From: Warren <ve3wwg@gmail.com>
Subject: Re: S'Is_nan or S'Is_inf?
Date: Tue, 20 Jul 2010 14:12:01 +0000 (UTC)
Date: 2010-07-20T14:12:01+00:00 [thread overview]
Message-ID: <Xns9DBB67C3AA843WarrensBlatherings@81.169.183.62> (raw)
In-Reply-To: i22m9q$cd4$1@munin.nbi.dk
Randy Brukardt expounded in news:i22m9q$cd4$1@munin.nbi.dk:
> "Warren" <ve3wwg@gmail.com> wrote in message
> news:Xns9DB6AD1651560WarrensBlatherings@81.169.183.62...
>> Is there any is not-a-number or is-infinity test support in
>> Ada05+ (for floats)? Is there any being planned?
>
> We considered it for Ada 2005 (see AI95-0315-1). It was abandoned
> because of the large impact on implementations and the weak demand
> (hardly any user requests).
>
> John Barnes mentions this in the Ada 2005 Rational:
> http://www.adaic.com/standards/05rat/html/Rat-9-3-3.html
>
> It wasn't resurrected for Ada 2012, so there won't be any change here.
>
> BTW, GNAT seems to pass through a lot of IEEE stuff, thus you can
> write examples using that. Other Ada compilers (at least as of 2003-4
> timeframe) vary widely in what is exposed (Janus/Ada only supports
> IEEE denormal numbers; everything else raises Constraint_Error before
> it is stored).
>
> Randy.
Very interesting. My project is fairly dependant on gnat (at the
moment at least), so things should work ok. I'm not personally
a fan of these special IEEE values, but they crop up in 3rd party
libraries like the GSL etc. or in the reading of binary values from
a file.
Warren
next prev parent reply other threads:[~2010-07-20 14:12 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-15 21:00 S'Is_nan or S'Is_inf? Warren
2010-07-15 21:30 ` Rod Chapman
2010-07-15 22:03 ` Simon Wright
2010-07-15 21:42 ` J-P. Rosen
2010-07-15 22:07 ` Simon Wright
2010-07-16 8:42 ` Dmitry A. Kazakov
2010-07-16 17:06 ` Warren
2010-07-16 19:39 ` Dmitry A. Kazakov
2010-07-16 22:35 ` Warren
2010-07-17 6:24 ` Simon Wright
2010-07-19 17:04 ` Warren
2010-07-17 7:40 ` Dmitry A. Kazakov
2010-07-19 17:18 ` Warren
2010-07-19 23:15 ` Randy Brukardt
2010-07-20 14:12 ` Warren [this message]
2010-07-20 16:20 ` Dmitry A. Kazakov
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