flex
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Flex (fast lexical analyzer generator) is a free and open-source software
alternative to lex. It is a computer program that generates lexical analyzers
(also known as "scanners" or "lexers"). It is frequently used as the lex
implementation together with Berkeley Yacc parser generator on BSD-derived
operating systems (as both lex and yacc are part of POSIX), or together with GNU
bison (a version of yacc) in *BSD ports and in Linux distributions. Unlike
Bison, flex is not part of the GNU Project and is not released under the GNU
General Public License, although a manual for Flex was produced and published by
the Free Software Foundation. [0]



[000] Index
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* Installation ........................................................... [001]
* Usage .................................................................. [002]
* References ............................................................. [003]


[001] Installation
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+------------------------------------------------------------------------------+
|                                                                              |
|  $ kiss b flex                                                               |
|                                                                              |
+------------------------------------------------------------------------------+


[003] Usage
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Refer to the manual pages and command help output.


[005] References
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[0] https://en.wikipedia.org/wiki/Flex_(lexical_analyser_generator)