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[Caml-list] Multiparameter functors?
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Date: -- (:)
From: Matt Gushee <mgushee@h...>
Subject: Re: [Caml-list] Multiparameter functors?
On Sun, Dec 21, 2003 at 07:30:27PM -0500, Brian Hurt wrote:
> Is it possible to do multi-parameter functors?  What I want to be able to 
> so is something like:
> module Make(Key: Map.OrderedType, Pri: Map.OrderedType) = struct
> 	type key = Key.t;;
> 	type pri = Pri.t;;
> 	...
> end;;
> Am I being stupid and just missing something obvious,

Is there anything obvious about functors? ;-)

I've found the following syntax to work:

  module Make =
    functor (Key:Map.OrderedType) -> functor (Pri:Map.OrderedType) ->

... though I'm not qualified to comment on the merits of doing or not
doing this.

Matt Gushee                 When a nation follows the Way,
Englewood, Colorado, USA    Horses bear manure through           its fields;   When a nation ignores the Way,
                            Horses bear soldiers through
                                its streets.
                            --Lao Tzu (Peter Merel, trans.)

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