From: Dave Baldwin <dave.baldwin@3dlabs.com>
Date: 2007-10-09T16:40:25+09:00
Subject: Re: Accessing class variables in method made using define_method


On 8 Oct 2007, at 17:28, Rick DeNatale wrote:

> On 10/8/07, ara.t.howard <ara.t.howard@gmail.com> wrote:
>>
>> On Oct 8, 2007, at 9:16 AM, Dave Baldwin wrote:
>>
>>> 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
>              NOTE @@
>>> end
>>>
>>> A.class_eval {define_method(:foo){puts @aa}}
>
>       NOTE @

Yeah, a typo however the problem I want to solve still exists in that  
a method added to a class using define_method doesn't have the same  
scope as a method added using def...end.  Both can call other methods  
in the class and access instance variables but define_method is  
prevented from accessing class variables.  This was a surprise to me.


<snipped examples of instance, class and class instance varialbes>

Dave.