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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_IS_EMPTY_LIST_HPP)
+#define BOOST_VMD_IS_EMPTY_LIST_HPP
+
+#include <boost/vmd/detail/setup.hpp>
+
+#if BOOST_PP_VARIADICS
+
+#include <boost/vmd/detail/is_list.hpp>
+
+/*
+
+ The succeeding comments in this file are in doxygen format.
+
+*/
+
+/** \file
+*/
+
+/** \def BOOST_VMD_IS_EMPTY_LIST(sequence)
+
+ \brief Tests whether a sequence is an empty Boost PP list.
+
+ An empty Boost PP list consists of the single identifier 'BOOST_PP_NIL'.
+ This identifier also serves as a list terminator for a non-empty list.
+
+ sequence = a preprocessor parameter
+
+ returns = 1 if the sequence is an empty Boost PP list
+ 0 if it is not.
+
+ The macro will generate a preprocessing error if the input
+ as an empty list marker, instead of being an identifier, is
+ a preprocessor token which VMD cannot parse, as in the
+ example '&BOOST_PP_NIL'.
+
+*/
+
+#define BOOST_VMD_IS_EMPTY_LIST(sequence) \
+ BOOST_VMD_DETAIL_IS_LIST_IS_EMPTY_LIST_PROCESS(sequence) \
+/**/
+
+/** \def BOOST_VMD_IS_EMPTY_LIST_D(d,sequence)
+
+ \brief Tests whether a sequence is an empty Boost PP list. Re-entrant version.
+
+ An empty Boost PP list consists of the single identifier 'BOOST_PP_NIL'.
+ This identifier also serves as a list terminator for a non-empty list.
+
+ d = The next available BOOST_PP_WHILE iteration
+ sequence = a preprocessor parameter
+
+ returns = 1 if the sequence is an empty Boost PP list
+ 0 if it is not.
+
+ The macro will generate a preprocessing error if the input
+ as an empty list marker, instead of being an identifier, is
+ a preprocessor token which VMD cannot parse, as in the
+ example '&BOOST_PP_NIL'.
+
+*/
+
+#define BOOST_VMD_IS_EMPTY_LIST_D(d,sequence) \
+ BOOST_VMD_DETAIL_IS_LIST_IS_EMPTY_LIST_PROCESS_D(d,sequence) \
+/**/
+
+#endif /* BOOST_PP_VARIADICS */
+#endif /* BOOST_VMD_IS_EMPTY_LIST_HPP */