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common: intrusive_red_black_tree: Various updates.

This commit is contained in:
bunnei 2022-03-10 22:55:05 -08:00
parent cd07a43724
commit 69c2faeb6a
1 changed files with 212 additions and 183 deletions

View File

@ -4,6 +4,8 @@
#pragma once
#include "common/alignment.h"
#include "common/common_funcs.h"
#include "common/parent_of_member.h"
#include "common/tree.h"
@ -15,32 +17,33 @@ class IntrusiveRedBlackTreeImpl;
}
#pragma pack(push, 4)
struct IntrusiveRedBlackTreeNode {
YUZU_NON_COPYABLE(IntrusiveRedBlackTreeNode);
public:
using EntryType = RBEntry<IntrusiveRedBlackTreeNode>;
constexpr IntrusiveRedBlackTreeNode() = default;
void SetEntry(const EntryType& new_entry) {
entry = new_entry;
}
[[nodiscard]] EntryType& GetEntry() {
return entry;
}
[[nodiscard]] const EntryType& GetEntry() const {
return entry;
}
using RBEntry = freebsd::RBEntry<IntrusiveRedBlackTreeNode>;
private:
EntryType entry{};
RBEntry m_entry;
friend class impl::IntrusiveRedBlackTreeImpl;
public:
explicit IntrusiveRedBlackTreeNode() = default;
template <class, class, class>
friend class IntrusiveRedBlackTree;
[[nodiscard]] constexpr RBEntry& GetRBEntry() {
return m_entry;
}
[[nodiscard]] constexpr const RBEntry& GetRBEntry() const {
return m_entry;
}
constexpr void SetRBEntry(const RBEntry& entry) {
m_entry = entry;
}
};
static_assert(sizeof(IntrusiveRedBlackTreeNode) ==
3 * sizeof(void*) + std::max<size_t>(sizeof(freebsd::RBColor), 4));
#pragma pack(pop)
template <class T, class Traits, class Comparator>
class IntrusiveRedBlackTree;
@ -48,12 +51,17 @@ class IntrusiveRedBlackTree;
namespace impl {
class IntrusiveRedBlackTreeImpl {
YUZU_NON_COPYABLE(IntrusiveRedBlackTreeImpl);
private:
template <class, class, class>
friend class ::Common::IntrusiveRedBlackTree;
using RootType = RBHead<IntrusiveRedBlackTreeNode>;
RootType root;
private:
using RootType = freebsd::RBHead<IntrusiveRedBlackTreeNode>;
private:
RootType m_root;
public:
template <bool Const>
@ -81,149 +89,150 @@ public:
IntrusiveRedBlackTreeImpl::reference>;
private:
pointer node;
pointer m_node;
public:
explicit Iterator(pointer n) : node(n) {}
constexpr explicit Iterator(pointer n) : m_node(n) {}
bool operator==(const Iterator& rhs) const {
return this->node == rhs.node;
constexpr bool operator==(const Iterator& rhs) const {
return m_node == rhs.m_node;
}
bool operator!=(const Iterator& rhs) const {
constexpr bool operator!=(const Iterator& rhs) const {
return !(*this == rhs);
}
pointer operator->() const {
return this->node;
constexpr pointer operator->() const {
return m_node;
}
reference operator*() const {
return *this->node;
constexpr reference operator*() const {
return *m_node;
}
Iterator& operator++() {
this->node = GetNext(this->node);
constexpr Iterator& operator++() {
m_node = GetNext(m_node);
return *this;
}
Iterator& operator--() {
this->node = GetPrev(this->node);
constexpr Iterator& operator--() {
m_node = GetPrev(m_node);
return *this;
}
Iterator operator++(int) {
constexpr Iterator operator++(int) {
const Iterator it{*this};
++(*this);
return it;
}
Iterator operator--(int) {
constexpr Iterator operator--(int) {
const Iterator it{*this};
--(*this);
return it;
}
operator Iterator<true>() const {
return Iterator<true>(this->node);
constexpr operator Iterator<true>() const {
return Iterator<true>(m_node);
}
};
private:
// Define accessors using RB_* functions.
