Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Concurrent Flat Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: Inserts an object, constructed with the arguments `args`, in the …

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Key	English	Chinese (Simplified Han script)
	```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。
:933	---	---
	max_size	max_size
	```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）。
:944	---	---
	Modifiers	修改器
	emplace	原地构造
	```c++ template<class... Args> bool emplace(Args&&... args); ```	```c++ template<class... args=""> bool emplace(Args&&... args); ```</class...>
	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。
:963	---	---
	Copy Insert	复制插入
	```c++ bool insert(const value_type& obj); bool insert(const init_type& obj); ```	```c++ bool insert(const value_type& obj); bool insert(const init_type& obj); ```
:971	Inserts `obj` 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，才将对象 obj 插入到容器中。
	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`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + A call of the form `insert(x)`, where `x` is equally convertible to both `const value_type&` and `const init_type&`, is not ambiguous and selects the `init_type` overload.	要求：`value_type` 需满足 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[可复制插入^] 要求。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。+ +形式为 `insert(x)` 的调用（其中 `x` 可同等转换为 `const value_type&` 和 `const init_type&`）不会产生歧义，并且会选择 `init_type` 重载。
:981	---	---
	Move Insert	移动插入
	```c++ bool insert(value_type&& obj); bool insert(init_type&& obj); ```	```c++ bool insert(value_type&& obj); bool insert(init_type&& obj); ```
:989	Inserts `obj` in the table if and only if there is no element in the table with an equivalent key.	当且仅当容器中无等价键的元素时，将对象 obj 插入容器。
	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`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + A call of the form `insert(x)`, where `x` is equally convertible to both `value_type&&` and `init_type&&`, is not ambiguous and selects the `init_type` overload.	要求：`value_type` 需满足 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[可移动插入^] 要求。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。+ +形式为 `insert(x)` 的调用（其中 `x` 可同等转换为 `value_type&&` 和 `init_type&&`）不会产生歧义，并且会选择 `init_type` 重载。
:999	---	---
	Insert Iterator Range	迭代器范围插入
	```c++ template<class InputIterator> size_type insert(InputIterator first, InputIterator last); ```	```c++ template<class inputiterator=""> size_type insert(InputIterator first, InputIterator last); ```</class>
:1006	Equivalent to [listing,subs="+macros,+quotes"]	等效于 [listing,subs="+macros,+quotes"]

	English	Chinese (Simplified Han script)	Actions
	Move Assignment	移动赋值
	A unary function object type that acts a hash function for a `Key`. It takes a single argument of type `Key` and returns a value of type `std::size_t`.	一种一元函数对象类型，用作Key类型的哈希函数。它接受单个Key类型的参数，并返回std::size_t类型的值。
	_Pred_	_Pred_
	Non-mutable modification of the element.	对元素的非可变修改。
	```c++ concurrent_flat_map(concurrent_flat_map&& other, Allocator const& a); ```	```c++ concurrent_flat_map(concurrent_flat_map&& other, Allocator const& a); ```
	reserve	保留
	Mutable modification of the element:	对元素的可变修改：
	```c++ [[nodiscard]] bool empty() const noexcept; ```	```c++ [[nodiscard]] bool empty() const noexcept; ```
	```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。
	max_size	max_size
	```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：

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Chinese (Simplified Han script) 136 characters editedCurrent translationState: Translated

06/05/2026

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