From: Martin Chabr <martin_chabr@yahoo.de>
To: William Lovas <wlovas@stwing.upenn.edu>
Cc: caml-list@inria.fr
Subject: Ant: Re: Ant: [Caml-list] Efficiency of let/and
Date: Mon, 26 Sep 2005 22:59:53 +0200 (CEST) [thread overview]
Message-ID: <20050926205953.76676.qmail@web26801.mail.ukl.yahoo.com> (raw)
In-Reply-To: <20050926055627.GA7592@coruscant.stwing.upenn.edu>
Yes, you are right. Shame on me. I must have had a
bounding for y from an earlier experiment. When I
restart the interpreter, so that it is in a virgin
state, I get the same error message about unbound y as
you.
Martin
--- William Lovas <wlovas@stwing.upenn.edu> schrieb:
> On Mon, Sep 26, 2005 at 06:32:40AM +0200, Martin
> Chabr wrote:
> > As it appears to me, there is no semantic
> difference
> > between both alternatives. It can be shown with
> two
> > dependent expressions y = 1 and z = y + 2:
>
> This is not universally true:
>
> > # let y = 1
> > and z = y + 2 in
> > z;;
> > - : int = 3
>
> Objective Caml version 3.08.1
>
> # let y = 1
> and z = y + 2 in
> z;;
> Unbound value y
>
> So either you are using a version older than 3.08.1
> or this is a fairly
> recent change. In the latter case, people who wish
> to remain backward-
> compatible might eschew this style for sequential
> bindings, regardless
> of any potential performance problems.
>
> William
>
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Martin Chabr
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next prev parent reply other threads:[~2005-09-26 20:59 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-25 13:31 Brian Hurt
2005-09-25 14:47 ` [Caml-list] " Jon Harrop
2005-09-26 4:32 ` Ant: " Martin Chabr
2005-09-26 5:24 ` Fernando Alegre
2005-09-26 5:56 ` William Lovas
2005-09-26 7:17 ` Bill Wood
2005-09-26 20:59 ` Martin Chabr [this message]
2005-09-26 13:22 ` Brian Hurt
2005-09-26 16:05 ` Ant: " Stefan Monnier
2005-09-26 16:30 ` [Caml-list] " Brian Hurt
2005-09-27 5:52 ` skaller
2005-09-27 13:06 ` Brian Hurt
2005-09-27 13:24 ` Alan Falloon
2005-09-27 15:24 ` Stefan Monnier
2005-09-27 16:11 ` Brian Hurt
2005-09-27 5:32 ` skaller
2005-09-27 15:21 ` Stefan Monnier
2005-09-26 17:04 ` Ant: [Caml-list] " Mackenzie Straight
2005-09-26 17:05 ` Marius Nita
2005-09-26 17:36 ` David McClain
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