tor-browser

The Tor Browser
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meth-dflt-ary-ptrn-rest-ary-elision.js (2816B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-rest-ary-elision.case
      3 // - src/dstr-binding/default/meth-dflt.template
      4 /*---
      5 description: Rest element containing an elision (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    BindingRestElement : ... BindingPattern
     45 
     46    1. Let A be ArrayCreate(0).
     47    [...]
     48    3. Repeat
     49       [...]
     50       b. If iteratorRecord.[[done]] is true, then
     51          i. Return the result of performing BindingInitialization of
     52             BindingPattern with A and environment as the arguments.
     53       [...]
     54 
     55    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     56 
     57    ArrayBindingPattern : [ Elision ]
     58 
     59    1. Return the result of performing
     60       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
     61       as the argument.
     62 
     63    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
     64 
     65    Elision : ,
     66 
     67    1. If iteratorRecord.[[done]] is false, then
     68       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     69       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     70       c. ReturnIfAbrupt(next).
     71       d. If next is false, set iteratorRecord.[[done]] to true.
     72    2. Return NormalCompletion(empty).
     73 
     74 ---*/
     75 var first = 0;
     76 var second = 0;
     77 function* g() {
     78  first += 1;
     79  yield;
     80  second += 1;
     81 };
     82 
     83 var callCount = 0;
     84 var obj = {
     85  method([...[,]] = g()) {
     86    assert.sameValue(first, 1);
     87    assert.sameValue(second, 1);
     88    callCount = callCount + 1;
     89  }
     90 };
     91 
     92 obj.method();
     93 assert.sameValue(callCount, 1, 'method invoked exactly once');
     94 
     95 reportCompare(0, 0);