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/*=============================================================================
Copyright (c) 2011 Eric Niebler
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(BOOST_FUSION_SINGLE_VIEW_DISTANCE_IMPL_JUL_07_2011_1348PM)
#define BOOST_FUSION_SINGLE_VIEW_DISTANCE_IMPL_JUL_07_2011_1348PM
#include <boost/fusion/support/config.hpp>
#include <boost/mpl/minus.hpp>
namespace boost { namespace fusion
{
struct single_view_iterator_tag;
namespace extension
{
template<typename Tag>
struct distance_impl;
template<>
struct distance_impl<single_view_iterator_tag>
{
template<typename First, typename Last>
struct apply
: mpl::minus<typename Last::position, typename First::position>
{
typedef typename mpl::minus<typename Last::position,
typename First::position>::type type;
BOOST_FUSION_GPU_ENABLED
static type
call(First const& /*first*/, Last const& /*last*/)
{
return type();
}
};
};
}
}}
#endif
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