bool EmptyImpl() const {
return root.IsEmpty();
constexpr bool EmptyImpl() const {
return m_root.IsEmpty();
}
IntrusiveRedBlackTreeNode* GetMinImpl() const {
return RB_MIN(const_cast<RootType*>(&root));
constexpr IntrusiveRedBlackTreeNode* GetMinImpl() const {
return freebsd::RB_MIN(const_cast<RootType&>(m_root));
}
IntrusiveRedBlackTreeNode* GetMaxImpl() const {
return RB_MAX(const_cast<RootType*>(&root));
constexpr IntrusiveRedBlackTreeNode* GetMaxImpl() const {
return freebsd::RB_MAX(const_cast<RootType&>(m_root));
}
IntrusiveRedBlackTreeNode* RemoveImpl(IntrusiveRedBlackTreeNode* node) {
return RB_REMOVE(&root, node);
constexpr IntrusiveRedBlackTreeNode* RemoveImpl(IntrusiveRedBlackTreeNode* node) {
return freebsd::RB_REMOVE(m_root, node);
}
public:
static IntrusiveRedBlackTreeNode* GetNext(IntrusiveRedBlackTreeNode* node) {
return RB_NEXT(node);
static constexpr IntrusiveRedBlackTreeNode* GetNext(IntrusiveRedBlackTreeNode* node) {
return freebsd::RB_NEXT(node);
}
static IntrusiveRedBlackTreeNode* GetPrev(IntrusiveRedBlackTreeNode* node) {
return RB_PREV(node);
static constexpr IntrusiveRedBlackTreeNode* GetPrev(IntrusiveRedBlackTreeNode* node) {
return freebsd::RB_PREV(node);
}
static const IntrusiveRedBlackTreeNode* GetNext(const IntrusiveRedBlackTreeNode* node) {
static constexpr IntrusiveRedBlackTreeNode const* GetNext(
IntrusiveRedBlackTreeNode const* node) {
return static_cast<const IntrusiveRedBlackTreeNode*>(
GetNext(const_cast<IntrusiveRedBlackTreeNode*>(node)));
}
static const IntrusiveRedBlackTreeNode* GetPrev(const IntrusiveRedBlackTreeNode* node) {
static constexpr IntrusiveRedBlackTreeNode const* GetPrev(
IntrusiveRedBlackTreeNode const* node) {
return static_cast<const IntrusiveRedBlackTreeNode*>(
GetPrev(const_cast<IntrusiveRedBlackTreeNode*>(node)));
}
public:
constexpr IntrusiveRedBlackTreeImpl() {}
constexpr IntrusiveRedBlackTreeImpl() = default;
// Iterator accessors.
iterator begin() {
constexpr iterator begin() {
return iterator(this->GetMinImpl());
}
const_iterator begin() const {
constexpr const_iterator begin() const {
return const_iterator(this->GetMinImpl());
}
iterator end() {
constexpr iterator end() {
return iterator(static_cast<IntrusiveRedBlackTreeNode*>(nullptr));
}
const_iterator end() const {
constexpr const_iterator end() const {
return const_iterator(static_cast<const IntrusiveRedBlackTreeNode*>(nullptr));
}
const_iterator cbegin() const {
constexpr const_iterator cbegin() const {
return this->begin();
}
const_iterator cend() const {
constexpr const_iterator cend() const {
return this->end();
}
iterator iterator_to(reference ref) {
return iterator(&ref);
constexpr iterator iterator_to(reference ref) {
return iterator(std::addressof(ref));
}
const_iterator iterator_to(const_reference ref) const {
return const_iterator(&ref);
constexpr const_iterator iterator_to(const_reference ref) const {
return const_iterator(std::addressof(ref));
}
// Content management.
