1 /*
 2  * Copyright (c) 2021, 2024, 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 lambda type conversion of value class
27  * @enablePreview
28  * @run junit/othervm LambdaConversion
29  */
30 
31 import java.util.function.ToIntFunction;
32 
33 import org.junit.jupiter.api.Test;
34 import static org.junit.jupiter.api.Assertions.*;
35 
36 public class LambdaConversion {
37 
38     static class c_int { }
39     static value class Pointer<X> {
40         long addr;
41 
42         public Pointer(long addr) {
43             this.addr = addr;
44         }
45 
46         long address() { return addr; }
47     }
48 
49     @Test
50     public static void test() {
51         Pointer<c_int> p_int = new Pointer<>(12);
52         assertTrue(doAction(p_int, LambdaConversion::one) == 1);
53         assertTrue(doAction(p_int, LambdaConversion::two) == 2);
54     }
55 
56     static <Z> int doAction(Pointer<Z> pointer, ToIntFunction<Pointer<Z>> action) {
57         return action.applyAsInt(pointer);
58     }
59 
60     static int one(Pointer<c_int> pointer) {
61         return 1;
62     }
63 
64     static int two(Pointer<c_int> p_int) {
65         return 2;
66     }
67 }
68