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: 103376,23a8a20ef7e9405e
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news1.google.com!news1.google.com!npeer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!nntp.club.cc.cmu.edu!feeder.erje.net!eternal-september.org!.POSTED!not-for-mail
From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: S'Is_nan or S'Is_inf?
Date: Thu, 15 Jul 2010 23:07:51 +0100
Organization: A noiseless patient Spider
Message-ID: <m2y6dctn48.fsf@pushface.org>
References: <Xns9DB6AD1651560WarrensBlatherings@81.169.183.62>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Injection-Date: Thu, 15 Jul 2010 22:07:51 +0000 (UTC)
Injection-Info: mx02.eternal-september.org;
 posting-host="KCXegvZb5vh43D+f3BR6Ew";
	logging-data="28974"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX1+D8Y96YOXaAZUkCzy0QGlkVzV4XRA77uA="
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (darwin)
Cancel-Lock: sha1:RwiHvKJa63C4oGP1P+Bhk/muEb8=
	sha1:sBxfCpVuoRaCplBAza97nc7fxZU=
Xref: g2news1.google.com comp.lang.ada:12442
Date: 2010-07-15T23:07:51+01:00
List-Id: <comp.lang.ada>

Warren <ve3wwg@gmail.com> writes:

> Is there any is not-a-number or is-infinity test support in Ada05+
> (for floats)?  Is there any being planned?

With GNAT, using a subtype

   subtype Checked_Float is Float range Float'Range;

will give you a Constraint_Error for NaN or +/-Inf.