initial checkin

[SVN r11780]

include/boost/preprocessor/comma_if.hpp

@@ -0,0 +1,32 @@
+#ifndef BOOST_PREPROCESSOR_COMMA_IF_HPP
+#define BOOST_PREPROCESSOR_COMMA_IF_HPP
+
+//  Copyright (C) 2001
+//  Housemarque, Inc.
+//  http://www.housemarque.com
+//  
+//  Permission to copy, use, modify, sell and distribute this software is
+//  granted provided this copyright notice appears in all copies. This
+//  software is provided "as is" without express or implied warranty, and
+//  with no claim as to its suitability for any purpose.
+
+//  See http://www.boost.org for most recent version.
+
+/*! \file
+
+<a href="../../../../boost/preprocessor/comma_if.hpp">Click here to see the header.</a>
+*/
+
+#ifndef BOOST_PREPROCESSOR_COMMA_HPP
+#  include <boost/preprocessor/comma.hpp>
+#endif
+#ifndef BOOST_PREPROCESSOR_EMPTY_HPP
+#  include <boost/preprocessor/empty.hpp>
+#endif
+#ifndef BOOST_PREPROCESSOR_IF_HPP
+#  include <boost/preprocessor/if.hpp>
+#endif
+
+//! Expands to a comma if C != 0 and nothing if C == 0.
+#define BOOST_PREPROCESSOR_COMMA_IF(C) BOOST_PREPROCESSOR_IF(C,BOOST_PREPROCESSOR_COMMA,BOOST_PREPROCESSOR_EMPTY)()
+#endif