tor-browser

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

dflt-ary-ptrn-rest-ary-elem.js (2754B)

      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/func-decl-dflt.template
      4 /*---
      5 description: Rest element containing an array BindingElementList pattern (function declaration (default parameter))
      6 esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject
      7 features: [destructuring-binding, default-parameters]
      8 flags: [generated]
      9 info: |
     10    FunctionDeclaration :
     11        function BindingIdentifier ( FormalParameters ) { FunctionBody }
     12 
     13        [...]
     14        3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody,
     15           scope, strict).
     16        [...]
     17 
     18    9.2.1 [[Call]] ( thisArgument, argumentsList)
     19 
     20    [...]
     21    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     22    [...]
     23 
     24    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     25 
     26    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     27    [...]
     28 
     29    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     30 
     31    [...]
     32    23. Let iteratorRecord be Record {[[iterator]]:
     33        CreateListIterator(argumentsList), [[done]]: false}.
     34    24. If hasDuplicates is true, then
     35        [...]
     36    25. Else,
     37        b. Let formalStatus be IteratorBindingInitialization for formals with
     38           iteratorRecord and env as arguments.
     39    [...]
     40 
     41    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     42 
     43    BindingRestElement : ... BindingPattern
     44 
     45    1. Let A be ArrayCreate(0).
     46    [...]
     47    3. Repeat
     48       [...]
     49       b. If iteratorRecord.[[done]] is true, then
     50          i. Return the result of performing BindingInitialization of
     51             BindingPattern with A and environment as the arguments.
     52       [...]
     53 
     54    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     55 
     56    SingleNameBinding : BindingIdentifier Initializeropt
     57 
     58    [...]
     59    4. If iteratorRecord.[[done]] is false, then
     60       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     61       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     62       c. ReturnIfAbrupt(next).
     63       d. If next is false, set iteratorRecord.[[done]] to true.
     64       e. Else,
     65          [...]
     66          i. Let v be IteratorValue(next).
     67          ii. If v is an abrupt completion, set
     68              iteratorRecord.[[done]] to true.
     69          iii. ReturnIfAbrupt(v).
     70    5. If iteratorRecord.[[done]] is true, let v be undefined.
     71    [...]
     72    8. Return InitializeReferencedBinding(lhs, v).
     73 ---*/
     74 
     75 var callCount = 0;
     76 function f([...[x, y, z]] = [3, 4, 5]) {
     77  assert.sameValue(x, 3);
     78  assert.sameValue(y, 4);
     79  assert.sameValue(z, 5);
     80  callCount = callCount + 1;
     81 };
     82 f();
     83 assert.sameValue(callCount, 1, 'function invoked exactly once');
     84 
     85 reportCompare(0, 0);