#include "HsVersions.h"
-import CmdLineOpts ( opt_NoImplicitPrelude, opt_WarnDuplicateExports,
- opt_SourceUnchanged, opt_WarnUnusedBinds
- )
-
-import HsSyn ( HsModule(..), HsDecl(..), TyClDecl(..),
- IE(..), ieName,
- ForeignDecl(..), ForKind(..), isDynamicExtName,
- FixitySig(..), Sig(..), ImportDecl(..),
- collectTopBinders
- )
-import RdrHsSyn ( RdrNameIE, RdrNameImportDecl,
- RdrNameHsModule, RdrNameHsDecl
- )
-import RnIfaces ( getInterfaceExports, getDeclBinders, getDeclSysBinders,
- recordSlurp, checkUpToDate
- )
+import CmdLineOpts ( DynFlag(..), opt_NoImplicitPrelude )
+
+import HsSyn ( HsModule(..), HsDecl(..), IE(..), ieName, ImportDecl(..),
+ ForeignDecl(..), ForKind(..), isDynamicExtName,
+ collectTopBinders
+ )
+import RdrHsSyn ( RdrNameIE, RdrNameImportDecl,
+ RdrNameHsModule, RdrNameHsDecl
+ )
+import RnIfaces ( getInterfaceExports, recordLocalSlurps )
+import RnHiFiles ( getTyClDeclBinders )
import RnEnv
import RnMonad
import FiniteMap
-import PrelMods
-import PrelInfo ( main_RDR )
-import UniqFM ( lookupUFM )
-import Bag ( bagToList )
-import Module ( ModuleName, mkThisModule, pprModuleName, WhereFrom(..) )
+import PrelNames ( pRELUDE_Name, mAIN_Name, main_RDR )
+import UniqFM ( lookupUFM )
+import Bag ( bagToList )
+import Module ( ModuleName, mkModuleInThisPackage, WhereFrom(..) )
import NameSet
-import Name ( Name, ExportFlag(..), ImportReason(..), Provenance(..),
- isLocallyDefined, setNameProvenance,
- nameOccName, getSrcLoc, pprProvenance, getNameProvenance
- )
-import RdrName ( RdrName, rdrNameOcc, setRdrNameOcc, mkRdrQual, mkRdrUnqual, isQual )
-import OccName ( setOccNameSpace, dataName )
-import SrcLoc ( SrcLoc )
-import NameSet ( elemNameSet, emptyNameSet )
+import Name ( Name, nameSrcLoc,
+ setLocalNameSort, nameOccName, nameEnvElts )
+import HscTypes ( Provenance(..), ImportReason(..), GlobalRdrEnv,
+ GenAvailInfo(..), AvailInfo, Avails, AvailEnv )
+import RdrName ( RdrName, rdrNameOcc, setRdrNameOcc, mkRdrQual, mkRdrUnqual, isUnqual )
+import OccName ( setOccNameSpace, dataName )
+import NameSet ( elemNameSet, emptyNameSet )
+import SrcLoc ( SrcLoc )
import Outputable
-import Maybes ( maybeToBool, catMaybes, mapMaybe )
-import UniqFM ( emptyUFM, listToUFM, plusUFM_C )
-import Unique ( getUnique )
-import Util ( removeDups, equivClassesByUniq, sortLt )
-import List ( partition )
+import Maybes ( maybeToBool, catMaybes, mapMaybe )
+import UniqFM ( emptyUFM, listToUFM )
+import ListSetOps ( removeDups )
+import Util ( sortLt )
+import List ( partition )
\end{code}
\begin{code}
getGlobalNames :: RdrNameHsModule
- -> RnMG (Maybe (ExportEnv,
- GlobalRdrEnv,
- FixityEnv, -- Fixities for local decls only
- AvailEnv -- Maps a name to its parent AvailInfo
- -- Just for in-scope things only
+ -> RnMG (Maybe (GlobalRdrEnv, -- Maps all in-scope things
+ GlobalRdrEnv, -- Maps just *local* things
+ Avails, -- The exported stuff
+ AvailEnv -- Maps a name to its parent AvailInfo
+ -- Just for in-scope things only
))
-- Nothing => no need to recompile
getGlobalNames (HsModule this_mod _ exports imports decls _ mod_loc)
= -- These two fix-loops are to get the right
-- provenance information into a Name
- fixRn (\ ~(rec_gbl_env, rec_exported_avails, _) ->
+ fixRn ( \ ~(Just (rec_gbl_env, _, rec_export_avails, _)) ->
let
rec_unqual_fn :: Name -> Bool -- Is this chap in scope unqualified?
