Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Unordered Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: Changes the number of buckets so that there are at …

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Key	English	Chinese (Simplified Han script)
	Hash Policy	哈希策略
	load_factor	负载因子
	```c++ float load_factor() const noexcept; ```	```c++ float load_factor() const noexcept; ```
	Returns:;; The average number of elements per bucket.	返回：;; 每个桶的平均元素个数。
:1600	---	---
	max_load_factor	max_load_factor
	```c++ float max_load_factor() const noexcept; ```	```c++ float max_load_factor() const noexcept; ```
	Returns:;; Returns the current maximum load factor.	返回：;; 返回当前的最大负载因子。
:1611	---	---
	Set max_load_factor	设置最大负载因子
	```c++ void max_load_factor(float z); ```	```c++ void max_load_factor(float z); ```
	Effects:;; Changes the container's maximum load factor, using `z` as a hint.	效果：;; 改变容器的最大负载因子，以 `z` 作为提示。
:1621	---	---
	rehash	重哈希
	```c++ void rehash(size_type n); ```	```c++ void rehash(size_type n); ```
	Changes the number of buckets so that there are at least `n` buckets, and so that the load factor is less than or equal to the maximum load factor. When applicable, this will either grow or shrink the `bucket_count()` associated with the container.	改变桶的数量，使得至少包含 `n` 个桶，并且使得负载因子小于或等于最大负载因子。在适用的情况下，这将增大或缩小与容器相关联的 `bucket_count()`。
	When `size() == 0`, `rehash(0)` will deallocate the underlying buckets array.	当 `size() == 0` 时，`rehash(0)` 将释放底层桶数组的内存。
:1633	Invalidates iterators, and changes the order of elements. Pointers and references to elements are not invalidated.	使迭代器失效，并改变元素的顺序。指向元素的指针和引用不会失效。
:1636	Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.	抛出：;; 如果抛出异常（除非是由容器的哈希函数或比较函数抛出），则该函数无效。
:1638	---	---
	reserve	保留
	```c++ void reserve(size_type n); ```	```c++ void reserve(size_type n); ```
	Equivalent to `a.rehash(ceil(n / a.max_load_factor()))`, or `a.rehash(1)` if `n > 0` and `a.max_load_factor() == std::numeric_limits<float>::infinity()`.	等价于 `a.rehash(ceil(n / a.max_load_factor()))`；如果 `n > 0` 且 `a.max_load_factor() == std::numeric_limits<float>::infinity()`，则等价于 `a.rehash(1)`。</float>
	Similar to `rehash`, this function can be used to grow or shrink the number of buckets in the container.	与 `rehash` 类似，此函数可用于增加或减少容器中桶的数量。
:1649	Invalidates iterators, and changes the order of elements. Pointers and references to elements are not invalidated.	使迭代器失效，并改变元素的顺序。指向元素的指针和引用不会失效。
:1652	Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.	抛出：;; 如果抛出异常（除非是由容器的哈希函数或比较函数抛出），则该函数无效。
	Deduction Guides	推导指引
	A deduction guide will not participate in overload resolution if any of the following are true:	在以下任一条件成立时，推导指引将不参与重载决议：
	- It has an `InputIterator` template parameter and a type that does not qualify as an input iterator is deduced for that parameter. - It has an `Allocator` template parameter and a type that does not qualify as an allocator is deduced for that parameter. - It has a `Hash` template parameter and an integral type or a type that qualifies as an allocator is deduced for that parameter. - It has a `Pred` template parameter and a type that qualifies as an allocator is deduced for that parameter.	- 它具有 `InputIterator` 模板参数，并且为该参数推导出的类型不符合输入迭代器的要求。 - 它具有 `Allocator` 模板参数，并且为该参数推导出的类型不符合分配器的要求。 - 它具有 `Hash` 模板参数，并且为该参数推导出的是整数类型或符合分配器要求的类型。 - 它具有 `Pred` 模板参数，并且为该参数推导出的是符合分配器要求的类型。
	A `size_type` parameter type in a deduction guide refers to the `size_type` member type of the container type deduced by the deduction guide. Its default value coincides with the default value of the constructor selected.	推导指引中的 `size_type` 参数类型指向由该推导指引所推导出的容器类型的 `size_type` 成员类型。其默认值与所选构造函数的默认值一致。
	__iter-value-type__	_iter-value-type_

	English	Chinese (Simplified Han script)	Actions
	An iterator whose value type is `value_type`.	一个迭代器，其值类型为 `value_type`。
	A constant iterator with the same value type, difference type and pointer and reference type as const_iterator.	一种常量迭代器，其值类型、差值类型以及指针和引用类型均与 const_iterator 相同。
