{-# LANGUAGE MultiParamTypeClasses, FunctionalDependencies #-}

{- |

Module : $Header$

Copyright : (c) Klaus Hartke, Uni Bremen 2008

License : GPLv2 or higher, see LICENSE.txt

Maintainer : Christian.Maeder@dfki.de

Stability : experimental

Portability : non-portable (MPTC-FD)

-}

module Kripke where

import Data.Set as Set

{- ----------------------------------------------------------------------------

Kripke Structure

---------------------------------------------------------------------------- -}

class Kripke k a s | k -> a s where

states :: k -> Set s

initial :: k -> Set s

next :: k -> s -> Set s

labels :: k -> s -> Set a

-- ----------------------------------------------------------------------------