about summary refs log tree commit diff
path: root/third_party/abseil_cpp/absl/container/internal/btree_container.h
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/abseil_cpp/absl/container/internal/btree_container.h')
-rw-r--r--third_party/abseil_cpp/absl/container/internal/btree_container.h683
1 files changed, 0 insertions, 683 deletions
diff --git a/third_party/abseil_cpp/absl/container/internal/btree_container.h b/third_party/abseil_cpp/absl/container/internal/btree_container.h
deleted file mode 100644
index 887eda4122f8..000000000000
--- a/third_party/abseil_cpp/absl/container/internal/btree_container.h
+++ /dev/null
@@ -1,683 +0,0 @@
-// Copyright 2018 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef ABSL_CONTAINER_INTERNAL_BTREE_CONTAINER_H_
-#define ABSL_CONTAINER_INTERNAL_BTREE_CONTAINER_H_
-
-#include <algorithm>
-#include <initializer_list>
-#include <iterator>
-#include <utility>
-
-#include "absl/base/internal/throw_delegate.h"
-#include "absl/container/internal/btree.h"  // IWYU pragma: export
-#include "absl/container/internal/common.h"
-#include "absl/memory/memory.h"
-#include "absl/meta/type_traits.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace container_internal {
-
-// A common base class for btree_set, btree_map, btree_multiset, and
-// btree_multimap.
-template <typename Tree>
-class btree_container {
-  using params_type = typename Tree::params_type;
-
- protected:
-  // Alias used for heterogeneous lookup functions.
-  // `key_arg<K>` evaluates to `K` when the functors are transparent and to
-  // `key_type` otherwise. It permits template argument deduction on `K` for the
-  // transparent case.
-  template <class K>
-  using key_arg =
-      typename KeyArg<IsTransparent<typename Tree::key_compare>::value>::
-          template type<K, typename Tree::key_type>;
-
- public:
-  using key_type = typename Tree::key_type;
-  using value_type = typename Tree::value_type;
-  using size_type = typename Tree::size_type;
-  using difference_type = typename Tree::difference_type;
-  using key_compare = typename Tree::key_compare;
-  using value_compare = typename Tree::value_compare;
-  using allocator_type = typename Tree::allocator_type;
-  using reference = typename Tree::reference;
-  using const_reference = typename Tree::const_reference;
-  using pointer = typename Tree::pointer;
-  using const_pointer = typename Tree::const_pointer;
-  using iterator = typename Tree::iterator;
-  using const_iterator = typename Tree::const_iterator;
-  using reverse_iterator = typename Tree::reverse_iterator;
-  using const_reverse_iterator = typename Tree::const_reverse_iterator;
-  using node_type = typename Tree::node_handle_type;
-
-  // Constructors/assignments.
-  btree_container() : tree_(key_compare(), allocator_type()) {}
-  explicit btree_container(const key_compare &comp,
-                           const allocator_type &alloc = allocator_type())
-      : tree_(comp, alloc) {}
-  explicit btree_container(const allocator_type &alloc)
-      : tree_(key_compare(), alloc) {}
-
-  btree_container(const btree_container &other)
-      : btree_container(other, absl::allocator_traits<allocator_type>::
-                                   select_on_container_copy_construction(
-                                       other.get_allocator())) {}
-  btree_container(const btree_container &other, const allocator_type &alloc)
-      : tree_(other.tree_, alloc) {}
-
-  btree_container(btree_container &&other) noexcept(
-      std::is_nothrow_move_constructible<Tree>::value) = default;
-  btree_container(btree_container &&other, const allocator_type &alloc)
-      : tree_(std::move(other.tree_), alloc) {}
-
-  btree_container &operator=(const btree_container &other) = default;
-  btree_container &operator=(btree_container &&other) noexcept(
-      std::is_nothrow_move_assignable<Tree>::value) = default;
-
-  // Iterator routines.
