\section[Rename]{Renaming and dependency analysis passes}
\begin{code}
-module Rename ( renameModule ) where
+module Rename ( renameModule, closeIfaceDecls ) where
#include "HsVersions.h"
import HsSyn
-import HsPragmas ( DataPragmas(..) )
-import RdrHsSyn ( RdrNameHsModule, RdrNameHsDecl, RdrNameDeprecation )
-import RnHsSyn ( RenamedHsModule, RenamedHsDecl,
- extractHsTyNames, extractHsCtxtTyNames
+import RdrHsSyn ( RdrNameHsModule, RdrNameHsDecl, RdrNameDeprecation,
+ RdrNameTyClDecl, RdrNameRuleDecl, RdrNameInstDecl
+ )
+import RnHsSyn ( RenamedHsDecl, RenamedTyClDecl, RenamedRuleDecl, RenamedInstDecl,
+ extractHsTyNames,
+ instDeclFVs, tyClDeclFVs, ruleDeclFVs
)
-import CmdLineOpts ( opt_HiMap, opt_D_dump_rn_trace, opt_D_dump_minimal_imports,
- opt_D_dump_rn, opt_D_dump_rn_stats, opt_WarnDeprecations,
- opt_WarnUnusedBinds
- )
+import CmdLineOpts ( DynFlags, DynFlag(..) )
import RnMonad
import RnNames ( getGlobalNames )
-import RnSource ( rnSourceDecls, rnDecl )
-import RnIfaces ( getImportedInstDecls, importDecl, mkImportExportInfo, getInterfaceExports,
- getImportedRules, getSlurped, removeContext,
- loadBuiltinRules, getDeferredDecls, 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,
+ emptyAvailEnv, unitAvailEnv, availEnvElts, plusAvailEnv, groupAvails,
warnUnusedImports, warnUnusedLocalBinds, warnUnusedModules,
- lookupOrigNames, unknownNameErr,
- FreeVars, plusFVs, plusFV, unitFV, emptyFVs, isEmptyFVs, addOneFV
+ lookupOrigNames, lookupGlobalRn, newGlobalName
)
import Module ( Module, ModuleName, WhereFrom(..),
- moduleNameUserString, mkSearchPath, moduleName, mkThisModule
+ moduleNameUserString, moduleName,
+ lookupModuleEnv
)
import Name ( Name, isLocallyDefined, NamedThing(..), getSrcLoc,
- nameOccName, nameUnique, nameModule, maybeUserImportedFrom,
- isUserImportedExplicitlyName, isUserImportedName,
- maybeWiredInTyConName, maybeWiredInIdName,
- isUserExportedName, toRdrName,
- nameEnvElts, extendNameEnv
+ nameOccName, nameModule,
+ mkNameEnv, nameEnvElts, extendNameEnv
)
-import OccName ( occNameFlavour, isValOcc )
-import Id ( idType )
-import TyCon ( isSynTyCon, getSynTyConDefn )
+import OccName ( occNameFlavour )
import NameSet
-import TysWiredIn ( unitTyCon, intTyCon, doubleTyCon, boolTyCon )
-import PrelRules ( builtinRules )
-import PrelInfo ( mAIN_Name, pREL_MAIN_Name, pRELUDE_Name,
- ioTyCon_RDR, unpackCString_RDR, unpackCString2_RDR, unpackCStringFoldr_RDR,
- fractionalClassKeys, derivingOccurrences
+import TysWiredIn ( unitTyCon, intTyCon, boolTyCon )
+import PrelNames ( mAIN_Name, pREL_MAIN_Name, pRELUDE_Name,
+ ioTyCon_RDR,
+ unpackCString_RDR, unpackCStringFoldr_RDR, unpackCStringUtf8_RDR,
+ eqString_RDR
)
-import Type ( namesOfType, funTyCon )
-import ErrUtils ( printErrorsAndWarnings, dumpIfSet, ghcExit )
-import BasicTypes ( Version, initialVersion )
-import Bag ( isEmptyBag, bagToList )
+import PrelInfo ( derivingOccurrences )
+import Type ( funTyCon )
+import ErrUtils ( dumpIfSet )
+import Bag ( bagToList )
import FiniteMap ( FiniteMap, eltsFM, fmToList, emptyFM, lookupFM,
