\section[Rename]{Renaming and dependency analysis passes}
\begin{code}
-module Rename ( renameModule ) where
+module Rename ( renameModule, closeIfaceDecls, checkOldIface ) where
#include "HsVersions.h"
import HsSyn
import RdrHsSyn ( RdrNameHsModule, RdrNameHsDecl, RdrNameDeprecation,
- RdrNameTyClDecl, RdrNameRuleDecl, RdrNameInstDecl
+ RdrNameTyClDecl, RdrNameRuleDecl, RdrNameInstDecl, RdrNameImportDecl
)
import RnHsSyn ( RenamedHsDecl, RenamedTyClDecl, RenamedRuleDecl, RenamedInstDecl,
- extractHsTyNames, extractHsCtxtTyNames
+ extractHsTyNames,
+ instDeclFVs, tyClDeclFVs, ruleDeclFVs
)
import CmdLineOpts ( DynFlags, DynFlag(..) )
import RnMonad
import RnNames ( getGlobalNames )
-import RnSource ( rnSourceDecls, rnDecl, rnTyClDecl, rnRuleDecl, rnInstDecl )
-import RnIfaces ( getImportedInstDecls, importDecl, mkImportInfo,
- getInterfaceExports,
- getImportedRules, getSlurped,
- ImportDeclResult(..),
+import RnSource ( rnSourceDecls, rnTyClDecl, rnIfaceRuleDecl, rnInstDecl )
+import RnIfaces ( slurpImpDecls, mkImportInfo,
+ getInterfaceExports, closeDecls,
RecompileRequired, recompileRequired
)
import RnHiFiles ( findAndReadIface, removeContext, loadExports, loadFixDecls, loadDeprecs )
-import RnEnv ( availName, availsToNameSet,
- emptyAvailEnv, unitAvailEnv, availEnvElts, plusAvailEnv, sortAvails,
+import RnEnv ( availName,
+ emptyAvailEnv, unitAvailEnv, availEnvElts, plusAvailEnv, groupAvails,
warnUnusedImports, warnUnusedLocalBinds, warnUnusedModules,
- lookupOrigNames, lookupGlobalRn, newGlobalName,
- FreeVars, plusFVs, plusFV, unitFV, emptyFVs, isEmptyFVs, addOneFV
+ lookupOrigNames, lookupGlobalRn, newGlobalName
)
import Module ( Module, ModuleName, WhereFrom(..),
- moduleNameUserString, moduleName,
- lookupModuleEnv
+ moduleNameUserString, moduleName
)
import Name ( Name, isLocallyDefined, NamedThing(..), getSrcLoc,
- nameOccName, nameUnique, nameModule,
+ nameOccName, nameModule,
mkNameEnv, nameEnvElts, extendNameEnv
)
+import RdrName ( elemRdrEnv )
import OccName ( occNameFlavour )
-import Id ( idType )
-import TyCon ( isSynTyCon, getSynTyConDefn )
import NameSet
-import TysWiredIn ( unitTyCon, intTyCon, doubleTyCon, boolTyCon )
+import TysWiredIn ( unitTyCon, intTyCon, boolTyCon )
import PrelNames ( mAIN_Name, pREL_MAIN_Name, pRELUDE_Name,
- ioTyCon_RDR,
+ ioTyCon_RDR, main_RDR,
unpackCString_RDR, unpackCStringFoldr_RDR, unpackCStringUtf8_RDR,
eqString_RDR
)
-import PrelInfo ( fractionalClassKeys, derivingOccurrences, wiredInThingEnv )
-import Type ( namesOfType, funTyCon )
+import PrelInfo ( derivingOccurrences )
+import Type ( funTyCon )
import ErrUtils ( dumpIfSet )
import Bag ( bagToList )
import FiniteMap ( FiniteMap, eltsFM, fmToList, emptyFM, lookupFM,
import Maybes ( maybeToBool, catMaybes )
import Outputable
import IO ( openFile, IOMode(..) )
-import HscTypes ( Finder, PersistentCompilerState, HomeIfaceTable, HomeSymbolTable,
- ModIface(..), TyThing(..), WhatsImported(..),
+import HscTypes ( PersistentCompilerState, HomeIfaceTable, HomeSymbolTable,
+ ModIface(..), WhatsImported(..),
VersionInfo(..), ImportVersion, IfaceDecls(..),
- GlobalRdrEnv, AvailEnv, Avails, GenAvailInfo(..), AvailInfo,
+ GlobalRdrEnv, AvailEnv, GenAvailInfo(..), AvailInfo,
Provenance(..), ImportReason(..), initialVersionInfo,
- Deprecations(..), lookupDeprec
+ Deprecations(..), lookupDeprec, lookupTable
)
import List ( partition, nub )
\end{code}
%*********************************************************
\begin{code}
-renameModule :: DynFlags -> Finder
+renameModule :: DynFlags
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
-> Module -> RdrNameHsModule
-> IO (PersistentCompilerState, Maybe (ModIface, [RenamedHsDecl]))
-- Nothing => some error occurred in the renamer
-renameModule dflags finder hit hst old_pcs this_module rdr_module
