dflt-ary-ptrn-elision-exhausted.js (1945B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elision-exhausted.case 3 // - src/dstr-binding/default/arrow-function-dflt.template 4 /*--- 5 description: Elision accepts exhausted iterator (arrow function expression (default parameter)) 6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation 7 features: [generators, 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 ArrayBindingPattern : [ Elision ] 42 43 1. Return the result of performing 44 IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord 45 as the argument. 46 47 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation 48 49 Elision : , 50 51 1. If iteratorRecord.[[done]] is false, then 52 [...] 53 2. Return NormalCompletion(empty). 54 55 ---*/ 56 var iter = function*() {}(); 57 iter.next(); 58 59 var callCount = 0; 60 var f; 61 f = ([,] = iter) => { 62 63 callCount = callCount + 1; 64 }; 65 66 f(); 67 assert.sameValue(callCount, 1, 'arrow function invoked exactly once'); 68 69 reportCompare(0, 0);