X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRnHsSyn.lhs;h=5d316727ca57851b3e0ba09095ac7c53f3ee8ba1;hb=d191be5da8d2934a5c50bdbc605784d6a9043b6f;hp=58e86b0db29dd7d0be27e502abe25e8edd1490ed;hpb=710e207487929c4a5977b5ee3bc6e539091953db;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnHsSyn.lhs b/ghc/compiler/rename/RnHsSyn.lhs index 58e86b0..5d31672 100644 --- a/ghc/compiler/rename/RnHsSyn.lhs +++ b/ghc/compiler/rename/RnHsSyn.lhs @@ -9,50 +9,12 @@ module RnHsSyn where #include "HsVersions.h" import HsSyn -import HsPragmas ( InstancePragmas, GenPragmas, DataPragmas, ClassPragmas, ClassOpPragmas ) - -import TysWiredIn ( tupleTyCon, listTyCon, charTyCon ) +import Class ( FunDep ) +import TysWiredIn ( tupleTyCon, listTyCon, parrTyCon, charTyCon ) import Name ( Name, getName, isTyVarName ) import NameSet import BasicTypes ( Boxity ) -import Outputable -\end{code} - - -\begin{code} -type RenamedArithSeqInfo = ArithSeqInfo Name RenamedPat -type RenamedClassOpSig = Sig Name -type RenamedConDecl = ConDecl Name -type RenamedContext = HsContext 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 RenamedHsPred = HsPred Name -type RenamedRecordBinds = HsRecordBinds Name RenamedPat -type RenamedSig = Sig Name -type RenamedStmt = Stmt Name RenamedPat -type RenamedFixitySig = FixitySig Name -type RenamedDeprecation = DeprecDecl Name -type RenamedHsOverLit = HsOverLit Name - -type RenamedClassOpPragmas = ClassOpPragmas Name -type RenamedClassPragmas = ClassPragmas Name -type RenamedDataPragmas = DataPragmas Name -type RenamedGenPragmas = GenPragmas Name -type RenamedInstancePragmas = InstancePragmas Name +import SrcLoc ( Located(..), unLoc ) \end{code} %************************************************************************ @@ -64,69 +26,115 @@ 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 :: RenamedHsType -> NameSet +extractHsTyVars :: LHsType Name -> NameSet extractHsTyVars x = filterNameSet isTyVarName (extractHsTyNames x) -extractHsTyNames :: RenamedHsType -> NameSet +extractFunDepNames :: FunDep Name -> NameSet +extractFunDepNames (ns1, ns2) = mkNameSet ns1 `unionNameSets` mkNameSet ns2 + +extractHsTyNames :: LHsType Name -> NameSet extractHsTyNames ty - = get ty + = getl ty where - get (HsAppTy ty1 ty2) = get ty1 `unionNameSets` get ty2 - get (HsListTy ty) = unitNameSet listTyCon_name `unionNameSets` get ty - get (HsTupleTy (HsTupCon n _) tys) = unitNameSet n - `unionNameSets` extractHsTyNames_s tys - get (HsFunTy ty1 ty2) = get ty1 `unionNameSets` get ty2 - get (HsPredTy p) = extractHsPredTyNames p - get (HsUsgForAllTy uv ty) = get ty - get (HsUsgTy u ty) = get ty - get (HsOpTy ty1 tycon ty2) = get ty1 `unionNameSets` get ty2 `unionNameSets` - unitNameSet tycon + 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 (unLoc p) + get (HsOpTy ty1 op ty2) = getl ty1 `unionNameSets` getl ty2 `unionNameSets` unitNameSet (unLoc op) + get (HsParTy ty) = getl ty get (HsNumTy n) = emptyNameSet get (HsTyVar tv) = unitNameSet tv - get (HsForAllTy (Just tvs) - ctxt ty) = (extractHsCtxtTyNames ctxt `unionNameSets` get ty) + 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 (hsTyVarNames 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 . extractHsPredTyNames) emptyNameSet ctxt +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 (HsPClass cls tys) +extractHsPredTyNames (HsClassP cls tys) = unitNameSet cls `unionNameSets` extractHsTyNames_s tys -extractHsPredTyNames (HsPIParam n ty) +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 + +---------------- +conDeclFVs (L _ (ConDecl _ tyvars context details)) + = delFVs (map hsLTyVarName tyvars) $ + extractHsCtxtTyNames context `plusFV` + conDetailsFVs details + +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 (unLoc bty)) +\end{code} + + +%************************************************************************ +%* * \subsection{A few functions on generic defintions %* * %************************************************************************ -These functions on generics are defined over RenamedMatches, which is +These functions on generics are defined over Matches Name, which is why they are here and not in HsMatches. \begin{code} -maybeGenericMatch :: RenamedMatch -> Maybe (RenamedHsType, RenamedMatch) +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 (Match tvs (TypePatIn ty : pats) sig_ty grhss) - = Just (ty, Match tvs pats sig_ty grhss) +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}