X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRnSource.lhs;h=b5386a3d1ab543975eaed852020c52c31e23cb12;hb=0299e1a135c5805e09ed8e2271b3b17fc8a04869;hp=9bcad7ee7bfc5ecdd67834da341723b70acc0646;hpb=1c62b517711ac232a8024d91fd4b317a6804d28e;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/RnSource.lhs b/ghc/compiler/rename/RnSource.lhs index 9bcad7e..b5386a3 100644 --- a/ghc/compiler/rename/RnSource.lhs +++ b/ghc/compiler/rename/RnSource.lhs @@ -5,29 +5,27 @@ \begin{code} module RnSource ( rnTyClDecl, rnIfaceRuleDecl, rnInstDecl, rnSourceDecls, - rnHsType, rnHsSigType, rnHsTypeFVs, rnHsSigTypeFVs ) where #include "HsVersions.h" import RnExpr import HsSyn -import HscTypes ( GlobalRdrEnv ) -import HsTypes ( hsTyVarNames, pprHsContext ) +import HscTypes ( GlobalRdrEnv, AvailEnv ) import RdrName ( RdrName, isRdrDataCon, elemRdrEnv ) -import RdrHsSyn ( RdrNameContext, RdrNameHsType, RdrNameConDecl, RdrNameTyClDecl, - extractRuleBndrsTyVars, extractHsTyRdrTyVars, - extractHsCtxtRdrTyVars, extractGenericPatTyVars +import RdrHsSyn ( RdrNameConDecl, RdrNameTyClDecl, + extractGenericPatTyVars ) import RnHsSyn import HsCore +import RnTypes ( rnHsType, rnHsSigType, rnHsTypeFVs, rnContext ) + import RnBinds ( rnTopBinds, rnMethodBinds, renameSigs, renameSigsFVs ) -import RnEnv ( lookupTopBndrRn, lookupOccRn, newIPName, lookupIfaceName, +import RnEnv ( lookupTopBndrRn, lookupOccRn, lookupIfaceName, lookupOrigNames, lookupSysBinder, newLocalsRn, - bindLocalsFVRn, - bindTyVarsRn, bindTyVars2Rn, - bindTyVarsFV2Rn, extendTyVarEnvFVRn, + bindLocalsFVRn, bindPatSigTyVars, + bindTyVarsRn, extendTyVarEnvFVRn, bindCoreLocalRn, bindCoreLocalsRn, bindLocalNames, checkDupOrQualNames, checkDupNames, mapFvRn ) @@ -37,21 +35,18 @@ import Class ( FunDep, DefMeth (..) ) import DataCon ( dataConId ) import Name ( Name, NamedThing(..) ) import NameSet -import PrelInfo ( derivableClassKeys, cCallishClassKeys ) -import PrelNames ( deRefStablePtr_RDR, newStablePtr_RDR, - bindIO_RDR, returnIO_RDR +import PrelInfo ( derivableClassKeys ) +import PrelNames ( deRefStablePtrName, newStablePtrName, + bindIOName, returnIOName ) import TysWiredIn ( tupleCon ) -import List ( partition, nub ) +import List ( partition ) import Outputable import SrcLoc ( SrcLoc ) import CmdLineOpts ( DynFlag(..) ) -- Warn of unused for-all'd tyvars import Unique ( Uniquable(..) ) import Maybes ( maybeToBool ) -import ErrUtils ( Message ) -import CStrings ( isCLabelString ) -import ListSetOps ( removeDupsEq ) \end{code} @rnSourceDecl@ `renames' declarations. @@ -77,13 +72,13 @@ Checks the @(..)@ etc constraints in the export list. %********************************************************* \begin{code} -rnSourceDecls :: GlobalRdrEnv -> LocalFixityEnv +rnSourceDecls :: GlobalRdrEnv -> AvailEnv -> LocalFixityEnv -> [RdrNameHsDecl] -> RnMG ([RenamedHsDecl], FreeVars) -- The decls get reversed, but that's ok -rnSourceDecls gbl_env local_fixity_env decls - = initRnMS gbl_env emptyRdrEnv local_fixity_env SourceMode (go emptyFVs [] decls) +rnSourceDecls gbl_env avails local_fixity_env decls + = initRnMS gbl_env avails emptyRdrEnv local_fixity_env SourceMode (go emptyFVs [] decls) where -- Fixity and deprecations have been dealt with already; ignore them go fvs ds' [] = returnRn (ds', fvs) @@ -99,52 +94,59 @@ rnSourceDecl (ValD binds) = rnTopBinds binds `thenRn` \ (new_binds, fvs) -> returnRn (ValD new_binds, fvs) rnSourceDecl (TyClD tycl_decl) - = rnTyClDecl tycl_decl `thenRn` \ new_decl -> - rnClassBinds tycl_decl new_decl `thenRn` \ (new_decl', fvs) -> + = rnTyClDecl tycl_decl `thenRn` \ new_decl -> + finishSourceTyClDecl tycl_decl new_decl `thenRn` \ (new_decl', fvs) -> returnRn (TyClD new_decl', fvs `plusFV` tyClDeclFVs new_decl') rnSourceDecl (InstD inst) - = rnInstDecl inst `thenRn` \ new_inst -> - rnInstBinds inst new_inst `thenRn` \ (new_inst', fvs) -> + = rnInstDecl inst `thenRn` \ new_inst -> + finishSourceInstDecl inst new_inst `thenRn` \ (new_inst', fvs) -> returnRn (InstD new_inst', fvs `plusFV` instDeclFVs new_inst') rnSourceDecl (RuleD rule) = rnHsRuleDecl rule `thenRn` \ (new_rule, fvs) -> returnRn (RuleD new_rule, fvs) +rnSourceDecl (ForD ford) + = rnHsForeignDecl ford `thenRn` \ (new_ford, fvs) -> + returnRn (ForD new_ford, fvs) + rnSourceDecl (DefD (DefaultDecl tys src_loc)) = pushSrcLocRn src_loc $ mapFvRn (rnHsTypeFVs doc_str) tys `thenRn` \ (tys', fvs) -> returnRn (DefD (DefaultDecl tys' src_loc), fvs) where - doc_str = text "a `default' declaration" - -rnSourceDecl (ForD (ForeignDecl name imp_exp ty ext_nm cconv src_loc)) - = pushSrcLocRn src_loc $ - lookupOccRn name `thenRn` \ name' -> - let - extra_fvs FoExport - | isDyn = lookupOrigNames [newStablePtr_RDR, deRefStablePtr_RDR, - bindIO_RDR, returnIO_RDR] - | otherwise = - lookupOrigNames [bindIO_RDR, returnIO_RDR] `thenRn` \ fvs -> - returnRn (addOneFV fvs name') - extra_fvs other = returnRn emptyFVs - in - checkRn (ok_ext_nm ext_nm) (badExtName ext_nm) `thenRn_` + doc_str = text "In a `default' declaration" +\end{code} - extra_fvs imp_exp `thenRn` \ fvs1 -> - rnHsTypeFVs fo_decl_msg ty `thenRn` \ (ty', fvs2) -> - returnRn (ForD (ForeignDecl name' imp_exp ty' ext_nm cconv src_loc), - fvs1 `plusFV` fvs2) - where - fo_decl_msg = ptext SLIT("The foreign declaration for") <+> ppr name - isDyn = isDynamicExtName ext_nm +%********************************************************* +%* * +\subsection{Foreign declarations} +%* * +%********************************************************* - ok_ext_nm Dynamic = True - ok_ext_nm (ExtName nm (Just mb)) = isCLabelString nm && isCLabelString mb - ok_ext_nm (ExtName nm Nothing) = isCLabelString nm +\begin{code} +rnHsForeignDecl (ForeignImport name ty spec isDeprec src_loc) + = pushSrcLocRn src_loc $ + lookupTopBndrRn name `thenRn` \ name' -> + rnHsTypeFVs (fo_decl_msg name) ty `thenRn` \ (ty', fvs) -> + returnRn (ForeignImport name' ty' spec isDeprec src_loc, + fvs `plusFV` extras spec) + where + extras (CImport _ _ _ _ CWrapper) = mkFVs [newStablePtrName, + deRefStablePtrName, + bindIOName, returnIOName] + extras _ = emptyFVs + +rnHsForeignDecl (ForeignExport name ty spec isDeprec src_loc) + = pushSrcLocRn src_loc $ + lookupOccRn name `thenRn` \ name' -> + rnHsTypeFVs (fo_decl_msg name) ty `thenRn` \ (ty', fvs) -> + returnRn (ForeignExport name' ty' spec isDeprec src_loc, + mkFVs [bindIOName, returnIOName] `plusFV` fvs) + +fo_decl_msg name = ptext SLIT("The foreign declaration for") <+> ppr name \end{code} @@ -169,17 +171,15 @@ rnInstDecl (InstDecl inst_ty mbinds uprags maybe_dfun_rdr_name src_loc) -- The typechecker checks that all the bindings are for the right