1.. Copyright David Abrahams 2006. Distributed under the Boost 2.. Software License, Version 1.0. (See accompanying 3.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 4 5``iterator_facade`` is a base class template that implements the 6interface of standard iterators in terms of a few core functions 7and associated types, to be supplied by a derived iterator class. 8 9