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 FLEX(1)                      The Flex Project                       FLEX(1)
 Programming                                                     Programming

                                December 2016



 NAME
      flex - the fast lexical analyser generator

 SYNOPSIS
      flex [,OPTIONS/] [,FILE/]...

 DESCRIPTION
      Generates programs that perform pattern-matching on text.

    Table Compression:
      -Ca, --align
           trade off larger tables for better memory alignment

      -Ce, --ecs
           construct equivalence classes

      -Cf  do not compress tables; use -f representation

      -CF  do not compress tables; use -F representation

      -Cm, --meta-ecs
           construct meta-equivalence classes

      -Cr, --read
           use read() instead of stdio for scanner input

      -f, --full
           generate fast, large scanner. Same as -Cfr

      -F, --fast
           use alternate table representation. Same as -CFr

      -Cem default compression (same as --ecs --meta-ecs)

    Debugging:
      -d, --debug
           enable debug mode in scanner

      -b, --backup
           write backing-up information to lex.backup

      -p, --perf-report
           write performance report to stderr

      -s, --nodefault
           suppress default rule to ECHO unmatched text

      -T, --trace
           flex should run in trace mode



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 FLEX(1)                      The Flex Project                       FLEX(1)
 Programming                                                     Programming

                                December 2016



      -w, --nowarn
           do not generate warnings

      -v, --verbose
           write summary of scanner statistics to stdout

      --hex
           use hexadecimal numbers instead of octal in debug outputs

 FILES
      -o, --outfile=,FILE/
           specify output filename

      -S, --skel=,FILE/
           specify skeleton file

      -t, --stdout
           write scanner on stdout instead of lex.yy.c

      --yyclass=,NAME/
           name of C++ class

      --header-file=,FILE/
           create a C header file in addition to the scanner

      --tables-file[=,FILE/] write tables to FILE

    Scanner behavior:
      -7, --7bit
           generate 7-bit scanner

      -8, --8bit
           generate 8-bit scanner

      -B, --batch
           generate batch scanner (opposite of -I)

      -i, --case-insensitive
           ignore case in patterns

      -l, --lex-compat
           maximal compatibility with original lex

      -X, --posix-compat
           maximal compatibility with POSIX lex

      -I, --interactive
           generate interactive scanner (opposite of -B)




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 FLEX(1)                      The Flex Project                       FLEX(1)
 Programming                                                     Programming

                                December 2016



      --yylineno
           track line count in yylineno

    Generated code:
      -+,  --c++
           generate C++ scanner class

      -Dmacro[=,defn/]
           #define macro defn  (default defn is '1')

      -L,  --noline
           suppress #line directives in scanner

      -P,  --prefix=,STRING/
           use STRING as prefix instead of "yy"

      -R,  --reentrant
           generate a reentrant C scanner

      --bison-bridge
           scanner for bison pure parser.

      --bison-locations
           include yylloc support.

      --stdinit
           initialize yyin/yyout to stdin/stdout

      --nounistd
           do not include <unistd.h>

      --noFUNCTION
           do not generate a particular FUNCTION

    Miscellaneous:
      -c   do-nothing POSIX option

      -n   do-nothing POSIX option

      -?

      -h, --help
           produce this help message

      -V, --version
           report flex version

 SEE ALSO
      The full documentation for flex is maintained as a Texinfo manual.  If



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 FLEX(1)                      The Flex Project                       FLEX(1)
 Programming                                                     Programming

                                December 2016



      the info and flex programs are properly installed at your site, the
      command

           info flex

      should give you access to the complete manual.














































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