From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,a0d43ac4516d0597
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2003-02-02 22:04:18 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!postnews1.google.com!not-for-mail
From: volkert@nivoba.de (Volkert)
Newsgroups: comp.lang.ada
Subject: Re: Misleading Compiler Warning
Date: 2 Feb 2003 22:04:18 -0800
Organization: http://groups.google.com/
Message-ID: <d37844cb.0302022204.2f0ef672@posting.google.com>
References: <d37844cb.0302020658.44064e1e@posting.google.com>
 <3E3D6BDC.1010501@acm.org>
NNTP-Posting-Host: 138.189.120.38
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Trace: posting.google.com 1044252258 19857 127.0.0.1 (3 Feb 2003 06:04:18
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: 3 Feb 2003 06:04:18 GMT
Xref: archiver1.google.com comp.lang.ada:33706
Date: 2003-02-03T06:04:18+00:00
List-Id: <comp.lang.ada>

> >    
> >    package body Inner_Gen is
> >       type B is array(T) of Boolean;
> >       pragma Pack(B);
> >       type C is array (0 .. 100) of B;
> > 
> >       procedure Do_It is
> >         O : C;
> >       begin
> >         O(1)(0) := False;
> 
>                 ^ Here you assume that 0 is a value of the formal type T
> 
> >       end;
> >    
> >    end;
> > 
> > end Gen;
> 
> There is no guarantee that zero is a value of the actual type used for 
> the formal type T; a (sub)type with a 'First of one is very likely. 
> While the warning you got is not very good, some sort of warning seems 
> in order here.

This line was only for testing. Remove it and you will get the same gnat warning.


With regards
Volkert