| // 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 |
| /// NORM(R Function<X extends B>(S)) = R1 Function<X extends B1>(S1) |
| /// where R1 = NORM(R) |
| /// and B1 = NORM(B) |
| /// and S1 = NORM(S) |
| /// |
| /// @description Checks that NORM(R Function<X extends B>(S)) = |
| /// R1 Function<X extends B1>(S1). |
| /// |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-strong |
| class A<X> {} |
| class B<X> implements A<X> {} |
| |
| typedef dynamic? F1<X>(Never? x); |
| typedef dynamic F2<X>(Null x); |
| |
| class C extends B<F1<Never?>> implements A<F2<Null>> {} |
| |
| main() { |
| new C(); |
| } |
