From: bobduff@world.std.com (Robert A Duff)
Subject: Re: Interfacing contracts (Was: Eiffel and Java + Ada dispatching)
Date: 1996/11/17
Date: 1996-11-17T00:00:00+00:00 [thread overview]
Message-ID: <E11E8r.7LK@world.std.com> (raw)
In-Reply-To: 56kgrf$61t@fozzie.sun3.iaf.nl
In article <56kgrf$61t@fozzie.sun3.iaf.nl>,
Geert Bosch <geert@fozzie.sun3.iaf.nl> wrote:
>Example for interface specification that might be accepted by
>an Ada implementation without violating the Ada-95 standard (yes?):
>
> -- Integer square root function truncating the exact result
> function Square_Root (I : Natural) return Natural;
>
> for Square_Root'Post_Condition use
> Square_Root (I) ** 2 <= I and (Square_Root (I) + 1) ** 2 > I;
Well, 13.1(19) says that expression is evaluated at this point, which is
not what you want.
You could use specially-formatted comments, as SPARK does.
By the way, I think invariants (not loop invariants, but per-class
invariants) are the most interesting thing about Eiffel's assertion
facility.
- Bob
next prev parent reply other threads:[~1996-11-17 0:00 UTC|newest]
Thread overview: 162+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-10-27 0:00 Eiffel and Java Vincent WEBER
1996-10-27 0:00 ` Jean-Michel P. Decombe
1996-10-28 0:00 ` Alexandre Oliva
1996-10-28 0:00 ` David Hanley
1996-10-28 0:00 ` Matt Kennel
1996-10-28 0:00 ` Robert Dewar
1996-10-31 0:00 ` Doug Marker
1996-10-29 0:00 ` Chris Trimble
1996-10-31 0:00 ` Doug Marker
1996-10-31 0:00 ` David Bennett
1996-10-28 0:00 ` Matthew Heaney
1996-10-29 0:00 ` Vincent WEBER
1996-10-31 0:00 ` James McKim
1996-11-01 0:00 ` Matthew Heaney
1996-11-04 0:00 ` James McKim
1996-10-30 0:00 ` Jon S Anthony
1996-11-01 0:00 ` Eiffel and Java + Ada dispatching Jean-Marc Jezequel
1996-10-30 0:00 ` Eiffel and Java Don Harrison
1996-10-31 0:00 ` James McKim
1996-11-04 0:00 ` Don Harrison
1996-11-23 0:00 ` Van Snyder
1996-10-31 0:00 ` Joachim Durchholz
1996-11-01 0:00 ` Norman H. Cohen
1996-11-02 0:00 ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-02 0:00 ` Eiffel and Java Jon S Anthony
1996-11-03 0:00 ` Joachim Durchholz
1996-11-05 0:00 ` Norman H. Cohen
1996-10-28 0:00 ` Larry Kilgallen
1996-10-30 0:00 ` Ronald Cole
1996-10-29 0:00 ` Don Harrison
1996-10-29 0:00 ` Eiffel and Java + Ada dispatching Vincent WEBER
1996-10-30 0:00 ` Don Harrison
1996-10-30 0:00 ` Jon S Anthony
1996-10-30 0:00 ` Jean-Marc Jezequel
1996-11-01 0:00 ` Don Harrison
1996-11-01 0:00 ` Joachim Durchholz
1996-10-29 0:00 ` Eiffel and Java Fergus Henderson
1996-10-30 0:00 ` Don Harrison
1996-10-30 0:00 ` Fergus Henderson
1996-10-31 0:00 ` David L. Shang
1996-11-01 0:00 ` Matt Kennel
1996-11-04 0:00 ` David L. Shang
1996-11-05 0:00 ` Matt Kennel
1996-11-06 0:00 ` David L. Shang
1996-11-04 0:00 ` Robert I. Eachus
1996-11-01 0:00 ` Jon S Anthony
1996-11-02 0:00 ` Fergus Henderson
1996-11-04 0:00 ` David L. Shang
1996-11-05 0:00 ` Jon S Anthony
1996-11-02 0:00 ` Darko BUDOR
1996-11-02 0:00 ` Fergus Henderson
1996-11-03 0:00 ` Matt Kennel
1996-11-03 0:00 ` Darko BUDOR
1996-11-03 0:00 ` Jon S Anthony
1996-11-03 0:00 ` Matthias Ernst
1996-11-05 0:00 ` Jon S Anthony
1996-11-10 0:00 ` Marcos F. F. de Macedo
1996-11-11 0:00 ` David L. Shang
1996-11-12 0:00 ` Fergus Henderson
1996-11-12 0:00 ` David L. Shang
1996-11-12 0:00 ` David L. Shang
1996-11-16 0:00 ` Fergus Henderson
1996-11-18 0:00 ` David L. Shang
1996-11-18 0:00 ` Kai Quale
1996-11-18 0:00 ` David L. Shang
1996-11-25 0:00 ` Kai Quale
1996-11-15 0:00 ` Paul Johnson
1996-11-12 0:00 ` Alexander Asteroth
1996-11-11 0:00 ` Marcos F. F. de Macedo
1996-11-12 0:00 ` Benedict A. Gomes
