#include "HsVersions.h"
module RnIfaces (
- findHiFiles,
- cachedIface,
- cachedDecl,
- readIface,
- rnIfaces,
- IfaceCache(..)
+ getInterfaceExports,
+ getImportedInstDecls,
+ getSpecialInstModules,
+ getDecl, getWiredInDecl,
+ getImportVersions,
+
+ checkUpToDate,
+
+ getDeclBinders,
+ mkSearchPath
) where
-import Ubiq
+IMP_Ubiq()
-import LibDirectory
-import PreludeGlaST ( thenPrimIO, seqPrimIO, readVar, writeVar, MutableVar(..) )
-import HsSyn
+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
-import RnHsSyn
-
+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 ( RnEnv(..), emptyRnEnv, lookupRnEnv, lookupTcRnEnv, extendGlobalRnEnv )
import ParseIface ( parseIface )
-import ParseUtils ( ParsedIface(..), RdrIfaceDecl(..), RdrIfaceInst(..),
- VersionsMap(..), UsagesMap(..)
- )
-import Bag ( emptyBag, consBag, snocBag, unionBags, unionManyBags, isEmptyBag, bagToList )
-import CmdLineOpts ( opt_HiSuffix, opt_SysHiSuffix )
-import ErrUtils ( Error(..), Warning(..) )
-import FiniteMap ( emptyFM, lookupFM, addToFM, addToFM_C, plusFM, eltsFM,
- fmToList, delListFromFM, sizeFM, keysFM{-ToDo:rm-}
- )
-import Maybes ( maybeToBool )
-import Name ( moduleNamePair, origName, isRdrLexCon,
- RdrName(..){-instance NamedThing-}
- )
-import PprStyle -- ToDo:rm
-import Outputable -- ToDo:rm
-import PrelInfo ( builtinNameInfo )
+import ErrUtils ( SYN_IE(Error), SYN_IE(Warning) )
+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 Maybes ( MaybeErr(..) )
-import UniqFM ( emptyUFM )
-import UniqSupply ( splitUniqSupply )
-import Util ( sortLt, removeDups, cmpPString, startsWith,
- panic, pprPanic, assertPanic, pprTrace{-ToDo:rm-} )
+import PprStyle ( PprStyle(..) )
+import Util ( pprPanic )
\end{code}
-\begin{code}
-type ModuleToIfaceContents = FiniteMap Module ParsedIface
-type ModuleToIfaceFilePath = FiniteMap Module FilePath
-type IfaceCache
- = MutableVar _RealWorld (ModuleToIfaceContents,
- ModuleToIfaceFilePath)
-\end{code}
-*********************************************************
-* *
-\subsection{Looking for interface files}
-* *
-*********************************************************
+%*********************************************************
+%* *
+\subsection{Loading a new interface file}
+%* *
+%*********************************************************
-Return a mapping from module-name to
-absolute-filename-for-that-interface.
\begin{code}
-findHiFiles :: [FilePath] -> [FilePath] -> IO (FiniteMap Module FilePath)
+loadInterface :: Pretty -> Module -> RnMG Ifaces
+loadInterface doc_str load_mod
+ = getIfacesRn `thenRn` \ ifaces ->
+ let
+ Ifaces this_mod mod_vers_map export_env_map vers_map decls_map inst_map inst_mods = ifaces
+ in
+ -- 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
+ 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
+ setIfacesRn new_ifaces `thenRn_`
+ returnRn new_ifaces
+ }
-findHiFiles dirs sysdirs
- = hPutStr stderr " findHiFiles " >>
- do_dirs emptyFM (dirs ++ sysdirs) >>= \ result ->
- hPutStr stderr " done\n" >>
- return result
+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
- do_dirs env [] = return env
- do_dirs env (dir:dirs)
- = do_dir env dir >>= \ new_env ->
- do_dirs new_env dirs
- -------
- do_dir env dir
- = hPutStr stderr "D" >>
- getDirectoryContents dir >>= \ entries ->
- do_entries env entries
- where
- do_entries env [] = return env
- do_entries env (e:es)
- = do_entry env e >>= \ new_env ->
- do_entries new_env es
- -------
- do_entry env e
- = case (acceptable_hi (reverse e)) of
- Nothing -> --trace ("Deemed uncool:"++e) $
- hPutStr stderr "." >>
- return env
- Just mod ->
- let
- pmod = _PK_ mod
- in
- case (lookupFM env pmod) of
- Nothing -> --trace ("Adding "++mod++" -> "++e) $
- hPutStr stderr "!" >>
- return (addToFM env pmod (dir ++ '/':e))
- -- ToDo: use DIR_SEP, not /
-
- Just xx -> ( if de_dot xx /= e then trace ("Already mapped!! "++mod++" -> "++xx++"; ignoring:"++e) else id) $
- hPutStr stderr "." >>
- return env
- -------
- acceptable_hi rev_e -- looking at pathname *backwards*
- = case (startsWith (reverse opt_HiSuffix) rev_e) of
- Nothing -> Nothing
- Just xs -> plausible_modname xs{-reversed-}
-
- -------
- de_dot ('.' : '/' : xs) = xs
- de_dot xs = xs
-
- -------
- plausible_modname rev_e
- = let
- cand = reverse (takeWhile is_modname_char rev_e)
- in
- if null cand || not (isUpper (head cand))
- then Nothing
- else Just cand
- where
- is_modname_char c = isAlphanum c || c == '_'
+ 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}
-*********************************************************
-* *
-\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).
