X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Frename%2FRename.lhs;h=572000707273805b2d0a78142ca82e9841a4b2b6;hb=0d8269cc016f7063365a9d335c6108703d3d1286;hp=d9b7e10b02b3a04abe29b3f8a75b05422652b3df;hpb=ab8279d659dd0fccd8738735c11f8a0767505570;p=ghc-hetmet.git diff --git a/ghc/compiler/rename/Rename.lhs b/ghc/compiler/rename/Rename.lhs index d9b7e10..5720007 100644 --- a/ghc/compiler/rename/Rename.lhs +++ b/ghc/compiler/rename/Rename.lhs @@ -10,40 +10,44 @@ module Rename ( renameModule ) where import HsSyn import RdrHsSyn ( RdrNameHsModule ) -import RnHsSyn ( RenamedHsModule, RenamedHsDecl, extractHsTyNames ) +import RnHsSyn ( RenamedHsModule, RenamedHsDecl, extractHsTyNames, extractHsCtxtTyNames ) -import CmdLineOpts ( opt_HiMap, opt_D_show_rn_trace, - opt_D_dump_rn, opt_D_show_rn_stats, +import CmdLineOpts ( opt_HiMap, opt_D_dump_rn_trace, + opt_D_dump_rn, opt_D_dump_rn_stats, opt_WarnUnusedBinds, opt_WarnUnusedImports ) import RnMonad import RnNames ( getGlobalNames ) -import RnSource ( rnIfaceDecl, rnSourceDecls ) -import RnIfaces ( getImportedInstDecls, importDecl, getImportVersions, getSpecialInstModules, - getDeferredDataDecls, - mkSearchPath, getSlurpedNames, getRnStats +import RnSource ( rnSourceDecls, rnDecl ) +import RnIfaces ( getImportedInstDecls, importDecl, getImportVersions, + getImportedRules, loadHomeInterface, getSlurped ) -import RnEnv ( addImplicitOccsRn, availName, availNames, availsToNameSet, - warnUnusedTopNames +import RnEnv ( availName, availNames, availsToNameSet, + warnUnusedTopNames, mapFvRn, + FreeVars, plusFVs, plusFV, unitFV, emptyFVs, isEmptyFVs ) -import Module ( pprModule ) +import Module ( Module, ModuleName, pprModule, mkSearchPath, mkThisModule ) import Name ( Name, isLocallyDefined, NamedThing(..), ImportReason(..), Provenance(..), - nameModule, pprOccName, nameOccName, + pprOccName, nameOccName, getNameProvenance, occNameUserString, + maybeWiredInTyConName, maybeWiredInIdName, isWiredInName ) +import Id ( idType ) +import DataCon ( dataConTyCon, dataConType ) +import TyCon ( TyCon, tyConDataCons, isSynTyCon, getSynTyConDefn ) import RdrName ( RdrName ) import NameSet -import TyCon ( TyCon ) -import PrelMods ( mAIN, pREL_MAIN ) -import TysWiredIn ( unitTyCon, intTyCon, doubleTyCon ) +import PrelMods ( mAIN_Name, pREL_MAIN_Name ) +import TysWiredIn ( unitTyCon, intTyCon, doubleTyCon, boolTyCon ) import PrelInfo ( ioTyCon_NAME, thinAirIdNames ) -import Type ( funTyCon ) +import Type ( namesOfType, funTyCon ) import ErrUtils ( pprBagOfErrors, pprBagOfWarnings, doIfSet, dumpIfSet, ghcExit ) -import Bag ( isEmptyBag ) -import FiniteMap ( fmToList, delListFromFM ) +import BasicTypes ( NewOrData(..) ) +import Bag ( isEmptyBag, bagToList ) +import FiniteMap ( fmToList, delListFromFM, addToFM, sizeFM, eltsFM ) import UniqSupply ( UniqSupply ) import Util ( equivClasses ) import Maybes ( maybeToBool ) @@ -56,10 +60,11 @@ import Outputable renameModule :: UniqSupply -> RdrNameHsModule -> IO (Maybe - ( RenamedHsModule -- Output, after renaming - , InterfaceDetails -- Interface; for interface file generatino + ( Module + , RenamedHsModule -- Output, after renaming + , InterfaceDetails -- Interface; for interface file generation , RnNameSupply -- Final env; for renaming derivings - , [Module] -- Imported modules; for profiling + , [ModuleName] -- Imported modules; for profiling )) renameModule us this_mod@(HsModule mod_name vers exports imports local_decls loc) @@ -81,7 +86,7 @@ renameModule us this_mod@(HsModule mod_name vers exports imports local_decls loc -- Dump output, if any (case maybe_rn_stuff of Nothing -> return () - Just results@(rn_mod, _, _, _) + Just results@(_, rn_mod, _, _, _) -> dumpIfSet opt_D_dump_rn "Renamer:" (ppr rn_mod) ) >> @@ -103,17 +108,22 @@ rename this_mod@(HsModule mod_name vers exports imports local_decls loc) returnRn Nothing else let - Just (export_env, rn_env, global_avail_env) = maybe_stuff + Just (export_env, gbl_env, fixity_env, global_avail_env) = maybe_stuff in -- RENAME THE SOURCE - initRnMS rn_env SourceMode ( - addImplicits mod_name `thenRn_` + initRnMS gbl_env fixity_env SourceMode ( rnSourceDecls local_decls - ) `thenRn` \ (rn_local_decls, fvs) -> + ) `thenRn` \ (rn_local_decls, source_fvs) -> -- SLURP IN ALL THE NEEDED DECLARATIONS - slurpDecls rn_local_decls `thenRn` \ rn_all_decls -> + let + real_source_fvs = implicitFVs mod_name `plusFV` source_fvs + -- It's important to do the "plus" this way round, so that + -- when compiling the prelude, locally-defined (), Bool, etc + -- override the implicit ones. + in + slurpImpDecls real_source_fvs `thenRn` \ rn_imp_decls -> -- EXIT IF ERRORS FOUND checkErrsRn `thenRn` \ no_errs_so_far -> @@ -124,157 +134,308 @@ rename this_mod@(HsModule mod_name vers exports imports local_decls loc) else -- GENERATE THE VERSION/USAGE INFO - getImportVersions mod_name exports `thenRn` \ import_versions -> + getImportVersions mod_name exports `thenRn` \ my_usages -> getNameSupplyRn `thenRn` \ name_supply -> -- REPORT UNUSED NAMES - reportUnusedNames rn_env global_avail_env + reportUnusedNames gbl_env global_avail_env export_env - fvs `thenRn_` + source_fvs `thenRn_` - -- GENERATE THE SPECIAL-INSTANCE MODULE LIST - -- The "special instance" modules are those modules that contain instance - -- declarations that contain no type constructor or class that was declared - -- in that module. - getSpecialInstModules `thenRn` \ imported_special_inst_mods -> - let - special_inst_decls = [d | InstD d@(InstDecl inst_ty _ _ _ _) <- rn_local_decls, - all (not.isLocallyDefined) (nameSetToList (extractHsTyNames inst_ty)) - ] - special_inst_mods | null special_inst_decls = imported_special_inst_mods - | otherwise = mod_name : imported_special_inst_mods - in - - -- RETURN THE RENAMED MODULE let - import_mods = [mod | ImportDecl mod _ _ _ _ <- imports] - + has_orphans = any isOrphanDecl rn_local_decls + direct_import_mods = [mod | ImportDecl mod _ _ _ _ _ <- imports] + rn_all_decls = rn_imp_decls ++ rn_local_decls renamed_module = HsModule mod_name vers trashed_exports trashed_imports rn_all_decls loc in - rnStats rn_all_decls `thenRn_` - returnRn (Just (renamed_module, - (import_versions, export_env, special_inst_mods), - name_supply, - import_mods)) + rnStats rn_imp_decls `thenRn_` + returnRn (Just (mkThisModule mod_name, + renamed_module, + (has_orphans, my_usages, export_env), + name_supply, + direct_import_mods)) where trashed_exports = {-trace "rnSource:trashed_exports"-} Nothing trashed_imports = {-trace "rnSource:trashed_imports"-} [] \end{code} -@addImplicits@ forces the renamer to slurp in some things which aren't +@implicitFVs@ forces the renamer to slurp in some things which aren't mentioned explicitly, but which might be needed by the type checker. \begin{code} -addImplicits mod_name - = addImplicitOccsRn (implicit_main ++ default_tys ++ thinAirIdNames) +implicitFVs mod_name + = implicit_main `plusFV` + mkNameSet default_tys `plusFV` + mkNameSet thinAirIdNames where -- Add occurrences for Int, Double, and (), because they -- are the types to which ambigious type variables may be defaulted by -- the type checker; so they won't always appear explicitly. -- [The () one is a GHC extension for defaulting CCall results.] -- ALSO: funTyCon, since it occurs implicitly everywhere! - -- (we don't want to be bothered with addImplicitOcc at every - -- function application) + -- (we don't want to be bothered with making funTyCon a + -- free var at every function application!) default_tys = [getName intTyCon, getName doubleTyCon, - getName unitTyCon, getName funTyCon] + getName unitTyCon, getName funTyCon, getName boolTyCon] -- Add occurrences for IO or PrimIO - implicit_main | mod_name == mAIN - || mod_name == pREL_MAIN = [ioTyCon_NAME] - | otherwise = [] + implicit_main | mod_name == mAIN_Name + || mod_name == pREL_MAIN_Name = unitFV ioTyCon_NAME + | otherwise = emptyFVs +\end{code} + +\begin{code} +isOrphanDecl (InstD (InstDecl inst_ty _ _ _ _)) + = not (foldNameSet ((||) . isLocallyDefined) False (extractHsTyNames inst_ty)) +isOrphanDecl (RuleD (RuleDecl _ _ _ lhs _ _)) + = check lhs + where + check (HsVar v) = not (isLocallyDefined v) + check (HsApp f a) = check f && check a + check other = True +isOrphanDecl other = False \end{code} +%********************************************************* +%* * +\subsection{Slurping declarations} +%* * +%********************************************************* + \begin{code} -slurpDecls decls - = -- First of all, get all the compulsory decls - slurp_compulsories decls `thenRn` \ decls1 -> +------------------------------------------------------- +slurpImpDecls source_fvs + = traceRn (text "slurpImp" <+> fsep (map ppr (nameSetToList source_fvs))) `thenRn_` + -- The current slurped-set records all local things + getSlurped `thenRn` \ local_binders -> + + slurpSourceRefs source_fvs `thenRn` \ (decls1, needed1, wired_in) -> + let + inst_gates1 = foldr (plusFV . getWiredInGates) source_fvs wired_in + inst_gates2 = foldr (plusFV . getGates source_fvs) inst_gates1 decls1 + in + -- Do this first slurpDecls before the getImportedInstDecls, + -- so that the home modules of all the inst_gates will be sure to be loaded + slurpDecls decls1 needed1 `thenRn` \ (decls2, needed2) -> + mapRn_ (load_home local_binders) wired_in `thenRn_` + + -- Now we can get the instance decls + getImportedInstDecls inst_gates2 `thenRn` \ inst_decls -> + rnIfaceDecls decls2 needed2 inst_decls `thenRn` \ (decls3, needed3) -> + closeDecls decls3 needed3 + where + load_home local_binders name + | name `elemNameSet` local_binders = returnRn () + -- When compiling the prelude, a wired-in thing may + -- be defined in this module, in which case we don't + -- want to load its home module! + -- Using 'isLocallyDefined' doesn't work because some of + -- the free variables returned are simply 'listTyCon_Name', + -- with a system provenance. We could look them up every time + -- but that seems a waste. + | otherwise = loadHomeInterface doc name `thenRn_` + returnRn () + where + doc = ptext SLIT("need home module for wired in thing") <+> ppr name + +------------------------------------------------------- +slurpSourceRefs :: FreeVars -- Variables referenced in source + -> RnMG ([RenamedHsDecl], + FreeVars, -- Un-satisfied needs + [Name]) -- Those variables referenced in the source + -- that turned out to be wired in things + +slurpSourceRefs source_fvs + = go [] emptyFVs [] (nameSetToList source_fvs) + where + go decls fvs wired [] + = returnRn (decls, fvs, wired) + go decls fvs wired (wanted_name:refs) + | isWiredInName wanted_name + = go decls fvs (wanted_name:wired) refs + | otherwise + = importDecl wanted_name `thenRn` \ maybe_decl -> + case maybe_decl of + -- No declaration... (already slurped, or local) + Nothing -> go decls fvs wired refs + Just decl -> rnIfaceDecl decl `thenRn` \ (new_decl, fvs1) -> + go (new_decl : decls) (fvs1 `plusFV` fvs) wired + (extraGates new_decl ++ refs) + +-- Hack alert. If we suck in a class +-- class Ord a => Baz a where ... +-- then Eq is also a 'gate'. Why? Because Eq is a superclass of Ord, +-- and hence may be needed during context reduction even though +-- Eq is never mentioned explicitly. So we snaffle out the super-classes +-- right now, so