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Translation

:1160
English
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. 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. + + These overloads only participate 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.
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Key English Chinese (Simplified Han script) Actions
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. + + The interface is exposition only, as C++ does not allow to declare parameters `f1` and `f2` after a variadic parameter pack.
前置要求：;; `value_type` 可由参数 `args` 构造。
返回值：;; 成功插入元素时返回 `true`。
并发特性：;; 若触发重哈希，则会阻塞当前对象 `*this`。
注意：;; 若执行重哈希，将使指向元素的指针和引用失效。
该接口仅为说明性设计，因为 C++ 不允许在可变参数包之后声明参数 `f1` 和 `f2`。
:1111
---
---
Copy insert_and_[c]visit
复制 insert++_++and++_[++c++]++visit
```c++ template<class F1, class F2> bool insert_and_visit(const value_type& obj, F1 f1, F2 f2); template<class F1, class F2> bool insert_and_cvisit(const value_type& obj, F1 f1, F2 f2); ```
```c++ template<class f1,="" class="" f2=""> bool insert_and_visit(const value_type&amp; obj, F1 f1, F2 f2); template<class f1,="" class="" f2=""> bool insert_and_cvisit(const value_type&amp; obj, F1 f1, F2 f2); ```</class></class>
:1119
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key, and then invokes `f1` with a const reference to the newly created element. Otherwise, invokes `f2` with a const reference to the equivalent element.
当且仅当哈希表中不存在等价键的元素时，将 `obj` 插入表中，随后以新创建元素的常量引用为参数调用函数 `f1`；否则，以等价元素的常量引用为参数调用函数 `f2`。
:1124
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.
前置要求：;; `value_type` 满足可复制插入要求。
返回值：;; 成功插入元素时返回 `true`。
并发特性：;; 若触发重哈希，则会阻塞当前对象 `*this`。
注意：;; 若执行重哈希，将使指向元素的指针和引用失效。
:1129
---
---
Move insert_and_[c]visit
移动 insert++_++and++_[++c++]++visit
```c++ template<class F1, class F2> bool insert_and_visit(value_type&& obj, F1 f1, F2 f2); template<class F1, class F2> bool insert_and_cvisit(value_type&& obj, F1 f1, F2 f2); ```
```c++ template<class f1,="" class="" f2=""> bool insert_and_visit(value_type&amp;&amp; obj, F1 f1, F2 f2); template<class f1,="" class="" f2=""> bool insert_and_cvisit(value_type&amp;&amp; obj, F1 f1, F2 f2); ```</class></class>
:1137
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key, and then invokes `f1` with a const reference to the newly created element. Otherwise, invokes `f2` with a const reference to the equivalent element.
当且仅当表中不存在键等价的元素时，将`obj`插入表中，随后使用新建元素的常量引用调用`f1`；否则使用等价元素的常量引用调用`f2`。
:1142
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.
要求：;; `value_type` 满足 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]。
返回值：;; 执行插入操作则返回 `true`。
并发特性：;; 对 `*this` 执行重哈希时会阻塞。
备注：;; 执行重哈希后，指向元素的指针和引用将会失效。
:1147
---
---
Transparent insert_and_[c]visit
透明 insert++_++and++_[++c++]++visit（透明插入并 ++[++c++]++ 访问）
```c++ template<class K, class F1, class F2> bool insert_and_visit(K&& k, F1 f1, F2 f2); template<class K, class F1, class F2> bool insert_and_cvisit(K&& k, F1 f1, F2 f2); ```
```c++ template<class k,="" class="" f1,="" f2=""> bool insert_and_visit(K&amp;&amp; k, F1 f1, F2 f2); template<class k,="" class="" f1,="" f2=""> bool insert_and_cvisit(K&amp;&amp; k, F1 f1, F2 f2); ```</class></class>
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, and then invokes `f1` with a const reference to the newly created element. Otherwise, invokes `f2` with a const reference to the equivalent element.
当且仅当容器中不存在键等价的元素时，将通过`std::forward<k>(k)`构造的元素插入容器，随后使用新建元素的常量引用调用`f1`；否则使用等价元素的常量引用调用`f2`。</k>
:1160
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. 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. + + These overloads only participate 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.
要求：;; `value_type` 可由 `k` 进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] 构造。
返回值：;; 执行插入操作则返回 `true`。
并发特性：;; 对 `*this` 执行重哈希时会阻塞。
备注：;; 执行重哈希后，指向元素的指针和引用将会失效。

