From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM
	autolearn=ham autolearn_force=no version=3.4.4
X-Google-Thread: 103376,7b65fc33a05f24b6
X-Google-Attributes: gid103376,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news1.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!nx02.iad.newshosting.com!newshosting.com!69.16.185.21.MISMATCH!npeer03.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post02.iad.highwinds-media.com!newsfe03.iad.POSTED!4a71828c!not-for-mail
From: Hyman Rosen <hyrosen@mail.com>
User-Agent: Thunderbird 2.0.0.18 (Windows/20081105)
MIME-Version: 1.0
Newsgroups: comp.lang.ada
Subject: Re: A curiosity...
References: 
 <a88dafcc-04d0-4a46-a168-7cb034894181@k41g2000yqn.googlegroups.com>
 	<d49568ae-d205-457f-bf10-61e08b23b858@t26g2000prh.googlegroups.com>
 	<ffYZk.17574$st1.15396@newsfe10.iad>
 <0f009ce8-0f50-4b85-9368-0d0c68f42da1@w34g2000yqm.googlegroups.com>
In-Reply-To: 
 <0f009ce8-0f50-4b85-9368-0d0c68f42da1@w34g2000yqm.googlegroups.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Message-ID: <BHYZk.14364$M33.9774@newsfe03.iad>
X-Complaints-To: abuse@WWWSpace.NET
NNTP-Posting-Date: Thu, 04 Dec 2008 22:19:13 UTC
Date: Thu, 04 Dec 2008 17:19:10 -0500
Xref: g2news2.google.com comp.lang.ada:3849
Date: 2008-12-04T17:19:10-05:00
List-Id: <comp.lang.ada>

Ludovic Brenta wrote:
> Yes. In fact, C requires that pointers and integers be interchangable
> so as to make address arithmetic "transparent" and extremely
> dangerous. That's why, instead of writing "&th[t]" as Adam did, they
> wrote "th+t" and thought themselves clever.

That's completely false. The expression 'th + t' exhibits two features of C,
neither of which involves pointers and integers being interchangeable. The
first is that in an expression, a value of type 'array of T' converts to the
type 'pointer to T' with value 'address of first element of that array'. The
second is that adding integers to pointers is equivalent to indexing; given
a pointer to an element of an array, adding or subtracting a number from it
results in a pointer pointing to another element of the array.