package ACME::WeightWatchers;
use Carp;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = 'watchsize';
sub watchsize {
local $/ = "\n";
my $caller = caller;
open _, "$caller::$0";
while (<_>) {
$. == 40
and confess "no more Perl for me, unless less than 40 lines\n";
}
}
#!/usr/bin/perl
use strict;
use warnings;
use ACME::WeightWatchers;
watchsize();
# your code here ...
print "I made it under 40!\n";
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