From: Keiko Nakata <keiko@kurims.kyoto-u.ac.jp>
To: christophe.papazian@gmail.com
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] covariance newb question
Date: Wed, 23 Nov 2005 21:16:29 +0900 (JST) [thread overview]
Message-ID: <20051123.211629.68536541.keiko@kurims.kyoto-u.ac.jp> (raw)
In-Reply-To: <5FABF242-1101-4499-8CF5-CF1559F6EECC@essi.fr>
From: Christophe Papazian <christophe.papazian@gmail.com>
> But type t seems to be covariant :
>
> # let f : 'a t = (fun x -> x);;
> val f : 'a t = <fun>
> # let g : int t = f;;
> val g : int t = <fun>
To my understanding,
this is an instantiation of the type variable 'a to int,
not subtyping.
Hope this helps.
Keiko NAKATA
next prev parent reply other threads:[~2005-11-23 12:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-22 11:37 Christophe Papazian
2005-11-23 12:16 ` Keiko Nakata [this message]
2005-11-27 23:31 ` [Caml-list] " Christophe Raffalli
2005-11-28 7:09 ` Olivier Andrieu
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