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

6 Nov 2015

      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)

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

Dennis Raddle