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From: "David C. Hoos, Sr." <david.c.hoos.sr@ada95.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada Compiler Complaint ?
Date: Tue, 28 Aug 2001 05:06:20 -0500
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Date: 2001-08-28T05:06:20-05:00

Since file IO can only be done in whole bytes, what
was your intention in instantiating Integer_IO for
your Bit type?  E.g., ion which bit of each byte would
the data bit reside?

Incidentally, the type bit would probably be better defined
as mod 2 instead of range 0 .. 1.

----- Original Message -----
From: "Dale Pennington" <dalepenn@hiwaay.net>
Newsgroups: comp.lang.ada
To: <comp.lang.ada@ada.eu.org>
Sent: August 27, 2001 10:02 PM
Subject: Ada Compiler Complaint ?


> Folks, looks like my company news server is acting wierd, so I am also
> posting from a home account. If this shows up twice, just ignore the second
> one.
>
> I have a chunk of code giving me an error I do not understand. The code is :
>
> package X
> ...
> type Bit is range (0..1);
> for Bit'Size use 1;
>
> type Bit_Array is array(1..20000) of Bit;
> pragma Pack(Bit_Array);
>
> type Bit_Array_Ptr is access Bit_Array;
>
> package Bit_Io is new Ada.Text_Io.Integer_Io(Bit);
>
> ...
>
> procedure Y
> ...
> A_Bit_Array : Bit_Array_Ptr;
> begin
> ...
> Bit_Io.Put(Outfile,A_Bit_Array(I),1);
> ...
> end Y;
> ...
> end package X;
>
> The compiler complains for the Bit_Io.Put instruction on the column
> A_Bit_Array starts :
> expected type "System.Unsigned_Types.Packed_Byte"
> found type "Bit" defined at xxx.
>
> Where xxx is the line the type Bit is at.
>
> Anyone know why the compiler is complaining, and what I can do about it ?
>
> Thanks
>
> Dale Pennington
>
>
>
>
>
>
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