Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Unordered Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; If …

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Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; 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:;; The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key. + + Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated. + + 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. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.

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Key	English	Chinese (Simplified Han script)
:754	---	---
	max_size	max_size
	```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()`。
:765	---	---
	Modifiers	修改器
	emplace	原地构造
	```c++ template<class... Args> std::pair<iterator, bool> emplace(Args&&... args); ```	```c++ template<class... args=""> std::pair<iterator, bool=""> emplace(Args&&... args); ```</iterator,></class...>
:774	Inserts an object, constructed with the arguments `args`, 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具有等价键的元素时，才插入一个使用参数 `args` 构造的对象。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` 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, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated. + + 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. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.	要求：`value_type` 必须可以从 `args` 出发在 `X` 中进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^]。返回：如果发生了插入，则返回类型的 bool 分量为 true。如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。指向元素的指针和引用永远不会失效。如果 `args...` 的形式为 `k,v`，则该函数会延迟构造整个对象，直到确定应该插入元素为止，仅使用 `k` 参数进行检查。当映射的 `key_type` 可移动构造或 `k` 参数本身就是 `key_type` 类型时，此优化生效。
:788	---	---
	emplace_hint	emplace_hint
	```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...>
:795	Inserts an object, constructed with the arguments `args`, 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具有等价键的元素时，才插入一个使用参数 `args` 构造的对象。
	`position` is a suggestion to where the element should be inserted.	`position` 是关于元素插入位置的建议。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; 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:;; The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key. + + Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated. + + 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. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.	要求：`value_type` 必须可以从 `args` 出发在 `X` 中进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^]。返回：如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：标准关于 `hint` 的含义表述相当模糊。但唯一实际的使用方式，也是 Boost.Unordered 支持的唯一方式，是将其指向一个具有相同键的已存在元素。可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。指向元素的指针和引用永远不会失效。如果 `args...` 的形式为 `k,v`，则该函数会延迟构造整个对象，直到确定应该插入元素为止，仅使用 `k` 参数进行检查。当映射的 `key_type` 可移动构造或 `k` 参数本身就是 `key_type` 类型时，此优化生效。
:811	---	---
	Copy Insert	复制插入
	```c++ std::pair<iterator, bool> insert(const value_type& obj); ```	```c++ std::pair<iterator, bool=""> insert(const value_type& obj); ```</iterator,>
:818	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具有等价键的元素时，才将 `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, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	要求：`value_type` 满足 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[可拷贝插入^]。返回：返回类型的 bool 分量为 true 表示发生了插入。如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。指向元素的指针和引用永远不会失效。
:830	---	---
	Move Insert	移动插入
	```c++ std::pair<iterator, bool> insert(value_type&& obj); ```	```c++ std::pair<iterator, bool=""> insert(value_type&& obj); ```</iterator,>
:837	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具有等价键的元素时，才将 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, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	要求：`value_type` 满足 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[可移动插入^]。返回：返回类型的 bool 分量为 true 表示发生了插入。如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。指向元素的指针和引用永远不会失效。
:849	---	---
	Emplace Insert	原地插入
	```c++ template<class P> std::pair<iterator, bool> insert(P&& obj); ```	```c++ template<class p=""> std::pair<iterator, bool=""> insert(P&& obj); ```</iterator,></class>
	Inserts an element into the container by performing `emplace(std::forward<P>(value))`.	通过执行 `emplace(std::forward<p>(value))` 向容器中插入一个元素。</p>
:858	Only participates in overload resolution if `std::is_constructible<value_type, P&&>::value` is `true`.	仅当 std::is_constructible<value_type, p&&="">::value 为 true 时参与重载决议。</value_type,>

