Move builtin JavaScript sources into own directory.

src/generator.js

-// Copyright 2013 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-(function(global, utils) {
-
-"use strict";
-
-%CheckIsBootstrapping();
-
-// -------------------------------------------------------------------
-// Imports
-
-var GlobalFunction = global.Function;
-var NewFunctionString;
-var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
-
-utils.Import(function(from) {
-  NewFunctionString = from.NewFunctionString;
-});
-
-// ----------------------------------------------------------------------------
-
-// Generator functions and objects are specified by ES6, sections 15.19.3 and
-// 15.19.4.
-
-function GeneratorObjectNext(value) {
-  if (!IS_GENERATOR(this)) {
-    throw MakeTypeError(kIncompatibleMethodReceiver,
-                        '[Generator].prototype.next', this);
-  }
-
-  var continuation = %GeneratorGetContinuation(this);
-  if (continuation > 0) {
-    // Generator is suspended.
-    if (DEBUG_IS_ACTIVE) %DebugPrepareStepInIfStepping(this);
-    try {
-      return %_GeneratorNext(this, value);
-    } catch (e) {
-      %GeneratorClose(this);
-      throw e;
-    }
-  } else if (continuation == 0) {
-    // Generator is already closed.
-    return { value: void 0, done: true };
-  } else {
-    // Generator is running.
-    throw MakeTypeError(kGeneratorRunning);
-  }
-}
-
-
-function GeneratorObjectThrow(exn) {
-  if (!IS_GENERATOR(this)) {
-    throw MakeTypeError(kIncompatibleMethodReceiver,
-                        '[Generator].prototype.throw', this);
-  }
-
-  var continuation = %GeneratorGetContinuation(this);
-  if (continuation > 0) {
-    // Generator is suspended.
-    try {
-      return %_GeneratorThrow(this, exn);
-    } catch (e) {
-      %GeneratorClose(this);
-      throw e;
-    }
-  } else if (continuation == 0) {
-    // Generator is already closed.
-    throw exn;
-  } else {
-    // Generator is running.
-    throw MakeTypeError(kGeneratorRunning);
-  }
-}
-
-
-function GeneratorFunctionConstructor(arg1) {  // length == 1
-  var source = NewFunctionString(arguments, 'function*');
-  var global_proxy = %GlobalProxy(GeneratorFunctionConstructor);
-  // Compile the string in the constructor and not a helper so that errors
-  // appear to come from here.
-  var f = %_CallFunction(global_proxy, %CompileString(source, true));
-  %FunctionMarkNameShouldPrintAsAnonymous(f);
-  return f;
-}
-
-// ----------------------------------------------------------------------------
-
-// Both Runtime_GeneratorNext and Runtime_GeneratorThrow are supported by
-// neither Crankshaft nor TurboFan, disable optimization of wrappers here.
-%NeverOptimizeFunction(GeneratorObjectNext);
-%NeverOptimizeFunction(GeneratorObjectThrow);
-
-// Set up non-enumerable functions on the generator prototype object.
-var GeneratorObjectPrototype = GeneratorFunctionPrototype.prototype;
-utils.InstallFunctions(GeneratorObjectPrototype,
-                       DONT_ENUM,
-                      ["next", GeneratorObjectNext,
-                       "throw", GeneratorObjectThrow]);
-
-%AddNamedProperty(GeneratorObjectPrototype, "constructor",
-    GeneratorFunctionPrototype, DONT_ENUM | READ_ONLY);
-%AddNamedProperty(GeneratorObjectPrototype,
-    toStringTagSymbol, "Generator", DONT_ENUM | READ_ONLY);
-%InternalSetPrototype(GeneratorFunctionPrototype, GlobalFunction.prototype);
-%AddNamedProperty(GeneratorFunctionPrototype,
-    toStringTagSymbol, "GeneratorFunction", DONT_ENUM | READ_ONLY);
-%AddNamedProperty(GeneratorFunctionPrototype, "constructor",
-    GeneratorFunction, DONT_ENUM | READ_ONLY);
-%InternalSetPrototype(GeneratorFunction, GlobalFunction);
-%SetCode(GeneratorFunction, GeneratorFunctionConstructor);
-
-})