// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-binding-for-await/ary-ptrn-rest-id-elision.case // - src/dstr-binding-for-await/default/for-await-of-async-func-const.template /*--- description: Rest element following elision elements (for-await-of statement) esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation features: [destructuring-binding, async-iteration] flags: [generated, async] info: | IterationStatement : for await ( ForDeclaration of AssignmentExpression ) Statement [...] 2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, lexicalBinding, labelSet, async). 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation [...] 4. Let destructuring be IsDestructuring of lhs. [...] 6. Repeat [...] j. If destructuring is false, then [...] k. Else i. If lhsKind is assignment, then [...] ii. Else if lhsKind is varBinding, then [...] iii. Else, 1. Assert: lhsKind is lexicalBinding. 2. Assert: lhs is a ForDeclaration. 3. Let status be the result of performing BindingInitialization for lhs passing nextValue and iterationEnv as arguments. [...] 13.3.3.6 Runtime Semantics: IteratorBindingInitialization ArrayBindingPattern : [ Elisionopt BindingRestElement ] 1. If Elision is present, then a. Let status be the result of performing IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord as the argument. b. ReturnIfAbrupt(status). 2. Return the result of performing IteratorBindingInitialization for BindingRestElement with iteratorRecord and environment as arguments. ---*/ var values = [1, 2, 3, 4, 5]; var iterCount = 0; async function fn() { for await (const [ , , ...x] of [values]) { assert(Array.isArray(x)); assert.sameValue(x.length, 3); assert.sameValue(x[0], 3); assert.sameValue(x[1], 4); assert.sameValue(x[2], 5); assert.notSameValue(x, values); iterCount += 1; } } fn() .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) .then($DONE, $DONE);