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From: stiles@aurora.laic.uucp (Randy Stiles)
Newsgroups: comp.lang.prolog
Subject: Prolog Pretty-Printer
Keywords: DCG, pretty-printer
Message-ID: <700@laic.UUCP>
Date: 5 Sep 89 18:51:57 GMT
Sender: news@laic.UUCP
Lines: 25


	In the C programming world, there exist many utilities to
beautify, or pretty-print source code, keeping comments and such
intact, but correctly indenting code blocks and generally making the
code much easier to read.

	I have yet to find such a utility for Prolog (Quintus Prolog
preferably), and I want one. Most Prolog environments have a clause
with which you can get a listing of any of your defined predicates,
without any comments.  This is not helpful.  It does not address a
source file as a whole, nor does it keep comments.

	So I am posting a request for information about any existing
pretty-printing utilities before I go off and write my own.  It would
seem that such a thing should exist.  Prolog's forte is the handling
of languages, via Definite Clause Grammars (DCG's), and parsing a file
of Prolog clauses to identify the components (for proper indentation)
is a plausible task.  I just think someone has to have done it
already.

	Thanks in advance for any replies I may receive.
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