Z:gnu-www-ja-stallman-kth--f332c2-In the Arizona compiler the in/en

In the Arizona compiler the instruction recognizer was generated with LEX. Your machine description was simply a LEX program that LEX would turn into a C function to recognize valid instructions as strings. What I have is instead a special purpose decision tree that's generated from a machine description written in this syntax as if it were LISP. And this recognizer is used as a subroutine for many different parts of the compiler.