sub deref { my $ref = shift; return $$ref; }

##</code><code>##

sub deref { ${$_[0]} }

##</code><code>##

sub deref { ${shift} }

##</code><code>##

sub deref { ${shift@_} } # too much explicit
sub deref { ${+shift} }  # supersticious? cfr. Roger
sub deref { ${shift;} }