\begin{code}
module RnIfaces (
- getInterfaceExports,
- getImportedInstDecls,
- getSpecialInstModules, getDeferredDataDecls,
+ getInterfaceExports,
+ getImportedInstDecls, getImportedRules,
+ lookupFixity, loadHomeInterface,
importDecl, recordSlurp,
- getImportVersions, getSlurpedNames, getRnStats, getImportedFixities,
+ getImportVersions, getSlurped,
checkUpToDate,
- getDeclBinders,
- mkSearchPath
+ getDeclBinders
) where
#include "HsVersions.h"
-import CmdLineOpts ( opt_PruneTyDecls, opt_PruneInstDecls,
- opt_D_show_rn_imports, opt_IgnoreIfacePragmas
- )
+import CmdLineOpts ( opt_NoPruneDecls, opt_IgnoreIfacePragmas )
import HsSyn ( HsDecl(..), TyClDecl(..), InstDecl(..), IfaceSig(..),
HsType(..), ConDecl(..), IE(..), ConDetails(..), Sig(..),
- FixitySig(..),
- hsDeclName, countTyClDecls, isDataDecl, isClassOpSig
+ FixitySig(..), RuleDecl(..),
+ isClassOpSig
)
-import BasicTypes ( Version, NewOrData(..) )
-import RdrHsSyn ( RdrNameHsDecl, RdrNameInstDecl, RdrNameTyClDecl,
+import BasicTypes ( Version, NewOrData(..), defaultFixity )
+import RdrHsSyn ( RdrNameHsDecl, RdrNameInstDecl, RdrNameTyClDecl, RdrNameRuleDecl,
+ extractHsTyRdrNames
)
-import RnEnv ( newImportedGlobalName, newImportedGlobalFromRdrName,
- addImplicitOccsRn, pprAvail,
- availName, availNames, addAvailToNameSet
+import RnEnv ( mkImportedGlobalName, newImportedBinder, mkImportedGlobalFromRdrName,
+ lookupOccRn,
+ pprAvail,
+ availName, availNames, addAvailToNameSet,
+ FreeVars, emptyFVs
)
-import RnSource ( rnHsSigType )
import RnMonad
import RnHsSyn ( RenamedHsDecl )
import ParseIface ( parseIface, IfaceStuff(..) )
import FiniteMap ( FiniteMap, sizeFM, emptyFM, delFromFM,
lookupFM, addToFM, addToFM_C, addListToFM,
- fmToList
+ fmToList, elemFM, foldFM
)
import Name ( Name {-instance NamedThing-},
nameModule, isLocallyDefined,
- isWiredInName, maybeWiredInTyConName,
- maybeWiredInIdName, nameUnique, NamedThing(..),
- pprEncodedFS
+ isWiredInName, nameUnique, NamedThing(..)
)
-import Module ( Module, mkBootModule, moduleString, pprModule,
- mkDynamicModule, moduleIfaceFlavour, bootFlavour, hiFile,
- moduleUserString, moduleFS, setModuleFlavour
+import Module ( Module, moduleString, pprModule,
+ mkVanillaModule, pprModuleName,
+ moduleUserString, moduleName, isLibModule,
+ ModuleName, WhereFrom(..),
)
import RdrName ( RdrName, rdrNameOcc )
import NameSet
-import Id ( idType, isDataConId_maybe )
-import DataCon ( dataConTyCon, dataConType )
-import TyCon ( TyCon, tyConDataCons, isSynTyCon, getSynTyConDefn )
-import Type ( namesOfType )
import Var ( Id )
import SrcLoc ( mkSrcLoc, SrcLoc )
import PrelMods ( pREL_GHC )
import PrelInfo ( cCallishTyKeys, thinAirModules )
import Bag
-import Maybes ( MaybeErr(..), maybeToBool )
+import Maybes ( MaybeErr(..), maybeToBool, orElse )
import ListSetOps ( unionLists )
import Outputable
import Unique ( Unique )
\end{code}
-
-%*********************************************************
-%* *
-\subsection{Statistics}
-%* *
-%*********************************************************
-
-\begin{code}
-getRnStats :: [RenamedHsDecl] -> RnMG SDoc
-getRnStats all_decls
- = getIfacesRn `thenRn` \ ifaces ->
- let
- n_mods = sizeFM (iModMap ifaces)
-
- decls_imported = filter is_imported_decl all_decls
-
- decls_read = [decl | (_, avail, decl, True) <- nameEnvElts (iDecls ifaces),
- -- Data, newtype, and class decls are in the decls_fm
- -- under multiple names; the tycon/class, and each
- -- constructor/class op too.
