From: Rob Biedenharn <Rob@...>
Date: 2007-12-15T00:18:52+09:00
Subject: Re: Enforce implementation of Module method

On Dec 14, 2007, at 9:58 AM, Gareth Adams wrote:
> Phrogz <phrogz <at> mac.com> writes:
>> module Parenting
>>  def children
>>    raise "OOPS!" #Better error message here
>>  end
>> end
>>
>> If a class defines that method, it will shadow the module method. As
>> long as the class method doesn't try to call super, you should be  
>> good
>> to go.
>
> And of course, there's a rather handy NotImplementedError class just  
> sat there
> in Ruby code if you want to use it.

If you simply don't define Parenting#children, you'll get a  
NoMethodError.  Isn't that good enough?

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com