From: William Lovas <wlovas@stwing.upenn.edu>
To: caml-list@inria.fr
Subject: Re: Ant: [Caml-list] Efficiency of let/and
Date: Mon, 26 Sep 2005 01:56:29 -0400 [thread overview]
Message-ID: <20050926055627.GA7592@coruscant.stwing.upenn.edu> (raw)
In-Reply-To: <20050926043240.24009.qmail@web26809.mail.ukl.yahoo.com>
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
next prev parent reply other threads:[~2005-09-26 5:56 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 [this message]
2005-09-26 7:17 ` Bill Wood
2005-09-26 20:59 ` Ant: " Martin Chabr
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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