Fix asc bundle with webpack 4, see #36; Function expression progress

bin/README.md

@@ -19,8 +19,8 @@ The API accepts the same options as the CLI but also lets you override stdout an
 const asc = require("assemblyscript/bin/asc.js");
 asc.main([
   "myModule.ts",
-  "-b", "myModule.wasm",
+  "--binaryFile", "myModule.wasm",
-  "-O",
+  "--optimize",
   "--sourceMap",
   "--measure"
 ], {

bin/asc

@@ -1,4 +1,5 @@
 #!/usr/bin/env node
 const asc = module.exports = require("./asc.js");
-if (/\basc$/.test(process.argv[1]))
+if (/\basc$/.test(process.argv[1])) {
   process.exitCode = asc.main(process.argv.slice(2));
+}

bin/asc.js

@@ -1,4 +1,13 @@
-//////////////////////// Compiler frontend for node.js /////////////////////////
+/**
+ * @file Compiler frontend for node.js
+ *
+ * Uses the low-level API exported from src/index.ts so it works with the compiler compiled to
+ * JavaScript as well as the compiler compiled to WebAssembly (eventually). Runs the sources
+ * directly through ts-node if distribution files are not present (indicated by a `-dev` version).
+ *
+ * Can also be packaged as a bundle suitable for in-browser use with the standard library injected
+ * in the build step. See dist/asc.js for the bundle and webpack.config.js for building details.
+ */
 
 const fs = require("fs");
 const path = require("path");
@@ -6,24 +15,24 @@ const os = require("os");
 
 // Use distribution files if present, otherwise run the sources directly
 var assemblyscript, isDev;
-try {
+(() => {
-  assemblyscript = require("../dist/assemblyscript.js");
-  isDev = false;
-  try { require("source-map-support").install(); } catch (e) {} // optional
-} catch (e) {
   try {
-    require("ts-node").register({
+    assemblyscript = require("../dist/assemblyscript.js");
-      project: path.join(__dirname, "..", "src", "tsconfig.json")
-    });
-    require("../src/glue/js");
-    assemblyscript = require("../src");
-    isDev = true;
-  } catch (e) {
-    // last resort: same directory CommonJS
-    assemblyscript = require("./assemblyscript");
     isDev = false;
+    try { require("source-map-support").install(); } catch (e) {/* optional */}
+  } catch (e) {
+    try {
+      require("ts-node").register({ project: path.join(__dirname, "..", "src", "tsconfig.json") });
+      require("../src/glue/js");
+      assemblyscript = require("../src");
+      isDev = true;
+    } catch (e) {
+      // last resort: same directory CommonJS
+      assemblyscript = eval("require('./assemblyscript')");
+      isDev = false;
+    }
   }
-}
+})();
 
 /** Whether this is a webpack bundle or not. */
 exports.isBundle = typeof BUNDLE_VERSION === "string";
@@ -32,8 +41,7 @@ exports.isBundle = typeof BUNDLE_VERSION === "string";
 exports.isDev = isDev;
 
 /** AssemblyScript veresion. */
-exports.version = exports.isBundle ? BUNDLE_VERSION
+exports.version = exports.isBundle ? BUNDLE_VERSION : require("../package.json").version;
-                : require("../package.json").version;
 
 /** Available options. */
 exports.options = require("./asc.json");
@@ -61,8 +69,9 @@ exports.main = function main(argv, options, callback) {
   if (typeof options === "function") {
     callback = options;
     options = {};
-  } else if (!options)
+  } else if (!options) {
     options = {};
+  }
 
   const stdout = options.stdout || process.stdout;
   const stderr = options.stderr || process.stderr;
@@ -72,17 +81,12 @@ exports.main = function main(argv, options, callback) {
   const stats = options.stats || createStats();
 
   // All of the above must be specified in browser environments
-  if (!stdout)
+  if (!stdout) throw Error("'options.stdout' must be specified");
-    throw Error("'options.stdout' must be specified");
+  if (!stderr) throw Error("'options.stderr' must be specified");
-  if (!stderr)
-    throw Error("'options.stderr' must be specified");
   if (!fs.readFileSync) {
-    if (readFile === readFileNode)
+    if (readFile === readFileNode) throw Error("'options.readFile' must be specified");
-      throw Error("'options.readFile' must be specified");
+    if (writeFile === writeFileNode) throw Error("'options.writeFile' must be specified");
-    if (writeFile === writeFileNode)
+    if (listFiles === listFilesNode) throw Error("'options.listFiles' must be specified");
-      throw Error("'options.writeFile' must be specified");
-    if (listFiles === listFilesNode)
-      throw Error("'options.listFiles' must be specified");
   }
 
   const args = parseArguments(argv);
@@ -110,18 +114,22 @@ exports.main = function main(argv, options, callback) {
       var option = exports.options[name];
       var text = " ";
       text += "--" + name;
-      if (option.aliases && option.aliases[0].length === 1)
+      if (option.aliases && option.aliases[0].length === 1) {
         text += ", -" + option.aliases[0];
-      while (text.length < indent)
+      }
+      while (text.length < indent) {
         text += " ";
+      }
       if (Array.isArray(option.desc)) {
         opts.push(text + option.desc[0] + option.desc.slice(1).map(line => {
-          for (let i = 0; i < indent; ++i)
+          for (let i = 0; i < indent; ++i) {
             line = " " + line;
+          }
           return os.EOL + line;
         }).join(""));
-      } else
+      } else {
         opts.push(text + option.desc);
+      }
     });
 
