import RnMonad
import FiniteMap
-import PrelNames ( pRELUDE_Name, mAIN_Name, main_RDR )
+import PrelNames ( pRELUDE_Name, mAIN_Name, main_RDR_Unqual, isUnboundName )
import UniqFM ( lookupUFM )
import Bag ( bagToList )
import Module ( ModuleName, moduleName, WhereFrom(..) )
fixRn ( \ ~(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 -> Bool
rec_exp_fn = mk_export_fn (availsToNameSet rec_export_avails)
in
is_source_import (ImportDecl _ ImportByUserSource _ _ _ _) = True
is_source_import other = False
- get_imports = importsFromImportDecl this_mod_name rec_unqual_fn
+ get_imports = importsFromImportDecl this_mod_name
in
mapAndUnzipRn get_imports ordinary `thenRn` \ (imp_gbl_envs1, imp_avails_s1) ->
mapAndUnzipRn get_imports source `thenRn` \ (imp_gbl_envs2, imp_avails_s2) ->
\begin{code}
importsFromImportDecl :: ModuleName
- -> (Name -> Bool) -- OK to omit qualifier
-> RdrNameImportDecl
-> RnMG (GlobalRdrEnv,
ExportAvails)
-importsFromImportDecl this_mod_name is_unqual (ImportDecl imp_mod_name from qual_only as_mod import_spec iloc)
+importsFromImportDecl this_mod_name (ImportDecl imp_mod_name from qual_only as_mod import_spec iloc)
= pushSrcLocRn iloc $
getInterfaceExports imp_mod_name from `thenRn` \ (imp_mod, avails_by_module) ->
-- then you'll get a 'B does not export AType' message. Oh well.
in
- filterImports imp_mod_name import_spec avails `thenRn` \ (filtered_avails, hides, explicits) ->
+ filterImports imp_mod_name from 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
\begin{code}
filterImports :: ModuleName -- The module being imported
+ -> WhereFrom -- Tells whether it's a {-# SOURCE #-} import
-> Maybe (Bool, [RdrNameIE]) -- Import spec; True => hiding
-> [AvailInfo] -- What's available
-> RnMG ([AvailInfo], -- What's actually imported
-- Complains if import spec mentions things that the module doesn't export
-- Warns/informs if import spec contains duplicates.
-filterImports mod Nothing imports
+filterImports mod from Nothing imports
= returnRn (imports, [], emptyNameSet)
-filterImports mod (Just (want_hiding, import_items)) total_avails
+filterImports mod from (Just (want_hiding, import_items)) total_avails
= flatMapRn get_item import_items `thenRn` \ avails_w_explicits ->
let
(item_avails, explicits_s) = unzip avails_w_explicits
-- they won't make any difference because naked entities like T
-- in an import list map to TcOccs, not VarOccs.
- bale_out item = addErrRn (badImportItemErr mod item) `thenRn_`
+ bale_out item = addErrRn (badImportItemErr mod from item) `thenRn_`
returnRn []
get_item item@(IEModuleContents _) = bale_out item
= exportsFromAvail this_mod true_exports export_avails global_name_env
where
true_exports = Just $ if this_mod == mAIN_Name
- then [IEVar main_RDR]
+ then [IEVar main_RDR_Unqual]
-- export Main.main *only* unless otherwise specified,
else [IEModuleContents this_mod]
-- but for all other modules export everything.
returnRn (mod:mods, occs', avails')
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,prov):dup_names) `thenRn_`
- returnRn acc
+ = lookupSrcName global_name_env (ieName ie) `thenRn` \ name ->
-#ifdef DEBUG
- -- I can't see why this should ever happen; if the thing is in scope
- -- at all it ought to have some availability
- | not (maybeToBool maybe_avail)
- = pprTrace "exportsFromAvail: curious Nothing:" (ppr name)
- returnRn acc
-#endif
+ -- See what's available in the current environment
+ case lookupUFM entity_avail_env name of {
+ Nothing -> -- Presumably this happens because lookupSrcName didn't find
+ -- the name and returned an unboundName, which won't be in
+ -- the entity_avail_env, of course
+ WARN( not (isUnboundName name), ppr name )
+ returnRn acc ;
- | not enough_avail
- = failWithRn acc (exportItemErr ie)
+ Just avail ->
- | otherwise -- Phew! It's OK! Now to check the occurrence stuff!
+ -- Filter out the bits we want
+ case filterAvail ie avail of {
+ Nothing -> -- Not enough availability
+ failWithRn acc (exportItemErr ie) ;
+ Just export_avail ->
- = warnCheckRn (ok_item ie avail) (dodgyExportWarn ie) `thenRn_`
+ -- Phew! It's OK! Now to check the occurrence stuff!
+ warnCheckRn (ok_item ie avail) (dodgyExportWarn ie) `thenRn_`
check_occs ie occs export_avail `thenRn` \ occs' ->
returnRn (mods, occs', addAvail avails export_avail)
+ }}
- where
- rdr_name = ieName ie
- maybe_in_scope = lookupFM global_name_env rdr_name
- 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
- enough_avail = maybeToBool maybe_export_avail
- Just export_avail = maybe_export_avail
-
- ok_item (IEThingAll _) (AvailTC _ [n]) = False
- -- This occurs when you import T(..), but
- -- only export T abstractly. The single [n]
- -- in the AvailTC is the type or class itself
- ok_item _ _ = True
+
+
+ok_item (IEThingAll _) (AvailTC _ [n]) = False
+ -- This occurs when you import T(..), but
+ -- only export T abstractly. The single [n]
+ -- in the AvailTC is the type or class itself
+ok_item _ _ = True
check_occs :: RdrNameIE -> ExportOccMap -> AvailInfo -> RnMG ExportOccMap
check_occs ie occs avail
%************************************************************************
\begin{code}
-badImportItemErr mod ie
- = sep [ptext SLIT("Module"), quotes (ppr mod),
+badImportItemErr mod from ie
+ = sep [ptext SLIT("Module"), quotes (ppr mod), source_import,
ptext SLIT("does not export"), quotes (ppr ie)]
+ where
+ source_import = case from of
+ ImportByUserSource -> ptext SLIT("(hi-boot interface)")
+ other -> empty
dodgyImportWarn mod item = dodgyMsg (ptext SLIT("import")) item
dodgyExportWarn item = dodgyMsg (ptext SLIT("export")) item
projects / ghc-hetmet.git / blobdiff