Chaining iterators for C++

Question

Python\'s itertools implement a chain iterator which essentially concatenates a number of different iterators to provide everything from single iterator.

Is there so

Answer 1

I've written one before (actually, just to chain two pairs of iterators together). It's not that hard, especially if you use boost's iterator_facade.

Making an input iterator (which is effectively what Python's chain does) is an easy first step. Finding the correct category for an iterator chaining a combination of different iterator categories is left as an exercise for the reader ;-).