/*=============================================================================
Copyright (c) 2003 Joel de Guzman
Use, modification and distribution is subject to 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_SEQUENCE_DETAIL_FILTER_VIEW_BEGIN_END_TRAITS_HPP)
#define FUSION_SEQUENCE_DETAIL_FILTER_VIEW_BEGIN_END_TRAITS_HPP
#include <boost/spirit/fusion/detail/config.hpp>
namespace boost { namespace fusion
{
struct filter_view_tag;
template <typename View, typename Pred>
struct filter_view;
template <typename First, typename Last, typename Pred>
struct filter_iterator;
namespace meta
{
template <typename Tag>
struct begin_impl;
template <>
struct begin_impl<filter_view_tag>
{
template <typename Sequence>
struct apply
{
typedef typename Sequence::first_type first_type;
typedef typename Sequence::last_type last_type;
typedef typename Sequence::pred_type pred_type;
typedef filter_iterator<first_type, last_type, pred_type> type;
static type
call(Sequence& s)
{
return type(s.first);
}
};
};
template <typename Tag>
struct end_impl;
template <>
struct end_impl<filter_view_tag>
{
template <typename Sequence>
struct apply
{
typedef typename Sequence::last_type last_type;
typedef typename Sequence::pred_type pred_type;
typedef filter_iterator<last_type, last_type, pred_type> type;
static type
call(Sequence& s)
{
return type(s.last);
}
};
};
}
}}
namespace boost { namespace mpl
{
template <typename Tag>
struct begin_impl;
template <typename Tag>
struct end_impl;
template <>
struct begin_impl<fusion::filter_view_tag>
: fusion::meta::begin_impl<fusion::filter_view_tag> {};
template <>
struct end_impl<fusion::filter_view_tag>
: fusion::meta::end_impl<fusion::filter_view_tag> {};
}}
#endif