decus lex

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Article #701

#701

From: forsyth
Date: Tue, 12 May 1987 11:47

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It is not AT&T derived.
That is quite obvious once you look at the source!
Someone asked for a copy for inclusion in the DECUS distribution
about 7 years ago.  They changed it quite a bit to have it work under
RSX-11 with Dave Conroy's C compiler.  The input conventions
were based on those in the first edition of the Aho&Ullmann Dragon Book:
	%T Principles of Compiler Design
	%A A. V. Aho
	%A J. D. Ullman
	%I Addison-Wesley
	%C Reading, Mass.
	%D 1977
	%K AddWesley
and they are a bit strange, especially by comparison with 7th Edition lex.
(The newer dragon book uses the conventions of BTL lex.)
Also, it was a 6th edition program and had the usual assortment of
pointer mismatches.  Recently I put all the types right, and
changed the input syntax slightly, but I haven't done any real
work on it.  Perhaps the new fast lex `flex'
(advertised in comp.unix.wizards) might be a better choice.

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From: forsyth@minster.UUCP
Newsgroups: comp.org.decus
Subject: decus lex
Message-ID: <547818426.27380@minster.UUCP>
Date: Tue, 12-May-87 07:47:06 EDT
Article-I.D.: minster.547818426.27380
Posted: Tue May 12 07:47:06 1987
Date-Received: Sat, 16-May-87 10:10:52 EDT
Organization: Department of Computer Science, University of York, England
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