#include "HsVersions.h"
import HsSyn
-import HsPragmas ( InstancePragmas, GenPragmas, DataPragmas, ClassPragmas, ClassOpPragmas )
-
-import TysWiredIn ( tupleTyCon, unboxedTupleTyCon,
- listTyCon, charTyCon )
-import Name ( Name, getName )
+import Class ( FunDep )
+import TysWiredIn ( tupleTyCon, listTyCon, parrTyCon, charTyCon )
+import Name ( Name, getName, isTyVarName )
import NameSet
-import Util
+import BasicTypes ( Boxity )
import Outputable
\end{code}
\begin{code}
-type RenamedArithSeqInfo = ArithSeqInfo Name RenamedPat
+type RenamedHsDecl = HsDecl Name
+type RenamedArithSeqInfo = ArithSeqInfo Name
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 RenamedSpecDataSig = SpecDataSig Name
+type RenamedRuleDecl = RuleDecl Name
+type RenamedTyClDecl = TyClDecl Name
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 RenamedMatch = Match Name RenamedPat
-type RenamedMonoBinds = MonoBinds Name RenamedPat
+type RenamedGRHS = GRHS Name
+type RenamedGRHSs = GRHSs Name
+type RenamedHsBinds = HsBinds Name
+type RenamedHsExpr = HsExpr Name
+type RenamedInstDecl = InstDecl Name
+type RenamedMatchContext = HsMatchContext Name
+type RenamedMatch = Match Name
+type RenamedMonoBinds = MonoBinds Name
type RenamedPat = InPat Name
type RenamedHsType = HsType Name
-type RenamedRecordBinds = HsRecordBinds Name RenamedPat
+type RenamedHsPred = HsPred Name
+type RenamedRecordBinds = HsRecordBinds Name
type RenamedSig = Sig Name
-type RenamedStmt = Stmt Name RenamedPat
+type RenamedStmt = Stmt Name
type RenamedFixitySig = FixitySig Name
-type RenamedDeprecation = Deprecation Name
-
-type RenamedClassOpPragmas = ClassOpPragmas Name
-type RenamedClassPragmas = ClassPragmas Name
-type RenamedDataPragmas = DataPragmas Name
-type RenamedGenPragmas = GenPragmas Name
-type RenamedInstancePragmas = InstancePragmas Name
+type RenamedDeprecation = DeprecDecl Name
+type RenamedHsCmd = HsCmd Name
+type RenamedHsCmdTop = HsCmdTop 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)
-tupleTyCon_name :: Bool -> Int -> Name
-tupleTyCon_name True n = getName (tupleTyCon n)
-tupleTyCon_name False n = getName (unboxedTupleTyCon n)
+extractFunDepNames :: FunDep Name -> NameSet
+extractFunDepNames (ns1, ns2) = mkNameSet ns1 `unionNameSets` mkNameSet ns2
extractHsTyNames :: RenamedHsType -> NameSet
extractHsTyNames ty
= get ty
where
- get (MonoTyApp ty1 ty2) = get ty1 `unionNameSets` get ty2
- get (MonoListTy ty) = unitNameSet listTyCon_name
- `unionNameSets` get ty
- get (MonoTupleTy tys boxed) = unitNameSet (tupleTyCon_name boxed (length tys))
- `unionNameSets` extractHsTyNames_s tys
- get (MonoFunTy ty1 ty2) = get ty1 `unionNameSets` get ty2
- get (MonoIParamTy n ty) = get ty
- get (MonoDictTy cls tys) = unitNameSet cls `unionNameSets` extractHsTyNames_s tys
- get (MonoUsgForAllTy uv ty) = get ty
- get (MonoUsgTy u ty) = get ty
- get (MonoTyVar tv) = unitNameSet tv
- get (HsForAllTy (Just tvs)
- ctxt ty) = (extractHsCtxtTyNames ctxt `unionNameSets` get ty)
+ get (HsAppTy ty1 ty2) = get ty1 `unionNameSets` get ty2
+ get (HsListTy ty) = unitNameSet listTyCon_name `unionNameSets` get ty
+ get (HsPArrTy ty) = unitNameSet parrTyCon_name `unionNameSets` get ty
+ get (HsTupleTy con tys) = extractHsTyNames_s tys
+ get (HsFunTy ty1 ty2) = get ty1 `unionNameSets` get ty2
+ get (HsPredTy p) = extractHsPredTyNames p
+ get (HsOpTy ty1 op ty2) = get ty1 `unionNameSets` get ty2 `unionNameSets` unitNameSet op
+ get (HsParTy ty) = get ty
+ get (HsNumTy n) = emptyNameSet
+ get (HsTyVar tv) = unitNameSet tv
+ get (HsKindSig ty k) = get ty
+ get (HsForAllTy _ tvs
+ ctxt ty) = (extractHsCtxtTyNames ctxt `unionNameSets` get ty)
`minusNameSet`
- mkNameSet (map getTyVarName tvs)
- get ty@(HsForAllTy Nothing _ _) = pprPanic "extractHsTyNames" (ppr ty)
+ mkNameSet (hsTyVarNames tvs)
extractHsTyNames_s :: [RenamedHsType] -> NameSet
extractHsTyNames_s tys = foldr (unionNameSets . extractHsTyNames) emptyNameSet tys
extractHsCtxtTyNames :: RenamedContext -> NameSet
extractHsCtxtTyNames ctxt = foldr (unionNameSets . extractHsPredTyNames) emptyNameSet ctxt
--- You don't import or export implicit parameters, so don't mention
--- the IP names
-extractHsPredTyNames (HsPClass cls tys)
+-- 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 (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}
+----------------
+hsSigsFVs sigs = plusFVs (map hsSigFVs sigs)
+
+hsSigFVs (Sig v ty _) = extractHsTyNames ty
+hsSigFVs (SpecInstSig ty _) = extractHsTyNames ty
+hsSigFVs (SpecSig v ty _) = extractHsTyNames ty
+hsSigFVs other = emptyFVs
+
+----------------
+conDeclFVs (ConDecl _ tyvars context details _)
+ = delFVs (map hsTyVarName tyvars) $
+ extractHsCtxtTyNames context `plusFV`
+ conDetailsFVs details
+
+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 RenamedMatches, which is
+why they are here and not in HsMatches.
+
+\begin{code}
+maybeGenericMatch :: RenamedMatch -> Maybe (RenamedHsType, RenamedMatch)
+ -- 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 (TypePat ty : pats) sig_ty grhss)
+ = Just (ty, Match pats sig_ty grhss)
+
+maybeGenericMatch other_match = Nothing
+\end{code}
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