LEX(1)LEX(1)NAMElex - generator of lexical analysis programs
SYNOPSISlex [ -tvn9 ] [ file ... ]
Lex generates programs to be used in simple lexical analysis of text.
The input files (standard input default) contain regular expressions to
be searched for and actions written in C to be executed when expres‐
sions are found.
A C source program, lex.yy.c is generated. This program, when run,
copies unrecognized portions of the input to the output, and executes
the associated C action for each regular expression that is recognized.
The options have the following meanings.
-t Place the result on the standard output instead of in file
-v Print a one-line summary of statistics of the generated ana‐
-n Opposite of -v; -n is default.
-9 Adds code to be able to compile through the native C compilers.
This program converts upper case to lower, removes blanks at the end of
lines, and replaces multiple blanks by single blanks.
[ ]+ putchar(´ ´);
SEE ALSOyacc(1), sed(1)
M. E. Lesk and E. Schmidt, `LEX—Lexical Analyzer Generator', Unix
Research System Programmer's Manual, Tenth Edition, Volume 2.
Cannot handle UTF.
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