X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRnHsSyn.lhs;h=4789d89c18bfc37e4800cc9ddc41eabdc1b7303b;hb=2767767f7b4acf89f56d18231f143b60429631f6;hp=9642f05e897d4af9e218fe55332b3f38c41024c1;hpb=33d4a6bdb9a9b267464459aa049a25f4542305f1;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnHsSyn.lhs b/ghc/compiler/rename/RnHsSyn.lhs index 9642f05..4789d89 100644 --- a/ghc/compiler/rename/RnHsSyn.lhs +++ b/ghc/compiler/rename/RnHsSyn.lhs @@ -9,6 +9,8 @@ module RnHsSyn where #include "HsVersions.h" import HsSyn +import HsCore +import Class ( FunDep, DefMeth(..) ) import TysWiredIn ( tupleTyCon, listTyCon, charTyCon ) import Name ( Name, getName, isTyVarName ) import NameSet @@ -33,6 +35,7 @@ type RenamedHsBinds = HsBinds Name RenamedPat type RenamedHsExpr = HsExpr Name RenamedPat type RenamedHsModule = HsModule Name RenamedPat type RenamedInstDecl = InstDecl Name RenamedPat +type RenamedMatchContext = HsMatchContext Name type RenamedMatch = Match Name RenamedPat type RenamedMonoBinds = MonoBinds Name RenamedPat type RenamedPat = InPat Name @@ -43,7 +46,6 @@ type RenamedSig = Sig Name type RenamedStmt = Stmt Name RenamedPat type RenamedFixitySig = FixitySig Name type RenamedDeprecation = DeprecDecl Name -type RenamedHsOverLit = HsOverLit Name \end{code} %************************************************************************ @@ -65,18 +67,18 @@ tupleTyCon_name boxity n = getName (tupleTyCon boxity n) extractHsTyVars :: RenamedHsType -> NameSet extractHsTyVars x = filterNameSet isTyVarName (extractHsTyNames x) +extractFunDepNames :: FunDep Name -> NameSet +extractFunDepNames (ns1, ns2) = mkNameSet ns1 `unionNameSets` mkNameSet ns2 + extractHsTyNames :: RenamedHsType -> NameSet extractHsTyNames ty = get 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 (HsTupleTy con tys) = hsTupConFVs con `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 get (HsNumTy n) = emptyNameSet @@ -95,15 +97,132 @@ extractHsCtxtTyNames ctxt = foldr (unionNameSets . extractHsPredTyNames) emptyNa -- 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 + + *** See "THE NAMING STORY" in HsDecls **** + +\begin{code} +tyClDeclFVs :: RenamedTyClDecl -> NameSet +tyClDeclFVs (ForeignType {}) + = emptyFVs + +tyClDeclFVs (IfaceSig {tcdType = ty, tcdIdInfo = id_infos}) + = extractHsTyNames ty `plusFV` + plusFVs (map hsIdInfoFVs id_infos) + +tyClDeclFVs (TyData {tcdCtxt = context, tcdTyVars = tyvars, tcdCons = condecls, tcdDerivs = derivings}) + = delFVs (map hsTyVarName tyvars) $ + extractHsCtxtTyNames context `plusFV` + plusFVs (map conDeclFVs condecls) + +tyClDeclFVs (TySynonym {tcdTyVars = tyvars, tcdSynRhs = ty}) + = delFVs (map hsTyVarName tyvars) (extractHsTyNames ty) + +tyClDeclFVs (ClassDecl {tcdCtxt = context, tcdTyVars = tyvars, tcdFDs = fds, + tcdSigs = sigs, tcdMeths = maybe_meths}) + = delFVs (map hsTyVarName tyvars) $ + extractHsCtxtTyNames context `plusFV` + plusFVs (map extractFunDepNames fds) `plusFV` + hsSigsFVs sigs `plusFV` + dm_fvs + where + dm_fvs = case maybe_meths of + Nothing -> mkFVs [v | ClassOpSig _ (DefMeth v) _ _ <- sigs] + -- No method bindings, so this class decl comes from an interface file, + -- So we want to treat the default-method names as free (they should + -- be defined somewhere else). [In source code this is not so; the class + -- decl will bind whatever default-methods are necessary.] + Just _ -> emptyFVs -- Source code, so the default methods + -- are *bound* not *free* + +---------------- +hsSigsFVs sigs = plusFVs (map hsSigFVs sigs) + +hsSigFVs (Sig v ty _) = extractHsTyNames ty +hsSigFVs (SpecInstSig ty _) = extractHsTyNames ty +hsSigFVs (SpecSig v ty _) = extractHsTyNames ty +hsSigFVs (ClassOpSig _ _ ty _) = extractHsTyNames ty +hsSigFVs other = emptyFVs + +---------------- +instDeclFVs (InstDecl inst_ty _ _ maybe_dfun _) + = extractHsTyNames inst_ty `plusFV` + (case maybe_dfun of { Just n -> unitFV n; Nothing -> emptyFVs }) + +---------------- +ruleDeclFVs (HsRule _ _ _ _ _ _) = emptyFVs +ruleDeclFVs (IfaceRule _ vars _ args rhs _) + = delFVs (map ufBinderName vars) $ + ufExprFVs rhs `plusFV` plusFVs (map ufExprFVs args) + +---------------- +conDeclFVs (ConDecl _ _ tyvars context details _) + = delFVs (map hsTyVarName tyvars) $ + extractHsCtxtTyNames context `plusFV` + conDetailsFVs details + +conDetailsFVs (VanillaCon 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) + +---------------- +hsIdInfoFVs (HsUnfold _ unf) = ufExprFVs unf +hsIdInfoFVs (HsWorker n a) = unitFV n +hsIdInfoFVs other = emptyFVs + +---------------- +ufExprFVs (UfVar n) = unitFV n +ufExprFVs (UfLit l) = emptyFVs +ufExprFVs (UfLitLit l ty) = extractHsTyNames ty +ufExprFVs (UfFCall cc ty) = extractHsTyNames ty +ufExprFVs (UfType ty) = extractHsTyNames ty +ufExprFVs (UfTuple tc es) = hsTupConFVs tc `plusFV` plusFVs (map ufExprFVs es) +ufExprFVs (UfLam v e) = ufBndrFVs v (ufExprFVs e) +ufExprFVs (UfApp e1 e2) = ufExprFVs e1 `plusFV` ufExprFVs e2 +ufExprFVs (UfCase e n as) = ufExprFVs e `plusFV` delFV n (plusFVs (map ufAltFVs as)) +ufExprFVs (UfNote n e) = ufNoteFVs n `plusFV` ufExprFVs e +ufExprFVs (UfLet (UfNonRec b r) e) = ufExprFVs r `plusFV` ufBndrFVs b (ufExprFVs e) +ufExprFVs (UfLet (UfRec prs) e) = foldr ufBndrFVs + (foldr (plusFV . ufExprFVs . snd) (ufExprFVs e) prs) + (map fst prs) + +ufBndrFVs (UfValBinder n ty) fvs = extractHsTyNames ty `plusFV` delFV n fvs +ufBndrFVs (UfTyBinder n k) fvs = delFV n fvs + +ufAltFVs (con, vs, e) = ufConFVs con `plusFV` delFVs vs (ufExprFVs e) + +ufConFVs (UfDataAlt n) = unitFV n +ufConFVs (UfTupleAlt t) = hsTupConFVs t +ufConFVs (UfLitLitAlt _ ty) = extractHsTyNames ty +ufConFVs other = emptyFVs + +ufNoteFVs (UfCoerce ty) = extractHsTyNames ty +ufNoteFVs note = emptyFVs + +hsTupConFVs (HsTupCon n _ _) = unitFV n +\end{code} + +%************************************************************************ +%* * \subsection{A few functions on generic defintions %* * %************************************************************************