for sure\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  //   var depth = 0;\r\n  //   var token: Token;\r\n  //   do {\r\n  //     token = tn.next();\r\n  //     if (token == Token.OPENBRACE) {\r\n  //       ++depth;\r\n  //     } else if (token == Token.CLOSEBRACE) {\r\n  //       if (depth) --depth;\r\n  //       if (!depth) break; // done\r\n  //     }\r\n  //   } while (token != Token.ENDOFFILE);\r\n  // }\r\n}\r\n\r\n/** Operator precedence from least to largest. */\r\nexport const enum Precedence {\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  INVALID = -1\r\n}\r\n\r\n/** Determines the precedence of a starting token. */\r\nfunction determinePrecedenceStart(kind: Token): i32 {\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    default: return Precedence.INVALID;\r\n  }\r\n}\r\n\r\n/** Determines the precende of a non-starting token. */\r\nfunction determinePrecedence(kind: Token): i32 {\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    default: return Precedence.INVALID;\r\n  }\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","/**\r\n * Definition builders for WebIDL and TypeScript.\r\n * @module definitions\r\n *//***/\r\n\r\nimport {\r\n  Program,\r\n  Element,\r\n  CommonFlags,\r\n  ElementKind,\r\n  Global,\r\n  Enum,\r\n  EnumValue,\r\n  Function,\r\n  Class,\r\n  Namespace,\r\n  FunctionPrototype,\r\n  ClassPrototype,\r\n  ConstantValueKind,\r\n  Interface\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\r\n  /** Constructs a new Element walker. */\r\n  constructor(program: Program) {\r\n    this.program = program;\r\n  }\r\n\r\n  walk(): void {\r\n    for (let element of this.program.moduleLevelExports.values()) {\r\n      this.visitElement(element);\r\n    }\r\n  }\r\n\r\n  visitElement(element: Element): void {\r\n    switch (element.kind) {\r\n      case ElementKind.GLOBAL: {\r\n        if (element.is(CommonFlags.COMPILED)) {\r\n          this.visitGlobal(<Global>element);\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.ENUM: {\r\n        if (element.is(CommonFlags.COMPILED)) {\r\n          this.visitEnum(<Enum>element);\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.FUNCTION_PROTOTYPE: {\r\n        for (let instance of (<FunctionPrototype>element).instances.values()) {\r\n          if (instance.is(CommonFlags.COMPILED)) {\r\n            this.visitFunction(<Function>instance);\r\n          }\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          if (instance.is(CommonFlags.COMPILED)) {\r\n            this.visitClass(<Class>instance);\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ElementKind.NAMESPACE: {\r\n        if ((<Namespace>element).is(CommonFlags.COMPILED)) {\r\n          this.visitNamespace(<Namespace>element);\r\n        }\r\n        break;\r\n      }\r\n      default: {\r\n        assert(false);\r\n        break;\r\n      }\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 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 seen: Set<Element> = new Set();\r\n  private indentLevel: i32 = 0;\r\n\r\n  /** Constructs a new WebIDL builder. */\r\n  constructor(program: Program) {\r\n    super(program);\r\n  }\r\n\r\n  visitGlobal(element: Global): void {\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\r\n    var sb = this.sb;\r\n    var isConst = element.is(CommonFlags.INLINED);\r\n    indent(sb, this.indentLevel);\r\n    if (isConst) {\r\n      sb.push(\"const \");\r\n    }\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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) {\r\n            sb.push(\"const \");\r\n          } else {\r\n            sb.push(\"readonly \");\r\n          }\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) {\r\n          this.visitElement(member);\r\n        }\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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()) {\r\n        this.visitElement(member);\r\n      }\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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  visitNamespace(element: Namespace): void {\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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()) {\r\n        this.visitElement(member);\r\n      }\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 seen: Set<Element> = new Set();\r\n  private indentLevel: i32 = 0;\r\n\r\n  /** Constructs a new WebIDL builder. */\r\n  constructor(program: Program) {\r\n    super(program);\r\n  }\r\n\r\n  visitGlobal(element: Global): void {\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\r\n    var sb = this.sb;\r\n    var isConst = element.is(CommonFlags.INLINED);\r\n    indent(sb, this.indentLevel);\r\n    if (isConst) {\r\n      sb.push(\"const \");\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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          this.seen.add(member);\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) {\r\n        this.visitNamespace(element);\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    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\r\n    var sb = this.sb;\r\n    var signature = element.signature;\r\n    indent(sb, this.indentLevel);\r\n    sb.push(\"function \");\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(signature.getParameterName(i));\r\n      sb.push(\": \");\r\n      sb.push(this.typeToString(parameters[i]));\r\n    }\r\n    sb.push(\"): \");\r\n    sb.push(this.typeToString(signature.returnType));\r\n    sb.push(\";\\n\");\r\n    this.visitNamespace(element);\r\n  }\r\n\r\n  visitClass(element: Class): void {\r\n    if (this.seen.has(element)) return;\r\n    this.seen.add(element);\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)) {\r\n        sb.push(\"abstract \");\r\n      }\r\n      sb.push(\"class \");\r\n    }\r\n    sb.push(element.simpleName);\r\n    var base = element.base;\r\n    if (base) {\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      // TODO\r\n    }\r\n    members = element.members; // instance\r\n    if (members) {\r\n      // TODO\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  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()) {\r\n        this.visitElement(member);\r\n      }\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    return this.sb.join(\"\");\r\n  }\r\n}\r\n\r\n// TODO: C bindings? or is this sufficiently covered by WebIDL and using a 3rd-party tool?