diff options
Diffstat (limited to 'ghc/compiler/rename/RnIfaces.lhs')
| -rw-r--r-- | ghc/compiler/rename/RnIfaces.lhs | 1261 |
1 files changed, 480 insertions, 781 deletions
diff --git a/ghc/compiler/rename/RnIfaces.lhs b/ghc/compiler/rename/RnIfaces.lhs index 396f021ab0..649391dd4d 100644 --- a/ghc/compiler/rename/RnIfaces.lhs +++ b/ghc/compiler/rename/RnIfaces.lhs @@ -7,866 +7,565 @@ #include "HsVersions.h" module RnIfaces ( - cachedIface, - cachedDecl, CachingResult(..), - rnIfaces, - IfaceCache, initIfaceCache + getInterfaceExports, + getImportedInstDecls, + getSpecialInstModules, + getDecl, getWiredInDecl, + getImportVersions, + + checkUpToDate, + + getDeclBinders, + mkSearchPath ) where IMP_Ubiq() -import PreludeGlaST ( thenPrimIO, newVar, readVar, writeVar, SYN_IE(MutableVar) ) -#if __GLASGOW_HASKELL__ >= 200 -# define ST_THEN `stThen` -# define TRY_IO tryIO -IMPORT_1_3(GHCio(stThen,tryIO)) -#else -# define ST_THEN `thenPrimIO` -# define TRY_IO try -#endif - -import HsSyn -import HsPragmas ( noGenPragmas ) -import RdrHsSyn -import RnHsSyn +import HsSyn ( HsDecl(..), TyDecl(..), ClassDecl(..), HsTyVar, Bind, HsExpr, Sig(..), + HsBinds(..), MonoBinds, DefaultDecl, ConDecl(..), HsType, BangType, IfaceSig(..), + FixityDecl(..), Fixity, Fake, InPat, InstDecl(..), SYN_IE(Version), HsIdInfo + ) +import HsPragmas ( noGenPragmas ) +import RdrHsSyn ( SYN_IE(RdrNameHsDecl), SYN_IE(RdrNameInstDecl), + RdrName, rdrNameOcc + ) +import RnEnv ( newGlobalName, lookupRn, addImplicitOccsRn, availNames ) +import RnSource ( rnHsType ) import RnMonad -import RnSource ( rnTyDecl, rnClassDecl, rnInstDecl, rnPolyType ) -import RnUtils ( SYN_IE(RnEnv), emptyRnEnv, lookupRnEnv, lookupTcRnEnv, extendGlobalRnEnv ) import ParseIface ( parseIface ) -import ParseUtils ( ParsedIface(..), RdrIfaceDecl(..), RdrIfaceInst(..), - VersionsMap(..), UsagesMap(..) - ) -import Bag ( emptyBag, unitBag, consBag, snocBag, - unionBags, unionManyBags, isEmptyBag, bagToList ) import ErrUtils ( SYN_IE(Error), SYN_IE(Warning) ) -import FiniteMap ( emptyFM, lookupFM, addToFM, addToFM_C, plusFM, eltsFM, - fmToList, delListFromFM, sizeFM, foldFM, unitFM, - plusFM_C, addListToFM{-, keysFM ToDo:rm-}, FiniteMap - ) -import Maybes ( maybeToBool, MaybeErr(..) ) -import Name ( origName, moduleOf, nameOf, qualToOrigName, OrigName(..), - isLexCon, RdrName(..), Name{-instance NamedThing-} ) ---import PprStyle -- ToDo:rm ---import Outputable -- ToDo:rm -import PrelInfo ( builtinNameMaps, builtinKeysMap, builtinTcNamesMap, SYN_IE(BuiltinNames) ) +import FiniteMap ( FiniteMap, emptyFM, unitFM, lookupFM, addToFM, addListToFM, fmToList ) +import Name ( Name {-instance NamedThing-}, Provenance, OccName(..), + modAndOcc, occNameString, moduleString, pprModule, + NameSet(..), emptyNameSet, unionNameSets, nameSetToList, + minusNameSet, mkNameSet, + isWiredInName, maybeWiredInTyConName, maybeWiredInIdName + ) +import Id ( GenId, Id(..), idType, dataConTyCon, isDataCon ) +import TyCon ( TyCon, tyConDataCons, isSynTyCon, getSynTyConDefn ) +import Type ( namesOfType ) +import TyVar ( GenTyVar ) +import SrcLoc ( mkIfaceSrcLoc ) +import PrelMods ( gHC__ ) +import Bag +import Maybes ( MaybeErr(..), expectJust, maybeToBool ) +import ListSetOps ( unionLists ) import Pretty -import UniqFM ( emptyUFM ) -import UniqSupply ( splitUniqSupply ) -import Util ( sortLt, removeDups, cmpPString, startsWith, - panic, pprPanic, assertPanic{-, pprTrace ToDo:rm-} ) -\end{code} - -\begin{code} -type ModuleToIfaceContents = FiniteMap Module ParsedIface -type ModuleToIfaceFilePath = FiniteMap Module FilePath - -#if __GLASGOW_HASKELL__ >= 200 -# define REAL_WORLD RealWorld -#else -# define REAL_WORLD _RealWorld -#endif - -data IfaceCache - = IfaceCache - Module -- the name of the module being compiled - BuiltinNames -- so we can avoid going after things - -- the compiler already knows about - (MutableVar REAL_WORLD - (ModuleToIfaceContents, -- interfaces for individual interface files - ModuleToIfaceContents, -- merged interfaces based on module name - -- used for extracting info about original names - ModuleToIfaceFilePath)) - -initIfaceCache mod hi_files - = newVar (emptyFM,emptyFM,hi_files) ST_THEN \ iface_var -> - return (IfaceCache mod builtinNameMaps iface_var) +import PprStyle ( PprStyle(..) ) +import Util ( pprPanic ) \end{code} -********************************************************* -* * -\subsection{Reading interface files} -* * -********************************************************* - -Return cached info about a Module's interface; otherwise, -read the interface (using our @ModuleToIfaceFilePath@ map -to decide where to look). - -Note: we have two notions of interface - * the interface for a particular file name - * the (combined) interface for a particular module name -The idea is that two source files may declare a module -with the same name with the declarations being merged. - -This allows us to have file PreludeList.hs producing -PreludeList.hi but defining part of module Prelude. -When PreludeList is imported its contents will be -added to Prelude. In this way all the original names -for a particular module will be available the imported -decls are renamed. - -ToDo: Check duplicate definitons are the same. -ToDo: Check/Merge duplicate pragmas. +%********************************************************* +%* * +\subsection{Loading a new interface file} +%* * +%********************************************************* \begin{code} -cachedIface :: IfaceCache - -> Bool -- True => want merged interface for original name - -- False => want file interface only - -> FAST_STRING -- item that prompted search (debugging only!) - -> Module - -> IO (MaybeErr ParsedIface Error) - -cachedIface (IfaceCache _ _ iface_var) want_orig_iface item modname - = readVar iface_var ST_THEN \ (iface_fm, orig_fm, file_fm) -> - - case (lookupFM iface_fm modname) of - Just iface -> return (want_iface iface orig_fm) - Nothing -> - case (lookupFM file_fm modname) of - Nothing -> return (Failed (noIfaceErr modname)) - Just file -> - readIface file modname item >>= \ read_iface -> - case read_iface of - Failed err -> -- pprTrace "module-file map:\n" (ppAboves [ppCat [ppPStr m, ppStr f] | (m,f) <- fmToList file_fm]) $ - return (Failed err) - Succeeded iface -> - let - iface_fm' = addToFM iface_fm modname iface - orig_fm' = addToFM_C mergeIfaces orig_fm (iface_mod iface) iface - in - writeVar iface_var (iface_fm', orig_fm', file_fm) ST_THEN \ _ -> - return (want_iface iface orig_fm') - where - want_iface iface orig_fm - | want_orig_iface - = case lookupFM orig_fm modname of - Nothing -> Failed (noOrigIfaceErr modname) - Just orig_iface -> Succeeded orig_iface - | otherwise - = Succeeded iface - - iface_mod (ParsedIface mod _ _ _ _ _ _ _ _ _ _ _ _) = mod - ----------- -mergeIfaces (ParsedIface mod1 (_, files1) _ _ _ _ _ _ fixes1 tdefs1 vdefs1 idefs1 prags1) - (ParsedIface mod2 (_, files2) _ _ _ _ _ _ fixes2 tdefs2 vdefs2 idefs2 prags2) - = --pprTrace "mergeIfaces:" (ppCat [ppStr "import", ppCat (map ppPStr (bagToList files2)), - -- ppStr "merged with", ppPStr mod1]) $ - ASSERT(mod1 == mod2) - ParsedIface mod1 - (True, unionBags files2 files1) - (panic "mergeIface: module version numbers") - (panic "mergeIface: source version numbers") -- Version numbers etc must be extracted from - (panic "mergeIface: usage version numbers") -- the merged file interfaces named above - (panic "mergeIface: decl version numbers") - (panic "mergeIface: exports") - (panic "mergeIface: instance modules") - (plusFM_C (dup_merge {-"fixity" (ppr PprDebug . fixDeclName)-}) fixes1 fixes2) - (plusFM_C (dup_merge {-"tycon/class" (ppr PprDebug . idecl_nm)-}) tdefs1 tdefs2) - (plusFM_C (dup_merge {-"value" (ppr PprDebug . idecl_nm)-}) vdefs1 vdefs2) - (unionBags idefs1 idefs2) - (plusFM_C (dup_merge {-"pragma" ppStr-}) prags1 prags2) - where - dup_merge {-str ppr_dup-} dup1 dup2 - = --pprTrace "mergeIfaces:" - -- (ppCat [ppPStr mod1, ppPStr mod2, ppStr ": dup", ppStr str, ppStr "decl", - -- ppr_dup dup1, ppr_dup dup2]) $ - dup2 - - idecl_nm (TypeSig n _ _) = n - idecl_nm (NewTypeSig n _ _ _) = n - idecl_nm (DataSig n _ _ _ _) = n - idecl_nm (ClassSig n _ _ _) = n - idecl_nm (ValSig n _ _) = n - ----------- -data CachingResult - = CachingFail Error -- tried to find a decl, something went wrong - | CachingHit RdrIfaceDecl -- got it - | CachingAvoided (Maybe (Either RnName RnName)) - -- didn't look in the interface - -- file(s); Nothing => the thing - -- *should* be in the source module; - -- Just (Left ...) => builtin val name; - -- Just (Right ..) => builtin tc name - -cachedDecl :: IfaceCache - -> Bool -- True <=> tycon or class name - -> OrigName - -> IO CachingResult - -cachedDecl iface_cache@(IfaceCache this_mod (b_val_names,b_tc_names) _) - class_or_tycon name@(OrigName mod str) - - = -- pprTrace "cachedDecl:" (ppr PprDebug name) $ - if mod == this_mod then -- some i/face has made a reference - return (CachingAvoided Nothing) -- to something from this module - else +loadInterface :: Pretty -> Module -> RnMG Ifaces +loadInterface doc_str load_mod + = getIfacesRn `thenRn` \ ifaces -> let - b_env = if class_or_tycon then b_tc_names else b_val_names + Ifaces this_mod mod_vers_map export_env_map vers_map decls_map inst_map inst_mods = ifaces in - case (lookupFM b_env name) of - Just rn -> -- in builtins! - return (CachingAvoided (Just ((if class_or_tycon then Right else Left) rn))) - - Nothing -> - cachedIface iface_cache True str mod >>= \ maybe_iface -> - case maybe_iface of - Failed err -> --pprTrace "cachedDecl:fail:" (ppr PprDebug orig) $ - return (CachingFail err) - Succeeded (ParsedIface _ _ _ _ _ _ exps _ _ tdefs vdefs _ _) -> - case (lookupFM (if class_or_tycon then tdefs else vdefs) str) of - Just decl -> return (CachingHit decl) - Nothing -> return (CachingFail (noDeclInIfaceErr mod str)) - ----------- -cachedDeclByType :: IfaceCache - -> RnName{-NB: diff type than cachedDecl -} - -> IO CachingResult - -cachedDeclByType iface_cache rn - -- the idea is: check that, e.g., if we're given an - -- RnClass, then we really get back a ClassDecl from - -- the cache (not an RnData, or something silly) - = cachedDecl iface_cache (isRnTyConOrClass rn) (origName "cachedDeclByType" rn) >>= \ maybe_decl -> + -- CHECK WHETHER WE HAVE IT ALREADY + if maybeToBool (lookupFM export_env_map load_mod) + then + returnRn ifaces -- Already in the cache; don't re-read it + else + + -- READ THE MODULE IN + findAndReadIface doc_str load_mod `thenRn` \ read_result -> + case read_result of { + -- Check for not found + Nothing -> -- Not found, so add an empty export env to the Ifaces map + -- so that we don't look again + let + new_export_env_map = addToFM export_env_map load_mod ([],[]) + new_ifaces = Ifaces this_mod mod_vers_map + new_export_env_map + vers_map decls_map inst_map inst_mods + in + setIfacesRn new_ifaces `thenRn_` + failWithRn new_ifaces (noIfaceErr load_mod) ; + + -- Found and parsed! + Just (ParsedIface _ mod_vers usages exports rd_inst_mods fixs decls insts) -> + + -- LOAD IT INTO Ifaces + mapRn loadExport exports `thenRn` \ avails -> + foldlRn (loadDecl load_mod) (decls_map,vers_map) decls `thenRn` \ (new_decls_map, new_vers_map) -> + foldlRn (loadInstDecl load_mod) inst_map insts `thenRn` \ new_insts_map -> let - return_maybe_decl = return maybe_decl - return_failed msg = return (CachingFail msg) + export_env = (avails, fixs) + + -- Exclude this module from the "special-inst" modules + new_inst_mods = inst_mods `unionLists` (filter (/= this_mod) rd_inst_mods) + + new_ifaces = Ifaces this_mod + (addToFM mod_vers_map load_mod mod_vers) + (addToFM export_env_map load_mod export_env) + new_vers_map + new_decls_map + new_insts_map + new_inst_mods in - case maybe_decl of - CachingAvoided _ -> return_maybe_decl - CachingFail io_msg -> return_failed (ifaceIoErr io_msg rn) - CachingHit if_decl -> - case rn of - WiredInId _ -> return_failed (ifaceLookupWiredErr "value" rn) - WiredInTyCon _ -> return_failed (ifaceLookupWiredErr "type constructor" rn) - RnUnbound _ -> panic "cachedDeclByType:" -- (ppr PprDebug rn) - - RnSyn _ -> return_maybe_decl - RnData _ _ _ -> return_maybe_decl - RnImplicitTyCon _ -> if is_tycon_decl if_decl - then return_maybe_decl - else return_failed (badIfaceLookupErr "type constructor" rn if_decl) - - RnClass _ _ -> return_maybe_decl - RnImplicitClass _ -> if is_class_decl if_decl - then return_maybe_decl - else return_failed (badIfaceLookupErr "class" rn if_decl) - - RnName _ -> return_maybe_decl - RnConstr _ _ -> return_maybe_decl - RnField _ _ -> return_maybe_decl - RnClassOp _ _ -> return_maybe_decl - RnImplicit _ -> if is_val_decl if_decl - then return_maybe_decl - else return_failed (badIfaceLookupErr "value" rn if_decl) + setIfacesRn new_ifaces `thenRn_` + returnRn new_ifaces + } + +loadExport :: ExportItem -> RnMG AvailInfo +loadExport (mod, occ, occs) + = new_name occ `thenRn` \ name -> + mapRn new_name occs `thenRn` \ names -> + returnRn (Avail name names) + where + new_name occ = newGlobalName mod occ + +loadVersion :: Module -> VersionMap -> (OccName,Version) -> RnMG VersionMap +loadVersion mod vers_map (occ, version) + = newGlobalName mod occ `thenRn` \ name -> + returnRn (addToFM vers_map name version) + + +loadDecl :: Module -> (DeclsMap, VersionMap) + -> (Version, RdrNameHsDecl) + -> RnMG (DeclsMap, VersionMap) +loadDecl mod (decls_map, vers_map) (version, decl) + = getDeclBinders new_implicit_name decl `thenRn` \ avail@(Avail name _) -> + returnRn (addListToFM decls_map + [(name,(avail,decl)) | name <- availNames avail], + addToFM vers_map name version + ) where - is_tycon_decl (TypeSig _ _ _) = True - is_tycon_decl (NewTypeSig _ _ _ _) = True - is_tycon_decl (DataSig _ _ _ _ _) = True - is_tycon_decl _ = False - - is_class_decl (ClassSig _ _ _ _) = True - is_class_decl _ = False - - is_val_decl (ValSig _ _ _) = True - is_val_decl (DataSig _ _ _ _ _) = True -- may be a constr or field - is_val_decl (NewTypeSig _ _ _ _) = True -- may be a constr - is_val_decl (ClassSig _ _ _ _) = True -- may be a method - is_val_decl _ = False + new_implicit_name rdr_name loc = newGlobalName mod (rdrNameOcc rdr_name) + +loadInstDecl :: Module -> Bag IfaceInst -> RdrNameInstDecl -> RnMG (Bag IfaceInst) +loadInstDecl mod_name insts decl@(InstDecl inst_ty binds uprags dfun_name src_loc) + = initRnMS emptyRnEnv mod_name InterfaceMode $ + + -- Find out what type constructors and classes are mentioned in the + -- instance declaration. We have to be a bit clever. + -- + -- We want to rename the type so that we can find what + -- (free) type constructors are inside it. But we must *not* thereby + -- put new occurrences into the global pool because otherwise we'll force + -- them all to be loaded. We kill two birds with ones stone by renaming + -- with a fresh occurrence pool. + findOccurrencesRn (rnHsType inst_ty) `thenRn` \ ty_names -> + + returnRn ((ty_names, mod_name, decl) `consBag` insts) \end{code} -\begin{code} -readIface :: FilePath -> Module -> FAST_STRING -> IO (MaybeErr ParsedIface Error) -readIface file modname item - = --hPutStr stderr (" reading "++file++" ("++ _UNPK_ item ++")") >> - TRY_IO (readFile file) >>= \ read_result -> +%******************************************************** +%* * +\subsection{Loading usage information} +%* * +%******************************************************** + +\begin{code} +checkUpToDate :: Module -> RnMG Bool -- True <=> no need to recompile +checkUpToDate mod_name + = findAndReadIface doc_str mod_name `thenRn` \ read_result -> case read_result of - Left err -> return (Failed (cannaeReadErr file err)) - Right contents -> --hPutStr stderr ".." >> - let parsed = parseIface contents in - --hPutStr stderr "..\n" >> - return ( - case parsed of - Failed _ -> parsed - Succeeded p -> Succeeded (init_merge modname p) - ) + Nothing -> -- Old interface file not found, so we'd better bale out + traceRn (ppSep [ppStr "Didnt find old iface", pprModule PprDebug mod_name]) `thenRn_` + returnRn False + + Just (ParsedIface _ _ usages _ _ _ _ _) + -> -- Found it, so now check it + checkModUsage usages where - init_merge this (ParsedIface mod _ v sv us vs exps insts fixes tdefs vdefs idefs prags) - = ParsedIface mod (False, unitBag this) v sv us vs exps insts fixes tdefs vdefs idefs prags -\end{code} + -- Only look in current directory, with suffix .hi + doc_str = ppSep [ppStr "Need usage info from", pprModule PprDebug mod_name] -\begin{code} -rnIfaces :: IfaceCache -- iface cache (mutvar) - -> [Module] -- directly imported modules - -> UniqSupply - -> RnEnv -- defined (in the source) name env - -> RnEnv -- mentioned (in the source) name env - -> RenamedHsModule -- module to extend with iface decls - -> [RnName] -- imported names required (really the - -- same info as in mentioned name env) - -- Also, all the things we may look up - -- later by key (Unique). - -> IO (RenamedHsModule, -- extended module - RnEnv, -- final env (for renaming derivings) - ImplicitEnv, -- implicit names used (for usage info) - (UsagesMap,VersionsMap,[Module]), -- usage info - (Bag Error, Bag Warning)) - -rnIfaces iface_cache imp_mods us - def_env@((dqual, dunqual, dtc_qual, dtc_unqual), dstack) - occ_env@((qual, unqual, tc_qual, tc_unqual), stack) - rn_module@(HsModule modname iface_version exports imports fixities - typedecls typesigs classdecls instdecls instsigs - defdecls binds sigs src_loc) - todo - = {- - pprTrace "rnIfaces:going after:" (ppCat (map (ppr PprDebug) todo)) $ - pprTrace "rnIfaces:qual:" (ppCat [ppBesides[ppPStr m,ppChar '.',ppPStr n] | (n,m) <- keysFM qual]) $ - pprTrace "rnIfaces:unqual:" (ppCat (map ppPStr (keysFM unqual))) $ - pprTrace "rnIfaces:tc_qual:" (ppCat [ppBesides[ppPStr m,ppChar '.',ppPStr n] | (n,m) <- keysFM tc_qual]) $ - pprTrace "rnIfaces:tc_unqual:" (ppCat (map ppPStr (keysFM tc_unqual))) $ - - pprTrace "rnIfaces:dqual:" (ppCat [ppBesides[ppPStr m,ppChar '.',ppPStr n] | (n,m) <- keysFM dqual]) $ - pprTrace "rnIfaces:dunqual:" (ppCat (map ppPStr (keysFM dunqual))) $ - pprTrace "rnIfaces:dtc_qual:" (ppCat [ppBesides[ppPStr m,ppChar '.',ppPStr n] | (n,m) <- keysFM dtc_qual]) $ - pprTrace "rnIfaces:dtc_unqual:"(ppCat (map ppPStr (keysFM dtc_unqual))) $ - -} - - -- do transitive closure to bring in all needed names/defns and insts: - - decls_and_insts todo def_env occ_env empty_return us - >>= \ (((if_typedecls, if_classdecls, if_instdecls, if_sigs), - if_implicits, - if_errs_warns), - if_final_env) -> - - -- finalize what we want to say we learned