Heist is definitely one of the better-designed interpreter I've seen. I've been a James Coglan-fan ever since I stumbled upon it! He also has an excellent vide

Heist is definitely one of the better-designed interpreter I've seen. I've been a James Coglan-fan ever since I stumbled upon it! He also has an excellent video where he creates a Scheme interpreter in 15 minutes (no sound unfortunately): http://vimeo.com/4339116 http://vimeo.com/4339116