- -- The 'True' selects just the 'main' decl
- not (isLocallyDefined (availName avail))
- ]
-
- (cd_rd, dd_rd, add_rd, nd_rd, and_rd, sd_rd, vd_rd, _) = count_decls decls_read
- (cd_sp, dd_sp, add_sp, nd_sp, and_sp, sd_sp, vd_sp, id_sp) = count_decls decls_imported
-
- (unslurped_insts, _) = iDefInsts ifaces
- inst_decls_unslurped = length (bagToList unslurped_insts)
- inst_decls_read = id_sp + inst_decls_unslurped
-
- stats = vcat
- [int n_mods <> text " interfaces read",
- hsep [ int cd_sp, text "class decls imported, out of",
- int cd_rd, text "read"],
- hsep [ int dd_sp, text "data decls imported (of which", int add_sp,
- text "abstractly), out of",
- int dd_rd, text "read"],
- hsep [ int nd_sp, text "newtype decls imported (of which", int and_sp,
- text "abstractly), out of",
- int nd_rd, text "read"],
- hsep [int sd_sp, text "type synonym decls imported, out of",
- int sd_rd, text "read"],
- hsep [int vd_sp, text "value signatures imported, out of",
- int vd_rd, text "read"],
- hsep [int id_sp, text "instance decls imported, out of",
- int inst_decls_read, text "read"]
- ]
- in
- returnRn (hcat [text "Renamer stats: ", stats])
-
-is_imported_decl (DefD _) = False
-is_imported_decl (ValD _) = False
-is_imported_decl decl = not (isLocallyDefined (hsDeclName decl))
-
-count_decls decls
- = -- pprTrace "count_decls" (ppr decls
- --
- -- $$
- -- text "========="
- -- $$
- -- ppr imported_decls
- -- ) $
- (class_decls,
- data_decls, abstract_data_decls,
- newtype_decls, abstract_newtype_decls,
- syn_decls,
- val_decls,
- inst_decls)
- where
- tycl_decls = [d | TyClD d <- decls]
- (class_decls, data_decls, newtype_decls, syn_decls) = countTyClDecls tycl_decls
- abstract_data_decls = length [() | TyData DataType _ _ _ [] _ _ _ <- tycl_decls]
- abstract_newtype_decls = length [() | TyData NewType _ _ _ [] _ _ _ <- tycl_decls]
-
- val_decls = length [() | SigD _ <- decls]
- inst_decls = length [() | InstD _ <- decls]
-
-\end{code}
-
%*********************************************************
%* *
\subsection{Loading a new interface file}
%*********************************************************
\begin{code}
-loadHomeInterface :: SDoc -> Name -> RnMG (Module, Ifaces)
+loadHomeInterface :: SDoc -> Name -> RnM d (Module, Ifaces)
loadHomeInterface doc_str name
- = loadInterface doc_str (nameModule name)
+ = loadInterface doc_str (moduleName (nameModule name)) ImportBySystem
-loadInterface :: SDoc -> Module -> RnMG (Module, Ifaces)
-loadInterface doc_str load_mod
- = getIfacesRn `thenRn` \ ifaces ->
+loadInterface :: SDoc -> ModuleName -> WhereFrom -> RnM d (Module, Ifaces)
+loadInterface doc_str mod_name from
+ = getIfacesRn `thenRn` \ ifaces ->
let
- hi_boot_wanted = bootFlavour (moduleIfaceFlavour load_mod)
- mod_map = iModMap ifaces
- (insts, tycls_names) = iDefInsts ifaces
-
+ mod_map = iImpModInfo ifaces
+ mod_info = lookupFM mod_map mod_name
+ in_map = maybeToBool mod_info
in
+
+ -- Issue a warning for a redundant {- SOURCE -} import
+ -- It's redundant if the moduld is in the iImpModInfo at all,
+ -- because we arrange to read all the ordinary imports before
+ -- any of the {- SOURCE -} imports
+ warnCheckRn (not (in_map && case from of {ImportByUserSource -> True; other -> False}))
+ (warnRedundantSourceImport mod_name) `thenRn_`
+
-- CHECK WHETHER WE HAVE IT ALREADY
- case lookupFM mod_map load_mod of {
- Just (existing_hif, _, _)
- | hi_boot_wanted || not (bootFlavour existing_hif)
- -> -- Already in the cache, and new version is no better than old,
- -- so don't re-read it
- returnRn (setModuleFlavour existing_hif load_mod, ifaces) ;
- other ->
+ case mod_info of {
+ Just (_, _, Just (load_mod, _, _))
+ -> -- We're read it already so don't re-read it
+ returnRn (load_mod, ifaces) ;
+
+ mod_map_result ->
-- READ THE MODULE IN
- findAndReadIface doc_str load_mod `thenRn` \ read_result ->
+ findAndReadIface doc_str mod_name from in_map `thenRn` \ (hi_boot_read, read_result) ->
case read_result of {
- Nothing | not hi_boot_wanted && load_mod `elem` thinAirModules
- -> -- 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
- --
- -- NB this causes multiple "failed" attempts to read PrelPack,
- -- which makes curious reading with -dshow-rn-trace, but
- -- there's no harm done
- loadInterface doc_str (mkBootModule load_mod)
-
-
- | otherwise
- -> -- Not found, so add an empty export env to the Ifaces map
+ Nothing -> -- Not found, so add an empty export env to the Ifaces map
-- so that we don't look again
let
- new_mod_map = addToFM mod_map load_mod (hiFile, 0, [])
- new_ifaces = ifaces { iModMap = new_mod_map }
+ mod = mkVanillaModule mod_name
+ new_mod_map = addToFM mod_map mod_name (0, False, Just (mod, False, []))
+ new_ifaces = ifaces { iImpModInfo = new_mod_map }
in
setIfacesRn new_ifaces `thenRn_`
- failWithRn (load_mod, new_ifaces) (noIfaceErr load_mod) ;
+ failWithRn (mod, new_ifaces) (noIfaceErr mod hi_boot_read) ;
-- Found and parsed!
- Just (the_mod, ParsedIface mod_vers usages exports rd_inst_mods rd_decls rd_insts) ->
-
+ Just (mod, iface) ->
-- LOAD IT INTO Ifaces
- -- First set the module
-- 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)
- getModuleRn `thenRn` \ this_mod ->
- setModuleRn the_mod $ -- First set the module name of the module being loaded,
- -- so that unqualified occurrences in the interface file
- -- get the right qualifer
- foldlRn loadDecl (iDecls ifaces) rd_decls `thenRn` \ new_decls ->
- foldlRn loadFixDecl (iFixes ifaces) rd_decls `thenRn` \ new_fixities ->
- foldlRn loadInstDecl insts rd_insts `thenRn` \ new_insts ->
-
- mapRn (loadExport this_mod) exports `thenRn` \ avails_s ->
+ getModuleRn `thenRn` \ this_mod_nm ->
let
- -- Notice: the 'flavour' of the loaded Module does not have to
- -- be the same as the requested Module.
- the_mod_hif = moduleIfaceFlavour the_mod
- mod_details = (the_mod_hif, mod_vers, concat avails_s)
-
- -- Exclude this module from the "special-inst" modules
- new_inst_mods = iInstMods ifaces `unionLists` (filter (/= this_mod) rd_inst_mods)
-
- new_ifaces = ifaces { iModMap = addToFM mod_map the_mod mod_details,
- iDecls = new_decls,
- iFixes = new_fixities,
- iDefInsts = (new_insts, tycls_names),
- iInstMods = new_inst_mods }
+ rd_decls = pi_decls iface
+ in
+ foldlRn (loadDecl mod) (iDecls ifaces) rd_decls `thenRn` \ new_decls ->
+ foldlRn (loadInstDecl mod) (iInsts ifaces) (pi_insts iface) `thenRn` \ new_insts ->
+ foldlRn (loadRule mod) (iRules ifaces) (pi_rules iface) `thenRn` \ new_rules ->
+ foldlRn (loadFixDecl mod_name) (iFixes ifaces) rd_decls `thenRn` \ new_fixities ->
+ mapRn (loadExport this_mod_nm) (pi_exports iface) `thenRn` \ avails_s ->
+ let
+ -- For an explicit user import, add to mod_map info about
+ -- the things the imported module depends on, extracted
+ -- from its usage info.
