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From: reason67@my-deja.com
Subject: Re: Type casting question
Date: 1999/12/21
Message-ID: <83of3h$352$1@nnrp1.deja.com>#1/1
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References: <385E87D8.2B44B800@tridsys.com> <83o9d0$ul9$1@nnrp1.deja.com>
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Date: 1999-12-21T00:00:00+00:00
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In article <83o9d0$ul9$1@nnrp1.deja.com>,
  Robert Dewar <robert_dewar@my-deja.com> wrote:
> In article <385E87D8.2B44B800@tridsys.com>,

> > type Bit_5 is range 2#0# .. 2#11111#;
> >     for Bit_5'Size use 5;
> > subtype Size_Type is Bit_5;
>
> By the way, it is almost certainly wrong to have the base
> type of Bit_5 be signed.
>
> Almost certainly what you want here is
>
>   type Bit_5 is mod 2 ** 5;

Assuming he is using Ada95 and not Ada 83.

> The size clause is unnecessary in either case, since the
> default size in both cases is obviously 5!

I have used compilers that, unless you specified, put all integer types
to a size of 32 by default. I do not know if the Ada95 LRM specifies
that the type must be sized to the minimum or not.
---
Jeffrey S. Blatt


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