Srdjan Marinovic wrote:
> I've got a following problem: when I do
> 
> instance_eval do
>  class T
>  end
> end

This works because the context of the block is used to create T.

> (i'm doing this in irb, so self is main)
> 
> everything is fine, I get a new class T.
> However when I do
> 
> instance_eval "class T; end"
> 
> I do not get a new class T. even though no errors were reported. Is
> there any particular reason for this?

T is nested into the singleton class of main, you could use
   instance_eval "class ::T; end"
to create a top level class.

But I don't understand why you use instance_eval, why not just eval?

-- 
Florian Frank