+%********************************************************
+%* *
+\subsection{Loading usage information}
+%* *
+%********************************************************
\begin{code}
-cachedIface :: IfaceCache
- -> Module
- -> IO (MaybeErr ParsedIface Error)
-
-cachedIface iface_cache mod
- = readVar iface_cache `thenPrimIO` \ (iface_fm, file_fm) ->
-
- case (lookupFM iface_fm mod) of
- Just iface -> return (Succeeded iface)
- Nothing ->
- case (lookupFM file_fm mod) of
- Nothing -> return (Failed (noIfaceErr mod))
- Just file ->
- readIface file mod >>= \ 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 mod iface
- in
- writeVar iface_cache (iface_fm', file_fm) `seqPrimIO`
- return (Succeeded iface)
-
-----------
-cachedDecl :: IfaceCache
- -> Bool -- True <=> tycon or class name
- -> RdrName
- -> IO (MaybeErr RdrIfaceDecl Error)
-
--- ToDo: this is where the check for Prelude.map being
--- located in PreludeList.map should be done ...
-
-cachedDecl iface_cache class_or_tycon orig
- = cachedIface iface_cache mod >>= \ maybe_iface ->
- case maybe_iface of
- Failed err -> return (Failed err)
- Succeeded (ParsedIface _ _ _ _ _ exps _ _ tdefs vdefs _ _) ->
- case (lookupFM (if class_or_tycon then tdefs else vdefs) str) of
- Just decl -> return (Succeeded decl)
- Nothing -> return (Failed (noDeclInIfaceErr mod str))
+checkUpToDate :: Module -> RnMG Bool -- True <=> no need to recompile
+checkUpToDate mod_name
+ = findAndReadIface doc_str mod_name `thenRn` \ read_result ->
+ case read_result of
+ 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
- (mod, str) = moduleNamePair orig
-
-----------
-cachedDeclByType :: IfaceCache
- -> RnName{-NB: diff type than cachedDecl -}
- -> IO (MaybeErr RdrIfaceDecl Error)
-
-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 rn) >>= \ maybe_decl ->
+ -- Only look in current directory, with suffix .hi
+ doc_str = ppSep [ppStr "Need usage info from", pprModule PprDebug mod_name]
+
+
+checkModUsage [] = returnRn True -- Yes! Everything is up to date!
+
+checkModUsage ((mod, old_mod_vers, old_local_vers) : rest)
+ = loadInterface doc_str mod `thenRn` \ ifaces ->
let
- return_maybe_decl = return maybe_decl
- return_failed msg = return (Failed msg)
+ 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 maybe_decl of
- Failed _ -> return_maybe_decl
- Succeeded if_decl ->
- case rn of
- WiredInId _ -> return_failed (ifaceLookupWiredErr "value" rn)
- WiredInTyCon _ -> return_failed (ifaceLookupWiredErr "type constructor" rn)
- RnUnbound _ -> pprPanic "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)
+ -- 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_`
+
+ -- 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
- 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
-\end{code}
+ doc_str = ppSep [ppStr "need version info for", pprModule PprDebug mod]
-\begin{code}
-readIface :: FilePath -> Module
- -> IO (MaybeErr ParsedIface Error)
-readIface file mod
- = hPutStr stderr (" reading "++file) >>
- readFile file `thenPrimIO` \ read_result ->
- case read_result of
- Left err -> return (Failed (cannaeReadErr file err))
- Right contents -> hPutStr stderr " parsing" >>
- let parsed = parseIface contents in
- hPutStr stderr " done\n" >>
- return parsed
+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}
+%*********************************************************
+%* *
+\subsection{Getting in a declaration}
+%* *
+%*********************************************************
+
\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 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
- = 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
- where
- (us1,us2) = splitUniqSupply us
-
- 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 -> -- OK, see what the cache has for us...
