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#!/usr/bin/perl -sw
# IT'S A PARSER *AND* A LEXER...
use Parse::RecDescent;
use Data::Dumper;
$lexer = new Parse::RecDescent q
{
lex: token(s)
token: 'I\b' <token:POSS>
| 'see\b' <token:VERB>
| 'on\b' <token:PREP>
| 'by\b' <token:PREP>
| /the\b|a\b/i <token:ARTICLE>
| /\w+/ <token:WORD,PUNCT,OTHER>
};
$data = join '', <DATA>;
print_tokens($lexer->lex(\$data));
print "left: [$data]\n";
sub print_tokens
{
foreach $token ( @{$_[0]} )
{
print Dumper($token), "\n";
}
}
__DATA__
I see a cat on the windowsill by the door!!!!!