     (args.help ? stdout : stderr).write([
@@ -146,8 +154,9 @@ exports.main = function main(argv, options, callback) {
 
   // Include custom library components (with or without stdlib)
   if (args.lib) {
-    if (typeof args.lib === "string")
+    if (typeof args.lib === "string") {
       args.lib = args.lib.split(",");
+    }
     Array.prototype.push.apply(libDirs, args.lib.map(trim));
   }
 
@@ -164,12 +173,14 @@ exports.main = function main(argv, options, callback) {
     let sourceText = readFile(path.join(baseDir, sourcePath) + ".ts");
     if (sourceText === null) {
       sourceText = readFile(path.join(baseDir, sourcePath, "index.ts"));
-      if (sourceText === null)
+      if (sourceText === null) {
         return callback(Error("Entry file '" + sourcePath + ".ts' not found."));
-      else
+      } else {
         sourcePath += "/index.ts";
-    } else
+      }
+    } else {
       sourcePath += ".ts";
+    }
 
     stats.parseCount++;
     stats.parseTime += measure(() => {
@@ -182,9 +193,9 @@ exports.main = function main(argv, options, callback) {
       // Load library file if explicitly requested
       if (sourcePath.startsWith(exports.libraryPrefix)) {
         for (let i = 0, k = libDirs.length; i < k; ++i) {
-          if (exports.libraryFiles.hasOwnProperty(sourcePath))
+          if (exports.libraryFiles.hasOwnProperty(sourcePath)) {
             sourceText = exports.libraryFiles[sourcePath];
-          else {
+          } else {
             sourceText = readFile(path.join(
               libDirs[i],
               sourcePath.substring(exports.libraryPrefix.length) + ".ts")
@@ -205,9 +216,9 @@ exports.main = function main(argv, options, callback) {
             for (let i = 0, k = libDirs.length; i < k; ++i) {
               const dir = libDirs[i];
               const key = exports.libraryPrefix + sourcePath;
-              if (exports.libraryFiles.hasOwnProperty(key))
+              if (exports.libraryFiles.hasOwnProperty(key)) {
                 sourceText = exports.libraryFiles[key];
-              else {
+              } else {
                 sourceText = readFile(path.join(dir, sourcePath + ".ts"));
                 if (sourceText !== null) {
                   sourcePath = exports.libraryPrefix + sourcePath + ".ts";
@@ -215,30 +226,33 @@ exports.main = function main(argv, options, callback) {
                 }
               }
             }
-            if (sourceText === null)
+            if (sourceText === null) {
               return callback(
                 Error("Import file '" + sourcePath + ".ts' not found.")
               );
-          } else
+            }
+          } else {
             sourcePath += "/index.ts";
-        } else
+          }
+        } else {
           sourcePath += ".ts";
+        }
       }
       stats.parseCount++;
       stats.parseTime += measure(() => {
         assemblyscript.parseFile(sourceText, sourcePath, false, parser);
       });
     }
-    if (checkDiagnostics(parser, stderr))
+    if (checkDiagnostics(parser, stderr)) {
       return callback(Error("Parse error"));
+    }
   }
 
   // Include (other) library components
   var hasBundledLibrary = false;
   if (!args.noLib)
     Object.keys(exports.libraryFiles).forEach(libPath => {
-      if (libPath.lastIndexOf("/") >= exports.libraryPrefix.length)
+      if (libPath.lastIndexOf("/") >= exports.libraryPrefix.length) return;
-        return;
       stats.parseCount++;
       stats.parseTime += measure(() => {
         parser = assemblyscript.parseFile(
@@ -257,8 +271,9 @@ exports.main = function main(argv, options, callback) {
     for (let j = 0, l = libFiles.length; j < l; ++j) {
       let libPath = libFiles[j];
       let libText = readFile(path.join(libDir, libPath));
-      if (libText === null)
+      if (libText === null) {
         return callback(Error("Library file '" + libPath + "' not found."));
+      }
       stats.parseCount++;
       stats.parseTime += measure(() => {
         parser = assemblyscript.parseFile(
@@ -283,13 +298,15 @@ exports.main = function main(argv, options, callback) {
 
   var module;
   stats.compileCount++;
-  try {
+  (() => {
-    stats.compileTime += measure(() => {
+    try {
-      module = assemblyscript.compile(parser, compilerOptions);
+      stats.compileTime += measure(() => {
-    });
+        module = assemblyscript.compile(parser, compilerOptions);
-  } catch (e) {
+      });
-    return callback(e);
+    } catch (e) {
-  }
+      return callback(e);
+    }
+  })();
   if (checkDiagnostics(parser, stderr)) {
     if (module) module.dispose();
     return callback(Error("Compile error"));
@@ -327,35 +344,40 @@ exports.main = function main(argv, options, callback) {
   var debugInfo = !args.noDebug;
 
   if (args.optimize !== false) {
-    if (typeof args.optimize === "number")
+    if (typeof args.optimize === "number") {
       optimizeLevel = args.optimize;
-    else if (args["0"])
+    } else if (args["0"]) {
       optimizeLevel = 0;
-    else if (args["1"])
+    } else if (args["1"]) {
       optimizeLevel = 1;
-    else if (args["2"])
+    } else if (args["2"]) {
       optimizeLevel = 2;
-    else if (args["3"])
+    } else if (args["3"]) {
       optimizeLevel = 3;
-    else if (args.optimize === true) {
+    } else if (args.optimize === true) {
       optimizeLevel = exports.defaultOptimizeLevel;
       shrinkLevel = exports.defaultShrinkLevel;
     } else
       optimizeLevel = 0;
   }
-  if (args["s"])
-    shrinkLevel = 1;
-  else if (args["z"])
-    shrinkLevel = 2;
 
