Combining C++11 typed enums and visibility attributes, will make netbeans to think the whole syntax is incorrect.

You can test with this sample code:

#define PUBLIC	__attribute__ ((visibility ("default")))
#define PRIVATE	__attribute__ ((visibility ("hidden")))

enum LogLevel:unsigned short PUBLIC {
				LogLevel_Emergency	= 0,	// system is unusable
				LogLevel_Alert		= 1,	// action must be taken immediately
				LogLevel_Critical	= 2,	// critical conditions
				LogLevel_Error		= 3,	// error conditions
				LogLevel_Warning	= 4,	// warning conditions
				LogLevel_Notice		= 5,	// normal, but significant, condition
				LogLevel_Info		= 6,	// informational message
				LogLevel_Debug		= 7	// debug-level message
};

And see the items and the enum name marked in red. If you remove the macro PUBLIC, it is detected correctly though.