boost/describe/detail/pp_utilities.hpp
#ifndef BOOST_DESCRIBE_DETAIL_PP_UTILITIES_HPP_INCLUDED #define BOOST_DESCRIBE_DETAIL_PP_UTILITIES_HPP_INCLUDED // Copyright 2021 Peter Dimov // Distributed under the Boost Software License, Version 1.0. // https://www.boost.org/LICENSE_1_0.txt #define BOOST_DESCRIBE_PP_EXPAND(x) x #define BOOST_DESCRIBE_PP_CAT(x, y) BOOST_DESCRIBE_PP_CAT_I(x, y) #define BOOST_DESCRIBE_PP_CAT_I(x, ...) x ## __VA_ARGS__ #if defined(_MSC_VER) && !defined(__clang__) #define BOOST_DESCRIBE_PP_FIRST(x) BOOST_DESCRIBE_PP_FIRST_I((x)) #define BOOST_DESCRIBE_PP_FIRST_I(x) BOOST_DESCRIBE_PP_FIRST_II x #define BOOST_DESCRIBE_PP_FIRST_II(x, ...) x #else #define BOOST_DESCRIBE_PP_FIRST(x) BOOST_DESCRIBE_PP_FIRST_I(x) #define BOOST_DESCRIBE_PP_FIRST_I(x, ...) x #endif #define BOOST_DESCRIBE_PP_IS_PAREN_I(x) BOOST_DESCRIBE_PP_CAT(BOOST_DESCRIBE_PP_IS_PAREN_I_, BOOST_DESCRIBE_PP_IS_PAREN_II x) #define BOOST_DESCRIBE_PP_IS_PAREN_II(...) 0 #define BOOST_DESCRIBE_PP_IS_PAREN_I_0 1, #define BOOST_DESCRIBE_PP_IS_PAREN_I_BOOST_DESCRIBE_PP_IS_PAREN_II 0, #define BOOST_DESCRIBE_PP_IS_PAREN(x) BOOST_DESCRIBE_PP_FIRST(BOOST_DESCRIBE_PP_IS_PAREN_I(x)) #define BOOST_DESCRIBE_PP_EMPTY #define BOOST_DESCRIBE_PP_IS_EMPTY(x) BOOST_DESCRIBE_PP_IS_EMPTY_I(BOOST_DESCRIBE_PP_IS_PAREN(x), BOOST_DESCRIBE_PP_IS_PAREN(x BOOST_DESCRIBE_PP_EMPTY ())) #define BOOST_DESCRIBE_PP_IS_EMPTY_I(x, y) BOOST_DESCRIBE_PP_IS_EMPTY_II(x, y) #define BOOST_DESCRIBE_PP_IS_EMPTY_II(x, y) BOOST_DESCRIBE_PP_IS_EMPTY_III(x, y) #define BOOST_DESCRIBE_PP_IS_EMPTY_III(x, y) BOOST_DESCRIBE_PP_IS_EMPTY_III_ ## x ## y #define BOOST_DESCRIBE_PP_IS_EMPTY_III_00 0 #define BOOST_DESCRIBE_PP_IS_EMPTY_III_01 1 #define BOOST_DESCRIBE_PP_IS_EMPTY_III_10 0 #define BOOST_DESCRIBE_PP_IS_EMPTY_III_11 0 #define BOOST_DESCRIBE_PP_CALL(F, a, x) BOOST_DESCRIBE_PP_CAT(BOOST_DESCRIBE_PP_CALL_I_, BOOST_DESCRIBE_PP_IS_EMPTY(x))(F, a, x) #define BOOST_DESCRIBE_PP_CALL_I_0(F, a, x) F(a, x) #define BOOST_DESCRIBE_PP_CALL_I_1(F, a, x) #define BOOST_DESCRIBE_PP_PARSE(x) BOOST_DESCRIBE_PP_CAT(BOOST_DESCRIBE_PP_PARSE_I_, BOOST_DESCRIBE_PP_PARSE_II x) #define BOOST_DESCRIBE_PP_PARSE_II(...) 0, (__VA_ARGS__), #define BOOST_DESCRIBE_PP_PARSE_I_BOOST_DESCRIBE_PP_PARSE_II 0, ~, #define BOOST_DESCRIBE_PP_PARSE_I_0 1 #if defined(_MSC_VER) && !defined(__clang__) #define BOOST_DESCRIBE_PP_NAME(x) BOOST_DESCRIBE_PP_NAME_I(BOOST_DESCRIBE_PP_PARSE(x)) #define BOOST_DESCRIBE_PP_NAME_I(x) BOOST_DESCRIBE_PP_NAME_II((x)) #define BOOST_DESCRIBE_PP_NAME_II(x) BOOST_DESCRIBE_PP_NAME_III x #define BOOST_DESCRIBE_PP_NAME_III(x, y, z) #z #else #define BOOST_DESCRIBE_PP_NAME(x) BOOST_DESCRIBE_PP_NAME_I(BOOST_DESCRIBE_PP_PARSE(x)) #define BOOST_DESCRIBE_PP_NAME_I(x) BOOST_DESCRIBE_PP_NAME_II(x) #define BOOST_DESCRIBE_PP_NAME_II(x, y, z) #z #endif // template<class C, class F> constexpr auto mfn( F C::* p ) { return p; } // template<class C, class F> constexpr auto mfn( F * p ) { return p; } #define BOOST_DESCRIBE_PP_POINTER(C, x) BOOST_DESCRIBE_PP_POINTER_I(C, BOOST_DESCRIBE_PP_PARSE(x)) #define BOOST_DESCRIBE_PP_EXPAND_V(...) __VA_ARGS__ #if defined(_MSC_VER) && !defined(__clang__) #define BOOST_DESCRIBE_PP_POINTER_I(C, x) BOOST_DESCRIBE_PP_POINTER_II((C, x)) #define BOOST_DESCRIBE_PP_POINTER_II(x) BOOST_DESCRIBE_PP_POINTER_III x #define BOOST_DESCRIBE_PP_POINTER_III(C, x, y, z) BOOST_DESCRIBE_PP_POINTER_III_##x(C, y, z) #define BOOST_DESCRIBE_PP_POINTER_III_0(C, y, z) &C::z #define BOOST_DESCRIBE_PP_POINTER_III_1(C, y, z) ::boost::describe::detail::mfn<C, BOOST_DESCRIBE_PP_EXPAND_V y>(&C::z) #else #define BOOST_DESCRIBE_PP_POINTER_I(C, x) BOOST_DESCRIBE_PP_POINTER_II(C, x) #define BOOST_DESCRIBE_PP_POINTER_II(C, x, y, z) BOOST_DESCRIBE_PP_POINTER_III_##x(C, y, z) #define BOOST_DESCRIBE_PP_POINTER_III_0(C, y, z) &C::z #define BOOST_DESCRIBE_PP_POINTER_III_1(C, y, z) ::boost::describe::detail::mfn<C, BOOST_DESCRIBE_PP_EXPAND_V y>(&C::z) #endif #endif // #ifndef BOOST_DESCRIBE_DETAIL_PP_UTILITIES_HPP_INCLUDED