From: Guillaume Yziquel <guillaume.yziquel@citycable.ch>
To: Lauri Alanko <la@iki.fi>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] What is an applicative functor?
Date: Fri, 8 Apr 2011 23:34:12 +0200 [thread overview]
Message-ID: <20110408213412.GB4608@localhost> (raw)
In-Reply-To: <20110408212339.GD5064@melkinpaasi.cs.helsinki.fi>
Le Saturday 09 Apr 2011 à 00:23:39 (+0300), Lauri Alanko a écrit :
> On Fri, Apr 08, 2011 at 08:50:52AM +0200, Andreas Rossberg wrote:
> > Aside: In general, you really want to have both: functors with
> > impure bodies better be generative, while functors with pure bodies
> > should be applicative. The absence of generative functors in OCaml
> > also is the reason that you cannot unpack a first-class module in a
> > functor body (non-locally), because that is unsound with applicative
> > semantics.
>
> I'm not sure if there really is an "absence": functions over
> first-class modules _are_ generative functors for all practical
> purposes. The only problem is that they only support type constraints
> for first-order types (and even this can be circumvented with a bit of
> magic).
I've very curious about the "with a bit of magic" part...
> Lauri
--
Guillaume Yziquel
next prev parent reply other threads:[~2011-04-08 21:37 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-07 21:12 Dawid Toton
2011-04-07 21:49 ` Gerd Stolpmann
2011-04-08 0:44 ` [Caml-list] " Dawid Toton
2011-04-08 1:34 ` Gerd Stolpmann
2011-04-08 6:50 ` [Caml-list] " Andreas Rossberg
2011-04-08 8:04 ` Alain Frisch
2011-04-08 8:20 ` Jacques Garrigue
2011-04-08 8:38 ` Jacques Garrigue
2011-04-08 8:44 ` Alain Frisch
2011-04-08 10:09 ` Jacques Garrigue
2011-04-08 11:25 ` Julien Signoles
2011-04-08 11:58 ` Alain Frisch
2011-04-11 7:10 ` Julien Signoles
2011-04-11 7:21 ` Julien Signoles
2011-04-08 13:43 ` rossberg
2011-04-08 16:26 ` Julien Signoles
2011-04-13 2:36 ` Lucas Dixon
2011-04-13 7:23 ` Andreas Rossberg
2011-04-15 3:08 ` Lucas Dixon
2011-04-19 14:04 ` Andreas Rossberg
2011-04-08 16:43 ` Till Varoquaux
2011-04-08 17:35 ` Alain Frisch
2011-04-08 18:44 ` Andreas Rossberg
2011-04-08 21:23 ` Lauri Alanko
2011-04-08 21:34 ` Guillaume Yziquel [this message]
2011-04-09 11:41 ` Andreas Rossberg
2011-04-08 5:35 ` Stefan Holdermans
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