mirror of https://github.com/tc39/test262.git
73 lines
1.9 KiB
JavaScript
73 lines
1.9 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-binding-for-await/ary-init-iter-close.case
|
|
// - src/dstr-binding-for-await/default/for-await-of-async-gen-var.template
|
|
/*---
|
|
description: Iterator is closed when not exhausted by pattern evaluation (for-await-of statement)
|
|
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 ( var ForBinding of AssignmentExpression ) Statement
|
|
|
|
[...]
|
|
2. Return ? ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult,
|
|
varBinding, 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
|
|
1. Assert: lhs is a ForBinding.
|
|
2. Let status be the result of performing BindingInitialization
|
|
for lhs passing nextValue and undefined as the arguments.
|
|
[...]
|
|
|
|
13.3.3.5 Runtime Semantics: BindingInitialization
|
|
|
|
BindingPattern : ArrayBindingPattern
|
|
|
|
[...]
|
|
4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
|
|
result).
|
|
[...]
|
|
|
|
---*/
|
|
var doneCallCount = 0;
|
|
var iter = {};
|
|
iter[Symbol.iterator] = function() {
|
|
return {
|
|
next() {
|
|
return { value: null, done: false };
|
|
},
|
|
return() {
|
|
doneCallCount += 1;
|
|
return {};
|
|
}
|
|
};
|
|
};
|
|
|
|
var iterCount = 0;
|
|
|
|
async function *fn() {
|
|
for await (var [x] of [iter]) {
|
|
assert.sameValue(doneCallCount, 1);
|
|
|
|
iterCount += 1;
|
|
}
|
|
}
|
|
|
|
fn().next()
|
|
.then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
|
|
.then($DONE, $DONE);
|
|
|