async-gen-dstr-const-async-ary-ptrn-elision-exhausted.js (2159B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/ary-ptrn-elision-exhausted.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-gen-const-async.template 5 /*--- 6 description: Elision accepts exhausted iterator (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 ( ForDeclaration of AssignmentExpression ) Statement 13 14 [...] 15 2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, 16 lexicalBinding, 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 [...] 32 iii. Else, 33 1. Assert: lhsKind is lexicalBinding. 34 2. Assert: lhs is a ForDeclaration. 35 3. Let status be the result of performing BindingInitialization 36 for lhs passing nextValue and iterationEnv as arguments. 37 [...] 38 39 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 40 41 ArrayBindingPattern : [ Elision ] 42 43 1. Return the result of performing 44 IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord 45 as the argument. 46 47 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation 48 49 Elision : , 50 51 1. If iteratorRecord.[[done]] is false, then 52 [...] 53 2. Return NormalCompletion(empty). 54 55 ---*/ 56 var iter = function*() {}(); 57 iter.next(); 58 59 var iterCount = 0; 60 var asyncIter = (async function*() { 61 yield* [iter]; 62 })(); 63 64 async function *fn() { 65 for await (const [,] of asyncIter) { 66 67 68 iterCount += 1; 69 } 70 } 71 72 fn().next() 73 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 74 .then($DONE, $DONE);