addToFM_C, elemFM, addToFM
)
-import UniqSupply ( UniqSupply )
import UniqFM ( lookupUFM )
-import SrcLoc ( noSrcLoc )
-import Maybes ( maybeToBool, expectJust )
+import Maybes ( maybeToBool, catMaybes )
import Outputable
import IO ( openFile, IOMode(..) )
+import HscTypes ( Finder, PersistentCompilerState, HomeIfaceTable, HomeSymbolTable,
+ ModIface(..), WhatsImported(..),
+ VersionInfo(..), ImportVersion, IfaceDecls(..),
+ GlobalRdrEnv, AvailEnv, Avails, GenAvailInfo(..), AvailInfo,
+ Provenance(..), ImportReason(..), initialVersionInfo,
+ Deprecations(..), lookupDeprec
+ )
+import List ( partition, nub )
\end{code}
+%*********************************************************
+%* *
+\subsection{The main function: rename}
+%* *
+%*********************************************************
+
\begin{code}
-type RenameResult = ( Module -- This module
- , RenamedHsModule -- Renamed module
- , Maybe ParsedIface -- The existing interface file, if any
- , ParsedIface -- The new interface
- , RnNameSupply -- Final env; for renaming derivings
- , FixityEnv -- The fixity environment; for derivings
- , [Module]) -- Imported modules
-
-renameModule :: UniqSupply -> RdrNameHsModule -> IO (Maybe RenameResult)
-renameModule us this_mod@(HsModule mod_name vers exports imports local_decls _ loc)
+renameModule :: DynFlags -> Finder
+ -> 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
= -- Initialise the renamer monad
do {
- ((maybe_rn_stuff, dump_action), rn_errs_bag, rn_warns_bag)
- <- initRn (mkThisModule mod_name) us
- (mkSearchPath opt_HiMap) loc
- (rename this_mod) ;
-
- -- Check for warnings
- printErrorsAndWarnings rn_errs_bag rn_warns_bag ;
-
- -- Dump any debugging output
- dump_action ;
+ (new_pcs, errors_found, maybe_rn_stuff)
+ <- initRn dflags finder hit hst old_pcs this_module (rename this_module rdr_module) ;
- -- Return results
- if not (isEmptyBag rn_errs_bag) then
- do { ghcExit 1 ; return Nothing }
+ -- Return results. No harm in updating the PCS
+ if errors_found then
+ return (new_pcs, Nothing)
else
- return maybe_rn_stuff
+ return (new_pcs, maybe_rn_stuff)
}
\end{code}
\begin{code}
-rename :: RdrNameHsModule -> RnMG (Maybe RenameResult, IO ())
-rename this_mod@(HsModule mod_name vers exports imports local_decls mod_deprec loc)
+rename :: Module -> RdrNameHsModule -> RnMG (Maybe (ModIface, [RenamedHsDecl]))
+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) ;
+ rnDump [] [] `thenRn_`
+ returnRn Nothing ;
- Just (gbl_env, local_gbl_env, export_avails, global_avail_env, old_iface) ->
+ Just (gbl_env, local_gbl_env, export_avails, global_avail_env) ->
-- DEAL WITH DEPRECATIONS
- rnDeprecs local_gbl_env mod_deprec local_decls `thenRn` \ my_deprecs ->
+ rnDeprecs local_gbl_env mod_deprec
+ [d | DeprecD d <- local_decls] `thenRn` \ my_deprecs ->
-- DEAL WITH LOCAL FIXITIES
fixitiesFromLocalDecls local_gbl_env local_decls `thenRn` \ local_fixity_env ->
-- when compiling the prelude, locally-defined (), Bool, etc
-- override the implicit ones.