class. returnRn (InstDecl inst_ty' EmptyMonoBinds [] maybe_dfun_name src_loc) --- Compare rnClassBinds -rnInstBinds (InstDecl _ mbinds uprags _ _ ) - (InstDecl inst_ty _ _ maybe_dfun_name src_loc) +-- Compare finishSourceTyClDecl +finishSourceInstDecl (InstDecl _ mbinds uprags _ _ ) + (InstDecl inst_ty _ _ maybe_dfun_name src_loc) -- Used for both source decls only = ASSERT( not (maybeToBool maybe_dfun_name) ) -- Source decl! let - meth_doc = text "the bindings in an instance declaration" + meth_doc = text "In the bindings in an instance declaration" meth_names = collectLocatedMonoBinders mbinds - inst_tyvars = case inst_ty of - HsForAllTy (Just inst_tyvars) _ _ -> inst_tyvars - other -> [] + (inst_tyvars, (cls,_)) = getHsInstHead inst_ty -- (Slightly strangely) the forall-d tyvars scope over -- the method bindings too in @@ -188,7 +188,7 @@ rnInstBinds (InstDecl _ mbinds uprags _ _ ) -- NB meth_names can be qualified! checkDupNames meth_doc meth_names `thenRn_` extendTyVarEnvFVRn (map hsTyVarName inst_tyvars) ( - rnMethodBinds [] mbinds + rnMethodBinds cls [] mbinds ) `thenRn` \ (mbinds', meth_fvs) -> let binders = collectMonoBinders mbinds' @@ -216,19 +216,22 @@ rnInstBinds (InstDecl _ mbinds uprags _ _ ) %********************************************************* \begin{code} -rnIfaceRuleDecl (IfaceRule rule_name vars fn args rhs src_loc) +rnIfaceRuleDecl (IfaceRule rule_name act vars fn args rhs src_loc) = pushSrcLocRn src_loc $ lookupOccRn fn `thenRn` \ fn' -> rnCoreBndrs vars $ \ vars' -> mapRn rnCoreExpr args `thenRn` \ args' -> rnCoreExpr rhs `thenRn` \ rhs' -> - returnRn (IfaceRule rule_name vars' fn' args' rhs' src_loc) + returnRn (IfaceRule rule_name act vars' fn' args' rhs' src_loc) + +rnIfaceRuleDecl (IfaceRuleOut fn rule) -- Builtin rules come this way + = lookupOccRn fn `thenRn` \ fn' -> + returnRn (IfaceRuleOut fn' rule) -rnHsRuleDecl (HsRule rule_name tvs vars lhs rhs src_loc) - = ASSERT( null tvs ) - pushSrcLocRn src_loc $ +rnHsRuleDecl (HsRule rule_name act vars lhs rhs src_loc) + = pushSrcLocRn src_loc $ + bindPatSigTyVars (collectRuleBndrSigTys vars) $ - bindTyVarsFV2Rn doc (map UserTyVar sig_tvs) $ \ sig_tvs' _ -> bindLocalsFVRn doc (map get_var vars) $ \ ids -> mapFvRn rn_var (vars `zip` ids) `thenRn` \ (vars', fv_vars) -> @@ -240,11 +243,10 @@ rnHsRuleDecl (HsRule rule_name tvs vars lhs rhs src_loc) bad_vars = [var | var <- ids, not (var `elemNameSet` fv_lhs)] in mapRn (addErrRn . badRuleVar rule_name) bad_vars `thenRn_` - returnRn (HsRule rule_name sig_tvs' vars' lhs' rhs' src_loc, + returnRn (HsRule rule_name act vars' lhs' rhs' src_loc, fv_vars `plusFV` fv_lhs `plusFV` fv_rhs) where - doc = text "the transformation rule" <+> ptext rule_name - sig_tvs = extractRuleBndrsTyVars vars + doc = text "In the transformation rule" <+> ptext rule_name get_var (RuleBndr v) = v get_var (RuleBndrSig v _) = v @@ -282,41 +284,53 @@ rnTyClDecl (IfaceSig {tcdName = name, tcdType = ty, tcdIdInfo = id_infos, tcdLoc mapRn rnIdInfo id_infos `thenRn` \ id_infos' -> returnRn (IfaceSig {tcdName = name', tcdType = ty', tcdIdInfo = id_infos', tcdLoc = loc}) where - doc_str = text "the interface signature for" <+> quotes (ppr name) + doc_str = text "In the interface signature for" <+> quotes (ppr name) + +rnTyClDecl (ForeignType {tcdName = name, tcdFoType = fo_type, tcdExtName = ext_name, tcdLoc = loc}) + = pushSrcLocRn loc $ + lookupTopBndrRn name `thenRn` \ name' -> + returnRn (ForeignType {tcdName = name', tcdFoType = fo_type, tcdExtName = ext_name, tcdLoc = loc}) rnTyClDecl (TyData {tcdND = new_or_data, tcdCtxt = context, tcdName = tycon, tcdTyVars = tyvars, tcdCons = condecls, tcdNCons = nconstrs, - tcdDerivs = derivings, tcdLoc = src_loc, tcdSysNames = sys_names}) + tcdDerivs = derivs, tcdLoc = src_loc, tcdSysNames = sys_names}) = pushSrcLocRn src_loc $ lookupTopBndrRn tycon `thenRn` \ tycon' -> bindTyVarsRn data_doc tyvars $ \ tyvars' -> rnContext data_doc context `thenRn` \ context' -> + rn_derivs derivs `thenRn` \ derivs' -> checkDupOrQualNames data_doc con_names `thenRn_` + + -- Check that there's at least one condecl, + -- or else we're reading an interface file, or -fglasgow-exts + (if null condecls then + doptRn Opt_GlasgowExts `thenRn` \ glaExts -> + getModeRn `thenRn` \ mode -> + checkRn (glaExts || isInterfaceMode mode) + (emptyConDeclsErr tycon) + else returnRn () + ) `thenRn_` + mapRn rnConDecl condecls `thenRn` \ condecls' -> mapRn lookupSysBinder sys_names `thenRn` \ sys_names' -> - rnDerivs derivings `thenRn` \ derivings' -> returnRn (TyData {tcdND = new_or_data, tcdCtxt = context', tcdName = tycon', tcdTyVars = tyvars', tcdCons = condecls', tcdNCons = nconstrs, - tcdDerivs = derivings', tcdLoc = src_loc, tcdSysNames = sys_names'}) + tcdDerivs = derivs', tcdLoc = src_loc, tcdSysNames = sys_names'}) where - data_doc = text "the data type declaration for" <+> quotes (ppr tycon) + data_doc = text "In the data type declaration for" <+> quotes (ppr tycon) con_names = map conDeclName condecls + rn_derivs Nothing = returnRn Nothing + rn_derivs (Just ds) = rnContext data_doc ds `thenRn` \ ds' -> returnRn (Just ds') + rnTyClDecl (TySynonym {tcdName = name, tcdTyVars = tyvars, tcdSynRhs = ty, tcdLoc = src_loc}) = pushSrcLocRn src_loc $ - doptRn Opt_GlasgowExts `thenRn` \ glaExts -> lookupTopBndrRn name `thenRn` \ name' -> bindTyVarsRn syn_doc tyvars $ \ tyvars' -> - rnHsType syn_doc (unquantify glaExts ty) `thenRn` \ ty' -> + rnHsType syn_doc ty `thenRn` \ ty' -> returnRn (TySynonym {tcdName = name', tcdTyVars = tyvars', tcdSynRhs = ty', tcdLoc = src_loc}) where - syn_doc = text "the declaration for type synonym" <+> quotes (ppr name) - - -- For H98 we do *not* universally quantify on the RHS of a synonym - -- Silently discard context... but the tyvars in the rest won't be in scope - -- In interface files all types are quantified, so this is a no-op - unquantify glaExts (HsForAllTy Nothing ctxt ty) | glaExts = ty - unquantify glaExys ty = ty + syn_doc = text "In the declaration for type synonym" <+> quotes (ppr name) rnTyClDecl (ClassDecl {tcdCtxt = context, tcdName = cname, tcdTyVars = tyvars, tcdFDs = fds, tcdSigs = sigs, @@ -333,7 +347,7 @@ rnTyClDecl (ClassDecl {tcdCtxt = context, tcdName = cname, mapRn lookupSysBinder names `thenRn` \ names' -> -- Tyvars scope over bindings and context - bindTyVars2Rn cls_doc tyvars $ \ clas_tyvar_names tyvars' -> + bindTyVarsRn cls_doc tyvars $ \ tyvars' -> -- Check the superclasses rnContext cls_doc context `thenRn` \ context' -> @@ -347,8 +361,8 @@ rnTyClDecl (ClassDecl {tcdCtxt = context, tcdName = cname, (op_sigs, non_op_sigs) = partition isClassOpSig sigs