+ mod_map1 = case from of
+ ImportByUser -> addModDeps mod mod_map (pi_usages iface)
+ other -> mod_map
+
+ -- Now add info about this module
+ mod_map2 = addToFM mod_map1 mod_name mod_details
+ mod_details = (pi_mod iface, pi_orphan iface, Just (mod, hi_boot_read, concat avails_s))
+
+ new_ifaces = ifaces { iImpModInfo = mod_map2,
+ iDecls = new_decls,
+ iFixes = new_fixities,
+ iRules = new_rules,
+ iInsts = new_insts }
in
setIfacesRn new_ifaces `thenRn_`
- returnRn (the_mod, new_ifaces)
+ returnRn (mod, new_ifaces)
}}
-loadExport :: Module -> ExportItem -> RnMG [AvailInfo]
+addModDeps :: Module -> ImportedModuleInfo
+ -> [ImportVersion a] -> ImportedModuleInfo
+addModDeps mod mod_deps new_deps
+ = foldr add mod_deps new_deps
+ where
+ is_lib = isLibModule mod -- Don't record dependencies when importing a library module
+ add (imp_mod, version, has_orphans, _) deps
+ | is_lib && not has_orphans = deps
+ | otherwise = addToFM_C combine deps imp_mod (version, has_orphans, Nothing)
+ -- Record dependencies for modules that are
+ -- either are dependent via a non-library module
+ -- or contain orphan rules or instance decls
+
+ -- Don't ditch a module that's already loaded!!
+ combine old@(_, _, Just _) new = old
+ combine old@(_, _, Nothing) new = new
+
+loadExport :: ModuleName -> ExportItem -> RnM d [AvailInfo]
loadExport this_mod (mod, entities)
| mod == this_mod = returnRn []
-- If the module exports anything defined in this module, just ignore it.
-- but it's a bogus thing to do!
| otherwise
- = setModuleFlavourRn mod `thenRn` \ mod' ->
- mapRn (load_entity mod') entities
+ = mapRn (load_entity mod) entities
where
- new_name mod occ = newImportedGlobalName mod occ
+ new_name mod occ = mkImportedGlobalName mod occ
load_entity mod (Avail occ)
= new_name mod occ `thenRn` \ name ->
returnRn (AvailTC name names)
-loadFixDecl :: FixityEnv
+loadFixDecl :: ModuleName -> FixityEnv
-> (Version, RdrNameHsDecl)
- -> RnMG FixityEnv
-loadFixDecl fixity_env (version, FixD (FixitySig rdr_name fixity loc))
+ -> RnM d FixityEnv
+loadFixDecl mod_name fixity_env (version, FixD sig@(FixitySig rdr_name fixity loc))
= -- Ignore the version; when the fixity changes the version of
-- its 'host' entity changes, so we don't need a separate version
-- number for fixities
- newImportedGlobalFromRdrName rdr_name `thenRn` \ name ->
+ mkImportedGlobalName mod_name (rdrNameOcc rdr_name) `thenRn` \ name ->
let
new_fixity_env = addToNameEnv fixity_env name (FixitySig name fixity loc)
in
returnRn new_fixity_env
-- Ignore the other sorts of decl
-loadFixDecl fixity_env other_decl = returnRn fixity_env
+loadFixDecl mod_name fixity_env other_decl = returnRn fixity_env
-loadDecl :: DeclsMap
+loadDecl :: Module
+ -> DeclsMap
-> (Version, RdrNameHsDecl)
- -> RnMG DeclsMap
+ -> RnM d DeclsMap
-loadDecl decls_map (version, decl)
+loadDecl mod decls_map (version, decl)
= getDeclBinders new_name decl `thenRn` \ maybe_avail ->
case maybe_avail of {
Nothing -> returnRn decls_map; -- No bindings
let
main_name = availName avail
new_decls_map = foldl add_decl decls_map
- [ (name, (version,avail,decl',name==main_name))
+ [ (name, (version, avail, name==main_name, (mod, decl)))
| name <- sys_bndrs ++ availNames avail]
add_decl decls_map (name, stuff)
= WARN( name `elemNameEnv` decls_map, ppr name )
returnRn new_decls_map
}
where
- new_name rdr_name loc = newImportedGlobalFromRdrName rdr_name
+ -- newImportedBinder puts into the cache the binder with the
+ -- module information set correctly. When the decl is later renamed,
+ -- the binding site will thereby get the correct module.
+ new_name rdr_name loc = newImportedBinder mod rdr_name
+
{-
If a signature decl is being loaded, and optIgnoreIfacePragmas is on,
we toss away unfolding information.
file there isn't going to *be* any pragma info. Maybe the above comment
dates from a time where we picked up a .hi file first if it existed?]
-}
- decl' =
- case decl of
- SigD (IfaceSig name tp ls loc) | opt_IgnoreIfacePragmas ->
- SigD (IfaceSig name tp [] loc)
- _ -> decl
+ decl' = case decl of
+ SigD (IfaceSig name tp ls loc) | opt_IgnoreIfacePragmas -> SigD (IfaceSig name tp [] loc)
+ other -> decl
-loadInstDecl :: Bag IfaceInst
+loadInstDecl :: Module
+ -> Bag GatedDecl
-> RdrNameInstDecl
- -> RnMG (Bag IfaceInst)
-loadInstDecl insts decl@(InstDecl inst_ty binds uprags dfun_name src_loc)
+ -> RnM d (Bag GatedDecl)
+loadInstDecl mod insts decl@(InstDecl inst_ty binds uprags dfun_name src_loc)
=
-- Find out what type constructors and classes are "gates" for the
-- instance declaration. If all these "gates" are slurped in then
munged_inst_ty = case inst_ty of
HsForAllTy tvs cxt ty -> HsForAllTy tvs [] ty
other -> inst_ty
+ free_names = extractHsTyRdrNames munged_inst_ty
in
- -- We find the gates by renaming the instance type with in a
- -- and returning the free variables of the type
- initRnMS emptyRnEnv vanillaInterfaceMode (
- discardOccurrencesRn (rnHsSigType (text "an instance decl") munged_inst_ty)
- ) `thenRn` \ (_, gate_names) ->
- getModuleRn `thenRn` \ mod_name ->
- returnRn (((mod_name, decl), gate_names) `consBag` insts)
-
-vanillaInterfaceMode = InterfaceMode Compulsory
+ setModuleRn (moduleName mod) $
+ mapRn mkImportedGlobalFromRdrName free_names `thenRn` \ gate_names ->
+ returnRn ((mkNameSet gate_names, (mod, InstD decl)) `consBag` insts)
+
+loadRule :: Module -> Bag GatedDecl
+ -> RdrNameRuleDecl -> RnM d (Bag GatedDecl)
+-- "Gate" the rule simply by whether the rule variable is
+-- needed. We can refine this later.