-  if (typeof args.optimizeLevel === "number")
+  if (args["s"]) {
-    optimizeLevel = args.optimizeLevel;
-  if (typeof args.shrinkLevel === "number")
-    shrinkLevel = args.shrinkLevel;
-  else if (args.shrinkLevel === "s")
     shrinkLevel = 1;
-  else if (args.shrinkLevel === "z")
+  } else if (args["z"]) {
     shrinkLevel = 2;
+  }
+
+  if (typeof args.optimizeLevel === "number") {
+    optimizeLevel = args.optimizeLevel;
+  }
+
+  if (typeof args.shrinkLevel === "number") {
+    shrinkLevel = args.shrinkLevel;
+  } else if (args.shrinkLevel === "s") {
+    shrinkLevel = 1;
+  } else if (args.shrinkLevel === "z") {
+    shrinkLevel = 2;
+  }
 
   module.setOptimizeLevel(optimizeLevel > 0 ? optimizeLevel : 0);
   module.setShrinkLevel(shrinkLevel);
@@ -363,13 +385,15 @@ exports.main = function main(argv, options, callback) {
 
   var runPasses = [];
   if (args.runPasses) {
-    if (typeof args.runPasses === "string")
+    if (typeof args.runPasses === "string") {
       args.runPasses = args.runPasses.split(",");
-    if (args.runPasses.length)
+    }
+    if (args.runPasses.length) {
       args.runPasses.forEach(pass => {
         if (runPasses.indexOf(pass) < 0)
           runPasses.push(pass);
       });
+    }
   }
 
   // Optimize the module if requested
@@ -393,12 +417,13 @@ exports.main = function main(argv, options, callback) {
     let hasStdout = false;
 
     if (args.outFile != null) {
-      if (/\.was?t$/.test(args.outFile) && args.textFile == null)
+      if (/\.was?t$/.test(args.outFile) && args.textFile == null) {
         args.textFile = args.outFile;
-      else if (/\.js$/.test(args.outFile) && args.asmjsFile == null)
+      } else if (/\.js$/.test(args.outFile) && args.asmjsFile == null) {
         args.asmjsFile = args.outFile;
-      else if (args.binaryFile == null)
+      } else if (args.binaryFile == null) {
         args.binaryFile = args.outFile;
+      }
     }
 
     // Write binary
@@ -437,12 +462,13 @@ exports.main = function main(argv, options, callback) {
                 );
                 if (text !== null) break;
               }
-            } else
+            } else {
               text = readFile(path.join(baseDir, name));
-            if (text === null)
+            }
+            if (text === null) {
               return callback(Error("Source file '" + name + "' not found."));
-            if (!sourceMap.sourceContents)
+            }
-              sourceMap.sourceContents = [];
+            if (!sourceMap.sourceContents) sourceMap.sourceContents = [];
             sourceMap.sourceContents[index] = text;
           });
           writeFile(path.join(
@@ -501,8 +527,9 @@ exports.main = function main(argv, options, callback) {
   }
 
   module.dispose();
-  if (args.measure)
+  if (args.measure) {
     printStats(stats, stderr);
+  }
   return callback(null);
 
   function readFileNode(filename) {
@@ -522,10 +549,11 @@ exports.main = function main(argv, options, callback) {
     try {
       stats.writeCount++;
       stats.writeTime += measure(() => {
-        if (typeof contents === "string")
+        if (typeof contents === "string") {
           fs.writeFileSync(filename, contents, { encoding: "utf8" } );
-        else
+        } else {
           fs.writeFileSync(filename, contents);
+        }
       });
       return true;
     } catch (e) {
@@ -551,10 +579,11 @@ exports.main = function main(argv, options, callback) {
       writeStdout.used = true;
     }
     stats.writeTime += measure(() => {
-      if (typeof contents === "string")
+      if (typeof contents === "string") {
         stdout.write(contents, { encoding: "utf8" });
-      else
+      } else {
         stdout.write(contents);
+      }
     });
   }
 }
@@ -564,14 +593,17 @@ function parseArguments(argv) {
   const opts = {};
   Object.keys(exports.options).forEach(key => {
     const opt = exports.options[key];
-    if (opt.aliases)
+    if (opt.aliases) {
       (opts.alias || (opts.alias = {}))[key] = opt.aliases;
-    if (opt.default !== undefined)
+    }
+    if (opt.default !== undefined) {
       (opts.default || (opts.default = {}))[key] = opt.default;
-    if (opt.type === "string")
+    }
+    if (opt.type === "string") {
       (opts.string || (opts.string = [])).push(key);
-    else if (opt.type === "boolean")
+    } else if (opt.type === "boolean") {
       (opts.boolean || (opts.boolean = [])).push(key);
+    }
   });
   return require("minimist")(argv, opts);
 }
@@ -587,8 +619,7 @@ function checkDiagnostics(emitter, stderr) {
       assemblyscript.formatDiagnostic(diagnostic, stderr.isTTY, true) +
       os.EOL + os.EOL
     );
-    if (assemblyscript.isError(diagnostic))
+    if (assemblyscript.isError(diagnostic)) hasErrors = true;
-      hasErrors = true;
   }
   return hasErrors;
 }
@@ -617,8 +648,7 @@ function createStats() {
 
 exports.createStats = createStats;
 
-if (!process.hrtime)
+if (!process.hrtime) process.hrtime = require("browser-process-hrtime");
-  process.hrtime = require("browser-process-hrtime");
 
