From: "Florian Groß" <florgro@...>
Date: 2005-04-29T21:30:40+09:00
Subject: Re: determining when inside 'class << self'

Mark Hubbart wrote:

> To expand on that... metaclasses have a peculiar inspect value. This
> code is breakable, but probably only if you try to:
> 
> [...]
> 
> There's probably a safer way to do this using ruby/dl, or evil.rb. I
> don't know, though.

I'm not sure if you consider this safer, but while you can subclass 
anonymous and normal classes you can not do so for idioclasses so this 
ought to work:

class Class
   def idioclass?()
     Class.new(self)
     return true
   rescue TypeError
     return false
   end
end

Of course somebody /could/ raise a TypeError in the inherited hook, but 
that is quite unlikely to happen.

evil-ruby can of course check the actual RTYPE of the class which is 
unbreakable, but that is a dependency you might not want to have.