44 lines
1.4 KiB
C++
Executable File
44 lines
1.4 KiB
C++
Executable File
/*=============================================================================
|
|
Copyright (c) 2001-2011 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_DISTANCE_IMPL_09172005_0751)
|
|
#define FUSION_DISTANCE_IMPL_09172005_0751
|
|
|
|
#include <boost/fusion/support/config.hpp>
|
|
#include <boost/mpl/minus.hpp>
|
|
|
|
namespace boost { namespace fusion
|
|
{
|
|
struct vector_iterator_tag;
|
|
|
|
namespace extension
|
|
{
|
|
template <typename Tag>
|
|
struct distance_impl;
|
|
|
|
template <>
|
|
struct distance_impl<vector_iterator_tag>
|
|
{
|
|
template <typename First, typename Last>
|
|
struct apply : mpl::minus<typename Last::index, typename First::index>
|
|
{
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static typename mpl::minus<
|
|
typename Last::index, typename First::index>::type
|
|
call(First const&, Last const&)
|
|
{
|
|
typedef typename mpl::minus<
|
|
typename Last::index, typename First::index>::type
|
|
result;
|
|
return result();
|
|
}
|
|
};
|
|
};
|
|
}
|
|
}}
|
|
|
|
#endif
|