boost/fusion/adapted/struct/adapt_struct.hpp
/*=============================================================================
Copyright (c) 2001-2007 Joel de Guzman
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)
==============================================================================*/
#if !defined(BOOST_FUSION_ADAPT_STRUCT_APRIL_2_2007_1158AM)
#define BOOST_FUSION_ADAPT_STRUCT_APRIL_2_2007_1158AM
#include <boost/fusion/support/tag_of_fwd.hpp>
#include <boost/fusion/adapted/struct/extension.hpp>
#include <boost/fusion/adapted/struct/struct_iterator.hpp>
#include <boost/fusion/adapted/struct/detail/is_view_impl.hpp>
#include <boost/fusion/adapted/struct/detail/is_sequence_impl.hpp>
#include <boost/fusion/adapted/struct/detail/category_of_impl.hpp>
#include <boost/fusion/adapted/struct/detail/begin_impl.hpp>
#include <boost/fusion/adapted/struct/detail/end_impl.hpp>
#include <boost/fusion/adapted/struct/detail/size_impl.hpp>
#include <boost/fusion/adapted/struct/detail/at_impl.hpp>
#include <boost/fusion/adapted/struct/detail/value_at_impl.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/punctuation/comma_if.hpp>
#include <boost/preprocessor/seq/for_each_i.hpp>
#include <boost/preprocessor/tuple/elem.hpp>
#include <boost/preprocessor/repetition/enum_params_with_a_default.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/mpl/int.hpp>
#include <boost/config/no_tr1/utility.hpp>
#define BOOST_FUSION_ADAPT_STRUCT(name, bseq) \
BOOST_FUSION_ADAPT_STRUCT_I( \
name, BOOST_PP_CAT(BOOST_FUSION_ADAPT_STRUCT_X bseq, 0)) \
/***/
#define BOOST_FUSION_ADAPT_STRUCT_X(x, y) ((x, y)) BOOST_FUSION_ADAPT_STRUCT_Y
#define BOOST_FUSION_ADAPT_STRUCT_Y(x, y) ((x, y)) BOOST_FUSION_ADAPT_STRUCT_X
#define BOOST_FUSION_ADAPT_STRUCT_X0
#define BOOST_FUSION_ADAPT_STRUCT_Y0
// BOOST_FUSION_ADAPT_STRUCT_I generates the overarching structure and uses
// SEQ_FOR_EACH_I to generate the "linear" substructures.
// Thanks to Paul Mensonides for the PP macro help
#define BOOST_FUSION_ADAPT_STRUCT_I(name, seq) \
namespace boost { namespace fusion { namespace traits \
{ \
template <> \
struct tag_of<name> \
{ \
typedef struct_tag type; \
}; \
}}} \
\
namespace boost { namespace mpl \
{ \
template<typename> \
struct sequence_tag; \
\
template<> \
struct sequence_tag<name> \
{ \
typedef fusion::fusion_sequence_tag type; \
}; \
\
template<> \
struct sequence_tag<name const> \
{ \
typedef fusion::fusion_sequence_tag type; \
}; \
}} \
\
namespace boost { namespace fusion { namespace extension \
{ \
template <> \
struct struct_size<name> : mpl::int_<BOOST_PP_SEQ_SIZE(seq)> {}; \
BOOST_PP_SEQ_FOR_EACH_I(BOOST_FUSION_ADAPT_STRUCT_C, name, seq) \
}}} \
/***/
#define BOOST_FUSION_ADAPT_STRUCT_C(r, name, i, xy) \
template <> \
struct struct_member<name, i> \
{ \
typedef BOOST_PP_TUPLE_ELEM(2, 0, xy) type; \
static type& call(name& struct_) \
{ \
return struct_.BOOST_PP_TUPLE_ELEM(2, 1, xy); \
}; \
}; \
/***/
#endif