-  iterator begin() { return tree_.begin(); }
-  const_iterator begin() const { return tree_.begin(); }
-  const_iterator cbegin() const { return tree_.begin(); }
-  iterator end() { return tree_.end(); }
-  const_iterator end() const { return tree_.end(); }
-  const_iterator cend() const { return tree_.end(); }
-  reverse_iterator rbegin() { return tree_.rbegin(); }
-  const_reverse_iterator rbegin() const { return tree_.rbegin(); }
-  const_reverse_iterator crbegin() const { return tree_.rbegin(); }
-  reverse_iterator rend() { return tree_.rend(); }
-  const_reverse_iterator rend() const { return tree_.rend(); }
-  const_reverse_iterator crend() const { return tree_.rend(); }
-
-  // Lookup routines.
-  template <typename K = key_type>
-  size_type count(const key_arg<K> &key) const {
-    auto equal_range = this->equal_range(key);
-    return std::distance(equal_range.first, equal_range.second);
-  }
-  template <typename K = key_type>
-  iterator find(const key_arg<K> &key) {
-    return tree_.find(key);
-  }
-  template <typename K = key_type>
-  const_iterator find(const key_arg<K> &key) const {
-    return tree_.find(key);
-  }
-  template <typename K = key_type>
-  bool contains(const key_arg<K> &key) const {
-    return find(key) != end();
-  }
-  template <typename K = key_type>
-  iterator lower_bound(const key_arg<K> &key) {
-    return tree_.lower_bound(key);
-  }
-  template <typename K = key_type>
-  const_iterator lower_bound(const key_arg<K> &key) const {
-    return tree_.lower_bound(key);
-  }
-  template <typename K = key_type>
-  iterator upper_bound(const key_arg<K> &key) {
-    return tree_.upper_bound(key);
-  }
-  template <typename K = key_type>
-  const_iterator upper_bound(const key_arg<K> &key) const {
-    return tree_.upper_bound(key);
-  }
-  template <typename K = key_type>
-  std::pair<iterator, iterator> equal_range(const key_arg<K> &key) {
-    return tree_.equal_range(key);
-  }
-  template <typename K = key_type>
-  std::pair<const_iterator, const_iterator> equal_range(
-      const key_arg<K> &key) const {
-    return tree_.equal_range(key);
-  }
-
-  // Deletion routines. Note that there is also a deletion routine that is
-  // specific to btree_set_container/btree_multiset_container.
-
-  // Erase the specified iterator from the btree. The iterator must be valid
-  // (i.e. not equal to end()).  Return an iterator pointing to the node after
-  // the one that was erased (or end() if none exists).
-  iterator erase(const_iterator iter) { return tree_.erase(iterator(iter)); }
-  iterator erase(iterator iter) { return tree_.erase(iter); }
-  iterator erase(const_iterator first, const_iterator last) {
-    return tree_.erase_range(iterator(first), iterator(last)).second;
-  }
-  template <typename K = key_type>
-  size_type erase(const key_arg<K> &key) {
-    auto equal_range = this->equal_range(key);
-    return tree_.erase_range(equal_range.first, equal_range.second).first;
-  }
-
-  // Extract routines.
-  node_type extract(iterator position) {
-    // Use Move instead of Transfer, because the rebalancing code expects to
-    // have a valid object to scribble metadata bits on top of.
-    auto node = CommonAccess::Move<node_type>(get_allocator(), position.slot());
-    erase(position);
-    return node;
-  }
-  node_type extract(const_iterator position) {
-    return extract(iterator(position));
-  }
-
-  // Utility routines.
-  void clear() { tree_.clear(); }
-  void swap(btree_container &other) { tree_.swap(other.tree_); }
-  void verify() const { tree_.verify(); }
-
-  // Size routines.
