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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Inspiration for a better calendar package?
Newsgroups: comp.lang.ada
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Date: Tue, 9 Dec 2008 12:15:40 +0100
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Date: 2008-12-09T12:15:40+01:00
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On Tue, 9 Dec 2008 02:15:55 -0800 (PST), Martin wrote:

> Ada.Calendar, Ada.Calendar.Arithmetic and Ada.Calender.Time_Zones
> already seem to provide all this (and more!).

They do not. There is no portable way to handle UTC.

Ada.Calender.Time_Zones and Arithmetic are ill-defined. It was discussed in
comp.lang.ada in August this year. I also posted a proposal how to fix the
issue to Ada comment.

As for Ada.Calendar I doubt there should be any. It is a burden inherited
from Ada 83. We just do not need political time otherwise than for
formatted text output. It was silly for Ada 2005 to define time arithmetic
in terms of political time. Especially because there  simply is no way to
define such arithmetic. Since political time increment "+" is not a
function of its arguments!

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de