%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[RnIfaces]{Cacheing and Renaming of Interfaces}
\begin{code}
-#include "HsVersions.h"
-
module RnIfaces (
getInterfaceExports,
getImportedInstDecls,
mkSearchPath
) where
-IMP_Ubiq()
-#if __GLASGOW_HASKELL__ >= 202
-import IO
-#endif
-
+#include "HsVersions.h"
-import CmdLineOpts ( opt_TyConPruning )
-import HsSyn ( HsDecl(..), TyDecl(..), ClassDecl(..), HsTyVar, HsExpr, Sig(..), HsType(..),
- HsBinds(..), MonoBinds, DefaultDecl, ConDecl(..), ConDetails(..), BangType, IfaceSig(..),
- FixityDecl(..), Fixity, Fake, InPat, InstDecl(..), SYN_IE(Version), HsIdInfo,
- IE(..), NewOrData(..), hsDeclName
+import CmdLineOpts ( opt_PruneTyDecls, opt_PruneInstDecls,
+ opt_D_show_rn_imports, opt_IgnoreIfacePragmas
+ )
+import HsSyn ( HsDecl(..), TyDecl(..), ClassDecl(..), InstDecl(..), IfaceSig(..),
+ HsType(..), ConDecl(..), IE(..), ConDetails(..), Sig(..),
+ hsDeclName
)
-import HsPragmas ( noGenPragmas )
-import RdrHsSyn ( SYN_IE(RdrNameHsDecl), SYN_IE(RdrNameInstDecl), SYN_IE(RdrNameTyDecl),
- RdrName, rdrNameOcc
+import BasicTypes ( Version, NewOrData(..), IfaceFlavour(..) )
+import RdrHsSyn ( RdrNameHsDecl, RdrNameInstDecl, RdrNameTyDecl,
+ RdrName(..), rdrNameOcc
)
-import RnEnv ( newGlobalName, lookupRn, addImplicitOccsRn,
- availName, availNames, addAvailToNameSet, pprAvail
+import RnEnv ( newImportedGlobalName, addImplicitOccsRn,
+ ifaceFlavour, availName, availNames, addAvailToNameSet
)
import RnSource ( rnHsSigType )
import RnMonad
-import RnHsSyn ( SYN_IE(RenamedHsDecl) )
-import ParseIface ( parseIface )
+import RnHsSyn ( RenamedHsDecl )
+import ParseIface ( parseIface, IfaceStuff(..) )
-import ErrUtils ( SYN_IE(Error), SYN_IE(Warning) )
-import FiniteMap ( FiniteMap, sizeFM, emptyFM, unitFM, delFromFM,
+import FiniteMap ( FiniteMap, sizeFM, emptyFM, delFromFM,
lookupFM, addToFM, addToFM_C, addListToFM,
- fmToList, eltsFM
+ fmToList
)
-import Name ( Name {-instance NamedThing-}, Provenance, OccName(..),
- modAndOcc, occNameString, moduleString, pprModule, isLocallyDefined,
- NameSet(..), emptyNameSet, unionNameSets, nameSetToList,
- minusNameSet, mkNameSet, elemNameSet, nameUnique,
- isWiredInName, maybeWiredInTyConName, maybeWiredInIdName,
- NamedThing(..)
+import Name ( Name {-instance NamedThing-}, OccName(..),
+ nameModule, moduleString, pprModule, isLocallyDefined,
+ isWiredInName, maybeWiredInTyConName,
+ maybeWiredInIdName, nameUnique, NamedThing(..)
)
-import Id ( GenId, Id(..), idType, dataConTyCon, isDataCon )
+import NameSet
+import Id ( idType, isDataConId_maybe )
+import DataCon ( dataConTyCon, dataConType )
import TyCon ( TyCon, tyConDataCons, isSynTyCon, getSynTyConDefn )
import Type ( namesOfType )
-import TyVar ( GenTyVar )
-import SrcLoc ( mkIfaceSrcLoc, SrcLoc )
-import PrelMods ( gHC__ )
-import PrelInfo ( cCallishTyKeys )
+import Var ( Id )
+import SrcLoc ( mkSrcLoc, SrcLoc )
+import PrelMods ( pREL_GHC )
+import PrelInfo ( cCallishTyKeys, thinAirModules )
import Bag
-import Maybes ( MaybeErr(..), expectJust, maybeToBool )
+import Maybes ( MaybeErr(..), maybeToBool )
import ListSetOps ( unionLists )
-import Pretty
-import PprStyle ( PprStyle(..) )
+import Outputable
import Unique ( Unique )
-import Util ( pprPanic, pprTrace, Ord3(..) )
-import StringBuffer ( StringBuffer, hGetStringBuffer, freeStringBuffer )
+import StringBuffer ( StringBuffer, hGetStringBuffer )
+import FastString ( mkFastString )
import Outputable
+
+import IO ( isDoesNotExistError )
+import List ( nub )
+
\end{code}
%*********************************************************
\begin{code}
-getRnStats :: [RenamedHsDecl] -> RnMG Doc
+getRnStats :: [RenamedHsDecl] -> RnMG SDoc
getRnStats all_decls
= getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces this_mod mod_vers_map export_envs decls_fm all_names imp_names unslurped_insts deferred_data_decls inst_mods = ifaces
- n_mods = sizeFM mod_vers_map
+ Ifaces this_mod mod_map decls_fm all_names imp_names (unslurped_insts,_) deferred_data_decls inst_mods = ifaces
+ n_mods = sizeFM mod_map
decls_imported = filter is_imported_decl all_decls
decls_read = [decl | (name, (_, avail, decl)) <- fmToList decls_fm,
is_imported_decl decl = not (isLocallyDefined (hsDeclName decl))
count_decls decls
- = -- pprTrace "count_decls" (ppr PprDebug decls
+ = -- pprTrace "count_decls" (ppr decls
--
-- $$
-- text "========="
-- $$
- -- ppr PprDebug imported_decls
