Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Concurrent Flat Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: Postconditions:;; `size() == 0`, `max_load() >= max_load_factor() * bucket

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Key	English	Chinese (Simplified Han script)
:1451	---	---
	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 non-const 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.	依次以非常量引用为参数，对容器中的每个元素调用`f`，并删除所有`f`返回`true`的元素。执行过程将根据指定的执行策略语义进行并行化处理。
	Throws:;; Depending on the exception handling mechanism of the execution policy used, may call `std::terminate` if an exception is thrown within `f`. Notes:;; Only available in compilers supporting C++17 parallel algorithms. + + This overload only participates in overload resolution if `std::is_execution_policy_v<std::remove_cvref_t<ExecutionPolicy>>` is `true`. + + Unsequenced execution policies are not allowed.	异常：根据所使用执行策略的异常处理机制，若`f`内部抛出异常，可能会调用`std::terminate`终止程序。说明：仅在支持C++17并行算法的编译器中可用。仅当`std::is_execution_policy_v<std::remove_cvref_t<executionpolicy>>`为`true`时，该重载版本参与重载决议。不允许使用无顺序执行策略。</std::remove_cvref_t<executionpolicy>
:1469	---	---
	swap	交换
	```c++ void swap(concurrent_flat_map& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value \|\| boost::allocator_traits<Allocator>::propagate_on_container_swap::value); ```	```c++ void swap(concurrent_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 table with the parameter.	将当前容器的内容与参数容器进行交换。
	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`已定义且其值为`true`，则交换两个容器的分配器；否则，使用不相等的分配器进行交换会导致未定义行为。
	Throws:;; Nothing unless `key_equal` or `hasher` throw on swapping. Concurrency:;; Blocking on `*this` and `other`.	异常：除非`key_equal`或`hasher`在交换时抛出异常，否则不抛出任何异常。并发：会阻塞当前对象`*this`和参数对象`other`。
:1486	---	---
	clear	清空
	```c++ void clear() noexcept; ```	```c++ void clear() noexcept; ```
	Erases all elements in the table.	清空容器中的所有元素。
	Postconditions:;; `size() == 0`, `max_load() >= max_load_factor() * bucket_count()` Concurrency:;; Blocking on `*this`.	后置条件：容器大小 `size() == 0`，且 `max_load() >= max_load_factor() * bucket_count()` 并发：会阻塞当前对象 `*this`。
:1499	---	---
	merge	合并
	```c++ template<class H2, class P2> size_type merge(concurrent_flat_map<Key, T, H2, P2, Allocator>& source); template<class H2, class P2> size_type merge(concurrent_flat_map<Key, T, H2, P2, Allocator>&& source); ```	```c++ template<class h2,="" class="" p2=""> size_type merge(concurrent_flat_map<key, t,="" h2,="" p2,="" allocator="">& source); template<class h2,="" class="" p2=""> size_type merge(concurrent_flat_map<key, t,="" h2,="" p2,="" allocator="">&& source); ```</key,></class></key,></class>
	Move-inserts all the elements from `source` whose key is not already present in `*this`, and erases them from `source`.	将来源容器`source`中所有*键不存在于当前容器`this`中的元素移动插入**到当前容器，并从`source`中擦除这些元素。
	Returns:;; The number of elements inserted. Concurrency:;; Blocking on `*this` and `source`.	返回值：插入的元素数量。并发：会阻塞当前对象 `*this` 和源对象 `source`。
:1515	---	---
	Observers	观察器
	get_allocator	get_allocator
	``` allocator_type get_allocator() const noexcept; ```	``` allocator_type get_allocator() const noexcept; ```
	Returns:;; The table's allocator.	返回值：容器的分配器。
:1527	---	---
	hash_function	哈希函数
	``` hasher hash_function() const; ```	``` hasher hash_function() const; ```
	Returns:;; The table's hash function.	返回值：容器的哈希函数。
:1537	---	---

	English	Chinese (Simplified Han script)	Actions
	Insert Iterator Range and Visit	迭代器范围插入并访问
	```c++ template<class... Args> bool try_emplace(const key_type& k, Args&&... args); template<class... Args> bool try_emplace(key_type&& k, Args&&... args); template<class K, class... Args> bool try_emplace(K&& k, Args&&... args); ```	```c++ template<class... args=""> bool try_emplace(const key_type& k, Args&&... args); template<class... args=""> bool try_emplace(key_type&& k, Args&&... args); template<class k,="" class...="" args=""> bool try_emplace(K&& k, Args&&... args); ```</class></class...></class...>
	unlike xref:#concurrent_flat_map_emplace[emplace], which simply forwards all arguments to ``value_type``'s constructor.	这与 xref:#concurrent_flat_map_emplace [emplace] 不同，后者仅将所有参数转发给value_type的构造函数。
	insert_or_assign	insert_or_assign
	If there is no such element, it is added to the table as: ```c++	若不存在该元素，则将其以如下形式添加到容器中：
	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>
	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>
	Erases the element with key equivalent to `k` if it exists.	若存在键等价于`k`的元素，则删除该元素。
	Erases the element `x` with key equivalent to `k` if it exists and `f(x)` is `true`.	若存在键与 `k` 等价的元素 `x`，且 `f(x)` 返回 `true`，则删除该元素。
	```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 non-const 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.	依次以非常量引用为参数，对容器中的每个元素调用`f`，并删除所有`f`返回`true`的元素。执行过程将根据指定的执行策略语义进行并行化处理。
	swap	交换
	clear	清空
	```c++ void clear() noexcept; ```	```c++ void clear() noexcept; ```
	Erases all elements in the table.	清空容器中的所有元素。
	Postconditions:;; `size() == 0`, `max_load() >= max_load_factor() * bucket_count()` Concurrency:;; Blocking on `*this`.	后置条件：容器大小 `size() == 0`，且 `max_load() >= max_load_factor() * bucket_count()` 并发：会阻塞当前对象 `*this`。
	Returns:;; The number of elements inserted. Concurrency:;; Blocking on `*this` and `source`.	返回值：插入的元素数量。并发：会阻塞当前对象 `*this` 和源对象 `source`。
	Observers	观察器
	get_allocator	get_allocator
	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类型的值上引入等价关系。该对象接收两个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.	值类型与哈希表值类型相同的分配器。
	Allocators using https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[fancy pointers] are supported.	支持使用https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[花式指针] 的分配器。
	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。元素根据其哈希码被插入到对应的桶中，但如果该桶已被占用（即发生__冲突__），则会使用原始位置附近可用的桶。
	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.	桶数组的大小可通过调用 `insert` / `emplace` 自动增加，也可通过调用 `rehash` / `reserve` 进行调整。容器的__负载因子__（元素数量与桶数量的比值）永远不会超过 `max++_++load++_++factor()` ，但在小规模数据情况下，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` ，则直接使用哈希函数；否则，会添加一个位混合后处理阶段以提高哈希质量，但会牺牲额外的计算成本。
	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`	从Alloc重新绑定后的分配器的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>

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06/05/2026

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