Safe Haskell	Safe-Inferred
Language	Haskell2010

Darcs.Util.IndexedMonad

Synopsis

class Monad m where
- return :: a -> m i i a
- (>>=) :: m i j a -> (a -> m j k b) -> m i k b
- (>>) :: m i j a -> m j k b -> m i k b
class LiftIx t where
- liftIx :: m a -> t m i i a
when :: Monad m => Bool -> m i i () -> m i i ()
ifThenElse :: Bool -> a -> a -> a
class Monad m => MonadReader r m | m -> r where
- ask :: m i i r
- local :: (r -> r) -> m i i a -> m i i a
newtype ReaderT r m i j a = ReaderT {
- runReaderT :: r -> m i j a
}
asks :: MonadReader r m => (r -> a) -> m i i a

Documentation

class Monad m where Source #

An alternative monad class, indexed by a "from" and "to" state.

Methods

return :: a -> m i i a Source #

(>>=) :: m i j a -> (a -> m j k b) -> m i k b Source #

(>>) :: m i j a -> m j k b -> m i k b Source #

Instances details

Monad m => Monad (ReaderT r m) Source #
Instance details Defined in Darcs.Util.IndexedMonad Methods return :: a -> ReaderT r m i i a Source # (>>=) :: ReaderT r m i j a -> (a -> ReaderT r m j k b) -> ReaderT r m i k b Source # (>>) :: ReaderT r m i j a -> ReaderT r m j k b -> ReaderT r m i k b Source #

class LiftIx t where Source #

A class for indexed monad transformers, going from normal Haskell monads into our indexed monads.

Methods

liftIx :: m a -> t m i i a Source #

when :: Monad m => Bool -> m i i () -> m i i () Source #

class Monad m => MonadReader r m | m -> r where Source #

An indexed version of the standard MonadReader class

Methods

ask :: m i i r Source #

local :: (r -> r) -> m i i a -> m i i a Source #

Instances details

Monad m => MonadReader r (ReaderT r m) Source #
Instance details Defined in Darcs.Util.IndexedMonad Methods ask :: ReaderT r m i i r Source # local :: (r -> r) -> ReaderT r m i i a -> ReaderT r m i i a Source #

newtype ReaderT r m i j a Source #

An indexed version of the standard ReaderT transformer

Constructors

ReaderT
Fields runReaderT :: r -> m i j a

Instances details

Monad m => MonadReader r (ReaderT r m) Source #
Instance details Defined in Darcs.Util.IndexedMonad Methods ask :: ReaderT r m i i r Source # local :: (r -> r) -> ReaderT r m i i a -> ReaderT r m i i a Source #
Monad m => Monad (ReaderT r m) Source #
Instance details Defined in Darcs.Util.IndexedMonad Methods return :: a -> ReaderT r m i i a Source # (>>=) :: ReaderT r m i j a -> (a -> ReaderT r m j k b) -> ReaderT r m i k b Source # (>>) :: ReaderT r m i j a -> ReaderT r m j k b -> ReaderT r m i k b Source #

asks :: MonadReader r m => (r -> a) -> m i i a Source #