| /* |
| * 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)* ‘>’ |
| * A type parameter [T] may be suffixed with an [extends] clause that specifies |
| * the upper bound for [T]. |
| * @description Checks that [extends] clause specifies upper bound for the class |
| * type parameter |
| * @author iarkh@unipro.ru |
| */ |
| |
| class A {} |
| class B extends A {} |
| class C extends B {} |
| |
| class C1<T extends A> {} |
| class C2<T extends B> {} |
| class C3<T extends C> {} |
| |
| main() { |
| C1 c11 = C1(); |
| C1 c12 = C1<A>(); |
| C1 c13 = C1<B>(); |
| C1 c14 = C1<C>(); |
| |
| C2 c21 = C2(); |
| C2 c22 = C2<A>(); //# 01: compile-time error |
| C2 c23 = C2<B>(); |
| C2 c24 = C2<C>(); |
| |
| C3 c31 = C3(); |
| C3 c32 = C3<A>(); //# 02: compile-time error |
| C3 c33 = C3<B>(); //# 03: compile-time error |
| C3 c34 = C3<C>(); |
| } |