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53 lines
1.3 KiB
C++
53 lines
1.3 KiB
C++
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// (C) Copyright Edward Diener 2015
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt).
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#if !defined(BOOST_VMD_TUPLE_TO_ARRAY_HPP)
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#define BOOST_VMD_TUPLE_TO_ARRAY_HPP
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#include <boost/vmd/detail/setup.hpp>
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#if BOOST_PP_VARIADICS
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#include <boost/preprocessor/control/iif.hpp>
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#include <boost/preprocessor/tuple/to_array.hpp>
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#include <boost/vmd/identity.hpp>
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#include <boost/vmd/is_empty.hpp>
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/*
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The succeeding comments in this file are in doxygen format.
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*/
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/** \file
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*/
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/** \def BOOST_VMD_TUPLE_TO_ARRAY(tuple)
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\brief converts a tuple to an array.
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tuple = tuple to be converted.
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If the tuple is an empty tuple it is converted to an array with 0 elements.
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Otherwise the tuple is converted to an array with the same number of elements as the tuple.
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*/
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#define BOOST_VMD_TUPLE_TO_ARRAY(tuple) \
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BOOST_VMD_IDENTITY_RESULT \
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( \
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BOOST_PP_IIF \
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( \
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BOOST_VMD_IS_EMPTY(tuple), \
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BOOST_VMD_IDENTITY((0,())), \
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BOOST_PP_TUPLE_TO_ARRAY \
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) \
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(tuple) \
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) \
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/**/
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#endif /* BOOST_PP_VARIADICS */
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#endif /* BOOST_VMD_TUPLE_TO_ARRAY_HPP */
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