Boost Unordered Translation (zh_Hans)/Doc / Modules / Root / Pages / Reference / Unordered Map (adoc) — Chinese (Simplified Han script) @ Boost-Weblate: ---

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:1108	If there is no such element, it is added to the container as: ```c++	向容器中插入新元素，或通过赋值给已存在的元素值来更新该元素。
:1111	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<Key>(k)), std::forward_as_tuple(std::forward<M>(obj)))	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<key>(k)), std::forward_as_tuple(std::forward<m>(obj)))</m></key>
:1116	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<M>(obj))) ```	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<k>(k)), std::forward_as_tuple(std::forward<m>(obj))) ```</m></k>
:1121	`hint` is a suggestion to where the element should be inserted.	`hint` 是关于元素插入位置的建议。
	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. + + 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：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。 `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` 可同时使用 `K` 和 `Key` 调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型对象的开销。</class>
:1134	---	---
	Extract by Iterator	通过迭代器提取
	```c++ node_type extract(const_iterator position); ```	```c++ node_type extract(const_iterator position); ```
	Removes the element pointed to by `position`.	移除 `position` 所指向的元素。
	Returns:;; A `node_type` owning the element. Notes:;; A node extracted using this method can be inserted into a compatible `unordered_multimap`.	返回：一个拥有该元素的 `node_type`。注意：通过此方法提取的节点可以插入到兼容的 `unordered_multimap` 中。
:1147	---	---
	Extract by Key	通过键提取
	```c++ node_type extract(const key_type& k); template<class K> node_type extract(K&& k); ```	```c++ node_type extract(const key_type& k); template<class k=""> node_type extract(K&& k); ```</class>
	Removes an element with key equivalent to `k`.	移除一个键与 `k` 等价的元素。
	Returns:;; A `node_type` owning the element if found, otherwise an empty `node_type`. Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. Notes:;; A node extracted using this method can be inserted into a compatible `unordered_multimap`. + + The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs and neither `iterator` nor `const_iterator` are implicitly convertible from `K`. 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：如果找到该元素，则返回一个拥有该元素的 `node_type`；否则返回一个空的 `node_type`。抛出：仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。注意：通过此方法提取的节点可以插入到兼容的 `unordered_multimap` 中。 `template<class k="">` 重载仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef，且 `iterator` 和 `const_iterator` 都不能从 `K` 隐式转换时参与重载决议。库假定 `Hash` 可同时使用 `K` 和 `Key` 调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型对象的开销。</class>
:1164	---	---
	Insert with `node_handle`	通过 `node_handle` 插入
	```c++ insert_return_type insert(node_type&& nh); ```	```c++ insert_return_type insert(node_type&& nh); ```
:1171	If `nh` is empty, has no effect.	如果 `nh` 为空，则无效果。
:1173	Otherwise inserts the element owned by `nh` if and only if there is no element in the container with an equivalent key.	否则，当且仅当容器中没有具有等价键的元素时，才插入 `nh` 所拥有的元素。
	Requires:;; `nh` is empty or `nh.get_allocator()` is equal to the container's allocator. Returns:;; If `nh` was empty, returns an `insert_return_type` with: `inserted` equal to `false`, `position` equal to `end()` and `node` empty. + + Otherwise if there was already an element with an equivalent key, returns an `insert_return_type` with: `inserted` equal to `false`, `position` pointing to a matching element and `node` contains the node from `nh`. + + Otherwise if the insertion succeeded, returns an `insert_return_type` with: `inserted` equal to `true`, `position` pointing to the newly inserted element and `node` empty. 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. + + This can be used to insert a node extracted from a compatible `unordered_multimap`.	要求：`nh` 为空或 `nh.get_allocator()` 等于容器的分配器。返回：如果 `nh` 为空，则返回一个 `insert_return_type`，其中 `inserted` 为 `false`，`position` 等于 `end()`，`node` 为空。否则如果已存在具有等价键的元素，则返回一个 `insert_return_type`，其中 `inserted` 为 `false`，`position` 指向匹配的元素，`node` 包含 `nh` 中的节点。否则如果插入成功，则返回一个 `insert_return_type`，其中 `inserted` 为 `true`，`position` 指向新插入的元素，`node` 为空。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。此函数可用于插入从兼容的 `unordered_multimap` 中提取的节点。
:1189	---	---
	Insert with Hint and `node_handle`	带提示和 `node_handle` 的插入
	```c++ iterator insert(const_iterator hint, node_type&& nh); ```	```c++ iterator insert(const_iterator hint, node_type&& nh); ```
:1196	If `nh` is empty, has no effect.	如果 `nh` 为空，则无效果。
:1198	Otherwise inserts the element owned by `nh` if and only if there is no element in the container with an equivalent key.	否则，当且仅当容器中没有具有等价键的元素时，才插入 `nh` 所拥有的元素。
	If there is already an element in the container with an equivalent key has no effect on `nh` (i.e. `nh` still contains the node.)	如果容器中已存在具有等价键的元素，则对 `nh` 无影响（即 `nh` 仍然包含该节点）。
:1202	`hint` is a suggestion to where the element should be inserted.	`hint` 是关于元素插入位置的建议。
	Requires:;; `nh` is empty or `nh.get_allocator()` is equal to the container's allocator. Returns:;; If `nh` was empty returns `end()`. + + If there was already an element in the container with an equivalent key returns an iterator pointing to that. + + Otherwise returns an iterator pointing to the newly inserted element. 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. + + This can be used to insert a node extracted from a compatible `unordered_multimap`.	要求：`nh` 为空或 `nh.get_allocator()` 等于容器的分配器。返回：如果 `nh` 为空，则返回 `end()`。如果容器中已存在具有等价键的元素，则返回指向该元素的迭代器。否则返回指向新插入元素的迭代器。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。此函数可用于插入从兼容的 `unordered_multimap` 中提取的节点。
:1220	---	---
	Erase by Position	通过位置擦除

