From: Trans <transfire@...>
Date: 2005-04-29T22:09:33+09:00
Subject: Re: instance/class_eval

Bertram Scharpf wrote:
> Hi, experts,
>
> how can I find out what my current class context is?
> I say:
>
>     class C ; end
>     C.instance_eval { def f ; "f" ; end }
>     C.f
>       #=> "f"
>
>     class D ; end
>     D.class_eval { def f ; "f" ; end }
>     D.new.f
>       #=> "f"
>
> Obviously the method will be put into another context
> either. I would like to be able to ask what the context is
> _before_ I define the method. `self' seems to be the same in
> both cases.
>
> Sorry, it's my itch that I want to know the whole truth.

I assume you mean:

  C.instance_eval { self } == C.class_eval { self }

And you are right, self is the same for both contexts. I believe the
question is the same as asking if it is possible to detect the
idioclass b/c the idioclass of the class_eval context is the
instance_eval context.

  class C
    class << self
      # this is C.instance_eval { self }
    end
    # this is C.class_eval { self }
  end

That being the case, see the new thread: determining when inside 'class
<< self'.

T.