| /*============================================================================= |
| Copyright (c) 2001-2006 Joel de Guzman |
| |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| ==============================================================================*/ |
| #if !defined(FUSION_FUSION_ITERATOR_10012005_1551) |
| #define FUSION_FUSION_ITERATOR_10012005_1551 |
| |
| #include <boost/fusion/iterator/value_of.hpp> |
| #include <boost/fusion/iterator/next.hpp> |
| #include <boost/fusion/iterator/prior.hpp> |
| #include <boost/fusion/iterator/advance.hpp> |
| #include <boost/fusion/iterator/distance.hpp> |
| #include <boost/fusion/support/category_of.hpp> |
| #include <boost/mpl/next_prior.hpp> |
| #include <boost/mpl/advance_fwd.hpp> |
| #include <boost/mpl/distance_fwd.hpp> |
| #include <boost/mpl/iterator_tags.hpp> |
| #include <boost/mpl/eval_if.hpp> |
| #include <boost/type_traits/is_base_of.hpp> |
| |
| namespace boost { namespace fusion { namespace detail |
| { |
| |
| template<class Category> |
| struct to_mpl_category { |
| typedef typename mpl::eval_if< |
| is_base_of<random_access_traversal_tag, Category>, |
| mpl::random_access_iterator_tag, |
| mpl::eval_if< |
| is_base_of<bidirectional_traversal_tag, Category>, |
| mpl::bidirectional_iterator_tag, |
| mpl::forward_iterator_tag |
| > |
| >::type type; |
| }; |
| |
| }}} |
| |
| namespace boost { namespace mpl |
| { |
| template <typename Iterator> |
| struct fusion_iterator |
| { |
| typedef typename fusion::result_of::value_of<Iterator>::type type; |
| typedef typename fusion::traits::category_of<Iterator>::type fusion_category; |
| typedef typename fusion::detail::to_mpl_category<fusion_category>::type category; |
| typedef Iterator iterator; |
| }; |
| |
| template <typename Iterator> |
| struct next<fusion_iterator<Iterator> > |
| { |
| typedef fusion_iterator<typename fusion::result_of::next<Iterator>::type> type; |
| }; |
| |
| template <typename Iterator> |
| struct prior<fusion_iterator<Iterator> > |
| { |
| typedef fusion_iterator<typename fusion::result_of::prior<Iterator>::type> type; |
| }; |
| |
| template <typename Iterator, typename N> |
| struct advance<fusion_iterator<Iterator>, N> |
| { |
| typedef fusion_iterator<typename fusion::result_of::advance<Iterator, N>::type> type; |
| }; |
| |
| template <typename First, typename Last> |
| struct distance<fusion_iterator<First>, fusion_iterator<Last> > |
| : fusion::result_of::distance<First, Last> |
| {}; |
| |
| }} |
| |
| #endif |
| |
| |