bool empty() const {
constexpr bool empty() const {
return this->EmptyImpl();
}
reference back() {
constexpr reference back() {
return *this->GetMaxImpl();
}
const_reference back() const {
constexpr const_reference back() const {
return *this->GetMaxImpl();
}
reference front() {
constexpr reference front() {
return *this->GetMinImpl();
}
const_reference front() const {
constexpr const_reference front() const {
return *this->GetMinImpl();
}
iterator erase(iterator it) {
constexpr iterator erase(iterator it) {
auto cur = std::addressof(*it);
auto next = GetNext(cur);
this->RemoveImpl(cur);
@ -234,16 +243,16 @@ public:
} // namespace impl
template <typename T>
concept HasLightCompareType = requires {
{ std::is_same<typename T::LightCompareType, void>::value } -> std::convertible_to<bool>;
concept HasRedBlackKeyType = requires {
{ std::is_same<typename T::RedBlackKeyType, void>::value } -> std::convertible_to<bool>;
};
namespace impl {
template <typename T, typename Default>
consteval auto* GetLightCompareType() {
if constexpr (HasLightCompareType<T>) {
return static_cast<typename T::LightCompareType*>(nullptr);
consteval auto* GetRedBlackKeyType() {
if constexpr (HasRedBlackKeyType<T>) {
return static_cast<typename T::RedBlackKeyType*>(nullptr);
} else {
return static_cast<Default*>(nullptr);
}
@ -252,16 +261,17 @@ namespace impl {
} // namespace impl
template <typename T, typename Default>
using LightCompareType = std::remove_pointer_t<decltype(impl::GetLightCompareType<T, Default>())>;
using RedBlackKeyType = std::remove_pointer_t<decltype(impl::GetRedBlackKeyType<T, Default>())>;
template <class T, class Traits, class Comparator>
class IntrusiveRedBlackTree {
YUZU_NON_COPYABLE(IntrusiveRedBlackTree);
public:
using ImplType = impl::IntrusiveRedBlackTreeImpl;
private:
ImplType impl{};
ImplType m_impl;
public:
template <bool Const>
@ -277,9 +287,9 @@ public:
using iterator = Iterator<false>;
using const_iterator = Iterator<true>;
using light_value_type = LightCompareType<Comparator, value_type>;
using const_light_pointer = const light_value_type*;
using const_light_reference = const light_value_type&;
using key_type = RedBlackKeyType<Comparator, value_type>;
using const_key_pointer = const key_type*;
using const_key_reference = const key_type&;
template <bool Const>
class Iterator {
@ -298,183 +308,201 @@ public:
IntrusiveRedBlackTree::reference>;
private:
ImplIterator iterator;
ImplIterator m_impl;
private:
explicit Iterator(ImplIterator it) : iterator(it) {}
constexpr explicit Iterator(ImplIterator it) : m_impl(it) {}
explicit Iterator(typename std::conditional<Const, ImplType::const_iterator,
ImplType::iterator>::type::pointer ptr)
: iterator(ptr) {}
constexpr explicit Iterator(typename ImplIterator::pointer p) : m_impl(p) {}
ImplIterator GetImplIterator() const {
return this->iterator;
constexpr ImplIterator GetImplIterator() const {
return m_impl;
}
public:
bool operator==(const Iterator& rhs) const {
return this->iterator == rhs.iterator;
constexpr bool operator==(const Iterator& rhs) const {
return m_impl == rhs.m_impl;
}
bool operator!=(const Iterator& rhs) const {
constexpr bool operator!=(const Iterator& rhs) const {
return !(*this == rhs);
}
pointer operator->() const {
return Traits::GetParent(std::addressof(*this->iterator));
constexpr pointer operator->() const {
return Traits::GetParent(std::addressof(*m_impl));
}
reference operator*() const {
return *Traits::GetParent(std::addressof(*this->iterator));
constexpr reference operator*() const {
return *Traits::GetParent(std::addressof(*m_impl));
}
Iterator& operator++() {
++this->iterator;
constexpr Iterator& operator++() {
++m_impl;
return *this;
}
Iterator& operator--() {
--this->iterator;
constexpr Iterator& operator--() {
--m_impl;
return *this;
}
Iterator operator++(int) {
constexpr Iterator operator++(int) {
const Iterator it{*this};
++this->iterator;
++m_impl;
return it;
}
Iterator operator--(int) {
constexpr Iterator operator--(int) {
const Iterator it{*this};
--this->iterator;
--m_impl;
return it;
}
operator Iterator<true>() const {
return Iterator<true>(this->iterator);
constexpr operator Iterator<true>() const {
return Iterator<true>(m_impl);
}
};
private:
static int CompareImpl(const IntrusiveRedBlackTreeNode* lhs,
const IntrusiveRedBlackTreeNode* rhs) {
static constexpr int CompareImpl(const IntrusiveRedBlackTreeNode* lhs,
const IntrusiveRedBlackTreeNode* rhs) {
return Comparator::Compare(*Traits::GetParent(lhs), *Traits::GetParent(rhs));
}
static int LightCompareImpl(const void* elm, const IntrusiveRedBlackTreeNode* rhs) {
return Comparator::Compare(*static_cast<const_light_pointer>(elm), *Traits::GetParent(rhs));
static constexpr int CompareKeyImpl(const_key_reference key,
const IntrusiveRedBlackTreeNode* rhs) {
return Comparator::Compare(key, *Traits::GetParent(rhs));
}
// Define accessors using RB_* functions.
