tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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meth-dflt-params-arg-val-undefined.js (2239B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/function-forms/dflt-params-arg-val-undefined.case
      3 // - src/function-forms/default/meth.template
      4 /*---
      5 description: Use of initializer when argument value is `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 
     58 var callCount = 0;
     59 var obj = {
     60  method(fromLiteral = 23, fromExpr = 45, fromHole = 99) {
     61    assert.sameValue(fromLiteral, 23);
     62    assert.sameValue(fromExpr, 45);
     63    assert.sameValue(fromHole, 99);
     64    callCount = callCount + 1;
     65  }
     66 };
     67 
     68 obj.method(undefined, void 0);
     69 
     70 // Stores a reference `ref` for case evaluation
     71 var ref = obj.method;
     72 
     73 assert.sameValue(callCount, 1, 'method invoked exactly once');
     74 
     75 reportCompare(0, 0);