From: "REH" <spamjunk@stny.rr.com>
Subject: Re: Ada decimal types
Date: 10 May 2006 05:22:00 -0700
Date: 2006-05-10T05:22:00-07:00 [thread overview]
Message-ID: <1147263720.249883.220580@j73g2000cwa.googlegroups.com> (raw)
In-Reply-To: <m264kecudx.fsf@grendel.local>
Simon Wright wrote:
> "REH" <me@you.com> writes:
>
> > "Randy Brukardt" <randy@rrsoftware.com> wrote in message
> > news:8KadnYXCB-5FKMLZnZ2dneKdnZydnZ2d@megapath.net...
>
> >> You're still very confused. Semantically, there is no difference between
> >>
> >> type Mission_Time_Type is delta 1.0e-6 range 0.0 .. (2.0**32) - 1.0;
> >> for Mission_Time_Type'Small use 1.0e-6;
> >>
> >> and
> >>
> >> type Mission_Time_Type is delta 1.0e-6 digits 14;
> >
> > Why is there not a difference? Won't the first actually use some negative
> > power-of-2 as the delta?
>
> The LRM 3.5.10(2) is a good deal less than informative as to what this
> _Small_ might be. But unless I have been totally wrong all this time
> it specifies the value of the LSB of the type.
>
> So for Randy's example, if you do an unchecked conversion of
> Mission_Type_Time'(1.5) to a long integer, the result would be
> 1_500_000.
>
> And if you did the same for a GNAT Duration'(1.5) -- remember, its
> 'Small is 1e-9) -- you would get 1_500_000_000.
OK, my assumption was that when they added decimal fixed points to the
language, you declared them via "digits x" otherwise you would get a
binary fixed point. Is that not true?
REH
next prev parent reply other threads:[~2006-05-10 12:22 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-04 15:23 Ada decimal types REH
2006-05-04 18:17 ` Jeffrey R. Carter
2006-05-04 22:20 ` REH
2006-05-05 9:14 ` Stephen Leake
2006-05-05 11:33 ` REH
2006-05-05 16:49 ` tmoran
2006-05-05 18:08 ` REH
2006-05-05 18:49 ` tmoran
2006-05-05 18:59 ` REH
2006-05-06 8:59 ` Keith Thompson
2006-05-06 14:01 ` REH
2006-05-06 15:48 ` Simon Wright
2006-05-06 16:39 ` REH
2006-05-08 21:19 ` Randy Brukardt
2006-05-09 23:21 ` REH
2006-05-10 1:08 ` Keith Thompson
2006-05-10 5:37 ` Simon Wright
2006-05-10 12:22 ` REH [this message]
2006-05-10 20:47 ` Randy Brukardt
2006-05-10 21:26 ` REH
2006-05-10 20:52 ` Randy Brukardt
2006-05-11 5:51 ` Simon Wright
2006-05-11 22:33 ` Randy Brukardt
2006-05-05 20:32 ` Randy Brukardt
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