ObjFW  Diff

 * \param end The index where the substring ends.
 *	      This points BEHIND the last character!
 * \return The substring as a new autoreleased OFString
 */
- (OFString*)substringFromIndex: (size_t)start
			toIndex: (size_t)end;

/**
 * \param range The range of the substring
 * \return The substring as a new autoreleased OFString
 */
- (OFString*)substringWithRange: (of_range_t)range;

/**
 * Creates a new string by appending another string.
 *
 * \param str The string to append
 * \return A new autoreleased OFString with the specified string appended
 */
- (OFString*)stringByAppendingString: (OFString*)str;