Return to lex CVS log

Up to [Plan 9 NeXT] / lucent / sys / man / 1

Annotation of lucent/sys/man/1/lex, revision 1.1.1.1

1.1       root        1: .TH LEX 1
                      2: .SH NAME
                      3: lex \- generator of lexical analysis programs
                      4: .SH SYNOPSIS
                      5: .B lex
                      6: [
                      7: .B -tvn
                      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: .SH EXAMPLES
                     45: This program converts upper case to lower,
                     46: removes blanks at the end of lines,
                     47: and replaces multiple blanks by single blanks.
                     48: .PP
                     49: .EX
                     50: %%
                     51: [A-Z]  putchar(yytext[0]+\'a\'-\'A\');
                     52: [ ]+$
                     53: [ ]+   putchar(\' \');
                     54: .EE
                     55: .SH FILES
                     56: .TF /sys/lib/lex/ncform
                     57: .TP
                     58: .B lex.yy.c
                     59: output
                     60: .TP
                     61: .B /sys/lib/lex/ncform
                     62: template
                     63: .SH "SEE ALSO"
                     64: .IR yacc (1), 
                     65: .IR sed (1)
                     66: .br
                     67: M. E. Lesk and E. Schmidt,
                     68: `LEX\(emLexical Analyzer Generator', 
                     69: .I
                     70: Unix Research System Programmer's Manual,
                     71: Tenth Edition, Volume 2.
                     72: .SH SOURCE
                     73: .B /sys/src/cmd/lex
                     74: .SH BUGS
                     75: Cannot handle
                     76: .SM UTF.
                     77: .br
                     78: The asteroid to kill this dinosaur is still in orbit.

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.