import CmdLineOpts ( DynFlag(..) )
import HsSyn ( HsModule(..), HsDecl(..), IE(..), ieName, ImportDecl(..),
- ForeignDecl(..), ForKind(..), isDynamicExtName,
+ ForeignDecl(..),
collectLocatedHsBinders
)
import RdrHsSyn ( RdrNameIE, RdrNameImportDecl,
import NameEnv
import HscTypes ( Provenance(..), ImportReason(..), GlobalRdrEnv,
GenAvailInfo(..), AvailInfo, Avails, AvailEnv,
- Deprecations(..), ModIface(..)
+ Deprecations(..), ModIface(..), emptyAvailEnv
)
import RdrName ( rdrNameOcc, setRdrNameOcc )
import OccName ( setOccNameSpace, dataName )
else
-- Complain if we import a deprecated module
- (case deprecs of
- DeprecAll txt -> addWarnRn (moduleDeprec imp_mod_name txt)
- other -> returnRn ()
+ ifOptRn Opt_WarnDeprecations (
+ case deprecs of
+ DeprecAll txt -> addWarnRn (moduleDeprec imp_mod_name txt)
+ other -> returnRn ()
) `thenRn_`
-- Filter the imports according to the import list
Just another_name -> another_name
mk_prov name = NonLocalDef (UserImport imp_mod iloc (name `elemNameSet` explicits))
- gbl_env = mkGlobalRdrEnv qual_mod unqual_imp True hides mk_prov filtered_avails deprecs
- exports = mkExportAvails qual_mod unqual_imp gbl_env filtered_avails
+ gbl_env = mkGlobalRdrEnv qual_mod unqual_imp mk_prov filtered_avails hides deprecs
+ exports = mkExportAvails qual_mod unqual_imp gbl_env hides filtered_avails
in
returnRn (gbl_env, exports)
\end{code}
mk_prov n = LocalDef -- Provenance is local
hides = [] -- Hide nothing
- gbl_env = mkGlobalRdrEnv mod_name unqual_imp True hides mk_prov avails NoDeprecs
+ gbl_env = mkGlobalRdrEnv mod_name unqual_imp mk_prov avails hides NoDeprecs
-- NoDeprecs: don't complain about locally defined names
-- For a start, we may be exporting a deprecated thing
-- Also we may use a deprecated thing in the defn of another
-- the defn of a non-deprecated thing, when changing a module's
-- interface
- exports = mkExportAvails mod_name unqual_imp gbl_env avails
+ exports = mkExportAvails mod_name unqual_imp gbl_env hides avails
in
returnRn (gbl_env, exports)
new (rdr_name, loc) = newTopBinder mod rdr_name loc `thenRn` \ name ->
returnRn (Avail name)
-getLocalDeclBinders mod (ForD (ForeignDecl nm kind _ ext_nm _ loc))
- | binds_haskell_name kind
+getLocalDeclBinders mod (ForD (ForeignImport nm _ _ loc))
= newTopBinder mod nm loc `thenRn` \ name ->
returnRn [Avail name]
-
- | otherwise -- a foreign export
+getLocalDeclBinders mod (ForD _)
= returnRn []
- where
- binds_haskell_name (FoImport _) = True
- binds_haskell_name FoLabel = True
- binds_haskell_name FoExport = isDynamicExtName ext_nm
getLocalDeclBinders mod (FixD _) = returnRn []
getLocalDeclBinders mod (DeprecD _) = returnRn []
-> 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
- [AvailInfo], -- What's to be hidden
- -- (the unqualified version, that is)
- -- (We need to return both the above sets, because
- -- the qualified version is never hidden; so we can't
- -- implement hiding by reducing what's imported.)
+ -> RnMG ([AvailInfo], -- "chosens"
+ [AvailInfo], -- "hides"
+ -- The true imports are "chosens" - "hides"
+ -- (It's convenient to return both the above sets, because
+ -- the substraction can be done more efficiently when
+ -- building the environment.)
NameSet) -- What was imported explicitly
-- Complains if import spec mentions things that the module doesn't export
bale_out item = addErrRn (badImportItemErr mod from item) `thenRn_`
returnRn []
+ get_item :: RdrNameIE -> RnMG [(AvailInfo, [Name])]
get_item item@(IEModuleContents _) = bale_out item
get_item item@(IEThingAll _)
Just avail@(AvailTC _ [n]) -> -- This occurs when you import T(..), but
-- only export T abstractly. The single [n]
-- in the AvailTC is the type or class itself
- addWarnRn (dodgyImportWarn mod item) `thenRn_`
+ ifOptRn Opt_WarnMisc (addWarnRn (dodgyImportWarn mod item)) `thenRn_`
returnRn [(avail, [availName avail])]
Just avail -> returnRn [(avail, [availName avail])]
get_item item@(IEThingAbs n)
| want_hiding -- hiding( C )
-- Here the 'C' can be a data constructor *or* a type/class
- = case catMaybes [check_item item, check_item (IEThingAbs data_n)] of
+ = case catMaybes [check_item item, check_item (IEVar data_n)] of
[] -> bale_out item
avails -> returnRn [(a, []) | a <- avails]
-- The 'explicits' list is irrelevant when hiding
mkEmptyExportAvails :: ModuleName -> ExportAvails
mkEmptyExportAvails mod_name = (unitFM mod_name [], emptyNameEnv)
-mkExportAvails :: ModuleName -> Bool -> GlobalRdrEnv -> [AvailInfo] -> ExportAvails
-mkExportAvails mod_name unqual_imp gbl_env avails
+mkExportAvails :: ModuleName -> Bool -> GlobalRdrEnv -> [AvailInfo] -> [AvailInfo] -> ExportAvails
+mkExportAvails mod_name unqual_imp gbl_env hides avails
= (mod_avail_env, entity_avail_env)
where
mod_avail_env = unitFM mod_name unqual_avails
| otherwise = mapMaybe prune avails
prune (Avail n) | unqual_in_scope n = Just (Avail n)
- prune (Avail n) | otherwise = Nothing
+ | otherwise = Nothing
prune (AvailTC n ns) | null uqs = Nothing
| otherwise = Just (AvailTC n uqs)
where
unqual_in_scope n = unQualInScope gbl_env n
- entity_avail_env = mkNameEnv [ (name,avail) | avail <- avails,
- name <- availNames avail]
+
+ entity_avail_env = mkNameEnv ([ (availName avail,avail) | avail <- effective_avails ] ++
+ -- sigh - need to have the method/field names in
+ -- the environment also, so that export lists
+ -- can be computed precisely (cf. exportsFromAvail)
+ [ (name,avail) | avail <- effective_avails,
+ name <- availNames avail ])
+
+ -- remove 'hides' names from the avail list.
+ effective_avails = foldl wipeOut avails hides
+ where
+ wipeOut as (Avail n) = mapMaybe (delName n) as
+ wipeOut as (AvailTC n ns) = foldl wipeOut as (map Avail ns)
+
+ delName x a@(Avail n)
+ | n == x = Nothing
+ | otherwise = Just a
+ delName x (AvailTC n ns)
+ = case (filter (/=x) ns) of
+ [] -> Nothing
+ xs -> Just (AvailTC n xs)
plusExportAvails :: ExportAvails -> ExportAvails -> ExportAvails
plusExportAvails (m1, e1) (m2, e2)
projects / ghc-hetmet.git / blobdiff