1 058b0118 2005-01-03 devnull .TH LEX 1
 2 058b0118 2005-01-03 devnull .SH NAME
 3 058b0118 2005-01-03 devnull lex \- generator of lexical analysis programs
 4 058b0118 2005-01-03 devnull .SH SYNOPSIS
 5 058b0118 2005-01-03 devnull .B lex
 6 058b0118 2005-01-03 devnull [
 7 058b0118 2005-01-03 devnull .B -tvn9
 8 058b0118 2005-01-03 devnull ]
 9 058b0118 2005-01-03 devnull [
10 058b0118 2005-01-03 devnull .I file ...
11 058b0118 2005-01-03 devnull ]
12 058b0118 2005-01-03 devnull .SH DESCRIPTION
13 058b0118 2005-01-03 devnull .I Lex
14 058b0118 2005-01-03 devnull generates programs to be used in simple lexical analysis of text.
15 058b0118 2005-01-03 devnull The input
16 058b0118 2005-01-03 devnull .I files
17 058b0118 2005-01-03 devnull (standard input default)
18 058b0118 2005-01-03 devnull contain regular expressions
19 058b0118 2005-01-03 devnull to be searched for and actions written in C to be executed when
20 058b0118 2005-01-03 devnull expressions are found.
21 058b0118 2005-01-03 devnull .PP
22 058b0118 2005-01-03 devnull A C source program,
23 058b0118 2005-01-03 devnull .B lex.yy.c
24 058b0118 2005-01-03 devnull is generated.
25 058b0118 2005-01-03 devnull This program, when run, copies unrecognized portions of
26 058b0118 2005-01-03 devnull the input to the output,
27 058b0118 2005-01-03 devnull and executes the associated
28 058b0118 2005-01-03 devnull C action for each regular expression that is recognized.
29 058b0118 2005-01-03 devnull .PP
30 058b0118 2005-01-03 devnull The options have the following meanings.
31 058b0118 2005-01-03 devnull .TP
32 058b0118 2005-01-03 devnull .B -t
33 058b0118 2005-01-03 devnull Place the result on the standard output instead of in file
34 058b0118 2005-01-03 devnull .BR lex.yy.c .
35 058b0118 2005-01-03 devnull .TP
36 058b0118 2005-01-03 devnull .B -v
37 058b0118 2005-01-03 devnull Print a one-line summary of statistics of the generated analyzer.
38 058b0118 2005-01-03 devnull .TP
39 058b0118 2005-01-03 devnull .B -n
40 058b0118 2005-01-03 devnull Opposite of
41 058b0118 2005-01-03 devnull .BR -v ;
42 058b0118 2005-01-03 devnull .B -n
43 058b0118 2005-01-03 devnull is default.
44 058b0118 2005-01-03 devnull .TP
45 058b0118 2005-01-03 devnull .B -9
46 058b0118 2005-01-03 devnull Adds code to be able to compile through the native C compilers.
47 058b0118 2005-01-03 devnull .SH EXAMPLES
48 058b0118 2005-01-03 devnull This program converts upper case to lower,
49 058b0118 2005-01-03 devnull removes blanks at the end of lines,
50 058b0118 2005-01-03 devnull and replaces multiple blanks by single blanks.
51 058b0118 2005-01-03 devnull .PP
52 058b0118 2005-01-03 devnull .EX
53 058b0118 2005-01-03 devnull %%
54 058b0118 2005-01-03 devnull [A-Z]	putchar(yytext[0]+\'a\'-\'A\');
55 058b0118 2005-01-03 devnull [ ]+$
56 058b0118 2005-01-03 devnull [ ]+	putchar(\' \');
57 058b0118 2005-01-03 devnull .EE
58 058b0118 2005-01-03 devnull .SH FILES
59 058b0118 2005-01-03 devnull .TF /sys/lib/lex/ncform
60 058b0118 2005-01-03 devnull .TP
61 058b0118 2005-01-03 devnull .B lex.yy.c
62 058b0118 2005-01-03 devnull output
63 058b0118 2005-01-03 devnull .TP
64 058b0118 2005-01-03 devnull .B /sys/lib/lex/ncform
65 058b0118 2005-01-03 devnull template
66 058b0118 2005-01-03 devnull .SH "SEE ALSO"
67 058b0118 2005-01-03 devnull .IR yacc (1), 
68 d32deab1 2020-08-16 rsc .MR sed (1)
69 058b0118 2005-01-03 devnull .br
70 058b0118 2005-01-03 devnull M. E. Lesk and E. Schmidt,
71 058b0118 2005-01-03 devnull `LEX\(emLexical Analyzer Generator', 
72 058b0118 2005-01-03 devnull .I
73 058b0118 2005-01-03 devnull Unix Research System Programmer's Manual,
74 058b0118 2005-01-03 devnull Tenth Edition, Volume 2.
75 058b0118 2005-01-03 devnull .SH SOURCE
76 c3674de4 2005-01-11 devnull .B \*9/src/cmd/lex
77 058b0118 2005-01-03 devnull .SH BUGS
78 058b0118 2005-01-03 devnull Cannot handle
79 058b0118 2005-01-03 devnull .SM UTF.
80 c8b6342d 2005-01-13 devnull .PP
81 058b0118 2005-01-03 devnull The asteroid to kill this dinosaur is still in orbit.