tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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dflt-params-ref-later.js (2027B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/function-forms/dflt-params-ref-later.case
      3 // - src/function-forms/error/gen-func-expr.template
      4 /*---
      5 description: Referencing a parameter that occurs later in the ParameterList (generator function expression)
      6 esid: sec-generator-function-definitions-runtime-semantics-evaluation
      7 features: [default-parameters, generators]
      8 flags: [generated]
      9 info: |
     10    GeneratorExpression : function * ( FormalParameters ) { GeneratorBody }
     11 
     12        [...]
     13        3. Let closure be GeneratorFunctionCreate(Normal, FormalParameters,
     14           GeneratorBody, scope, strict).
     15        [...]
     16 
     17    9.2.1 [[Call]] ( thisArgument, argumentsList)
     18 
     19    [...]
     20    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     21    [...]
     22 
     23    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     24 
     25    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     26    [...]
     27 
     28    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     29 
     30    [...]
     31    23. Let iteratorRecord be Record {[[iterator]]:
     32        CreateListIterator(argumentsList), [[done]]: false}.
     33    24. If hasDuplicates is true, then
     34        [...]
     35    25. Else,
     36        b. Let formalStatus be IteratorBindingInitialization for formals with
     37           iteratorRecord and env as arguments.
     38    [...]
     39 
     40 
     41    14.1.19 Runtime Semantics: IteratorBindingInitialization
     42 
     43    FormalsList : FormalsList , FormalParameter
     44 
     45    1. Let status be the result of performing IteratorBindingInitialization for
     46       FormalsList using iteratorRecord and environment as the arguments.
     47    2. ReturnIfAbrupt(status).
     48    3. Return the result of performing IteratorBindingInitialization for
     49       FormalParameter using iteratorRecord and environment as the arguments.
     50 
     51 ---*/
     52 var x = 0;
     53 
     54 var callCount = 0;
     55 var f;
     56 f = function*(x = y, y) {
     57  
     58  callCount = callCount + 1;
     59 };
     60 
     61 assert.throws(ReferenceError, function() {
     62  f();
     63 });
     64 assert.sameValue(callCount, 0, 'generator function body not evaluated');
     65 
     66 reportCompare(0, 0);