boost/fusion/view/joint_view/joint_view_iterator.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7 #if !defined(FUSION_JOINT_VIEW_ITERATOR_07162005_0140)
   8 #define FUSION_JOINT_VIEW_ITERATOR_07162005_0140
   9
  10 #include <boost/fusion/support/iterator_base.hpp>
  11 #include <boost/fusion/iterator/equal_to.hpp>
  12 #include <boost/fusion/iterator/mpl/convert_iterator.hpp>
  13 #include <boost/fusion/adapted/mpl/mpl_iterator.hpp>
  14 #include <boost/fusion/view/joint_view/detail/deref_impl.hpp>
  15 #include <boost/fusion/view/joint_view/detail/next_impl.hpp>
  16 #include <boost/fusion/view/joint_view/detail/value_of_impl.hpp>
  17 #include <boost/fusion/view/joint_view/detail/deref_data_impl.hpp>
  18 #include <boost/fusion/view/joint_view/detail/value_of_data_impl.hpp>
  19 #include <boost/fusion/view/joint_view/detail/key_of_impl.hpp>
  20 #include <boost/static_assert.hpp>
  21
  22 namespace boost { namespace fusion
  23 {
  24     struct joint_view_iterator_tag;
  25     struct forward_traversal_tag;
  26
  27     template <typename Category, typename First, typename Last, typename Concat>
  28     struct joint_view_iterator
  29         : iterator_base<joint_view_iterator<Category, First, Last, Concat> >
  30     {
  31         typedef convert_iterator<First> first_converter;
  32         typedef convert_iterator<Last> last_converter;
  33         typedef convert_iterator<Concat> concat_converter;
  34
  35         typedef typename first_converter::type first_type;
  36         typedef typename last_converter::type last_type;
  37         typedef typename concat_converter::type concat_type;
  38
  39         typedef joint_view_iterator_tag fusion_tag;
  40         typedef Category category;
  41         BOOST_STATIC_ASSERT((!result_of::equal_to<first_type, last_type>::value));
  42
  43         joint_view_iterator(First const& in_first, Concat const& in_concat)
  44             : first(first_converter::call(in_first))
  45             , concat(concat_converter::call(in_concat))
  46         {}
  47
  48         first_type first;
  49         concat_type concat;
  50
  51     private:
  52         // silence MSVC warning C4512: assignment operator could not be generated
  53         joint_view_iterator& operator= (joint_view_iterator const&);
  54     };
  55 }}
  56
  57 #endif
  58
  59