forked from boostorg/preprocessor
74 lines
3.6 KiB
C++
74 lines
3.6 KiB
C++
# /* **************************************************************************
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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_REVERSE_HPP
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# define BOOST_PREPROCESSOR_SEQ_REVERSE_HPP
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#
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# include <boost/preprocessor/config/config.hpp>
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# include <boost/preprocessor/cat.hpp>
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# include <boost/preprocessor/arithmetic/div.hpp>
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# include <boost/preprocessor/control/if.hpp>
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# include <boost/preprocessor/facilities/empty.hpp>
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# include <boost/preprocessor/facilities/identity.hpp>
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# include <boost/preprocessor/seq/first_n.hpp>
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# include <boost/preprocessor/seq/rest_n.hpp>
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# include <boost/preprocessor/seq/fold_left.hpp>
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# include <boost/preprocessor/seq/size.hpp>
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# include <boost/preprocessor/config/limits.hpp>
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#
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# /* BOOST_PP_SEQ_REVERSE */
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#
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# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
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# if BOOST_PP_LIMIT_SEQ == 256
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# define BOOST_PP_SEQ_REVERSE(seq) BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_REVERSE_O, BOOST_PP_EMPTY, seq)()
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# else
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# define BOOST_PP_SEQ_REVERSE(seq) BOOST_PP_SEQ_REVERSE_HALVES(BOOST_PP_DIV(BOOST_PP_SEQ_SIZE(seq),2),seq)
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# define BOOST_PP_SEQ_REVERSE_HALVES(half,seq) \
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BOOST_PP_IF(half,BOOST_PP_SEQ_REVERSE_NAMT,BOOST_PP_IDENTITY_N(seq,2))(half,seq)
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# define BOOST_PP_SEQ_REVERSE_NAMT(half,seq) \
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BOOST_PP_SEQ_DO_REVERSE(BOOST_PP_SEQ_REST_N(half,seq)) BOOST_PP_SEQ_DO_REVERSE(BOOST_PP_SEQ_FIRST_N(half,seq))
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# define BOOST_PP_SEQ_DO_REVERSE(seq) BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_REVERSE_O, BOOST_PP_EMPTY, seq)()
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# endif
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# else
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# define BOOST_PP_SEQ_REVERSE(seq) BOOST_PP_SEQ_REVERSE_I(seq)
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# if BOOST_PP_LIMIT_SEQ == 256
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# define BOOST_PP_SEQ_REVERSE_I(seq) BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_REVERSE_O, BOOST_PP_EMPTY, seq)()
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# else
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# define BOOST_PP_SEQ_REVERSE_I(seq) BOOST_PP_SEQ_REVERSE_HALVES(BOOST_PP_DIV(BOOST_PP_SEQ_SIZE(seq),2),seq)
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# endif
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# endif
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#
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# define BOOST_PP_SEQ_REVERSE_O(s, state, elem) (elem) state
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#
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# /* BOOST_PP_SEQ_REVERSE_S */
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#
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# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
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# if BOOST_PP_LIMIT_SEQ == 256
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# define BOOST_PP_SEQ_REVERSE_S(s, seq) BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_REVERSE_O, BOOST_PP_EMPTY, seq)()
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# else
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# define BOOST_PP_SEQ_REVERSE_S(s, seq) BOOST_PP_SEQ_REVERSE_HALVES_S(s,BOOST_PP_DIV(BOOST_PP_SEQ_SIZE(seq),2),seq)
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# define BOOST_PP_SEQ_REVERSE_HALVES_S(s,half,seq) \
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BOOST_PP_IF(half,BOOST_PP_SEQ_REVERSE_NAMT_S,BOOST_PP_IDENTITY_N(seq,3))(s,half,seq)
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# define BOOST_PP_SEQ_REVERSE_NAMT_S(s,half,seq) \
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BOOST_PP_SEQ_DO_REVERSE_S(s,BOOST_PP_SEQ_REST_N(half,seq)) BOOST_PP_SEQ_DO_REVERSE_S(s,BOOST_PP_SEQ_FIRST_N(half,seq))
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# define BOOST_PP_SEQ_DO_REVERSE_S(s, seq) BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_REVERSE_O, BOOST_PP_EMPTY, seq)()
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# endif
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# else
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# define BOOST_PP_SEQ_REVERSE_S(s, seq) BOOST_PP_SEQ_REVERSE_S_I(s, seq)
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# if BOOST_PP_LIMIT_SEQ == 256
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# define BOOST_PP_SEQ_REVERSE_S_I(s, seq) BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_REVERSE_O, BOOST_PP_EMPTY, seq)()
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# else
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# define BOOST_PP_SEQ_REVERSE_S_I(s, seq) BOOST_PP_SEQ_REVERSE_HALVES_S(s,BOOST_PP_DIV(BOOST_PP_SEQ_SIZE(seq),2),seq)
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# endif
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# endif
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#
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# endif
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