From: Tom Hirschowitz <hirschow@mouton.inria.fr>
To: caml-list@inria.fr
Subject: Re: circular types?
Date: Mon, 23 Oct 2000 09:43:19 +0200 [thread overview]
Message-ID: <200010230743.e9N7hJv12430@concorde.inria.fr> (raw)
> Nope, no forwards in Ocaml. At some point, you'll have to tie the recursive
> knot with an "and". If the problem you're having is that "far away" means
> "in different modules" then you bump into the lack of recursive modules,
> IMO the biggest PITA with ML style modules.
Hi,
I'm pleased to see I'm not working for nobody.
Actually I'm not working exactly on recursive modules, but rather on
mixin modules.
Instead of defining your two modules and then link them, you would
create a new one with the holes filled.
For instance, for Brain's example, you would write something like :
mixin A =
mix
deferred module CompositeSet : sig type t ... end
type composite = { data : string ; children : CompositeSet.t }
end;;
mixin B =
mix
deferred type composite
module CompositeSet =
struct
type t = C of composite | D
end
end
mixin C = A + B
In fact, this one is too difficult for me right now, because it
relies on a mutual dependency between a type and a module.
Since I'm just beginning this, I would really be pleased by any
comments, suggestions or questions about it.
Ciao.
Tom
next reply other threads:[~2000-10-23 11:39 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-23 7:43 Tom Hirschowitz [this message]
2000-10-23 15:35 ` Brian Rogoff
2000-10-25 14:03 ` John Max Skaller
2000-10-25 19:47 ` Brian Rogoff
2000-10-26 9:12 ` Hendrik Tews
2000-10-26 16:37 ` John Max Skaller
2000-10-24 8:37 ` Hendrik Tews
2000-10-25 14:31 ` John Max Skaller
2000-10-26 8:51 ` Hendrik Tews
-- strict thread matches above, loose matches on Subject: below --
2000-10-24 8:48 Tom Hirschowitz
2000-10-26 8:39 ` Hendrik Tews
2000-10-26 9:11 ` Tom Hirschowitz
2000-10-20 2:35 Chris Hecker
2000-10-20 12:24 ` Pierre Weis
2000-10-20 21:34 ` Chris Hecker
2000-10-21 8:02 ` Pierre Weis
2000-10-21 18:37 ` Chris Hecker
2000-10-21 12:22 ` Vitaly Lugovsky
2000-10-21 18:29 ` Chris Hecker
2000-10-21 22:36 ` Brian Rogoff
2000-10-23 18:43 ` Anton Moscal
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