\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  readString\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 = readString(_BinaryenFunctionGetName(func)) || \"$\" + this.functionId.toString(10);\r\n    var body = _BinaryenFunctionGetBody(func);\r\n    this.push(\"function \");\r\n    this.push(name);\r\n    this.push(\"(\");\r\n     for (let i: Index = 0, k: Index = _BinaryenFunctionGetNumParams(func); i < k; ++i) {\r\n      if (i > 0) this.push(\", \");\r\n      this.push(\"$\");\r\n      this.push(i.toString(10));\r\n      this.push(\": \");\r\n      this.push(nativeTypeToType(_BinaryenFunctionGetParam(func, i)));\r\n    }\r\n    this.push(\"): \");\r\n    this.push(nativeTypeToType(_BinaryenFunctionGetResult(func)));\r\n    this.push(\" \");\r\n    if (_BinaryenExpressionGetId(body) != ExpressionId.Block) {\r\n      this.push(\"{\\n\");\r\n    }\r\n    this.decompileExpression(body);\r\n    if (_BinaryenExpressionGetId(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 = _BinaryenExpressionGetId(expr);\r\n    var type = _BinaryenExpressionGetType(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 = readString(_BinaryenBlockGetName(expr))) != null) {\r\n          this.push(string);\r\n          this.push(\": \");\r\n        }\r\n        this.push(\"{\\n\");\r\n        k = _BinaryenBlockGetNumChildren(expr);\r\n        for (i = 0; i < k; ++i) {\r\n          this.decompileExpression(_BinaryenBlockGetChild(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(_BinaryenIfGetCondition(expr));\r\n          this.push(\") \");\r\n          this.decompileExpression(_BinaryenIfGetIfTrue(expr));\r\n          if (nested = _BinaryenIfGetIfFalse(expr)) {\r\n            this.push(\" else \");\r\n            this.decompileExpression(nested);\r\n          }\r\n        } else {\r\n          this.decompileExpression(_BinaryenIfGetCondition(expr));\r\n          this.push(\" ? \");\r\n          this.decompileExpression(_BinaryenIfGetIfTrue(expr));\r\n          this.push(\" : \");\r\n          this.decompileExpression(_BinaryenIfGetIfFalse(expr));\r\n        }\r\n        return;\r\n      }\r\n      case ExpressionId.Loop: {\r\n        if ((string = readString(_BinaryenLoopGetName(expr))) != null) {\r\n          this.push(string);\r\n          this.push(\": \");\r\n        }\r\n        this.push(\"do \");\r\n        this.decompileExpression(_BinaryenLoopGetBody(expr));\r\n        this.push(\"while (0);\\n\");\r\n      }\r\n      case ExpressionId.Break: {\r\n        if (nested = _BinaryenBreakGetCondition(expr)) {\r\n          this.push(\"if (\");\r\n          this.decompileExpression(nested);\r\n          this.push(\") \");\r\n        }\r\n        if ((string = readString(_BinaryenBreakGetName(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(\"$\");\r\n        this.push(_BinaryenGetLocalGetIndex(expr).toString(10));\r\n        return;\r\n      }\r\n      case ExpressionId.SetLocal: {\r\n        this.push(\"$\");\r\n        this.push(_BinaryenSetLocalGetIndex(expr).toString(10));\r\n        this.push(\" = \");\r\n        this.decompileExpression(_BinaryenSetLocalGetValue(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(_BinaryenLoadGetOffset(expr).toString(10));\r\n        this.push(\" + \");\r\n        this.decompileExpression(_BinaryenLoadGetPtr(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(_BinaryenStoreGetOffset(expr).toString(10));\r\n        this.push(\" + \");\r\n        this.decompileExpression(_BinaryenStoreGetPtr(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(_BinaryenStoreGetValue(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(_BinaryenConstGetValueI32(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                  _BinaryenConstGetValueI64Low(expr),\r\n                  _BinaryenConstGetValueI64High(expr)\r\n                )\r\n              )\r\n            );\r\n            return;\r\n          }\r\n          case NativeType.F32: {\r\n            this.push(_BinaryenConstGetValueF32(expr).toString(10));\r\n            return;\r\n          }\r\n          case NativeType.F64: {\r\n            this.push(_BinaryenConstGetValueF64(expr).toString(10));\r\n            return;\r\n          }\r\n        }\r\n        break;\r\n      }\r\n      case ExpressionId.Unary: {\r\n        switch (_BinaryenUnaryGetOp(expr)) {\r\n          case UnaryOp.ClzI32: {\r\n            this.push(\"clz<i32>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.AbsF32: {\r\n            this.push(\"abs<f32>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ClzI64: {\r\n            this.push(\"clz<i64>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ExtendI32: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ExtendU32: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.WrapI64: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToI32: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToI64: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToU32: {\r\n            this.push(\"<i32><u32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF32ToU64: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToI32: {\r\n            this.push(\"<i32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToI64: {\r\n            this.push(\"<i64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToU32: {\r\n            this.push(\"<i32><u32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.TruncF64ToU64: {\r\n            this.push(\"<i64><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretF32: {\r\n            this.push(\"reinterpret<f32,i32>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI32ToF32: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI32ToF64: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU32ToF32: {\r\n            this.push(\"<f32><u32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU32ToF64: {\r\n            this.push(\"<f64><u32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI64ToF32: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertI64ToF64: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU64ToF32: {\r\n            this.push(\"<f32><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ConvertU64ToF64: {\r\n            this.push(\"<f64><u64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.PromoteF32: {\r\n            this.push(\"<f64>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.DemoteF64: {\r\n            this.push(\"<f32>\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(expr));\r\n            return;\r\n          }\r\n          case UnaryOp.ReinterpretI32: {\r\n            this.push(\"reinterpret<i32,f32>(\");\r\n            this.decompileExpression(_BinaryenUnaryGetValue(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(_BinaryenUnaryGetValue(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 (_BinaryenBinaryGetOp(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" + \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" - \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" * \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" / \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivU32: {\r\n            this.push(\"<i32>(<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" / <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.RemI32:\r\n          case BinaryOp.RemI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" % \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RemU32: {\r\n            this.push(\"<i32>(<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" / <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.AndI32:\r\n          case BinaryOp.AndI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" & \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.OrI32:\r\n          case BinaryOp.OrI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" | \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.XorI32:\r\n          case BinaryOp.XorI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" ^ \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShlI32:\r\n          case BinaryOp.ShlI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" << \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShrU32:\r\n          case BinaryOp.ShrU64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >>> \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.ShrI32:\r\n          case BinaryOp.ShrI64: {\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >> \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RotlI32: {\r\n            this.push(\"rotl<i32>(\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" == \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" != \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" < \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LtU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" < <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" <= \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" <= <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" > \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" > <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >= \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeU32: {\r\n            this.push(\"<u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >= <u32>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.DivU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" / <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RemU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" % <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.RotlI64: {\r\n            this.push(\"rotl<i64>(\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            this.push(\")\");\r\n            return;\r\n          }\r\n          case BinaryOp.LtU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" < <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.LeU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" <= <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GtU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" > <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.GeU64: {\r\n            this.push(\"<u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\" >= <u64>\");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(expr));\r\n            return;\r\n          }\r\n          case BinaryOp.CopysignF32: {\r\n            this.push(\"copysign<f32>(\");\r\n            this.decompileExpression(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenBinaryGetLeft(expr));\r\n            this.push(\", \");\r\n            this.decompileExpression(_BinaryenBinaryGetRight(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(_BinaryenSelectGetIfTrue(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(_BinaryenSelectGetIfFalse(expr));\r\n        this.push(\", \");\r\n        this.decompileExpression(_BinaryenSelectGetCondition(expr));\r\n        this.push(\")\");\r\n        return;\r\n      }\r\n      case ExpressionId.Drop: {\r\n        this.decompileExpression(_BinaryenDropGetValue(expr));\r\n        this.push(\";\\n\");\r\n        return;\r\n      }\r\n      case ExpressionId.Return: {\r\n        if (nested = _BinaryenReturnGetValue(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 (_BinaryenHostGetOp(expr)) {\r\n          case HostOp.CurrentMemory: {\r\n            this.push(\"current_memory()\");\r\n            return;\r\n          }\r\n          case HostOp.GrowMemory: {\r\n            this.push(\"grow_memory(\");\r\n            this.decompileExpression(_BinaryenHostGetOperand(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 * 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} 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  LIBRARY_PREFIX\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) {\r\n    parser = new Parser();\r\n    isEntry = true;\r\n  }\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 `noMemory` option. */\r\nexport function setNoMemory(options: Options, noMemory: bool): void {\r\n  options.noMemory = noMemory;\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 `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/** 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 };\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","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","const Long = global.Long || require(\"long\");\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_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 util *//***/\r\n\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\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\nexport function writeF32(value: f32, buffer: Uint8Array, offset: i32): void {\r\n  writeI32(f32_as_i32(value), buffer, offset);\r\n}\r\n\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","/** @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\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\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","/**\r\n * Built-in elements providing WebAssembly core functionality.\r\n * @module builtins\r\n *//***/\r\n\r\nimport {\r\n  Compiler,\r\n  ConversionKind,\r\n\r\n  makeSmallIntegerWrap\r\n} from \"./compiler\";\r\n\r\nimport {\r\n  DiagnosticCode\r\n} from \"./diagnostics\";\r\n\r\nimport {\r\n  Node,\r\n  Expression\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} from \"./module\";\r\n\r\nimport {\r\n  ElementKind,\r\n  Global,\r\n  Local,\r\n  FunctionPrototype,\r\n  Class,\r\n  ClassPrototype\r\n} from \"./program\";\r\n\r\n/** Compiles a get of a built-in global. */\r\nexport function compileGetConstant(\r\n  compiler: Compiler,\r\n  global: Global,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  switch (global.internalName) {\r\n    case \"NaN\": { // context-sensitive\r\n      if (compiler.currentType == Type.f32) {\r\n        return compiler.module.createF32(NaN);\r\n      } else {\r\n        compiler.currentType = Type.f64;\r\n        return compiler.module.createF64(NaN);\r\n      }\r\n    }\r\n    case \"Infinity\": { // context-sensitive\r\n      if (compiler.currentType == Type.f32) {\r\n        return compiler.module.createF32(Infinity);\r\n      } else {\r\n        compiler.currentType = Type.f64;\r\n        return compiler.module.createF64(Infinity);\r\n      }\r\n    }\r\n    case \"HEAP_BASE\": { // never inlined for linking purposes\r\n      compiler.currentType = compiler.options.usizeType;\r\n      return compiler.module.createGetGlobal(\"HEAP_BASE\", compiler.currentType.toNativeType());\r\n    }\r\n  }\r\n  compiler.error(\r\n    DiagnosticCode.Operation_not_supported,\r\n    reportNode.range\r\n  );\r\n  return compiler.module.createUnreachable();\r\n}\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  var tempLocal0: Local,\r\n      tempLocal1: Local;\r\n\r\n  var type: Type,\r\n      offset: i32;\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\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\r\n      compiler.currentType = Type.bool;\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\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\r\n      compiler.currentType = Type.bool;\r\n      return type.is(TypeFlags.FLOAT)\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n    case \"isReference\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\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\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\r\n      compiler.currentType = Type.bool;\r\n      let classType = type.classType;\r\n      if (classType) {\r\n        let stringPrototype = compiler.program.elementsLookup.get(\"String\");\r\n        if (stringPrototype) {\r\n          assert(stringPrototype.kind == ElementKind.CLASS_PROTOTYPE);\r\n          let stringInstance = (<ClassPrototype>stringPrototype).resolve(null);\r\n          if (!stringInstance) return module.createUnreachable();\r\n          if (classType.isAssignableTo(stringInstance)) {\r\n            return module.createI32(1);\r\n          }\r\n        }\r\n      }\r\n      return module.createI32(0);\r\n    }\r\n    case \"isArray\": {\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        ); // recoverable\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      compiler.compileExpressionRetainType(operands[0], Type.i32, false);\r\n      type = compiler.currentType;\r\n      compiler.currentType = Type.bool;\r\n      let classType = type.classType;\r\n      return classType != null && classType.prototype.fnIndexedGet != null\r\n        ? module.createI32(1)\r\n        : module.createI32(0);\r\n    }\r\n\r\n    // math\r\n\r\n    case \"isNaN\": { // isNaN<T?>(value: T) -> bool\r\n      compiler.currentType = Type.bool;\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.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 module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.F32: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f32);\r\n          ret = module.createBinary(BinaryOp.NeF32,\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createGetLocal(tempLocal0.index, NativeType.F32)\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f64);\r\n          ret = module.createBinary(BinaryOp.NeF64,\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createGetLocal(tempLocal0.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 = module.createUnreachable();\r\n          break;\r\n        }\r\n        default: { // every other type is never NaN\r\n          ret = module.createI32(0);\r\n          break;\r\n        }\r\n      }\r\n      compiler.currentType = Type.bool;\r\n      return ret;\r\n    }\r\n    case \"isFinite\": { // isFinite<T?>(value: T) -> bool\r\n      compiler.currentType = Type.bool;\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.