"Eric Niebler" <eric@boost-consulting.com> wrote in message news:46605932.7000600@boost-consulting.com...
It's a poorly kept secret that I've been adding new features to Xpressive on CVS HEAD for a while now. So here are the features already implemented (documentation forthcoming) for Xpressive 2.0:
Having used most of these new features, I'd like to emphasize what a huge jump in expressive power (pun intended) this gives to Xpressive. Now, you can define a complete static context free grammar at compile time and replace any part or parts of it at run time. You get both the speed of a static grammar and the flexibility of a run-time grammar. Also, the custom assertions let you embed semantic checks right into your regular expression. This is much better than waiting to check semantics after a regular expression has completed. Great job, Eric. Dave Jenkins