From: Dave Baldwin <dave.baldwin@3dlabs.com>
Date: 2007-10-09T00:16:25+09:00
Subject: Accessing class variables in method made using define_method

I want to use class variables and have them accessible from class  
methods that have been defined outside of the class using  
define_method or something similar.  When I try this the class  
variable isn't in scope.  A simple test case is:

class A
	@@aa = 20
end

A.class_eval {define_method(:foo){puts @aa}}

a = A.new
a.foo			=> nil and not 20 as expected

or using

A.send(:define_method, :foo){puts @aa}
a.foo			=> nil and not 20 as expected

gives the same result but

class A
	def foo
		puts @@aa
	end
end

a.foo			=> 20 as expected.

How do I get the same behaviour as opening the class and defining the  
method normally?

Thanks,

Dave.