module Rename ( renameModule ) where
+#if __GLASGOW_HASKELL__ <= 201
import PreludeGlaST ( thenPrimIO )
+#else
+import GlaExts
+import IO
+#endif
IMP_Ubiq()
IMPORT_1_3(List(partition))
import HsSyn
-import RdrHsSyn ( RdrName, SYN_IE(RdrNameHsModule), SYN_IE(RdrNameImportDecl) )
+import RdrHsSyn ( RdrName(..), SYN_IE(RdrNameHsModule), SYN_IE(RdrNameImportDecl) )
import RnHsSyn ( SYN_IE(RenamedHsModule), SYN_IE(RenamedHsDecl), extractHsTyNames )
-import CmdLineOpts ( opt_HiMap )
+import CmdLineOpts ( opt_HiMap, opt_WarnNameShadowing, opt_D_show_rn_trace,
+ opt_D_dump_rn, opt_D_show_passes
+ )
import RnMonad
import RnNames ( getGlobalNames )
import RnSource ( rnDecl )
import RnIfaces ( getImportedInstDecls, importDecl, getImportVersions, getSpecialInstModules,
- mkSearchPath
+ getDeferredDataDecls,
+ mkSearchPath, getSlurpedNames, getRnStats
)
import RnEnv ( availsToNameSet, addAvailToNameSet,
addImplicitOccsRn, lookupImplicitOccRn )
import Id ( GenId {- instance NamedThing -} )
import Name ( Name, Provenance, ExportFlag(..), isLocallyDefined,
- NameSet(..), elemNameSet, mkNameSet, unionNameSets, nameSetToList,
- isWiredInName, modAndOcc
+ NameSet(..), elemNameSet, mkNameSet, unionNameSets,
+ nameSetToList, minusNameSet, NamedThing(..),
+ modAndOcc, pprModule, pprOccName, nameOccName
)
import TysWiredIn ( unitTyCon, intTyCon, doubleTyCon )
import PrelInfo ( ioTyCon_NAME, primIoTyCon_NAME )
import FiniteMap ( emptyFM, eltsFM, fmToList, addToFM, FiniteMap )
import Pretty
import PprStyle ( PprStyle(..) )
-import Util ( panic, assertPanic, pprTrace )
+import Util ( cmpPString, equivClasses, panic, assertPanic, pprTrace )
+#if __GLASGOW_HASKELL__ >= 202
+import UniqSupply
+#endif
\end{code}
case global_name_info of {
Nothing -> -- Everything is up to date; no need to recompile further
+ rnStats [] `thenRn_`
returnRn Nothing ;
-- Otherwise, just carry on
- Just (export_env, rn_env, local_avails) ->
+ Just (export_env, rn_env, explicit_names) ->
-- RENAME THE SOURCE
initRnMS rn_env mod_name SourceMode (
getImportVersions mod_name exports `thenRn` \ import_versions ->
getNameSupplyRn `thenRn` \ name_supply ->
+ -- REPORT UNUSED NAMES
+ reportUnusedNames explicit_names `thenRn_`
-- GENERATE THE SPECIAL-INSTANCE MODULE LIST
-- The "special instance" modules are those modules that contain instance
in
-
-- RETURN THE RENAMED MODULE
let
import_mods = [mod | ImportDecl mod _ _ _ _ <- imports]
rn_all_decls
loc
in
+ rnStats rn_all_decls `thenRn_`
returnRn (Just (renamed_module,
(import_versions, export_env, special_inst_mods),
name_supply,
case maybe_unresolved of
-- No more unresolved names
- Nothing -> -- Slurp instance declarations
+ Nothing -> -- Instance decls still pending?
getImportedInstDecls `thenRn` \ inst_decls ->
- traceRn (ppSep [ppPStr SLIT("Slurped"), ppInt (length inst_decls), ppPStr SLIT("instance decls")])
+ traceRn (sep [ptext SLIT("Slurped"), int (length inst_decls), ptext SLIT("instance decls")])
`thenRn_`
-
- -- None? then at last we are done
- if null inst_decls then
- returnRn decls
- else
- mapRn rn_inst_decl inst_decls `thenRn` \ new_inst_decls ->
-
- -- We *must* loop again here. Why? Two reasons:
- -- (a) an instance decl will give rise to an unresolved dfun, whose
- -- decl we must slurp to get its version number; that's the version
- -- number for the whole instance decl.
