| /* |
| * 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 Null? F1<X extends Never>(dynamic? x); |
| typedef Null F2<X>(dynamic x); |
| |
| class C extends B<F1<Never>> implements A<F2<Never>> {} |
| |
| main() { |
| new C(); |
| } |