rec_unqual_fn = unQualInScope rec_gbl_env
- rec_exp_fn :: Name -> ExportFlag
- rec_exp_fn = mk_export_fn (availsToNameSet rec_exported_avails)
+ rec_exp_fn :: Name -> Bool
+ rec_exp_fn = mk_export_fn (availsToNameSet rec_export_avails)
in
- setModuleRn this_mod $
-- PROCESS LOCAL DECLS
-- Do these *first* so that the correct provenance gets
all_avails :: ExportAvails
all_avails = foldr plusExportAvails local_mod_avails (imp_avails_s2 ++ imp_avails_s1)
+ (_, global_avail_env) = all_avails
in
- -- TRY FOR EARLY EXIT
- -- We can't go for an early exit before this because we have to check
- -- for name clashes. Consider:
- --
- -- module A where module B where
- -- import B h = True
- -- f = h
- --
- -- Suppose I've compiled everything up, and then I add a
- -- new definition to module B, that defines "f".
- --
- -- Then I must detect the name clash in A before going for an early
- -- exit. The early-exit code checks what's actually needed from B
- -- to compile A, and of course that doesn't include B.f. That's
- -- why we wait till after the plusEnv stuff to do the early-exit.
- checkEarlyExit this_mod `thenRn` \ up_to_date ->
- if up_to_date then
- returnRn (gbl_env, junk_exp_fn, Nothing)
- else
-
- -- RECORD BETTER PROVENANCES IN THE CACHE
- -- The names in the envirnoment have better provenances (e.g. imported on line x)
- -- than the names in the name cache. We update the latter now, so that we
- -- we start renaming declarations we'll get the good names
- -- The isQual is because the qualified name is always in scope
- updateProvenances (concat [names | (rdr_name, names) <- rdrEnvToList imp_gbl_env,
- isQual rdr_name]) `thenRn_`
-
- -- PROCESS EXPORT LISTS
- exportsFromAvail this_mod exports all_avails gbl_env `thenRn` \ exported_avails ->
-
- -- DONE
- returnRn (gbl_env, exported_avails, Just all_avails)
- ) `thenRn` \ (gbl_env, exported_avails, maybe_stuff) ->
-
- case maybe_stuff of {
- Nothing -> returnRn Nothing ;
- Just all_avails ->
-
- -- DEAL WITH FIXITIES
- fixitiesFromLocalDecls gbl_env decls `thenRn` \ local_fixity_env ->
- let
- -- Export only those fixities that are for names that are
- -- (a) defined in this module
- -- (b) exported
- exported_fixities :: [(Name,Fixity)]
- exported_fixities = [(name,fixity)
- | FixitySig name fixity _ <- nameEnvElts local_fixity_env,
- isLocallyDefined name
- ]
-
- -- CONSTRUCT RESULTS
- export_mods = case exports of
- Nothing -> []
- Just es -> [mod | IEModuleContents mod <- es, mod /= this_mod]
-
- export_env = ExportEnv exported_avails exported_fixities export_mods
- (_, global_avail_env) = all_avails
- in
- traceRn (text "fixity env" <+> vcat (map ppr (nameEnvElts local_fixity_env))) `thenRn_`
-
- returnRn (Just (export_env, gbl_env, local_fixity_env, global_avail_env))
- }
+ -- TRY FOR EARLY EXIT
+ -- We can't go for an early exit before this because we have to check
+ -- for name clashes. Consider:
+ --
+ -- module A where module B where
+ -- import B h = True
+ -- f = h
+ --
+ -- Suppose I've compiled everything up, and then I add a
+ -- new definition to module B, that defines "f".
