ary-ptrn-elem-id-init-hole.js (1907B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elem-id-init-hole.case 3 // - src/dstr-binding/default/func-expr.template 4 /*--- 5 description: Destructuring initializer with a "hole" (function expression) 6 esid: sec-function-definitions-runtime-semantics-evaluation 7 features: [destructuring-binding] 8 flags: [generated] 9 info: | 10 FunctionExpression : function ( FormalParameters ) { FunctionBody } 11 12 [...] 13 3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody, 14 scope, strict). 15 [...] 16 17 9.2.1 [[Call]] ( thisArgument, argumentsList) 18 19 [...] 20 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). 21 [...] 22 23 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) 24 25 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). 26 [...] 27 28 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) 29 30 [...] 31 23. Let iteratorRecord be Record {[[iterator]]: 32 CreateListIterator(argumentsList), [[done]]: false}. 33 24. If hasDuplicates is true, then 34 [...] 35 25. Else, 36 b. Let formalStatus be IteratorBindingInitialization for formals with 37 iteratorRecord and env as arguments. 38 [...] 39 40 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 41 SingleNameBinding : BindingIdentifier Initializeropt 42 [...] 6. If Initializer is present and v is undefined, then 43 a. Let defaultValue be the result of evaluating Initializer. 44 b. Let v be GetValue(defaultValue). 45 [...] 46 7. If environment is undefined, return PutValue(lhs, v). 8. Return InitializeReferencedBinding(lhs, v). 47 ---*/ 48 49 var callCount = 0; 50 var f; 51 f = function([x = 23]) { 52 assert.sameValue(x, 23); 53 // another statement 54 callCount = callCount + 1; 55 }; 56 57 f([,]); 58 assert.sameValue(callCount, 1, 'function invoked exactly once'); 59 60 reportCompare(0, 0);