+renameModule dflags hit hst old_pcs this_module rdr_module
= -- Initialise the renamer monad
do {
- (new_pcs, errors_found, (maybe_rn_stuff, dump_action))
- <- initRn dflags finder hit hst old_pcs this_module (rename this_module rdr_module) ;
-
- -- Dump any debugging output
- dump_action ;
+ (new_pcs, errors_found, maybe_rn_stuff)
+ <- initRn dflags hit hst old_pcs this_module (rename this_module rdr_module) ;
-- Return results. No harm in updating the PCS
if errors_found then
\end{code}
\begin{code}
-rename :: Module -> RdrNameHsModule -> RnMG (Maybe (ModIface, [RenamedHsDecl]), IO ())
-rename this_module this_mod@(HsModule mod_name vers exports imports local_decls mod_deprec loc)
- = -- FIND THE GLOBAL NAME ENVIRONMENT
- getGlobalNames this_mod `thenRn` \ maybe_stuff ->
-
- -- CHECK FOR EARLY EXIT
- case maybe_stuff of {
- Nothing -> -- Everything is up to date; no need to recompile further
- rnDump [] [] `thenRn` \ dump_action ->
- returnRn (Nothing, dump_action) ;
+rename :: Module -> RdrNameHsModule -> RnMG (Maybe (ModIface, [RenamedHsDecl]))
+rename this_module contents@(HsModule _ _ _ imports local_decls mod_deprec loc)
+ = pushSrcLocRn loc $
- Just (gbl_env, local_gbl_env, export_avails, global_avail_env) ->
+ -- FIND THE GLOBAL NAME ENVIRONMENT
+ getGlobalNames this_module contents `thenRn` \ (gbl_env, local_gbl_env,
+ export_avails, global_avail_env) ->
+ -- Exit if we've found any errors
+ checkErrsRn `thenRn` \ no_errs_so_far ->
+ if not no_errs_so_far then
+ -- Found errors already, so exit now
+ rnDump [] [] `thenRn_`
+ returnRn Nothing
+ else
+
-- DEAL WITH DEPRECATIONS
rnDeprecs local_gbl_env mod_deprec
[d | DeprecD d <- local_decls] `thenRn` \ my_deprecs ->
rnSourceDecls local_decls
) `thenRn` \ (rn_local_decls, source_fvs) ->
+ -- CHECK THAT main IS DEFINED, IF REQUIRED
+ checkMain this_module local_gbl_env `thenRn_`
+
-- SLURP IN ALL THE NEEDED DECLARATIONS
implicitFVs mod_name rn_local_decls `thenRn` \ implicit_fvs ->
let
slurpImpDecls slurp_fvs `thenRn` \ rn_imp_decls ->
-- EXIT IF ERRORS FOUND
- rnDump rn_imp_decls rn_local_decls `thenRn` \ dump_action ->
+ rnDump rn_imp_decls rn_local_decls `thenRn_`
checkErrsRn `thenRn` \ no_errs_so_far ->
if not no_errs_so_far then
-- Found errors already, so exit now
- returnRn (Nothing, dump_action)
+ returnRn Nothing
else
-- GENERATE THE VERSION/USAGE INFO
getNameSupplyRn `thenRn` \ name_supply ->
getIfacesRn `thenRn` \ ifaces ->
let
- direct_import_mods :: [ModuleName]
- direct_import_mods = nub [m | ImportDecl m _ _ _ _ _ <- imports]
-
-- We record fixities even for things that aren't exported,
-- so that we can change into the context of this moodule easily
fixities = mkNameEnv [ (name, fixity)
-- Sort the exports to make them easier to compare for versions
- my_exports = sortAvails export_avails
+ my_exports = groupAvails this_module export_avails
mod_iface = ModIface { mi_module = this_module,
mi_version = initialVersionInfo,
in
-- REPORT UNUSED NAMES, AND DEBUG DUMP
- reportUnusedNames mod_name direct_import_mods
- gbl_env global_avail_env
- export_avails source_fvs
- rn_imp_decls `thenRn_`
+ reportUnusedNames mod_iface imports global_avail_env
+ real_source_fvs rn_imp_decls `thenRn_`
- returnRn (Just (mod_iface, final_decls), dump_action) }
+ returnRn (Just (mod_iface, final_decls))
+ where
+ mod_name = moduleName this_module
+\end{code}
+
+Checking that main is defined
+
+\begin{code}
+checkMain :: Module -> GlobalRdrEnv -> RnMG ()
+checkMain this_mod local_env
+ | moduleName this_mod == mAIN_Name
+ = checkRn (main_RDR `elemRdrEnv` local_env) noMainErr
+ | otherwise
+ = returnRn ()
\end{code}
@implicitFVs@ forces the renamer to slurp in some things which aren't
%*********************************************************
