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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 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); ```</class></class></class></class>
:1060	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。
	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`.	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。+ +在形式为 `insert_or_[c]visit(obj, f)` 的调用中，接受 `const value_type&` 参数的重载仅当 `std::remove_cv<std::remove_reference<decltype(obj)>::type>::type` 为 `value_type` 时才参与重载决议。</std::remove_reference<decltype(obj)>
:1072	---	---
	Move insert_or_[c]visit	Move insert_or_[c]visit
	```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 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); ```</class></class></class></class>
:1082	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。
	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`.	要求：value_type 满足 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[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 类型为 value_type，接收 value_type&& 参数的重载函数才会参与重载决议。</decltype(obj)>
:1094	---	---
	Insert Iterator Range or Visit	迭代器范围插入或访问
	```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 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); ```</class></class>
:1104	Equivalent to [listing,subs="+macros,+quotes"]	等效于 [listing,subs="+macros,+quotes"]
:1111	Returns:;; The number of elements inserted.	返回值：插入的元素数量。
:1113	---	---
	Insert Initializer List or Visit	初始化列表插入或访问
	```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 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); ```</value_type></class></value_type></class>
:1121	Equivalent to [listing,subs="+macros,+quotes"]	等效于 [listing,subs="+macros,+quotes"]
:1128	Returns:;; The number of elements inserted.	返回值：插入的元素个数。
:1130	---	---
	emplace_and_[c]visit	emplace_and_[c]visit
	```c++ template<class... Args, class F1, class F2> bool emplace_and_visit(Args&&... args, F1&& f1, F2&& f2); template<class... Args, class F1, class F2> bool emplace_and_cvisit(Args&&... args, F1&& f1, F2&& f2); ```	```c++ template<class... args,="" class="" f1,="" f2=""> bool emplace_and_visit(Args&&... args, F1&& f1, F2&& f2); template<class... args,="" class="" f1,="" f2=""> bool emplace_and_cvisit(Args&&... args, F1&& f1, F2&& f2); ```</class...></class...>
	Inserts an object, constructed with the arguments `args`, in the table if there is no element in the table with an equivalent key, and then invokes `f1` with a non-const reference to the newly created element. Otherwise, invokes `f2` with a reference to the equivalent element; such reference is const iff `emplace_and_cvisit` is used.	若容器中无等价键的元素，则使用参数args构造对象并插入容器，随后以新创建元素的非常量引用调用f1；否则，以等价元素的引用调用f2；若使用emplace_and_cvisit，则该引用为常量引用。
	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.	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。+ +该接口仅为展示说明，因为 C++ 不允许在变参参数包之后声明参数 `f1` 和 `f2`。
:1152	---	---
	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); template<class F1, class F2> bool insert_and_visit(const init_type& obj, F1 f1, F2 f2); template<class F1, class F2> bool insert_and_cvisit(const init_type& obj, F1 f1, F2 f2); ```	```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); template<class f1,="" class="" f2=""> bool insert_and_visit(const init_type& obj, F1 f1, F2 f2); template<class f1,="" class="" f2=""> bool insert_and_cvisit(const init_type& obj, F1 f1, F2 f2); ```</class></class></class></class>
:1162	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 non-const reference to the newly created element. Otherwise, invokes `f2` 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，插入obj，随后以新创建元素的非常量引用调用f1；否则，以等价元素的引用调用f2；若使用*_cvisit重载版本，则该引用为常量引用。
	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_and_[c]visit(obj, f1, f2)`, 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`.	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。+ +在形式为 `insert_and_[c]visit(obj, f1, f2)` 的调用中，接受 `const value_type&` 参数的重载仅当 `std::remove_cv<std::remove_reference<decltype(obj)>::type>::type` 为 `value_type` 时才参与重载决议。</std::remove_reference<decltype(obj)>
:1175	---	---
	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); template<class F1, class F2> bool insert_and_visit(init_type&& obj, F1 f1, F2 f2); template<class F1, class F2> bool insert_and_cvisit(init_type&& obj, F1 f1, F2 f2); ```	```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); template<class f1,="" class="" f2=""> bool insert_and_visit(init_type&& obj, F1 f1, F2 f2); template<class f1,="" class="" f2=""> bool insert_and_cvisit(init_type&& obj, F1 f1, F2 f2); ```</class></class></class></class>

