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Transparent insert_or_[c]visit
Transparent insert_or_[c]透明 insert++_++or++_[++c++]++visit
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---
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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.
Requires:前置要求：;; `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.满足可移动插入要求。
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。
:1029
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Inserts `obj` in the table if and only if there is no element in the table with an equivalent key. Otherwise, invokes `f` with a const reference to the equivalent element.
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key. Otherwise, invokes `f` 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，才将 `obj` 插入表中；否则，以等价元素的常量引用为参数调用函数 `f`。
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```c++ template<class F> bool insert_or_visit(value_type&& obj, F f); template<class F> bool insert_or_cvisit(value_type&& obj, F f); ```
```c++ template<class Ff=""> bool insert_or_visit(value_type&&amp;&amp; obj, F f); template<class Ff=""> bool insert_or_cvisit(value_type&&amp;&amp; obj, F f); ```</class></class>
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Move insert_or_[c]visit
Move移动 insert_or_[c]++_++or++_[++c++]++visit
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---
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:1017
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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.
Requires:前置要求：;; `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.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。
:1012
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Inserts `obj` in the table if and only if there is no element in the table with an equivalent key. Otherwise, invokes `f` with a const reference to the equivalent element.
Inserts `obj` in the table if and only if there is no element in the table with an equivalent key. Otherwise, invokes `f` 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，才将 `obj` 插入表中；否则，以等价元素的常量引用为参数调用函数 `f`。
:1008
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```c++ template<class F> bool insert_or_visit(const value_type& obj, F f); template<class F> bool insert_or_cvisit(const value_type& obj, F f); ```
```c++ template<class Ff=""> bool insert_or_visit(const value_type&amp; obj, F f); template<class Ff=""> bool insert_or_cvisit(const value_type&amp; obj, F f); ```</class></class>
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Copy insert_or_[c]visit
Copy复制 insert_or_[c]++_++or++_[++c++]++visit
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---
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:1000
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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 a parameter `f` after a variadic parameter pack.
Requires:前置要求：;; `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 a parameter `f` after a variadic parameter pack.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 `f`。
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Inserts an object, constructed with the arguments `args`, in the table if there is no element in the table with an equivalent key. Otherwise, invokes `f` with a const reference to the equivalent element.
Inserts an object, constructed with the arguments `args`, in the table if there is no element in the table with an equivalent key. Otherwise, invokes `f` with a const reference to the equivalent element.若哈希表中不存在等价键的元素，则使用参数 `args` 构造对象并插入表中；否则，以等价元素的常量引用为参数调用函数 `f`。
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```c++ template<class... Args, class F> bool emplace_or_visit(Args&&... args, F&& f); template<class... Args, class F> bool emplace_or_cvisit(Args&&... args, F&& f); ```
```c++ template<class... Aargs,="" class F="" f=""> bool emplace_or_visit(Args&&amp;&amp;... args, F&&amp;&amp; f); template<class... Aargs,="" class F="" f=""> bool emplace_or_cvisit(Args&&amp;&amp;... args, F&& f); ```amp;&amp; f); ```</class...></class...>
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emplace_or_[c]visit
emplace_or_[c]visit
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---
---
:981
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Returns:;; The number of elements inserted.
Returns:;; The number of elements inserted.返回值：;; 成功插入的元素数量。
:979
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Equivalent to [listing,subs="+macros,+quotes"]
Equivalent to等效于 [listing,subs="+macros,+quotes"]
:972
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```c++ size_type insert(std::initializer_list<value_type> il); ```
```c++ size_type insert(std::initializer_list<value_type> il); ```</value_type>
06/05/2026

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