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- #ifndef BOOST_VARIANT_VARIANT_FWD_HPP
- #define BOOST_VARIANT_VARIANT_FWD_HPP
- #include <boost/variant/detail/config.hpp>
- #include <boost/blank_fwd.hpp>
- #include <boost/mpl/arg.hpp>
- #include <boost/mpl/limits/arity.hpp>
- #include <boost/mpl/aux_/na.hpp>
- #include <boost/preprocessor/cat.hpp>
- #include <boost/preprocessor/enum.hpp>
- #include <boost/preprocessor/enum_params.hpp>
- #include <boost/preprocessor/enum_shifted_params.hpp>
- #include <boost/preprocessor/repeat.hpp>
- #if defined(BOOST_NO_USING_DECLARATION_OVERLOADS_FROM_TYPENAME_BASE)
- # define BOOST_VARIANT_NO_TYPE_SEQUENCE_SUPPORT
- #endif
- #include <boost/variant/detail/substitute_fwd.hpp>
- #include <boost/preprocessor/seq/size.hpp>
- #define BOOST_VARIANT_CLASS_OR_TYPENAME_TO_SEQ_class class)(
- #define BOOST_VARIANT_CLASS_OR_TYPENAME_TO_SEQ_typename typename)(
- #define BOOST_VARIANT_CLASS_OR_TYPENAME_TO_VARIADIC_class class...
- #define BOOST_VARIANT_CLASS_OR_TYPENAME_TO_VARIADIC_typename typename...
- #define ARGS_VARIADER_1(x) x ## N...
- #define ARGS_VARIADER_2(x) BOOST_VARIANT_CLASS_OR_TYPENAME_TO_VARIADIC_ ## x ## N
- #define BOOST_VARIANT_MAKE_VARIADIC(sequence, x) BOOST_VARIANT_MAKE_VARIADIC_I(BOOST_PP_SEQ_SIZE(sequence), x)
- #define BOOST_VARIANT_MAKE_VARIADIC_I(argscount, x) BOOST_VARIANT_MAKE_VARIADIC_II(argscount, x)
- #define BOOST_VARIANT_MAKE_VARIADIC_II(argscount, orig) ARGS_VARIADER_ ## argscount(orig)
- #define BOOST_VARIANT_ENUM_PARAMS(x) \
- x ## 0, \
- BOOST_VARIANT_MAKE_VARIADIC( (BOOST_VARIANT_CLASS_OR_TYPENAME_TO_SEQ_ ## x), x) \
-
- #define BOOST_VARIANT_ENUM_SHIFTED_PARAMS(x) \
- BOOST_VARIANT_MAKE_VARIADIC( (BOOST_VARIANT_CLASS_OR_TYPENAME_TO_SEQ_ ## x), x) \
-
- namespace boost {
- namespace detail { namespace variant {
- struct void_;
- template <typename T>
- struct convert_void
- {
- typedef T type;
- };
- template <>
- struct convert_void< void_ >
- {
- typedef mpl::na type;
- };
- #if defined(BOOST_NO_USING_DECLARATION_OVERLOADS_FROM_TYPENAME_BASE)
- #define BOOST_VARIANT_DETAIL_DEFINE_VOID_N(z,N,_) \
- struct BOOST_PP_CAT(void,N); \
- \
- template <> \
- struct convert_void< BOOST_PP_CAT(void,N) > \
- { \
- typedef mpl::na type; \
- }; \
-
- BOOST_PP_REPEAT(
- BOOST_VARIANT_LIMIT_TYPES
- , BOOST_VARIANT_DETAIL_DEFINE_VOID_N
- , _
- )
- #undef BOOST_VARIANT_DETAIL_DEFINE_VOID_N
- #endif
- }}
- #define BOOST_VARIANT_AUX_DECLARE_PARAMS BOOST_VARIANT_ENUM_PARAMS(typename T)
- template < BOOST_VARIANT_AUX_DECLARE_PARAMS > class variant;
- template < BOOST_VARIANT_AUX_DECLARE_PARAMS > struct make_recursive_variant;
- #undef BOOST_VARIANT_AUX_DECLARE_PARAMS_IMPL
- #undef BOOST_VARIANT_AUX_DECLARE_PARAMS
- #if !defined(BOOST_VARIANT_NO_FULL_RECURSIVE_VARIANT_SUPPORT)
- struct recursive_variant_ {};
- #else
- typedef mpl::arg<1> recursive_variant_;
- #endif
- template <typename Types> struct make_variant_over;
- template <typename Types> struct make_recursive_variant_over;
- }
- #endif
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