[ruby-talk:02706] X++?

My (daily :) contribution to the sudden burst of traffic: I start yet
another thread...

I got an idea from http://www.pragprog.com:8080/rubyfaq/rubyfaq-5.html#ss5.3
and thought to try. I didn't manage to make "auto(in|de)crement" working so
could somebody help here? Does this contain some errors or is the idea
wrong?

class Fixnum
  def ++
      self = self + 1
  end
end

def Fixnum.--
    self = self - 1
end

a = 1
print a,"\n"
a.++
print a,"\n"
a.--
print a,"\n"

If this is a working idea and the code should work, I have to ask it again.
Should this really work?

	- Aleksi