From: Geoffrey Alan Washburn <geoffw@cis.upenn.edu>
To: caml-list@inria.fr
Cc: caml-list@yquem.inria.fr
Subject: Re: OO design
Date: Tue, 09 May 2006 22:41:15 -0400 [thread overview]
Message-ID: <446152CB.5010605@cis.upenn.edu> (raw)
In-Reply-To: <445FB9C7.4040703@cs.washington.edu>
Dan Grossman wrote:
> Phantom types are a programming idiom that can often pull off this sort
> of thing.
Maybe I'm just not smart enough, but I can't seem to think of a way to
do this in an effectful language without getting bitten by aliasing. In
a purely functional setting, a monadic approach seems plausible, but if
you can create a "ref" anywhere, as in OCaml, it seems straightforward
to subvert any uses of phantom types for implementing protocols. I
suppose one could look at it from the angle that phantom types make it
harder for cooperative users to make mistakes, but I can't see how they
can prevent the need for runtime checks.
next prev parent reply other threads:[~2006-05-10 2:42 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-05 9:35 David Baelde
2006-05-05 10:47 ` [Caml-list] " Gerd Stolpmann
2006-05-05 13:00 ` Remi Vanicat
2006-05-05 19:32 ` Andrej Bauer
2006-05-08 3:17 ` Jacques Garrigue
2006-05-08 21:29 ` David Teller
2006-05-08 21:36 ` Dan Grossman
2006-05-10 2:41 ` Geoffrey Alan Washburn [this message]
2006-05-10 16:17 ` [Caml-list] " Dan Grossman
2006-05-10 18:15 ` Geoffrey Alan Washburn
2006-05-10 18:44 ` [Caml-list] " Dan Grossman
2006-05-10 18:35 ` Shawn
2006-05-10 18:47 ` Till Varoquaux
2006-05-10 19:01 ` Shawn
2006-05-10 18:43 ` brogoff
2006-05-11 0:08 ` Geoffrey Alan Washburn
2006-05-11 5:45 ` [Caml-list] " Till Varoquaux
2006-05-11 6:21 ` Jacques Garrigue
2006-05-11 15:48 ` Geoffrey Alan Washburn
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=446152CB.5010605@cis.upenn.edu \
--to=geoffw@cis.upenn.edu \
--cc=caml-list@inria.fr \
--cc=caml-list@yquem.inria.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).