mirror of https://github.com/tc39/test262.git
70 lines
2.1 KiB
JavaScript
70 lines
2.1 KiB
JavaScript
// This file was procedurally generated from the following sources:
|
|
// - src/dstr-binding/ary-ptrn-elem-ary-rest-iter.case
|
|
// - src/dstr-binding/default/for-of-let.template
|
|
/*---
|
|
description: BindingElement with array binding pattern and initializer is not used (for-of statement)
|
|
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
|
|
es6id: 13.7.5.11
|
|
features: [destructuring-binding]
|
|
flags: [generated]
|
|
info: |
|
|
IterationStatement :
|
|
for ( ForDeclaration of AssignmentExpression ) Statement
|
|
|
|
[...]
|
|
3. Return ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
|
|
lexicalBinding, labelSet).
|
|
|
|
13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
|
|
|
|
[...]
|
|
3. Let destructuring be IsDestructuring of lhs.
|
|
[...]
|
|
5. Repeat
|
|
[...]
|
|
h. If destructuring is false, then
|
|
[...]
|
|
i. 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
|
|
|
|
BindingElement : BindingPatternInitializer opt
|
|
|
|
1. If iteratorRecord.[[done]] is false, then
|
|
a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
|
|
[...]
|
|
e. Else,
|
|
i. Let v be IteratorValue(next).
|
|
[...]
|
|
4. Return the result of performing BindingInitialization of BindingPattern
|
|
with v and environment as the arguments.
|
|
---*/
|
|
var values = [2, 1, 3];
|
|
var initCount = 0;
|
|
|
|
var iterCount = 0;
|
|
|
|
for (let [[...x] = function() { initCount += 1; }()] of [[values]]) {
|
|
assert(Array.isArray(x));
|
|
assert.sameValue(x[0], 2);
|
|
assert.sameValue(x[1], 1);
|
|
assert.sameValue(x[2], 3);
|
|
assert.sameValue(x.length, 3);
|
|
assert.notSameValue(x, values);
|
|
assert.sameValue(initCount, 0);
|
|
|
|
iterCount += 1;
|
|
}
|
|
|
|
assert.sameValue(iterCount, 1, 'Iteration occurred as expected');
|