From: Jerry <lanceboyle@qwest.net>
Subject: Re: Ada202X : alternate syntax for ranged scalars
Date: Thu, 2 May 2013 16:05:35 -0700 (PDT)
Date: 2013-05-02T16:05:35-07:00 [thread overview]
Message-ID: <649d00c5-8afc-4260-ac77-a11a066b3573@googlegroups.com> (raw)
In-Reply-To: <09e7fbc6-ea75-4660-8ece-25c5b096afd5@googlegroups.com>
On Friday, April 26, 2013 3:10:01 AM UTC-7, Martin wrote:
> The default scalar declarations are 'closed ranges', i.e. include both upper and lower in the valid range.
> Sometimes we would like to specify a 'half open range', e.g. values of degree from 0.0 up to BUT NOT INCLUDING 360.0.
> I'm floating (pun intended) an alternative syntax for specify such ranges (or 'intervals')...
> type Degree is digits 15 range [0.0, 360.0); -- includes 0 but not 360
>
> The current 'closed ranges' would be:
> type Degree is digits 15 range [0.0, 360.0]; -- includes 0 and 360
>
> Fully open range, i.e. not include 0.0 or 360.0:
> type Degree is digits 15 range (0.0, 360.0); -- includes neither 0 nor 360
>
> A 'reverse' half open range, i.e. not include 0.0 but including 360.0:
> type Degree is digits 15 range (0.0, 360.0]; -- excludes 0 but includes 360
>
> Usual rules would apply to the simple expression between the brackets.
>
> Any thoughts?
> -- Martin
If Ada introduces [ and ] please let them be for array indices.
Jerry
next prev parent reply other threads:[~2013-05-02 23:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-26 10:10 Ada202X : alternate syntax for ranged scalars Martin
2013-04-26 10:35 ` Peter C. Chapin
2013-04-26 12:26 ` Eryndlia Mavourneen
2013-05-02 2:11 ` Randy Brukardt
2013-05-02 13:29 ` Eryndlia Mavourneen
2013-04-26 12:53 ` AdaMagica
2013-04-26 14:46 ` Shark8
2013-04-28 2:11 ` Stephen Leake
2013-04-26 16:55 ` Jeffrey Carter
2013-05-02 23:05 ` Jerry [this message]
2013-05-14 22:30 ` Martin
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