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From: Natacha Kerensikova <lithiumcat@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: S-expression I/O in Ada
Date: Mon, 9 Aug 2010 11:32:33 -0700 (PDT)
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Date: 2010-08-09T11:32:33-07:00
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On Aug 9, 5:14=A0pm, Georg Bauhaus <rm.dash-bauh...@futureapps.de>
wrote:
> On 09.08.10 16:38, Dmitry A. Kazakov wrote:
>
> > Just one example from a huge list, why "in" is not an operation?
>
> > =A0 =A0if 0 /=3D (Mode and Alarm) then =A0-- Isn't it awful?
>
> > why am I not allowed to have:
>
> > =A0 =A0if Alarm in Mode then
>
> Is anything wrong with packed arrays of Booleans for status thingies?

In C for such things I usually use a struct bitfield. I guess the Ada
equivalent would be a record of Booleans, with a pragma or something
to have them packed together. Would there be anything wrong with that?
It seems to me more readable than the above IFs, though from what I
understood from the rest of the thread it would make CASE on multiple
bit difficult, and it won't allow slicing (which I'm not sure is a bad
thing, readability-wise). Is there anything else?


Natacha