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 * @summary Test subtyping for wildcards with related type bounds.
27 *
28 * @compile/fail/ref=AssignmentDifferentTypes.out -XDrawDiagnostics AssignmentDifferentTypes.java
29 */
30
31public class AssignmentDifferentTypes {
32
33    public static void main(String[] args) {
34        Ref<Der> derexact = null;
35        Ref<Base> baseexact = null;
36        Ref<? extends Der> derext = null;
37        Ref<? extends Base> baseext = null;
38        Ref<? super Der> dersuper = null;
39        Ref<? super Base> basesuper = null;
40
41        baseext = derext;       // <<pass>> <? extends Base> = <? extends Der>
42        baseext = derexact;     // <<pass>> <? extends Base> = <Der>
43        dersuper = basesuper;   // <<pass>> <? super Der> = <? super Base>
44        dersuper = baseexact;   // <<pass>> <? super Der> = <Base>
45
46        derexact = baseexact;   // <<fail>> <Der> = <Base>
47        baseexact = derexact;   // <<fail>> <Base> = <Der>
48        derext = baseext;       // <<fail>> <? extends Der> = <? extends Base>
49        derext = baseexact;     // <<fail>> <? extends Der> = <Base>
50        derext = basesuper;     // <<fail>> <? extends Der> = <? super Base>
51        baseext = dersuper;     // <<fail>> <? extends Base> = <? super Der>
52        basesuper = dersuper;   // <<fail>> <? super Base> = <? super Der>
53        basesuper = derexact;   // <<fail>> <? super Base> = <Der>
54    }
55}
56
57class Ref<T> {}
58class Base {}
59class Der extends Base {}
60