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
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;
}
See also http://tvtropes.org/pmwiki/pmwiki.php/Main/ThinkOfTheChildren.
use Moops; class Cow :rw { has name => (default => 'Ermintrude') }; say Cow->new->name
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