From: "Gennadiy Rozental"

BTW, you may consider CycleIteratorAdaptor or JoiningIteratorAdaptor. They both really simple and illustrative.

No simpler than the transform adaptor, though? As I've repeatedly posted, I think any introductory example ought to build a simple iterator, not an adaptor. -Dave ----------------------------------------------------------- David Abrahams * Boost Consulting dave@boost-consulting.com * http://www.boost-consulting.com