(Original issue 1199 created by endorama on 2016-01-26T15:06:29.389443+00:00)

Hello, I have found what I think is a wrong behaviour of the CppLexer.

complex, _Imaginary and atomic_* are not highlighted in any way, see attached screenshot. Is this the expected behaviour? In case it is not, I can submit a PR to fix this.

Thank you!