std::uninitialized_copy

 

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Defined in header <memory>
template< class InputIterator, class Size, class ForwardIterator > ForwardIterator uninitialized_copy_n( InputIterator first, Size count,                                       ForwardIterator d_first);		(since C++11)

Copies count elements from a range beginning at first to an uninitialized memory area beginning at d_first. The elements in the uninitialized area are constructed using copy constructor.

Parameters

first	-	the beginning of the range of the elements to copy
d_first	-	the beginning of the destination range

Return value

iterator to the element past the last element copied.

Complexity

linear in count

Possible implementation

template<class InputIterator, class Size, class ForwardIterator> ForwardIterator uninitialized_copy_n(InputIterator first, Size count, ForwardIterator d_first) { typedef typename std::iterator_traits<ForwardIterator>::value_type Value; for (; count > 0; ++first, ++d_first, --count) { ::new (static_cast<void*>(&*d_first)) Value(*first); } return d_first; }

See also

uninitialized_copy	copies a range of objects to an uninitialized area of memory (function template)