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Key	English	Chinese (Simplified Han script)
	Synopsis	概要
:279	---	---
	Description	描述
	Template Parameters	模板参数
	_Key_	_键_
	`Key` must be https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^] into the container	Key 必须满足
	and https://en.cppreference.com/w/cpp/named_req/Erasable[Erasable^] from the container.	https://en.cppreference.com/w/cpp/named_req/MoveInsertable[可移动插入] 到容器中的要求，且需满足从容器中 https://en.cppreference.com/w/cpp/named_req/Erasable[可擦除] 的要求。
	_Hash_	_Hash_
	A unary function object type that acts a hash function for a `Key`. It takes a single argument of type `Key` and returns a value of type `std::size_t`.	一种为`Key`提供哈希功能的一元函数对象类型。它接受单个`Key`类型参数，并返回`std::size_t`类型的值。
	_Pred_	_Pred_
	A binary function object that induces an equivalence relation on values of type `Key`. It takes two arguments of type `Key` and returns a value of type `bool`.	一种二元函数对象，用于在Key类型的值上构建等价关系。它接受两个Key类型的参数，并返回一个bool类型的值。
	_Allocator_	_Allocator_
	An allocator whose value type is the same as the table's value type.	值类型与该表的值类型相同的分配器。
	`std::allocator_traits<Allocator>::pointer` and `std::allocator_traits<Allocator>::const_pointer` must be convertible to/from `value_type` and `const value_type`, respectively.	`std::allocator_traits<allocator>::pointer` 与 `std::allocator_traits<allocator>::const_pointer` 必须分别可与 `value_type` 和 `const value_type` 相互转换。</allocator></allocator>
	The elements of the table are held into an internal _bucket array_. An element is inserted into a bucket determined by its hash code, but if the bucket is already occupied (a _collision_), an available one in the vicinity of the original position is used.	容器的元素存储在内部的桶数组中。元素根据其哈希值被插入到对应的桶中，若该桶已被占用（即发生哈希冲突），则使用原位置附近的可用桶。
	The size of the bucket array can be automatically increased by a call to `insert`/`emplace`, or as a result of calling `rehash`/`reserve`. The _load factor_ of the table (number of elements divided by number of buckets) is never greater than `max_load_factor()`, except possibly for small sizes where the implementation may decide to allow for higher loads.	调用 `insert`/`emplace` 或执行 `rehash`/`reserve` 操作时，桶数组的大小会自动扩容。容器的负载因子（元素数量除以桶数量）永远不会超过 `max_load_factor()`，仅在尺寸较小时，实现可能允许更高的负载因子。
	If `link:../../../../../container_hash/doc/html/hash.html#ref_hash_is_avalanchinghash[hash_is_avalanching]<Hash>::value` is `true`, the hash function is used as-is; otherwise, a bit-mixing post-processing stage is added to increase the quality of hashing at the expense of extra computational cost.	若 `link:../../../../../container_hash/doc/html/hash.html#ref_hash_is_avalanchinghash[hash_is_avalanching]<hash>::value` 为 `true`，则哈希函数直接使用；否则会添加一个位混合后处理阶段，以额外的计算开销为代价提升哈希质量。</hash>
:318	---	---
	Concurrency Requirements and Guarantees	并发要求与保证
	Concurrent invocations of `operator()` on the same const instance of `Hash` or `Pred` are required to not introduce data races. For `Alloc` being either `Allocator` or any allocator type rebound from `Allocator`, concurrent invocations of the following operations on the same instance `al` of `Alloc` are required to not introduce data races:	要求对同一 `Hash` 或 `Pred` 常量实例并发调用 `operator()` 时不得引入数据竞争。对于 `Alloc` （即 `Allocator` 或其重绑定后的任意分配器类型），在同一实例 `al` 上并发调用以下操作时不得引入数据竞争：
	Copy construction from `al` of an allocator rebound from `Alloc`	通过从`Alloc`重新绑定的分配器以`al`进行拷贝构造
	`std::allocator_traits<Alloc>::allocate`	`std::allocator_traits<alloc>::allocate`</alloc>
	`std::allocator_traits<Alloc>::deallocate`	`std::allocator_traits<alloc>::deallocate`</alloc>
	`std::allocator_traits<Alloc>::construct`	`std::allocator_traits<alloc>::construct`</alloc>
	`std::allocator_traits<Alloc>::destroy`	`std::allocator_traits<alloc>::destroy`</alloc>
	In general, these requirements on `Hash`, `Pred` and `Allocator` are met if these types are not stateful or if the operations only involve constant access to internal data members.	通常而言，若 `Hash` 、 `Pred` 和 `Allocator` 这些类型不包含状态，或其操作仅涉及对内部数据成员的常量访问，即可满足上述要求。
	With the exception of destruction, concurrent invocations of any operation on the same instance of a `concurrent_flat_set` do not introduce data races — that is, they are thread-safe.	除析构操作外，对同一个 `concurrent++_++flat++_++set` 实例并发调用任何操作都不会引发数据竞争——即这些操作是线程安全的。
	If an operation op is explicitly designated as _blocking on_ `x`, where `x` is an instance of a `boost::concurrent_flat_set`, prior blocking operations on `x` synchronize with op. So, blocking operations on the same `concurrent_flat_set` execute sequentially in a multithreaded scenario.	若操作 op 显式指定为__阻塞于__ 容器 `x` （其中 `x` 是 `boost::concurrent++_++flat++_++set` 的实例），则先前对 `x` 的阻塞操作将与 op 同步。因此，在多线程场景下，对同一 `concurrent++_++flat++_++set` 的阻塞操作将按顺序执行。
	An operation is said to be _blocking on rehashing of_ ``__x__`` if it blocks on `x` only when an internal rehashing is issued.	若某个操作仅在触发内部重哈希时才会阻塞于 _`x`_，则称该操作__阻塞于 _`x`_ 的重哈希过程__。
	When executed internally by a `boost::concurrent_flat_set`, the following operations by a user-provided visitation function on the element passed do not introduce data races:	当由 `boost::concurrent++_++flat++_++set` 内部执行时，用户提供的访问函数对传入元素的以下操作不会引发数据竞争：
	Read access to the element.	对元素的读取访问。

