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Date: Mon, 22 Dec 2003 15:58:59 -0800
From: David Brown <caml-list@davidb.org>
To: Ocaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] Multiparameter functors?
Message-ID: <20031222235859.GA4791@davidb.org>
References: <Pine.LNX.4.44.0312211927320.3749-100000@guestc.h0020780e8acd.ne.client2.attbi.com> <20031222230415.GA1145@swordfish>
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> On Mon, Dec 22, 2003 at 04:04:15PM -0700, Matt Gushee wrote:
>
> > Is there anything obvious about functors? ;-)
> > 
> > I've found the following syntax to work:
> > 
> >   module Make =
> >     functor (Key:Map.OrderedType) -> functor (Pri:Map.OrderedType) ->
> >       struct
> >         ....
> >       end;;
> 
> This is very similar to currying of functions, except that Ocaml doesn't
> give you nice convenient syntax for defining curried functors.  The
> application is similar to currying, though.
> 
>   module Mine = Make (Keytype) (Pritype)

And, I'm not even right.  Module definitions can also be curried:

  module Make (Key : Map.OrderedType) (Pri : Map.OrderedType) =
    struct
      ...
    end

Dave

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