+ --
+ -- Then I must detect the name clash in A before going for an early
+ -- exit. The early-exit code checks what's actually needed from B
+ -- to compile A, and of course that doesn't include B.f. That's
+ -- why we wait till after the plusEnv stuff to do the early-exit.
+
+ -- Check For early exit
+ checkErrsRn `thenRn` \ no_errs_so_far ->
+ if not no_errs_so_far then
+ -- Found errors already, so exit now
+ returnRn Nothing
+ else
+
+ -- PROCESS EXPORT LISTS
+ exportsFromAvail this_mod exports all_avails gbl_env `thenRn` \ export_avails ->
+
+
+ -- ALL DONE
+ returnRn (Just (gbl_env, local_gbl_env, export_avails, global_avail_env))
+ )
where
- junk_exp_fn = error "RnNames:export_fn"
-
all_imports = prel_imports ++ imports
-- NB: opt_NoImplicitPrelude is slightly different to import Prelude ();
\end{code}
\begin{code}
-checkEarlyExit mod
- = checkErrsRn `thenRn` \ no_errs_so_far ->
- if not no_errs_so_far then
- -- Found errors already, so exit now
- returnRn True
- else
-
- traceRn (text "Considering whether compilation is required...") `thenRn_`
- if not opt_SourceUnchanged then
- -- Source code changed and no errors yet... carry on
- traceRn (nest 4 (text "source file changed or recompilation check turned off")) `thenRn_`
- returnRn False
- else
-
- -- Unchanged source, and no errors yet; see if usage info
- -- up to date, and exit if so
- checkUpToDate mod `thenRn` \ up_to_date ->
- (if up_to_date
- then putDocRn (text "Compilation IS NOT required")
- else returnRn ()) `thenRn_`
- returnRn up_to_date
-\end{code}
-
-\begin{code}
importsFromImportDecl :: (Name -> Bool) -- OK to omit qualifier
-> RdrNameImportDecl
-> RnMG (GlobalRdrEnv,
filterImports imp_mod_name import_spec avails `thenRn` \ (filtered_avails, hides, explicits) ->
+ let
+ mk_provenance name = NonLocalDef (UserImport imp_mod iloc (name `elemNameSet` explicits))
+ (is_unqual name)
+ in
+
qualifyImports imp_mod_name
(not qual_only) -- Maybe want unqualified names
as_mod hides
- (improveAvails imp_mod iloc explicits
- is_unqual filtered_avails)
-
-
-improveAvails imp_mod iloc explicits is_unqual avails
- -- We 'improve' the provenance by setting
- -- (a) the import-reason field, so that the Name says how it came into scope
- -- including whether it's explicitly imported
- -- (b) the print-unqualified field
- = map improve_avail avails
- where
- improve_avail (Avail n) = Avail (improve n)
- improve_avail (AvailTC n ns) = AvailTC n (map improve ns) -- n doesn't matter
-
- improve name = setNameProvenance name
- (NonLocalDef (UserImport imp_mod iloc (is_explicit name))
- (is_unqual name))
- is_explicit name = name `elemNameSet` explicits