	English	Chinese (Simplified Han script)	Actions
	```c++ template<class K, class H, class P, class A, class Predicate> typename concurrent_flat_set<K, H, P, A>::size_type erase_if(concurrent_flat_set<K, H, P, A>& c, Predicate pred); ```	```c++ template<class k,="" class="" h,="" p,="" a,="" predicate=""> typename concurrent_flat_set<k, h,="" p,="" a="">::size_type erase_if(concurrent_flat_set<k, h,="" p,="" a="">& c, Predicate pred); ```</k,></k,></class>
	Serialization	序列化
	Saving an concurrent_flat_set to an archive	将 concurrent++_++flat++_++set 保存到归档
	Requires:;; `value_type` is serializable (XML serializable), and it supports Boost.Serialization `save_construct_data`/`load_construct_data` protocol (automatically suported by https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^] types). Concurrency:;; Blocking on `x`.	要求;; `value++_++type` 必须可序列化（支持 XML 序列化），且需要支持 Boost.Serialization 的 `save++_++construct++_++data` / `load++_++construct++_++data` 协议（该协议自动支持满足 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[可默认构造] 要求的类型）。并发性;; 阻塞于 `x` 。
	`std::allocator_traits<Alloc>::deallocate`	`std::allocator_traits<alloc>::deallocate`</alloc>
	Returns:;; The number of elements in the table.	返回值：;; 哈希表中的元素总数。
	Notes:;; In the presence of concurrent insertion operations, the value returned may not accurately reflect the true size of the table right after execution.	注意：;; 在存在并发插入操作时，返回的值可能无法准确反映函数执行后哈希表的真实大小。
	max_size	max_size
	```c++ concurrent_flat_set(std::initializer_list<value_type> il, const allocator_type& a); ```	```c++ concurrent_flat_set(std::initializer_list<value_type> il, const allocator_type& a); ```</value_type>
	The internal data structure of `boost::concurrent_flat_set` is similar to that of `boost::unordered_flat_set`. As a result of its using open-addressing techniques, `value_type` must be move-constructible and pointer stability is not kept under rehashing.	`boost::concurrent++_++flat++_++set` 的内部数据结构类似于 `boost::unordered++_++flat++_++set` 。由于其采用开放寻址技术， `value++_++type` 必须满足可移动构造要求，且在重哈希过程中无法保持指针稳定性。
	Template Parameters	模板参数
	and https://en.cppreference.com/w/cpp/named_req/Erasable[Erasable^] from the container.	https://en.cppreference.com/w/cpp/named_req/MoveInsertable[可移动插入] 到容器中的要求，且需满足从容器中 https://en.cppreference.com/w/cpp/named_req/Erasable[可擦除] 的要求。
	A unary function object type that acts a hash function for a `Key`. It takes a single argument of type `Key` and returns a value of type `std::size_t`.	一种为`Key`提供哈希功能的一元函数对象类型。它接受单个`Key`类型参数，并返回`std::size_t`类型的值。
	A binary function object that induces an equivalence relation on values of type `Key`. It takes two arguments of type `Key` and returns a value of type `bool`.	一种二元函数对象，用于在Key类型的值上构建等价关系。它接受两个Key类型的参数，并返回一个bool类型的值。
	An allocator whose value type is the same as the table's value type.	值类型与该表的值类型相同的分配器。
	The size of the bucket array can be automatically increased by a call to `insert`/`emplace`, or as a result of calling `rehash`/`reserve`. The _load factor_ of the table (number of elements divided by number of buckets) is never greater than `max_load_factor()`, except possibly for small sizes where the implementation may decide to allow for higher loads.	调用 `insert`/`emplace` 或执行 `rehash`/`reserve` 操作时，桶数组的大小会自动扩容。容器的负载因子（元素数量除以桶数量）永远不会超过 `max_load_factor()`，仅在尺寸较小时，实现可能允许更高的负载因子。
	If `link:../../../../../container_hash/doc/html/hash.html#ref_hash_is_avalanchinghash[hash_is_avalanching]<Hash>::value` is `true`, the hash function is used as-is; otherwise, a bit-mixing post-processing stage is added to increase the quality of hashing at the expense of extra computational cost.	若 `link:../../../../../container_hash/doc/html/hash.html#ref_hash_is_avalanchinghash[hash_is_avalanching]<hash>::value` 为 `true`，则哈希函数直接使用；否则会添加一个位混合后处理阶段，以额外的计算开销为代价提升哈希质量。</hash>