	English	Chinese (Simplified Han script)	Actions
	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&` 和 `const init_type&`）不会产生歧义，并且会选择 `init_type` 重载。
	Move Insert	移动插入
	```c++ bool insert(value_type&& obj); bool insert(init_type&& obj); ```	```c++ bool insert(value_type&& obj); bool insert(init_type&& obj); ```
	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&&` 和 `init_type&&`）不会产生歧义，并且会选择 `init_type` 重载。
	```c++ template<class InputIterator> size_type insert(InputIterator first, InputIterator last); ```	```c++ template<class inputiterator=""> size_type insert(InputIterator first, InputIterator last); ```</class>
	```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... args,="" class="" f=""> bool emplace_or_visit(Args&&... args, F&& f); template<class... args,="" class="" f=""> bool emplace_or_cvisit(Args&&... args, F&& f); ```</class...></class...>
	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.	若容器中无等价键的元素，则使用参数 args 构造对象并插入容器；否则，将等价元素的引用传递给函数 f 并调用 —— 若使用的是 emplace_or_cvisit，则该引用为常量引用。
	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.	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。+ +该接口仅为展示说明，因为 C++ 不允许在变参参数包之后声明参数 `f`。
	```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 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); ```</class></class></class></class>
	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`.	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。+ +在形式为 `insert_or_[c]visit(obj, f)` 的调用中，接受 `const value_type&` 参数的重载仅当 `std::remove_cv<std::remove_reference<decltype(obj)>::type>::type` 为 `value_type` 时才参与重载决议。</std::remove_reference<decltype(obj)>
	Move insert_or_[c]visit	Move insert_or_[c]visit
	```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 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); ```</class></class></class></class>
	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`.	要求：value_type 满足 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[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 类型为 value_type，接收 value_type&& 参数的重载函数才会参与重载决议。</decltype(obj)>
	Insert Iterator Range or Visit	迭代器范围插入或访问
	Insert Initializer List or Visit	初始化列表插入或访问
	```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 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); ```</value_type></class></value_type></class>
	Inserts an object, constructed with the arguments `args`, in the table if there is no element in the table with an equivalent key, and then invokes `f1` with a non-const reference to the newly created element. Otherwise, invokes `f2` with a reference to the equivalent element; such reference is const iff `emplace_and_cvisit` is used.	若容器中无等价键的元素，则使用参数args构造对象并插入容器，随后以新创建元素的非常量引用调用f1；否则，以等价元素的引用调用f2；若使用emplace_and_cvisit，则该引用为常量引用。
	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.	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。+ +该接口仅为展示说明，因为 C++ 不允许在变参参数包之后声明参数 `f1` 和 `f2`。
	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); template<class F1, class F2> bool insert_and_visit(const init_type& obj, F1 f1, F2 f2); template<class F1, class F2> bool insert_and_cvisit(const init_type& obj, F1 f1, F2 f2); ```	```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); template<class f1,="" class="" f2=""> bool insert_and_visit(const init_type& obj, F1 f1, F2 f2); template<class f1,="" class="" f2=""> bool insert_and_cvisit(const init_type& obj, F1 f1, F2 f2); ```</class></class></class></class>
	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_and_[c]visit(obj, f1, f2)`, 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`.	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。+ +在形式为 `insert_and_[c]visit(obj, f1, f2)` 的调用中，接受 `const value_type&` 参数的重载仅当 `std::remove_cv<std::remove_reference<decltype(obj)>::type>::type` 为 `value_type` 时才参与重载决议。</std::remove_reference<decltype(obj)>
	```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); template<class F1, class F2> bool insert_and_visit(init_type&& obj, F1 f1, F2 f2); template<class F1, class F2> bool insert_and_cvisit(init_type&& obj, F1 f1, F2 f2); ```	```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); template<class f1,="" class="" f2=""> bool insert_and_visit(init_type&& obj, F1 f1, F2 f2); template<class f1,="" class="" f2=""> bool insert_and_cvisit(init_type&& obj, F1 f1, F2 f2); ```</class></class></class></class>
	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_and_[c]visit(obj, f1, f2)`, the overloads accepting a `value_type&&` argument participate in overload resolution only if `std::remove_reference<decltype(obj)>::type` is `value_type`.	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。+ +在形式为 `insert_and_[c]visit(obj, f1, f2)` 的调用中，接受 `value_type&&` 参数的重载仅当 `std::remove_reference<decltype(obj)>::type` 为 `value_type` 时才参与重载决议。</decltype(obj)>
	```c++ template<class InputIterator, class F1, class F2> size_type insert_or_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class InputIterator, class F1, class F2> size_type insert_or_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```	```c++ template<class inputiterator,="" class="" f1,="" f2=""> size_type insert_or_visit(InputIterator first, InputIterator last, F1 f1, F2 f2); template<class inputiterator,="" class="" f1,="" f2=""> size_type insert_or_cvisit(InputIterator first, InputIterator last, F1 f1, F2 f2); ```</class></class>
	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>
	try_emplace	try_emplace
	Inserts an element constructed from `k` and `args` into the table if there is no existing element with key `k` contained within it.	若容器中不存在键为k的元素，则将由k和args构造的元素插入容器。
	Returns:;; `true` if an insert took place. + Concurrency:;; Blocking on rehashing of `*this`. Notes:;; This function is similiar to xref:#concurrent_flat_map_emplace[emplace], with the difference that no `value_type` is constructed if there is an element with an equivalent key; otherwise, the construction is of the form: + + -- ```c++	返回值：插入成功则返回true。并发：对当前对象*this进行重哈希时阻塞。说明：该函数与 xref:#concurrent_flat_map_emplace [emplace] 类似，区别在于若存在等价键的元素，则不会构造value_type；否则，构造形式为：
	The `template<class K, class\... Args>` 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.	若`Hash::is_transparent`与`Pred::is_transparent`为合法的成员类型别名，则`template<class k,="" args="">`重载版本才会参与重载决议。库假定`Hash`可同时接收`K`与`Key`类型参数调用，且`Pred`为透明比较器。该设计支持异构查找，避免了实例化`Key`类型对象的开销。</class>

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53950

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