From: Corey Ashford <yeroca@rocketmail.com>
Subject: Re: Question for the folks who designed Ada95
Date: 1999/04/27
Date: 1999-04-27T00:00:00+00:00 [thread overview]
Message-ID: <3725FAD0.917331E4@rocketmail.com> (raw)
In-Reply-To: 7g3b5g$p92$1@nnrp1.dejanews.com
Robert Dewar wrote:
>
> In article <7g2qu4$ca4$1@usenet.rational.com>,
> "Corey Ashford" <yeroca@rocketmail.com> wrote:
> >
> > The problem with the interfaces package shift
> > operators is that they have fixed types. So it's
> > difficult to write code for types whose size can vary.
>
> What we do in GNAT to address this problem is to make the
> shift operators intrinsics. Here is a typical declaration
> from the Interfaces spec:
>
> pragma Import (Intrinsic, Shift_Left);
>
> The nice thing about this approach is that indeed you
> *can* apply this intrinsic to a user defined type. For
> example you can put the following in your code.
>
> type My_Modular is mod 2**Integer'Size;
> function Shift_Left
> (Value : My_Modular;
> Amount : Natural)
> return My_Modular;
> pragma Import (Intrinsic, Shift_Left);
>
> and this will work fine. Of course this is not guaranteed
> to be portable (perhaps the ARG should look at this one,
> since it is a perfectly legitimate implementation
> decision).
>
Thanks for the idea! I'll look into this one.
- Corey
next prev parent reply other threads:[~1999-04-27 0:00 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-04-26 0:00 Question for the folks who designed Ada95 Corey Ashford
1999-04-27 0:00 ` Samuel Mize
1999-04-27 0:00 ` Samuel Mize
1999-04-27 0:00 ` Robert Dewar
1999-04-28 0:00 ` Samuel Mize
1999-04-28 0:00 ` Samuel Mize
1999-04-28 0:00 ` Corey Ashford
1999-04-28 0:00 ` Robert Dewar
1999-04-29 0:00 ` Corey Ashford
1999-04-29 0:00 ` Robert Dewar
1999-04-29 0:00 ` Fraser Wilson
1999-04-29 0:00 ` Marin David Condic
1999-04-29 0:00 ` Robert Dewar
1999-04-28 0:00 ` Corey Ashford
1999-04-28 0:00 ` Corey Ashford
1999-04-27 0:00 ` Robert Dewar
1999-04-27 0:00 ` Corey Ashford [this message]
1999-04-27 0:00 ` Tarjei Tj�stheim Jensen
1999-04-27 0:00 ` Larry Kilgallen
1999-04-27 0:00 ` bill
1999-04-27 0:00 ` Robert Dewar
1999-04-27 0:00 ` Al Christians
1999-04-27 0:00 ` Larry Kilgallen
1999-04-27 0:00 ` Al Christians
1999-04-28 0:00 ` Robert A Duff
1999-04-28 0:00 ` Robert Dewar
1999-04-29 0:00 ` Matthew Heaney
1999-04-29 0:00 ` Jean-Pierre Rosen
1999-04-29 0:00 ` Robert Dewar
1999-04-27 0:00 ` dennison
1999-04-27 0:00 ` Robert Dewar
1999-04-29 0:00 ` Robert A Duff
1999-04-27 0:00 ` Robert Dewar
1999-04-28 0:00 ` Corey Ashford
1999-04-28 0:00 ` Robert Dewar
1999-04-28 0:00 ` Robert A Duff
1999-04-28 0:00 ` Robert Dewar
1999-04-29 0:00 ` Robert A Duff
1999-04-29 0:00 ` Corey Ashford
1999-04-29 0:00 ` Corey Ashford
1999-04-29 0:00 ` Robert Dewar
1999-04-29 0:00 ` Fraser Wilson
1999-04-29 0:00 ` Mark A Biggar
1999-04-30 0:00 ` Tucker Taft
1999-04-29 0:00 ` Tucker Taft
1999-04-29 0:00 ` Marin David Condic
1999-04-30 0:00 ` David Brown
1999-04-29 0:00 ` Geert Bosch
1999-04-27 0:00 ` David Starner
1999-04-27 0:00 ` Robert Dewar
1999-04-27 0:00 ` David Starner
1999-04-28 0:00 ` Samuel Mize
1999-04-28 0:00 ` Robert Dewar
1999-04-28 0:00 ` Tarjei Tj�stheim Jensen
1999-04-28 0:00 ` dennison
1999-04-28 0:00 ` Robert Dewar
1999-04-28 0:00 ` Robert A Duff
1999-04-28 0:00 ` Brian Hanson
1999-04-28 0:00 ` bill
1999-04-29 0:00 ` Robert S. White
1999-04-29 0:00 ` Robert Dewar
1999-04-30 0:00 ` Robert S. White
1999-04-30 0:00 ` dennison
1999-04-29 0:00 ` Robert Dewar
1999-04-30 0:00 ` Robert S. White
1999-04-29 0:00 ` Robert Dewar
1999-04-28 0:00 ` Pat Rogers
1999-04-29 0:00 ` Robert Dewar
1999-04-29 0:00 ` dennison
1999-04-29 0:00 ` Pat Rogers
1999-04-30 0:00 ` Robert Dewar
1999-04-28 0:00 ` Robert Dewar
1999-04-28 0:00 ` Robert A Duff
1999-04-29 0:00 ` Tarjei Tj�stheim Jensen
1999-04-29 0:00 ` Bill Ghrist
1999-04-28 0:00 ` Larry Kilgallen
1999-04-28 0:00 ` Robert A Duff
1999-04-29 0:00 ` Question for the folks who designed Ad David Kristola
1999-04-29 0:00 ` Paul Duquennoy
1999-04-29 0:00 ` Question for the folks who designed Ada95 Aidan Skinner
1999-04-30 0:00 ` Matthew Heaney
1999-04-27 0:00 ` Matthew Heaney
1999-04-27 0:00 ` Corey Ashford
1999-04-28 0:00 ` Robert A Duff
1999-04-28 0:00 ` Keith Thompson
1999-04-29 0:00 ` Robert A Duff
1999-04-28 0:00 ` Marin David Condic
1999-04-27 0:00 ` Matthew Heaney
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