A number of macros are helper versions of each of the parsing Boost PP data type macros. All of them take as a parameter the v-sequence to parse.

These macros are:

BOOST_VMD_BEGIN_ARRAY: BOOST_VMD_BEGIN_LIST: BOOST_VMD_BEGIN_SEQ: BOOST_VMD_BEGIN_TUPLE:

expands to the appropriate beginning Boost PP data type or nothing if the appropriate beginning Boost PP data type is not found.

BOOST_VMD_AFTER_ARRAY: BOOST_VMD_AFTER_LIST: BOOST_VMD_AFTER_SEQ: BOOST_VMD_AFTER_TUPLE:

expands to the preprocessor tokens after the beginning appropriate Boost PP data type. If the beginning Boost PP data type is not found, expands to nothing.

BOOST_VMD_IS_BEGIN_ARRAY: BOOST_VMD_IS_BEGIN_LIST: BOOST_VMD_IS_BEGIN_SEQ: BOOST_VMD_IS_BEGIN_TUPLE:

expands to 1 if input begins with the appropriate Boost PP data type, else expands to 0 if it does not.

Usage

In order to use any of the macros you can include the general header:

#include <boost/vmd/vmd.hpp>

or include the appropriate specific header:

#include <boost/vmd/array.hpp>
#include <boost/vmd/list.hpp>
#include <boost/vmd/seq.hpp>
#include <boost/vmd/tuple.hpp>