Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Concurrent Flat Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: unlike xref:#concurrent_flat_map_emplace[emplace], which simply forwards all arguments to ``value

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	```c++ template<class InputIterator, class F1, class F2> size_type insert_or_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class InputIterator, class F1, class F2> size_type insert_or_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```	```c++ template<class inputiterator,="" class="" f1,="" f2=""> size_type insert_or_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class inputiterator,="" class="" f1,="" f2=""> size_type insert_or_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```</class></class>
:1208	Equivalent to [listing,subs="+macros,+quotes"]	等效于 [listing,subs="+macros,+quotes"]
:1215	Returns:;; The number of elements inserted.	返回值：插入的元素数量。
:1217	---	---
	Insert Initializer List and Visit	初始化列表插入并访问
	```c++ template<class F1, class F2> size_type insert_and_visit(std::initializer_list<value_type> il, F1 f1, F2 f2); template<class F1, class F2> size_type insert_and_cvisit(std::initializer_list<value_type> il, F1 f1, F2 f2); ```	```c++ template<class f1,="" class="" f2=""> size_type insert_and_visit(std::initializer_list<value_type> il, F1 f1, F2 f2); template<class f1,="" class="" f2=""> size_type insert_and_cvisit(std::initializer_list<value_type> il, F1 f1, F2 f2); ```</value_type></class></value_type></class>
:1227	Equivalent to [listing,subs="+macros,+quotes"]	等效于 [listing,subs="+macros,+quotes"]
:1234	Returns:;; The number of elements inserted.	返回值：插入的元素数量。
:1236	---	---
	try_emplace	try_emplace
	```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...>
	Inserts an element constructed from `k` and `args` into the table if there is no existing element with key `k` contained within it.	若容器中不存在键为k的元素，则将由k和args构造的元素插入容器。
	Returns:;; `true` if an insert took place. + Concurrency:;; Blocking on rehashing of `*this`. Notes:;; This function is similiar to xref:#concurrent_flat_map_emplace[emplace], with the difference that no `value_type` is constructed if there is an element with an equivalent key; otherwise, the construction is of the form: + + -- ```c++	返回值：插入成功则返回true。并发：对当前对象*this进行重哈希时阻塞。说明：该函数与 xref:#concurrent_flat_map_emplace [emplace] 类似，区别在于若存在等价键的元素，则不会构造value_type；否则，构造形式为：
:1256	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<Key>(k)), std::forward_as_tuple(std::forward<Args>(args)...))	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<key>(k)), std::forward_as_tuple(std::forward<args>(args)...))</args></key>
:1261	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<Args>(args)...)) ```	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<k>(k)), std::forward_as_tuple(std::forward<args>(args)...)) ```</args></k>
	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。
:1268	Invalidates pointers and references to elements if a rehashing is issued.	Invalidates pointers and references to elements if a rehashing is issued.
	The `template<class K, class\... Args>` 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.	若`Hash::is_transparent`与`Pred::is_transparent`为合法的成员类型别名，则`template<class k,="" args="">`重载版本才会参与重载决议。库假定`Hash`可同时接收`K`与`Key`类型参数调用，且`Pred`为透明比较器。该设计支持异构查找，避免了实例化`Key`类型对象的开销。</class>
:1272	--	--
:1274	---	---
	try_emplace_or_[c]visit	try_emplace_or_[c]visit
	```c++ template<class... Args, class F> bool try_emplace_or_visit(const key_type& k, Args&&... args, F&& f); template<class... Args, class F> bool try_emplace_or_cvisit(const key_type& k, Args&&... args, F&& f); template<class... Args, class F> bool try_emplace_or_visit(key_type&& k, Args&&... args, F&& f); template<class... Args, class F> bool try_emplace_or_cvisit(key_type&& k, Args&&... args, F&& f); template<class K, class... Args, class F> bool try_emplace_or_visit(K&& k, Args&&... args, F&& f); template<class K, class... Args, class F> bool try_emplace_or_cvisit(K&& k, Args&&... args, F&& f); ```	```c++ template<class... args,="" class="" f=""> bool try_emplace_or_visit(const key_type& k, Args&&... args, F&& f); template<class... args,="" class="" f=""> bool try_emplace_or_cvisit(const key_type& k, Args&&... args, F&& f); template<class... args,="" class="" f=""> bool try_emplace_or_visit(key_type&& k, Args&&... args, F&& f); template<class... args,="" class="" f=""> bool try_emplace_or_cvisit(key_type&& k, Args&&... args, F&& f); template<class k,="" class...="" args,="" class="" f=""> bool try_emplace_or_visit(K&& k, Args&&... args, F&& f); template<class k,="" class...="" args,="" class="" f=""> bool try_emplace_or_cvisit(K&& k, Args&&... args, F&& f); ```</class></class></class...></class...></class...></class...>