-  size_type size() const { return tree_.size(); }
-  size_type max_size() const { return tree_.max_size(); }
-  bool empty() const { return tree_.empty(); }
-
-  friend bool operator==(const btree_container &x, const btree_container &y) {
-    if (x.size() != y.size()) return false;
-    return std::equal(x.begin(), x.end(), y.begin());
-  }
-
-  friend bool operator!=(const btree_container &x, const btree_container &y) {
-    return !(x == y);
-  }
-
-  friend bool operator<(const btree_container &x, const btree_container &y) {
-    return std::lexicographical_compare(x.begin(), x.end(), y.begin(), y.end());
-  }
-
-  friend bool operator>(const btree_container &x, const btree_container &y) {
-    return y < x;
-  }
-
-  friend bool operator<=(const btree_container &x, const btree_container &y) {
-    return !(y < x);
-  }
-
-  friend bool operator>=(const btree_container &x, const btree_container &y) {
-    return !(x < y);
-  }
-
-  // The allocator used by the btree.
-  allocator_type get_allocator() const { return tree_.get_allocator(); }
-
-  // The key comparator used by the btree.
-  key_compare key_comp() const { return tree_.key_comp(); }
-  value_compare value_comp() const { return tree_.value_comp(); }
-
-  // Support absl::Hash.
-  template <typename State>
-  friend State AbslHashValue(State h, const btree_container &b) {
-    for (const auto &v : b) {
-      h = State::combine(std::move(h), v);
-    }
-    return State::combine(std::move(h), b.size());
-  }
-
- protected:
-  Tree tree_;
-};
-
-// A common base class for btree_set and btree_map.
-template <typename Tree>
-class btree_set_container : public btree_container<Tree> {
-  using super_type = btree_container<Tree>;
-  using params_type = typename Tree::params_type;
-  using init_type = typename params_type::init_type;
-  using is_key_compare_to = typename params_type::is_key_compare_to;
-  friend class BtreeNodePeer;
-
- protected:
-  template <class K>
-  using key_arg = typename super_type::template key_arg<K>;
-
- public:
-  using key_type = typename Tree::key_type;
-  using value_type = typename Tree::value_type;
-  using size_type = typename Tree::size_type;
-  using key_compare = typename Tree::key_compare;
-  using allocator_type = typename Tree::allocator_type;
-  using iterator = typename Tree::iterator;
-  using const_iterator = typename Tree::const_iterator;
-  using node_type = typename super_type::node_type;
-  using insert_return_type = InsertReturnType<iterator, node_type>;
-
-  // Inherit constructors.
-  using super_type::super_type;
-  btree_set_container() {}
-
-  // Range constructors.
-  template <class InputIterator>
-  btree_set_container(InputIterator b, InputIterator e,
-                      const key_compare &comp = key_compare(),
-                      const allocator_type &alloc = allocator_type())
-      : super_type(comp, alloc) {
-    insert(b, e);
-  }
-  template <class InputIterator>
-  btree_set_container(InputIterator b, InputIterator e,
-                      const allocator_type &alloc)
-      : btree_set_container(b, e, key_compare(), alloc) {}
-
-  // Initializer list constructors.
-  btree_set_container(std::initializer_list<init_type> init,
-                      const key_compare &comp = key_compare(),
-                      const allocator_type &alloc = allocator_type())
-      : btree_set_container(init.begin(), init.end(), comp, alloc) {}
-  btree_set_container(std::initializer_list<init_type> init,
-                      const allocator_type &alloc)
-      : btree_set_container(init.begin(), init.end(), alloc) {}
-
-  // Insertion routines.
