import CmdLineOpts
\end{code}
-
-
%*********************************************************
%* *
\subsection{Making new names}
%*********************************************************
\begin{code}
-implicitImportProvenance = NonLocalDef ImplicitImport False
-
newTopBinder :: Module -> RdrName -> SrcLoc -> RnM d Name
newTopBinder mod rdr_name loc
= -- First check the cache
getModuleRn `thenRn` \ mod ->
getGlobalNameEnv `thenRn` \ global_env ->
case lookupRdrEnv global_env (qualifyRdrName (moduleName mod) rdr_name) of
- Just (name:rest) -> ASSERT( null rest )
- returnRn name
+ Just ((name,_):rest) -> ASSERT( null rest )
+ returnRn name
Nothing -> -- Almost always this case is a compiler bug.
-- But consider a type signature that doesn't have
-- a corresponding binder:
getGlobalNameEnv `thenRn` \ global_env ->
case lookupRdrEnv global_env rdr_name of
Just [(name,_)] -> returnRn name
- Just stuff@(_:_) -> addNameClashErrRn rdr_name stuff `thenRn_`
- returnRn rdr_name
+ Just stuff@((name,_):_)
+ -> addNameClashErrRn rdr_name stuff `thenRn_`
+ returnRn name
Nothing -> -- Not found when processing source code; so fail
failWithRn (mkUnboundName rdr_name)
(unknownNameErr rdr_name)
(n,pn) `beats` (m,pm) = n==m && pn `hasBetterProv` pm
- is_duplicate :: Provenance -> (Name,Provenance) -> Bool
- is_duplicate (n1,LocalDef _) (n2,LocalDef _) = False
- is_duplicate n1 n2 = n1 == n2
+ is_duplicate :: (Name,Provenance) -> (Name,Provenance) -> Bool
+ is_duplicate (n1,LocalDef) (n2,LocalDef) = False
+ is_duplicate (n1,_) (n2,_) = n1 == n2
\end{code}
We treat two bindings of a locally-defined name as a duplicate,
warnUnusedModules :: [Module] -> RnM d ()
warnUnusedModules mods
= doptRn Opt_WarnUnusedImports `thenRn` \ warn ->
- if warn then mapRn_ (addWarnRn . unused_mod . moduleName) mods
+ if warn then mapRn_ (addWarnRn . unused_mod) mods
else returnRn ()
where
unused_mod m = vcat [ptext SLIT("Module") <+> quotes (ppr m) <+>
warnUnusedImports :: [(Name,Provenance)] -> RnM d ()
warnUnusedImports names
= doptRn Opt_WarnUnusedImports `thenRn` \ warn ->
- if warn then warnUnusedBinds names else return ()
+ if warn then warnUnusedBinds names else returnRn ()
warnUnusedLocalBinds, warnUnusedMatches :: [Name] -> RnM d ()
warnUnusedLocalBinds names
where
-- Group by provenance
groups = equivClasses cmp names
- (_,prov1) `cmp` (_,prov2) = prov1 `cmp_prov` prov2
+ (_,prov1) `cmp` (_,prov2) = prov1 `compare` prov2
- cmp_prov (LocalDef _ _) (NonLocalDef _ _) = LT
- cmp_prov (LocalDef loc1 _) (LocalDef loc2 _) = loc1 `compare` loc2
- cmp_prov (NonLocalDef (UserImport m1 loc1 _) _)
- (NonLocalDef (UserImport m2 loc2 _) _) =
- (m1 `compare` m2) `thenCmp` (loc1 `compare` loc2)
- cmp_prov (NonLocalDef _ _) (LocalDef _ _) = GT
- -- In-scope NonLocalDefs must have UserImport info on them
-------------------------
| otherwise
= pushSrcLocRn def_loc $
addWarnRn $
- sep [msg <> colon, nest 4 (fsep (punctuate comma (map ppr filtered_names)))]
+ sep [msg <> colon, nest 4 (fsep (punctuate comma (map (ppr.fst) filtered_names)))]
where
filtered_names = filter reportable names
(name1, prov1) = head filtered_names
(is_local, def_loc, msg)
= case prov1 of
- LocalDef loc _ -> (True, loc, text "Defined but not used")
+ LocalDef -> (True, getSrcLoc name1, text "Defined but not used")
NonLocalDef (UserImport mod loc _) _
-> (True, loc, text "Imported from" <+> quotes (ppr mod) <+> text "but not used")