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 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,c0d4e990924eb044
X-Google-Attributes: gid103376,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII
Path: 
 g2news1.google.com!postnews.google.com!e38g2000yqa.googlegroups.com!not-for-mail
From: Ludovic Brenta <ludovic@ludovic-brenta.org>
Newsgroups: comp.lang.ada
Subject: Re: Newbie question -- dereferencing access
Date: Thu, 12 Mar 2009 03:16:51 -0700 (PDT)
Organization: http://groups.google.com
Message-ID: 
 <15ae052a-ce4e-4c19-922e-0704bf0b4a3f@e38g2000yqa.googlegroups.com>
References: <RL-dnRPsn-IcgyXUnZ2dnUVZ8oKWnZ2d@posted.plusnet>
	<f05febe5-7bd4-41ee-b366-10db56397230@p20g2000yqi.googlegroups.com>
	<OZGdneh8guLrQSXUnZ2dnUVZ8gKWnZ2d@posted.plusnet>
NNTP-Posting-Host: 153.98.68.197
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1236853011 29277 127.0.0.1 (12 Mar 2009 10:16:51
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Thu, 12 Mar 2009 10:16:51 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: e38g2000yqa.googlegroups.com; posting-host=153.98.68.197;
	posting-account=pcLQNgkAAAD9TrXkhkIgiY6-MDtJjIlC
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.7)
	Gecko/2009021910 Firefox/3.0.7,gzip(gfe),gzip(gfe)
Xref: g2news1.google.com comp.lang.ada:4061
Date: 2009-03-12T03:16:51-07:00
List-Id: <comp.lang.ada>

On Mar 12, 10:57=A0am, Tim Rowe <spamt...@tgrowe.plus.net> wrote:
> Ludovic Brenta wrote:
> > On Mar 11, 9:26 pm, Tim Rowe <spamt...@tgrowe.plus.net> wrote:
> >> If I have an access variable, for example:
> >> =A0 =A0 =A0s: access string :=3D new String'("Foo");
> >> is there an easy way to assign from s to a string variable? Obviously =
I
> >> can't assign it directly, because access string is not string, so how =
do
> >> I convert? Everything I read says that dereferences happen
> >> automatically, but in this situation!
>
> > =A0 =A0Copy_Of_S : String :=3D s.all;
>
> > This also works when passing parameters, e.g.
>
> > =A0 =A0procedure P (Str : in String) is null;
> > begin
> > =A0 =A0P (s.all);
>
> Perfect! Thanks.
>
> Can you (or anyone else) suggest a good book or online tutorial for an
> existing programmer, wanting to add Ada to his language portfolio? I
> have John Barnes "Programming in Ada 95", but I don't find his
> explanations very clear (and I couldn't find the answer to the question
> above), so if there's something better out there it might be worth me
> getting it.

The Ada Programing wikibook has received a lot of praise and has a
complete chapter discussing access types:

http://en.wikibooks.org/wiki/Ada_Programming/Types/access

See also the books and tutorials listed at http://www.adaic.com/learn/index=
.html

--
Ludovic Brenta.