#include "HsVersions.h"
import HsSyn
-import TysWiredIn ( tupleTyCon, listTyCon, charTyCon )
+import HsCore
+import Class ( FunDep, DefMeth(..) )
+import TyCon ( visibleDataCons )
+import TysWiredIn ( tupleTyCon, listTyCon, parrTyCon, charTyCon )
import Name ( Name, getName, isTyVarName )
import NameSet
import BasicTypes ( Boxity )
\begin{code}
+type RenamedHsDecl = HsDecl Name RenamedPat
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 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 RenamedStmt = Stmt Name RenamedPat
type RenamedFixitySig = FixitySig Name
type RenamedDeprecation = DeprecDecl Name
-type RenamedHsOverLit = HsOverLit Name
-type RenamedIfaceSig = IfaceSig Name
\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 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 (HsPArrTy ty) = unitNameSet parrTyCon_name `unionNameSets` get ty
+ 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
+ case tycon of { HsTyOp n -> unitNameSet n ;
+ HsArrow -> emptyNameSet }
+ get (HsParTy ty) = get ty
get (HsNumTy n) = emptyNameSet
get (HsTyVar tv) = unitNameSet tv
+ get (HsKindSig ty k) = get ty
get (HsForAllTy (Just tvs)
ctxt ty) = (extractHsCtxtTyNames ctxt `unionNameSets` get ty)
`minusNameSet`
-- 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
+ - 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})
+ = delFVs (map hsTyVarName tyvars) $
+ extractHsCtxtTyNames context `plusFV`
+ plusFVs (map conDeclFVs (visibleDataCons 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*
+
+tyClDeclFVs (CoreDecl {tcdType = ty, tcdRhs = rhs})
+ = extractHsTyNames ty `plusFV` ufExprFVs rhs
+
+----------------
+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 (IfaceRuleOut _ _) = 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
%* *
%************************************************************************
-- 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 (Match (TypePatIn ty : pats) sig_ty grhss)
+ = Just (ty, Match pats sig_ty grhss)
maybeGenericMatch other_match = Nothing
\end{code}
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