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	unlike xref:#unordered_flat_map_emplace_hint[emplace_hint], which simply forwards all arguments to ``value_type``'s constructor.	而非像 xref:#unordered_flat_map_emplace_hint[emplace_hint] 只是简单地将所有参数转发给 value_type 的构造函数。
:982	Can invalidate iterators pointers and references, but only if the insert causes the load to be greater than the maximum load.	可能会导致迭代器、指针和引用失效，但仅当插入操作导致负载因子超过最大负载因子时才会发生。
:984	The `template<class K, class\... Args>` 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.	`template<class k,="" args="">` 重载仅在以下条件下参与重载决议：`Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef，且 `iterator` 和 `const_iterator` 均不能从 `K` 隐式转换。库假定 `Hash` 可同时以 `K` 和 `Key` 调用，且 `Pred` 是透明的。这提供了异构查找能力，从而避免构造 `Key` 类型实例的开销。</class>
:986	--	--
:988	---	---
	insert_or_assign	insert++_++or++_++assign
	```c++ template<class M> std::pair<iterator, bool> insert_or_assign(const key_type& k, M&& obj); template<class M> std::pair<iterator, bool> insert_or_assign(key_type&& k, M&& obj); template<class K, class M> std::pair<iterator, bool> insert_or_assign(K&& k, M&& obj); ```	```c++ template<class m=""> std::pair<iterator, bool=""> insert_or_assign(const key_type& k, M&& obj); template<class m=""> std::pair<iterator, bool=""> insert_or_assign(key_type&& k, M&& obj); template<class k,="" class="" m=""> std::pair<iterator, bool=""> insert_or_assign(K&& k, M&& obj); ```</iterator,></class></iterator,></class></iterator,></class>
:1000	Inserts a new element into the container or updates an existing one by assigning to the contained value.	向容器中插入一个新元素，或通过赋值给已包含的值来更新现有元素。
:1002	If there is an element with key `k`, then it is updated by assigning `std::forward<M>(obj)`.	如果存在键为 k 的元素，则通过赋值 std::forward<m>(obj) 来更新该元素</m>
:1004	If there is no such element, it is added to the container as: ```c++	如果不存在这样的元素，则将其添加到容器中，形式如下：```c++
:1007	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<Key>(k)), std::forward_as_tuple(std::forward<M>(obj)))	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<key>(k)), std::forward_as_tuple(std::forward<m>(obj)))</m></key>
:1012	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<M>(obj))) ```	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<k>(k)), std::forward_as_tuple(std::forward<m>(obj))) ```</m></k>
	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 pointers and references, 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：若执行了插入，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能会导致迭代器、指针和引用失效，但仅当插入操作导致负载因子超过最大负载因子时才会发生。+ +`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` 可同时以 `K` 和 `Key` 调用，且 `Pred` 是透明的。这提供了异构查找能力，从而避免构造 `Key` 类型实例的开销。</class>
:1026	---	---
	insert_or_assign with Hint	带提示的 insert++_++or++_++assign
	```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>
:1038	Inserts a new element into the container or updates an existing one by assigning to the contained value.	向容器中插入一个新元素，或通过赋值给已存在的值来更新现有元素。
:1040	If there is an element with key `k`, then it is updated by assigning `std::forward<M>(obj)`.	如果存在键为 `k` 的元素，则通过赋值 `std::forward<m>(obj)` 来更新该元素。</m>
:1042	If there is no such element, it is added to the container as: ```c++	如果不存在这样的元素，则将其添加到容器中，形式如下：```c++
:1045	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<Key>(k)), std::forward_as_tuple(std::forward<M>(obj)))	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<key>(k)), std::forward_as_tuple(std::forward<m>(obj)))</m></key>
:1050	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<M>(obj))) ```	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<k>(k)), std::forward_as_tuple(std::forward<m>(obj))) ```</m></k>
:1055	`hint` is a suggestion to where the element should be inserted. This implementation ignores it.	`hint` 是一个关于元素应插入位置的建议。此实现会忽略该建议。
	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, pointers and references, 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：若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能会导致迭代器、指针和引用失效，但仅当插入操作导致负载因子超过最大负载因子时才会发生。+ +`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` 可同时以 `K` 和 `Key` 调用，且 `Pred` 是透明的。这提供了异构查找能力，从而避免构造 `Key` 类型实例的开销。</class>
:1064	---	---
	Erase by Position	通过位置擦除
	Erase the element pointed to by `position`.	擦除由 `position` 指向的元素。
	Returns:;; An opaque object implicitly convertible to the `iterator` or `const_iterator` immediately following `position` prior to the erasure. Throws:;; Nothing. Notes:;; The opaque object returned must only be discarded or immediately converted to `iterator` or `const_iterator`.	返回;; 返回一个不透明对象，该对象可隐式转换为擦除前紧接在 `position` 之后的 `iterator` 或 `const++_++iterator` 。抛出;; 无。注意;; 返回的不透明对象必须被立即丢弃或转换为 `iterator` 或 `const++_++iterator` 。
:1083	---	---
	Erase by Key	通过键擦除
	```c++ size_type erase(const key_type& k); template<class K> size_type erase(K&& k); ```	```c++ size_type erase(const key_type& k); template<class k=""> size_type erase(K&& k); ```</class>
