Safe Haskell	Safe
Language	Haskell98

Data.Ref

Description

Following an idea by Dominique Devriese: http://www.haskell.org/pipermail/libraries/2013-June/020185.html

Documentation

data T m a Source #

Constructors

Cons
Fields write :: a -> m () read :: m a

modify :: C m => T m a -> (a -> a) -> m () Source #

focus :: C m => T a b -> T m a -> T m b Source #

newCons :: C m => (a -> m ref) -> (ref -> a -> m ()) -> (ref -> m a) -> a -> m (T m a) Source #

class Monad m => C m where Source #

Methods

new :: a -> m (T m a) Source #

Instances

C IO Source #
Instance details Defined in Data.Ref Methods new :: a -> IO (T IO a) Source #
C STM Source #
Instance details Defined in Data.Ref Methods new :: a -> STM (T STM a) Source #
C (ST s) Source #
Instance details Defined in Data.Ref Methods new :: a -> ST s (T (ST s) a) Source #
C m => C (MaybeT m) Source #
Instance details Defined in Data.Ref Methods new :: a -> MaybeT m (T (MaybeT m) a) Source #
(Monoid w, C m) => C (WriterT w m) Source #
Instance details Defined in Data.Ref Methods new :: a -> WriterT w m (T (WriterT w m) a) Source #
(Monoid w, C m) => C (WriterT w m) Source #
Instance details Defined in Data.Ref Methods new :: a -> WriterT w m (T (WriterT w m) a) Source #
C m => C (StateT s m) Source #
Instance details Defined in Data.Ref Methods new :: a -> StateT s m (T (StateT s m) a) Source #
C m => C (StateT s m) Source #
Instance details Defined in Data.Ref Methods new :: a -> StateT s m (T (StateT s m) a) Source #
C m => C (IdentityT m) Source #
Instance details Defined in Data.Ref Methods new :: a -> IdentityT m (T (IdentityT m) a) Source #
C m => C (ExceptT e m) Source #
Instance details Defined in Data.Ref Methods new :: a -> ExceptT e m (T (ExceptT e m) a) Source #
(Error e, C m) => C (ErrorT e m) Source #
Instance details Defined in Data.Ref Methods new :: a -> ErrorT e m (T (ErrorT e m) a) Source #
C m => C (ReaderT r m) Source #
Instance details Defined in Data.Ref Methods new :: a -> ReaderT r m (T (ReaderT r m) a) Source #
C m => C (ContT r m) Source #
Instance details Defined in Data.Ref Methods new :: a -> ContT r m (T (ContT r m) a) Source #
(Monoid w, C m) => C (RWST r w s m) Source #
Instance details Defined in Data.Ref Methods new :: a -> RWST r w s m (T (RWST r w s m) a) Source #
(Monoid w, C m) => C (RWST r w s m) Source #
Instance details Defined in Data.Ref Methods new :: a -> RWST r w s m (T (RWST r w s m) a) Source #

lift :: (Monad m, MonadTrans t) => T m a -> T (t m) a Source #

liftIO :: MonadIO m => T IO a -> T m a Source #

newLifted :: (C m, MonadTrans t) => a -> t m (T (t m) a) Source #