X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRnHsSyn.lhs;h=6752218b29e3a1bc2ca46aeb7f0c5f5a7e8e55a7;hb=28a464a75e14cece5db40f2765a29348273ff2d2;hp=db49db2daa1038c4333424896db27d7d98bc2ebd;hpb=7a3bd641457666e10d0a47be9f22762e03defbf0;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnHsSyn.lhs b/ghc/compiler/rename/RnHsSyn.lhs index db49db2..6752218 100644 --- a/ghc/compiler/rename/RnHsSyn.lhs +++ b/ghc/compiler/rename/RnHsSyn.lhs @@ -1,64 +1,30 @@ % -% (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} \begin{code} -#include "HsVersions.h" +module RnHsSyn( + -- Names + charTyCon_name, listTyCon_name, parrTyCon_name, tupleTyCon_name, + extractHsTyVars, extractHsTyNames, extractHsTyNames_s, + extractFunDepNames, extractHsCtxtTyNames, extractHsPredTyNames, -module RnHsSyn where + -- Free variables + hsSigsFVs, hsSigFVs, conDeclFVs, bangTyFVs, + + maybeGenericMatch + ) where -IMP_Ubiq() +#include "HsVersions.h" import HsSyn - -import Id ( GenId, SYN_IE(Id) ) -import Name ( Name ) -import Outputable ( Outputable(..){-instance * []-} ) -import PprStyle ( PprStyle(..) ) -import PprType ( GenType, GenTyVar, TyCon ) -import Pretty -import Name ( SYN_IE(NameSet), unitNameSet, mkNameSet, minusNameSet, unionNameSets, emptyNameSet ) -import TyCon ( TyCon ) -import TyVar ( GenTyVar ) -import Unique ( Unique ) -import Util ( panic, pprPanic{-, pprTrace ToDo:rm-} ) -\end{code} - - -\begin{code} -type RenamedArithSeqInfo = ArithSeqInfo Fake Fake Name RenamedPat -type RenamedBind = Bind Fake Fake Name RenamedPat -type RenamedClassDecl = ClassDecl Fake Fake Name RenamedPat -type RenamedClassOpSig = Sig Name -type RenamedConDecl = ConDecl Name -type RenamedContext = Context Name -type RenamedHsDecl = HsDecl Fake Fake Name RenamedPat -type RenamedSpecDataSig = SpecDataSig Name -type RenamedDefaultDecl = DefaultDecl Name -type RenamedFixityDecl = FixityDecl Name -type RenamedGRHS = GRHS Fake Fake Name RenamedPat -type RenamedGRHSsAndBinds = GRHSsAndBinds Fake Fake Name RenamedPat -type RenamedHsBinds = HsBinds Fake Fake Name RenamedPat -type RenamedHsExpr = HsExpr Fake Fake Name RenamedPat -type RenamedHsModule = HsModule Fake Fake Name RenamedPat -type RenamedInstDecl = InstDecl Fake Fake Name RenamedPat -type RenamedMatch = Match Fake Fake Name RenamedPat -type RenamedMonoBinds = MonoBinds Fake Fake Name RenamedPat -type RenamedPat = InPat Name -type RenamedHsType = HsType Name -type RenamedRecordBinds = HsRecordBinds Fake Fake Name RenamedPat -type RenamedQual = Qualifier Fake Fake Name RenamedPat -type RenamedSig = Sig Name -type RenamedSpecInstSig = SpecInstSig Name -type RenamedStmt = Stmt Fake Fake 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 ) +import SrcLoc ( Located(..), unLoc ) \end{code} %************************************************************************ @@ -67,23 +33,124 @@ type RenamedInstancePragmas = InstancePragmas Name %* * %************************************************************************ +These free-variable finders returns tycons and classes too. + \begin{code} -extractCtxtTyNames :: RenamedContext -> NameSet -extractCtxtTyNames ctxt = foldr (unionNameSets . extractHsTyNames . snd) emptyNameSet ctxt +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 :: RenamedHsType -> NameSet +extractHsTyNames :: LHsType Name -> NameSet extractHsTyNames ty - = get ty + = getl ty where - get (MonoTyApp con tys) = foldr (unionNameSets . get) (unitNameSet con) tys - get (MonoListTy tc ty) = unitNameSet tc `unionNameSets` get ty - get (MonoTupleTy tc tys) = foldr (unionNameSets . get) (unitNameSet tc) tys - get (MonoFunTy ty1 ty2) = get ty1 `unionNameSets` get ty2 - get (MonoDictTy cls ty) = unitNameSet cls `unionNameSets` get ty - get (MonoTyVar tv) = unitNameSet tv - get (HsForAllTy tvs ctxt ty) = foldr (unionNameSets . get . snd) (get ty) ctxt + 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 :: [LHsType Name] -> NameSet +extractHsTyNames_s tys = foldr (unionNameSets . extractHsTyNames) emptyNameSet 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 (TypeSig v ty) = extractHsTyNames ty +hsSigFVs (SpecInstSig ty) = extractHsTyNames ty +hsSigFVs (SpecSig v ty inl) = extractHsTyNames ty +hsSigFVs other = emptyFVs + +---------------- +conDeclFVs (L _ (ConDecl { con_qvars = tyvars, con_cxt = context, + con_details = details, con_res = res_ty})) + = delFVs (map hsLTyVarName tyvars) $ + extractHsCtxtTyNames context `plusFV` + conDetailsFVs details `plusFV` + conResTyFVs res_ty + +conResTyFVs ResTyH98 = emptyFVs +conResTyFVs (ResTyGADT 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}