1FLEX(1)                          User Commands                         FLEX(1)
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NAME

6       flex - the fast lexical analyser generator
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SYNOPSIS

9       flex [OPTIONS] [FILE]...
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DESCRIPTION

12       Generates programs that perform pattern-matching on text.
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14   Table Compression:
15       -Ca, --align
16              trade off larger tables for better memory alignment
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18       -Ce, --ecs
19              construct equivalence classes
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21       -Cf    do not compress tables; use -f representation
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23       -CF    do not compress tables; use -F representation
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25       -Cm, --meta-ecs
26              construct meta-equivalence classes
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28       -Cr, --read
29              use read() instead of stdio for scanner input
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31       -f, --full
32              generate fast, large scanner. Same as -Cfr
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34       -F, --fast
35              use alternate table representation. Same as -CFr
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37       -Cem   default compression (same as --ecs --meta-ecs)
38
39   Debugging:
40       -d, --debug
41              enable debug mode in scanner
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43       -b, --backup
44              write backing-up information to lex.backup
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46       -p, --perf-report
47              write performance report to stderr
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49       -s, --nodefault
50              suppress default rule to ECHO unmatched text
51
52       -T, --trace
53              flex should run in trace mode
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55       -w, --nowarn
56              do not generate warnings
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58       -v, --verbose
59              write summary of scanner statistics to stdout
60
61   Files:
62       -o, --outfile=FILE
63              specify output filename
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65       -S, --skel=FILE
66              specify skeleton file
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68       -t, --stdout
69              write scanner on stdout instead of lex.yy.c
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71       --yyclass=NAME
72              name of C++ class
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74       --header-file=FILE
75              create a C header file in addition to the scanner
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77       --tables-file[=FILE] write tables to FILE
78
79   Scanner behavior:
80       -7, --7bit
81              generate 7-bit scanner
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83       -8, --8bit
84              generate 8-bit scanner
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86       -B, --batch
87              generate batch scanner (opposite of -I)
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89       -i, --case-insensitive
90              ignore case in patterns
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92       -l, --lex-compat
93              maximal compatibility with original lex
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95       -X, --posix-compat
96              maximal compatibility with POSIX lex
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98       -I, --interactive
99              generate interactive scanner (opposite of -B)
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101       --yylineno
102              track line count in yylineno
103
104   Generated code:
105       -+,  --c++
106              generate C++ scanner class
107
108       -Dmacro[=defn]
109              #define macro defn  (default defn is '1')
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111       -L,  --noline
112              suppress #line directives in scanner
113
114       -P,  --prefix=STRING
115              use STRING as prefix instead of "yy"
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117       -R,  --reentrant
118              generate a reentrant C scanner
119
120       --bison-bridge
121              scanner for bison pure parser.
122
123       --bison-locations
124              include yylloc support.
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126       --stdinit
127              initialize yyin/yyout to stdin/stdout
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129       --noansi-definitions old-style function definitions
130
131       --noansi-prototypes
132              empty parameter list in prototypes
133
134       --nounistd
135              do not include <unistd.h>
136
137       --noFUNCTION
138              do not generate a particular FUNCTION
139
140   Miscellaneous:
141       -c     do-nothing POSIX option
142
143       -n     do-nothing POSIX option
144
145       -?
146
147       -h, --help
148              produce this help message
149
150       -V, --version
151              report flex version
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SEE ALSO

154       The  full documentation for flex is maintained as a Texinfo manual.  If
155       the info and flex programs are properly installed  at  your  site,  the
156       command
157
158              info flex
159
160       should give you access to the complete manual.
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164flex 2.5.35                      February 2008                         FLEX(1)
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