+ -- ppr imported_decls
-- ) $
(class_decls,
data_decls, abstract_data_decls,
%*********************************************************
\begin{code}
-loadInterface :: Doc -> Module -> RnMG Ifaces
-loadInterface doc_str load_mod
- = getIfacesRn `thenRn` \ ifaces ->
- let
- Ifaces this_mod mod_vers_map export_envs decls all_names imp_names insts deferred_data_decls inst_mods = ifaces
- in
+loadInterface :: SDoc -> Module -> IfaceFlavour -> RnMG Ifaces
+loadInterface doc_str load_mod as_source
+ = getIfacesRn `thenRn` \ ifaces ->
+ let
+ Ifaces this_mod mod_map decls
+ all_names imp_names (insts, tycls_names)
+ deferred_data_decls inst_mods = ifaces
+ in
-- CHECK WHETHER WE HAVE IT ALREADY
- if maybeToBool (lookupFM export_envs load_mod)
- then
- returnRn ifaces -- Already in the cache; don't re-read it
- else
+ case lookupFM mod_map load_mod of {
+ Just (hif, _, _, _) | hif `as_good_as` as_source
+ -> -- Already in the cache; don't re-read it
+ returnRn ifaces ;
+ other ->
-- READ THE MODULE IN
- findAndReadIface doc_str load_mod `thenRn` \ read_result ->
- case read_result of {
+ findAndReadIface doc_str load_mod as_source `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_envs = addToFM export_envs load_mod ([],[])
- new_ifaces = Ifaces this_mod mod_vers_map
- new_export_envs
- decls all_names imp_names insts deferred_data_decls inst_mods
+ new_mod_map = addToFM mod_map load_mod (HiFile, 0, [],[])
+ new_ifaces = Ifaces this_mod new_mod_map
+ decls all_names imp_names (insts, tycls_names)
+ deferred_data_decls inst_mods
in
setIfacesRn new_ifaces `thenRn_`
failWithRn new_ifaces (noIfaceErr load_mod) ;
Just (ParsedIface _ mod_vers usages exports rd_inst_mods fixs rd_decls rd_insts) ->
-- LOAD IT INTO Ifaces
- mapRn loadExport exports `thenRn` \ avails_s ->
- foldlRn (loadDecl load_mod) decls rd_decls `thenRn` \ new_decls ->
- foldlRn (loadInstDecl load_mod) insts rd_insts `thenRn` \ new_insts ->
+ -- NB: *first* we do loadDecl, so that the provenance of all the locally-defined
+ --- names is done correctly (notably, whether this is an .hi file or .hi-boot file).
+ -- If we do loadExport first the wrong info gets into the cache (unless we
+ -- explicitly tag each export which seems a bit of a bore)
+ foldlRn (loadDecl load_mod as_source) decls rd_decls `thenRn` \ new_decls ->
+ mapRn loadExport exports `thenRn` \ avails_s ->
+ foldlRn (loadInstDecl load_mod) insts rd_insts `thenRn` \ new_insts ->
let
- export_env = (concat avails_s, fixs)
+ mod_details = (as_source, mod_vers, concat avails_s, 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_envs load_mod export_env)
+ (addToFM mod_map load_mod mod_details)
new_decls
all_names imp_names
- new_insts
+ (new_insts, tycls_names)
deferred_data_decls
new_inst_mods
in
setIfacesRn new_ifaces `thenRn_`
returnRn new_ifaces
- }
+ }}
+
+as_good_as HiFile any = True
+as_good_as any HiBootFile = True
+as_good_as _ _ = False
+
loadExport :: ExportItem -> RnMG [AvailInfo]
-loadExport (mod, entities)
+loadExport (mod, hif, entities)
= mapRn load_entity entities
where
- new_name occ = newGlobalName mod occ
-
--- The communcation between this little code fragment and the "entity" rule
--- in ParseIface.y is a bit gruesome. The idea is that things which are
--- destined to be AvailTCs show up as (occ, [non-empty-list]), whereas
--- things destined to be Avails show up as (occ, [])
+ new_name occ = newImportedGlobalName mod occ hif
- load_entity (occ, occs)
+ load_entity (Avail occ)
+ = new_name occ `thenRn` \ name ->
+ returnRn (Avail name)
+ load_entity (AvailTC occ occs)
= new_name occ `thenRn` \ name ->
- if null occs then
- returnRn (Avail name)
- else
- mapRn new_name occs `thenRn` \ names ->
- returnRn (AvailTC name names)
+ mapRn new_name occs `thenRn` \ names ->
+ returnRn (AvailTC name names)
-loadDecl :: Module -> DeclsMap
+loadDecl :: Module
+ -> IfaceFlavour
+ -> DeclsMap
-> (Version, RdrNameHsDecl)
-> RnMG DeclsMap
-loadDecl mod decls_map (version, decl)
+loadDecl mod as_source decls_map (version, decl)
= getDeclBinders new_implicit_name decl `thenRn` \ avail ->
returnRn (addListToFM decls_map
- [(name,(version,avail,decl)) | name <- availNames avail]
+ [(name,(version,avail,decl')) | name <- availNames avail]
)
where
- new_implicit_name rdr_name loc = newGlobalName mod (rdrNameOcc rdr_name)
+ {-
+ If a signature decl is being loaded and we're ignoring interface pragmas,
+ toss away unfolding information.
