Trait MonadTrans
lifted::transformer
pub trait MonadTrans { pub fn lift<M: Monad, A>(a: K1<M, A>) -> K2<Self, M, A>; }
pub fn lift<M: Monad, A>(a: K1<M, A>) -> K2<Self, M, A>
impl MonadTrans for IdentityT
impl MonadTrans for OptionT