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Translation

:971
English
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key.
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Key English Chinese (Simplified Han script) Actions
Returns:;; The number of elements in the table.
返回值：表中的元素数量。
Notes:;; In the presence of concurrent insertion operations, the value returned may not accurately reflect the true size of the table right after execution.
注意：在存在并发插入操作时，返回的值可能无法准确反映函数执行后容器的真实大小。
:933
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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 table.
返回值：容器所能容纳的最大元素数量（最大容量）。
:944
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Modifiers
修改器
emplace
原地构造
```c++ template<class... Args> bool emplace(Args&&... args); ```
```c++ template<class... args=""> bool emplace(Args&amp;&amp;... args); ```</class...>
Inserts an object, constructed with the arguments `args`, in the table if and only if there is no element in the table with an equivalent key.
当且仅当容器中不存在等价键的元素时，才会使用参数 args 构造对象并插入到容器中。
Requires:;; `value_type` is constructible from `args`. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + If `args...` is of the form `k,v`, it delays constructing the whole object until it is certain that an element should be inserted, using only the `k` argument to check.
要求：`value_type` 可从 `args` 构造。返回：若执行了插入则返回 `true`。并发：在 `*this` 的 rehash 操作上阻塞。注意：如果执行了 rehash，则指向元素的指针和引用会失效。+ +若 `args...` 的形式为 `k,v`，则仅在确定应插入元素时才构造整个对象，检查时仅使用 `k` 参数。
:963
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Copy Insert
复制插入
```c++ bool insert(const value_type& obj); bool insert(const init_type& obj); ```
```c++ bool insert(const value_type&amp; obj); bool insert(const init_type&amp; obj); ```
:971
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key.
当且仅当容器中不存在等价键的元素时，才将对象 obj 插入到容器中。
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; `true` if an insert took place. + Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + A call of the form `insert(x)`, where `x` is equally convertible to both `const value_type&` and `const init_type&`, is not ambiguous and selects the `init_type` overload.
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 `true`。并发：在 `*this` 的 rehash 操作上阻塞。注意：如果执行了 rehash，则指向元素的指针和引用会失效。+ +形式为 `insert(x)` 的调用（其中 `x` 可同等转换为 `const value_type&amp;` 和 `const init_type&amp;`）不会产生歧义，并且会选择 `init_type` 重载。
:981
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---
Move Insert
移动插入
```c++ bool insert(value_type&& obj); bool insert(init_type&& obj); ```
```c++ bool insert(value_type&amp;&amp; obj); bool insert(init_type&amp;&amp; obj); ```
:989
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key.
当且仅当容器中无等价键的元素时，将对象 obj 插入容器。
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Invalidates pointers and references to elements if a rehashing is issued. + + A call of the form `insert(x)`, where `x` is equally convertible to both `value_type&&` and `init_type&&`, is not ambiguous and selects the `init_type` overload.
要求：`value_type` 需满足 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[可移动插入^] 要求。返回：若执行了插入则返回 `true`。并发：在 `*this` 的 rehash 操作上阻塞。注意：如果执行了 rehash，则指向元素的指针和引用会失效。+ +形式为 `insert(x)` 的调用（其中 `x` 可同等转换为 `value_type&amp;&amp;` 和 `init_type&amp;&amp;`）不会产生歧义，并且会选择 `init_type` 重载。
:999
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Insert Iterator Range
迭代器范围插入
```c++ template<class InputIterator> size_type insert(InputIterator first, InputIterator last); ```
```c++ template<class inputiterator=""> size_type insert(InputIterator first, InputIterator last); ```</class>
:1006
Equivalent to [listing,subs="+macros,+quotes"]
等效于 [listing,subs="+macros,+quotes"]
:1013
Returns:;; The number of elements inserted.
返回值：成功插入的元素数量。
:1015
---
---
Insert Initializer List
初始化列表插入
```c++ size_type insert(std::initializer_list<value_type> il); ```
```c++ size_type insert(std::initializer_list<value_type> il); ```</value_type>
:1022
Equivalent to [listing,subs="+macros,+quotes"]
等效于 [listing,subs="+macros,+quotes"]

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Translation uploaded
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key.
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key.当且仅当容器中不存在等价键的元素时，才将对象 obj 插入到容器中。
:971
06/05/2026
User avatar admin

String added in the repository
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key.
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key.
:971
06/05/2026
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Glossary

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

String information

Key
:971
Flags
safe-html, strict-same
Unit identifier
53911
Source string location
:971
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/concurrent_flat_map_zh_Hans.adoc, string 214