| // Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file | |
| // for details. All rights reserved. Use of this source code is governed by a | |
| // BSD-style license that can be found in the LICENSE file. | |
| // SharedOptions=--enable-experiment=non-nullable | |
| import "package:expect/expect.dart"; | |
| class C { | |
| int? y; | |
| D? f() => new D(); | |
| C? h() => this; | |
| } | |
| class D { | |
| D g() => this; | |
| bool? operator [](String s) => true; | |
| } | |
| void test(C x) { | |
| x..f()!.g()['Hi!']!..h()!.y = 2; | |
| } | |
| main() { | |
| test(new C()); | |
| } |