X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;ds=sidebyside;f=ghc%2Fcompiler%2Frename%2FRnHsSyn.lhs;h=9ff40d5f22b50e3620659299713f24c824899611;hb=cafceec49550e38ee039fc03e3b07c64bdd00c23;hp=3dd375f31b8564b9604110061f5b550eadd444a0;hpb=9dd6e1c216993624a2cd74b62ca0f0569c02c26b;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnHsSyn.lhs b/ghc/compiler/rename/RnHsSyn.lhs index 3dd375f..9ff40d5 100644 --- a/ghc/compiler/rename/RnHsSyn.lhs +++ b/ghc/compiler/rename/RnHsSyn.lhs @@ -1,5 +1,5 @@ % -% (c) The AQUA Project, Glasgow University, 1996 +% (c) The AQUA Project, Glasgow University, 1996-1998 % \section[RnHsSyn]{Specialisations of the @HsSyn@ syntax for the renamer} @@ -9,50 +9,13 @@ module RnHsSyn where #include "HsVersions.h" import HsSyn -import HsPragmas ( InstancePragmas, GenPragmas, DataPragmas, ClassPragmas, ClassOpPragmas ) - -import Id ( GenId, Id ) -import BasicTypes ( Unused, NewOrData, IfaceFlavour ) -import Name ( Name ) -import Name ( NameSet, unitNameSet, mkNameSet, minusNameSet, unionNameSets, emptyNameSet ) -import TyVar ( GenTyVar ) -import Unique ( Unique ) -import Util -import Outputable -\end{code} - - -\begin{code} -type RenamedArithSeqInfo = ArithSeqInfo Unused Name RenamedPat -type RenamedClassDecl = ClassDecl Unused Name RenamedPat -type RenamedClassOpSig = Sig Name -type RenamedConDecl = ConDecl Name -type RenamedContext = Context Name -type RenamedHsDecl = HsDecl Unused Name RenamedPat -type RenamedSpecDataSig = SpecDataSig Name -type RenamedDefaultDecl = DefaultDecl Name -type RenamedFixityDecl = FixityDecl Name -type RenamedGRHS = GRHS Unused Name RenamedPat -type RenamedGRHSsAndBinds = GRHSsAndBinds Unused Name RenamedPat -type RenamedHsBinds = HsBinds Unused Name RenamedPat -type RenamedHsExpr = HsExpr Unused Name RenamedPat -type RenamedHsModule = HsModule Unused Name RenamedPat -type RenamedInstDecl = InstDecl Unused Name RenamedPat -type RenamedMatch = Match Unused Name RenamedPat -type RenamedMonoBinds = MonoBinds Unused Name RenamedPat -type RenamedPat = InPat Name -type RenamedHsType = HsType Name -type RenamedRecordBinds = HsRecordBinds Unused Name RenamedPat -type RenamedSig = Sig Name -type RenamedSpecInstSig = SpecInstSig Name -type RenamedStmt = Stmt Unused Name RenamedPat -type RenamedTyDecl = TyDecl Name - -type RenamedClassOpPragmas = ClassOpPragmas Name -type RenamedClassPragmas = ClassPragmas Name -type RenamedDataPragmas = DataPragmas Name -type RenamedGenPragmas = GenPragmas Name -type RenamedInstancePragmas = InstancePragmas Name +import Class ( FunDep ) +import TysWiredIn ( tupleTyCon, listTyCon, parrTyCon, charTyCon ) +import Name ( Name, getName, isTyVarName ) +import NameSet +import BasicTypes ( Boxity ) +-- gaw 2004 +import SrcLoc ( Located(..), unLoc ) \end{code} %************************************************************************ @@ -64,26 +27,119 @@ type RenamedInstancePragmas = InstancePragmas Name These free-variable finders returns tycons and classes too. \begin{code} -extractHsTyNames :: RenamedHsType -> NameSet +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) + +extractFunDepNames :: FunDep Name -> NameSet +extractFunDepNames (ns1, ns2) = mkNameSet ns1 `unionNameSets` mkNameSet ns2 + +extractHsTyNames :: LHsType Name -> NameSet extractHsTyNames ty - = get ty + = getl ty where - get (MonoTyApp ty1 ty2) = get ty1 `unionNameSets` get ty2 - get (MonoListTy tc ty) = unitNameSet tc `unionNameSets` get ty - get (MonoTupleTy tc tys) = unitNameSet tc `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 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) + 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 + +---------------- +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}