Re: Naive question from a layman

John Lilley <>
16 Mar 1997 23:32:51 -0500

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Naive question from a layman (GB) (1997-03-14)
Re: Naive question from a layman (John Lilley) (1997-03-16)
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From: John Lilley <>
Newsgroups: comp.compilers
Date: 16 Mar 1997 23:32:51 -0500
Organization: Nerds for Hire, Inc.
References: 97-03-060
Keywords: parse

GB wrote:
> I still wonder, though, is there any yacc-like program out there
> that will produce more legible code? (I imagine such a program
> would be useful for little else other than didactic purposes).

PCCTS 1.33 produces LL(k) recursive-descent parsers in C/C++ that are
quite readable.

PCCTS 2.0, which is still under development, will produce Java (and
potentially other languages), and has an LL(1) lexer, which makes the
lexer output quite readable as well. In addition, it will include a
-diagnostic mode that lists all the rules and the parsing decisions
that are made at each junction, including lookahead sets and follow
sets. Very useful for understanding what is going on inside an LL(k)

john lilley

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