Won't somebody please think of the children?!?!.

package Parent {
   sub legacy_method {
      my ($self, @args) = @_;
      return $self->current_method(@args);
   }
   sub current_method {
      return 1;
   }
}

package Child {
   use base 'Parent';
   sub current_method {
      return 2;
   }
}

Child->legacy_method;  # returns 2

[download]

If you swap in your goto implementation of the legacy method, then calling Child->legacy_method returns 1.

Here's an alternative safer version using goto...

sub legacy_method {
  my $next = $_[0]->can('current_method');
  goto $next;
}

[download]

See also http://tvtropes.org/pmwiki/pmwiki.php/Main/ThinkOfTheChildren.

use Moops; class Cow :rw { has name => (default => 'Ermintrude') }; say Cow->new->name

In reply to Re: method aliases with goto(&NAME) by tobyink
in thread method aliases with goto(&NAME) by citromatik

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