tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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let-ary-ptrn-elem-ary-empty-init.js (2192B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-elem-ary-empty-init.case
      3 // - src/dstr-binding/default/for-let.template
      4 /*---
      5 description: BindingElement with array binding pattern and initializer is used (for statement)
      6 esid: sec-for-statement-runtime-semantics-labelledevaluation
      7 features: [generators, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    IterationStatement :
     11        for ( LexicalDeclaration Expressionopt ; Expressionopt ) Statement
     12 
     13    [...]
     14    7. Let forDcl be the result of evaluating LexicalDeclaration.
     15    [...]
     16 
     17    LexicalDeclaration : LetOrConst BindingList ;
     18 
     19    1. Let next be the result of evaluating BindingList.
     20    2. ReturnIfAbrupt(next).
     21    3. Return NormalCompletion(empty).
     22 
     23    BindingList : BindingList , LexicalBinding
     24 
     25    1. Let next be the result of evaluating BindingList.
     26    2. ReturnIfAbrupt(next).
     27    3. Return the result of evaluating LexicalBinding.
     28 
     29    LexicalBinding : BindingPattern Initializer
     30 
     31    1. Let rhs be the result of evaluating Initializer.
     32    2. Let value be GetValue(rhs).
     33    3. ReturnIfAbrupt(value).
     34    4. Let env be the running execution context’s LexicalEnvironment.
     35    5. Return the result of performing BindingInitialization for BindingPattern
     36       using value and env as the arguments.
     37 
     38    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     39 
     40    BindingElement : BindingPatternInitializer opt
     41 
     42    [...]
     43    2. If iteratorRecord.[[done]] is true, let v be undefined.
     44    3. If Initializer is present and v is undefined, then
     45       a. Let defaultValue be the result of evaluating Initializer.
     46       b. Let v be ? GetValue(defaultValue).
     47    4. Return the result of performing BindingInitialization of BindingPattern
     48       with v and environment as the arguments.
     49 
     50 ---*/
     51 var initCount = 0;
     52 var iterCount = 0;
     53 var iter = function*() { iterCount += 1; }();
     54 
     55 var iterCount = 0;
     56 
     57 for (let [[] = function() { initCount += 1; return iter; }()] = []; iterCount < 1; ) {
     58  assert.sameValue(initCount, 1);
     59  assert.sameValue(iterCount, 0);
     60 
     61  iterCount += 1;
     62 }
     63 
     64 assert.sameValue(iterCount, 1, 'Iteration occurred as expected');
     65 
     66 reportCompare(0, 0);