dflt-ary-ptrn-elem-ary-rest-iter.js (2230B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elem-ary-rest-iter.case 3 // - src/dstr-binding/default/arrow-function-dflt.template 4 /*--- 5 description: BindingElement with array binding pattern and initializer is not used (arrow function expression (default parameter)) 6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation 7 features: [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 BindingElement : BindingPatternInitializer opt 42 43 1. If iteratorRecord.[[done]] is false, then 44 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 45 [...] 46 e. Else, 47 i. Let v be IteratorValue(next). 48 [...] 49 4. Return the result of performing BindingInitialization of BindingPattern 50 with v and environment as the arguments. 51 ---*/ 52 var values = [2, 1, 3]; 53 var initCount = 0; 54 55 var callCount = 0; 56 var f; 57 f = ([[...x] = function() { initCount += 1; }()] = [values]) => { 58 assert(Array.isArray(x)); 59 assert.sameValue(x[0], 2); 60 assert.sameValue(x[1], 1); 61 assert.sameValue(x[2], 3); 62 assert.sameValue(x.length, 3); 63 assert.notSameValue(x, values); 64 assert.sameValue(initCount, 0); 65 callCount = callCount + 1; 66 }; 67 68 f(); 69 assert.sameValue(callCount, 1, 'arrow function invoked exactly once'); 70 71 reportCompare(0, 0);