)
import CmdLineOpts ( opt_HiMap, opt_D_dump_rn_trace,
- opt_D_dump_rn, opt_D_dump_rn_stats,
- opt_WarnUnusedBinds, opt_WarnUnusedImports
+ opt_D_dump_rn, opt_D_dump_rn_stats, opt_WarnDeprecations
)
import RnMonad
import RnNames ( getGlobalNames )
import RnIfaces ( getImportedInstDecls, importDecl, getImportVersions,
getImportedRules, loadHomeInterface, getSlurped, removeContext
)
-import RnEnv ( availName, availNames, availsToNameSet,
- warnUnusedTopNames, mapFvRn, lookupImplicitOccRn,
+import RnEnv ( availName, availsToNameSet,
+ warnUnusedImports, warnUnusedLocalBinds, lookupImplicitOccRn,
FreeVars, plusFVs, plusFV, unitFV, emptyFVs, isEmptyFVs
)
-import Module ( Module, ModuleName, pprModule, mkSearchPath, mkThisModule )
-import Name ( Name, isLocallyDefined,
- NamedThing(..), ImportReason(..), Provenance(..),
- pprOccName, nameOccName,
- getNameProvenance,
+import Module ( Module, ModuleName, mkSearchPath, mkThisModule )
+import Name ( Name, isLocallyDefined, NamedThing(..), getSrcLoc,
+ nameOccName, nameUnique,
+ isUserImportedExplicitlyName, isUserImportedName,
maybeWiredInTyConName, maybeWiredInIdName, isWiredInName
)
+import OccName ( occNameFlavour, isValOcc )
import Id ( idType )
-import DataCon ( dataConTyCon, dataConType )
-import TyCon ( TyCon, tyConDataCons, isSynTyCon, getSynTyConDefn )
-import RdrName ( RdrName )
+import TyCon ( isSynTyCon, getSynTyConDefn )
import NameSet
import PrelMods ( mAIN_Name, pREL_MAIN_Name )
import TysWiredIn ( unitTyCon, intTyCon, doubleTyCon, boolTyCon )
-import PrelInfo ( ioTyCon_NAME, numClass_RDR, thinAirIdNames, derivingOccurrences )
+import PrelInfo ( ioTyCon_NAME, thinAirIdNames, fractionalClassKeys, derivingOccurrences )
import Type ( namesOfType, funTyCon )
import ErrUtils ( printErrorsAndWarnings, dumpIfSet, ghcExit )
import BasicTypes ( NewOrData(..) )
import Bag ( isEmptyBag, bagToList )
-import FiniteMap ( fmToList, delListFromFM, addToFM, sizeFM, eltsFM )
+import FiniteMap ( eltsFM )
import UniqSupply ( UniqSupply )
import UniqFM ( lookupUFM )
-import Util ( equivClasses )
import Maybes ( maybeToBool )
import Outputable
\end{code}
, [ModuleName] -- Imported modules; for profiling
))
-renameModule us this_mod@(HsModule mod_name vers exports imports local_decls loc)
+renameModule us this_mod@(HsModule mod_name vers exports imports local_decls _ loc)
= -- Initialise the renamer monad
initRn mod_name us (mkSearchPath opt_HiMap) loc
(rename this_mod) >>=
- \ (maybe_rn_stuff, rn_errs_bag, rn_warns_bag) ->
+ \ ((maybe_rn_stuff, dump_action), rn_errs_bag, rn_warns_bag) ->
-- Check for warnings
printErrorsAndWarnings rn_errs_bag rn_warns_bag >>
- -- Dump output, if any
- (case maybe_rn_stuff of
- Nothing -> return ()
- Just results@(_, rn_mod, _, _, _)
- -> dumpIfSet opt_D_dump_rn "Renamer:"
- (ppr rn_mod)
- ) >>
+ -- Dump any debugging output
+ dump_action >>
-- Return results
if not (isEmptyBag rn_errs_bag) then
\begin{code}
-rename this_mod@(HsModule mod_name vers exports imports local_decls loc)
+rename :: RdrNameHsModule
+ -> RnMG (Maybe (Module, RenamedHsModule, InterfaceDetails, RnNameSupply, [ModuleName]), IO ())
+rename this_mod@(HsModule mod_name vers _ imports local_decls mod_deprec loc)
= -- FIND THE GLOBAL NAME ENVIRONMENT
getGlobalNames this_mod `thenRn` \ maybe_stuff ->
-- CHECK FOR EARLY EXIT
if not (maybeToBool maybe_stuff) then
-- Everything is up to date; no need to recompile further
- rnStats [] `thenRn_`
- returnRn Nothing
+ rnDump [] [] `thenRn` \ dump_action ->
+ returnRn (Nothing, dump_action)
else
let
Just (export_env, gbl_env, fixity_env, global_avail_env) = maybe_stuff
+ ExportEnv export_avails _ _ = export_env
in
-- RENAME THE SOURCE
-- SLURP IN ALL THE NEEDED DECLARATIONS
implicitFVs mod_name rn_local_decls `thenRn` \ implicit_fvs ->
let
- real_source_fvs = implicit_fvs `plusFV` source_fvs
+ real_source_fvs = implicit_fvs `plusFV` source_fvs `plusFV` export_fvs
-- It's important to do the "plus" this way round, so that
-- when compiling the prelude, locally-defined (), Bool, etc
-- override the implicit ones.
