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Key	English	Chinese (Simplified Han script)
	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, and then invokes `f1` with a const reference to the newly created element. Otherwise, invokes `f2` with a const reference to the equivalent element.	当且仅当容器中不存在键等价的元素时，将通过`std::forward<k>(k)`构造的元素插入容器，随后使用新建元素的常量引用调用`f1`；否则使用等价元素的常量引用调用`f2`。</k>
:1160	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + These 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.	要求：;; `value_type` 可由 `k` 进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] 构造。返回值：;; 执行插入操作则返回 `true`。并发特性：;; 对 `*this` 执行重哈希时会阻塞。备注：;; 执行重哈希后，指向元素的指针和引用将会失效。这些重载仅当 `Hash::is_transparent` 与 `Pred::is_transparent` 为合法成员类型别名时才参与重载决议。标准库假定 `Hash` 可同时接受 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。
:1167	---	---
	Insert Iterator Range and Visit	迭代器范围插入并访问
	```c++ template<class InputIterator,class F1, class F2> size_type insert_and_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class InputIterator,class F1, class F2> size_type insert_and_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```	```c++ template<class inputiterator,class="" f1,="" class="" f2=""> size_type insert_and_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class inputiterator,class="" f1,="" class="" f2=""> size_type insert_and_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```</class></class>
:1177	Equivalent to [listing,subs="+macros,+quotes"]	等效于 [listing,subs="+macros,+quotes"]
:1184	Returns:;; The number of elements inserted.	返回值：;; 插入的元素数量。
:1186	---	---
	Insert Initializer List and Visit	初始化列表插入并访问
	```c++ template<class F1, class F2> size_type insert_and_visit(std::initializer_list<value_type> il, F1 f1, F2 f2); template<class F1, class F2> size_type insert_and_cvisit(std::initializer_list<value_type> il, F1 f1, F2 f2); ```	```c++ template<class f1,="" class="" f2=""> size_type insert_and_visit(std::initializer_list<value_type> il, F1 f1, F2 f2); template<class f1,="" class="" f2=""> size_type insert_and_cvisit(std::initializer_list<value_type> il, F1 f1, F2 f2); ```</value_type></class></value_type></class>
:1196	Equivalent to [listing,subs="+macros,+quotes"]	等效于 [listing,subs="+macros,+quotes"]
:1203	Returns:;; The number of elements inserted.	返回值：;; 插入的元素数量。
:1205	---	---
	erase	擦除
	```c++ size_type erase(const key_type& k); template<class K> size_type erase(const K& k); ```	```c++ size_type erase(const key_type& k); template<class k=""> size_type erase(const K& k); ```</class>
	Erases the element with key equivalent to `k` if it exists.	若存在键与`k`等价的元素，则将其删除。
	Returns:;; The number of elements erased (0 or 1). 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.	返回值：;; 删除的元素数量（0 或 1）。抛出：;; 仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出异常。备注：;; `template<class k="">` 重载仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 为合法成员类型别名时才参与重载决议。标准库假定 `Hash` 可同时接受 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。</class>
:1220	---	---
	erase_if by Key	通过键进行条件擦除
	```c++ template<class F> size_type erase_if(const key_type& k, F f); template<class K, class F> size_type erase_if(const K& k, F f); ```	```c++ template<class f=""> size_type erase_if(const key_type& k, F f); template<class k,="" class="" f=""> size_type erase_if(const K& k, F f); ```</class></class>
	Erases the element `x` with key equivalent to `k` if it exists and `f(x)` is `true`.	若键与`k`等价的元素存在且`f(x)`为`true`，则删除该元素`x`。
	Returns:;; The number of elements erased (0 or 1). Throws:;; Only throws an exception if it is thrown by `hasher`, `key_equal` or `f`. Notes:;; The `template<class K, class F>` overload only participates in overload resolution if `std::is_execution_policy_v<std::remove_cvref_t<ExecutionPolicy>>` is `false`. + + The `template<class K, class F>` 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.	返回值：;; 删除的元素数量（0 或 1）。抛出：;; 仅当 `hasher`、`key_equal` 或 `f` 抛出异常时才会抛出异常。备注：;; 仅当 `std::is_execution_policy_v<std::remove_cvref_t<executionpolicy>>` 为 `false` 时，`template<class k,="" class="" f="">` 重载才参与重载决议。仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 为合法成员类型别名时，`template<class k,="" class="" f="">` 重载才参与重载决议。标准库假定 `Hash` 可同时接受 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。</class></class></std::remove_cvref_t<executionpolicy>
:1237	---	---
:1239	erase_if	erase++_++if
