| // Copyright (c) 2022, 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 instance field is promotable if all the following conditions |
| /// hold: |
| /// - It refers to a field (not a getter) |
| /// - The field is private |
| /// - The field is final |
| /// - There is no getter with the same name elsewhere in the library |
| /// - There is no non-final field with the same name elsewhere in the library |
| /// - There is no implicit noSuchMethod forwarder with the same name elsewhere |
| /// in the library. |
| /// |
| /// @descriptionChecks that if there is a non-final abstract field with the same |
| /// name in some abstract class in the same library then the field is not |
| /// promotable |
| /// @author sgrekhov22@gmail.com |
| |
| class A<T> { |
| final T _x; |
| A(this._x); |
| |
| void testA() { |
| if (_x is int) { |
| _x.isOdd; |
| // ^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
| } |
| } |
| |
| abstract class C<T> { |
| abstract T _x; |
| C(); |
| } |
| |
| main() { |
| A<num?> a = A(42); |
| if (a._x is int) { |
| a._x.isEven; |
| // ^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
| a.testA(); |
| } |
