i am an expert in c++ but just a beginner in javascript and c# so i wanted to will unity 5 support c++
by the way C# is not a bit away from C++. I had 3 years knowledge of C++. It took me just 2 days to get that fluency in C#.
No, it will not support C++.
You can however use C++ in versions 3, 4, 5 by compiling a dll.
C++ experienced people should migrate directly to c# which is going to be really familiar.
That.
And there is already a thread about this; http://forum.unity3d.com/threads/246907-Unity-to-use-C
Closing.