+
+ Also, if the signature is loaded from a module we're importing from source,
+ we do the same. This is to avoid situations when compiling a pair of mutually
+ recursive modules, peering at unfolding info in the interface file of the other,
+ e.g., you compile A, it looks at B's interface file and may as a result change
+ it's interface file. Hence, B is recompiled, maybe changing it's interface file,
+ which will the ufolding info used in A to become invalid. Simple way out is to
+ just ignore unfolding info.
+ -}
+ decl' =
+ case decl of
+ SigD (IfaceSig name tp ls loc) | from_hi_boot || opt_IgnoreIfacePragmas ->
+ SigD (IfaceSig name tp [] loc)
+ _ -> decl
+
+ new_implicit_name rdr_name loc = newImportedGlobalName mod (rdrNameOcc rdr_name) as_source
+
+ from_hi_boot = case as_source of
+ HiBootFile -> True
+ other -> False
loadInstDecl :: Module
-> Bag IfaceInst
let
munged_inst_ty = case inst_ty of
HsForAllTy tvs cxt ty -> HsForAllTy tvs [] ty
- HsPreForAllTy cxt ty -> HsPreForAllTy [] ty
other -> inst_ty
in
-- We find the gates by renaming the instance type with in a
-- and returning the occurrence pool.
- initRnMS emptyRnEnv mod_name InterfaceMode (
- findOccurrencesRn (rnHsSigType (\sty -> text "an instance decl") munged_inst_ty)
+ initRnMS emptyRnEnv mod_name vanillaInterfaceMode (
+ findOccurrencesRn (rnHsSigType (text "an instance decl") munged_inst_ty)
) `thenRn` \ gate_names ->
returnRn (((mod_name, decl), gate_names) `consBag` insts)
+
+vanillaInterfaceMode = InterfaceMode Compulsory (\_ -> False)
\end{code}
\begin{code}
checkUpToDate :: Module -> RnMG Bool -- True <=> no need to recompile
checkUpToDate mod_name
- = findAndReadIface doc_str mod_name `thenRn` \ read_result ->
+ = findAndReadIface doc_str mod_name HiFile `thenRn` \ read_result ->
+
+ -- CHECK WHETHER WE HAVE IT ALREADY
case read_result of
Nothing -> -- Old interface file not found, so we'd better bail out
traceRn (sep [ptext SLIT("Didnt find old iface"),
- pprModule PprDebug mod_name]) `thenRn_`
+ pprModule mod_name]) `thenRn_`
returnRn False
Just (ParsedIface _ _ usages _ _ _ _ _)
checkModUsage usages
where
-- Only look in current directory, with suffix .hi
- doc_str = sep [ptext SLIT("Need usage info from"), pprModule PprDebug mod_name]
+ doc_str = sep [ptext SLIT("need usage info from"), pprModule 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 ->
+checkModUsage ((mod, hif, old_mod_vers, whats_imported) : rest)
+ = loadInterface doc_str mod hif `thenRn` \ ifaces ->
let
- Ifaces _ mod_vers _ decls _ _ _ _ _ = ifaces
- maybe_new_mod_vers = lookupFM mod_vers mod
- Just new_mod_vers = maybe_new_mod_vers
+ Ifaces _ mod_map decls _ _ _ _ _ = ifaces
+ maybe_new_mod_vers = lookupFM mod_map mod
+ Just (_, new_mod_vers, _, _) = maybe_new_mod_vers
in
-- If we can't find a version number for the old module then
-- bail out saying things aren't up to date
if not (maybeToBool maybe_new_mod_vers) then
+ traceRn (sep [ptext SLIT("Can't find version number for module"), pprModule mod]) `thenRn_`
returnRn False
else
-- If the module version hasn't changed, just move on
if new_mod_vers == old_mod_vers then
- traceRn (sep [ptext SLIT("Module version unchanged:"), pprModule PprDebug mod]) `thenRn_`
+ traceRn (sep [ptext SLIT("Module version unchanged:"), pprModule mod]) `thenRn_`
checkModUsage rest
else
- traceRn (sep [ptext SLIT("Module version has changed:"), pprModule PprDebug mod]) `thenRn_`
+ traceRn (sep [ptext SLIT("Module version has changed:"), pprModule mod]) `thenRn_`
+
+ -- Module version changed, so check entities inside
+
+ -- If the usage info wants to say "I imported everything from this module"
+ -- it does so by making whats_imported equal to Everything
+ -- In that case, we must recompile
+ case whats_imported of {
+ Everything -> traceRn (ptext SLIT("...and I needed the whole module")) `thenRn_`
+ returnRn False; -- Bale out
- -- New module version, so check entities inside
+ Specifically old_local_vers ->
+
+ -- Non-empty usage list, so check item by item
checkEntityUsage mod decls old_local_vers `thenRn` \ up_to_date ->
if up_to_date then
traceRn (ptext SLIT("...but the bits I use haven'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 = sep [ptext SLIT("need version info for"), pprModule PprDebug mod]
+ doc_str = sep [ptext SLIT("need version info for"), pprModule mod]
checkEntityUsage mod decls []
= returnRn True -- Yes! All up to date!
