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/*=============================================================================
Copyright (c) 2013-2014 Damien Buhl
Distributed under 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)
==============================================================================*/
#ifndef BOOST_FUSION_ADAPTED_ADT_DETAIL_ADAPT_BASE_ATTR_FILLER_HPP
#define BOOST_FUSION_ADAPTED_ADT_DETAIL_ADAPT_BASE_ATTR_FILLER_HPP
#include <boost/config.hpp>
#include <boost/fusion/adapted/struct/detail/preprocessor/is_seq.hpp>
#include <boost/preprocessor/arithmetic/sub.hpp>
#include <boost/preprocessor/control/if.hpp>
#include <boost/preprocessor/logical/or.hpp>
#include <boost/preprocessor/empty.hpp>
#include <boost/preprocessor/tuple/size.hpp>
#include <boost/preprocessor/tuple/elem.hpp>
#include <boost/preprocessor/facilities/is_empty.hpp>
#include <boost/preprocessor/variadic/to_seq.hpp>
#include <boost/preprocessor/variadic/to_tuple.hpp>
#include <boost/preprocessor/variadic/elem.hpp>
#include <boost/preprocessor/seq/for_each.hpp>
#include <boost/preprocessor/seq/push_front.hpp>
#include <boost/preprocessor/seq/rest_n.hpp>
#include <boost/preprocessor/tuple/reverse.hpp>
#define BOOST_FUSION_ADAPT_ADT_WRAPPEDATTR_SIZE(ATTRIBUTE) \
BOOST_PP_TUPLE_ELEM(2, 0, ATTRIBUTE)
#define BOOST_FUSION_ADAPT_ADT_WRAPPEDATTR(ATTRIBUTE) \
BOOST_PP_TUPLE_ELEM(2, 1, ATTRIBUTE)
#if BOOST_PP_VARIADICS
# define BOOST_FUSION_ADAPT_ADT_FILLER_0(...) \
BOOST_FUSION_ADAPT_ADT_FILLER(__VA_ARGS__) \
BOOST_FUSION_ADAPT_ADT_FILLER_1
# define BOOST_FUSION_ADAPT_ADT_FILLER_1(...) \
BOOST_FUSION_ADAPT_ADT_FILLER(__VA_ARGS__) \
BOOST_FUSION_ADAPT_ADT_FILLER_0
# define BOOST_FUSION_ADAPT_ADT_FILLER_0_END
# define BOOST_FUSION_ADAPT_ADT_FILLER_1_END
# define BOOST_FUSION_ADAPT_ADT_FILLER(...) \
BOOST_PP_IF( \
BOOST_PP_OR( \
BOOST_PP_IS_EMPTY(BOOST_PP_VARIADIC_ELEM(0, __VA_ARGS__)), \
BOOST_PP_IS_EMPTY(BOOST_PP_VARIADIC_ELEM(1, __VA_ARGS__))), \
BOOST_FUSION_ADAPT_ADT_WRAP_ATTR( \
BOOST_PP_VARIADIC_ELEM(2, __VA_ARGS__), \
BOOST_FUSION_WORKAROUND_VARIADIC_EMPTINESS_LAST_ELEM(__VA_ARGS__) \
), \
BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(__VA_ARGS__))
# define BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(...) \
((BOOST_PP_VARIADIC_SIZE(__VA_ARGS__), (__VA_ARGS__)))
# define BOOST_FUSION_WORKAROUND_VARIADIC_EMPTINESS_LAST_ELEM(...) \
BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_REST_N( \
BOOST_PP_SUB(BOOST_PP_VARIADIC_SIZE(__VA_ARGS__), 1), \
BOOST_PP_VARIADIC_TO_SEQ(__VA_ARGS__)))
#else // BOOST_PP_VARIADICS
# define BOOST_FUSION_ADAPT_ADT_FILLER_0(A, B, C, D) \
BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(A,B,C,D) \
BOOST_FUSION_ADAPT_ADT_FILLER_1
# define BOOST_FUSION_ADAPT_ADT_FILLER_1(A, B, C, D) \
BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(A,B,C,D) \
BOOST_FUSION_ADAPT_ADT_FILLER_0
# define BOOST_FUSION_ADAPT_ADT_FILLER_0_END
# define BOOST_FUSION_ADAPT_ADT_FILLER_1_END
# define BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(A, B, C, D) \
BOOST_PP_IF(BOOST_PP_IS_EMPTY(A), \
((2, (C,D))), \
((4, (A,B,C,D))) \
)
#endif // BOOST_PP_VARIADICS
#endif
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