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35 lines
1.0 KiB
JavaScript
35 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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esid: sec-generatorfunction
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description: Definition of instance `length` property
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info: |
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[...]
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3. Return CreateDynamicFunction(C, NewTarget, "generator", args).
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19.2.1.1.1 Runtime Semantics: CreateDynamicFunction
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[...]
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20. If kind is "generator", then
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a. If parameters Contains YieldExpression is true, throw a SyntaxError
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exception.
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features: [generators]
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---*/
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var GeneratorFunction = Object.getPrototypeOf(function*() {}).constructor;
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// YieldExpression is permitted in function body.
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GeneratorFunction('x = yield');
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assert.throws(SyntaxError, function() {
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GeneratorFunction('x = yield', '');
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}, 'YieldExpression not permitted generally');
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var withinGenerator = function*() {
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GeneratorFunction('x = yield', '');
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};
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assert.throws(SyntaxError, function() {
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withinGenerator().next();
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}, 'YieldExpression not permitted when calling context is a generator');
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