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Key	English	Chinese (Simplified Han script)
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate, and `a` as the allocator.	构造一个至少包含 `n` 个桶的空容器，使用 `hf` 作为哈希函数、 `eql` 作为键相等性谓词、以及 `a` 作为分配器。
:387	Postconditions:;; `size() == 0` Requires:;; If the defaults are used, `hasher`, `key_equal` and `allocator_type` need to be https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].	后置条件：`size() == 0` 要求：若使用默认参数，则 `hasher`、`key_equal` 和 `allocator_type` 需满足 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[可默认构造^] 要求。
:390	---	---
	Iterator Range Constructor	迭代器范围构造函数
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate and `a` as the allocator, and inserts the elements from `[f, l)` into it.	构造一个至少包含 `n` 个桶的空容器，使用 `hf` 作为哈希函数、 `eql` 作为键相等性谓词、 `a` 作为分配器，并将区间 `++[++f, l)` 中的元素插入其中。
:406	Requires:;; If the defaults are used, `hasher`, `key_equal` and `allocator_type` need to be https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].	要求;; 若使用默认值，则 `hasher` 、 `key++_++equal` 和 `allocator++_++type` 需满足 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[可默认构造] 要求。
:408	---	---
	Copy Constructor	复制构造函数
	```c++ unordered_flat_map(unordered_flat_map const& other); ```	```c++ unordered_flat_map(unordered_flat_map const& other); ```
	The copy constructor. Copies the contained elements, hash function, predicate and allocator.	复制构造函数。复制所含元素、哈希函数、谓词和分配器。
	If `Allocator::select_on_container_copy_construction` exists and has the right signature, the allocator will be constructed from its result.	若 `Allocator::select++_++on++_++container++_++copy++_++construction` 存在且签名正确，则将根据其结果来构造分配器。
	Requires:;; `value_type` is copy constructible	要求：`value_type` 需满足可复制构造要求。
:422	---	---
	Move Constructor	移动构造函数
	```c++ unordered_flat_map(unordered_flat_map&& other); ```	```c++ unordered_flat_map(unordered_flat_map&& other); ```
	The move constructor. 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()`.	移动构造函数。`other` 的内部桶数组直接转移到新容器中。哈希函数、谓词和分配器通过移动构造从 `other` 获得。若统计功能已启用（参见 xref:unordered_flat_map_boost_unordered_enable_stats[相关说明]），则转移 `other` 的内部统计信息并调用 `other.reset_stats()`。
:434	---	---
	Iterator Range Constructor with Allocator	带分配器的迭代器范围构造函数
	```c++ template<class InputIterator> unordered_flat_map(InputIterator f, InputIterator l, const allocator_type& a); ```	```c++ template<class inputiterator=""> unordered_flat_map(InputIterator f, InputIterator l, const allocator_type& a); ```</class>
	Constructs an empty container using `a` as the allocator, with the default hash function and key equality predicate and inserts the elements from `[f, l)` into it.	使用 `a` 作为分配器构造一个空容器，使用默认的哈希函数和键相等谓词，并将 `[f, l)` 中的元素插入其中。
:445	Requires:;; `hasher`, `key_equal` need to be https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[DefaultConstructible^].	要求：`hasher`、`key_equal` 需满足 https://en.cppreference.com/w/cpp/named_req/DefaultConstructible[可默认构造^] 要求。
:447	---	---
	Allocator Constructor	分配器构造函数
	```c++ explicit unordered_flat_map(Allocator const& a); ```	```c++ explicit unordered_flat_map(Allocator const& a); ```
	Constructs an empty container, using allocator `a`.	使用分配器 a 构造一个空容器。
:456	---	---
	Copy Constructor with Allocator	带分配器的复制构造函数
	```c++ unordered_flat_map(unordered_flat_map const& other, Allocator const& a); ```	```c++ unordered_flat_map(unordered_flat_map const& other, Allocator const& a); ```
	Constructs a container, copying ``other``'s contained elements, hash function, and predicate, but using allocator `a`.	构造一个容器，复制 `other` 所包含的元素、哈希函数和谓词，但使用分配器 `a`。
:465	---	---
	Move Constructor with Allocator	带分配器的移动构造函数

	English	Chinese (Simplified Han script)	Actions
	```c++ const_iterator cbegin() const noexcept; ```	```c++ const_iterator cbegin() const noexcept; ```
	Returns:;; A `const_iterator` referring to the first element of the container, or if the container is empty the past-the-end value for the container. Complexity:;; O(`bucket_count()`)	返回：指向容器第一个元素的 `const_iterator`，若容器为空，则返回容器尾后迭代器。复杂度：O(`bucket_count()`)
	```c++ template<class... Args> iterator emplace_hint(const_iterator position, Args&&... args); ```	```c++ template<class... args=""> iterator emplace_hint(const_iterator position, Args&&... args); ```</class...>
	`position` is a suggestion to where the element should be inserted. This implementation ignores it.	`position` 是一个关于元素应插入位置的建议。此实现会忽略该建议。
	Copy Insert	复制插入
