boost/intrusive/detail/empty_node_checker.hpp

/////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga  2014-2014
//
// 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)
//
// See http://www.boost.org/libs/intrusive for documentation.
//
/////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_INTRUSIVE_DETAIL_EMPTY_NODE_CHECKER_HPP
#define BOOST_INTRUSIVE_DETAIL_EMPTY_NODE_CHECKER_HPP
#ifndef BOOST_CONFIG_HPP
#  include <boost/config.hpp>
#endif
#if defined(BOOST_HAS_PRAGMA_ONCE)
#  pragma once
#endif
namespace boost {
namespace intrusive {
namespace detail {
template<class ValueTraits>
struct empty_node_checker
{
   typedef ValueTraits                             value_traits;
   typedef typename value_traits::node_traits      node_traits;
   typedef typename node_traits::const_node_ptr    const_node_ptr;
   struct return_type {};
   void operator () (const const_node_ptr&, const return_type&, const return_type&, return_type&) {}
};
}  //namespace detail{
}  //namespace intrusive{
}  //namespace boost{
#endif //BOOST_INTRUSIVE_DETAIL_EMPTY_NODE_CHECKER_HPP