1 | /*=============================================================================
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2 | Copyright (c) 2003 Joel de Guzman
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3 |
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4 | Use, modification and distribution is subject to the Boost Software
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5 | License, Version 1.0. (See 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 | #if !defined(FUSION_ALGORITHM_FILTER_HPP)
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9 | #define FUSION_ALGORITHM_FILTER_HPP
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10 |
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11 | #include <boost/spirit/fusion/sequence/filter_view.hpp>
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12 |
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13 | namespace boost { namespace fusion
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14 | {
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15 | namespace meta
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16 | {
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17 | template <typename Sequence, typename Pred>
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18 | struct filter
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19 | {
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20 | typedef filter_view<Sequence, Pred> type;
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21 | };
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22 | }
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23 |
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24 | namespace function
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25 | {
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26 | struct filter
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27 | {
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28 | template <typename Sequence, typename Pred>
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29 | struct apply : meta::filter<Sequence, Pred> {};
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30 |
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31 | template <typename Sequence, typename Pred>
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32 | typename apply<Sequence const, Pred>::type
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33 | operator()(Sequence const& seq, Pred) const
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34 | {
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35 | return filter_view<Sequence const, Pred>(seq);
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36 | }
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37 |
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38 | template <typename Sequence, typename Pred>
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39 | typename apply<Sequence, Pred>::type
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40 | operator()(Sequence& seq, Pred) const
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41 | {
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42 | return filter_view<Sequence, Pred>(seq);
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43 | }
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44 | };
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45 | }
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46 |
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47 | function::filter const filter = function::filter();
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48 | }}
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49 |
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50 | #endif
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51 |
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