cc27c4c41b
The current specification has GeneratorFunction() be like Function(), except that it makes generator instances. This commit implements that behavior. It also fills in a piece of the implementation where otherwise calling GeneratorFunction or GeneratorFunctionPrototype would cause an abort because they have no code. R=mstarzinger@chromium.org TEST=mjsunit/harmony/generators-iteration TEST=mjsunit/harmony/generators-runtime BUG=v8:2355,v8:2680 Review URL: https://codereview.chromium.org/15218004 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15084 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
93 lines
3.7 KiB
JavaScript
93 lines
3.7 KiB
JavaScript
// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"use strict";
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// This file relies on the fact that the following declarations have been made
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// in runtime.js:
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// var $Function = global.Function;
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// ----------------------------------------------------------------------------
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// Generator functions and objects are specified by ES6, sections 15.19.3 and
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// 15.19.4.
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function GeneratorObjectNext(value) {
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if (!IS_GENERATOR(this)) {
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throw MakeTypeError('incompatible_method_receiver',
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['[Generator].prototype.next', this]);
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}
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return %_GeneratorNext(this, value);
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}
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function GeneratorObjectThrow(exn) {
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if (!IS_GENERATOR(this)) {
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throw MakeTypeError('incompatible_method_receiver',
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['[Generator].prototype.throw', this]);
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}
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return %_GeneratorThrow(this, exn);
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}
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function GeneratorFunctionPrototypeConstructor(x) {
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if (%_IsConstructCall()) {
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throw MakeTypeError('not_constructor', ['GeneratorFunctionPrototype']);
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}
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}
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function GeneratorFunctionConstructor(arg1) { // length == 1
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var source = NewFunctionString(arguments, 'function*');
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var global_receiver = %GlobalReceiver(global);
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// Compile the string in the constructor and not a helper so that errors
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// appear to come from here.
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var f = %_CallFunction(global_receiver, %CompileString(source, true));
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%FunctionMarkNameShouldPrintAsAnonymous(f);
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return f;
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}
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function SetUpGenerators() {
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%CheckIsBootstrapping();
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var GeneratorObjectPrototype = GeneratorFunctionPrototype.prototype;
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InstallFunctions(GeneratorObjectPrototype,
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DONT_ENUM | DONT_DELETE | READ_ONLY,
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["next", GeneratorObjectNext,
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"throw", GeneratorObjectThrow]);
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%SetProperty(GeneratorObjectPrototype, "constructor",
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GeneratorFunctionPrototype, DONT_ENUM | DONT_DELETE | READ_ONLY);
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%SetPrototype(GeneratorFunctionPrototype, $Function.prototype);
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%SetCode(GeneratorFunctionPrototype, GeneratorFunctionPrototypeConstructor);
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%SetProperty(GeneratorFunctionPrototype, "constructor",
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GeneratorFunction, DONT_ENUM | DONT_DELETE | READ_ONLY);
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%SetPrototype(GeneratorFunction, $Function);
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%SetCode(GeneratorFunction, GeneratorFunctionConstructor);
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}
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SetUpGenerators();
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