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- Newsgroups: comp.lang.prolog
- Path: sparky!uunet!haven.umd.edu!decuac!pa.dec.com!decprl!decprl!vanroy
- From: vanroy@prl.dec.com (Peter Van Roy)
- Subject: Re: Occurs check
- Message-ID: <1992Dec15.131151.21406@prl.dec.com>
- Sender: news@prl.dec.com (USENET News System)
- Nntp-Posting-Host: prl332.prl.dec.com
- Organization: Digital Equipment Corporation - Paris Research Laboratory
- References: <1992Dec13.173016.8849@nntp.hut.fi>
- Date: Tue, 15 Dec 1992 13:11:51 GMT
- Lines: 22
-
- In article <1992Dec13.173016.8849@nntp.hut.fi>, jur@robin.cs.hut.fi (Jussi Rintanen) writes:
- >
- > Question 1: What implementations of Prolog implement the occurs check?
- > (Our university has both Sicstus and NU-Prolog.)
- >
-
- The Wild_LIFE system implements unification of psi-terms, which
- renders the occur check superfluous. Wild_LIFE is an
- implementation of LIFE, a language that elegantly generalizes
- Prolog. A psi-term is an open-ended dynamic record that may be
- cyclicá (i.e., it is a general rooted graph).
-
- Peterá
-
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- Peter Van Roy
- Digital Equipment Corporation Net: vanroy@prl.dec.com
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