| /* |
| * 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 typedef type variable is a |
| * supertype of its upper bound. |
| * @author iarkh@unipro.ru |
| */ |
| |
| typedef Alias1<X extends X> = void Function(X); |
| // ^^^^^^^^^^^ |
| // [analyzer] COMPILE_TIME_ERROR.TYPE_PARAMETER_SUPERTYPE_OF_ITS_BOUND |
| // [cfe] Type 'X' can't use itself as a bound. |
| typedef Alias2<X extends Y, Y extends X> = void Function(X, Y); |
| // [error line 24, column 0] |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| typedef Alias3<X extends Y, Y extends Z, Z extends X> = void Function(X, Y, Z); |
| // [error line 28, column 0] |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| main() {} |
