From: Jeremy Bopp <jeremy@...>
Date: 2012-02-04T10:14:25+09:00
Subject: Re: Inheritance in other notation



luk malcik <aport99@gmail.com> wrote:

>Hi everybody! I've got a problem with ingeritance. If there is a
>notation like 'class Square', we can write class Rectangle like 'class
>Rectangle<Square'. But how it will be here?
>
>Square = Struct.new(:x,:y,:a) do
>   include Domieszka
>   def pole
>   p = a**2
>   end
>   def obwod
>   o = 4*a
>   end
>   def pole=(a)
>   self.a = a
>   end
>   def obwod=(a)
>   self.a = a
>   end
>end
>
>
>Rectangle<Square = Struct.new(:x,:y,:b) do
>   include Domieszka
>   def pole
>   p = a*b
>   end
>end

The constant Square is a class effectively equivalent to conventionally created classes, so you don't have to do anything special to make Rectangle descend from it. Just do it as you originally expected:

class Rectangle < Square
  ...
end

-Jeremy