From: Florian Hars <florian@hars.de>
To: JayR <jcriddle4@home.com>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] native code debugging
Date: Thu, 9 Aug 2001 09:08:05 +0200 [thread overview]
Message-ID: <20010809090805.B6270@hars> (raw)
In-Reply-To: <3B71E904.4016B6E7@home.com>; from jcriddle4@home.com on Wed, Aug 08, 2001 at 07:36:04PM -0600
On Wed, Aug 08, 2001 at 07:36:04PM -0600, JayR wrote:
> Is the following a side effect of defining these
> at the top level?
> # let id2 = id id;;
> val id2 : '_a -> '_a = <fun>
No, its a side-effect of side-effects.
It is due to the so-called value restriction, which for some
reason beyond my momentary comprehension is needed to be able to
type programs with side-effects. Section 5.1.1 of the introduction
by Hickey (linked to from the Ocaml homepage under "On-line Tutorials"
explains exactly your problem.
# let id2 x = (id id) x;;
val id2 : 'a -> 'a = <fun>
should work.
Yours, Florian.
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next prev parent reply other threads:[~2001-08-09 7:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-08 18:35 Chris Hecker
2001-08-09 1:36 ` JayR
2001-08-09 7:08 ` Florian Hars [this message]
2001-08-09 7:10 ` False polymorphic (was: Re: [Caml-list] native code debugging) David Mentre
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