From: TPReal <tpreal@...>
Date: 2008-08-10T07:02:58+09:00
Subject: Re: I don't know why!!

On Aug 8, 3:57 am, Kyung won Cheon <kdrea...@gmerce.co.kr> wrote:
> -- test1.rb --
>
> module M
>   module MM
>     class C
>     end
>
>     class D < MM::C
>     end
>
>     class E < MM::C; puts self; end
>   end
> end
>
> # => M::MM::E
>
> -- test2.rb --
>
> module M
>   module MM
>     class C
>     end
>
>     class D < MM::C
>     end
>
>     #class E < MM::C; puts self; end
>   end
> end
>
> M::MM.module_eval("class E < MM::C; puts self; end")
>
> # => uninitialized constant M::MM::MM (NameError)
>
> -- test3.rb --
>
> module M
>   module MM
>     class C
>     end
>
>     class D < MM::C
>     end
>
>     #class E < MM::C; puts self; end
>   end
> end
>
> M::MM.module_eval("class E < C; puts self; end")
>
> # => M::MM::E
>
> ###################
> # test2.rb ???
> ###################
> --
> Posted viahttp://www.ruby-forum.com/.

Well, it's simple, if you say MM::C inside an M::MM's module_eval,
then it means M::MM::MM::C, and this is undefined. When you say Temp
\dir from inside C:\Temp, then it means C:\Temp\Temp\dir.