From: retnuh@... (Hunter Kelly)
Date: 2004-07-22T02:07:03+09:00
Subject: Re: Skipping an ancestor method

Should this take a block, for completeness?

H

Florian Gross <flgr@ccan.de> wrote in message news:<2m576aFj3oedU1@uni-berlin.de>...
 
> For the fun of it I've taken this to the extreme and called it 
> superjump: (It 'jumps' over one or more method in the inheritance chain)
> 
> # Like super this calls methods from the inheritance chain which this
> # method is replacing. However this version jumps over one or more
> # methods in the inheritance chain. It is used like this:
> #
> #   class X
> #     def it; p "X#it"; end
> #   end
> #
> #   class Y < X
> #     def it; p "Y#it"; end
> #   end
> #
> #   class Z < Y
> #     def it
> #       p "Z#it"
> #       superjump
> #     end
> #   end
> #
> #   Z.new.it # outputs "X#it", "Z#it"
> #
> # Be careful. This method can't automatically pass the arguments of the
> # caller like super does. You'll have to manually supply them.
> def superjump(gap, *args)
>    method_name = caller[0][/in `(.*?)'/, 1].intern
>    klass = self.class.ancestors[1 + gap]
>    klass.instance_method(method_name).bind(self).call(*args)
> end
> 
> Regards,
> Florian Gross