Source code
Revision control
Copy as Markdown
Other Tools
// |reftest| async
// This file was procedurally generated from the following sources:
// - src/dstr-assignment-for-await/array-elem-iter-get-err.case
// - src/dstr-assignment-for-await/async-generator/async-gen-decl.template
/*---
description: Abrupt completion returned from GetIterator (for-await-of statement in an async generator declaration)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [Symbol.iterator, 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.
[...]
ArrayAssignmentPattern : [ AssignmentElementList ]
1. Let iterator be ? GetIterator(value).
---*/
let iterable = {
[Symbol.iterator]() {
throw new Test262Error();
}
};
let _;
let iterCount = 0;
async function * fn() {
for await ([ _ ] of [iterable]) {
iterCount += 1;
}
}
let iter = fn();
iter.next().then(() => $DONE('Promise incorrectly fulfilled.'), ({ constructor }) => {
assert.sameValue(constructor, Test262Error);
}).then($DONE, $DONE);