| /* |
| * 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. |
| */ |
| /** |
| * @assertion An expression of the form e! evaluates e to a value v, throws a |
| * runtime error if v is null, and otherwise evaluates to v. |
| * |
| * @description Check that an expression of the form e! evaluates e to a value |
| * v, throws no runtime error if v is not null. Test identifier |
| * @author sgrekhov@unipro.ru |
| * @issue 39723 |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| // Requirements=nnbd-strong |
| |
| class A { |
| String s = "Show must go on"; |
| foo() {} |
| Object? get getValue => "Lily was here"; |
| int? operator [](int index) => index; |
| void operator []=(int index, String val) { |
| s = val; |
| } |
| } |
| |
| main() { |
| A? a = new A(); |
| a!; |
| a!.foo(); //# 01: static type warning |
| a![42]; //# 02: static type warning |
| a!?.foo(); //# 03: static type warning |
| a!?.[42]; //# 04: static type warning |
| a!.s = "Lily was here"; //# 05: static type warning |
| a!?.s = "Let it be"; //# 06: static type warning |
| a![0] = "Lily was here"; //# 07: static type warning |
| a!?.[0] = "Lily was here"; //# 08: static type warning |
| if (a != null) { |
| a.getValue!; |
| a[42]!; |
| } |
| } |
