tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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meth-dflt-ary-ptrn-elision.js (2412B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-elision.case
      3 // - src/dstr-binding/default/meth-dflt.template
      4 /*---
      5 description: Elision advances iterator (method (default parameter))
      6 esid: sec-runtime-semantics-definemethod
      7 features: [generators, destructuring-binding, default-parameters]
      8 flags: [generated]
      9 info: |
     10    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
     11 
     12    [...]
     13    6. Let closure be FunctionCreate(kind, StrictFormalParameters,
     14       FunctionBody, scope, strict). If functionPrototype was passed as a
     15       parameter then pass its value as the functionPrototype optional argument
     16       of FunctionCreate.
     17    [...]
     18 
     19    9.2.1 [[Call]] ( thisArgument, argumentsList)
     20 
     21    [...]
     22    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     23    [...]
     24 
     25    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     26 
     27    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     28    [...]
     29 
     30    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     31 
     32    [...]
     33    23. Let iteratorRecord be Record {[[iterator]]:
     34        CreateListIterator(argumentsList), [[done]]: false}.
     35    24. If hasDuplicates is true, then
     36        [...]
     37    25. Else,
     38        b. Let formalStatus be IteratorBindingInitialization for formals with
     39           iteratorRecord and env as arguments.
     40    [...]
     41 
     42    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     43 
     44    ArrayBindingPattern : [ Elision ]
     45 
     46    1. Return the result of performing
     47       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
     48       as the argument.
     49 
     50    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
     51 
     52    Elision : ,
     53 
     54    1. If iteratorRecord.[[done]] is false, then
     55       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     56       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     57       c. ReturnIfAbrupt(next).
     58       d. If next is false, set iteratorRecord.[[done]] to true.
     59    2. Return NormalCompletion(empty).
     60 
     61 ---*/
     62 var first = 0;
     63 var second = 0;
     64 function* g() {
     65  first += 1;
     66  yield;
     67  second += 1;
     68 };
     69 
     70 var callCount = 0;
     71 var obj = {
     72  method([,] = g()) {
     73    assert.sameValue(first, 1);
     74    assert.sameValue(second, 0);
     75    callCount = callCount + 1;
     76  }
     77 };
     78 
     79 obj.method();
     80 assert.sameValue(callCount, 1, 'method invoked exactly once');
     81 
     82 reportCompare(0, 0);