std::vector::emplace

 

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std::vector

成员函数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

vector::vector

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元素的访问 Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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迭代器 Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

vector::begin vector::cbegin （C++11）

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容量 Original: Capacity The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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修饰符 Original: Modifiers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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template< class... Args > iterator emplace( const_iterator pos, Args&&... args );		（C++11 起）

插入一个新的元素到容器之前，直接pos。该元件是构成在就地，即没有复制或移动操作进行。元素的构造函数调用的参数std::forward<Args>(args)...。元素类型必须是EmplaceConstructible, MoveInsertable and MoveAssignable.

Original:

Inserts a new element into the container directly before pos. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element is called with the arguments std::forward<Args>(args).... The element type must be EmplaceConstructible, MoveInsertable and MoveAssignable.

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If the new size() is greater than capacity(), all iterators and references are invalidated. Otherwise, only the iterators and references after the added element are invalidated.

参数

pos	-	迭代器之前，将兴建新的元素 Original: iterator before which the new element will be constructed The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
args	-	元素的构造函数的参数转发 Original: arguments to forward to the constructor of the element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

返回值

布设元素的迭代器，指向.

Original:

Iterator pointing to the emplaced element.

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复杂性

Linear in the distance between pos and end of the container.

例外

如果抛出一个异常（例如，通过构造函数），容器保持不变，如果这个功能是永远不会被调用（强异常保证）.

Original:

If an exception is thrown (e.g. by the constructor), the container is left unmodified, as if this function was never called (strong exception guarantee).

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另请参阅

insert	插入元素 Original: inserts elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共成员函数）