From: ara.t.howard@...
Date: 2006-10-18T02:33:24+09:00
Subject: Re: metaprogramming surprise?

On Wed, 18 Oct 2006, J2M wrote:

> To achieve what you were trying you may want to look at the class
> extensions in rails where there are simple class level accessors and
> inheritable_class accessors that give each inherited class it's own
> copy of the accessors from the parent class.
>
> http://dev.rubyonrails.org/svn/rails/branches/stable/activesupport/lib/active_support/core_ext/class/


attributes.rb is 42 lines of code and does all of that too, plus up front or
deferred initialisation.


   harp:~ > cat a.rb
   require 'rubygems'
   require 'attributes'

   class A
     class << self
       attribute 'a' => 42
       attribute('classname'){ self.name }
     end
   end

   class B < A
   end

   p A.a
   p B.a

   p A.classname
   p B.classname



   harp:~ > ruby a.rb
   42
   42
   "A"
   "B"




-a
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