about the - -- things we used - finalIfaceInfo iface_cache modname if_final_env if_instdecls {-all_imports_used imp_mods-} >>= - \ usage_stuff@(usage_info, version_info, instance_mods) -> - - return (HsModule modname iface_version exports imports fixities - (typedecls ++ if_typedecls) - typesigs - (classdecls ++ if_classdecls) - (instdecls ++ if_instdecls) - instsigs defdecls binds - (sigs ++ if_sigs) - src_loc, - if_final_env, - if_implicits, - usage_stuff, - if_errs_warns) - where - decls_and_insts todo def_env occ_env to_return us - = let - (us1,us2) = splitUniqSupply us - in - do_decls todo -- initial batch of names to process - (def_env, occ_env, us1) -- init stuff down - to_return -- acc results - >>= \ (decls_return, - decls_def_env, - decls_occ_env) -> - - cacheInstModules iface_cache imp_mods >>= \ errs -> - - do_insts decls_def_env decls_occ_env emptyRnEnv emptyFM - (add_errs errs decls_return) us2 - - -------- - do_insts def_env occ_env prev_env done_insts to_return us - | size_tc_env occ_env == size_tc_env prev_env - = return (to_return, occ_env) - - | otherwise - = rnIfaceInstStuff iface_cache modname us1 occ_env done_insts to_return - >>= \ (insts_return, - new_insts, - insts_occ_env, - new_unknowns) -> - - do_decls new_unknowns -- new batch of names to process - (def_env, insts_occ_env, us2) -- init stuff down - insts_return -- acc results - >>= \ (decls_return, - decls_def_env, - decls_occ_env) -> - - do_insts decls_def_env decls_occ_env occ_env new_insts decls_return us3 - where - (us1,us') = splitUniqSupply us - (us2,us3) = splitUniqSupply us' - - size_tc_env ((_, _, qual, unqual), _) - = sizeFM qual + sizeFM unqual - - - do_decls :: [RnName] -- Names we're looking for; we keep adding/deleting - -- from this list; we're done when empty (nothing - -- more needs to be looked for) - -> Go_Down -- see defn below - -> To_Return -- accumulated result - -> IO (To_Return, - RnEnv, -- extended decl env - RnEnv) -- extended occ env - - do_decls to_find@[] down to_return - = return (to_return, defenv down, occenv down) - - do_decls to_find@(n:ns) down to_return - = case (lookup_defd down n) of - Just _ -> -- previous processing must've found the stuff for this name; - -- continue with the rest: - -- pprTrace "do_decls:done:" (ppr PprDebug n) $ - do_decls ns down to_return - - Nothing - | moduleOf (origName "do_decls" n) == modname -> - -- avoid looking in interface for the module being compiled - --pprTrace "do_decls:this module error:" (ppr PprDebug n) $ - do_decls ns down (add_warn (thisModImplicitWarn modname n) to_return) - - | otherwise -> - -- OK, see what the cache has for us... - - cachedDeclByType iface_cache n >>= \ maybe_ans -> - case maybe_ans of - CachingAvoided _ -> - --pprTrace "do_decls:caching avoided:" (ppr PprDebug n) $ - do_decls ns down to_return - - CachingFail err -> -- add the error, but keep going: - --pprTrace "do_decls:cache error:" (ppr PprDebug n) $ - do_decls ns down (add_err err to_return) - - CachingHit iface_decl -> -- something needing renaming! - let - (us1, us2) = splitUniqSupply (uniqsupply down) - in - case (initRn False{-iface-} modname (occenv down) us1 ( - setExtraRn emptyUFM{-no fixities-} $ - rnIfaceDecl iface_decl)) of { - ((if_decl, if_defd, if_implicits), if_errs, if_warns) -> - let - new_unknowns = eltsFM (fst if_implicits) ++ eltsFM (snd if_implicits) - in - {- - pprTrace "do_decls:renamed:" (ppAboves [ppr PprDebug n - , ppCat [ppStr "new unknowns:", interpp'SP PprDebug new_unknowns] - , ppCat [ppStr "defd vals:", interpp'SP PprDebug [n | (_,n) <- fst if_defd] ] - , ppCat [ppStr "defd tcs:", interpp'SP PprDebug [n | (_,n) <- snd if_defd] ] - ]) $ - -} - do_decls (new_unknowns ++ ns) - (add_occs if_defd if_implicits $ - new_uniqsupply us2 down) - (add_decl if_decl $ - add_implicits if_implicits $ - add_errs if_errs $ - add_warns if_warns to_return) - } - ------------ -type Go_Down = (RnEnv, -- stuff we already have defns for; - -- to check quickly if we've already - -- found something for the name under consideration, - -- due to previous processing. - -- It starts off just w/ the defns for - -- the things in this module. - RnEnv, -- occurrence env; this gets added to as - -- we process new iface decls. It includes - -- entries for *all* occurrences, including those - -- for which we have definitions. - UniqSupply -- the obvious - ) - -lookup_defd (def_env, _, _) n - = (if isRnTyConOrClass n then lookupTcRnEnv else lookupRnEnv) def_env - (case (origName "lookup_defd" n) of { OrigName m s -> Qual m s }) - -- this is hack because we are reusing the RnEnv technology - -defenv (def_env, _, _) = def_env -occenv (_, occ_env, _) = occ_env -uniqsupply (_, _, us) = us - -new_uniqsupply us (def_env, occ_env, _) = (def_env, occ_env, us) - -add_occs (val_defds, tc_defds) (val_imps, tc_imps) (def_env, occ_env, us) - = case (extendGlobalRnEnv def_env val_defds tc_defds) of { (new_def_env, def_dups) -> - --(if isEmptyBag def_dups then \x->x else pprTrace "add_occs:" (ppCat [ppr PprDebug n | (n,_,_) <- bagToList def_dups])) $ --- ASSERT(isEmptyBag def_dups) - let - de_orig imps = [ (Qual m n, v) | (OrigName m n, v) <- fmToList imps ] - -- again, this hackery because we are reusing the RnEnv technology +checkModUsage [] = returnRn True -- Yes! Everything is up to date! - val_occs = val_defds ++ de_orig val_imps - tc_occs = tc_defds ++ de_orig tc_imps +checkModUsage ((mod, old_mod_vers, old_local_vers) : rest) + = loadInterface doc_str mod `thenRn` \ ifaces -> + let + Ifaces _ mod_vers_map _ new_vers_map _ _ _ = ifaces + maybe_new_mod_vers = lookupFM mod_vers_map mod + Just new_mod_vers = maybe_new_mod_vers in - case (extendGlobalRnEnv occ_env val_occs tc_occs) of { (new_occ_env, occ_dups) -> + -- If we can't find a version number for the old module then + -- bale out saying things aren't up to date + if not (maybeToBool maybe_new_mod_vers) then + returnRn False + else + + -- If the module version hasn't changed, just move on + if new_mod_vers == old_mod_vers then + traceRn (ppSep [ppStr "Module version unchanged:", pprModule PprDebug mod]) `thenRn_` + checkModUsage rest + else + traceRn (ppSep [ppStr "Module version has