From: "Mr. Herr" <misterherr@freenet.de>
To: caml-list@inria.fr
Subject: Re: [Caml-list] Cyclic type abbreviation
Date: Fri, 13 Nov 2015 14:15:01 +0100 [thread overview]
Message-ID: <5645E255.5060900@freenet.de> (raw)
In-Reply-To: <5645DC49.7050106@tu-berlin.de>
On 13.11.2015 13:49, Christoph Höger wrote:
> Dear all,
>
> why is this type cyclic?
>
> type node = int * tree * tree
> and tree = node option
>
> I cannot introduce a manifest for the option type, as there is no Option
> module (why is that, btw?) - so I would assume option to be special
> enough to be handled like any other algebraic data type.
type 'a option = None | Some 'a
no need for a module, just a simple type. Maybe you confound it with other languages.
And cyclic - well, the types are referring to each other.
Summary: what is supposedly wrong with it?
/Str.
next prev parent reply other threads:[~2015-11-13 13:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-13 12:49 Christoph Höger
2015-11-13 13:15 ` Mr. Herr [this message]
2015-11-13 13:37 ` David Allsopp
2015-11-13 13:46 ` Romain Bardou
2015-11-13 14:24 ` Romain Bardou
2015-11-16 5:43 ` Ben Millwood
2015-11-16 16:42 ` peterfrey
2015-11-16 17:08 ` Pierrick Couderc
2015-11-13 13:46 ` Christoph Höger
2015-11-13 13:53 ` Mr. Herr
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=5645E255.5060900@freenet.de \
--to=misterherr@freenet.de \
--cc=caml-list@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).