From: Robert Klemme <bob.news@...>
Date: 2005-01-28T01:10:56+09:00
Subject: Re: Duping a class causes error


"Trans" <transfire@gmail.com> schrieb im Newsbeitrag
news:1106841626.063762.97840@f14g2000cwb.googlegroups.com...
> Correct!

Yippieh!

> Unfortunately you were a minute late on the buzzer so we can only off
> you the consolation prize --a virtual pat on the back. "pat, pat" :-)

Darn...

> But seriously, thanks robert, your questioning spurred me to dig in and
> find the problem. And its a good thing to remember!

Glad I could help.  Btw, why is it that you dup classes?  It seems strange
to me and there might some dangers, especially if those classes to be
duped refer each other:

>> class Foo; end
=> nil
>> class Bar; XX = Foo; end
=> Foo
>> Bar::XX
=> Foo
>> Bar::XX == Foo
=> true
>> bd = Bar.dup
=> #<Class:0x10181848>
>> bd::XX
=> Foo
>> bd::XX == Foo
=> true
>> class Box; def test() Foo; end end
=> nil
>> Box.new.test
=> Foo
>> Box.dup.new.test

Even Marshal doesn't help:

=> Foo>> Marshal::load(Marshal::dump(Box)).new.test == Foo
=> true
>> Marshal::load(Marshal::dump(Bar))::XX == Foo
=> true

Kind regards

    robert