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/*! @file Defines generally useful preprocessor macros. @copyright Louis Dionne 2013-2017 Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) */ #ifndef BOOST_HANA_DETAIL_PREPROCESSOR_HPP #define BOOST_HANA_DETAIL_PREPROCESSOR_HPP //! @ingroup group-details //! Expands to the concatenation of its two arguments. #define BOOST_HANA_PP_CONCAT(x, y) BOOST_HANA_PP_CONCAT_PRIMITIVE(x, y) #define BOOST_HANA_PP_CONCAT_PRIMITIVE(x, y) x ## y //! @ingroup group-details //! Expands to the stringized version of its argument. #define BOOST_HANA_PP_STRINGIZE(...) BOOST_HANA_PP_STRINGIZE_PRIMITIVE(__VA_ARGS__) #define BOOST_HANA_PP_STRINGIZE_PRIMITIVE(...) #__VA_ARGS__ //! @ingroup group-details //! Expands to its first argument. #ifdef BOOST_HANA_WORKAROUND_MSVC_PREPROCESSOR_616033 #define BOOST_HANA_PP_FRONT(...) BOOST_HANA_PP_FRONT_IMPL_I(__VA_ARGS__) #define BOOST_HANA_PP_FRONT_IMPL_I(...) BOOST_HANA_PP_CONCAT(BOOST_HANA_PP_FRONT_IMPL(__VA_ARGS__, ),) #else #define BOOST_HANA_PP_FRONT(...) BOOST_HANA_PP_FRONT_IMPL(__VA_ARGS__, ) #endif #define BOOST_HANA_PP_FRONT_IMPL(e0, ...) e0 //! @ingroup group-details //! Expands to all of its arguments, except for the first one. //! //! This macro may not be called with less than 2 arguments. #define BOOST_HANA_PP_DROP_FRONT(e0, ...) __VA_ARGS__ #endif // !BOOST_HANA_DETAIL_PREPROCESSOR_HPP