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:1403
English
Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.
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Key English Chinese (Simplified Han script) Actions
```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：使用 `z` 作为提示，更改容器的最大负载因子。
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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，使其至少为 `n` 个，并确保负载因子小于或等于最大负载因子。此操作将根据情况增加或减少容器关联的 `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。
:1384
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。
:1387
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：若抛出异常（除非由容器的哈希函数或比较函数抛出），则该函数无效果。
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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()))`，若 `n &gt; 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，该函数可用于增加或减少容器中的桶数量。
:1400
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。
:1403
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：若抛出异常（除非由容器的哈希函数或比较函数抛出），则该函数无效果。
Deduction Guides
推导指引
A deduction guide will not participate in overload resolution if any of the following are true:
如果以下任何一条件为真，则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.
- 该推导指引包含 `InputIterator` 模板参数，且为此参数推导出的类型不符合输入迭代器的要求。 - 该推导指引包含 `Allocator` 模板参数，且为该参数推导出的类型不符合分配器要求。 - 该推导指引包含 `Hash` 模板参数，且为该参数推导出的类型为整型或符合分配器要求。 - 该推导指引包含 `Pred` 模板参数，且为该参数推导出的类型符合分配器要求。
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__
Equality Comparisons
相等性比较
operator
operator
```c++ template<class Key, class Hash, class Pred, class Alloc> bool operator==(const unordered_set<Key, Hash, Pred, Alloc>& x, const unordered_set<Key, Hash, Pred, Alloc>& y); ```
```c++ template<class key,="" class="" hash,="" pred,="" alloc=""> bool operator==(const unordered_set<key, hash,="" pred,="" alloc="">&amp; x, const unordered_set<key, hash,="" pred,="" alloc="">&amp; y); ```</key,></key,></class>
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()` 且对于 `x` 中的每个元素，在 `y` 中均存在一个具有相同键且值相等（使用 `operator==` 比较值类型）的元素，则返回 `true`。
:1438
Notes:;; Behavior is undefined if the two containers don't have equivalent equality predicates.
说明：如果两个容器的相等谓词不等价，则行为未定义。
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operator!
operator!
```c++ template<class Key, class Hash, class Pred, class Alloc> bool operator!=(const unordered_set<Key, Hash, Pred, Alloc>& x, const unordered_set<Key, Hash, Pred, Alloc>& y); ```
```c++ template<class key,="" class="" hash,="" pred,="" alloc=""> bool operator!=(const unordered_set<key, hash,="" pred,="" alloc="">&amp; x, const unordered_set<key, hash,="" pred,="" alloc="">&amp; y); ```</key,></key,></class>
Return `false` 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()` 且对于 `x` 中的每个元素，在 `y` 中均存在一个具有相同键且值相等（使用 `operator==` 比较值类型）的元素，则返回 `false`。
:1452
Notes:;; Behavior is undefined if the two containers don't have equivalent equality predicates.
注意：如果两个容器的相等谓词不等价，则行为未定义。
Key English Chinese (Simplified Han script) Actions
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begin
begin
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end
end
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cbegin
cbegin
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cend
cend
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:1384
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。
:1387
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：若抛出异常（除非由容器的哈希函数或比较函数抛出），则该函数无效果。
:1389
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:1400
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。
:1403
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：若抛出异常（除非由容器的哈希函数或比较函数抛出），则该函数无效果。
:1438
Notes:;; Behavior is undefined if the two containers don't have equivalent equality predicates.
说明：如果两个容器的相等谓词不等价，则行为未定义。
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:1452
Notes:;; Behavior is undefined if the two containers don't have equivalent equality predicates.
注意：如果两个容器的相等谓词不等价，则行为未定义。
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:1466
If `Allocator::propagate_on_container_swap` is declared and `Allocator::propagate_on_container_swap::value` is `true` then the containers' allocators are swapped. Otherwise, swapping with unequal allocators results in undefined behavior.
如果 `Allocator::propagate_on_container_swap` 已声明且 `Allocator::propagate_on_container_swap::value` 为 `true`，则交换容器的分配器。否则，使用不相等的分配器进行交换将导致未定义行为。
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A constant iterator whose value type is `value_type`.
一个常量迭代器，其值类型为 `value_type`。
:283
The iterator category is at least a forward iterator.
迭代器类别至少为前向迭代器。
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---
---
:294
A constant iterator whose value type is `value_type`.
一个常量迭代器，其值类型为 `value_type`。

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Translation uploaded
Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.
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：若抛出异常（除非由容器的哈希函数或比较函数抛出），则该函数无效果。
:1403
06/05/2026
User avatar admin

String added in the repository
Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.
Throws:;; The function has no effect if an exception is thrown, unless it is thrown by the container's hash function or comparison function.
:1403
06/05/2026
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Glossary

English Chinese (Simplified Han script)
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String information

Key
:1403
Flags
safe-html, strict-same
Unit identifier
51222
Source string location
:1403
String age
06/05/2026
Last updated
06/06/2026
Source string age
06/05/2026
Translation file AsciiDoc file
doc/modules/ROOT/pages/reference/unordered_set_zh_Hans.adoc, string 387