| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| "use strict"; |
| |
| // This file relies on the fact that the following declarations have been made |
| // in runtime.js: |
| // var $Function = global.Function; |
| |
| // ---------------------------------------------------------------------------- |
| |
| |
| // 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('incompatible_method_receiver', |
| ['[Generator].prototype.next', this]); |
| } |
| |
| return %_GeneratorNext(this, value); |
| } |
| |
| function GeneratorObjectThrow(exn) { |
| if (!IS_GENERATOR(this)) { |
| throw MakeTypeError('incompatible_method_receiver', |
| ['[Generator].prototype.throw', this]); |
| } |
| |
| return %_GeneratorThrow(this, exn); |
| } |
| |
| function GeneratorFunctionPrototypeConstructor(x) { |
| if (%_IsConstructCall()) { |
| throw MakeTypeError('not_constructor', ['GeneratorFunctionPrototype']); |
| } |
| } |
| |
| function GeneratorFunctionConstructor(arg1) { // length == 1 |
| var source = NewFunctionString(arguments, 'function*'); |
| var global_receiver = %GlobalReceiver(global); |
| // Compile the string in the constructor and not a helper so that errors |
| // appear to come from here. |
| var f = %_CallFunction(global_receiver, %CompileString(source, true)); |
| %FunctionMarkNameShouldPrintAsAnonymous(f); |
| return f; |
| } |
| |
| |
| function SetUpGenerators() { |
| %CheckIsBootstrapping(); |
| var GeneratorObjectPrototype = GeneratorFunctionPrototype.prototype; |
| InstallFunctions(GeneratorObjectPrototype, |
| DONT_ENUM | DONT_DELETE | READ_ONLY, |
| ["next", GeneratorObjectNext, |
| "throw", GeneratorObjectThrow]); |
| %SetProperty(GeneratorObjectPrototype, "constructor", |
| GeneratorFunctionPrototype, DONT_ENUM | DONT_DELETE | READ_ONLY); |
| %SetPrototype(GeneratorFunctionPrototype, $Function.prototype); |
| %SetCode(GeneratorFunctionPrototype, GeneratorFunctionPrototypeConstructor); |
| %SetProperty(GeneratorFunctionPrototype, "constructor", |
| GeneratorFunction, DONT_ENUM | DONT_DELETE | READ_ONLY); |
| %SetPrototype(GeneratorFunction, $Function); |
| %SetCode(GeneratorFunction, GeneratorFunctionConstructor); |
| } |
| |
| SetUpGenerators(); |