1 /*
   2  * Copyright (c) 2017, 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  * @compile --enable-preview -source 12 ExpressionSwitchBreaks1.java
  28  * @run main/othervm --enable-preview ExpressionSwitchBreaks1
  29  */
  30 
  31 import java.util.Objects;
  32 import java.util.function.Supplier;
  33 
  34 public class ExpressionSwitchBreaks1 {
  35     public static void main(String... args) {
  36         new ExpressionSwitchBreaks1().run();
  37     }
  38 
  39     private void run() {
  40         check(print1(0, 0), "0-0");
  41         check(print1(0, 1), "0-1");
  42         check(print1(0, -1), "0-X");
  43         check(print1(-1, -1), "X");
  44         check(print2(0, 0, 0), "0-0-0");
  45         check(print2(0, 0, 1), "0-0-1");
  46         check(print2(0, 0, 2), "0-0-2");
  47         check(print2(0, 0, -1), "0-0-X");
  48         check(print2(0, 1, -1), "0-1");
  49         check(print2(0, -1, -1), "0-X");
  50         check(print2(1, -1, -1), "1");
  51         check(print2(2, 5, 5), "2-X-5");
  52         check(print2(-11, -1, -1), "X");
  53     }
  54 
  55     private String print1(int i, int j) {
  56         switch (i) {
  57             case 0:
  58                 return switch (j) {
  59                     case 0:
  60                         if (true) break "0-0";
  61                     case 1:
  62                         break "0-1";
  63                     default:
  64                         break "0-X";
  65                 };
  66             default: return "X";
  67         }
  68     }
  69 
  70     private String print2(int i, int j, int k) {
  71         return switch (i) {
  72             case 0:
  73                 String r;
  74                 OUTER: switch (j) {
  75                     case 0:
  76                         String res;
  77                         INNER: switch (k) {
  78                             case 0: res = "0-0-0"; break;
  79                             case 1: res = "0-0-1"; break;
  80                             case 2: res = "0-0-2"; break INNER;
  81                             default: r = "0-0-X"; break OUTER;
  82                         }
  83                         r = res;
  84                         break;
  85                     case 1:
  86                         r = "0-1";
  87                         break;
  88                     default:
  89                         r = "0-X";
  90                         break;
  91                 }
  92                 break r;
  93             case 1:
  94                 break "1";
  95             case 2:
  96                 LOP: while (j-- > 0) {
  97                     if (k == 5) {
  98                         k--;
  99                         continue;
 100                     }
 101                     break LOP;
 102                 }
 103                 Supplier<String> getter = () -> { return "2-X-5"; };
 104                 break getter.get();
 105             default:
 106                 break "X";
 107         };
 108     }
 109 
 110     private void check(String result, String expected) {
 111         if (!Objects.equals(result, expected)) {
 112             throw new AssertionError("Unexpected result: " + result);
 113         }
 114     }
 115 
 116     enum T {
 117         A, B;
 118     }
 119 }