mirror of https://github.com/tc39/test262.git
39 lines
1.0 KiB
JavaScript
39 lines
1.0 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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es6id: 25.2.1
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description: >
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super must be called to initialize GeneratorFunction internal slots
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info: |
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25.2.1 The GeneratorFunction Constructor
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...
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GeneratorFunction is designed to be subclassable. It may be used as the value
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of an extends clause of a class definition. Subclass constructors that intend
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to inherit the specified GeneratorFunction behaviour must include a super call
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to the GeneratorFunction constructor to create and initialize subclass
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instances with the internal slots necessary for built-in GeneratorFunction
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behaviour.
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...
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---*/
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var GeneratorFunction = Object.getPrototypeOf(function* () {}).constructor;
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class GFn1 extends GeneratorFunction {
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constructor() {}
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}
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assert.throws(ReferenceError, function() {
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new GFn1();
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});
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class GFn2 extends GeneratorFunction {
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constructor() {
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super();
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}
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}
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var fn = new GFn2();
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assert(fn instanceof GeneratorFunction);
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