[java] value breaks: basic highlighting (IDEA-196643)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting12/EnhancedSwitchUnreachable.java

@@ -101,8 +101,8 @@ class C {
     int n;
     return 2;
     n = <error descr="Unreachable statement">switch</error>(s) {
-      case "a": n= 1;break;
-      default: n= 0;
+      case "a": n = 1; break 1;
+      default: n = 0; break 0;
     };
   }
 

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting12/SwitchExpressions.java

@@ -12,7 +12,7 @@ class SwitchExpressions {
 
     System.out.println(switch (new Random().nextInt()) {
       case 0 -> throw new IllegalStateException("no args");
-      <error descr="Different case kinds used in the switch">case 1:</error> break;
+      <error descr="Different case kinds used in the switch">case 1:</error> break "lone";
     });
 
     System.out.println(
@@ -44,5 +44,18 @@ class SwitchExpressions {
       case E1 -> 1;
       case E2 -> 2;
     });
+
+    lab: while (true) {
+      switch (new Random().nextInt()) {
+        case -1: return;
+        case -2: continue lab;
+        default: break lab;
+      }
+      System.out.println(switch (new Random().nextInt()) {
+        case -1: <error descr="Return outside of enclosing switch expression">return;</error>
+        case -2: <error descr="Continue outside of enclosing switch expression">continue lab;</error>
+        default: <error descr="Break outside of enclosing switch expression">break lab;</error>
+      });
+    }
   }
 }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting12/ValueBreaks.java

@@ -0,0 +1,39 @@
+class ValueBreaks {
+  static final int ref = -1;
+
+  void m() {
+    l1: break l1;
+
+    <error descr="Break outside switch or loop">break;</error>
+    break <error descr="Undefined label: 'wtf'">wtf</error>;
+    <error descr="Value break outside switch expression">break 42;</error>
+
+    switch (0) {
+      case 0: <error descr="Value break outside switch expression">break 42;</error>
+      case 1: break <error descr="Undefined label: 'ref'">ref</error>;
+      case 2: break <error descr="Undefined label: 'wtf'">wtf</error>;
+      case 3: ref: break ref;
+    };
+
+    sink(switch (0) {
+      case 0 -> { while (true) <error descr="Value break outside switch expression">break 42;</error> }
+      case 1 -> { while (true) break <error descr="Undefined label: 'ref'">ref</error>; }
+      case 2 -> { while (true) break <error descr="Undefined label: 'wtf'">wtf</error>; }
+      case 3 -> { break ref; }
+      case 4 -> { break <error descr="Cannot resolve symbol 'wtf'">wtf</error>; }
+      default -> throw new RuntimeException();
+    });
+
+    ref: sink(switch (0) {
+      default: break <error descr="Reference to 'ref' is ambiguous, both 'ref:' and 'ValueBreaks.ref' match">ref</error>;
+    });
+
+    while (true) {
+      sink(switch (0) {
+        default: <error descr="Missing break value">break;</error>
+      });
+    }
+  }
+
+  private static void sink(Object o) { }
+}