Boost_1_39_0/boost/fusion/view/transform_view/transform_view_iterator.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2006 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_TRANSFORM_VIEW_ITERATOR_07162005_1033)
   8 #define FUSION_TRANSFORM_VIEW_ITERATOR_07162005_1033
   9
  10 #include <boost/fusion/support/iterator_base.hpp>
  11 #include <boost/fusion/support/category_of.hpp>
  12 #include <boost/fusion/iterator/mpl/convert_iterator.hpp>
  13 #include <boost/fusion/adapted/mpl/mpl_iterator.hpp>
  14 #include <boost/fusion/view/transform_view/detail/deref_impl.hpp>
  15 #include <boost/fusion/view/transform_view/detail/next_impl.hpp>
  16 #include <boost/fusion/view/transform_view/detail/prior_impl.hpp>
  17 #include <boost/fusion/view/transform_view/detail/value_of_impl.hpp>
  18 #include <boost/fusion/view/transform_view/detail/advance_impl.hpp>
  19 #include <boost/fusion/view/transform_view/detail/distance_impl.hpp>
  20 #include <boost/fusion/view/transform_view/detail/equal_to_impl.hpp>
  21
  22 namespace boost { namespace fusion
  23 {
  24     // Unary Version
  25     struct transform_view_iterator_tag;
  26
  27     template <typename First, typename F>
  28     struct transform_view_iterator
  29         : iterator_base<transform_view_iterator<First, F> >
  30     {
  31         typedef transform_view_iterator_tag fusion_tag;
  32         typedef convert_iterator<First> converter;
  33         typedef typename converter::type first_type;
  34         typedef typename traits::category_of<first_type>::type category;
  35         typedef F transform_type;
  36
  37         transform_view_iterator(First const& first, F const& f)
  38             : first(converter::call(first)), f(f) {}
  39
  40         first_type first;
  41         transform_type f;
  42     };
  43
  44     // Binary Version
  45     struct transform_view_iterator2_tag;
  46
  47     template <typename First1, typename First2, typename F>
  48     struct transform_view_iterator2
  49         : iterator_base<transform_view_iterator2<First1, First2, F> >
  50     {
  51         typedef transform_view_iterator2_tag fusion_tag;
  52         typedef convert_iterator<First1> converter1;
  53         typedef convert_iterator<First2> converter2;
  54         typedef typename converter1::type first1_type;
  55         typedef typename converter2::type first2_type;
  56         typedef typename traits::category_of<first1_type>::type category;
  57         typedef F transform_type;
  58
  59         transform_view_iterator2(First1 const& first1, First2 const& first2, F const& f)
  60             : first1(converter1::call(first1)), first2(converter2::call(first2)), f(f) {}
  61
  62         first1_type first1;
  63         first2_type first2;
  64         transform_type f;
  65     };
  66 }}
  67
  68 #endif
  69