tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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var-ary-ptrn-rest-ary-elem.js (2552B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-rest-ary-elem.case
      3 // - src/dstr-binding/default/for-of-var.template
      4 /*---
      5 description: Rest element containing an array BindingElementList pattern (for-of statement)
      6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
      7 features: [destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    IterationStatement :
     11        for ( var ForBinding of AssignmentExpression ) Statement
     12 
     13    [...]
     14    3. Return ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult,
     15       varBinding, labelSet).
     16 
     17    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
     18 
     19    [...]
     20    3. Let destructuring be IsDestructuring of lhs.
     21    [...]
     22    5. Repeat
     23       [...]
     24       h. If destructuring is false, then
     25          [...]
     26       i. Else
     27          i. If lhsKind is assignment, then
     28             [...]
     29          ii. Else if lhsKind is varBinding, then
     30              1. Assert: lhs is a ForBinding.
     31              2. Let status be the result of performing BindingInitialization
     32                 for lhs passing nextValue and undefined as the arguments.
     33          [...]
     34 
     35    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     36 
     37    BindingRestElement : ... BindingPattern
     38 
     39    1. Let A be ArrayCreate(0).
     40    [...]
     41    3. Repeat
     42       [...]
     43       b. If iteratorRecord.[[done]] is true, then
     44          i. Return the result of performing BindingInitialization of
     45             BindingPattern with A and environment as the arguments.
     46       [...]
     47 
     48    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     49 
     50    SingleNameBinding : BindingIdentifier Initializeropt
     51 
     52    [...]
     53    4. If iteratorRecord.[[done]] is false, then
     54       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     55       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     56       c. ReturnIfAbrupt(next).
     57       d. If next is false, set iteratorRecord.[[done]] to true.
     58       e. Else,
     59          [...]
     60          i. Let v be IteratorValue(next).
     61          ii. If v is an abrupt completion, set
     62              iteratorRecord.[[done]] to true.
     63          iii. ReturnIfAbrupt(v).
     64    5. If iteratorRecord.[[done]] is true, let v be undefined.
     65    [...]
     66    8. Return InitializeReferencedBinding(lhs, v).
     67 ---*/
     68 
     69 var iterCount = 0;
     70 
     71 for (var [...[x, y, z]] of [[3, 4, 5]]) {
     72  assert.sameValue(x, 3);
     73  assert.sameValue(y, 4);
     74  assert.sameValue(z, 5);
     75 
     76  iterCount += 1;
     77 }
     78 
     79 assert.sameValue(iterCount, 1, 'Iteration occurred as expected');
     80 
     81 reportCompare(0, 0);