Control.Effect.Embed

Effects

newtype Embed b m a where

An effect for embedding actions of a base monad into the current one.

Constructors

Embed

Fields

• :: { unEmbed :: b a
•    } -> Embed b m a

Actions

embed :: Eff (Embed b) m => b a -> m a

Interpreters

runM :: Monad m => RunMC m a -> m a

Extract the final monad m from a computation of which no effects remain to be handled except for Embed m.

embedToEmbed :: forall b b' m a. Eff (Embed b') m => (forall x. b x -> b' x) -> InterpretReifiedC (Embed b) m a -> m a

Transform an Embed effect into another Embed effect by providing a natural transformation to convert monadic values of one monad to the other.

This has a higher-rank type, as it makes use of InterpretReifiedC. This makes embedToEmbed very difficult to use partially applied. In particular, it can't be composed using ..

If performance is secondary, consider using the slower embedToEmbedSimple, which doesn't have a higher-rank type.

embedToMonadBase :: (MonadBase b m, Carrier m) => EmbedToMonadBaseC b m a -> m a

Run an Embed b effect if b is the base of the current monad m.

embedToMonadIO :: (MonadIO m, Carrier m) => EmbedToMonadIOC m a -> m a

Run an Embed IO effect if the current monad m is a MonadIO.

Simple variants

embedToEmbedSimple :: forall b b' m a p. (Eff (Embed b') m, Threaders '[ReaderThreads] m p) => (forall x. b x -> b' x) -> InterpretSimpleC (Embed b) m a -> m a

Transform an Embed effect into another Embed effect by providing a natural transformation to convert monadic values of one monad to the other.

This is a less performant version of embedToEmbed that doesn't have a higher-rank type, making it much easier to use partially applied.

Carriers

newtype RunMC m a

The carrier for runM, which carries no effects but Embed m.

Constructors

RunMC (m a)

Instances

MonadBase b m => MonadBase b (RunMC m)

Defined in Control.Effect.Embed

Methods

liftBase :: b α -> RunMC m α

MonadBaseControl b m => MonadBaseControl b (RunMC m)

Defined in Control.Effect.Embed

Associated Types

type StM (RunMC m) a :: Type

Methods

liftBaseWith :: (RunInBase (RunMC m) b -> b a) -> RunMC m a

restoreM :: StM (RunMC m) a -> RunMC m a

MonadTrans (RunMC :: (Type -> Type) -> Type -> Type)

Defined in Control.Effect.Embed

Methods

lift :: Monad m => m a -> RunMC m a

MonadTransControl (RunMC :: (Type -> Type) -> Type -> Type)

Defined in Control.Effect.Embed

Associated Types

type StT RunMC a :: Type

Methods

liftWith :: Monad m => (Run RunMC -> m a) -> RunMC m a

restoreT :: Monad m => m (StT RunMC a) -> RunMC m a

Monad m => Monad (RunMC m)

Defined in Control.Effect.Embed

Methods

(>>=) :: RunMC m a -> (a -> RunMC m b) -> RunMC m b

(>>) :: RunMC m a -> RunMC m b -> RunMC m b

return :: a -> RunMC m a

fail :: String -> RunMC m a

Functor m => Functor (RunMC m)

Defined in Control.Effect.Embed

Methods

fmap :: (a -> b) -> RunMC m a -> RunMC m b

(<$) :: a -> RunMC m b -> RunMC m a

MonadFix m => MonadFix (RunMC m)

Defined in Control.Effect.Embed

Methods

mfix :: (a -> RunMC m a) -> RunMC m a

MonadFail m => MonadFail (RunMC m)

Defined in Control.Effect.Embed

Methods

fail :: String -> RunMC m a

Applicative m => Applicative (RunMC m)

Defined in Control.Effect.Embed

Methods

pure :: a -> RunMC m a

(<*>) :: RunMC m (a -> b) -> RunMC m a -> RunMC m b

liftA2 :: (a -> b -> c) -> RunMC m a -> RunMC m b -> RunMC m c

(*>) :: RunMC m a -> RunMC m b -> RunMC m b

(<*) :: RunMC m a -> RunMC m b -> RunMC m a

MonadIO m => MonadIO (RunMC m)

Defined in Control.Effect.Embed

Methods

liftIO :: IO a -> RunMC m a

Alternative m => Alternative (RunMC m)

Defined in Control.Effect.Embed

Methods

empty :: RunMC m a

(<|>) :: RunMC m a -> RunMC m a -> RunMC m a

some :: RunMC m a -> RunMC m [a]

many :: RunMC m a -> RunMC m [a]

MonadPlus m => MonadPlus (RunMC m)

Defined in Control.Effect.Embed

Methods

mzero :: RunMC m a

mplus :: RunMC m a -> RunMC m a -> RunMC m a

MonadThrow m => MonadThrow (RunMC m)

Defined in Control.Effect.Embed

Methods

throwM :: Exception e => e -> RunMC m a

MonadCatch m => MonadCatch (RunMC m)

Defined in Control.Effect.Embed

Methods

catch :: Exception e => RunMC m a -> (e -> RunMC m a) -> RunMC m a

MonadMask m => MonadMask (RunMC m)

Defined in Control.Effect.Embed

Methods

mask :: ((forall a. RunMC m a -> RunMC m a) -> RunMC m b) -> RunMC m b

uninterruptibleMask :: ((forall a. RunMC m a -> RunMC m a) -> RunMC m b) -> RunMC m b

generalBracket :: RunMC m a -> (a -> ExitCase b -> RunMC m c) -> (a -> RunMC m b) -> RunMC m (b, c)

Monad m => Carrier (RunMC m)

Defined in Control.Effect.Embed

Associated Types

type Derivs (RunMC m) :: [Effect]

type Prims (RunMC m) :: [Effect]

Methods

algPrims :: Algebra' (Prims (RunMC m)) (RunMC m) a

reformulate :: Monad z => Reformulation' (Derivs (RunMC m)) (Prims (RunMC m)) (RunMC m) z a

algDerivs :: Algebra' (Derivs (RunMC m)) (RunMC m) a

type StT (RunMC :: (Type -> Type) -> Type -> Type) a

Defined in Control.Effect.Embed

type StT (RunMC :: (Type -> Type) -> Type -> Type) a = StT (IdentityT :: (Type -> Type) -> Type -> Type) a

type Derivs (RunMC m)

Defined in Control.Effect.Embed

type Derivs (RunMC m) = (Embed m :: (Type -> Type) -> Type -> Type) ': ([] :: [(Type -> Type) -> Type -> Type])

type Prims (RunMC m)

Defined in Control.Effect.Embed

type Prims (RunMC m) = ([] :: [Effect])

type StM (RunMC m) a

Defined in Control.Effect.Embed

type StM (RunMC m) a = StM m a

type EmbedToMonadBaseC b = InterpretC EmbedToMonadBaseH (Embed b)

type EmbedToMonadIOC = InterpretC EmbedToMonadIOH (Embed IO)