%* *
-\subsection{Slurping declarations}
-%* *
-%*********************************************************
-
-\begin{code}
--------------------------------------------------------
-slurpImpDecls source_fvs
- = traceRn (text "slurpImp" <+> fsep (map ppr (nameSetToList source_fvs))) `thenRn_`
-
- -- The current slurped-set records all local things
- getSlurped `thenRn` \ source_binders ->
- slurpSourceRefs source_binders source_fvs `thenRn` \ (decls, needed) ->
-
- -- Then get everything else
- closeDecls decls needed `thenRn` \ decls1 ->
-
- -- Finally, get any deferred data type decls
- slurpDeferredDecls decls1 `thenRn` \ final_decls ->
-
- returnRn final_decls
-
--------------------------------------------------------
-slurpSourceRefs :: NameSet -- Variables defined in source
- -> FreeVars -- Variables referenced in source
- -> RnMG ([RenamedHsDecl],
- FreeVars) -- Un-satisfied needs
--- The declaration (and hence home module) of each gate has
--- already been loaded
-
-slurpSourceRefs source_binders source_fvs
- = go_outer [] -- Accumulating decls
- emptyFVs -- Unsatisfied needs
- emptyFVs -- Accumulating gates
- (nameSetToList source_fvs) -- Things whose defn hasn't been loaded yet
- where
- -- The outer loop repeatedly slurps the decls for the current gates
- -- and the instance decls
-
- -- The outer loop is needed because consider
- -- instance Foo a => Baz (Maybe a) where ...
- -- It may be that @Baz@ and @Maybe@ are used in the source module,
- -- but not @Foo@; so we need to chase @Foo@ too.
- --
- -- We also need to follow superclass refs. In particular, 'chasing @Foo@' must
- -- include actually getting in Foo's class decl
- -- class Wib a => Foo a where ..
- -- so that its superclasses are discovered. The point is that Wib is a gate too.
- -- We do this for tycons too, so that we look through type synonyms.
-
- go_outer decls fvs all_gates []
- = returnRn (decls, fvs)
-
- go_outer decls fvs all_gates refs -- refs are not necessarily slurped yet
- = traceRn (text "go_outer" <+> ppr refs) `thenRn_`
- foldlRn go_inner (decls, fvs, emptyFVs) refs `thenRn` \ (decls1, fvs1, gates1) ->
- getImportedInstDecls (all_gates `plusFV` gates1) `thenRn` \ inst_decls ->
- 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 if we don't slurp any new
- -- decls we can get some apparently-new gates from wired-in names
-
- go_inner (decls, fvs, gates) wanted_name
- = importDecl wanted_name `thenRn` \ import_result ->
- case import_result of
- AlreadySlurped -> returnRn (decls, fvs, gates)
- WiredIn -> returnRn (decls, fvs, gates `plusFV` getWiredInGates wanted_name)
- Deferred -> returnRn (decls, fvs, gates `addOneFV` wanted_name) -- It's a type constructor
-
- HereItIs decl -> rnIfaceTyClDecl decl `thenRn` \ (new_decl, fvs1) ->
- returnRn (TyClD new_decl : decls,
- fvs1 `plusFV` fvs,
- gates `plusFV` getGates source_fvs new_decl)
-
-rnInstDecls decls fvs gates []
- = returnRn (decls, fvs, gates)
-rnInstDecls decls fvs gates (d:ds)
- = rnIfaceDecl d `thenRn` \ (new_decl, fvs1) ->
- rnInstDecls (new_decl:decls)
- (fvs1 `plusFV` fvs)
- (gates `plusFV` getInstDeclGates new_decl)
- ds
-\end{code}
-
-
-\begin{code}
--------------------------------------------------------
--- closeDecls keeps going until the free-var set is empty
-closeDecls decls needed
- | not (isEmptyFVs needed)
- = slurpDecls decls needed `thenRn` \ (decls1, needed1) ->
- closeDecls decls1 needed1
-
- | otherwise
- = getImportedRules `thenRn` \ rule_decls ->
- case rule_decls of
- [] -> returnRn decls -- No new rules, so we are done
- other -> rnIfaceDecls decls emptyFVs rule_decls `thenRn` \ (decls1, needed1) ->
- closeDecls decls1 needed1
-
-
--------------------------------------------------------
--- Augment decls with any decls needed by needed.