-  std::pair<iterator, bool> insert(const value_type &v) {
-    return this->tree_.insert_unique(params_type::key(v), v);
-  }
-  std::pair<iterator, bool> insert(value_type &&v) {
-    return this->tree_.insert_unique(params_type::key(v), std::move(v));
-  }
-  template <typename... Args>
-  std::pair<iterator, bool> emplace(Args &&... args) {
-    init_type v(std::forward<Args>(args)...);
-    return this->tree_.insert_unique(params_type::key(v), std::move(v));
-  }
-  iterator insert(const_iterator hint, const value_type &v) {
-    return this->tree_
-        .insert_hint_unique(iterator(hint), params_type::key(v), v)
-        .first;
-  }
-  iterator insert(const_iterator hint, value_type &&v) {
-    return this->tree_
-        .insert_hint_unique(iterator(hint), params_type::key(v), std::move(v))
-        .first;
-  }
-  template <typename... Args>
-  iterator emplace_hint(const_iterator hint, Args &&... args) {
-    init_type v(std::forward<Args>(args)...);
-    return this->tree_
-        .insert_hint_unique(iterator(hint), params_type::key(v), std::move(v))
-        .first;
-  }
-  template <typename InputIterator>
-  void insert(InputIterator b, InputIterator e) {
-    this->tree_.insert_iterator_unique(b, e, 0);
-  }
-  void insert(std::initializer_list<init_type> init) {
-    this->tree_.insert_iterator_unique(init.begin(), init.end(), 0);
-  }
-  insert_return_type insert(node_type &&node) {
-    if (!node) return {this->end(), false, node_type()};
-    std::pair<iterator, bool> res =
-        this->tree_.insert_unique(params_type::key(CommonAccess::GetSlot(node)),
-                                  CommonAccess::GetSlot(node));
-    if (res.second) {
-      CommonAccess::Destroy(&node);
-      return {res.first, true, node_type()};
-    } else {
-      return {res.first, false, std::move(node)};
-    }
-  }
-  iterator insert(const_iterator hint, node_type &&node) {
-    if (!node) return this->end();
-    std::pair<iterator, bool> res = this->tree_.insert_hint_unique(
-        iterator(hint), params_type::key(CommonAccess::GetSlot(node)),
-        CommonAccess::GetSlot(node));
-    if (res.second) CommonAccess::Destroy(&node);
-    return res.first;
-  }
-
-  // Node extraction routines.
-  // TODO(ezb): when the comparator is heterogeneous and has different
-  // equivalence classes for different lookup types, we should extract the first
-  // equivalent value if there are multiple.
-  template <typename K = key_type>
-  node_type extract(const key_arg<K> &key) {
-    auto it = this->find(key);
-    return it == this->end() ? node_type() : extract(it);
-  }
-  using super_type::extract;
-
-  // Merge routines.
-  // Moves elements from `src` into `this`. If the element already exists in
-  // `this`, it is left unmodified in `src`.
-  template <
-      typename T,
-      typename absl::enable_if_t<
-          absl::conjunction<
-              std::is_same<value_type, typename T::value_type>,
-              std::is_same<allocator_type, typename T::allocator_type>,
-              std::is_same<typename params_type::is_map_container,
-                           typename T::params_type::is_map_container>>::value,
-          int> = 0>
-  void merge(btree_container<T> &src) {  // NOLINT
-    for (auto src_it = src.begin(); src_it != src.end();) {
-      if (insert(std::move(params_type::element(src_it.slot()))).second) {
-        src_it = src.erase(src_it);
-      } else {
-        ++src_it;
-      }
-    }
-  }
-
-  template <
-      typename T,
-      typename absl::enable_if_t<
-          absl::conjunction<
-              std::is_same<value_type, typename T::value_type>,
-              std::is_same<allocator_type, typename T::allocator_type>,
-              std::is_same<typename params_type::is_map_container,
-                           typename T::params_type::is_map_container>>::value,
-          int> = 0>
-  void merge(btree_container<T> &&src) {
-    merge(src);
-  }
-};
-
-// Base class for btree_map.
-template <typename Tree>
-class btree_map_container : public btree_set_container<Tree> {
-  using super_type = btree_set_container<Tree>;
-  using params_type = typename Tree::params_type;
-  friend class BtreeNodePeer;
-
- private:
-  template <class K>
-  using key_arg = typename super_type::template key_arg<K>;
-
- public:
-  using key_type = typename Tree::key_type;
-  using mapped_type = typename params_type::mapped_type;
-  using value_type = typename Tree::value_type;
-  using key_compare = typename Tree::key_compare;
-  using allocator_type = typename Tree::allocator_type;
-  using iterator = typename Tree::iterator;
-  using const_iterator = typename Tree::const_iterator;
-
-  // Inherit constructors.
