1 files changed, 41 insertions, 0 deletions
diff --git a/boost/vmd/empty.hpp b/boost/vmd/empty.hpp
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+++ b/boost/vmd/empty.hpp
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+
+//  (C) Copyright Edward Diener 2011-2015
+//  Use, modification and distribution are subject to the Boost Software License,
+//  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt).
+
+#if !defined(BOOST_VMD_EMPTY_HPP)
+#define BOOST_VMD_EMPTY_HPP
+
+#include <boost/vmd/detail/setup.hpp>
+
+#if BOOST_PP_VARIADICS
+
+/*
+
+  The succeeding comments in this file are in doxygen format.
+
+*/
+
+/** \file
+*/
+
+/** \def BOOST_VMD_EMPTY(...)
+
+    \brief Outputs emptiness.
+
+    ... = any variadic parameters. The parameters are ignored.
+    
+    This macro is used to output emptiness ( nothing ) no matter
+    what is passed to it.
+    
+    If you use this macro to return a result, as in 'result BOOST_VMD_EMPTY'
+    subsequently invoked, you should surround the result with 
+    BOOST_VMD_IDENTITY_RESULT to smooth over a VC++ problem.
+    
+*/
+    
+#define BOOST_VMD_EMPTY(...)
+
+#endif /* BOOST_PP_VARIADICS */
+#endif /* BOOST_VMD_EMPTY_HPP */