Plan 9 - man page for lex (plan9 section 1)
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lex - generator of lexical analysis programs
lex [ -tvn ] [ 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 writ-
ten in C to be executed when expressions 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 lex.yy.c.
-v Print a one-line summary of statistics of the generated analyzer.
-n Opposite of -v; -n is default.
This program converts upper case to lower, removes blanks at the end of lines, and
replaces multiple blanks by single blanks.
[ ]+ putchar(' ');
M. E. Lesk and E. Schmidt, `LEX--Lexical Analyzer Generator', Unix Research System Pro-
grammer's Manual, Tenth Edition, Volume 2.
Cannot handle UTF.
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