import CmdLineOpts ( DynFlag(..) )
import HsSyn ( HsModule(..), HsDecl(..), IE(..), ieName, ImportDecl(..),
- ForeignDecl(..), ForKind(..), isDynamicExtName,
- collectTopBinders
+ ForeignDecl(..),
+ collectLocatedHsBinders
)
import RdrHsSyn ( RdrNameIE, RdrNameImportDecl,
RdrNameHsModule, RdrNameHsDecl
)
-import RnIfaces ( getInterfaceExports, recordLocalSlurps )
-import RnHiFiles ( getTyClDeclBinders )
+import RnIfaces ( recordLocalSlurps )
+import RnHiFiles ( getTyClDeclBinders, loadInterface )
import RnEnv
import RnMonad
import FiniteMap
import PrelNames ( pRELUDE_Name, mAIN_Name, main_RDR_Unqual, isUnboundName )
-import UniqFM ( lookupUFM )
-import Bag ( bagToList )
import Module ( ModuleName, moduleName, WhereFrom(..) )
+import Name ( Name, nameSrcLoc, nameOccName )
import NameSet
-import Name ( Name, nameSrcLoc, nameOccName, nameEnvElts )
+import NameEnv
import HscTypes ( Provenance(..), ImportReason(..), GlobalRdrEnv,
- GenAvailInfo(..), AvailInfo, Avails, AvailEnv )
-import RdrName ( RdrName, rdrNameOcc, setRdrNameOcc )
+ GenAvailInfo(..), AvailInfo, Avails, AvailEnv,
+ Deprecations(..), ModIface(..), emptyAvailEnv
+ )
+import RdrName ( rdrNameOcc, setRdrNameOcc )
import OccName ( setOccNameSpace, dataName )
import NameSet ( elemNameSet, emptyNameSet )
import Outputable
import Maybes ( maybeToBool, catMaybes, mapMaybe )
-import UniqFM ( emptyUFM, listToUFM )
import ListSetOps ( removeDups )
import Util ( sortLt )
import List ( partition )
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) ->
-
- if null avails_by_module then
- -- If there's an error in getInterfaceExports, (e.g. interface
- -- file not found) we get lots of spurious errors from 'filterImports'
- returnRn (emptyRdrEnv, mkEmptyExportAvails imp_mod_name)
- else
+ loadInterface (ppr imp_mod_name <+> ptext SLIT("is directly imported"))
+ imp_mod_name from `thenRn` \ iface ->
let
+ imp_mod = mi_module iface
+ avails_by_module = mi_exports iface
+ deprecs = mi_deprecs iface
+
avails :: Avails
avails = [ avail | (mod_name, avails) <- avails_by_module,
mod_name /= this_mod_name,
-- then you'll get a 'B does not export AType' message. Oh well.
in
+ if null avails_by_module then
+ -- If there's an error in loadInterface, (e.g. interface
+ -- file not found) we get lots of spurious errors from 'filterImports'
+ returnRn (emptyRdrEnv, mkEmptyExportAvails imp_mod_name)
+ else
+
+ -- Complain if we import a deprecated module
+ 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
filterImports imp_mod_name from import_spec avails `thenRn` \ (filtered_avails, hides, explicits) ->
let
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
- 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 filtered_avails
in
returnRn (gbl_env, exports)
\end{code}
(_, dups) = removeDups compare all_names
in
-- Check for duplicate definitions
+ -- The complaint will come out as "Multiple declarations of Foo.f" because
+ -- since 'f' is in the env twice, the unQualInScope used by the error-msg
+ -- printer returns False. It seems awkward to fix, unfortunately.
mapRn_ (addErrRn . dupDeclErr) dups `thenRn_`
unqual_imp = True -- Want unqualified names
mk_prov n = LocalDef -- Provenance is local
hides = [] -- Hide nothing
- gbl_env = mkGlobalRdrEnv mod_name unqual_imp True hides mk_prov avails
+
+ 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
+ -- deprecated things. We may even use a deprecated thing in
+ -- the defn of a non-deprecated thing, when changing a module's
+ -- interface
+
exports = mkExportAvails mod_name unqual_imp gbl_env avails
in
returnRn (gbl_env, exports)
returnRn [avail]
getLocalDeclBinders mod (ValD binds)
- = mapRn new (bagToList (collectTopBinders binds)) `thenRn` \ avails ->
+ = mapRn new (collectLocatedHsBinders binds) `thenRn` \ avails ->
returnRn avails
where
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
\begin{code}
mkEmptyExportAvails :: ModuleName -> ExportAvails
-mkEmptyExportAvails mod_name = (unitFM mod_name [], emptyUFM)
+mkEmptyExportAvails mod_name = (unitFM mod_name [], emptyNameEnv)
mkExportAvails :: ModuleName -> Bool -> GlobalRdrEnv -> [AvailInfo] -> ExportAvails
mkExportAvails mod_name unqual_imp gbl_env avails
unqual_in_scope n = unQualInScope gbl_env n
- entity_avail_env = listToUFM [ (name,avail) | avail <- avails,
+ entity_avail_env = mkNameEnv [ (name,avail) | avail <- avails,
name <- availNames avail]
plusExportAvails :: ExportAvails -> ExportAvails -> ExportAvails
= lookupSrcName global_name_env (ieName ie) `thenRn` \ name ->
-- See what's available in the current environment
- case lookupUFM entity_avail_env name of {
+ case lookupNameEnv 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
= hsep [ptext SLIT("Duplicate"),
quotes (ptext SLIT("Module") <+> ppr mod),
ptext SLIT("in export list")]
+
+moduleDeprec mod txt
+ = sep [ ptext SLIT("Module") <+> quotes (ppr mod) <+> ptext SLIT("is deprecated:"),
+ nest 4 (ppr txt) ]
\end{code}