Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Concurrent Flat Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: Returns:;; `false` iff `f` ever returns `false`.

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Key	English	Chinese (Simplified Han script)
	Requires:;; `FwdIterator` is a https://en.cppreference.com/w/cpp/named_req/ForwardIterator[LegacyForwardIterator^] ({cpp}11 to {cpp}17), or satisfies https://en.cppreference.com/w/cpp/iterator/forward_iterator[std::forward_iterator^] ({cpp}20 and later). For `K` = `std::iterator_traits<FwdIterator>::value_type`, either `K` is `key_type` or else `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. In the latter case, 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. Returns:;; The number of elements visited.	要求：`FwdIterator` 需满足 https://en.cppreference.com/w/cpp/named_req/ForwardIterator[遗留向前迭代器^] 要求（{cpp}11 至 {cpp}17），或满足 https://en.cppreference.com/w/cpp/iterator/forward_iterator[`std::forward_iterator`^] 要求（{cpp}20 及更高版本）。对于 `K = std::iterator_traits<fwditerator>::value_type`，要么 `K` 是 `key_type`，要么 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef。在后一种情况下，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。返回：被访问的元素数量。</fwditerator>
:824	---	---
	[c]visit_all	[c]visit_all
	```c++ template<class F> size_t visit_all(F f); template<class F> size_t visit_all(F f) const; template<class F> size_t cvisit_all(F f) const; ```	```c++ template<class f=""> size_t visit_all(F f); template<class f=""> size_t visit_all(F f) const; template<class f=""> size_t cvisit_all(F f) const; ```</class></class></class>
	Successively invokes `f` with references to each of the elements in the table. Such references are const iff `*this` is const.	依次以表中每个元素的引用调用函数 f。当且仅当当前容器 *this 为常量（const）时，该引用为常量引用。
	Returns:;; The number of elements visited.	返回值：访问到的元素数量。
:840	---	---
	Parallel [c]visit_all	并行 [c]visit_all
	```c++ template<class ExecutionPolicy, class F> void visit_all(ExecutionPolicy&& policy, F f); template<class ExecutionPolicy, class F> void visit_all(ExecutionPolicy&& policy, F f) const; template<class ExecutionPolicy, class F> void cvisit_all(ExecutionPolicy&& policy, F f) const; ```	```c++ template<class executionpolicy,="" class="" f=""> void visit_all(ExecutionPolicy&& policy, F f); template<class executionpolicy,="" class="" f=""> void visit_all(ExecutionPolicy&& policy, F f) const; template<class executionpolicy,="" class="" f=""> void cvisit_all(ExecutionPolicy&& policy, F f) const; ```</class></class></class>
	Invokes `f` with references to each of the elements in the table. Such references are const iff `*this` is const. Execution is parallelized according to the semantics of the execution policy specified.	以表中每个元素的引用调用函数 f。当且仅当当前容器 *this 为常量（const）时，该引用为常量引用。执行过程将根据指定的执行策略语义进行并行化。
	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. + + These overloads only participate in overload resolution if `std::is_execution_policy_v<std::remove_cvref_t<ExecutionPolicy>>` is `true`. + + Unsequenced execution policies are not allowed.	抛出异常：根据所使用执行策略的异常处理机制，如果 f 内部抛出异常，则可能会调用 std::terminate。注意：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，这些重载版本才参与重载决议。不允许使用无序执行策略。</std::remove_cvref_t<executionpolicy>
:861	---	---
	[c]visit_while	[c]visit_while
	```c++ template<class F> bool visit_while(F f); template<class F> bool visit_while(F f) const; template<class F> bool cvisit_while(F f) const; ```	```c++ template<class f=""> bool visit_while(F f); template<class f=""> bool visit_while(F f) const; template<class f=""> bool cvisit_while(F f) const; ```</class></class></class>
	Successively invokes `f` with references to each of the elements in the table until `f` returns `false` or all the elements are visited. Such references to the elements are const iff `*this` is const.	依次以表中每个元素的引用调用函数 f，直到 f 返回 false 或遍历完所有元素。当且仅当当前容器 *this 为常量（const）时，该元素引用为常量引用。
	Returns:;; `false` iff `f` ever returns `false`.	返回值：当且仅当 f 曾返回 false 时，整体返回 false。
:878	---	---
	Parallel [c]visit_while	并行 [c]visit_while
	```c++ template<class ExecutionPolicy, class F> bool visit_while(ExecutionPolicy&& policy, F f); template<class ExecutionPolicy, class F> bool visit_while(ExecutionPolicy&& policy, F f) const; template<class ExecutionPolicy, class F> bool cvisit_while(ExecutionPolicy&& policy, F f) const; ```	```c++ template<class executionpolicy,="" class="" f=""> bool visit_while(ExecutionPolicy&& policy, F f); template<class executionpolicy,="" class="" f=""> bool visit_while(ExecutionPolicy&& policy, F f) const; template<class executionpolicy,="" class="" f=""> bool cvisit_while(ExecutionPolicy&& policy, F f) const; ```</class></class></class>
	Invokes `f` with references to each of the elements in the table until `f` returns `false` or all the elements are visited. Such references to the elements are const iff `*this` is const. Execution is parallelized according to the semantics of the execution policy specified.	以表中每个元素的引用调用函数 f，直到 f 返回 false 或遍历完所有元素。当且仅当当前容器 *this 为常量（const）时，该元素引用为常量引用。执行过程将根据指定的执行策略语义进行并行化。
	Returns:;; `false` iff `f` ever returns `false`. 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. + + These overloads only participate in overload resolution if `std::is_execution_policy_v<std::remove_cvref_t<ExecutionPolicy>>` is `true`. + + Unsequenced execution policies are not allowed. + + Parallelization implies that execution does not necessary finish as soon as `f` returns `false`, and as a result `f` may be invoked with further elements for which the return value is also `false`.	返回值：当且仅当 f 曾返回 false 时，整体返回 false。抛出异常：根据所使用执行策略的异常处理机制，如果 f 内部抛出异常，则可能会调用 std::terminate。注意：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，这些重载版本才参与重载决议。不允许使用无序执行策略。并行化意味着：即使 f 已返回 false，执行流程也不一定会立即终止；因此，f 可能还会被继续调用以处理后续元素，且这些调用同样可能返回 false。</std::remove_cvref_t<executionpolicy>
:905	---	---
	Size and Capacity	大小与容量
	empty	空
	```c++ [[nodiscard]] bool empty() const noexcept; ```	```c++ [[nodiscard]] bool empty() const noexcept; ```
	Returns:;; `size() == 0`	返回值：size() == 0
:918	---	---
	size	大小
	```c++ size_type size() const noexcept; ```	```c++ size_type size() const noexcept; ```
	Returns:;; The number of elements in the table.	返回值：表中的元素数量。
	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容器的真实大小。

