Copyright	(C) 2015 Edward Kmett
License	BSD-style (see the file LICENSE)
Maintainer	Edward Kmett <ekmett@gmail.com>
Stability	provisional
Portability	MPTCs, fundeps
Safe Haskell	Trustworthy
Language	Haskell2010

Data.Profunctor.Sieve

Description

Synopsis

class (Profunctor p, Functor f) => Sieve p f | p -> f where
- sieve :: p a b -> a -> f b
class (Profunctor p, Functor f) => Cosieve p f | p -> f where
- cosieve :: p a b -> f a -> b

Documentation

class (Profunctor p, Functor f) => Sieve p f | p -> f where Source #

A Profunctor p is a Sieve on f if it is a subprofunctor of Star f.

That is to say it is a subset of Hom(-,f=) closed under lmap and rmap.

Alternately, you can view it as a sieve in the comma category Hask/f.

Methods

sieve :: p a b -> a -> f b Source #

Instances

(Monad m, Functor m) => Sieve (Kleisli m) m Source #
Instance details Defined in Data.Profunctor.Sieve Methods sieve :: Kleisli m a b -> a -> m b Source #
Sieve ((->) :: Type -> Type -> Type) Identity Source #
Instance details Defined in Data.Profunctor.Sieve Methods sieve :: (a -> b) -> a -> Identity b Source #
Functor f => Sieve (Star f) f Source #
Instance details Defined in Data.Profunctor.Sieve Methods sieve :: Star f a b -> a -> f b Source #
Sieve (Forget r :: Type -> Type -> Type) (Const r :: Type -> Type) Source #
Instance details Defined in Data.Profunctor.Sieve Methods sieve :: Forget r a b -> a -> Const r b Source #
(Sieve p f, Sieve q g) => Sieve (Procompose p q) (Compose g f) Source #
Instance details Defined in Data.Profunctor.Composition Methods sieve :: Procompose p q a b -> a -> Compose g f b Source #

class (Profunctor p, Functor f) => Cosieve p f | p -> f where Source #

A Profunctor p is a Cosieve on f if it is a subprofunctor of Costar f.

That is to say it is a subset of Hom(f-,=) closed under lmap and rmap.

Alternately, you can view it as a cosieve in the comma category f/Hask.

Methods

cosieve :: p a b -> f a -> b Source #

Instances

Cosieve (Tagged :: Type -> Type -> Type) (Proxy :: Type -> Type) Source #
Instance details Defined in Data.Profunctor.Sieve Methods cosieve :: Tagged a b -> Proxy a -> b Source #
Cosieve ((->) :: Type -> Type -> Type) Identity Source #
Instance details Defined in Data.Profunctor.Sieve Methods cosieve :: (a -> b) -> Identity a -> b Source #
Functor w => Cosieve (Cokleisli w) w Source #
Instance details Defined in Data.Profunctor.Sieve Methods cosieve :: Cokleisli w a b -> w a -> b Source #
Functor f => Cosieve (Costar f) f Source #
Instance details Defined in Data.Profunctor.Sieve Methods cosieve :: Costar f a b -> f a -> b Source #
(Cosieve p f, Cosieve q g) => Cosieve (Procompose p q) (Compose f g) Source #
Instance details Defined in Data.Profunctor.Composition Methods cosieve :: Procompose p q a b -> Compose f g a -> b Source #