-  using super_type::super_type;
-  btree_map_container() {}
-
-  // Insertion routines.
-  // Note: the nullptr template arguments and extra `const M&` overloads allow
-  // for supporting bitfield arguments.
-  template <typename K = key_type, class M>
-  std::pair<iterator, bool> insert_or_assign(const key_arg<K> &k,
-                                             const M &obj) {
-    return insert_or_assign_impl(k, obj);
-  }
-  template <typename K = key_type, class M, K * = nullptr>
-  std::pair<iterator, bool> insert_or_assign(key_arg<K> &&k, const M &obj) {
-    return insert_or_assign_impl(std::forward<K>(k), obj);
-  }
-  template <typename K = key_type, class M, M * = nullptr>
-  std::pair<iterator, bool> insert_or_assign(const key_arg<K> &k, M &&obj) {
-    return insert_or_assign_impl(k, std::forward<M>(obj));
-  }
-  template <typename K = key_type, class M, K * = nullptr, M * = nullptr>
-  std::pair<iterator, bool> insert_or_assign(key_arg<K> &&k, M &&obj) {
-    return insert_or_assign_impl(std::forward<K>(k), std::forward<M>(obj));
-  }
-  template <typename K = key_type, class M>
-  iterator insert_or_assign(const_iterator hint, const key_arg<K> &k,
-                            const M &obj) {
-    return insert_or_assign_hint_impl(hint, k, obj);
-  }
-  template <typename K = key_type, class M, K * = nullptr>
-  iterator insert_or_assign(const_iterator hint, key_arg<K> &&k, const M &obj) {
-    return insert_or_assign_hint_impl(hint, std::forward<K>(k), obj);
-  }
-  template <typename K = key_type, class M, M * = nullptr>
-  iterator insert_or_assign(const_iterator hint, const key_arg<K> &k, M &&obj) {
-    return insert_or_assign_hint_impl(hint, k, std::forward<M>(obj));
-  }
-  template <typename K = key_type, class M, K * = nullptr, M * = nullptr>
-  iterator insert_or_assign(const_iterator hint, key_arg<K> &&k, M &&obj) {
-    return insert_or_assign_hint_impl(hint, std::forward<K>(k),
-                                      std::forward<M>(obj));
-  }
-
-  template <typename K = key_type, typename... Args,
-            typename absl::enable_if_t<
-                !std::is_convertible<K, const_iterator>::value, int> = 0>
-  std::pair<iterator, bool> try_emplace(const key_arg<K> &k, Args &&... args) {
-    return try_emplace_impl(k, std::forward<Args>(args)...);
-  }
-  template <typename K = key_type, typename... Args,
-            typename absl::enable_if_t<
-                !std::is_convertible<K, const_iterator>::value, int> = 0>
-  std::pair<iterator, bool> try_emplace(key_arg<K> &&k, Args &&... args) {
-    return try_emplace_impl(std::forward<K>(k), std::forward<Args>(args)...);
-  }
-  template <typename K = key_type, typename... Args>
-  iterator try_emplace(const_iterator hint, const key_arg<K> &k,
-                       Args &&... args) {
-    return try_emplace_hint_impl(hint, k, std::forward<Args>(args)...);
-  }
-  template <typename K = key_type, typename... Args>
-  iterator try_emplace(const_iterator hint, key_arg<K> &&k, Args &&... args) {
-    return try_emplace_hint_impl(hint, std::forward<K>(k),
-                                 std::forward<Args>(args)...);
-  }
-
-  template <typename K = key_type>
-  mapped_type &operator[](const key_arg<K> &k) {
-    return try_emplace(k).first->second;
-  }
-  template <typename K = key_type>
-  mapped_type &operator[](key_arg<K> &&k) {
-    return try_emplace(std::forward<K>(k)).first->second;
-  }
-
-  template <typename K = key_type>
-  mapped_type &at(const key_arg<K> &key) {
-    auto it = this->find(key);
-    if (it == this->end())
-      base_internal::ThrowStdOutOfRange("absl::btree_map::at");
-    return it->second;
-  }
-  template <typename K = key_type>
-  const mapped_type &at(const key_arg<K> &key) const {
-    auto it = this->find(key);
-    if (it == this->end())
-      base_internal::ThrowStdOutOfRange("absl::btree_map::at");
-    return it->second;
-  }
-
- private:
-  // Note: when we call `std::forward<M>(obj)` twice, it's safe because
-  // insert_unique/insert_hint_unique are guaranteed to not consume `obj` when
-  // `ret.second` is false.
