1/*
2 * Copyright (c) 2003, 2015, 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 4916607
27 * @summary Test casts (warning)
28 * @author gafter
29 *
30 * @compile/ref=CastWarn.out -XDrawDiagnostics -Xlint:unchecked CastWarn.java
31 */
32
33import java.util.*;
34
35class CastWarn {
36
37    // --- Disjoint ---
38
39    private interface DA<T> { }
40    private interface DB<T> extends DA<T> { }
41    private interface DC<T> extends DA<Integer> { }
42
43    private <N extends Number, I extends Integer, R extends Runnable, S extends String> void disjointness() {
44        Object o;
45
46        // Classes
47        o = (DA<? extends Runnable>) (DA<? extends Number>) null; // <<warn 2>>
48        o = (DA<? super Integer>) (DA<? extends Number>) null; // <<warn 3>>
49        o = (DA<? super String>) (DA<? super Number>) null; // <<warn 4>>
50
51        // Typevars
52        o = (DA<? extends Integer>) (DA<N>) null; // <<warn 5>>
53        o = (DA<I>) (DA<? extends Number>) null; // <<warn 6>>
54        o = (DA<N>) (DA<? extends Integer>) null; // <<warn 7>>
55        o = (DA<N>) (DA<? extends Runnable>) null; // <<warn 8>>
56
57        o = (DA<N>) (DA<I>) null; // <<warn 9>>
58        o = (DA<N>) (DA<R>) null; // <<warn 10>>
59
60        // Raw (asymmetrical!)
61        o = (DA<Number>) (DB) null; // <<warn 11>>
62        o = (DA<? extends Number>) (DB) null; // <<warn 12>>
63        o = (DB<Number>) (DA) null; // <<warn 13>>
64        o = (DB<? extends Number>) (DA) null; // <<warn 14>>
65    }
66}
67