IntrusiveRedBlackTreeNode* InsertImpl(IntrusiveRedBlackTreeNode* node) {
return RB_INSERT(&impl.root, node, CompareImpl);
constexpr IntrusiveRedBlackTreeNode* InsertImpl(IntrusiveRedBlackTreeNode* node) {
return freebsd::RB_INSERT(m_impl.m_root, node, CompareImpl);
}
IntrusiveRedBlackTreeNode* FindImpl(const IntrusiveRedBlackTreeNode* node) const {
return RB_FIND(const_cast<ImplType::RootType*>(&impl.root),
const_cast<IntrusiveRedBlackTreeNode*>(node), CompareImpl);
constexpr IntrusiveRedBlackTreeNode* FindImpl(IntrusiveRedBlackTreeNode const* node) const {
return freebsd::RB_FIND(const_cast<ImplType::RootType&>(m_impl.m_root),
const_cast<IntrusiveRedBlackTreeNode*>(node), CompareImpl);
}
IntrusiveRedBlackTreeNode* NFindImpl(const IntrusiveRedBlackTreeNode* node) const {
return RB_NFIND(const_cast<ImplType::RootType*>(&impl.root),
const_cast<IntrusiveRedBlackTreeNode*>(node), CompareImpl);
constexpr IntrusiveRedBlackTreeNode* NFindImpl(IntrusiveRedBlackTreeNode const* node) const {
return freebsd::RB_NFIND(const_cast<ImplType::RootType&>(m_impl.m_root),
const_cast<IntrusiveRedBlackTreeNode*>(node), CompareImpl);
}
IntrusiveRedBlackTreeNode* FindLightImpl(const_light_pointer lelm) const {
return RB_FIND_LIGHT(const_cast<ImplType::RootType*>(&impl.root),
static_cast<const void*>(lelm), LightCompareImpl);
constexpr IntrusiveRedBlackTreeNode* FindKeyImpl(const_key_reference key) const {
return freebsd::RB_FIND_KEY(const_cast<ImplType::RootType&>(m_impl.m_root), key,
CompareKeyImpl);
}
IntrusiveRedBlackTreeNode* NFindLightImpl(const_light_pointer lelm) const {
return RB_NFIND_LIGHT(const_cast<ImplType::RootType*>(&impl.root),
static_cast<const void*>(lelm), LightCompareImpl);
constexpr IntrusiveRedBlackTreeNode* NFindKeyImpl(const_key_reference key) const {
return freebsd::RB_NFIND_KEY(const_cast<ImplType::RootType&>(m_impl.m_root), key,
CompareKeyImpl);
}
constexpr IntrusiveRedBlackTreeNode* FindExistingImpl(
IntrusiveRedBlackTreeNode const* node) const {
return freebsd::RB_FIND_EXISTING(const_cast<ImplType::RootType&>(m_impl.m_root),
const_cast<IntrusiveRedBlackTreeNode*>(node), CompareImpl);
}
constexpr IntrusiveRedBlackTreeNode* FindExistingKeyImpl(const_key_reference key) const {
return freebsd::RB_FIND_EXISTING_KEY(const_cast<ImplType::RootType&>(m_impl.m_root), key,
CompareKeyImpl);
}
public:
constexpr IntrusiveRedBlackTree() = default;
// Iterator accessors.
