From: skaller <skaller@users.sourceforge.net>
To: Remi Vanicat <remi.vanicat@laposte.net>
Cc: caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] Documentation error - #myvariant
Date: 30 Apr 2004 04:09:45 +1000 [thread overview]
Message-ID: <1083262171.9537.1395.camel@pelican.wigram> (raw)
In-Reply-To: <8765bjvtx6.dlv@vanicat.homelinux.org>
On Thu, 2004-04-29 at 22:40, Remi Vanicat wrote:
> > But this is not correct! Consider
> >
> > type de = [`D | `E of de];;
> >
> > type def = [`D | `E of def | `F of def];;
> In fact, your code will do what you want if you don't define your type
> as recursive but as polymorphic :
>
> type 'a de = [`D | `E of 'a];;
>
> type 'a def = [`D | `E of 'a | `F of 'a];;
type 'a de' = [`D | `E of 'a]
type 'a def' = ['a de' | `F of 'a]
type de = 'a de' as 'a
type def = 'a def' as 'a
--
John Skaller, mailto:skaller@users.sf.net
voice: 061-2-9660-0850,
snail: PO BOX 401 Glebe NSW 2037 Australia
Checkout the Felix programming language http://felix.sf.net
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prev parent reply other threads:[~2004-04-29 18:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-29 11:18 Keith Wansbrough
2004-04-29 12:40 ` Remi Vanicat
2004-04-29 13:54 ` Keith Wansbrough
2004-04-29 18:09 ` skaller [this message]
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