tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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meth-dflt-ary-init-iter-no-close.js (2126B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-init-iter-no-close.case
      3 // - src/dstr-binding/default/meth-dflt.template
      4 /*---
      5 description: Iterator is not closed when exhausted by pattern evaluation (method (default parameter))
      6 esid: sec-runtime-semantics-definemethod
      7 features: [Symbol.iterator, destructuring-binding, default-parameters]
      8 flags: [generated]
      9 info: |
     10    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
     11 
     12    [...]
     13    6. Let closure be FunctionCreate(kind, StrictFormalParameters,
     14       FunctionBody, scope, strict). If functionPrototype was passed as a
     15       parameter then pass its value as the functionPrototype optional argument
     16       of FunctionCreate.
     17    [...]
     18 
     19    9.2.1 [[Call]] ( thisArgument, argumentsList)
     20 
     21    [...]
     22    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     23    [...]
     24 
     25    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     26 
     27    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     28    [...]
     29 
     30    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     31 
     32    [...]
     33    23. Let iteratorRecord be Record {[[iterator]]:
     34        CreateListIterator(argumentsList), [[done]]: false}.
     35    24. If hasDuplicates is true, then
     36        [...]
     37    25. Else,
     38        b. Let formalStatus be IteratorBindingInitialization for formals with
     39           iteratorRecord and env as arguments.
     40    [...]
     41 
     42    13.3.3.5 Runtime Semantics: BindingInitialization
     43 
     44    BindingPattern : ArrayBindingPattern
     45 
     46    [...]
     47    4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator,
     48       result).
     49    [...]
     50 
     51 ---*/
     52 var doneCallCount = 0;
     53 var iter = {};
     54 iter[Symbol.iterator] = function() {
     55  return {
     56    next: function() {
     57      return { value: null, done: true };
     58    },
     59    return: function() {
     60      doneCallCount += 1;
     61      return {};
     62    }
     63  };
     64 };
     65 
     66 var callCount = 0;
     67 var obj = {
     68  method([x] = iter) {
     69    assert.sameValue(doneCallCount, 0);
     70    callCount = callCount + 1;
     71  }
     72 };
     73 
     74 obj.method();
     75 assert.sameValue(callCount, 1, 'method invoked exactly once');
     76 
     77 reportCompare(0, 0);