Safe Haskell	Safe-Inferred
Language	Haskell2010

Data.Stream.Result

Synopsis

data Result s a = Result {
- resultState :: s
- output :: ~a
}
mapResultState :: (s1 -> s2) -> Result s1 a -> Result s2 a
apResult :: Result s1 (a -> b) -> Result s2 a -> Result (JointState s1 s2) b
newtype ResultStateT s m a = ResultStateT {
- getResultStateT :: s -> m (Result s a)
}

Documentation

A tuple that is strict in its first argument.

This type is used in streams and automata to encode the result of a state transition. The new state should always be strict to avoid space leaks.

Constructors

Result
Fields resultState :: s output :: ~a

Instances details

Bifunctor Result Source #
Instance details Defined in Data.Stream.Result Methods bimap :: (a -> b) -> (c -> d) -> Result a c -> Result b d # first :: (a -> b) -> Result a c -> Result b c # second :: (b -> c) -> Result a b -> Result a c #
Functor (Result s) Source #
Instance details Defined in Data.Stream.Result Methods fmap :: (a -> b) -> Result s a -> Result s b # (<$) :: a -> Result s b -> Result s a #

mapResultState :: (s1 -> s2) -> Result s1 a -> Result s2 a Source #

Apply a function to the state of a Result.

Analogous to Applicative's (<*>).

A state transformer with Result instead of a standard tuple as its result.

Constructors

ResultStateT
Fields getResultStateT :: s -> m (Result s a)

Instances details

Monad m => Applicative (ResultStateT s m) Source #
Instance details Defined in Data.Stream.Result Methods pure :: a -> ResultStateT s m a # (<>) :: ResultStateT s m (a -> b) -> ResultStateT s m a -> ResultStateT s m b # liftA2 :: (a -> b -> c) -> ResultStateT s m a -> ResultStateT s m b -> ResultStateT s m c # (>) :: ResultStateT s m a -> ResultStateT s m b -> ResultStateT s m b # (<*) :: ResultStateT s m a -> ResultStateT s m b -> ResultStateT s m a #
Functor m => Functor (ResultStateT s m) Source #
Instance details Defined in Data.Stream.Result Methods fmap :: (a -> b) -> ResultStateT s m a -> ResultStateT s m b # (<$) :: a -> ResultStateT s m b -> ResultStateT s m a #