// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-binding-for-await/obj-ptrn-prop-obj.case // - src/dstr-binding-for-await/default/for-await-of-async-func-let.template /*--- description: Object binding pattern with "nested" object binding pattern not 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 ( 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. [...] 13.3.3.7 Runtime Semantics: KeyedBindingInitialization [...] 3. If Initializer is present and v is undefined, then [...] 4. Return the result of performing BindingInitialization for BindingPattern passing v and environment as arguments. ---*/ var iterCount = 0; async function fn() { for await (let { w: { x, y, z } = { x: 4, y: 5, z: 6 } } of [{ w: { x: undefined, z: 7 } }]) { assert.sameValue(x, undefined); assert.sameValue(y, undefined); assert.sameValue(z, 7); assert.throws(ReferenceError, function() { w; }); iterCount += 1; } } fn() .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) .then($DONE, $DONE);