	```c++ template<class F> size_type erase_if(F f); ```	```c++ template<class f=""> size_type erase_if(F f); ```</class>
	Successively invokes `f` with references to each of the elements in the table, and erases those for which `f` returns `true`.	依次以表中每个元素的引用调用`f`，并删除`f`返回`true`的元素。
	Returns:;; The number of elements erased. Throws:;; Only throws an exception if it is thrown by `f`.	返回值：;; 删除的元素数量。抛出：;; 仅当 `f` 抛出异常时才会抛出异常。
:1250	---	---
	Parallel erase_if	并行条件擦除
	```c++ template<class ExecutionPolicy, class F> void erase_if(ExecutionPolicy&& policy, F f); ```	```c++ template<class executionpolicy,="" class="" f=""> void erase_if(ExecutionPolicy&& policy, F f); ```</class>
	Invokes `f` with references to each of the elements in the table, and erases those for which `f` returns `true`. Execution is parallelized according to the semantics of the execution policy specified.	以表中每个元素的引用调用`f`，并删除`f`返回`true`的元素。执行过程将根据指定执行策略的语义进行并行化。

	English	Chinese (Simplified Han script)	Actions
	Insert Iterator Range or Visit	迭代器范围插入或访问
	Insert Initializer List and Visit	初始化列表插入并访问
	```c++ template<class InputIterator,class F> size_type insert_or_visit(InputIterator first, InputIterator last, F f); template<class InputIterator,class F> size_type insert_or_cvisit(InputIterator first, InputIterator last, F f); ```	```c++ template<class inputiterator,class="" f=""> size_type insert_or_visit(InputIterator first, InputIterator last, F f); template<class inputiterator,class="" f=""> size_type insert_or_cvisit(InputIterator first, InputIterator last, F f); ```</class></class>
	Insert Initializer List or Visit	初始化列表插入或访问
	```c++ template<class F> size_type insert_or_visit(std::initializer_list<value_type> il, F f); template<class F> size_type insert_or_cvisit(std::initializer_list<value_type> il, F f); ```	```c++ template<class f=""> size_type insert_or_visit(std::initializer_list<value_type> il, F f); template<class f=""> size_type insert_or_cvisit(std::initializer_list<value_type> il, F f); ```</value_type></class></value_type></class>
	emplace_and_[c]visit	emplace_and_[c]visit
	```c++ template<class... Args, class F1, class F2> bool emplace_and_visit(Args&&... args, F1&& f1, F2&& f2); template<class... Args, class F1, class F2> bool emplace_and_cvisit(Args&&... args, F1&& f1, F2&& f2); ```	```c++ template<class... args,="" class="" f1,="" f2=""> bool emplace_and_visit(Args&&... args, F1&& f1, F2&& f2); template<class... args,="" class="" f1,="" f2=""> bool emplace_and_cvisit(Args&&... args, F1&& f1, F2&& f2); ```</class...></class...>
	Inserts an object, constructed with the arguments `args`, in the table if there is no element in the table with an equivalent key, and then invokes `f1` with a const reference to the newly created element. Otherwise, invokes `f2` with a const reference to the equivalent element.	若哈希表中不存在等价键的元素，则使用参数 `args` 构造对象并插入表中，随后以新创建元素的常量引用为参数调用函数 `f1`；否则，以等价元素的常量引用为参数调用函数 `f2`。
	Requires:;; `value_type` is constructible from `args`. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + The interface is exposition only, as C++ does not allow to declare parameters `f1` and `f2` after a variadic parameter pack.	前置要求：;; `value_type` 可由参数 `args` 构造。返回值：;; 成功插入元素时返回 `true`。并发特性：;; 若触发重哈希，则会阻塞当前对象 `*this`。注意：;; 若执行重哈希，将使指向元素的指针和引用失效。该接口仅为说明性设计，因为 C++ 不允许在可变参数包之后声明参数 `f1` 和 `f2`。
	Transparent insert_and_[c]visit	透明 insert++_++and++_[++c++]++visit（透明插入并 ++[++c++]++ 访问）
	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, and then invokes `f1` with a const reference to the newly created element. Otherwise, invokes `f2` with a const reference to the equivalent element.	当且仅当容器中不存在键等价的元素时，将通过`std::forward<k>(k)`构造的元素插入容器，随后使用新建元素的常量引用调用`f1`；否则使用等价元素的常量引用调用`f2`。</k>
	```c++ template<class InputIterator,class F1, class F2> size_type insert_and_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class InputIterator,class F1, class F2> size_type insert_and_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```	```c++ template<class inputiterator,class="" f1,="" class="" f2=""> size_type insert_and_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class inputiterator,class="" f1,="" class="" f2=""> size_type insert_and_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```</class></class>