checkEntityUsage mod decls ((occ_name,old_vers) : rest)
- = newGlobalName mod occ_name `thenRn` \ name ->
+ = newImportedGlobalName mod occ_name HiFile `thenRn` \ name ->
case lookupFM decls name of
Nothing -> -- We used it before, but it ain't there now
- traceRn (sep [ptext SLIT("...and this no longer exported:"), ppr PprDebug name]) `thenRn_`
+ putDocRn (sep [ptext SLIT("No longer exported:"), ppr name]) `thenRn_`
returnRn False
Just (new_vers,_,_) -- It's there, but is it up to date?
| otherwise
-- Out of date, so bale out
- -> traceRn (sep [ptext SLIT("...and this is out of date:"), ppr PprDebug name]) `thenRn_`
+ -> putDocRn (sep [ptext SLIT("Out of date:"), ppr name]) `thenRn_`
returnRn False
\end{code}
%*********************************************************
\begin{code}
-importDecl :: Name -> Necessity -> RnMG (Maybe RdrNameHsDecl)
+importDecl :: Occurrence -> RnSMode -> RnMG (Maybe RdrNameHsDecl)
-- Returns Nothing for a wired-in or already-slurped decl
-importDecl name necessity
+importDecl (name, loc) mode
= checkSlurped name `thenRn` \ already_slurped ->
if already_slurped then
- -- traceRn (sep [text "Already slurped:", ppr PprDebug name]) `thenRn_`
+-- traceRn (sep [text "Already slurped:", ppr name]) `thenRn_`
returnRn Nothing -- Already dealt with
else
if isWiredInName name then
- getWiredInDecl name
+ getWiredInDecl name mode
else
getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces this_mod _ _ _ _ _ _ _ _ = ifaces
- (mod,_) = modAndOcc name
+ Ifaces this_mod _ _ _ _ _ _ _ = ifaces
+ mod = nameModule name
in
if mod == this_mod then -- Don't bring in decls from
- pprTrace "importDecl wierdness:" (ppr PprDebug name) $
+ addWarnRn (importDeclWarn mod name loc) `thenRn_`
+-- pprTrace "importDecl wierdness:" (ppr name) $
returnRn Nothing -- the renamed module's own interface file
--
else
- getNonWiredInDecl name necessity
+ getNonWiredInDecl name loc mode
\end{code}
\begin{code}
-getNonWiredInDecl :: Name -> Necessity -> RnMG (Maybe RdrNameHsDecl)
-getNonWiredInDecl needed_name necessity
- = traceRn doc_str `thenRn_`
- loadInterface doc_str mod `thenRn` \ (Ifaces _ _ _ decls _ _ _ _ _) ->
+getNonWiredInDecl :: Name -> SrcLoc -> RnSMode -> RnMG (Maybe RdrNameHsDecl)
+getNonWiredInDecl needed_name loc mode
+ = traceRn doc_str `thenRn_`
+ loadInterface doc_str mod (ifaceFlavour needed_name) `thenRn` \ (Ifaces _ _ decls _ _ _ _ _) ->
case lookupFM decls needed_name of
-- Special case for data/newtype type declarations
Just (version, avail, TyD ty_decl) | is_data_or_newtype ty_decl
-> getNonWiredDataDecl needed_name version avail ty_decl `thenRn` \ (avail', maybe_decl) ->
- recordSlurp (Just version) avail' `thenRn_`
+ recordSlurp (Just version) necessity avail' `thenRn_`
returnRn maybe_decl
Just (version,avail,decl)
- -> recordSlurp (Just version) avail `thenRn_`
+ -> recordSlurp (Just version) necessity avail `thenRn_`
returnRn (Just decl)
Nothing -> -- Can happen legitimately for "Optional" occurrences
case necessity of {
- Optional -> addWarnRn (getDeclWarn needed_name);
- other -> addErrRn (getDeclErr needed_name)
+ Optional -> addWarnRn (getDeclWarn needed_name loc);
+ other -> addErrRn (getDeclErr needed_name loc)
} `thenRn_`
returnRn Nothing
where
- doc_str = sep [ptext SLIT("Need decl for"), ppr PprDebug needed_name]
- (mod,_) = modAndOcc needed_name
+ necessity = modeToNecessity mode
+ doc_str = sep [ptext SLIT("need decl for"), ppr needed_name, ptext SLIT("needed at"), ppr loc]
+ mod = nameModule needed_name
is_data_or_newtype (TyData _ _ _ _ _ _ _ _) = True
is_data_or_newtype other = False
that we know just what instances to bring into scope.
\begin{code}
-getWiredInDecl name
- = get_wired `thenRn` \ avail ->
- recordSlurp Nothing avail `thenRn_`
+getWiredInDecl name mode
+ = initRnMS emptyRnEnv mod_name new_mode
+ get_wired `thenRn` \ avail ->
+ recordSlurp Nothing necessity avail `thenRn_`
-- Force in the home module in case it has instance decls for
-- the thing we are interested in.
