Prolog and evaluating expressions

James Sison <the_evil_trembles@yahoo.com>
Thu, 4 Oct 2007 17:47:49 -0700 (PDT)

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Related articles
Prolog and evaluating expressions the_evil_trembles@yahoo.com (James Sison) (2007-10-04)
Re: Prolog and evaluating expressions nmh@t3x.org (Nils M Holm) (2007-10-05)
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From: James Sison <the_evil_trembles@yahoo.com>
Newsgroups: comp.compilers
Date: Thu, 4 Oct 2007 17:47:49 -0700 (PDT)
Organization: Compilers Central
Keywords: prolog, question

I'm trying to write this prolog interpreter but i encountered a
problem. Let's say i'm evaluating a rule and i found a possible
solution. How will i store my current position in the parse tree of
the rule if i'm going back to it when i backtrack? I'm thinking of
using a stack but then, i have no idea how to use it for this
application. Do you guys have any opinions on the matter?


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