	A class for holding extracted container elements, modelling https://en.cppreference.com/w/cpp/container/node_handle[NodeHandle].	一个用于存放被提取容器元素的类，符合 https://en.cppreference.com/w/cpp/container/node_handle[NodeHandle] 模型。
	with `Iterator` = `iterator` and `NodeType` = `node_type`.	其中 `Iterator` = `iterator`，`NodeType` = `node_type`。
	Constructors	构造函数
	Default Constructor	默认构造函数
	```c++ unordered_map(); ```	```c++ unordered_map(); ```
	```c++ explicit unordered_map(Allocator const& a); ```	```c++ explicit unordered_map(Allocator const& a); ```
	```c++ float load_factor() const noexcept; ```	```c++ float load_factor() const noexcept; ```
	Returns:;; The average number of elements per bucket.	返回：;; 每个桶的平均元素个数。
	max_load_factor	max_load_factor
	```c++ float max_load_factor() const noexcept; ```	```c++ float max_load_factor() const noexcept; ```
	Returns:;; Returns the current maximum load factor.	返回：;; 返回当前的最大负载因子。
	rehash	重哈希
	```c++ void rehash(size_type n); ```	```c++ void rehash(size_type n); ```
	Changes the number of buckets so that there are at least `n` buckets, and so that the load factor is less than or equal to the maximum load factor. When applicable, this will either grow or shrink the `bucket_count()` associated with the container.	改变桶的数量，使得至少包含 `n` 个桶，并且使得负载因子小于或等于最大负载因子。在适用的情况下，这将增大或缩小与容器相关联的 `bucket_count()`。
	When `size() == 0`, `rehash(0)` will deallocate the underlying buckets array.	当 `size() == 0` 时，`rehash(0)` 将释放底层桶数组的内存。
	reserve	保留
	operator	operator
	Return `true` if `x.size() == y.size()` and for every element in `x`, there is an element in `y` with the same key, with an equal value (using `operator==` to compare the value types).	如果 `x.size() == y.size()` 并且对于 `x` 中的每个元素，在 `y` 中都有一个具有相同键且值相等的元素（使用 `operator==` 比较值类型），则返回 `true`。
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate, `a` as the allocator and a maximum load factor of `1.0` and inserts the elements from `il` into it.	构造一个至少包含 n 个桶的空容器，使用 hf 作为哈希函数，eql 作为键相等谓词，a 作为分配器，以及最大负载因子 1.0，并将 il 中的元素插入其中。
	Bucket Count Constructor with Hasher and Allocator	带哈希函数和分配器的桶数构造函数
	```c++ unordered_map(size_type n, hasher const& hf, allocator_type const& a); ```	```c++ unordered_map(size_type n, hasher const& hf, allocator_type const& a); ```
	An allocator whose value type is the same as the container's value type.	一种分配器，其值类型与容器的值类型相同。
	Allocators using https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[fancy pointers] are supported.	支持使https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[异形指针] 的分配器。
	A const_local_iterator object can be used to iterate through a single bucket.	`const_local_iterator` 对象可用于遍历单个桶。
	Constructs an empty container using `hasher()` as the hash function, `key_equal()` as the key equality predicate, `allocator_type()` as the allocator and a maximum load factor of `1.0`.	使用 `hasher()` 作为哈希函数，`key_equal()` 作为键相等谓词，`allocator_type()` 作为分配器，以及最大负载因子 `1.0` 构造一个空容器。
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate, `a` as the allocator and a maximum load factor of `1.0`.	构造一个至少包含 `n` 个桶的空容器，使用 `hf` 作为哈希函数，`eql` 作为键相等谓词，`a` 作为分配器，以及最大负载因子 `1.0`。
	Iterator Range Constructor	迭代器范围构造函数
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate, `a` as the allocator and a maximum load factor of `1.0` and inserts the elements from `[f, l)` into it.	构造一个至少包含 `n` 个桶的空容器，使用 `hf` 作为哈希函数，`eql` 作为键相等谓词，`a` 作为分配器，以及最大负载因子 `1.0`，并将 `[f, l)` 范围内的元素插入其中。

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Chinese (Simplified Han script) 226 characters editedCurrent translationState: Translated

Changes the number of buckets so that there are at least `n` buckets, and so that the load factor is less than or equal to the maximum load factor. When applicable, this will either grow or shrink the `bucket_count()` associated with the container.改变桶的数量，使得至少包含 `n` 个桶，并且使得负载因子小于或等于最大负载因子。在适用的情况下，这将增大或缩小与容器相关联的 `bucket_count()`。

06/05/2026

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Chinese (Simplified Han script) 248 characters editedPrevious translationState: Needs editing (Needs rewriting)

06/05/2026

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