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
%s
-p, --perf-report write performance report to stderr
-s, --nodefault suppress default rule to ECHO unmatched text
-T, --trace
%s should run in trace mode
-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
%s
--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)
--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
%s version
