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From: brock@tuvie (Inst.f.Prakt.Info 1802)
Newsgroups: comp.lang.prolog
Subject: Re: Standards question: behavior of arg/3
Keywords: ANSI, standard
Message-ID: <1920@tuvie>
Date: 18 Oct 90 12:32:14 GMT
References: <9888@bunny.GTE.COM> <3992@goanna.cs.rmit.oz.au>
Reply-To: brock@tuvie.UUCP (Ulrich Neumerkel Inst.f.Prakt.Info 1802)
Organization: Technical University of Vienna, EDP-Center
Lines: 12

In article <3992@goanna.cs.rmit.oz.au> ok@goanna.cs.rmit.oz.au (Richard A. O'Keefe) writes:
[...discussion of design principles for BIPs...]
>	?- arg(N, [a,b,c], X).
>makes perfect sense and has two solutions
>	N = 1, X = a ;
>	N = 2, X = [b,c] .

Which Prolog systems have arg/3 defined in this way?


Ulrich Neumerkel
ulrich@vip.at ulrich@vip.UUCP