README.md

lisp-evaluator

A lisp metacircular evaluator.

Prerequisites

Download and install scheme from here

Once you have scheme installed, run the repl and type the following

• (load "eval.scm")
• (driver-loop)

The evaluator is now running. You can now enter lisp expressions to evaluate. As of now, only the following functions from the scheme library are available:

• cons
• car
• cdr
• null?

Example

(define (append x y)
  (if (null? x)
      y
      (cons (car x)
            (append (cdr x) y))))

(append '(1 2 3) '(4 5 6))
>> (1 2 3 4 5 6)