Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Concurrent Node Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: Returns:;; The number of elements erased. Throws:;; Only throws an …

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Key	English	Chinese (Simplified Han script)
	Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; The `template<class K, class M>` 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：;; 若执行插入操作则返回 `true`。并发特性：;; 阻塞对 `*this` 的重哈希操作。注意：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员类型别名时，`template<class k,="" class="" m="">` 才参与重载决议。库假定 `Hash` 可同时接受 `K` 类型与 `Key` 类型作为参数，且 `Pred` 是透明的。这支持异构查找，从而避免实例化 `Key` 类型对象带来的性能开销。</class>
:1494	---	---
	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，则删除该元素。
	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）。抛出异常：;; 仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。注意：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员类型别名时，`template<class k="">` 重载版本才参与重载决议。库假定 `Hash` 可同时接受 `K` 类型与 `Key` 类型作为参数，且 `Pred` 是透明的。这支持异构查找，从而避免实例化 `Key` 类型对象带来的性能开销。</class>
:1509	---	---
	erase_if by Key	erase_if by Key
	```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`.	若存在键与 `k` 等价的元素 `x`，且 `f(x)` 返回 `true`，则删除该元素。
	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:;; `f` is passed a non-const reference to `x`. + + 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）。抛出异常：;; 仅当 `hasher`、`key_equal` 或 `f` 抛出异常时才会抛出。注意：;; `f` 接收指向 `x` 的非常量引用。 `template<class k,="" class="" f="">` 重载版本仅在 `std::is_execution_policy_v<std::remove_cvref_t<executionpolicy>>` 为 `false` 时参与重载决议。 `template<class k,="" class="" f="">` 重载版本仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 为有效成员类型别名时参与重载决议。库假定 `Hash` 可同时接受 `K` 类型与 `Key` 类型作为参数，且 `Pred` 是透明的。这支持异构查找，从而避免实例化 `Key` 类型对象带来的性能开销。</class></std::remove_cvref_t<executionpolicy></class>
:1528	---	---
:1530	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 non-const references to each of the elements in the table, and erases those for which `f` returns `true`.	依次以非常量引用为参数，对表中的每个元素调用 `f`，并删除所有 `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：;; 删除的元素总数。抛出异常：;; 仅当 `f` 抛出异常时才会抛出。
:1541	---	---
	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.	根据指定执行策略的语义并行执行操作：依次以非常量引用为参数对表中的每个元素调用 `f`，并删除所有 `f` 返回 `true` 的元素。
	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.	抛出异常：;; 依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`。注意：;; 仅在支持 C++17 并行算法的编译器中可用。该重载版本仅在`std::is_execution_policy_v<std::remove_cvref_t<executionpolicy>>` 为 `true` 时参与重载决议。不允许使用无序执行策略。</std::remove_cvref_t<executionpolicy>
:1559	---	---
	swap	交换
	```c++ void swap(concurrent_node_map& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value \|\| boost::allocator_traits<Allocator>::propagate_on_container_swap::value); ```	```c++ void swap(concurrent_node_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.	将当前表与参数表的内容进行交换。
	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.	若声明了 `Allocator::propagate_on_container_swap` 且其值为 `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。
	Throws:;; Nothing unless `key_equal` or `hasher` throw on swapping. Concurrency:;; Blocking on `*this` and `other`.	抛出异常：;; 除非 `key_equal` 或 `hasher` 在交换时抛出异常，否则不抛出任何异常。并发特性：;; 阻塞当前容器 `*this` 与目标容器 `other`。
:1576	---	---
	extract	extract
	```c++ node_type extract(const key_type& k); template<class K> node_type extract(K&& k); ```	```c++ node_type extract(const key_type& k); template<class k=""> node_type extract(K&& k); ```</class>
	Extracts the element with key equivalent to `k`, if it exists.	若存在键与 `k` 等价的元素，则提取该元素。

	English	Chinese (Simplified Han script)	Actions
	insert_or_assign	insert_or_assign
