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b3092c61b6
* Add missing generators feature flags * Generate files * Add generators flags * fixup! Add generators flags
49 lines
1.5 KiB
JavaScript
49 lines
1.5 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-generator-function-definitions
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es6id: 14.4
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description: >
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YieldExpression contextually recognizes the `in` keyword as part of a
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RelationalExpression
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info: |
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Syntax
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yield [no LineTerminator here] AssignmentExpression[?In, +Yield]
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features: [generators, Symbol.iterator]
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---*/
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var obj = Object.create({ hit: true });
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var iter, iterResult, value;
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Boolean.prototype[Symbol.iterator] = function* () { yield this.valueOf(); };
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function* g() {
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value = yield * 'hit' in obj;
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value = yield * 'miss' in obj;
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}
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iter = g();
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iterResult = iter.next('first');
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assert.sameValue(iterResult.done, false, '`done` property (first iteration)');
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assert.sameValue(iterResult.value, true, '`value` property (first iteration)');
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assert.sameValue(
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value, undefined, 'generator paused prior to evaluating AssignmentExpression'
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);
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iterResult = iter.next('second');
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assert.sameValue(iterResult.done, false, '`done` property (second iteration)');
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assert.sameValue(
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iterResult.value, false, '`value` property (second iteration)'
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);
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assert.sameValue(value, undefined, 'value of first AssignmentExpression');
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iterResult = iter.next('third');
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assert.sameValue(iterResult.done, true, '`done` property (third iteration)');
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assert.sameValue(
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iterResult.value, undefined, '`value` property (third iteration)'
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);
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assert.sameValue(value, undefined, 'value of second AssignmentExpression');
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