[/ Copyright 2006-2007 John Maddock. Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt). ] [section:headers Headers] There are two main headers used by this library: `` provides full access to the main template library, while `` provides access to the (deprecated) high level class RegEx, and the POSIX API functions. There is also a header containing only forward declarations `` for use when an interface is dependent upon [basic_regex], but otherwise does not need the full definitions. [endsect]