Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Unordered Set (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; The …

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Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; The bool component of the return type is true if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent value. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.

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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：`size() == 0`
:701	---	---
	size	大小
	```c++ size_type size() const noexcept; ```	```c++ size_type size() const noexcept; ```
	Returns:;; `std::distance(begin(), end())`	返回：`std::distance(begin(), end())`
:712	---	---
	max_size	max_size
	```c++ size_type max_size() const noexcept; ```	```c++ size_type max_size() const noexcept; ```
	Returns:;; `size()` of the largest possible container.	返回：可能的最大容器的 `size()`。
:723	---	---
	Modifiers	修改器
	emplace	原地构造
	```c++ template<class... Args> std::pair<iterator, bool> emplace(Args&&... args); ```	```c++ template<class... args=""> std::pair<iterator, bool=""> emplace(Args&&... args); ```</iterator,></class...>
:732	Inserts an object, constructed with the arguments `args`, in the container if and only if there is no element in the container with an equivalent value.	当且仅当容器中没有等价值的元素时，插入一个使用参数 `args` 构造的对象。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; The bool component of the return type is true if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent value. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	要求：`value_type` 需从 `args` 处满足对 `X` 的 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^] 要求。返回：若执行了插入，则返回类型中的布尔分量为 `true`。+ + 若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ + 指向元素的指针和引用永远不会失效。
:744	---	---
	emplace_hint	emplace_hint
	```c++ template<class... Args> iterator emplace_hint(const_iterator position, Args&&... args); ```	```c++ template<class... args=""> iterator emplace_hint(const_iterator position, Args&&... args); ```</class...>
:751	Inserts an object, constructed with the arguments `args`, in the container if and only if there is no element in the container with an equivalent value.	当且仅当容器中没有等价值的元素时，插入一个使用参数 `args` 构造的对象。
	`position` is a suggestion to where the element should be inserted.	`position` 是一个关于元素应插入位置的提示。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key. + + Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	要求：`value_type` 需从 `args` 处满足对 `X` 的 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^] 要求。返回：若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：标准对提示的含义表述相当模糊。但使用它的唯一实际方式，也是 Boost.Unordered 唯一支持的方式，是将其指向具有相同键的现有元素。+ +可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ +指向元素的指针和引用永远不会失效。
:765	---	---
	Copy Insert	复制插入
	```c++ std::pair<iterator, bool> insert(const value_type& obj); ```	```c++ std::pair<iterator, bool=""> insert(const value_type& obj); ```</iterator,>
:772	Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中不存在等价键时，将 `obj` 对象插入到容器中。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; The bool component of the return type is true if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	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，则返回类型中的布尔分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ +指向元素的指针和引用永远不会失效。
:784	---	---
	Move Insert	移动插入
	```c++ std::pair<iterator, bool> insert(value_type&& obj); ```	```c++ std::pair<iterator, bool=""> insert(value_type&& obj); ```</iterator,>
:791	Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中不存在等价键时，将 `obj` 对象插入到容器中。

