Safe Haskell	Safe-Inferred
Language	Haskell2010

Servant.Server.Internal.Handler

Synopsis

newtype Handler a = Handler {
- runHandler' :: ExceptT ServerError IO a
}
runHandler :: Handler a -> IO (Either ServerError a)
pattern MkHandler :: IO (Either ServerError a) -> Handler a

Documentation

newtype Handler a Source #

Constructors

Handler
Fields runHandler' :: ExceptT ServerError IO a

Instances

Instances details

MonadFail Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods fail :: String -> Handler a #
MonadIO Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods liftIO :: IO a -> Handler a #
Applicative Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods pure :: a -> Handler a # (<>) :: Handler (a -> b) -> Handler a -> Handler b # liftA2 :: (a -> b -> c) -> Handler a -> Handler b -> Handler c # (>) :: Handler a -> Handler b -> Handler b # (<*) :: Handler a -> Handler b -> Handler a #
Functor Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods fmap :: (a -> b) -> Handler a -> Handler b # (<$) :: a -> Handler b -> Handler a #
Monad Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods (>>=) :: Handler a -> (a -> Handler b) -> Handler b # (>>) :: Handler a -> Handler b -> Handler b # return :: a -> Handler a #
MonadCatch Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods catch :: (HasCallStack, Exception e) => Handler a -> (e -> Handler a) -> Handler a #
MonadMask Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods mask :: HasCallStack => ((forall a. Handler a -> Handler a) -> Handler b) -> Handler b # uninterruptibleMask :: HasCallStack => ((forall a. Handler a -> Handler a) -> Handler b) -> Handler b # generalBracket :: HasCallStack => Handler a -> (a -> ExitCase b -> Handler c) -> (a -> Handler b) -> Handler (b, c) #
MonadThrow Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods throwM :: (HasCallStack, Exception e) => e -> Handler a #
MonadBaseControl IO Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Associated Types type StM Handler a # Methods liftBaseWith :: (RunInBase Handler IO -> IO a) -> Handler a # restoreM :: StM Handler a -> Handler a #
MonadError ServerError Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods throwError :: ServerError -> Handler a # catchError :: Handler a -> (ServerError -> Handler a) -> Handler a #
MonadBase IO Handler Source #
Instance details Defined in Servant.Server.Internal.Handler Methods liftBase :: IO α -> Handler α #
Generic (Handler a) Source #
Instance details Defined in Servant.Server.Internal.Handler Associated Types type Rep (Handler a) :: Type -> Type # Methods from :: Handler a -> Rep (Handler a) x # to :: Rep (Handler a) x -> Handler a #
type StM Handler a Source #
Instance details Defined in Servant.Server.Internal.Handler type StM Handler a = Either ServerError a
type Rep (Handler a) Source #
Instance details Defined in Servant.Server.Internal.Handler type Rep (Handler a) = D1 ('MetaData "Handler" "Servant.Server.Internal.Handler" "servant-server-0.20.2-6Dh2Z3rk2uFLY6ywbrXTMM" 'True) (C1 ('MetaCons "Handler" 'PrefixI 'True) (S1 ('MetaSel ('Just "runHandler'") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (ExceptT ServerError IO a))))

runHandler :: Handler a -> IO (Either ServerError a) Source #

pattern MkHandler :: IO (Either ServerError a) -> Handler a Source #

Pattern synonym that matches directly on the inner IO action.

To lift IO actions that don't carry a ServerError, use liftIO instead.