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:1226
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max_bucket_count
max_bucket_count
```c++ size_type max_bucket_count() const noexcept; ```
```c++ size_type max_bucket_count() const noexcept; ```
Returns:;; An upper bound on the number of buckets.
返回：桶数量的上界。
:1189
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bucket_size
桶大小
```c++ size_type bucket_size(size_type n) const; ```
```c++ size_type bucket_size(size_type n) const; ```
Requires:;; `n < bucket_count()` Returns:;; The number of elements in bucket `n`.
Requires:;; `n &lt; bucket_count()` Returns:;; The number of elements in bucket `n`.
:1200
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bucket
桶
```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&amp; k) const; template<class k=""> size_type bucket(const K&amp; k) const; ```</class>
Returns:;; The index of the bucket which would contain an element with key `k`. Postconditions:;; The return value is less than `bucket_count()`. Notes:;; The `template<class K>` 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.
返回：将包含键为 `k` 的元素的桶的索引。
后置条件：返回值小于 `bucket_count()`。
注意：`template<class k="">` 重载仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时参与重载决议。库假定 `Hash` 可同时使用 `K` 和 `Key` 调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型对象的开销。</class>
:1213
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:1215
begin
开始
```c++ local_iterator begin(size_type n); const_local_iterator begin(size_type n) const; ```
```c++ local_iterator begin(size_type n); const_local_iterator begin(size_type n) const; ```
Requires:;; `n` shall be in the range `[0, bucket_count())`. Returns:;; A local iterator pointing the first element in the bucket with index `n`.
要求：`n` 必须在 `[0, bucket_count())` 范围内。
返回：指向索引为 `n` 的桶中第一个元素的局部迭代器。
:1226
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:1228
end
结束
```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; ```
Requires:;; `n` shall be in the range `[0, bucket_count())`. Returns:;; A local iterator pointing the 'one past the end' element in the bucket with index `n`.
要求：`n` 必须在 `[0, bucket_count())` 范围内。
返回：指向索引为 `n` 的桶中“尾后”元素的局部迭代器。
:1238
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:1240
cbegin
cbegin
```c++ const_local_iterator cbegin(size_type n) const; ```
```c++ const_local_iterator cbegin(size_type n) const; ```
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` 必须在 `[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。
:1249
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:1251
cend
cend
```c++ const_local_iterator cend(size_type n) const; ```
```c++ const_local_iterator cend(size_type n) const; ```
Requires:;; `n` shall be in the range `[0, bucket_count())`. Returns:;; A constant local iterator pointing the 'one past the end' element in the bucket with index `n`.
要求：`n` 必须在 `[0, bucket_count())` 范围内。
返回：指向索引为 `n` 的桶中“尾后”元素的常量局部迭代器。
:1260
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Hash Policy
哈希策略
load_factor
负载因子
```c++ float load_factor() const noexcept; ```
```c++ float load_factor() const noexcept; ```

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:1226
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Key
:1226
Flags
safe-html, strict-same
Unit identifier
54870
Source string location
:1226
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_multiset_zh_Hans.adoc, string 335