ceph/src/boost/libs/fusion/include/boost/fusion/algorithm/query/find.hpp

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