🌇 A single-header LISP interpreter featuring garbage collection, tail-call optimisation, and macros.
This repository is no longer being maintained, future updates to Um may appear in sundown/Bias.
Example:
(defun fizzbuzz (x y) (defun fact (n)
(print (switch 0 (if (= n 1)
((% x 15) "FizzBuzz") 1
((% x 3) "Fizz") (* n (fact (- n 1)))))
((% x 5) "Buzz")
(0 x))) (defun fib (n)
(switch n
(if (< x y) (1 0)
(fizzbuzz (+ x 1) y) (2 1)
nil)) (n (+ (fib (- n 1)) (fib (- n 2))))))Running:
To build examples run cd examples/ && make.
Um is not ultimately intented to be a standalone interpreter, however um_repl() and interpret_string() functions are included as well as accompanying examples within examples/ which demonstrate it's use as a traditional command-line interpreter.
Otherwise #include path/um.h in your project and build as you normally would. Specifying -ansi or std=C89/C99 will not work as the interpreter is written in C11.
Inspirations: