{- |

Module : $Header$

Copyright : (c) Markus Roggenbach and Till Mossakowski and Uni Bremen 2004

License : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.txt

Maintainer : M.Roggenbach@swansea.ac.uk

Stability : provisional

Portability : portable

signatures for CSP-CASL

-}

{- todo: implement isInclusion, computeExt

-}

module CspCASL.SignCSP where

import CASL.AS_Basic_CASL

import CASL.Sign

import CASL.Morphism

import Common.Id

import qualified Common.Lib.Map as Map

import qualified Common.Lib.Set as Set

import Common.Lib.Pretty

import Common.PrettyPrint

import Common.PrintLaTeX

data CSPAddSign = CSPAddSign { channelNames :: Map.Map Id SORT

, processNames :: Map.Map Id (Maybe SORT)}

deriving (Eq, Show)

type CSPSign = Sign () CSPAddSign

emptyCSPAddSign :: CSPAddSign

emptyCSPAddSign = CSPAddSign { channelNames = Map.empty

, processNames = Map.empty

}

diffCSPAddSign :: CSPAddSign -> CSPAddSign -> CSPAddSign

diffCSPAddSign a b =

a { channelNames = channelNames a `Map.difference` channelNames b,

processNames = processNames a `Map.difference` processNames b

}

diffCSPSign :: CSPSign -> CSPSign -> CSPSign

diffCSPSign sig1 sig2 =

diffSig sig1 sig2

{ extendedInfo = extendedInfo sig1 `diffCSPAddSign` extendedInfo sig2 }

emptyCSPSign :: CSPSign

emptyCSPSign = emptySign emptyCSPAddSign

isInclusion :: CSPAddSign -> CSPAddSign -> Bool

isInclusion _ _ = True

data CSPAddMorphism =

CSPAddMorphism { channelMap :: Map.Map Id Id

, processMap :: Map.Map Id Id

}

deriving (Eq, Show)

type CSPMorphism = Morphism () CSPAddSign CSPAddMorphism

computeExt :: Ext () CSPAddSign CSPAddMorphism

computeExt _ _ =

CSPAddMorphism { channelMap = Map.empty -- ???

, processMap = Map.empty -- ???

}

-- dummy instances, need to be elaborated!

instance PrettyPrint CSPAddSign where

printText0 _ x = ptext $ show x

instance PrettyPrint CSPAddMorphism where

printText0 _ x = ptext $ show x

instance PrintLaTeX CSPAddSign where

printLatex0 _ x = ptext $ show x

instance PrintLaTeX CSPAddMorphism where

printLatex0 _ x = ptext $ show x