tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

async-func-dstr-var-async-ary-ptrn-rest-ary-elem.js (2885B)

      1 // |reftest| async
      2 // This file was procedurally generated from the following sources:
      3 // - src/dstr-binding-for-await/ary-ptrn-rest-ary-elem.case
      4 // - src/dstr-binding-for-await/default/for-await-of-async-func-var-async.template
      5 /*---
      6 description: Rest element containing an array BindingElementList pattern (for-await-of statement)
      7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
      8 features: [destructuring-binding, async-iteration]
      9 flags: [generated, async]
     10 info: |
     11    IterationStatement :
     12        for await ( ForDeclaration of AssignmentExpression ) Statement
     13 
     14    [...]
     15    2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
     16        lexicalBinding, labelSet, async).
     17 
     18    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
     19 
     20    [...]
     21    4. Let destructuring be IsDestructuring of lhs.
     22    [...]
     23    6. Repeat
     24       [...]
     25       j. If destructuring is false, then
     26          [...]
     27       k. Else
     28          i. If lhsKind is assignment, then
     29             [...]
     30          ii. Else if lhsKind is varBinding, then
     31              [...]
     32          iii. Else,
     33               1. Assert: lhsKind is lexicalBinding.
     34               2. Assert: lhs is a ForDeclaration.
     35               3. Let status be the result of performing BindingInitialization
     36                  for lhs passing nextValue and iterationEnv as arguments.
     37          [...]
     38 
     39    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     40 
     41    BindingRestElement : ... BindingPattern
     42 
     43    1. Let A be ArrayCreate(0).
     44    [...]
     45    3. Repeat
     46       [...]
     47       b. If iteratorRecord.[[done]] is true, then
     48          i. Return the result of performing BindingInitialization of
     49             BindingPattern with A and environment as the arguments.
     50       [...]
     51 
     52    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     53 
     54    SingleNameBinding : BindingIdentifier Initializer_opt
     55 
     56    [...]
     57    3. If iteratorRecord.[[done]] is false, then
     58       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     59       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     60       c. ReturnIfAbrupt(next).
     61       d. If next is false, set iteratorRecord.[[done]] to true.
     62       e. Else,
     63          i. Let v be IteratorValue(next).
     64          ii. If v is an abrupt completion, set
     65              iteratorRecord.[[done]] to true.
     66          iii. ReturnIfAbrupt(v).
     67    4. If iteratorRecord.[[done]] is true, let v be undefined.
     68    [...]
     69    7. Return InitializeReferencedBinding(lhs, v).
     70 ---*/
     71 
     72 var iterCount = 0;
     73 var asyncIter = (async function*() {
     74  yield* [[3, 4, 5]];
     75 })();
     76 
     77 async function fn() {
     78  for await (var [...[x, y, z]] of asyncIter) {
     79    assert.sameValue(x, 3);
     80    assert.sameValue(y, 4);
     81    assert.sameValue(z, 5);
     82 
     83    iterCount += 1;
     84  }
     85 }
     86 
     87 fn()
     88  .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE)
     89  .then($DONE, $DONE);