	```c++ template<class F1, class F2> size_type insert_and_visit(std::initializer_list<value_type> il, F1 f1, F2 f2); template<class F1, class F2> size_type insert_and_cvisit(std::initializer_list<value_type> il, F1 f1, F2 f2); ```	```c++ template<class f1,="" class="" f2=""> size_type insert_and_visit(std::initializer_list<value_type> il, F1 f1, F2 f2); template<class f1,="" class="" f2=""> size_type insert_and_cvisit(std::initializer_list<value_type> il, F1 f1, F2 f2); ```</value_type></class></value_type></class>
	erase	擦除
	```c++ size_type erase(const key_type& k); template<class K> size_type erase(const K& k); ```	```c++ size_type erase(const key_type& k); template<class k=""> size_type erase(const K& k); ```</class>
	Erases the element with key equivalent to `k` if it exists.	若存在键与`k`等价的元素，则将其删除。
	```c++ template<class Key, class Hash, class Pred, class Alloc> void swap(concurrent_flat_set<Key, Hash, Pred, Alloc>& x, concurrent_flat_set<Key, Hash, Pred, Alloc>& y) noexcept(noexcept(x.swap(y))); ```	```c++ template<class key,="" class="" hash,="" pred,="" alloc=""> void swap(concurrent_flat_set<key, hash,="" pred,="" alloc="">& x, concurrent_flat_set<key, hash,="" pred,="" alloc="">& y) noexcept(noexcept(x.swap(y))); ```</key,></key,></class>
	Returns:;; The number of elements erased (0 or 1). 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.	返回值：;; 删除的元素数量（0 或 1）。抛出：;; 仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出异常。备注：;; `template<class k="">` 重载仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 为合法成员类型别名时才参与重载决议。标准库假定 `Hash` 可同时接受 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。</class>
	Erases the element `x` with key equivalent to `k` if it exists and `f(x)` is `true`.	若键与`k`等价的元素存在且`f(x)`为`true`，则删除该元素`x`。
	Returns:;; The number of elements erased (0 or 1). Throws:;; Only throws an exception if it is thrown by `hasher`, `key_equal` or `f`. Notes:;; The `template<class K, class F>` overload only participates in overload resolution if `std::is_execution_policy_v<std::remove_cvref_t<ExecutionPolicy>>` is `false`. + + The `template<class K, class F>` 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.	返回值：;; 删除的元素数量（0 或 1）。抛出：;; 仅当 `hasher`、`key_equal` 或 `f` 抛出异常时才会抛出异常。备注：;; 仅当 `std::is_execution_policy_v<std::remove_cvref_t<executionpolicy>>` 为 `false` 时，`template<class k,="" class="" f="">` 重载才参与重载决议。仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 为合法成员类型别名时，`template<class k,="" class="" f="">` 重载才参与重载决议。标准库假定 `Hash` 可同时接受 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。</class></class></std::remove_cvref_t<executionpolicy>
	Parallel erase_if	并行条件擦除
	Invokes `f` with references to each of the elements in the table, and erases those for which `f` returns `true`. Execution is parallelized according to the semantics of the execution policy specified.	以表中每个元素的引用调用`f`，并删除`f`返回`true`的元素。执行过程将根据指定执行策略的语义进行并行化。
	```c++ void swap(concurrent_flat_set& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value \|\| boost::allocator_traits<Allocator>::propagate_on_container_swap::value); ```	```c++ void swap(concurrent_flat_set& other) noexcept(boost::allocator_traits<allocator>::is_always_equal::value \|\| boost::allocator_traits<allocator>::propagate_on_container_swap::value); ```</allocator></allocator>
	If `Allocator::propagate_on_container_swap` is declared and `Allocator::propagate_on_container_swap::value` is `true` then the tables' allocators are swapped. Otherwise, swapping with unequal allocators results in undefined behavior.	若`Allocator::propagate_on_container_swap`已声明且`Allocator::propagate_on_container_swap::value`为`true`，则交换两个表的分配器。否则，使用不相等的分配器进行交换会导致未定义行为。
	Postconditions:;; `size() == 0`, `max_load() >= max_load_factor() * bucket_count()` Concurrency:;; Blocking on `*this`.	后置条件：;; `size() == 0`，`max_load() >= max_load_factor() * bucket_count()` 并发：;; 阻塞`*this`。
	merge	合并
	```c++ template<class H2, class P2> size_type merge(concurrent_flat_set<Key, H2, P2, Allocator>& source); template<class H2, class P2> size_type merge(concurrent_flat_set<Key, H2, P2, Allocator>&& source); ```	```c++ template<class h2,="" class="" p2=""> size_type merge(concurrent_flat_set<key, h2,="" p2,="" allocator="">& source); template<class h2,="" class="" p2=""> size_type merge(concurrent_flat_set<key, h2,="" p2,="" allocator="">&& source); ```</key,></class></key,></class>
	Returns:;; The table's allocator.	返回值：;; 表的分配器。
	hash_function	哈希函数
	``` hasher hash_function() const; ```	``` hasher hash_function() const; ```

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