import HsSyn
import RdrHsSyn ( RdrNameIE )
import RdrName ( RdrName, rdrNameModule, rdrNameOcc, isQual, isUnqual,
- mkRdrUnqual, qualifyRdrName
+ mkRdrUnqual, qualifyRdrName, lookupRdrEnv
)
import HsTypes ( hsTyVarName, replaceTyVarName )
import HscTypes ( Provenance(..), pprNameProvenance, hasBetterProv,
import Name ( Name, NamedThing(..),
getSrcLoc,
mkLocalName, mkImportedLocalName, mkGlobalName,
- mkIPName, nameOccName, nameModule,
+ mkIPName, nameOccName, nameModule_maybe,
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 List ( nub )
import PrelNames ( mkUnboundName )
import CmdLineOpts
+import FastString ( FastString )
\end{code}
%*********************************************************
\begin{code}
newTopBinder :: Module -> RdrName -> SrcLoc -> RnM d Name
+ -- newTopBinder puts into the cache the binder with the
+ -- module information set correctly. When the decl is later renamed,
+ -- the binding site will thereby get the correct module.
+ -- There maybe occurrences that don't have the correct Module, but
+ -- by the typechecker will propagate the binding definition to all
+ -- the occurrences, so that doesn't matter
+
newTopBinder mod rdr_name loc
= -- First check the cache
traceRn (text "newTopBinder" <+> ppr mod <+> ppr loc) `thenRn_`
+ -- There should never be a qualified name in a binding position (except in instance decls)
+ -- The parser doesn't check this because the same parser parses instance decls
+ (if isQual rdr_name then
+ qualNameErr (text "its declaration") (rdr_name,loc)
+ else
+ returnRn ()
+ ) `thenRn_`
+
getNameSupplyRn `thenRn` \ (us, cache, ipcache) ->
let
occ = rdrNameOcc rdr_name
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)
filterAvail ie avail = Nothing
-------------------------------------
-sortAvails :: Avails -> Avails
-sortAvails avails = sortLt lt avails
+groupAvails :: Module -> Avails -> [(ModuleName, Avails)]
+ -- Group by module and sort by occurrence
+ -- This keeps the list in canonical order
+groupAvails this_mod avails
+ = [ (mkSysModuleNameFS fs, sortLt lt avails)
+ | (fs,avails) <- fmToList groupFM
+ ]
where
- a1 `lt` a2 = mod1 < mod2 ||
- (mod1 == mod2 && occ1 < occ2)
+ groupFM :: FiniteMap FastString Avails
+ -- Deliberately 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 avail_mod)
+ avail_mod = case nameModule_maybe (availName avail) of
+ Just m -> m
+ Nothing -> this_mod
+ combine old _ = avail:old
+
+ a1 `lt` a2 = occ1 < occ2
where
- name1 = availName a1
- name2 = availName a2
- mod1 = nameModule name1
- mod2 = nameModule name2
- occ1 = nameOccName name1
- occ2 = nameOccName name2
+ occ1 = nameOccName (availName a1)
+ occ2 = nameOccName (availName a2)
-------------------------------------
pprAvail :: AvailInfo -> SDoc
%************************************************************************
\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
projects / ghc-hetmet.git / blobdiff