 /** Measures the execution time of the specified function.  */
 function measure(fn) {

package.json

@@ -38,7 +38,7 @@
     "node": ">=8"
   },
   "scripts": {
-    "build": "webpack",
+    "build": "webpack --mode production",
     "clean": "node scripts/clean",
     "lint": "npm run lint:compiler && npm run lint:library",
     "lint:compiler": "tslint -c tslint.json --project src --formatters-dir lib/tslint --format as",

src/compiler.ts

@@ -294,7 +294,7 @@ export class Compiler extends DiagnosticEmitter {
       var pages = i64_shr_u(i64_align(memoryOffset, 0x10000), i64_new(16, 0));
       this.module.setMemory(
         i64_low(pages),
-        Module.MAX_MEMORY_WASM32 /* TODO: not WASM64 compatible yet */,
+        Module.MAX_MEMORY_WASM32, // TODO: not WASM64 compatible yet
         this.memorySegments,
         this.options.target,
         "memory"
@@ -323,6 +323,7 @@ export class Compiler extends DiagnosticEmitter {
   compileSourceByPath(normalizedPathWithoutExtension: string, reportNode: Node): void {
     var sources = this.program.sources;
 
+    // try file.ts
     var source: Source;
     var expected = normalizedPathWithoutExtension + ".ts";
     for (var i = 0, k = sources.length; i < k; ++i) {
@@ -333,6 +334,7 @@ export class Compiler extends DiagnosticEmitter {
       }
     }
 
+    // try file/index.ts
     expected = normalizedPathWithoutExtension + "/index.ts";
     for (i = 0, k = sources.length; i < k; ++i) {
       source = sources[i];
@@ -342,6 +344,7 @@ export class Compiler extends DiagnosticEmitter {
       }
     }
 
+    // try (lib)/file.ts
     expected = LIBRARY_PREFIX + normalizedPathWithoutExtension + ".ts";
     for (i = 0, k = sources.length; i < k; ++i) {
       source = sources[i];
@@ -362,6 +365,7 @@ export class Compiler extends DiagnosticEmitter {
     if (files.has(source.normalizedPath)) return;
     files.add(source.normalizedPath);
 
+    // compile top-level statements
     var noTreeShaking = this.options.noTreeShaking;
     var isEntry = source.isEntry;
     var startFunctionBody = this.startFunctionBody;
@@ -451,35 +455,36 @@ export class Compiler extends DiagnosticEmitter {
   // globals
 
   compileGlobalDeclaration(declaration: VariableDeclaration): Global | null {
+    // look up the initialized program element
     var element = this.program.elements.get(declaration.fileLevelInternalName);
-    if (!element || element.kind != ElementKind.GLOBAL) {
+    if (!element || element.kind != ElementKind.GLOBAL) throw new Error("global expected");
-      throw new Error("global expected");
+    if (!this.compileGlobal(<Global>element)) return null; // reports
-    }
-    if (!this.compileGlobal(<Global>element)) { // reports
-      return null;
-    }
     return <Global>element;
   }
 
   compileGlobal(global: Global): bool {
-    if (global.is(ElementFlags.COMPILED) || global.is(ElementFlags.BUILTIN)) {
+    if (global.is(ElementFlags.COMPILED) || global.is(ElementFlags.BUILTIN)) return true;
-      return true;
+    global.set(ElementFlags.COMPILED);   // ^ built-ins are compiled on use
-    }
 
     var declaration = global.declaration;
     var initExpr: ExpressionRef = 0;
-    if (global.type == Type.void) { // infer type
+
+    if (global.type == Type.void) { // type is void if not yet resolved or not annotated
+
+      // resolve now if annotated
       if (declaration.type) {
         var resolvedType = this.program.resolveType(declaration.type); // reports
         if (!resolvedType) return false;
         if (resolvedType == Type.void) {
           this.error(
-            DiagnosticCode.Type_0_is_not_assignable_to_type_1,
+            DiagnosticCode.Type_expected,
-            declaration.type.range, "*", resolvedType.toString()
+            declaration.type.range
           );
           return false;
         }
         global.type = resolvedType;
+
+      // infer from initializer if not annotated
       } else if (declaration.initializer) { // infer type using void/NONE for literal inference
         initExpr = this.compileExpression( // reports
           declaration.initializer,
@@ -494,6 +499,8 @@ export class Compiler extends DiagnosticEmitter {
           return false;
         }
         global.type = this.currentType;
+
+      // must either be annotated or have an initializer
       } else {
         this.error(
           DiagnosticCode.Type_expected,
@@ -505,7 +512,10 @@ export class Compiler extends DiagnosticEmitter {
 
     var nativeType = global.type.toNativeType();
 
+    // handle imports
     if (global.is(ElementFlags.DECLARED)) {
+
+      // constant global
       if (global.is(ElementFlags.CONSTANT)) {
         this.module.addGlobalImport(
           global.internalName,
@@ -517,6 +527,8 @@ export class Compiler extends DiagnosticEmitter {
         );
         global.set(ElementFlags.COMPILED);
         return true;
+
+      // importing mutable globals is not supported in the MVP
       } else {
         this.error(
           DiagnosticCode.Operation_not_supported,
@@ -526,16 +538,26 @@ export class Compiler extends DiagnosticEmitter {
       return false;
     }
 
+    // the MVP does not yet support initializer expressions other than constant values (and
+    // get_globals), hence such initializations must be performed in the start function for now.
     var initializeInStart = false;
 
