1 /*=============================================================================
2 Copyright (c) 2001-2011 Joel de Guzman
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_ADVANCE_09172005_1146)
8 #define FUSION_ADVANCE_09172005_1146
10 #include <boost/fusion/support/config.hpp>
11 #include <boost/fusion/iterator/detail/advance.hpp>
12 #include <boost/fusion/support/category_of.hpp>
14 #include <boost/mpl/int.hpp>
15 #include <boost/mpl/assert.hpp>
16 #include <boost/type_traits/is_same.hpp>
17 #include <boost/fusion/support/tag_of.hpp>
19 namespace boost { namespace fusion
21 struct random_access_traversal_tag;
24 struct iterator_facade_tag; // iterator facade tag
25 struct boost_array_iterator_tag; // boost::array iterator tag
26 struct mpl_iterator_tag; // mpl sequence iterator tag
27 struct std_pair_iterator_tag; // std::pair iterator tag
31 template <typename Tag>
34 // default implementation
35 template <typename Iterator, typename N>
39 , advance_detail::forward<Iterator, N::value>
40 , advance_detail::backward<Iterator, N::value>
43 BOOST_MPL_ASSERT_NOT((traits::is_random_access<Iterator>));
48 struct advance_impl<iterator_facade_tag>
50 template <typename Iterator, typename N>
51 struct apply : Iterator::template advance<Iterator, N> {};
55 struct advance_impl<boost_array_iterator_tag>;
58 struct advance_impl<mpl_iterator_tag>;
61 struct advance_impl<std_pair_iterator_tag>;
66 template <typename Iterator, int N>
68 : extension::advance_impl<typename detail::tag_of<Iterator>::type>::template apply<Iterator, mpl::int_<N> >
71 template <typename Iterator, typename N>
73 : extension::advance_impl<typename detail::tag_of<Iterator>::type>::template apply<Iterator, N>
77 template <int N, typename Iterator>
78 BOOST_FUSION_GPU_ENABLED
79 inline typename result_of::advance_c<Iterator, N>::type const
80 advance_c(Iterator const& i)
82 return result_of::advance_c<Iterator, N>::call(i);
85 template<typename N, typename Iterator>
86 BOOST_FUSION_GPU_ENABLED
87 inline typename result_of::advance<Iterator, N>::type const
88 advance(Iterator const& i)
90 return result_of::advance<Iterator, N>::call(i);
93 }} // namespace boost::fusion