Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Unordered Flat Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; The `bool` component of the …

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Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + A call of the form `insert(hint, x)`, where `x` is equally convertible to both `const value_type&` and `const init_type&`, is not ambiguous and selects the `init_type` overload.

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Key	English	Chinese (Simplified Han script)
:778	Requires:;; `value_type` is constructible from `args`. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + If `args...` is of the form `k,v`, it delays constructing the whole object until it is certain that an element should be inserted, using only the `k` argument to check.	要求：`value_type` 可从 `args` 构造。返回：若执行了插入，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +若 `args...` 的形式为 `k,v`，则仅在确定应插入元素时才构造整个对象，检查时仅使用 `k` 参数。
:787	---	---
	Copy Insert	复制插入
	```c++ std::pair<iterator, bool> insert(const value_type& obj); std::pair<iterator, bool> insert(const init_type& obj); ```	```c++ std::pair<iterator, bool=""> insert(const value_type& obj); std::pair<iterator, bool=""> insert(const init_type& obj); ```</iterator,></iterator,>
:795	Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中没有等价的键时，将 `obj` 插入容器。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + 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，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +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。
:807	---	---
	Move Insert	移动插入
	```c++ std::pair<iterator, bool> insert(value_type&& obj); std::pair<iterator, bool> insert(init_type&& obj); ```	```c++ std::pair<iterator, bool=""> insert(value_type&& obj); std::pair<iterator, bool=""> insert(init_type&& obj); ```</iterator,></iterator,>
:815	Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中没有等价的键时，将 `obj` 插入容器。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + 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，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +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。
:827	---	---
	Copy Insert with Hint	带提示的复制插入
	```c++ iterator insert(const_iterator hint, const value_type& obj); iterator insert(const_iterator hint, const init_type& obj); ``` Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	`iterator insert(const_iterator hint, const value_type& obj); iterator insert(const_iterator hint, const init_type& obj);` 当且仅当容器中没有等价的键时，将 `obj` 插入容器。
:836	`hint` is a suggestion to where the element should be inserted. This implementation ignores it.	`hint` 是一个关于元素插入位置的提示，本实现将忽略该提示。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + A call of the form `insert(hint, 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，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +形式为 `insert(hint, 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。
:848	---	---
	Move Insert with Hint	带提示的移动插入
	```c++ iterator insert(const_iterator hint, value_type&& obj); iterator insert(const_iterator hint, init_type&& obj); ```	```c++ iterator insert(const_iterator hint, value_type&& obj); iterator insert(const_iterator hint, init_type&& obj); ```
:856	Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	当且仅当容器中不存在等价键时，将 `obj` 对象插入到容器中。
:858	`hint` is a suggestion to where the element should be inserted. This implementation ignores it.	`hint` 是一个关于元素应插入位置的建议。此实现会忽略该建议。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + A call of the form `insert(hint, 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，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +形式为 `insert(hint, 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。
:870	---	---
	Insert Iterator Range	迭代器范围插入
	```c++ template<class InputIterator> void insert(InputIterator first, InputIterator last); ```	```c++ template<class inputiterator=""> void insert(InputIterator first, InputIterator last); ```</class>
:877	Inserts a range of elements into the container. Elements are inserted if and only if there is no element in the container with an equivalent key.	将元素范围插入容器中。仅当容器中不存在等价键的元素时，才会插入相应元素。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into the container from `*first`. Throws:;; When inserting a single element, if an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load.	要求：`value_type` 需从 `*first` 处满足对容器的 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^] 要求。抛出：当插入单个元素时，若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。
:884	---	---
	Insert Initializer List	初始化列表插入
	```c++ void insert(std::initializer_list<value_type>); ```	```c++ void insert(std::initializer_list<value_type>); ```</value_type>
:891	Inserts a range of elements into the container. Elements are inserted if and only if there is no element in the container with an equivalent key.	将范围内的元素插入容器中。当且仅当容器中没有等价的键时，才会插入元素。

