The author can be contacted at john - at - johnmaddock.co.uk; the home page for this library is at www.boost.org.

I am indebted to Robert Sedgewick's "Algorithms in C++" for forcing me to think about algorithms and their performance, and to the folks at boost for forcing me to think, period.

Eric Niebler, author of Boost.Expressive and the GRETA regular expression component, has shared several important ideas, in a series of long discussions.

Pete Becker, of Roundhouse Consulting, Ltd., has helped enormously with the standardisation proposal language.

The following people have all contributed useful comments or fixes: Dave Abrahams, Mike Allison, Edan Ayal, Jayashree Balasubramanian, Jan Bölsche, Beman Dawes, Paul Baxter, David Bergman, David Dennerline, Edward Diener, Peter Dimov, Robert Dunn, Fabio Forno, Tobias Gabrielsson, Rob Gillen, Marc Gregoire, Chris Hecker, Nick Hodapp, Jesse Jones, Martin Jost, Boris Krasnovskiy, Jan Hermelink, Max Leung, Wei-hao Lin, Jens Maurer, Richard Peters, Heiko Schmidt, Jason Shirk, Gerald Slacik, Scobie Smith, Mike Smyth, Alexander Sokolovsky, Hervé Poirier, Michael Raykh, Marc Recht, Scott VanCamp, Bruno Voigt, Alexey Voinov, Jerry Waldorf, Rob Ward, Lealon Watts, John Wismar, Thomas Witt and Yuval Yosef.

If I've missed your name off (I'm sure there are a few, just not who they are...) then please do get in touch.

I am also grateful to the manuals supplied with the Henry Spencer, PCRE, Perl and GNU regular expression libraries - wherever possible I have tried to maintain compatibility with these libraries and with the POSIX standard - the code however is entirely my own, including any bugs! I can absolutely guarantee that I will not fix any bugs I don't know about, so if you have any comments or spot any bugs, please get in touch.