This is flex, the fast lexical analyzer generator.

flex is a tool for generating scanners: programs which recognize
lexical patterns in text.

More information about flex as well as the latest official release of
flex can be found at:

http://flex.sourceforge.net/

Bug reports should be submitted using the SourceForge Bug Tracker
facilities which can be found from flex's SourceForge project page at:

http://sourceforge.net/projects/flex

There are several mailing lists available as well:

flex-announce@lists.sourceforge.net - where posts will be made
announcing new releases of flex.

flex-help@lists.sourceforge.net - where you can post questions about
using flex

flex-devel@lists.sourceforge.net - where you can discuss development of
flex itself

Note that flex is distributed under a copyright very similar to that of
BSD Unix, and not under the GNU General Public License (GPL).

This file is part of flex.

This code is derived from software contributed to Berkeley by
Vern Paxson.

The United States Government has rights in this work pursuant
to contract no. DE-AC03-76SF00098 between the United States
Department of Energy and the University of California.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.

THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.

The flex distribution contains the following files which may be of interest:

README - This file.

NEWS - current version number and list of user-visible changes.

INSTALL - basic installation information.

ABOUT-NLS - description of internationalization support in flex.

COPYING - flex's copyright and license.

doc/ - user documentation.

examples/ - containing examples of some possible flex scanners and a
few other things. See the file examples/README for more details.

TODO - outstanding bug reports, desired features, etc.

tests/ - regression tests. See TESTS/README for details.

po/ - internationalization support files.