From: Benedikt Huber <benjovi@...>
Date: 2005-01-18T04:06:08+09:00
Subject: Re: Fwd: [suby-ruby] Your all time desired fundemental Ruby mod

On Sun, 16 Jan 2005 09:23:56 +0900, trans.  (T. Onoma) wrote:
> Let say you're Matz, but without any of the pressures of keeping up with a 
> previous version of Ruby. What one thing above all others would you like to 
> see differ about Ruby?
> 
> T.

1) First of all, a faster VM, including opcode (YARV ?)
2) A "strict mode" for instance variables (like perlish my @var or
attr_reader style declaration) - typos are quite subtle if they raise no
Exception immidiatly
3) Support for role-based programming.

ad 3) Solving the last ruby quiz, I used the following workaround for a
simple role change (only 1 role). Are there more sophisticated
solutions/frameworks available ?


#!/usr/bin/ruby
class Role
  def initialize(object)
    @__o__= object
  end

  def method_missing(symbol,*args)
    @__o__.send(symbol,*args)
  end

  def __role__=(object)
    @__o__ = object
  end

  undef_method  :class,:display,:dup,:initialize_copy,:inspect,:instance_eval
  undef_method  :instance_of?,:instance_variable_get,:instance_variable_set   
  undef_method  :instance_variables,:is_a?,:kind_of?,:method,:methods
  undef_method  :private_methods,:protected_methods,:public_methods   
  undef_method  :remove_instance_variable,:respond_to?,:send
  undef_method  :singleton_method_added,:singleton_method_removed
  undef_method  :singleton_method_undefined,:singleton_methods
  undef_method  :to_a,:to_s,:type
end


# Testing
class Leaf
  attr_accessor :animal
end
class Node
  attr_accessor :c1,:c2
end
a = Role.new(Leaf.new)
puts a.inspect
puts a.class
b = Role.new(Leaf.new)
a.__role__=Node.new
a.c1=b
puts a.inspect
puts a.class