-  template <class K, class M>
-  std::pair<iterator, bool> insert_or_assign_impl(K &&k, M &&obj) {
-    const std::pair<iterator, bool> ret =
-        this->tree_.insert_unique(k, std::forward<K>(k), std::forward<M>(obj));
-    if (!ret.second) ret.first->second = std::forward<M>(obj);
-    return ret;
-  }
-  template <class K, class M>
-  iterator insert_or_assign_hint_impl(const_iterator hint, K &&k, M &&obj) {
-    const std::pair<iterator, bool> ret = this->tree_.insert_hint_unique(
-        iterator(hint), k, std::forward<K>(k), std::forward<M>(obj));
-    if (!ret.second) ret.first->second = std::forward<M>(obj);
-    return ret.first;
-  }
-
-  template <class K, class... Args>
-  std::pair<iterator, bool> try_emplace_impl(K &&k, Args &&... args) {
-    return this->tree_.insert_unique(
-        k, std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)),
-        std::forward_as_tuple(std::forward<Args>(args)...));
-  }
-  template <class K, class... Args>
-  iterator try_emplace_hint_impl(const_iterator hint, K &&k, Args &&... args) {
-    return this->tree_
-        .insert_hint_unique(iterator(hint), k, std::piecewise_construct,
-                            std::forward_as_tuple(std::forward<K>(k)),
-                            std::forward_as_tuple(std::forward<Args>(args)...))
-        .first;
-  }
-};
-
-// A common base class for btree_multiset and btree_multimap.
-template <typename Tree>
-class btree_multiset_container : public btree_container<Tree> {
-  using super_type = btree_container<Tree>;
-  using params_type = typename Tree::params_type;
-  using init_type = typename params_type::init_type;
-  using is_key_compare_to = typename params_type::is_key_compare_to;
-
-  template <class K>
-  using key_arg = typename super_type::template key_arg<K>;
-
- public:
-  using key_type = typename Tree::key_type;
-  using value_type = typename Tree::value_type;
-  using size_type = typename Tree::size_type;
-  using key_compare = typename Tree::key_compare;
-  using allocator_type = typename Tree::allocator_type;
-  using iterator = typename Tree::iterator;
-  using const_iterator = typename Tree::const_iterator;
-  using node_type = typename super_type::node_type;
-
-  // Inherit constructors.
-  using super_type::super_type;
-  btree_multiset_container() {}
-
-  // Range constructors.
-  template <class InputIterator>
-  btree_multiset_container(InputIterator b, InputIterator e,
-                           const key_compare &comp = key_compare(),
-                           const allocator_type &alloc = allocator_type())
-      : super_type(comp, alloc) {
-    insert(b, e);
-  }
-  template <class InputIterator>
-  btree_multiset_container(InputIterator b, InputIterator e,
-                           const allocator_type &alloc)
-      : btree_multiset_container(b, e, key_compare(), alloc) {}
-
-  // Initializer list constructors.
-  btree_multiset_container(std::initializer_list<init_type> init,
-                           const key_compare &comp = key_compare(),
-                           const allocator_type &alloc = allocator_type())
-      : btree_multiset_container(init.begin(), init.end(), comp, alloc) {}
-  btree_multiset_container(std::initializer_list<init_type> init,
-                           const allocator_type &alloc)
-      : btree_multiset_container(init.begin(), init.end(), alloc) {}
-
-  // Insertion routines.
