Source code
Revision control
Copy as Markdown
Other Tools
// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-elem-ary-empty-iter.case
// - src/dstr-binding/default/for-of-const.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
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 initCount = 0;
var iterCount = 0;
for (const [[] = function() { initCount += 1; }()] of [[[23]]]) {
assert.sameValue(initCount, 0);
iterCount += 1;
}
assert.sameValue(iterCount, 1, 'iteration occurred as expected');
reportCompare(0, 0);