Re: [boost] [regex] nested negated character classes

John Maddock wrote:

...

The following trivial pattern:

boost::regex pat("[\\D]");

throws an "Invalid or trailing backslash" exception.

Yes, known problem, don't know how to fix it easily either

I peeked at your code. For narrow characters, you can easily merge the negated character class into the re_set.map_[256]. For wide characters, you'll need to store a list of negated character classes to re_set_long, just as you currently store a list of chars, ranges and equivalences. -- Eric Niebler Boost Consulting www.boost-consulting.com