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";
}
}