Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!apple!agate!shelby!portia!dhinds
From: dhinds@portia.Stanford.EDU (David Hinds)
Newsgroups: comp.lang.pascal
Subject: Re: Turbo Pascal absolute variables crossing units
Summary: There's an easier way, isn't there?
Keywords: absolute variables units Borland Turbo Pascal TP4.0
Message-ID: <8405@portia.Stanford.EDU>
Date: 19 Jan 90 22:47:20 GMT
References: <3757@mit-caf.MIT.EDU>
Sender: David Hinds <dhinds@Portia.stanford.edu>
Organization: Stanford University
Lines: 16

In article <3757@mit-caf.MIT.EDU>, the@mit-caf.MIT.EDU (Siang-Chun The) writes:
> I have one Turbo Pascal unit that I want to completely hide within
> another unit.  The inner unit to be hidden has an automatically updated
> status variable that I want to be accessible to users of the outer unit.

    Your example might fail because references to addresses in other units
can't be resolved in a unit's interface section.  Though it wouldn't serve
your purpose, you could see if the compiler dies when the declaration is
in the implementation part of the unit.
    Simple workarounds would be to declare a pointer in the outer unit
interface section which the body of the unit sets to point to the status
variable in the inner unit.  Or you could declare a parameterless function
in the outer unit, which just returns the value of the status variable.

 - David Hinds
   dhinds@portia.stanford.edu