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 module.createUnreachable();\r\n      }\r\n      if (typeArguments) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.F32: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f32);\r\n          ret = module.createSelect(\r\n            module.createBinary(BinaryOp.NeF32,\r\n              module.createUnary(UnaryOp.AbsF32,\r\n                module.createTeeLocal(tempLocal0.index, arg0)\r\n              ),\r\n              module.createF32(Infinity)\r\n            ),\r\n            module.createI32(0),\r\n            module.createBinary(BinaryOp.EqF32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.F32),\r\n              module.createGetLocal(tempLocal0.index, NativeType.F32)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.F64: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f64);\r\n          ret = module.createSelect(\r\n            module.createBinary(BinaryOp.NeF64,\r\n              module.createUnary(UnaryOp.AbsF64,\r\n                module.createTeeLocal(tempLocal0.index, arg0)\r\n              ),\r\n              module.createF64(Infinity)\r\n            ),\r\n            module.createI32(0),\r\n            module.createBinary(BinaryOp.EqF64,\r\n              module.createGetLocal(tempLocal0.index, NativeType.F64),\r\n              module.createGetLocal(tempLocal0.index, NativeType.F64)\r\n            )\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 = module.createUnreachable();\r\n          break;\r\n        }\r\n        default: { // every other type is always finite\r\n          ret = module.createI32(1);\r\n          break;\r\n        }\r\n      }\r\n      compiler.currentType = Type.bool;\r\n      return ret;\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        default: { // any integer up to 32-bits incl. bool\r\n          ret = module.createUnary(UnaryOp.ClzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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        case TypeKind.F32:\r\n        case TypeKind.F64:\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 \"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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        default: { // any integer up to 32-bits incl. bool\r\n          ret = module.createUnary(UnaryOp.CtzI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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        case TypeKind.F32:\r\n        case TypeKind.F64:\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 \"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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        default: { // any integer up to 32-bits incl. bool\r\n          ret = module.createUnary(UnaryOp.PopcntI32, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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        case TypeKind.F32:\r\n        case TypeKind.F64:\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 \"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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\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 = makeSmallIntegerWrap(\r\n            module.createBinary(BinaryOp.RotlI32, arg0, arg1),\r\n            compiler.currentType,\r\n            module\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.isReference) {\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;\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\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 = makeSmallIntegerWrap(\r\n            module.createBinary(BinaryOp.RotrI32, arg0, arg1),\r\n            compiler.currentType,\r\n            module\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.isReference) {\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;\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n          // doesn't need sign-extension here because ifFalse below is either positive\r\n          // or MIN_VALUE (-MIN_VALUE == MIN_VALUE) if selected\r\n        case TypeKind.I32: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createBinary(BinaryOp.SubI32, // ifFalse\r\n              module.createI32(0),\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32)\r\n            ),\r\n            module.createBinary(BinaryOp.GtI32,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32),\r\n              module.createI32(0)\r\n            )\r\n          );\r\n          break;\r\n        }\r\n        case TypeKind.ISIZE: {\r\n          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.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(tempLocal0.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(tempLocal0.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          tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\r\n          ret = module.createSelect(\r\n            module.createTeeLocal(tempLocal0.index, arg0),\r\n            module.createBinary(BinaryOp.SubI64,\r\n              module.createI64(0, 0),\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64),\r\n            ),\r\n            module.createBinary(BinaryOp.GtI64,\r\n              module.createGetLocal(tempLocal0.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.isReference) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i32);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i32);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\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          tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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.isReference) {\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          tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.I8:\r\n        case TypeKind.I16:\r\n        case TypeKind.I32: {\r\n          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i32);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i32);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\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          tempLocal0 = compiler.currentFunction.getTempLocal(Type.i64);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\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          tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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.isReference) {\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          tempLocal0 = compiler.currentFunction.getTempLocal(compiler.options.usizeType);\r\n          tempLocal1 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], compiler.currentType);\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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);\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);\r\n          ret = module.createUnary(UnaryOp.ReinterpretF64, arg0);\r\n          break;\r\n        }\r\n        case TypeKind.USIZE: {\r\n          if (typeArguments[0].isReference) {\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            );\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.u32);\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.u64);\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.f64, ConversionKind.NONE);\r\n      }\r\n      switch (compiler.currentType.kind) {\r\n        case TypeKind.USIZE: {\r\n          if (compiler.currentType.isReference) {\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(operands[0], compiler.options.usizeType);\r\n      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(operands[0], compiler.options.usizeType);\r\n      arg1 = compiler.compileExpression(\r\n        operands[1],\r\n        typeArguments[0],\r\n        typeArguments[0].is(TypeFlags.INTEGER)\r\n          ? ConversionKind.NONE // wraps a larger integer type to a smaller one, i.e. i32.store8\r\n          : ConversionKind.IMPLICIT\r\n      );\r\n      if (\r\n        compiler.currentType.is(TypeFlags.INTEGER) &&\r\n        typeArguments[0].is(TypeFlags.INTEGER) &&\r\n        typeArguments[0].size > compiler.currentType.size\r\n      ) {\r\n        arg1 = compiler.convertExpression(\r\n          arg1,\r\n          compiler.currentType, typeArguments[0],\r\n          ConversionKind.IMPLICIT,\r\n          operands[1]\r\n        );\r\n        type = typeArguments[0];\r\n      } else {\r\n        type = compiler.currentType;\r\n      }\r\n      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) {\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        ret = compiler.options.isWasm64\r\n          ? module.createI64(typeArguments[0].byteSize, 0)\r\n          : module.createI32(typeArguments[0].byteSize);\r\n      } else {\r\n        compiler.error(\r\n          DiagnosticCode.Expected_0_type_arguments_but_got_1,\r\n          reportNode.range, \"1\", \"0\"\r\n        );\r\n        return module.createUnreachable();\r\n      }\r\n      return ret;\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpression(operands[0], Type.i32, ConversionKind.NONE);\r\n      }\r\n      arg1 = compiler.compileExpression(operands[1], type = compiler.currentType);\r\n      arg2 = compiler.compileExpression(operands[2], Type.bool);\r\n      compiler.currentType = type;\r\n      switch (compiler.currentType.kind) {\r\n        default: { // any 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 \"current_memory\": { // current_memory() -> 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 \"grow_memory\": { // grow_memory(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);\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 \"move_memory\": { // move_memory(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(operands[0], compiler.options.usizeType);\r\n      arg1 = compiler.compileExpression(operands[1], compiler.options.usizeType);\r\n      arg2 = compiler.compileExpression(operands[2], compiler.options.usizeType);\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 \"set_memory\": { // set_memory(dest: usize, value: u32, 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(operands[0], compiler.options.usizeType);\r\n      arg1 = compiler.compileExpression(operands[1], Type.u32);\r\n      arg2 = compiler.compileExpression(operands[2], compiler.options.usizeType);\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      } else if (typeArguments[0].kind != TypeKind.USIZE) { // any usize\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      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.compileExpression(\r\n        operands[0],\r\n        compiler.options.usizeType,\r\n        ConversionKind.NONE\r\n      );\r\n      compiler.currentType = typeArguments[0];\r\n      if (compiler.currentType.kind != TypeKind.USIZE) {\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]);\r\n      } else {\r\n        arg0 = compiler.compileExpressionRetainType(operands[0], Type.i32);\r\n      }\r\n\r\n      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          default: { // any integer up to 32-bits incl. bool\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.i32);\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI32,\r\n                module.createTeeLocal(tempLocal0.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I32)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.I64:\r\n          case TypeKind.U64: {\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.i64);\r\n            ret = module.createIf(\r\n              module.createUnary(UnaryOp.EqzI64,\r\n                module.createTeeLocal(tempLocal0.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.index, NativeType.I64)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.ISIZE:\r\n          case TypeKind.USIZE: {\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(compiler.options.usizeType);\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(tempLocal0.index, arg0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.index, compiler.options.nativeSizeType)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F32: {\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f32);\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF32,\r\n                module.createTeeLocal(tempLocal0.index, arg0),\r\n                module.createF32(0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.index, NativeType.F32)\r\n            );\r\n            break;\r\n          }\r\n          case TypeKind.F64: {\r\n            tempLocal0 = compiler.currentFunction.getAndFreeTempLocal(Type.f64);\r\n            ret = module.createIf(\r\n              module.createBinary(BinaryOp.EqF64,\r\n                module.createTeeLocal(tempLocal0.index, arg0),\r\n                module.createF64(0)\r\n              ),\r\n              abort,\r\n              module.createGetLocal(tempLocal0.