Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Unordered Flat Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: If `Allocator::select_on_container_copy_construction` exists and has the right signature, the allocator …

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Key	English	Chinese (Simplified Han script)
	Constructs an empty container using `hasher()` as the hash function, `key_equal()` as the key equality predicate and `allocator_type()` as the allocator.	构造一个空容器，使用 `hasher()` 作为哈希函数、 `key++_++equal()` 作为键相等性谓词、以及 `allocator++_++type()` 作为分配器。
:370	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。
:373	---	---
	Bucket Count Constructor	桶数构造函数
	```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.	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	---	---

	English	Chinese (Simplified Han script)	Actions
	A binary function object that induces an equivalence relation on values of type `Key`. It takes two arguments of type `Key` and returns a value of type `bool`.	一个二元函数对象，在 `Key` 类型的值上诱导出等价关系。它接受两个 `Key` 类型的参数并返回 `bool` 类型的值。
	_Allocator_	_Allocator_
	If `link:../../../../../container_hash/doc/html/hash.html#ref_hash_is_avalanchinghash[hash_is_avalanching]<Hash>::value` is `true`, the hash function is used as-is; otherwise, a bit-mixing post-processing stage is added to increase the quality of hashing at the expense of extra computational cost.	若 link:../../../../../container_hash/doc/html/hash.html#ref_hash_is_avalanchinghash[`hash++_++is++_++avalanching`]`++<++Hash++>++::value` 为 `true` ，则直接使用哈希函数；否则，会添加一个位混合后处理阶段以提高哈希质量，但会牺牲额外的计算成本。
	Configuration Macros	配置宏
	Globally define this macro to enable xref:reference/stats.adoc#stats[statistics calculation] for the container. Note that this option decreases the overall performance of many operations.	全局定义此宏，以启用容器的 xref:reference/stats.adoc#stats[统计计算] 功能。请注意，此选项会降低许多操作的总体性能。
	Typedefs	类型定义
	An iterator whose value type is `value_type`.	一种迭代器，其值类型为 `value++_++type` 。
	Default Constructor	默认构造函数
	```c++ unordered_flat_map(); ```	```c++ unordered_flat_map(); ```
	Constructs an empty container using `hasher()` as the hash function, `key_equal()` as the key equality predicate and `allocator_type()` as the allocator.	构造一个空容器，使用 `hasher()` 作为哈希函数、 `key++_++equal()` 作为键相等性谓词、以及 `allocator++_++type()` 作为分配器。
	Bucket Count Constructor	桶数构造函数
	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.	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。
	Iterator Range Constructor	迭代器范围构造函数
	```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。
	Move Constructor	移动构造函数
	```c++ unordered_flat_map(unordered_flat_map&& other); ```	```c++ unordered_flat_map(unordered_flat_map&& other); ```
	Iterator Range Constructor with Allocator	带分配器的迭代器范围构造函数
	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。
	Constructs an empty container, using allocator `a`.	使用分配器 a 构造一个空容器。
	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`。
	Move Constructor with Allocator	带分配器的移动构造函数
	```c++ unordered_flat_map(unordered_flat_map&& other, Allocator const& a); ```	```c++ unordered_flat_map(unordered_flat_map&& other, Allocator const& a); ```
	Move Constructor from concurrent_flat_map	从 concurrent++_++flat++_++map 的移动构造函数
	```c++ unordered_flat_map(concurrent_flat_map<Key, T, Hash, Pred, Allocator>&& other); ```	```c++ unordered_flat_map(concurrent_flat_map<key, t,="" hash,="" pred,="" allocator="">&& other); ```</key,>
	Complexity:;; Constant time. Concurrency:;; Blocking on `other`.	复杂度：常数时间。并发：阻塞 `other`。
	Initializer List Constructor	初始化列表构造函数
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, `eql` as the key equality predicate and `a`, 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 `hf` 作为哈希函数、 `eql` 作为键相等性谓词、以及 `a` 作为分配器，并将 `il` 中的元素插入其中。

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Chinese (Simplified Han script) 103 characters editedCurrent translationState: Translated

06/05/2026

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Chinese (Simplified Han script) 140 characters editedPrevious translationState: Needs editing (Needs rewriting)

06/05/2026

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