getLookupOccRn,
newLocalsRn, newIPNameRn,
- bindLocalNames, bindLocalNamesFV, bindLocalNamesFV_WithFixities,
+ bindLocalNames, bindLocalNamesFV,
+ MiniFixityEnv, emptyFsEnv, extendFsEnv, lookupFsEnv,
+ bindLocalNamesFV_WithFixities,
bindLocatedLocalsFV, bindLocatedLocalsRn,
bindSigTyVarsFV, bindPatSigTyVars, bindPatSigTyVarsFV,
bindTyVarsRn, extendTyVarEnvFVRn,
- bindLocalFixities,
checkDupRdrNames, checkDupNames, checkShadowedNames,
checkDupAndShadowedRdrNames,
import NameEnv
import LazyUniqFM
import DataCon ( dataConFieldLabels )
-import OccName ( OccName, tcName, isDataOcc, pprNonVarNameSpace, occNameSpace,
- reportIfUnused, occNameFS )
+import OccName
import Module ( Module, ModuleName )
import PrelNames ( mkUnboundName, rOOT_MAIN, iNTERACTIVE,
consDataConKey, hasKey, forall_tv_RDR )
%*********************************************************
\begin{code}
-lookupLocalDataTcNames :: RdrName -> RnM [Name]
--- GHC extension: look up both the tycon and data con
--- for con-like things
--- Complain if neither is in scope
-lookupLocalDataTcNames rdr_name
- | Just n <- isExact_maybe rdr_name
- -- Special case for (:), which doesn't get into the GlobalRdrEnv
- = return [n] -- For this we don't need to try the tycon too
- | otherwise
- = do { mb_gres <- mapM lookupGreLocalRn (dataTcOccs rdr_name)
- ; case [gre_name gre | Just gre <- mb_gres] of
- [] -> do {
- -- run for error reporting
- ; unboundName rdr_name
- ; return [] }
- names -> return names
- }
+--------------------------------
+type FastStringEnv a = UniqFM a -- Keyed by FastString
+
+
+emptyFsEnv :: FastStringEnv a
+lookupFsEnv :: FastStringEnv a -> FastString -> Maybe a
+extendFsEnv :: FastStringEnv a -> FastString -> a -> FastStringEnv a
+
+emptyFsEnv = emptyUFM
+lookupFsEnv = lookupUFM
+extendFsEnv = addToUFM
--------------------------------
-bindLocalFixities :: [FixitySig RdrName] -> (UniqFM (Located Fixity) -> RnM a) -> RnM a
--- Used for nested fixity decls:
--- bind the names that are in scope already;
--- pass the rest to the continuation for later
--- as a FastString->(Located Fixity) map
---
--- No need to worry about type constructors here,
--- Should check for duplicates?
-bindLocalFixities fixes thing_inside
- | null fixes = thing_inside emptyUFM
- | otherwise = do ls <- mappM rn_sig fixes
- let (now, later) = nowAndLater ls
- extendFixityEnv now $ thing_inside later
- where
- rn_sig (FixitySig lv@(L loc v) fix) = do
- vopt <- lookupBndrRn_maybe v
- case vopt of
- Just new_v -> returnM (Left (new_v, (FixItem (rdrNameOcc v) fix)))
- Nothing -> returnM (Right (occNameFS $ rdrNameOcc v, (L loc fix)))
-
- nowAndLater :: [Either (Name, FixItem) (FastString, Located Fixity)]
- -> ([(Name,FixItem)], UniqFM (Located Fixity))
- nowAndLater ls =
- foldr (\ cur -> \ (now, later) ->
- case cur of
- Left (n, f) -> ((n, f) : now, later)
- Right (fs, f) -> (now, addToUFM later fs f))
- ([], emptyUFM) ls
+type MiniFixityEnv = FastStringEnv (Located Fixity)
+ -- Mini fixity env for the names we're about
+ -- to bind, in a single binding group
+ --
+ -- It is keyed by the *FastString*, not the *OccName*, because
+ -- the single fixity decl infix 3 T
+ -- affects both the data constructor T and the type constrctor T
+ --
+ -- We keep the location so that if we find
+ -- a duplicate, we can report it sensibly
+--------------------------------
-- Used for nested fixity decls to bind names along with their fixities.
