From: Clifford Heath <no@...>
Date: 2008-02-13T08:44:58+09:00
Subject: Re: Subclassing Integer; solved!

Clifford Heath wrote:
> It'd be nice if it was possible...

This seems to work, requiring only a minimal adjustment
by callers to subclass Int instead of Integer:

class Int
  def initialize(i)
    @__value = i.to_i
  end

  private
  attr_accessor :__value

  def method_missing(meth, *args, &block)
    @__value.send meth, *args, &block
  end

  public
  alias __respond_to respond_to?
  def respond_to?(m, p = false)
    __respond_to(m, p) || @__value.respond_to?(m, p)
  end
end

Clifford Heath.