tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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meth-dflt-params-arg-val-not-undefined.js (2976B)

      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/meth.template
      4 /*---
      5 description: Use of initializer when argument value is not `undefined` (method)
      6 esid: sec-runtime-semantics-definemethod
      7 features: [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    14.1.19 Runtime Semantics: IteratorBindingInitialization
     43 
     44    FormalsList : FormalsList , FormalParameter
     45 
     46    [...]
     47    23. Let iteratorRecord be Record {[[Iterator]]:
     48        CreateListIterator(argumentsList), [[Done]]: false}.
     49    24. If hasDuplicates is true, then
     50        [...]
     51    25. Else,
     52        a. Perform ? IteratorBindingInitialization for formals with
     53           iteratorRecord and env as arguments.
     54    [...]
     55 
     56 ---*/
     57 var obj = {};
     58 var falseCount = 0;
     59 var stringCount = 0;
     60 var nanCount = 0;
     61 var zeroCount = 0;
     62 var nullCount = 0;
     63 var objCount = 0;
     64 
     65 var callCount = 0;
     66 var obj = {
     67  method(aFalse = falseCount +=1, aString = stringCount += 1, aNaN = nanCount += 1, a0 = zeroCount += 1, aNull = nullCount += 1, aObj = objCount +=1) {
     68    assert.sameValue(aFalse, false);
     69    assert.sameValue(aString, '');
     70    assert.sameValue(aNaN, NaN);
     71    assert.sameValue(a0, 0);
     72    assert.sameValue(aNull, null);
     73    assert.sameValue(aObj, obj);
     74    callCount = callCount + 1;
     75  }
     76 };
     77 
     78 obj.method(false, '', NaN, 0, null, obj);
     79 
     80 // Stores a reference `ref` for case evaluation
     81 var ref = obj.method;
     82 
     83 assert.sameValue(callCount, 1, 'method invoked exactly once');
     84 
     85 assert.sameValue(falseCount, 0, 'initializer not evaluated: false');
     86 assert.sameValue(stringCount, 0, 'initializer not evaluated: string');
     87 assert.sameValue(nanCount, 0, 'initializer not evaluated: NaN');
     88 assert.sameValue(zeroCount, 0, 'initializer not evaluated: 0');
     89 assert.sameValue(nullCount, 0, 'initializer not evaluated: null');
     90 assert.sameValue(objCount, 0, 'initializer not evaluated: object');
     91 
     92 reportCompare(0, 0);