From: Douglas Livingstone <rampant@...>
Date: 2006-05-24T11:24:00+09:00
Subject: Re: Zed and Luis drop the bomb on Ruby's poor performance

2006/5/24, Logan Capaldo <logancapaldo@gmail.com>:
>
> How about we rewrite the ruby runtime as a combination of macros and
> functions in Lisp, use ParseTree to get the S-Exp representation of a
> ruby program and then feed that into our Lisp compiler? Instant
> speedy ruby! ;)
>

With an install of ParseTree:

$ cat example.rb
#!/usr/local/bin/ruby
def sum(a, b)
  return a+b
end

a = 3
b = 4
c = pythag(a, b)
puts c

$ cat lispify.rb
#!/usr/local/bin/ruby

def lispify(code)
  code.gsub!(/[:,]/, '')
  code.gsub!(/\[/, '(')
  code.gsub!(/\]/, ')')
end

code = $stdin.read

puts lispify(code)

$ cat example.rb | parse_tree_show -f | ./lispify.rb
((defn
  sum
  (scope
   (block
    (args a b)
    (return (call (lvar a) + (array (lvar b)))))))
 (lasgn a (lit 3))
 (lasgn b (lit 4))
 (lasgn c (fcall pythag (array (lvar a) (lvar b))))
 (fcall puts (array (lvar c))))

So, it looks like Lisp to me! Now, some macros?

Douglas