mirror of https://github.com/tc39/test262.git
57 lines
2.0 KiB
JavaScript
57 lines
2.0 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-assignment-for-await/array-elem-init-fn-name-arrow.case
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// - src/dstr-assignment-for-await/default/async-func-decl.template
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/*---
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description: Assignment of function `name` attribute (ArrowFunction) (for-await-of statement in an async function declaration)
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esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
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features: [destructuring-binding, async-iteration]
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flags: [generated, async]
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includes: [propertyHelper.js]
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info: |
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IterationStatement :
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for await ( 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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5. 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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AssignmentElement[Yield] : DestructuringAssignmentTarget Initializeropt
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[...] 7. If Initializer is present and value is undefined and
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IsAnonymousFunctionDefinition(Initializer) and IsIdentifierRef of
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DestructuringAssignmentTarget are both true, then
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a. Let hasNameProperty be ? HasOwnProperty(v, "name").
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b. If hasNameProperty is false, perform SetFunctionName(v, GetReferencedName(lref)).
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---*/
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let arrow;
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let iterCount = 0;
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async function fn() {
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for await ([ arrow = () => {} ] of [[]]) {
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verifyProperty(arrow, 'name', {
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enumerable: false,
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writable: false,
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configurable: true,
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value: 'arrow'
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});
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iterCount += 1;
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}
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}
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let promise = fn();
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promise
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.then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
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.then($DONE, $DONE);
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