boost/vmd/tuple/to_array.hpp
// (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_TUPLE_TO_ARRAY_HPP)
#define BOOST_VMD_TUPLE_TO_ARRAY_HPP
#include <boost/vmd/detail/setup.hpp>
#if BOOST_PP_VARIADICS
#include <boost/preprocessor/control/iif.hpp>
#include <boost/preprocessor/tuple/to_array.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_TO_ARRAY(tuple)
\brief converts a tuple to an array.
tuple = tuple to be converted.
If the tuple is an empty tuple it is converted to an array with 0 elements.
Otherwise the tuple is converted to an array with the same number of elements as the tuple.
*/
#define BOOST_VMD_TUPLE_TO_ARRAY(tuple) \
BOOST_VMD_IDENTITY_RESULT \
( \
BOOST_PP_IIF \
( \
BOOST_VMD_IS_EMPTY(tuple), \
BOOST_VMD_IDENTITY((0,())), \
BOOST_PP_TUPLE_TO_ARRAY \
) \
(tuple) \
) \
/**/
#endif /* BOOST_PP_VARIADICS */
#endif /* BOOST_VMD_TUPLE_TO_ARRAY_HPP */