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-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,103b407e8b68350b
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2003-01-25 22:32:40 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!c03.atl99!chi1.webusenet.com!news.webusenet.com!cyclone1.gnilink.net!spamfinder.gnilink.net!nwrddc01.gnilink.net.POSTED!53ab2750!not-for-mail
From: Hyman Rosen <hyrosen@mail.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US;
 rv:1.3a) Gecko/20021210
X-Accept-Language: en-us, en
MIME-Version: 1.0
Newsgroups: comp.lang.ada
Subject: Re: Anybody in US using ADA ? One silly idea..
References: <b06t3p$m4h27$1@ID-77047.news.dfncis.de>
 <1042743579.1165@master.nyc.kbcfp.com>
 <b09b01$n7ro0$5@ID-77047.news.dfncis.de>
 <1042824191.538184@master.nyc.kbcfp.com>
 <b0bhef$ni0jk$1@ID-77047.news.dfncis.de>
 <_VkW9.266404$FT6.43771824@news4.srv.hcvlny.cv.net>
 <b0e5vu$ognn6$1@ID-77047.news.dfncis.de>
 <x_1X9.306255$FT6.52690936@news4.srv.hcvlny.cv.net>
 <ga3q2vkds5akg0iaommdaniqp3ubo293pl@4ax.com>
 <ba162549.0301211055.17e3c1d8@posting.google.com>
 <gqiv2vgsto8tm9mbi0flii4vr594ui06fo@4ax.com>
 <1043339266.922562@master.nyc.kbcfp.com>
 <b0ttr4$s9ilj$1@ID-77047.news.dfncis.de>
In-Reply-To: <b0ttr4$s9ilj$1@ID-77047.news.dfncis.de>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Message-ID: <7iLY9.2401$qb1.464@nwrddc01.gnilink.net>
Date: Sun, 26 Jan 2003 06:32:35 GMT
NNTP-Posting-Host: 162.83.246.152
X-Complaints-To: abuse@verizon.net
X-Trace: nwrddc01.gnilink.net 1043562755 162.83.246.152 (Sun,
 26 Jan 2003 01:32:35 EST)
NNTP-Posting-Date: Sun, 26 Jan 2003 01:32:35 EST
Xref: archiver1.google.com comp.lang.ada:33434
Date: 2003-01-26T06:32:35+00:00
List-Id: <comp.lang.ada>

Dmitry A. Kazakov wrote:
> To verify the code using templates, you have to look into the
 > bodies of the template functions.

You just have to read the documentation, just like any other
function with preconditions.

> If you do not plan to put a type into a hash table, why should it be 
> "Hashable"?

Because in the absence of multiple inheritance, there is a tendency
to "pile on" stuff that might be useful, because it's hard to add later?

> Unfortunately in most cases Circle will never be converted to Ellipse and 
> back, even though the compiler has everything for that.

Why? It looks like you wrote the code correctly to do just that.