Re: Enumeration representation clause surprise.

[Adam Beneschan <adam@irvine.com>]

On Jun 12, 2:26 pm, Samuel Tardieu <s...@rfc1149.net> wrote:
> > Interesting. I had been playing with a similar example, and have
> > modified it a bit to present. What got me is the record type with
> > length 1 but an object with that type that was length zero!
>
> The only possible value for X_Type is X. This requires 0 bit of
> information to represent this fact.
>
> > (It compiles without any warnings).
>
> With the proposed patch, it gives:
>
> GNAT 4.4.0 20080611 (experimental)
> Copyright 1992-2008, Free Software Foundation, Inc.
>
> Compiling: test1.adb (source file time stamp: 2008-06-12 21:22:24)
>
>     26.         X1 at 0 range 0 .. -1;                   -- Minus 1 !!
>                    |
>         >>> warning: component representation will be biased

So what would the value of the bias be?

                            -- Adam