+ mk_provenance
+ filtered_avails
\end{code}
\begin{code}
importsFromLocalDecls mod_name rec_exp_fn decls
- = mapRn (getLocalDeclBinders newLocalName) decls `thenRn` \ avails_s ->
+ = mapRn (getLocalDeclBinders (newLocalName mod rec_exp_fn)) decls `thenRn` \ avails_s ->
let
avails = concat avails_s
mapRn_ (addErrRn . dupDeclErr) dups `thenRn_`
-- Record that locally-defined things are available
- mapRn_ (recordSlurp Nothing) avails `thenRn_`
+ recordLocalSlurps avails `thenRn_`
-- Build the environment
qualifyImports mod_name
- True -- Want unqualified names
- Nothing -- no 'as M'
- [] -- Hide nothing
+ True -- Want unqualified names
+ Nothing -- no 'as M'
+ [] -- Hide nothing
+ (\n -> LocalDef) -- Provenance is local
avails
-
where
- mod = mkThisModule mod_name
-
- newLocalName rdr_name loc
- = (if isQual rdr_name then
- qualNameErr (text "the binding for" <+> quotes (ppr rdr_name)) (rdr_name,loc)
- -- There should never be a qualified name in a binding position (except in instance decls)
- -- The parser doesn't check this because the same parser parses instance decls
- else
- returnRn ()) `thenRn_`
-
- newLocalTopBinder mod (rdrNameOcc rdr_name) rec_exp_fn loc
+ mod = mkModuleInThisPackage mod_name
-
-getLocalDeclBinders :: (RdrName -> SrcLoc -> RnMG Name) -- New-name function
- -> RdrNameHsDecl
- -> RnMG Avails
+---------------------------
+getLocalDeclBinders :: (RdrName -> SrcLoc -> RnMG Name)
+ -> RdrNameHsDecl -> RnMG Avails
getLocalDeclBinders new_name (ValD binds)
= mapRn do_one (bagToList (collectTopBinders binds))
where
do_one (rdr_name, loc) = new_name rdr_name loc `thenRn` \ name ->
returnRn (Avail name)
-getLocalDeclBinders new_name decl
- = getDeclBinders new_name decl `thenRn` \ maybe_avail ->
- case maybe_avail of
- Nothing -> returnRn [] -- Instance decls and suchlike
- Just avail -> getDeclSysBinders new_sys_name decl `thenRn_`
- returnRn [avail]
- where
- -- The getDeclSysBinders is just to get the names of superclass selectors
- -- etc, into the cache
- new_sys_name rdr_name loc = newImplicitBinder (rdrNameOcc rdr_name) loc
+getLocalDeclBinders new_name (TyClD tycl_decl)
+ = getTyClDeclBinders new_name tycl_decl `thenRn` \ avail ->
+ returnRn [avail]
-fixitiesFromLocalDecls :: GlobalRdrEnv -> [RdrNameHsDecl] -> RnMG FixityEnv
-fixitiesFromLocalDecls gbl_env decls
- = foldlRn getFixities emptyNameEnv decls
- where
- getFixities :: FixityEnv -> RdrNameHsDecl -> RnMG FixityEnv
- getFixities acc (FixD fix)
- = fix_decl acc fix
-
- getFixities acc (TyClD (ClassDecl _ _ _ _ sigs _ _ _ _ _ _ _))
- = foldlRn fix_decl acc [sig | FixSig sig <- sigs]
- -- Get fixities from class decl sigs too.