iterator begin() {
return iterator(this->impl.begin());
constexpr iterator begin() {
return iterator(m_impl.begin());
}
const_iterator begin() const {
return const_iterator(this->impl.begin());
constexpr const_iterator begin() const {
return const_iterator(m_impl.begin());
}
iterator end() {
return iterator(this->impl.end());
constexpr iterator end() {
return iterator(m_impl.end());
}
const_iterator end() const {
return const_iterator(this->impl.end());
constexpr const_iterator end() const {
return const_iterator(m_impl.end());
}
const_iterator cbegin() const {
constexpr const_iterator cbegin() const {
return this->begin();
}
const_iterator cend() const {
constexpr const_iterator cend() const {
return this->end();
}
iterator iterator_to(reference ref) {
return iterator(this->impl.iterator_to(*Traits::GetNode(std::addressof(ref))));
constexpr iterator iterator_to(reference ref) {
return iterator(m_impl.iterator_to(*Traits::GetNode(std::addressof(ref))));
}
const_iterator iterator_to(const_reference ref) const {
return const_iterator(this->impl.iterator_to(*Traits::GetNode(std::addressof(ref))));
constexpr const_iterator iterator_to(const_reference ref) const {
return const_iterator(m_impl.iterator_to(*Traits::GetNode(std::addressof(ref))));
}
// Content management.
bool empty() const {
return this->impl.empty();
constexpr bool empty() const {
return m_impl.empty();
}
reference back() {
return *Traits::GetParent(std::addressof(this->impl.back()));
constexpr reference back() {
return *Traits::GetParent(std::addressof(m_impl.back()));
}
const_reference back() const {
return *Traits::GetParent(std::addressof(this->impl.back()));
constexpr const_reference back() const {
return *Traits::GetParent(std::addressof(m_impl.back()));
}
reference front() {
return *Traits::GetParent(std::addressof(this->impl.front()));
constexpr reference front() {
return *Traits::GetParent(std::addressof(m_impl.front()));
}
const_reference front() const {
return *Traits::GetParent(std::addressof(this->impl.front()));
constexpr const_reference front() const {
return *Traits::GetParent(std::addressof(m_impl.front()));
}
iterator erase(iterator it) {
return iterator(this->impl.erase(it.GetImplIterator()));
constexpr iterator erase(iterator it) {
return iterator(m_impl.erase(it.GetImplIterator()));
}
iterator insert(reference ref) {
constexpr iterator insert(reference ref) {
ImplType::pointer node = Traits::GetNode(std::addressof(ref));
this->InsertImpl(node);
return iterator(node);
}
iterator find(const_reference ref) const {
constexpr iterator find(const_reference ref) const {
return iterator(this->FindImpl(Traits::GetNode(std::addressof(ref))));
}
iterator nfind(const_reference ref) const {
constexpr iterator nfind(const_reference ref) const {
return iterator(this->NFindImpl(Traits::GetNode(std::addressof(ref))));
}
iterator find_light(const_light_reference ref) const {
return iterator(this->FindLightImpl(std::addressof(ref)));
constexpr iterator find_key(const_key_reference ref) const {
return iterator(this->FindKeyImpl(ref));
}
iterator nfind_light(const_light_reference ref) const {
return iterator(this->NFindLightImpl(std::addressof(ref)));
constexpr iterator nfind_key(const_key_reference ref) const {
return iterator(this->NFindKeyImpl(ref));
}
constexpr iterator find_existing(const_reference ref) const {
return iterator(this->FindExistingImpl(Traits::GetNode(std::addressof(ref))));
}
constexpr iterator find_existing_key(const_key_reference ref) const {
return iterator(this->FindExistingKeyImpl(ref));
}
};
template <auto T, class Derived = impl::GetParentType<T>>
template <auto T, class Derived = Common::impl::GetParentType<T>>
class IntrusiveRedBlackTreeMemberTraits;
template <class Parent, IntrusiveRedBlackTreeNode Parent::*Member, class Derived>
@ -498,19 +526,16 @@ private:
return std::addressof(parent->*Member);
}
static constexpr Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
return GetParentPointer<Member, Derived>(node);
static Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
