async-gen-dstr-const-ary-ptrn-rest-ary-empty.js (2238B)
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-gen-const.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 ( 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 BindingRestElement : ... BindingPattern 42 43 1. Let A be ArrayCreate(0). 44 [...] 45 3. Repeat 46 [...] 47 b. If iteratorRecord.[[done]] is true, then 48 i. Return the result of performing BindingInitialization of 49 BindingPattern with A and environment as the arguments. 50 [...] 51 52 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 53 54 ArrayBindingPattern : [ ] 55 56 1. Return NormalCompletion(empty). 57 58 ---*/ 59 var iterations = 0; 60 var iter = function*() { 61 iterations += 1; 62 }(); 63 64 var iterCount = 0; 65 66 async function *fn() { 67 for await (const [...[]] of [iter]) { 68 assert.sameValue(iterations, 1); 69 70 iterCount += 1; 71 } 72 } 73 74 fn().next() 75 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 76 .then($DONE, $DONE);