-  iterator insert(const value_type &v) { return this->tree_.insert_multi(v); }
-  iterator insert(value_type &&v) {
-    return this->tree_.insert_multi(std::move(v));
-  }
-  iterator insert(const_iterator hint, const value_type &v) {
-    return this->tree_.insert_hint_multi(iterator(hint), v);
-  }
-  iterator insert(const_iterator hint, value_type &&v) {
-    return this->tree_.insert_hint_multi(iterator(hint), std::move(v));
-  }
-  template <typename InputIterator>
-  void insert(InputIterator b, InputIterator e) {
-    this->tree_.insert_iterator_multi(b, e);
-  }
-  void insert(std::initializer_list<init_type> init) {
-    this->tree_.insert_iterator_multi(init.begin(), init.end());
-  }
-  template <typename... Args>
-  iterator emplace(Args &&... args) {
-    return this->tree_.insert_multi(init_type(std::forward<Args>(args)...));
-  }
-  template <typename... Args>
-  iterator emplace_hint(const_iterator hint, Args &&... args) {
-    return this->tree_.insert_hint_multi(
-        iterator(hint), init_type(std::forward<Args>(args)...));
-  }
-  iterator insert(node_type &&node) {
-    if (!node) return this->end();
-    iterator res =
-        this->tree_.insert_multi(params_type::key(CommonAccess::GetSlot(node)),
-                                 CommonAccess::GetSlot(node));
-    CommonAccess::Destroy(&node);
-    return res;
-  }
-  iterator insert(const_iterator hint, node_type &&node) {
-    if (!node) return this->end();
-    iterator res = this->tree_.insert_hint_multi(
-        iterator(hint),
-        std::move(params_type::element(CommonAccess::GetSlot(node))));
-    CommonAccess::Destroy(&node);
-    return res;
-  }
-
-  // Node extraction routines.
-  // TODO(ezb): we are supposed to extract the first equivalent key if there are
-  // multiple, but this isn't guaranteed to extract the first one.
-  template <typename K = key_type>
-  node_type extract(const key_arg<K> &key) {
-    auto it = this->find(key);
-    return it == this->end() ? node_type() : extract(it);
-  }
-  using super_type::extract;
-
-  // Merge routines.
-  // Moves all elements from `src` into `this`.
-  template <
-      typename T,
-      typename absl::enable_if_t<
-          absl::conjunction<
-              std::is_same<value_type, typename T::value_type>,
-              std::is_same<allocator_type, typename T::allocator_type>,
-              std::is_same<typename params_type::is_map_container,
-                           typename T::params_type::is_map_container>>::value,
-          int> = 0>
-  void merge(btree_container<T> &src) {  // NOLINT
-    for (auto src_it = src.begin(), end = src.end(); src_it != end; ++src_it) {
-      insert(std::move(params_type::element(src_it.slot())));
-    }
-    src.clear();
-  }
-
-  template <
-      typename T,
-      typename absl::enable_if_t<
-          absl::conjunction<
-              std::is_same<value_type, typename T::value_type>,
-              std::is_same<allocator_type, typename T::allocator_type>,
-              std::is_same<typename params_type::is_map_container,
-                           typename T::params_type::is_map_container>>::value,
-          int> = 0>
-  void merge(btree_container<T> &&src) {
-    merge(src);
-  }
-};
-
-// A base class for btree_multimap.
-template <typename Tree>
-class btree_multimap_container : public btree_multiset_container<Tree> {
-  using super_type = btree_multiset_container<Tree>;
-  using params_type = typename Tree::params_type;
-
- public:
-  using mapped_type = typename params_type::mapped_type;
-
-  // Inherit constructors.
-  using super_type::super_type;
-  btree_multimap_container() {}
-};
-
-}  // namespace container_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_CONTAINER_INTERNAL_BTREE_CONTAINER_H_