tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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dflt-ary-ptrn-rest-id-exhausted.js (2010B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-rest-id-exhausted.case
      3 // - src/dstr-binding/default/arrow-function-dflt.template
      4 /*---
      5 description: RestElement applied to an exhausted iterator (arrow function expression (default parameter))
      6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation
      7 features: [Symbol.iterator, 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    BindingRestElement : ... BindingIdentifier
     41    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
     42       environment).
     43    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
     44       [...]
     45       b. If iteratorRecord.[[done]] is true, then
     46          i. If environment is undefined, return PutValue(lhs, A).
     47          ii. Return InitializeReferencedBinding(lhs, A).
     48 
     49 ---*/
     50 
     51 var callCount = 0;
     52 var f;
     53 f = ([, , ...x] = [1, 2]) => {
     54  assert(Array.isArray(x));
     55  assert.sameValue(x.length, 0);
     56  callCount = callCount + 1;
     57 };
     58 
     59 f();
     60 assert.sameValue(callCount, 1, 'arrow function invoked exactly once');
     61 
     62 reportCompare(0, 0);