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	```c++ std::pair<iterator, bool> insert(const value_type& obj); ```	```c++ std::pair<iterator, bool=""> insert(const value_type& obj); ```</iterator,>
:739	Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中不存在具有等价键的元素时，才将 `obj` 插入容器中。
:742	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. 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.	要求：;; `value_type` 必须是 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]。返回：;; 如果进行了插入，则返回类型的 `bool` 分量为 `true`。如果进行了插入，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。备注：;; 可能会使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。
:749	---	---
	Move Insert	移动插入
	```c++ std::pair<iterator, bool> insert(value_type&& obj); ```	```c++ std::pair<iterator, bool=""> insert(value_type&& obj); ```</iterator,>
:756	Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中不存在具有等价键的元素时，才将 `obj` 插入容器中。
:759	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. 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.	要求：;; `value_type` 必须是 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]。返回：;; 如果进行了插入，则返回类型的 `bool` 分量为 `true`。如果进行了插入，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。备注：;; 可能会使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。
:766	---	---
	Transparent Insert	透明插入
	```c++ template<class K> std::pair<iterator, bool> insert(K&& k); ```	```c++ template<class k=""> std::pair<iterator, bool=""> insert(K&& k); ```</iterator,></class>
:773	Inserts an element constructed from `std::forward<K>(k)` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中不存在具有等价键的元素时，才插入一个从 `std::forward<k>(k)` 构造的元素。</k>
:776	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `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. + + This 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.	要求：;; `value_type` 可以从 `k` 进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^]。返回：;; 如果进行了插入，则返回类型的 bool 分量为 true。如果进行了插入，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。备注：;; 可能会使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。此外，仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef，并且 `K` 不能隐式转换为 `iterator` 或 `const_iterator` 时，此重载才会参与重载决议。库假定 `Hash` 可同时以 `K` 和 `Key` 类型调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型的开销。
:785	---	---
	Copy Insert with Hint	带提示的复制插入
	```c++ iterator insert(const_iterator hint, const value_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); ```当且仅当容器中不存在具有等价键的元素时，才将 `obj` 插入容器中。
:793	`hint` is a suggestion to where the element should be inserted. This implementation ignores it.	`hint` 是关于元素应该插入位置的一个提示。此实现会忽略它。
:796	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. 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.	要求：;; `value_type` 必须是 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]。返回：;; 如果进行了插入，则返回类型的 `bool` 分量为 `true`。如果进行了插入，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。备注：;; 可能会使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。
:803	---	---
	Move Insert with Hint	带提示的移动插入
	```c++ iterator insert(const_iterator hint, value_type&& obj); ```	```c++ iterator insert(const_iterator hint, value_type&& obj); ```
:810	Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中不存在具有等价键的元素时，才将 `obj` 插入容器中。
:812	`hint` is a suggestion to where the element should be inserted. This implementation ignores it.	`hint` 是关于元素应该插入位置的一个提示。此实现会忽略它。
:815	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. 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.	要求：;; `value_type` 必须是 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]。返回：;; 如果进行了插入，则返回类型的 `bool` 分量为 `true`。如果进行了插入，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。备注：;; 可能会使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。
:822	---	---
	Transparent Insert with Hint	带提示的透明插入
	```c++ template<class K> std::pair<iterator, bool> insert(const_iterator hint, K&& k); ```	```c++ template<class k=""> std::pair<iterator, bool=""> insert(const_iterator hint, K&& k); ```</iterator,></class>