let
main_name = availName avail
main_is_tc = case avail of { AvailTC _ _ -> True; Avail _ -> False }
- (mod,_) = modAndOcc main_name
- doc_str = sep [ptext SLIT("Need home module for wired in thing"), ppr PprDebug name]
+ mod = nameModule main_name
+ doc_str = sep [ptext SLIT("need home module for wired in thing"), ppr name]
in
- (if not main_is_tc || mod == gHC__ then
+ (if not main_is_tc || mod == pREL_GHC then
returnRn ()
else
- loadInterface doc_str mod `thenRn_`
+ loadInterface doc_str mod (ifaceFlavour main_name) `thenRn_`
returnRn ()
- ) `thenRn_`
+ ) `thenRn_`
returnRn Nothing -- No declaration to process further
where
+ necessity = modeToNecessity mode
+ new_mode = case mode of
+ InterfaceMode _ _ -> mode
+ SourceMode -> vanillaInterfaceMode
get_wired | is_tycon -- ... a type constructor
= get_wired_tycon the_tycon
- | (isDataCon the_id) -- ... a wired-in data constructor
- = get_wired_tycon (dataConTyCon the_id)
+ | maybeToBool maybe_data_con -- ... a wired-in data constructor
+ = get_wired_tycon (dataConTyCon data_con)
| otherwise -- ... a wired-in non data-constructor
= get_wired_id the_id
+ mod_name = nameModule name
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
+ maybe_data_con = isDataConId_maybe the_id
+ Just data_con = maybe_data_con
get_wired_id id
- = addImplicitOccsRn (nameSetToList id_mentioned) `thenRn_`
+ = addImplicitOccsRn id_mentions `thenRn_`
returnRn (Avail (getName id))
where
- id_mentioned = namesOfType (idType id)
+ id_mentions = nameSetToList (namesOfType ty)
+ ty = idType id
get_wired_tycon tycon
| isSynTyCon tycon
where
tycon_name = getName tycon
data_cons = tyConDataCons tycon
- mentioned = foldr (unionNameSets . namesOfType . idType) emptyNameSet data_cons
+ mentioned = foldr (unionNameSets . namesOfType . dataConType) emptyNameSet data_cons
\end{code}
%*********************************************************
\begin{code}
-getInterfaceExports :: Module -> RnMG (Avails, [(OccName,Fixity)])
-getInterfaceExports mod
- = loadInterface doc_str mod `thenRn` \ (Ifaces _ _ export_envs _ _ _ _ _ _) ->
- case lookupFM export_envs mod of
+getInterfaceExports :: Module -> IfaceFlavour -> RnMG (Avails, [(OccName,Fixity)])
+getInterfaceExports mod as_source
+ = loadInterface doc_str mod as_source `thenRn` \ (Ifaces _ mod_map _ _ _ _ _ _) ->
+ case lookupFM mod_map 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
+ Just (_, _, avails, fixities) -> returnRn (avails, fixities)
where
- doc_str = sep [pprModule PprDebug mod, ptext SLIT("is directly imported")]
+ doc_str = sep [pprModule mod, ptext SLIT("is directly imported")]
\end{code}
avail@(AvailTC tycon_name _)
ty_decl@(TyData new_or_data context tycon tyvars condecls derivings pragmas src_loc)
| needed_name == tycon_name
- && opt_TyConPruning
- && not (nameUnique needed_name `elem` cCallishTyKeys) -- Hack! Don't prune these tycons whose constructors
- -- the desugarer must be able to see when desugaring
- -- a CCall. Ugh!
+ && opt_PruneTyDecls
+ -- don't prune newtypes, as the code generator may
+ -- want to peer inside a newtype type constructor
+ -- (ClosureInfo.fun_result_ty is the culprit.)
+ && not (new_or_data == NewType)
+ && not (nameUnique needed_name `elem` cCallishTyKeys)
+ -- Hack! Don't prune these tycons whose constructors
+ -- the desugarer must be able to see when desugaring
+ -- a CCall. Ugh!