+    // inlined constant can be compiled as-is
     if (global.is(ElementFlags.INLINED)) {
       initExpr = this.compileInlineConstant(global, global.type, true);
+
     } else {
+
+      // evaluate initializer if present
       if (declaration.initializer) {
         if (!initExpr) {
           initExpr = this.compileExpression(declaration.initializer, global.type);
         }
+
+        // check if the initializer is constant
         if (_BinaryenExpressionGetId(initExpr) != ExpressionId.Const) {
+
+          // if a constant global, check if the initializer becomes constant after precompute
           if (global.is(ElementFlags.CONSTANT)) {
             initExpr = this.precomputeExpressionRef(initExpr);
             if (_BinaryenExpressionGetId(initExpr) != ExpressionId.Const) {
@@ -549,17 +571,22 @@ export class Compiler extends DiagnosticEmitter {
             initializeInStart = true;
           }
         }
+
+      // initialize to zero if there's no initializer
       } else {
         initExpr = global.type.toNativeZero(this.module);
       }
     }
 
     var internalName = global.internalName;
-    if (initializeInStart) {
+
+    if (initializeInStart) { // initialize to mutable zero and set the actual value in start
       this.module.addGlobal(internalName, nativeType, true, global.type.toNativeZero(this.module));
       var setExpr = this.module.createSetGlobal(internalName, initExpr);
       this.startFunctionBody.push(setExpr);
-    } else {
+
+    } else { // compile as-is
+
       if (global.is(ElementFlags.CONSTANT)) {
         var exprType = _BinaryenExpressionGetType(initExpr);
         switch (exprType) {
@@ -590,18 +617,18 @@ export class Compiler extends DiagnosticEmitter {
           default:
             throw new Error("concrete type expected");
         }
-        global.set(ElementFlags.INLINED);
+        global.set(ElementFlags.INLINED); // inline the value from now on
-        if (declaration.isTopLevel) { // might be re-exported
+        if (declaration.isTopLevel) {     // but keep the element if it might be re-exported
-          this.module.addGlobal(internalName, nativeType, !global.is(ElementFlags.CONSTANT), initExpr);
+          this.module.addGlobal(internalName, nativeType, false, initExpr);
         }
         if (declaration.range.source.isEntry && declaration.isTopLevelExport) {
           this.module.addGlobalExport(global.internalName, declaration.programLevelInternalName);
         }
-      } else {
+
+      } else /* mutable */ {
         this.module.addGlobal(internalName, nativeType, !global.is(ElementFlags.CONSTANT), initExpr);
       }
     }
-    global.set(ElementFlags.COMPILED);
     return true;
   }
 
@@ -615,8 +642,6 @@ export class Compiler extends DiagnosticEmitter {
 
   compileEnum(element: Enum): bool {
     if (element.is(ElementFlags.COMPILED)) return true;
-
-    // members might reference each other, triggering another compile
     element.set(ElementFlags.COMPILED);
 
     this.currentEnum = element;
@@ -711,6 +736,7 @@ export class Compiler extends DiagnosticEmitter {
 
   // functions
 
+  /** Compiles a function given its declaration. */
   compileFunctionDeclaration(
     declaration: FunctionDeclaration,
     typeArguments: TypeNode[],
@@ -728,13 +754,14 @@ export class Compiler extends DiagnosticEmitter {
     );
   }
 
+  /** Resolves the specified type arguments prior to compiling the resulting function instance. */
   compileFunctionUsingTypeArguments(
     prototype: FunctionPrototype,
     typeArguments: TypeNode[],
     contextualTypeArguments: Map<string,Type> | null,
     reportNode: Node
   ): Function | null {
-    var instance = prototype.resolveInclTypeArguments( // reports
+    var instance = prototype.resolveUsingTypeArguments( // reports
       typeArguments,
       contextualTypeArguments,
       reportNode
@@ -743,6 +770,7 @@ export class Compiler extends DiagnosticEmitter {
     return this.compileFunction(instance) ? instance : null;
   }
 
+  /** Compiles a readily resolved function instance. */
   compileFunction(instance: Function): bool {
     if (instance.is(ElementFlags.COMPILED)) return true;
 
@@ -1064,7 +1092,7 @@ export class Compiler extends DiagnosticEmitter {
     contextualTypeArguments: Map<string,Type> | null = null,
     alternativeReportNode: Node | null = null
   ): void {
-    var instance = prototype.resolveInclTypeArguments( // reports
+    var instance = prototype.resolveUsingTypeArguments( // reports
       typeArguments,
       contextualTypeArguments,
       alternativeReportNode
@@ -3029,6 +3057,14 @@ export class Compiler extends DiagnosticEmitter {
             );
             break;
 
+          case TypeKind.F32:
+          case TypeKind.F64:
+            this.error(
+              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,
+              expression.range, Token.operatorToString(expression.operator), this.currentType.toString()
+            );
+            return this.module.createUnreachable();
+
           case TypeKind.VOID:
             this.error(
               DiagnosticCode.Operation_not_supported,
@@ -3097,6 +3133,14 @@ export class Compiler extends DiagnosticEmitter {
             );
             break;
 
+          case TypeKind.F32:
+          case TypeKind.F64:
+            this.error(
+              DiagnosticCode.The_0_operator_cannot_be_applied_to_type_1,
+              expression.range, Token.operatorToString(expression.operator), this.currentType.toString()
+            );
+            return this.module.createUnreachable();
+
           case TypeKind.VOID:
             this.error(
               DiagnosticCode.Operation_not_supported,
@@ -3780,76 +3824,67 @@ export class Compiler extends DiagnosticEmitter {
     if (!resolved) return this.module.createUnreachable();
 
     var element = resolved.element;
-    if (element.kind != ElementKind.FUNCTION_PROTOTYPE) {
+    var functionPrototype: FunctionPrototype;
-      this.error(
+    var functionInstance: Function | null;
-        DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,
+    switch (element.kind) {
-        expression.range, element.internalName
-      );
-      return this.module.createUnreachable();
-    }
 
