[Boost-users] circular_buffer iterators

I have a simple use case for circular_buffer but I need a few advices. There is one producer and one consumer which only inspects elements and circular buffer will only be keeping history of last CB_SIZE elements. As far as I have understood there are two ways to access buffer elements, using indexes and operator[] or using iterators. I have chosen iterators. Since adding elements to buffer can invalidate iterators what is the proper way to check if they are still valid? Is it comparing it to .end() and .begin()? typedef boost::circular_buffer CircularBuffer; CircularBuffer cb(CB_SIZE); CircularBuffer::iterator it = cb.begin(); ... if( it >= cb.begin() && it < cb.end() ){ cout << *it; } Regards, BoskoM.