tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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var-ary-ptrn-elision.js (2124B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-elision.case
      3 // - src/dstr-binding/default/for-var.template
      4 /*---
      5 description: Elision advances iterator (for statement)
      6 esid: sec-for-statement-runtime-semantics-labelledevaluation
      7 features: [generators, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    IterationStatement :
     11        for ( var VariableDeclarationList ; Expressionopt ; Expressionopt ) Statement
     12 
     13    1. Let varDcl be the result of evaluating VariableDeclarationList.
     14    [...]
     15 
     16    13.3.2.4 Runtime Semantics: Evaluation
     17 
     18    VariableDeclarationList : VariableDeclarationList , VariableDeclaration
     19 
     20    1. Let next be the result of evaluating VariableDeclarationList.
     21    2. ReturnIfAbrupt(next).
     22    3. Return the result of evaluating VariableDeclaration.
     23 
     24    VariableDeclaration : BindingPattern Initializer
     25 
     26    1. Let rhs be the result of evaluating Initializer.
     27    2. Let rval be GetValue(rhs).
     28    3. ReturnIfAbrupt(rval).
     29    4. Return the result of performing BindingInitialization for BindingPattern
     30       passing rval and undefined as arguments.
     31 
     32    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     33 
     34    ArrayBindingPattern : [ Elision ]
     35 
     36    1. Return the result of performing
     37       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
     38       as the argument.
     39 
     40    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
     41 
     42    Elision : ,
     43 
     44    1. If iteratorRecord.[[done]] is false, then
     45       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     46       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     47       c. ReturnIfAbrupt(next).
     48       d. If next is false, set iteratorRecord.[[done]] to true.
     49    2. Return NormalCompletion(empty).
     50 
     51 ---*/
     52 var first = 0;
     53 var second = 0;
     54 function* g() {
     55  first += 1;
     56  yield;
     57  second += 1;
     58 };
     59 
     60 var iterCount = 0;
     61 
     62 for (var [,] = g(); iterCount < 1; ) {
     63  assert.sameValue(first, 1);
     64  assert.sameValue(second, 0);
     65  iterCount += 1;
     66 }
     67 
     68 assert.sameValue(iterCount, 1, 'Iteration occurred as expected');
     69 
     70 reportCompare(0, 0);