From: "David Botton" <David@Botton.com>
Subject: Re: Checking Access Parameters to Procedures
Date: 2000/03/06
Date: 2000-03-06T00:00:00+00:00 [thread overview]
Message-ID: <rh_w4.852$iJ2.121345@news4.usenetserver.com> (raw)
In-Reply-To: q6r8cscb2h8c9pmjhei7q1fk8hn6gimfpj@4ax.com
"This" can not be NULL as it is passed in by "access". In the event that you
would like to pass in a NULL value, you would have to redefine your
procedure to have an in paramter of an access type.
For example:
package tst_pkg is
type my_ttype is tagged private;
type My_ttype_Access is access all My_ttype'Class;
procedure tst_proc(this : My_Ttype_Access);
Andy Askey wrote in message ...
>I want to check if a value passed into a procedure is NULL. For
>example:
> procedure tst_proc(this : access my_ttype'class);
next prev parent reply other threads:[~2000-03-06 0:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-03-06 0:00 Checking Access Parameters to Procedures Andy Askey
2000-03-06 0:00 ` David Botton [this message]
2000-03-07 0:00 ` Mark Lundquist
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