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+
+// (C) Copyright Edward Diener 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_IS_VMD_TUPLE_HPP)
+#define BOOST_VMD_IS_VMD_TUPLE_HPP
+
+#include <boost/vmd/detail/setup.hpp>
+
+#if BOOST_PP_VARIADICS
+
+#include <boost/preprocessor/control/iif.hpp>
+#include <boost/vmd/identity.hpp>
+#include <boost/vmd/is_empty.hpp>
+#include <boost/vmd/is_tuple.hpp>
+
+/*
+
+ The succeeding comments in this file are in doxygen format.
+
+*/
+
+/** \file
+*/
+
+/** \def BOOST_VMD_IS_VMD_TUPLE(sequence)
+
+ \brief Determines if a sequence is a VMD tuple.
+
+ The macro checks that the sequence is a VMD tuple.
+ A VMD tuple, which may be a Boost PP tuple or emptiness, is a superset of a Boost PP tuple.
+ It returns 1 if it is a VMD tuple, else if returns 0.
+
+ sequence = a possible Boost PP tuple
+
+ returns = 1 if it a VMD tuple, else returns 0.
+
+*/
+
+#define BOOST_VMD_IS_VMD_TUPLE(sequence) \
+ BOOST_VMD_IDENTITY_RESULT \
+ ( \
+ BOOST_PP_IIF \
+ ( \
+ BOOST_VMD_IS_EMPTY(sequence), \
+ BOOST_VMD_IDENTITY(1), \
+ BOOST_VMD_IS_TUPLE \
+ ) \
+ (sequence) \
+ ) \
+/**/
+
+#endif /* BOOST_PP_VARIADICS */
+#endif /* BOOST_VMD_IS_VMD_TUPLE_HPP */