boost/intrusive/trivial_value_traits.hpp

0001 /////////////////////////////////////////////////////////////////////////////
0002 //
0003 // (C) Copyright Ion Gaztanaga  2006-2013
0004 //
0005 // Distributed under the Boost Software License, Version 1.0.
0006 //    (See accompanying file LICENSE_1_0.txt or copy at
0007 //          http://www.boost.org/LICENSE_1_0.txt)
0008 //
0009 // See http://www.boost.org/libs/intrusive for documentation.
0010 //
0011 /////////////////////////////////////////////////////////////////////////////
0012
0013 #ifndef BOOST_INTRUSIVE_TRIVIAL_VALUE_TRAITS_HPP
0014 #define BOOST_INTRUSIVE_TRIVIAL_VALUE_TRAITS_HPP
0015
0016 #include <boost/intrusive/detail/config_begin.hpp>
0017 #include <boost/intrusive/detail/workaround.hpp>
0018 #include <boost/intrusive/intrusive_fwd.hpp>
0019 #include <boost/intrusive/link_mode.hpp>
0020 #include <boost/intrusive/pointer_traits.hpp>
0021
0022 #if defined(BOOST_HAS_PRAGMA_ONCE)
0023 #  pragma once
0024 #endif
0025
0026 namespace boost {
0027 namespace intrusive {
0028
0029 //!This value traits template is used to create value traits
0030 //!from user defined node traits where value_traits::value_type and
0031 //!node_traits::node should be equal
0032 template<class NodeTraits, link_mode_type LinkMode
0033    #ifdef BOOST_INTRUSIVE_DOXYGEN_INVOKED
0034    = safe_link
0035    #endif
0036 >
0037 struct trivial_value_traits
0038 {
0039    typedef NodeTraits                                          node_traits;
0040    typedef typename node_traits::node_ptr                      node_ptr;
0041    typedef typename node_traits::const_node_ptr                const_node_ptr;
0042    typedef typename node_traits::node                          value_type;
0043    typedef node_ptr                                            pointer;
0044    typedef const_node_ptr                                      const_pointer;
0045    static const link_mode_type link_mode = LinkMode;
0046    BOOST_INTRUSIVE_FORCEINLINE static node_ptr       to_node_ptr (value_type &value) BOOST_NOEXCEPT
0047       {  return pointer_traits<node_ptr>::pointer_to(value);  }
0048    BOOST_INTRUSIVE_FORCEINLINE static const_node_ptr to_node_ptr (const value_type &value) BOOST_NOEXCEPT
0049       {  return pointer_traits<const_node_ptr>::pointer_to(value);  }
0050    BOOST_INTRUSIVE_FORCEINLINE static pointer  to_value_ptr(node_ptr n) BOOST_NOEXCEPT
0051       {  return n; }
0052    BOOST_INTRUSIVE_FORCEINLINE static const_pointer  to_value_ptr(const_node_ptr n) BOOST_NOEXCEPT
0053       {  return n; }
0054 };
0055
0056 } //namespace intrusive
0057 } //namespace boost
0058
0059 #include <boost/intrusive/detail/config_end.hpp>
0060
0061 #endif //BOOST_INTRUSIVE_TRIVIAL_VALUE_TRAITS_HPP