| // 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)* ‘>’ |
| /// ... |
| /// If no extends clause is present, the upper bound is Object. |
| /// @description Checks that the upper bound is [Object] if [extends] clause is |
| /// absent. |
| /// @author iarkh@unipro.ru |
| |
| |
| class A {} |
| class B extends A {} |
| class C extends B {} |
| |
| class D<T> {} |
| |
| typedef Alias<T> = void Function(T); |
| |
| main() { |
| Alias a1; |
| Alias<A> a2; |
| Alias<B> a3; |
| Alias<C> a4; |
| Alias<Object> a5; |
| } |
