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34 lines
1.2 KiB
JavaScript
34 lines
1.2 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: 13.7.5.11
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description: >
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Completion value when head has no declaration and iteration occurs
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info: |
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IterationStatement :
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for ( LeftHandSideExpression of AssignmentExpression ) Statement
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1. Let keyResult be the result of performing ForIn/OfHeadEvaluation( « »,
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AssignmentExpression, iterate).
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2. ReturnIfAbrupt(keyResult).
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3. Return ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
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keyResult, assignment, labelSet).
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13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
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[...]
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2. Let V = undefined.
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[...]
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5. Repeat
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a. Let nextResult be IteratorStep(iterator).
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b. ReturnIfAbrupt(nextResult).
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c. If nextResult is false, return NormalCompletion(V).
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[...]
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k. Let result be the result of evaluating stmt.
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[...]
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n. If result.[[value]] is not empty, let V be result.[[value]].
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---*/
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assert.sameValue(eval('var a; 1; for (a of [0]) { }'), undefined);
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assert.sameValue(eval('var b; 2; for (b of [0]) { 3; }'), 3);
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