Never mind, I realized that I use the pragma incorrectly -- it wasn't at the top of the module. On Fri, Nov 6, 2015 at 3:26 PM, Dennis Raddle <dennis.raddle@gmail.com> wrote:
Thanks! I have a problem though. I read about automatic derivation of an NFData instance. I have GHC version 7.10.2. I tried the code below, but I get
Can't make a derived instance of Generic RawMidiEvent You need DeriveGeneric to derive an instance of this class. In the data declaration for 'RawMidiEvent'
{-# LANGUAGE DeriveGeneric, DeriveAnyClass #-}
import GHC.Generics (Generic) import Control.DeepSeq
data RawMidiEvent = RawMidiEvent { rmeStream :: Int , rmeChan :: Int , rmeStatus :: Int , rmeData1 :: Int , rmeData2 :: Int } deriving (Show,Eq,Generic,NFData)