From: "Raymond W. Magness" <magness@ucla.edu>
Subject: A Win95 GNAT and UNIX GNAT incompatibility
Date: 1996/11/11
Date: 1996-11-11T00:00:00+00:00 [thread overview]
Message-ID: <328825A5.2D@ucla.edu> (raw)
Ladies and Gentlemen,
In the course of finishing this project, I came across a version
incompatibility between Win 95 GNAT and UNIX GNAT. What I found is:
When you have a function that returns a pointer, UNIX GNAT does not like
it when you immediately use that pointer to access a data element in the
object being pointed to. Example:
If the function GET_ITEM returns a pointer to an object LINE which is a
record and has a field called DATA.
Do NOT do this in UNIX GNAT (but is ok in Win95 GNAT):
SOME_DATA := GET_ITEM.DATA; -- you will get a GNAT Bug
Error!
Unix likes this better:
LINE_PTR := GET_ITEM;
SOME_DATA := LINE_PTR.DATA;
I don't know why it does this, but it cost me a couple of hours to
figure it out :( I hope no one else has had to go through this.
Later...
--
Raymond W. Magness
Sergeant, United States Marine Corps
Computer Science, UCLA
magness@ucla.edu http://www.seas.ucla.edu/~magness
next reply other threads:[~1996-11-11 0:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-11-11 0:00 Raymond W. Magness [this message]
1996-11-14 0:00 ` A Win95 GNAT and UNIX GNAT incompatibility John English
1996-11-14 0:00 ` Robert Dewar
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox