Code action: add additional constraint

[ndmitchell]

I just got:

C:\Neil\model\Main.hs:20:19: error:
    • No instance for (Hashable a) arising from a use of ‘hash’
      Possible fix:
        add (Hashable a) to the context of
          the type signature for:
            apply :: forall a. Int -> RW a -> Map.Map a Int -> Map.Map a Int
    • In the expression:
        hash (name, [(v, mp Map.! v) | v <- Set.toAscList $ Set.union r w])
      In an equation for ‘input’:
          input
            = hash

That could probably have been a code action.

[pepeiborra]

+1