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_NEXT_IMPL_07162005_0136)
8 #define FUSION_NEXT_IMPL_07162005_0136
10 #include <boost/fusion/iterator/next.hpp>
11 #include <boost/fusion/iterator/equal_to.hpp>
12 #include <boost/mpl/if.hpp>
14 namespace boost { namespace fusion
16 struct joint_view_iterator_tag;
18 template <typename Category, typename First, typename Last, typename Concat>
19 struct joint_view_iterator;
23 template <typename Tag>
27 struct next_impl<joint_view_iterator_tag>
29 template <typename Iterator>
32 typedef typename Iterator::first_type first_type;
33 typedef typename Iterator::last_type last_type;
34 typedef typename Iterator::concat_type concat_type;
35 typedef typename Iterator::category category;
36 typedef typename result_of::next<first_type>::type next_type;
37 typedef result_of::equal_to<next_type, last_type> equal_to;
43 , joint_view_iterator<category, next_type, last_type, concat_type>
48 call(Iterator const& i, mpl::true_)
54 call(Iterator const& i, mpl::false_)
56 return type(fusion::next(i.first), i.concat);
60 call(Iterator const& i)
62 return call(i, equal_to());