import RnMonad
import Name ( Name, Provenance(..), ExportFlag(..), NamedThing(..),
ImportReason(..), getSrcLoc,
- mkLocalName, mkImportedLocalName, mkGlobalName, isSystemName,
+ mkLocalName, mkImportedLocalName, mkGlobalName, mkUnboundName,
+ mkIPName, isSystemName, isWiredInName,
nameOccName, setNameModule, nameModule,
pprOccName, isLocallyDefined, nameUnique, nameOccName,
occNameUserString,
)
import TysWiredIn ( tupleTyCon, unboxedTupleTyCon, listTyCon )
import Type ( funTyCon )
-import Module ( ModuleName, mkThisModule, mkVanillaModule, moduleName )
+import Module ( ModuleName, mkThisModule, moduleName, mkVanillaModule )
import TyCon ( TyCon )
import FiniteMap
import Unique ( Unique, Uniquable(..) )
%*********************************************************
\begin{code}
-newImportedGlobalName mod_name occ mod
- = getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
+newLocalTopBinder :: Module -> OccName
+ -> (Name -> ExportFlag) -> SrcLoc
+ -> RnM d Name
+newLocalTopBinder mod occ rec_exp_fn loc
+ = newTopBinder mod occ (\name -> setNameProvenance name (LocalDef loc (rec_exp_fn name)))
+ -- We must set the provenance of the thing in the cache
+ -- correctly, particularly whether or not it is locally defined.
+ --
+ -- Since newLocalTopBinder is used only
+ -- at binding occurrences, we may as well get the provenance
+ -- dead right first time; hence the rec_exp_fn passed in
+
+newImportedBinder :: Module -> RdrName -> RnM d Name
+newImportedBinder mod rdr_name
+ = ASSERT2( isUnqual rdr_name, ppr rdr_name )
+ newTopBinder mod (rdrNameOcc rdr_name) (\name -> name)
+ -- Provenance is already implicitImportProvenance
+
+implicitImportProvenance = NonLocalDef ImplicitImport False
+
+newTopBinder :: Module -> OccName -> (Name -> Name) -> RnM d Name
+newTopBinder mod occ set_prov
+ = -- First check the cache
+ getNameSupplyRn `thenRn` \ (us, inst_ns, cache, ipcache) ->
+ let
+ key = (moduleName mod, occ)
+ in
+ case lookupFM cache key of
+
+ -- A hit in the cache!
+ -- Set the Module of the thing, and set its provenance (hack pending
+ -- spj update)
+ --
+ -- It also means that if there are two defns for the same thing
+ -- in a module, then each gets a separate SrcLoc
+ --
+ -- There's a complication for wired-in names. We don't want to
+ -- forget that they are wired in even when compiling that module
+ -- (else we spit out redundant defns into the interface file)
+ -- So for them we just set the provenance
+
+ Just name -> let
+ new_name = set_prov (setNameModule name mod)
+ new_cache = addToFM cache key new_name
+ in
+ setNameSupplyRn (us, inst_ns, new_cache, ipcache) `thenRn_`
+ returnRn new_name
+
+ -- Miss in the cache!
+ -- Build a completely new Name, and put it in the cache
+ Nothing -> let
+ (us', us1) = splitUniqSupply us
+ uniq = uniqFromSupply us1
+ new_name = set_prov (mkGlobalName uniq mod occ implicitImportProvenance)
+ new_cache = addToFM cache key new_name
+ in
+ setNameSupplyRn (us', inst_ns, new_cache, ipcache) `thenRn_`
+ returnRn new_name
+
+
+mkImportedGlobalName :: ModuleName -> OccName -> RnM d Name
+ -- Used for *occurrences*. We make a place-holder Name, really just
+ -- to agree on its unique, which gets overwritten when we read in
+ -- the binding occurence later (newImportedBinder)
+ -- The place-holder Name doesn't have the right Provenance, and its
+ -- Module won't have the right Package either
+ --
+ -- This means that a renamed program may have incorrect info
+ -- on implicitly-imported occurrences, but the correct info on the
+ -- *binding* declaration. It's the type checker that propagates the
+ -- correct information to all the occurrences.
