import HsSyn
import RdrHsSyn ( RdrNameIE )
import RdrName ( RdrName, rdrNameModule, rdrNameOcc, isQual, isUnqual,
- mkRdrUnqual, qualifyRdrName
+ mkRdrUnqual, qualifyRdrName, lookupRdrEnv
)
-import HsTypes ( hsTyVarName, hsTyVarNames, replaceTyVarName )
+import HsTypes ( hsTyVarName, replaceTyVarName )
import HscTypes ( Provenance(..), pprNameProvenance, hasBetterProv,
- ImportReason(..), GlobalRdrEnv, Avails, AvailEnv,
- AvailInfo, GenAvailInfo(..), RdrAvailInfo )
+ ImportReason(..), GlobalRdrEnv, AvailEnv,
+ AvailInfo, Avails, GenAvailInfo(..), RdrAvailInfo )
import RnMonad
import Name ( Name, NamedThing(..),
getSrcLoc,
mkLocalName, mkImportedLocalName, mkGlobalName,
- mkIPName, isLocallyDefined,
- nameOccName, nameModule,
+ mkIPName, nameOccName, nameModule,
extendNameEnv_C, plusNameEnv_C, nameEnvElts,
setNameModuleAndLoc
)
import NameSet
import OccName ( OccName, occNameUserString, occNameFlavour )
-import Module ( ModuleName, moduleName, mkVanillaModule )
+import Module ( ModuleName, moduleName, mkVanillaModule, mkSysModuleNameFS, moduleNameFS )
import FiniteMap
import Unique ( Unique )
import UniqSupply
import SrcLoc ( SrcLoc, noSrcLoc )
import Outputable
import ListSetOps ( removeDups, equivClasses )
-import Util ( thenCmp, sortLt )
+import Util ( sortLt )
import List ( nub )
import PrelNames ( mkUnboundName )
import CmdLineOpts
+import FastString ( FastString )
\end{code}
%*********************************************************
failWithRn (mkUnboundName rdr_name)
(unknownNameErr rdr_name)
}
+
+lookupGlobalRn :: GlobalRdrEnv -> RdrName -> RnM d (Maybe Name)
+ -- Checks that there is exactly one
+lookupGlobalRn global_env rdr_name
+ = case lookupRdrEnv global_env rdr_name of
+ Just [(name,_)] -> returnRn (Just name)
+ Just stuff@((name,_):_) -> addNameClashErrRn rdr_name stuff `thenRn_`
+ returnRn (Just name)
+ Nothing -> returnRn Nothing
\end{code}
%
Just name -> pushSrcLocRn loc $
addWarnRn (shadowedNameWarn rdr_name)
-bindCoreLocalFVRn :: RdrName -> (Name -> RnMS (a, FreeVars))
- -> RnMS (a, FreeVars)
+bindCoreLocalRn :: RdrName -> (Name -> RnMS a) -> RnMS a
-- A specialised variant when renaming stuff from interface
-- files (of which there is a lot)
-- * one at a time
-- * no checks for shadowing
-- * always imported
-- * deal with free vars
-bindCoreLocalFVRn rdr_name enclosed_scope
+bindCoreLocalRn rdr_name enclosed_scope
= getSrcLocRn `thenRn` \ loc ->
getLocalNameEnv `thenRn` \ name_env ->
getNameSupplyRn `thenRn` \ (us, cache, ipcache) ->
let
new_name_env = extendRdrEnv name_env rdr_name name
in
- setLocalNameEnv new_name_env (enclosed_scope name) `thenRn` \ (result, fvs) ->
- returnRn (result, delFromNameSet fvs name)
+ setLocalNameEnv new_name_env (enclosed_scope name)
-bindCoreLocalsFVRn [] thing_inside = thing_inside []
-bindCoreLocalsFVRn (b:bs) thing_inside = bindCoreLocalFVRn b $ \ name' ->
- bindCoreLocalsFVRn bs $ \ names' ->
- thing_inside (name':names')
+bindCoreLocalsRn [] thing_inside = thing_inside []
+bindCoreLocalsRn (b:bs) thing_inside = bindCoreLocalRn b $ \ name' ->
+ bindCoreLocalsRn bs $ \ names' ->
+ thing_inside (name':names')
bindLocalNames names enclosed_scope
= getLocalNameEnv `thenRn` \ name_env ->
returnRn (thing, delListFromNameSet fvs names)