-
- cachedDeclByType iface_cache n >>= \ maybe_ans ->
- case maybe_ans of
- Failed err -> -- add the error, but keep going:
- -- pprTrace "do_decls:cache error:" (ppr PprDebug n) $
- do_decls ns down (add_err err to_return)
-
- Succeeded 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
- | isRnTyConOrClass n
- = lookupTcRnEnv def_env (origName n)
- | otherwise
- = lookupRnEnv def_env (origName n)
-
-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) ->
- ASSERT(isEmptyBag def_dups)
- let
- val_occs = val_defds ++ fmToList val_imps
- tc_occs = tc_defds ++ fmToList tc_imps
- in
- case (extendGlobalRnEnv occ_env val_occs tc_occs) of { (new_occ_env, occ_dups) ->
+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
--- ASSERT(isEmptyBag occ_dups)
--- False because we may get a dup on the name we just shoved in
+ Just avail_w_decl -> returnRn avail_w_decl
- (new_def_env, new_occ_env, us) }}
+ 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}
-----------------
-type To_Return = (([RenamedTyDecl], [RenamedClassDecl], [RenamedInstDecl], [RenamedSig]),
- ImplicitEnv, -- new names used implicitly
- (Bag Error, Bag Warning)
- )
+@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.
+
+ * similarly for synonum type constructor
-empty_return :: To_Return
-empty_return = (([],[],[],[]), emptyImplicitEnv, (emptyBag,emptyBag))
+ * if the wired-in name is another wired-in Id, it marks as "occurrences"
+ the free vars of the Id's type.
-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)
+ * it loads the interface file for the wired-in thing for the
+ sole purpose of making sure that its instance declarations are available
-add_insts is ((tydecls, classdecls, instdecls, sigs), implicit, msgs)
- = ((tydecls, classdecls, is ++ instdecls, sigs), implicit, msgs)
+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)
-add_implicits (val_imps, tc_imps) (decls, (val_fm, tc_fm), msgs)
- = (decls, (val_fm `plusFM` val_imps, tc_fm `plusFM` tc_imps), msgs)
+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)
-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_warns ws (decls,implicit,(errs,warns)) = (decls,implicit,(errs, warns `unionBags` ws))
+get_wired_tycon tycon
+ | otherwise -- data or newtype
+ = addImplicitOccsRn (nameSetToList mentioned) `thenRn_`
+ returnRn (Avail (getName tycon) (map getName data_cons))
+ where
+ data_cons = tyConDataCons tycon
+ mentioned = foldr (unionNameSets . namesOfType . idType) emptyNameSet data_cons
\end{code}
+
+%*********************************************************
+%* *
+\subsection{Getting other stuff}
+%* *
+%*********************************************************
+
\begin{code}
-data AddedDecl -- purely local
- = AddedTy RenamedTyDecl
- | AddedClass RenamedClassDecl
- | AddedSig RenamedSig
-
-rnIfaceDecl :: RdrIfaceDecl
- -> RnM_Fixes _RealWorld
- (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)
+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"]
-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)
-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 ->
+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_`
+
+ -- Now we're ready to grab the instance declarations
+ getIfacesRn `thenRn` \ ifaces ->
let
- defds = (ops `zip` rn_ops, [(clas, rn_clas)])
- implicits = mentioned `sub` defds
+ Ifaces _ _ _ _ _ insts _ = ifaces
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 ->
+ returnRn (bagToList insts)
+ where
+ 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
- defds = ([(f, rn_f)], [])
- implicits = mentioned `sub` defds
+ Ifaces _ _ _ _ _ _ inst_mods = ifaces
in
- returnRn (AddedSig (Sig rn_f rn_ty noGenPragmas src_loc), defds, implicits)
+ returnRn inst_mods
+\end{code}
-----
-sub :: ImplicitEnv -> ([(RdrName,RnName)], [(RdrName,RnName)]) -> ImplicitEnv
+\begin{code}
+getImportVersions :: [AvailInfo] -- Imported avails
+ -> RnMG (VersionInfo Name) -- Version info for these names
-sub (val_ment, tc_ment) (val_defds, tc_defds)
- = (delListFromFM val_ment (map fst val_defds),
- delListFromFM tc_ment (map fst tc_defds))
+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}
+%* *
+%*********************************************************
-@cacheInstModules@: cache instance modules specified in imports
+@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}
-cacheInstModules :: IfaceCache -> [Module] -> IO (Bag Error)
-cacheInstModules iface_cache imp_mods
- = readVar iface_cache `thenPrimIO` \ (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
- accumulate (map (cachedIface iface_cache) imp_imods) >>= \ err_or_ifaces ->
+getDeclBinders :: (RdrName -> SrcLoc -> RnMG Name) -- New-name function
+ -> RdrNameHsDecl
+ -> RnMG AvailInfo
- -- Sanity Check:
- -- Assert that instance modules given by direct imports contains
- -- instance modules extracted from all visited modules
+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)
- readVar iface_cache `thenPrimIO` \ (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)
+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])
+
+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)
- return (bag_errs err_or_ifaces)
+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
- bag_errs [] = emptyBag
- bag_errs (Failed err :rest) = err `consBag` bag_errs rest
- bag_errs (Succeeded _:rest) = bag_errs rest
-\end{code}
+ fields = concat (map fst fielddecls)
+getConFieldNames new_name [] = returnRn []
-@rnIfaceInstStuff@: Deal with instance declarations from interface files.
