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Pointers and references to transferred elements remain valid.
Pointers and references to transferred elements remain valid.指向被转移元素的指针和引用保持有效。
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Notes:;; + --
Notes:;; 说明：+ --
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This function does not copy or move any elements and instead simply relocates the nodes from `source` into `*this`.
This function does not copy or move any elements and instead simply relocates the nodes from此函数不会复制或移动任何元素，而是仅将节点从 `source` into重新定位到 `*this`. 中。
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The behavior of this function is undefined if `this\->get_allocator() != source.get_allocator()`.
The behavior of this function is undefined if `this\->get_如果 `this-++>++get++_++allocator() != source.get_++_++allocator()`. ，则此函数的行为未定义。
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Because `source` can have a different hash function and key equality predicate, the key of each node in `source` is rehashed using `this\->hash_function()` and then, if required, compared using `this\->key_eq()`.
Because由于 `source` can have a different hash function and key equality predicate, the key of each node in `source` is rehashed using `this\->hash_function()` and then, if required, compared using `this\->key_eq()`.可以有不同的哈希函数和键相等性谓词，因此会使用 `this-++>++hash++_++function()` 操作对 `source` 中每个节点的键进行重哈希，并在需要时使用 `this-++>++key++_++eq()` 进行比较。
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Attempt to "merge" two containers by iterating `source` and extracting any node in `source` that is not contained in `*this` and then inserting it into `*this`.
Attempt to "merge" two containers by iterating `source` and extracting any node in `source` that is not contained in `*this` and then inserting it into `*this`.通过遍历 `source` 容器，提取其中所有不包含在 `++*++this` 中的节点，并将其插入到 `++*++this` 中，以此尝试将两个容器"合并"。
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```c++ 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); 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); ```
```c++ template<class Hh2,="" class P2="" p2=""> void merge(unordered_set<Kkey, H2, P2, Allocator>&h2,="" p2,="" allocator="">&amp; source); template<class Hh2,="" class P2="" p2=""> void merge(unordered_set<Kkey, H2, P2, Allocator>&&h2,="" p2,="" allocator="">&amp;&amp; source); template<class Hh2,="" class P2="" p2=""> void merge(unordered_multiset<Kkey, H2, P2, Allocator>&h2,="" p2,="" allocator="">&amp; source); template<class Hh2,="" class P2="" p2=""> void merge(unordered_multiset<Kkey, H2, P2, Allocator>&& source); ```h2,="" p2,="" allocator="">&amp;&amp; source); ```</key,></class></key,></class></key,></class></key,></class>
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merge
merge合并
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---
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:1114
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Postconditions:;; `size() == 0` Throws:;; Never throws an exception.
Postconditions:;; `size() == 0` Throws:;; Never throws an exception.后置条件：`size() == 0` 抛出：永不抛出异常。
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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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---
---
:1101
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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.
Throws:;; Doesn't throw an exception unless it is thrown by the copy constructor or copy assignment operator of抛出：除非 `key_equal` or或 `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. 的复制构造函数或复制赋值运算符抛出异常，否则不会抛出异常。说明：由于相等谓词和哈希函数是通过它们的复制构造函数进行交换的，因此异常规范与 C++11 标准并不完全相同。
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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.
If如果声明了 `Allocator::propagate_on_++_++on++_++container_++_++swap` is declared and且 `Allocator::propagate_on_++_++on++_++container_++_++swap::value` is为 `true` then the containers' allocators are swapped. Otherwise, swapping with unequal allocators results in undefined behavior.，则交换容器的分配器。则，在分配器不相等的情况下进行交换将导致未定义行为。
:1095
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Swaps the contents of the container with the parameter.
Swaps the contents of the container with the parameter.交换容器与参数的内容。
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```c++ void swap(unordered_set& 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_set&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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---
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:1083
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