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\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(operands[0], Type.i8, ConversionKind.EXPLICIT);\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(operands[0], Type.i16, ConversionKind.EXPLICIT);\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(operands[0], Type.i32, ConversionKind.EXPLICIT);\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(operands[0], Type.i64, ConversionKind.EXPLICIT);\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      );\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(operands[0], Type.u8, ConversionKind.EXPLICIT);\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(operands[0], Type.u16, ConversionKind.EXPLICIT);\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(operands[0], Type.u32, ConversionKind.EXPLICIT);\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(operands[0], Type.u64, ConversionKind.EXPLICIT);\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      );\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(operands[0], Type.bool, ConversionKind.EXPLICIT);\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(operands[0], Type.f32, ConversionKind.EXPLICIT);\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(operands[0], Type.f64, ConversionKind.EXPLICIT);\r\n    }\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\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);\r\n    if (\r\n      _BinaryenExpressionGetId(expr) != ExpressionId.Const ||\r\n      _BinaryenExpressionGetType(expr) != NativeType.I64 ||\r\n      _BinaryenConstGetValueI64High(expr) != 0 ||\r\n      (value = _BinaryenConstGetValueI64Low(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);\r\n    if (\r\n      _BinaryenExpressionGetId(expr) != ExpressionId.Const ||\r\n      _BinaryenExpressionGetType(expr) != NativeType.I32 ||\r\n      (value = _BinaryenConstGetValueI32(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\nconst allocateInternalName = \"allocate_memory\";\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  cls: Class,\r\n  reportNode: Node\r\n): ExpressionRef {\r\n  var program = compiler.program;\r\n  assert(cls.program == program);\r\n  var module = compiler.module;\r\n  var options = compiler.options;\r\n\r\n  var prototype = program.elementsLookup.get(allocateInternalName);\r\n  if (!prototype) {\r\n    program.error(\r\n      DiagnosticCode.Cannot_find_name_0,\r\n      reportNode.range, allocateInternalName\r\n    );\r\n    return module.createUnreachable();\r\n  }\r\n  if (prototype.kind != ElementKind.FUNCTION_PROTOTYPE) {\r\n    program.error(\r\n      DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,\r\n      reportNode.range, prototype.internalName\r\n    );\r\n    return module.createUnreachable();\r\n  }\r\n\r\n  var instance = (<FunctionPrototype>prototype).resolve(); // reports\r\n  if (!(instance && compiler.compileFunction(instance))) return module.createUnreachable();\r\n\r\n  compiler.currentType = cls.type;\r\n  return module.createCall(\r\n    instance.internalName, [\r\n      options.isWasm64\r\n        ? module.createI64(cls.currentMemoryOffset)\r\n        : module.createI32(cls.currentMemoryOffset)\r\n    ],\r\n    options.nativeSizeType\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\"); // might be intended\r\n  if (!stringType) return module.createUnreachable();\r\n\r\n  var abortPrototype = program.elementsLookup.get(\"abort\"); // might be intended\r\n  if (!abortPrototype || abortPrototype.kind != ElementKind.FUNCTION_PROTOTYPE) return module.createUnreachable();\r\n\r\n  var abortInstance = (<FunctionPrototype>abortPrototype).resolve(); // reports\r\n  if (!(abortInstance && compiler.compileFunction(abortInstance))) return module.createUnreachable();\r\n\r\n  var messageArg = message != null\r\n    ? compiler.compileExpression(message, stringType)\r\n    : stringType.toNativeZero(module);\r\n\r\n  var filenameArg = compiler.compileStaticString(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","module.exports = __WEBPACK_EXTERNAL_MODULE__22__;","// Copy Binaryen exports to global scope\r\n\r\nconst binaryen = global.Binaryen || require(\"binaryen\");\r\n\r\nfor (var key in binaryen)\r\n  if (key.startsWith(\"_Binaryen\") || key.startsWith(\"_Relooper\"))\r\n    global[key] = binaryen[key];\r\n\r\n// Utilize Binaryen's heap\r\n\r\nglobal.allocate_memory = function(size) {\r\n  if (!size) return 0; // should be safe in our case\r\n  return binaryen._malloc(size);\r\n};\r\n\r\nglobal.free_memory = function(ptr) {\r\n  if (ptr) binaryen._free(ptr);\r\n};\r\n\r\nglobal.move_memory = function(dest, src, n) {\r\n  return binaryen._memmove(dest, src, n);\r\n};\r\n\r\nglobal.store = function(ptr, val) {\r\n  binaryen.HEAPU8[ptr] = val;\r\n};\r\n\r\nglobal.load = function(ptr) {\r\n  return binaryen.HEAPU8[ptr];\r\n};\r\n\r\n// Implement module stubs\r\n\r\nconst Module = require(\"../../module\").Module;\r\n\r\nModule.prototype.toText = function toText() {\r\n  var previousPrint = binaryen.print;\r\n  var ret = \"\";\r\n  binaryen.print = function(x) { ret += x + \"\\n\" };\r\n  _BinaryenModulePrint(this.ref);\r\n  binaryen.print = previousPrint;\r\n  return ret;\r\n};\r\n\r\nModule.prototype.toAsmjs = function toAsmjs() {\r\n  var previousPrint = binaryen.print;\r\n  var ret = \"\";\r\n  binaryen.print = function(x) { ret += x + \"\\n\" };\r\n  _BinaryenModulePrintAsmjs(this.ref);\r\n  binaryen.print = previousPrint;\r\n  return ret;\r\n};\r\n","var globalScope = typeof window !== \"undefined\" && window || typeof global !