[Haskell-beginners] DPH help

[Luca Ciciriello]

Hi All.

I'm trying to load in GHCi the following code:


{-# LANGUAGE Arrows #-}
{-# LANGUAGE PArr, ParallelListComp #-}

module Test where

import Control.Arrow
import Control.Parallel

dotp :: Num a => [:a:] -> [:a:] -> a
dotp xs ys = sumP [:x * y | x <- xs | y <- ys:]

......


Then I get the error: 

Not in scope 'sumP'.

What I have to import to avoid this error? Where is defined sumP?

Thanks in advance for any answer.

Luca