| // 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 |
| /// @issue 41193 |
| |
| |
| 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() { |
| var a = new A() as A?; |
| a!; |
| a!.foo(); |
| //^ |
| // [cfe] Operand of null-aware operation '!' has type 'A' which excludes null. |
| // ^ |
| // [analyzer] STATIC_WARNING.UNNECESSARY_NON_NULL_ASSERTION |
| a![42]; |
| //^ |
| // [cfe] Operand of null-aware operation '!' has type 'A' which excludes null. |
| // ^ |
| // [analyzer] STATIC_WARNING.UNNECESSARY_NON_NULL_ASSERTION |
| a!?.foo(); |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| a!?[42]; |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| a!.s = "Lily was here"; |
| //^ |
| // [cfe] Operand of null-aware operation '!' has type 'A' which excludes null. |
| // ^ |
| // [analyzer] STATIC_WARNING.UNNECESSARY_NON_NULL_ASSERTION |
| a!?.s = "Let it be"; |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| a![0] = "Lily was here"; |
| //^ |
| // [cfe] Operand of null-aware operation '!' has type 'A' which excludes null. |
| // ^ |
| // [analyzer] STATIC_WARNING.UNNECESSARY_NON_NULL_ASSERTION |
| a!?[0] = "Lily was here"; |
| // ^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| if (a != null) { |
| a.getValue!; |
| a[42]!; |
| } |
| } |