async-gen-dstr-let-async-ary-ptrn-rest-ary-rest.js (2264B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/ary-ptrn-rest-ary-rest.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-gen-let-async.template 5 /*--- 6 description: Rest element containing a rest element (for-await-of statement) 7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 8 features: [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 var values = [1, 2, 3]; 53 54 var iterCount = 0; 55 var asyncIter = (async function*() { 56 yield* [values]; 57 })(); 58 59 async function *fn() { 60 for await (let [...[...x]] of asyncIter) { 61 assert(Array.isArray(x)); 62 assert.sameValue(x.length, 3); 63 assert.sameValue(x[0], 1); 64 assert.sameValue(x[1], 2); 65 assert.sameValue(x[2], 3); 66 assert.notSameValue(x, values); 67 68 69 iterCount += 1; 70 } 71 } 72 73 fn().next() 74 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 75 .then($DONE, $DONE);