changed:", pprModule PprDebug mod]) `thenRn_` --- ASSERT(isEmptyBag occ_dups) --- False because we may get a dup on the name we just shoved in + -- New module version, so check entities inside + checkEntityUsage mod new_vers_map old_local_vers `thenRn` \ up_to_date -> + if up_to_date then + traceRn (ppStr "...but the bits I use havn't.") `thenRn_` + checkModUsage rest -- This one's ok, so check the rest + else + returnRn False -- This one failed, so just bail out now + where + doc_str = ppSep [ppStr "need version info for", pprModule PprDebug mod] - (new_def_env, new_occ_env, us) }} ----------------- -type To_Return = (([RenamedTyDecl], [RenamedClassDecl], [RenamedInstDecl], [RenamedSig]), - ImplicitEnv, -- new names used implicitly - (Bag Error, Bag Warning) - ) - -empty_return :: To_Return -empty_return = (([],[],[],[]), emptyImplicitEnv, (emptyBag,emptyBag)) - -add_decl decl ((tydecls, classdecls, instdecls, sigs), implicit, msgs) - = case decl of - AddedTy t -> ((t:tydecls, classdecls, instdecls, sigs), implicit, msgs) - AddedClass c -> ((tydecls, c:classdecls, instdecls, sigs), implicit, msgs) - AddedSig s -> ((tydecls, classdecls, instdecls, s:sigs), implicit, msgs) - -add_insts is ((tydecls, classdecls, instdecls, sigs), implicit, msgs) - = ((tydecls, classdecls, is ++ instdecls, sigs), implicit, msgs) - -add_implicits (val_imps, tc_imps) (decls, (val_fm, tc_fm), msgs) - = (decls, (val_fm `plusFM` val_imps, tc_fm `plusFM` tc_imps), msgs) - -add_err err (decls,implicit,(errs,warns)) = (decls,implicit,(errs `snocBag` err,warns)) -add_errs ers (decls,implicit,(errs,warns)) = (decls,implicit,(errs `unionBags` ers,warns)) -add_warn wrn (decls,implicit,(errs,warns)) = (decls,implicit,(errs, warns `snocBag` wrn)) -add_warns ws (decls,implicit,(errs,warns)) = (decls,implicit,(errs, warns `unionBags` ws)) +checkEntityUsage mod new_vers_map [] + = returnRn True -- Yes! All up to date! + +checkEntityUsage mod new_vers_map ((occ_name,old_vers) : rest) + = newGlobalName mod occ_name `thenRn` \ name -> + case lookupFM new_vers_map name of + + Nothing -> -- We used it before, but it ain't there now + traceRn (ppSep [ppStr "...and this no longer exported:", ppr PprDebug name]) `thenRn_` + returnRn False + + Just new_vers -> -- It's there, but is it up to date? + if new_vers == old_vers then + -- Up to date, so check the rest + checkEntityUsage mod new_vers_map rest + else + traceRn (ppSep [ppStr "...and this is out of date:", ppr PprDebug name]) `thenRn_` + returnRn False -- Out of date, so bale out \end{code} -\begin{code} -data AddedDecl -- purely local - = AddedTy RenamedTyDecl - | AddedClass RenamedClassDecl - | AddedSig RenamedSig - -rnIfaceDecl :: RdrIfaceDecl - -> RnM_Fixes REAL_WORLD - (AddedDecl, -- the resulting decl to add to the pot - ([(RdrName,RnName)], [(RdrName,RnName)]), - -- new val/tycon-class names that have - -- *been defined* while processing this decl - ImplicitEnv -- new implicit val/tycon-class names that we - -- stumbled into - ) - -rnIfaceDecl (TypeSig tc _ decl) - = rnTyDecl decl `thenRn` \ rn_decl -> - lookupTyCon tc `thenRn` \ rn_tc -> - getImplicitUpRn `thenRn` \ mentioned -> - let - defds = ([], [(tc, rn_tc)]) - implicits = mentioned `sub` defds - in - returnRn (AddedTy rn_decl, defds, implicits) -rnIfaceDecl (NewTypeSig tc dc _ decl) - = rnTyDecl decl `thenRn` \ rn_decl -> - lookupTyCon tc `thenRn` \ rn_tc -> - lookupValue dc `thenRn` \ rn_dc -> - getImplicitUpRn `thenRn` \ mentioned -> - let - defds = ([(dc, rn_dc)], [(tc, rn_tc)]) - implicits = mentioned `sub` defds - in - returnRn (AddedTy rn_decl, defds, implicits) - -rnIfaceDecl (DataSig tc dcs fcs _ decl) - = rnTyDecl decl `thenRn` \ rn_decl -> - lookupTyCon tc `thenRn` \ rn_tc -> - mapRn lookupValue dcs `thenRn` \ rn_dcs -> - mapRn lookupValue fcs `thenRn` \ rn_fcs -> - getImplicitUpRn `thenRn` \ mentioned -> - let - defds = (zip dcs rn_dcs ++ zip fcs rn_fcs , [(tc, rn_tc)]) - implicits = mentioned `sub` defds - in - returnRn (AddedTy rn_decl, defds, implicits) +%********************************************************* +%* * +\subsection{Getting in a declaration} +%* * +%********************************************************* -rnIfaceDecl (ClassSig clas ops _ decl) - = rnClassDecl decl `thenRn` \ rn_decl -> - lookupClass clas `thenRn` \ rn_clas -> - mapRn (lookupClassOp rn_clas) ops `thenRn` \ rn_ops -> - getImplicitUpRn `thenRn` \ mentioned -> - let - defds = (ops `zip` rn_ops, [(clas, rn_clas)]) - implicits = mentioned `sub` defds - in - returnRn (AddedClass rn_decl, defds, implicits) - -rnIfaceDecl (ValSig f src_loc ty) - -- should rename_sig in RnBinds be used here? ToDo - = lookupValue f `thenRn` \ rn_f -> - -- pprTrace "rnIfaceDecl:ValSig:" (ppr PprDebug ty) $ - rnPolyType nullTyVarNamesEnv ty `thenRn` \ rn_ty -> - getImplicitUpRn `thenRn` \ mentioned -> - let - defds = ([(f, rn_f)], []) - implicits = mentioned `sub` defds - in - returnRn (AddedSig (Sig rn_f rn_ty noGenPragmas src_loc), defds, implicits) +\begin{code} +getDecl :: Name -> RnMG (AvailInfo, RdrNameHsDecl) +getDecl name + = traceRn doc_str `thenRn_` + loadInterface doc_str mod `thenRn` \ (Ifaces _ _ _ _ decls_map _ _) -> + case lookupFM decls_map name of ----- -sub :: ImplicitEnv -> ([(RdrName,RnName)], [(RdrName,RnName)]) -> ImplicitEnv + Just avail_w_decl -> returnRn avail_w_decl -sub (val_ment, tc_ment) (val_defds, tc_defds) - = (delListFromFM val_ment (map (qualToOrigName . fst) val_defds), - delListFromFM tc_ment (map (qualToOrigName . fst) tc_defds)) + Nothing -> -- Can happen legitimately for "Optional" occurrences + returnRn (NotAvailable, ValD EmptyBinds) + where + (mod,_) = modAndOcc name + doc_str = ppSep [ppStr "Need decl for", ppr PprDebug name] \end{code} -% ------------------------------ +@getWiredInDecl@ maps a wired-in @Name@ to what it makes available. +It behaves exactly as if the wired in decl were actually in an interface file. +Specifically, + * if the wired-in name is a data type constructor or a data constructor, + it brings in the type constructor and all the data constructors; and + marks as "occurrences" any free vars of the data con. -@cacheInstModules@: cache instance modules