	Inserts an element constructed from `k` and `args` into the table if there is no existing element with key `k` contained within it. Otherwise, invokes `f` with a reference to the equivalent element; such reference is const iff a `*_cvisit` overload is used.	若容器中不存在键为`k`的元素，则将由`k`和`args`构造的元素插入容器。否则，以等价元素的引用调用`f`；若使用`*_cvisit`重载版本，则该引用为常量引用。
:1296	Returns:;; `true` if an insert took place. + Concurrency:;; Blocking on rehashing of `*this`. Notes:;; No `value_type` is constructed if there is an element with an equivalent key; otherwise, the construction is of the form: + + -- ```c++	返回值：插入成功则返回true。并发：对当前对象*this进行重哈希时阻塞。说明：若存在等价键的元素，则不会构造value_type；否则，构造形式为：
:1304	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<Key>(k)), std::forward_as_tuple(std::forward<Args>(args)...))	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<key>(k)), std::forward_as_tuple(std::forward<args>(args)...))</args></key>
:1309	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<Args>(args)...)) ```	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<k>(k)), std::forward_as_tuple(std::forward<args>(args)...)) ```</args></k>
:1314	Invalidates pointers and references to elements if a rehashing is issued.	若执行重哈希操作，将使指向元素的指针和引用失效。
	The interface is exposition only, as C++ does not allow to declare a parameter `f` after a variadic parameter pack.	该接口仅为说明性用途，因为C++不允许在可变参数包之后声明参数`f`。
	The `template<class K, class\... Args, class F>` overloads only participate 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.	若`Hash::is_transparent`和`Pred::is_transparent`是有效的成员类型别名，则`template<class k,="" args,="" class="" f="">`重载版本才会参与重载决议。库假定`Hash`可同时接受`K`与`Key`类型的参数调用，且`Pred`是透明的。这支持异构查找，避免了实例化`Key`类型对象的开销。</class>
:1320	--	--
:1322	---	---

	English	Chinese (Simplified Han script)	Actions
	```c++ size_type max_size() const noexcept; ```	```c++ size_type max_size() const noexcept; ```
	Returns:;; `size()` of the largest possible table.	返回值：容器所能容纳的最大元素数量（最大容量）。
	Modifiers	修改器
	Inserts an object, constructed with the arguments `args`, in the table if and only if there is no element in the table with an equivalent key.	当且仅当容器中不存在等价键的元素时，才会使用参数 args 构造对象并插入到容器中。
	Requires:;; `value_type` is constructible from `args`. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + If `args...` is of the form `k,v`, it delays constructing the whole object until it is certain that an element should be inserted, using only the `k` argument to check.	要求：`value_type` 可从 `args` 构造。返回：若执行了插入则返回 `true`。并发：在 `*this` 的 rehash 操作上阻塞。注意：如果执行了 rehash，则指向元素的指针和引用会失效。+ +若 `args...` 的形式为 `k,v`，则仅在确定应插入元素时才构造整个对象，检查时仅使用 `k` 参数。
	Copy Insert	复制插入
	Synopsis	概要
	Description	描述
	Chunk size internally used in xref:concurrent_flat_map_bulk_visit[bulk visit] operations.	xref:concurrent_flat_map_bulk_visit [批量访问] 操作内部使用的块大小。
	The move constructor. The internal bucket array of `other` is transferred directly to the new table. The hash function, predicate and allocator are moved-constructed from `other`. If statistics are xref:concurrent_flat_map_boost_unordered_enable_stats[enabled], transfers the internal statistical information from `other` and calls `other.reset_stats()`.	移动构造函数。other 的内部桶数组会直接转移到新表中。哈希函数、谓词和分配器均从 other 移动构造而来。如果启用了 xref:concurrent_flat_map_boost_unordered_enable_stats [统计功能]，则从 other 转移内部统计信息，并调用 other.reset_stats()。
	Move Constructor with Allocator	带分配器的移动构造函数
	Insert Initializer List	初始化列表插入
	```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 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`。

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