async-func-dstr-var-ary-ptrn-rest-ary-empty.js (2120B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/ary-ptrn-rest-ary-empty.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-func-var.template 5 /*--- 6 description: Rest element containing an "empty" array pattern (for-await-of statement) 7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 8 features: [generators, destructuring-binding, async-iteration] 9 flags: [generated, async] 10 info: | 11 IterationStatement : 12 for await ( var ForBinding of AssignmentExpression ) Statement 13 14 [...] 15 2. Return ? ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult, 16 varBinding, labelSet, async). 17 18 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 19 20 [...] 21 4. Let destructuring be IsDestructuring of lhs. 22 [...] 23 6. Repeat 24 [...] 25 j. If destructuring is false, then 26 [...] 27 k. Else 28 i. If lhsKind is assignment, then 29 [...] 30 ii. Else if lhsKind is varBinding, then 31 1. Assert: lhs is a ForBinding. 32 2. Let status be the result of performing BindingInitialization 33 for lhs passing nextValue and undefined as the arguments. 34 [...] 35 36 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 37 38 BindingRestElement : ... BindingPattern 39 40 1. Let A be ArrayCreate(0). 41 [...] 42 3. Repeat 43 [...] 44 b. If iteratorRecord.[[done]] is true, then 45 i. Return the result of performing BindingInitialization of 46 BindingPattern with A and environment as the arguments. 47 [...] 48 49 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 50 51 ArrayBindingPattern : [ ] 52 53 1. Return NormalCompletion(empty). 54 55 ---*/ 56 var iterations = 0; 57 var iter = function*() { 58 iterations += 1; 59 }(); 60 61 var iterCount = 0; 62 63 async function fn() { 64 for await (var [...[]] of [iter]) { 65 assert.sameValue(iterations, 1); 66 67 iterCount += 1; 68 } 69 } 70 71 fn() 72 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 73 .then($DONE, $DONE);