From: Maxence Guesdon <Maxence.Guesdon@inria.fr>
To: Jeremy Yallop <yallop@gmail.com>
Cc: Caml List <caml-list@inria.fr>
Subject: Re: [Caml-list] mixing GADTs and first class modules
Date: Wed, 18 Mar 2015 11:28:00 +0100 [thread overview]
Message-ID: <20150318112800.35998716@alcazar2> (raw)
In-Reply-To: <CAAxsn=G1BYLcQs9R9zNnTUk6fXCEMsHeWGNB+AmhQQXCxFg-CQ@mail.gmail.com>
On Wed, 18 Mar 2015 10:24:34 +0000
Jeremy Yallop <yallop@gmail.com> wrote:
> On 18 March 2015 at 10:19, Maxence Guesdon <Maxence.Guesdon@inria.fr> wrote:
> > module type M = sig type t end;;
> > type _ foo = T : (module M) -> M.t foo;;
> >
> > but it does not seem so, as I can't refer to type t of the module
> > parameter:
> > Error: Unbound type constructor M.t
> >
> > Is there a workaround ?
>
> Yes:
>
> type _ foo = T : (module M with type t = 'a) -> 'a foo
Nice, thanks !
- m
prev parent reply other threads:[~2015-03-18 10:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-18 10:19 Maxence Guesdon
2015-03-18 10:24 ` Jeremy Yallop
2015-03-18 10:28 ` Maxence Guesdon [this message]
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