From: Jon Harrop <jon@ffconsultancy.com>
To: caml-list <caml-list@inria.fr>
Subject: Re: [Caml-list] How important are circular lists/recursive objects?
Date: Tue, 3 Apr 2007 13:09:07 +0100 [thread overview]
Message-ID: <200704031309.08302.jon@ffconsultancy.com> (raw)
In-Reply-To: <4611FBAB.1020508@fmf.uni-lj.si>
On Tuesday 03 April 2007 08:00, Andrej Bauer wrote:
> Brian Hurt wrote:
> > Does anyone actually use this construct, and if so, for what?
>
> When I teach my students "theory" of programming languages, we write
> interpreters for mini languages. The recursive data structures are used
> to create closures of recursive functions, environments that contain
> mutually recursive values, closures of objects, etc. Life would be very
> hard without this feature.
There is a nice example here:
http://www.ffconsultancy.com/ocaml/benefits/interpreter.html
Specifically, in the "eval" function:
| ELetRec(var, arg, body, rest) ->
let rec vars = (var, VClosure(arg, vars, body)) :: vars in
eval vars rest
--
Dr Jon D Harrop, Flying Frog Consultancy Ltd.
OCaml for Scientists
http://www.ffconsultancy.com/products/ocaml_for_scientists
next prev parent reply other threads:[~2007-04-03 12:14 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-02 23:55 Brian Hurt
2007-04-03 6:24 ` Gleb Alexeyev
2007-04-03 6:58 ` [Caml-list] " Ville-Pertti Keinonen
2007-04-03 7:00 ` Andrej Bauer
2007-04-03 12:09 ` Jon Harrop [this message]
2007-04-03 13:31 ` Bruno De Fraine
2007-04-04 23:28 ` Brian Hurt
2007-04-05 0:51 ` Jon Harrop
2007-04-03 12:49 ` Philippe Wang
2007-04-04 3:52 ` Stefan Monnier
2007-04-04 5:28 ` [Caml-list] " skaller
2007-10-04 17:48 ` Fabrice Marchant
2007-10-04 20:39 ` skaller
2007-10-04 21:36 ` rossberg
2007-10-04 22:25 ` skaller
2007-10-05 10:42 ` Dominique Martinet
2007-10-08 9:57 ` Andreas Rossberg
2007-04-04 8:45 ` Don Syme
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