From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-02-02T18:41:45+09:00
Subject: Re: no override

On Sun, Feb 02, 2003 at 04:51:08PM +0900, Tom Sawyer wrote:
> is there any way to specifiy that a method can not be overrided? perfereably 
> without throwing an error; rather if you try to override the method it simply 
> dosen't happen.

Kind of evil, but works:

batsman@tux-chan:/tmp$ expand -t 2 f.rb
module NoOverloading
  @@no_override = []
  def no_redef(*args)
    args.each { |i| @@no_override << i }
  end

  def method_added(id)
    return if @@no_override.index(id) == nil
    remove_method id
  end
end


class A
  extend NoOverloading
  def a; puts "A#a"; end
  def b; puts "A#b"; end
  no_redef :a, :b  # do it after defining the methods :)
end

class B < A
  def a; puts "B#a"; end
  def b; puts "B#b"; end
end

b = B.new
b.a
b.b
batsman@tux-chan:/tmp$ ruby f.rb
A#a
A#b

-- 
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