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[Caml-list] about Obj.magic
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Date: 2002-05-31 (14:07)
From: Warp <warplayer@f...>
Subject: Re: [Caml-list] about Obj.magic
> > One case can be 'almost-legal' : downcasting an object to its
> > class if you're sure that it has been previously upcasted to the
> > type class.
> >
> And here is how to break your code:
> class c = object method a : unit end
> let i = new_intf (new c)

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

Nicolas Cannasse

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