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From: Joel VanLaven <jvl@ocsystems.com>
Subject: Re: QUIZ: To be or not to be (able to post)
Date: 1997/10/02
Message-ID: <610a7h$a7n@news3.his.com>#1/1
X-Deja-AN: 277313162
Sender: Joel VanLaven <jvl@fred.ocsystems.com>
References: <60n3dm$fhi$1@gonzo.sun3.iaf.nl>
Organization: OC Systems
Newsgroups: comp.lang.ada
Date: 1997-10-02T00:00:00+00:00
List-Id: <comp.lang.ada>


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;

: What does your favorite compiler say? And the others? ;-)

Our compiler (PowerAda) says:

     6:    function Sin (X : Float'Base) return Float'Base
           -----------------------------------------------
>>> SEMANTIC: Formal part of renaming-as-body is inconsistent with its
specification <8.5.4:5>


the LRM reference says (just the good part):
"The profile of a renaming-as-body shall ..., and shall conform fully to that
of the declaration it completes"

Fully conformant includes subtype conformant and the two profiles are not
subtype conformant.

-- Joel VanLaven