Child classes implement a MooseX::Interface with MooseX::ABC (Abstract Base Class)

Question

I am trying to force all child classes of an Abstract Base Class to implement an interface. When I try add with '<interface>' to the ABC, it requires me to implement the required methods immediately and add sub <method> {} for each interface method.

To Illustrate the Problem,

package drawAPI {
   use MooseX::Interface;
   require 'draw';
   one;
}

package shape {
   use MooseX::ABC;
   with 'drawAPI';
}

package square {
   extends 'shape';
    #here is where having a draw subroutine would be inforced
   sub draw {};
}

Does anyone know a way to do this? or can recommend a different set of modules to accomplish this?

Thanks

Answer 1

The documentation for MooseX::ABC states "NOTE: This module is almost certainly a bad idea. You really want to just be using a role instead!". The documentation for MooseX::Interface states that "Interfaces are just roles with a few additional restrictions..." Your choice of modules suggests that you want Moose to look and work like Java, which is a lost cause. The good news is that Moose Roles can almost certainly provide much if not all of the behavior you're looking for. Furthermore, you might be surprised by some of the powerful things that you can accomplish with Roles that don't have an analog in Java.