--- Return also free vars of the new decls (only)
-slurpDecls decls needed
- = go decls emptyFVs (nameSetToList needed)
- where
- go decls fvs [] = returnRn (decls, fvs)
- go decls fvs (ref:refs) = slurpDecl decls fvs ref `thenRn` \ (decls1, fvs1) ->
- go decls1 fvs1 refs
-
--------------------------------------------------------
-slurpDecl decls fvs wanted_name
- = importDecl wanted_name `thenRn` \ import_result ->
- case import_result of
- -- Found a declaration... rename it
- HereItIs decl -> rnIfaceTyClDecl decl `thenRn` \ (new_decl, fvs1) ->
- returnRn (TyClD new_decl:decls, fvs1 `plusFV` fvs)
-
- -- No declaration... (wired in thing, or deferred, or already slurped)
- other -> returnRn (decls, fvs)
-
-
--------------------------------------------------------
-rnIfaceDecls :: [RenamedHsDecl] -> FreeVars
- -> [(Module, RdrNameHsDecl)]
- -> RnM d ([RenamedHsDecl], FreeVars)
-rnIfaceDecls decls fvs [] = returnRn (decls, fvs)
-rnIfaceDecls decls fvs (d:ds) = rnIfaceDecl d `thenRn` \ (new_decl, fvs1) ->
- rnIfaceDecls (new_decl:decls) (fvs1 `plusFV` fvs) ds
-
-rnIfaceDecl (mod, decl) = initIfaceRnMS mod (rnDecl decl)
-rnIfaceTyClDecl (mod, decl) = initIfaceRnMS mod (rnTyClDecl decl)
-\end{code}
-
-
-%*********************************************************
-%* *
-\subsection{Deferred declarations}
-%* *
-%*********************************************************
-
-The idea of deferred declarations is this. Suppose we have a function
- f :: T -> Int
- data T = T1 A | T2 B
- data A = A1 X | A2 Y
- data B = B1 P | B2 Q
-Then we don't want to load T and all its constructors, and all
-the types those constructors refer to, and all the types *those*
-constructors refer to, and so on. That might mean loading many more
-interface files than is really necessary. So we 'defer' loading T.
-
-But f might be strict, and the calling convention for evaluating
-values of type T depends on how many constructors T has, so
-we do need to load T, but not the full details of the type T.
-So we load the full decl for T, but only skeleton decls for A and B:
- f :: T -> Int
- data T = {- 2 constructors -}
-
-Whether all this is worth it is moot.
-
-\begin{code}
-slurpDeferredDecls :: [RenamedHsDecl] -> RnMG [RenamedHsDecl]
-slurpDeferredDecls decls = returnRn decls
-
-{- OMIT FOR NOW
-slurpDeferredDecls :: [RenamedHsDecl] -> RnMG [RenamedHsDecl]
-slurpDeferredDecls decls
- = getDeferredDecls `thenRn` \ def_decls ->
- rnIfaceDecls decls emptyFVs (map stripDecl def_decls) `thenRn` \ (decls1, fvs) ->
- ASSERT( isEmptyFVs fvs )
- returnRn decls1
-
-stripDecl (mod, TyClD (TyData dt _ tc tvs _ nconstrs _ loc name1 name2))
- = (mod, TyClD (TyData dt [] tc tvs [] nconstrs Nothing loc
- name1 name2))
- -- Nuke the context and constructors
- -- But retain the *number* of constructors!
- -- Also the tvs will have kinds on them.
