| /* |
| * Copyright (c) 2020, 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 |
| * and child class type parameter can be [Null] even if parent class type |
| * parameter is non-nullable. |
| * |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| // @dart=2.6 |
| |
| import "../../Utils/expect.dart"; |
| import "override_checking_A01_opted_in_lib.dart"; |
| |
| class A1<T extends Null> implements OPTED_NONNULLABLE_INT<T> { dynamic getParamType() => typeOf<T>(); } |
| class A2<T extends Null> implements OPTED_NONNULLABLE_OBJECT<T> { dynamic getParamType() => typeOf<T>(); } |
| class A3<T extends Null> implements OPTED_NONNULLABLE_FUNCTION<T> { dynamic getParamType() => typeOf<T>(); } |
| |
| main() { |
| Expect.equals(Null, A1().getParamType()); |
| Expect.equals(Null, A1<Null>().getParamType()); |
| |
| Expect.equals(Null, A2().getParamType()); |
| Expect.equals(Null, A2<Null>().getParamType()); |
| |
| Expect.equals(Null, A3().getParamType()); |
| Expect.equals(Null, A3<Null>().getParamType()); |
| } |