Ovid's beating a straw man in that quote. Nobody is suggesting that everyday you should bash out lots of awful code directly involving tieing. Would yourself and Ovid also object to exporting values and functions because it involves advanced symbol table poking? Of course not, it's all hidden behind Exporter. Most users don't know how it works at all.

The same goes for lvalue+tie. As I said in another post there's Class::Accessor::Lvalue. Personally I use my own home brew module which lets me say 

package Circle;

use Fergal::MM qw( Radius Area );
# this creates
# setRadius, getRadius, Radius
# setArea, getArea, Area
#
# All are created in Circle::Accessors and Circle's @ISA
# is updated to include Circle::Accessors.
# This makes overriding easy.

# now override the Area ones
sub setArea
{
  my ($self, $area) = @_;
  $self->Radius = sqrt($area/PI);
}

sub getArea
{
  my ($self, $area) = @_;
  my $r = $self->Radius;
  return PI * $r * $r;
}

[download]

This removes all but one of Ovid's complaints - it's probably slow but if you really need speed then you can just ignore the lvalue interface and use the set/get methods directly. I think I benchmarked it as a factor of 10 slower but how much of your code is accessor calls? If you really need speed, Perl OO is probably not what you want.

In reply to Re^7: Perl OO and accessors by fergal
in thread Perl OO and accessors by dragonchild

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