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 (2856B)

      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/func-decl.template
      4 /*---
      5 description: Use of initializer when argument value is not `undefined` (function declaration)
      6 esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject
      7 features: [default-parameters]
      8 flags: [generated]
      9 info: |
     10    FunctionDeclaration :
     11        function BindingIdentifier ( FormalParameters ) { FunctionBody }
     12 
     13        [...]
     14        3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody,
     15           scope, strict).
     16        [...]
     17 
     18    9.2.1 [[Call]] ( thisArgument, argumentsList)
     19 
     20    [...]
     21    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     22    [...]
     23 
     24    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     25 
     26    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     27    [...]
     28 
     29    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     30 
     31    [...]
     32    23. Let iteratorRecord be Record {[[iterator]]:
     33        CreateListIterator(argumentsList), [[done]]: false}.
     34    24. If hasDuplicates is true, then
     35        [...]
     36    25. Else,
     37        b. Let formalStatus be IteratorBindingInitialization for formals with
     38           iteratorRecord and env as arguments.
     39    [...]
     40 
     41    14.1.19 Runtime Semantics: IteratorBindingInitialization
     42 
     43    FormalsList : FormalsList , FormalParameter
     44 
     45    [...]
     46    23. Let iteratorRecord be Record {[[Iterator]]:
     47        CreateListIterator(argumentsList), [[Done]]: false}.
     48    24. If hasDuplicates is true, then
     49        [...]
     50    25. Else,
     51        a. Perform ? IteratorBindingInitialization for formals with
     52           iteratorRecord and env as arguments.
     53    [...]
     54 
     55 ---*/
     56 var obj = {};
     57 var falseCount = 0;
     58 var stringCount = 0;
     59 var nanCount = 0;
     60 var zeroCount = 0;
     61 var nullCount = 0;
     62 var objCount = 0;
     63 
     64 var callCount = 0;
     65 // Stores a reference `ref` for case evaluation
     66 function ref(aFalse = falseCount +=1, aString = stringCount += 1, aNaN = nanCount += 1, a0 = zeroCount += 1, aNull = nullCount += 1, aObj = objCount +=1) {
     67  assert.sameValue(aFalse, false);
     68  assert.sameValue(aString, '');
     69  assert.sameValue(aNaN, NaN);
     70  assert.sameValue(a0, 0);
     71  assert.sameValue(aNull, null);
     72  assert.sameValue(aObj, obj);
     73  callCount = callCount + 1;
     74 }
     75 
     76 ref(false, '', NaN, 0, null, obj);
     77 
     78 assert.sameValue(callCount, 1, 'function invoked exactly once');
     79 
     80 assert.sameValue(falseCount, 0, 'initializer not evaluated: false');
     81 assert.sameValue(stringCount, 0, 'initializer not evaluated: string');
     82 assert.sameValue(nanCount, 0, 'initializer not evaluated: NaN');
     83 assert.sameValue(zeroCount, 0, 'initializer not evaluated: 0');
     84 assert.sameValue(nullCount, 0, 'initializer not evaluated: null');
     85 assert.sameValue(objCount, 0, 'initializer not evaluated: object');
     86 
     87 reportCompare(0, 0);