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Copy Insert
Copy Insert复制插入
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---
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:770
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Requires:;; `value_type` is constructible from `args`. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load. +
Requires:;; 要求：`value_type` is constructible from `args`. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load. +可从 `args` 构造。
返回：返回类型的 `bool` 分量为 `true` 表示发生了插入。
如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。
抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。
注意：可能使迭代器失效，但仅当插入导致负载大于最大负载时才会发生。
:763
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`position` is a suggestion to where the element should be inserted. This implementation ignores it.
`position` is a suggestion to where the element should be inserted. This implementation ignores it.是关于元素插入位置的建议。此实现会忽略该建议。
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Inserts an object, constructed with the arguments `args`, in the container if and only if there is no element in the container with an equivalent key.
Inserts an object, constructed with the arguments `args`, in the container if and only if there is no element in the container with an equivalent key.当且仅当容器中没有具有等价键的元素时，才插入一个使用参数 `args` 构造的对象。
:758
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```c++ template<class... Args> iterator emplace_hint(const_iterator position, Args&&... args); ```
```c++ template<class... Aargs=""> iterator emplace_hint(const_iterator position, Args&&amp;&amp;... args); ```</class...>
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emplace_hint
emplace_hint
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---
---
:751
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Requires:;; `value_type` is constructible from `args`. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load. +
Requires:;; 要求：`value_type` is constructible from `args`. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load. +可从 `args` 构造。
返回：返回类型的 `bool` 分量为 `true` 表示发生了插入。
如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。
抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。
注意：可能使迭代器失效，但仅当插入导致负载大于最大负载时才会发生。
:744
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Inserts an object, constructed with the arguments `args`, in the container if and only if there is no element in the container with an equivalent key.
Inserts an object, constructed with the arguments `args`, in the container if and only if there is no element in the container with an equivalent key.当且仅当容器中没有具有等价键的元素时，才插入一个使用参数 `args` 构造的对象。
:741
06/05/2026
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```c++ template<class... Args> std::pair<iterator, bool> emplace(Args&&... args); ```
```c++ template<class... Aargs=""> std::pair<iterator, bool=""> emplace(Args&&amp;&amp;... args); ```</iterator,></class...>
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emplace
emplace原地构造
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Modifiers
Modifiers修改器
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---
---
:732
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Returns:;; `size()` of the largest possible container.
Returns:;; `size()` of the largest possible container.返回：;; 可能的最大容器的 `size()`。
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```c++ size_type max_size() const noexcept; ```
```c++ size_type max_size() const noexcept; ```
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max_size
max_size
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---
---
:721
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Returns:;; `std::distance(begin(), end())`
Returns:;; `std::distance(begin(), end())`
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```c++ size_type size() const noexcept; ```
```c++ size_type size() const noexcept; ```
06/05/2026

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