[857] | 1 | # /* **************************************************************************
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| 2 | # * *
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| 3 | # * (C) Copyright Paul Mensonides 2002.
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| 4 | # * Distributed under the Boost Software License, Version 1.0. (See
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| 5 | # * accompanying file LICENSE_1_0.txt or copy at
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| 6 | # * http://www.boost.org/LICENSE_1_0.txt)
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| 7 | # * *
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| 8 | # ************************************************************************** */
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| 9 | #
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| 10 | # /* See http://www.boost.org for most recent version. */
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| 11 | #
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| 12 | # ifndef BOOST_PREPROCESSOR_SEQ_FILTER_HPP
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| 13 | # define BOOST_PREPROCESSOR_SEQ_FILTER_HPP
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| 14 | #
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| 15 | # include <boost/preprocessor/config/config.hpp>
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| 16 | # include <boost/preprocessor/control/expr_if.hpp>
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| 17 | # include <boost/preprocessor/facilities/empty.hpp>
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| 18 | # include <boost/preprocessor/seq/fold_left.hpp>
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| 19 | # include <boost/preprocessor/seq/seq.hpp>
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| 20 | # include <boost/preprocessor/tuple/elem.hpp>
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| 21 | # include <boost/preprocessor/tuple/rem.hpp>
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| 22 | #
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| 23 | # /* BOOST_PP_SEQ_FILTER */
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| 24 | #
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| 25 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
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| 26 | # define BOOST_PP_SEQ_FILTER(pred, data, seq) BOOST_PP_SEQ_TAIL(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_FILTER_O, (pred, data, (nil)), seq)))
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| 27 | # else
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| 28 | # define BOOST_PP_SEQ_FILTER(pred, data, seq) BOOST_PP_SEQ_FILTER_I(pred, data, seq)
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| 29 | # define BOOST_PP_SEQ_FILTER_I(pred, data, seq) BOOST_PP_SEQ_TAIL(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_FOLD_LEFT(BOOST_PP_SEQ_FILTER_O, (pred, data, (nil)), seq)))
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| 30 | # endif
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| 31 | #
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| 32 | # if BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_STRICT()
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| 33 | # define BOOST_PP_SEQ_FILTER_O(s, st, elem) BOOST_PP_SEQ_FILTER_O_IM(s, BOOST_PP_TUPLE_REM_3 st, elem)
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| 34 | # define BOOST_PP_SEQ_FILTER_O_IM(s, im, elem) BOOST_PP_SEQ_FILTER_O_I(s, im, elem)
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| 35 | # else
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| 36 | # define BOOST_PP_SEQ_FILTER_O(s, st, elem) BOOST_PP_SEQ_FILTER_O_I(s, BOOST_PP_TUPLE_ELEM(3, 0, st), BOOST_PP_TUPLE_ELEM(3, 1, st), BOOST_PP_TUPLE_ELEM(3, 2, st), elem)
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| 37 | # endif
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| 38 | #
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| 39 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_DMC()
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| 40 | # define BOOST_PP_SEQ_FILTER_O_I(s, pred, data, res, elem) (pred, data, res BOOST_PP_EXPR_IF(pred(s, data, elem), (elem)))
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| 41 | # else
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| 42 | # define BOOST_PP_SEQ_FILTER_O_I(s, pred, data, res, elem) (pred, data, res BOOST_PP_EXPR_IF(pred##(s, data, elem), (elem)))
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| 43 | # endif
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| 44 | #
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| 45 | # /* BOOST_PP_SEQ_FILTER_S */
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| 46 | #
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| 47 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
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| 48 | # define BOOST_PP_SEQ_FILTER_S(s, pred, data, seq) BOOST_PP_SEQ_TAIL(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_FILTER_O, (pred, data, (nil)), seq)))
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| 49 | # else
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| 50 | # define BOOST_PP_SEQ_FILTER_S(s, pred, data, seq) BOOST_PP_SEQ_FILTER_S_I(s, pred, data, seq)
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| 51 | # define BOOST_PP_SEQ_FILTER_S_I(s, pred, data, seq) BOOST_PP_SEQ_TAIL(BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_FOLD_LEFT_ ## s(BOOST_PP_SEQ_FILTER_O, (pred, data, (nil)), seq)))
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| 52 | # endif
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| 53 | #
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| 54 | # endif
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