adt/detail/adapt_base_attr_filler.hpp

0001 /*=============================================================================
0002     Copyright (c) 2013-2014 Damien Buhl
0003
0004     Distributed under the Boost Software License, Version 1.0. (See accompanying
0005     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 ==============================================================================*/
0007
0008 #ifndef BOOST_FUSION_ADAPTED_ADT_DETAIL_ADAPT_BASE_ATTR_FILLER_HPP
0009 #define BOOST_FUSION_ADAPTED_ADT_DETAIL_ADAPT_BASE_ATTR_FILLER_HPP
0010
0011 #include <boost/config.hpp>
0012
0013 #include <boost/fusion/adapted/struct/detail/adapt_auto.hpp>
0014 #include <boost/fusion/adapted/struct/detail/preprocessor/is_seq.hpp>
0015
0016 #include <boost/mpl/aux_/preprocessor/token_equal.hpp>
0017
0018 #include <boost/preprocessor/arithmetic/dec.hpp>
0019 #include <boost/preprocessor/control/iif.hpp>
0020 #include <boost/preprocessor/logical/or.hpp>
0021 #include <boost/preprocessor/tuple/elem.hpp>
0022 #include <boost/preprocessor/variadic/to_seq.hpp>
0023 #include <boost/preprocessor/variadic/size.hpp>
0024 #include <boost/preprocessor/variadic/elem.hpp>
0025 #include <boost/preprocessor/seq/seq.hpp>
0026 #include <boost/preprocessor/seq/rest_n.hpp>
0027
0028
0029 #define BOOST_FUSION_ADAPT_ADT_WRAPPEDATTR_SIZE(ATTRIBUTE)                      \
0030   BOOST_PP_TUPLE_ELEM(2, 0, ATTRIBUTE)
0031
0032 #define BOOST_FUSION_ADAPT_ADT_WRAPPEDATTR(ATTRIBUTE)                           \
0033   BOOST_PP_TUPLE_ELEM(2, 1, ATTRIBUTE)
0034
0035 #if BOOST_PP_VARIADICS
0036
0037 #  define BOOST_FUSION_ADAPT_ADT_FILLER_0(...)                                  \
0038       BOOST_FUSION_ADAPT_ADT_FILLER(__VA_ARGS__)                                \
0039       BOOST_FUSION_ADAPT_ADT_FILLER_1
0040
0041 #  define BOOST_FUSION_ADAPT_ADT_FILLER_1(...)                                  \
0042       BOOST_FUSION_ADAPT_ADT_FILLER(__VA_ARGS__)                                \
0043       BOOST_FUSION_ADAPT_ADT_FILLER_0
0044
0045 #  define BOOST_FUSION_ADAPT_ADT_FILLER_0_END
0046 #  define BOOST_FUSION_ADAPT_ADT_FILLER_1_END
0047
0048 // MSVC don't compile when using BOOST_PP_BITOR instead of BOOST_PP_OR.
0049 #  define BOOST_FUSION_ADAPT_ADT_FILLER(...)                                    \
0050       BOOST_PP_IIF(                                                             \
0051           BOOST_PP_OR(                                                          \
0052               BOOST_MPL_PP_TOKEN_EQUAL(auto,                                    \
0053                   BOOST_PP_VARIADIC_ELEM(0, __VA_ARGS__)),                      \
0054               BOOST_MPL_PP_TOKEN_EQUAL(auto,                                    \
0055                   BOOST_PP_VARIADIC_ELEM(1, __VA_ARGS__))),                     \
0056                                                                                 \
0057           BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(                                     \
0058               BOOST_PP_VARIADIC_ELEM(2, __VA_ARGS__),                           \
0059               BOOST_FUSION_WORKAROUND_VARIADIC_EMPTINESS_LAST_ELEM(__VA_ARGS__) \
0060           ),                                                                    \
0061           BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(__VA_ARGS__))
0062
0063 #  define BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(...)                                 \
0064       ((BOOST_PP_VARIADIC_SIZE(__VA_ARGS__), (__VA_ARGS__)))
0065
0066 #  define BOOST_FUSION_WORKAROUND_VARIADIC_EMPTINESS_LAST_ELEM(...)             \
0067   BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_REST_N(                                        \
0068             BOOST_PP_DEC(BOOST_PP_VARIADIC_SIZE(__VA_ARGS__)),                  \
0069         BOOST_PP_VARIADIC_TO_SEQ(__VA_ARGS__)))
0070
0071 #else // BOOST_PP_VARIADICS
0072
0073 #  define BOOST_FUSION_ADAPT_ADT_FILLER_0(A, B, C, D)                           \
0074       BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(A,B,C,D)                                 \
0075       BOOST_FUSION_ADAPT_ADT_FILLER_1
0076
0077 #  define BOOST_FUSION_ADAPT_ADT_FILLER_1(A, B, C, D)                           \
0078       BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(A,B,C,D)                                 \
0079       BOOST_FUSION_ADAPT_ADT_FILLER_0
0080
0081 #  define BOOST_FUSION_ADAPT_ADT_FILLER_0_END
0082 #  define BOOST_FUSION_ADAPT_ADT_FILLER_1_END
0083
0084 #  define BOOST_FUSION_ADAPT_ADT_WRAP_ATTR(A, B, C, D)                          \
0085       BOOST_PP_IIF(BOOST_MPL_PP_TOKEN_EQUAL(auto, A),                           \
0086         ((2, (C,D))),                                                           \
0087         ((4, (A,B,C,D)))                                                        \
0088       )
0089
0090 #endif // BOOST_PP_VARIADICS
0091
0092 #endif