+loadRule mod rules decl@(IfaceRuleDecl var body src_loc)
+ = setModuleRn (moduleName mod) $
+ mkImportedGlobalFromRdrName var `thenRn` \ var_name ->
+ returnRn ((unitNameSet var_name, (mod, RuleD decl)) `consBag` rules)
\end{code}
%********************************************************
\begin{code}
-checkUpToDate :: Module -> RnMG Bool -- True <=> no need to recompile
+checkUpToDate :: ModuleName -> RnMG Bool -- True <=> no need to recompile
checkUpToDate mod_name
- = findAndReadIface doc_str mod_name `thenRn` \ read_result ->
+ = getIfacesRn `thenRn` \ ifaces ->
+ findAndReadIface doc_str mod_name
+ ImportByUser
+ (error "checkUpToDate") `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 mod_name]) `thenRn_`
+ pprModuleName mod_name]) `thenRn_`
returnRn False
- Just (_, ParsedIface _ usages _ _ _ _)
+ Just (_, iface)
-> -- Found it, so now check it
- checkModUsage usages
+ checkModUsage (pi_usages iface)
where
-- Only look in current directory, with suffix .hi
- doc_str = sep [ptext SLIT("need usage info from"), pprModule mod_name]
+ doc_str = sep [ptext SLIT("need usage info from"), pprModuleName mod_name]
checkModUsage [] = returnRn True -- Yes! Everything is up to date!
-checkModUsage ((mod, old_mod_vers, whats_imported) : rest)
- = loadInterface doc_str mod `thenRn` \ (mod, ifaces) ->
+checkModUsage ((mod_name, old_mod_vers, _, whats_imported) : rest)
+ = loadInterface doc_str mod_name ImportBySystem `thenRn` \ (mod, ifaces) ->
let
- maybe_new_mod_vers = lookupFM (iModMap ifaces) mod
- Just (_, new_mod_vers, _) = maybe_new_mod_vers
+ maybe_mod_vers = case lookupFM (iImpModInfo ifaces) mod_name of
+ Just (version, _, Just (_, _, _)) -> Just version
+ other -> Nothing
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
+ case maybe_mod_vers of {
+ Nothing -> -- If we can't find a version number for the old module then
+ -- bail out saying things aren't up to date
+ traceRn (sep [ptext SLIT("Can't find version number for module"),
+ pprModuleName mod_name]) `thenRn_`
+ returnRn False ;
+
+ Just new_mod_vers ->
-- 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 mod]) `thenRn_`
+ traceRn (sep [ptext SLIT("Module version unchanged:"), pprModuleName mod_name]) `thenRn_`
checkModUsage rest
else
- traceRn (sep [ptext SLIT("Module version has changed:"), pprModule mod]) `thenRn_`
+ traceRn (sep [ptext SLIT("Module version has changed:"), pprModuleName mod_name]) `thenRn_`
-- Module version changed, so check entities inside
Specifically old_local_vers ->
-- Non-empty usage list, so check item by item
- checkEntityUsage mod (iDecls ifaces) old_local_vers `thenRn` \ up_to_date ->
+ checkEntityUsage mod_name (iDecls ifaces) 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 mod]
+ doc_str = sep [ptext SLIT("need version info for"), pprModuleName mod_name]
checkEntityUsage mod decls []
= returnRn True -- Yes! All up to date!
checkEntityUsage mod decls ((occ_name,old_vers) : rest)
- = newImportedGlobalName mod occ_name `thenRn` \ name ->
+ = mkImportedGlobalName mod occ_name `thenRn` \ name ->
case lookupNameEnv decls name of
Nothing -> -- We used it before, but it ain't there now
%*********************************************************
\begin{code}
-importDecl :: Occurrence -> RnMode -> RnMG (Maybe RdrNameHsDecl)
- -- Returns Nothing for a wired-in or already-slurped decl
-
-importDecl (name, loc) mode
- = checkSlurped name `thenRn` \ already_slurped ->
- if already_slurped then
--- traceRn (sep [text "Already slurped:", ppr name]) `thenRn_`
+importDecl :: Name -> RnMG (Maybe (Module, RdrNameHsDecl))
+ -- Returns Nothing for
+ -- (a) wired in name
+ -- (b) local decl
+ -- (c) already slurped
+
+importDecl name
+ | isWiredInName name
+ = returnRn Nothing
+ | otherwise
+ = getSlurped `thenRn` \ already_slurped ->
+ if name `elemNameSet` already_slurped then
returnRn Nothing -- Already dealt with
else
- if isWiredInName name then
- getWiredInDecl name mode
- else
- getIfacesRn `thenRn` \ ifaces ->
- let
- mod = nameModule name
- in
- if mod == iMod ifaces then -- Don't bring in decls from
- addWarnRn (importDeclWarn mod name loc) `thenRn_`
--- pprTrace "importDecl wierdness:" (ppr name) $
- returnRn Nothing -- the renamed module's own interface file
- --
- else
- getNonWiredInDecl name loc mode
+ getModuleRn `thenRn` \ this_mod ->
+ let
+ mod = moduleName (nameModule name)
+ in
+ if mod == this_mod then -- Don't bring in decls from
+ -- the renamed module's own interface file
+ addWarnRn (importDeclWarn mod name) `thenRn_`
+ returnRn Nothing
+ else
+ getNonWiredInDecl name
\end{code}
\begin{code}
-getNonWiredInDecl :: Name -> SrcLoc -> RnMode -> RnMG (Maybe RdrNameHsDecl)
-getNonWiredInDecl needed_name loc mode
+getNonWiredInDecl :: Name -> RnMG (Maybe (Module, RdrNameHsDecl))
+getNonWiredInDecl needed_name
= traceRn doc_str `thenRn_`
loadHomeInterface doc_str needed_name `thenRn` \ (_, ifaces) ->
case lookupNameEnv (iDecls ifaces) needed_name of
- -- Special case for data/newtype type declarations
- Just (version, avail, TyClD tycl_decl, _) | isDataDecl tycl_decl
- -> getNonWiredDataDecl needed_name version avail tycl_decl `thenRn` \ (avail', maybe_decl) ->
- recordSlurp (Just version) necessity avail' `thenRn_`
- returnRn maybe_decl
-
- Just (version,avail,decl,_)
- -> recordSlurp (Just version) necessity avail `thenRn_`
+ Just (version,avail,_,decl)
+ -> recordSlurp (Just version) avail `thenRn_`
returnRn (Just decl)
- Nothing -> -- Can happen legitimately for "Optional" occurrences
- case necessity of {
- Optional -> addWarnRn (getDeclWarn needed_name loc);
- other -> addErrRn (getDeclErr needed_name loc)
- } `thenRn_`
- returnRn Nothing
+ Nothing -- Can happen legitimately for "Optional" occurrences
+ -> addErrRn (getDeclErr needed_name) `thenRn_`
+ returnRn Nothing
where
- necessity = modeToNecessity mode
- doc_str = sep [ptext SLIT("need decl for"), ppr needed_name, ptext SLIT("needed at"), ppr loc]
+ doc_str = ptext SLIT("need decl for") <+> ppr needed_name
\end{code}
@getWiredInDecl@ maps a wired-in @Name@ to what it makes available.