that slurpSourceRefs will heave them in +-- +-- Similarly the RHS of type synonyms +extraGates (TyClD (ClassDecl ctxt _ tvs _ _ _ _ _ _ _)) + = nameSetToList (delListFromNameSet (extractHsCtxtTyNames ctxt) (map getTyVarName tvs)) +extraGates (TyClD (TySynonym _ tvs ty _)) + = nameSetToList (delListFromNameSet (extractHsTyNames ty) (map getTyVarName tvs)) +extraGates other = [] + +------------------------------------------------------- +-- closeDecls keeps going until the free-var set is empty +closeDecls decls needed + | not (isEmptyFVs needed) + = slurpDecls decls needed `thenRn` \ (decls1, needed1) -> + closeDecls decls1 needed1 + + | otherwise + = getImportedRules `thenRn` \ rule_decls -> + case rule_decls of + [] -> returnRn decls -- No new rules, so we are done + other -> rnIfaceDecls decls emptyFVs rule_decls `thenRn` \ (decls1, needed1) -> + closeDecls decls1 needed1 + + +------------------------------------------------------- +rnIfaceDecls :: [RenamedHsDecl] -> FreeVars + -> [(Module, RdrNameHsDecl)] + -> RnM d ([RenamedHsDecl], FreeVars) +rnIfaceDecls decls fvs [] = returnRn (decls, fvs) +rnIfaceDecls decls fvs (d:ds) = rnIfaceDecl d `thenRn` \ (new_decl, fvs1) -> + rnIfaceDecls (new_decl:decls) (fvs1 `plusFV` fvs) ds + +rnIfaceDecl (mod, decl) = initIfaceRnMS mod (rnDecl decl) + + +------------------------------------------------------- +-- Augment decls with any decls needed by needed. +-- Return also free vars of the new decls (only) +slurpDecls decls needed + = go decls emptyFVs (nameSetToList needed) + where + go decls fvs [] = returnRn (decls, fvs) + go decls fvs (ref:refs) = slurpDecl decls fvs ref `thenRn` \ (decls1, fvs1) -> + go decls1 fvs1 refs + +------------------------------------------------------- +slurpDecl decls fvs wanted_name + = importDecl wanted_name `thenRn` \ maybe_decl -> + case maybe_decl of + -- No declaration... (wired in thing) + Nothing -> returnRn (decls, fvs) + + -- Found a declaration... rename it + Just decl -> rnIfaceDecl decl `thenRn` \ (new_decl, fvs1) -> + returnRn (new_decl:decls, fvs1 `plusFV` fvs) +\end{code} + + +%********************************************************* +%* * +\subsection{Extracting the 'gates'} +%* * +%********************************************************* + +When we import a declaration like + + data T = T1 Wibble | T2 Wobble - -- Next get the optional ones - closeDecls optional_mode decls1 `thenRn` \ decls2 -> +we don't want to treat Wibble and Wobble as gates *unless* T1, T2 +respectively are mentioned by the user program. If only T is mentioned +we want only T to be a gate; that way we don't suck in useless instance +decls for (say) Eq Wibble, when they can't possibly be useful. - -- Finally get those deferred data type declarations - getDeferredDataDecls `thenRn` \ data_decls -> - mapRn (rn_data_decl compulsory_mode) data_decls `thenRn` \ rn_data_decls -> +@getGates@ takes a newly imported (and renamed) decl, and the free +vars of the source program, and extracts from the decl the gate names. - -- Done - returnRn (rn_data_decls ++ decls2) +\begin{code} +getGates source_fvs (SigD (IfaceSig _ ty _ _)) + = extractHsTyNames ty +getGates source_fvs (TyClD (ClassDecl ctxt cls tvs sigs _ _ _ _ _ _)) + = delListFromNameSet (foldr (plusFV . get) (extractHsCtxtTyNames ctxt) sigs) + (map getTyVarName tvs) + `addOneToNameSet` cls + where + get (ClassOpSig n _ ty _) + | n `elemNameSet` source_fvs = extractHsTyNames ty + | otherwise = emptyFVs + +getGates source_fvs (TyClD (TySynonym tycon tvs ty _)) + = delListFromNameSet (extractHsTyNames ty) + (map getTyVarName tvs) + `addOneToNameSet` tycon + +getGates source_fvs (TyClD (TyData _ ctxt tycon tvs cons _ _ _)) + = delListFromNameSet (foldr (plusFV . get) (extractHsCtxtTyNames