comonad-5: Comonads

Copyright | (C) 2008-2012 Edward Kmett
License | BSD-style (see the file LICENSE)
Maintainer | Edward Kmett <ekmett@gmail.com>
Stability | experimental
Portability | non-portable (fundeps, MPTCs)
Safe Haskell | Safe
Language | Haskell2010

Control.Comonad.Store.Class

Description

# Documentation

class Comonad w => ComonadStore s w | w -> s where #

Minimal complete definition

pos, peek

Methods

pos :: w a -> s #

peek :: s -> w a -> a #

peeks :: (s -> s) -> w a -> a #

seek :: s -> w a -> w a #

seeks :: (s -> s) -> w a -> w a #

experiment :: Functor f => (s -> f s) -> w a -> f a #

Instances

(ComonadStore s w, Monoid m) => ComonadStore s (TracedT m w) # |
Methods pos :: TracedT m w a -> s # peek :: s -> TracedT m w a -> a # peeks :: (s -> s) -> TracedT m w a -> a # seek :: s -> TracedT m w a -> TracedT m w a # seeks :: (s -> s) -> TracedT m w a -> TracedT m w a # experiment :: Functor f => (s -> f s) -> TracedT m w a -> f a #
ComonadStore s w => ComonadStore s (EnvT e w) # |
Methods pos :: EnvT e w a -> s # peek :: s -> EnvT e w a -> a # peeks :: (s -> s) -> EnvT e w a -> a # seek :: s -> EnvT e w a -> EnvT e w a # seeks :: (s -> s) -> EnvT e w a -> EnvT e w a # experiment :: Functor f => (s -> f s) -> EnvT e w a -> f a #
ComonadStore s w => ComonadStore s (IdentityT * w) # |
Methods pos :: IdentityT * w a -> s # peek :: s -> IdentityT * w a -> a # peeks :: (s -> s) -> IdentityT * w a -> a # seek :: s -> IdentityT * w a -> IdentityT * w a # seeks :: (s -> s) -> IdentityT * w a -> IdentityT * w a # experiment :: Functor f => (s -> f s) -> IdentityT * w a -> f a #
Comonad w => ComonadStore s (StoreT s w) # |
Methods pos :: StoreT s w a -> s # peek :: s -> StoreT s w a -> a # peeks :: (s -> s) -> StoreT s w a -> a # seek :: s -> StoreT s w a -> StoreT s w a # seeks :: (s -> s) -> StoreT s w a -> StoreT s w a # experiment :: Functor f => (s -> f s) -> StoreT s w a -> f a #

lowerPos :: (ComonadTrans t, ComonadStore s w) => t w a -> s #

lowerPeek :: (ComonadTrans t, ComonadStore s w) => s -> t w a -> a #