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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada package registry?
Date: Mon, 8 Feb 2016 16:58:57 -0600
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Date: 2016-02-08T16:58:57-06:00
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<gautier_niouzes@hotmail.com> wrote in message 
news:dbd56a53-7a9c-4707-8d6d-0156174f7263@googlegroups.com...
> Regarding the U2200 machine I think it's OK. The type in question is:
>
>  min_bits: constant:= Integer'Max(32, System.Word_Size);
>  -- 13.3(8): A word is the largest amount of storage that can be
>  -- conveniently and efficiently manipulated by the hardware,
>  -- given the implementation's run-time model.
>
>  type Integer_M32 is range -2**(min_bits-1) .. 2**(min_bits-1) - 1;
>  --  We define an Integer type which is at least 32 bits, but n bits
>  --  on a native n > 32 bits architecture (no performance hit on 64+
>  --  bits architectures).
>
> You say: "The lower bound would have to be -2**(min_bits-1)-1 on such a 
> machine.". Since -2**(min_bits-1) > -2**(min_bits-1)-1, Integer_M32 is a 
> subrange of what you mean and it should be OK.
>
> I let you the pleasure of trying the actual compilation for the U2200. I 
> wait with excitement for the results ;-).

Since we didn't implement stream attributes until after that project petered 
out, it sadly wouldn't prove anything. But I know I say String'Read in there 
somewhere, and the 9-bit Size for Character on the U2200 would have 
interesting effects.

It really doesn't make sense to run those programs on the U2200 anyway; no 
browsers or that sort of thing there. They had a POSIX emulator, but that 
was about as modern as it got.

                                      Randy.