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