Rail On Rails
Posted by flori Wed, 06 Jun 2007 23:47:00 GMT
I just found this link to the rail programming language in matz' blog. It has a rather beautiful layout as you can see in the following implementation of the Ackermann function:
$ 'main' (--)
\ Read m and n as input. Just one number each for now
\ Input is in the form "m\rn" where \r is a return character
\-[Enter m: ]oi(!m!)[\n\]o-[Enter n: ]oii(!n!)[\n\]o-----(n)-(m)-{ackermann}-[): ](n)[,](m)[A(]oooooo--#
$ 'ackermann' (n m -- A(m,n)) A(m,n) = n+1 if m=0
\ = A(m-1,1) if m>0 and n=0
\ = A(m-1,A(m,n-1)) if m>0 and n>0
\-(!m!)-(!n!)-\
|
/
/---q(m)0--
|
t^f f/-(n)1s-(m)-{ackermann}-(m)1s-{ackermann}-#
/ \-(n)0q--<
| t\-1-(m)1s-{ackermann}-#
\-(n)1a-#Yeah, it's an esoteric language. Matz sure doesn't joke when he says, that he's a programming language geek. I wonder when the rail hackers will start to code a web framework and call it Rail On Rails?