tor-browser

The Tor Browser
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dflt-ary-ptrn-rest-ary-elem.js (2693B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-rest-ary-elem.case
      3 // - src/dstr-binding/default/arrow-function-dflt.template
      4 /*---
      5 description: Rest element containing an array BindingElementList pattern (arrow function expression (default parameter))
      6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation
      7 features: [destructuring-binding, 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    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     40 
     41    BindingRestElement : ... BindingPattern
     42 
     43    1. Let A be ArrayCreate(0).
     44    [...]
     45    3. Repeat
     46       [...]
     47       b. If iteratorRecord.[[done]] is true, then
     48          i. Return the result of performing BindingInitialization of
     49             BindingPattern with A and environment as the arguments.
     50       [...]
     51 
     52    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     53 
     54    SingleNameBinding : BindingIdentifier Initializeropt
     55 
     56    [...]
     57    4. If iteratorRecord.[[done]] is false, then
     58       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     59       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     60       c. ReturnIfAbrupt(next).
     61       d. If next is false, set iteratorRecord.[[done]] to true.
     62       e. Else,
     63          [...]
     64          i. Let v be IteratorValue(next).
     65          ii. If v is an abrupt completion, set
     66              iteratorRecord.[[done]] to true.
     67          iii. ReturnIfAbrupt(v).
     68    5. If iteratorRecord.[[done]] is true, let v be undefined.
     69    [...]
     70    8. Return InitializeReferencedBinding(lhs, v).
     71 ---*/
     72 
     73 var callCount = 0;
     74 var f;
     75 f = ([...[x, y, z]] = [3, 4, 5]) => {
     76  assert.sameValue(x, 3);
     77  assert.sameValue(y, 4);
     78  assert.sameValue(z, 5);
     79  callCount = callCount + 1;
     80 };
     81 
     82 f();
     83 assert.sameValue(callCount, 1, 'arrow function invoked exactly once');
     84 
     85 reportCompare(0, 0);