src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Lower.java

rev 51291 : imported patch switch
rev 51292 : [mq]: switch.02

*** 3364,3373 ****
--- 3364,3378 ----
                  case 0: //default
                  case 1: //single label
                      cases.append(c);
                      break;
                  default: //multiple labels, expand:
+                     //case C1, C2, C3: ...
+                     //=>
+                     //case C1:
+                     //case C2:
+                     //case C3: ...
                      List<JCExpression> patterns = c.pats;
                      while (patterns.tail.nonEmpty()) {
                          cases.append(make_at(c.pos()).Case(JCCase.STATEMENT,
                                                             List.of(patterns.head),
                                                             List.nil(),
*** 3616,3625 ****
--- 3621,3642 ----
          }
      }
  
      @Override
      public void visitSwitchExpression(JCSwitchExpression tree) {
+         //translates switch expression to statement switch:
+         //switch (selector) {
+         //    case C: break value;
+         //    ...
+         //}
+         //=>
+         //(letexpr T exprswitch$;
+         //         switch (selector) {
+         //             case C: { exprswitch$ = value; break; }
+         //         }
+         //         exprswitch$
+         //)
          VarSymbol dollar_switchexpr = new VarSymbol(Flags.FINAL|Flags.SYNTHETIC,
                             names.fromString("exprswitch" + tree.pos + target.syntheticNameChar()),
                             tree.type,
                             currentMethodSym);