From: Laurent Vibert <lvibert@irisa.fr>
To: Jacques Garrigue <garrigue@kurims.kyoto-u.ac.jp>
Cc: frisch@clipper.ens.fr, caml-list@inria.fr
Subject: Re: [Caml-list] Comments on type variables
Date: Tue, 11 Jun 2002 15:09:08 +0200 (MET DST) [thread overview]
Message-ID: <Pine.GSO.4.21.0206111456550.432-100000@lawson.irisa.fr> (raw)
In-Reply-To: <20020607192355Y.garrigue@kurims.kyoto-u.ac.jp>
On Fri, 7 Jun 2002, Jacques Garrigue wrote:
> > Interaction with local modules
> > ------------------------------
> >
> > Inside a local module, type variables introduced outside the module are
> > invisible:
> >
> > # let f (x : 'a) =
> > let module M = struct type t = 'a list end in ();;
> > Unbound type parameter 'a
>
> To be expected by the rules above. Functions with local modules are
> not functors. 'a is not a type constructor.
this has a draw-back : some local modules don't have any valid
signature :
for exemple, what is the signature of the module M ?
let f (x:'a) =
let module M = struct let v = x end
in ...
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next prev parent reply other threads:[~2002-06-11 13:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-06 17:04 Alain Frisch
2002-06-07 7:07 ` Francois Pottier
2002-06-07 10:23 ` Jacques Garrigue
2002-06-11 13:09 ` Laurent Vibert [this message]
2002-06-09 17:29 ` Pierre Weis
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