/*============================================================================= | |
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/type_traits/is_convertible.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 |