std::next

 

C++

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Iterator library

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iterator_traits
input_iterator_tag output_iterator_tag forward_iterator_tag bidirectional_iterator_tag random_access_iterator_tag
iterator
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reverse_iterator
move_iterator (C++11) back_insert_iterator front_insert_iterator insert_iterator	make_move_iterator (C++11) back_inserter front_inserter inserter
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Defined in header <iterator>
template< class ForwardIt > ForwardIt next( ForwardIt it,                 typename std::iterator_traits<ForwardIt>::difference_type n = 1 );		(since C++11)

Return the nth successor of iterator it.

Parameters

it	-	an iterator
n	-	number of elements to advance
Type requirements
- ForwardIt must meet the requirements of ForwardIterator.

Return value

The nth successor of iterator it.

Possible implementation

template<class ForwardIt> ForwardIt next(ForwardIt it, typename std::iterator_traits<ForwardIt>::difference_type n = 1) { std::advance(it, n); return it; }

Example

run this code

#include <iostream>
#include <iterator>
#include <vector>
 
int main() 
{
    std::vector<int> v{ 3, 1, 4 };
 
    auto it = v.begin();
 
    auto nx = std::next(it, 2);
 
    std::cout << *it << ' ' << *nx << '\n';
}

Output:

3 4

See also

prev (C++11)	decrement an iterator (function)
advance	advances an iterator by given distance (function)