> - I wanted a form to register new types, so it could work for user-defined types; Yes, I had the same urge. You can easily fall into the trap of too many fe

> - I wanted a form to register new types, so it could work for user-defined types; Yes, I had the same urge. You can easily fall into the trap of too many features on the list. I settled on keeping user types out: you can always write a stringify() and pass that to the printf. Not the same, I know. But a more finite project. > - the C pre-processor knows nothing about lists that can be expanded multiple times; Yeah, that's a hack. Look at the 'VA_EXP()' macros in include/va_print/base.h. Ugly. Incomprehensible. > - variadic C macros are ugly hacks. Absolutely. But I think there is no other way in C. > Actually, if the C pre-processor supported lists, it would be possible to implement RTTI in C. I couldn't resist to put in '%t' which prints the C type of the argument...