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Generalise type of emptyServer so it can be Entered

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This commit is contained in:
David Turner 2017-05-17 05:12:23 +00:00
parent f3ac10a1c4
commit a3c5f17749
2 changed files with 3 additions and 3 deletions
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4
servant-server/src/Servant/Server.hs
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@ -221,8 +221,8 @@ layoutWithContext p context =
--
-- >>> import Control.Monad.Reader
-- >>> import qualified Control.Category as C
-- >>> type ReaderAPI = "ep1" :> Get '[JSON] Int :<|> "ep2" :> Get '[JSON] String :<|> Raw
-- >>> let readerServer = return 1797 :<|> ask :<|> Tagged (error "raw server") :: ServerT ReaderAPI (Reader String)
-- >>> type ReaderAPI = "ep1" :> Get '[JSON] Int :<|> "ep2" :> Get '[JSON] String :<|> Raw :<|> EmptyAPI
-- >>> let readerServer = return 1797 :<|> ask :<|> Tagged (error "raw server") :<|> emptyServer :: ServerT ReaderAPI (Reader String)
-- >>> let nt = generalizeNat C.. (runReaderTNat "hi") :: Reader String :~> Handler
-- >>> let mainServer = enter nt readerServer :: Server ReaderAPI
--

2
servant-server/src/Servant/Server/Internal.hs
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@ -537,7 +537,7 @@ instance HasServer api context => HasServer (HttpVersion :> api) context where
data EmptyServer = EmptyServer deriving (Typeable, Eq, Show, Bounded, Enum)
-- | Server for `EmptyAPI`
emptyServer :: Server EmptyAPI
emptyServer :: ServerT EmptyAPI m
emptyServer = Tagged EmptyServer
-- | The server for an `EmptyAPI` is `emptyAPIServer`.