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 8048121
27 * @summary javac complex method references: revamp and simplify
28 *
29 * Make sure that the method reference receiver is evaluated exactly once
30 * even in this bridging case.
31 */
32
33 public class MethodRefSingleRefEvalBridge {
34
35    interface SAM {
36       int m();
37    }
38
39    class ZZ {
40        // private to force bridging
41        private int four() { return 4; }
42    }
43
44    static int count = 0;
45    ZZ azz = new ZZ();
46
47    static void assertEqual(int expected, int got) {
48        if (got != expected)
49            throw new AssertionError("Expected " + expected + " got " + got);
50    }
51
52    public static void main(String[] args) {
53       new MethodRefSingleRefEvalBridge().test();
54    }
55
56    ZZ check() {
57        count++;
58        return azz;
59    }
60
61    void test() {
62       count = 0;
63       SAM s = check()::four;
64       assertEqual(1, count);
65
66       count = 0;
67       assertEqual(4, s.m());
68       assertEqual(0, count);
69    }
70}
71