Simple Lisp interpretor in Roc based on Peter Norvig's Python implementation.

This is meant as an educational example, for a full-featured Lisp implementation try Racket or SBCL.

• Roc (tested with nightly 070d14a5d60)

roc test

Run an interactive REPL:

roc dev

Exit with Ctrl-D (EOF).

(list 1 2 3)
(quote a)
(define n 5)
(set! n 6)

(define max (lambda (a b) (if (< a b) b a)))

(max 3 4)

=> 4

Values supported:

• Integers (Represented by Roc's I32)
• Lists
• t (true)
• nil (false / empty list)
• lambda (anonymous functions)
• symbols (e.g. (quote mysym))

These are missing but should be easy to implement.

• Floats
• Quote notation ('(a b) expands to (quote (a b))
• Comments