From: Gabriel Scherer <gabriel.scherer@gmail.com>
To: Goswin von Brederlow <goswin-v-b@web.de>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] How do I declare a value of 'a t instead of '_a t in a module?
Date: Sun, 6 May 2012 12:58:57 +0200 [thread overview]
Message-ID: <CAPFanBGzc4HLU8Xx_-cY58BpUxGtSDSu4750cJf=FodQtu51AA@mail.gmail.com> (raw)
In-Reply-To: <87fwbdsidx.fsf@frosties.localnet>
I agree this could be a good item in the FAQ. I have created an issue
on the bugtracker for this.
http://caml.inria.fr/mantis/view.php?id=5607
Do not hesitate to comment on the bug: suggestions of wording are
warmly welcome.
On Sun, May 6, 2012 at 12:39 PM, Goswin von Brederlow <goswin-v-b@web.de> wrote:
> Gabriel Scherer <gabriel.scherer@gmail.com> writes:
>
>> You need to specify in the signature that ('a t) is contravariant:
>> type +'a t
>
> Thanks, that was what I was looking for. Why can I never find this in
> the docs when I need it? :)
>
> MfG
> Goswin
prev parent reply other threads:[~2012-05-06 10:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-05 15:37 Goswin von Brederlow
2012-05-05 15:54 ` Gabriel Scherer
2012-05-06 10:39 ` Goswin von Brederlow
2012-05-06 10:58 ` Gabriel Scherer [this message]
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