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{-# OPTIONS_GHC -fglasgow-exts #-}
import qualified Data.ListLike as LL
import Numeric.LinearAlgebra
import Data.Monoid
import Data.Packed.Internal.Vector
import Foreign
instance (Storable a) => Monoid (Vector a) where
mempty = V { dim = 0, fptr = undefined, ptr = undefined }
mappend a b = mconcat [a,b]
mconcat = j . filter ((>0).dim)
where j [] = mempty
j l = join l
instance Storable a => LL.FoldableLL (Vector a) a where
foldl f x v = foldl f x (toList v)
foldr f x v = foldr f x (toList v)
instance Storable a => LL.ListLike (Vector a) a where
singleton a = fromList [a]
head a = a @> 0
tail a | dim a == 1 = mempty
| otherwise = subVector 1 (dim a -1) a
genericLength = fromIntegral.dim
v k = fromList [1..k] :: Vector Double
f k = k+(3::Double)
main = print $ (LL.map f [1..5] :: Vector Double)
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