+
= -- Need the type constructor; so put it in the deferred set for now
getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces this_mod mod_vers_map export_envs decls_fm slurped_names imp_names unslurped_insts deferred_data_decls inst_mods = ifaces
- new_ifaces = Ifaces this_mod mod_vers_map export_envs decls_fm slurped_names imp_names unslurped_insts new_deferred_data_decls inst_mods
+ Ifaces this_mod mod_map decls_fm slurped_names imp_names
+ unslurped_insts deferred_data_decls inst_mods = ifaces
+
+ new_ifaces = Ifaces this_mod mod_map decls_fm slurped_names imp_names
+ unslurped_insts new_deferred_data_decls inst_mods
no_constr_ty_decl = TyData new_or_data [] tycon tyvars [] derivings pragmas src_loc
new_deferred_data_decls = addToFM deferred_data_decls tycon_name no_constr_ty_decl
= -- Need a data constructor, so delete the data decl from the deferred set if it's there
getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces this_mod mod_vers_map export_envs decls_fm slurped_names imp_names unslurped_insts deferred_data_decls inst_mods = ifaces
- new_ifaces = Ifaces this_mod mod_vers_map export_envs decls_fm slurped_names imp_names unslurped_insts new_deferred_data_decls inst_mods
+ Ifaces this_mod mod_map decls_fm slurped_names imp_names
+ unslurped_insts deferred_data_decls inst_mods = ifaces
+
+ new_ifaces = Ifaces this_mod mod_map decls_fm slurped_names imp_names
+ unslurped_insts new_deferred_data_decls inst_mods
new_deferred_data_decls = delFromFM deferred_data_decls tycon_name
in
\begin{code}
getDeferredDataDecls :: RnMG [(Name, RdrNameTyDecl)]
getDeferredDataDecls
- = getIfacesRn `thenRn` \ (Ifaces _ _ _ _ _ _ _ deferred_data_decls _) ->
+ = getIfacesRn `thenRn` \ (Ifaces _ _ _ _ _ _ deferred_data_decls _) ->
let
deferred_list = fmToList deferred_data_decls
trace_msg = hang (text "Slurping abstract data/newtype decls for: ")
- 4 (ppr PprDebug (map fst deferred_list))
+ 4 (ppr (map fst deferred_list))
in
traceRn trace_msg `thenRn_`
returnRn deferred_list
-- removing them from the bag kept in Ifaces
getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces this_mod mod_vers export_envs decls slurped_names imp_names insts deferred_data_decls inst_mods = ifaces
+ Ifaces this_mod mod_map decls slurped_names imp_names (insts, tycls_names) deferred_data_decls inst_mods = ifaces
-- An instance decl is ungated if all its gates have been slurped
select_ungated :: IfaceInst -- A gated inst decl
| otherwise
= (ungated_decls, (decl, remaining_gates) : gated_decls)
where
- remaining_gates = filter (not . (`elemNameSet` slurped_names)) gates
+ remaining_gates = filter (not . (`elemNameSet` tycls_names)) gates
(un_gated_insts, still_gated_insts) = foldrBag select_ungated ([], []) insts
- new_ifaces = Ifaces this_mod mod_vers export_envs decls slurped_names imp_names
- (listToBag still_gated_insts)
+ new_ifaces = Ifaces this_mod mod_map decls slurped_names imp_names
+ ((listToBag still_gated_insts), tycls_names)
+ -- NB: don't throw away tycls_names; we may comre across more instance decls
deferred_data_decls
inst_mods
in
+ traceRn (sep [text "getInstDecls:", fsep (map ppr (nameSetToList tycls_names))]) `thenRn_`
setIfacesRn new_ifaces `thenRn_`
returnRn un_gated_insts
where
- load_it mod = loadInterface (doc_str mod) mod
- doc_str mod = sep [pprModule PprDebug mod, ptext SLIT("is a special-instance module")]
+ load_it mod = loadInterface (doc_str mod) mod HiFile
+ doc_str mod = sep [pprModule mod, ptext SLIT("is a special-instance module")]
getSpecialInstModules :: RnMG [Module]
getSpecialInstModules
= getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces _ _ _ _ _ _ _ _ inst_mods = ifaces
+ Ifaces _ _ _ _ _ _ _ inst_mods = ifaces
in
returnRn inst_mods
\end{code}
getImportVersions this_mod exports
= getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces _ mod_versions_map _ _ _ imp_names _ _ _ = ifaces
- mod_version mod = expectJust "import_versions" (lookupFM mod_versions_map mod)
+ Ifaces _ mod_map _ _ imp_names _ _ _ = ifaces
-- mv_map groups together all the things imported from a particular module.
- mv_map, mv_map_mod :: FiniteMap Module [LocalVersion Name]
+ mv_map, mv_map_mod :: FiniteMap Module (WhatsImported Name)
mv_map_mod = foldl add_mod emptyFM export_mods
-- mv_map_mod records all the modules that have a "module M"
- -- in this module's export list
+ -- in this module's export list with an "Everything"
mv_map = foldl add_mv mv_map_mod imp_names
-- mv_map adds the version numbers of things exported individually
- in
- returnRn [ (mod, mod_version mod, local_versions)
- | (mod, local_versions) <- fmToList mv_map
- ]
+ mk_version_info (mod, local_versions)
+ = case lookupFM mod_map mod of
+ Just (hif, version, _, _) -> (mod, hif, version, local_versions)
+ in
+ returnRn (map mk_version_info (fmToList mv_map))
where
export_mods = case exports of
Nothing -> []