ctxt) cons) + (map getTyVarName tvs) + `addOneToNameSet` tycon where - compulsory_mode = InterfaceMode Compulsory - optional_mode = InterfaceMode Optional - - -- The "slurp_compulsories" function is a loop that alternates - -- between slurping compulsory decls and slurping the instance - -- decls thus made relavant. - -- We *must* loop again here. Why? Two reasons: - -- (a) an instance decl will give rise to an unresolved dfun, whose - -- decl we must slurp to get its version number; that's the version - -- number for the whole instance decl. (And its unfolding might mention new - -- unresolved names.) - -- (b) an instance decl might give rise to a new unresolved class, - -- whose decl we must slurp, which might let in some new instance decls, - -- and so on. Example: instance Foo a => Baz [a] where ... - slurp_compulsories decls - = closeDecls compulsory_mode decls `thenRn` \ decls1 -> + get (ConDecl n tvs ctxt details _) + | n `elemNameSet` source_fvs + -- If the constructor is method, get fvs from all its fields + = delListFromNameSet (get_details details `plusFV` + extractHsCtxtTyNames ctxt) + (map getTyVarName tvs) + get (ConDecl n tvs ctxt (RecCon fields) _) + -- Even if the constructor isn't mentioned, the fields + -- might be, as selectors. They can't mention existentially + -- bound tyvars (typechecker checks for that) so no need for + -- the deleteListFromNameSet part + = foldr (plusFV . get_field) emptyFVs fields - -- Instance decls still pending? - getImportedInstDecls `thenRn` \ inst_decls -> - if null inst_decls then - -- No, none - returnRn decls1 - else - -- Yes, there are some, so rename them and loop - traceRn (sep [ptext SLIT("Slurped"), int (length inst_decls), ptext SLIT("instance decls")]) - `thenRn_` - mapRn (rn_inst_decl compulsory_mode) inst_decls `thenRn` \ new_inst_decls -> - slurp_compulsories (new_inst_decls ++ decls1) + get other_con = emptyFVs + + get_details (VanillaCon tys) = plusFVs (map get_bang tys) + get_details (InfixCon t1 t2) = get_bang t1 `plusFV` get_bang t2 + get_details (RecCon fields) = plusFVs [get_bang t | (_, t) <- fields] + get_details (NewCon t _) = extractHsTyNames t + + get_field (fs,t) | any (`elemNameSet` source_fvs) fs = get_bang t + | otherwise = emptyFVs + + get_bang (Banged t) = extractHsTyNames t + get_bang (Unbanged t) = extractHsTyNames t + get_bang (Unpacked t) = extractHsTyNames t + +getGates source_fvs other_decl = emptyFVs \end{code} +getWiredInGates is just like getGates, but it sees a wired-in Name +rather than a declaration. + \begin{code} -closeDecls :: RnMode - -> [RenamedHsDecl] -- Declarations got so far - -> RnMG [RenamedHsDecl] -- input + extra decls slurped - -- The monad includes a list of possibly-unresolved Names - -- This list is empty when closeDecls returns - -closeDecls mode decls - = popOccurrenceName mode `thenRn` \ maybe_unresolved -> - case maybe_unresolved of - - -- No more unresolved names - Nothing -> returnRn decls - - -- An unresolved name - Just name_w_loc - -> -- Slurp its declaration, if any --- traceRn (sep [ptext SLIT("Considering"), ppr name_w_loc]) `thenRn_` - importDecl name_w_loc mode `thenRn` \ maybe_decl -> - case maybe_decl of - - -- No declaration... (wired in thing or optional) - Nothing -> closeDecls mode decls - - -- Found a declaration... rename it - Just decl -> rn_iface_decl mod_name mode decl `thenRn` \ new_decl -> - closeDecls mode (new_decl : decls) - where - mod_name = nameModule (fst name_w_loc) - -rn_iface_decl mod_name mode decl - = setModuleRn mod_name $ - initRnMS emptyRnEnv mode (rnIfaceDecl decl) - -rn_inst_decl mode (mod_name,decl) = rn_iface_decl mod_name mode (InstD decl) -rn_data_decl mode (mod_name,ty_decl) = rn_iface_decl mod_name mode (TyClD ty_decl) +getWiredInGates