tlex.1 - plan9port - [fork] Plan 9 from user space
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       tlex.1 (1519B)
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            1 .TH LEX 1
            2 .SH NAME
            3 lex \- generator of lexical analysis programs
            4 .SH SYNOPSIS
            5 .B lex
            6 [
            7 .B -tvn9
            8 ]
            9 [
           10 .I file ...
           11 ]
           12 .SH DESCRIPTION
           13 .I Lex
           14 generates programs to be used in simple lexical analysis of text.
           15 The input
           16 .I files
           17 (standard input default)
           18 contain regular expressions
           19 to be searched for and actions written in C to be executed when
           20 expressions are found.
           21 .PP
           22 A C source program,
           23 .B lex.yy.c
           24 is generated.
           25 This program, when run, copies unrecognized portions of
           26 the input to the output,
           27 and executes the associated
           28 C action for each regular expression that is recognized.
           29 .PP
           30 The options have the following meanings.
           31 .TP
           32 .B -t
           33 Place the result on the standard output instead of in file
           34 .BR lex.yy.c .
           35 .TP
           36 .B -v
           37 Print a one-line summary of statistics of the generated analyzer.
           38 .TP
           39 .B -n
           40 Opposite of
           41 .BR -v ;
           42 .B -n
           43 is default.
           44 .TP
           45 .B -9
           46 Adds code to be able to compile through the native C compilers.
           47 .SH EXAMPLES
           48 This program converts upper case to lower,
           49 removes blanks at the end of lines,
           50 and replaces multiple blanks by single blanks.
           51 .PP
           52 .EX
           53 %%
           54 [A-Z]        putchar(yytext[0]+\'a\'-\'A\');
           55 [ ]+$
           56 [ ]+        putchar(\' \');
           57 .EE
           58 .SH FILES
           59 .TF /sys/lib/lex/ncform
           60 .TP
           61 .B lex.yy.c
           62 output
           63 .TP
           64 .B /sys/lib/lex/ncform
           65 template
           66 .SH "SEE ALSO"
           67 .IR yacc (1), 
           68 .MR sed (1)
           69 .br
           70 M. E. Lesk and E. Schmidt,
           71 `LEX\(emLexical Analyzer Generator', 
           72 .I
           73 Unix Research System Programmer's Manual,
           74 Tenth Edition, Volume 2.
           75 .SH SOURCE
           76 .B \*9/src/cmd/lex
           77 .SH BUGS
           78 Cannot handle
           79 .SM UTF.
           80 .PP
           81 The asteroid to kill this dinosaur is still in orbit.