in
- loadBuiltinRules builtinRules `thenRn_`
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
- mkImportExportInfo mod_name export_avails exports `thenRn` \ (my_exports, my_usages) ->
+ mkImportInfo mod_name imports `thenRn` \ my_usages ->
-- RETURN THE RENAMED MODULE
getNameSupplyRn `thenRn` \ name_supply ->
getIfacesRn `thenRn` \ ifaces ->
let
- direct_import_mods :: [Module]
- direct_import_mods = [m | (_, _, Just (m, _, _, _, ImportByUser, _))
- <- eltsFM (iImpModInfo ifaces)]
- -- Pick just the non-back-edge imports
- -- (Back edges are ImportByUserSource)
-
- this_module = mkThisModule mod_name
-
- -- Export only those fixities that are for names that are
- -- (a) defined in this module
- -- (b) exported
- exported_fixities
- = [ FixitySig (toRdrName name) fixity loc
- | FixitySig name fixity loc <- nameEnvElts local_fixity_env,
- isUserExportedName name
- ]
-
- new_iface = ParsedIface { pi_mod = this_module
- , pi_vers = initialVersion
- , pi_orphan = any isOrphanDecl rn_local_decls
- , pi_exports = my_exports
- , pi_usages = my_usages
- , pi_fixity = (initialVersion, exported_fixities)
- , pi_deprecs = my_deprecs
- -- These ones get filled in later
- , pi_insts = [], pi_decls = []
- , pi_rules = (initialVersion, [])
- }
+ 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)
+ | FixitySig name fixity loc <- nameEnvElts local_fixity_env
+ ]
+
+
+ -- Sort the exports to make them easier to compare for versions
+ my_exports = groupAvails export_avails
- renamed_module = HsModule mod_name vers
- trashed_exports trashed_imports
- (rn_local_decls ++ rn_imp_decls)
- mod_deprec
- loc
-
- result = (this_module, renamed_module,
- old_iface, new_iface,
- name_supply, local_fixity_env,
- direct_import_mods)
+ mod_iface = ModIface { mi_module = this_module,
+ mi_version = initialVersionInfo,
+ mi_orphan = any isOrphanDecl rn_local_decls,
+ mi_exports = my_exports,
+ mi_globals = gbl_env,
+ mi_usages = my_usages,
+ mi_fixities = fixities,
+ mi_deprecs = my_deprecs,
+ mi_decls = panic "mi_decls"
+ }
+
+ final_decls = rn_local_decls ++ rn_imp_decls
in
-- REPORT UNUSED NAMES, AND DEBUG DUMP
export_avails source_fvs
rn_imp_decls `thenRn_`
- returnRn (Just result, dump_action) }
- where
- trashed_exports = {-trace "rnSource:trashed_exports"-} Nothing
- trashed_imports = {-trace "rnSource:trashed_imports"-} []
+ returnRn (Just (mod_iface, final_decls))
+ }
\end{code}
@implicitFVs@ forces the renamer to slurp in some things which aren't
implicit_occs = string_occs ++ foldr ((++) . get) implicit_main decls
-- Virtually every program has error messages in it somewhere
- string_occs = [unpackCString_RDR, unpackCString2_RDR, unpackCStringFoldr_RDR]
+ string_occs = [unpackCString_RDR, unpackCStringFoldr_RDR, unpackCStringUtf8_RDR,
+ eqString_RDR]
- get (TyClD (TyData _ _ _ _ _ _ (Just deriv_classes) _ _))
+ get (TyClD (TyData _ _ _ _ _ _ (Just deriv_classes) _ _ _))
= concat (map get_deriv deriv_classes)
get other = []
check (HsVar v) = not (isLocallyDefined v)
check (HsApp f a) = check f && check a
check (HsLit _) = False
+ check (HsOverLit _) = False
check (OpApp l o _ r) = check l && check o && check r
check (NegApp e _) = check e
check (HsPar e) = check e
\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}
+\subsection{Fixities}
%* *
%*********************************************************
\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
+fixitiesFromLocalDecls :: GlobalRdrEnv -> [RdrNameHsDecl] -> RnMG LocalFixityEnv
+fixitiesFromLocalDecls gbl_env decls
+ = doptRn Opt_WarnUnusedBinds `thenRn` \ warn_unused ->
+ foldlRn (getFixities warn_unused) emptyNameEnv decls `thenRn` \ env ->
+ traceRn (text "fixity env" <+> vcat (map ppr (nameEnvElts env)))
+ `thenRn_`
+ returnRn env
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 -> rnIfaceDecl decl `thenRn` \ (new_decl, fvs1) ->
- returnRn (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}
+ getFixities :: Bool -> LocalFixityEnv -> RdrNameHsDecl -> RnMG LocalFixityEnv
+ getFixities warn_uu acc (FixD fix)
+ = fix_decl warn_uu acc fix
+ getFixities warn_uu acc (TyClD (ClassDecl _ _ _ _ sigs _ _ _ ))
+ = foldlRn (fix_decl warn_uu) acc [sig | FixSig sig <- sigs]
+ -- Get fixities from class decl sigs too.
