From: Trans <transfire@...>
Date: 2008-02-27T21:06:59+09:00
Subject: Re: Delegate to allow subclassing Integer, Float

On Feb 26, 11:24 pm, Clifford Heath <n...@spam.please.net> wrote:
> I have the following code using facets/basicobject with 1.8,
> and want to know what the equivalent would be for 1.9:
>
> class Real < BasicObject
>   def initialize(r)
>     @__value = r.to_f
>   end
>
>   define_method(:class) { __self__.class }
>
>   def send(meth, *a, &b)
>     # Ensure that normal sends go to __self__, not @__value
>     __self__.send(meth, *a, &b)
>   end
>
>   private
>   def method_missing(meth, *args, &block)
>     @__value.send meth, *args, &block
>   end
> end
>
> (and similar, defining Int for integers).
>
> This seems to be ok with 1.8, but 1.9 doesn't have __self__.
>
> Any thoughts?

I'm surprised to see __send__ and class are not defined, since it is
easy enough to override them if need be.  Creating them from scratch
is a bit tricky --in fact for #class how is it even possible?

Well, not perfect, but you can do:

  def class; Real; end

as long as Real won't be subclassed; and

  require 'facets/kernel/as'

  def send(meth, *a, &b)
    send_as(BasicObject, meth, *a, &b)   # or
as(BasicObject).send(meth, *a, &b)
  end

But why do you not want send to route to method_missing, after all
what other methods are there to call?

T.