How to exclude C++ raw string literals from syntax highlighting in Vim?

Add this

syntax match cString 'R"\([^(]*\)(\_.*)\1"'

to your custom C++ syntax file (normally ~/.vim/syntax/cpp.vim ; create this file if you don't have one).

Just add cpp-vim as a plugin. I have added strict support for newer string literals in pull-request #14.

This is what you get: http://bl.ocks.org/anonymous/raw/9442865

cpp-vim adds support for other C++11 stuff too.