+ getFixities warn_uu acc other_decl
+ = returnRn acc
-\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 -> rnIfaceDecl decl `thenRn` \ (new_decl, fvs1) ->
- returnRn (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)
+ fix_decl warn_uu acc sig@(FixitySig rdr_name fixity loc)
+ = -- Check for fixity decl for something not declared
+ pushSrcLocRn loc $
+ lookupGlobalRn gbl_env rdr_name `thenRn` \ maybe_name ->
+ case maybe_name of {
+ Nothing -> checkRn (not warn_uu) (unusedFixityDecl rdr_name fixity) `thenRn_`
+ returnRn acc ;
+
+ Just name ->
+
+ -- Check for duplicate fixity decl
+ case lookupNameEnv acc name of {
+ Just (FixitySig _ _ loc') -> addErrRn (dupFixityDecl rdr_name loc loc')
+ `thenRn_` returnRn acc ;
+
+ Nothing -> returnRn (extendNameEnv acc name (FixitySig name fixity loc))
+ }}
\end{code}
%*********************************************************
%* *
-\subsection{Deferred declarations}
+\subsection{Deprecations}
%* *
%*********************************************************
-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.
+For deprecations, all we do is check that the names are in scope.
+It's only imported deprecations, dealt with in RnIfaces, that we
+gather them together.
\begin{code}
-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))
- = (mod, TyClD (TyData dt [] tc tvs [] nconstrs Nothing NoDataPragmas loc))
- -- Nuke the context and constructors
- -- But retain the *number* of constructors!
- -- Also the tvs will have kinds on them.
-\end{code}
+rnDeprecs :: GlobalRdrEnv -> Maybe DeprecTxt
+ -> [RdrNameDeprecation] -> RnMG Deprecations
+rnDeprecs gbl_env Nothing []
+ = returnRn NoDeprecs
+rnDeprecs gbl_env (Just txt) decls
+ = mapRn (addErrRn . badDeprec) decls `thenRn_`
+ returnRn (DeprecAll txt)
-%*********************************************************
-%* *
-\subsection{Extracting the `gates'}
-%* *
-%*********************************************************
+rnDeprecs gbl_env Nothing decls
+ = mapRn rn_deprec decls `thenRn` \ pairs ->
+ returnRn (DeprecSome (mkNameEnv (catMaybes pairs)))
+ where
+ rn_deprec (Deprecation rdr_name txt loc)
+ = pushSrcLocRn loc $
+ lookupGlobalRn gbl_env rdr_name `thenRn` \ maybe_name ->
+ case maybe_name of
+ Just n -> returnRn (Just (n,txt))
+ Nothing -> returnRn Nothing
+\end{code}
-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.
