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From: "Randy Brukardt" <randy@rrsoftware.com>
To: <comp.lang.ada@ada-france.org>
Subject: RE: Bug in GNAT GPL 2006?
Date: Wed, 21 Feb 2007 14:19:52 -0600
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Date: 2007-02-21T21:20:03+01:00

Bill Findlay writes:

> Using GNAT GPL 2006 (20060522-34) I get warning messages
> like the following when using extended return statements:
>
>     function is_empty (the_table : a_safe_table) return Boolean is
>     begin
>        return result : Boolean do
>               |
>  >>> warning: variable "result" is assigned but never read
>
>           lock_table;
>              result := is_empty(a_basic_table(the_table));
>           unlock_table;
>        end return;
>     end is_empty;
>
> I'm inclined to assume that this is a compiler bug, but can
> anyone more knowledgeable about Ada 200[57] confirm this?

Sure looks like a (harmless) compiler bug to me. It's hard to imagine why
you would be required to read the result of a function before returning it.

                        Randy.