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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


#include <boost/vmd/detail/setup.hpp>


#include <boost/preprocessor/control/iif.hpp>
#include <boost/preprocessor/tuple/size.hpp>
#include <boost/vmd/identity.hpp>
#include <boost/vmd/is_empty.hpp>


  The succeeding comments in this file are in doxygen format.


/** \file

/** \def BOOST_VMD_TUPLE_SIZE(tuple)

    \brief  expands to the size of the tuple passed to it. 

    tuple = tuple whose size is to be extracted. 
    If the tuple is an empty tuple its size is 0.
    Otherwise the result is the number of elements in the tuple.

#define BOOST_VMD_TUPLE_SIZE(tuple) \
        ( \
        BOOST_PP_IIF \
            ( \
            BOOST_VMD_IS_EMPTY(tuple), \
            BOOST_VMD_IDENTITY(0), \
            BOOST_PP_TUPLE_SIZE \
            ) \
        (tuple) \
        ) \