\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.47.3.
TH FLEX "1" "May 2017" "The Flex Project" "Programming"
SH NAME
flex \- the fast lexical analyser generator
SH SYNOPSIS
B flex
[\fI\,OPTIONS\/\fR] [\fI\,FILE\/\fR]...
SH DESCRIPTION
Generates programs that perform pattern\-matching on text.
SS "Table Compression:"
TP
\fB\-Ca\fR, \fB\-\-align\fR
trade off larger tables for better memory alignment
TP
\fB\-Ce\fR, \fB\-\-ecs\fR
construct equivalence classes
TP
\fB\-Cf\fR
do not compress tables; use \fB\-f\fR representation
TP
\fB\-CF\fR
do not compress tables; use \fB\-F\fR representation
TP
\fB\-Cm\fR, \fB\-\-meta\-ecs\fR
construct meta\-equivalence classes
TP
\fB\-Cr\fR, \fB\-\-read\fR
use read() instead of stdio for scanner input
TP
\fB\-f\fR, \fB\-\-full\fR
generate fast, large scanner. Same as \fB\-Cfr\fR
TP
\fB\-F\fR, \fB\-\-fast\fR
use alternate table representation. Same as \fB\-CFr\fR
TP
\fB\-Cem\fR
default compression (same as \fB\-\-ecs\fR \fB\-\-meta\-ecs\fR)
SS "Debugging:"
TP
\fB\-d\fR, \fB\-\-debug\fR
enable debug mode in scanner
TP
\fB\-b\fR, \fB\-\-backup\fR
write backing\-up information to lex.backup
TP
\fB\-p\fR, \fB\-\-perf\-report\fR
write performance report to stderr
TP
\fB\-s\fR, \fB\-\-nodefault\fR
suppress default rule to ECHO unmatched text
TP
\fB\-T\fR, \fB\-\-trace\fR
flex should run in trace mode
TP
\fB\-w\fR, \fB\-\-nowarn\fR
do not generate warnings
TP
\fB\-v\fR, \fB\-\-verbose\fR
write summary of scanner statistics to stdout
TP
\fB\-\-hex\fR
use hexadecimal numbers instead of octal in debug outputs
SH FILES
TP
\fB\-o\fR, \fB\-\-outfile\fR=\fI\,FILE\/\fR
specify output filename
TP
\fB\-S\fR, \fB\-\-skel\fR=\fI\,FILE\/\fR
specify skeleton file
TP
\fB\-t\fR, \fB\-\-stdout\fR
write scanner on stdout instead of lex.yy.c
TP
\fB\-\-yyclass\fR=\fI\,NAME\/\fR
name of C++ class
TP
\fB\-\-header\-file\fR=\fI\,FILE\/\fR
create a C header file in addition to the scanner
HP
\fB\-\-tables\-file\fR[=\fI\,FILE\/\fR] write tables to FILE
SS "Scanner behavior:"
TP
\fB\-7\fR, \fB\-\-7bit\fR
generate 7\-bit scanner
TP
\fB\-8\fR, \fB\-\-8bit\fR
generate 8\-bit scanner
TP
\fB\-B\fR, \fB\-\-batch\fR
generate batch scanner (opposite of \fB\-I\fR)
TP
\fB\-i\fR, \fB\-\-case\-insensitive\fR
ignore case in patterns
TP
\fB\-l\fR, \fB\-\-lex\-compat\fR
maximal compatibility with original lex
TP
\fB\-X\fR, \fB\-\-posix\-compat\fR
maximal compatibility with POSIX lex
TP
\fB\-I\fR, \fB\-\-interactive\fR
generate interactive scanner (opposite of \fB\-B\fR)
TP
\fB\-\-yylineno\fR
track line count in yylineno
SS "Generated code:"
TP
\-+, \fB\-\-c\fR++
generate C++ scanner class
TP
\fB\-Dmacro\fR[=\fI\,defn\/\fR]
#define macro defn (default defn is '1')
TP
\fB\-L\fR, \fB\-\-noline\fR
suppress #line directives in scanner
TP
\fB\-P\fR, \fB\-\-prefix\fR=\fI\,STRING\/\fR
use STRING as prefix instead of "yy"
TP
\fB\-R\fR, \fB\-\-reentrant\fR
generate a reentrant C scanner
TP
\fB\-\-bison\-bridge\fR
scanner for bison pure parser.
TP
\fB\-\-bison\-locations\fR
include yylloc support.
TP
\fB\-\-stdinit\fR
initialize yyin/yyout to stdin/stdout
TP
\fB\-\-nounistd\fR
do not include <unistd.h>
TP
\fB\-\-noFUNCTION\fR
do not generate a particular FUNCTION
SS "Miscellaneous:"
TP
\fB\-c\fR
do\-nothing POSIX option
TP
\fB\-n\fR
do\-nothing POSIX option
HP
\-?
TP
\fB\-h\fR, \fB\-\-help\fR
produce this help message
TP
\fB\-V\fR, \fB\-\-version\fR
report flex version
SH "SEE ALSO"
The full documentation for
B flex
is maintained as a Texinfo manual. If the
B info
and
B flex
programs are properly installed at your site, the command
IP
B info flex
PP
should give you access to the complete manual.
