ceph/src/boost/libs/intrusive/include/boost/intrusive/trivial_value_traits.hpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga  2006-2013
   4 //
   5 // Distributed under the Boost Software License, Version 1.0.
   6 //    (See accompanying file LICENSE_1_0.txt or copy at
   7 //          http://www.boost.org/LICENSE_1_0.txt)
   8 //
   9 // See http://www.boost.org/libs/intrusive for documentation.
  10 //
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef BOOST_INTRUSIVE_TRIVIAL_VALUE_TRAITS_HPP
  14 #define BOOST_INTRUSIVE_TRIVIAL_VALUE_TRAITS_HPP
  15
  16 #include <boost/intrusive/detail/config_begin.hpp>
  17 #include <boost/intrusive/detail/workaround.hpp>
  18 #include <boost/intrusive/intrusive_fwd.hpp>
  19 #include <boost/intrusive/link_mode.hpp>
  20 #include <boost/intrusive/pointer_traits.hpp>
  21
  22 #if defined(BOOST_HAS_PRAGMA_ONCE)
  23 #  pragma once
  24 #endif
  25
  26 namespace boost {
  27 namespace intrusive {
  28
  29 //!This value traits template is used to create value traits
  30 //!from user defined node traits where value_traits::value_type and
  31 //!node_traits::node should be equal
  32 template<class NodeTraits, link_mode_type LinkMode
  33    #ifdef BOOST_INTRUSIVE_DOXYGEN_INVOKED
  34    = safe_link
  35    #endif
  36 >
  37 struct trivial_value_traits
  38 {
  39    typedef NodeTraits                                          node_traits;
  40    typedef typename node_traits::node_ptr                      node_ptr;
  41    typedef typename node_traits::const_node_ptr                const_node_ptr;
  42    typedef typename node_traits::node                          value_type;
  43    typedef node_ptr                                            pointer;
  44    typedef const_node_ptr                                      const_pointer;
  45    static const link_mode_type link_mode = LinkMode;
  46    BOOST_INTRUSIVE_FORCEINLINE static node_ptr       to_node_ptr (value_type &value)
  47       {  return pointer_traits<node_ptr>::pointer_to(value);  }
  48    BOOST_INTRUSIVE_FORCEINLINE static const_node_ptr to_node_ptr (const value_type &value)
  49       {  return pointer_traits<const_node_ptr>::pointer_to(value);  }
  50    BOOST_INTRUSIVE_FORCEINLINE static const pointer  &      to_value_ptr(const node_ptr &n)        {  return n; }
  51    BOOST_INTRUSIVE_FORCEINLINE static const const_pointer  &to_value_ptr(const const_node_ptr &n)  {  return n; }
  52 };
  53
  54 } //namespace intrusive
  55 } //namespace boost
  56
  57 #include <boost/intrusive/detail/config_end.hpp>
  58
  59 #endif //BOOST_INTRUSIVE_TRIVIAL_VALUE_TRAITS_HPP