Self as an input/output argument

Question

Hi,
does anyone know if self is a valid argument to a method that defines its
parameter as input/output?
The reason I ask is that I am trying to move an application from 2.0.F.2 to
3.0.C.0, and the TOOL compiler gives me an error that it can't find a
method with a signature of "x" and it has methods with signatures of "x",
"y" and "z". The only clue I have is that the compiler advises: "Check that
any values passed to output or input output parameters are values that can
be changed like variables or attributes."
I might add that I personally would not be using self as an argument to
input output parameters because of my C++ heritage. Passing "this" to a
member function that might change the value of "this" is not a great idea!
However, this is the code that I have to work on, warts and all, so any
help is gratefully received.
TIA
Nick.
Nick James [email protected]
612/404-4277 or
Consultant 414/814-3170
BORN Information Services Group
Volvo, Video, Velcro - I came, I saw, I stuck around.

Answer 1

Just out of curiosity,
What are some other such read-only attributes that are coming with
R3? That way, those of us still coding in R2 will know to avoid using
those as output parameters, and thus avoid having our code broken
when we move to R3.
Thanks!
Elias.
Claremont Technology Group, Inc.
111 W. Liberty St., Cols, OH 43215
[phone]
[email protected]
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To: jamesn @ ns.born.com (Nick James) @ internet
cc: forte-users @ Sagesoln.com @ internet (bcc: Elias Fayyad/Central
Region/Claremont)
From: dnelson @ forte.com (Don Nelson) @ INTERNET@WORLDCOM
Date: 05/27/97 12:48:18 PM CDT
Subject: Re: self as an input/output argument
Nick,
R3 does not allow you to change the value of self. It is now considered a
read-only variable. Read-only variables may not be passed to methods using
output parameters. R2 used to, but then the C++ compiler would, of course,
choke on it.
It was a convenient way to make the compiler fail if you needed to,
though....
Don
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