Macro-writing challenge

Write a macro check-arguments-non-nil to be used in function definitions, that would expand to assertion about every argument being non-nil.
The intended usage of this macro:

(defun foo (a b c d)
(check-arguments-non-nil)
foo-body)

This should expand to:

(defun foo (a b c d)
(assert (and (not (null a)) (not (null b)) (not (null c)) (not (null d)))
(a b c d)
"Null argument in FOO")
foo-body)

The macro must work whatever the number and names of the function parameters.

>>74
Haskell & Lisp use whitespace as a separator. Why the fuck do you need more punctuation than that? C syntax is just messy and backwards in its goals: Harder to parse, harder for the human to input, harder for the human to read.

When C came out, everybody was railing against the ridiculous semicolons everywhere, because other languages weren't stupid enough to do that. You're just living in an age of Stockholm Syndrome.