customized failed rules behaviour

src/main/java/carpet/settings/ParsedRule.java

@@ -163,7 +163,7 @@ public final class ParsedRule<T> implements Comparable<ParsedRule> {
                 {
                     if (source != null)
                     {
-                        Messenger.m(source, "r Wrong value for " + name + ": " + stringValue);
+                        validator.notifyFailure(source, this, stringValue);
                         if (validator.description() != null)
                             Messenger.m(source, "r " + validator.description());
                     }

src/main/java/carpet/settings/Validator.java

@@ -16,6 +16,10 @@ public abstract class Validator<T>
      */
     public abstract T validate(ServerCommandSource source, ParsedRule<T> currentRule, T newValue, String string);
     public String description() {return null;}
+    public void notifyFailure(ServerCommandSource source, ParsedRule<T> currentRule, String providedValue)
+    {
+        Messenger.m(source, "r Wrong value for " + currentRule.name + ": " + providedValue);
+    }
 
     public static class _COMMAND<T> extends Validator<T>
     {