X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRnHsSyn.lhs;h=6ce037970f52f5aafae6939917607edc4fa0b237;hb=36436bc62a98f53e126ec02fe946337c4c766c3f;hp=496a518923ff314e7acf458d597eb1d1867246c2;hpb=0d8269cc016f7063365a9d335c6108703d3d1286;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnHsSyn.lhs b/ghc/compiler/rename/RnHsSyn.lhs index 496a518..6ce0379 100644 --- a/ghc/compiler/rename/RnHsSyn.lhs +++ b/ghc/compiler/rename/RnHsSyn.lhs @@ -4,53 +4,27 @@ \section[RnHsSyn]{Specialisations of the @HsSyn@ syntax for the renamer} \begin{code} -module RnHsSyn where +module RnHsSyn( + -- Names + charTyCon_name, listTyCon_name, parrTyCon_name, tupleTyCon_name, + extractHsTyVars, extractHsTyNames, extractHsTyNames_s, + extractFunDepNames, extractHsCtxtTyNames, extractHsPredTyNames, + + -- Free variables + hsSigsFVs, hsSigFVs, conDeclFVs, bangTyFVs, + + maybeGenericMatch + ) where #include "HsVersions.h" import HsSyn -import HsPragmas ( InstancePragmas, GenPragmas, DataPragmas, ClassPragmas, ClassOpPragmas ) - -import TysWiredIn ( tupleTyCon, unboxedTupleTyCon, - listTyCon, charTyCon ) -import Name ( Name, getName ) +import Class ( FunDep ) +import TysWiredIn ( tupleTyCon, listTyCon, parrTyCon, charTyCon ) +import Name ( Name, getName, isTyVarName ) import NameSet -import Util -import Outputable -\end{code} - - -\begin{code} -type RenamedArithSeqInfo = ArithSeqInfo Name RenamedPat -type RenamedClassOpSig = Sig Name -type RenamedConDecl = ConDecl Name -type RenamedContext = Context Name -type RenamedHsDecl = HsDecl Name RenamedPat -type RenamedRuleDecl = RuleDecl Name RenamedPat -type RenamedTyClDecl = TyClDecl Name RenamedPat -type RenamedSpecDataSig = SpecDataSig Name -type RenamedDefaultDecl = DefaultDecl Name -type RenamedForeignDecl = ForeignDecl Name -type RenamedGRHS = GRHS Name RenamedPat -type RenamedGRHSs = GRHSs Name RenamedPat -type RenamedHsBinds = HsBinds Name RenamedPat -type RenamedHsExpr = HsExpr Name RenamedPat -type RenamedHsModule = HsModule Name RenamedPat -type RenamedInstDecl = InstDecl Name RenamedPat -type RenamedMatch = Match Name RenamedPat -type RenamedMonoBinds = MonoBinds Name RenamedPat -type RenamedPat = InPat Name -type RenamedHsType = HsType Name -type RenamedRecordBinds = HsRecordBinds Name RenamedPat -type RenamedSig = Sig Name -type RenamedStmt = Stmt Name RenamedPat -type RenamedFixitySig = FixitySig Name - -type RenamedClassOpPragmas = ClassOpPragmas Name -type RenamedClassPragmas = ClassPragmas Name -type RenamedDataPragmas = DataPragmas Name -type RenamedGenPragmas = GenPragmas Name -type RenamedInstancePragmas = InstancePragmas Name +import BasicTypes ( Boxity ) +import SrcLoc ( Located(..), unLoc ) \end{code} %************************************************************************ @@ -62,38 +36,123 @@ type RenamedInstancePragmas = InstancePragmas Name These free-variable finders returns tycons and classes too. \begin{code} -charTyCon_name, listTyCon_name :: Name +charTyCon_name, listTyCon_name, parrTyCon_name :: Name charTyCon_name = getName charTyCon listTyCon_name = getName listTyCon +parrTyCon_name = getName parrTyCon + +tupleTyCon_name :: Boxity -> Int -> Name +tupleTyCon_name boxity n = getName (tupleTyCon boxity n) + +extractHsTyVars :: LHsType Name -> NameSet +extractHsTyVars x = filterNameSet isTyVarName (extractHsTyNames x) -tupleTyCon_name :: Bool -> Int -> Name -tupleTyCon_name True n = getName (tupleTyCon n) -tupleTyCon_name False n = getName (unboxedTupleTyCon n) +extractFunDepNames :: FunDep Name -> NameSet +extractFunDepNames (ns1, ns2) = mkNameSet ns1 `unionNameSets` mkNameSet ns2 -extractHsTyNames :: RenamedHsType -> NameSet +extractHsTyNames :: LHsType Name -> NameSet extractHsTyNames ty - = get ty + = getl ty where - get (MonoTyApp ty1 ty2) = get ty1 `unionNameSets` get ty2 - get (MonoListTy ty) = unitNameSet listTyCon_name - `unionNameSets` get ty - get (MonoTupleTy tys boxed) = unitNameSet (tupleTyCon_name boxed (length tys)) - `unionNameSets` extractHsTyNames_s tys - get (MonoFunTy ty1 ty2) = get ty1 `unionNameSets` get ty2 - get (MonoDictTy cls tys) = unitNameSet cls `unionNameSets` extractHsTyNames_s tys - get (MonoTyVar tv) = unitNameSet tv - get (HsForAllTy (Just tvs) - ctxt ty) = (extractHsCtxtTyNames ctxt `unionNameSets` get ty) + getl (L _ ty) = get ty + + get (HsAppTy ty1 ty2) = getl ty1 `unionNameSets` getl ty2 + get (HsListTy ty) = unitNameSet listTyCon_name `unionNameSets` getl ty + get (HsPArrTy ty) = unitNameSet parrTyCon_name `unionNameSets` getl ty + get (HsTupleTy con tys) = extractHsTyNames_s tys + get (HsFunTy ty1 ty2) = getl ty1 `unionNameSets` getl ty2 + get (HsPredTy p) = extractHsPredTyNames p + get (HsOpTy ty1 op ty2) = getl ty1 `unionNameSets` getl ty2 `unionNameSets` unitNameSet (unLoc op) + get (HsParTy ty) = getl ty + get (HsBangTy _ ty) = getl ty + get (HsNumTy n) = emptyNameSet + get (HsTyVar tv) = unitNameSet tv + get (HsSpliceTy _) = emptyNameSet -- Type splices mention no type variables + get (HsKindSig ty k) = getl ty + get (HsForAllTy _ tvs + ctxt ty) = (extractHsCtxtTyNames ctxt + `unionNameSets` getl ty) `minusNameSet` - mkNameSet (map getTyVarName tvs) - get ty@(HsForAllTy Nothing _ _) = pprPanic "extractHsTyNames" (ppr ty) + mkNameSet (hsLTyVarNames tvs) -extractHsTyNames_s :: [RenamedHsType] -> NameSet +extractHsTyNames_s :: [LHsType Name] -> NameSet extractHsTyNames_s tys = foldr (unionNameSets . extractHsTyNames) emptyNameSet tys -extractHsCtxtTyNames :: RenamedContext -> NameSet -extractHsCtxtTyNames ctxt = foldr (unionNameSets . get) emptyNameSet ctxt - where - get (cls, tys) = unitNameSet cls `unionNameSets` extractHsTyNames_s tys +extractHsCtxtTyNames :: LHsContext Name -> NameSet +extractHsCtxtTyNames (L _ ctxt) + = foldr (unionNameSets . extractHsPredTyNames . unLoc) emptyNameSet ctxt + +-- You don't import or export implicit parameters, +-- so don't mention the IP names +extractHsPredTyNames (HsClassP cls tys) + = unitNameSet cls `unionNameSets` extractHsTyNames_s tys +extractHsPredTyNames (HsIParam n ty) + = extractHsTyNames ty +\end{code} + + +%************************************************************************ +%* * +\subsection{Free variables of declarations} +%* * +%************************************************************************ + +Return the Names that must be in scope if we are to use this declaration. +In all cases this is set up for interface-file declarations: + - for class decls we ignore the bindings + - for instance decls likewise, plus the pragmas + - for rule decls, we ignore HsRules + - for data decls, we ignore derivings + + *** See "THE NAMING STORY" in HsDecls **** + +\begin{code} +---------------- +hsSigsFVs :: [LSig Name] -> FreeVars +hsSigsFVs sigs = plusFVs (map (hsSigFVs.unLoc) sigs) + +hsSigFVs (Sig v ty) = extractHsTyNames ty +hsSigFVs (SpecInstSig ty) = extractHsTyNames ty +hsSigFVs (SpecSig v ty) = extractHsTyNames ty +hsSigFVs other = emptyFVs + +---------------- +-- XXX - autrijus - handle return type for GADT +conDeclFVs (L _ (ConDecl _ _ tyvars context details _)) + = delFVs (map hsLTyVarName tyvars) $ + extractHsCtxtTyNames context `plusFV` + conDetailsFVs details + +{- +-- gaw 2004 +conDeclFVs (L _ (GadtDecl _ ty)) + = extractHsTyNames ty +-} + +conDetailsFVs (PrefixCon btys) = plusFVs (map bangTyFVs btys) +conDetailsFVs (InfixCon bty1 bty2) = bangTyFVs bty1 `plusFV` bangTyFVs bty2 +conDetailsFVs (RecCon flds) = plusFVs [bangTyFVs bty | (_, bty) <- flds] + +bangTyFVs bty = extractHsTyNames (getBangType bty) \end{code} + +%************************************************************************ +%* * +\subsection{A few functions on generic defintions +%* * +%************************************************************************ + +These functions on generics are defined over Matches Name, which is +why they are here and not in HsMatches. + +\begin{code} +maybeGenericMatch :: LMatch Name -> Maybe (HsType Name, LMatch Name) + -- Tells whether a Match is for a generic definition + -- and extract the type from a generic match and put it at the front + +maybeGenericMatch (L loc (Match (L _ (TypePat (L _ ty)) : pats) sig_ty grhss)) + = Just (ty, L loc (Match pats sig_ty grhss)) + +maybeGenericMatch other_match = Nothing +\end{code}