+%************************************************************************
+%* *
+\subsection{Grabbing the old interface file and checking versions}
+%* *
+%************************************************************************
\begin{code}
-getGates source_fvs (SigD (IfaceSig _ ty _ _))
- = extractHsTyNames ty
-
-getGates source_fvs (TyClD (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 (TyClD (TySynonym tycon tvs ty _))
- = delListFromNameSet (extractHsTyNames ty)
- (hsTyVarNames tvs)
- -- A type synonym type constructor isn't a "gate" for instance decls
-
-getGates source_fvs (TyClD (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
+checkOldIface :: DynFlags -> Finder
+ -> HomeIfaceTable -> HomeSymbolTable
+ -> PersistentCompilerState
+ -> Module
+ -> Bool -- Source unchanged
+ -> Maybe ModIface -- Old interface from compilation manager, if any
+ -> 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 $
- 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_details (NewCon t _) = extractHsTyNames t
+ -- Load the old interface file, if we havn't already got it
+ loadOldIface mod maybe_iface `thenRn` \ maybe_iface ->
- get_field (fs,t) | any (`elemNameSet` source_fvs) fs = get_bang t
- | otherwise = emptyFVs
+ -- Check versions
+ recompileRequired mod source_unchanged maybe_iface `thenRn` \ recompile ->
- get_bang bty = extractHsTyNames (getBangType bty)
-
-getGates source_fvs other_decl = emptyFVs
+ returnRn (recompile, maybe_iface)
\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
- | is_id = getWiredInGates_s (namesOfType (idType the_id))
- | isSynTyCon the_tycon = getWiredInGates_s
- (delListFromNameSet (namesOfType ty) (map getName tyvars))
- | otherwise = unitFV name
- where
- maybe_wired_in_id = maybeWiredInIdName name
- is_id = maybeToBool maybe_wired_in_id
- maybe_wired_in_tycon = maybeWiredInTyConName name
- Just the_id = maybe_wired_in_id
- Just the_tycon = maybe_wired_in_tycon
- (tyvars,ty) = getSynTyConDefn the_tycon
-
-getWiredInGates_s names = foldr (plusFV . getWiredInGates) emptyFVs (nameSetToList names)
-\end{code}
+loadOldIface :: Module -> Maybe ModIface -> RnMG (Maybe ModIface)
+loadOldIface mod (Just iface)
+ = returnRn (Just iface)
+
+loadOldIface mod Nothing
+ = -- LOAD THE OLD INTERFACE FILE
+ findAndReadIface doc_str (moduleName mod) False {- Not hi-boot -} `thenRn` \ read_result ->
+ case read_result of {
+ Left err -> -- Old interface file not found, or garbled, so we'd better bail out
+ traceRn (vcat [ptext SLIT("No old interface file:"), err]) `thenRn_`
+ returnRn Nothing ;
+
+ Right (_, iface) ->
+
+ -- RENAME IT
+ initIfaceRnMS mod (
+ loadHomeDecls (pi_decls iface) `thenRn` \ decls ->
+ loadHomeRules (pi_rules iface) `thenRn` \ rules ->
+ loadHomeInsts (pi_insts iface) `thenRn` \ insts ->
+ returnRn (decls, rules, insts)
+ ) `thenRn` \ ((decls_vers, new_decls), (rule_vers, new_rules), new_insts) ->
+
+ mapRn loadHomeUsage (pi_usages iface) `thenRn` \ usages ->
+ loadExports (pi_exports iface) `thenRn` \ (export_vers, avails) ->
+ loadFixDecls mod (pi_fixity iface) `thenRn` \ fix_env ->
+ loadDeprecs mod (pi_deprecs iface) `thenRn` \ deprec_env ->
+ let
+ version = VersionInfo { vers_module = pi_vers iface,
+ vers_exports = export_vers,
+ vers_rules = rule_vers,
+ vers_decls = decls_vers }
+
+ decls = IfaceDecls { dcl_tycl = new_decls,
+ dcl_rules = new_rules,
+ dcl_insts = new_insts }
+
+ mod_iface = ModIface { mi_module = mod, mi_version = version,
+ mi_exports = avails, mi_orphan = pi_orphan iface,
