Further to what BrowserUk and sauoq have said, prototypes are ignored by methods e.g

sub foo($) {
  print "got @_\n";
}

my @args = qw/ more than one arg /;

## class method call
main->foo(@args);

## standard sub call
foo(@args);

__output__

got main more than one arg
got 4
[download]

This behaviour can be attributed to the fact that exact method to be called cannot be determined until runtime.
HTH

_________
broquaint