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Jeffrey Kegler
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Marpa::R2::Acknowledgements - Marpa acknowledgements


Marpa is directly derived from two other parsers. The first was discovered by John Aycock and R. Nigel Horspool and is described in their Aycock and Horspool 2002. The second was described by Joop Leo and is described in Leo 1991. Aycock, Horspool, and Leo, in turn, based their algorithms on the algorithm discovered by Jay Earley. I combined the Aycock-Horspool algorithm with the Leo algorithm, and added significant changes of my own.

I'm grateful to Randal Schwartz for his support over the years that I've been working on Marpa. My chats with Larry Wall have been few and brief, but his openness to new ideas has been a major encouragement and his insight into the relationship between "natural language" and computer language has been a major influence. More recently, Allison Randal and Patrick Michaud have been generous with their very valuable time. They might have preferred that I volunteered as a Parrot cage-cleaner, but if so, they were too polite to say.

Many at perlmonks.org answered questions for me. I used answers from chromatic, Corion, dragonchild, jdporter, samtregar and Juerd, among others, in writing this module. I'm just as grateful to those whose answers I didn't use. My inquiries were made while I was thinking out the code and it wasn't always 100% clear what I was after. If the butt is moved after the round, it shouldn't count against the archer.

In writing the Pure Perl version of Marpa, I benefited from studying the work of Francois Desarmenien (Parse::Yapp), Damian Conway (Parse::RecDescent) and Graham Barr (Scalar::Util). Adam Kennedy patiently instructed me in module writing, both on the finer points and on issues about which I really should have know better.

I am very grateful to Ruslan Zakirov for generously starting, and agreeing to moderate, the "Marpa parser" mailing list. It is hard to describe how important informed and constructive feedback is to a lone laborer on a complex and large project like Marpa, and I greatly appreciate all the contributors to the list. In addition to Ruslan, Peter Stuifzand and Ron Savage stand out for their contributions. I am especially grateful to Ron, who has been a very aggressive early adopter of all Marpa's versions.

For the Windows port of Marpa, I am indebted to the work of Jean-Damien Durand.

Copyright and License

  Copyright 2013 Jeffrey Kegler
  This file is part of Marpa::R2.  Marpa::R2 is free software: you can
  redistribute it and/or modify it under the terms of the GNU Lesser
  General Public License as published by the Free Software Foundation,
  either version 3 of the License, or (at your option) any later version.

  Marpa::R2 is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser
  General Public License along with Marpa::R2.  If not, see