| // Copyright (c) 2019, 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 |
| /// typeParameter ::= metadata identifier (extends typeNotVoid)? |
| /// typeParameters ::= ‘<’ typeParameter (‘,’ typeParameter)* ‘>’ |
| /// ... |
| /// Type parameters are declared in the type parameter scope of a class or |
| /// function. ... The type parameters of a generic class declaration [G] are also |
| /// in scope in the [extends] and [implements] clauses of [G] (if these exist) |
| /// and in the body of [G]. |
| /// @description Checks that class type parameter is in the scope of its |
| /// [implements] clause. |
| /// @author iarkh@unipro.ru |
| |
| |
| import "../../Utils/expect.dart"; |
| |
| class A {} |
| class B extends A {} |
| class C<X> {} |
| |
| class D<X extends A> implements C<X> {} |
| |
| main() { |
| Expect.isTrue(D() is C); |
| Expect.isTrue(D() is C<A>); |
| Expect.isFalse(D() is C<B>); |
| |
| Expect.isTrue(D<A>() is C); |
| Expect.isTrue(D<A>() is C<A>); |
| Expect.isFalse(D<A>() is C<B>); |
| |
| Expect.isTrue(D<B>() is C); |
| Expect.isTrue(D<B>() is C<A>); |
| Expect.isTrue(D<B>() is C<B>); |
| } |