Source code
Revision control
Copy as Markdown
Other Tools
// |reftest| async
// This file was procedurally generated from the following sources:
// - src/dstr-binding-for-await/ary-ptrn-elision-iter-close.case
// - src/dstr-binding-for-await/iter-close/for-await-of-async-func-const.template
/*---
description: The iterator is properly consumed by the destructuring pattern (for-await-of statement in an async function)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [generators, destructuring-binding, async-iteration]
flags: [generated, async]
info: |
IterationStatement :
for await ( ForDeclaration of AssignmentExpression ) Statement
[...]
2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
lexicalBinding, labelSet, async).
13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
[...]
4. Let destructuring be IsDestructuring of lhs.
[...]
6. Repeat
[...]
j. If destructuring is false, then
[...]
k. Else
i. If lhsKind is assignment, then
[...]
ii. Else if lhsKind is varBinding, then
[...]
iii. Else,
1. Assert: lhsKind is lexicalBinding.
2. Assert: lhs is a ForDeclaration.
3. Let status be the result of performing BindingInitialization
for lhs passing nextValue and iterationEnv as arguments.
[...]
---*/
const iter = (function* () {
yield;
yield;
})();
async function fn() {
for await (const [,] of [iter]) {
return;
}
}
fn()
.then(() => {
assert.sameValue(iter.next().done, true, 'iteration occurred as expected');
})
.then($DONE, $DONE);