C++ classes are displayed in gray.

[luohongk]

This is a great topic! But I seem to have found some bugs. I'm using Ubuntu 20.04. When I write code in C++, I want to customize a class and call it in the main function. When I call it at the end, the class name is not highlighted, it is grayed out. I don't know if it's my own configuration problem, I guess it's a potential bug.