---------------------------------------------------------------------- -- | -- Module : CheckGrammar -- Maintainer : AR -- Stability : (stable) -- Portability : (portable) -- -- > CVS $Date: 2005/11/11 23:24:33 $ -- > CVS $Author: aarne $ -- > CVS $Revision: 1.31 $ -- -- AR 4\/12\/1999 -- 1\/4\/2000 -- 8\/9\/2001 -- 15\/5\/2002 -- 27\/11\/2002 -- 18\/6\/2003 -- -- type checking also does the following modifications: -- -- - types of operations and local constants are inferred and put in place -- -- - both these types and linearization types are computed -- -- - tables are type-annotated ----------------------------------------------------------------------------- module GF.Compile.CheckGrammar(checkModule) where import GF.Infra.Ident import GF.Infra.Option import GF.Compile.TypeCheck.Abstract import GF.Compile.TypeCheck.Concrete import qualified GF.Compile.TypeCheck.ConcreteNew as CN import qualified GF.Compile.Compute.ConcreteNew as CN import GF.Grammar import GF.Grammar.Lexer import GF.Grammar.Lookup import GF.Grammar.Predef import GF.Grammar.PatternMatch import GF.Data.Operations import GF.Infra.CheckM import Data.List import qualified Data.Set as Set import Control.Monad import Text.PrettyPrint -- | checking is performed in the dependency order of modules checkModule :: Options -> SourceGrammar -> SourceModule -> Check SourceModule checkModule opts sgr mo@(m,mi) = do checkRestrictedInheritance sgr mo mo <- case mtype mi of MTConcrete a -> do let gr = prependModule sgr mo abs <- checkErr $ lookupModule gr a checkCompleteGrammar gr (a,abs) mo _ -> return mo infoss <- checkErr $ topoSortJments2 mo foldM updateCheckInfos mo infoss where updateCheckInfos mo = fmap (foldl update mo) . parallelCheck . map check where check (i,info) = fmap ((,) i) (checkInfo opts sgr mo i info) update mo@(m,mi) (i,info) = (m,mi{jments=updateTree (i,info) (jments mi)}) -- check if restricted inheritance modules are still coherent -- i.e. that the defs of remaining names don't depend on omitted names checkRestrictedInheritance :: SourceGrammar -> SourceModule -> Check () checkRestrictedInheritance sgr (name,mo) = checkIn (ppLocation (msrc mo) NoLoc <> colon) $ do let irs = [ii | ii@(_,mi) <- mextend mo, mi /= MIAll] -- names with restr. inh. let mrs = [((i,m),mi) | (i,m) <- mos, Just mi <- [lookup i irs]] -- the restr. modules themself, with restr. infos mapM_ checkRem mrs where mos = modules sgr checkRem ((i,m),mi) = do let (incl,excl) = partition (isInherited mi) (map fst (tree2list (jments m))) let incld c = Set.member c (Set.fromList incl) let illegal c = Set.member c (Set.fromList excl) let illegals = [(f,is) | (f,cs) <- allDeps, incld f, let is = filter illegal cs, not (null is)] case illegals of [] -> return () cs -> checkWarn (text "In inherited module" <+> ppIdent i <> text ", dependence of excluded constants:" $$ nest 2 (vcat [ppIdent f <+> text "on" <+> fsep (map ppIdent is) | (f,is) <- cs])) allDeps = concatMap (allDependencies (const True) . jments . snd) mos checkCompleteGrammar :: SourceGrammar -> SourceModule -> SourceModule -> Check SourceModule checkCompleteGrammar gr (am,abs) (cm,cnc) = checkIn (ppLocation (msrc cnc) NoLoc <> colon) $ do let jsa = jments abs let jsc = jments cnc -- check that all concrete constants are in abstract; build types for all lin jsc <- foldM checkCnc emptyBinTree (tree2list jsc) -- check that all abstract constants are in concrete; build default lin and lincats jsc <- foldM checkAbs jsc (tree2list jsa) return (cm,cnc{jments=jsc}) where checkAbs js i@(c,info) = case info of AbsFun (Just (L loc ty)) _ _ _ -> do let mb_def = do let (cxt,(_,i),_) = typeForm ty info <- lookupIdent i js info <- case info of (AnyInd _ m) -> do (m,info) <- lookupOrigInfo gr (m,i) return info _ -> return info case info of CncCat (Just (L loc (RecType []))) _ _ _ -> return (foldr (\_ -> Abs Explicit identW) (R []) cxt) _ -> Bad "no def lin" case lookupIdent c js of Ok (AnyInd _ _) -> return js Ok (CncFun ty (Just def) mn mf) -> return $ updateTree (c,CncFun ty (Just def) mn mf) js Ok (CncFun ty Nothing mn mf) -> case mb_def of Ok def -> return $ updateTree (c,CncFun ty (Just (L NoLoc def)) mn mf) js Bad _ -> do checkWarn (text "no linearization of" <+> ppIdent c) return js _ -> do case mb_def of Ok def -> do (cont,val) <- linTypeOfType gr cm ty let linty = (snd (valCat ty),cont,val) return $ updateTree (c,CncFun (Just linty) (Just (L NoLoc def)) Nothing Nothing) js Bad _ -> do checkWarn (text "no linearization of" <+> ppIdent c) return js AbsCat (Just _) -> case lookupIdent c js of Ok (AnyInd _ _) -> return js Ok (CncCat (Just _) _ _ _) -> return js Ok (CncCat Nothing mt mp mpmcfg) -> do checkWarn (text "no linearization type for" <+> ppIdent c <> text ", inserting default {s : Str}") return $ updateTree (c,CncCat (Just (L NoLoc defLinType)) mt mp mpmcfg) js _ -> do checkWarn (text "no linearization type for" <+> ppIdent c <> text ", inserting default {s : Str}") return $ updateTree (c,CncCat (Just (L NoLoc defLinType)) Nothing Nothing Nothing) js _ -> return js checkCnc js i@(c,info) = case info of CncFun _ d mn mf -> case lookupOrigInfo gr (am,c) of Ok (_,AbsFun (Just (L _ ty)) _ _ _) -> do (cont,val) <- linTypeOfType gr cm ty let linty = (snd (valCat ty),cont,val) return $ updateTree (c,CncFun (Just linty) d mn mf) js _ -> do checkWarn (text "function" <+> ppIdent c <+> text "is not in abstract") return js CncCat _ _ _ _ -> case lookupOrigInfo gr (am,c) of Ok _ -> return $ updateTree i js _ -> do checkWarn (text "category" <+> ppIdent c <+> text "is not in abstract") return js _ -> return $ updateTree i js -- | General Principle: only Just-values are checked. -- A May-value has always been checked in its origin module. checkInfo :: Options -> SourceGrammar -> SourceModule -> Ident -> Info -> Check Info checkInfo opts sgr (m,mo) c info = do checkIn (ppLocation (msrc mo) NoLoc <> colon) $ checkReservedId c case info of AbsCat (Just (L loc cont)) -> mkCheck loc "the category" $ checkContext gr cont AbsFun (Just (L loc typ0)) ma md moper -> do typ <- compAbsTyp [] typ0 -- to calculate let definitions mkCheck loc "the type of function" $ checkTyp gr typ case md of Just eqs -> mapM_ (\(L loc eq) -> mkCheck loc "the definition of function" $ checkDef gr (m,c) typ eq) eqs Nothing -> return () return (AbsFun (Just (L loc typ)) ma md moper) CncCat mty mdef mpr mpmcfg -> do mty <- case mty of Just (L loc typ) -> chIn loc "linearization type of" $ (if False --flag optNewComp opts then do (typ,_) <- CN.checkLType gr typ typeType typ <- computeLType gr [] typ return (Just (L loc typ)) else do (typ,_) <- checkLType gr [] typ typeType typ <- computeLType gr [] typ return (Just (L loc typ))) Nothing -> return Nothing mdef <- case (mty,mdef) of (Just (L _ typ),Just (L loc def)) -> chIn loc "default linearization of" $ do (def,_) <- checkLType gr [] def (mkFunType [typeStr] typ) return (Just (L loc def)) _ -> return Nothing mpr <- case mpr of (Just (L loc t)) -> chIn loc "print name of" $ do (t,_) <- checkLType gr [] t typeStr return (Just (L loc t)) _ -> return Nothing return (CncCat mty mdef mpr mpmcfg) CncFun mty mt mpr mpmcfg -> do mt <- case (mty,mt) of (Just (cat,cont,val),Just (L loc trm)) -> chIn loc "linearization of" $ do (trm,_) <- checkLType gr [] trm (mkFunType (map (\(_,_,ty) -> ty) cont) val) -- erases arg vars return (Just (L loc trm)) _ -> return mt mpr <- case mpr of (Just (L loc t)) -> chIn loc "print name of" $ do (t,_) <- checkLType gr [] t typeStr