tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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meth-ary-ptrn-elem-ary-elision-init.js (2242B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-elem-ary-elision-init.case
      3 // - src/dstr-binding/default/meth.template
      4 /*---
      5 description: BindingElement with array binding pattern and initializer is used (method)
      6 esid: sec-runtime-semantics-definemethod
      7 features: [generators, destructuring-binding]
      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    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     43 
     44    BindingElement : BindingPatternInitializer opt
     45 
     46    [...]
     47    2. If iteratorRecord.[[done]] is true, let v be undefined.
     48    3. If Initializer is present and v is undefined, then
     49       a. Let defaultValue be the result of evaluating Initializer.
     50       b. Let v be ? GetValue(defaultValue).
     51    4. Return the result of performing BindingInitialization of BindingPattern
     52       with v and environment as the arguments.
     53 
     54 ---*/
     55 var first = 0;
     56 var second = 0;
     57 function* g() {
     58  first += 1;
     59  yield;
     60  second += 1;
     61 };
     62 
     63 var callCount = 0;
     64 var obj = {
     65  method([[,] = g()]) {
     66    assert.sameValue(first, 1);
     67    assert.sameValue(second, 0);
     68    callCount = callCount + 1;
     69  }
     70 };
     71 
     72 obj.method([]);
     73 assert.sameValue(callCount, 1, 'method invoked exactly once');
     74 
     75 reportCompare(0, 0);