specified in imports + * similarly for synonum type constructor -\begin{code} -cacheInstModules :: IfaceCache -> [Module] -> IO (Bag Error) + * if the wired-in name is another wired-in Id, it marks as "occurrences" + the free vars of the Id's type. -cacheInstModules iface_cache@(IfaceCache _ _ iface_var) imp_mods - = readVar iface_var ST_THEN \ (iface_fm, _, _) -> - let - imp_ifaces = [ iface | Just iface <- map (lookupFM iface_fm) imp_mods ] - (imp_imods, _) = removeDups cmpPString (bagToList (unionManyBags (map get_ims imp_ifaces))) - get_ims (ParsedIface _ _ _ _ _ _ _ ims _ _ _ _ _) = ims - in - --pprTrace "cacheInstModules:" (ppCat (map ppPStr imp_imods)) $ - accumulate (map (cachedIface iface_cache False SLIT("instance_modules")) imp_imods) >>= \ err_or_ifaces -> + * it loads the interface file for the wired-in thing for the + sole purpose of making sure that its instance declarations are available - -- Sanity Check: - -- Assert that instance modules given by direct imports contains - -- instance modules extracted from all visited modules +All this is necessary so that we know all types that are "in play", so +that we know just what instances to bring into scope. + +\begin{code} +getWiredInDecl :: Name -> RnMG AvailInfo +getWiredInDecl name + = -- Force in the home module in case it has instance decls for + -- the thing we are interested in + (if mod == gHC__ then + returnRn () -- Mini hack; GHC is guaranteed not to have + -- instance decls, so it's a waste of time + -- to read it + else + loadInterface doc_str mod `thenRn_` + returnRn () + ) `thenRn_` + + if (maybeToBool maybe_wired_in_tycon) then + get_wired_tycon the_tycon + else -- Must be a wired-in-Id + if (isDataCon the_id) then -- ... a wired-in data constructor + get_wired_tycon (dataConTyCon the_id) + else -- ... a wired-in non data-constructor + get_wired_id the_id + where + doc_str = ppSep [ppStr "Need home module for wired in thing", ppr PprDebug name] + (mod,_) = modAndOcc name + maybe_wired_in_tycon = maybeWiredInTyConName name + maybe_wired_in_id = maybeWiredInIdName name + Just the_tycon = maybe_wired_in_tycon + Just the_id = maybe_wired_in_id + +get_wired_id id + = addImplicitOccsRn (nameSetToList id_mentioned) `thenRn_` + returnRn (Avail (getName id) []) + where + id_mentioned = namesOfType (idType id) - readVar iface_var ST_THEN \ (all_iface_fm, _, _) -> - let - all_ifaces = eltsFM all_iface_fm - (all_imods, _) = removeDups cmpPString (bagToList (unionManyBags (map get_ims (all_ifaces)))) - in - ASSERT(sortLt (<) imp_imods == sortLt (<) all_imods) +get_wired_tycon tycon + | isSynTyCon tycon + = addImplicitOccsRn (nameSetToList mentioned) `thenRn_` + returnRn (Avail (getName tycon) []) + where + (tyvars,ty) = getSynTyConDefn tycon + mentioned = namesOfType ty `minusNameSet` mkNameSet (map getName tyvars) - return (bag_errs err_or_ifaces) +get_wired_tycon tycon + | otherwise -- data or newtype + = addImplicitOccsRn (nameSetToList mentioned) `thenRn_` + returnRn (Avail (getName tycon) (map getName data_cons)) where - bag_errs [] = emptyBag - bag_errs (Failed err :rest) = err `consBag` bag_errs rest - bag_errs (Succeeded _:rest) = bag_errs rest + data_cons = tyConDataCons tycon + mentioned = foldr (unionNameSets . namesOfType . idType) emptyNameSet data_cons \end{code} -@rnIfaceInstStuff@: Deal with instance declarations from interface files. +%********************************************************* +%* * +\subsection{Getting other stuff} +%* * +%********************************************************* \begin{code} -type InstanceEnv = FiniteMap (OrigName, OrigName) Int - -rnIfaceInstStuff - :: IfaceCache -- all about ifaces we've read - -> Module - -> UniqSupply - -> RnEnv -- current occ env - -> InstanceEnv -- instances for these tycon/class pairs done - -> To_Return - -> IO (To_Return, - InstanceEnv, -- extended instance env - RnEnv, -- final occ env - [RnName]) -- new unknown names - -rnIfaceInstStuff iface_cache@(IfaceCache _ _ iface_var) modname us occ_env done_inst_env to_return - = -- all the instance decls we might even want to consider - -- are in the ParsedIfaces that are in our cache - - readVar iface_var ST_THEN \ (_, orig_iface_fm, _) -> - let - all_ifaces = eltsFM orig_iface_fm - all_insts = concat (map get_insts all_ifaces) - interesting_insts = filter want_inst all_insts +getInterfaceExports :: Module -> RnMG (Avails, [(OccName,Fixity)]) +getInterfaceExports mod + = loadInterface doc_str mod `thenRn` \ (Ifaces _ _ export_envs _ _ _ _) -> + case lookupFM export_envs mod of + Nothing -> -- Not there; it must be that the interface file wasn't found; + -- the error will have been reported already. + -- (Actually loadInterface should put the empty export env in there + -- anyway, but this does no harm.) + returnRn ([],[]) + + Just stuff -> returnRn stuff + where + doc_str = ppSep [pprModule PprDebug mod, ppStr "is directly imported"] - -- Sanity Check: - -- Assert that there are no more instances for the done instances - claim_done = filter is_done_inst all_insts - claim_done_env = foldr add_done_inst emptyFM claim_done +getImportedInstDecls :: RnMG [IfaceInst] +getImportedInstDecls + = -- First load any special-instance modules that aren't aready loaded + getSpecialInstModules `thenRn` \ inst_mods -> + mapRn load_it inst_mods `thenRn_` - has_val fm (k,i) = case lookupFM fm k of { Nothing -> False; Just v -> i == v } + -- Now we're ready to grab the instance declarations + getIfacesRn `thenRn` \ ifaces -> + let + Ifaces _ _ _ _ _ insts _ = ifaces in - {- - pprTrace "all_insts:\n" (ppr_insts (bagToList all_insts)) $ - pprTrace "interesting_insts:\n" (ppr_insts interesting_insts) $ - -} - ASSERT(sizeFM done_inst_env == sizeFM claim_done_env) - ASSERT(all (has_val claim_done_env) (fmToList done_inst_env)) - - case (initRn False{-iface-} modname occ_env us ( - setExtraRn emptyUFM{-no fixities-} $ - mapRn rnIfaceInst interesting_insts `thenRn` \ insts -> - getImplicitUpRn `thenRn` \ implicits -> - returnRn (insts, implicits))) of { - ((if_insts, if_implicits), if_errs, if_warns) -> - - return (add_insts if_insts $ - add_implicits if_implicits $ - add_errs if_errs $ - add_warns