Zen

Translation

:732
English
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 value.
39/1520 · 152

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Key English Chinese (Simplified Han script) Actions
empty
空
```c++ [[nodiscard]] bool empty() const noexcept; ```
```c++ [[nodiscard]] bool empty() const noexcept; ```
Returns:;; `size() == 0`
返回：`size() == 0`
:701
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size
大小
```c++ size_type size() const noexcept; ```
```c++ size_type size() const noexcept; ```
Returns:;; `std::distance(begin(), end())`
返回：`std::distance(begin(), end())`
:712
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max_size
max_size
```c++ size_type max_size() const noexcept; ```
```c++ size_type max_size() const noexcept; ```
Returns:;; `size()` of the largest possible container.
返回：可能的最大容器的 `size()`。
:723
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Modifiers
修改器
emplace
原地构造
```c++ template<class... Args> std::pair<iterator, bool> emplace(Args&&... args); ```
```c++ template<class... args=""> std::pair<iterator, bool=""> emplace(Args&amp;&amp;... args); ```</iterator,></class...>
:732
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 value.
当且仅当容器中没有等价值的元素时，插入一个使用参数 `args` 构造的对象。
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` 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 value. 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 factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.
要求：`value_type` 需从 `args` 处满足对 `X` 的 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^] 要求。返回：若执行了插入，则返回类型中的布尔分量为 `true`。+ + 若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。 抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。 说明：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ + 指向元素的指针和引用永远不会失效。
:744
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emplace_hint
emplace_hint
```c++ template<class... Args> iterator emplace_hint(const_iterator position, Args&&... args); ```
```c++ template<class... args=""> iterator emplace_hint(const_iterator position, Args&amp;&amp;... args); ```</class...>
:751
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 value.
当且仅当容器中没有等价值的元素时，插入一个使用参数 `args` 构造的对象。
`position` is a suggestion to where the element should be inserted.
`position` 是一个关于元素应插入位置的提示。
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; 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:;; The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key. + + Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.
要求：`value_type` 需从 `args` 处满足对 `X` 的 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^] 要求。返回：若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：标准对提示的含义表述相当模糊。但使用它的唯一实际方式，也是 Boost.Unordered 唯一支持的方式，是将其指向具有相同键的现有元素。+ +可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ +指向元素的指针和引用永远不会失效。
:765
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Copy Insert
复制插入
```c++ std::pair<iterator, bool> insert(const value_type& obj); ```
```c++ std::pair<iterator, bool=""> insert(const value_type&amp; obj); ```</iterator,>
:772
Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.
当且仅当容器中不存在等价键时，将 `obj` 对象插入到容器中。
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. 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 factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.
要求：`value_type` 需满足 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[可复制插入^] 要求。返回：若执行了插入，则返回类型中的布尔分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。说明：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。+ +指向元素的指针和引用永远不会失效。
:784
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Move Insert
移动插入
```c++ std::pair<iterator, bool> insert(value_type&& obj); ```
```c++ std::pair<iterator, bool=""> insert(value_type&amp;&amp; obj); ```</iterator,>
Key English Chinese (Simplified Han script) Actions
:614
Requires:;; `value_type` is copy constructible
要求：`value_type` 需满足可复制构造要求。
:616
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:632
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begin
begin
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end
end
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:670
cbegin
cbegin
:678
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:680
cend
cend
:688
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:712
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:723
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:732
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 value.
当且仅当容器中没有等价值的元素时，插入一个使用参数 `args` 构造的对象。
:744
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---
:751
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 value.
当且仅当容器中没有等价值的元素时，插入一个使用参数 `args` 构造的对象。
:765
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:772
Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.
当且仅当容器中不存在等价键时，将 `obj` 对象插入到容器中。
:784
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:791
Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.
当且仅当容器中不存在等价键时，将 `obj` 对象插入到容器中。
:803
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:810
Inserts an element constructed from `std::forward<K>(k)` in the container if and only if there is no element in the container with an equivalent key.
当且仅当容器中不存在等价键的元素时，插入一个由 `std::forward++&lt;++K++&gt;++(k)` 构造的元素。
:824
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:832
`hint` is a suggestion to where the element should be inserted.
`hint` 是插入元素位置的建议。
:844
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:851
Inserts `obj` 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等价的键时，将 `obj` 插入容器。
:853
`hint` is a suggestion to where the element should be inserted.
`hint` 是一个关于元素应插入位置的建议。
:865
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Translation uploaded
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 value.
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 value.当且仅当容器中没有等价值的元素时，插入一个使用参数 `args` 构造的对象。
:732
06/05/2026
User avatar admin

String added in the repository
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 value.
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 value.
:732
06/05/2026
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Glossary

English Chinese (Simplified Han script)
No related strings found in the glossary.

String information

Key
:732
Flags
safe-html, strict-same
Unit identifier
51011
Source string location
:732
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_set_zh_Hans.adoc, string 176