boost_1_45_0/libs/regex/doc/headers.qbk

[/ 
  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).
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[section:headers Headers]

There are two main headers used by this library: `<boost/regex.hpp>` 
provides full access to the main template library, while `<boost/cregex.hpp>` 
provides access to the (deprecated) high level class RegEx, and the 
POSIX API functions.

There is also a header containing only forward declarations 
`<boost/regex_fwd.hpp>` for use when an interface is dependent upon 
[basic_regex], but otherwise does not need the full definitions.

[endsect]