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# ifndef BOOST_PREPROCESSOR_CAT_HPP
# define BOOST_PREPROCESSOR_CAT_HPP
#
# include <boost/preprocessor/config/config.hpp>
#
#
#
# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MWCC()
# define BOOST_PP_CAT(a, b) BOOST_PP_CAT_I(a, b)
# else
# define BOOST_PP_CAT(a, b) BOOST_PP_CAT_OO((a, b))
# define BOOST_PP_CAT_OO(par) BOOST_PP_CAT_I ## par
# endif
#
# if (~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_MSVC()) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 1700)
# define BOOST_PP_CAT_I(a, b) a ## b
# else
# define BOOST_PP_CAT_I(a, b) BOOST_PP_CAT_II(~, a ## b)
# define BOOST_PP_CAT_II(p, res) res
# endif
#
# endif