	```c++ template<class M> bool insert_or_assign(const key_type& k, M&& obj); template<class M> bool insert_or_assign(key_type&& k, M&& obj); template<class K, class M> bool insert_or_assign(K&& k, M&& obj); ```	```c++ template<class m=""> bool insert_or_assign(const key_type& k, M&& obj); template<class m=""> bool insert_or_assign(key_type&& k, M&& obj); template<class k,="" class="" m=""> bool insert_or_assign(K&& k, M&& obj); ```</class></class></class>
	Inserts a new element into the table or updates an existing one by assigning to the contained value.	向表中插入新元素，或通过为已包含的值赋值来更新现有元素。
	If there is an element with key `k`, then it is updated by assigning `std::forward<M>(obj)`.	若表中存在键为`k`的元素，则通过`std::forward<m>(obj)`赋值来更新该元素。</m>
	If there is no such element, it is added to the table as: ```c++	若不存在该元素，则以如下形式添加到表中：
	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>
	Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; The `template<class K, class M>` 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：;; 若执行插入操作则返回 `true`。并发特性：;; 阻塞对 `*this` 的重哈希操作。注意：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员类型别名时，`template<class k,="" class="" m="">` 才参与重载决议。库假定 `Hash` 可同时接受 `K` 类型与 `Key` 类型作为参数，且 `Pred` 是透明的。这支持异构查找，从而避免实例化 `Key` 类型对象带来的性能开销。</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，则删除该元素。
	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）。抛出异常：;; 仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。注意：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员类型别名时，`template<class k="">` 重载版本才参与重载决议。库假定 `Hash` 可同时接受 `K` 类型与 `Key` 类型作为参数，且 `Pred` 是透明的。这支持异构查找，从而避免实例化 `Key` 类型对象带来的性能开销。</class>
	erase_if by Key	erase_if by Key
	```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`.	若存在键与 `k` 等价的元素 `x`，且 `f(x)` 返回 `true`，则删除该元素。
	Successively invokes `f` with non-const references to each of the elements in the table, and erases those for which `f` returns `true`.	依次以非常量引用为参数，对表中的每个元素调用 `f`，并删除所有 `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：;; 删除的元素总数。抛出异常：;; 仅当 `f` 抛出异常时才会抛出。
	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.	根据指定执行策略的语义并行执行操作：依次以非常量引用为参数对表中的每个元素调用 `f`，并删除所有 `f` 返回 `true` 的元素。
	```c++ void swap(concurrent_node_map& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value \|\| boost::allocator_traits<Allocator>::propagate_on_container_swap::value); ```	```c++ void swap(concurrent_node_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.	将当前表与参数表的内容进行交换。
	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.	若声明了 `Allocator::propagate_on_container_swap` 且其值为 `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。
	Throws:;; Nothing unless `key_equal` or `hasher` throw on swapping. Concurrency:;; Blocking on `*this` and `other`.	抛出异常：;; 除非 `key_equal` 或 `hasher` 在交换时抛出异常，否则不抛出任何异常。并发特性：;; 阻塞当前容器 `*this` 与目标容器 `other`。
	extract	extract
	```c++ node_type extract(const key_type& k); template<class K> node_type extract(K&& k); ```	```c++ node_type extract(const key_type& k); template<class k=""> node_type extract(K&& k); ```</class>
	Extracts the element with key equivalent to `k`, if it exists.	若存在键与 `k` 等价的元素，则提取该元素。
	```c++ template<class H2, class P2> size_type merge(concurrent_node_map<Key, T, H2, P2, Allocator>& source); template<class H2, class P2> size_type merge(concurrent_node_map<Key, T, H2, P2, Allocator>&& source); ```	```c++ template<class h2,="" class="" p2=""> size_type merge(concurrent_node_map<key, t,="" h2,="" p2,="" allocator="">& source); template<class h2,="" class="" p2=""> size_type merge(concurrent_node_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` 中删除这些元素。
	Returns:;; The number of elements inserted. Concurrency:;; Blocking on `*this` and `source`.	返回值：;; 插入的元素数量。并发特性：;; 阻塞当前容器 `*this` 与源容器 `source`。
	Observers	观察器

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