Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Concurrent Node Set (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: ```c++ template<class... Args, class F1, class F2> bool emplace_or

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Key	English	Chinese (Simplified Han script)
	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>
:1138	Equivalent to [listing,subs="+macros,+quotes"]	等价于 [listing,subs="+macros,+quotes"]
:1145	Returns:;; The number of elements inserted.	返回值：;; 成功插入的元素个数。
:1147	---	---
	Insert Node or Visit	节点插入或访问
	```c++ template<class F> insert_return_type insert_or_visit(node_type&& nh, F f); template<class F> insert_return_type insert_or_cvisit(node_type&& nh, F f); ```	```c++ template<class f=""> insert_return_type insert_or_visit(node_type&& nh, F f); template<class f=""> insert_return_type insert_or_cvisit(node_type&& nh, F f); ```</class></class>
	If `nh` is empty, does nothing. Otherwise, inserts the associated element in the table if and only if there is no element in the table with a key equivalent to `nh.value()`. Otherwise, invokes `f` with a const reference to the equivalent element.	若 `nh` 为空，则不执行任何操作。否则，当且仅当哈希表中不存在与 `nh.value()` 键等价的元素时，将其关联元素插入表中；否则，以该等价元素的常量引用为参数调用函数 `f`。
:1160	Returns:;; An `insert_return_type` object constructed from `inserted` and `node`: +	返回值：;; 由 `inserted` 和 `node` 构造的 `insert_return_type` 对象。
:1161	If `nh` is empty, `inserted` is `false` and `node` is empty.	若 `nh` 为空，则 `inserted` 为 `false` 且 `node` 为空。
:1162	Otherwise if the insertion took place, `inserted` is true and `node` is empty.	若插入操作成功，则 `inserted` 为 true，且 `node` 为空。
:1163	If the insertion failed, `inserted` is false and `node` has the previous value of `nh`.	若插入操作失败，则 `inserted` 为 false ，且 `node` 保留 `nh` 的原值。
	Throws:;; If an exception is thrown by an operation other than a call to `hasher` or call to `f`, the function has no effect. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Behavior is undefined if `nh` is not empty and the allocators of `nh` and the container are not equal.	若 `nh` 为空，则不执行任何操作；否则，当且仅当容器中不存在与 `nh.value()` 等效的键时，插入其关联的元素；否则，使用指向等效元素的常量引用调用 `f` 。
:1168	---	---
	emplace_and_[c]visit	emplace_and_[c]visit
	```c++ template<class... Args, class F1, class F2> bool emplace_or_visit(Args&&... args, F1&& f1, F2&& f2); template<class... Args, class F1, class F2> bool emplace_or_cvisit(Args&&... args, F1&& f1, F2&& f2); ```	```c++ template<class... args,="" class="" f1,="" f2=""> bool emplace_or_visit(Args&&... args, F1&& f1, F2&& f2); template<class... args,="" class="" f1,="" f2=""> bool emplace_or_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.	若哈希表中不存在键等价的元素，则使用参数 `args` 构造对象并插入表中，随后以新建元素的常量引用为参数调用函数 `f1`；否则，以该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:;; The interface is exposition only, as C++ does not allow to declare parameters `f1` and `f2` after a variadic parameter pack.	要求：;; `value_type` 可由 `args` 构造。返回值：;; 若成功插入元素则返回 `true`。并发特性：;; 会阻塞当前对象的重哈希操作。注意：;; 该接口仅为说明性用法，因为 C++ 不允许在可变参数包之后声明 `f1` 和 `f2` 参数。
:1188	---	---
	Copy insert_and_[c]visit	复制 insert++_++and++_[++c++]++visit
	```c++ template<class F1, class F2> bool insert_and_visit(const value_type& obj, F1 f1, F2 f2); template<class F1, class F2> bool insert_and_cvisit(const value_type& obj, F1 f2, F2 f2); ```	```c++ template<class f1,="" class="" f2=""> bool insert_and_visit(const value_type& obj, F1 f1, F2 f2); template<class f1,="" class="" f2=""> bool insert_and_cvisit(const value_type& obj, F1 f2, F2 f2); ```</class></class>
	Inserts `obj` in the table if and only 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 `f` with a const reference to the equivalent element.	当且仅当哈希表中不存在键等价的元素时，将 `obj` 插入表中，随后以新建元素的常量引用为参数调用函数 `f1`；否则，以该等价元素的常量引用为参数调用函数 `f`。
