Copyright | (C) 2008-2013 Edward Kmett |
---|---|
License | BSD-style (see the file LICENSE) |
Maintainer | Edward Kmett <ekmett@gmail.com> |
Stability | provisional |
Portability | portable |
Safe Haskell | Safe |
Language | Haskell2010 |
Documentation
class ComonadHoist t where Source #
cohoist :: ( Comonad w, Comonad v) => ( forall x. w x -> v x) -> t w a -> t v a Source #
Given any comonad-homomorphism from
w
to
v
this yields a comonad
homomorphism from
t w
to
t v
.
Instances
ComonadHoist ( IdentityT :: ( Type -> Type ) -> Type -> Type ) Source # | |
ComonadHoist ( EnvT e) Source # | |
ComonadHoist ( StoreT s) Source # | |
ComonadHoist ( TracedT m) Source # | |