mirror of https://github.com/tc39/test262.git
91 lines
2.6 KiB
JavaScript
91 lines
2.6 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-binding/ary-ptrn-rest-ary-elision.case
|
|
// - src/dstr-binding/default/for-await-of-async-gen-var.template
|
|
/*---
|
|
description: Rest element containing an elision (for-await-of statement)
|
|
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
|
|
features: [generators, 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.
|
|
[...]
|
|
|
|
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
|
|
|
|
BindingRestElement : ... BindingPattern
|
|
|
|
1. Let A be ArrayCreate(0).
|
|
[...]
|
|
3. Repeat
|
|
[...]
|
|
b. If iteratorRecord.[[done]] is true, then
|
|
i. Return the result of performing BindingInitialization of
|
|
BindingPattern with A and environment as the arguments.
|
|
[...]
|
|
|
|
13.3.3.6 Runtime Semantics: IteratorBindingInitialization
|
|
|
|
ArrayBindingPattern : [ Elision ]
|
|
|
|
1. Return the result of performing
|
|
IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
|
|
as the argument.
|
|
|
|
12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
|
|
|
|
Elision : ,
|
|
|
|
1. 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.
|
|
2. Return NormalCompletion(empty).
|
|
|
|
---*/
|
|
var first = 0;
|
|
var second = 0;
|
|
function* g() {
|
|
first += 1;
|
|
yield;
|
|
second += 1;
|
|
};
|
|
|
|
var iterCount = 0;
|
|
|
|
async function *fn() {
|
|
for await (var [...[,]] of [g()]) {
|
|
assert.sameValue(first, 1);
|
|
assert.sameValue(second, 1);
|
|
|
|
iterCount += 1;
|
|
}
|
|
}
|
|
|
|
fn().next()
|
|
.then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
|
|
.then($DONE, $DONE);
|
|
|