ceph/src/boost/boost/fusion/view/filter_view/filter_view_iterator.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   3     Copyright (c) 2018 Kohei Takahashi
   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_FILTER_VIEW_ITERATOR_05062005_0849)
   9 #define FUSION_FILTER_VIEW_ITERATOR_05062005_0849
  10
  11 #include <boost/fusion/support/config.hpp>
  12 #include <boost/fusion/iterator/mpl/convert_iterator.hpp>
  13 #include <boost/fusion/iterator/value_of.hpp>
  14 #include <boost/fusion/support/iterator_base.hpp>
  15 #include <boost/fusion/algorithm/query/detail/find_if.hpp>
  16 #include <boost/mpl/lambda.hpp>
  17 #include <boost/mpl/quote.hpp>
  18 #include <boost/mpl/bind.hpp>
  19 #include <boost/mpl/placeholders.hpp>
  20
  21 #include <boost/fusion/view/filter_view/detail/deref_impl.hpp>
  22 #include <boost/fusion/view/filter_view/detail/next_impl.hpp>
  23 #include <boost/fusion/view/filter_view/detail/value_of_impl.hpp>
  24 #include <boost/fusion/view/filter_view/detail/equal_to_impl.hpp>
  25 #include <boost/fusion/view/filter_view/detail/deref_data_impl.hpp>
  26 #include <boost/fusion/view/filter_view/detail/value_of_data_impl.hpp>
  27 #include <boost/fusion/view/filter_view/detail/key_of_impl.hpp>
  28
  29 namespace boost { namespace fusion
  30 {
  31     struct filter_view_iterator_tag;
  32     struct forward_traversal_tag;
  33
  34     template <typename Category, typename First, typename Last, typename Pred>
  35     struct filter_iterator : iterator_base<filter_iterator<Category, First, Last, Pred> >
  36     {
  37         typedef convert_iterator<First> first_converter;
  38         typedef typename first_converter::type first_iter;
  39         typedef convert_iterator<Last> last_converter;
  40         typedef typename last_converter::type last_iter;
  41
  42         typedef filter_view_iterator_tag fusion_tag;
  43         typedef Category category;
  44         typedef
  45             detail::static_find_if<
  46                 first_iter
  47               , last_iter
  48               , mpl::bind1<
  49                     typename mpl::lambda<Pred>::type
  50                   , mpl::bind1<mpl::quote1<result_of::value_of>,mpl::_1>
  51                 >
  52             >
  53         filter;
  54         typedef typename filter::type first_type;
  55         typedef last_iter last_type;
  56         typedef Pred pred_type;
  57
  58         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  59         filter_iterator(First const& in_first)
  60             : first(filter::iter_call(first_converter::call(in_first))) {}
  61
  62         first_type first;
  63
  64     private:
  65         // silence MSVC warning C4512: assignment operator could not be generated
  66         filter_iterator& operator= (filter_iterator const&);
  67     };
  68 }}
  69
  70 #ifdef BOOST_FUSION_WORKAROUND_FOR_LWG_2408
  71 namespace std
  72 {
  73     template <typename Category, typename First, typename Last, typename Pred>
  74     struct iterator_traits< ::boost::fusion::filter_iterator<Category, First, Last, Pred> >
  75     { };
  76 }
  77 #endif
  78
  79 #endif
  80
  81