ary-ptrn-rest-id.js (1905B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-rest-id.case 3 // - src/dstr-binding/default/func-decl.template 4 /*--- 5 description: Lone rest element (function declaration) 6 esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject 7 features: [destructuring-binding] 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 BindingRestElement : ... BindingIdentifier 43 [...] 3. Let A be ArrayCreate(0). [...] 5. Repeat 44 [...] 45 f. Let status be CreateDataProperty(A, ToString (n), nextValue). 46 [...] 47 ---*/ 48 var values = [1, 2, 3]; 49 50 var callCount = 0; 51 function f([...x]) { 52 assert(Array.isArray(x)); 53 assert.sameValue(x.length, 3); 54 assert.sameValue(x[0], 1); 55 assert.sameValue(x[1], 2); 56 assert.sameValue(x[2], 3); 57 assert.notSameValue(x, values); 58 callCount = callCount + 1; 59 }; 60 f(values); 61 assert.sameValue(callCount, 1, 'function invoked exactly once'); 62 63 reportCompare(0, 0);