1996-11-12 0:00 ` Matt Kennel
1996-10-30 0:00 ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-04 0:00 ` Don Harrison
1996-11-04 0:00 ` C to Ada Ali Mirhosseini
1996-11-04 0:00 ` Matthew Daniel
1996-11-04 0:00 ` Robert Dewar
1996-11-05 0:00 ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-05 0:00 ` Don Harrison
1996-11-06 0:00 ` Jon S Anthony
1996-10-30 0:00 ` Eiffel and Java David Petrie Stoutamire
1996-10-30 0:00 ` Eiffel and Java + Ada dispatching Robert I. Eachus
1996-10-31 0:00 ` Joachim Durchholz
1996-10-31 0:00 ` Jon S Anthony
1996-11-01 0:00 ` Jean-Marc Jezequel
[not found] ` <E06F2B.Az7@syd.csa.com.au>
1996-11-01 0:00 ` Jon S Anthony
1996-11-04 0:00 ` Don Harrison
1996-11-05 0:00 ` Jon S Anthony
1996-11-02 0:00 ` Robert Dewar
1996-11-04 0:00 ` Norman H. Cohen
1996-11-05 0:00 ` Don Harrison
1996-11-05 0:00 ` Robb Nebbe
1996-11-06 0:00 ` To overload or not to overload (was Eiffel and Java + Ada dispatching) Don Harrison
1996-11-06 0:00 ` Robb Nebbe
1996-11-07 0:00 ` Norman H. Cohen
1996-11-07 0:00 ` Don Harrison
1996-11-07 0:00 ` Juergen Schlegelmilch
1996-11-08 0:00 ` Don Harrison
1996-11-08 0:00 ` Don Harrison
1996-11-14 0:00 ` Jon S Anthony
1996-11-14 0:00 ` Jon S Anthony
1996-11-07 0:00 ` Jon S Anthony
1996-11-07 0:00 ` Jon S Anthony
1996-11-11 0:00 ` Don Harrison
1996-11-08 0:00 ` bill.williams
1996-11-11 0:00 ` Don Harrison
1996-11-06 0:00 ` Eiffel and Java + Ada dispatching Jean-Marc Jezequel
1996-11-07 0:00 ` Robb Nebbe
1996-11-08 0:00 ` Robert I. Eachus
1996-11-05 0:00 ` Joachim Durchholz
1996-11-06 0:00 ` Robert I. Eachus
1996-11-08 0:00 ` Don Harrison
1996-11-08 0:00 ` Jon S Anthony
1996-11-08 0:00 ` Robert A Duff
1996-11-12 0:00 ` Don Harrison
1996-11-12 0:00 ` Joachim Durchholz
1996-11-15 0:00 ` Richard Riehle
1996-11-16 0:00 ` Interfacing contracts (Was: Eiffel and Java + Ada dispatching) Geert Bosch
1996-11-17 0:00 ` Robert A Duff [this message]
1996-11-12 0:00 ` Eiffel and Java + Ada dispatching Robert A Duff
1996-11-13 0:00 ` Don Harrison
1996-11-13 0:00 ` Robert A Duff
1996-11-14 0:00 ` Don Harrison
1996-11-13 0:00 ` Jon S Anthony
1996-11-15 0:00 ` Don Harrison
1996-11-19 0:00 ` Jon S Anthony
1996-11-20 0:00 ` Don Harrison
1996-11-14 0:00 ` Robert I. Eachus
1996-11-14 0:00 ` Robert A Duff
1996-11-15 0:00 ` Don Harrison
1996-11-15 0:00 ` Robert I. Eachus
1996-11-19 0:00 ` Don Harrison
1996-11-18 0:00 ` Vincent Celier
1996-11-22 0:00 ` Don Harrison
1996-11-19 0:00 ` Jon S Anthony
1996-11-15 0:00 ` portmanteau (was Re: Eiffel and Java + Ada dispatching) Robert I. Eachus
1996-11-07 0:00 ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-07 0:00 ` Robb Nebbe
1996-11-12 0:00 ` Jon S Anthony
1996-11-01 0:00 ` Eiffel and Java Matthias Ernst
1996-11-01 0:00 ` Benedict A. Gomes
1996-11-01 0:00 ` William Clodius
1996-11-02 0:00 ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-02 0:00 ` Jon S Anthony
1996-11-04 0:00 ` Eiffel and Java Robert I. Eachus
1996-10-30 0:00 ` Jon S Anthony
1996-11-01 0:00 ` Don Harrison
1996-11-01 0:00 ` Jon S Anthony
1996-11-07 0:00 ` Marcos F. F. de Macedo
1996-11-11 0:00 ` Ian Joyner
1996-11-12 0:00 ` Don Harrison
1996-11-13 0:00 ` Norman H. Cohen
1996-11-15 0:00 ` Don Harrison
1996-11-14 0:00 ` Jon S Anthony
1996-11-15 0:00 ` Don Harrison
1996-11-19 0:00 ` Jon S Anthony
1996-11-21 0:00 ` Don Harrison
1996-11-12 0:00 ` Jon S Anthony
1996-10-31 0:00 ` Joachim Durchholz
1996-11-01 0:00 ` Jon S Anthony
1996-11-02 0:00 ` Jon S Anthony
1996-11-03 0:00 ` Eiffel and Java + Ada dispatching Joachim Durchholz
1996-11-04 0:00 ` Eiffel and Java Richard A. O'Keefe
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