--}
-\end{code}
-
-
-%*********************************************************
-%* *
-\subsection{Extracting the `gates'}
-%* *
-%*********************************************************
-
-When we import a declaration like
-\begin{verbatim}
- data T = T1 Wibble | T2 Wobble
-\end{verbatim}
-we don't want to treat @Wibble@ and @Wobble@ as gates
-{\em unless} @T1@, @T2@ respectively are mentioned by the user program.
-If only @T@ is mentioned
-we want only @T@ to be a gate;
-that way we don't suck in useless instance
-decls for (say) @Eq Wibble@, when they can't possibly be useful.
-
-@getGates@ takes a newly imported (and renamed) decl, and the free
-vars of the source program, and extracts from the decl the gate names.
-
-\begin{code}
-getGates source_fvs (IfaceSig _ ty _ _)
- = extractHsTyNames ty
-
-getGates source_fvs (ClassDecl ctxt cls tvs _ sigs _ _ _ )
- = (delListFromNameSet (foldr (plusFV . get) (extractHsCtxtTyNames ctxt) sigs)
- (hsTyVarNames tvs)
- `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 (TySynonym tycon tvs ty _)
- = delListFromNameSet (extractHsTyNames ty)
- (hsTyVarNames tvs)
- -- A type synonym type constructor isn't a "gate" for instance decls
-
-getGates source_fvs (TyData _ ctxt tycon tvs cons _ _ _ _ _)
- = delListFromNameSet (foldr (plusFV . get) (extractHsCtxtTyNames ctxt) cons)
- (hsTyVarNames tvs)
- `addOneToNameSet` tycon
- where
- 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)
- (hsTyVarNames tvs)
- 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
- -- the deleteListFromNameSet part
- = foldr (plusFV . get_field) emptyFVs fields
-
- get other_con = emptyFVs
-
- get_details (VanillaCon tys) = plusFVs (map get_bang tys)
- get_details (InfixCon t1 t2) = get_bang t1 `plusFV` get_bang t2
- get_details (RecCon fields) = plusFVs [get_bang t | (_, t) <- fields]
-
- get_field (fs,t) | any (`elemNameSet` source_fvs) fs = get_bang t
- | otherwise = emptyFVs
-
- get_bang bty = extractHsTyNames (getBangType bty)
-\end{code}
-
-@getWiredInGates@ is just like @getGates@, but it sees a wired-in @Name@
-rather than a declaration.
-
-\begin{code}
-getWiredInGates :: Name -> FreeVars
-getWiredInGates name -- No classes are wired in
- = case lookupNameEnv wiredInThingEnv name of
- Just (AnId the_id) -> getWiredInGates_s (namesOfType (idType the_id))
-
- Just (ATyCon tc)
- | isSynTyCon tc
- -> getWiredInGates_s (delListFromNameSet (namesOfType ty) (map getName tyvars))
- where
- (tyvars,ty) = getSynTyConDefn tc
-
- other -> unitFV name
-
-getWiredInGates_s names = foldr (plusFV . getWiredInGates) emptyFVs (nameSetToList names)
-\end{code}
-
-\begin{code}
-getInstDeclGates (InstD (InstDecl inst_ty _ _ _ _)) = extractHsTyNames inst_ty
-getInstDeclGates other = emptyFVs
-\end{code}
-
-
-%*********************************************************
-%* *
\subsection{Fixities}
%* *
%*********************************************************
= pushSrcLocRn loc $
lookupGlobalRn gbl_env rdr_name `thenRn` \ maybe_name ->
case maybe_name of
- Just n -> returnRn (Just (n,txt))
+ Just n -> returnRn (Just (n,(n,txt)))
Nothing -> returnRn Nothing
\end{code}
%************************************************************************
\begin{code}
-checkOldIface :: DynFlags -> Finder
+checkOldIface :: DynFlags
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
-> Module
-> IO (PersistentCompilerState, Bool, (RecompileRequired, Maybe ModIface))
-- True <=> errors happened
-checkOldIface dflags finder hit hst pcs mod source_unchanged maybe_iface
- = initRn dflags finder hit hst pcs mod $
+checkOldIface dflags hit hst pcs mod source_unchanged maybe_iface
+ = initRn dflags hit hst pcs mod $
-- Load the old interface file, if we havn't already got it
loadOldIface mod maybe_iface `thenRn` \ maybe_iface ->
-> (Version, RdrNameTyClDecl)
-> RnMS (NameEnv Version, [RenamedTyClDecl])
loadHomeDecl (version_map, decls) (version, decl)
- = rnTyClDecl decl `thenRn` \ (decl', _) ->
+ = rnTyClDecl decl `thenRn` \ decl' ->
returnRn (extendNameEnv version_map (tyClDeclName decl') version, decl':decls)
------------------
loadHomeRules :: (Version, [RdrNameRuleDecl])
-> RnMS (Version, [RenamedRuleDecl])
loadHomeRules (version, rules)
- = mapAndUnzipRn rnRuleDecl rules `thenRn` \ (rules', _) ->
+ = mapRn rnIfaceRuleDecl rules `thenRn` \ rules' ->
returnRn (version, rules')
------------------
loadHomeInsts :: [RdrNameInstDecl]
-> RnMS [RenamedInstDecl]
-loadHomeInsts insts = mapAndUnzipRn rnInstDecl insts `thenRn` \ (insts', _) ->
- returnRn insts'
+loadHomeInsts insts = mapRn rnInstDecl insts
------------------
loadHomeUsage :: ImportVersion OccName
\end{code}
+
+%*********************************************************
+%* *
+\subsection{Closing up the interface decls}
+%* *
+%*********************************************************
+
+Suppose we discover we don't need to recompile. Then we start from the
+IfaceDecls in the ModIface, and fluff them up by sucking in all the decls they need.
