SubtypeCaptureLeak.java revision 2830:414b82835861 
1/*
2 * Copyright (c) 2014, 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 8039214
27 * @summary Capture variables used for subtyping should not leak out of inference
28 * @compile SubtypeCaptureLeak.java
29 */
30
31public class SubtypeCaptureLeak {
32
33    interface Parent<T> {}
34    interface Child<T> extends Parent<T> {}
35    interface Box<T> {}
36    interface SubBox<T> extends Box<T> {}
37
38    // applicability inference
39
40    <T> void m1(Parent<? extends T> arg) {}
41
42    void testApplicable(Child<?> arg) {
43        m1(arg);
44    }
45
46    // applicability inference, nested
47
48    <T> void m2(Box<? extends Parent<? extends T>> arg) {}
49
50    void testApplicable(Box<Child<?>> arg) {
51        m2(arg);
52    }
53
54    // most specific inference
55
56    <T> void m3(Parent<? extends T> arg) {}
57    void m3(Child<?> arg) {}
58
59    void testMostSpecific(Child<?> arg) {
60        m3(arg);
61    }
62
63    // most specific inference, nested
64
65    <T> void m4(Box<? extends Parent<? extends T>> arg) {}
66    void m4(SubBox<Child<?>> arg) {}
67
68    void testMostSpecificNested(SubBox<Child<?>> arg) {
69        m4(arg);
70    }
71
72}
73