:1201	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; `true` if an insert took place. + Concurrency:;; Blocking on rehashing of `*this`.	要求：`value_type` 支持拷贝插入。返回值：若成功插入元素则返回 `true`。并发特性：会阻塞当前对象的重哈希操作。
:1205	---	---
	Move insert_and_[c]visit	移动 insert++_++and++_[++c++]++visit
	```c++ template<class F1, class F2> bool insert_and_visit(value_type&& obj, F1 f1, F2 f2); template<class F1, class F2> bool insert_and_cvisit(value_type&& obj, F1 f1, F2 f2); ```	```c++ template<class f1,="" class="" f2=""> bool insert_and_visit(value_type&& obj, F1 f1, F2 f2); template<class f1,="" class="" f2=""> bool insert_and_cvisit(value_type&& obj, F1 f1, F2 f2); ```</class></class>
	Inserts `obj` in the table if and only 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.	当且仅当哈希表中不存在键等价的元素时，将 `obj` 插入表中，随后以新建元素的常量引用为参数调用函数 `f1`；否则，以该等价元素的常量引用为参数调用函数 `f2`。要求：`value_type` 支持拷贝插入。返回值：若成功插入元素则返回 `true`。并发特性：会阻塞当前对象的重哈希操作。
:1218	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. Returns:;; `true` if an insert took place. + Concurrency:;; Blocking on rehashing of `*this`.	要求：;; `value_type` 满足 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]。返回值：;; 插入成功则返回 `true`。并发特性：;; 会阻塞 `*this` 的重哈希操作。
:1222	---	---
	Transparent insert_and_[c]visit	透明 insert++_++and++_[++c++]++visit（透明插入并 ++[++c++]++ 访问）
	```c++ template<class K, class F1, class F2> bool insert_and_visit(K&& k, F1 f1, F2 f2); template<class K, class F1, class F2> bool insert_and_cvisit(K&& k, F1 f1, F2 f2); ```	```c++ template<class k,="" class="" f1,="" f2=""> bool insert_and_visit(K&& k, F1 f1, F2 f2); template<class k,="" class="" f1,="" f2=""> bool insert_and_cvisit(K&& k, F1 f1, F2 f2); ```</class></class>

	English	Chinese (Simplified Han script)	Actions
	```c++ size_type insert(std::initializer_list<value_type> il); ```	```c++ size_type insert(std::initializer_list<value_type> il); ```</value_type>
	Insert Node	节点插入
	count	count
	Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Behavior is undefined if `nh` is not empty and the allocators of `nh` and the container are not equal.	若 `nh` 非空，则当且仅当容器中不存在与 `nh.value()` 等效的键时，插入其关联的元素。函数返回时 `nh` 为空。
	emplace_or_[c]visit	emplace_or_[c]visit
	```c++ template<class... Args, class F> bool emplace_or_visit(Args&&... args, F&& f); template<class... Args, class F> bool emplace_or_cvisit(Args&&... args, F&& f); ```	```c++ template<class... args,="" class="" f=""> bool emplace_or_visit(Args&&... args, F&& f); template<class... args,="" class="" f=""> bool emplace_or_cvisit(Args&&... args, F&& f); ```</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. Otherwise, invokes `f` with a const reference to the equivalent element.	若哈希表中不存在键等价的元素，则使用参数 `args` 构造对象并插入表中；否则，以该等价元素的常量引用为参数调用函数 `f`。
	Requires:;; `value_type` is constructible from `args`. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; The interface is exposition only, as C++ does not allow to declare a parameter `f` after a variadic parameter pack.	要求：;; `value_type` 可由 `args` 构造。返回值：;; 若成功插入元素则返回 `true`。并发特性：;; 会阻塞当前对象 `*this` 的扩容重哈希操作。注意：;; 该接口仅为说明性用法，因为 C++ 不允许在可变参数包之后声明参数 `f`。
	```c++ template<class F> bool insert_or_visit(const value_type& obj, F f); template<class F> bool insert_or_cvisit(const value_type& obj, F f); ```	```c++ template<class f=""> bool insert_or_visit(const value_type& obj, F f); template<class f=""> bool insert_or_cvisit(const value_type& obj, F f); ```</class></class>
	```c++ template<class F> bool insert_or_visit(value_type&& obj, F f); template<class F> bool insert_or_cvisit(value_type&& obj, F f); ```	```c++ template<class f=""> bool insert_or_visit(value_type&& obj, F f); template<class f=""> bool insert_or_cvisit(value_type&& obj, F f); ```</class></class>
