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50 lines
1.9 KiB
50 lines
1.9 KiB
3 years ago
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# /* **************************************************************************
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# * *
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# * (C) Copyright Paul Mensonides 2002.
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# * Distributed under the Boost Software License, Version 1.0. (See
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# * accompanying file LICENSE_1_0.txt or copy at
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# * http://www.boost.org/LICENSE_1_0.txt)
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# * *
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# ************************************************************************** */
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#
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# /* See http://www.boost.org for most recent version. */
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#
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# ifndef BOOST_PREPROCESSOR_SEQ_CAT_HPP
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# define BOOST_PREPROCESSOR_SEQ_CAT_HPP
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#
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# include <boost/preprocessor/arithmetic/dec.hpp>
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# include <boost/preprocessor/config/config.hpp>
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# include <boost/preprocessor/control/if.hpp>
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# include <boost/preprocessor/seq/fold_left.hpp>
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# include <boost/preprocessor/seq/seq.hpp>
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# include <boost/preprocessor/seq/size.hpp>
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# include <boost/preprocessor/tuple/eat.hpp>
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#
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# /* BOOST_PP_SEQ_CAT */
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#
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# define BOOST_PP_SEQ_CAT(seq) \
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BOOST_PP_IF( \
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BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq)), \
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BOOST_PP_SEQ_CAT_I, \
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BOOST_PP_SEQ_HEAD \
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)(seq) \
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/**/
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# 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))
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#
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# define BOOST_PP_SEQ_CAT_O(s, st, elem) BOOST_PP_SEQ_CAT_O_I(st, elem)
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# define BOOST_PP_SEQ_CAT_O_I(a, b) a ## b
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#
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# /* BOOST_PP_SEQ_CAT_S */
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#
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# define BOOST_PP_SEQ_CAT_S(s, seq) \
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BOOST_PP_IF( \
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BOOST_PP_DEC(BOOST_PP_SEQ_SIZE(seq)), \
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BOOST_PP_SEQ_CAT_S_I_A, \
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BOOST_PP_SEQ_CAT_S_I_B \
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)(s, seq) \
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/**/
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# define BOOST_PP_SEQ_CAT_S_I_A(s, seq) BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_CAT_O, BOOST_PP_SEQ_HEAD(seq), BOOST_PP_SEQ_TAIL(seq))
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# define BOOST_PP_SEQ_CAT_S_I_B(s, seq) BOOST_PP_SEQ_HEAD(seq)
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#
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# endif
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