initial checkin

[SVN r11780]

include/boost/preprocessor/if.hpp

@@ -0,0 +1,37 @@
+#ifndef BOOST_PREPROCESSOR_IF_HPP
+#define BOOST_PREPROCESSOR_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/if.hpp">Click here to see the header.</a>
+*/
+
+#ifndef BOOST_PREPROCESSOR_LOGICAL_BOOL_HPP
+#  include <boost/preprocessor/logical/bool.hpp>
+#endif
+
+//! Expands to T if C != 0 and E if C == 0.
+/*!
+BOOST_PREPROCESSOR_IF() enables convenient generation of lists using
+BOOST_PREPROCESSOR_REPEAT().
+*/
+#define BOOST_PREPROCESSOR_IF(C,T,E) BOOST_PREPROCESSOR_IF_BOOL(BOOST_PREPROCESSOR_BOOL(C),T,E)
+
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
+#define BOOST_PREPROCESSOR_IF_BOOL(C,T,E) BOOST_PREPROCESSOR_IF_BOOL_DELAY(C,T,E)
+#define BOOST_PREPROCESSOR_IF_BOOL_DELAY(C,T,E) BOOST_PREPROCESSOR_IF_BOOL##C(T,E)
+#define BOOST_PREPROCESSOR_IF_BOOL0(T,E) E
+#define BOOST_PREPROCESSOR_IF_BOOL1(T,E) T
+#endif /* DOXYGEN_SHOULD_SKIP_THIS */
+#endif