I did a similar thing for Chrome back in the day, to have the compiler check an `override` annotation: http://neugierig.org/software/chromium/notes/2011/01/cla

I did a similar thing for Chrome back in the day, to have the compiler check an `override` annotation: http://neugierig.org/software/chromium/notes/2011/01/clang.html http://neugierig.org/software/chromium/notes/2011/01/clang.h...