How do I implement no-op macro (or template) in C++?

Question

How do I implement no-op macro in C++?

#include    

#ifdef NOOP       
    #define conditional_noop(x) what goes here?   
#else       
    #         


        

Answer 1

Defining the macro to be void conveys your intent well.

#ifdef NOOP
    #define conditional_noop(x) (void)0
#else