Hi, I don't know about Unboxed, but you can define a newtype wrapper around Data.Vector.Storable that includes the size as a type-level natural. i.e. data Z data S n newtype Vec n a = Vec (Vector a) Then you can define a storable instance for Storable a => Vec n a, and thus you can define a storable vector for Vec n a. Not that you need something like this because storable instances must have fixed size. I don't know if this is also true for Unbox. I've done this using lists as the underlying container inside the typed vectors, but you could use Data.Vector.Storable instead with minimal effort: https://github.com/glutamate/space/blob/master/VectorsL.hs Tom On Wed, Nov 9, 2011 at 9:56 AM, kaffeepause73 <kaffeepause73@yahoo.de> wrote:
Hello,
quick question about unboxed Vectors :
Is it possible to create an unboxed vector of unboxed vector ? :
import qualified Data.Vector.Unboxed as V type UnboxedNestedVextor = V.Vector (V.Vector Int)
Alternatively I would have to use:
import qualified Data.Vector.Unboxed as V import qualified Data.Vector as VB
type UnboxedNestedVextor = VB.Vector (V.Vector Int)
Is there a rule of thumb how much quicker Unboxed Vectors are ?
Cheers Phil
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