1 /* 2 * Copyright (c) 2018, 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 8206986 27 * @summary Verify various corner cases with nested switch expressions. 28 * @compile --enable-preview -source 12 ExpressionSwitchBugs.java 29 * @run main/othervm --enable-preview ExpressionSwitchBugs 30 */ 31 32 public class ExpressionSwitchBugs { 33 public static void main(String... args) { 34 new ExpressionSwitchBugs().testNested(); 35 } 36 37 private void testNested() { 38 int i = 0; 39 check(42, id(switch (42) { 40 default: i++; break 42; 41 })); 42 i = 0; 43 check(43, id(switch (42) { 44 case 42: while (i == 0) { 45 i++; 46 } 47 break 42 + i; 48 default: i++; break 42; 49 })); 50 i = 0; 51 check(42, id(switch (42) { 52 case 42: if (i == 0) { 53 break 42; 54 } 55 default: i++; break 43; 56 })); 57 i = 0; 58 check(42, id(switch (42) { 59 case 42: if (i == 0) { 60 break 41 + switch (0) { 61 case 0 -> 1; 62 default -> -1; 63 }; 64 } 65 default: i++; break 43; 66 })); 67 } 68 69 private int id(int i) { 70 return i; 71 } 72 73 private int id(Object o) { 74 return -1; 75 } 76 77 private void check(int actual, int expected) { 78 if (actual != expected) { 79 throw new AssertionError("Unexpected result: " + actual); 80 } 81 } 82 }