sig_rdr_names_w_locs = [(op,locn) | ClassOpSig op _ _ locn <- sigs] in - checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenRn_` - mapRn (rnClassOp cname' clas_tyvar_names fds') op_sigs `thenRn` \ sigs' -> + checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenRn_` + mapRn (rnClassOp cname' fds') op_sigs `thenRn` \ sigs' -> let binders = mkNameSet [ nm | (ClassOpSig nm _ _ _) <- sigs' ] in @@ -363,10 +377,10 @@ rnTyClDecl (ClassDecl {tcdCtxt = context, tcdName = cname, tcdFDs = fds', tcdSigs = non_ops' ++ sigs', tcdMeths = Nothing, tcdSysNames = names', tcdLoc = src_loc}) where - cls_doc = text "the declaration for class" <+> ppr cname - sig_doc = text "the signatures for class" <+> ppr cname + cls_doc = text "In the declaration for class" <+> ppr cname + sig_doc = text "In the signatures for class" <+> ppr cname -rnClassOp clas clas_tyvars clas_fds sig@(ClassOpSig op dm_stuff ty locn) +rnClassOp clas clas_fds sig@(ClassOpSig op dm_stuff ty locn) = pushSrcLocRn locn $ lookupTopBndrRn op `thenRn` \ op_name -> @@ -390,10 +404,11 @@ rnClassOp clas clas_tyvars clas_fds sig@(ClassOpSig op dm_stuff ty locn) returnRn (ClassOpSig op_name dm_stuff' new_ty locn) -rnClassBinds :: RdrNameTyClDecl -> RenamedTyClDecl -> RnMS (RenamedTyClDecl, FreeVars) +finishSourceTyClDecl :: RdrNameTyClDecl -> RenamedTyClDecl -> RnMS (RenamedTyClDecl, FreeVars) -- Used for source file decls only -rnClassBinds (ClassDecl {tcdMeths = Just mbinds}) -- Get mbinds from here - rn_cls_decl@(ClassDecl {tcdTyVars = tyvars, tcdLoc = src_loc}) -- Everything else is here + -- Renames the default-bindings of a class decl +finishSourceTyClDecl (ClassDecl {tcdMeths = Just mbinds, tcdLoc = src_loc}) -- Get mbinds from here + rn_cls_decl@(ClassDecl {tcdName = cls, tcdTyVars = tyvars}) -- Everything else is here -- There are some default-method bindings (abeit possibly empty) so -- this is a source-code class declaration = -- The newLocals call is tiresome: given a generic class decl @@ -405,6 +420,7 @@ rnClassBinds (ClassDecl {tcdMeths = Just mbinds}) -- Get mbinds from here -- we want to name both "x" tyvars with the same unique, so that they are -- easy to group together in the typechecker. -- Hence the + pushSrcLocRn src_loc $ extendTyVarEnvFVRn (map hsTyVarName tyvars) $ getLocalNameEnv `thenRn` \ name_env -> let @@ -414,12 +430,12 @@ rnClassBinds (ClassDecl {tcdMeths = Just mbinds}) -- Get mbinds from here in checkDupOrQualNames meth_doc meth_rdr_names_w_locs `thenRn_` newLocalsRn gen_rdr_tyvars_w_locs `thenRn` \ gen_tyvars -> - rnMethodBinds gen_tyvars mbinds `thenRn` \ (mbinds', meth_fvs) -> + rnMethodBinds cls gen_tyvars mbinds `thenRn` \ (mbinds', meth_fvs) -> returnRn (rn_cls_decl {tcdMeths = Just mbinds'}, meth_fvs) where - meth_doc = text "the default-methods for class" <+> ppr (tcdName rn_cls_decl) + meth_doc = text "In the default-methods for class" <+> ppr (tcdName rn_cls_decl) -rnClassBinds _ tycl_decl = returnRn (tycl_decl, emptyFVs) +finishSourceTyClDecl _ tycl_decl = returnRn (tycl_decl, emptyFVs) -- Not a class declaration \end{code} @@ -431,22 +447,6 @@ rnClassBinds _ tycl_decl = returnRn (tycl_decl, emptyFVs) %********************************************************* \begin{code} -rnDerivs :: Maybe [RdrName] -> RnMS (Maybe [Name]) - -rnDerivs Nothing -- derivs not