GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
Debian 6.0.4(Squeeze) |
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flex++(1) |
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flex − the fast lexical analyser generator
flex [OPTIONS] [FILE]...
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
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−Cf |
do not compress tables; use −f representation |
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−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
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−Cem |
default compression (same as −−ecs −−meta−ecs) |
Debugging:
−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
Files:
−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
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−−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
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−−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
Miscellaneous:
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−c |
do−nothing POSIX option |
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−n |
do−nothing POSIX option |
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−? |
−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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flex++(1) | |