Update of /cvsroot/boost/boost/boost/fusion/sequence/container/list/detail
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv22842/detail
Added Files:
empty_impl.hpp
Log Message:
adds O(1) empty implementation
--- NEW FILE: empty_impl.hpp ---
/*=============================================================================
Copyright (c) 2007 Tobias Schwinger
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(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
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