\section[RnHsSyn]{Specialisations of the @HsSyn@ syntax for the renamer}
\begin{code}
-module RnHsSyn where
+module RnHsSyn(
+ -- Names
+ charTyCon_name, listTyCon_name, parrTyCon_name, tupleTyCon_name,
+ extractHsTyVars, extractHsTyNames, extractHsTyNames_s,
+ extractFunDepNames, extractHsCtxtTyNames, extractHsPredTyNames,
+
+ -- Free variables
+ hsSigsFVs, hsSigFVs, conDeclFVs, bangTyFVs,
+
+ maybeGenericMatch
+ ) where
#include "HsVersions.h"
import HsSyn
-import HsCore
-import Class ( FunDep, DefMeth(..) )
-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 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 RenamedMatchContext = HsMatchContext Name
-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
+import SrcLoc ( Located(..), unLoc )
\end{code}
%************************************************************************
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)
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 (HsAppTy ty1 ty2) = get ty1 `unionNameSets` get ty2
- get (HsListTy ty) = unitNameSet listTyCon_name `unionNameSets` get ty
- get (HsTupleTy con tys) = hsTupConFVs con `unionNameSets` extractHsTyNames_s tys
- get (HsFunTy ty1 ty2) = get ty1 `unionNameSets` get ty2
+ 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 tycon ty2) = get ty1 `unionNameSets` get ty2 `unionNameSets`
- unitNameSet tycon
+ 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 (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
- 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}
-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)
+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 (ClassOpSig _ _ ty _) = extractHsTyNames ty
+hsSigFVs (TypeSig v ty) = extractHsTyNames ty
+hsSigFVs (SpecInstSig ty) = extractHsTyNames ty
+hsSigFVs (SpecSig v ty inl) = 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 })
+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
-----------------
-ruleDeclFVs (HsRule _ _ _ _ _ _) = emptyFVs
-ruleDeclFVs (IfaceRule _ vars _ args rhs _)
- = delFVs (map ufBinderName vars) $
- ufExprFVs rhs `plusFV` plusFVs (map ufExprFVs args)
+conResTyFVs ResTyH98 = emptyFVs
+conResTyFVs (ResTyGADT ty) = extractHsTyNames ty
-----------------
-conDeclFVs (ConDecl _ _ tyvars context details _)
- = delFVs (map hsTyVarName tyvars) $
- extractHsCtxtTyNames context `plusFV`
- conDetailsFVs details
-
-conDetailsFVs (VanillaCon btys) = plusFVs (map bangTyFVs btys)
+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)
-
-----------------
-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
%* *
%************************************************************************
-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}
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