eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee VS CSP

In case anybody hasn't seen it, the repo has a lot more 'eeeees' for different languages. While I'm here, I may as well share some of my other favorite meme repos.

for anyone wondering, here's the code: e.c

E programming language

So there's precedent to what you say. You are right, the program would not have the runtime, but then it wouldn't be a Swift program (it would be a valid one, but you can't break certain extra rules) but something else. The reason we call it "language runtime" is because the runtime cost is due to the language choice. Refusing to code in the language and doing something else is a different language. We could write LISP code that the c compiler can interpret and compile fully but most people would call that LISP, not C.

#define LISP

One example might be a Lisp interpreter using C macros: https://github.com/BlueFlo0d/CSP/blob/master/csp.h

You mean this lisp embedded in c preprocessor?