#include "HsVersions.h"
import HsSyn
-import HsPragmas ( InstancePragmas, GenPragmas, DataPragmas, ClassPragmas, ClassOpPragmas )
-
+import HsCore
+import Class ( FunDep, DefMeth(..) )
import TysWiredIn ( tupleTyCon, listTyCon, charTyCon )
import Name ( Name, getName, isTyVarName )
import NameSet
import BasicTypes ( Boxity )
+import Maybes ( orElse )
import Outputable
\end{code}
type RenamedHsDecl = HsDecl Name RenamedPat
type RenamedRuleDecl = RuleDecl Name RenamedPat
type RenamedTyClDecl = TyClDecl Name RenamedPat
-type RenamedSpecDataSig = SpecDataSig Name
type RenamedDefaultDecl = DefaultDecl Name
type RenamedForeignDecl = ForeignDecl Name
type RenamedGRHS = GRHS Name RenamedPat
type RenamedFixitySig = FixitySig Name
type RenamedDeprecation = DeprecDecl Name
type RenamedHsOverLit = HsOverLit Name
-
-type RenamedClassOpPragmas = ClassOpPragmas Name
-type RenamedClassPragmas = ClassPragmas Name
-type RenamedDataPragmas = DataPragmas Name
-type RenamedGenPragmas = GenPragmas Name
-type RenamedInstancePragmas = InstancePragmas Name
\end{code}
%************************************************************************
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
%************************************************************************
%* *
+\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 ignroe the bindings
+ - for instance decls likewise, plus the pragmas
+ - for rule decls, we ignore HsRules
+
+\begin{code}
+tyClDeclFVs :: RenamedTyClDecl -> NameSet
+tyClDeclFVs (IfaceSig name ty id_infos loc)
+ = extractHsTyNames ty `plusFV`
+ plusFVs (map hsIdInfoFVs id_infos)
+
+tyClDeclFVs (TyData _ context _ tyvars condecls _ derivings _ _ _)
+ = delFVs (map hsTyVarName tyvars) $
+ extractHsCtxtTyNames context `plusFV`
+ plusFVs (map conDeclFVs condecls) `plusFV`
+ mkNameSet (derivings `orElse` [])
+
+tyClDeclFVs (TySynonym _ tyvars ty _)
+ = delFVs (map hsTyVarName tyvars) (extractHsTyNames ty)
+
+tyClDeclFVs (ClassDecl context _ tyvars fds sigs _ _ src_loc)
+ = delFVs (map hsTyVarName tyvars) $
+ extractHsCtxtTyNames context `plusFV`
+ plusFVs (map extractFunDepNames fds) `plusFV`
+ plusFVs (map hsSigFVs sigs)
+
+----------------
+hsSigFVs (Sig v ty _) = extractHsTyNames ty `addOneFV` v
+hsSigFVs (SpecInstSig ty _) = extractHsTyNames ty
+hsSigFVs (SpecSig v ty _) = extractHsTyNames ty `addOneFV` v
+hsSigFVs (FixSig (FixitySig v _ _)) = unitFV v
+hsSigFVs (InlineSig v p _) = unitFV v
+hsSigFVs (NoInlineSig v p _) = unitFV v
+hsSigFVs (ClassOpSig v dm ty _) = dmFVs dm `plusFV` extractHsTyNames ty `addOneFV` v
+
+dmFVs (Just (DefMeth v)) = unitFV v
+dmFVs 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 _ _ rhs _)
+ = delFVs (map ufBinderName vars) $
+ ufExprFVs rhs
+
+----------------
+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) = unitFV n
+hsIdInfoFVs other = emptyFVs
+
+----------------
+ufExprFVs (UfVar n) = unitFV n
+ufExprFVs (UfLit l) = emptyFVs
+ufExprFVs (UfLitLit l ty) = extractHsTyNames ty
+ufExprFVs (UfCCall 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
%* *
%************************************************************************