	English	Chinese (Simplified Han script)	Actions
	```c++ size_type max_size() const noexcept; ```	```c++ size_type max_size() const noexcept; ```
	Returns:;; `size()` of the largest possible container.	返回：可能的最大容器的 `size()`。
	Modifiers	修改器
	```c++ template<class... Args> std::pair<iterator, bool> emplace(Args&&... args); ```	```c++ template<class... args=""> std::pair<iterator, bool=""> emplace(Args&&... args); ```</iterator,></class...>
	```c++ template<class M> std::pair<iterator, bool> insert_or_assign(const key_type& k, M&& obj); template<class M> std::pair<iterator, bool> insert_or_assign(key_type&& k, M&& obj); template<class K, class M> std::pair<iterator, bool> insert_or_assign(K&& k, M&& obj); ```	```c++ template<class m=""> std::pair<iterator, bool=""> insert_or_assign(const key_type& k, M&& obj); template<class m=""> std::pair<iterator, bool=""> insert_or_assign(key_type&& k, M&& obj); template<class k,="" class="" m=""> std::pair<iterator, bool=""> insert_or_assign(K&& k, M&& obj); ```</iterator,></class></iterator,></class></iterator,></class>
	```c++ std::pair<iterator, bool> insert(const value_type& obj); std::pair<iterator, bool> insert(const init_type& obj); ```	```c++ std::pair<iterator, bool=""> insert(const value_type& obj); std::pair<iterator, bool=""> insert(const init_type& obj); ```</iterator,></iterator,>
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + 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，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +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。
	Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators pointers and references, but only if the insert causes the load to be greater than the maximum load. + + The `template<class K, class M>` 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：若执行了插入，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能会导致迭代器、指针和引用失效，但仅当插入操作导致负载因子超过最大负载因子时才会发生。+ +`template<class k,="" class="" m="">` 仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时参与重载决议。库假定 `Hash` 可同时以 `K` 和 `Key` 调用，且 `Pred` 是透明的。这提供了异构查找能力，从而避免构造 `Key` 类型实例的开销。</class>
	insert_or_assign with Hint	带提示的 insert++_++or++_++assign
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + 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，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +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。
	The performance of `boost::unordered_flat_map` is much better than that of `boost::unordered_map` or other implementations of `std::unordered_map`. Unlike standard unordered associative containers, which are node-based, the elements of a `boost::unordered_flat_map` are held directly in the bucket array, and insertions into an already occupied bucket are diverted to available buckets in the vicinity of the original position. This type of data layout is known as _open addressing_.	`boost::unordered++_++flat++_++map` 的性能远优于 `boost::unordered++_++map` 或其他 `std::unordered++_++map` 的实现。与基于节点的标准无序关联容器不同， `boost::unordered++_++flat++_++map` 的元素直接存储在桶数组中，且当元素被插入到已被占用的桶时，会将其重定向到原始位置附近的可用桶。这种数据布局类型称为__开放寻址法__。
	```c++ iterator insert(const_iterator hint, const value_type& obj); iterator insert(const_iterator hint, const init_type& obj); ``` Inserts `obj` in the container if and only if there is no element in the container with an equivalent key.	`iterator insert(const_iterator hint, const value_type& obj); iterator insert(const_iterator hint, const init_type& obj);` 当且仅当容器中没有等价的键时，将 `obj` 插入容器。
	- `value_type` must be move-constructible. - Pointer stability is not kept under rehashing. - `begin()` is not constant-time. - There is no API for bucket handling (except `bucket_count`) or node extraction/insertion. - The maximum load factor of the container is managed internally and can't be set by the user.	- `value++_++type` 必须支持移动构造。 - 在重哈希的过程中，指针稳定性无法保持。 - `begin()` 不是常数时间复杂度操作。 - 未提供用于桶管理（除 `bucket++_++count` 外）或节点提取/插入的 API。 - 容器的最大负载因子由内部管理，用户无法进行设置。
	The elements of the container are held into an internal _bucket array_. An element is inserted into a bucket determined by its hash code, but if the bucket is already occupied (a _collision_), an available one in the vicinity of the original position is used.	容器的元素存储在内部的__桶数组__中。元素根据其哈希码被插入到对应的桶中，但如果该桶已被占用（即发生__冲突__），则会使用原始位置附近可用的桶。
	Erase by Position	通过位置擦除
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + A call of the form `insert(hint, 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，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +形式为 `insert(hint, 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。
	Erase the element pointed to by `position`.	擦除由 `position` 指向的元素。
	Erase by Key	通过键擦除
	The size of the bucket array can be automatically increased by a call to `insert`/`emplace`, or as a result of calling `rehash`/`reserve`. The _load factor_ of the container (number of elements divided by number of buckets) is never greater than `max_load_factor()`, except possibly for small sizes where the implementation may decide to allow for higher loads.	桶数组的大小可通过调用 `insert` / `emplace` 自动增加，也可通过调用 `rehash` / `reserve` 来调整。容器的__负载因子__（元素数量与桶数量的比值）始终不会超过 `max++_++load++_++factor()` ，但在小规模数据情况下，实现可能允许更高的负载因子。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + A call of the form `insert(hint, 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，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +形式为 `insert(hint, 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。
	If `a == other.get_allocator()`, the elements of `other` are transferred directly to the new container; otherwise, elements are moved-constructed from those of `other`. The hash function and predicate are moved-constructed from `other`, and the allocator is copy-constructed from `a`. If statistics are xref:unordered_flat_map_boost_unordered_enable_stats[enabled], transfers the internal statistical information from `other` iff `a == other.get_allocator()`, and always calls `other.reset_stats()`.	若 `a == other.get_allocator()`，则 `other` 的元素直接转移到新容器中；否则，将通过移动构造从 `other` 的元素创建新元素。哈希函数和谓词通过移动构造从 `other` 获得，分配器则通过复制构造从 `a` 获得。若统计功能已启用（参见 xref:unordered_flat_map_boost_unordered_enable_stats[相关说明]），则仅当 `a == other.get_allocator()` 时转移 `other` 的内部统计信息，且始终会调用 `other.reset_stats()`。
	Move construction from a xref:#concurrent_flat_map[`concurrent_flat_map`]. The internal bucket array of `other` is transferred directly to the new container. The hash function, predicate and allocator are moved-constructed from `other`. If statistics are xref:unordered_flat_map_boost_unordered_enable_stats[enabled], transfers the internal statistical information from `other` and calls `other.reset_stats()`.	从 xref:#concurrent_flat_map[`concurrent_flat_map`][`concurrent++_++flat++_++map`] 移动构造。 `other` 的内部桶数组直接转移至新容器。哈希函数、谓词和分配器均从 `other` 移动构造。若统计功能 xref:#unordered_flat_map_boost_unordered_enable_stats[已启用] ，则转移 `other` 的内部统计信息，并调用 `other.reset++_++stats()` 。
	Erases the elements in the range from `first` to `last`.	擦除从 `first` 到 `last` 范围内的元素。
	Returns:;; The iterator following the erased elements - i.e. `last`. Throws:;; Nothing in this implementation (neither the `hasher` nor the `key_equal` objects are called).	返回：指向被擦除元素之后位置的迭代器，即 `last`。抛出：在此实现中不会抛出异常（既不调用 `hasher` 也不调用 `key_equal` 对象）。
	swap	交换
	Iterator Range Constructor with Bucket Count and Hasher	带桶数和哈希函数的迭代器范围构造函数
	Constructs an empty container using `a` and default hash function and key equality predicate, and inserts the elements from `il` into it.	构造一个空容器，使用 `a` 作为分配器、以及默认的哈希函数和键相等性谓词，并将 `il` 中的元素插入其中。
	Destructor	析构函数
	```c++ ~unordered_flat_map(); ```	```c++ ~unordered_flat_map(); ```
	The assignment operator. Destroys previously existing elements, copy-assigns the hash function and predicate from `other`, copy-assigns the allocator from `other` if `Alloc::propagate_on_container_copy_assignment` exists and `Alloc::propagate_on_container_copy_assignment::value` is `true`, and finally inserts copies of the elements of `other`.	赋值操作符。该操作会销毁容器中原有的元素，并从 other 复制赋值哈希函数与键相等性谓词。若 Alloc::propagate_on_container_copy_assignment 存在，且 Alloc::propagate_on_container_copy_assignment::value 为 true，则从 other 复制赋值分配器，最后插入 other 中所有元素的副本。

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~~Requires:;;~~ 要求：`value_type` is需满足 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. Returns:;; The `bool` component of the return type is `true` if an insert took place. + + If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, pointers and references, but only if the insert causes the load to be greater than the maximum load. + + A call of the form ìnsert(hint, x)`, where `x` is equally convertible to both可复制插入^] 要求。返回：若执行了插入，则返回类型中的 `bool` 分量为 `true`。+ +若执行了插入，则迭代器指向新插入的元素；否则指向等价的元素。抛出：若调用 `hasher` 以外的操作抛出异常，则函数无效果。注意：可能使迭代器、指针和引用失效，但仅当插入导致负载大于最大负载时才会发生。+ +形式为 ìnsert(hint, x)` 的调用（其中 `x` 可同等转换为 `const value_type&~~` and~~amp;` 和 `const init_type&~~`, is not ambiguous and selects the~~amp;`）不会产生歧义，并且会选择 ìnit_type` ~~overload.~~重载。

06/05/2026

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