/*=============================================================================
    Copyright (c) 2007 Tobias Schwinger

    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_SEQUENCE_EMPTY_IMPL_HPP_INCLUDED)
#define BOOST_FUSION_SEQUENCE_EMPTY_IMPL_HPP_INCLUDED

#include <boost/fusion/support/config.hpp>
#include <boost/type_traits/is_convertible.hpp>
#include <boost/fusion/container/list/nil.hpp>

namespace boost {
namespace fusion {
struct cons_tag;

struct nil_;

template <typename Car, typename Cdr>
struct cons;

namespace extension {
template <typename Tag>
struct empty_impl;

template <>
struct empty_impl<cons_tag>
{
    template <typename Sequence>
    struct apply
        : boost::is_convertible<Sequence, nil_>
    {};
};
}
}
}

#endif
