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Re: Copying IDL objects [message #13054 is a reply to message #12981]

Fri, 02 October 1998 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

Hi Folks,

I wrote just a couple of minutes ago:

> This seems like a lot of work. I think I would write this
> function something like this:
>
> PRO My_Obj::Copy, out
> tags = N_Tags(self)
> For j=0,tags-1 DO out.(j} = self.(j)
> END

Mark Rivers kindly points out to me that this doesn't work,
for the simple reason that self is not a structure (even
though it can be accessed as if it were a structure in
a method). Thus, N_Tags returns a 0.

To make it work, I have to do this (with a bit of error
checking too :-):

PRO My_Obj::Copy, out
selfClass = Obj_Class(self)
outClass = Obj_Class(out)
IF selfClass NE outClass THEN BEGIN
ok = Dialog_Message('Object classes not identical.)
RETURN
END
ok = Execute('struct = {' + selfClass + '}')
tags = N_Tags(struct)
For j=0,tags-1 DO out.(j) = self.(j)
END

Cheers,

David

----------------------------------------------------------
David Fanning, Ph.D.
Fanning Software Consulting
E-Mail: davidf@dfanning.com
Phone: 970-221-0438, Toll-Free Book Orders: 1-888-461-0155
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Copying IDL objects By: rivers on Wed, 30 September 1998 00:00
		Re: Copying IDL objects By: J.D. Smith on Fri, 02 October 1998 00:00
		Re: Copying IDL objects By: davidf on Fri, 02 October 1998 00:00
		Re: Copying IDL objects By: davidf on Fri, 02 October 1998 00:00

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