How do you indent preprocessor statements?

Question

When there are many preprocessor statements and many #ifdef cascades, it\'s hard to get an overview since normally they are not indented. e.g.

#ifdef __WIN32__
#         


        

Answer 1

Just because preprocessing directives are "normally" not indented is not a good reason not to indent them:

#ifdef __WIN32__
    #include 
#else
    #include <..>
    #ifdef SOMEOTHER
        stmts
    #endif
    maybe stmts
#endif

If you frequently have multiple levels of nesting of preprocessing directives, you should rework them to make them simpler.