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Manual Reference Pages  - FLEX (1)

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flex - fast lexical analyzer generator

CONTENTS

Synopsis
Description

flex [OPTIONS] [FILE]...

Generates programs that perform pattern-matching on text.

-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)

-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
-w, --nowarn
	do not generate warnings
-v, --verbose
	write summary of scanner statistics to stdout

-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

-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)
--yylineno
	track line count in yylineno

-+, --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
--noansi-definitions old-style function definitions
--noansi-prototypes
	empty parameter list in prototypes
--nounistd
	do not include <unistd.h>
--noFUNCTION
	do not generate a particular FUNCTION

-c	do-nothing POSIX option
-n	do-nothing POSIX option
-?
-h, --help	produce this help message
-V, --version
	report flex version

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

	info flex

should give you access to the complete manual.
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