| // 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> = D<T>; |
| |
| main() { |
| D d1 = Alias(); |
| D d2 = Alias<A>(); |
| D d3 = Alias<B>(); |
| D d4 = Alias<C>(); |
| D d5 = Alias<Object>(); |
| } |
