async-func-dstr-let-ary-ptrn-rest-not-final-ary.js (1953B)
1 // |reftest| error:SyntaxError 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/ary-ptrn-rest-not-final-ary.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-func-let.template 5 /*--- 6 description: Rest element (array binding pattern) may not be followed by any 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] 10 negative: 11 phase: parse 12 type: SyntaxError 13 info: | 14 IterationStatement : 15 for await ( ForDeclaration of AssignmentExpression ) Statement 16 17 [...] 18 2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, 19 lexicalBinding, labelSet, async). 20 21 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 22 23 [...] 24 4. Let destructuring be IsDestructuring of lhs. 25 [...] 26 6. Repeat 27 [...] 28 j. If destructuring is false, then 29 [...] 30 k. Else 31 i. If lhsKind is assignment, then 32 [...] 33 ii. Else if lhsKind is varBinding, then 34 [...] 35 iii. Else, 36 1. Assert: lhsKind is lexicalBinding. 37 2. Assert: lhs is a ForDeclaration. 38 3. Let status be the result of performing BindingInitialization 39 for lhs passing nextValue and iterationEnv as arguments. 40 [...] 41 42 13.3.3 Destructuring Binding Patterns 43 ArrayBindingPattern[Yield] : 44 [ Elisionopt BindingRestElement[?Yield]opt ] 45 [ BindingElementList[?Yield] ] 46 [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ] 47 ---*/ 48 $DONOTEVALUATE(); 49 50 var iterCount = 0; 51 52 async function fn() { 53 for await (let [...[x], y] of [[1, 2, 3]]) { 54 55 56 iterCount += 1; 57 } 58 } 59 60 fn() 61 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 62 .then($DONE, $DONE);