	```c++ template<class K, class F> bool insert_or_visit(K&& k, F f); template<class K, class F> bool insert_or_cvisit(K&& k, F f); ```	```c++ template<class k,="" class="" f=""> bool insert_or_visit(K&& k, F f); template<class k,="" class="" f=""> bool insert_or_cvisit(K&& k, F f); ```</class></class>
	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. Otherwise, invokes `f` 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，使用 `std::forward<k>(k)` 构造元素并插入容器；否则，以该等价元素的常量引用为参数调用函数 `f`。</k>
	```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>
	```c++ template<class... Args, class F1, class F2> bool emplace_or_visit(Args&&... args, F1&& f1, F2&& f2); template<class... Args, class F1, class F2> bool emplace_or_cvisit(Args&&... args, F1&& f1, F2&& f2); ```	```c++ template<class... args,="" class="" f1,="" f2=""> bool emplace_or_visit(Args&&... args, F1&& f1, F2&& f2); template<class... args,="" class="" f1,="" f2=""> bool emplace_or_cvisit(Args&&... args, F1&& f1, F2&& f2); ```</class...></class...>
	Inserts `obj` in the table if and only 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 `f` with a const reference to the equivalent element.	当且仅当哈希表中不存在键等价的元素时，将 `obj` 插入表中，随后以新建元素的常量引用为参数调用函数 `f1`；否则，以该等价元素的常量引用为参数调用函数 `f`。
	Inserts `obj` in the table if and only 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.	当且仅当哈希表中不存在键等价的元素时，将 `obj` 插入表中，随后以新建元素的常量引用为参数调用函数 `f1`；否则，以该等价元素的常量引用为参数调用函数 `f2`。要求：`value_type` 支持拷贝插入。返回值：若成功插入元素则返回 `true`。并发特性：会阻塞当前对象的重哈希操作。
	```c++ template<class F1, class F2> insert_return_type insert_and_visit(node_type&& nh, F1 f1, F2 f2); template<class F1, class F2> insert_return_type insert_and_cvisit(node_type&& nh, F1 f1, F2 f2); ```	```c++ template<class f1,="" class="" f2=""> insert_return_type insert_and_visit(node_type&& nh, F1 f1, F2 f2); template<class f1,="" class="" f2=""> insert_return_type insert_and_cvisit(node_type&& nh, F1 f1, F2 f2); ```</class></class>
	If `nh` is empty, does nothing. Otherwise, inserts the associated element in the table if and only if there is no element in the table with a key equivalent to `nh.value()`, and then invokes `f1` with a const reference to the newly inserted element. Otherwise, invokes `f2` with a const reference to the equivalent element.	若 `nh` 为空，则不执行任何操作。否则，当且仅当表中不存在与 `nh.value()` 键等价的元素时，将关联元素插入表中，随后以新插入元素的常量引用调用 `f1`；否则，以等价元素的常量引用调用 `f2`。
	Throws:;; If an exception is thrown by an operation other than a call to `hasher` or call to `f1` or `f2`, the function has no effect. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Behavior is undefined if `nh` is not empty and the allocators of `nh` and the container are not equal.	若 `nh` 为空，则不执行任何操作；否则，当且仅当容器中不存在与 `nh.value()` 等效的键时，插入其关联的元素，并使用指向新插入元素的常量引用调用 `f1` ；否则，使用指向等效元素的常量引用调用 `f2` 。
	```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.	删除键与 `k` 等价的元素（若该元素存在）。
	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）。异常：;; 仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出异常。注意：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 为合法成员类型别名时，`template<class k="">` 重载才参与重载决议。标准库假定 `Hash` 可同时接收 `K` 与 `Key` 类型参数调用，且 `Pred` 是透明的。该机制支持异构查找，避免了实例化 `Key` 类型对象的开销。</class>
	```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 `x` 存在且 `f(x)` 为 `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:;; 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）。异常：;; 仅当 `hasher`、`key_equal` 或 `f` 抛出异常时才会抛出异常。注意：;; 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。注意：;; 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` 可同时接收 `K` 与 `Key` 类型参数调用，且 `Pred` 是透明的。该机制支持异构查找，避免了实例化 `Key` 类型对象的开销。</class></class></std::remove_cvref_t<executionpolicy>
	```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`，并删除所有 `f` 返回 `true` 的元素。
	```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>

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