duke@1: /*
ohair@798:  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
duke@1:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1:  *
duke@1:  * This code is free software; you can redistribute it and/or modify it
duke@1:  * under the terms of the GNU General Public License version 2 only, as
duke@1:  * published by the Free Software Foundation.
duke@1:  *
duke@1:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@1:  * version 2 for more details (a copy is included in the LICENSE file that
duke@1:  * accompanied this code).
duke@1:  *
duke@1:  * You should have received a copy of the GNU General Public License version
duke@1:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@1:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1:  *
ohair@554:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@554:  * or visit www.oracle.com if you need additional information or have any
ohair@554:  * questions.
duke@1:  */
duke@1: 
duke@1: /*
duke@1:  * @test
duke@1:  * @bug 4698375
duke@1:  * @summary generics: subtyping problem when type parameters permuted
duke@1:  * @author gafter
duke@1:  *
darcy@289:  * @compile  PermuteBound.java
duke@1:  */
duke@1: 
jjg@514: package PermuteBound;
duke@1: 
duke@1: class C<X, Y> {}
duke@1: 
duke@1: class D<X, Y> extends C<X, Y>
duke@1: {
duke@1:     void f(C<X, Y> c)
duke@1:     {
duke@1:         D<X, Y> d = (D<X, Y>) c;// OK because D extends C
duke@1:     }
duke@1: 
duke@1:     void g(C<Y, X> c)// parameters X and Y are now permuted
duke@1:     {
duke@1:         D<Y, X> d = (D<Y, X>) c;// should also be OK but is not !?
duke@1:         //                    ^
duke@1:         // inconvertible types
duke@1:         // found :    C<Y,X>
duke@1:         // required : D<Y,X>
duke@1:     }
duke@1:     /*
duke@1:     void gWorkAround(C<Y, X> c)// but generates unchecked warning
duke@1:     {
duke@1:         D<Y, X> d = (D) ((C) c);
duke@1:     }
duke@1:     */
duke@1: }