+ mi_fixities = fix_env, mi_deprecs = deprec_env,
+ mi_usages = usages,
+ mi_decls = decls,
+ mi_globals = panic "No mi_globals in old interface"
+ }
+ in
+ returnRn (Just mod_iface)
+ }
-\begin{code}
-getInstDeclGates (InstD (InstDecl inst_ty _ _ _ _)) = extractHsTyNames inst_ty
-getInstDeclGates other = emptyFVs
+
+ where
+ doc_str = ptext SLIT("need usage info from") <+> ppr mod
\end{code}
-
-%*********************************************************
-%* *
-\subsection{Fixities}
-%* *
-%*********************************************************
-
\begin{code}
-fixitiesFromLocalDecls :: GlobalRdrEnv -> [RdrNameHsDecl] -> RnMG FixityEnv
-fixitiesFromLocalDecls gbl_env decls
- = foldlRn getFixities emptyNameEnv decls `thenRn` \ env ->
- traceRn (text "fixity env" <+> vcat (map ppr (nameEnvElts env))) `thenRn_`
- returnRn env
+loadHomeDecls :: [(Version, RdrNameTyClDecl)]
+ -> RnMS (NameEnv Version, [RenamedTyClDecl])
+loadHomeDecls decls = foldlRn loadHomeDecl (emptyNameEnv, []) decls
+
+loadHomeDecl :: (NameEnv Version, [RenamedTyClDecl])
+ -> (Version, RdrNameTyClDecl)
+ -> RnMS (NameEnv Version, [RenamedTyClDecl])
+loadHomeDecl (version_map, decls) (version, decl)
+ = rnTyClDecl decl `thenRn` \ decl' ->
+ returnRn (extendNameEnv version_map (tyClDeclName decl') version, decl':decls)
+
+------------------
+loadHomeRules :: (Version, [RdrNameRuleDecl])
+ -> RnMS (Version, [RenamedRuleDecl])
+loadHomeRules (version, rules)
+ = mapRn rnIfaceRuleDecl rules `thenRn` \ rules' ->
+ returnRn (version, rules')
+
+------------------
+loadHomeInsts :: [RdrNameInstDecl]
+ -> RnMS [RenamedInstDecl]
+loadHomeInsts insts = mapRn rnInstDecl insts
+
+------------------
+loadHomeUsage :: ImportVersion OccName
+ -> RnMG (ImportVersion Name)
+loadHomeUsage (mod_name, orphans, is_boot, whats_imported)
+ = rn_imps whats_imported `thenRn` \ whats_imported' ->
+ returnRn (mod_name, orphans, is_boot, whats_imported')
where
- getFixities :: FixityEnv -> RdrNameHsDecl -> RnMG FixityEnv
- getFixities acc (FixD fix)
- = fix_decl acc fix
-
- getFixities acc (TyClD (ClassDecl _ _ _ _ sigs _ _ _ _ _ _ _))
- = foldlRn fix_decl acc [sig | FixSig sig <- sigs]
- -- Get fixities from class decl sigs too.
- getFixities acc other_decl
- = returnRn acc
-
- fix_decl acc sig@(FixitySig rdr_name fixity loc)
- = -- Check for fixity decl for something not declared
- case lookupRdrEnv gbl_env rdr_name of {
- Nothing | opt_WarnUnusedBinds
- -> pushSrcLocRn loc (addWarnRn (unusedFixityDecl rdr_name fixity))
- `thenRn_` returnRn acc
- | otherwise -> returnRn acc ;
-
- Just (name:_) ->
-
- -- Check for duplicate fixity decl
- case lookupNameEnv acc name of {
- Just (FixitySig _ _ loc') -> addErrRn (dupFixityDecl rdr_name loc loc')
- `thenRn_` returnRn acc ;
-
- Nothing -> returnRn (extendNameEnv acc name (FixitySig name fixity loc))
- }}
+ rn_imps NothingAtAll = returnRn NothingAtAll
+ rn_imps (Everything v) = returnRn (Everything v)
+ rn_imps (Specifically mv ev items rv) = mapRn rn_imp items `thenRn` \ items' ->
+ returnRn (Specifically mv ev items' rv)
+ rn_imp (occ,vers) = newGlobalName mod_name occ `thenRn` \ name ->
+ returnRn (name,vers)
\end{code}
+
%*********************************************************
%* *
-\subsection{Deprecations}
+\subsection{Closing up the interface decls}
%* *
%*********************************************************
-For deprecations, all we do is check that the names are in scope.
-It's only imported deprecations, dealt with in RnIfaces, that we
-gather them together.
