From: Nobuyoshi Nakada <nobu@...>
Date: 2013-10-31T13:26:54+09:00
Subject: [ruby-core:58093] Re: [ruby-trunk - Feature #9064] Add support for packages, like in Java

(13/10/31 5:15), David MacMahon wrote:
> On a semi-related note, I find it mildly frustrating that all openings of a class requires specifying the same superclass.  Sometimes I just want to add a constant or simple method to a class, so it would be nice to be able to re-open that class without having to explicitly specify the same superclasses every time.  It would be nice if the following were allowed:
> 
> class Foo < Bar; end # class Foo extends Bar
> class Foo; end       # class Foo still extends Bar

This is allowed already.

> class Foo; end       # class Foo has Object as a "stand-in" superclass
> class Foo < Bar; end # class Foo replaces Bar as its "official" superclass

If it is allowed,

  class C; end
  c = C.new
  class C < String; end
  c.size # will segfault

with the current object system.

-- 
Nobu Nakada