return Common::GetParentPointer<Member, Derived>(node);
}
static constexpr Derived const* GetParent(const IntrusiveRedBlackTreeNode* node) {
return GetParentPointer<Member, Derived>(node);
static Derived const* GetParent(IntrusiveRedBlackTreeNode const* node) {
return Common::GetParentPointer<Member, Derived>(node);
}
private:
static constexpr TypedStorage<Derived> DerivedStorage = {};
};
template <auto T, class Derived = impl::GetParentType<T>>
template <auto T, class Derived = Common::impl::GetParentType<T>>
class IntrusiveRedBlackTreeMemberTraitsDeferredAssert;
template <class Parent, IntrusiveRedBlackTreeNode Parent::*Member, class Derived>
@ -521,11 +546,6 @@ public:
IntrusiveRedBlackTree<Derived, IntrusiveRedBlackTreeMemberTraitsDeferredAssert, Comparator>;
using TreeTypeImpl = impl::IntrusiveRedBlackTreeImpl;
static constexpr bool IsValid() {
TypedStorage<Derived> DerivedStorage = {};
return GetParent(GetNode(GetPointer(DerivedStorage))) == GetPointer(DerivedStorage);
}
private:
template <class, class, class>
friend class IntrusiveRedBlackTree;
@ -540,30 +560,36 @@ private:
return std::addressof(parent->*Member);
}
static constexpr Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
return GetParentPointer<Member, Derived>(node);
static Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
return Common::GetParentPointer<Member, Derived>(node);
}
static constexpr Derived const* GetParent(const IntrusiveRedBlackTreeNode* node) {
return GetParentPointer<Member, Derived>(node);
static Derived const* GetParent(IntrusiveRedBlackTreeNode const* node) {
return Common::GetParentPointer<Member, Derived>(node);
}
};
template <class Derived>
class IntrusiveRedBlackTreeBaseNode : public IntrusiveRedBlackTreeNode {
class alignas(void*) IntrusiveRedBlackTreeBaseNode : public IntrusiveRedBlackTreeNode {
public:
using IntrusiveRedBlackTreeNode::IntrusiveRedBlackTreeNode;
constexpr Derived* GetPrev() {
return static_cast<Derived*>(impl::IntrusiveRedBlackTreeImpl::GetPrev(this));
return static_cast<Derived*>(static_cast<IntrusiveRedBlackTreeBaseNode*>(
impl::IntrusiveRedBlackTreeImpl::GetPrev(this)));
}
constexpr const Derived* GetPrev() const {
return static_cast<const Derived*>(impl::IntrusiveRedBlackTreeImpl::GetPrev(this));
return static_cast<const Derived*>(static_cast<const IntrusiveRedBlackTreeBaseNode*>(
impl::IntrusiveRedBlackTreeImpl::GetPrev(this)));
}
constexpr Derived* GetNext() {
return static_cast<Derived*>(impl::IntrusiveRedBlackTreeImpl::GetNext(this));
return static_cast<Derived*>(static_cast<IntrusiveRedBlackTreeBaseNode*>(
impl::IntrusiveRedBlackTreeImpl::GetNext(this)));
}
constexpr const Derived* GetNext() const {
return static_cast<const Derived*>(impl::IntrusiveRedBlackTreeImpl::GetNext(this));
return static_cast<const Derived*>(static_cast<const IntrusiveRedBlackTreeBaseNode*>(
impl::IntrusiveRedBlackTreeImpl::GetNext(this)));
}
};
@ -581,19 +607,22 @@ private:
friend class impl::IntrusiveRedBlackTreeImpl;
static constexpr IntrusiveRedBlackTreeNode* GetNode(Derived* parent) {
return static_cast<IntrusiveRedBlackTreeNode*>(parent);
return static_cast<IntrusiveRedBlackTreeNode*>(
static_cast<IntrusiveRedBlackTreeBaseNode<Derived>*>(parent));
}
static constexpr IntrusiveRedBlackTreeNode const* GetNode(Derived const* parent) {
return static_cast<const IntrusiveRedBlackTreeNode*>(parent);
return static_cast<const IntrusiveRedBlackTreeNode*>(
static_cast<const IntrusiveRedBlackTreeBaseNode<Derived>*>(parent));
}
static constexpr Derived* GetParent(IntrusiveRedBlackTreeNode* node) {
return static_cast<Derived*>(node);
return static_cast<Derived*>(static_cast<IntrusiveRedBlackTreeBaseNode<Derived>*>(node));
}
static constexpr Derived const* GetParent(const IntrusiveRedBlackTreeNode* node) {
return static_cast<const Derived*>(node);
static constexpr Derived const* GetParent(IntrusiveRedBlackTreeNode const* node) {
return static_cast<const Derived*>(
static_cast<const IntrusiveRedBlackTreeBaseNode<Derived>*>(node));
}
};