name | is_tycon = get_wired_tycon the_tycon + | otherwise = get_wired_id the_id + where + maybe_wired_in_tycon = maybeWiredInTyConName name + is_tycon = maybeToBool maybe_wired_in_tycon + maybe_wired_in_id = maybeWiredInIdName name + Just the_tycon = maybe_wired_in_tycon + Just the_id = maybe_wired_in_id + +get_wired_id id = namesOfType (idType id) + +get_wired_tycon tycon + | isSynTyCon tycon + = namesOfType ty `minusNameSet` mkNameSet (map getName tyvars) + + | otherwise -- data or newtype + = foldr (unionNameSets . namesOfType . dataConType) emptyNameSet data_cons + where + (tyvars,ty) = getSynTyConDefn tycon + data_cons = tyConDataCons tycon \end{code} + +%********************************************************* +%* * +\subsection{Unused names} +%* * +%********************************************************* + \begin{code} -reportUnusedNames (RnEnv gbl_env _) avail_env (ExportEnv export_avails _) mentioned_names +reportUnusedNames gbl_env avail_env (ExportEnv export_avails _) mentioned_names | not (opt_WarnUnusedBinds || opt_WarnUnusedImports) = returnRn () @@ -317,14 +478,80 @@ reportableUnusedName name startsWithUnderscore other = False -- with an underscore rnStats :: [RenamedHsDecl] -> RnMG () -rnStats all_decls - | opt_D_show_rn_trace || - opt_D_show_rn_stats || +rnStats imp_decls + | opt_D_dump_rn_trace || + opt_D_dump_rn_stats || opt_D_dump_rn - = getRnStats all_decls `thenRn` \ msg -> - ioToRnMG (printErrs msg) `thenRn_` + = getRnStats imp_decls `thenRn` \ msg -> + ioToRnM (printErrs msg) `thenRn_` returnRn () | otherwise = returnRn () \end{code} + + +%********************************************************* +%* * +\subsection{Statistics} +%* * +%********************************************************* + +\begin{code} +getRnStats :: [RenamedHsDecl] -> RnMG SDoc +getRnStats imported_decls + = getIfacesRn `thenRn` \ ifaces -> + let + n_mods = length [() | (_, _, Just _) <- eltsFM (iImpModInfo ifaces)] + + decls_read = [decl | (_, avail, True, (_,decl)) <- nameEnvElts (iDecls ifaces), + -- Data, newtype, and class decls are in the decls_fm + -- under multiple names; the tycon/class, and each + -- constructor/class op too. + -- The 'True' selects just the 'main' decl + not (isLocallyDefined (availName avail)) + ] + + (cd_rd, dd_rd, nd_rd, sd_rd, vd_rd, _) = count_decls decls_read + (cd_sp, dd_sp, nd_sp, sd_sp, vd_sp, id_sp) = count_decls imported_decls + + unslurped_insts = iInsts ifaces + inst_decls_unslurped = length (bagToList unslurped_insts) + inst_decls_read = id_sp + inst_decls_unslurped + + stats = vcat + [int n_mods <+> text "interfaces read", + hsep [ int cd_sp, text "class decls imported, out of", + int cd_rd, text "read"], + hsep [ int dd_sp, text "data decls imported, out of", + int dd_rd, text "read"], + hsep [ int nd_sp, text "newtype decls imported, out of", + int nd_rd, text "read"], + hsep [int sd_sp, text "type synonym decls imported, out of", + int sd_rd, text "read"], + hsep [int vd_sp, text "value signatures imported, out of", + int vd_rd, text "read"], + hsep [int id_sp, text "instance decls imported, out of", + int inst_decls_read, text "read"], + text "cls dcls slurp" <+> fsep (map (ppr . tyClDeclName) + [d | TyClD d <- imported_decls, isClassDecl d]), + text "cls dcls read" <+> fsep (map (ppr . tyClDeclName) + [d | TyClD d <- decls_read, isClassDecl d])] + in + returnRn (hcat [text "Renamer stats: ", stats]) + +count_decls decls + = (class_decls, + data_decls, + newtype_decls, + syn_decls, + val_decls, + inst_decls) + where + tycl_decls = [d | TyClD d <- decls] + (class_decls, data_decls, newtype_decls, syn_decls) = countTyClDecls tycl_decls + + val_decls = length [() | SigD _ <- decls] + inst_decls = length [() | InstD _ <- decls] +\end{code} +