tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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array-elision-iter-nrml-close-skip.js (1783B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-assignment/array-elision-iter-nrml-close-skip.case
      3 // - src/dstr-assignment/default/for-of.template
      4 /*---
      5 description: IteratorClose is not called when iteration has exhausted the iterator (For..of statement)
      6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
      7 features: [Symbol.iterator, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    IterationStatement :
     11      for ( LeftHandSideExpression of AssignmentExpression ) Statement
     12 
     13    1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
     14       AssignmentExpression, iterate).
     15    2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
     16       keyResult, assignment, labelSet).
     17 
     18    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
     19 
     20    [...]
     21    4. If destructuring is true and if lhsKind is assignment, then
     22       a. Assert: lhs is a LeftHandSideExpression.
     23       b. Let assignmentPattern be the parse of the source text corresponding to
     24          lhs using AssignmentPattern as the goal symbol.
     25    [...]
     26 
     27    ArrayAssignmentPattern : [ Elision ]
     28 
     29    1. Let iterator be GetIterator(value).
     30    [...]
     31    5. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
     32       result).
     33    [...]
     34 
     35 ---*/
     36 var nextCount = 0;
     37 var returnCount = 0;
     38 var iterable = {};
     39 var iterator = {
     40  next: function() {
     41    nextCount += 1;
     42    return { done: true };
     43  },
     44  return: function() {
     45    returnCount += 1;
     46    return {};
     47  }
     48 };
     49 iterable[Symbol.iterator] = function() {
     50  return iterator;
     51 };
     52 
     53 var counter = 0;
     54 
     55 for ([ , ] of [iterable]) {
     56  assert.sameValue(nextCount, 1);
     57  assert.sameValue(returnCount, 0);
     58  counter += 1;
     59 }
     60 
     61 assert.sameValue(counter, 1);
     62 
     63 reportCompare(0, 0);