Just es -> [mod | IEModuleContents mod <- es, mod /= this_mod]
add_mv mv_map v@(name, version)
- = addToFM_C (\ ls _ -> (v:ls)) mv_map mod [v]
+ = addToFM_C add_item mv_map mod (Specifically [v])
where
- (mod,_) = modAndOcc name
+ mod = nameModule name
+
+ add_item Everything _ = Everything
+ add_item (Specifically xs) _ = Specifically (v:xs)
- add_mod mv_map mod = addToFM mv_map mod []
+ add_mod mv_map mod = addToFM mv_map mod Everything
\end{code}
\begin{code}
checkSlurped name
- = getIfacesRn `thenRn` \ (Ifaces _ _ _ _ slurped_names _ _ _ _) ->
+ = getIfacesRn `thenRn` \ (Ifaces _ _ _ slurped_names _ _ _ _) ->
returnRn (name `elemNameSet` slurped_names)
getSlurpedNames :: RnMG NameSet
getSlurpedNames
= getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces _ _ _ _ slurped_names _ _ _ _ = ifaces
+ Ifaces _ _ _ slurped_names _ _ _ _ = ifaces
in
returnRn slurped_names
-recordSlurp maybe_version avail
- = -- traceRn (sep [text "Record slurp:", pprAvail PprDebug avail]) `thenRn_`
+recordSlurp maybe_version necessity avail
+ = {- traceRn (hsep [text "Record slurp:", pprAvail avail,
+ -- NB PprForDebug prints export flag, which is too
+ -- strict; it's a knot-tied thing in RnNames
+ case necessity of {Compulsory -> text "comp"; Optional -> text "opt" } ]) `thenRn_`
+ -}
getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces this_mod mod_vers export_envs decls slurped_names imp_names insts deferred_data_decls inst_mods = ifaces
+ Ifaces this_mod mod_map decls slurped_names imp_names
+ (insts, tycls_names) deferred_data_decls inst_mods = ifaces
+
new_slurped_names = addAvailToNameSet slurped_names avail
new_imp_names = case maybe_version of
- Just version -> (availName avail, version) : imp_names
+ Just version -> (availName avail, version) : imp_names
Nothing -> imp_names
- new_ifaces = Ifaces this_mod mod_vers export_envs decls
+ -- Add to the names that will let in instance declarations;
+ -- but only (a) if it's a type/class
+ -- (b) if it's compulsory (unless the test flag opt_PruneInstDecls is off)
+ new_tycls_names = case avail of
+ AvailTC tc _ | not opt_PruneInstDecls ||
+ case necessity of {Optional -> False; Compulsory -> True }
+ -> tycls_names `addOneToNameSet` tc
+ otherwise -> tycls_names
+
+ new_ifaces = Ifaces this_mod mod_map decls
new_slurped_names
new_imp_names
- insts
+ (insts, new_tycls_names)
deferred_data_decls
inst_mods
in
are handled by the sourc-code specific stuff in RnNames.
\begin{code}
-getDeclBinders :: (RdrName -> SrcLoc -> RnMG Name) -- New-name function
+getDeclBinders :: (RdrName -> SrcLoc -> RnMG Name) -- New-name function
-> RdrNameHsDecl
-> RnMG AvailInfo
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 (AvailTC tycon_name (tycon_name : sub_names))
+ returnRn (AvailTC tycon_name (tycon_name : nub sub_names))
+ -- The "nub" is because getConFieldNames can legitimately return duplicates,
+ -- when a record declaration has the same field in multiple constructors
getDeclBinders new_name (TyD (TySynonym tycon _ _ src_loc))
= new_name tycon src_loc `thenRn` \ tycon_name ->
returnRn (AvailTC tycon_name [tycon_name])
-getDeclBinders new_name (ClD (ClassDecl _ cname _ sigs _ _ src_loc))
+getDeclBinders new_name (ClD (ClassDecl _ cname _ sigs _ _ tname dname src_loc))
= new_name cname src_loc `thenRn` \ class_name ->
+ new_name dname src_loc `thenRn` \ datacon_name ->
+ new_name tname src_loc `thenRn` \ tycon_name ->
+
+ -- Record the names for the class ops
mapRn (getClassOpNames new_name) sigs `thenRn` \ sub_names ->
- returnRn (AvailTC class_name (class_name : sub_names))
+
+ returnRn (AvailTC class_name (class_name : datacon_name : tycon_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 (ForD _) = returnRn NotAvailable
getDeclBinders new_name (DefD _) = returnRn NotAvailable
getDeclBinders new_name (InstD _) = returnRn NotAvailable
----------------
-getConFieldNames new_name (ConDecl con _ (RecCon fielddecls) src_loc : rest)
+getConFieldNames new_name (ConDecl con _ _ (RecCon 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
fields = concat (map fst fielddecls)
-getConFieldNames new_name (ConDecl con _ _ src_loc : rest)
+getConFieldNames new_name (ConDecl con _ _ _ src_loc : rest)
= new_name con src_loc `thenRn` \ n ->
getConFieldNames new_name rest `thenRn` \ ns ->
returnRn (n:ns)
%*********************************************************
\begin{code}
-findAndReadIface :: Doc -> Module -> RnMG (Maybe ParsedIface)
+findAndReadIface :: SDoc -> Module
+ -> IfaceFlavour
+ -> RnMG (Maybe ParsedIface)
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-findAndReadIface doc_str filename
+findAndReadIface doc_str mod_name as_source
= traceRn trace_msg `thenRn_`
- getSearchPathRn `thenRn` \ dirs ->
- try dirs dirs
+ -- we keep two maps for interface files,
+ -- one for 'normal' ones, the other for .hi-boot files,
+ -- hence the need to signal which kind we're interested.
