mirror of https://github.com/tc39/test262.git
76 lines
2.4 KiB
JavaScript
76 lines
2.4 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-binding-for-await/ary-ptrn-elem-id-iter-val.case
|
|
// - src/dstr-binding-for-await/default/for-await-of-async-gen-const-async.template
|
|
/*---
|
|
description: SingleNameBinding when value iteration was completed previously (for-await-of statement)
|
|
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
|
|
features: [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.
|
|
[...]
|
|
|
|
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
|
|
|
|
SingleNameBinding : BindingIdentifier Initializer_opt
|
|
|
|
[...]
|
|
3. If iteratorRecord.[[done]] is false, then
|
|
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
|
|
b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
|
|
c. ReturnIfAbrupt(next).
|
|
d. If next is false, set iteratorRecord.[[done]] to true.
|
|
e. Else,
|
|
i. Let v be IteratorValue(next).
|
|
ii. If v is an abrupt completion, set
|
|
iteratorRecord.[[done]] to true.
|
|
iii. ReturnIfAbrupt(v).
|
|
4. If iteratorRecord.[[done]] is true, let v be undefined.
|
|
[...]
|
|
7. Return InitializeReferencedBinding(lhs, v).
|
|
---*/
|
|
|
|
var iterCount = 0;
|
|
var asyncIter = (async function*() {
|
|
yield* [[1, 2, 3]];
|
|
})();
|
|
|
|
async function *fn() {
|
|
for await (const [x, y, z] of asyncIter) {
|
|
assert.sameValue(x, 1);
|
|
assert.sameValue(y, 2);
|
|
assert.sameValue(z, 3);
|
|
|
|
iterCount += 1;
|
|
}
|
|
}
|
|
|
|
fn().next()
|
|
.then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
|
|
.then($DONE, $DONE);
|