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From: dslg0849@uxa.cso.uiuc.edu (Daniel S. Lewart)
Newsgroups: comp.lang.pascal
Subject: Re: TP5.5: Can't store method in procedure variable
Keywords: Method Object Procedure TP5.5
Message-ID: <1990Dec4.232438.927@ux1.cso.uiuc.edu>
Date: 4 Dec 90 23:24:38 GMT
References: <1990Dec3.061013.22258@ux1.cso.uiuc.edu>
Sender: news@ux1.cso.uiuc.edu (News)
Organization: University of Illinois at Urbana
Lines: 18

The following are excerpts from a note sent to me by Mark Garlanger:
> What you have to remember is that each method has a 'Self' parameter.  That
> is   Obj.Method;   can be thought of as  Method(Obj);  look on page 17,18 of
> Turbo 5.5 OOP Guide.  So when you try to assign a method to a procedure
> variable, there are two addresses that need to be saved(Obj and the address of
> Method).  Since the compiler only has room for one address in the procedure
> variable, it prints out the compiler error.
> ...
> To me, this looks like the only way to do it.  Maybe someone else out there
> knows another solution to this.   Sorry I couldn't be of more help.

I believe that this is the correct explanation of my problem.  My last question
is whether @ can be applied to an object method.  The OOP Guide says 'yes', but
my experience says 'no'.

Thanks to everyone who helped,
Dan
d-lewart@uiuc.edu


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