From: Radzevich Belevich <radzevich.belevich@gmail.com>
To: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] class type param constraint
Date: Thu, 09 Apr 2009 14:21:21 +0400 [thread overview]
Message-ID: <1239272481.2787.11.camel@serphost.localdomain> (raw)
In-Reply-To: <20090409.191306.169484516.garrigue@math.nagoya-u.ac.jp>
On Thu, 2009-04-09 at 19:13 +0900, Jacques Garrigue wrote:
> This may be a bit confusing, but the .. in your constraint on 'c means
> that no actual subtyping will occur when you use this type as target.
> Indeed, if the constraint was left unchanged, it would mean that by
> choosing an arbitrary instance, you could use the as_c method to
> convert an object of type "t a" to any "t".
Why it can't be converted to any valid "t"?
prev parent reply other threads:[~2009-04-09 10:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-09 8:42 Radzevich Belevich
2009-04-09 10:10 ` [Caml-list] " Radzevich Belevich
2009-04-09 10:13 ` Jacques Garrigue
2009-04-09 10:21 ` Radzevich Belevich [this message]
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