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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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:1153
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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:;; 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:;; 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 要求。
返回值：;; 成功执行插入操作则返回 `true`。
并发特性：;; 对当前对象执行重哈希操作时会发生阻塞。
注意：;; 在形式为 `insert_or_[c]visit(obj, f)` 的调用中，仅当 `std::remove_reference<decltype(obj)>::type` is为 `value_type`. 时，接受 `value_type&amp;&amp;` 参数的重载版本才会参与重载决议。</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.当且仅当哈希表中不存在等价键的元素时，将`obj`插入表中。否则，调用`f`并传入等价元素的引用；当且仅当使用`*_cvisit`重载版本时，该引用为常量引用。
:1143
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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移动 insert_or_[c]++_++or++_[++c++]++visit
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:1133
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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:;; 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:;; 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 要求。
返回值：;; 成功执行插入操作则返回 `true`。
并发特性：;; 对当前对象执行重哈希操作时会发生阻塞。
注意：;; 在形式为 `insert_or_[c]visit(obj, f)` 的调用中，仅当 `std::remove_cv<std::remove_reference<decltype(obj)>::type>&gt;::type` is `value_type`.为 `value_type` 时，接受 `const value_type&amp;` 参数的重载版本才会参与重载决议。</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.当且仅当哈希表中不存在等价键的元素时，将`obj`插入表中。否则，调用`f`并传入等价元素的引用；当且仅当使用`*_cvisit`重载版本时，该引用为常量引用。
:1123
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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复制 insert_or_[c]++_++or++_[++c++]++visit
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---
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:1113
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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:;; The interface is exposition only, as C++ does not allow to declare a parameter `f` after a variadic parameter pack.
Requires:要求：;; `value_type` is constructible from `args`. Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; 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：;; 成功执行插入操作则返回 `true`。
并发特性：;; 对当前对象执行重哈希操作时会发生阻塞。
注意：;; 该接口仅为说明性接口，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 reference to the equivalent element; such reference is const iff `emplace_or_cvisit` is used.
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 reference to the equivalent element; such reference is const iff 若表中无等价键元素，则使用参数`args`构造对象并插入表中。否则，调用`f`并传入等价元素的引用；当且仅当使用`emplace_or_cvisit` is used.时，该引用为常量引用。
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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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:1096
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Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Behavior is undefined if `nh` is not empty and the allocators of `nh` and the container are not equal.
Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; Behavior is undefined if `nh` is not empty and the allocators of `nh` and the container are not equal.若 `nh` 非空，则当且仅当容器中不存在键等价于 `nh.key()` 的元素时，插入关联元素。函数返回时 `nh` 为空。
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If the insertion failed, `inserted` is false and `node` has the previous value of `nh`.
If the insertion failed,若插入操作失败，则 `inserted` is为 false and，且 `node` has the previous value of `nh`.保留 `nh` 的原值。
:1091
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Otherwise if the insertion took place, `inserted` is true and `node` is empty.
Otherwise if the insertion took place,若插入操作成功，则 `inserted` is为 true and， 且 `node` is empty.为空。
:1090
06/05/2026

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