-    var functionPrototype = <FunctionPrototype>element;
+      // direct function call
-    var functionInstance: Function | null = null;
+      case ElementKind.FUNCTION_PROTOTYPE:
-
+        functionPrototype = <FunctionPrototype>element;
-    // TODO: generalize?
+        if (functionPrototype.is(ElementFlags.BUILTIN)) {
-    if (functionPrototype.is(ElementFlags.BUILTIN)) {
+          let expr = compileBuiltinCall( // reports
-      var resolvedTypeArguments: Type[] | null = null;
+            this,
-      if (expression.typeArguments) {
+            functionPrototype,
-        var k = expression.typeArguments.length;
+            functionPrototype.resolveBuiltinTypeArguments(
-        resolvedTypeArguments = new Array<Type>(k);
+              expression.typeArguments,
-        for (var i = 0; i < k; ++i) {
+              this.currentFunction.contextualTypeArguments
-          var resolvedType = this.program.resolveType( // reports
+            ),
-            expression.typeArguments[i],
+            expression.arguments,
-            this.currentFunction.contextualTypeArguments,
+            contextualType,
-            true
+            expression
           );
-          if (!resolvedType) return this.module.createUnreachable();
+          if (!expr) {
-          resolvedTypeArguments[i] = resolvedType;
+            this.error(
+              DiagnosticCode.Operation_not_supported,
+              expression.range
+            );
+            return this.module.createUnreachable();
+          }
+          return expr;
+        } else {
+          functionInstance = functionPrototype.resolveUsingTypeArguments( // reports
+            expression.typeArguments,
+            this.currentFunction.contextualTypeArguments,
+            expression
+          );
+          if (!functionInstance) return this.module.createUnreachable();
         }
-      }
+        break;
-      var expr = compileBuiltinCall(
+
-        this,
+      // indirect function call
-        functionPrototype,
+      // TODO: currently these are bound to distinct functions, not types.
-        resolvedTypeArguments,
+      case ElementKind.LOCAL:
-        expression.arguments,
+      case ElementKind.GLOBAL:
-        contextualType,
+      case ElementKind.FIELD:
-        expression
+        if ((<VariableLikeElement>element).type.isFunction) {
-      );
+          functionInstance = <Function>(<VariableLikeElement>element).type.functionType;
-      if (!expr) {
+        } else {
+          this.error(
+            DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,
+            expression.range, (<VariableLikeElement>element).type.toString()
+          );
+          return this.module.createUnreachable();
+        }
+        break;
+
+      default:
         this.error(
-          DiagnosticCode.Operation_not_supported,
+          DiagnosticCode.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_Type_0_has_no_compatible_call_signatures,
-          expression.range
+          expression.range, element.internalName
         );
         return this.module.createUnreachable();
-      }
-      return expr;
     }
 
-    // TODO: infer type arguments from parameter types if omitted
-    functionInstance = functionPrototype.resolveInclTypeArguments( // reports
-      expression.typeArguments,
-      this.currentFunction.contextualTypeArguments,
-      expression
-    );
-    if (!functionInstance) return this.module.createUnreachable();
-
-    // TODO: generalize? (see above)
-    /* if (functionInstance.is(ElementFlags.BUILTIN)) {
-      var expr = compileBuiltinCall(
-        this,
-        functionPrototype,
-        functionInstance.typeArguments,
-        expression.arguments,
-        contextualType,
-        expression
-      );
-      if (!expr) {
-        this.error(DiagnosticCode.Operation_not_supported, expression.range);
-        return this.module.createUnreachable();
-      }
-      return expr;
-    } */
-
     var numArguments = expression.arguments.length;
     var numArgumentsInclThis = functionInstance.instanceMethodOf
       ? numArguments + 1
@@ -3861,7 +3896,7 @@ export class Compiler extends DiagnosticEmitter {
       assert(resolved.targetExpression != null);
       args[argumentIndex++] = <Expression>resolved.targetExpression;
     }
-    for (i = 0; i < numArguments; ++i) {
+    for (var i = 0; i < numArguments; ++i) {
       args[argumentIndex++] = expression.arguments[i];
     }
     return this.compileCall(functionInstance, args, expression);
@@ -4413,7 +4448,7 @@ export class Compiler extends DiagnosticEmitter {
     if (resolved) {
       if (resolved.element.kind == ElementKind.CLASS_PROTOTYPE) {
         var prototype = <ClassPrototype>resolved.element;
-        var instance = prototype.resolveInclTypeArguments( // reports
+        var instance = prototype.resolveUsingTypeArguments( // reports
           expression.typeArguments,
           null,
           expression

src/program.ts

@@ -1347,7 +1347,7 @@ export class Program extends DiagnosticEmitter {
     if ((element = this.elements.get(localName)) || (element = this.elements.get(globalName))) {
       switch (element.kind) {
         case ElementKind.CLASS_PROTOTYPE:
-          var instance = (<ClassPrototype>element).resolveInclTypeArguments(
+          var instance = (<ClassPrototype>element).resolveUsingTypeArguments(
             node.typeArguments,
             contextualTypeArguments,
             null
@@ -1402,7 +1402,7 @@ export class Program extends DiagnosticEmitter {
     return null;
   }
 
