// |reftest| async // This file was procedurally generated from the following sources: // - src/dstr-binding/ary-ptrn-elem-obj-prop-id.case // - src/dstr-binding/default/async-gen-func-decl.template /*--- description: BindingElement with object binding pattern and initializer is not used (async generator function declaration) esid: sec-asyncgenerator-definitions-instantiatefunctionobject features: [async-iteration] flags: [generated, async] info: | AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) { AsyncGeneratorBody } [...] 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody, scope, strict). [...] 13.3.3.6 Runtime Semantics: IteratorBindingInitialization BindingElement : BindingPatternInitializer opt [...] 2. If iteratorRecord.[[done]] is true, let v be undefined. 3. If Initializer is present and v is undefined, then a. Let defaultValue be the result of evaluating Initializer. b. Let v be ? GetValue(defaultValue). 4. Return the result of performing BindingInitialization of BindingPattern with v and environment as the arguments. ---*/ var callCount = 0; async function* f([{ u: v, w: x, y: z } = { u: 444, w: 555, y: 666 }]) { assert.sameValue(v, 777); assert.sameValue(x, 888); assert.sameValue(z, 999); assert.throws(ReferenceError, function() { u; }); assert.throws(ReferenceError, function() { w; }); assert.throws(ReferenceError, function() { y; }); callCount = callCount + 1; }; f([{ u: 777, w: 888, y: 999 }]).next().then(() => { assert.sameValue(callCount, 1, 'invoked exactly once'); }).then($DONE, $DONE);