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From: BrianG <briang000@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: What is the best way to convert Integer to Short_Short_Integer?
Date: Sun, 13 Jun 2010 00:26:23 -0400
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Date: 2010-06-13T00:26:23-04:00
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Maciej Sobczak wrote:
> On 11 Cze, 09:07, "Jeffrey R. Carter" <spam.jrcarter....@spam.acm.org>
> wrote:
> 
>> Implementations are not required to define Short_Short_Integer (or any other
>> predefined integer type except Integer), so the program may fail on other
>> compilers. Thus, the use of Short_Short_Integer is not portable.
> 
> I have seen this argument raised many times already, but it was never
> substantiated in terms actual risk estimation.
What do you mean by a risk estimate, a probability for this particular 
type?  I would doubt anyone would have surveyed all Ada compilers just 
to generate that number.  More generically, I can only duplicate when 
Jeffrey said:  If you use a type provided by your Ada compiler that is 
not defined in the Ada RM, you cannot presume that that type is provided 
by a different compiler.  (I don't see how this would be different from 
the same situation in any language.  For example, how many C++ compilers 
don't implement a type named Short_Short_Integer?)
> Could you please list the compilers that do not implement this type?
All that do not claim to implement it.
> 
> Or is there somewhere a public list of such incompatibilities?
What incompatibilities, incompatible with what?  Might you mean 
Ada'95/05 RM 3.5.4(25) "An implementation may provide ..." (the only use 
of that name I could find in either document)?  How can any Ada compiler 
be incompatible with that?
> 
> --
> Maciej Sobczak * http://www.inspirel.com
> 
> YAMI4 - Messaging Solution for Distributed Systems
> http://www.inspirel.com/yami4

--In a world where I feel so small
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