From: Jim Freeze <jim@...>
Date: 2002-12-13T22:44:34+09:00
Subject: Re: Inheritance Question

On Friday, 13 December 2002 at 15:45:27 +0900, Gavin Sinclair wrote:
> From: "Jim Freeze" <jim@freeze.org>
> 
> 
> I think for forwarding a whole lot of methods to Matrix, you can use
> 
>   require 'delegate'
> 
>   MyMatrix = DelegateClass(Matrix)
> 
>   class MyMatrix
>     # Your methods here
>   end
 
 
Well, the way Matrix is setup, it makes even using DelegateClass
difficult.

cat d.rb
require 'delegate'
require 'matrix'

class MyMatrix < DelegateClass(Matrix)
  def initialize(a)
    super Matrix[a]
  end
end


m = MyMatrix[[1,2],[3,4]]
> ruby d.rb
d.rb:11: undefined method `[]' for MyMatrix:Class (NameError)


-- 
Jim Freeze
----------
"At least they're EXPERIENCED incompetents"