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Варианты
Действия

std::set::emplace_hint

Материал из cppreference.com

template <class... Args>
iterator emplace_hint( const_iterator hint, Args&&... args );
(начиная с C++11)
Вставляет новый элемент в контейнер, используя hint как предложение, в котором элемент должен идти. Элемент построен на месте, т.е. не копировать или перемещать операции. The constructor of the element is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....
Original:
Inserts a new element to the container, using hint as a suggestion where the element should go. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....
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No iterators or references are invalidated.

Содержание

[править] Параметры

hint -
итератор, используемый в качестве предложения о том, где, чтобы вставить новый элемент
Original:
iterator, used as a suggestion as to where to insert the new element
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args -
Аргументы направить в конструкторе элемента
Original:
arguments to forward to the constructor of the element
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[править] Возвращаемое значение

Возвращает итератор на вставленный элемент.
Original:
Returns an iterator to the newly inserted element.
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If the insertion failed because the element already exists, returns an iterator to the already existing element with the equivalent key.

[править] Сложность

Logarithmic in the size of the container in general, but amortized constant if the new element is inserted just before hint.

[править] См. также

(C++11)
конструирует элемент "на месте"
(public функция-член) [edit]
вставки элементов
Original:
inserts elements
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(public функция-член) [edit]