| /* |
| * 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 function type variable is a |
| * supertype of its upper bound. |
| * @author iarkh@unipro.ru |
| */ |
| |
| void func1<X extends X>(X) {} //# 01: compile-time error |
| void func2<X extends Y, Y extends X>(X, Y) {} //# 02: compile-time error |
| void func3<X extends Y, Y extends Z, Z extends X>(X, Y, Z) {} //# 03: compile-time error |
| |
| main() {} |
