It's been nearly a year since I first announced my intention to build a new regular expression engine. It has finally reached a point where I am comfortable recommending it for general use. << xpressive 0.9 >> http://boost-sandbox.sourceforge.net/libs/xpressive - What is it? It is a regular expression engine which allows you to author regexes as expression templates (like Spirit) *or* as strings (like Boost.Regex). When written as an expression template, the regex is syntax-checked at compile-time and statically bound for maximal inlining and optimization. (See http://tinyurl.com/6k9p8 for more detail.) Also, regular expressions can nest and call each other recursively, which gives you the power of a context free grammar. That makes it appropriate for simple parsing tasks. (See http://tinyurl.com/4enn4 for more detail.) - What's the interface like? xpressive is a Boost.Regex work-alike. It follows the regex standardization proposal closely, but not too close! You can read about all the differences in xpressive's documentation. The domain-specific embeded language for xpressive is heavily influenced by Spirit. - Where can I read more? xpressive's documentation is online at: http://boost-sandbox.sourceforge.net/libs/xpressive - Where can I download the code? You can get the xpressive zip archive at: http://boost-sandbox.sourceforge.net/xpressive.zip It contains the source code and the documentation in PDF format. Alternatively, you can get xpressive directly from the boost-sandbox. Source code is at /boost-sandbox/boost/xpressive, and the regression test and documentation are at /boost-sandbox/libs/xpressive. Note: this is version 0.9. Check out the "Not Yet Implemented" section in the documentation to see why. I'll be working towards v1.0 in the coming weeks and months, but I am confident at this point that the interface is not likely to change. What's there is stable and solid and ready for (ab)use. Original announcement of xpressive: http://lists.boost.org/MailArchives/boost/msg55623.php Cheers, -- Eric Niebler Boost Consulting www.boost-consulting.com