/roc-lisp

Simple Lisp interpretor in Roc

Primary LanguageRocMIT LicenseMIT

Roc Lisp

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.

Requirements

  • Roc (tested with nightly 070d14a5d60)

Test

roc test

Run

Run an interactive REPL:

roc dev

Exit with Ctrl-D (EOF).

Examples

(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

Features

Values supported:

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

Next steps?

These are missing but should be easy to implement.

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