Andrzej Krzemienski wrote:

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Do you mean coupling of Boost.Iterator and Boost.Range? I think that would be fine, since Boost.Range already couples with Boost.Iterator. Boost.Range's `boost::distance` should call Boost.Iterator's `boost::distance`.

I meant `next()` and `prior()` that are located in Utility: http://www.boost.org/doc/libs/1_64_0/libs/utility/utility.htm

Ah ok, got it. I think it would be better to move utility/next_prior.hpp to the Boost.Iterator module. After the move, the Boost.Iterator module will have: - include/boost/iterator/next_prior.hpp * Contains the actual code for `next` and `prior`. (Personally, I'd like to add `boost::prev` as a synonym of `boost::prior`.) - include/boost/utility/next_prior.hpp * Just includes <boost/iterator/next_prior.hpp>. This is how utility/declval.hpp was moved to the Boost.TypeTraits module. Regards, Michel