| // Copyright (c) 2018, 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. |
| |
| // Test of the subtype relationship that includes parametrized typedefs and |
| // invariant occurrences of types. |
| |
| typedef H<X> = void Function<Y extends X>(); |
| |
| class A {} |
| |
| class B extends A {} |
| |
| class C extends B {} |
| |
| void foo(H<A> ha, H<B> hb, H<C> hc) { |
| H<A> haa = ha; //# 01: ok |
| H<A> hab = hb; //# 02: compile-time error |
| H<A> hac = hc; //# 03: compile-time error |
| |
| H<B> hba = ha; //# 04: compile-time error |
| H<B> hbb = hb; //# 05: ok |
| H<B> hbc = hc; //# 06: compile-time error |
| |
| H<C> hca = ha; //# 07: compile-time error |
| H<C> hcb = hb; //# 08: compile-time error |
| H<C> hcc = hc; //# 09: ok |
| } |
| |
| main() {} |