| /* |
| * 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)* ‘>’ |
| * ... |
| * It is a compile-time error if a type parameter is a supertype of its upper |
| * bound when that upper bound is itself a type variable. |
| * This prevents circular declarations like [X extends X] and [X extends Y, Y |
| * extends X]. |
| * @description Checks that it is a compile error if class type variable is a |
| * supertype of its upper bound. |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=nonfunction-type-aliases |
| |
| class A<T1> {} |
| class B<T1, T2> {} |
| class C<T1, T2, T3> {} |
| |
| typedef G1<X extends X> = A<X>; //# 01: compile-time error |
| typedef G2<X extends Y, Y extends X> = B<X, Y>; //# 02: compile-time error |
| typedef G3<X extends Y, Y extends Z, Z extends X> = C<X, Y, Z>; //# 03: compile-time error |
| |
| main() {} |