- getFixities acc other_decl
- = returnRn acc
-
- fix_decl acc sig@(FixitySig rdr_name fixity loc)
- = -- Check for fixity decl for something not declared
- case lookupRdrEnv gbl_env rdr_name of {
- Nothing | opt_WarnUnusedBinds
- -> pushSrcLocRn loc (addWarnRn (unusedFixityDecl rdr_name fixity))
- `thenRn_` returnRn acc
- | otherwise -> returnRn acc ;
-
- Just (name:_) ->
+getLocalDeclBinders new_name (ForD (ForeignDecl nm kind _ ext_nm _ loc))
+ | binds_haskell_name kind
+ = new_name nm loc `thenRn` \ name ->
+ returnRn [Avail name]
- -- Check for duplicate fixity decl
- case lookupNameEnv acc name of {
- Just (FixitySig _ _ loc') -> addErrRn (dupFixityDecl rdr_name loc loc')
- `thenRn_` returnRn acc ;
-
- Nothing -> returnRn (addToNameEnv acc name (FixitySig name fixity loc))
- }}
+ | otherwise -- a foreign export
+ = lookupOrigName nm `thenRn_`
+ returnRn []
+ where
+ binds_haskell_name (FoImport _) = True
+ binds_haskell_name FoLabel = True
+ binds_haskell_name FoExport = isDynamicExtName ext_nm
+
+getLocalDeclBinders new_name (FixD _) = returnRn []
+getLocalDeclBinders new_name (DeprecD _) = returnRn []
+getLocalDeclBinders new_name (DefD _) = returnRn []
+getLocalDeclBinders new_name (InstD _) = returnRn []
+getLocalDeclBinders new_name (RuleD _) = returnRn []
+
+
+---------------------------
+newLocalName mod rec_exp_fn rdr_name loc
+ = check_unqual rdr_name loc `thenRn_`
+ newTopBinder mod rdr_name loc `thenRn` \ name ->
+ returnRn (setLocalNameSort name (rec_exp_fn name))
+ where
+ -- There should never be a qualified name in a binding position (except in instance decls)
+ -- The parser doesn't check this because the same parser parses instance decls
+ check_unqual rdr_name loc
+ | isUnqual rdr_name = returnRn ()
+ | otherwise = qualNameErr (text "the binding for" <+> quotes (ppr rdr_name))
+ (rdr_name,loc)
\end{code}
+
%************************************************************************
%* *
\subsection{Filtering imports}
-> Bool -- True <=> want unqualified import
-> Maybe ModuleName -- Optional "as M" part
-> [AvailInfo] -- What's to be hidden
+ -> (Name -> Provenance)
-> Avails -- Whats imported and how
-> RnMG (GlobalRdrEnv, ExportAvails)
-qualifyImports this_mod unqual_imp as_mod hides avails
+qualifyImports this_mod unqual_imp as_mod hides mk_provenance avails
=
-- Make the name environment. We're talking about a
-- single module here, so there must be no name clashes.
| unqual_imp = env2
| otherwise = env1
where
- env1 = addOneToGlobalRdrEnv env (mkRdrQual qual_mod occ) name
- env2 = addOneToGlobalRdrEnv env1 (mkRdrUnqual occ) name
+ env1 = addOneToGlobalRdrEnv env (mkRdrQual qual_mod occ) (name,prov)
+ env2 = addOneToGlobalRdrEnv env1 (mkRdrUnqual occ) (name,prov)
occ = nameOccName name
+ prov = mk_provenance name
del_avail env avail = foldl delOneFromGlobalRdrEnv env rdr_names
where
exportsFromAvail this_mod (Just export_items)
(mod_avail_env, entity_avail_env)
global_name_env
- = foldlRn exports_from_item
- ([], emptyFM, emptyAvailEnv) export_items `thenRn` \ (_, _, export_avail_map) ->
+ = doptRn Opt_WarnDuplicateExports `thenRn` \ warn_dup_exports ->
+ foldlRn (exports_from_item warn_dup_exports)
+ ([], emptyFM, emptyAvailEnv) export_items
+ `thenRn` \ (_, _, export_avail_map) ->
let
export_avails :: [AvailInfo]
export_avails = nameEnvElts export_avail_map
returnRn export_avails
where
- exports_from_item :: ExportAccum -> RdrNameIE -> RnMG ExportAccum
+ exports_from_item :: Bool -> ExportAccum -> RdrNameIE -> RnMG ExportAccum
- exports_from_item acc@(mods, occs, avails) ie@(IEModuleContents mod)
