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Newsgroups: comp.lang.ada
Date: Mon, 4 Jan 2016 17:42:58 -0800 (PST)
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Subject: Re: Instantiating package problems
From: Anh Vo <anhvofrcaus@gmail.com>
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Xref: news.eternal-september.org comp.lang.ada:29015
Date: 2016-01-04T17:42:58-08:00
List-Id: <comp.lang.ada>

On Monday, January 4, 2016 at 2:39:04 PM UTC-8, Anh Vo wrote:
> On Monday, January 4, 2016 at 1:10:59 PM UTC-8, Dmitry A. Kazakov wrote:
> > On 2016-01-04 21:49, Anh Vo wrote:
> > > On Sunday, January 3, 2016 at 4:07:30 PM UTC-8, Andrew Shvets wrote:
> > >> Hi Bob,
> > >>
> > >> Thanks for writing back.  This is the entire example:
> > >> http://pastebin.com/GEJT3WzL
> > >
> > > Just recommend to add a precondition to function Division as shown below.
> >  > By the way, this feature is part of latest Ada (Ada 2012). In addition,
> >  > you should think about adding precondition to other operations such as
> >  > Addition where Input1 + Input2 <= Integer'Last and Input1 + Input2 >= 
> > Integer'Last.
> > >
> > >    function Division(
> > >      Input1 : in Integer;
> > >      Input2 : in Integer)
> > >        return Integer
> > >     with pre => Input2 /= 0;
> > 
> > The correct precondition of integer division is
> > 
> >     Input1/Input2 in Integer'Range
> > 
> > Note that it precludes zero divide, provided Ada 2012 can understand it, 
> > according to 3.5.4 (8) it must, but I am not a language lawer.
> 
> Neither, I am a language lawyer. However, did not see paragraph LRM 3.5.4 (8) precluded zero divide for Integer type.

Oops! There was an obvious typo. it supposed to read "However, I did not ... "