This is something the compiler can provide better than a library. I would go one step farther and ask for full Lisp-style macros in C. Let me generate code that

This is something the compiler can provide better than a library. I would go one step farther and ask for full Lisp-style macros in C. Let me generate code that can't be expressed with the basic C syntax. Then I can extend the type system with a dynamic array type that is really hard to misuse.