	English	Chinese (Simplified Han script)	Actions
	Move Constructor	移动构造函数
	```c++ unordered_map(unordered_map&& other); ```	```c++ unordered_map(unordered_map&& other); ```
	The move constructor.	移动构造函数。
	Notes:;; This is implemented using Boost.Move. Requires:;; `value_type` is move-constructible.	注意：此函数使用 Boost.Move 实现。要求：`value_type` 可移动构造。
	```c++ template<class InputIterator> unordered_map(InputIterator f, InputIterator l, const allocator_type& a); ```	```c++ template<class inputiterator=""> unordered_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 a maximum load factor of `1.0` and inserts the elements from `[f, l)` into it.	使用 `a` 作为分配器，以默认哈希函数、默认键相等谓词和最大负载因子 `1.0` 构造一个空容器，并将 `[f, l)` 范围内的元素插入其中。
	Copy Constructor with Allocator	带分配器的复制构造函数
	```c++ unordered_map(unordered_map const& other, Allocator const& a); ```	```c++ unordered_map(unordered_map const& other, Allocator const& a); ```
	```c++ unordered_map(unordered_map&& other, Allocator const& a); ```	```c++ unordered_map(unordered_map&& other, Allocator const& a); ```
	Construct a container moving ``other``'s contained elements, and having the hash function, predicate and maximum load factor, but using allocate `a`.	构造一个容器，移动 other 所包含的元素，并使用其哈希函数、谓词和最大负载因子，但使用分配器 a。
	Notes:;; This is implemented using Boost.Move. Requires:;; `value_type` is move insertable.	注意：此函数使用 Boost.Move 实现。要求：`value_type` 可移动插入。
	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, `a` as the allocator, with the default key equality predicate and a maximum load factor of `1.0` 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，`a` 作为分配器，使用默认的键相等谓词，以及最大负载因子 `1.0`，并将 `[f, l)` 范围内的元素插入其中。
	initializer_list Constructor with Bucket Count and Allocator	带桶数和分配器的初始化列表构造函数
	Constructs an empty container with at least `n` buckets, using `a` as the allocator and a maximum load factor of 1.0 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，最大负载因子为 `1.0`，并将 `il` 中的元素插入其中。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from `args`. Returns:;; 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:;; The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key. + + Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated. + + 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. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.	要求：`value_type` 必须可以从 `args` 出发在 `X` 中进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[可原位构造^]。返回：如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：标准关于 `hint` 的含义表述相当模糊。但唯一实际的使用方式，也是 Boost.Unordered 支持的唯一方式，是将其指向一个具有相同键的已存在元素。可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。指向元素的指针和引用永远不会失效。如果 `args...` 的形式为 `k,v`，则该函数会延迟构造整个对象，直到确定应该插入元素为止，仅使用 `k` 参数进行检查。当映射的 `key_type` 可移动构造或 `k` 参数本身就是 `key_type` 类型时，此优化生效。
	```c++ std::pair<iterator, bool> insert(const value_type& obj); ```	```c++ std::pair<iterator, bool=""> insert(const value_type& obj); ```</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, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated.	要求：`value_type` 满足 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[可拷贝插入^]。返回：返回类型的 bool 分量为 true 表示发生了插入。如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。注意：可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。指向元素的指针和引用永远不会失效。
	Move Insert	移动插入
	Emplace Insert with Hint	带提示的原地插入
	```c++ template<class P> iterator insert(const_iterator hint, P&& obj); ```	```c++ template<class p=""> iterator insert(const_iterator hint, P&& obj); ```</class>
	Inserts an element into the container by performing `emplace_hint(hint, std::forward<P>(value))`.	通过执行 `emplace_hint(hint, std::forward<p>(value))` 向容器中插入一个元素。</p>
	```c++ template<class InputIterator> void insert(InputIterator first, InputIterator last); ```	```c++ template<class inputiterator=""> void insert(InputIterator first, InputIterator last); ```</class>
	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>
	```c++ template<class... Args> std::pair<iterator, bool> try_emplace(const key_type& k, Args&&... args); template<class... Args> std::pair<iterator, bool> try_emplace(key_type&& k, Args&&... args); template<class K, class... Args> std::pair<iterator, bool> try_emplace(K&& k, Args&&... args) ```	```c++ template<class... args=""> std::pair<iterator, bool=""> try_emplace(const key_type& k, Args&&... args); template<class... args=""> std::pair<iterator, bool=""> try_emplace(key_type&& k, Args&&... args); template<class k,="" class...="" args=""> std::pair<iterator, bool=""> try_emplace(K&& k, Args&&... args) ```</iterator,></class></iterator,></class...></iterator,></class...>
	instead of xref:#unordered_map_emplace[emplace] which simply forwards all arguments to ``value_type``'s constructor.	而不是像 xref:#unordered_map_emplace[emplace] 那样简单地将所有参数转发给 `value_type` 的构造函数。
	```c++ template<class... Args> iterator try_emplace(const_iterator hint, const key_type& k, Args&&... args); template<class... Args> iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args); template<class K, class... Args> iterator try_emplace(const_iterator hint, K&& k, Args&&... args); ```	```c++ template<class... args=""> iterator try_emplace(const_iterator hint, const key_type& k, Args&&... args); template<class... args=""> iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args); template<class k,="" class...="" args=""> iterator try_emplace(const_iterator hint, K&& k, Args&&... args); ```</class></class...></class...>
	The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key.	标准关于 `hint` 的含义表述相当模糊。但唯一实际的使用方式，也是 Boost.Unordered 支持的唯一方式，是将其指向一个具有相同键的已存在元素。
	```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>

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Chinese (Simplified Han script) 936 characters editedCurrent translationState: Translated

~~Requires:;;~~ 要求：`value_type` is必须可以从 àrgs` 出发在 `X` 中进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] into `X` from àrgs`. Returns:;; 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:;; The standard is fairly vague on the meaning of the hint. But the only practical way to use it, and the only way that Boost.Unordered supports is to point to an existing element with the same key. + + Can invalidate iterators, but only if the insert causes the load factor to be greater to or equal to the maximum load factor. + + Pointers and references to elements are never invalidated. + + If àrgs...` 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. This optimization happens when the map's `key_type` is move constructible or when the `k` argument is a `key_type`.可原位构造^]。返回：如果发生了插入，则迭代器指向新插入的元素；否则，指向具有等价键的元素。
抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。
注意：标准关于 `hint` 的含义表述相当模糊。但唯一实际的使用方式，也是 Boost.Unordered 支持的唯一方式，是将其指向一个具有相同键的已存在元素。
可能使迭代器失效，但仅当插入导致负载因子大于或等于最大负载因子时才会发生。
指向元素的指针和引用永远不会失效。
如果 àrgs...` 的形式为 `k,v`，则该函数会延迟构造整个对象，直到确定应该插入元素为止，仅使用 `k` 参数进行检查。当映射的 `key_type` 可移动构造或 `k` 参数本身就是 `key_type` 类型时，此优化生效。

06/05/2026

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Translation

Things to check

Double space

Mismatching line breaks

Glossary

String information

Flags

Details

Unit identifier

Source string location

String age

Last updated

Source string age

Translation file AsciiDoc file