Re: [Haskell-beginners] strict evaluation and MIDI playback

6 Nov 2015

      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 
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)