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Returns:;; The number of elements inserted.
Returns:;; The number of elements inserted.返回值：插入的元素个数。
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Equivalent to [listing,subs="+macros,+quotes"]
Equivalent to等效于 [listing,subs="+macros,+quotes"]
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```c++ template<class F> size_type insert_or_visit(std::initializer_list<value_type> il, F f); template<class F> size_type insert_or_cvisit(std::initializer_list<value_type> il, F f); ```
```c++ template<class Ff=""> size_type insert_or_visit(std::initializer_list<value_type> il, F f); template<class Ff=""> size_type insert_or_cvisit(std::initializer_list<value_type> il, F f); ```</value_type></class></value_type></class>
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Insert Initializer List or Visit
Insert Initializer List or Visit初始化列表插入或访问
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---
---
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Returns:;; The number of elements inserted.
Returns:;; The number of elements inserted.返回值：插入的元素数量。
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Equivalent to [listing,subs="+macros,+quotes"]
Equivalent to等效于 [listing,subs="+macros,+quotes"]
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```c++ template<class InputIterator,class F> size_type insert_or_visit(InputIterator first, InputIterator last, F f); template<class InputIterator,class F> size_type insert_or_cvisit(InputIterator first, InputIterator last, F f); ```
```c++ template<class IinputIiterator,class F="" f=""> size_type insert_or_visit(InputIterator first, InputIterator last, F f); template<class IinputIiterator,class F="" f=""> size_type insert_or_cvisit(InputIterator first, InputIterator last, F f); ```</class></class>
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Insert Iterator Range or Visit
Insert Iterator Range or Visit迭代器范围插入或访问
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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. + + In a call of the form `insert_or_[c]visit(obj, f)`, the overloads accepting a `value_type&&` argument participate in overload resolution only if `std::remove_reference<decltype(obj)>::type` is `value_type`.
Requires:;; `要求：value_type` is 满足 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. + + In a call of the form `insert_or_[c]visit(obj, f)`, the overloads accepting a `value_type&&` argument participate in overload resolution only if `可移动插入] 要求。
返回值：插入成功则返回 true。
并发：在当前对象 *this 执行重哈希期间阻塞。
说明：触发重哈希时，会使指向元素的指针和引用失效。
调用形式为 insert_or_[c]visit(obj, f) 时，仅当 std::remove_reference<decltype(obj)>::type` is ` 类型为 value_type`.，接收 value_type&amp;&amp; 参数的重载函数才会参与重载决议。</decltype(obj)>
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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 reference to the equivalent element; such reference is const iff a `*_cvisit` overload is used.
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 reference to the equivalent element; such reference is const iff a `*_cvisit` overload is used.当且仅当容器中无等价键的元素时，插入对象 obj；
否则，以等价元素的引用调用函数 f ——若使用 *_cvisit 重载版本，该引用为常量引用。
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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); template<class F> bool insert_or_visit(init_type&& obj, F f); template<class F> bool insert_or_cvisit(init_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); template<class Ff=""> bool insert_or_visit(init_type&&amp;&amp; obj, F f); template<class Ff=""> bool insert_or_cvisit(init_type&&amp;&amp; obj, F f); ```</class></class></class></class>
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Move insert_or_[c]visit
Move insert_or_[c]visit
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---
---
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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. + + In a call of the form `insert_or_[c]visit(obj, f)`, the overloads accepting a `const value_type&` argument participate in overload resolution only if `std::remove_cv<std::remove_reference<decltype(obj)>::type>::type` is `value_type`.
Requires:;; 要求：`value_type` is需满足 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. + + In a call of the form `insert_or_[c]visit(obj, f)`, the overloads accepting a `const value_type&` argument participate in overload resolution only if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。+ +在形式为 `insert_or_[c]visit(obj, f)` 的调用中，接受 `const value_type&amp;` 参数的重载仅当 `std::remove_cv<std::remove_reference<decltype(obj)>::type>&gt;::type` is为 `value_type`. 时才参与重载决议。</std::remove_reference<decltype(obj)>
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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 reference to the equivalent element; such reference is const iff a `*_cvisit` overload is used.
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 reference to the equivalent element; such reference is const iff a `*_cvisit` overload is used.当且仅当容器中不存在等价键的元素时，将对象 obj 插入容器；
否则，将等价元素的引用传入函数 f 并调用 ——若使用的是 *_cvisit 重载版本，该引用为常量引用。
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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); template<class F> bool insert_or_visit(const init_type& obj, F f); template<class F> bool insert_or_cvisit(const init_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); template<class Ff=""> bool insert_or_visit(const init_type&amp; obj, F f); template<class Ff=""> bool insert_or_cvisit(const init_type&amp; obj, F f); ```</class></class></class></class>
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Copy insert_or_[c]visit
Copy insert_or_[c]visit
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---
---
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