AMDG Hicham Mouline wrote:

I have a boost::array< pair, maxsize > object, and I wish to iterate over the list of type1 elements, and the list of type2 elements...

I gather I then need an iterator adaptor based on array's iterator and const_iterators... How may I write such a thing?

I then can pass around iterators to type1 and type2 separately.

transform_iterator might be useful. I don't know off the top of my head whether there is a more specialized iterator adaptor in Boost somewhere. In Christ, Steven Watanabe