| // 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. | |
| class C { | |
| int y = 42; | |
| D? f() => new D(); | |
| C h() => this; | |
| } | |
| class D { | |
| D g() => this; | |
| String operator [](String s) { | |
| return "!$s!"; | |
| } | |
| } | |
| void test(C x) { | |
| x | |
| ..f()!.g()['Hi!']! | |
| ..h()!.y = 2; | |
| } | |
| main() { | |
| test(new C()); | |
| } |