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 8214529 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 new ExpressionSwitchBugs().testAnonymousClasses(); 36 } 37 38 private void testNested() { 39 int i = 0; 40 check(42, id(switch (42) { 41 default: i++; break 42; 42 })); 43 i = 0; 44 check(43, id(switch (42) { 45 case 42: while (i == 0) { 46 i++; 47 } 48 break 42 + i; 49 default: i++; break 42; 50 })); 51 i = 0; 52 check(42, id(switch (42) { 53 case 42: if (i == 0) { 54 break 42; 55 } 56 default: i++; break 43; 57 })); 58 i = 0; 59 check(42, id(switch (42) { 60 case 42: if (i == 0) { 61 break 41 + switch (0) { 62 case 0 -> 1; 63 default -> -1; 64 }; 65 } 66 default: i++; break 43; 67 })); 68 } 69 70 private void testAnonymousClasses() { 71 for (int i : new int[] {1, 2}) { 72 check(3, id((switch (i) { 73 case 1: break new I() { 74 public int g() { return 3; } 75 }; 76 default: break (I) () -> { return 3; }; 77 }).g())); 78 check(3, id((switch (i) { 79 case 1 -> new I() { 80 public int g() { return 3; } 81 }; 82 default -> (I) () -> { return 3; }; 83 }).g())); 84 } 85 } 86 87 private int id(int i) { 88 return i; 89 } 90 91 private int id(Object o) { 92 return -1; 93 } 94 95 private void check(int actual, int expected) { 96 if (actual != expected) { 97 throw new AssertionError("Unexpected result: " + actual); 98 } 99 } 100 101 public interface I { 102 public int g(); 103 } 104 }