-  /** Resolves an array of type parameters to concrete types. */
+  /** Resolves an array of type arguments to concrete types. */
   resolveTypeArguments(
     typeParameters: TypeParameter[],
     typeArgumentNodes: TypeNode[] | null,
@@ -1511,7 +1511,10 @@ export class Program extends DiagnosticEmitter {
   ): ResolvedElement | null {
     // start by resolving the lhs target (expression before the last dot)
     var targetExpression = propertyAccess.expression;
-    resolvedElement = this.resolveExpression(targetExpression, contextualFunction); // reports
+    resolvedElement = this.resolveExpression( // reports
+      targetExpression,
+      contextualFunction
+    );
     if (!resolvedElement) return null;
     var target = resolvedElement.element;
 
@@ -1592,10 +1595,16 @@ export class Program extends DiagnosticEmitter {
     return null;
   }
 
-  resolveElementAccess(elementAccess: ElementAccessExpression, contextualFunction: Function): ResolvedElement | null {
+  resolveElementAccess(
+    elementAccess: ElementAccessExpression,
+    contextualFunction: Function
+  ): ResolvedElement | null {
     // start by resolving the lhs target (expression before the last dot)
     var targetExpression = elementAccess.expression;
-    resolvedElement = this.resolveExpression(targetExpression, contextualFunction);
+    resolvedElement = this.resolveExpression(
+      targetExpression,
+      contextualFunction
+    );
     if (!resolvedElement) return null;
     var target = resolvedElement.element;
     switch (target.kind) {
@@ -1625,7 +1634,10 @@ export class Program extends DiagnosticEmitter {
     return null;
   }
 
-  resolveExpression(expression: Expression, contextualFunction: Function): ResolvedElement | null {
+  resolveExpression(
+    expression: Expression,
+    contextualFunction: Function
+  ): ResolvedElement | null {
     var classType: Class | null;
 
     while (expression.kind == NodeKind.PARENTHESIZED) {
@@ -1672,17 +1684,26 @@ export class Program extends DiagnosticEmitter {
         return this.resolveIdentifier(<IdentifierExpression>expression, contextualFunction);
 
       case NodeKind.PROPERTYACCESS:
-        return this.resolvePropertyAccess(<PropertyAccessExpression>expression, contextualFunction);
+        return this.resolvePropertyAccess(
+          <PropertyAccessExpression>expression,
+          contextualFunction
+        );
 
       case NodeKind.ELEMENTACCESS:
-        return this.resolveElementAccess(<ElementAccessExpression>expression, contextualFunction);
+        return this.resolveElementAccess(
+          <ElementAccessExpression>expression,
+          contextualFunction
+        );
 
       case NodeKind.CALL:
-        var resolved = this.resolveExpression((<CallExpression>expression).expression, contextualFunction);
+        var resolved = this.resolveExpression(
+          (<CallExpression>expression).expression,
+          contextualFunction
+        );
         if (resolved) {
           var element = resolved.element;
           if (element && element.kind == ElementKind.FUNCTION_PROTOTYPE) {
-            var instance = (<FunctionPrototype>element).resolveInclTypeArguments(
+            var instance = (<FunctionPrototype>element).resolveUsingTypeArguments(
               (<CallExpression>expression).typeArguments,
               null,
               expression
@@ -2130,6 +2151,7 @@ export class FunctionPrototype extends Element {
     }
   }
 
+  /** Resolves this prototype to an instance using the specified concrete type arguments. */
   resolve(
     functionTypeArguments: Type[] | null = null,
     contextualTypeArguments: Map<string,Type> | null = null
@@ -2226,7 +2248,28 @@ export class FunctionPrototype extends Element {
     return instance;
   }
 
-  resolveInclTypeArguments(
+  /** Resolves this prototype partially by applying the specified inherited class type arguments. */
+  resolvePartial(classTypeArguments: Type[] | null): FunctionPrototype | null {
+    if (!this.classPrototype) {
+      throw new Error("partially resolved instance method must reference its class prototype");
+    }
+    if (classTypeArguments && classTypeArguments.length) {
+      var partialPrototype = new FunctionPrototype(
+        this.program,
+        this.simpleName,
+        this.internalName,
+        this.declaration,
+        this.classPrototype
+      );
+      partialPrototype.flags = this.flags;
+      partialPrototype.classTypeArguments = classTypeArguments;
+      return partialPrototype;
+    }
+    return this; // no need to clone
+  }
+
+  /** Resolves the specified type arguments prior to resolving this prototype to an instance. */
+  resolveUsingTypeArguments(
     typeArgumentNodes: TypeNode[] | null,
     contextualTypeArguments: Map<string,Type> | null,
     reportNode: Node
@@ -2245,23 +2288,27 @@ export class FunctionPrototype extends Element {
     return this.resolve(resolvedTypeArguments, contextualTypeArguments);
   }
 
