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