1/*
2 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 4698375
27 * @summary generics: subtyping problem when type parameters permuted
28 * @author gafter
29 *
30 * @compile  PermuteBound.java
31 */
32
33package PermuteBound;
34
35class C<X, Y> {}
36
37class D<X, Y> extends C<X, Y>
38{
39    void f(C<X, Y> c)
40    {
41        D<X, Y> d = (D<X, Y>) c;// OK because D extends C
42    }
43
44    void g(C<Y, X> c)// parameters X and Y are now permuted
45    {
46        D<Y, X> d = (D<Y, X>) c;// should also be OK but is not !?
47        //                    ^
48        // inconvertible types
49        // found :    C<Y,X>
50        // required : D<Y,X>
51    }
52    /*
53    void gWorkAround(C<Y, X> c)// but generates unchecked warning
54    {
55        D<Y, X> d = (D) ((C) c);
56    }
57    */
58}
59