From: Mike Potanin <potanin@mccme.ru>
To: caml-list@inria.fr
Subject: Re: [Caml-list] let rec
Date: Sat, 18 Jan 2003 18:31:13 +0300 (MSK) [thread overview]
Message-ID: <Pine.LNX.4.44.0301181822440.723-100000@mccme.ru> (raw)
In-Reply-To: <9D69A846-2ADD-11D7-AFEF-0003930FCE12@inria.fr>
On Sat, 18 Jan 2003, Damien Doligez wrote:
> On Thursday, January 16, 2003, at 03:38 PM, Mike Potanin wrote:
>
> > The similar problem arises in a case
> > let ring l = let rec r = l@r in r
> > OCaml type system can not understand that the design is safe.
>
> But it is not unconditionally safe. Its safety depends on how
> you defined the @ function. O'Caml doesn't want to look at
> the definition of @ because separate compilation is a very
> important feature.
If extend type model compiler can handle this case. The type of @ function
may content information "this function is realy lazy for second argument".
This don't handle all case recurcive data, but impotant case.
Mercury language don't handle all "modes" too :-).
>
> -- Damien
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next prev parent reply other threads:[~2003-01-18 15:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-15 19:15 Vitaly Lugovsky
2003-01-15 19:27 ` james woodyatt
2003-01-15 19:54 ` Vitaly Lugovsky
2003-01-15 19:53 ` Max Kirillov
2003-01-16 14:38 ` Mike Potanin
2003-01-18 12:08 ` Damien Doligez
2003-01-18 15:31 ` Mike Potanin [this message]
2003-01-18 19:22 ` Vitaly Lugovsky
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