+ -- Since implicitly-imported names never occur in error messages,
+ -- it doesn't matter that we get the correct info in place till later,
+ -- (but since it affects DLL-ery it does matter that we get it right
+ -- in the end).
+mkImportedGlobalName mod_name occ
+ = getNameSupplyRn `thenRn` \ (us, inst_ns, cache, ipcache) ->
let
key = (mod_name, occ)
in
case lookupFM cache key of
Just name -> returnRn name
- Nothing -> setNameSupplyRn (us', inst_ns, new_cache) `thenRn_`
+ Nothing -> setNameSupplyRn (us', inst_ns, new_cache, ipcache) `thenRn_`
returnRn name
where
(us', us1) = splitUniqSupply us
uniq = uniqFromSupply us1
- name = mkGlobalName uniq mod occ (NonLocalDef ImplicitImport False)
+ mod = mkVanillaModule mod_name
+ name = mkGlobalName uniq mod occ implicitImportProvenance
new_cache = addToFM cache key name
updateProvenances :: [Name] -> RnM d ()
+-- Update the provenances of everything that is in scope.
+-- We must be careful not to disturb the Module package info
+-- already in the cache. Why not? Consider
+-- module A module M( f )
+-- import M( f ) import N( f)
+-- import N
+-- So f is defined in N, and M re-exports it.
+-- When processing module A:
+-- 1. We read M.hi first, and make a vanilla name N.f
+-- (without reading N.hi). The package info says <THIS>
+-- for lack of anything better.
+-- 2. Now we read N, which update the cache to record
+-- the correct package for N.f.
+-- 3. Finally we update provenances (once we've read all imports).
+-- Step 3 must not destroy package info recorded in Step 2.
+
updateProvenances names
- = getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
- setNameSupplyRn (us, inst_ns, update cache names)
+ = getNameSupplyRn `thenRn` \ (us, inst_ns, cache, ipcache) ->
+ setNameSupplyRn (us, inst_ns, foldr update cache names, ipcache)
where
- update cache [] = cache
- update cache (name:names) = WARN( not (key `elemFM` cache), ppr name )
- update (addToFM cache key name) names
- where
- key = (moduleName (nameModule name), nameOccName name)
+ update name cache = addToFM_C update_prov cache key name
+ where
+ key = (moduleName (nameModule name), nameOccName name)
-newImportedBinder :: Module -> RdrName -> RnM d Name
-newImportedBinder mod rdr_name
- = ASSERT2( isUnqual rdr_name, ppr rdr_name )
- newImportedGlobalName (moduleName mod) (rdrNameOcc rdr_name) mod
+ update_prov name_in_cache name_with_prov
+ = setNameProvenance name_in_cache (getNameProvenance name_with_prov)
+
--- Make an imported global name, checking first to see if it's in the cache
-mkImportedGlobalName :: ModuleName -> OccName -> RnM d Name
-mkImportedGlobalName mod_name occ
- = lookupModuleRn mod_name `thenRn` \ mod ->
- newImportedGlobalName mod_name occ mod --(mkVanillaModule mod_name)
-
+
+mkImportedGlobalFromRdrName :: RdrName -> RnM d Name
mkImportedGlobalFromRdrName rdr_name
| isQual rdr_name
= mkImportedGlobalName (rdrNameModule rdr_name) (rdrNameOcc rdr_name)
mkImportedGlobalName mod_name (rdrNameOcc rdr_name)
-newLocalTopBinder :: Module -> OccName
- -> (Name -> ExportFlag) -> SrcLoc
- -> RnM d Name
-newLocalTopBinder mod occ rec_exp_fn loc
- = -- First check the cache
- getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
- let
- key = (moduleName mod,occ)
- mk_prov name = LocalDef loc (rec_exp_fn name)
- -- We must set the provenance of the thing in the cache
- -- correctly, particularly whether or not it is locally defined.
