From: Christophe TROESTLER <Christophe.Troestler+ocaml@umh.ac.be>
To: Richard Jones <rich@annexia.org>
Cc: OCaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] What does underscore mean in this type expression?
Date: Sat, 30 Aug 2008 13:38:31 +0200 (CEST) [thread overview]
Message-ID: <20080830.133831.122629365592826302.Christophe.Troestler+ocaml@umh.ac.be> (raw)
In-Reply-To: <20080830112718.GA25303@annexia.org>
On Sat, 30 Aug 2008 12:27:18 +0100, Richard Jones wrote:
>
> val get_domains :
> (_[> `R ] as 'a) Connect.t ->
> is not included in
> val get_domains :
> ([> `R ] as 'a) Connect.t ->
>
> This syntax doesn't appear to be documented in the manual (unless it's
> related to '_a). What does it mean?
It is a weak type as you guessed. To convince you of that, here is
some code:
# let x = ref `X;;
val x : _[> `X ] ref = {contents = `X}
Cheers,
C.
next prev parent reply other threads:[~2008-08-30 11:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-30 11:27 Richard Jones
2008-08-30 11:38 ` Christophe TROESTLER [this message]
2008-08-30 13:03 ` [Caml-list] " Richard Jones
2008-08-30 13:57 ` Christophe TROESTLER
2008-08-30 19:29 ` Richard Jones
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