tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

dflt-params-arg-val-undefined.js (2065B)

      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/arrow-function.template
      4 /*---
      5 description: Use of initializer when argument value is `undefined` (arrow function expression)
      6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation
      7 features: [default-parameters]
      8 flags: [generated]
      9 info: |
     10    ArrowFunction : ArrowParameters => ConciseBody
     11 
     12    [...]
     13    4. Let closure be FunctionCreate(Arrow, parameters, ConciseBody, scope, strict).
     14    [...]
     15 
     16    9.2.1 [[Call]] ( thisArgument, argumentsList)
     17 
     18    [...]
     19    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     20    [...]
     21 
     22    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     23 
     24    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     25    [...]
     26 
     27    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     28 
     29    [...]
     30    23. Let iteratorRecord be Record {[[iterator]]:
     31        CreateListIterator(argumentsList), [[done]]: false}.
     32    24. If hasDuplicates is true, then
     33        [...]
     34    25. Else,
     35        b. Let formalStatus be IteratorBindingInitialization for formals with
     36           iteratorRecord and env as arguments.
     37    [...]
     38 
     39    14.1.19 Runtime Semantics: IteratorBindingInitialization
     40 
     41    FormalsList : FormalsList , FormalParameter
     42 
     43    [...]
     44    23. Let iteratorRecord be Record {[[Iterator]]:
     45        CreateListIterator(argumentsList), [[Done]]: false}.
     46    24. If hasDuplicates is true, then
     47        [...]
     48    25. Else,
     49        a. Perform ? IteratorBindingInitialization for formals with
     50           iteratorRecord and env as arguments.
     51    [...]
     52 
     53 ---*/
     54 
     55 var callCount = 0;
     56 // Stores a reference `ref` for case evaluation
     57 var ref;
     58 ref = (fromLiteral = 23, fromExpr = 45, fromHole = 99) => {
     59  assert.sameValue(fromLiteral, 23);
     60  assert.sameValue(fromExpr, 45);
     61  assert.sameValue(fromHole, 99);
     62  callCount = callCount + 1;
     63 };
     64 
     65 ref(undefined, void 0);
     66 assert.sameValue(callCount, 1, 'arrow function invoked exactly once');
     67 
     68 reportCompare(0, 0);