comonad-4.2.7.2: 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 Source

Minimal complete definition

pos, peek

Methods

pos :: w a -> s Source

peek :: s -> w a -> a Source

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

seek :: s -> w a -> w a Source

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

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

Instances

ComonadStore s w => ComonadStore s (IdentityT w) Source |
(ComonadStore s w, Monoid m) => ComonadStore s (TracedT m w) Source |
ComonadStore s w => ComonadStore s (EnvT e w) Source |
Comonad w => ComonadStore s (StoreT s w) Source |

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

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