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:;; The …

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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`.

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Key	English	Chinese (Simplified Han script)
	```c++ [[nodiscard]] bool empty() const noexcept; ```	```c++ [[nodiscard]] bool empty() const noexcept; ```
	Returns:;; `size() == 0`	返回：`size() == 0`。
:743	---	---
	size	大小
	```c++ size_type size() const noexcept; ```	```c++ size_type size() const noexcept; ```
	Returns:;; `std::distance(begin(), end())`	返回：`std::distance(begin(), end())`。
: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。

	English	Chinese (Simplified Han script)	Actions
	Effects:;; `x.swap(y)` Throws:;; Doesn't throw an exception unless it is thrown by the copy constructor or copy assignment operator of `key_equal` or `hasher`. Notes:;; The exception specifications aren't quite the same as the C++11 standard, as the equality predicate and hash function are swapped using their copy constructors.	效果：;; `x.swap(y)` 抛出：;; 除非由 `key_equal` 或 `hasher` 的复制构造函数或复制赋值运算符抛出异常，否则不会抛出异常。备注：;; 异常规范与 C++11 标准不完全相同，因为相等谓词和哈希函数是通过它们的复制构造函数进行交换的。
	Saves all the elements of an `unordered_map` `x` to an archive (XML archive) `ar`.	将 `unordered_map` `x` 的所有元素保存到归档（XML 归档）`ar` 中。
	Deletes all preexisting elements of an `unordered_map` `x` and inserts from an archive (XML archive) `ar` restored copies of the elements of the original `unordered_map` `other` saved to the storage read by `ar`.	删除 `unordered_map` `x` 中所有已存在的元素，并从归档（XML 归档）`ar` 中插入由 `ar` 所读取存储中保存的原始 `unordered_map` `other` 元素的恢复副本。
	Constructs an empty container with at least `n` buckets, using `hf` as the hash function, the default key equality predicate, `a` as the allocator and a maximum load factor of `1.0`.	构造一个至少包含 n 个桶的空容器，使用 hf 作为哈希函数，使用默认的键相等谓词，a 作为分配器，以及最大负载因子 1.0。
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^] from `(std::remove_const<key_type>::type&&, std::remove_const<mapped_type>::type&&)`. `x.key_equal()` is functionally equivalent to `other.key_equal()`. Note:;; If the archive was saved using a release of Boost prior to Boost 1.84, the configuration macro `BOOST_UNORDERED_ENABLE_SERIALIZATION_COMPATIBILITY_V0` has to be globally defined for this operation to succeed; otherwise, an exception is thrown.	要求：;; `value_type` 可以从 `(std::remove_const<key_type>::type&&, std::remove_const<mapped_type>::type&&)` 进行 https://en.cppreference.com/w/cpp/named_req/EmplaceConstructible[EmplaceConstructible^]。`x.key_equal()` 在功能上等价于 `other.key_equal()`。注意：;; 如果归档是使用 Boost 1.84 之前的 Boost 版本保存的，则必须全局定义配置宏 `BOOST_UNORDERED_ENABLE_SERIALIZATION_COMPATIBILITY_V0` 才能使此操作成功；否则将抛出异常。</mapped_type></key_type>
	Requires:;; The `unordered_map` `x` pointed to by `it` has been previously saved to `ar`, and no modifying operations have been issued on `x` between saving of `x` and saving of `it`.	要求：;; `it` 所指向的 `unordered_map` `x` 此前已保存至 `ar`，并且在保存 `x` 和保存 `it` 之间未对 `x` 执行任何修改操作。
	initializer_list Constructor with Allocator	带分配器的初始化列表构造函数
	Constructs an empty container using `a` as the allocator and a maximum load factor of 1.0 and inserts the elements from `il` into it.	使用 a 作为分配器，最大负载因子为 1.0，构造一个空容器，并将 il 中的元素插入其中。
	```c++ unordered_map& operator=(unordered_map const& other); ```	```c++ unordered_map& operator=(unordered_map const& other); ```
	```c++ iterator end() noexcept; const_iterator end() const noexcept; ```	```c++ iterator end() noexcept; const_iterator end() const noexcept; ```
	Returns:;; An iterator which refers to the past-the-end value for the container.	返回：指向容器尾后值的迭代器。
	```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.	返回：指向容器第一个元素的 `const_iterator`，如果容器为空则返回容器的尾后值。
	__iter-mapped-type__	__iter-mapped-type__
	```c++ size_type size() const noexcept; ```	```c++ size_type size() const noexcept; ```
	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。
	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...>
	`position` is a suggestion to where the element should be inserted.	`position` 是关于元素插入位置的建议。
	Copy Insert	复制插入
	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。
	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>
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/CopyInsertable[CopyInsertable^]. 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.	要求：`value_type` 满足 https://en.cppreference.com/w/cpp/named_req/CopyInsertable[可拷贝插入^]。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。
	Move Insert with Hint	带提示的移动插入
	```c++ iterator insert(const_iterator hint, value_type&& obj); ```	```c++ iterator insert(const_iterator hint, value_type&& obj); ```
	Requires:;; `value_type` is https://en.cppreference.com/w/cpp/named_req/MoveInsertable[MoveInsertable^]. 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.	要求：`value_type` 满足 https://en.cppreference.com/w/cpp/named_req/MoveInsertable[可移动插入^]。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。
	Returns:;; If an insert took place, then the iterator points to the newly inserted element. Otherwise, it points to the element with equivalent key. 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.	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。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。
	Insert Iterator Range	迭代器范围插入

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Chinese (Simplified Han script) 823 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:;; 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 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 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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Chinese (Simplified Han script) 958 characters editedPrevious translationState: Needs editing (Needs rewriting)

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`Ctrl` + `U` or `Cmd` + `U`	Focus on comment editor.
`Ctrl` + `M` or `Cmd` + `M`	Shows Automatic suggestions tab.
`Ctrl` + `1` to `Ctrl` + `9` or `Cmd` + `1` to `Cmd` + `9`	Copies placeable of a given number from source string.
`Ctrl` + `M` followed by `1` to `9` or `Cmd` + `M` followed by `1` to `9`	Copy the machine translation of a given number to current translation.
`Ctrl` + `I` followed by `1` to `9` or `Cmd` + `I` followed by `1` to `9`	Ignore one item in the list of failing checks.
`Ctrl` + `J` or `Cmd` + `J`	Shows the Nearby strings tab.
`Ctrl` + `S` or `Cmd` + `S`	Focus on search field.
`Ctrl` + `O` or `Cmd` + `O`	Copy the source string.
`Ctrl` + `Y` or `Cmd` + `Y`	Toggle the Needs editing checkbox.
`→`	Browse the next translation string.
`←`	Browse the previous translation string.

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