| 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_DERIVATION_VALUE_TRAITS_HPP |
| 14 | #define BOOST_INTRUSIVE_DERIVATION_VALUE_TRAITS_HPP |
| 15 | |
| 16 | #include <boost/intrusive/detail/config_begin.hpp> |
| 17 | #include <boost/intrusive/intrusive_fwd.hpp> |
| 18 | #include <boost/intrusive/link_mode.hpp> |
| 19 | #include <boost/intrusive/pointer_traits.hpp> |
| 20 | |
| 21 | #if defined(BOOST_HAS_PRAGMA_ONCE) |
| 22 | # pragma once |
| 23 | #endif |
| 24 | |
| 25 | namespace boost { |
| 26 | namespace intrusive { |
| 27 | |
| 28 | //!This value traits template is used to create value traits |
| 29 | //!from user defined node traits where value_traits::value_type will |
| 30 | //!derive from node_traits::node |
| 31 | |
| 32 | template<class T, class NodeTraits, link_mode_type LinkMode |
| 33 | #ifdef BOOST_INTRUSIVE_DOXYGEN_INVOKED |
| 34 | = safe_link |
| 35 | #endif |
| 36 | > |
| 37 | struct derivation_value_traits |
| 38 | { |
| 39 | public: |
| 40 | typedef NodeTraits node_traits; |
| 41 | typedef T value_type; |
| 42 | typedef typename node_traits::node node; |
| 43 | typedef typename node_traits::node_ptr node_ptr; |
| 44 | typedef typename node_traits::const_node_ptr const_node_ptr; |
| 45 | typedef typename pointer_traits<node_ptr>:: |
| 46 | template rebind_pointer<value_type>::type pointer; |
| 47 | typedef typename pointer_traits<node_ptr>:: |
| 48 | template rebind_pointer<const value_type>::type const_pointer; |
| 49 | typedef typename boost::intrusive:: |
| 50 | pointer_traits<pointer>::reference reference; |
| 51 | typedef typename boost::intrusive:: |
| 52 | pointer_traits<const_pointer>::reference const_reference; |
| 53 | static const link_mode_type link_mode = LinkMode; |
| 54 | |
| 55 | static node_ptr to_node_ptr(reference value) |
| 56 | { return node_ptr(&value); } |
| 57 | |
| 58 | static const_node_ptr to_node_ptr(const_reference value) |
| 59 | { return node_ptr(&value); } |
| 60 | |
| 61 | static pointer to_value_ptr(const node_ptr &n) |
| 62 | { |
| 63 | return pointer_traits<pointer>::pointer_to(static_cast<reference>(*n)); |
| 64 | } |
| 65 | |
| 66 | static const_pointer to_value_ptr(const const_node_ptr &n) |
| 67 | { |
| 68 | return pointer_traits<pointer>::pointer_to(static_cast<const_reference>(*n)); |
| 69 | } |
| 70 | }; |
| 71 | |
| 72 | } //namespace intrusive |
| 73 | } //namespace boost |
| 74 | |
| 75 | #include <boost/intrusive/detail/config_end.hpp> |
| 76 | |
| 77 | #endif //BOOST_INTRUSIVE_DERIVATION_VALUE_TRAITS_HPP |
| 78 |