这些重载仅当 `Hash::is_transparent` 与 `Pred::is_transparent` 为合法成员类型别名时才参与重载决议。标准库假定 `Hash` 可同时接受 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。
:1167
---
---
Insert Iterator Range and Visit
迭代器范围插入并访问
```c++ template<class InputIterator,class F1, class F2> size_type insert_and_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class InputIterator,class F1, class F2> size_type insert_and_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```
```c++ template<class inputiterator,class="" f1,="" class="" f2=""> size_type insert_and_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class inputiterator,class="" f1,="" class="" f2=""> size_type insert_and_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```</class></class>
:1177
Equivalent to [listing,subs="+macros,+quotes"]
等效于 [listing,subs="+macros,+quotes"]
:1184
Returns:;; The number of elements inserted.
返回值：;; 插入的元素数量。
:1186
---
---
Insert Initializer List and Visit
初始化列表插入并访问
```c++ template<class F1, class F2> size_type insert_and_visit(std::initializer_list<value_type> il, F1 f1, F2 f2); template<class F1, class F2> size_type insert_and_cvisit(std::initializer_list<value_type> il, F1 f1, F2 f2); ```
```c++ template<class f1,="" class="" f2=""> size_type insert_and_visit(std::initializer_list<value_type> il, F1 f1, F2 f2); template<class f1,="" class="" f2=""> size_type insert_and_cvisit(std::initializer_list<value_type> il, F1 f1, F2 f2); ```</value_type></class></value_type></class>
:1196
Equivalent to [listing,subs="+macros,+quotes"]
等效于 [listing,subs="+macros,+quotes"]
:1203
Returns:;; The number of elements inserted.
返回值：;; 插入的元素数量。
:1205
---
---
erase
擦除
```c++ size_type erase(const key_type& k); template<class K> size_type erase(const K& k); ```
```c++ size_type erase(const key_type&amp; k); template<class k=""> size_type erase(const K&amp; k); ```</class>
Erases the element with key equivalent to `k` if it exists.
若存在键与`k`等价的元素，则将其删除。
Returns:;; The number of elements erased (0 or 1). 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.
返回值：;; 删除的元素数量（0 或 1）。
抛出：;; 仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出异常。
备注：;; `template<class k="">` 重载仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 为合法成员类型别名时才参与重载决议。标准库假定 `Hash` 可同时接受 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。</class>
Key English Chinese (Simplified Han script) Actions
:1046
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. 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. + + These overloads only participate 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.
前置要求：;; `value_type` 可通过 `k` 原位构造。
返回值：;; 成功插入元素时返回 `true`。
并发特性：;; 若触发重哈希，则会阻塞当前对象 `*this`。
注意：;; 若执行重哈希，将使指向元素的指针和引用失效。
仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员别名时，该组重载才参与重载决议。
库假定 `Hash` 可同时接收 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这支持异构查找，避免实例化 `Key` 类型对象的开销。
:1053
---
---
:1063
Equivalent to [listing,subs="+macros,+quotes"]
等效于 [listing,subs="+macros,+quotes"]
:1070
Returns:;; The number of elements inserted.
返回值：;; 成功插入的元素数量。
:1072
---
---
:1080
Equivalent to [listing,subs="+macros,+quotes"]
等效于 [listing,subs="+macros,+quotes"]
:1087
Returns:;; The number of elements inserted.
返回值：;; 成功插入的元素数量。
:1089
---
---
:1111
---
---
:1119
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key, and then invokes `f1` with a const reference to the newly created element. Otherwise, invokes `f2` with a const reference to the equivalent element.
当且仅当哈希表中不存在等价键的元素时，将 `obj` 插入表中，随后以新创建元素的常量引用为参数调用函数 `f1`；否则，以等价元素的常量引用为参数调用函数 `f2`。
:1124
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.
前置要求：;; `value_type` 满足可复制插入要求。
返回值：;; 成功插入元素时返回 `true`。
并发特性：;; 若触发重哈希，则会阻塞当前对象 `*this`。
注意：;; 若执行重哈希，将使指向元素的指针和引用失效。
:1129
---
---
:1137
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key, and then invokes `f1` with a const reference to the newly created element. Otherwise, invokes `f2` with a const reference to the equivalent element.
当且仅当表中不存在键等价的元素时，将`obj`插入表中，随后使用新建元素的常量引用调用`f1`；否则使用等价元素的常量引用调用`f2`。
:1142
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.
要求：;; `value_type` 满足 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]。
返回值：;; 执行插入操作则返回 `true`。
并发特性：;; 对 `*this` 执行重哈希时会阻塞。
备注：;; 执行重哈希后，指向元素的指针和引用将会失效。
:1147
---
---
:1160
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. 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. + + These overloads only participate 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.
要求：;; `value_type` 可由 `k` 进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] 构造。
返回值：;; 执行插入操作则返回 `true`。
并发特性：;; 对 `*this` 执行重哈希时会阻塞。
备注：;; 执行重哈希后，指向元素的指针和引用将会失效。

这些重载仅当 `Hash::is_transparent` 与 `Pred::is_transparent` 为合法成员类型别名时才参与重载决议。标准库假定 `Hash` 可同时接受 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。
:1167
---
---
:1177
Equivalent to [listing,subs="+macros,+quotes"]
等效于 [listing,subs="+macros,+quotes"]
:1184
Returns:;; The number of elements inserted.
返回值：;; 插入的元素数量。
:1186
---
---
:1196
Equivalent to [listing,subs="+macros,+quotes"]
等效于 [listing,subs="+macros,+quotes"]
:1203
Returns:;; The number of elements inserted.
返回值：;; 插入的元素数量。
:1205
---
---
:1220
---
---
:1237
---
---
:1239
erase_if
erase++_++if
:1250
---
---
:1268
---
---
:1285
---
---
:1298
---
---

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Translation uploaded
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. 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. + + These overloads only participate 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.
Requires:要求：;; `value_type` is可由 `k` 进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. 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. + + These overloads only participate in overload resolution if构造。
返回值：;; 执行插入操作则返回 `true`。
并发特性：;; 对 `*this` 执行重哈希时会阻塞。
备注：;; 执行重哈希后，指向元素的指针和引用将会失效。

这些重载仅当 `Hash::is_transparent` and与 `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both为合法成员类型别名时才参与重载决议。标准库假定 `Hash` 可同时接受 `K` and与 `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。
:1160
06/05/2026
User avatar admin

String added in the repository
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. 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. + + These overloads only participate 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.
Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `k`. 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. + + These overloads only participate 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.
:1160
06/05/2026
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Key
:1160
Flags
safe-html, strict-same
Unit identifier
50428
Source string location
:1160
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_set_zh_Hans.adoc, string 285