From: "ernie (Ernie Miller)" <ernie@erniemiller.org>
To: ruby-core@ruby-lang.org
Subject: [ruby-core:50356] [ruby-trunk - Bug #7475][Open] Unexpected behavior of Module#append_features on singleton class
Date: Fri, 30 Nov 2012 10:56:28 +0900 [thread overview]
Message-ID: <redmine.issue-7475.20121130105621@ruby-lang.org> (raw)
Issue #7475 has been reported by ernie (Ernie Miller).
----------------------------------------
Bug #7475: Unexpected behavior of Module#append_features on singleton class
https://bugs.ruby-lang.org/issues/7475
Author: ernie (Ernie Miller)
Status: Open
Priority: Normal
Assignee:
Category:
Target version: 1.9.3
ruby -v: ruby 1.9.3p327 (2012-11-10 revision 37606) [x86_64-darwin12.2.0]
A more involved explanation is available at http://erniemiller.org/2012/11/29/ruby-tidbit-include-vs-extend-with-module-class-variables/
In short, the handling of class variables (and constants) when a module is extended vs included is not as expected.
Example:
module Foo
@@foo = 'foo'
end
class Bar
include Foo
end
class Baz
extend Foo
end
Bar.class_variable_get :@@foo # => "foo"
Baz.singleton_class.class_variable_get :@@foo # => NameError: uninitialized class variable @@foo in Class
We would expect constant and class variable lookup on the singleton class to work, but it doesn't. Both Rubinius and JRuby seem to behave as expected in this case.
Thanks!
--
http://bugs.ruby-lang.org/
next reply other threads:[~2012-11-30 2:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-30 1:56 ernie (Ernie Miller) [this message]
2012-11-30 13:51 ` [ruby-core:50394] [ruby-trunk - Bug #7475] Unexpected behavior of Module#append_features on singleton class ernie (Ernie Miller)
2013-02-17 23:52 ` [ruby-core:52405] " ko1 (Koichi Sasada)
2013-02-18 1:47 ` [ruby-core:52425] " nobu (Nobuyoshi Nakada)
2019-08-15 15:28 ` [ruby-core:94367] [Ruby master Bug#7475] " merch-redmine
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