boost/intrusive/trivial_value_traits.hpp
/////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2006-2013
//
// 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_TRIVIAL_VALUE_TRAITS_HPP
#define BOOST_INTRUSIVE_TRIVIAL_VALUE_TRAITS_HPP
#include <boost/intrusive/detail/config_begin.hpp>
#include <boost/intrusive/intrusive_fwd.hpp>
#include <boost/intrusive/link_mode.hpp>
#include <boost/intrusive/pointer_traits.hpp>
namespace boost {
namespace intrusive {
//!This value traits template is used to create value traits
//!from user defined node traits where value_traits::value_type and
//!node_traits::node should be equal
template<class NodeTraits, link_mode_type LinkMode
#ifdef BOOST_INTRUSIVE_DOXYGEN_INVOKED
= safe_link
#endif
>
struct trivial_value_traits
{
typedef NodeTraits node_traits;
typedef typename node_traits::node_ptr node_ptr;
typedef typename node_traits::const_node_ptr const_node_ptr;
typedef typename node_traits::node value_type;
typedef node_ptr pointer;
typedef const_node_ptr const_pointer;
static const link_mode_type link_mode = LinkMode;
static node_ptr to_node_ptr (value_type &value)
{ return pointer_traits<node_ptr>::pointer_to(value); }
static const_node_ptr to_node_ptr (const value_type &value)
{ return pointer_traits<const_node_ptr>::pointer_to(value); }
static const pointer & to_value_ptr(const node_ptr &n) { return n; }
static const const_pointer &to_value_ptr(const const_node_ptr &n) { return n; }
};
} //namespace intrusive
} //namespace boost
#include <boost/intrusive/detail/config_end.hpp>
#endif //BOOST_INTRUSIVE_TRIVIAL_VALUE_TRAITS_HPP