bulat.ziganshin:
Hello Felipe,
Saturday, March 7, 2009, 4:22:04 PM, you wrote:
So, I would like to make an UArray of LogFloat. They are a newtype of Double
this is possible in UArray reimplementation done in ArrayRef library http://haskell.org/haskellwiki/Library/ArrayRef although the library itself may be not compatible with ghc 6.10. try to search on hackage
Can't you also just using generic newtype deriving? E.g. a UArr instance for free: {-# LANGUAGE GeneralizedNewtypeDeriving #-} import Data.Array.Vector newtype LogFloat = LogFloat Double deriving (Eq,Ord,Show,Num,UA) main = print . sumU $ replicateU 1000 (LogFloat pi) Which, btw, still triggers all the usual fusion: $wfold :: Double# -> Int# -> Double# $wfold = \ (ww_s14A :: Double#) (ww1_s14E :: Int#) -> case ww1_s14E of wild_B1 { __DEFAULT -> $wfold (+## ww_s14A 3.141592653589793) (+# wild_B1 1); 1000 -> ww_s14A $ time ./A LogFloat 3141.5926535897806 ./A 0.00s user 0.00s system 154% cpu 0.004 total -- Don