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```c++ void swap(unordered_multimap& other) 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_multimap&amp; other) noexcept(boost::allocator_traits<Aallocator>::is_always_equal::value &&amp;&amp; boost::is_nothrow_swappable_v<Hhash> &&amp;&amp; boost::is_nothrow_swappable_v<Ppred>); ```</pred></hash></allocator>
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swap
swap交换
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---
---
:1047
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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。
:1042
06/05/2026
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Erase the element pointed to by `position`.
Erase the element pointed to by `position`.擦除 position 所指向的元素。
:1039
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```c++ void erase_return_void(const_iterator position); ```
```c++ void erase_return_void(const_iterator position); ```
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erase_return_void
erase_return_void
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---
---
:1032
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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。
:1027
06/05/2026
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Erase the element pointed to by `position`.
Erase the element pointed to by擦除 `position`. 所指向的元素。
:1024
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```c++ void quick_erase(const_iterator position); ```
```c++ void quick_erase(const_iterator position); ```
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quick_erase
quick_erase
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---
---
:1017
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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.
Returns:;; The iterator following the erased elements - i.e. `last`. Throws:;; Only throws an exception if it is thrown by返回：被擦除元素之后的迭代器——即 `last`。
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. 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。
06/05/2026
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Erases the elements in the range from `first` to `last`.
Erases the elements in the range from擦除从 `first` to到 `last`. 范围内的元素。
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```c++ iterator erase(const_iterator first, const_iterator last); ```
```c++ iterator erase(const_iterator first, const_iterator last); ```
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Erase Range
Erase Range范围擦除
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---
---
:1001
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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.
Returns:;; The number of elements erased. Throws:;; Only throws an exception if it is thrown by返回：被擦除的元素数量。
抛出：仅当 `hasher` or或 `key_equal`. Notes:;; The `template<class K>` overload only participates in overload resolution if 抛出异常时才会抛出。
注意：`template<class k="">` 重载仅在 `Hash::is_transparent` and和 `Pred::is_transparent` are valid member typedefs and neither是有效的成员 typedef，且 `iterator` nor和 `const_iterator` are implicitly convertible from `K`. The library assumes that `Hash` is callable with both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` and和 `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.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>
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Erase all elements with key equivalent to `k`.
Erase all elements with key equivalent to `k`.擦除所有键与 `k` 等价的元素。
06/05/2026

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