From: Dave Thomas <Dave@...>
Date: 2001-08-19T02:53:54+09:00
Subject: [ruby-talk:19977] Re: How to do arbitrary super calls?

Ned Konz <ned@bike-nomad.com> writes:

> So how do you do the Ruby equivalent of this Smalltalk (pseudocode, Child 
> inherits from Parent)?
> 
> Parent>>a
>    "do something"
> 
> Parent>>b
>   "do something else"
> 
> Child>>a
>   "do something"
>   super a
> 
> Child>>b
>   super a "get the original behavior of a, not the overridden"
>   "do something else"

     class A
       def a
         puts "A#a"
       end
       def b
         puts "A#b"
       end
     end

     class B < A
       alias :super_a :a
       def a
         puts "B#a"
         super
       end
       def b
         puts "B#b"
         super_a
       end
     end

     b = B.new
     b.a
     b.b

> This is a pattern that comes up from time to time.

I'm trying to think when I'd see this and not think to myself: there's
something wrong here.

Dave