+getClassOpNames new_name (ClassOpSig op _ _ src_loc) = new_name op src_loc
+\end{code}
-\begin{code}
-type InstanceEnv = FiniteMap (RdrName, RdrName) 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 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_cache `thenPrimIO` \ (iface_fm, _) ->
- let
- all_ifaces = eltsFM iface_fm
- all_insts = unionManyBags (map get_insts all_ifaces)
- interesting_insts = filter want_inst (bagToList all_insts)
- -- Sanity Check:
- -- Assert that there are no more instances for the done instances
+%*********************************************************
+%* *
+\subsection{Reading an interface file}
+%* *
+%*********************************************************
- claim_done = filter is_done_inst (bagToList all_insts)
- claim_done_env = foldr add_done_inst emptyFM claim_done
- has_val fm (k,i) = case lookupFM fm k of { Nothing -> False; Just v -> i == v }
- 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))
- }
+\begin{code}
+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
- get_insts (ParsedIface _ _ _ _ _ _ _ _ _ _ insts _) = insts
-
- add_done_inst (InstSig clas tycon _ _) inst_env
- = addToFM_C (+) inst_env (tycon,clas) 1
-
- is_done_inst (InstSig clas tycon _ _)
- = maybeToBool (lookupFM done_inst_env (tycon,clas))
-
- add_imp_occs (val_imps, tc_imps) occ_env
- = case extendGlobalRnEnv occ_env (fmToList val_imps) (fmToList tc_imps) of
- (ext_occ_env, occ_dups) -> ASSERT(isEmptyBag occ_dups)
- ext_occ_env
-
- want_inst i@(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 ...
-
- 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
- case nm of
- Qual _ _ -> False
- Unqual n ->
- case (lookupFM b_tc_names n) of
- Just _ -> True
- Nothing -> maybeToBool (lookupFM b_keys n)
-
- (b_tc_names, b_keys) -- pretty UGLY ...
- = case builtinNameInfo of ((_,builtin_tcs),b_keys,_) -> (builtin_tcs,b_keys)
-
- ppr_insts insts
- = ppAboves (map ppr_inst insts)
- where
- ppr_inst (InstSig c t _ inst_decl)
- = ppCat [ppr PprDebug c, ppr PprDebug t, ppr PprDebug inst_decl]
+ 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}
+@readIface@ trys just one file.
+
\begin{code}
-rnIfaceInst :: RdrIfaceInst -> RnM_Fixes _RealWorld RenamedInstDecl
+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)
+
+ Left (NoSuchThing _) -> returnRn Nothing
+
+ Left err -> failWithRn Nothing
+ (cannaeReadFile file_path err)
-rnIfaceInst (InstSig _ _ _ inst_decl) = rnInstDecl inst_decl
\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}
-finalIfaceInfo ::
- IfaceCache -- iface cache
- -> 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 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))) $
-
- return (emptyFM, emptyFM, [])
+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}
+%*********************************************************
+%* *
+\subsection{Errors}
+%* *
+%*********************************************************
\begin{code}
noIfaceErr mod sty
- = ppCat [ppPStr SLIT("Could not find interface for:"), ppPStr mod]
-
-noDeclInIfaceErr mod str sty
- = ppBesides [ppPStr SLIT("Could not find interface declaration of: "),
- ppPStr mod, ppStr ".", ppPStr str]
+ = ppBesides [ppStr "Could not find interface for ", ppQuote (pprModule sty mod)]
+-- , ppStr " in"]) 4 (ppAboves (map ppStr dirs))
-cannaeReadErr file err sty
+cannaeReadFile file err sty
= ppBesides [ppPStr SLIT("Failed in reading file: "), ppStr file, ppStr "; error=", ppStr (show err)]
-
-ifaceLookupWiredErr msg n sty
- = ppBesides [ppPStr SLIT("Why am I looking up a wired-in "), ppStr msg, ppChar ':', ppr sty n]
-
-badIfaceLookupErr msg name decl sty
- = ppBesides [ppPStr SLIT("Expected a "), ppStr msg, ppPStr SLIT(" declaration, but got this: ???")]
\end{code}