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From: mac@uvacs.UUCP
Newsgroups: net.jokes
Subject: Strage error messages
Message-ID: <1059@uvacs.UUCP>
Date: Sun, 20-Nov-83 21:52:07 EST
Article-I.D.: uvacs.1059
Posted: Sun Nov 20 21:52:07 1983
Date-Received: Wed, 23-Nov-83 04:22:13 EST
Lines: 10


Algol 60 has only two unary operators that I am aware of: "NOT" and "-".
The syntax doesn't permit two adjacent unary ops, e.g.  NOT NOT x.  The
Dartmouth Algol compiler would emit the error message
	NOT NOT NOT ALLOWED
(everyone spoke uppercase in those days).  The explanation offered in the
manual was "not not not Algol".

Incidentally, because of a typists error the manual pages were headed
"ALGOL GO".