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This is flex, the fast lexical analyzer generator.

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

The flex codebase is kept inGit on GitHub. Source releases of flex with some intermediate files already built can be found onthe github releases page.

Use GitHub'sissues andpull request features to file bugsand submit patches.

There are several mailing lists available as well:

• flex-announce@lists.sourceforge.net - where posts will be madeannouncing new releases of flex.
• flex-help@lists.sourceforge.net - where you can post questions aboutusing flex
• flex-devel@lists.sourceforge.net - where you can discuss developmentof flex itself

Find information on subscribing to the mailing lists or search in thearchive at:https://sourceforge.net/p/flex/mailman/Note: Posting is only allowed from addresses that are subscribed tothe lists.

The flex distribution contains the following files which may be ofinterest:

• README.md - This file.
• NEWS - current version number and list of user-visible changes.
• INSTALL.md - 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 afew other things. See the file examples/README for moredetails.
• tests/ - regression tests. See tests/README for details.
• po/ - internationalization support files.

This file is part of flex.

This code is derived from software contributed to Berkeley byVern Paxson.

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

Redistribution and use in source and binary forms, with or withoutmodification, are permitted provided that the following conditionsare met:

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

Neither the name of the University nor the names of its contributorsmay be used to endorse or promote products derived from this softwarewithout specific prior written permission.

THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS ORIMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIEDWARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULARPURPOSE.