X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;ds=sidebyside;f=ghc%2Fcompiler%2Frename%2FRnHsSyn.lhs;h=9ff40d5f22b50e3620659299713f24c824899611;hb=a277751c44d6db6f4aa93fd8dc06bfdfbdc86760;hp=b141a302945ecb36c0b4fae0c7ed73ff95f0f0fc;hpb=6c381e873e222417d9a67aeec77b9555eca7b7a8;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnHsSyn.lhs b/ghc/compiler/rename/RnHsSyn.lhs index b141a30..9ff40d5 100644 --- a/ghc/compiler/rename/RnHsSyn.lhs +++ b/ghc/compiler/rename/RnHsSyn.lhs @@ -1,60 +1,145 @@ % -% (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 where -import Ubiq{-uitous-} +#include "HsVersions.h" import HsSyn +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} + +%************************************************************************ +%* * +\subsection{Free variables} +%* * +%************************************************************************ + +These free-variable finders returns tycons and classes too. + +\begin{code} +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 + = getl ty + where + 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 (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} -type RenamedArithSeqInfo = ArithSeqInfo Fake Fake Name RenamedPat -type RenamedBind = Bind Fake Fake Name RenamedPat -type RenamedClassDecl = ClassDecl Fake Fake Name RenamedPat -type RenamedClassOpPragmas = ClassOpPragmas Name -type RenamedClassOpSig = Sig Name -type RenamedClassPragmas = ClassPragmas Name -type RenamedConDecl = ConDecl Name -type RenamedContext = Context Name -type RenamedDataPragmas = DataPragmas Name -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 RenamedGenPragmas = GenPragmas Name -type RenamedHsBinds = HsBinds Fake Fake Name RenamedPat -type RenamedHsExpr = HsExpr Fake Fake Name RenamedPat -type RenamedHsModule = HsModule Fake Fake Name RenamedPat -type RenamedImportedInterface = ImportedInterface Fake Fake Name RenamedPat -type RenamedInstDecl = InstDecl Fake Fake Name RenamedPat -type RenamedInstancePragmas = InstancePragmas Name -type RenamedInterface = Interface Fake Fake Name RenamedPat -type RenamedMatch = Match Fake Fake Name RenamedPat -type RenamedMonoBinds = MonoBinds Fake Fake Name RenamedPat -type RenamedMonoType = MonoType Name -type RenamedPat = InPat Name -type RenamedPolyType = PolyType Name -type RenamedQual = Qual Fake Fake Name RenamedPat -type RenamedSig = Sig Name -type RenamedSpecInstSig = SpecInstSig Name -type RenamedStmt = Stmt Fake Fake Name RenamedPat -type RenamedTyDecl = TyDecl Name +---------------- +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} -collectQualBinders :: [RenamedQual] -> [Name] +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 -collectQualBinders quals - = concat (map collect quals) - where - collect (GeneratorQual pat _) = collectPatBinders pat - collect (FilterQual expr) = [] - collect (LetQual binds) = collectTopLevelBinders binds +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}