{- |

Module : $Header$

Copyright : (c) Christian Maeder, Uni Bremen 2004-2005

License : GPLv2 or higher, see LICENSE.txt

Maintainer : luecke@informatik.uni-bremen.de

Stability : provisional

Portability : portable

static analysis of modal logic parts

-}

module Modal.StatAna (basicModalAnalysis, minExpForm) where

import Modal.AS_Modal

import Modal.Print_AS ()

import Modal.ModalSign

import CASL.Sign

import CASL.MixfixParser

import CASL.StaticAna

import CASL.AS_Basic_CASL

import CASL.ShowMixfix

import CASL.Overload

import CASL.Quantification

import Common.AS_Annotation

import Common.GlobalAnnotations

import Common.Keywords

import Common.Lib.State

import Common.Id

import Common.Result

import Common.ExtSign

import qualified Common.Lib.MapSet as MapSet

import qualified Data.Map as Map

import qualified Data.Set as Set

import Data.List as List

instance TermExtension M_FORMULA where

freeVarsOfExt sign (BoxOrDiamond _ _ f _) = freeVars sign f

basicModalAnalysis

:: (BASIC_SPEC M_BASIC_ITEM M_SIG_ITEM M_FORMULA,

Sign M_FORMULA ModalSign, GlobalAnnos)

-> Result (BASIC_SPEC M_BASIC_ITEM M_SIG_ITEM M_FORMULA,

ExtSign (Sign M_FORMULA ModalSign) Symbol,

[Named (FORMULA M_FORMULA)])

basicModalAnalysis =

basicAnalysis minExpForm ana_M_BASIC_ITEM ana_M_SIG_ITEM ana_Mix

ana_Mix :: Mix M_BASIC_ITEM M_SIG_ITEM M_FORMULA ModalSign

ana_Mix = emptyMix

{ getSigIds = ids_M_SIG_ITEM

, putParen = mapM_FORMULA

, mixResolve = resolveM_FORMULA

}

-- rigid ops will also be part of the CASL signature

ids_M_SIG_ITEM :: M_SIG_ITEM -> IdSets

ids_M_SIG_ITEM si = let e = Set.empty in case si of

Rigid_op_items _ al _ ->

(unite2 $ map (ids_OP_ITEM . item) al, e)

Rigid_pred_items _ al _ ->

((e, e), Set.unions $ map (ids_PRED_ITEM . item) al)

mapMODALITY :: MODALITY -> MODALITY

mapMODALITY m = case m of

Term_mod t -> Term_mod $ mapTerm mapM_FORMULA t

_ -> m

mapM_FORMULA :: M_FORMULA -> M_FORMULA

mapM_FORMULA (BoxOrDiamond b m f ps) =

BoxOrDiamond b (mapMODALITY m) (mapFormula mapM_FORMULA f) ps

resolveMODALITY :: MixResolve MODALITY

resolveMODALITY ga ids m = case m of

Term_mod t -> fmap Term_mod $ resolveMixTrm mapM_FORMULA

resolveM_FORMULA ga ids t

_ -> return m

resolveM_FORMULA :: MixResolve M_FORMULA

resolveM_FORMULA ga ids cf = case cf of

BoxOrDiamond b m f ps -> do

nm <- resolveMODALITY ga ids m

nf <- resolveMixFrm mapM_FORMULA resolveM_FORMULA ga ids f

return $ BoxOrDiamond b nm nf ps

minExpForm :: Min M_FORMULA ModalSign

minExpForm s form =

let minMod md ps = case md of

Simple_mod i -> minMod (Term_mod (Mixfix_token i)) ps

Term_mod t -> let

r = do

t2 <- oneExpTerm minExpForm s t

let srt = sortOfTerm t2

trm = Term_mod t2

supers = supersortsOf srt s

if Set.null $ Set.intersection

(Set.insert srt supers)

$ Map.keysSet $ termModies $ extendedInfo s

then Result [mkDiag Error

("unknown term modality sort '"

++ showId srt "' for term") t ]

$ Just trm

else return trm

in case t of

Mixfix_token tm ->

if Map.member tm (modies $ extendedInfo s)

|| tokStr tm == emptyS

then return $ Simple_mod tm

else Result

[mkDiag Error "unknown modality" tm]

$ Just $ Simple_mod tm

Application (Op_name (Id [tm] [] _)) [] _ ->

if Map.member tm (modies $ extendedInfo s)

then return $ Simple_mod tm

else r

_ -> r

in case form of

BoxOrDiamond b m f ps ->

do nm <- minMod m ps

f2 <- minExpFORMULA minExpForm s f

return $ BoxOrDiamond b nm f2 ps

ana_M_SIG_ITEM :: Ana M_SIG_ITEM M_BASIC_ITEM M_SIG_ITEM M_FORMULA ModalSign

ana_M_SIG_ITEM mix mi =

case mi of

Rigid_op_items r al ps ->

do ul <- mapM (ana_OP_ITEM minExpForm mix) al

case r of

Flexible -> mapM_ (\ aoi -> case item aoi of

Op_decl ops ty _ _ ->

mapM_ (updateExtInfo . addFlexOp (toOpType ty)) ops

Op_defn i par _ _ -> maybe (return ())

(\ ty -> updateExtInfo $ addFlexOp (toOpType ty) i)

