// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-binding-for-await/ary-ptrn-elem-ary-rest-iter.case // - src/dstr-binding-for-await/default/for-await-of-async-gen-const.template /*--- description: BindingElement with array binding pattern and initializer is not used (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 BindingElement : BindingPattern Initializer_opt 1. If iteratorRecord.[[done]] is false, then a. Let next be IteratorStep(iteratorRecord.[[iterator]]). [...] e. Else, i. Let v be IteratorValue(next). [...] 4. Return the result of performing BindingInitialization of BindingPattern with v and environment as the arguments. ---*/ var values = [2, 1, 3]; var initCount = 0; var iterCount = 0; async function *fn() { for await (const [[...x] = function() { initCount += 1; }()] of [[values]]) { assert(Array.isArray(x)); assert.sameValue(x[0], 2); assert.sameValue(x[1], 1); assert.sameValue(x[2], 3); assert.sameValue(x.length, 3); assert.notSameValue(x, values); assert.sameValue(initCount, 0); iterCount += 1; } } fn().next() .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) .then($DONE, $DONE);