[smitherfield]

Allegedly, the quality of STL <regex> implementations leaves much to be desired.

[alexhutcheson]

I default to using RE2[1] in most cases. If I really need backtracking, I would probably just use PCRE through the C++ wrapper[2], but that hasn't been a common need in my experience.

[1] https://github.com/google/re2/

[2] https://www.pcre.org/original/doc/html/pcrecpp.html