member_value_traits.hpp 3.4 KB

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  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. #ifndef BOOST_INTRUSIVE_MEMBER_VALUE_TRAITS_HPP
  13. #define BOOST_INTRUSIVE_MEMBER_VALUE_TRAITS_HPP
  14. #include <boost/intrusive/detail/config_begin.hpp>
  15. #include <boost/intrusive/intrusive_fwd.hpp>
  16. #include <boost/intrusive/link_mode.hpp>
  17. #include <boost/intrusive/detail/parent_from_member.hpp>
  18. #include <boost/intrusive/pointer_traits.hpp>
  19. #if defined(BOOST_HAS_PRAGMA_ONCE)
  20. # pragma once
  21. #endif
  22. namespace boost {
  23. namespace intrusive {
  24. //!This value traits template is used to create value traits
  25. //!from user defined node traits where value_traits::value_type will
  26. //!store a node_traits::node
  27. template< class T, class NodeTraits
  28. , typename NodeTraits::node T::* PtrToMember
  29. , link_mode_type LinkMode
  30. #ifdef BOOST_INTRUSIVE_DOXYGEN_INVOKED
  31. = safe_link
  32. #endif
  33. >
  34. struct member_value_traits
  35. {
  36. public:
  37. typedef NodeTraits node_traits;
  38. typedef T value_type;
  39. typedef typename node_traits::node node;
  40. typedef typename node_traits::node_ptr node_ptr;
  41. typedef typename node_traits::const_node_ptr const_node_ptr;
  42. typedef pointer_traits<node_ptr> node_ptr_traits;
  43. typedef typename pointer_traits<node_ptr>::template
  44. rebind_pointer<T>::type pointer;
  45. typedef typename pointer_traits<node_ptr>::template
  46. rebind_pointer<const T>::type const_pointer;
  47. //typedef typename pointer_traits<pointer>::reference reference;
  48. //typedef typename pointer_traits<const_pointer>::reference const_reference;
  49. typedef value_type & reference;
  50. typedef const value_type & const_reference;
  51. static const link_mode_type link_mode = LinkMode;
  52. BOOST_INTRUSIVE_FORCEINLINE static node_ptr to_node_ptr(reference value)
  53. { return pointer_traits<node_ptr>::pointer_to(value.*PtrToMember); }
  54. BOOST_INTRUSIVE_FORCEINLINE static const_node_ptr to_node_ptr(const_reference value)
  55. { return pointer_traits<const_node_ptr>::pointer_to(value.*PtrToMember); }
  56. BOOST_INTRUSIVE_FORCEINLINE static pointer to_value_ptr(const node_ptr &n)
  57. {
  58. return pointer_traits<pointer>::pointer_to(*detail::parent_from_member<value_type, node>
  59. (boost::intrusive::detail::to_raw_pointer(n), PtrToMember));
  60. }
  61. BOOST_INTRUSIVE_FORCEINLINE static const_pointer to_value_ptr(const const_node_ptr &n)
  62. {
  63. return pointer_traits<const_pointer>::pointer_to(*detail::parent_from_member<value_type, node>
  64. (boost::intrusive::detail::to_raw_pointer(n), PtrToMember));
  65. }
  66. };
  67. } //namespace intrusive
  68. } //namespace boost
  69. #include <boost/intrusive/detail/config_end.hpp>
  70. #endif //BOOST_INTRUSIVE_MEMBER_VALUE_TRAITS_HPP