Can there be anything between keyword 'class' and class name in c++? -

i encountered code in c++ class has been defined :

class macro class_name {      public :       private :  } 

if saw on windows code, macro determine if want export or import given class.

it's common if dealing dll-s.

so, macro this:

#ifdef  projectname_exports  #define macrobeforeclassname __declspec(dllexport) #else #define macrobeforeclassname __declspec(dllimport) #endif 

if compile dll, projectname_exports preprocessor definition should defined, compiler export given class. if compile project using given dll, ...exports won't defined, compiler import given class.