Recursive C macro not expanded

Question

I am working on a recursive macro. However, it seems that it is not expanded recursively. Here is a minimal working example to show what I mean:

// ignore input,         


        

Answer 1

You can't get the behaviour you want. The C preprocessor is, by design, not turing complete.

You can use multiple macros to get multiple replacements, but you will not achieve true recursion with an arbitrary number of replacements.