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:1193	If `Allocator::propagate_on_container_swap` is declared and `Allocator::propagate_on_container_swap::value` is `true` then the containers' allocators are swapped. Otherwise, swapping with unequal allocators results in undefined behavior.	如果 `Allocator::propagate_on_container_swap` 被声明且 `Allocator::propagate_on_container_swap::value` 为 `true`，则交换容器的分配器。否则，使用不相等的分配器进行交换将导致未定义行为。
	Throws:;; Nothing unless `key_equal` or `hasher` throw on swapping.	抛出：除非 `key_equal` 或 `hasher` 在交换时抛出异常，否则不抛出任何异常。
:1198	---	---
	Extract by Position	通过位置提取
	```c++ node_type extract(const_iterator position); ```	```c++ node_type extract(const_iterator position); ```
	Extracts the element pointed to by `position`.	提取 `position` 所指向的元素。
	Returns:;; A `node_type` object holding the extracted element. Throws:;; Nothing.	返回：一个持有被提取元素的 `node_type` 对象。抛出：不抛出任何异常。
:1211	---	---
	Extract by Key	通过键提取
	```c++ node_type extract(const key_type& k); template<class K> node_type extract(K&& k); ```	```c++ node_type extract(const key_type& k); template<class k=""> node_type extract(K&& k); ```</class>
	Extracts the element with key equivalent to `k`, if it exists.	提取键与 `k` 等价的元素（如果存在）。
	Returns:;; A `node_type` object holding the extracted element, or empty if no element was extracted. Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. Notes:;; The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.	返回：一个持有被提取元素的 `node_type` 对象；如果未提取到任何元素，则返回空。抛出：仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。注意：`template<class k="">` 重载仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时参与重载决议。库假定 `Hash` 可同时使用 `K` 和 `Key` 调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型对象的开销。</class>
:1226	---	---
	pull	pull
	```c++ init_type pull(const_iterator position); ```	```c++ init_type pull(const_iterator position); ```
	Move-constructs an `init_value` `x` from the element pointed to by `position`, erases the element and returns `x`.	从 `position` 指向的元素移动构造一个 `init_value` 对象 `x`，擦除该元素并返回 `x`。
:1236	---	---
	clear	清空
	```c++ void clear() noexcept; ```	```c++ void clear() noexcept; ```
	Erases all elements in the container.	擦除容器中的所有元素。
	Postconditions:;; `size() == 0`, `max_load() >= max_load_factor() * bucket_count()`	后置条件：`size() == 0`，`max_load() >= max_load_factor() * bucket_count()`
:1248	---	---
	merge	合并
	```c++ template<class H2, class P2> void merge(unordered_node_map<Key, T, H2, P2, Allocator>& source); template<class H2, class P2> void merge(unordered_node_map<Key, T, H2, P2, Allocator>&& source); ```	```c++ template<class h2,="" class="" p2=""> void merge(unordered_node_map<key, t,="" h2,="" p2,="" allocator="">& source); template<class h2,="" class="" p2=""> void merge(unordered_node_map<key, t,="" h2,="" p2,="" allocator="">&& source); ```</key,></class></key,></class>
	Transfers all the element nodes from `source` whose key is not already present in `*this`.	从 `source` 转移所有键在 `*this` 中尚未存在的元素节点。
	Requires:;; `this\->get_allocator() == source.get_allocator()`. Notes:;; Invalidates iterators to the elements transferred. If the resulting size of `this` is greater than its original maximum load, invalidates all iterators associated to `this`.	要求：`this->get_allocator() == source.get_allocator()`。注意：会使被转移元素的迭代器失效。如果 `this` 的结果大小大于其原始最大负载，则会使与 `this` 关联的所有迭代器失效。
:1266	---	---
	Observers	观察器
	get_allocator	get_allocator
	``` allocator_type get_allocator() const noexcept; ```	``` allocator_type get_allocator() const noexcept; ```
	Returns:;; The container's allocator.	返回：容器的分配器。

	English	Chinese (Simplified Han script)	Actions
	```c++ iterator insert(const_iterator hint, const value_type& obj); iterator insert(const_iterator hint, const init_type& obj); ``` Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	```c++ iterator insert(const_iterator hint, const value_type& obj); iterator insert(const_iterator hint, const init_type& obj); ``` 当且仅当容器中没有具有等价键的元素时，才将 `obj` 插入容器。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into the container from `*first`. Throws:;; When inserting a single element, if an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load.	要求：`value_type` 可以从 `*first` 出发在容器中进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^]。抛出：当插入单个元素时，如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：可能使迭代器失效，但仅当插入导致负载大于最大负载时才会发生。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^] into the container. Throws:;; When inserting a single element, if an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load.	要求：`value_type` 可以在容器中进行 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[可拷贝插入^]。抛出：当插入单个元素时，如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：可能使迭代器失效，但仅当插入导致负载大于最大负载时才会发生。
	```c++ iterator insert(const_iterator hint, node_type&& nh); ```	```c++ iterator insert(const_iterator hint, node_type&& nh); ```
	Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; This function is similiar to xref:#unordered_node_map_emplace[emplace], with the difference that no `value_type` is constructed if there is an element with an equivalent key; otherwise, the construction is of the form: + + -- ```c++	返回：返回类型的 `bool` 分量为 `true` 表示发生了插入。如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：此函数类似于 xref:#unordered_node_map_emplace[emplace]，区别在于如果存在具有等价键的元素，则不构造 `value_type`；否则，构造形式为： ```c++
