QBS + clang semantic highlighter parses headers as c rather then c++ source.

Basically, setting up hello world qbs application with some header file.
Clang semantic highlighter gives a very weird result on super simple code in header file:
http://www.zimagez.com/zimage/screenshot-22032014-181948.php

'class A' is underlined with an error "unknown typename 'class'".

This means the header parses as a c source, rather than c++.