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 mode
- = setModuleRn mod_name (
- initRnMS emptyRnEnv 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.
- --
- -- Mini hack 1: no point for non-tycons/class; and if we
- -- do this we find PrelNum trying to import PackedString,
- -- because PrelBase's .hi file mentions PackedString.unpackString
- -- But PackedString.hi isn't built by that point!
- --
- -- Mini hack 2; GHC is guaranteed not to have
- -- instance decls, so it's a waste of time to read it
- --
- -- NB: We *must* look at the availName of the slurped avail,
- -- not the name passed to getWiredInDecl! Why? Because if a data constructor
- -- or class op is passed to getWiredInDecl we'll pull in the whole data/class
- -- decl, and recordSlurp will record that fact. But since the data constructor
- -- isn't a tycon/class we won't force in the home module. And even if the
- -- type constructor/class comes along later, loadDecl will say that it's already
- -- been slurped, so getWiredInDecl won't even be called. Pretty obscure bug, this was.
- let
- main_name = availName avail
- main_is_tc = case avail of { AvailTC _ _ -> True; Avail _ -> False }
- 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 == pREL_GHC then
- returnRn ()
- else
- loadHomeInterface doc_str main_name `thenRn_`
- returnRn ()
- ) `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
-
- | 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 id_mentions `thenRn_`
- returnRn (Avail (getName id))
- where
- id_mentions = nameSetToList (namesOfType ty)
- ty = idType id
-
-get_wired_tycon tycon
- | isSynTyCon tycon
- = addImplicitOccsRn (nameSetToList mentioned) `thenRn_`
- returnRn (AvailTC tc_name [tc_name])
- where
- tc_name = getName tycon
- (tyvars,ty) = getSynTyConDefn tycon
- mentioned = namesOfType ty `minusNameSet` mkNameSet (map getName tyvars)
-
-get_wired_tycon tycon
- | otherwise -- data or newtype
- = addImplicitOccsRn (nameSetToList mentioned) `thenRn_`
- returnRn (AvailTC tycon_name (tycon_name : map getName data_cons))
- where
- tycon_name = getName tycon
- data_cons = tyConDataCons tycon
- mentioned = foldr (unionNameSets . namesOfType . dataConType) emptyNameSet data_cons
-\end{code}
%* *
%*********************************************************
+@getInterfaceExports@ is called only for directly-imported modules
+
\begin{code}
-getInterfaceExports :: Module -> RnMG (Module, Avails)
-getInterfaceExports mod
- = loadInterface doc_str mod `thenRn` \ (mod, ifaces) ->
- case lookupFM (iModMap ifaces) mod of
+getInterfaceExports :: ModuleName -> WhereFrom -> RnMG (Module, Avails)
+getInterfaceExports mod_name from
+ = loadInterface doc_str mod_name from `thenRn` \ (mod, ifaces) ->
+ case lookupFM (iImpModInfo ifaces) mod_name 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 (mod, [])
- Just (_, _, avails) -> returnRn (mod, avails)
+ Just (_, _, Just (mod, _, avails)) -> returnRn (mod, avails)
where
- doc_str = sep [pprModule mod, ptext SLIT("is directly imported")]
+ doc_str = sep [pprModuleName mod_name, ptext SLIT("is directly imported")]
\end{code}
%*********************************************************
%* *
-\subsection{Data type declarations are handled specially}
+\subsection{Instance declarations are handled specially}
%* *
%*********************************************************
-Data type declarations get special treatment. If we import a data type decl
-with all its constructors, we end up importing all the types mentioned in
-the constructors' signatures, and hence {\em their} data type decls, and so on.
-In effect, we get the transitive closure of data type decls. Worse, this drags
-in tons on instance decls, and their unfoldings, and so on.
-
-If only the type constructor is mentioned, then all this is a waste of time.
-If any of the data constructors are mentioned then we really have to
-drag in the whole declaration.
-
-So when we import the type constructor for a @data@ or @newtype@ decl, we
-put it in the "deferred data/newtype decl" pile in Ifaces. Right at the end
-we slurp these decls, if they havn't already been dragged in by an occurrence
-of a constructor.
-
-\begin{code}
-getNonWiredDataDecl needed_name
- version
- avail@(AvailTC tycon_name _)
- ty_decl@(TyData new_or_data context tycon tyvars condecls derivings pragmas src_loc)
- | null condecls ||
- -- HACK ALERT! If the data type is abstract then it must from a
- -- hand-written hi-boot file. We put it in the deferred pile unconditionally,
- -- because we don't want to read it in, and then later find a decl for a constructor
- -- from that type, read the real interface file, and read in the full data type
- -- decl again!!!
-
- (needed_name == tycon_name
- && 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
- deferred_data_decls = iDefData ifaces
- new_ifaces = ifaces {iDefData = new_deferred_data_decls}
-
- no_constr_ty_decl = TyData new_or_data [] tycon tyvars [] derivings pragmas src_loc
- new_deferred_data_decls = addToNameEnv deferred_data_decls tycon_name
- (nameModule tycon_name, no_constr_ty_decl)
- -- Nota bene: we nuke both the constructors and the context in the deferred decl.
- -- If we don't nuke the context then renaming the deferred data decls can give
- -- new unresolved names (for the classes). This could be handled, but there's
- -- no point. If the data type is completely abstract then we aren't interested
- -- its context.
