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From: "\[tricos.com\] Sascha Kimmel" <kimmel@tricos.com>
Newsgroups: comp.lang.beta
Subject: Cannot copy NONE?
Date: 11 Nov 1999 23:34:39 -0000
Organization: University of Aarhus, Department of Computer Science (DAIMI)
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Hi!

I found something quite interesting which does not help to generate
compact code - instead it becomes a bit complicated:

	t,u:^text;
	do
	none->t[];
	t.copy->u[];

	***  THIS GIVES A "REFERENCE ***
	*** IS NONE" RUNTIME ERROR !! ***

Well, normally one would not set a text reference to none, but if I read
some data into an array (^text) and just want to copy the values (not
the references!) of the corresponding variables into the array (or to
any other text reference), it is not possible to do this with small code
if it's possible that there are NONEs in there.

So do I really need to use

	(if (t[]<>none)
		then
		t.copy->u[];
		else
		none->u[];
	if);

instead of a small t.copy->u[] ?

Any help is appreciated!

Regards,
Sascha Kimmel