== \"undefined\" && global || self;\r\n\r\nvar HEAP = new Uint8Array(0);\r\nvar HEAP_OFFSET = 0;\r\n\r\nglobalScope[\"allocate_memory\"] = function allocate_memory(size) {\r\n  if (!(size >>>= 0))\r\n    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)\r\n    HEAP_OFFSET = (HEAP_OFFSET | 7) + 1;\r\n  return ptr;\r\n};\r\n\r\nglobalScope[\"free_memory\"] = function free_memory(ptr) {\r\n  // TODO\r\n};\r\n\r\nglobalScope[\"move_memory\"] = function move_memory(dest, src, n) {\r\n  HEAP.copyWithin(dest, src, src + n);\r\n};\r\n\r\nglobalScope[\"store\"] = function store(ptr, val, off) {\r\n  if (typeof off === \"number\")\r\n    ptr += off;\r\n  HEAP[ptr] = val;\r\n};\r\n\r\nglobalScope[\"load\"] = function load(ptr) {\r\n  if (typeof off === \"number\")\r\n    ptr += off;\r\n  return HEAP[ptr];\r\n};\r\n","/** @module std/portable *//***/\r\n\r\nvar globalScope = typeof window !== \"undefined\" && window || typeof global !== \"undefined\" && global || self;\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[\"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\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[\"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\nrequire(\"./portable/memory\");\r\n","/**\r\n * JavaScript glue code.\r\n * @module glue/js\r\n * @preferred\r\n *//***/\r\n\r\nimport \"../../../std/portable\";\r\nimport \"./binaryen\";\r\nimport \"./i64\";\r\nimport \"./float\";\r\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/src/compiler.ts b/src/compiler.ts
index 498079fa..95e7b076 100644
--- a/src/compiler.ts
+++ b/src/compiler.ts
@@ -4236,6 +4236,7 @@ export class Compiler extends DiagnosticEmitter {
     trampolineSignature.requiredParameters = maxArguments + 1;
     trampoline = new Function(original.prototype, trampolineName, trampolineSignature, original.memberOf);
     trampoline.flags = original.flags;
+    trampoline.contextualTypeArguments = original.contextualTypeArguments;
     trampoline.set(CommonFlags.COMPILED);
     original.trampoline = trampoline;
 
diff --git a/tests/compiler/function-types.optimized.wat b/tests/compiler/function-types.optimized.wat
index cc2e3bda..a16c7b7f 100644
--- a/tests/compiler/function-types.optimized.wat
+++ b/tests/compiler/function-types.optimized.wat
@@ -5,6 +5,7 @@
  (type $III (func (param i64 i64) (result i64)))
  (type $FFF (func (param f64 f64) (result f64)))
  (type $iiii (func (param i32 i32 i32) (result i32)))
+ (type $iiiii (func (param i32 i32 i32 i32) (result i32)))
  (type $v (func))
  (import "env" "abort" (func $abort (param i32 i32 i32 i32)))
  (global $function-types/i32Adder (mut i32) (i32.const 0))
@@ -56,7 +57,27 @@
    (call $function-types/makeAdder<i32>)
   )
  )
- (func $start (; 9 ;) (type $v)
+ (func $function-types/makeAndAdd<i32>|trampoline (; 9 ;) (type $iiiii) (param $0 i32) (param $1 i32) (param $2 i32) (param $3 i32) (result i32)
+  (block $N=1
+   (block $N=0
+    (block $N=invalid
+     (br_table $N=0 $N=1 $N=invalid
+      (get_local $3)
+     )
+    )
+    (unreachable)
+   )
+   (set_local $2
+    (call $function-types/makeAdder<i32>)
+   )
+  )
+  (call $function-types/doAddWithFn<i32>
+   (get_local $0)
+   (get_local $1)
+   (get_local $2)
+  )
+ )
+ (func $start (; 10 ;) (type $v)
   (set_global $function-types/i32Adder
    (call $function-types/makeAdder<i32>)
   )
@@ -176,5 +197,25 @@
     (unreachable)
    )
   )
+  (if
+   (i32.ne
+    (call $function-types/makeAndAdd<i32>|trampoline
+     (i32.const 1)
+     (i32.const 2)
+     (i32.const 0)
+     (i32.const 0)
+    )
+    (i32.const 3)
+   )
+   (block
+    (call $abort
+     (i32.const 0)
+     (i32.const 4)
+     (i32.const 41)
+     (i32.const 0)
+    )
+    (unreachable)
+   )
+  )
  )
 )
diff --git a/tests/compiler/function-types.ts b/tests/compiler/function-types.ts
index f38cdb4b..ac17a90f 100644
--- a/tests/compiler/function-types.ts
+++ b/tests/compiler/function-types.ts
@@ -33,3 +33,9 @@ function addI32(a: i32, b: i32): i32 {
 }
 
 assert(doAddWithFn<i32>(4, 5, addI32) == 9);
+
+function makeAndAdd<T>(a: T, b: T, adder: Adder<T> = makeAdder<T>()): T {
+  return adder(a, b);
+}
+
+assert(makeAndAdd<i32>(1, 2) == 3);
diff --git a/tests/compiler/function-types.untouched.wat b/tests/compiler/function-types.untouched.wat
index 6e568745..d37118d4 100644
--- a/tests/compiler/function-types.untouched.wat
+++ b/tests/compiler/function-types.untouched.wat
@@ -5,6 +5,7 @@
  (type $III (func (param i64 i64) (result i64)))
  (type $FFF (func (param f64 f64) (result f64)))
  (type $iiii (func (param i32 i32 i32) (result i32)))
+ (type $iiiii (func (param i32 i32 i32 i32) (result i32)))
  (type $v (func))
  (import "env" "abort" (func $abort (param i32 i32 i32 i32)))
  (global $function-types/i32Adder (mut i32) (i32.const 0))
@@ -81,7 +82,36 @@
    )
   )
  )
- (func $start (; 10 ;) (type $v)
+ (func $function-types/makeAndAdd<i32> (; 10 ;) (type $iiii) (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
+  (return
+   (call_indirect (type $iii)
+    (get_local $0)
+    (get_local $1)
+    (get_local $2)
+   )
+  )
+ )
+ (func $function-types/makeAndAdd<i32>|trampoline (; 11 ;) (type $iiiii) (param $0 i32) (param $1 i32) (param $2 i32) (param $3 i32) (result i32)
+  (block $N=1
+   (block $N=0
+    (block $N=invalid
+     (br_table $N=0 $N=1 $N=invalid
+      (get_local $3)
+     )
+    )
+    (unreachable)
+   )
+   (set_local $2
+    (call $function-types/makeAdder<i32>)
+   )
+  )
+  (call $function-types/makeAndAdd<i32>
+   (get_local $0)
+   (get_local $1)
+   (get_local $2)
+  )
+ )
+ (func $start (; 12 ;) (type $v)
   (nop)
   (set_global $function-types/i32Adder
    (call $function-types/makeAdder<i32>)
@@ -214,5 +244,27 @@
     (unreachable)
    )
   )
+  (if
+   (i32.eqz
+    (i32.eq
+     (call $function-types/makeAndAdd<i32>|trampoline
+      (i32.const 1)
+      (i32.const 2)
+      (i32.const 0)
+      (i32.const 0)
+     )
+     (i32.const 3)
+    )
+   )
+   (block
+    (call $abort
+     (i32.const 0)
+     (i32.const 4)
+     (i32.const 41)
+     (i32.const 0)
+    )
+    (unreachable)
+   )
+  )
  )
 )