From: Virgile Prevosto <virgile.prevosto@m4x.org>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] any types in signatures of functor arguments
Date: Tue, 25 Oct 2005 10:53:45 +0200 [thread overview]
Message-ID: <20051025105345.319f8366@aloxe.inria.fr> (raw)
In-Reply-To: <20051025.112220.68541121.keiko@kurims.kyoto-u.ac.jp>
Le mar 25 oct 2005 11:22:20 CEST, Keiko Nakata <keiko@kurims.kyoto-
u.ac.jp> a ecrit:
> So it seems that I cannot avoid modifying modules to which F is
> applied. Actually, I already written several modules, say M and N, in
> separate files. Later, I defined the functor F so as to apply it to
> the modules M and N. I thought that it would be nice if I can avoid
> modifying the implementations and interface files of M and N,
> since it will affect other parts of my program.
>
It might be possible to only modify the arguments you give to F, with
the use of include:
module M = struct let f (`A x) = x end
module F(X:sig type s type t = [ `A of s] val f: t -> int end) =
struct let f = function `A _ as a -> X.f a | `B -> 0
end;;
module FM = F(struct include M type s = int type t = [ `A of s ])
--
E tutto per oggi, a la prossima volta
Virgile
next prev parent reply other threads:[~2005-10-25 8:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-24 8:51 Keiko Nakata
2005-10-24 14:08 ` [Caml-list] " Brian Hurt
2005-10-25 2:22 ` Keiko Nakata
2005-10-25 8:53 ` Virgile Prevosto [this message]
2005-10-25 9:49 ` Keiko Nakata
2005-10-25 10:08 ` fva en UMBRIEL
2005-10-25 12:15 ` Hendrik Tews
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