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From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: Size of 0..255 is not 8 bits?
Date: 1998/05/14
Message-ID: <dewar.895191878@merv>#1/1
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Date: 1998-05-14T00:00:00+00:00
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Markus Kuhn <Markus.Kuhn@cl.cam.ac.uk> wrote:

>Other question: If the rest of a stream is too short for a
>T'Read to succeed, what is supposed to happen? Constraint error?


Quoting the GNAT sources ... (s-stratt.adb)

   Err : exception renames Ada.IO_Exceptions.End_Error;
   --  Exception raised if insufficient data read (note that the RM implies
   --  that Data_Error might be the appropriate choice, but AI195-00132
   --  decides with a binding interpretation that End_Error is preferred).

Note that it is a little odd that streams (which have nothing to do with
IO) should raise an exception in Ada.IO_Exceptions, but the AI is clear
as to the preference for this.