A tool for creating scanners (text pattern recognizers)
The flex program generates scanners. Scanners are programs which can
recognize lexical patterns in text. Flex takes pairs of regular
expressions and C code as input and generates a C source file as
output. The output file is compiled and linked with a library to
produce an executable. The executable searches through its input for
occurrences of the regular expressions. When a match is found, it
executes the corresponding C code. Flex was designed to work with
both Yacc and Bison, and is used by many programs as part of their
You should install flex if you are going to use your system for
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:
Bug reports should be submitted using the SourceForge Bug Tracker
facilities which can be found from flex's SourceForge project page
This is the file NEWS for the flex package. It records user -visible
changes between releases of flex.
See the file COPYING for copying conditions.
* version 2.5.35 released 2008-02-26
** fixed bug that prevented flex from accepting certain comments in the
scanner file (resolves bugs #1849809 and #1849805)
** fix bug that prevented headers for all functions from being generated
FLEX(1) User Commands FLEX(1)
flex - the fast lexical analyser generator
flex [OPTIONS] [FILE]...
Generates programs that perform pattern-matching on text.
trade off larger tables for better memory alignment
Flex carries the copyright used for BSD software, slightly modified
because it originated at the Law
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