	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。
	try_emplace with Hint	带提示的 try++_++emplace
	As a result of its using open addressing, the interface of `boost::unordered_flat_map` deviates in a number of aspects from that of `boost::unordered_map`/`std::unordered_map`:	由于采用开放寻址法， `boost::unordered++_++flat++_++map` 的接口在多个方面与 `boost::unordered++_++map` / `std::unordered++_++map` 不同：
	An allocator whose value type is the same as the container's value type.	一个分配器，其值类型与容器的值类型相同。
	Allocators using https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[fancy pointers] are supported.	支持使用 https://en.cppreference.com/w/cpp/named_req/Allocator#Fancy_pointers[花式指针^] 的分配器。
	`BOOST_UNORDERED_ENABLE_STATS`	`BOOST++_++UNORDERED++_++ENABLE++_++STATS`
	Convertible to `const_iterator`.	可转换为 `const++_++iterator` 。
	Constructors	构造函数
	```c++ explicit unordered_flat_map(size_type n, const hasher& hf = hasher(), const key_equal& eql = key_equal(), const allocator_type& a = allocator_type()); ```	```c++ explicit unordered_flat_map(size_type n, const hasher& hf = hasher(), const key_equal& eql = key_equal(), const allocator_type& a = allocator_type()); ```
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate and `a` as the allocator, and inserts the elements from `[f, l)` into it.	构造一个至少包含 `n` 个桶的空容器，使用 `hf` 作为哈希函数、 `eql` 作为键相等性谓词、 `a` 作为分配器，并将区间 `++[++f, l)` 中的元素插入其中。
	The move constructor. 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()`.	移动构造函数。`other` 的内部桶数组直接转移到新容器中。哈希函数、谓词和分配器通过移动构造从 `other` 获得。若统计功能已启用（参见 xref:unordered_flat_map_boost_unordered_enable_stats[相关说明]），则转移 `other` 的内部统计信息并调用 `other.reset_stats()`。
	```c++ template<class InputIterator> unordered_flat_map(InputIterator f, InputIterator l, const allocator_type& a); ```	```c++ template<class inputiterator=""> unordered_flat_map(InputIterator f, InputIterator l, const allocator_type& a); ```</class>
	Allocator Constructor	分配器构造函数
	```c++ explicit unordered_flat_map(Allocator const& a); ```	```c++ explicit unordered_flat_map(Allocator const& a); ```
	Constructs an empty container with at least `n` buckets, using `a` as the allocator and default hash function and key equality predicate, and inserts the elements from `[f, l)` into it.	构造一个至少包含 `n` 个桶的空容器，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 `++[++f, l)` 范围内的元素插入其中。
	```c++ unordered_flat_map(std::initializer_list<value_type> il, const allocator_type& a); ```	```c++ unordered_flat_map(std::initializer_list<value_type> il, const allocator_type& a); ```</value_type>
	Constructs an empty container with at least `n` buckets, using `a` and default hash function and key equality predicate, and inserts the elements from `il` into it.	构造一个至少包含 `n` 个桶的空容器，使用 `a` 作为分配器以及默认的哈希函数和键相等谓词，并将 `il` 中的元素插入其中。
	initializer_list Constructor with Bucket Count and Hasher and Allocator	带桶数、哈希函数和分配器的初始化列表构造函数
	```c++ unordered_flat_map(std::initializer_list<value_type> il, size_type n, const hasher& hf, const allocator_type& a); ```	```c++ unordered_flat_map(std::initializer_list<value_type> il, size_type n, const hasher& hf, const allocator_type& a); ```</value_type>
	empty	空
	```c++ [[nodiscard]] bool empty() const noexcept; ```	```c++ [[nodiscard]] bool empty() const noexcept; ```
	Returns:;; `size() == 0`	返回: `size() == 0`
	size	大小
	max_size	max++_++size
	```c++ size_type max_size() const noexcept; ```	```c++ size_type max_size() const noexcept; ```

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Chinese (Simplified Han script) 255 characters editedCurrent translationState: Translated

The move constructor. The internal bucket array of òther` is transferred directly to the new container. The hash function, predicate and allocator are moved-constructed from òther`. If statistics are xref:unordered_flat_map_boost_unordered_enable_stats[enabled], transfers the internal statistical information from òther` and calls移动构造函数。òther` 的内部桶数组直接转移到新容器中。哈希函数、谓词和分配器通过移动构造从 òther` 获得。若统计功能已启用（参见 xref:unordered_flat_map_boost_unordered_enable_stats[相关说明]），则转移 òther` 的内部统计信息并调用 òther.reset_stats()`.。

06/05/2026

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Chinese (Simplified Han script) 357 characters editedPrevious translationState: Needs editing (Needs rewriting)

06/05/2026

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doc/modules/ROOT/pages/reference/unordered_flat_map_zh_Hans.adoc, string 60

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