| /* |
| * 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 S is a direct supertype of T. |
| * << is a partial order on types. T is a subtype of S, written T <: S, iff [⊥/Dynamic]T << S. |
| * A type T may be assigned to a type S, written T <=> S, if either T <: S or S <: T. |
| * @description Checks that this statement is true for a class type extending parameterized class type. |
| * @author iefremov |
| * @reviewer rodionov |
| */ |
| import "../../Utils/expect.dart"; |
| |
| class G<T> {} |
| class NonGeneric extends G<int> {} |
| |
| // these produce the required static type for static checker |
| // but won't fail at run time because they return null after all |
| G makeG() {} |
| G<int> makeGint() {} |
| |
| main() { |
| Expect.isTrue(new NonGeneric() is G); |
| NonGeneric g4 = makeG(); |
| G g4_ = new NonGeneric(); |
| |
| Expect.isTrue(new NonGeneric() is G<int>); |
| NonGeneric g5 = makeGint(); |
| G<int> g5_ = new NonGeneric(); |
| } |