Manual Page - flex(1)
Manual Reference Pages - FLEX (1)
NAME
flex - fast lexical analyzer generator
CONTENTS
Synopsis
Description
SYNOPSIS
flex [OPTIONS] [FILE]...
DESCRIPTION
Generates programs that perform pattern-matching on text.
Table Compression:
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-Ca, --align
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trade off larger tables for better memory alignment
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-Ce, --ecs
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construct equivalence classes
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-Cf
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do not compress tables; use -f representation
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-CF
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do not compress tables; use -F representation
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-Cm, --meta-ecs
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construct meta-equivalence classes
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-Cr, --read
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use read() instead of stdio for scanner input
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-f, --full
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generate fast, large scanner. Same as -Cfr
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-F, --fast
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use alternate table representation. Same as -CFr
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-Cem
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default compression (same as --ecs --meta-ecs)
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Debugging:
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-d, --debug
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enable debug mode in scanner
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-b, --backup
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write backing-up information to lex.backup
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-p, --perf-report
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write performance report to stderr
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-s, --nodefault
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suppress default rule to ECHO unmatched text
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-T, --trace
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flex should run in trace mode
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-w, --nowarn
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do not generate warnings
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-v, --verbose
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write summary of scanner statistics to stdout
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Files:
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-o, --outfile=FILE
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specify output filename
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-S, --skel=FILE
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specify skeleton file
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-t, --stdout
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write scanner on stdout instead of lex.yy.c
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--yyclass=NAME
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name of C++ class
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--header-file=FILE
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create a C header file in addition to the scanner
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--tables-file[=FILE] write tables to FILE
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Scanner behavior:
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-7, --7bit
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generate 7-bit scanner
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-8, --8bit
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generate 8-bit scanner
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-B, --batch
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generate batch scanner (opposite of -I)
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-i, --case-insensitive
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ignore case in patterns
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-l, --lex-compat
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maximal compatibility with original lex
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-X, --posix-compat
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maximal compatibility with POSIX lex
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-I, --interactive
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generate interactive scanner (opposite of -B)
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--yylineno
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track line count in yylineno
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Generated code:
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-+, --c++
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generate C++ scanner class
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-Dmacro[=defn]
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#define macro defn (default defn is ’1’)
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-L, --noline
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suppress #line directives in scanner
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-P, --prefix=STRING
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use STRING as prefix instead of "yy"
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-R, --reentrant
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generate a reentrant C scanner
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--bison-bridge
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scanner for bison pure parser.
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--bison-locations
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include yylloc support.
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--stdinit
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initialize yyin/yyout to stdin/stdout
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--noansi-definitions old-style function definitions
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--noansi-prototypes
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empty parameter list in prototypes
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--nounistd
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do not include <unistd.h>
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--noFUNCTION
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do not generate a particular FUNCTION
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Miscellaneous:
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-c
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do-nothing POSIX option
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-n
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do-nothing POSIX option
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-?
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-h, --help
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produce this help message
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-V, --version
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report flex version
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SEE ALSO
The full documentation for
flex is maintained as a Texinfo manual. If the
info and
flex programs are properly installed at your site, the command
should give you access to the complete manual.
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| flex 2.5.33 | FLEX (1) | February 2006 |
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