From: "Warp" <warplayer@free.fr>
To: "Jacques Garrigue" <garrigue@kurims.kyoto-u.ac.jp>,
"OCaml" <caml-list@inria.fr>
Subject: Re: [Caml-list] about Obj.magic
Date: Fri, 31 May 2002 16:06:00 +0200 [thread overview]
Message-ID: <00b401c208ac$4d0eae00$7900a8c0@warp> (raw)
In-Reply-To: <20020531225840C.garrigue@kurims.kyoto-u.ac.jp>
> > One case can be 'almost-legal' : downcasting an object to its
implementation
> > class if you're sure that it has been previously upcasted to the
interface
> > type class.
> >
> And here is how to break your code:
>
> class c = object method a : unit end
> let i = new_intf (new c)
>
True.
In fact that sample can't be used if the class also use shadow types which
prevents the user from writing his own class and then making the program
crash.
Nicolas Cannasse
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next prev parent reply other threads:[~2002-05-31 14:07 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-30 21:09 dengping zhu
2002-05-30 22:38 ` Jacques Garrigue
2002-05-31 4:00 ` Daniel de Rauglaudre
2002-05-31 5:37 ` Oleg
2002-05-31 6:17 ` Daniel de Rauglaudre
[not found] ` <p05100300b91cea02dbf5@[192.168.1.22]>
2002-05-31 9:50 ` [Caml-list] SML->OCaml (was: about Obj.magic) Daniel de Rauglaudre
2002-05-31 15:39 ` [Caml-list] about Obj.magic dengping zhu
2002-05-31 16:28 ` John D. Barnett
2002-06-01 8:37 ` Jacques Garrigue
2002-06-01 16:00 ` dengping zhu
2002-06-01 17:20 ` Pierre Weis
2002-05-31 9:17 ` Warp
2002-05-31 13:58 ` Jacques Garrigue
2002-05-31 14:06 ` Warp [this message]
2002-05-31 18:21 ` John Max Skaller
2002-06-01 17:42 ` Pierre Weis
2002-06-02 15:15 ` John Max Skaller
[not found] ` <D37FA3E3-763B-11D6-BE8F-0003938819CE@inria.fr>
2002-06-04 10:22 ` Pierre Weis
2002-05-31 14:10 ` Remi VANICAT
2002-05-31 16:19 ` Christophe TROESTLER
2002-05-31 18:06 ` Olivier Andrieu
2002-05-31 22:03 ` Christophe TROESTLER
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