From: Massimiliano Mirra <list@...>
Date: 2001-11-25T22:46:39+09:00
Subject: [ruby-talk:26447] Re: dynamically redefining methods

On Sun, Nov 25, 2001 at 12:38:11AM +0900, Jakub Travnik wrote:
> try this:
> module Loggable
>   def self.append_features(klass)
>     klass.instance_methods.each do |method|
>       klass.class_eval "  alias ___#{method} #{method};"+
> 	"  def #{method}(*params,&block);"+
> 	"    ___#{method}(*params,&block);"+
> 	"    puts 'call to #{method} logged';"+
> 	"  end;"
>     end
>   end
> end

I wasn't aware of class_eval.  It works perfectly, thanks!

BTW, it also corrects an extra mistake in my code: I called ``super''
in the redefined method, but there isn't necessarily a superclass's
method to call (neither there was in this case).

Massimiliano