	Concurrency Requirements and Guarantees	并发要求与保证
	Constructs an empty table with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate and `a` as the allocator, 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 `hf` 作为哈希函数、 `eql` 作为键相等性谓词、 `a` 作为分配器，并将 `++[++f, l)` 范围内的元素插入其中。
	Concurrent invocations of `operator()` on the same const instance of `Hash` or `Pred` are required to not introduce data races. For `Alloc` being either `Allocator` or any allocator type rebound from `Allocator`, concurrent invocations of the following operations on the same instance `al` of `Alloc` are required to not introduce data races:	要求对同一 `Hash` 或 `Pred` 常量实例并发调用 `operator()` 时不得引入数据竞争。对于 `Alloc` （即 `Allocator` 或其重绑定后的任意分配器类型），在同一实例 `al` 上并发调用以下操作时不得引入数据竞争：
	Copy construction from `al` of an allocator rebound from `Alloc`	通过从`Alloc`重新绑定的分配器以`al`进行拷贝构造
	`std::allocator_traits<Alloc>::allocate`	`std::allocator_traits<alloc>::allocate`</alloc>
	In general, these requirements on `Hash`, `Pred` and `Allocator` are met if these types are not stateful or if the operations only involve constant access to internal data members.	通常而言，若 `Hash` 、 `Pred` 和 `Allocator` 这些类型不包含状态，或其操作仅涉及对内部数据成员的常量访问，即可满足上述要求。
	With the exception of destruction, concurrent invocations of any operation on the same instance of a `concurrent_flat_set` do not introduce data races — that is, they are thread-safe.	除析构操作外，对同一个 `concurrent++_++flat++_++set` 实例并发调用任何操作都不会引发数据竞争——即这些操作是线程安全的。
	If an operation op is explicitly designated as _blocking on_ `x`, where `x` is an instance of a `boost::concurrent_flat_set`, prior blocking operations on `x` synchronize with op. So, blocking operations on the same `concurrent_flat_set` execute sequentially in a multithreaded scenario.	若操作 op 显式指定为__阻塞于__ 容器 `x` （其中 `x` 是 `boost::concurrent++_++flat++_++set` 的实例），则先前对 `x` 的阻塞操作将与 op 同步。因此，在多线程场景下，对同一 `concurrent++_++flat++_++set` 的阻塞操作将按顺序执行。
	An operation is said to be _blocking on rehashing of_ ``__x__`` if it blocks on `x` only when an internal rehashing is issued.	若某个操作仅在触发内部重哈希时才会阻塞于 _`x`_，则称该操作__阻塞于 _`x`_ 的重哈希过程__。
	When executed internally by a `boost::concurrent_flat_set`, the following operations by a user-provided visitation function on the element passed do not introduce data races:	当由 `boost::concurrent++_++flat++_++set` 内部执行时，用户提供的访问函数对传入元素的以下操作不会引发数据竞争：
	Non-mutable modification of the element.	对元素的非可变修改。
	Mutable modification of the element:	对元素的可变修改：
	Within a container function accepting two visitation functions, always for the first function. Within a non-const container function whose name does not contain `cvisit`, for the last (or only) visitation function.	在容器接受两个访问函数的操作中，此条件始终适用于第一个访问函数。在名称不包含 `cvisit` 的非常量容器函数中，此条件适用于最后一个（或唯一一个）访问函数。

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Chinese (Simplified Han script) 297 characters editedCurrent translationState: Translated

The size of the bucket array can be automatically increased by a call to ìnsert`/èmplace`, or as a result of calling `rehash`/`reserve`. The _load factor_ of the table (number of elements divided by number of buckets) is never greater than `max_load_factor()`, except possibly for small sizes where the implementation may decide to allow for higher loads.调用 ìnsert`/èmplace` 或执行 `rehash`/`reserve` 操作时，桶数组的大小会自动扩容。容器的负载因子（元素数量除以桶数量）永远不会超过 `max_load_factor()`，仅在尺寸较小时，实现可能允许更高的负载因子。

06/05/2026

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Chinese (Simplified Han script) 357 characters editedPrevious translationState: Needs editing (Needs rewriting)

06/05/2026

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:309

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doc/modules/ROOT/pages/reference/concurrent_flat_set_zh_Hans.adoc, string 22

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