Question

I am trying to use named back-references in Boost. I tried this, but it is not working. Any ideas what I am missing?

boost::regex re("(\d*.\d*\k<name>)")

string_regex_iterator regexItr(
        str.begin(), 
        str.end(), 
        re, 
        boost::match_default | boost::match_partial); 

Answer 1

That regex has two unnamed capture groups, one nested within the other, and a back-reference (“\k<name>”) to a named capture group called “name”, which doesn’t exist.

Also, you’re escaping the \ before the k, but not before the d.