-  resolvePartial(classTypeArguments: Type[] | null): FunctionPrototype | null {
+  /** Resolves the type arguments to use when compiling a built-in call. Must be a built-in. */
-    if (!this.classPrototype) {
+  resolveBuiltinTypeArguments(
-      throw new Error("partially resolved instance method must reference its class prototype");
+    typeArgumentNodes: TypeNode[] | null,
+    contextualTypeArguments: Map<string,Type> | null
+  ): Type[] | null {
+    assert(this.is(ElementFlags.BUILTIN));
+    var resolvedTypeArguments: Type[] | null = null;
+    if (typeArgumentNodes) {
+      var k = typeArgumentNodes.length;
+      resolvedTypeArguments = new Array<Type>(k);
+      for (var i = 0; i < k; ++i) {
+        var resolvedType = this.program.resolveType( // reports
+          typeArgumentNodes[i],
+          contextualTypeArguments,
+          true
+        );
+        if (!resolvedType) return null;
+        resolvedTypeArguments[i] = resolvedType;
+      }
     }
-    if (classTypeArguments && classTypeArguments.length) {
+    return resolvedTypeArguments;
-      var partialPrototype = new FunctionPrototype(
-        this.program,
-        this.simpleName,
-        this.internalName,
-        this.declaration,
-        this.classPrototype
-      );
-      partialPrototype.flags = this.flags;
-      partialPrototype.classTypeArguments = classTypeArguments;
-      return partialPrototype;
-    }
-    return this; // no need to clone
   }
 
   toString(): string { return this.simpleName; }
@@ -2650,7 +2697,11 @@ export class ClassPrototype extends Element {
     }
   }
 
-  resolve(typeArguments: Type[] | null, contextualTypeArguments: Map<string,Type> | null = null): Class | null {
+  /** Resolves this prototype to an instance using the specified concrete type arguments. */
+  resolve(
+    typeArguments: Type[] | null,
+    contextualTypeArguments: Map<string,Type> | null = null
+  ): Class | null {
     var instanceKey = typeArguments ? typesToString(typeArguments) : "";
     var instance = this.instances.get(instanceKey);
     if (instance) return instance;
@@ -2790,7 +2841,8 @@ export class ClassPrototype extends Element {
     return instance;
   }
 
-  resolveInclTypeArguments(
+  /** Resolves the specified type arguments prior to resolving this prototype to an instance. */
+  resolveUsingTypeArguments(
     typeArgumentNodes: TypeNode[] | null,
     contextualTypeArguments: Map<string,Type> | null,
     alternativeReportNode: Node | null

tests/compiler/function-expression.optimized.wat

@@ -5,11 +5,24 @@
  (elem (i32.const 0) $start~anonymous|0 $start~anonymous|0 $start~someName|2)
  (memory $0 1)
  (export "memory" (memory $0))
- (start $start~someName|2)
+ (start $start)
  (func $start~anonymous|0 (; 0 ;) (type $ii) (param $0 i32) (result i32)
   (get_local $0)
  )
  (func $start~someName|2 (; 1 ;) (type $v)
   (nop)
  )
+ (func $start (; 2 ;) (type $v)
+  (drop
+   (call $start~anonymous|0
+    (i32.const 1)
+   )
+  )
+  (drop
+   (call $start~anonymous|0
+    (i32.const 2)
+   )
+  )
+  (call $start~someName|2)
+ )
 )

tests/compiler/function-expression.ts

@@ -1,11 +1,11 @@
 var f1 = function(a: i32): i32 {
   return a;
 };
-f1;
+f1(1);
 var f2 = (a: i32): i32 => {
   return a;
 };
-f2;
+f2(2);
 var f3 = function someName(): void {
 };
-f3;
+f3();

tests/compiler/function-expression.untouched.wat

@@ -24,13 +24,15 @@
  )
  (func $start (; 3 ;) (type $v)
   (drop
-   (get_global $function-expression/f1)
+   (call $start~anonymous|0
+    (i32.const 1)
+   )
   )
   (drop
-   (get_global $function-expression/f2)
+   (call $start~anonymous|1
-  )
+    (i32.const 2)
-  (drop
+   )
-   (get_global $function-expression/f3)
   )
+  (call $start~someName|2)
  )
 )

webpack.config.js

@@ -4,7 +4,6 @@ const webpack = require("webpack");
 
 // Build the C-like library
 const lib = {
-  mode: "production",
   entry: [ "./src/glue/js", "./src/index.ts" ],
   module: {
     rules: [
@@ -23,10 +22,8 @@ const lib = {
     filename: "assemblyscript.js",
     path: path.resolve(__dirname, "dist"),
     library: "assemblyscript",
-    libraryTarget: "umd"
+    libraryTarget: "umd",
-  },
+    globalObject: "typeof self !== 'undefined' ? self : this"
-  optimization: {
-    minimize: true
   },
   devtool: "source-map",
   performance: {
@@ -36,16 +33,10 @@ const lib = {
 
 // Build asc for browser usage
 const bin = {
-  mode: "production",
   context: path.join(__dirname, "bin"),
   entry: [ "./asc.js" ],
   externals: [{
-    "../dist/assemblyscript.js": {
+    "../dist/assemblyscript.js": "assemblyscript"
-      commonjs: "assemblyscript",
-      commonjs2: "assemblyscript",
-      amd: "assemblyscript",
-      root: "_"
-    }
   }],
   node: {
     "fs": "empty",
@@ -57,10 +48,8 @@ const bin = {
     filename: "asc.js",
     path: path.resolve(__dirname, "dist"),
     library: "asc",
-    libraryTarget: "umd"
+    libraryTarget: "umd",
-  },
+    globalObject: "typeof self !== 'undefined' ? self : this"
-  optimization: {
-    minimize: true
   },
   devtool: "source-map",
   plugins: [
@@ -79,7 +68,7 @@ const bin = {
       },
       __dirname: JSON.stringify(".")
     }),
-    new webpack.IgnorePlugin(/\.\/src|package\.json|^(\.\/assemblyscript|ts\-node|glob|source\-map\-support)$/),
+    new webpack.IgnorePlugin(/\.\/src|package\.json|^(ts\-node|glob|source\-map\-support)$/),
   ]
 };