// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-binding-for-await/obj-ptrn-prop-ary-init.case // - src/dstr-binding-for-await/default/for-await-of-async-gen-var.template /*--- description: Object binding pattern with "nested" array binding pattern using initializer (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 ( var ForBinding of AssignmentExpression ) Statement [...] 2. Return ? ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult, varBinding, 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 1. Assert: lhs is a ForBinding. 2. Let status be the result of performing BindingInitialization for lhs passing nextValue and undefined as the arguments. [...] 13.3.3.7 Runtime Semantics: KeyedBindingInitialization [...] 4. If Initializer is present and v is undefined, then a. Let defaultValue be the result of evaluating Initializer. b. Set v to ? GetValue(defaultValue). 4. Return the result of performing BindingInitialization for BindingPattern passing v and environment as arguments. ---*/ var iterCount = 0; async function *fn() { for await (var { w: [x, y, z] = [4, 5, 6] } of [{}]) { assert.sameValue(x, 4); assert.sameValue(y, 5); assert.sameValue(z, 6); assert.throws(ReferenceError, function() { w; }); iterCount += 1; } } fn().next() .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) .then($DONE, $DONE);