@@ -23,10 +23,16 @@
  * @class OFCharacterSet OFCharacterSet.h ObjFW/OFCharacterSet.h
  *
  * @brief A class cluster representing a character set.
  */
 @interface OFCharacterSet: OFObject
+/*!
+ * The inverted set, containing only the characters that do not exist in the
+ * receiver.
+ */
+@property (readonly, nonatomic) OFCharacterSet *invertedSet;
+
 /*!
  * @brief Creates a new character set containing the characters of the
  *	  specified string.
  *
  * @param characters The characters for the character set