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- /*=============================================================================
- 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
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