Who'd have guessed that:

boolean xor not boolean
is equivalent to:
 boolean == boolean?

Added a comment as well so Peter will be my friend again!


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@277544 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/ComponentHelper.java

@@ -583,7 +583,8 @@ public class ComponentHelper  {
     private boolean sameDefinition(
         AntTypeDefinition def, AntTypeDefinition old) {
         boolean defValid = validDefinition(def);
-        boolean sameValidity = defValid ^ !validDefinition(old);
+        boolean sameValidity = (defValid == validDefinition(old));
+        //must have same validity; then if they are valid they must also be the same:
         return sameValidity && (!defValid || def.sameDefinition(old, project));
     }