| /* |
| * 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. |
| */ |
| /** |
| * @assertion Let [G] be a generic class or parameterized type alias with formal |
| * type parameter declarations [F1] .. [Fk] containing formal type parameters |
| * [X1] .. [Xk] and bounds [B1] .. [Bk]. We say that the formal type parameter |
| * [Xj] has a simple bound when one of the following requirements is satisfied: |
| * [Bj] is omitted. |
| * [Bj] is included, but does not contain any of [X1] .. [Xk]. If [Bj] contains |
| * a type [T] on the form qualified (for instance, [C] or [p.D]) which denotes a |
| * generic class or parameterized type alias [G1] (that is, [T] is a raw type), |
| * every type argument of [G1] has a simple bound. |
| * @description Checks that simple bounds are correct for lists and maps |
| * parameters: [A<X extends List>], [B<X extends Map>] |
| * @author iarkh@unipro.ru |
| */ |
| |
| typedef F<X> = void Function<Y extends X>(); |
| F<X> toF<X>(X x) => null; |
| |
| class A<X extends List> {} |
| class B<X extends Map> {} |
| |
| testA() { |
| A source; |
| var fsource = toF(source); |
| F<A<List>> target1 = fsource; |
| F<A<List<dynamic>>> target2 = fsource; |
| |
| F<A<List<int>>> target3 = fsource; //# 01: compile-time error |
| F<A<List<Null>>> target4 = fsource; //# 02: compile-time error |
| |
| A(); |
| } |
| |
| testB() { |
| B source; |
| var fsource = toF(source); |
| F<B<Map>> target1 = fsource; |
| F<B<Map<dynamic, dynamic>>> target2 = fsource; |
| |
| F<B<Map<int, dynamic>>> target3 = fsource; //# 01: compile-time error |
| F<B<Map<dynamic, int>>> target4 = fsource; //# 02: compile-time error |
| F<B<Map<int, Null>>> target5 = fsource; //# 03: compile-time error |
| F<B<Map<Null, int>>> target6 = fsource; //# 04: compile-time error |
| F<B<Map<int, int>>> target7 = fsource; //# 05: compile-time error |
| F<B<Map<Null, Null>>> target8 = fsource; //# 06: compile-time error |
| |
| B(); |
| } |
| |
| main() { |
| testA(); |
| testB(); |
| } |