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54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-assignment/obj-prop-nested-array-yield-expr.case
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// - src/dstr-assignment/default/for-of.template
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/*---
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description: When a `yield` token appears within the Initializer of a nested destructuring assignment and within a generator function body, it should behave as a YieldExpression. (For..of statement)
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esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
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es6id: 13.7.5.11
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features: [generators, destructuring-binding]
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flags: [generated]
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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. 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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4. If destructuring is true and if lhsKind is assignment, then
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a. Assert: lhs is a LeftHandSideExpression.
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b. Let assignmentPattern be the parse of the source text corresponding to
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lhs using AssignmentPattern as the goal symbol.
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[...]
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---*/
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var iterationResult, iter, x;
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iter = (function*() {
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var counter = 0;
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for ({ x: [x = yield] } of [{ x: [] }]) {
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counter += 1;
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}
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assert.sameValue(counter, 1);
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}());
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iterationResult = iter.next();
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assert.sameValue(iterationResult.value, undefined);
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assert.sameValue(iterationResult.done, false);
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assert.sameValue(x, undefined);
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iterationResult = iter.next(24601);
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assert.sameValue(iterationResult.value, undefined);
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assert.sameValue(iterationResult.done, true);
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assert.sameValue(x, 24601);
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