tor-browser

The Tor Browser
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meth-ary-ptrn-elem-ary-empty-init.js (2920B)

      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/cls-decl-meth.template
      4 /*---
      5 description: BindingElement with array binding pattern and initializer is used (class expression method)
      6 esid: sec-runtime-semantics-bindingclassdeclarationevaluation
      7 features: [generators, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    ClassDeclaration : class BindingIdentifier ClassTail
     11 
     12    1. Let className be StringValue of BindingIdentifier.
     13    2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
     14       argument className.
     15    [...]
     16 
     17    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
     18 
     19    21. For each ClassElement m in order from methods
     20        a. If IsStatic of m is false, then
     21           i. Let status be the result of performing
     22              PropertyDefinitionEvaluation for m with arguments proto and
     23              false.
     24        [...]
     25 
     26    14.3.8 Runtime Semantics: DefineMethod
     27 
     28    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
     29 
     30    [...]
     31    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
     32       scope, strict). If functionPrototype was passed as a parameter then pass its
     33       value as the functionPrototype optional argument of FunctionCreate.
     34    [...]
     35 
     36    9.2.1 [[Call]] ( thisArgument, argumentsList)
     37 
     38    [...]
     39    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     40    [...]
     41 
     42    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     43 
     44    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     45    [...]
     46 
     47    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     48 
     49    [...]
     50    23. Let iteratorRecord be Record {[[iterator]]:
     51        CreateListIterator(argumentsList), [[done]]: false}.
     52    24. If hasDuplicates is true, then
     53        [...]
     54    25. Else,
     55        b. Let formalStatus be IteratorBindingInitialization for formals with
     56           iteratorRecord and env as arguments.
     57    [...]
     58 
     59    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     60 
     61    BindingElement : BindingPatternInitializer opt
     62 
     63    [...]
     64    2. If iteratorRecord.[[done]] is true, let v be undefined.
     65    3. If Initializer is present and v is undefined, then
     66       a. Let defaultValue be the result of evaluating Initializer.
     67       b. Let v be ? GetValue(defaultValue).
     68    4. Return the result of performing BindingInitialization of BindingPattern
     69       with v and environment as the arguments.
     70 
     71 ---*/
     72 var initCount = 0;
     73 var iterCount = 0;
     74 var iter = function*() { iterCount += 1; }();
     75 
     76 var callCount = 0;
     77 class C {
     78  method([[] = function() { initCount += 1; return iter; }()]) {
     79    assert.sameValue(initCount, 1);
     80    assert.sameValue(iterCount, 0);
     81    callCount = callCount + 1;
     82  }
     83 };
     84 
     85 new C().method([]);
     86 assert.sameValue(callCount, 1, 'method invoked exactly once');
     87 
     88 reportCompare(0, 0);