- in
- setIfacesRn new_ifaces `thenRn_`
- returnRn (AvailTC tycon_name [tycon_name], Nothing)
-
- | otherwise
- = -- Need a data constructor, so delete the data decl from the deferred set if it's there
- getIfacesRn `thenRn` \ ifaces ->
- let
- deferred_data_decls = iDefData ifaces
- new_ifaces = ifaces {iDefData = new_deferred_data_decls}
-
- new_deferred_data_decls = delFromNameEnv deferred_data_decls tycon_name
- in
- setIfacesRn new_ifaces `thenRn_`
- returnRn (avail, Just (TyClD ty_decl))
-\end{code}
-
\begin{code}
-getDeferredDataDecls :: RnMG [(Module, RdrNameTyClDecl)]
-getDeferredDataDecls
- = getIfacesRn `thenRn` \ ifaces ->
+getImportedInstDecls :: NameSet -> RnMG [(Module,RdrNameHsDecl)]
+getImportedInstDecls gates
+ = -- First load any orphan-instance modules that aren't aready loaded
+ -- Orphan-instance modules are recorded in the module dependecnies
+ getIfacesRn `thenRn` \ ifaces ->
let
- deferred_list = nameEnvElts (iDefData ifaces)
- trace_msg = hang (text "Slurping abstract data/newtype decls for: ")
- 4 (ppr (map fst deferred_list))
+ orphan_mods = [mod | (mod, (_, True, Nothing)) <- fmToList (iImpModInfo ifaces)]
in
- traceRn trace_msg `thenRn_`
- returnRn deferred_list
-\end{code}
-
-
-%*********************************************************
-%* *
-\subsection{Instance declarations are handled specially}
-%* *
-%*********************************************************
-
-\begin{code}
-getImportedInstDecls :: RnMG [(Module,RdrNameInstDecl)]
-getImportedInstDecls
- = -- First load any special-instance modules that aren't aready loaded
- getSpecialInstModules `thenRn` \ inst_mods ->
- mapRn_ load_it inst_mods `thenRn_`
+ traceRn (text "Loading orphan modules" <+> fsep (map pprModuleName orphan_mods)) `thenRn_`
+ mapRn_ load_it orphan_mods `thenRn_`
-- Now we're ready to grab the instance declarations
-- Find the un-gated ones and return them,
-- removing them from the bag kept in Ifaces
- getIfacesRn `thenRn` \ ifaces ->
+ getIfacesRn `thenRn` \ ifaces ->
let
- (insts, tycls_names) = iDefInsts ifaces
+ (decls, new_insts) = selectGated gates (iInsts ifaces)
+ in
+ setIfacesRn (ifaces { iInsts = new_insts }) `thenRn_`
- -- An instance decl is ungated if all its gates have been slurped
- select_ungated :: IfaceInst -- A gated inst decl
+ traceRn (sep [text "getImportedInstDecls:",
+ nest 4 (fsep (map ppr (nameSetToList gates))),
+ text "Slurped" <+> int (length decls) <+> text "instance declarations"]) `thenRn_`
+ returnRn decls
+ where
+ load_it mod = loadInterface (doc_str mod) mod ImportBySystem
+ doc_str mod = sep [pprModuleName mod, ptext SLIT("is a orphan-instance module")]
- -> ([(Module, RdrNameInstDecl)], [IfaceInst]) -- Accumulator
+getImportedRules :: RnMG [(Module,RdrNameHsDecl)]
+getImportedRules
+ = getIfacesRn `thenRn` \ ifaces ->
+ let
+ gates = iSlurp ifaces -- Anything at all that's been slurped
+ (decls, new_rules) = selectGated gates (iRules ifaces)
+ in
+ setIfacesRn (ifaces { iRules = new_rules }) `thenRn_`
+ traceRn (sep [text "getImportedRules:",
+ text "Slurped" <+> int (length decls) <+> text "rules"]) `thenRn_`
+ returnRn decls
- -> ([(Module, RdrNameInstDecl)], -- The ungated ones
- [IfaceInst]) -- Still gated, but with
- -- depeleted gates
- select_ungated (decl,gates) (ungated_decls, gated_decls)
- | isEmptyNameSet remaining_gates
- = (decl : ungated_decls, gated_decls)
- | otherwise
- = (ungated_decls, (decl, remaining_gates) : gated_decls)
- where
- remaining_gates = gates `minusNameSet` tycls_names
+selectGated gates decl_bag
+#ifdef DEBUG
+ | opt_NoPruneDecls -- Just to try the effect of not gating at all
+ = (foldrBag (\ (_,d) ds -> d:ds) [] decl_bag, emptyBag) -- Grab them all
- (un_gated_insts, still_gated_insts) = foldrBag select_ungated ([], []) insts
-
- new_ifaces = ifaces {iDefInsts = (listToBag still_gated_insts, tycls_names)}
- -- NB: don't throw away tycls_names;
- -- we may comre across more instance decls
- in
- traceRn (sep [text "getInstDecls:", fsep (map ppr (nameSetToList tycls_names))]) `thenRn_`
- setIfacesRn new_ifaces `thenRn_`
- returnRn un_gated_insts
+ | otherwise
+#endif
+ = foldrBag select ([], emptyBag) decl_bag
where
- load_it mod = loadInterface (doc_str mod) mod
- doc_str mod = sep [pprModule mod, ptext SLIT("is a special-instance module")]
-
-
-getSpecialInstModules :: RnMG [Module]
-getSpecialInstModules
- = getIfacesRn `thenRn` \ ifaces ->
- returnRn (iInstMods ifaces)
-
-getImportedFixities :: GlobalRdrEnv -> RnMG FixityEnv
- -- Get all imported fixities
- -- We first make sure that all the home modules
- -- of all in-scope variables are loaded.
-getImportedFixities gbl_env
- = let
- home_modules = [ nameModule name | names <- rdrEnvElts gbl_env,
- name <- names,
- not (isLocallyDefined name)
- ]
- in
- mapRn_ load (nub home_modules) `thenRn_`
-
- -- Now we can snaffle the fixity env
- getIfacesRn `thenRn` \ ifaces ->
- returnRn (iFixes ifaces)
+ select (reqd, decl) (yes, no)
+ | isEmptyNameSet (reqd `minusNameSet` gates) = (decl:yes, no)
+ | otherwise = (yes, (reqd,decl) `consBag` no)
+
+lookupFixity :: Name -> RnMS Fixity
+lookupFixity name
+ | isLocallyDefined name
+ = getFixityEnv `thenRn` \ local_fix_env ->
+ case lookupNameEnv local_fix_env name of
+ Just (FixitySig _ fix _) -> returnRn fix
+ Nothing -> returnRn defaultFixity
+
+ | otherwise -- Imported
+ = loadHomeInterface doc name `thenRn` \ (_, ifaces) ->
+ case lookupNameEnv (iFixes ifaces) name of
+ Just (FixitySig _ fix _) -> returnRn fix
+ Nothing -> returnRn defaultFixity
where
- load mod = loadInterface doc_str mod
- where
- doc_str = ptext SLIT("Need fixities from") <+> ppr mod
+ doc = ptext SLIT("Checking fixity for") <+> ppr name
\end{code}
A's usages, because we must recompile A to ensure that A.hi changes appropriately.
