It's not rich semantic features that are missing, but basic stuff such as C++11 keywords, handling of >>, etc. Those seem to be available in a cc-mode branch, b

It's not rich semantic features that are missing, but basic stuff such as C++11 keywords, handling of >>, etc. Those seem to be available in a cc-mode branch, but since cc-mode is maintained separately from Emacs, it takes more effort than it should to have an updated version of cc-mode in Emacs.