1 /*=============================================================================
2 Copyright (c) 2011 Eric Niebler
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 ==============================================================================*/
8 #if !defined(BOOST_FUSION_SINGLE_VIEW_DISTANCE_IMPL_JUL_07_2011_1348PM)
9 #define BOOST_FUSION_SINGLE_VIEW_DISTANCE_IMPL_JUL_07_2011_1348PM
11 #include <boost/fusion/support/config.hpp>
12 #include <boost/mpl/minus.hpp>
14 namespace boost { namespace fusion
16 struct single_view_iterator_tag;
20 template<typename Tag>
24 struct distance_impl<single_view_iterator_tag>
26 template<typename First, typename Last>
28 : mpl::minus<typename Last::position, typename First::position>
30 typedef typename mpl::minus<typename Last::position,
31 typename First::position>::type type;
33 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
35 call(First const& /*first*/, Last const& /*last*/)