From: Ara.T.Howard@...
Date: 2005-05-04T21:36:01+09:00
Subject: Re: un_metaclass

On Wed, 4 May 2005, Mark Hubbart wrote:

> Ugh. I hadn't thought about the metaclasses of classes, or the metaclasses
> of metaclasses of classes. The code will work for any non-class object,
> though, I think.

the only reason i did is that i needed

   class C
     trait 'a'

     class << self
       trait 'a'
     end
   end

to behave differently and both need a handle on 'C' (sorta like superclass) to
do so.

> I'm not sure how to do this. Some ugly hacking might make it work, but it
> wouldn't be correct. It can probably only be done correctly with C or DL. I
> hated parsing the inspect output anyway, there was something just *wrong*
> about that. :)

yeah i still want a better solution.  this is what i use now:

   class Class
     def inside_metaclass?
       self.inspect =~ %r/^#<Class:/ ? true : false
     end
     def metaclass
       if inside_metaclass?
         self
       else
         class << self; self; end
       end
     end
     def instance_class
       m = %r/^(?:#<Class:)+(.*?)(>+)$/io.match inspect
       if m
         klass_name, brackets = m[1], m[2]
         n = brackets.size - 1
         klass = const_get klass_name
         n.times{ klass = class << klass; self; end }
         klass
       else
         superclass
       end
     end
   end

it's specific to my need but i'm thinking of putting together an RCR.

cheers.

-a
-- 
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