[section Acknowledgments]

I am indebted to [@http://boost.org/people/joel_de_guzman.htm Joel de Guzman] and
[@http://boost.org/people/hartmut_kaiser.htm Hartmut Kaiser] for their expert advice
during the early states of xpressive's development. I am thankful for
[@http://boost.org/people/john_maddock.htm John Maddock]'s excellent work on his proposal
to add regular expressions to the standard library. I'd also like to thank
[@http://moderncppdesign.com/ Andrei Alexandrescu] for his input regarding the behavior
of nested regex objects, and [@http://boost.org/people/dave_abrahams.htm Dave Abrahams]
for his suggestions regarding the regex domain-specific embedded language. Noel Belcourt
helped porting xpressive to the Metrowerks CodeWarrior compiler.

[endsect]