ary-ptrn-elem-id-init-fn-name-fn.js (2067B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elem-id-init-fn-name-fn.case 3 // - src/dstr-binding/default/arrow-function.template 4 /*--- 5 description: SingleNameBinding assigns name to "anonymous" functions (arrow function expression) 6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation 7 features: [destructuring-binding] 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 SingleNameBinding : BindingIdentifier Initializeropt 42 43 [...] 44 6. If Initializer is present and v is undefined, then 45 a. Let defaultValue be the result of evaluating Initializer. 46 b. Let v be GetValue(defaultValue). 47 c. ReturnIfAbrupt(v). 48 d. If IsAnonymousFunctionDefinition(Initializer) is true, then 49 [...] 50 7. If environment is undefined, return PutValue(lhs, v). 51 8. Return InitializeReferencedBinding(lhs, v). 52 ---*/ 53 54 var callCount = 0; 55 var f; 56 f = ([fn = function () {}, xFn = function x() {}]) => { 57 assert.sameValue(fn.name, 'fn'); 58 assert.notSameValue(xFn.name, 'xFn'); 59 callCount = callCount + 1; 60 }; 61 62 f([]); 63 assert.sameValue(callCount, 1, 'arrow function invoked exactly once'); 64 65 reportCompare(0, 0);