how to declare volatile iterator in c++

Question

Is there a way to declare an iterator which is a member variable in a class and that can be incremented using a member function even though the object of that class is const.

Answer 1

That would be with the "mutable" keyword.

class X
{
public:
   bool GetFlag() const
   {
      m_accessCount++;
      return m_flag;
   }
private:
   bool m_flag;
   mutable int m_accessCount;
};