+ exports_from_item warn_dups acc@(mods, occs, avails) ie@(IEModuleContents mod)
| mod `elem` mods -- Duplicate export of M
- = warnCheckRn opt_WarnDuplicateExports
- (dupModuleExport mod) `thenRn_`
+ = warnCheckRn warn_dups (dupModuleExport mod) `thenRn_`
returnRn acc
| otherwise
in
returnRn (mod:mods, occs', avails')
- exports_from_item acc@(mods, occs, avails) ie
+ exports_from_item warn_dups acc@(mods, occs, avails) ie
| not (maybeToBool maybe_in_scope)
= failWithRn acc (unknownNameErr (ieName ie))
| not (null dup_names)
- = addNameClashErrRn rdr_name (name:dup_names) `thenRn_`
+ = addNameClashErrRn rdr_name ((name,prov):dup_names) `thenRn_`
returnRn acc
#ifdef DEBUG
where
rdr_name = ieName ie
maybe_in_scope = lookupFM global_name_env rdr_name
- Just (name:dup_names) = maybe_in_scope
+ Just ((name,prov):dup_names) = maybe_in_scope
maybe_avail = lookupUFM entity_avail_env name
Just avail = maybe_avail
maybe_export_avail = filterAvail ie avail
check_occs :: RdrNameIE -> ExportOccMap -> AvailInfo -> RnMG ExportOccMap
check_occs ie occs avail
- = foldlRn check occs (availNames avail)
+ = doptRn Opt_WarnDuplicateExports `thenRn` \ warn_dup_exports ->
+ foldlRn (check warn_dup_exports) occs (availNames avail)
where
- check occs name
+ check warn_dup occs name
= case lookupFM occs name_occ of
Nothing -> returnRn (addToFM occs name_occ (name, ie))
Just (name', ie')
| name == name' -> -- Duplicate export
- warnCheckRn opt_WarnDuplicateExports
+ warnCheckRn warn_dup
(dupExportWarn name_occ ie ie')
`thenRn_` returnRn occs
where
name_occ = nameOccName name
-mk_export_fn :: NameSet -> (Name -> ExportFlag)
-mk_export_fn exported_names
- = \name -> if name `elemNameSet` exported_names
- then Exported
- else NotExported
+mk_export_fn :: NameSet -> (Name -> Bool) -- True => exported
+mk_export_fn exported_names = \name -> name `elemNameSet` exported_names
\end{code}
%************************************************************************
\begin{code}
badImportItemErr mod ie
- = sep [ptext SLIT("Module"), quotes (pprModuleName mod),
+ = sep [ptext SLIT("Module"), quotes (ppr mod),
ptext SLIT("does not export"), quotes (ppr ie)]
dodgyImportWarn mod item = dodgyMsg (ptext SLIT("import")) item
ptext SLIT("but it has none; it is a type synonym or abstract type or class") ]
modExportErr mod
- = hsep [ ptext SLIT("Unknown module in export list: module"), quotes (pprModuleName mod)]
+ = hsep [ ptext SLIT("Unknown module in export list: module"), quotes (ppr mod)]
exportItemErr export_item
= sep [ ptext SLIT("The export item") <+> quotes (ppr export_item),
dupDeclErr (n:ns)
= vcat [ptext SLIT("Multiple declarations of") <+> quotes (ppr n),
- nest 4 (vcat (map pp sorted_ns))]
+ nest 4 (vcat (map ppr sorted_locs))]
where
- sorted_ns = sortLt occ'ed_before (n:ns)
-
- occ'ed_before a b = LT == compare (getSrcLoc a) (getSrcLoc b)
-
- pp n = pprProvenance (getNameProvenance n)
+ sorted_locs = sortLt occ'ed_before (map nameSrcLoc (n:ns))
+ occ'ed_before a b = LT == compare a b
dupExportWarn occ_name ie1 ie2
= hsep [quotes (ppr occ_name),
dupModuleExport mod
= hsep [ptext SLIT("Duplicate"),
- quotes (ptext SLIT("Module") <+> pprModuleName mod),
+ quotes (ptext SLIT("Module") <+> ppr mod),
ptext SLIT("in export list")]
-
-unusedFixityDecl rdr_name fixity
- = hsep [ptext SLIT("Unused fixity declaration for"), quotes (ppr rdr_name)]
-
-dupFixityDecl rdr_name loc1 loc2
- = vcat [ptext SLIT("Multiple fixity declarations for") <+> quotes (ppr rdr_name),
- ptext SLIT("at ") <+> ppr loc1,
- ptext SLIT("and") <+> ppr loc2]
\end{code}
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