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44 lines
1.4 KiB
JavaScript
44 lines
1.4 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 accepts a regular expression literal as its right-hand side
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info: |
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The syntactic context immediately following yield requires use of the
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InputElementRegExpOrTemplateTail lexical goal.
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features: [generators]
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---*/
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var complete = false;
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var sent = {};
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var iter, iterResult, received;
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// Unused variables declared to improve error messages in incorrect parsing
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// scenarios.
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var abc, i;
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function* g() {
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received = yield/abc/i;
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complete = true;
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}
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iter = g();
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assert.sameValue(complete, false, 'generator initially paused');
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assert.sameValue(received, undefined, 'first statement no executed');
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iterResult = iter.next();
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assert.sameValue(complete, false, 'generator paused following expression');
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assert.sameValue(received, undefined, 'first statement not executed');
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assert.sameValue(iterResult.done, false, 'iteration not complete');
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assert.sameValue(iterResult.value.test('ABC'), true, 'first iterated value');
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iterResult = iter.next(sent);
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assert.sameValue(received, sent, 'YieldExpression value');
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assert.sameValue(complete, true, 'generator correctly re-started');
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assert.sameValue(iterResult.done, true, 'iteration complete');
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assert.sameValue(iterResult.value, undefined, 'second iterated value');
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