include/cdio++ Add pre- and post- increment/decrement operators for

libcdio enums that it makes sense to iterate over.

example/C++/OO/*: use these
example/*: match up C and C++ programs better.

include/cdio++/enum.hpp

@@ -0,0 +1,50 @@
+/* -*- C++ -*-
+    $Id: enum.hpp,v 1.1 2005/11/11 12:26:57 rocky Exp $
+
+    Copyright (C) 2005 Rocky Bernstein <rocky@panix.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/** \file enum.hpp
+ *
+ *  \brief C++ header for pre- and post-increment operators for 
+ *  enumerations defined in libcdio that it makes sense to iterate over.
+ */
+
+#define ENUM_ITERATE_FNS(type)			\
+  inline					\
+  type &operator++(type &t)			\
+  {						\
+    return t = type(t + 1);			\
+  }						\
+  inline					\
+  type  &operator++(type &t, int)		\
+  {						\
+    return t = type(t + 1);			\
+  }						\
+  inline					\
+  type &operator--(type &t)			\
+  {						\
+    return t = type(t - 1);			\
+  }						\
+  inline					\
+  type  &operator--(type &t, int)		\
+  {						\
+    return t = type(t - 1);			\
+  }
+
+ENUM_ITERATE_FNS(cdtext_field_t)
+ENUM_ITERATE_FNS(driver_id_t)