{- |

Module : $Header$

Copyright : (c) Christian Maeder and Uni Bremen 2003-2005

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

Maintainer : maeder@tzi.de

Stability : experimental

Portability : portable

analyse operation declarations

-}

module HasCASL.OpDecl where

import Data.Maybe

import Common.Id

import Common.AS_Annotation

import Common.Lib.State

import Common.Result

import Common.GlobalAnnotations

import HasCASL.As

import HasCASL.TypeAna

import HasCASL.VarDecl

import HasCASL.Le

import HasCASL.Builtin

import HasCASL.AsUtils

import HasCASL.TypeCheck

import HasCASL.ProgEq

anaAttr :: GlobalAnnos -> TypeScheme -> OpAttr -> State Env (Maybe OpAttr)

anaAttr ga (TypeScheme tvs ty _) (UnitOpAttr trm ps) =

do e <- get

let mTy = let (fty, fArgs) = getTypeAppl ty in case fArgs of

[arg, t3] | lesserType e fty (toType $ arrowId PFunArr)

-> let (pty, ts) = getTypeAppl arg in case ts of

[t1, t2] | lesserType e pty (toType $ productId 2)

-> Just (t1,t2,t3)

_ -> Nothing

_ -> Nothing

let tm = typeMap e

mapM_ (addTypeVarDecl False) tvs

case mTy of

Nothing -> do addDiags [mkDiag Error

"unexpected type of operation" ty]

mt <- resolveTerm ga Nothing trm

putTypeMap tm

case mt of

Nothing -> return Nothing

Just t -> return $ Just $ UnitOpAttr t ps

Just (t1, t2, t3) ->

do if t1 == t2 && t2 == t3 then

return ()

else addDiags [mkDiag Error

"unexpected type components of operation" ty]

mt <- resolveTerm ga (Just t3) trm

putTypeMap tm

case mt of Nothing -> return Nothing

Just t -> return $ Just $ UnitOpAttr t ps

anaAttr _ _ b = return $ Just b

tuplePatternToType :: [VarDecl] -> Type

tuplePatternToType vds = mkProductType (map ( \ (VarDecl _ t _ _) -> t) vds)

getUninstOpId :: TypeScheme -> OpId -> (OpId, TypeScheme)

getUninstOpId (TypeScheme tvs q ps) (OpId i args qs) =

(OpId i [] qs, TypeScheme (args ++ tvs) q ps)

anaOpId :: GlobalAnnos -> OpBrand -> TypeScheme -> [OpAttr] -> OpId

-> State Env Bool

anaOpId ga br partSc attrs o =

do let (OpId i _ _, sc) = getUninstOpId partSc o

mSc <- anaTypeScheme sc

case mSc of

Nothing -> return False

Just newSc -> do

mAttrs <- mapM (anaAttr ga newSc) attrs

addOpId i newSc (catMaybes mAttrs) $ NoOpDefn br

anaOpItem :: GlobalAnnos -> OpBrand -> OpItem -> State Env (Maybe OpItem)

anaOpItem ga br (OpDecl is sc attr ps) = do

bs <- mapM (anaOpId ga br sc attr) is

let us = map fst $ filter snd $ zip is bs

return $ if null us then Nothing else

Just $ OpDecl us sc attr ps

anaOpItem ga br (OpDefn o oldPats sc partial trm ps) =

do let (op@(OpId i _ _), TypeScheme tArgs scTy qs) =

getUninstOpId sc o

checkUniqueVars $ concat oldPats

tvs <- gets localTypeVars

mArgs <- mapM anaddTypeVarDecl tArgs

mPats <- mapM (mapM anaVarDecl) oldPats

let newPats = map catMaybes mPats

monoPats = map (map makeMonomorph) newPats

pats = map (\ l -> mkTupleTerm (map QualVar l) nullRange) monoPats

vs <- gets localVars

mapM (mapM $ addLocalVar True) monoPats

let newArgs = catMaybes mArgs

mty <- anaStarType scTy

case mty of

Just ty -> do

mt <- resolveTerm ga Nothing $ TypedTerm trm AsType ty ps

newSc <- generalizeS $ TypeScheme newArgs

(getFunType ty partial

$ map tuplePatternToType newPats) qs

putLocalVars vs

putLocalTypeVars tvs

case mt of

Just lastTrm -> do

let lamTrm = case (pats, partial) of

([], Total) -> lastTrm

_ -> LambdaTerm pats partial lastTrm ps

ot = QualOp br (InstOpId i [] nullRange) newSc nullRange

lhs = mkApplTerm ot pats

ef = mkEqTerm eqId ps lhs lastTrm

f = mkForall (map GenTypeVarDecl newArgs

++ (map GenVarDecl $

concatMap extractVars pats)) ef

addOpId i newSc [] $ Definition br lamTrm

appendSentences [NamedSen

("def_" ++ showId i "")

True False $ Formula f]

return $ Just $ OpDefn op [] newSc Total lamTrm ps

Nothing -> do

addOpId i newSc [] $ NoOpDefn br

return $ Just $ OpDecl [OpId i [] ps] newSc [] ps

Nothing -> do

resolveTerm ga Nothing trm -- get a view more diags

putLocalVars vs

putLocalTypeVars tvs

return Nothing

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

-- ProgEq

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

anaProgEq :: GlobalAnnos -> ProgEq -> State Env (Maybe ProgEq)

anaProgEq ga pe@(ProgEq _ _ q) =

do mp <- resolveTerm ga Nothing (LetTerm Program [pe]

(BracketTerm Parens [] q) q)

case mp of

Just (LetTerm _ (newPrg@(ProgEq newPat _ _) : _) _ _) ->

case getAppl newPat of

Just (i, sc, _) -> do

addOpId i sc [] $ NoOpDefn Op

appendSentences [NamedSen ("pe_" ++ showId i "")

True True $ ProgEqSen i sc newPrg]

e <- get

if isLHS e newPat then return ()

else addDiags [mkDiag Warning

"illegal lhs pattern"

newPat]

return $ Just newPrg

Nothing -> do addDiags [mkDiag Error

"illegal toplevel pattern"

newPat]

return Nothing

_ -> return Nothing

getApplConstr :: Pattern -> (Pattern, [Pattern])

getApplConstr pat =

case pat of

ApplTerm p1 p2 _ ->

let (tp, args) = getApplConstr p1 in (tp, p2:args)

TypedTerm tp _ _ _ -> getApplConstr tp

_ -> (pat, [])