jaror, hace 7 meses en

Anyone want to guess how many errors this code generates:

{-# LANGUAGE DerivingVia #-}

module T where

newtype OrdList1 a = OrdList1 [a]
  deriving (Functor, Foldable, Traversable) via []

newtype OrdList2 a = OrdList2 [a]
  deriving (Functor, Foldable, Traversable) via Maybe

#haskell