NAME
lex – generator of lexical analysis programs |
SYNOPSIS
lex [ –tvn9 ] [ file ... ] |
DESCRIPTION
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 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. |
EXAMPLES
This program converts upper case to lower, removes blanks at the
end of lines, and replaces multiple blanks by single blanks.
%% |
FILES
lex.yy.c output /sys/lib/lex/ncform template |
SEE ALSO
yacc(1), sed(1) M. E. Lesk and E. Schmidt, `LEX--Lexical Analyzer Generator', Unix Research System Programmer's Manual, Tenth Edition, Volume 2. |
SOURCE
/sys/src/cmd/lex |
BUGS
Cannot handle UTF.
The asteroid to kill this dinosaur is still in orbit. |