+
+ -- The export_fvs make the exported names look just as if they
+ -- occurred in the source program. For the reasoning, see the
+ -- comments with RnIfaces.getImportVersions
+ export_fvs = mkNameSet (map availName export_avails)
in
slurpImpDecls real_source_fvs `thenRn` \ rn_imp_decls ->
+ let
+ rn_all_decls = rn_local_decls ++ rn_imp_decls
+
+ -- COLLECT ALL DEPRECATIONS
+ deprec_sigs = [ ds | ValD bnds <- rn_local_decls, ds <- collectDeprecs bnds ]
+ deprecs = case mod_deprec of
+ Nothing -> deprec_sigs
+ Just txt -> Deprecation (IEModuleContents undefined) txt : deprec_sigs
+ in
-- EXIT IF ERRORS FOUND
- checkErrsRn `thenRn` \ no_errs_so_far ->
+ checkErrsRn `thenRn` \ no_errs_so_far ->
if not no_errs_so_far then
-- Found errors already, so exit now
- rnStats [] `thenRn_`
- returnRn Nothing
+ rnDump rn_imp_decls rn_all_decls `thenRn` \ dump_action ->
+ returnRn (Nothing, dump_action)
else
-- GENERATE THE VERSION/USAGE INFO
- getImportVersions mod_name exports `thenRn` \ my_usages ->
- getNameSupplyRn `thenRn` \ name_supply ->
+ getImportVersions mod_name export_env `thenRn` \ my_usages ->
+ getNameSupplyRn `thenRn` \ name_supply ->
-- REPORT UNUSED NAMES
reportUnusedNames gbl_env global_avail_env
let
has_orphans = any isOrphanDecl rn_local_decls
direct_import_mods = [mod | ImportDecl mod _ _ _ _ _ <- imports]
- rn_all_decls = rn_imp_decls ++ rn_local_decls
renamed_module = HsModule mod_name vers
trashed_exports trashed_imports
rn_all_decls
+ mod_deprec
loc
in
- rnStats rn_imp_decls `thenRn_`
+ rnDump rn_imp_decls rn_all_decls `thenRn` \ dump_action ->
returnRn (Just (mkThisModule mod_name,
renamed_module,
- (has_orphans, my_usages, export_env),
+ (InterfaceDetails has_orphans my_usages export_env deprecs),
name_supply,
- direct_import_mods))
+ direct_import_mods), dump_action)
where
trashed_exports = {-trace "rnSource:trashed_exports"-} Nothing
trashed_imports = {-trace "rnSource:trashed_imports"-} []
+
+ collectDeprecs EmptyBinds = []
+ collectDeprecs (ThenBinds x y) = collectDeprecs x ++ collectDeprecs y
+ collectDeprecs (MonoBind _ sigs _) = [ d | DeprecSig d _ <- sigs ]
\end{code}
@implicitFVs@ forces the renamer to slurp in some things which aren't
\begin{code}
implicitFVs mod_name decls
= mapRn lookupImplicitOccRn implicit_occs `thenRn` \ implicit_names ->
- returnRn (implicit_main `plusFV`
- mkNameSet default_tys `plusFV`
- mkNameSet thinAirIdNames `plusFV`
+ returnRn (implicit_main `plusFV`
+ mkNameSet (map getName default_tycons) `plusFV`
+ mkNameSet thinAirIdNames `plusFV`
mkNameSet implicit_names)
-
where
- -- Add occurrences for Int, Double, and (), because they
+ -- Add occurrences for Int, and (), because they
-- are the types to which ambigious type variables may be defaulted by
-- the type checker; so they won't always appear explicitly.
-- [The () one is a GHC extension for defaulting CCall results.]
-- ALSO: funTyCon, since it occurs implicitly everywhere!
-- (we don't want to be bothered with making funTyCon a
-- free var at every function application!)