+
+\begin{code}
+closeIfaceDecls :: DynFlags
+ -> HomeIfaceTable -> HomeSymbolTable
+ -> PersistentCompilerState
+ -> ModIface -- Get the decls from here
+ -> IO (PersistentCompilerState, Bool, [RenamedHsDecl])
+ -- True <=> errors happened
+closeIfaceDecls dflags hit hst pcs
+ mod_iface@(ModIface { mi_module = mod, mi_decls = iface_decls })
+ = initRn dflags hit hst pcs mod $
+
+ let
+ rule_decls = dcl_rules iface_decls
+ inst_decls = dcl_insts iface_decls
+ tycl_decls = dcl_tycl iface_decls
+ decls = map RuleD rule_decls ++
+ map InstD inst_decls ++
+ map TyClD tycl_decls
+ needed = unionManyNameSets (map ruleDeclFVs rule_decls) `unionNameSets`
+ unionManyNameSets (map instDeclFVs inst_decls) `unionNameSets`
+ unionManyNameSets (map tyClDeclFVs tycl_decls)
+ in
+ closeDecls decls needed
+\end{code}
+
%*********************************************************
%* *
\subsection{Unused names}
%*********************************************************
\begin{code}
-reportUnusedNames :: ModuleName -> [ModuleName]
- -> GlobalRdrEnv -> AvailEnv
- -> Avails -> NameSet -> [RenamedHsDecl]
+reportUnusedNames :: ModIface -> [RdrNameImportDecl]
+ -> AvailEnv
+ -> NameSet
+ -> [RenamedHsDecl]
-> RnMG ()
-reportUnusedNames mod_name direct_import_mods
- gbl_env avail_env
- export_avails mentioned_names
- imported_decls
+reportUnusedNames my_mod_iface imports avail_env
+ used_names imported_decls
= warnUnusedModules unused_imp_mods `thenRn_`
warnUnusedLocalBinds bad_locals `thenRn_`
warnUnusedImports bad_imp_names `thenRn_`
- printMinimalImports mod_name minimal_imports `thenRn_`
- warnDeprecations really_used_names `thenRn_`
+ printMinimalImports my_mod_iface minimal_imports `thenRn_`
+ warnDeprecations my_mod_iface really_used_names `thenRn_`
returnRn ()
where
- used_names = mentioned_names `unionNameSets` availsToNameSet export_avails
+ gbl_env = mi_globals my_mod_iface
-- Now, a use of C implies a use of T,
-- if C was brought into scope by T(..) or T(C)
| otherwise = addToFM acc m emptyAvailEnv
-- Add an empty collection of imports for a module
-- from which we have sucked only instance decls
-
+
+ direct_import_mods :: [ModuleName]
+ direct_import_mods = nub [m | ImportDecl m _ _ _ _ _ <- imports]
+
-- unused_imp_mods are the directly-imported modules
-- that are not mentioned in minimal_imports
unused_imp_mods = [m | m <- direct_import_mods,
module_unused mod = moduleName mod `elem` unused_imp_mods
-warnDeprecations used_names
+warnDeprecations my_mod_iface used_names
= doptRn Opt_WarnDeprecations `thenRn` \ warn_drs ->
if not warn_drs then returnRn () else
mapRn_ warnDeprec deprecs
where
- lookup_deprec hit pit n
- = case lookupModuleEnv hit mod of
- Just iface -> lookupDeprec iface n
- Nothing -> case lookupModuleEnv pit mod of
- Just iface -> lookupDeprec iface n
- Nothing -> pprPanic "warnDeprecations:" (ppr n)
- where
- mod = nameModule n
+ mod = mi_module my_mod_iface
+ my_deprecs = mi_deprecs my_mod_iface
+ lookup_deprec hit pit n
+ | isLocalThing mod n = lookupDeprec my_deprecs n
