haskell-src-exts-1.24.0: tests/examples/InstanceSigs.hs

{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE InstanceSigs #-}
{-# LANGUAGE TypeFamilies #-}

instance SupportsDelta (Map k v) where
  type Delta (Map k v) = Map k v

  mkDelta :: Map k v -> Map k v -> Delta (Map k v)
  mkDelta = undefined