var-ary-ptrn-elem-id-iter-val.js (2173B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elem-id-iter-val.case 3 // - src/dstr-binding/default/for-of-var.template 4 /*--- 5 description: SingleNameBinding when value iteration was completed previously (for-of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [destructuring-binding] 8 flags: [generated] 9 info: | 10 IterationStatement : 11 for ( var ForBinding of AssignmentExpression ) Statement 12 13 [...] 14 3. Return ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult, 15 varBinding, labelSet). 16 17 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 18 19 [...] 20 3. Let destructuring be IsDestructuring of lhs. 21 [...] 22 5. Repeat 23 [...] 24 h. If destructuring is false, then 25 [...] 26 i. Else 27 i. If lhsKind is assignment, then 28 [...] 29 ii. Else if lhsKind is varBinding, then 30 1. Assert: lhs is a ForBinding. 31 2. Let status be the result of performing BindingInitialization 32 for lhs passing nextValue and undefined as the arguments. 33 [...] 34 35 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 36 37 SingleNameBinding : BindingIdentifier Initializeropt 38 39 [...] 40 4. If iteratorRecord.[[done]] is false, then 41 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 42 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 43 c. ReturnIfAbrupt(next). 44 d. If next is false, set iteratorRecord.[[done]] to true. 45 e. Else, 46 [...] 47 i. Let v be IteratorValue(next). 48 ii. If v is an abrupt completion, set 49 iteratorRecord.[[done]] to true. 50 iii. ReturnIfAbrupt(v). 51 5. If iteratorRecord.[[done]] is true, let v be undefined. 52 [...] 53 8. Return InitializeReferencedBinding(lhs, v). 54 ---*/ 55 56 var iterCount = 0; 57 58 for (var [x, y, z] of [[1, 2, 3]]) { 59 assert.sameValue(x, 1); 60 assert.sameValue(y, 2); 61 assert.sameValue(z, 3); 62 63 iterCount += 1; 64 } 65 66 assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); 67 68 reportCompare(0, 0);