if_warns to_return, - foldr add_done_inst done_inst_env interesting_insts, - add_imp_occs if_implicits occ_env, - eltsFM (fst if_implicits) ++ eltsFM (snd if_implicits)) - } + returnRn (bagToList insts) where - get_insts (ParsedIface imod _ _ _ _ _ _ _ _ _ _ insts _) = [(imod, inst) | inst <- bagToList insts] - - tycon_class clas tycon = (qualToOrigName clas, qualToOrigName tycon) - - add_done_inst (_, InstSig clas tycon _ _) inst_env - = addToFM_C (+) inst_env (tycon_class clas tycon) 1 - - is_done_inst (_, InstSig clas tycon _ _) - = maybeToBool (lookupFM done_inst_env (tycon_class clas tycon)) - - add_imp_occs (val_imps, tc_imps) occ_env - = case (extendGlobalRnEnv occ_env (de_orig val_imps) (de_orig tc_imps)) of - (ext_occ_env, occ_dups) -> ASSERT(isEmptyBag occ_dups) - ext_occ_env - where - de_orig imps = [ (Qual m n, v) | (OrigName m n, v) <- fmToList imps ] - -- again, this hackery because we are reusing the RnEnv technology - - want_inst i@(imod, InstSig clas tycon _ _) - = -- it's a "good instance" (one to hang onto) if we have a - -- chance of referring to *both* the class and tycon later on ... - --pprTrace "want_inst:" (ppCat [ppr PprDebug clas, ppr PprDebug tycon, ppr PprDebug (mentionable tycon), ppr PprDebug (mentionable clas), ppr PprDebug(is_done_inst i)]) $ - mentionable tycon && mentionable clas && not (is_done_inst i) - where - mentionable nm - = case lookupTcRnEnv occ_env nm of - Just _ -> True - Nothing -> -- maybe it's builtin - let orig = qualToOrigName nm in - case (lookupFM builtinTcNamesMap orig) of - Just _ -> True - Nothing -> maybeToBool (lookupFM builtinKeysMap orig) + load_it mod = loadInterface (doc_str mod) mod + doc_str mod = ppSep [pprModule PprDebug mod, ppStr "is a special-instance module"] + +getSpecialInstModules :: RnMG [Module] +getSpecialInstModules + = getIfacesRn `thenRn` \ ifaces -> + let + Ifaces _ _ _ _ _ _ inst_mods = ifaces + in + returnRn inst_mods \end{code} \begin{code} -rnIfaceInst :: (Module, RdrIfaceInst) -> RnM_Fixes REAL_WORLD RenamedInstDecl +getImportVersions :: [AvailInfo] -- Imported avails + -> RnMG (VersionInfo Name) -- Version info for these names -rnIfaceInst (imod, InstSig _ _ _ inst_decl) = rnInstDecl (inst_decl imod) +getImportVersions imported_avails + = getIfacesRn `thenRn` \ ifaces -> + let + Ifaces _ mod_versions_map _ version_map _ _ _ = ifaces + + -- import_versions is harder: we have to group together all the things imported + -- from a particular module. We do this with yet another finite map + + mv_map :: FiniteMap Module [LocalVersion Name] + mv_map = foldl add_mv emptyFM imported_avails + add_mv mv_map (Avail name _) + | isWiredInName name = mv_map -- Don't record versions for wired-in names + | otherwise = case lookupFM mv_map mod of + Just versions -> addToFM mv_map mod ((name,version):versions) + Nothing -> addToFM mv_map mod [(name,version)] + where + (mod,_) = modAndOcc name + version = case lookupFM version_map name of + Just v -> v + Nothing -> pprPanic "getVersionInfo:" (ppr PprDebug name) + + import_versions = [ (mod, expectJust "import_versions" (lookupFM mod_versions_map mod), local_versions) + | (mod, local_versions) <- fmToList mv_map + ] + + -- Question: should we filter the builtins out of import_versions? + in + returnRn import_versions \end{code} +%********************************************************* +%* * +\subsection{Getting binders out of a declaration} +%* * +%********************************************************* + +@getDeclBinders@ returns the names for a @RdrNameHsDecl@. +It's used for both source code (from @availsFromDecl@) and interface files +(from @loadDecl@). + +It doesn't deal with source-code specific things: ValD, DefD. They +are handled by the sourc-code specific stuff in RnNames. + \begin{code} -type BigMaps = (FiniteMap Module Version, -- module-version map - FiniteMap (FAST_STRING,Module) Version) -- ordinary version map - -finalIfaceInfo :: - IfaceCache -- iface cache - -> Module -- this module's name - -> RnEnv - -> [RenamedInstDecl] --- -> [RnName] -- all imported names required --- -> [Module] -- directly imported modules - -> IO (UsagesMap, - VersionsMap, -- info about version numbers - [Module]) -- special instance modules - -finalIfaceInfo iface_cache@(IfaceCache _ _ iface_var) modname if_final_env@((qual, unqual, tc_qual, tc_unqual), stack) if_instdecls - = --- pprTrace "usageIf:qual:" (ppCat [ppBesides[ppPStr m,ppChar '.',ppPStr n] | (n,m) <- keysFM qual]) $ --- pprTrace "usageIf:unqual:" (ppCat (map ppPStr (keysFM unqual))) $ --- pprTrace "usageIf:tc_qual:" (ppCat [ppBesides[ppPStr m,ppChar '.',ppPStr n] | (n,m) <- keysFM tc_qual]) $ --- pprTrace "usageIf:tc_unqual:" (ppCat (map ppPStr (keysFM tc_unqual))) $ - readVar iface_var ST_THEN \ (_, orig_iface_fm, _) -> - let - all_ifaces = eltsFM orig_iface_fm - -- all the interfaces we have looked at +getDeclBinders :: (RdrName -> SrcLoc -> RnMG Name) -- New-name function + -> RdrNameHsDecl + -> RnMG AvailInfo - big_maps - -- combine all the version maps we have seen into maps to - -- (a) lookup a module-version number, lookup an entity's - -- individual version number - = foldr mk_map (emptyFM,emptyFM) all_ifaces +getDeclBinders new_name (TyD (TyData _ tycon _ condecls _ _ src_loc)) + = new_name tycon src_loc `thenRn` \ tycon_name -> + getConFieldNames new_name condecls `thenRn` \ sub_names -> + returnRn (Avail tycon_name sub_names) - val_stuff@(val_usages, val_versions) - = foldFM (process_item big_maps) (emptyFM, emptyFM){-init-} qual +getDeclBinders new_name (TyD (TyNew _ tycon _ (NewConDecl con _ con_loc) _ _ src_loc)) + = new_name tycon src_loc `thenRn` \ tycon_name -> + new_name con src_loc `thenRn` \ con_name -> + returnRn (Avail tycon_name [con_name]) - (all_usages, all_versions) - = foldFM (process_item big_maps) val_stuff{-keep going-} tc_qual - in - return (all_usages, all_versions, []) +getDeclBinders new_name (TyD (TySynonym tycon _ _ src_loc)) + = new_name tycon src_loc `thenRn` \ tycon_name -> + returnRn (Avail tycon_name []) + +getDeclBinders new_name (ClD (ClassDecl _ cname _ sigs _ _ src_loc)) + = new_name cname src_loc `thenRn` \ class_name -> + mapRn (getClassOpNames