- --
- -- Since newLocallyDefinedGlobalName is used only
- -- at binding occurrences, we may as well get the provenance
- -- dead right first time; hence the rec_exp_fn passed in
- in
- case lookupFM cache key of
-
- -- A hit in the cache!
- -- Overwrite whatever provenance is in the cache already;
- -- this updates WiredIn things and known-key things,
- -- which are there from the start, to LocalDef.
- --
- -- It also means that if there are two defns for the same thing
- -- in a module, then each gets a separate SrcLoc
- Just name -> let
- new_name = setNameProvenance name (mk_prov new_name)
- new_cache = addToFM cache key new_name
- in
- setNameSupplyRn (us, inst_ns, new_cache) `thenRn_`
- returnRn new_name
-
- -- Miss in the cache!
- -- Build a new original name, and put it in the cache
- Nothing -> let
- (us', us1) = splitUniqSupply us
- uniq = uniqFromSupply us1
- new_name = mkGlobalName uniq mod occ (mk_prov new_name)
- new_cache = addToFM cache key new_name
- in
- setNameSupplyRn (us', inst_ns, new_cache) `thenRn_`
- returnRn new_name
+getIPName rdr_name
+ = getNameSupplyRn `thenRn` \ (us, inst_ns, cache, ipcache) ->
+ case lookupFM ipcache key of
+ Just name -> returnRn name
+ Nothing -> setNameSupplyRn (us', inst_ns, cache, new_ipcache) `thenRn_`
+ returnRn name
+ where
+ (us', us1) = splitUniqSupply us
+ uniq = uniqFromSupply us1
+ name = mkIPName uniq key
+ new_ipcache = addToFM ipcache key name
+ where key = (rdrNameOcc rdr_name)
\end{code}
%*********************************************************
returnRn ()
) `thenRn_`
- getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
+ getNameSupplyRn `thenRn` \ (us, inst_ns, cache, ipcache) ->
getModeRn `thenRn` \ mode ->
let
n = length rdr_names_w_loc
-- Keep track of whether the name originally came from
-- an interface file.
in
- setNameSupplyRn (us', inst_ns, cache) `thenRn_`
+ setNameSupplyRn (us', inst_ns, cache, ipcache) `thenRn_`
let
new_name_env = addListToRdrEnv name_env (map fst rdr_names_w_loc `zip` names)
bindCoreLocalFVRn rdr_name enclosed_scope
= getSrcLocRn `thenRn` \ loc ->
getLocalNameEnv `thenRn` \ name_env ->
- getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
+ getNameSupplyRn `thenRn` \ (us, inst_ns, cache, ipcache) ->
let
(us', us1) = splitUniqSupply us
uniq = uniqFromSupply us1
name = mkImportedLocalName uniq (rdrNameOcc rdr_name) loc
in
- setNameSupplyRn (us', inst_ns, cache) `thenRn_`
+ setNameSupplyRn (us', inst_ns, cache, ipcache) `thenRn_`
let
new_name_env = extendRdrEnv name_env rdr_name name
in
plusExportAvails :: ExportAvails -> ExportAvails -> ExportAvails
plusExportAvails (m1, e1) (m2, e2)
- = (plusFM_C (++) m1 m2, plusUFM_C plusAvail e1 e2)
+ = (plusFM_C (++) m1 m2, plusAvailEnv e1 e2)
-- ToDo: wasteful: we do this once for each constructor!
