tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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dflt-params-arg-val-not-undefined.js (3623B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/function-forms/dflt-params-arg-val-not-undefined.case
      3 // - src/function-forms/default/cls-decl-meth.template
      4 /*---
      5 description: Use of initializer when argument value is not `undefined` (class expression method)
      6 esid: sec-runtime-semantics-bindingclassdeclarationevaluation
      7 features: [default-parameters]
      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    14.1.19 Runtime Semantics: IteratorBindingInitialization
     60 
     61    FormalsList : FormalsList , FormalParameter
     62 
     63    [...]
     64    23. Let iteratorRecord be Record {[[Iterator]]:
     65        CreateListIterator(argumentsList), [[Done]]: false}.
     66    24. If hasDuplicates is true, then
     67        [...]
     68    25. Else,
     69        a. Perform ? IteratorBindingInitialization for formals with
     70           iteratorRecord and env as arguments.
     71    [...]
     72 
     73 ---*/
     74 var obj = {};
     75 var falseCount = 0;
     76 var stringCount = 0;
     77 var nanCount = 0;
     78 var zeroCount = 0;
     79 var nullCount = 0;
     80 var objCount = 0;
     81 
     82 var callCount = 0;
     83 class C {
     84  method(aFalse = falseCount +=1, aString = stringCount += 1, aNaN = nanCount += 1, a0 = zeroCount += 1, aNull = nullCount += 1, aObj = objCount +=1) {
     85    assert.sameValue(aFalse, false);
     86    assert.sameValue(aString, '');
     87    assert.sameValue(aNaN, NaN);
     88    assert.sameValue(a0, 0);
     89    assert.sameValue(aNull, null);
     90    assert.sameValue(aObj, obj);
     91    callCount = callCount + 1;
     92  }
     93 }
     94 
     95 C.prototype.method(false, '', NaN, 0, null, obj);
     96 
     97 // Stores a reference `ref` for case evaluation
     98 var ref = C.prototype.method;
     99 
    100 assert.sameValue(callCount, 1, 'method invoked exactly once');
    101 
    102 assert.sameValue(falseCount, 0, 'initializer not evaluated: false');
    103 assert.sameValue(stringCount, 0, 'initializer not evaluated: string');
    104 assert.sameValue(nanCount, 0, 'initializer not evaluated: NaN');
    105 assert.sameValue(zeroCount, 0, 'initializer not evaluated: 0');
    106 assert.sameValue(nullCount, 0, 'initializer not evaluated: null');
    107 assert.sameValue(objCount, 0, 'initializer not evaluated: object');
    108 
    109 reportCompare(0, 0);