new_name) sigs `thenRn` \ sub_names -> + returnRn (Avail class_name sub_names) + +getDeclBinders new_name (SigD (IfaceSig var ty prags src_loc)) + = new_name var src_loc `thenRn` \ var_name -> + returnRn (Avail var_name []) + +getDeclBinders new_name (DefD _) = returnRn NotAvailable +getDeclBinders new_name (InstD _) = returnRn NotAvailable + +---------------- +getConFieldNames new_name (ConDecl con _ src_loc : rest) + = new_name con src_loc `thenRn` \ n -> + getConFieldNames new_name rest `thenRn` \ ns -> + returnRn (n:ns) + +getConFieldNames new_name (NewConDecl con _ src_loc : rest) + = new_name con src_loc `thenRn` \ n -> + getConFieldNames new_name rest `thenRn` \ ns -> + returnRn (n:ns) + +getConFieldNames new_name (ConOpDecl _ con _ src_loc : rest) + = new_name con src_loc `thenRn` \ n -> + getConFieldNames new_name rest `thenRn` \ ns -> + returnRn (n:ns) + +getConFieldNames new_name (RecConDecl con fielddecls src_loc : rest) + = mapRn (\n -> new_name n src_loc) (con:fields) `thenRn` \ cfs -> + getConFieldNames new_name rest `thenRn` \ ns -> + returnRn (cfs ++ ns) where - mk_map (ParsedIface m _ mv _ _ vers _ _ _ _ _ _ _) (mv_map, ver_map) - = (addToFM mv_map m mv, -- add this module - addListToFM ver_map [ ((n,m), v) | (n,v) <- fmToList vers ]) - - ----------------------- - process_item :: BigMaps - -> (FAST_STRING,Module) -> RnName -- RnEnv (QualNames) components - -> (UsagesMap, VersionsMap) -- input - -> (UsagesMap, VersionsMap) -- output - - process_item (big_mv_map, big_version_map) key@(n,m) rn as_before@(usages, versions) - | irrelevant rn - = as_before - | m == modname -- this module => add to "versions" - = (usages, addToFM versions n 1{-stub-}) - | otherwise -- from another module => add to "usages" - = case (add_to_usages usages key) of - Nothing -> as_before - Just new_usages -> (new_usages, versions) - where - add_to_usages usages key@(n,m) - = case (lookupFM big_mv_map m) of - Nothing -> Nothing - Just mv -> - case (lookupFM big_version_map key) of - Nothing -> Nothing - Just kv -> - Just $ addToFM usages m ( - case (lookupFM usages m) of - Nothing -> -- nothing for this module yet... - (mv, unitFM n kv) - - Just (mversion, mstuff) -> -- the "new" stuff will shadow the old - ASSERT(mversion == mv) - (mversion, addToFM mstuff n kv) - ) - - irrelevant (RnConstr _ _) = True -- We don't report these in their - irrelevant (RnField _ _) = True -- own right in usages/etc. - irrelevant (RnClassOp _ _) = True - irrelevant (RnImplicit n) = isLexCon (nameOf (origName "irrelevant" n)) -- really a RnConstr - irrelevant _ = False + fields = concat (map fst fielddecls) + +getConFieldNames new_name [] = returnRn [] +getClassOpNames new_name (ClassOpSig op _ _ src_loc) = new_name op src_loc \end{code} +%********************************************************* +%* * +\subsection{Reading an interface file} +%* * +%********************************************************* + \begin{code} -thisModImplicitWarn mod n sty - = ppBesides [ppPStr SLIT("An interface has an implicit need of "), ppr sty n, ppPStr SLIT("; assuming this module will provide it.")] +findAndReadIface :: Pretty -> Module -> RnMG (Maybe ParsedIface) + -- Nothing <=> file not found, or unreadable, or illegible + -- Just x <=> successfully found and parsed +findAndReadIface doc_str mod + = traceRn trace_msg `thenRn_` + getSearchPathRn `thenRn` \ dirs -> + try dirs dirs + where + trace_msg = ppHang (ppBesides [ppStr "Reading interface for ", + pprModule PprDebug mod, ppSemi]) + 4 (ppBesides [ppStr "reason: ", doc_str]) + + try all_dirs [] = traceRn (ppStr "...failed") `thenRn_` + returnRn Nothing + + try all_dirs (dir:dirs) + = readIface file_path `thenRn` \ read_result -> + case read_result of + Nothing -> try all_dirs dirs + Just iface -> traceRn (ppStr "...done") `thenRn_` + returnRn (Just iface) + where + file_path = dir ++ "/" ++ moduleString mod ++ ".hi" +\end{code} -noIfaceErr mod sty - = ppCat [ppPStr SLIT("Could not find interface for:"), ppPStr mod] +@readIface@ trys just one file. -noOrigIfaceErr mod sty - = ppCat [ppPStr SLIT("Could not find original interface for:"), ppPStr mod] +\begin{code} +readIface :: String -> RnMG (Maybe ParsedIface) + -- Nothing <=> file not found, or unreadable, or illegible + -- Just x <=> successfully found and parsed +readIface file_path + = ioToRnMG (readFile file_path) `thenRn` \ read_result -> + case read_result of + Right contents -> case parseIface contents of + Failed err -> failWithRn Nothing err + Succeeded iface -> returnRn (Just iface) -noDeclInIfaceErr mod str sty - = ppBesides [ppPStr SLIT("Could not find interface declaration of: "), - ppPStr mod, ppStr ".", ppPStr str] + Left (NoSuchThing _) -> returnRn Nothing -cannaeReadErr file err sty - = ppBesides [ppPStr SLIT("Failed in reading file: "), ppStr file, ppStr "; error=", ppStr (show err)] + Left err -> failWithRn Nothing + (cannaeReadFile file_path err) + +\end{code} + +mkSearchPath takes a string consisting of a colon-separated list of directories, and turns it into +a list of directories. For example: + + mkSearchPath "foo:.:baz" = ["foo", ".", "baz"] + +\begin{code} +mkSearchPath :: Maybe String -> SearchPath +mkSearchPath Nothing = ["."] +mkSearchPath (Just s) + = go s + where + go "" = [] + go s = first : go (drop 1 rest) + where + (first,rest) = span (/= ':') s +\end{code} -ifaceLookupWiredErr msg n sty - = ppBesides [ppPStr SLIT("Why am I looking up a wired-in "), ppStr msg, ppChar ':', ppr sty n] +%********************************************************* +%* * +\subsection{Errors} +%* * +%********************************************************* -badIfaceLookupErr msg name decl sty - = ppBesides [ppPStr SLIT("Expected a "), ppStr msg, ppStr " declaration, but got this: ???"] +\begin{code} +noIfaceErr mod sty + = ppBesides [ppStr "Could not find interface for ", ppQuote (pprModule sty mod)] +-- , ppStr " in"]) 4 (ppAboves (map ppStr dirs)) -ifaceIoErr io_msg rn sty - = ppBesides [io_msg sty, ppStr "; looking for: ", ppr sty rn] +cannaeReadFile file err sty + = ppBesides [ppPStr SLIT("Failed in reading file: "), ppStr file, ppStr "; error=", ppStr (show err)] \end{code} |