From: "Eric C. Cooper" <ecc@cmu.edu>
To: caml-list@inria.fr
Subject: Re: [Caml-list] References to polymorphic variants
Date: Wed, 25 Feb 2004 17:41:09 -0500 [thread overview]
Message-ID: <20040225224109.GC3578@localhost> (raw)
In-Reply-To: <courier.403CC7DC.00003512@softhome.net>
On Wed, Feb 25, 2004 at 09:05:48AM -0700, nickgrey@softhome.net wrote:
> I want to be able to store an arbitrary polymorphic variant in a reference:
>
> let (x : ([> ] option) ref ) = ref None ;;
>
> (Not my actual code, I've boiled it down to a minimal example.)
>
> This won't compile because it "contains a type variable which cannot be
> generalized".
It works in version 3.07+2:
Objective Caml version 3.07+2
# let (x : [> ] option ref) = ref None;;
val x : _[> ] option ref = {contents = None}
--
Eric C. Cooper e c c @ c m u . e d u
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next prev parent reply other threads:[~2004-02-25 22:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-25 16:05 nickgrey
2004-02-25 22:41 ` Eric C. Cooper [this message]
2004-02-25 23:07 ` Issac Trotts
2004-02-26 1:49 ` Eric C. Cooper
2004-02-26 1:53 ` Eric C. Cooper
2004-02-26 4:39 ` Jacques Garrigue
2004-02-25 22:56 ` [Caml-list] Re: Caml-list " Remi Vanicat
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