1 | # /* Copyright (C) 2001
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2 | # * Housemarque Oy
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3 | # * http://www.housemarque.com
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4 | # *
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5 | # * Distributed under the Boost Software License, Version 1.0. (See
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6 | # * accompanying file LICENSE_1_0.txt or copy at
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7 | # * http://www.boost.org/LICENSE_1_0.txt)
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8 | # */
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9 | #
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10 | # /* Revised by Paul Mensonides (2002) */
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11 | #
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12 | # /* See http://www.boost.org for most recent version. */
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13 | #
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14 | # ifndef BOOST_PREPROCESSOR_LIST_FILTER_HPP
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15 | # define BOOST_PREPROCESSOR_LIST_FILTER_HPP
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16 | #
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17 | # include <boost/preprocessor/config/config.hpp>
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18 | # include <boost/preprocessor/control/if.hpp>
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19 | # include <boost/preprocessor/list/fold_right.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_LIST_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_LIST_FILTER(pred, data, list) BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_LIST_FOLD_RIGHT(BOOST_PP_LIST_FILTER_O, (pred, data, BOOST_PP_NIL), list))
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27 | # else
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28 | # define BOOST_PP_LIST_FILTER(pred, data, list) BOOST_PP_LIST_FILTER_I(pred, data, list)
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29 | # define BOOST_PP_LIST_FILTER_I(pred, data, list) BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_LIST_FOLD_RIGHT(BOOST_PP_LIST_FILTER_O, (pred, data, BOOST_PP_NIL), list))
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30 | # endif
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31 | #
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32 | # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
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33 | # define BOOST_PP_LIST_FILTER_O(d, pdr, elem) BOOST_PP_LIST_FILTER_O_D(d, BOOST_PP_TUPLE_ELEM(3, 0, pdr), BOOST_PP_TUPLE_ELEM(3, 1, pdr), BOOST_PP_TUPLE_ELEM(3, 2, pdr), elem)
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34 | # else
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35 | # define BOOST_PP_LIST_FILTER_O(d, pdr, elem) BOOST_PP_LIST_FILTER_O_I(d, BOOST_PP_TUPLE_REM_3 pdr, elem)
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36 | # define BOOST_PP_LIST_FILTER_O_I(d, im, elem) BOOST_PP_LIST_FILTER_O_D(d, im, 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_LIST_FILTER_O_D(d, pred, data, res, elem) (pred, data, BOOST_PP_IF(pred(d, data, elem), (elem, res), res))
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41 | # else
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42 | # define BOOST_PP_LIST_FILTER_O_D(d, pred, data, res, elem) (pred, data, BOOST_PP_IF(pred##(d, data, elem), (elem, res), res))
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43 | # endif
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44 | #
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45 | # /* BOOST_PP_LIST_FILTER_D */
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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_LIST_FILTER_D(d, pred, data, list) BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_LIST_FOLD_RIGHT_ ## d(BOOST_PP_LIST_FILTER_O, (pred, data, BOOST_PP_NIL), list))
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49 | # else
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50 | # define BOOST_PP_LIST_FILTER_D(d, pred, data, list) BOOST_PP_LIST_FILTER_D_I(d, pred, data, list)
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51 | # define BOOST_PP_LIST_FILTER_D_I(d, pred, data, list) BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_LIST_FOLD_RIGHT_ ## d(BOOST_PP_LIST_FILTER_O, (pred, data, BOOST_PP_NIL), list))
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52 | # endif
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53 | #
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54 | # endif
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