dflt-ary-ptrn-elem-id-init-hole.js (1982B)
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-decl-dflt.template 4 /*--- 5 description: Destructuring initializer with a "hole" (function declaration (default parameter)) 6 esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject 7 features: [destructuring-binding, default-parameters] 8 flags: [generated] 9 info: | 10 FunctionDeclaration : 11 function BindingIdentifier ( FormalParameters ) { FunctionBody } 12 13 [...] 14 3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody, 15 scope, strict). 16 [...] 17 18 9.2.1 [[Call]] ( thisArgument, argumentsList) 19 20 [...] 21 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). 22 [...] 23 24 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) 25 26 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). 27 [...] 28 29 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) 30 31 [...] 32 23. Let iteratorRecord be Record {[[iterator]]: 33 CreateListIterator(argumentsList), [[done]]: false}. 34 24. If hasDuplicates is true, then 35 [...] 36 25. Else, 37 b. Let formalStatus be IteratorBindingInitialization for formals with 38 iteratorRecord and env as arguments. 39 [...] 40 41 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 42 SingleNameBinding : BindingIdentifier Initializeropt 43 [...] 6. If Initializer is present and v is undefined, then 44 a. Let defaultValue be the result of evaluating Initializer. 45 b. Let v be GetValue(defaultValue). 46 [...] 47 7. If environment is undefined, return PutValue(lhs, v). 8. Return InitializeReferencedBinding(lhs, v). 48 ---*/ 49 50 var callCount = 0; 51 function f([x = 23] = [,]) { 52 assert.sameValue(x, 23); 53 // another statement 54 callCount = callCount + 1; 55 }; 56 f(); 57 assert.sameValue(callCount, 1, 'function invoked exactly once'); 58 59 reportCompare(0, 0);