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Returns:;; The container's allocator.
Returns:;; The container's allocator.返回：容器的分配器。
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``` allocator_type get_allocator() const noexcept; ```
``` allocator_type get_allocator() const noexcept; ```
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get_allocator
get_allocator
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Observers
Observers观察器
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---
---
:1266
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Requires:;; `this\->get_allocator() == source.get_allocator()`. Notes:;; Invalidates iterators to the elements transferred. If the resulting size of `*this` is greater than its original maximum load, invalidates all iterators associated to `*this`.
Requires:;; `this\->要求：`this->get_allocator() == source.get_allocator()`. Notes:;; Invalidates iterators to the elements transferred. If the resulting size of `*this` is greater than its original maximum load, invalidates all iterators associated to `*this`.。
注意：会使被转移元素的迭代器失效。如果 `*this` 的结果大小大于其原始最大负载，则会使与 `*this` 关联的所有迭代器失效。
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Transfers all the element nodes from `source` whose key is not already present in `*this`.
Transfers all the element nodes from `source` whose key is not already present in `*this`.从 `source` 转移所有键在 `*this` 中尚未存在的元素节点。
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```c++ template<class H2, class P2> void merge(unordered_node_map<Key, T, H2, P2, Allocator>& source); template<class H2, class P2> void merge(unordered_node_map<Key, T, H2, P2, Allocator>&& source); ```
```c++ template<class Hh2,="" class P2="" p2=""> void merge(unordered_node_map<Kkey, T, H2, P2, Allocator>&t,="" h2,="" p2,="" allocator="">&amp; source); template<class Hh2,="" class P2="" p2=""> void merge(unordered_node_map<Kkey, T, H2, P2, Allocator>&& source); ```t,="" h2,="" p2,="" allocator="">&amp;&amp; source); ```</key,></class></key,></class>
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merge
merge合并
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---
---
:1248
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Postconditions:;; `size() == 0`, `max_load() >= max_load_factor() * bucket_count()`
Postconditions:;; 后置条件：`size() == 0`, ，`max_load() >&gt;= max_load_factor() * bucket_count()`
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Erases all elements in the container.
Erases all elements in the container.擦除容器中的所有元素。
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```c++ void clear() noexcept; ```
```c++ void clear() noexcept; ```
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clear
clear清空
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---
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:1236
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Move-constructs an `init_value` `x` from the element pointed to by `position`, erases the element and returns `x`.
Move-constructs an `init_value` `x` from the element pointed to by `position`, erases the element and returns从 `position` 指向的元素移动构造一个 `init_value` 对象 `x`，擦除该元素并返回 `x`.。
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```c++ init_type pull(const_iterator position); ```
```c++ init_type pull(const_iterator position); ```
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pull
pull
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---
---
:1226
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Returns:;; A `node_type` object holding the extracted element, or empty if no element was extracted. 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. 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:;; A `node_type` object holding the extracted element, or empty if no element was extracted. Throws:;; Only throws an exception if it is thrown by返回：一个持有被提取元素的 `node_type` 对象；如果未提取到任何元素，则返回空。
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. The library assumes that `Hash` is callable with both是有效的成员 typedef 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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