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From: Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Efficiency of code generated by Ada compilers
Date: Mon, 09 Aug 2010 11:42:29 -0700
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Date: 2010-08-09T11:42:29-07:00
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On 08/09/2010 06:28 AM, Robert A Duff wrote:
>
> Signed integers work fine for that.  Except when you need
> that one extra bit -- that's the problem.

We've been able to do

type T is range 0 .. 2 ** N - 1;
for T'Size use N;

since Ada 83. So the only problem is when you want the equivalent of

type T is mod System.Max_Binary_Modulus;

since System.Max_Binary_Modulus - 1 > System.Max_Integer.

-- 
Jeff Carter
"Run away! Run away!"
Monty Python and the Holy Grail
58

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