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