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=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD,
	FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,61d8daec8bfa486e
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news3.google.com!proxad.net!feeder1-2.proxad.net!feeder.erje.net!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From: BrianG <briang000@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: An Example for Ada.Execution_Time
Date: Thu, 30 Dec 2010 18:51:30 -0500
Organization: A noiseless patient Spider
Message-ID: <ifj5u9$rr5$1@news.eternal-september.org>
References: <ifaloj$j2e$1@news.ett.com.ua>
 <ifbi5c$rqt$1@news.eternal-september.org> <ife8r9$9m6$1@munin.nbi.dk>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Thu, 30 Dec 2010 23:51:38 +0000 (UTC)
Injection-Info: mx03.eternal-september.org;
 posting-host="VMC9PqGY8ksIlUSlWhJs6Q";
	logging-data="28517"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX19Jql+1OmeLp8nqtAiUzJct"
User-Agent: Thunderbird 2.0.0.24 (X11/20100623)
In-Reply-To: <ife8r9$9m6$1@munin.nbi.dk>
Cancel-Lock: sha1:fkFTK57j3WZIgIbcavmOAFE9wms=
Xref: g2news2.google.com comp.lang.ada:17241
Date: 2010-12-30T18:51:30-05:00
List-Id: <comp.lang.ada>

Randy Brukardt wrote:
> "BrianG" <briang000@gmail.com> wrote in message 
> news:ifbi5c$rqt$1@news.eternal-september.org...
> ...
>>    >Neither Execution_Time or Execution_Time.Timers provides any value
>>    >that can be used directly.
> 
> This seems like a totally silly question. 
> 
> Giving this some sort of religious importance is beyond 
> silly...
> 
>                                    Randy.


Apparently, asking how a package, defined in the standard, was intended 
to be used is now a silly question, and asking for an answer to the 
question I originally asked (which was to clarify a previous response, 
not to provide an example of use) is a religious debate.  I need to 
revise my definitions.

I won't claim to be an expert on the RM, but I don't recall any other 
package (I did look at the ones you mention) that define a private type 
but don't provide operations that make that type useful (for some 
definition of 'use').  Ada.Directories doesn't require Ada.IO_Exceptions 
to use Directory_Entry_Type or Search_Type; Ada.Streams.Stream_IO 
doesn't require Ada.Streams (or Ada.Text_IO) to Create/Open/Read/etc. a 
File_Type.  The only thing provided from a CPU_Time is a count in 
seconds, or another private type.

Since D.16 defines CPU_Time as if it were a numeric value, is it too 
much to ask why a conversion to some form of numeric value wasn't 
provided?  Perhaps either a "-" or To_Duration  (and before anyone 
mentions duplicating the existing function, look at all of the 
Open/Close/Create/etc. for all the *_IO File_Types)?  I wasn't asking 
for anything to be changed, merely "why" - because I originally thought 
there might be some use that I hadn't foreseen.  Apparently not.

(Give the RM definition, making it a child of Real_Time might make it 
seem more logical, I guess, but since CPU_Time is not really a time, and 
is not related to "real time" that doesn't seem to make any sense.  I 
would think that would be all the more reason not to relate it to 
Ada.Real_Time.)

--BrianG

-- don't ask me
-- I'm just improvising
--   my illusion of careless flight
-- can't you see
--   my temperature's rising
-- I radiate more heat than light