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From: Marius Amado-Alves <marius@amado-alves.info>
Subject: Re: Actual stream of a certain type
Date: Thu, 27 Jul 2006 00:47:00 +0100
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Date: 2006-07-27T01:50:32+02:00

>    You can write your own 'Read and 'Write for T and within those  
> check
> if not Stream.all in T_Kind_of_Stream then raise ...

Thanks, I know, I tried that, but I don't seem to succeed combining  
that with providing T_Stream as a mix-in. I also tried Ada 2005  
interfaces with GNAT. I thought I saw a real case for interfaces and  
that interested me because all examples I have seen so far are  
academic, not compelling. But failed. Every time Ada got in the way.  
It's really a love-hate relation with her. Shall I post the code here?