> "Opinions on his coding style are divided, though general consensus seems to be that it's incomprehensible."

I wholeheartedly concur with popular opinion. It's like writing a program in obfuscated code.

Hmmm... his way of basically making C work like APL made me wonder: Is there a programming language out there that defines its own syntax in some sort of header and then uses that syntax for the actual code?

In racket, you can say something like "#lang X", which can modify the reader and let you create your own arbitrary syntax

forth and lisp?