\end{code}
\begin{code}
plusAvail (Avail n1) (Avail n2) = Avail n1
-plusAvail (AvailTC n1 ns1) (AvailTC n2 ns2) = AvailTC n1 (nub (ns1 ++ ns2))
+plusAvail (AvailTC n1 ns1) (AvailTC n2 ns2) = AvailTC n2 (nub (ns1 ++ ns2))
-- Added SOF 4/97
#ifdef DEBUG
plusAvail a1 a2 = pprPanic "RnEnv.plusAvail" (hsep [pprAvail a1,pprAvail a2])
#endif
+addAvail :: AvailEnv -> AvailInfo -> AvailEnv
+addAvail avails avail = addToNameEnv_C plusAvail avails (availName avail) avail
+
+emptyAvailEnv = emptyNameEnv
+unitAvailEnv :: AvailInfo -> AvailEnv
+unitAvailEnv a = unitNameEnv (availName a) a
+
+plusAvailEnv :: AvailEnv -> AvailEnv -> AvailEnv
+plusAvailEnv = plusNameEnv_C plusAvail
+
+availEnvElts = nameEnvElts
+
addAvailToNameSet :: NameSet -> AvailInfo -> NameSet
addAvailToNameSet names avail = addListToNameSet names (availNames avail)
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)
+
filterAvail :: RdrNameIE -- Wanted
-> AvailInfo -- Available
-> Maybe AvailInfo -- Resulting available;
-- import A( op )
-- where op is a class operation
-filterAvail (IEThingAll _) avail@(AvailTC _ _) = Just avail
+filterAvail (IEThingAll _) avail@(AvailTC _ _) = Just avail
+ -- We don't complain even if the IE says T(..), but
+ -- no constrs/class ops of T are available
+ -- Instead that's caught with a warning by the caller
filterAvail ie avail = Nothing
+pprAvail :: AvailInfo -> SDoc
+pprAvail (AvailTC n ns) = ppr n <> case filter (/= n) ns of
+ [] -> empty
+ ns' -> parens (hsep (punctuate comma (map ppr ns')))
--- In interfaces, pprAvail gets given the OccName of the "host" thing
-pprAvail avail = getPprStyle $ \ sty ->
- if ifaceStyle sty then
- ppr_avail (pprOccName . nameOccName) avail
- else
- ppr_avail ppr avail
-
-ppr_avail pp_name (AvailTC n ns) = hsep [
- pp_name n,
- parens $ hsep $ punctuate comma $
- map pp_name ns
- ]
-ppr_avail pp_name (Avail n) = pp_name n
+pprAvail (Avail n) = ppr n
\end{code}
%************************************************************************
+
\begin{code}
-warnUnusedLocalBinds, warnUnusedTopNames, warnUnusedMatches :: [Name] -> RnM d ()
+warnUnusedLocalBinds, warnUnusedImports, warnUnusedMatches :: [Name] -> RnM d ()
-warnUnusedTopNames names
- | not opt_WarnUnusedBinds && not opt_WarnUnusedImports
- = returnRn () -- Don't force ns unless necessary
+warnUnusedImports names
+ | not opt_WarnUnusedImports
+ = returnRn () -- Don't force names unless necessary
| otherwise
- = warnUnusedBinds (\ is_local -> not is_local) names
+ = warnUnusedBinds (const True) names
warnUnusedLocalBinds ns
| not opt_WarnUnusedBinds = returnRn ()
- | otherwise = warnUnusedBinds (\ is_local -> is_local) ns
+ | otherwise = warnUnusedBinds (const True) ns
warnUnusedMatches names
| opt_WarnUnusedMatches = warnUnusedGroup (const True) names
-------------------------
+-- NOTE: the function passed to warnUnusedGroup is
+-- now always (const True) so we should be able to
+-- simplify the code slightly. I'm leaving it there
+-- for now just in case I havn't realised why it was there.
+-- Looks highly bogus to me. SLPJ Dec 99
+
warnUnusedGroup :: (Bool -> Bool) -> [Name] -> RnM d ()
warnUnusedGroup emit_warning names
| null filtered_names = returnRn ()
projects / ghc-hetmet.git / blobdiff