add all absolutely necessary derived instances
commitfb8bb5ced89af600cbf7bcadfdfc08a02dfe7381
authorDave Della Costa <ddellacosta@gmail.com>
dateSun 24 Mar 2019, 20:21 (8 years ago)
parent160bf30
katip/src/Katip.hs+1−1
@@ -44,7 +44,7 @@
4444--
4545-- newtype App m a = App {
4646-- unApp :: ReaderT Config m a
47−-- } deriving (Functor, Applicative, Monad) -- more instances as needed
47+-- } deriving (Functor, Applicative, Monad, MonadIO, MonadReader Config) -- these are necessary
4848--
4949--
5050-- -- These instances get even easier with lenses!