$ headToType par) ul

Rigid -> return ()

return $ Rigid_op_items r ul ps

Rigid_pred_items r al ps ->

do ul <- mapM (ana_PRED_ITEM minExpForm mix) al

case r of

Flexible -> mapM_ (\ aoi -> case item aoi of

Pred_decl ops ty _ ->

mapM_ (updateExtInfo . addFlexPred (toPredType ty)) ops

Pred_defn i (Pred_head args _) _ _ ->

updateExtInfo $ addFlexPred

(PredType $ sortsOfArgs args) i ) ul

Rigid -> return ()

return $ Rigid_pred_items r ul ps

addFlexOp :: OpType -> Id -> ModalSign -> Result ModalSign

addFlexOp ty i m = return

m { flexOps = addOpTo i ty $ flexOps m }

addFlexPred :: PredType -> Id -> ModalSign -> Result ModalSign

addFlexPred ty i m = return

m { flexPreds = MapSet.insert i ty $ flexPreds m }

ana_M_BASIC_ITEM

:: Ana M_BASIC_ITEM M_BASIC_ITEM M_SIG_ITEM M_FORMULA ModalSign

ana_M_BASIC_ITEM mix bi = case bi of

Simple_mod_decl al fs ps -> do

mapM_ ((updateExtInfo . preAddModId) . item) al

newFs <- mapAnM (ana_FORMULA mix) fs

resFs <- mapAnM (return . fst) newFs

anaFs <- mapAnM (return . snd) newFs

mapM_ ((updateExtInfo . addModId anaFs) . item) al

return $ Simple_mod_decl al resFs ps

Term_mod_decl al fs ps -> do

e <- get

mapM_ ((updateExtInfo . preAddModSort e) . item) al

newFs <- mapAnM (ana_FORMULA mix) fs

resFs <- mapAnM (return . fst) newFs

anaFs <- mapAnM (return . snd) newFs

mapM_ ((updateExtInfo . addModSort anaFs) . item) al

return $ Term_mod_decl al resFs ps

preAddModId :: SIMPLE_ID -> ModalSign -> Result ModalSign

preAddModId i m =

let ms = modies m in

if Map.member i ms then

Result [mkDiag Hint "repeated modality" i] $ Just m

else return m { modies = Map.insert i [] ms }

addModId :: [AnModFORM] -> SIMPLE_ID -> ModalSign -> Result ModalSign

addModId frms i m = return m

{ modies = Map.insertWith List.union i frms $ modies m }

preAddModSort :: Sign M_FORMULA ModalSign -> SORT -> ModalSign

-> Result ModalSign

preAddModSort e i m =

let ms = termModies m

ds = hasSort e i

in if Map.member i ms || not (null ds) then

Result (mkDiag Hint "repeated term modality" i : ds) $ Just m

else return m { termModies = Map.insert i [] ms }

addModSort :: [AnModFORM] -> SORT -> ModalSign -> Result ModalSign

addModSort frms i m = return m

{ termModies = Map.insertWith List.union i frms $ termModies m }

ana_FORMULA :: Mix M_BASIC_ITEM M_SIG_ITEM M_FORMULA ModalSign

-> FORMULA M_FORMULA -> State (Sign M_FORMULA ModalSign)

(FORMULA M_FORMULA, FORMULA M_FORMULA)

ana_FORMULA mix f = do

let ps = map (mkId . (: [])) $ Set.toList $ getFormPredToks f

pm <- gets predMap

mapM_ (addPred (emptyAnno ()) $ PredType []) ps

newGa <- gets globAnnos

let Result es m = resolveFormula mapM_FORMULA

resolveM_FORMULA newGa (mixRules mix) f

addDiags es

e <- get

phi <- case m of

Nothing -> return (f, f)

Just r -> do

n <- resultToState (minExpFORMULA minExpForm e) r

return (r, n)

e2 <- get

put e2 {predMap = pm}

return phi

getFormPredToks :: FORMULA M_FORMULA -> Set.Set Token

getFormPredToks frm = case frm of

Quantification _ _ f _ -> getFormPredToks f

Conjunction fs _ -> Set.unions $ map getFormPredToks fs

Disjunction fs _ -> Set.unions $ map getFormPredToks fs

Implication f1 f2 _ _ ->

Set.union (getFormPredToks f1) $ getFormPredToks f2

Equivalence f1 f2 _ ->

Set.union (getFormPredToks f1) $ getFormPredToks f2

Negation f _ -> getFormPredToks f

Mixfix_formula (Mixfix_token t) -> Set.singleton t

Mixfix_formula t -> getTermPredToks t

ExtFORMULA (BoxOrDiamond _ _ f _) -> getFormPredToks f

Predication _ ts _ -> Set.unions $ map getTermPredToks ts

Definedness t _ -> getTermPredToks t

Existl_equation t1 t2 _ ->

Set.union (getTermPredToks t1) $ getTermPredToks t2

Strong_equation t1 t2 _ ->

Set.union (getTermPredToks t1) $ getTermPredToks t2

Membership t _ _ -> getTermPredToks t

_ -> Set.empty

getTermPredToks :: TERM M_FORMULA -> Set.Set Token

getTermPredToks trm = case trm of

Application _ ts _ -> Set.unions $ map getTermPredToks ts

Sorted_term t _ _ -> getTermPredToks t

Cast t _ _ -> getTermPredToks t

Conditional t1 f t2 _ -> Set.union (getTermPredToks t1) $

Set.union (getFormPredToks f) $ getTermPredToks t2

Mixfix_term ts -> Set.unions $ map getTermPredToks ts

Mixfix_parenthesized ts _ -> Set.unions $ map getTermPredToks ts

Mixfix_bracketed ts _ -> Set.unions $ map getTermPredToks ts

Mixfix_braced ts _ -> Set.unions $ map getTermPredToks ts

_ -> Set.empty