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From: mheaney@ni.net (Matthew Heaney)
Subject: Re: QUIZ: To be or not to be (able to post)
Date: 1997/09/30
Message-ID: <mheaney-ya023680003009970443150001@news.ni.net>#1/1
X-Deja-AN: 276696789
References: <60n3dm$fhi$1@gonzo.sun3.iaf.nl>
Organization: Estormza Software
Newsgroups: comp.lang.ada
Date: 1997-09-30T00:00:00+00:00
List-Id: <comp.lang.ada>


In article <60n3dm$fhi$1@gonzo.sun3.iaf.nl>, Geert Bosch
<geert@gonzo.sun3.iaf.nl> wrote:

>OK, here is a nice question for all you Ada experts out there.
>Why isn't the code below not legal? Or is it? If so, why?
>
>   with Ada.Numerics.Elementary_Functions;
>   procedure Renaming is
>
>      function Sin (F : Float) return Float;
>
>      function Sin (X : Float'Base) return Float'Base
>         renames Ada.Numerics.Elementary_Functions.Sin;
>
>   begin
>      null;
>   end Renaming;

Isn't this a "co-resident homograph"?  Float is a subtype of Float'Base,
and subtypes can't be used to resolve ambiguity.  Only types are part of a
signiture, not subtypes.

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Matthew Heaney
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