From: matz@... (Yukihiro Matsumoto)
Date: 2003-08-07T04:52:35+09:00
Subject: Re: instance_eval and Class Variables

Hello,

In message "instance_eval and Class Variables"
    on 03/08/06, Tim Bates <tim@bates.id.au> writes:

|The previous email had "instance_eval" in the title, because I meant to
|include the contents of this mail in it but then didn't. It actually
|used module_eval, although it makes no difference. This one is a
|separate problem:

|irb(main):004:0> Klass.instance_eval{ puts @@foo }
|NameError: uninitialized class variable @@foo in Object
|        from (irb):4
|        from (irb):4:in `instance_eval'
|        from (irb):4:in `instance_eval'
|        from (irb):4

This is normal.  Class variables are resolved using static scope.

|irb(main):005:0> Klass.module_eval{ puts @@foo }
|NameError: uninitialized class variable @@foo in Object
|        from (irb):5
|        from (irb):5:in `module_eval'
|        from (irb):5:in `module_eval'
|        from (irb):5

You've found a bug in module_eval.  Sorry for inconvenience. 

							matz.