#include <boost/iterator/counting_iterator.hpp>                                  
#include <boost/iterator/transform_iterator.hpp>                                 
                                                                                 
double f(int i) { return i; }                                                    
                                                                                 
int main() {                                                                     
  auto i = boost::make_transform_iterator(boost::make_counting_iterator(3), f);  
  std::next(i);                                                                  
  return 0;                                                                      
}