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From: mheaney@ni.net (Matthew Heaney)
Subject: Re: Beware: Rep spec on an enumeration type causes code explosion
Date: 1997/12/12
Message-ID: <mheaney-ya023680001212970109560001@news.ni.net>#1/1
X-Deja-AN: 297505162
References: <gwinn-0812971210080001@dh5055133.res.ray.com>
 <EKxx9n.Ly1.0.-s@inmet.camb.inmet.com> <348F3DFC.10DB@nospam.flash.net>
 <3490252D.6B550F17@ac3i.dseg.ti.com> <3490B7B1.711A@nospam.flash.net>
Organization: Estormza Software
Newsgroups: comp.lang.ada
Date: 1997-12-12T00:00:00+00:00
List-Id: <comp.lang.ada>


In article <3490B7B1.711A@nospam.flash.net>,
Ken.Garlington@nospam.computer.org wrote:



>>       Contiguous := Contiguous_Type (Holey);
>>       -- implicitly does equivalent of 'Pos

>This assumes Holey will always be one of A, B, C, D, E. What happens
>when the underlying
>I/O device returns a value of 6 for Holey?

Of course, you must always check for validity prior to the conversion,

if Holey'Valid then
   Contiguous := Contiguous_Type (Holey);
else
   <handle error>
end if;

--------------------------------------------------------------------
Matthew Heaney
Software Development Consultant
<mailto:matthew_heaney@acm.org>
(818) 985-1271