return (Just (L loc t)) _ -> return Nothing return (CncFun mty mt mpr mpmcfg) ResOper pty pde -> do (pty', pde') <- case (pty,pde) of (Just (L loct ty), Just (L locd de)) -> do ty' <- chIn loct "operation" $ (if False --flag optNewComp opts then CN.checkLType gr ty typeType >>= return . CN.normalForm (CN.resourceValues gr) (L loct c) . fst -- !! else checkLType gr [] ty typeType >>= computeLType gr [] . fst) (de',_) <- chIn locd "operation" $ (if False -- flag optNewComp opts then CN.checkLType gr de ty' else checkLType gr [] de ty') return (Just (L loct ty'), Just (L locd de')) (Nothing , Just (L locd de)) -> do (de',ty') <- chIn locd "operation" $ (if False -- flag optNewComp opts then CN.inferLType gr de else inferLType gr [] de) return (Just (L locd ty'), Just (L locd de')) (Just (L loct ty), Nothing) -> do chIn loct "operation" $ checkError (text "No definition given to the operation") return (ResOper pty' pde') ResOverload os tysts -> chIn NoLoc "overloading" $ do tysts' <- mapM (uncurry $ flip (\(L loc1 t) (L loc2 ty) -> checkLType gr [] t ty >>= \(t,ty) -> return (L loc1 t, L loc2 ty))) tysts -- return explicit ones tysts0 <- checkErr $ lookupOverload gr (m,c) -- check against inherited ones too tysts1 <- mapM (uncurry $ flip (checkLType gr [])) [(mkFunType args val,tr) | (args,(val,tr)) <- tysts0] --- this can only be a partial guarantee, since matching --- with value type is only possible if expected type is given checkUniq $ sort [let (xs,t) = typeFormCnc x in t : map (\(b,x,t) -> t) xs | (_,x) <- tysts1] return (ResOverload os [(y,x) | (x,y) <- tysts']) ResParam (Just (L loc pcs)) _ -> do ts <- chIn loc "parameter type" $ liftM concat $ mapM mkPar pcs return (ResParam (Just (L loc pcs)) (Just ts)) _ -> return info where gr = prependModule sgr (m,mo) chIn loc cat = checkIn (ppLocation (msrc mo) loc <> colon $$ nest 2 (text "Happened in" <+> text cat <+> ppIdent c)) mkPar (f,co) = do vs <- checkErr $ liftM combinations $ mapM (\(_,_,ty) -> allParamValues gr ty) co return $ map (mkApp (QC (m,f))) vs checkUniq xss = case xss of x:y:xs | x == y -> checkError $ text "ambiguous for type" <+> ppType (mkFunType (tail x) (head x)) | otherwise -> checkUniq $ y:xs _ -> return () mkCheck loc cat ss = case ss of [] -> return info _ -> checkError (ppLocation (msrc mo) loc <> colon $$ nest 2 (text "Happened in" <+> text cat <+> ppIdent c $$ nest 2 (vcat ss))) compAbsTyp g t = case t of Vr x -> maybe (checkError (text "no value given to variable" <+> ppIdent x)) return $ lookup x g Let (x,(_,a)) b -> do a' <- compAbsTyp g a compAbsTyp ((x, a'):g) b Prod b x a t -> do a' <- compAbsTyp g a t' <- compAbsTyp ((x,Vr x):g) t return $ Prod b x a' t' Abs _ _ _ -> return t _ -> composOp (compAbsTyp g) t -- | for grammars obtained otherwise than by parsing ---- update!! checkReservedId :: Ident -> Check () checkReservedId x | isReservedWord (ident2bs x) = checkWarn (text "reserved word used as identifier:" <+> ppIdent x) | otherwise = return () -- auxiliaries -- | linearization types and defaults linTypeOfType :: SourceGrammar -> Ident -> Type -> Check (Context,Type) linTypeOfType cnc m typ = do let (cont,cat) = typeSkeleton typ val <- lookLin cat args <- mapM mkLinArg (zip [0..] cont) return (args, val) where mkLinArg (i,(n,mc@(m,cat))) = do val <- lookLin mc let vars = mkRecType varLabel $ replicate n typeStr symb = argIdent n cat i rec <- if n==0 then return val else checkErr $ errIn (render (text "extending" $$ nest 2 (ppTerm Unqualified 0 vars) $$ text "with" $$ nest 2 (ppTerm Unqualified 0 val))) $ plusRecType vars val return (Explicit,symb,rec) lookLin (_,c) = checks [ --- rather: update with defLinType ? checkErr (lookupLincat cnc m c) >>= computeLType cnc [] ,return defLinType ]