+ | otherwise = case lookupTable hit pit n of
+ Just iface -> lookupDeprec (mi_deprecs iface) n
+ Nothing -> pprPanic "warnDeprecations:" (ppr n)
-- ToDo: deal with original imports with 'qualified' and 'as M' clauses
-printMinimalImports mod_name imps
+printMinimalImports my_mod_iface imps
= doptRn Opt_D_dump_minimal_imports `thenRn` \ dump_minimal ->
if not dump_minimal then returnRn () else
}) `thenRn_`
returnRn ()
where
- filename = moduleNameUserString mod_name ++ ".imports"
+ filename = moduleNameUserString (moduleName (mi_module my_mod_iface))
+ ++ ".imports"
ppr_mod_ie (mod_name, ies)
| mod_name == pRELUDE_Name
= empty
to_ie (Avail n) = returnRn (IEVar n)
to_ie (AvailTC n [m]) = ASSERT( n==m )
returnRn (IEThingAbs n)
- to_ie (AvailTC n ns) = getInterfaceExports (moduleName (nameModule n))
- ImportBySystem `thenRn` \ (_, avails) ->
- case [ms | AvailTC m ms <- avails, m == n] of
- [ms] | all (`elem` ns) ms -> returnRn (IEThingAll n)
- | otherwise -> returnRn (IEThingWith n (filter (/= n) ns))
- other -> pprTrace "to_ie" (ppr n <+> ppr (nameModule n) <+> ppr other) $
- returnRn (IEVar n)
+ to_ie (AvailTC n ns)
+ = getInterfaceExports n_mod ImportBySystem `thenRn` \ (_, avails_by_module) ->
+ case [xs | (m,as) <- avails_by_module,
+ m == n_mod,
+ AvailTC x xs <- as,
+ x == n] of
+ [xs] | all (`elem` ns) xs -> returnRn (IEThingAll n)
+ | otherwise -> returnRn (IEThingWith n (filter (/= n) ns))
+ other -> pprTrace "to_ie" (ppr n <+> ppr (nameModule n) <+> ppr other) $
+ returnRn (IEVar n)
+ where
+ n_mod = moduleName (nameModule n)
rnDump :: [RenamedHsDecl] -- Renamed imported decls
-> [RenamedHsDecl] -- Renamed local decls
- -> RnMG (IO ())
+ -> RnMG ()
rnDump imp_decls local_decls
- = doptRn Opt_D_dump_rn_trace `thenRn` \ dump_rn_trace ->
- doptRn Opt_D_dump_rn_stats `thenRn` \ dump_rn_stats ->
- doptRn Opt_D_dump_rn `thenRn` \ dump_rn ->
- if dump_rn_trace || dump_rn_stats || dump_rn then
- getRnStats imp_decls `thenRn` \ stats_msg ->
- returnRn (printErrs stats_msg >>
- dumpIfSet dump_rn "Renamer:"
- (vcat (map ppr (local_decls ++ imp_decls))))
- else
- returnRn (return ())
+ = doptRn Opt_D_dump_rn_trace `thenRn` \ dump_rn_trace ->
+ doptRn Opt_D_dump_rn_stats `thenRn` \ dump_rn_stats ->
+ doptRn Opt_D_dump_rn `thenRn` \ dump_rn ->
+ getIfacesRn `thenRn` \ ifaces ->
+
+ ioToRnM (do { dumpIfSet (dump_rn_trace || dump_rn_stats || dump_rn)
+ "Renamer statistics"
+ (getRnStats imp_decls ifaces) ;
+
+ dumpIfSet dump_rn "Renamer:"
+ (vcat (map ppr (local_decls ++ imp_decls)))
+ }) `thenRn_`
+
+ returnRn ()
\end{code}
%*********************************************************
\begin{code}
-getRnStats :: [RenamedHsDecl] -> RnMG SDoc
-getRnStats imported_decls
- = getIfacesRn `thenRn` \ ifaces ->
- let
- n_mods = length [() | (_, _, True) <- eltsFM (iImpModInfo ifaces)]
-
- decls_read = [decl | (avail, True, (_,decl)) <- nameEnvElts (iDecls ifaces),
- -- Data, newtype, and class decls are in the decls_fm
- -- under multiple names; the tycon/class, and each
- -- constructor/class op too.