+ getModuleHiMap as_source `thenRn` \ himap ->
+ case (lookupFM himap (moduleString mod_name)) of
+ -- Found the file
+ Just fpath -> readIface fpath
+ -- Hack alert! When compiling PrelBase we have to load the
+ -- decls for packCString# and friends; they are 'thin-air' Ids
+ -- (see PrelInfo.lhs). So if we don't find the HiFile we quietly
+ -- look for a .hi-boot file instead, and use that
+ Nothing | thinAirLoop mod_name as_source
+ -> findAndReadIface doc_str mod_name HiBootFile
+ | otherwise
+ -> traceRn (ptext SLIT("...failed")) `thenRn_`
+ returnRn Nothing
where
- trace_msg = hang (hcat [ptext SLIT("Reading interface for "),
- ptext filename, semi])
- 4 (hcat [ptext SLIT("reason: "), doc_str])
-
- try all_dirs [] = traceRn (ptext SLIT("...failed")) `thenRn_`
- returnRn Nothing
-
- try all_dirs ((dir,hisuf):dirs)
- = readIface file_path `thenRn` \ read_result ->
- case read_result of
- Nothing -> try all_dirs dirs
- Just iface -> traceRn (ptext SLIT("...done")) `thenRn_`
- returnRn (Just iface)
- where
- file_path = dir ++ "/" ++ moduleString filename ++ hisuf
+ thinAirLoop mod_name HiFile = mod_name `elem` thinAirModules
+ thinAirLoop mod_name hif = False
+
+ trace_msg = sep [hsep [ptext SLIT("Reading"),
+ case as_source of { HiBootFile -> ptext SLIT("[boot]"); other -> empty},
+ ptext SLIT("interface for"),
+ ptext mod_name <> semi],
+ nest 4 (ptext SLIT("reason:") <+> doc_str)]
\end{code}
-@readIface@ trys just one file.
+@readIface@ tries just the one file.
\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 (hGetStringBuffer file_path) `thenRn` \ read_result ->
---OLD: = ioToRnMG (readFile file_path) `thenRn` \ read_result ->
+ = ioToRnMG (hGetStringBuffer file_path) `thenRn` \ read_result ->
case read_result of
- Right contents -> case parseIface contents of
- Failed err -> --ioToRnMG (freeStringBuffer contents) `thenRn` \ _ ->
- failWithRn Nothing err
- Succeeded iface -> --ioToRnMG (freeStringBuffer contents) `thenRn` \ _ ->
- returnRn (Just iface)
+ Right contents ->
+ case parseIface contents (mkSrcLoc (mkFastString file_path) 1) of
+ Failed err -> failWithRn Nothing err
+ Succeeded (PIface iface) ->
+ if opt_D_show_rn_imports then
+ putDocRn (hcat[ptext SLIT("Read "), text file_path]) `thenRn_`
+ returnRn (Just iface)
+ else
+ returnRn (Just iface)
-#if __GLASGOW_HASKELL__ >= 202
Left err ->
if isDoesNotExistError err then
returnRn Nothing
else
failWithRn Nothing (cannaeReadFile file_path err)
-#else /* 2.01 and 0.2x */
- Left (NoSuchThing _) -> returnRn Nothing
-
- Left err -> failWithRn Nothing
- (cannaeReadFile file_path err)
-#endif
-
\end{code}
-mkSearchPath takes a string consisting of a colon-separated list of directories and corresponding
-suffixes, and turns it into a list of (directory, suffix) pairs. For example:
+%*********************************************************
+%* *
+\subsection{Utils}
+%* *
+%*********************************************************
+
+@mkSearchPath@ takes a string consisting of a colon-separated list
+of directories and corresponding suffixes, and turns it into a list
+of (directory, suffix) pairs. For example:
\begin{verbatim}
- mkSearchPath "foo%.hi:.%.p_hi:baz%.mc_hi" = [("foo",".hi"),( ".", ".p_hi"), ("baz",".mc_hi")]
+ mkSearchPath "foo%.hi:.%.p_hi:baz%.mc_hi"
+ = [("foo",".hi"),( ".", ".p_hi"), ("baz",".mc_hi")]
\begin{verbatim}
\begin{code}
\end{code}
%*********************************************************
-%* *
+%* *
\subsection{Errors}
-%* *
+%* *
%*********************************************************
\begin{code}
-noIfaceErr filename sty
- = hcat [ptext SLIT("Could not find valid interface file "), quotes (pprModule sty filename)]
--- , text " in"]) 4 (vcat (map text dirs))
-
-cannaeReadFile file err sty
- = hcat [ptext SLIT("Failed in reading file: "), text file, ptext SLIT("; error="), text (show err)]
-
-getDeclErr name sty
- = sep [ptext SLIT("Failed to find interface decl for"), ppr sty name]
+noIfaceErr filename
+ = hcat [ptext SLIT("Could not find valid interface file "),
+ quotes (pprModule filename)]
+
+cannaeReadFile file err
+ = hcat [ptext SLIT("Failed in reading file: "),
+ text file,
+ ptext SLIT("; error="),
+ text (show err)]
+
+getDeclErr name loc
+ = sep [ptext SLIT("Failed to find interface decl for"),
+ quotes (ppr name), ptext SLIT("needed at"), ppr loc]
+
+getDeclWarn name loc
+ = sep [ptext SLIT("Failed to find (optional) interface decl for"),
+ quotes (ppr name), ptext SLIT("desired at"), ppr loc]
+
+importDeclWarn mod name loc
+ = sep [ptext SLIT("Compiler tried to import decl from interface file with same name as module."),
+ ptext SLIT("(possible cause: module name clashes with interface file already in scope.)")
+ ] $$
+ hsep [ptext SLIT("Interface:"), quotes (pprModule mod), comma, ptext SLIT("name:"), quotes (ppr name),
+ comma, ptext SLIT("desired at:"), ppr loc
+ ]
-getDeclWarn name sty
- = sep [ptext SLIT("Warning: failed to find (optional) interface decl for"), ppr sty name]
\end{code}
projects / ghc-hetmet.git / blobdiff