boost/preprocessor/seq/cat.hpp
# /* ************************************************************************** # * * # * (C) Copyright Paul Mensonides 2002. # * Distributed under the Boost Software License, Version 1.0. (See # * accompanying file LICENSE_1_0.txt or copy at # * http://www.boost.org/LICENSE_1_0.txt) # * * # ************************************************************************** */ # # /* See http://www.boost.org for most recent version. */ # # ifndef BOOST_PREPROCESSOR_SEQ_CAT_HPP # define BOOST_PREPROCESSOR_SEQ_CAT_HPP # # include <boost/preprocessor/config/config.hpp> # include <boost/preprocessor/seq/fold_left.hpp> # include <boost/preprocessor/seq/seq.hpp> # # /* BOOST_PP_SEQ_CAT */ # # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() # define BOOST_PP_SEQ_CAT(seq) BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq)) # else # define BOOST_PP_SEQ_CAT(seq) BOOST_PP_SEQ_CAT_I(seq) # define BOOST_PP_SEQ_CAT_I(seq) BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq)) # endif # # define BOOST_PP_SEQ_CAT_O(s, st, elem) BOOST_PP_SEQ_CAT_O_I(st, elem) # define BOOST_PP_SEQ_CAT_O_I(a, b) a ## b # # /* BOOST_PP_SEQ_CAT_S */ # # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() # define BOOST_PP_SEQ_CAT_S(s, seq) BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq)) # else # define BOOST_PP_SEQ_CAT_S(s, seq) BOOST_PP_SEQ_CAT_S_I(s, seq) # define BOOST_PP_SEQ_CAT_S_I(s, seq) BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq)) # endif # # endif