\begin{code}
-getImportVersions :: Module -- Name of this module
+getImportVersions :: ModuleName -- Name of this module
-> Maybe [IE any] -- Export list for this module
-> RnMG (VersionInfo Name) -- Version info for these names
getImportVersions this_mod exports
= getIfacesRn `thenRn` \ ifaces ->
let
- mod_map = iModMap ifaces
- imp_names = iVSlurp ifaces
+ mod_map = iImpModInfo ifaces
+ imp_names = iVSlurp ifaces
-- mv_map groups together all the things imported from a particular module.
- mv_map, mv_map_mod :: FiniteMap Module (WhatsImported Name)
+ mv_map1, mv_map2 :: FiniteMap ModuleName (WhatsImported Name)
- mv_map_mod = foldl add_mod emptyFM export_mods
- -- mv_map_mod records all the modules that have a "module M"
+ -- mv_map1 records all the modules that have a "module M"
-- 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
-
- mk_version_info (mod, local_versions)
- = case lookupFM mod_map mod of
- Just (hif, version, _) -> (mod, version, local_versions)
+ mv_map1 = foldr add_mod emptyFM export_mods
+
+ -- mv_map2 adds the version numbers of things exported individually
+ mv_map2 = foldr add_mv mv_map1 imp_names
+
+ -- Build the result list by adding info for each module,
+ -- *omitting* (a) library modules
+ -- (b) source-imported modules
+ mk_version_info mod_name (version, has_orphans, cts) so_far
+ | omit cts = so_far -- Don't record usage info for this module
+ | otherwise = (mod_name, version, has_orphans, whats_imported) : so_far
+ where
+ whats_imported = case lookupFM mv_map2 mod_name of
+ Just wi -> wi
+ Nothing -> Specifically []
+
+ omit (Just (mod, boot_import, _)) = isLibModule mod || boot_import
+ omit Nothing = False
in
- returnRn (map mk_version_info (fmToList mv_map))
+ returnRn (foldFM mk_version_info [] mod_map)
where
export_mods = case exports of
Nothing -> []
Just es -> [mod | IEModuleContents mod <- es, mod /= this_mod]
- add_mv mv_map v@(name, version)
+ add_mv v@(name, version) mv_map
= addToFM_C add_item mv_map mod (Specifically [v])
where
- mod = nameModule name
+ mod = moduleName (nameModule name)
add_item Everything _ = Everything
add_item (Specifically xs) _ = Specifically (v:xs)
- add_mod mv_map mod = addToFM mv_map mod Everything
+ add_mod mod mv_map = addToFM mv_map mod Everything
\end{code}
\begin{code}
-checkSlurped name
- = getIfacesRn `thenRn` \ ifaces ->
- returnRn (name `elemNameSet` iSlurp ifaces)
-
-getSlurpedNames :: RnMG NameSet
-getSlurpedNames
+getSlurped
= getIfacesRn `thenRn` \ ifaces ->
returnRn (iSlurp ifaces)
-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 ->
+recordSlurp maybe_version avail
+ = getIfacesRn `thenRn` \ ifaces@(Ifaces { iSlurp = slurped_names,
+ iVSlurp = imp_names }) ->
let
- Ifaces { iSlurp = slurped_names,
- iVSlurp = imp_names,
- iDefInsts = (insts, tycls_names) } = ifaces
-
new_slurped_names = addAvailToNameSet slurped_names avail
new_imp_names = case maybe_version of
Just version -> (availName avail, version) : imp_names
Nothing -> imp_names
-
- -- 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 { iSlurp = new_slurped_names,
- iVSlurp = new_imp_names,
- iDefInsts = (insts, new_tycls_names) }
in
- setIfacesRn new_ifaces
+ setIfacesRn (ifaces { iSlurp = new_slurped_names,
+ iVSlurp = new_imp_names })
\end{code}
are handled by the sourc-code specific stuff in RnNames.
\begin{code}
-getDeclBinders :: (RdrName -> SrcLoc -> RnMG Name) -- New-name function
+getDeclBinders :: (RdrName -> SrcLoc -> RnM d Name) -- New-name function
-> RdrNameHsDecl
- -> RnMG (Maybe AvailInfo)
+ -> RnM d (Maybe AvailInfo)
getDeclBinders new_name (TyClD (TyData _ _ tycon _ condecls _ _ src_loc))
= new_name tycon src_loc `thenRn` \ tycon_name ->
= new_name tycon src_loc `thenRn` \ tycon_name ->
returnRn (Just (AvailTC tycon_name [tycon_name]))
-getDeclBinders new_name (TyClD (ClassDecl _ cname _ sigs _ _ tname dname src_loc))
+getDeclBinders new_name (TyClD (ClassDecl _ cname _ sigs _ _ _ _ _ src_loc))
= new_name cname src_loc `thenRn` \ class_name ->
-- Record the names for the class ops
getDeclBinders new_name (ForD _) = returnRn Nothing
getDeclBinders new_name (DefD _) = returnRn Nothing
getDeclBinders new_name (InstD _) = returnRn Nothing
+getDeclBinders new_name (RuleD _) = returnRn Nothing
----------------
getConFieldNames new_name (ConDecl con _ _ (RecCon fielddecls) src_loc : rest)
They aren'te returned by getDeclBinders because they aren't in scope;
but they *should* be put into the DeclsMap of this module.
+Note that this excludes the default-method names of a class decl,
+and the dict fun of an instance decl, because both of these have
+bindings of their own elsewhere.
