Lisp, the sacred language of the now and forever

La lingua sacra ed eterna

I can feel the godforce emanating from it.

You will soon have your God and you will construct it with your own hands.

>>104
I think you're taking the word "pure" too seriously. My condolences. What it really means is that for same inputs the value will be the same at any moment in time. Since the output of the C preprocessor does not change in time, it is indeed a pure function (with the single caveat that Anal Elliott spoke about).

Now, of course all this is just an amusing fact to poke fun at Haskellists. But it is fact nonetheless. C is a purely functional language no less than Haskell.