On Tue, Jul 17, 2007 at 10:20:01PM +0000, Samuel J. J. Bronson wrote:
I just tried to compile this program (based on figure one in "The GRIN Project: A Highly Optimising Back End for Lazy Functional Languages"):
{-# OPTIONS_JHC -N -fffi #-}
import Jhc.Basics import Jhc.Int import Jhc.Num import Jhc.Order
default (Integer, Double)
main = sum (upto 1 10)
upto m n | m > n = [] | otherwise = m : upto (m+1) n
sum [] = 0 sum (x:xs) = x + sum xs
And I got a stupid error about a missing "put" method for IORef. It seems that the typechecker isn't getting rid of all the MetaVars in this program...
hmm.. main not being an actual IO action doesn't behave too well with overloading. (I really should make it just fail without an explicit option saying you want to evaluate an expression) what if you change main to main = print (sum (upto 1 10)) it would be nice if main were specialized to IO foo also. like main = return () will fail because it doesn't know to unify it with 'IO a'. though, I wouldn't want to do this in the typechecker, but rather when the entry point is created after E conversion. John -- John Meacham - ⑆repetae.net⑆john⑈