- -- (b) an instance decl might give rise to a new unresolved class,
- -- whose decl we must slurp, which might let in some new instance decls,
- -- and so on. Example: instance Foo a => Baz [a] where ...
-
- closeDecls (new_inst_decls ++ decls)
+ if not (null inst_decls) then
+ mapRn rn_inst_decl inst_decls `thenRn` \ new_inst_decls ->
+
+ -- We *must* loop again here. Why? Two reasons:
+ -- (a) an instance decl will give rise to an unresolved dfun, whose
+ -- decl we must slurp to get its version number; that's the version
+ -- number for the whole instance decl. (And its unfolding might mention new
+ -- unresolved names.)
+ -- (b) an instance decl might give rise to a new unresolved class,
+ -- whose decl we must slurp, which might let in some new instance decls,
+ -- and so on. Example: instance Foo a => Baz [a] where ...
+
+ closeDecls (new_inst_decls ++ decls)
+ else
+
+ -- No more instance decls, so all we have left is
+ -- to deal with the deferred data type decls.
+ getDeferredDataDecls `thenRn` \ data_decls ->
+ mapRn rn_data_decl data_decls `thenRn` \ rn_data_decls ->
+ returnRn (rn_data_decls ++ decls)
-- An unresolved name
Just (name,necessity)
-> -- Slurp its declaration, if any
--- traceRn (ppSep [ppPStr SLIT("Considering"), ppr PprDebug name]) `thenRn_`
+-- traceRn (sep [ptext SLIT("Considering"), ppr PprDebug name]) `thenRn_`
importDecl name necessity `thenRn` \ maybe_decl ->
case maybe_decl of
-- Found a declaration... rename it
Just decl -> rn_iface_decl mod_name decl `thenRn` \ new_decl ->
closeDecls (new_decl : decls)
- where
- (mod_name,_) = modAndOcc name
- where
+ where
+ (mod_name,_) = modAndOcc name
+
+
+rn_iface_decl mod_name decl = initRnMS emptyRnEnv mod_name InterfaceMode (rnDecl decl)
-- Notice that the rnEnv starts empty
- rn_iface_decl mod_name decl = initRnMS emptyRnEnv mod_name InterfaceMode (rnDecl decl)
- rn_inst_decl (mod_name,decl) = rn_iface_decl mod_name (InstD decl)
+rn_inst_decl (mod_name,decl) = rn_iface_decl mod_name (InstD decl)
+
+rn_data_decl (tycon_name,ty_decl) = rn_iface_decl mod_name (TyD ty_decl)
+ where
+ (mod_name, _) = modAndOcc tycon_name
\end{code}
+\begin{code}
+reportUnusedNames explicit_avail_names
+ | not opt_WarnNameShadowing
+ = returnRn ()
+
+ | otherwise
+ = getSlurpedNames `thenRn` \ slurped_names ->
+ let
+ unused = explicit_avail_names `minusNameSet` slurped_names
+ (local_unused, imported_unused) = partition isLocallyDefined (nameSetToList unused)
+ imports_by_module = equivClasses cmp imported_unused
+ name1 `cmp` name2 = nameModule name1 `_CMP_STRING_` nameModule name2
+
+ pp_imp sty = sep [text "For information: the following unqualified imports are unused:",
+ nest 4 (vcat (map (pp_group sty) imports_by_module))]
+ pp_group sty (n:ns) = sep [hcat [text "Module ", pprModule PprForUser (nameModule n), char ':'],
+ nest 4 (sep (map (pprOccName sty . nameOccName) (n:ns)))]
+
+ pp_local sty = sep [text "For information: the following local top-level definitions are unused:",
+ nest 4 (sep (map (pprOccName sty . nameOccName) local_unused))]
+ in
+ (if null imported_unused
+ then returnRn ()
+ else addWarnRn pp_imp) `thenRn_`
+
+ (if null local_unused
+ then returnRn ()
+ else addWarnRn pp_local)
+
+nameModule n = fst (modAndOcc n)
+
+rnStats :: [RenamedHsDecl] -> RnMG ()
+rnStats all_decls
+ | opt_D_show_rn_trace ||
+ opt_D_dump_rn ||
+ opt_D_show_passes
+ = getRnStats all_decls `thenRn` \ msg ->
+ ioToRnMG (hPutStr stderr (show msg) >>
+ hPutStr stderr "\n") `thenRn_`
+ returnRn ()
+
+ | otherwise = returnRn ()
+\end{code}
projects / ghc-hetmet.git / blobdiff