reverse_iterator::operator++

Increments the reverse_iterator to the previous element.

reverse_iterator<RandomIterator>& operator++( );
reverse_iterator<RandomIterator> operator++( int );

Return Value

The first operator returns the preincremented reverse_iterator and the second, the postincrement operator, returns a copy of the incremented reverse_iterator.

Remarks

This member function may only be used if the reverse_iterator satisfies the requirements for a bidirectional iterator.

Example

// reverse_iterator_op_incr.cpp
// compile with: /EHsc
#include <iterator>
#include <vector>
#include <iostream>

int main( )
{
   using namespace std;
   int i;

   vector<int> vec;
   for ( i = 1 ; i < 6 ; ++i )  
   {
      vec.push_back ( 2 * i - 1 );
   }
   
   vector <int>::iterator vIter;
   cout << "The vector vec is: ( ";
   for ( vIter = vec.begin( ) ; vIter != vec.end( ); vIter++)
      cout << *vIter << " ";
   cout << ")." << endl;

   vector <int>::reverse_iterator rvIter;
   cout << "The vector vec reversed is: ( ";
   for ( rvIter = vec.rbegin( ) ; rvIter != vec.rend( ); rvIter++)
      cout << *rvIter << " ";
   cout << ")." << endl;

   // Initializing reverse_iterators to the last element
   vector <int>::reverse_iterator rVPOS1 = vec.rbegin( );
   
   cout << "The iterator rVPOS1 initially points to the first "
        << "element\n in the reversed sequence: "
        << *rVPOS1 << "." << endl;

   rVPOS1++;  // postincrement, preincrement: ++rVPSO1

   cout << "After incrementing, the iterator rVPOS1 points\n"
        << " to the second element in the reversed sequence: "
        << *rVPOS1 << "." << endl;
}

The vector vec is: ( 1 3 5 7 9 ).
The vector vec reversed is: ( 9 7 5 3 1 ).
The iterator rVPOS1 initially points to the first element
 in the reversed sequence: 9.
After incrementing, the iterator rVPOS1 points
 to the second element in the reversed sequence: 7.

Requirements

Header: <iterator>

Namespace: std

See Also

Reference

reverse_iterator Class

Standard Template Library