+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}
-rnDeprecs :: GlobalRdrEnv -> Maybe DeprecTxt
- -> [RdrNameHsDecl] -> RnMG [RdrNameDeprecation]
-rnDeprecs gbl_env mod_deprec decls
- = mapRn rn_deprec deprecs `thenRn_`
- returnRn (extra_deprec ++ deprecs)
- where
- deprecs = [d | DeprecD d <- decls]
- extra_deprec = case mod_deprec of
- Nothing -> []
- Just txt -> [Deprecation (IEModuleContents undefined) txt noSrcLoc]
-
- rn_deprec (Deprecation ie txt loc)
- = pushSrcLocRn loc $
- mapRn check (ieNames ie)
-
- check n = case lookupRdrEnv gbl_env n of
- Nothing -> addErrRn (unknownNameErr n)
- Just _ -> returnRn ()
-\end{code}
+closeIfaceDecls :: DynFlags -> Finder
+ -> HomeIfaceTable -> HomeSymbolTable
+ -> PersistentCompilerState
+ -> ModIface -- Get the decls from here
+ -> IO (PersistentCompilerState, Bool, [RenamedHsDecl])
+ -- True <=> errors happened
+closeIfaceDecls dflags finder hit hst pcs
+ mod_iface@(ModIface { mi_module = mod, mi_decls = iface_decls })
+ = initRn dflags finder 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}
%*********************************************************
%* *
%*********************************************************
\begin{code}
-reportUnusedNames :: ModuleName -> [Module]
+reportUnusedNames :: ModuleName -> [ModuleName]
-> GlobalRdrEnv -> AvailEnv
-> Avails -> NameSet -> [RenamedHsDecl]
-> RnMG ()
gbl_env avail_env
export_avails mentioned_names
imported_decls
- = 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 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))
- defined_but_not_used =
- nameSetToList (defined_names `minusNameSet` really_used_names)
-
- -- Filter out the ones only defined implicitly
- bad_locals = [n | n <- defined_but_not_used, isLocallyDefined n]
- bad_imp_names = [n | n <- defined_but_not_used, isUserImportedExplicitlyName n,
- not (module_unused n)]
-
- deprec_used deprec_env = [ (n,txt)
- | n <- nameSetToList mentioned_names,
- not (isLocallyDefined n),
- Just txt <- [lookupNameEnv deprec_env n] ]
-
- -- inst_mods are directly-imported modules that
- -- contain instance decl(s) that the renamer decided to suck in
- -- It's not necessarily redundant to import such modules.
- --
- -- NOTE: Consider
- -- module This
- -- import M ()
- --
- -- The import M() is not *necessarily* redundant, even if
- -- we suck in no instance decls from M (e.g. it contains
- -- no instance decls, or This contains no code). It may be
- -- that we import M solely to ensure that M's orphan instance
- -- decls (or those in its imports) are visible to people who
- -- import This. Sigh.
- -- There's really no good way to detect this, so the error message
- -- in RnEnv.warnUnusedModules is weakened instead
- inst_mods = [m | InstD (InstDecl _ _ _ (Just dfun) _) <- imported_decls,
- let m = nameModule dfun,
- m `elem` direct_import_mods
- ]
-
- minimal_imports :: FiniteMap Module AvailEnv
- minimal_imports0 = emptyFM
- minimal_imports1 = foldNameSet add_name minimal_imports0 really_used_names
- minimal_imports = foldr add_inst_mod minimal_imports1 inst_mods
-
- add_name n acc = case maybeUserImportedFrom n of
- Nothing -> acc
- Just m -> addToFM_C plusAvailEnv acc m
- (unitAvailEnv (mk_avail n))
- add_inst_mod m acc
- | m `elemFM` acc = acc -- We import something already
- | otherwise = addToFM acc m emptyAvailEnv
- -- Add an empty collection of imports for a module
- -- from which we have sucked only instance decls
-
- mk_avail n = case lookupNameEnv avail_env n of
- Just (AvailTC m _) | n==m -> AvailTC n [n]
- | otherwise -> AvailTC m [n,m]
- Just avail -> Avail n
- Nothing -> pprPanic "mk_avail" (ppr n)
-
- -- unused_imp_mods are the directly-imported modules
- -- that are not mentioned in minimal_imports
- unused_imp_mods = [m | m <- direct_import_mods,
- not (maybeToBool (lookupFM minimal_imports m))]
