From: Geert Bosch <geert@gonzo.sun3.iaf.nl>
Subject: Re: Depending on passing mechanism
Date: 1997/10/21
Date: 1997-10-21T00:00:00+00:00 [thread overview]
Message-ID: <62hra6$5j5$1@gonzo.sun3.iaf.nl> (raw)
In-Reply-To: EIDD1y.8Lz.0.-s@inmet.camb.inmet.com
Tucker Taft <stt@houdini.camb.inmet.com> wrote:
``As others have pointed out, in Ada 95 you *do* have control when
implementing a type to either force by-reference (by making the
underlying type tagged, protected, task, or limited record)''
For those cases where you do not want a type to be limited, but you
want to enforce passing-by-reference semantics, it is also possible
to use a record with a volatile component.
type Volatile_Type is null record;
pragma Volatile (Volatile_Type);
type Account is record
Force_By_Reference : Volatile_Type;
Amount : Currency_Type;
end record;
This enforces pass-by-reference semantics for any object of type account
without extra space or time overhead and without limiting assignment.
Regards,
Geert
next prev parent reply other threads:[~1997-10-21 0:00 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-10-13 0:00 Depending on passing mechanism Andre Spiegel
1997-10-13 0:00 ` Matthew Heaney
1997-10-14 0:00 ` Robert Dewar
1997-10-14 0:00 ` Robert Dewar
1997-10-14 0:00 ` Henry Baker
1997-10-15 0:00 ` Geert Bosch
1997-10-15 0:00 ` Henry Baker
1997-10-15 0:00 ` Jon S Anthony
1997-10-15 0:00 ` Robert Dewar
1997-10-16 0:00 ` Brian Rogoff
1997-10-17 0:00 ` Henry Baker
1997-10-18 0:00 ` Brian Rogoff
1997-10-18 0:00 ` Matthew Heaney
1997-10-19 0:00 ` Brian Rogoff
1997-10-21 0:00 ` Robert A Duff
1997-10-22 0:00 ` Robert Dewar
1997-10-22 0:00 ` Brian Rogoff
[not found] ` <dewar.877601826@merv>
1997-10-23 0:00 ` Brian Rogoff
1997-10-23 0:00 ` Henry Baker
1997-10-23 0:00 ` Brian Rogoff
1997-10-19 0:00 ` Fergus Henderson
1997-10-19 0:00 ` Brian Rogoff
1997-10-20 0:00 ` Fergus Henderson
1997-10-20 0:00 ` Henry Baker
1997-10-20 0:00 ` Tucker Taft
1997-10-21 0:00 ` Geert Bosch [this message]
1997-10-18 0:00 ` Fergus Henderson
1997-10-15 0:00 ` Robert Dewar
1997-10-15 0:00 ` Robert Dewar
1997-10-17 0:00 ` Andre Spiegel
1997-10-17 0:00 ` Henry Baker
1997-10-17 0:00 ` Jon S Anthony
1997-10-17 0:00 ` Robert I. Eachus
1997-10-21 0:00 ` Robert A Duff
1997-10-21 0:00 ` Peter Hermann
1997-10-22 0:00 ` Robert A Duff
1997-10-22 0:00 ` Brian Rogoff
1997-10-22 0:00 ` Henry Baker
1997-10-21 0:00 ` Robert Dewar
1997-10-22 0:00 ` Jon S Anthony
1997-10-22 0:00 ` Brian Rogoff
1997-10-15 0:00 ` Brian Rogoff
1997-10-19 0:00 ` Robert Dewar
1997-10-22 0:00 ` Henry Baker
1997-10-15 0:00 ` JP Thornley
1997-10-21 0:00 ` Robert A Duff
1997-10-22 0:00 ` Henry Baker
1997-10-21 0:00 ` Matthew Heaney
1997-10-22 0:00 ` Simon Wright
1997-10-23 0:00 ` Henry Baker
1997-10-23 0:00 ` Pat Rogers
1997-10-24 0:00 ` Robert Dewar
1997-10-23 0:00 ` Robert A Duff
1997-10-21 0:00 ` Keith Thompson
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