	Erase all elements with key equivalent to `k`.	擦除所有键与 `k` 等价的元素。

	English	Chinese (Simplified Han script)	Actions
	hash_function	哈希函数
	emplace_hint	emplace++_++hint
	key_eq	key++_++eq
	``` key_equal key_eq() const; ```	``` key_equal key_eq() const; ```
	Returns:;; The container's key equality predicate	返回：容器的键相等谓词。
	unlike xref:#unordered_flat_map_emplace[emplace], which simply forwards all arguments to ``value_type``'s constructor.	与 xref:#unordered_flat_map_emplace[emplace] 不同，后者只是将所有参数转发给 `value_type` 的构造函数。
	Lookup	查找
	find	find
	```c++ iterator find(const key_type& k); const_iterator find(const key_type& k) const; template<class K> iterator find(const K& k);	```c++ iterator find(const key_type& k); const_iterator find(const key_type& k) const; template<class k=""> iterator find(const K& k);</class>
	```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...>
	count	count
	`hint` is a suggestion to where the element should be inserted. This implementation ignores it.	`hint` 是一个关于元素应插入位置的建议。此实现会忽略该建议。
	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:;; This function is similiar to xref:#unordered_flat_map_emplace_hint[emplace_hint], 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：若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：此函数与 xref:#unordered_flat_map_emplace_hint[emplace_hint] 类似，区别在于：若存在等价的键，则不构造 `value_type`；否则，构造形式如下：+ + -- `c++`
	unlike xref:#unordered_flat_map_emplace_hint[emplace_hint], which simply forwards all arguments to ``value_type``'s constructor.	而非像 xref:#unordered_flat_map_emplace_hint[emplace_hint] 只是简单地将所有参数转发给 value_type 的构造函数。
	insert_or_assign	insert++_++or++_++assign
	```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, pointers and references, 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：若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能会导致迭代器、指针和引用失效，但仅当插入操作导致负载因子超过最大负载因子时才会发生。+ +`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` 可同时以 `K` 和 `Key` 调用，且 `Pred` 是透明的。这提供了异构查找能力，从而避免构造 `Key` 类型实例的开销。</class>
	Returns:;; A boolean indicating whether or not there is an element with key equal to `key` in the container 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：一个布尔值，指示容器中是否存在键等于 `key` 的元素。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` 可同时以 `K` 和 `Key` 调用，且 `Pred` 是透明的。该机制支持异构查找，从而避免实例化 `Key` 类型的开销。</class>
	Returns:;; An opaque object implicitly convertible to the `iterator` or `const_iterator` immediately following `position` prior to the erasure. Throws:;; Nothing. Notes:;; The opaque object returned must only be discarded or immediately converted to `iterator` or `const_iterator`.	返回;; 返回一个不透明对象，该对象可隐式转换为擦除前紧接在 `position` 之后的 `iterator` 或 `const++_++iterator` 。抛出;; 无。注意;; 返回的不透明对象必须被立即丢弃或转换为 `iterator` 或 `const++_++iterator` 。
	equal_range	equal++_++range
	```c++ size_type erase(const key_type& k); template<class K> size_type erase(K&& k); ```	```c++ size_type erase(const key_type& k); template<class k=""> size_type erase(K&& k); ```</class>
	Erase all elements with key equivalent to `k`.	擦除所有键与 `k` 等价的元素。
	```c++ std::pair<iterator, iterator> equal_range(const key_type& k); std::pair<const_iterator, const_iterator> equal_range(const key_type& k) const; template<class K> std::pair<iterator, iterator> equal_range(const K& k); template<class K> std::pair<const_iterator, const_iterator> equal_range(const K& k) const; ```	```c++ std::pair<iterator, iterator=""> equal_range(const key_type& k); std::pair<const_iterator, const_iterator=""> equal_range(const key_type& k) const; template<class k=""> std::pair<iterator, iterator=""> equal_range(const K& k); template<class k=""> std::pair<const_iterator, const_iterator=""> equal_range(const K& k) const; ```</const_iterator,></class></iterator,></class></const_iterator,></iterator,>
	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异常。注意：`template<class k="">` 重载仅在以下条件下参与重载决议：`Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef，且 `iterator` 和 `const_iterator` 均不能从 `K` 隐式转换。库假定 `Hash` 可同时以 `K` 和 `Key` 调用，且 `Pred` 是透明的。这提供了异构查找能力，从而避免构造 `Key` 类型实例的开销。</class>
	Erase Range	范围擦除
	```c++ iterator erase(const_iterator first, const_iterator last); ```	```c++ iterator erase(const_iterator first, const_iterator last); ```
	```c++ void swap(unordered_flat_map& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value \|\| boost::allocator_traits<Allocator>::propagate_on_container_swap::value); ```	```c++ void swap(unordered_flat_map& other) noexcept(boost::allocator_traits<allocator>::is_always_equal::value \|\| boost::allocator_traits<allocator>::propagate_on_container_swap::value); ```</allocator></allocator>
	Swaps the contents of the container with the parameter.	将容器的内容与参数进行交换。
	clear	清空
	```c++ void clear() noexcept; ```	```c++ void clear() noexcept; ```

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