[C++] Macro with arguments right after class keyword breaks all subsequent file

[ratijas]

What happened?

Qt has class annotation macros with string arguments. And it breaks everything else that follows it.

Here, for becomes a keyword, and the rest is a string:

class QT_DEPRECATED_VERSION_X_6_6("this for that")
QPropertyAlias : public QPropertyObserver

Here it kinda just works™:

class 
QT_DEPRECATED_VERSION_X_6_6("this for that")
QPropertyAlias : public QPropertyObserver