- default_tys = [getName intTyCon, getName doubleTyCon,
- getName unitTyCon, getName funTyCon, getName boolTyCon]
+ -- Double is dealt with separately in getGates
+ default_tycons = [unitTyCon, funTyCon, boolTyCon, intTyCon]
-- Add occurrences for IO or PrimIO
implicit_main | mod_name == mAIN_Name
-- generate code
implicit_occs = foldr ((++) . get) [] decls
- get (DefD _) = [numClass_RDR]
get (TyClD (TyData _ _ _ _ _ (Just deriv_classes) _ _))
= concat (map get_deriv deriv_classes)
get other = []
isOrphanDecl (RuleD (RuleDecl _ _ _ lhs _ _))
= check lhs
where
- check (HsVar v) = not (isLocallyDefined v)
- check (HsApp f a) = check f && check a
- check other = True
+ -- At the moment we just check for common LHS forms
+ -- Expand as necessary. Getting it wrong just means
+ -- more orphans than necessary
+ check (HsVar v) = not (isLocallyDefined v)
+ check (HsApp f a) = check f && check a
+ check (HsLit _) = False
+ check (OpApp l o _ r) = check l && check o && check r
+ check (NegApp e _) = check e
+ check (HsPar e) = check e
+ check (SectionL e o) = check e && check o
+ check (SectionR o e) = check e && check o
+
+ check other = True -- Safe fall through
+
isOrphanDecl other = False
\end{code}
+\begin{code}
+dupDefaultDeclErrRn (DefaultDecl _ locn1 : dup_things)
+ = pushSrcLocRn locn1 $
+ addErrRn msg
+ where
+ msg = hang (ptext SLIT("Multiple default declarations"))
+ 4 (vcat (map pp dup_things))
+ pp (DefaultDecl _ locn) = ptext SLIT("here was another default declaration") <+> ppr locn
+\end{code}
+
+
%*********************************************************
%* *
\subsection{Slurping declarations}
rnInstDecls decls1 fvs1 gates1 inst_decls `thenRn` \ (decls2, fvs2, gates2) ->
go_outer decls2 fvs2 (all_gates `plusFV` gates2)
(nameSetToList (gates2 `minusNameSet` all_gates))
- -- Knock out the all_gates because even ifwe don't slurp any new
+ -- Knock out the all_gates because even if we don't slurp any new
-- decls we can get some apparently-new gates from wired-in names
go_inner decls fvs gates []
getGates source_fvs (SigD (IfaceSig _ ty _ _))
= extractHsTyNames ty
-getGates source_fvs (TyClD (ClassDecl ctxt cls tvs _ sigs _ _ _ _ _ _))
- = delListFromNameSet (foldr (plusFV . get) (extractHsCtxtTyNames ctxt) sigs)
+getGates source_fvs (TyClD (ClassDecl ctxt cls tvs _ sigs _ _ _ _ _ _ _))
+ = (delListFromNameSet (foldr (plusFV . get) (extractHsCtxtTyNames ctxt) sigs)
(map getTyVarName tvs)
- `addOneToNameSet` cls
+ `addOneToNameSet` cls)
+ `plusFV` maybe_double
where
get (ClassOpSig n _ _ ty _)
| n `elemNameSet` source_fvs = extractHsTyNames ty
| otherwise = emptyFVs
+ -- If we load any numeric class that doesn't have
+ -- Int as an instance, add Double to the gates.
+ -- This takes account of the fact that Double might be needed for
+ -- defaulting, but we don't want to load Double (and all its baggage)
+ -- if the more exotic classes aren't used at all.
+ maybe_double | nameUnique cls `elem` fractionalClassKeys
+ = unitFV (getName doubleTyCon)
+ | otherwise
+ = emptyFVs
+
getGates source_fvs (TyClD (TySynonym tycon tvs ty _))
= delListFromNameSet (extractHsTyNames ty)
(map getTyVarName tvs)
(map getTyVarName tvs)
`addOneToNameSet` tycon
where
- get (ConDecl n tvs ctxt details _)
+ get (ConDecl n _ tvs ctxt details _)
| n `elemNameSet` source_fvs
-- If the constructor is method, get fvs from all its fields
= delListFromNameSet (get_details details `plusFV`
extractHsCtxtTyNames ctxt)
(map getTyVarName tvs)
- get (ConDecl n tvs ctxt (RecCon fields) _)
+ get (ConDecl n _ tvs ctxt (RecCon fields) _)
-- Even if the constructor isn't mentioned, the fields
-- might be, as selectors. They can't mention existentially
-- bound tyvars (typechecker checks for that) so no need for
%*********************************************************
\begin{code}
-reportUnusedNames gbl_env avail_env (ExportEnv export_avails _) mentioned_names
+reportUnusedNames :: GlobalRdrEnv -> NameEnv AvailInfo -> ExportEnv -> NameSet -> RnM d ()
+reportUnusedNames gbl_env avail_env (ExportEnv export_avails _ _) mentioned_names
= let
used_names = mentioned_names `unionNameSets` availsToNameSet export_avails
-- Now, a use of C implies a use of T,
-- if C was brought into scope by T(..) or T(C)
really_used_names = used_names `unionNameSets`
- mkNameSet [ availName avail
- | sub_name <- nameSetToList used_names,
- let avail = case lookupNameEnv avail_env sub_name of
- Just avail -> avail
- Nothing -> WARN( True, text "reportUnusedName: not in avail_env" <+> ppr sub_name )
- Avail sub_name
+ mkNameSet [ availName parent_avail
+ | sub_name <- nameSetToList used_names
+ , isValOcc (getOccName sub_name)
+
+ -- Usually, every used name will appear in avail_env, but there
+ -- is one time when it doesn't: tuples and other built in syntax. When you
+ -- write (a,b) that gives rise to a *use* of "(,)", so that the
+ -- instances will get pulled in, but the tycon "(,)" isn't actually
+ -- in scope. Hence the isValOcc filter.