Key	English	Chinese (Simplified Han script)
:1052	---	---
:1064	Inserts a new element into the container or updates an existing one by assigning to the contained value.	向容器中插入一个新元素，或通过赋值更新现有元素的值。
:1066	If there is an element with key `k`, then it is updated by assigning `std::forward<M>(obj)`.	如果存在键为 `k` 的元素，则通过赋值 `std::forward<m>(obj)` 来更新它。</m>
:1068	If there is no such element, it is added to the container as: ```c++	如果不存在这样的元素，则将其添加到容器中，形式为： ```c++
:1071	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<Key>(k)), std::forward_as_tuple(std::forward<M>(obj)))	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<key>(k)), std::forward_as_tuple(std::forward<m>(obj)))</m></key>
:1076	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<M>(obj))) ```	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<k>(k)), std::forward_as_tuple(std::forward<m>(obj))) ```</m></k>
:1092	---	---
:1104	Inserts a new element into the container or updates an existing one by assigning to the contained value.	向容器中插入一个新元素，或通过赋值更新现有元素的值。
:1106	If there is an element with key `k`, then it is updated by assigning `std::forward<M>(obj)`.	如果存在键为 `k` 的元素，则通过赋值 `std::forward<m>(obj)` 来更新它。</m>
:1108	If there is no such element, it is added to the container as: ```c++	向容器中插入新元素，或通过赋值给已存在的元素值来更新该元素。
:1111	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<Key>(k)), std::forward_as_tuple(std::forward<M>(obj)))	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<key>(k)), std::forward_as_tuple(std::forward<m>(obj)))</m></key>
:1116	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<K>(k)), std::forward_as_tuple(std::forward<M>(obj))) ```	value_type(std::piecewise_construct, std::forward_as_tuple(std::forward<k>(k)), std::forward_as_tuple(std::forward<m>(obj))) ```</m></k>
:1121	`hint` is a suggestion to where the element should be inserted.	`hint` 是关于元素插入位置的建议。
:1134	---	---
:1147	---	---
:1164	---	---
:1171	If `nh` is empty, has no effect.	如果 `nh` 为空，则无效果。
:1173	Otherwise inserts the element owned by `nh` if and only if there is no element in the container with an equivalent key.	否则，当且仅当容器中没有具有等价键的元素时，才插入 `nh` 所拥有的元素。
:1189	---	---
:1196	If `nh` is empty, has no effect.	如果 `nh` 为空，则无效果。
:1198	Otherwise inserts the element owned by `nh` if and only if there is no element in the container with an equivalent key.	否则，当且仅当容器中没有具有等价键的元素时，才插入 `nh` 所拥有的元素。
:1202	`hint` is a suggestion to where the element should be inserted.	`hint` 是关于元素插入位置的建议。
:1220	---	---
:1229	Erase the element pointed to by `position`.	擦除 `position` 所指向的元素。
:1236	---	---
:1251	---	---
:1267	---	---
:1274	Erase the element pointed to by `position`.	擦除 `position` 所指向的元素。
:1277	Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. + + In this implementation, this overload doesn't call either function object's methods so it is no throw, but this might not be true in other implementations. Notes:;; This method was implemented because returning an iterator to the next element from erase was expensive, but the container has been redesigned so that is no longer the case. So this method is now deprecated.	抛出：;; 仅当由 `hasher` 或 `key_equal` 抛出异常时才会抛出异常。在此实现中，此重载不会调用任一函数对象的方法，因此不会抛出异常，但在其他实现中可能并非如此。备注：;; 之所以实现此方法，是因为从 `erase` 返回下一个元素的迭代器开销较大，但容器已经过重新设计，情况不再如此。因此，此方法现已废弃。
:1282	---	---

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