specified - = returnRn Nothing - -rnDerivs (Just clss) - = mapRn do_one clss `thenRn` \ clss' -> - returnRn (Just clss') - where - do_one cls = lookupOccRn cls `thenRn` \ clas_name -> - checkRn (getUnique clas_name `elem` derivableClassKeys) - (derivingNonStdClassErr clas_name) `thenRn_` - returnRn clas_name -\end{code} - -\begin{code} conDeclName :: RdrNameConDecl -> (RdrName, SrcLoc) conDeclName (ConDecl n _ _ _ _ l) = (n,l) @@ -464,7 +464,7 @@ rnConDecl (ConDecl name wkr tvs cxt details locn) rnConDetails doc locn details `thenRn` \ new_details -> returnRn (ConDecl new_name new_wkr new_tyvars new_context new_details locn) where - doc = text "the definition of data constructor" <+> quotes (ppr name) + doc = text "In the definition of data constructor" <+> quotes (ppr name) rnConDetails doc locn (VanillaCon tys) = mapRn (rnBangTy doc) tys `thenRn` \ new_tys -> @@ -487,17 +487,9 @@ rnField doc (names, ty) rnBangTy doc ty `thenRn` \ new_ty -> returnRn (new_names, new_ty) -rnBangTy doc (Banged ty) +rnBangTy doc (BangType s ty) = rnHsType doc ty `thenRn` \ new_ty -> - returnRn (Banged new_ty) - -rnBangTy doc (Unbanged ty) - = rnHsType doc ty `thenRn` \ new_ty -> - returnRn (Unbanged new_ty) - -rnBangTy doc (Unpacked ty) - = rnHsType doc ty `thenRn` \ new_ty -> - returnRn (Unpacked new_ty) + returnRn (BangType s new_ty) -- This data decl will parse OK -- data T = a Int @@ -522,151 +514,6 @@ checkConName name %********************************************************* \begin{code} -rnHsTypeFVs :: SDoc -> RdrNameHsType -> RnMS (RenamedHsType, FreeVars) -rnHsTypeFVs doc_str ty - = rnHsType doc_str ty `thenRn` \ ty' -> - returnRn (ty', extractHsTyNames ty') - -rnHsSigTypeFVs :: SDoc -> RdrNameHsType -> RnMS (RenamedHsType, FreeVars) -rnHsSigTypeFVs doc_str ty - = rnHsSigType doc_str ty `thenRn` \ ty' -> - returnRn (ty', extractHsTyNames ty') - -rnHsSigType :: SDoc -> RdrNameHsType -> RnMS RenamedHsType - -- rnHsSigType is used for source-language type signatures, - -- which use *implicit* universal quantification. -rnHsSigType doc_str ty - = rnHsType (text "the type signature for" <+> doc_str) ty - ---------------------------------------- -rnHsType :: SDoc -> RdrNameHsType -> RnMS RenamedHsType - -rnHsType doc (HsForAllTy Nothing ctxt ty) - -- Implicit quantifiction in source code (no kinds on tyvars) - -- Given the signature C => T we universally quantify - -- over FV(T) \ {in-scope-tyvars} - = getLocalNameEnv `thenRn` \ name_env -> - let - mentioned_in_tau = extractHsTyRdrTyVars ty - mentioned_in_ctxt = extractHsCtxtRdrTyVars ctxt - mentioned = nub (mentioned_in_tau ++ mentioned_in_ctxt) - forall_tyvars = filter (not . (`elemRdrEnv` name_env)) mentioned - in - rnForAll doc (map UserTyVar forall_tyvars) ctxt ty - -rnHsType doc (HsForAllTy (Just forall_tyvars) ctxt tau) - -- Explicit quantification. - -- Check that the forall'd tyvars are actually - -- mentioned in the type, and produce a warning if not - = let - mentioned_in_tau = extractHsTyRdrTyVars tau - mentioned_in_ctxt = extractHsCtxtRdrTyVars ctxt - mentioned = nub (mentioned_in_tau ++ mentioned_in_ctxt) - forall_tyvar_names = hsTyVarNames forall_tyvars - - -- Explicitly quantified but not mentioned in ctxt or tau - warn_guys = filter (`notElem` mentioned) forall_tyvar_names - in - mapRn_ (forAllWarn doc