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Date: Mon, 11 May 2015 21:49:50 -0700 (PDT)
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Subject: Re: {Pre,Post}conditions and side effects
From: vincent.diemunsch@gmail.com
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Xref: news.eternal-september.org comp.lang.ada:25830
Date: 2015-05-11T21:49:50-07:00
List-Id: <comp.lang.ada>

Le mardi 12 mai 2015 00:49:40 UTC+2, Peter Chapin a =E9crit=A0:

> In the book on SPARK 2014 John McCormick and I recently wrote (available=
=20
> later this summer) we show an example of proving a sorting procedure wher=
e=20
> the tools prove both
>=20
> a) The resulting array is sorted and
> b) The resulting array is a permutation of the original array.
>=20
> We use ghost functions to do this.=20

Tell us more ! Do you use the same basic idea :=A0assuming that the swap fu=
nction is
an elementary permutation of arrays ? Do you use an assume statement ?

> The proofs can be processed with the=20
> upcoming SPARK GPL 2015 release, but I'm not sure if they will go through=
=20
> with SPARK GPL 2014.

What is new with the SPARK GPL=A02015 prover ?

Regards,

Vincent