tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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dflt-params-ref-later.js (1965B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/function-forms/dflt-params-ref-later.case
      3 // - src/function-forms/error/func-expr.template
      4 /*---
      5 description: Referencing a parameter that occurs later in the ParameterList (function expression)
      6 esid: sec-function-definitions-runtime-semantics-evaluation
      7 features: [default-parameters]
      8 flags: [generated]
      9 info: |
     10    FunctionExpression : function ( FormalParameters ) { FunctionBody }
     11 
     12        [...]
     13        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
     14           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    14.1.19 Runtime Semantics: IteratorBindingInitialization
     41 
     42    FormalsList : FormalsList , FormalParameter
     43 
     44    1. Let status be the result of performing IteratorBindingInitialization for
     45       FormalsList using iteratorRecord and environment as the arguments.
     46    2. ReturnIfAbrupt(status).
     47    3. Return the result of performing IteratorBindingInitialization for
     48       FormalParameter using iteratorRecord and environment as the arguments.
     49 
     50 ---*/
     51 var x = 0;
     52 
     53 var callCount = 0;
     54 var f;
     55 f = function(x = y, y) {
     56  
     57  callCount = callCount + 1;
     58 };
     59 
     60 assert.throws(ReferenceError, function() {
     61  f();
     62 });
     63 assert.sameValue(callCount, 0, 'function body not evaluated');
     64 
     65 reportCompare(0, 0);