ary-ptrn-rest-ary-elision.js (1920B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-rest-ary-elision.case 3 // - src/dstr-binding/default/var-stmt.template 4 /*--- 5 description: Rest element containing an elision (`var` statement) 6 esid: sec-variable-statement-runtime-semantics-evaluation 7 features: [generators, destructuring-binding] 8 flags: [generated] 9 info: | 10 VariableDeclaration : BindingPattern Initializer 11 12 1. Let rhs be the result of evaluating Initializer. 13 2. Let rval be GetValue(rhs). 14 3. ReturnIfAbrupt(rval). 15 4. Return the result of performing BindingInitialization for 16 BindingPattern passing rval and undefined as arguments. 17 18 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 19 20 BindingRestElement : ... BindingPattern 21 22 1. Let A be ArrayCreate(0). 23 [...] 24 3. Repeat 25 [...] 26 b. If iteratorRecord.[[done]] is true, then 27 i. Return the result of performing BindingInitialization of 28 BindingPattern with A and environment as the arguments. 29 [...] 30 31 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 32 33 ArrayBindingPattern : [ Elision ] 34 35 1. Return the result of performing 36 IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord 37 as the argument. 38 39 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation 40 41 Elision : , 42 43 1. If iteratorRecord.[[done]] is false, then 44 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 45 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 46 c. ReturnIfAbrupt(next). 47 d. If next is false, set iteratorRecord.[[done]] to true. 48 2. Return NormalCompletion(empty). 49 50 ---*/ 51 var first = 0; 52 var second = 0; 53 function* g() { 54 first += 1; 55 yield; 56 second += 1; 57 }; 58 59 var [...[,]] = g(); 60 61 assert.sameValue(first, 1); 62 assert.sameValue(second, 1); 63 64 reportCompare(0, 0);