diff options
Diffstat (limited to 'boost/vmd/seq/is_vmd_seq.hpp')
-rw-r--r-- | boost/vmd/seq/is_vmd_seq.hpp | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/boost/vmd/seq/is_vmd_seq.hpp b/boost/vmd/seq/is_vmd_seq.hpp new file mode 100644 index 0000000000..38648d2fd0 --- /dev/null +++ b/boost/vmd/seq/is_vmd_seq.hpp @@ -0,0 +1,56 @@ + +// (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_SEQ_HPP) +#define BOOST_VMD_IS_VMD_SEQ_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_seq.hpp> + +/* + + The succeeding comments in this file are in doxygen format. + +*/ + +/** \file +*/ + +/** \def BOOST_VMD_IS_VMD_SEQ(sequence) + + \brief Determines if a sequence is a VMD seq. + + The macro checks that the sequence is a VMD seq. + A VMD seq, which may be a Boost PP seq or emptiness, is a superset of a Boost PP seq. + It returns 1 if it is a VMD seq, else if returns 0. + + sequence = a possible Boost PP seq + + returns = 1 if it a VMD seq, else returns 0. + +*/ + +#define BOOST_VMD_IS_VMD_SEQ(sequence) \ + BOOST_VMD_IDENTITY_RESULT \ + ( \ + BOOST_PP_IIF \ + ( \ + BOOST_VMD_IS_EMPTY(sequence), \ + BOOST_VMD_IDENTITY(1), \ + BOOST_VMD_IS_SEQ \ + ) \ + (sequence) \ + ) \ +/**/ + +#endif /* BOOST_PP_VARIADICS */ +#endif /* BOOST_VMD_IS_VMD_SEQ_HPP */ |