Cytowanie Andy Little <andy@servocomm.freeserve.co.uk>:
Boost already has Regex. What is different about xpressive?
I can not take part in full review for variety of reasons (primary I have little knowledge of the problem domain and I'm on vacation now), but there is something very important about xpressive - it provides static (compile-time) regular expressions. This allows an extra performance boost, which is very important for some users - eg. my colleagues at work. We use Boost.Regex extensively and parts of our software are very CPU-bound. Switch to xpressive could free some (badly needed) CPU cycles. For the same reason my colleagues are considering switch to Spirit, but learning curve (and library complexity) seems to be steeper. If my voice is worth anything, I would strongly vote YES due to performance benefits. Besides, I believe it is just fine to have more that one implementation of regex if they are sufficiently different (choice is a Good Thing). B.