	English	Chinese (Simplified Han script)	Actions
	Requires:;; `n < bucket_count()` Returns:;; The number of elements in bucket `n`.	要求：`n < bucket_count()` 返回：桶 `n` 中的元素数量。
	```c++ size_type bucket(const key_type& k) const; template<class K> size_type bucket(const K& k) const; ```	```c++ size_type bucket(const key_type& k) const; template<class k=""> size_type bucket(const K& k) const; ```</class>
	```c++ local_iterator end(size_type n); const_local_iterator end(size_type n) const; ```	```c++ local_iterator end(size_type n); const_local_iterator end(size_type n) const; ```
	reserve	保留
	Requires:;; `n` shall be in the range `[0, bucket_count())`. Returns:;; A constant local iterator pointing the first element in the bucket with index `n`.	要求：`n` 应在 `[0, bucket_count())` 范围内。返回：指向索引为 `n` 的桶中第一个元素的常量局部迭代器。
	The copy constructor. Copies the contained elements, hash function, predicate, maximum load factor and allocator.	复制构造函数。复制所含元素、哈希函数、谓词、最大负载因子和分配器。
	Move Constructor	移动构造函数
	```c++ unordered_set(unordered_set&& other); ```	```c++ unordered_set(unordered_set&& other); ```
	The move constructor.	移动构造函数。
	Constructs an empty container using `a` as the allocator, with the default hash function and key equality predicate and a maximum load factor of `1.0` and inserts the elements from `[f, l)` into it.	构造一个空容器，使用 `a` 作为分配器、默认的哈希函数和键相等性谓词，并将最大负载因子设为 `1.0` ，然后将 `[f, l)` 范围内的元素插入其中。
	```c++ unordered_set(const unordered_set& other, const Allocator& a); ```	```c++ unordered_set(const unordered_set& other, const Allocator& a); ```
	Initializer List Constructor	初始化列表构造函数
	Postconditions:;; `size() == 0` Requires:;; `hasher` and `key_equal` need to be https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].	后置条件：`size() == 0` 要求：`hasher` 和 `key_equal` 需满足 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[可默认构造^]要求。
	Postconditions:;; `size() == 0` Requires:;; `key_equal` needs to be https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].	后置条件：size() == 0 要求：key_equal 需满足 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[可默认构造^]要求。
	```c++ unordered_set& operator=(unordered_set&& other) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value && boost::is_nothrow_move_assignable_v<Hash> && boost::is_nothrow_move_assignable_v<Pred>); ``` The move assignment operator.	```c++ unordered_set& operator=(unordered_set&& other) noexcept(boost::allocator_traits<allocator>::is_always_equal::value && boost::is_nothrow_move_assignable_v<hash> && boost::is_nothrow_move_assignable_v<pred>); ``` 移动赋值运算符。</pred></hash></allocator>
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; The bool component of the return type is true if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent value. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	要求：`value_type` 需从 `args` 处满足对 `X` 的 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^] 要求。返回：若执行了插入，则返回类型中的布尔分量为 `true`。+ + 若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ + 指向元素的指针和引用永远不会失效。
	emplace_hint	emplace_hint
	```c++ template<class... Args> iterator emplace_hint(const_iterator position, Args&&... args); ```	```c++ template<class... args=""> iterator emplace_hint(const_iterator position, Args&&... args); ```</class...>
	`position` is a suggestion to where the element should be inserted.	`position` 是一个关于元素应插入位置的提示。
	```c++ std::pair<iterator, bool> insert(const value_type& obj); ```	```c++ std::pair<iterator, bool=""> insert(const value_type& obj); ```</iterator,>
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; The bool component of the return type is true if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	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，则返回类型中的布尔分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ +指向元素的指针和引用永远不会失效。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. Returns:;; The bool component of the return type is true if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	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，则返回类型中的布尔分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ +指向元素的指针和引用永远不会失效。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key. + + Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	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，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：标准对提示的含义表述相当模糊。但使用它的唯一实际方式，也是 Boost.Unordered 唯一支持的方式，是将其指向具有相同键的现有元素。+ +可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ +指向元素的指针和引用永远不会失效。
	Insert Iterator Range	迭代器范围插入
	```c++ template<class InputIterator> void insert(InputIterator first, InputIterator last); ```	```c++ template<class inputiterator=""> void insert(InputIterator first, InputIterator last); ```</class>
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `*first`. Throws:;; When inserting a single element, if an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	要求：`value_type` 需从 `*first` 处满足对 `X` 的 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^] 要求。抛出：当插入单个元素时，若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ +指向元素的指针和引用永远不会失效。
	```c++ node_type extract(const_iterator position); ```	```c++ node_type extract(const_iterator position); ```
	Removes the element pointed to by `position`.	移除由 `position` 指向的元素。
	Returns:;; A `node_type` owning the element. Notes:;; In C++17 a node extracted using this method can be inserted into a compatible `unordered_multiset`, but that is not supported yet.	返回：一个拥有该元素的 `node_type`。说明：在 C++17 中，通过此方法提取的节点可以插入到兼容的 `unordered_multiset` 中，但该功能尚未支持。
	```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>

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Chinese (Simplified Han script) 581 characters editedCurrent translationState: Translated

~~Requires:;;~~ 要求：`value_type` is需从 `args` 处满足对 `X` 的 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; The bool component of the return type is true if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent value. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.可原位构造^] 要求。返回：若执行了插入，则返回类型中的布尔分量为 `true`。+ + 若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ + 指向元素的指针和引用永远不会失效。

06/05/2026

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Chinese (Simplified Han script) 671 characters editedPrevious translationState: Needs editing (Needs rewriting)

06/05/2026

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