From: Christoph <chr_news@...>
Date: 2002-04-10T06:24:56+09:00
Subject: RE: Mixins vs. Multiple Inheritance

> From: Paul Brannan 
...
> then there are a few important differences between C++ MI and Ruby
> mix-ins:

Note you can create a Ruby ``mixin-diamond'' with a  C++ - ``(virtual)
inheritance-diamond'' like method search order (see  [ruby-talk:37486])
.

>   1) Ruby simplifies this inheritance to look like:
....

>   6) Mixing in a module in Ruby can actually cause code to be
executed.
>      This doesn't happen with Ruby's inheritance (correct me if I'm

----
class A
    def self.inherited(sub_klass)
	puts "#{self} < #{sub_klass}"
    end
end

class B < A; end # => A  <  B
----

...
/Christoph