-------------------------------------
-bindUVarRn :: SDoc -> RdrName -> (Name -> RnMS (a, FreeVars)) -> RnMS (a, FreeVars)
-bindUVarRn = bindLocalRn
+bindUVarRn :: RdrName -> (Name -> RnMS a) -> RnMS a
+bindUVarRn = bindCoreLocalRn
-------------------------------------
extendTyVarEnvFVRn :: [Name] -> RnMS (a, FreeVars) -> RnMS (a, FreeVars)
availNames (Avail n) = [n]
availNames (AvailTC n ns) = ns
+-------------------------------------
addSysAvails :: AvailInfo -> [Name] -> AvailInfo
addSysAvails avail [] = avail
addSysAvails (AvailTC n ns) sys = AvailTC n (sys ++ ns)
+-------------------------------------
rdrAvailInfo :: AvailInfo -> RdrAvailInfo
-- Used when building the avails we are going to put in an interface file
-- We sort the components to reduce needless wobbling of interfaces
rdrAvailInfo (Avail n) = Avail (nameOccName n)
rdrAvailInfo (AvailTC n ns) = AvailTC (nameOccName n) (sortLt (<) (map nameOccName ns))
+-------------------------------------
filterAvail :: RdrNameIE -- Wanted
-> AvailInfo -- Available
-> Maybe AvailInfo -- Resulting available;
filterAvail ie avail = Nothing
+-------------------------------------
+groupAvails :: Avails -> [(ModuleName, Avails)]
+ -- Group by module and sort by occurrence
+ -- This keeps the list in canonical order
+groupAvails avails
+ = [ (mkSysModuleNameFS fs, sortLt lt avails)
+ | (fs,avails) <- fmToList groupFM
+ ]
+ where
+ groupFM :: FiniteMap FastString Avails
+ -- Deliberatey use the FastString so we
+ -- get a canonical ordering
+ groupFM = foldl add emptyFM avails
+
+ add env avail = addToFM_C combine env mod_fs [avail]
+ where
+ mod_fs = moduleNameFS (moduleName (nameModule (availName avail)))
+ combine old _ = avail:old
+
+ a1 `lt` a2 = occ1 < occ2
+ where
+ occ1 = nameOccName (availName a1)
+ occ2 = nameOccName (availName a2)
+
+-------------------------------------
pprAvail :: AvailInfo -> SDoc
pprAvail (AvailTC n ns) = ppr n <> case filter (/= n) ns of
[] -> empty
%************************************************************************
\begin{code}
-type FreeVars = NameSet
-
-plusFV :: FreeVars -> FreeVars -> FreeVars
-addOneFV :: FreeVars -> Name -> FreeVars
-unitFV :: Name -> FreeVars
-emptyFVs :: FreeVars
-plusFVs :: [FreeVars] -> FreeVars
-mkFVs :: [Name] -> FreeVars
-
-isEmptyFVs = isEmptyNameSet
-emptyFVs = emptyNameSet
-plusFVs = unionManyNameSets
-plusFV = unionNameSets
-mkFVs = mkNameSet
-
--- No point in adding implicitly imported names to the free-var set
-addOneFV s n = addOneToNameSet s n
-unitFV n = unitNameSet n
-
-- A useful utility
mapFvRn f xs = mapRn f xs `thenRn` \ stuff ->
let
%************************************************************************
\begin{code}
-warnUnusedModules :: [Module] -> RnM d ()
+warnUnusedModules :: [ModuleName] -> RnM d ()
warnUnusedModules mods
= doptRn Opt_WarnUnusedImports `thenRn` \ warn ->
if warn then mapRn_ (addWarnRn . unused_mod) mods
unused_mod m = vcat [ptext SLIT("Module") <+> quotes (ppr m) <+>
text "is imported, but nothing from it is used",
parens (ptext SLIT("except perhaps to re-export instances visible in") <+>
- quotes (ppr (moduleName m)))]
+ quotes (ppr m))]
warnUnusedImports :: [(Name,Provenance)] -> RnM d ()
warnUnusedImports names