mirror of https://github.com/tc39/test262.git
42 lines
1.5 KiB
JavaScript
42 lines
1.5 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-assignment-for-await/obj-prop-identifier-resolution-trlng.case
|
|
// - src/dstr-assignment-for-await/default/async-gen-decl.template
|
|
/*---
|
|
description: Evaluation of DestructuringAssignmentTarget (lone element with trailing comma). (for-await-of statement in an async generator declaration)
|
|
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
|
|
features: [destructuring-binding, async-iteration]
|
|
flags: [generated, async]
|
|
info: |
|
|
IterationStatement :
|
|
for await ( LeftHandSideExpression of AssignmentExpression ) Statement
|
|
|
|
1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
|
|
AssignmentExpression, iterate).
|
|
2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
|
|
keyResult, assignment, labelSet).
|
|
|
|
13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
|
|
|
|
[...]
|
|
5. If destructuring is true and if lhsKind is assignment, then
|
|
a. Assert: lhs is a LeftHandSideExpression.
|
|
b. Let assignmentPattern be the parse of the source text corresponding to
|
|
lhs using AssignmentPattern as the goal symbol.
|
|
[...]
|
|
---*/
|
|
let x = null;
|
|
|
|
let iterCount = 0;
|
|
async function * fn() {
|
|
for await ({ a: x, } of [{ a: 2 }]) {
|
|
assert.sameValue(x, 2);
|
|
iterCount += 1;
|
|
}
|
|
}
|
|
|
|
let promise = fn().next();
|
|
|
|
promise
|
|
.then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
|
|
.then($DONE, $DONE);
|