{-# LANGUAGE MultiParamTypeClasses, TypeSynonymInstances #-}

{- |

Module : $Header$

Description : embedding from CASL to CoCASL

Copyright : (c) Till Mossakowski and Uni Bremen 2004

License : GPLv2 or higher, see LICENSE.txt

Maintainer : till@informatik.uni-bremen.de

Stability : provisional

Portability : non-portable (imports Logic.Logic)

The embedding comorphism from CASL to CoCASL.

-}

module Comorphisms.CASL2CoCASL where

import Logic.Logic

import Logic.Comorphism

import qualified Data.Set as Set

import Common.ProofTree

-- CASL

import CASL.Logic_CASL

import CASL.Sublogic as SL

import CASL.Sign

import CASL.AS_Basic_CASL

import CASL.Morphism

import CASL.Fold

-- CoCASLCASL

import CoCASL.Logic_CoCASL

import CoCASL.AS_CoCASL

import CoCASL.CoCASLSign

import CoCASL.StatAna (CSign)

import CoCASL.Sublogic

-- | The identity of the comorphism

data CASL2CoCASL = CASL2CoCASL deriving (Show)

instance Language CASL2CoCASL -- default definition is okay

instance Comorphism CASL2CoCASL

CASL CASL_Sublogics

CASLBasicSpec CASLFORMULA SYMB_ITEMS SYMB_MAP_ITEMS

CASLSign

CASLMor

Symbol RawSymbol ProofTree

CoCASL CoCASL_Sublogics

C_BASIC_SPEC CoCASLFORMULA SYMB_ITEMS SYMB_MAP_ITEMS

CSign

CoCASLMor

Symbol RawSymbol () where

sourceLogic CASL2CoCASL = CASL

sourceSublogic CASL2CoCASL = SL.top

targetLogic CASL2CoCASL = CoCASL

mapSublogic CASL2CoCASL s = Just $ s { ext_features = False }

map_theory CASL2CoCASL = return . simpleTheoryMapping mapSig mapSen

map_morphism CASL2CoCASL = return . mapMor

map_sentence CASL2CoCASL _ = return . mapSen

map_symbol CASL2CoCASL _ = Set.singleton . mapSym

has_model_expansion CASL2CoCASL = True

is_weakly_amalgamable CASL2CoCASL = True

isInclusionComorphism CASL2CoCASL = True

mapSig :: CASLSign -> CSign

mapSig sign =

(emptySign emptyCoCASLSign) {sortSet = sortSet sign

, sortRel = sortRel sign

, opMap = opMap sign

, assocOps = assocOps sign

, predMap = predMap sign }

mapMor :: CASLMor -> CoCASLMor

mapMor m = (embedMorphism emptyMorExt (mapSig $ msource m) $ mapSig $ mtarget m)

{ sort_map = sort_map m

, op_map = op_map m

, pred_map = pred_map m }

mapSym :: Symbol -> Symbol

mapSym = id -- needs to be changed once CoCASL symbols are added

mapSen :: CASLFORMULA -> CoCASLFORMULA

mapSen = foldFormula $ mapRecord (const $ error "CASL2CoCASL.mapSen")