:829	Inserts an element constructed from `std::forward<K>(k)` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中不存在具有等价键的元素时，才插入一个从 `std::forward<k>(k)` 构造的元素。</k>
:831	`hint` is a suggestion to where the element should be inserted. This implementation ignores it.	`hint` 是关于元素应该插入位置的一个提示。此实现会忽略它。
:834	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `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. + + This 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.	要求：;; `value_type` 可以从 `k` 进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^]。返回：;; 如果进行了插入，则返回类型的 bool 分量为 true。如果进行了插入，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。备注：;; 可能会使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。此重载仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef，并且 `K` 不能隐式转换为 `iterator` 或 `const_iterator` 时，才会参与重载决议。库假定 `Hash` 可同时以 `K` 和 `Key` 类型调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型的开销。
:843	---	---

	English	Chinese (Simplified Han script)	Actions
	If `a == other.get_allocator()`, the elements of `other` are transferred directly to the new container; otherwise, elements are moved-constructed from those of `other`. The hash function and predicate are moved-constructed from `other`, and the allocator is copy-constructed from `a`. If statistics are xref:unordered_flat_set_boost_unordered_enable_stats[enabled], transfers the internal statistical information from `other` iff `a == other.get_allocator()`, and always calls `other.reset_stats()`.	如果 `a == other.get_allocator()`，则 `other` 的元素会直接转移给新容器；否则，将根据 `other` 中的元素进行移动构造。哈希函数和谓词从 `other` 进行移动构造，而分配器则从 `a` 进行复制构造。如果启用了统计信息（xref:unordered_flat_set_boost_unordered_enable_stats[enabled]），则仅当 `a == other.get_allocator()` 时才从 `other` 转移内部统计信息，并且总是调用 `other.reset_stats()`。
	Move construction from a xref:#concurrent_flat_set[`concurrent_flat_set`]. The internal bucket array of `other` is transferred directly to the new container. The hash function, predicate and allocator are moved-constructed from `other`. If statistics are xref:unordered_flat_set_boost_unordered_enable_stats[enabled], transfers the internal statistical information from `other` and calls `other.reset_stats()`.	从 xref:#concurrent_flat_set[`concurrent_flat_set`] 进行移动构造。`other` 的内部桶数组将直接转移给新容器。哈希函数、谓词和分配器从 `other` 进行移动构造。如果启用了统计信息（xref:unordered_flat_set_boost_unordered_enable_stats[enabled]），则从 `other` 转移内部统计信息，并调用 `other.reset_stats()`。
	Initializer List Constructor	初始化列表构造函数
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate and `a`, and inserts the elements from `il` into it.	构造一个至少包含 `n` 个桶的空容器，使用 `hf` 作为哈希函数，`eql` 作为键相等谓词，`a` 作为分配器，并将 `il` 中的元素插入其中。
	Bucket Count Constructor with Allocator	带分配器的桶数构造函数
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, the default hash function and key equality predicate and `a` as the allocator.	构造一个至少包含 `n` 个桶的空容器，使用 `hf` 作为哈希函数，默认的哈希函数和键相等谓词，并以 `a` 作为分配器。
	Postconditions:;; `size() == 0` Requires:;; `hasher` and `key_equal` need to be https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].	后置条件：;; `size() == 0` 要求：;; `hasher` 和 `key_equal` 需要是 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^]。
	```c++ unordered_flat_set(size_type n, hasher const& hf, allocator_type const& a); ```	```c++ unordered_flat_set(size_type n, hasher const& hf, allocator_type const& a); ```
	Postconditions:;; `size() == 0` Requires:;; `key_equal` needs to be https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].	后置条件：;; `size() == 0` 要求：;; `key_equal` 需要是 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^]。
	Iterator Range Constructor with Bucket Count and Allocator	带桶数和分配器的迭代器范围构造函数
	Constructs an empty container with at least `n` buckets, using `a` as the allocator and default hash function and key equality predicate, and inserts the elements from `[f, l)` into it.	构造一个至少包含 `n` 个桶的空容器，使用 `a` 作为分配器以及默认的哈希函数和键相等谓词，并将 `[f, l)` 范围内的元素插入其中。
