Control.Monad.Trans.Identity

newtypenewtype IdentityT (f :: k -> Type) (a :: k)

The trivial monad transformer, which maps a monad to an equivalent monad.

Constructors

IdentityT
- runIdentityT :: f a

Instances26Generic1, MonadTrans, Monad, Functor, MonadFix, MonadFail, …

Generic1 (IdentityT f)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
MonadTrans IdentityTDefined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Monad m => Monad (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Functor m => Functor (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
MonadFix m => MonadFix (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
MonadFail m => MonadFail (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Applicative m => Applicative (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Foldable f => Foldable (IdentityT f)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Traversable f => Traversable (IdentityT f)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Alternative m => Alternative (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
MonadPlus m => MonadPlus (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
MonadIO m => MonadIO (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
MonadZip m => MonadZip (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Foldable1 m => Foldable1 (IdentityT m)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Eq1 f => Eq1 (IdentityT f)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Ord1 f => Ord1 (IdentityT f)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Read1 f => Read1 (IdentityT f)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Show1 f => Show1 (IdentityT f)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Contravariant f => Contravariant (IdentityT f)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
(Eq1 f, Eq a) => Eq (IdentityT f a)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
(Ord1 f, Ord a) => Ord (IdentityT f a)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
(Read1 f, Read a) => Read (IdentityT f a)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
(Show1 f, Show a) => Show (IdentityT f a)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
Generic (IdentityT f a)Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
type Rep (IdentityT f a) = D1 ('MetaData "IdentityT" "Control.Monad.Trans.Identity" "transformers-0.6.3.0-34b4" 'True) (C1 ('MetaCons "IdentityT" 'PrefixI 'True) (S1 ('MetaSel ('Just "runIdentityT") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (f a))))Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity
type Rep1 (IdentityT f) = D1 ('MetaData "IdentityT" "Control.Monad.Trans.Identity" "transformers-0.6.3.0-34b4" 'True) (C1 ('MetaCons "IdentityT" 'PrefixI 'True) (S1 ('MetaSel ('Just "runIdentityT") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec1 f)))Defined in transformers-0.6.3.0 · Control.Monad.Trans.Identity

The identity monad transformer

Constructors

Lifting other operations