ceph/src/boost/libs/intrusive/include/boost/intrusive/detail/key_nodeptr_comp.hpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga  2014-2014
   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_DETAIL_KEY_NODEPTR_COMP_HPP
  14 #define BOOST_INTRUSIVE_DETAIL_KEY_NODEPTR_COMP_HPP
  15
  16 #ifndef BOOST_CONFIG_HPP
  17 #  include <boost/config.hpp>
  18 #endif
  19
  20 #if defined(BOOST_HAS_PRAGMA_ONCE)
  21 #  pragma once
  22 #endif
  23
  24 #include <boost/intrusive/detail/mpl.hpp>
  25 #include <boost/intrusive/detail/ebo_functor_holder.hpp>
  26 #include <boost/intrusive/detail/tree_value_compare.hpp>
  27
  28
  29 namespace boost {
  30 namespace intrusive {
  31 namespace detail {
  32
  33 template < class KeyTypeKeyCompare
  34          , class ValueTraits
  35          , class KeyOfValue
  36          >
  37 struct key_nodeptr_comp_types
  38 {
  39    typedef ValueTraits                                   value_traits;
  40    typedef typename value_traits::value_type             value_type;
  41    typedef typename value_traits::node_ptr               node_ptr;
  42    typedef typename value_traits::const_node_ptr         const_node_ptr;
  43    typedef typename detail::if_c
  44             < detail::is_same<KeyOfValue, void>::value
  45             , detail::identity<value_type>
  46             , KeyOfValue
  47             >::type                                      key_of_value;
  48    typedef tree_value_compare
  49       <typename ValueTraits::pointer, KeyTypeKeyCompare, key_of_value>      base_t;
  50 };
  51
  52 //This function object transforms a key comparison type to
  53 //a function that can compare nodes or nodes with nodes or keys.
  54 template < class KeyTypeKeyCompare
  55          , class ValueTraits
  56          , class KeyOfValue = void
  57          >
  58 struct key_nodeptr_comp
  59    //Use public inheritance to avoid MSVC bugs with closures
  60    :  public key_nodeptr_comp_types<KeyTypeKeyCompare, ValueTraits, KeyOfValue>::base_t
  61 {
  62    typedef key_nodeptr_comp_types<KeyTypeKeyCompare, ValueTraits, KeyOfValue> types_t;
  63    typedef typename types_t::value_traits          value_traits;
  64    typedef typename types_t::value_type            value_type;
  65    typedef typename types_t::node_ptr              node_ptr;
  66    typedef typename types_t::const_node_ptr        const_node_ptr;
  67    typedef typename types_t::base_t                base_t;
  68    typedef typename types_t::key_of_value          key_of_value;
  69
  70    template <class P1>
  71    struct is_same_or_nodeptr_convertible
  72    {
  73       static const bool same_type = is_same<P1,const_node_ptr>::value || is_same<P1,node_ptr>::value;
  74       static const bool value = same_type || is_convertible<P1, const_node_ptr>::value;
  75    };
  76
  77    base_t base() const
  78    {  return static_cast<const base_t&>(*this); }
  79
  80    BOOST_INTRUSIVE_FORCEINLINE key_nodeptr_comp(KeyTypeKeyCompare kcomp, const ValueTraits *traits)
  81       :  base_t(kcomp), traits_(traits)
  82    {}
  83
  84    //pred(pnode)
  85    template<class T1>
  86    BOOST_INTRUSIVE_FORCEINLINE bool operator()(const T1 &t1, typename enable_if_c< is_same_or_nodeptr_convertible<T1>::value >::type* =0) const
  87    {  return base().get()(key_of_value()(*traits_->to_value_ptr(t1)));  }
  88
  89    //operator() 2 arg
  90    //pred(pnode, pnode)
  91    template<class T1, class T2>
  92    BOOST_INTRUSIVE_FORCEINLINE bool operator()
  93       (const T1 &t1, const T2 &t2, typename enable_if_c< is_same_or_nodeptr_convertible<T1>::value && is_same_or_nodeptr_convertible<T2>::value >::type* =0) const
  94    {  return base()(*traits_->to_value_ptr(t1), *traits_->to_value_ptr(t2));  }
  95
  96    //pred(pnode, key)
  97    template<class T1, class T2>
  98    BOOST_INTRUSIVE_FORCEINLINE bool operator()
  99       (const T1 &t1, const T2 &t2, typename enable_if_c< is_same_or_nodeptr_convertible<T1>::value && !is_same_or_nodeptr_convertible<T2>::value >::type* =0) const
 100    {  return base()(*traits_->to_value_ptr(t1), t2);  }
 101
 102    //pred(key, pnode)
 103    template<class T1, class T2>
 104    BOOST_INTRUSIVE_FORCEINLINE bool operator()
 105       (const T1 &t1, const T2 &t2, typename enable_if_c< !is_same_or_nodeptr_convertible<T1>::value && is_same_or_nodeptr_convertible<T2>::value >::type* =0) const
 106    {  return base()(t1, *traits_->to_value_ptr(t2));  }
 107
 108    //pred(key, key)
 109    template<class T1, class T2>
 110    BOOST_INTRUSIVE_FORCEINLINE bool operator()
 111       (const T1 &t1, const T2 &t2, typename enable_if_c< !is_same_or_nodeptr_convertible<T1>::value && !is_same_or_nodeptr_convertible<T2>::value >::type* =0) const
 112    {  return base()(t1, t2);  }
 113
 114    const ValueTraits *const traits_;
 115 };
 116
 117 }  //namespace detail{
 118 }  //namespace intrusive{
 119 }  //namespace boost{
 120
 121 #endif //BOOST_INTRUSIVE_DETAIL_KEY_NODEPTR_COMP_HPP