- -- The 'True' selects just the 'main' decl
- not (isLocallyDefined (availName avail))
- ]
-
- (cd_rd, dd_rd, nd_rd, sd_rd, vd_rd) = countTyClDecls decls_read
- (cd_sp, dd_sp, nd_sp, sd_sp, vd_sp, id_sp) = count_decls imported_decls
-
- unslurped_insts = iInsts ifaces
- inst_decls_unslurped = length (bagToList unslurped_insts)
- inst_decls_read = id_sp + inst_decls_unslurped
-
- stats = vcat
- [int n_mods <+> text "interfaces read",
- hsep [ int cd_sp, text "class decls imported, out of",
- int cd_rd, text "read"],
- hsep [ int dd_sp, text "data decls imported, out of",
- int dd_rd, text "read"],
- hsep [ int nd_sp, text "newtype decls imported, out of",
- int nd_rd, text "read"],
- hsep [int sd_sp, text "type synonym decls imported, out of",
- int sd_rd, text "read"],
- hsep [int vd_sp, text "value signatures imported, out of",
- int vd_rd, text "read"],
- hsep [int id_sp, text "instance decls imported, out of",
- int inst_decls_read, text "read"],
- text "cls dcls slurp" <+> fsep (map (ppr . tyClDeclName)
- [d | TyClD d <- imported_decls, isClassDecl d]),
- text "cls dcls read" <+> fsep (map (ppr . tyClDeclName)
+getRnStats :: [RenamedHsDecl] -> Ifaces -> SDoc
+getRnStats imported_decls ifaces
+ = hcat [text "Renamer stats: ", stats]
+ where
+ n_mods = length [() | (_, _, True) <- eltsFM (iImpModInfo ifaces)]
+
+ decls_read = [decl | (avail, True, (_,decl)) <- nameEnvElts (iDecls ifaces),
+ -- Data, newtype, and class decls are in the decls_fm
+ -- under multiple names; the tycon/class, and each
+ -- constructor/class op too.
+ -- The 'True' selects just the 'main' decl
+ not (isLocallyDefined (availName avail))
+ ]
+
+ (cd_rd, dd_rd, nd_rd, sd_rd, vd_rd) = countTyClDecls decls_read
+ (cd_sp, dd_sp, nd_sp, sd_sp, vd_sp, id_sp) = count_decls imported_decls
+
+ unslurped_insts = iInsts ifaces
+ inst_decls_unslurped = length (bagToList unslurped_insts)
+ inst_decls_read = id_sp + inst_decls_unslurped
+
+ stats = vcat
+ [int n_mods <+> text "interfaces read",
+ hsep [ int cd_sp, text "class decls imported, out of",
+ int cd_rd, text "read"],
+ hsep [ int dd_sp, text "data decls imported, out of",
+ int dd_rd, text "read"],
+ hsep [ int nd_sp, text "newtype decls imported, out of",
+ int nd_rd, text "read"],
+ hsep [int sd_sp, text "type synonym decls imported, out of",
+ int sd_rd, text "read"],
+ hsep [int vd_sp, text "value signatures imported, out of",
+ int vd_rd, text "read"],
+ hsep [int id_sp, text "instance decls imported, out of",
+ int inst_decls_read, text "read"],
+ text "cls dcls slurp" <+> fsep (map (ppr . tyClDeclName)
+ [d | TyClD d <- imported_decls, isClassDecl d]),
+ text "cls dcls read" <+> fsep (map (ppr . tyClDeclName)
[d | d <- decls_read, isClassDecl d])]
- in
- returnRn (hcat [text "Renamer stats: ", stats])
count_decls decls
= (class_decls,
badDeprec d
= sep [ptext SLIT("Illegal deprecation when whole module is deprecated"),
nest 4 (ppr d)]
+
+noMainErr
+ = hsep [ptext SLIT("Module"), quotes (ppr mAIN_Name),
+ ptext SLIT("must include a definition for"), quotes (ptext SLIT("main"))]
\end{code}