tor-browser

The Tor Browser
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dflt-params-duplicates.js (2767B)

      1 // |reftest| error:SyntaxError
      2 // This file was procedurally generated from the following sources:
      3 // - src/function-forms/dflt-params-duplicates.case
      4 // - src/function-forms/syntax/cls-decl-gen-meth.template
      5 /*---
      6 description: It is a Syntax Error if BoundNames of FormalParameters contains any duplicate elements. (class expression method)
      7 esid: sec-class-definitions-runtime-semantics-evaluation
      8 features: [default-parameters, generators]
      9 flags: [generated]
     10 negative:
     11  phase: parse
     12  type: SyntaxError
     13 info: |
     14    ClassDeclaration : class BindingIdentifier ClassTail
     15 
     16    1. Let className be StringValue of BindingIdentifier.
     17    2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
     18       argument className.
     19    [...]
     20 
     21    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
     22 
     23    21. For each ClassElement m in order from methods
     24        a. If IsStatic of m is false, then
     25           i. Let status be the result of performing
     26              PropertyDefinitionEvaluation for m with arguments proto and
     27              false.
     28        [...]
     29 
     30    14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
     31 
     32    GeneratorMethod : * PropertyName ( StrictFormalParameters ) { GeneratorBody }
     33 
     34    1. Let propKey be the result of evaluating PropertyName.
     35    2. ReturnIfAbrupt(propKey).
     36    3. If the function code for this GeneratorMethod is strict mode code,
     37       let strict be true. Otherwise let strict be false.
     38    4. Let scope be the running execution context's LexicalEnvironment.
     39    5. Let closure be GeneratorFunctionCreate(Method,
     40       StrictFormalParameters, GeneratorBody, scope, strict).
     41 
     42    9.2.1 [[Call]] ( thisArgument, argumentsList)
     43 
     44    [...]
     45    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     46    [...]
     47 
     48    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     49 
     50    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     51    [...]
     52 
     53    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     54 
     55    [...]
     56    23. Let iteratorRecord be Record {[[iterator]]:
     57        CreateListIterator(argumentsList), [[done]]: false}.
     58    24. If hasDuplicates is true, then
     59        [...]
     60    25. Else,
     61        b. Let formalStatus be IteratorBindingInitialization for formals with
     62           iteratorRecord and env as arguments.
     63    [...]
     64 
     65 
     66    14.1.2 Static Semantics: Early Errors
     67 
     68    StrictFormalParameters : FormalParameters
     69 
     70    - It is a Syntax Error if BoundNames of FormalParameters contains any
     71      duplicate elements.
     72 
     73    FormalParameters : FormalParameterList
     74 
     75    - It is a Syntax Error if IsSimpleParameterList of FormalParameterList is
     76      false and BoundNames of FormalParameterList contains any duplicate
     77      elements.
     78 
     79 ---*/
     80 $DONOTEVALUATE();
     81 
     82 class C {
     83  *method(x = 0, x) {
     84    
     85  }
     86 }