My Lisp¶ ↑

Introduction¶ ↑

Here’s my (work in progress) interpretation of Peter Norvig’s Scheme. The language of implementation is Ruby, and I’m working in a TDD-style using TestUnit.

Usage¶ ↑

require 'lisp'

# I haven't implemented a default environment yet,
# here's a simple one
env = Env.new
env['+'] = Proc.new {|a,b| a + b}

# Eval the lisp code
code = '(+ 1 (+ 1 2))'
lisp_eval(parse(code), env) #=> 4