%
-% (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 TysWiredIn ( tupleTyCon, listTyCon, charTyCon )
+import Name ( Name, getName, isTyVarName )
+import NameSet
+import BasicTypes ( Boxity )
+import Outputable
\end{code}
+
\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 RenamedArithSeqInfo = ArithSeqInfo Name RenamedPat
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 RenamedContext = HsContext Name
+type RenamedHsDecl = HsDecl Name RenamedPat
+type RenamedRuleDecl = RuleDecl Name RenamedPat
+type RenamedTyClDecl = TyClDecl Name RenamedPat
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 RenamedRecordBinds = HsRecordBinds 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 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 RenamedPat = InPat Name
-type RenamedPolyType = PolyType Name
-type RenamedQual = Qual Fake Fake Name RenamedPat
+type RenamedHsType = HsType Name
+type RenamedHsPred = HsPred Name
+type RenamedRecordBinds = HsRecordBinds Name RenamedPat
type RenamedSig = Sig Name
-type RenamedSpecInstSig = SpecInstSig Name
-type RenamedStmt = Stmt Fake Fake Name RenamedPat
-type RenamedTyDecl = TyDecl Name
+type RenamedStmt = Stmt Name RenamedPat
+type RenamedFixitySig = FixitySig Name
+type RenamedDeprecation = DeprecDecl Name
+type RenamedHsOverLit = HsOverLit Name
+type RenamedIfaceSig = IfaceSig Name
\end{code}
+%************************************************************************
+%* *
+\subsection{Free variables}
+%* *
+%************************************************************************
+
+These free-variable finders returns tycons and classes too.
+
\begin{code}
-collectQualBinders :: [RenamedQual] -> [Name]
+charTyCon_name, listTyCon_name :: Name
+charTyCon_name = getName charTyCon
+listTyCon_name = getName listTyCon
+
+tupleTyCon_name :: Boxity -> Int -> Name
+tupleTyCon_name boxity n = getName (tupleTyCon boxity n)
+
+extractHsTyVars :: RenamedHsType -> NameSet
+extractHsTyVars x = filterNameSet isTyVarName (extractHsTyNames x)
-collectQualBinders quals
- = concat (map collect quals)
+extractHsTyNames :: RenamedHsType -> NameSet
+extractHsTyNames ty
+ = get ty
where
- collect (GeneratorQual pat _) = collectPatBinders pat
- collect (FilterQual expr) = []
- collect (LetQual binds) = collectTopLevelBinders binds
+ 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 (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
+ get (HsTyVar tv) = unitNameSet tv
+ get (HsForAllTy (Just tvs)
+ ctxt ty) = (extractHsCtxtTyNames ctxt `unionNameSets` get ty)
+ `minusNameSet`
+ mkNameSet (hsTyVarNames tvs)
+ get ty@(HsForAllTy Nothing _ _) = pprPanic "extractHsTyNames" (ppr ty)
+
+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)
+ = unitNameSet cls `unionNameSets` extractHsTyNames_s tys
+extractHsPredTyNames (HsPIParam n ty)
+ = extractHsTyNames ty
+\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 tvs (TypePatIn ty : pats) sig_ty grhss)
+ = Just (ty, Match tvs pats sig_ty grhss)
+
+maybeGenericMatch other_match = Nothing
\end{code}
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