-- the fixities are given as a UFM from an OccName's FastString to a fixity decl
-- Also check for unused binders
bindLocalNamesFV_WithFixities :: [Name]
- -> UniqFM (Located Fixity)
+ -> MiniFixityEnv
-> RnM (a, FreeVars) -> RnM (a, FreeVars)
bindLocalNamesFV_WithFixities names fixities thing_inside
= bindLocalNamesFV names $
boundFixities = foldr
(\ name -> \ acc ->
-- check whether this name has a fixity decl
- case lookupUFM fixities (occNameFS (nameOccName name)) of
+ case lookupFsEnv fixities (occNameFS (nameOccName name)) of
Just (L _ fix) -> (name, FixItem (nameOccName name) fix) : acc
Nothing -> acc) [] names
-- bind the names; extend the fixity env; do the thing inside
lookupTyFixityRn (L loc n) = lookupFixityRn n
---------------
+lookupLocalDataTcNames :: RdrName -> RnM [Name]
+-- GHC extension: look up both the tycon and data con
+-- for con-like things
+-- Complain if neither is in scope
+lookupLocalDataTcNames rdr_name
+ | Just n <- isExact_maybe rdr_name
+ -- Special case for (:), which doesn't get into the GlobalRdrEnv
+ = return [n] -- For this we don't need to try the tycon too
+ | otherwise
+ = do { mb_gres <- mapM lookupGreLocalRn (dataTcOccs rdr_name)
+ ; case [gre_name gre | Just gre <- mb_gres] of
+ [] -> do {
+ -- run for error reporting
+ ; unboundName rdr_name
+ ; return [] }
+ names -> return names
+ }
+
dataTcOccs :: RdrName -> [RdrName]
-- If the input is a data constructor, return both it and a type
-- constructor. This is useful when we aren't sure which we are
; mappM_ check_shadow loc_rdr_names }
where
check_shadow (loc, occ)
- | Just n <- mb_local = complain [ptext SLIT("bound at") <+> ppr loc]
+ | Just n <- mb_local = complain [ptext SLIT("bound at") <+> ppr (nameSrcLoc n)]
| not (null gres) = complain (map pprNameProvenance gres)
| otherwise = return ()
where
warnUnusedImports gres = ifOptM Opt_WarnUnusedImports (warnUnusedGREs gres)
warnUnusedTopBinds gres = ifOptM Opt_WarnUnusedBinds (warnUnusedGREs gres)
-warnUnusedLocalBinds, warnUnusedMatches :: [Name] -> RnM (a, FreeVars) -> RnM (a, FreeVars)
+warnUnusedLocalBinds, warnUnusedMatches :: [Name] -> FreeVars -> RnM ()
warnUnusedLocalBinds = check_unused Opt_WarnUnusedBinds
warnUnusedMatches = check_unused Opt_WarnUnusedMatches
-check_unused :: DynFlag -> [Name] -> RnM (a, FreeVars) -> RnM (a, FreeVars)
-check_unused flag names thing_inside
- = do { (res, res_fvs) <- thing_inside
-
- -- Warn about unused names
- ; ifOptM flag (warnUnusedLocals (filterOut (`elemNameSet` res_fvs) names))
-
- -- And return
- ; return (res, res_fvs) }
+check_unused :: DynFlag -> [Name] -> FreeVars -> RnM ()
+check_unused flag bound_names used_names
+ = ifOptM flag (warnUnusedLocals (filterOut (`elemNameSet` used_names) bound_names))
-------------------------
-- Helpers
projects / ghc-hetmet.git / blobdiff