| // 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 It is no static warning if an instance method m1 overrides an |
| * instance member m2 and the type of m1 is not a subtype of the type of m2. |
| * @description Checks that there are no warnings when type of m1 is in fact |
| * a subtype of type of m2. Checks instance methods with no optional |
| * parameters. Test type aliases |
| * @static-clean |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=nonfunction-type-aliases |
| |
| class Super {} |
| class Sub extends Super {} |
| |
| class A { |
| num? f1() {} |
| Super? f2() {} |
| Super? f3() {} |
| Sub? f4() {} |
| |
| int? f5(Super x) {} |
| Super? f6(Super x) {} |
| Super? f7(Sub x) {} |
| Sub? f8(Super x) {} |
| } |
| typedef AAlias = A; |
| |
| class C extends AAlias { |
| int? f1() {} |
| Super? f2() {} |
| Sub? f3() {} |
| Sub? f4() {} |
| |
| int? f5(dynamic x) {} |
| Super? f6(Super x) {} |
| Super? f7(Super x) {} |
| Sub? f8(Super x) {} |
| } |
| |
| main() { |
| new A(); |
| new C(); |
| } |
