| // 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 that two generic types are not assignable even if just |
| /// one type argument is not assignable. Using complex function types as type |
| /// arguments. |
| /// @compile-error |
| /// @author iefremov |
| |
| |
| class I {} |
| class J extends I {} |
| class K extends J {} |
| class C implements K {} |
| |
| typedef Map<List, List<Map<num,List>>> complexFunction_t1(); |
| typedef t1_1(); |
| typedef Map<List<int>, List> t1_2(); |
| typedef Map<List<int>, List<Map>> t1_3(); |
| typedef Map<List<complexFunction_t1>, |
| List<Map<int, |
| List<Map<complexFunction_t1, |
| complexFunction_t2>>>>> t1_4(); |
| |
| typedef badFunction(int x); //not assignable to complexFunction_t1 |
| |
| typedef complexFunction_t1 complexFunction_t2( |
| complexFunction_t1 f1, |
| complexFunction_t1 f2); |
| typedef t1_1 t2_1(t1_2 f1, badFunction f2); //not assignable to complexFunction_t2 because of badFunction |
| |
| typedef K typeParameter1(J j, complexFunction_t1 f1, [num i, complexFunction_t2 f2]); |
| // <=> <=> <=> <=> <=/=> |
| typedef C typeParameter2(K j, t1_4 f1, [int i, t2_1 f2]); |
| |
| |
| class Generic<G> {} |
| |
| Generic<typeParameter2> f() => new Generic<typeParameter2>(); |
| |
| main() { |
| Generic<typeParameter1> g = f(); |
| } |