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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: Interresting,
 possibly buggy behavior in GNAT generics w/ expression function.
Date: Fri, 29 Mar 2013 07:45:04 +0000
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Date: 2013-03-29T07:45:04+00:00
List-Id: <comp.lang.ada>

In Generic_Attribute_Set, you have two Image functions:

    function Image(Value : Attribute_Values) return String

(Attribute_Values is a generic formal scalar) and

    function Image(Value : Positive) return String

and you instantiate the package with Attribute_Values => Integer.

What happens when you change the second Image's parameter to Integer is
that GNAT chooses the wrong Image to call!

I don't know whether this is a language problem or a GNAT problem. Or,
of course, a user problem!

(It's not a problem with statement functions; the same happens if the
function implementations are moved to the body).