tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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ary-ptrn-rest-ary-elision.js (2614B)

      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/arrow-function.template
      4 /*---
      5 description: Rest element containing an elision (arrow function expression)
      6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation
      7 features: [generators, destructuring-binding]
      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    ArrayBindingPattern : [ Elision ]
     55 
     56    1. Return the result of performing
     57       IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord
     58       as the argument.
     59 
     60    12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
     61 
     62    Elision : ,
     63 
     64    1. If iteratorRecord.[[done]] is false, then
     65       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     66       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     67       c. ReturnIfAbrupt(next).
     68       d. If next is false, set iteratorRecord.[[done]] to true.
     69    2. Return NormalCompletion(empty).
     70 
     71 ---*/
     72 var first = 0;
     73 var second = 0;
     74 function* g() {
     75  first += 1;
     76  yield;
     77  second += 1;
     78 };
     79 
     80 var callCount = 0;
     81 var f;
     82 f = ([...[,]]) => {
     83  assert.sameValue(first, 1);
     84  assert.sameValue(second, 1);
     85  callCount = callCount + 1;
     86 };
     87 
     88 f(g());
     89 assert.sameValue(callCount, 1, 'arrow function invoked exactly once');
     90 
     91 reportCompare(0, 0);