	```c++ template<class... Args> iterator try_emplace(const_iterator hint, const key_type& k, Args&&... args); template<class... Args> iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args); template<class K, class... Args> iterator try_emplace(const_iterator hint, K&& k, Args&&... args); ```	```c++ template<class... args=""> iterator try_emplace(const_iterator hint, const key_type& k, Args&&... args); template<class... args=""> iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args); template<class k,="" class...="" args=""> iterator try_emplace(const_iterator hint, K&& k, Args&&... args); ```</class></class...></class...>
	`hint` is a suggestion to where the element should be inserted. This implementation ignores it.	`hint` 是关于元素插入位置的建议。此实现会忽略该建议。
	Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load. + + The `template<class K, class M>` only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.	返回：返回类型的 `bool` 分量为 `true` 表示发生了插入。如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：可能使迭代器失效，但仅当插入导致负载大于最大负载时才会发生。 `template<class k,="" class="" m="">` 仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时参与重载决议。库假定 `Hash` 可同时使用 `K` 和 `Key` 调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型对象的开销。</class>
	```c++ template<class M> iterator insert_or_assign(const_iterator hint, const key_type& k, M&& obj); template<class M> iterator insert_or_assign(const_iterator hint, key_type&& k, M&& obj); template<class K, class M> iterator insert_or_assign(const_iterator hint, K&& k, M&& obj); ```	```c++ template<class m=""> iterator insert_or_assign(const_iterator hint, const key_type& k, M&& obj); template<class m=""> iterator insert_or_assign(const_iterator hint, key_type&& k, M&& obj); template<class k,="" class="" m=""> iterator insert_or_assign(const_iterator hint, K&& k, M&& obj); ```</class></class></class>
	Returns:;; If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load. + + The `template<class K, class M>` only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.	返回：如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：可能使迭代器失效，但仅当插入导致负载大于最大负载时才会发生。 `template<class k,="" class="" m="">` 仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时参与重载决议。库假定 `Hash` 可同时使用 `K` 和 `Key` 调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型对象的开销。</class>
	Erase all elements with key equivalent to `k`.	擦除所有键与 `k` 等价的元素。
	Returns:;; The number of elements erased. Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. Notes:;; The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs and neither `iterator` nor `const_iterator` are implicitly convertible from `K`. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.	返回：被擦除的元素数量。抛出：仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。注意：`template<class k="">` 重载仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef，且 `iterator` 和 `const_iterator` 都不能从 `K` 隐式转换时参与重载决议。库假定 `Hash` 可同时使用 `K` 和 `Key` 调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型对象的开销。</class>
	swap	交换
	```c++ void swap(unordered_node_map& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value \|\| boost::allocator_traits<Allocator>::propagate_on_container_swap::value); ```	```c++ void swap(unordered_node_map& other) noexcept(boost::allocator_traits<allocator>::is_always_equal::value \|\| boost::allocator_traits<allocator>::propagate_on_container_swap::value); ```</allocator></allocator>
	Extract by Position	通过位置提取
	Move-constructs an `init_value` `x` from the element pointed to by `position`, erases the element and returns `x`.	从 `position` 指向的元素移动构造一个 `init_value` 对象 `x`，擦除该元素并返回 `x`。
	clear	清空
	Transfers all the element nodes from `source` whose key is not already present in `*this`.	从 `source` 转移所有键在 `*this` 中尚未存在的元素节点。
	Requires:;; `this\->get_allocator() == source.get_allocator()`. Notes:;; Invalidates iterators to the elements transferred. If the resulting size of `this` is greater than its original maximum load, invalidates all iterators associated to `this`.	要求：`this->get_allocator() == source.get_allocator()`。注意：会使被转移元素的迭代器失效。如果 `this` 的结果大小大于其原始最大负载，则会使与 `this` 关联的所有迭代器失效。
	Returns:;; The container's key equality predicate	返回：容器的键相等谓词。
	Lookup	查找
	Loading an unordered_node_map from an archive	从归档中加载 unordered_node_map
	`boost::unordered_node_map` — A node-based, open-addressing unordered associative container that associates unique keys with another value.	`boost::unordered_node_map` — 一个基于节点的、开放寻址的无序关联容器，将唯一键与对应值相关联。
	`boost::unordered_node_map` uses an open-addressing layout like `boost::unordered_flat_map`, but, being node-based, it provides pointer stability and node handling functionalities. Its performance lies between those of `boost::unordered_map` and `boost::unordered_flat_map`.	`boost::unordered_node_map` 使用与 `boost::unordered_flat_map` 类似的开放寻址布局，但由于其基于节点的特性，它提供了指针稳定性和节点处理功能。其性能介于 `boost::unordered_map` 和 `boost::unordered_flat_map` 之间。
	Other than this, `boost::unordered_node_map` is mostly a drop-in replacement of standard unordered associative containers.	除此之外，`boost::unordered_node_map` 基本上可以作为标准无序关联容器的即时代替品。
	Description	描述
	Template Parameters	模板参数
	_Key_	_键_
	into the container from any `std::pair` object convertible to it, and it also must be https://en.cppreference.com/w/cpp/named_req/Erasable[Erasable^] from the container.	从任何可转换为 `std::pair` 的对象构造并插入容器，并且还必须可以从容器中 https://en.cppreference.com/w/cpp/named_req/Erasable[可擦除^]。
	_T_	_T_

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