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// (C) Copyright Edward Diener 2011-2015
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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_DETAIL_IS_EMPTY_TUPLE_HPP)
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#define BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_HPP
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#include <boost/preprocessor/comparison/equal.hpp>
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#include <boost/preprocessor/control/iif.hpp>
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#include <boost/preprocessor/tuple/elem.hpp>
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#include <boost/preprocessor/tuple/size.hpp>
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#include <boost/vmd/identity.hpp>
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#include <boost/vmd/is_empty.hpp>
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#include <boost/vmd/is_tuple.hpp>
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#define BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_CEM(tuple) \
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BOOST_VMD_IS_EMPTY(BOOST_PP_TUPLE_ELEM(0,tuple)) \
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/**/
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#define BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_SIZE(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_PP_EQUAL(BOOST_PP_TUPLE_SIZE(tuple),1), \
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BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_CEM, \
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BOOST_VMD_IDENTITY(0) \
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) \
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(tuple) \
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) \
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/**/
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#define BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_SIZE_D(d,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_PP_EQUAL_D(d,BOOST_PP_TUPLE_SIZE(tuple),1), \
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BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_CEM, \
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BOOST_VMD_IDENTITY(0) \
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) \
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(tuple) \
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) \
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/**/
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#define BOOST_VMD_DETAIL_IS_EMPTY_TUPLE(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_TUPLE(tuple), \
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BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_SIZE, \
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BOOST_VMD_IDENTITY(0) \
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) \
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(tuple) \
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) \
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/**/
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#define BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_D(d,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_TUPLE(tuple), \
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BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_SIZE_D, \
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BOOST_VMD_IDENTITY(0) \
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) \
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(d,tuple) \
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) \
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/**/
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#endif /* BOOST_VMD_DETAIL_IS_EMPTY_TUPLE_HPP */
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