public member function
std::operator+=
<iterator>
reverse_iterator& operator+= (difference_type n);
Advance iterator
Advances the
reverse iterator by
n element positions.
This in fact retrocedes by that same amount of element positions the
base iterator kept internally.
Parameters
- n
- Number of elements to step over forwards.
difference_type is a member type defined as an alias of the base iterator's own difference type (generally, a integral type).
Return value
The reverse iterator itself (
*this).
Example
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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// reverse_iterator::operator+ example
#include <iostream>
#include <iterator>
#include <vector>
using namespace std;
int main () {
vector<int> myvector;
for (int i=0; i<10; i++) myvector.push_back(i); // myvector: 0 1 2 3 4 5 6 7 8 9
typedef vector<int>::iterator iter_int;
reverse_iterator<iter_int> rev_iterator = myvector.rbegin();
rev_iterator += 3;
cout << "The fourth element from the end is : " << *rev_iterator << endl;
return 0;
}
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Output:
The fourth element from the end is : 6
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See also
- operator-=
- Retrocede iterator (public member function)
- operator++
- Increment iterator position (public member function)
- operator+
- Addition operator (public member function)