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From: hoge@hqafsc-vax.UUCP.UUCP
Newsgroups: mod.computers.vax
Subject: Re: How to tell if a global symbols is defined?
Message-ID: <8702230625.AA04600@ucbvax.Berkeley.EDU>
Date: Mon, 23-Feb-87 00:12:00 EST
Article-I.D.: ucbvax.8702230625.AA04600
Posted: Mon Feb 23 00:12:00 1987
Date-Received: Tue, 24-Feb-87 02:30:47 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: "Scott Hoge" <hoge@hqafsc-vax>
Organization: The ARPA Internet
Lines: 13
Approved: info-vax@sri-kl.arpa

There's a lexical function which does exactly what you're looking for (I
think). It's F$TYPE(symbol) and returns one of three values

	INTEGER if the symbol is an integer
	STRING if it's a string or
	a null string if its _undefined_

Hope this helps....

Scott Hoge
TRW, Inc.
hoge@hqafsc-vax.ARPA
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