std::reverse_copy

 

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all_of any_of none_of (C++11) (C++11) (C++11) for_each count count_if mismatch equal	find find_if find_if_not (C++11) find_end find_first_of adjacent_find search search_n
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copy copy_if (C++11) copy_n (C++11) copy_backward move (C++11) move_backward (C++11) fill fill_n transform generate generate_n remove remove_if remove_copy remove_copy_if	replace replace_if replace_copy replace_copy_if swap swap_ranges iter_swap reverse reverse_copy rotate rotate_copy random_shuffle shuffle   (C++11) unique unique_copy
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Defined in header <algorithm>
template< class BidirectionalIterator, class OutputIterator > OutputIterator reverse_copy( BidirectionalIterator first, BidirectionalIterator last, OutputIterator d_first );

Copies the elements from the range [first, last), to another range beginning at d_first in such a way, that the elements in the new range are in reverse order.

Parameters

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

Return value

output iterator to the element past the last element copied.

Possible implementation

template<class BidirectionalIterator, class OutputIterator> OutputIterator reverse_copy(BidirectionalIterator first, BidirectionalIterator last, OutputIterator d_first) { while (first != last) { *(d_first++) = *(--last); } return d_first; }

Example

#include <vector>
#include <iostream>
#include <algorithm>
 
int main()
{
    std::vector<int> v({1,2,3});
    std::for_each(std::begin(v), std::end(v),
                  [&](int value){ std::cout << value << " "; });
    std::cout << std::endl;
 
    std::vector<int> destiny(3);
    std::reverse_copy(std::begin(v), std::end(v), std::begin(destiny));
    std::for_each(std::begin(destiny), std::end(destiny),
                  [&](int value){ std::cout << value << " "; });
    std::cout << std::endl;
}

Output:

1 2 3 
3 2 1

Complexity

linear in the distance between first and last

See also

reverse	reverses the order elements in a range (function template)