tor-browser

The Tor Browser
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gen-meth-ary-ptrn-rest-id-exhausted.js (2373B)

      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/gen-meth.template
      4 /*---
      5 description: RestElement applied to an exhausted iterator (generator method)
      6 esid: sec-generator-function-definitions-runtime-semantics-propertydefinitionevaluation
      7 features: [Symbol.iterator, generators, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    GeneratorMethod :
     11        * PropertyName ( StrictFormalParameters ) { GeneratorBody }
     12 
     13    1. Let propKey be the result of evaluating PropertyName.
     14    2. ReturnIfAbrupt(propKey).
     15    3. If the function code for this GeneratorMethod is strict mode code,
     16       let strict be true. Otherwise let strict be false.
     17    4. Let scope be the running execution context's LexicalEnvironment.
     18    5. Let closure be GeneratorFunctionCreate(Method,
     19       StrictFormalParameters, GeneratorBody, scope, strict).
     20    [...]
     21 
     22    9.2.1 [[Call]] ( thisArgument, argumentsList)
     23 
     24    [...]
     25    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     26    [...]
     27 
     28    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     29 
     30    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     31    [...]
     32 
     33    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     34 
     35    [...]
     36    23. Let iteratorRecord be Record {[[iterator]]:
     37        CreateListIterator(argumentsList), [[done]]: false}.
     38    24. If hasDuplicates is true, then
     39        [...]
     40    25. Else,
     41        b. Let formalStatus be IteratorBindingInitialization for formals with
     42           iteratorRecord and env as arguments.
     43    [...]
     44 
     45    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     46    BindingRestElement : ... BindingIdentifier
     47    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
     48       environment).
     49    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
     50       [...]
     51       b. If iteratorRecord.[[done]] is true, then
     52          i. If environment is undefined, return PutValue(lhs, A).
     53          ii. Return InitializeReferencedBinding(lhs, A).
     54 
     55 ---*/
     56 
     57 var callCount = 0;
     58 var obj = {
     59  *method([, , ...x]) {
     60    assert(Array.isArray(x));
     61    assert.sameValue(x.length, 0);
     62    callCount = callCount + 1;
     63  }
     64 };
     65 
     66 obj.method([1, 2]).next();
     67 assert.sameValue(callCount, 1, 'generator method invoked exactly once');
     68 
     69 reportCompare(0, 0);