+
\begin{code}
-getDeclSysBinders new_name (TyClD (ClassDecl _ cname _ sigs _ _ tname dname src_loc))
- = new_name dname src_loc `thenRn` \ datacon_name ->
- new_name tname src_loc `thenRn` \ tycon_name ->
- returnRn [tycon_name, datacon_name]
+getDeclSysBinders new_name (TyClD (ClassDecl _ cname _ sigs _ _ tname dname snames src_loc))
+ = new_name dname src_loc `thenRn` \ datacon_name ->
+ new_name tname src_loc `thenRn` \ tycon_name ->
+ sequenceRn [new_name n src_loc | n <- snames] `thenRn` \ scsel_names ->
+ returnRn (tycon_name : datacon_name : scsel_names)
getDeclSysBinders new_name other_decl
= returnRn []
%*********************************************************
\begin{code}
-findAndReadIface :: SDoc -> Module -> RnMG (Maybe (Module, ParsedIface))
+findAndReadIface :: SDoc -> ModuleName -> WhereFrom
+ -> Bool -- Only relevant for SystemImport
+ -- True <=> Look for a .hi file
+ -- False <=> Look for .hi-boot file unless there's
+ -- a library .hi file
+ -> RnM d (Bool, Maybe (Module, ParsedIface))
+ -- Bool is True if the interface actually read was a .hi-boot one
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-findAndReadIface doc_str mod_name
+findAndReadIface doc_str mod_name from hi_file
= traceRn trace_msg `thenRn_`
-- 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 from_hi_boot `thenRn` \ himap ->
- case (lookupFM himap (moduleUserString mod_name)) of
+
+ getHiMaps `thenRn` \ hi_maps ->
+
+ case find_path from hi_maps of
-- Found the file
- Just fpath -> readIface mod_name fpath
- Nothing -> traceRn (ptext SLIT("...failed")) `thenRn_`
- returnRn Nothing
+ (hi_boot, Just (fpath, mod)) -> traceRn (ptext SLIT("...reading from") <+> text fpath) `thenRn_`
+ readIface mod fpath `thenRn` \ result ->
+ returnRn (hi_boot, result)
+ (hi_boot, Nothing) -> traceRn (ptext SLIT("...not found")) `thenRn_`
+ returnRn (hi_boot, Nothing)
where
- hif = moduleIfaceFlavour mod_name
- from_hi_boot = bootFlavour hif
+ find_path ImportByUser (hi_map, _) = (False, lookupFM hi_map mod_name)
+ find_path ImportByUserSource (_, hiboot_map) = (True, lookupFM hiboot_map mod_name)
+
+ find_path ImportBySystem (hi_map, hiboot_map)
+ | hi_file
+ = -- If the module we seek is in our dependent set,
+ -- Look for a .hi file
+ (False, lookupFM hi_map mod_name)
+
+ | otherwise
+ -- Check if there's a library module of that name
+ -- If not, look for an hi-boot file
+ = case lookupFM hi_map mod_name of
+ stuff@(Just (_, mod)) | isLibModule mod -> (False, stuff)
+ other -> (True, lookupFM hiboot_map mod_name)
trace_msg = sep [hsep [ptext SLIT("Reading"),
- if from_hi_boot then ptext SLIT("[boot]") else empty,
+ ppr from,
ptext SLIT("interface for"),
- pprModule mod_name <> semi],
+ pprModuleName mod_name <> semi],
nest 4 (ptext SLIT("reason:") <+> doc_str)]
\end{code}
@readIface@ tries just the one file.
\begin{code}
-readIface :: Module -> (String, Bool) -> RnMG (Maybe (Module, ParsedIface))
+readIface :: Module -> String -> RnM d (Maybe (Module, ParsedIface))
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-readIface requested_mod (file_path, is_dll)
- = ioToRnMG (hGetStringBuffer file_path) `thenRn` \ read_result ->
+readIface the_mod file_path
+ = ioToRnM (hGetStringBuffer file_path) `thenRn` \ read_result ->
case read_result of
Right contents ->
case parseIface contents (mkSrcLoc (mkFastString file_path) 1) of
Failed err -> failWithRn Nothing err
Succeeded (PIface mod_nm iface) ->
- (if mod_nm /= moduleFS requested_mod then
- addWarnRn (hsep [ ptext SLIT("Something is amiss; requested module name")
- , pprModule requested_mod
+ warnCheckRn (mod_nm == moduleName the_mod)
+ (hsep [ ptext SLIT("Something is amiss; requested module name")
+ , pprModule the_mod
, ptext SLIT("differs from name found in the interface file ")
- , pprEncodedFS mod_nm
- ])
- else
- returnRn ()) `thenRn_`
- let
- the_mod
- | is_dll = mkDynamicModule requested_mod
- | otherwise = requested_mod
- in
- if opt_D_show_rn_imports then
- putDocRn (hcat[ptext SLIT("Read module "), pprEncodedFS mod_nm,
- ptext SLIT(" from "), text file_path]) `thenRn_`
- returnRn (Just (the_mod, iface))
- else
- returnRn (Just (the_mod, iface))
+ , pprModuleName mod_nm
+ ]) `thenRn_`
+ returnRn (Just (the_mod, iface))
Left err
| isDoesNotExistError err -> returnRn Nothing
| otherwise -> failWithRn Nothing (cannaeReadFile file_path err)
-
-\end{code}
-
-%*********************************************************
-%* *
-\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")]
-\begin{verbatim}
-
-\begin{code}
-mkSearchPath :: Maybe String -> SearchPath
-mkSearchPath Nothing = [(".",".hi")] -- ToDo: default should be to look in
- -- the directory the module we're compiling
- -- lives.
-mkSearchPath (Just s) = go s
- where
- go "" = []
- go s =
- case span (/= '%') s of
- (dir,'%':rs) ->
- case span (/= ':') rs of
- (hisuf,_:rest) -> (dir,hisuf):go rest
- (hisuf,[]) -> [(dir,hisuf)]
\end{code}
%*********************************************************
%*********************************************************
\begin{code}
-noIfaceErr filename
- = hcat [ptext SLIT("Could not find valid interface file "),
- quotes (pprModule filename)]
+noIfaceErr filename boot_file
+ = hsep [ptext SLIT("Could not find valid"), boot,
+ ptext SLIT("interface file"), quotes (pprModule filename)]
+ where
+ boot | boot_file = ptext SLIT("[boot]")
+ | otherwise = empty
cannaeReadFile file err
= hcat [ptext SLIT("Failed in reading 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]
+getDeclErr name
+ = ptext SLIT("Failed to find interface decl for") <+> quotes (ppr name)
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
+importDeclWarn mod name
= 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
- ]
+ hsep [ptext SLIT("Interface:"), quotes (pprModuleName mod),
+ comma, ptext SLIT("name:"), quotes (ppr name)]
+warnRedundantSourceImport mod_name
+ = ptext SLIT("Unnecessary {- SOURCE -} in the import of module") <+> quotes (pprModuleName mod_name)
\end{code}
projects / ghc-hetmet.git / blobdiff