tau) warn_guys `thenRn_` - rnForAll doc forall_tyvars ctxt tau - -rnHsType doc (HsTyVar tyvar) - = lookupOccRn tyvar `thenRn` \ tyvar' -> - returnRn (HsTyVar tyvar') - -rnHsType doc (HsOpTy ty1 opname ty2) - = lookupOccRn opname `thenRn` \ name' -> - rnHsType doc ty1 `thenRn` \ ty1' -> - rnHsType doc ty2 `thenRn` \ ty2' -> - returnRn (HsOpTy ty1' name' ty2') - -rnHsType doc (HsNumTy i) - | i == 1 = returnRn (HsNumTy i) - | otherwise = failWithRn (HsNumTy i) - (ptext SLIT("Only unit numeric type pattern is valid")) - -rnHsType doc (HsFunTy ty1 ty2) - = rnHsType doc ty1 `thenRn` \ ty1' -> - -- Might find a for-all as the arg of a function type - rnHsType doc ty2 `thenRn` \ ty2' -> - -- Or as the result. This happens when reading Prelude.hi - -- when we find return :: forall m. Monad m -> forall a. a -> m a - returnRn (HsFunTy ty1' ty2') - -rnHsType doc (HsListTy ty) - = rnHsType doc ty `thenRn` \ ty' -> - returnRn (HsListTy ty') - --- Unboxed tuples are allowed to have poly-typed arguments. These --- sometimes crop up as a result of CPR worker-wrappering dictionaries. -rnHsType doc (HsTupleTy (HsTupCon _ boxity arity) tys) - -- Don't do lookupOccRn, because this is built-in syntax - -- so it doesn't need to be in scope - = mapRn (rnHsType doc) tys `thenRn` \ tys' -> - returnRn (HsTupleTy (HsTupCon tup_name boxity arity) tys') - where - tup_name = tupleTyCon_name boxity arity - - -rnHsType doc (HsAppTy ty1 ty2) - = rnHsType doc ty1 `thenRn` \ ty1' -> - rnHsType doc ty2 `thenRn` \ ty2' -> - returnRn (HsAppTy ty1' ty2') - -rnHsType doc (HsPredTy pred) - = rnPred doc pred `thenRn` \ pred' -> - returnRn (HsPredTy pred') - -rnHsTypes doc tys = mapRn (rnHsType doc) tys -\end{code} - -\begin{code} -rnForAll doc forall_tyvars ctxt ty - = bindTyVarsRn doc forall_tyvars $ \ new_tyvars -> - rnContext doc ctxt `thenRn` \ new_ctxt -> - rnHsType doc ty `thenRn` \ new_ty -> - returnRn (mkHsForAllTy (Just new_tyvars) new_ctxt new_ty) -\end{code} - -\begin{code} -rnContext :: SDoc -> RdrNameContext -> RnMS RenamedContext -rnContext doc ctxt - = mapRn rn_pred ctxt `thenRn` \ theta -> - let - (_, dups) = removeDupsEq theta - -- We only have equality, not ordering - in - -- Check for duplicate assertions - -- If this isn't an error, then it ought to be: - mapRn (addWarnRn . dupClassAssertWarn theta) dups `thenRn_` - returnRn theta - where - --Someone discovered that @CCallable@ and @CReturnable@ - -- could be used in contexts such as: - -- foo :: CCallable a => a -> PrimIO Int - -- Doing this utterly wrecks the whole point of introducing these - -- classes so we specifically check that this isn't being done. - rn_pred pred = rnPred doc pred `thenRn` \ pred'-> - checkRn (not (bad_pred pred')) - (naughtyCCallContextErr pred') `thenRn_` - returnRn pred' - - bad_pred (HsPClass clas _) = getUnique clas `elem` cCallishClassKeys - bad_pred other = False - - -rnPred doc (HsPClass clas tys) - = lookupOccRn clas `thenRn` \ clas_name -> - rnHsTypes doc tys `thenRn` \ tys' -> - returnRn (HsPClass clas_name tys') - -rnPred doc (HsPIParam n ty) - = newIPName n `thenRn` \ name -> - rnHsType doc ty `thenRn` \ ty' -> - returnRn (HsPIParam name ty') -\end{code} - -\begin{code} rnFds :: SDoc -> [FunDep RdrName] -> RnMS [FunDep Name] rnFds doc fds @@ -688,16 +535,15 @@ rnHsTyvar doc tyvar = lookupOccRn