| /* |
| * 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 In an unmigrated library, override checking is done using legacy |
| * types. This means that an unmigrated library can bring together otherwise |
| * incompatible methods. When choosing the most specific signature during |
| * interface computation, all nullability and requiredness annotations are |
| * ignored, and the [Never] type is treated as [Null]. |
| * |
| * @description Check that if legacy class implements opted-in class, all |
| * nullability annotations in the parent class are ignored in the child class |
| * type parameters and class type parameter can be [Null]. |
| * |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| // @dart=2.6 |
| |
| import "../../Utils/expect.dart"; |
| import "override_checking_opted_in_lib.dart"; |
| |
| class D1<X extends A> implements D<X> { |
| dynamic getParamType() => X; |
| } |
| |
| class E1<X extends A> implements E<X> { |
| dynamic getParamType() => X; |
| } |
| |
| main() { |
| D<Null> d = D<Null>(); |
| Expect.equals(Null, d.getParamType()); |
| |
| E<Null> e = E<Null>(); |
| Expect.equals(Null, e.getParamType()); |
| |
| D1<Null> d1 = D1<Null>(); |
| Expect.equals(Null, d1.getParamType()); |
| |
| E1<Null> e1 = E1<Null>(); |
| Expect.equals(Null, e1.getParamType()); |
| } |