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: a07f3367d7,e276c1ed16429c03
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news1.google.com!news3.google.com!feeder.news-service.com!94.75.214.39.MISMATCH!aioe.org!news.tornevall.net!.POSTED!not-for-mail
From: Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Ada is getting more popular!
Date: Sun, 31 Oct 2010 11:04:56 -0700
Organization: TornevallNET - http://news.tornevall.net
Message-ID: <iakbhv$8pc$2@tornado.tornevall.net>
References: <i93mac$73v$1@speranza.aioe.org>
 <8732ea65-1c69-4160-9792-698c5a2e8615@g13g2000yqj.googlegroups.com>
 <op.vk5bdvuuule2fv@garhos> <4cc60705$0$23764$14726298@news.sunsite.dk>
 <op.vk5njxfwule2fv@garhos> <4cc6753c$0$23756$14726298@news.sunsite.dk>
 <alpine.LNX.2.00.1010261417580.19777@Bluewhite64.example.net>
 <4cc71e08$0$23758$14726298@news.sunsite.dk>
 <alpine.LNX.2.00.1010271051280.20224@Bluewhite64.example.net>
 <4cc87d7a$0$23755$14726298@news.sunsite.dk> <op.vk85a5ivule2fv@garhos>
 <4cc912e1$0$23761$14726298@news.sunsite.dk>
 <iabepu$vn6$1@news.eternal-september.org>
 <alpine.LNX.2.00.1010281748280.4701@Bluewhite64.example.net>
 <iacenv$v7l$1@news.eternal-september.org>
 <op.vlcpo7wj0k3wt7@jellix.jlfencey.com> <op.vlcsb8nkule2fv@garhos>
 <iafaqh$npc$1@news.eternal-september.org> <op.vle2opy9ule2fv@garhos>
 <op.vlfb96cfule2fv@garhos> <iajgug$kpd$1@news.eternal-september.org>
 <10g3vmx6lxyu.bjfg1i5gjcsf$.dlg@40tude.net>
NNTP-Posting-Host: 8b397d2b8ff52d373a8f4f7e2b737d3a
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: ac5255ec7fed95a7134927f80f8f806d
X-Complaints-To: abuse@tornevall.net
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US;
 rv:1.9.1.15) Gecko/20101027 Thunderbird/3.0.10
X-Complaints-Language: Spoken language is english or swedish - NOT ITALIAN,
 FRENCH, GERMAN OR ANY OTHER LANGUAGE!
In-Reply-To: <10g3vmx6lxyu.bjfg1i5gjcsf$.dlg@40tude.net>
X-UserIDNumber: 1738
X-Validate-Post: 
 http://news.tornevall.net/validate.php?trace=ac5255ec7fed95a7134927f80f8f806d
X-Complaints-Italiano: Non abbiamo padronanza della lingua italiana - se
 mandate una email scrivete solo in Inglese, grazie
X-Posting-User: 0243687135df8c4b260dd4a9a93c79bd
Xref: g2news1.google.com comp.lang.ada:15056
Date: 2010-10-31T11:04:56-07:00
List-Id: <comp.lang.ada>

On 10/31/2010 03:54 AM, Dmitry A. Kazakov wrote:
>
> 5) you want to postpone some design decision/implementation to a later
> point. So you describe/implement what you know for certain right now, in
> the form of an abstract type, and let a derived type to define the rest
> when more information becomes available.

Deferring implementation decisions is the job of information hiding, implemented 
in Ada by packages, not the type system.

-- 
Jeff Carter
"Why, the Mayflower was full of Fireflies, and a few
horseflies, too. The Fireflies were on the upper deck,
and the horseflies were on the Fireflies."
Duck Soup
95