tor-browser

The Tor Browser
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dflt-params-arg-val-not-undefined.js (3815B)

      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-gen-meth.template
      4 /*---
      5 description: Use of initializer when argument value is not `undefined` (class expression method)
      6 esid: sec-class-definitions-runtime-semantics-evaluation
      7 features: [default-parameters, generators]
      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    14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
     27 
     28    GeneratorMethod : * PropertyName ( StrictFormalParameters ) { GeneratorBody }
     29 
     30    1. Let propKey be the result of evaluating PropertyName.
     31    2. ReturnIfAbrupt(propKey).
     32    3. If the function code for this GeneratorMethod is strict mode code,
     33       let strict be true. Otherwise let strict be false.
     34    4. Let scope be the running execution context's LexicalEnvironment.
     35    5. Let closure be GeneratorFunctionCreate(Method,
     36       StrictFormalParameters, GeneratorBody, scope, strict).
     37 
     38    9.2.1 [[Call]] ( thisArgument, argumentsList)
     39 
     40    [...]
     41    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     42    [...]
     43 
     44    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     45 
     46    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     47    [...]
     48 
     49    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     50 
     51    [...]
     52    23. Let iteratorRecord be Record {[[iterator]]:
     53        CreateListIterator(argumentsList), [[done]]: false}.
     54    24. If hasDuplicates is true, then
     55        [...]
     56    25. Else,
     57        b. Let formalStatus be IteratorBindingInitialization for formals with
     58           iteratorRecord and env as arguments.
     59    [...]
     60 
     61 
     62    14.1.19 Runtime Semantics: IteratorBindingInitialization
     63 
     64    FormalsList : FormalsList , FormalParameter
     65 
     66    [...]
     67    23. Let iteratorRecord be Record {[[Iterator]]:
     68        CreateListIterator(argumentsList), [[Done]]: false}.
     69    24. If hasDuplicates is true, then
     70        [...]
     71    25. Else,
     72        a. Perform ? IteratorBindingInitialization for formals with
     73           iteratorRecord and env as arguments.
     74    [...]
     75 
     76 ---*/
     77 var obj = {};
     78 var falseCount = 0;
     79 var stringCount = 0;
     80 var nanCount = 0;
     81 var zeroCount = 0;
     82 var nullCount = 0;
     83 var objCount = 0;
     84 
     85 var callCount = 0;
     86 class C {
     87  *method(aFalse = falseCount +=1, aString = stringCount += 1, aNaN = nanCount += 1, a0 = zeroCount += 1, aNull = nullCount += 1, aObj = objCount +=1) {
     88    assert.sameValue(aFalse, false);
     89    assert.sameValue(aString, '');
     90    assert.sameValue(aNaN, NaN);
     91    assert.sameValue(a0, 0);
     92    assert.sameValue(aNull, null);
     93    assert.sameValue(aObj, obj);
     94    callCount = callCount + 1;
     95  }
     96 }
     97 
     98 C.prototype.method(false, '', NaN, 0, null, obj).next();
     99 
    100 // Stores a reference `ref` for case evaluation
    101 var ref = C.prototype.method;
    102 
    103 assert.sameValue(callCount, 1, 'method invoked exactly once');
    104 
    105 assert.sameValue(falseCount, 0, 'initializer not evaluated: false');
    106 assert.sameValue(stringCount, 0, 'initializer not evaluated: string');
    107 assert.sameValue(nanCount, 0, 'initializer not evaluated: NaN');
    108 assert.sameValue(zeroCount, 0, 'initializer not evaluated: 0');
    109 assert.sameValue(nullCount, 0, 'initializer not evaluated: null');
    110 assert.sameValue(objCount, 0, 'initializer not evaluated: object');
    111 
    112 reportCompare(0, 0);