	English	Chinese (Simplified Han script)	Actions
	A deduction guide will not participate in overload resolution if any of the following are true:	满足以下任一条件时，推导指引不参与重载决议：
	- It has an `InputIterator` template parameter and a type that does not qualify as an input iterator is deduced for that parameter. - It has an `Allocator` template parameter and a type that does not qualify as an allocator is deduced for that parameter. - It has a `Hash` template parameter and an integral type or a type that qualifies as an allocator is deduced for that parameter. - It has a `Pred` template parameter and a type that qualifies as an allocator is deduced for that parameter.	- 该推导指引包含 `InputIterator` 模板参数，且为此参数推导出的类型不符合输入迭代器的要求。 - 该推导指引包含 `Allocator` 模板参数，且为该参数推导出的类型不符合分配器要求。 - 该推导指引包含 `Hash` 模板参数，且为该参数推导出的类型为整型或符合分配器要求。 - 该推导指引包含 `Pred` 模板参数，且为该参数推导出的类型符合分配器要求。
	Requires:;; `x.key_equal()` is functionally equivalent to `other.key_equal()`. Concurrency:;; Blocking on `x`.	要求;; `x.key++_++equal()` 需要在功能上等价于 `other.key++_++equal()` 。并发性;; 阻塞于 `x` 。
	_T_	_T_
	Constructors	构造函数
	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...>
	Move insert_and_[c]visit	移动 insert_and_[c]visit
	Parallel erase_if	并行条件擦除
	rehash	重哈希
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^] Concurrency:;; Blocking on `*this`.	要求：`value_type` 需满足 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[可复制插入^] 要求。并发：阻塞 `*this`。
	For each element `k` in the range [`first`, `last`), if there is an element `x` in the container with key equivalent to `k`, invokes `f` with a reference to `x`. Such reference is const iff `*this` is const.	对范围 [first, last) 中的每个键 k：如果容器中存在键与 k 等价的元素 x，则以 x 的引用调用函数 f。当且仅当当前容器 *this 为常量（const）时，该引用为常量引用。
	Although functionally equivalent to individually invoking xref:concurrent_flat_map_cvisit[`[c\]visit`] for each key, bulk visitation performs generally faster due to internal streamlining optimizations. It is advisable that `std::distance(first,last)` be at least xref:#concurrent_flat_map_constants[`bulk_visit_size`] to enjoy a performance gain: beyond this size, performance is not expected to increase further.	尽管功能上等价于对每个键单独调用 [c]visit，但批量访问因内部流线型优化，通常性能更高。建议 std::distance(first,last) 至少达到 bulk_visit_size 阈值时再使用，以获得性能提升；超过该大小后，性能不会进一步提升。
	[c]visit_all	[c]visit_all
	```c++ template<class F> bool visit_while(F f); template<class F> bool visit_while(F f) const; template<class F> bool cvisit_while(F f) const; ```	```c++ template<class f=""> bool visit_while(F f); template<class f=""> bool visit_while(F f) const; template<class f=""> bool cvisit_while(F f) const; ```</class></class></class>
	Returns:;; `false` iff `f` ever returns `false`.	返回值：当且仅当 f 曾返回 false 时，整体返回 false。
	Invokes `f` with references to each of the elements in the table until `f` returns `false` or all the elements are visited. Such references to the elements are const iff `*this` is const. Execution is parallelized according to the semantics of the execution policy specified.	以表中每个元素的引用调用函数 f，直到 f 返回 false 或遍历完所有元素。当且仅当当前容器 *this 为常量（const）时，该元素引用为常量引用。执行过程将根据指定的执行策略语义进行并行化。
	Size and Capacity	大小与容量
	empty	空
	Returns:;; `size() == 0`	返回值：size() == 0
	size	大小
	```c++ template<class... Args> bool emplace(Args&&... args); ```	```c++ template<class... args=""> bool emplace(Args&&... args); ```</class...>
	Insert Iterator Range	迭代器范围插入
	```c++ size_type insert(std::initializer_list<value_type> il); ```	```c++ size_type insert(std::initializer_list<value_type> il); ```</value_type>
	Copy insert_or_[c]visit	Copy insert_or_[c]visit
	key_eq	key_eq
	``` key_equal key_eq() const; ```	``` key_equal key_eq() const; ```
	Returns:;; The table's key equality predicate.	返回值：容器的键相等性谓词。
	Map Operations	映射操作
	count	count

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