my $class = ref $type || $type;
Nix that; you don't need it.
sub new {
my $type = shift; # Call as: World->new ();
my $class = ref $type || $type;
return Hello::new ($class);
}
You don't need that either. Just delete the whole thing.
# Now call up to get base class work done
return $self->Hello::hi (' World' . $tail);
This is a lot better as:
return $self->SUPER::hi( ' World' . $tail );
... or even:
use SUPER;
# ...
return $self->SUPER( ' World' . $tail );
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