///////////////////////////////////////////////////////////////////////////// // // (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_DERIVATION_VALUE_TRAITS_HPP #define BOOST_INTRUSIVE_DERIVATION_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> #if defined(BOOST_HAS_PRAGMA_ONCE) # pragma once #endif namespace boost { namespace intrusive { //!This value traits template is used to create value traits //!from user defined node traits where value_traits::value_type will //!derive from node_traits::node template<class T, class NodeTraits, link_mode_type LinkMode #ifdef BOOST_INTRUSIVE_DOXYGEN_INVOKED = safe_link #endif > struct derivation_value_traits { public: typedef NodeTraits node_traits; typedef T value_type; typedef typename node_traits::node node; typedef typename node_traits::node_ptr node_ptr; typedef typename node_traits::const_node_ptr const_node_ptr; typedef typename pointer_traits<node_ptr>:: template rebind_pointer<value_type>::type pointer; typedef typename pointer_traits<node_ptr>:: template rebind_pointer<const value_type>::type const_pointer; typedef typename boost::intrusive:: pointer_traits<pointer>::reference reference; typedef typename boost::intrusive:: pointer_traits<const_pointer>::reference const_reference; static const link_mode_type link_mode = LinkMode; static node_ptr to_node_ptr(reference value) { return node_ptr(&value); } static const_node_ptr to_node_ptr(const_reference value) { return node_ptr(&value); } static pointer to_value_ptr(const node_ptr &n) { return pointer_traits<pointer>::pointer_to(static_cast<reference>(*n)); } static const_pointer to_value_ptr(const const_node_ptr &n) { return pointer_traits<pointer>::pointer_to(static_cast<const_reference>(*n)); } }; } //namespace intrusive } //namespace boost #include <boost/intrusive/detail/config_end.hpp> #endif //BOOST_INTRUSIVE_DERIVATION_VALUE_TRAITS_HPP