forked from boostorg/fusion
37fc1443ad
This enable the following flexible macro signature when there is
no BOOST_PP_VARIADICS support:
BOOST_FUSION_ADAPT_STRUCT(
struct_name,
(member_type0, member_name0)
(BOOST_FUSION_ADAPT_AUTO, member_name1)
(,member_name2)
...
)
If BOOST_PP_VARIADICS is active then there is quite more flexibility as it
allows to avoid the type specification:
BOOST_FUSION_ADAPT_STRUCT(
struct_name,
(member_type0, member_name0)
(BOOST_FUSION_ADAPT_AUTO, member_name1)
(,member_name2)
(member_name3)
...
)
120 lines
6.3 KiB
C++
120 lines
6.3 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2007 Joel de Guzman
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Copyright (c) 2009-2011 Christopher Schmidt
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#ifndef BOOST_FUSION_ADAPTED_STRUCT_ADAPT_STRUCT_HPP
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#define BOOST_FUSION_ADAPTED_STRUCT_ADAPT_STRUCT_HPP
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#include <boost/fusion/support/config.hpp>
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#include <boost/preprocessor/config/config.hpp>
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#include <boost/preprocessor/variadic.hpp>
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#include <boost/preprocessor/cat.hpp>
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#include <boost/preprocessor/empty.hpp>
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#include <boost/preprocessor/control/if.hpp>
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#include <boost/preprocessor/facilities/is_empty.hpp>
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#include <boost/preprocessor/comparison/equal.hpp>
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#include <boost/type_traits/add_reference.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/type_traits/add_const.hpp>
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#include <boost/type_traits/remove_const.hpp>
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#include <boost/fusion/adapted/struct/detail/extension.hpp>
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#include <boost/fusion/adapted/struct/detail/adapt_base.hpp>
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#include <boost/fusion/adapted/struct/detail/at_impl.hpp>
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#include <boost/fusion/adapted/struct/detail/is_view_impl.hpp>
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#include <boost/fusion/adapted/struct/detail/is_sequence_impl.hpp>
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#include <boost/fusion/adapted/struct/detail/value_at_impl.hpp>
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#include <boost/fusion/adapted/struct/detail/category_of_impl.hpp>
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#include <boost/fusion/adapted/struct/detail/size_impl.hpp>
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#include <boost/fusion/adapted/struct/detail/begin_impl.hpp>
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#include <boost/fusion/adapted/struct/detail/end_impl.hpp>
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#include <boost/fusion/adapted/struct/detail/value_of_impl.hpp>
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#include <boost/fusion/adapted/struct/detail/deref_impl.hpp>
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#if BOOST_PP_VARIADICS
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#define BOOST_FUSION_ADAPT_STRUCT_CREATE_MEMBER_TUPLE(...) \
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BOOST_PP_IF(BOOST_PP_EQUAL(BOOST_PP_VARIADIC_SIZE(__VA_ARGS__), 2), \
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BOOST_PP_IF(BOOST_PP_IS_EMPTY(BOOST_PP_VARIADIC_ELEM(0, __VA_ARGS__)), \
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((1, (BOOST_PP_VARIADIC_ELEM(1, __VA_ARGS__)) )), \
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((2, BOOST_PP_VARIADIC_TO_TUPLE(__VA_ARGS__))) \
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), \
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((1, (BOOST_PP_VARIADIC_ELEM(0, __VA_ARGS__)) )) \
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)
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#define BOOST_FUSION_ADAPT_STRUCT_FILLER_0(...) \
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BOOST_FUSION_ADAPT_STRUCT_CREATE_MEMBER_TUPLE(__VA_ARGS__) \
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BOOST_FUSION_ADAPT_STRUCT_FILLER_1
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#define BOOST_FUSION_ADAPT_STRUCT_FILLER_1(...) \
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BOOST_FUSION_ADAPT_STRUCT_CREATE_MEMBER_TUPLE(__VA_ARGS__) \
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BOOST_FUSION_ADAPT_STRUCT_FILLER_0
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#define BOOST_FUSION_ADAPT_STRUCT_FILLER_0_END
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#define BOOST_FUSION_ADAPT_STRUCT_FILLER_1_END
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#else // BOOST_PP_VARIADICS
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#define BOOST_FUSION_ADAPT_STRUCT_CREATE_MEMBER_TUPLE(X, Y) \
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BOOST_PP_IF(BOOST_PP_IS_EMPTY(X), \
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((1, (Y))), \
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((2, (X,Y))) \
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)
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#define BOOST_FUSION_ADAPT_STRUCT_FILLER_0(X, Y) \
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BOOST_FUSION_ADAPT_STRUCT_CREATE_MEMBER_TUPLE(X,Y) \
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BOOST_FUSION_ADAPT_STRUCT_FILLER_1
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#define BOOST_FUSION_ADAPT_STRUCT_FILLER_1(X, Y) \
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BOOST_FUSION_ADAPT_STRUCT_CREATE_MEMBER_TUPLE(X,Y) \
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BOOST_FUSION_ADAPT_STRUCT_FILLER_0
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#define BOOST_FUSION_ADAPT_STRUCT_FILLER_0_END
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#define BOOST_FUSION_ADAPT_STRUCT_FILLER_1_END
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#endif // BOOST_PP_VARIADICS
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#define BOOST_FUSION_ADAPT_AUTO BOOST_PP_EMPTY()
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#define BOOST_FUSION_ADAPT_STRUCT_C(TEMPLATE_PARAMS_SEQ, NAME_SEQ, I, ATTRIBUTE)\
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BOOST_FUSION_ADAPT_STRUCT_C_BASE( \
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TEMPLATE_PARAMS_SEQ, \
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NAME_SEQ, \
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I, \
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BOOST_PP_EMPTY, \
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BOOST_PP_TUPLE_ELEM(2, 1, ATTRIBUTE), \
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BOOST_PP_TUPLE_ELEM(2, 0, ATTRIBUTE))
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#define BOOST_FUSION_ADAPT_TPL_STRUCT(TEMPLATE_PARAMS_SEQ,NAME_SEQ, ATTRIBUTES) \
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BOOST_FUSION_ADAPT_STRUCT_BASE( \
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(1)TEMPLATE_PARAMS_SEQ, \
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(1)NAME_SEQ, \
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struct_tag, \
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0, \
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((0,0)) BOOST_PP_CAT( \
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BOOST_FUSION_ADAPT_STRUCT_FILLER_0 ATTRIBUTES,_END), \
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BOOST_FUSION_ADAPT_STRUCT_C)
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#define BOOST_FUSION_ADAPT_STRUCT(NAME, ATTRIBUTES) \
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BOOST_FUSION_ADAPT_STRUCT_BASE( \
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(0), \
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(0)(NAME), \
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struct_tag, \
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0, \
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BOOST_PP_CAT( BOOST_FUSION_ADAPT_STRUCT_FILLER_0(0,0)ATTRIBUTES,_END), \
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BOOST_FUSION_ADAPT_STRUCT_C)
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#define BOOST_FUSION_ADAPT_STRUCT_AS_VIEW(NAME, ATTRIBUTES) \
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BOOST_FUSION_ADAPT_STRUCT_BASE( \
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(0), \
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(0)(NAME), \
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struct_tag, \
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1, \
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BOOST_PP_CAT(BOOST_FUSION_ADAPT_STRUCT_FILLER_0(0,0)ATTRIBUTES,_END), \
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BOOST_FUSION_ADAPT_STRUCT_C)
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#endif
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