From: Yukihiro Matsumoto <matz@...>
Date: 2008-08-25T18:28:17+09:00
Subject: Re: Why NameError ??

Hi,

In message "Re: Why NameError ??"
    on Mon, 25 Aug 2008 17:54:00 +0900, Kyung won Cheon <kdream95@gmerce.co.kr> writes:

|module M1
|  class A
|  end
|end
|
|module M2
|  class A
|  end
|  p A                         # M2::A
|  class B
|    p A                       # M2::A
|  end
|end
|
|module M3
|  include M1
|  p A                         # M1::A
|  class B
|    p A                       # NameError (M3::B::A)
|  end
|end

Constant look-up goes self -> surrounding -> super (until Object).
So, from M3, look-up goes M3 -> M1 (A defined here).  From M3::B,
B -> M3 -> Object (no A found).

							matz.