From: Shugo Maeda <redmine@...>
Date: 2009-10-22T16:40:21+09:00
Subject: [ruby-core:26225] [Bug #2253] should Class.new(Class) raise TypeError?

Bug #2253: should Class.new(Class) raise TypeError?
http://redmine.ruby-lang.org/issues/show/2253

Author: Shugo Maeda
Status: Open, Priority: Low
ruby -v: ruby 1.9.2dev (2009-10-12 trunk 25313) [i686-linux]

Class.new(Class) does not raise TypeError as reported in [ruby-dev:34114].

$ ruby-1_8 -ve 'Class.new(Class)'      
ruby 1.8.8dev (2009-10-22 revision 25430) [i686-linux]
$ ruby-1_8 -ve 'class Foo < Class; end'
ruby 1.8.8dev (2009-10-22 revision 25430) [i686-linux]
-e:1: can't make subclass of Class (TypeError)

$ ruby-trunk -ve 'Class.new(Class)'   
ruby 1.9.2dev (2009-10-12 trunk 25313) [i686-linux]
$ ruby-trunk -ve 'class Foo < Class; end'
ruby 1.9.2dev (2009-10-12 trunk 25313) [i686-linux]
-e:1:in `<main>': can't make subclass of Class (TypeError)

# JRuby also works same as MRI.  awesome.

should it raise TypeError?

FYI, in [ruby-list:8341], Matz said that he tried to
allow subclassing of Class but he couldn't do it for
implementation reason.


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