| // 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 GenericType<T> is a subtype of GenericType<S> where |
| /// T is subtype of S (T and S are non-generic interfaces and/or Dynamic). |
| /// @author iefremov |
| |
| import "../../../Utils/expect.dart"; |
| |
| class I {} |
| class J implements I {} |
| class K implements J {} |
| |
| class Z<T> { |
| Z() {} |
| } |
| |
| main() { |
| Expect.isTrue(new List<String>.empty() is List); |
| Expect.runtimeIsType<List>(new List<String>.empty()); |
| Expect.isFalse(new List.empty() is List<String>); |
| Expect.runtimeIsNotType<List<String>>(new List.empty()); |
| Expect.isTrue(new List<String>.empty() is List<Object>); |
| Expect.runtimeIsType<List<Object>>(new List<String>.empty()); |
| Expect.isTrue(new List<int>.empty() is List<num>); |
| Expect.runtimeIsType<List<num>>(new List<int>.empty()); |
| Expect.isTrue(new List<int>.empty() is List); |
| Expect.runtimeIsType<List>(new List<int>.empty()); |
| Expect.isTrue(new List<int>.empty() is List<Object>); |
| Expect.runtimeIsType<List<Object>>(new List<int>.empty()); |
| Expect.isTrue(new List<double>.empty() is List<Object>); |
| Expect.runtimeIsType<List<num>>(new List<double>.empty()); |
| Expect.isTrue(new List<double>.empty() is List); |
| Expect.runtimeIsType<List>(new List<double>.empty()); |
| Expect.isTrue(new List<double>.empty() is List<num>); |
| Expect.runtimeIsType<List<num>>(new List<double>.empty()); |
| Expect.isTrue(new List<J>.empty() is List); |
| Expect.runtimeIsType<List>(new List<J>.empty()); |
| Expect.isTrue(new List<J>.empty() is List<Object>); |
| Expect.runtimeIsType<List<Object>>(new List<J>.empty()); |
| Expect.isTrue(new List<J>.empty() is List<I>); |
| Expect.runtimeIsType<List<I>>(new List<J>.empty()); |
| Expect.isTrue(new List<K>.empty() is List<I>); |
| Expect.runtimeIsType<List<I>>(new List<K>.empty()); |
| Expect.isTrue(new List<K>.empty() is List<J>); |
| Expect.runtimeIsType<List<I>>(new List<K>.empty()); |
| |
| Expect.isTrue(new Z<String>() is Z); |
| Expect.runtimeIsType<Z>(new Z<String>()); |
| Expect.isFalse(new Z() is Z<String>); |
| Expect.runtimeIsNotType<Z<String>>(new Z()); |
| Expect.isTrue(new Z<String>() is Z<Object>); |
| Expect.runtimeIsType<Z<Object>>(new Z<String>()); |
| Expect.isTrue(new Z<int>() is Z<num>); |
| Expect.runtimeIsType<Z<num>>(new Z<int>()); |
| Expect.isTrue(new Z<int>() is Z); |
| Expect.runtimeIsType<Z>(new Z<int>()); |
| Expect.isTrue(new Z<int>() is Z<Object>); |
| Expect.runtimeIsType<Z<Object>>(new Z<int>()); |
| Expect.isTrue(new Z<double>() is Z<Object>); |
| Expect.runtimeIsType<Z<Object>>(new Z<double>()); |
| Expect.isTrue(new Z<double>() is Z); |
| Expect.runtimeIsType<Z>(new Z<double>()); |
| Expect.isTrue(new Z<double>() is Z<num>); |
| Expect.runtimeIsType<Z<num>>(new Z<double>()); |
| Expect.isTrue(new Z<J>() is Z); |
| Expect.runtimeIsType<Z>(new Z<J>()); |
| Expect.isTrue(new Z<J>() is Z<Object>); |
| Expect.runtimeIsType<Z<Object>>(new Z<J>()); |
| Expect.isTrue(new Z<J>() is Z<I>); |
| Expect.runtimeIsType<Z<I>>(new Z<J>()); |
| Expect.isTrue(new Z<K>() is Z<I>); |
| Expect.runtimeIsType<Z<I>>(new Z<K>()); |
| Expect.isTrue(new Z<K>() is Z<J>); |
| Expect.runtimeIsType<Z<J>>(new Z<K>()); |
| } |