+ --
+ -- Also, (-x) gives rise to an implicit use of 'negate'; similarly,
+ -- 3.5 gives rise to an implcit use of :%
+ -- hence the isUserImportedName filter on the warning
+
+ , let parent_avail
+ = case lookupNameEnv avail_env sub_name of
+ Just avail -> avail
+ Nothing -> WARN( isUserImportedName sub_name,
+ text "reportUnusedName: not in avail_env" <+> ppr sub_name )
+ Avail sub_name
+
+ , case parent_avail of { AvailTC _ _ -> True; other -> False }
]
defined_names = mkNameSet (concat (rdrEnvElts gbl_env))
nameSetToList (defined_names `minusNameSet` really_used_names)
-- Filter out the ones only defined implicitly
- bad_guys = filter reportableUnusedName defined_but_not_used
- in
- warnUnusedTopNames bad_guys
+ bad_locals = [n | n <- defined_but_not_used, isLocallyDefined n]
+ bad_imps = [n | n <- defined_but_not_used, isUserImportedExplicitlyName n]
-reportableUnusedName :: Name -> Bool
-reportableUnusedName name
- = explicitlyImported (getNameProvenance name)
- where
- explicitlyImported (LocalDef _ _) = True
- -- Report unused defns of local vars
- explicitlyImported (NonLocalDef (UserImport _ _ expl) _) = expl
- -- Report unused explicit imports
- explicitlyImported other = False
- -- Don't report others
-
-rnStats :: [RenamedHsDecl] -> RnMG ()
-rnStats imp_decls
+ deprec_used deprec_env = [ (n,txt)
+ | n <- nameSetToList mentioned_names,
+ not (isLocallyDefined n),
+ Just txt <- [lookupNameEnv deprec_env n] ]
+ in
+ warnUnusedLocalBinds bad_locals `thenRn_`
+ warnUnusedImports bad_imps `thenRn_`
+ getIfacesRn `thenRn` \ ifaces ->
+ (if opt_WarnDeprecations
+ then mapRn_ warnDeprec (deprec_used (iDeprecs ifaces))
+ else returnRn ())
+
+warnDeprec :: (Name, DeprecTxt) -> RnM d ()
+warnDeprec (name, txt)
+ = pushSrcLocRn (getSrcLoc name) $
+ addWarnRn $
+ sep [ text (occNameFlavour (nameOccName name)) <+> ppr name <+>
+ text "is deprecated:", nest 4 (ppr txt) ]
+
+
+rnDump :: [RenamedHsDecl] -- Renamed imported decls
+ -> [RenamedHsDecl] -- Renamed local decls
+ -> RnMG (IO ())
+rnDump imp_decls decls
| opt_D_dump_rn_trace ||
opt_D_dump_rn_stats ||
opt_D_dump_rn
- = getRnStats imp_decls `thenRn` \ msg ->
- ioToRnM (printErrs msg) `thenRn_`
- returnRn ()
+ = getRnStats imp_decls `thenRn` \ stats_msg ->
- | otherwise = returnRn ()
-\end{code}
+ returnRn (printErrs stats_msg >>
+ dumpIfSet opt_D_dump_rn "Renamer:" (vcat (map ppr decls)))
+ | otherwise = returnRn (return ())
+\end{code}
%*********************************************************
getRnStats imported_decls
= getIfacesRn `thenRn` \ ifaces ->
let
- n_mods = length [() | (_, _, Just _) <- eltsFM (iImpModInfo ifaces)]
+ n_mods = length [() | (_, _, _, Just _) <- eltsFM (iImpModInfo ifaces)]
decls_read = [decl | (_, avail, True, (_,decl)) <- nameEnvElts (iDecls ifaces),
-- Data, newtype, and class decls are in the decls_fm
projects / ghc-hetmet.git / blobdiff