Re: Null range in a single-member enumaration. How to?

Re: Null range in a single-member enumaration. How to?

[Pat Rogers]

"AG" <a_n_g@x_t_r_a.c_o.n_z> wrote in message
news:JO3G8.1472$EZ5.227090@news.xtra.co.nz...
<snip>
> type x is (a);  -- (a, b);
>
> type y is array (x'last..x'first) of boolean;  -- Works fine for (a, b); but
not (a);

Why not just

type y is array ( x ) of boolean;

???

---
Patrick Rogers                       Consulting and Training in:
http://www.classwide.com          Real-Time/OO Languages
progers@classwide.com               Hard Deadline Schedulability Analysis
(281)648-3165                                 Software Fault Tolerance

Re: Null range in a single-member enumaration. How to?

[David C. Hoos]

----- Original Message -----
From: "Pat Rogers" <progers@classwide.com>
Newsgroups: comp.lang.ada
To: <comp.lang.ada@ada.eu.org>
Sent: Monday, May 20, 2002 8:30 AM
Subject: Re: Null range in a single-member enumaration. How to?


> "AG" <a_n_g@x_t_r_a.c_o.n_z> wrote in message
> news:JO3G8.1472$EZ5.227090@news.xtra.co.nz...
> <snip>
> > type x is (a);  -- (a, b);
> >
> > type y is array (x'last..x'first) of boolean;  -- Works fine for (a, b);
but
> not (a);
>
> Why not just
>
> type y is array ( x ) of boolean;
The question was how to declare an _empty_ array, when the index
type has only one value.
>
> ???
>
> ---
> Patrick Rogers                       Consulting and Training in:
> http://www.classwide.com          Real-Time/OO Languages
> progers@classwide.com               Hard Deadline Schedulability Analysis
> (281)648-3165                                 Software Fault Tolerance
>
>
>
> _______________________________________________
> comp.lang.ada mailing list
> comp.lang.ada@ada.eu.org
> http://ada.eu.org/mailman/listinfo/comp.lang.ada
>

Re: Null range in a single-member enumaration. How to?

[Frank J. Lhota]

> Was there an elegant solution ever found?

No, there never was. OTOH, the issue only seems to come up in hypothetical
situations.

Re: Null range in a single-member enumaration. How to?

[Pat Rogers]

"David C. Hoos" <david.c.hoos.sr@ada95.com> wrote in message
news:mailman.1021902062.10180.comp.lang.ada@ada.eu.org...
> The question was how to declare an _empty_ array, when the index
> type has only one value.

Re: Null range in a single-member enumaration. How to?

[Pat Rogers]

"David C. Hoos" <david.c.hoos.sr@ada95.com> wrote in message
news:mailman.1021902062.10180.comp.lang.ada@ada.eu.org...
<snip>
> The question was how to declare an _empty_ array, when the index
> type has only one value.

Ah.  Thanks -- I missed the order of the attributes he used.