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1 /*=============================================================================
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2 Copyright (c) 2001-2011 Joel de Guzman
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3 Copyright (c) 2011 Eric Niebler
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4
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5 Distributed under the Boost Software License, Version 1.0. (See accompanying
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6 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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7 ==============================================================================*/
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8 #if !defined(FUSION_FIND_05052005_1107)
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9 #define FUSION_FIND_05052005_1107
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10
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11 #include <boost/fusion/support/config.hpp>
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12 #include <boost/fusion/algorithm/query/find_if_fwd.hpp>
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13 #include <boost/fusion/algorithm/query/detail/find_if.hpp>
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14 #include <boost/fusion/algorithm/query/detail/segmented_find.hpp>
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15 #include <boost/fusion/iterator/key_of.hpp>
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16 #include <boost/fusion/iterator/value_of.hpp>
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17 #include <boost/fusion/support/category_of.hpp>
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18 #include <boost/fusion/support/is_segmented.hpp>
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19 #include <boost/mpl/if.hpp>
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20 #include <boost/mpl/placeholders.hpp>
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21 #include <boost/type_traits/is_same.hpp>
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22 #include <boost/type_traits/is_const.hpp>
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23 #include <boost/utility/enable_if.hpp>
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24
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25 namespace boost { namespace fusion
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26 {
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27 namespace result_of
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28 {
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29 template <typename Sequence, typename T>
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30 struct find
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31 : mpl::if_<
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32 traits::is_segmented<Sequence>
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33 , detail::result_of_segmented_find<Sequence, T>
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34 , detail::result_of_find_if<
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35 Sequence,
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36 is_same<
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37 typename mpl::if_<
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38 traits::is_associative<Sequence>
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39 , key_of<mpl::_1>
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40 , value_of<mpl::_1>
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41 >::type
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42 , T
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43 >
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44 >
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45 >::type
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46 {};
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47 }
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48
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49 template <typename T, typename Sequence>
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50 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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51 inline typename
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52 lazy_disable_if<
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53 is_const<Sequence>
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54 , result_of::find<Sequence, T>
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55 >::type const
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56 find(Sequence& seq)
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57 {
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58 typedef typename result_of::find<Sequence, T>::filter filter;
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59 return filter::call(seq);
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60 }
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61
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62 template <typename T, typename Sequence>
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63 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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64 inline typename result_of::find<Sequence const, T>::type const
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65 find(Sequence const& seq)
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66 {
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67 typedef typename result_of::find<Sequence const, T>::filter filter;
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68 return filter::call(seq);
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69 }
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70 }}
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71
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72 #endif
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