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:999
English
Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated.
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Key English Chinese (Simplified Han script) Actions
Returns:;; The number of elements erased. Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. Notes:;; The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs and neither `iterator` nor `const_iterator` are implicitly convertible from `K`. 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：被擦除的元素数量。
抛出：仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。
注意：`template<class k="">` 重载仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef，且 `iterator` 和 `const_iterator` 都不能从 `K` 隐式转换时参与重载决议。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>
:958
---
---
Erase Range
范围擦除
```c++ iterator erase(const_iterator first, const_iterator last); ```
```c++ iterator erase(const_iterator first, const_iterator last); ```
Erases the elements in the range from `first` to `last`.
擦除从 `first` 到 `last` 范围内的元素。
Returns:;; The iterator following the erased elements - i.e. `last`. Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations.
返回：被擦除元素之后的迭代器——即 `last`。
抛出：仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。
在此实现中，此重载不会调用任何函数对象的方法，因此不会抛出异常，但这在其他实现中可能并不成立。
:974
---
---
quick_erase
quick_erase
```c++ void quick_erase(const_iterator position); ```
```c++ void quick_erase(const_iterator position); ```
:981
Erase the element pointed to by `position`.
擦除 `position` 所指向的元素。
:984
Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated.
抛出：仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。
在此实现中，此重载不会调用任何函数对象的方法，因此不会抛出异常，但这在其他实现中可能并不成立。
注意：引入此方法是因为从 `erase` 返回指向下一个元素的迭代器成本较高，但容器已经过重新设计，不再存在这种情况。因此，此方法现已弃用。
:989
---
---
erase_return_void
erase_return_void
```c++ void erase_return_void(const_iterator position); ```
```c++ void erase_return_void(const_iterator position); ```
:996
Erase the element pointed to by `position`.
擦除 `position` 所指向的元素。
:999
Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated.
抛出：仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。
在此实现中，此重载不会调用任何函数对象的方法，因此不会抛出异常，但这在其他实现中可能并不成立。
注意：引入此方法是因为从 `erase` 返回指向下一个元素的迭代器成本较高，但容器已经过重新设计，不再存在这种情况。因此，此方法现已弃用。
:1004
---
---
swap
交换
```c++ void swap(unordered_multiset&) noexcept(boost::allocator_traits<Allocator>::is_always_equal::value && boost::is_nothrow_swappable_v<Hash> && boost::is_nothrow_swappable_v<Pred>); ```
```c++ void swap(unordered_multiset&amp;) noexcept(boost::allocator_traits<allocator>::is_always_equal::value &amp;&amp; boost::is_nothrow_swappable_v<hash> &amp;&amp; boost::is_nothrow_swappable_v<pred>); ```</pred></hash></allocator>
Swaps the contents of the container with the parameter.
交换容器的内容与参数的内容。
:1016
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` 被声明且 `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。
Throws:;; Doesn't throw an exception unless it is thrown by the copy constructor or copy assignment operator of `key_equal` or `hasher`. Notes:;; The exception specifications aren't quite the same as the C++11 standard, as the equality predicate and hash function are swapped using their copy constructors.
抛出：除非 `key_equal` 或 `hasher` 的拷贝构造函数或拷贝赋值运算符抛出异常，否则不抛出任何异常。
注意：异常规范与 C++11 标准不完全相同，因为相等谓词和哈希函数是使用其拷贝构造函数进行交换的。
:1022
---
---
clear
清空
```c++ void clear() noexcept; ```
```c++ void clear() noexcept; ```
Erases all elements in the container.
擦除容器中的所有元素。
Postconditions:;; `size() == 0` Throws:;; Never throws an exception.
后置条件：`size() == 0` 抛出：永不抛出异常。
:1035
---
---
merge
合并
```c++ template<class H2, class P2> void merge(unordered_multiset<Key, H2, P2, Allocator>& source); template<class H2, class P2> void merge(unordered_multiset<Key, H2, P2, Allocator>&& source); template<class H2, class P2> void merge(unordered_set<Key, H2, P2, Allocator>& source); template<class H2, class P2> void merge(unordered_set<Key, H2, P2, Allocator>&& source); ```
```c++ template<class h2,="" class="" p2=""> void merge(unordered_multiset<key, h2,="" p2,="" allocator="">&amp; source); template<class h2,="" class="" p2=""> void merge(unordered_multiset<key, h2,="" p2,="" allocator="">&amp;&amp; source); template<class h2,="" class="" p2=""> void merge(unordered_set<key, h2,="" p2,="" allocator="">&amp; source); template<class h2,="" class="" p2=""> void merge(unordered_set<key, h2,="" p2,="" allocator="">&amp;&amp; source); ```</key,></class></key,></class></key,></class></key,></class>
Attempt to "merge" two containers by iterating `source` and extracting all nodes in `source` and inserting them into `*this`.
尝试“合并”两个容器：遍历 `source`，提取 `source` 中的所有节点，并将它们插入到 `*this` 中。
Key English Chinese (Simplified Han script) Actions
:884
If `nh` is empty, has no effect.
如果 `nh` 为空，则无效果。
:886
Otherwise inserts the element owned by `nh`.
否则，插入 `nh` 所拥有的元素。
:900
---
---
:907
If `nh` is empty, has no effect.
如果 `nh` 为空，则无效果。
:909
Otherwise inserts the element owned by `nh`.
否则，插入 `nh` 所拥有的元素。
:911
`hint` is a suggestion to where the element should be inserted.
`hint` 是关于元素插入位置的建议。
:927
---
---
:936
Erase the element pointed to by `position`.
擦除 `position` 所指向的元素。
:943
---
---
:958
---
---
:974
---
---
:981
Erase the element pointed to by `position`.
擦除 `position` 所指向的元素。
:984
Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated.
抛出：仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。
在此实现中，此重载不会调用任何函数对象的方法，因此不会抛出异常，但这在其他实现中可能并不成立。
注意：引入此方法是因为从 `erase` 返回指向下一个元素的迭代器成本较高，但容器已经过重新设计，不再存在这种情况。因此，此方法现已弃用。
:989
---
---
:996
Erase the element pointed to by `position`.
擦除 `position` 所指向的元素。
:999
Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated.
抛出：仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。
在此实现中，此重载不会调用任何函数对象的方法，因此不会抛出异常，但这在其他实现中可能并不成立。
注意：引入此方法是因为从 `erase` 返回指向下一个元素的迭代器成本较高，但容器已经过重新设计，不再存在这种情况。因此，此方法现已弃用。

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Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated.
Throws:;; Only throws an exception if it is thrown by抛出：仅当 `hasher` or或 `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated. 抛出异常时才会抛出。
在此实现中，此重载不会调用任何函数对象的方法，因此不会抛出异常，但这在其他实现中可能并不成立。
注意：引入此方法是因为从 `erase` 返回指向下一个元素的迭代器成本较高，但容器已经过重新设计，不再存在这种情况。因此，此方法现已弃用。
:999
06/05/2026
User avatar admin

String added in the repository
Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated.
Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated.
:999
06/05/2026
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English Chinese (Simplified Han script)
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String information

Key
:999
Flags
safe-html, strict-same
Unit identifier
54795
Source string location
:999
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 260