From: davidk@os1.ese.lmsc.lockheed.com (David Kristola)
Subject: Re: To Initialise or not
Date: 1996/05/11
Date: 1996-05-11T00:00:00+00:00 [thread overview]
Message-ID: <4n0lqa$9dt@butch.lmsc.lockheed.com> (raw)
In-Reply-To: 31937B57.5B0@lmtas.lmco.com
I apologize if this has already been brought up. I missed it if it was.
You could always create a "bad" value to initialize pointers to, if null
is an acceptable alternative. By this i mean something like:
type Object is...
type Reference is access Object;
Bad_Reference : constant Reference := new Object; -- possibly with a "bad" bit set.
...
procedure Do_Something is
Pointer : Reference := Bad_Reference;
begin
...
if Pointer = Bad_Reference then
...
elsif Pointer = null then
In Ada95, you can even have Bad_Reference pointing to a static object.
---
david kristola
Work: davidk@os1.ese.lmsc.lockheed.com
Play: DJKristola@aol.com
next prev parent reply other threads:[~1996-05-11 0:00 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-04-29 0:00 To Initialise or not Steve O'Neill
1996-04-29 0:00 ` Ken Garlington
1996-04-29 0:00 ` Robert Dewar
1996-04-30 0:00 ` Ken Garlington
1996-04-30 0:00 ` Robert A Duff
1996-04-30 0:00 ` Robert A Duff
1996-04-30 0:00 ` Ken Garlington
1996-04-30 0:00 ` Robert A Duff
1996-05-01 0:00 ` Keith Thompson
1996-05-01 0:00 ` Robert A Duff
1996-05-02 0:00 ` Keith Thompson
1996-05-03 0:00 ` Robert A Duff
1996-05-01 0:00 ` Theodore E. Dennison
1996-05-01 0:00 ` Robert A Duff
1996-05-02 0:00 ` Theodore E. Dennison
1996-05-02 0:00 ` Chris Warack <sys mgr>
1996-05-02 0:00 ` Robert A Duff
1996-05-06 0:00 ` Ken Garlington
1996-05-02 0:00 ` Robert A Duff
1996-05-02 0:00 ` Michael F Brenner
1996-05-02 0:00 ` Robert A Duff
1996-05-04 0:00 ` Kevin D. Heatwole
1996-05-06 0:00 ` Ken Garlington
1996-05-07 0:00 ` Robert A Duff
1996-05-08 0:00 ` Ken Garlington
1996-05-08 0:00 ` Robert A Duff
1996-05-09 0:00 ` Ken Garlington
1996-05-09 0:00 ` Robert A Duff
1996-05-01 0:00 ` Dale Stanbrough
1996-05-02 0:00 ` Robert Dewar
1996-05-02 0:00 ` Theodore E. Dennison
1996-05-02 0:00 ` Robert A Duff
1996-05-06 0:00 ` Ken Garlington
1996-05-06 0:00 ` Ken Garlington
1996-05-07 0:00 ` Robert A Duff
1996-05-08 0:00 ` Ken Garlington
1996-05-09 0:00 ` Robert A Duff
1996-05-10 0:00 ` Robert A Duff
1996-05-10 0:00 ` Ken Garlington
1996-05-10 0:00 ` Robert A Duff
1996-05-10 0:00 ` Ken Garlington
1996-05-11 0:00 ` Robert A Duff
1996-05-11 0:00 ` David Kristola [this message]
1996-05-11 0:00 ` Robert A Duff
1996-05-13 0:00 ` Ken Garlington
1996-05-13 0:00 ` Ken Garlington
1996-05-13 0:00 ` Robert A Duff
1996-05-13 0:00 ` Ken Garlington
1996-05-13 0:00 ` Robert A Duff
1996-05-13 0:00 ` Ken Garlington
1996-05-01 0:00 ` Patrick Richard Wibbeler
1996-05-06 0:00 ` Ken Garlington
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