Tom Bachmann wrote:

I strongly dislike the idea of using something declared in boost::detail, or anything that's not part of the official interface.

Classes defined in boost::detail are _not_ for public use, they are there only for internal use by boost developers. Once all agree that some boost::detail class is a good candidate for truly boost library, someone prepares this class for the fast track review. See http://www.boost.org/more/formal_review_process.htm#Fast-Track and especially the item two "The technique must be already in use in Boost libraries and the new component provides a common implementation". That's probably the fastest route to get it into boost ;-) -- Alexander Nasonov