tor-browser

The Tor Browser
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gen-meth-params-trailing-comma-single.js (2151B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/function-forms/params-trailing-comma-single.case
      3 // - src/function-forms/default/gen-meth.template
      4 /*---
      5 description: A trailing comma should not increase the respective length, using a single parameter (generator method)
      6 esid: sec-generator-function-definitions-runtime-semantics-propertydefinitionevaluation
      7 features: [generators]
      8 flags: [generated]
      9 info: |
     10    GeneratorMethod :
     11        * PropertyName ( StrictFormalParameters ) { GeneratorBody }
     12 
     13    1. Let propKey be the result of evaluating PropertyName.
     14    2. ReturnIfAbrupt(propKey).
     15    3. If the function code for this GeneratorMethod is strict mode code,
     16       let strict be true. Otherwise let strict be false.
     17    4. Let scope be the running execution context's LexicalEnvironment.
     18    5. Let closure be GeneratorFunctionCreate(Method,
     19       StrictFormalParameters, GeneratorBody, scope, strict).
     20    [...]
     21 
     22    9.2.1 [[Call]] ( thisArgument, argumentsList)
     23 
     24    [...]
     25    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     26    [...]
     27 
     28    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     29 
     30    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     31    [...]
     32 
     33    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     34 
     35    [...]
     36    23. Let iteratorRecord be Record {[[iterator]]:
     37        CreateListIterator(argumentsList), [[done]]: false}.
     38    24. If hasDuplicates is true, then
     39        [...]
     40    25. Else,
     41        b. Let formalStatus be IteratorBindingInitialization for formals with
     42           iteratorRecord and env as arguments.
     43    [...]
     44 
     45 
     46    Trailing comma in the parameters list
     47 
     48    14.1 Function Definitions
     49 
     50    FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] ,
     51 ---*/
     52 
     53 var callCount = 0;
     54 var obj = {
     55  *method(a,) {
     56    assert.sameValue(a, 42);
     57    callCount = callCount + 1;
     58  }
     59 };
     60 
     61 obj.method(42, 39).next();
     62 
     63 // Stores a reference `ref` for case evaluation
     64 var ref = obj.method;
     65 
     66 assert.sameValue(callCount, 1, 'generator method invoked exactly once');
     67 
     68 assert.sameValue(ref.length, 1, 'length is properly set');
     69 
     70 reportCompare(0, 0);