tyvar %********************************************************* \begin{code} -rnIdInfo (HsWorker worker) +rnIdInfo (HsWorker worker arity) = lookupOccRn worker `thenRn` \ worker' -> - returnRn (HsWorker worker') + returnRn (HsWorker worker' arity) rnIdInfo (HsUnfold inline expr) = rnCoreExpr expr `thenRn` \ expr' -> returnRn (HsUnfold inline expr') rnIdInfo (HsStrictness str) = returnRn (HsStrictness str) rnIdInfo (HsArity arity) = returnRn (HsArity arity) rnIdInfo HsNoCafRefs = returnRn HsNoCafRefs -rnIdInfo HsCprInfo = returnRn HsCprInfo \end{code} @UfCore@ expressions. @@ -718,9 +564,9 @@ rnCoreExpr (UfLitLit l ty) = rnHsType (text "litlit") ty `thenRn` \ ty' -> returnRn (UfLitLit l ty') -rnCoreExpr (UfCCall cc ty) +rnCoreExpr (UfFCall cc ty) = rnHsType (text "ccall") ty `thenRn` \ ty' -> - returnRn (UfCCall cc ty') + returnRn (UfFCall cc ty') rnCoreExpr (UfTuple (HsTupCon _ boxity arity) args) = mapRn rnCoreExpr args `thenRn` \ args' -> @@ -833,6 +679,7 @@ not one of the @forall@'d variables. validRuleLhs foralls lhs = check lhs where + check (OpApp _ op _ _) = check op check (HsApp e1 e2) = check e1 check (HsVar v) | v `notElem` foralls = True check other = False @@ -846,32 +693,9 @@ validRuleLhs foralls lhs %********************************************************* \begin{code} -derivingNonStdClassErr clas - = hsep [ptext SLIT("non-standard class"), ppr clas, ptext SLIT("in deriving clause")] - badDataCon name = hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)] -forAllWarn doc ty tyvar - = doptRn Opt_WarnUnusedMatches `thenRn` \ warn_unused -> case () of - () | not warn_unused -> returnRn () - | otherwise - -> getModeRn `thenRn` \ mode -> - case mode of { -#ifndef DEBUG - InterfaceMode -> returnRn () ; -- Don't warn of unused tyvars in interface files - -- unless DEBUG is on, in which case it is slightly - -- informative. They can arise from mkRhsTyLam, -#endif -- leading to (say) f :: forall a b. [b] -> [b] - other -> - addWarnRn ( - sep [ptext SLIT("The universally quantified type variable") <+> quotes (ppr tyvar), - nest 4 (ptext SLIT("does not appear in the type") <+> quotes (ppr ty))] - $$ - (ptext SLIT("In") <+> doc) - ) - } - badRuleLhsErr name lhs = sep [ptext SLIT("Rule") <+> ptext name <> colon, nest 4 (ptext SLIT("Illegal left-hand side:") <+> ppr lhs)] @@ -879,21 +703,11 @@ badRuleLhsErr name lhs ptext SLIT("LHS must be of form (f e1 .. en) where f is not forall'd") badRuleVar name var - = sep [ptext SLIT("Rule") <+> ptext name <> colon, + = sep [ptext SLIT("Rule") <+> doubleQuotes (ptext name) <> colon, ptext SLIT("Forall'd variable") <+> quotes (ppr var) <+> ptext SLIT("does not appear on left hand side")] -badExtName :: ExtName -> Message -badExtName ext_nm - = sep [quotes (ppr ext_nm) <+> ptext SLIT("is not a valid C identifier")] - -dupClassAssertWarn ctxt (assertion : dups) - = sep [hsep [ptext SLIT("Duplicate class assertion"), - quotes (ppr assertion), - ptext SLIT("in the context:")], - nest 4 (pprHsContext ctxt <+> ptext SLIT("..."))] - -naughtyCCallContextErr (HsPClass clas _) - = sep [ptext SLIT("Can't use class") <+> quotes (ppr clas), - ptext SLIT("in a context")] +emptyConDeclsErr tycon + = sep [quotes (ppr tycon) <+> ptext SLIT("has no constructors"), + nest 4 (ptext SLIT("(-fglasgow-exts permits this)"))] \end{code}