	initializer_list Constructor with Allocator	带分配器的初始化列表构造函数
	```c++ unordered_flat_set(std::initializer_list<value_type> il, const allocator_type& a); ```	```c++ unordered_flat_set(std::initializer_list<value_type> il, const allocator_type& a); ```</value_type>
	Constructs an empty container using `a` and default hash function and key equality predicate, and inserts the elements from `il` into it.	使用 `a` 以及默认的哈希函数和键相等谓词构造一个空容器，并将 `il` 中的元素插入其中。
	Copy Insert with Hint	带提示的复制插入
	```c++ iterator insert(const_iterator hint, const value_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); ```当且仅当容器中不存在具有等价键的元素时，才将 `obj` 插入容器中。
	Transparent Insert with Hint	带提示的透明插入
	```c++ template<class K> std::pair<iterator, bool> insert(const_iterator hint, K&& k); ```	```c++ template<class k=""> std::pair<iterator, bool=""> insert(const_iterator hint, K&& k); ```</iterator,></class>
	Effects:;; Sets to zero the internal statistics kept by the container. Notes:;; Only available if xref:reference/stats.adoc#stats[statistics calculation] is xref:unordered_flat_set_boost_unordered_enable_stats[enabled].	效果：;; 将容器内部保持的统计信息归零。备注：;; 仅在 xref:reference/stats.adoc#stats[统计信息计算] 已 xref:unordered_flat_set_boost_unordered_enable_stats[启用] 时可用。
	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, pointers and references, but only if the insert causes the load to be greater than the maximum load.	要求：;; `value_type` 可以从 `*first` 进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] 到容器中。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。备注：;; 可能会使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。
	```c++ iterator erase(const_iterator first, const_iterator last); ```	```c++ iterator erase(const_iterator first, const_iterator last); ```
	```c++ void swap(unordered_flat_set& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value \|\| boost::allocator_traits<Allocator>::propagate_on_container_swap::value); ```	```c++ void swap(unordered_flat_set& other) noexcept(boost::allocator_traits<allocator>::is_always_equal::value \|\| boost::allocator_traits<allocator>::propagate_on_container_swap::value); ```</allocator></allocator>
	```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` `x`，删除该元素并返回 `x`。
	```c++ template<class H2, class P2> void merge(unordered_flat_set<Key, T, H2, P2, Allocator>& source); template<class H2, class P2> void merge(unordered_flat_set<Key, T, H2, P2, Allocator>&& source); ```	```c++ template<class h2,="" class="" p2=""> void merge(unordered_flat_set<key, t,="" h2,="" p2,="" allocator="">& source); template<class h2,="" class="" p2=""> void merge(unordered_flat_set<key, t,="" h2,="" p2,="" allocator="">&& source); ```</key,></class></key,></class>
	Returns:;; A range containing all elements with key equivalent to `k`. If the container doesn't contain any such elements, returns `std::make_pair(b.end(), b.end())`. Notes:;; The `template<class K>` overloads only participate 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：;; 一个范围，包含所有键与 `k` 等价的元素。若容器中不包含任何此类元素，则返回 `std::make_pair(b.end(), b.end())`。备注：;; `template<class k="">` 重载仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时才会参与重载决议。库假定 `Hash` 可同时以 `K` 和 `Key` 类型调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型的开销。</class>
	Equivalent to `a.rehash(ceil(n / a.max_load_factor()))`.	等价于 `a.rehash(ceil(n / a.max_load_factor()))`。
	Similar to `rehash`, this function can be used to grow or shrink the number of buckets in the container.	与 `rehash` 类似，此函数可用于增加或减少容器中桶的数量。
	Returns:;; A statistical description of the insertion and lookup operations performed by the container so far. Notes:;; Only available if xref:reference/stats.adoc#stats[statistics calculation] is xref:unordered_flat_set_boost_unordered_enable_stats[enabled].	返回：;; 对容器迄今为止所执行的插入和查找操作的统计描述。备注：;; 仅在 xref:reference/stats.adoc#stats[统计信息计算] 已 xref:unordered_flat_set_boost_unordered_enable_stats[启用] 时可用。
	reset_stats	reset_stats

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