Is there a standard cyclic iterator in C++

Question

Based on the following question: Check if one string is a rotation of other string

I was thinking of making a cyclic iterator type that takes a range, and would be a

Answer 1

The CGAL library defines Circulators. They are used like this.

template 
bool contains(Circulator c, Circulator d, const T& value) { 
  if (c != 0) { 
    do { 
      if (*c == value) 
        return true; 
    } while (++c != d); 
  } 
  return false; 
} 

Note that they look like iterators at first glance but note that the logic (and the structure of the loop) is different than for iterators). if(not empty) do{..}while() instead of while(){...}.