summaryrefslogtreecommitdiffstats
path: root/js/src/tests/test262/language/statements/for-of/dstr/array-elem-target-identifier.js
blob: dabe6c34d95bec4eb57a0eb40d32a2a19b87801d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
// This file was procedurally generated from the following sources:
// - src/dstr-assignment/array-elem-target-identifier.case
// - src/dstr-assignment/default/for-of.template
/*---
description: Identifiers that appear as the DestructuringAssignmentTarget in an AssignmentElement should take on the iterated value corresponding to their position in the ArrayAssignmentPattern. (For..of statement)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [destructuring-binding]
flags: [generated]
info: |
    IterationStatement :
      for ( LeftHandSideExpression of AssignmentExpression ) Statement

    1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
       AssignmentExpression, iterate).
    2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
       keyResult, assignment, labelSet).

    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation

    [...]
    4. If destructuring is true and if lhsKind is assignment, then
       a. Assert: lhs is a LeftHandSideExpression.
       b. Let assignmentPattern be the parse of the source text corresponding to
          lhs using AssignmentPattern as the goal symbol.
    [...]
---*/
var x, y, z;

var counter = 0;

for ([x, y, z] of [[1, 2, 3]]) {
  assert.sameValue(x, 1);
  assert.sameValue(y, 2);
  assert.sameValue(z, 3);
  counter += 1;
}

assert.sameValue(counter, 1);

reportCompare(0, 0);