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000111_icon-group-sender _Thu May 18 16:24:39 2000.msg
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Return-Path: <icon-group-sender>
Received: (from root@localhost)
by baskerville.CS.Arizona.EDU (8.9.1a/8.9.1) id QAA28120
for icon-group-addresses; Thu, 18 May 2000 16:23:25 -0700 (MST)
Message-Id: <200005182323.QAA28120@baskerville.CS.Arizona.EDU>
From: "J.R. Sampson" <jsampson@indexes.u-net.com>
To: icon-group@optima.CS.Arizona.EDU
Date: Thu, 18 May 2000 22:52:24 +0100
Subject: Logicon Prolog interpreter
Errors-To: icon-group-errors@optima.CS.Arizona.EDU
Status: RO
Hello -
I have been looking at Alan Finlay's Prolog interpreter v.4 which Mr
Van Dorp kindly sent me some time ago.
Impressions so far:
At first I thought it didn't like me, but I have found postings about it
in the newsgroup file group90a.txt in the newsgroup directory in the
Icon FTP site. For the first time I was able to enter material to the
interpreter without it complaining of a syntax error every time - a
'Eureka' moment for me as always.
There is documentation in group90a.txt for Version 2, but Version 4
is more advanced, implementing assert and retract clauses etc. I
have not been able to find the test files test1.plg etc. that are
mentioned in the postings.
Queries should not have spaces after the prefix ':-' or ?-' e.g.
:-predicate,....,predicate. I think on the whole LogIcon does not like
spaces at all, but I haven't experimented much.
I think files for it to 'consult' should strictly be UNIX format text files
rather than MS-DOS format.
The interpreter itself is in the above-mentioned archive file, as well
as its predecessors, but beware of emailer mangling of the format.
Regards
_John Sampson_