Hi,

I read a lot of documentation on OO-Perl. It looks great and I missed a detail for making a clean implementation: I try to get a list of derived classes for a base (super) class. Here is a simplified example:

use strict;
use warnings;

package Element;
 sub new {
 my $type = shift;
 my $self = {};
 bless $self, $type;
 }
 
package Circle;
 use vars qw(@ISA);
 @ISA = qw( Element );

package Square;
 use vars qw(@ISA);
 @ISA = qw( Element );

package Line;
 use vars qw(@ISA);
 @ISA = qw( Element );

package main;

# seeking for a function like:
# list_of_derived_classes ('Element');
# which returns -> 'Circle', 'Square', 'Line'

[download]
How can I implement the function list_of_derived_classes as noted in the example above?

A possible solution would be too, if the derived classes would register himself in the super class. But this solution shouldn't have code redundance. A good idea would be, if the super class contains the code for registering. This code should be called from the derived classes.

In reply to OO-Perl Question: How Do I get a List of derived Classes for a Base Class? by BluePerl

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