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[Caml-list] marshalling polymorphic variants
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Date: -- (:)
From: henri dubois-ferriere <henridf@g...>
Subject: Re: [Caml-list] marshalling polymorphic variants
actually i'm not the kind who tries to subvert the type system ;)

the scenario is as follows: an application saves state using some
polymorphic variants.
later the application has grown and adds more polymorphic variants to
the 'vocabulary' of state it might read in.
so, i wanted to be sure that the later application could still read
the earlier variants in a safe manner.

henri

On Tue, 29 Jun 2004 19:50:28 +0200, Alex Baretta <alex@baretta.com> wrote:
> 
> Richard Jones wrote:
> > On Mon, Jun 28, 2004 at 11:02:25PM +0200, henri dubois-ferriere wrote:
> >
> >>hi,
> >>in the simple case below, it is possible to marshal out a ([`A | `B]
> >>list), and then read it back as a [> `A | `B | `C] list.
> >>
> >>can this behavior be counted on , or is it not something an
> >>application can assume to always work?
> >
> >
> > Better to use Obj.magic if you're explicitly trying to subvert the
> > type system?
> >
> > Rich.
> >
> 
> It's better to use C if you are explicitly trying to subvert the type
> system...
> 
> Alex
> 
> 
> 
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