| // Copyright (c) 2011, 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 A type T is more specific than a type S, written T << S, if one |
| /// of the following conditions is met: |
| /// • T is S. |
| /// • T is ⊥ |
| /// • S is dynamic. |
| /// • S is a direct supertype of T. |
| /// • T is a type parameter and S is the upper bound of T. |
| /// • T is a type parameter and S is Object. |
| /// • T is of the form I<T1, ..., Tn > and S is of the form I <S1, ..., Sn> |
| /// and Ti << Si 1 <= i <= n. |
| /// • T and S are both function types, and T << S under the rules of section |
| /// (Types/Function Types). |
| /// • T is a function type and S is Function. |
| /// • T << U and U << S. |
| /// << is a partial order on types. T is a subtype of S, written T <: S, iff |
| /// [⊥/Dynamic]T << S. |
| /// . . . |
| /// An interface type T may be assigned to a type S, written T <=> S, if either |
| /// T <: S or S <: T. |
| /// @description Checks type check and assignment for generic class types with |
| /// a bunch of type parameters. |
| /// @author iefremov |
| |
| import "../../../Utils/expect.dart"; |
| import "dart:collection"; |
| |
| class G {} |
| |
| class IManyArgs<A, B, C, D, E> {} |
| |
| class CManyArgs<A, B, C> extends IManyArgs<int, A, B, C, double> {} |
| |
| // these produce the required static type for static checker |
| // but won't fail at run time because they return null after all |
| void make1(IManyArgs<int, G, G, G, double> v) {} |
| void make2(IManyArgs<int, List, Map, Queue, double> v) {} |
| |
| main() { |
| Expect.isTrue(new CManyArgs<G, G, G>() is IManyArgs<int, G, G, G, double>); |
| Expect.runtimeIsType<IManyArgs<int, G, G, G, double>>( |
| new CManyArgs<G, G, G>()); |
| make1(new CManyArgs<G, G, G>()); |
| IManyArgs<int, G, G, G, double> g6_ = new CManyArgs<G, G, G>(); |
| |
| Expect.isTrue(new CManyArgs<List, Map, Queue>() |
| is IManyArgs<int, List, Map, Queue, double>); |
| Expect.runtimeIsType<IManyArgs<int, List, Map, Queue, double>>( |
| new CManyArgs<List, Map, Queue>()); |
| make2(new CManyArgs<List, Map, Queue>()); |
| IManyArgs<int, List, Map, Queue, double> g7_ = |
| new CManyArgs<List, Map, Queue>(); |
| } |