-
- module_unused :: Name -> Bool
- -- Name is imported from a module that's completely unused,
- -- so don't report stuff about the name (the module covers it)
- module_unused n = expectJust "module_unused" (maybeUserImportedFrom n)
- `elem` unused_imp_mods
- -- module_unused is only called if it's user-imported
- in
- warnUnusedModules unused_imp_mods `thenRn_`
+ = warnUnusedModules unused_imp_mods `thenRn_`
warnUnusedLocalBinds bad_locals `thenRn_`
warnUnusedImports bad_imp_names `thenRn_`
printMinimalImports mod_name minimal_imports `thenRn_`
- getIfacesRn `thenRn` \ ifaces ->
- (if opt_WarnDeprecations
- then mapRn_ warnDeprec (deprec_used (iDeprecs ifaces))
- else returnRn ())
+ warnDeprecations really_used_names `thenRn_`
+ returnRn ()
+
+ where
+ 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 [ parent_name
+ | sub_name <- nameSetToList used_names
+
+ -- 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. Also, (-x) gives rise to an implicit use of 'negate';
+ -- similarly, 3.5 gives rise to an implcit use of :%
+ -- Hence the silent 'False' in all other cases
+
+ , Just parent_name <- [case lookupNameEnv avail_env sub_name of
+ Just (AvailTC n _) -> Just n
+ other -> Nothing]
+ ]
+
+ defined_names, defined_and_used, defined_but_not_used :: [(Name,Provenance)]
+ defined_names = concat (rdrEnvElts gbl_env)
+ (defined_and_used, defined_but_not_used) = partition used defined_names
+ used (name,_) = not (name `elemNameSet` really_used_names)
+
+ -- Filter out the ones only defined implicitly
+ bad_locals :: [Name]
+ bad_locals = [n | (n,LocalDef) <- defined_but_not_used]
+
+ bad_imp_names :: [(Name,Provenance)]
+ bad_imp_names = [(n,p) | (n,p@(NonLocalDef (UserImport mod _ True) _)) <- defined_but_not_used,
+ not (module_unused mod)]
+
+ -- inst_mods are directly-imported modules that
+ -- contain instance decl(s) that the renamer decided to suck in
+ -- It's not necessarily redundant to import such modules.
+ --
+ -- NOTE: Consider
+ -- module This
+ -- import M ()
+ --
+ -- The import M() is not *necessarily* redundant, even if
+ -- we suck in no instance decls from M (e.g. it contains
+ -- no instance decls, or This contains no code). It may be
+ -- that we import M solely to ensure that M's orphan instance
+ -- decls (or those in its imports) are visible to people who
+ -- import This. Sigh.
+ -- There's really no good way to detect this, so the error message
+ -- in RnEnv.warnUnusedModules is weakened instead
+ inst_mods :: [ModuleName]
+ inst_mods = [m | InstD (InstDecl _ _ _ (Just dfun) _) <- imported_decls,
+ let m = moduleName (nameModule dfun),
+ m `elem` direct_import_mods
+ ]
+
+ -- To figure out the minimal set of imports, start with the things
+ -- that are in scope (i.e. in gbl_env). Then just combine them
+ -- into a bunch of avails, so they are properly grouped
+ minimal_imports :: FiniteMap ModuleName AvailEnv
+ minimal_imports0 = emptyFM
+ minimal_imports1 = foldr add_name minimal_imports0 defined_and_used
+ minimal_imports = foldr add_inst_mod minimal_imports1 inst_mods
+
+ add_name (n,NonLocalDef (UserImport m _ _) _) acc = addToFM_C plusAvailEnv acc (moduleName (nameModule n))
+ (unitAvailEnv (mk_avail n))
+ add_name (n,other_prov) acc = acc
+
+ mk_avail n = case lookupNameEnv avail_env n of
+ Just (AvailTC m _) | n==m -> AvailTC n [n]
+ | otherwise -> AvailTC m [n,m]
+ Just avail -> Avail n
+ Nothing -> pprPanic "mk_avail" (ppr n)
+
+ add_inst_mod m acc
+ | m `elemFM` acc = acc -- We import something already
+ | otherwise = addToFM acc m emptyAvailEnv
+ -- Add an empty collection of imports for a module
+ -- from which we have sucked only instance decls
+
+ -- unused_imp_mods are the directly-imported modules
+ -- that are not mentioned in minimal_imports
+ unused_imp_mods = [m | m <- direct_import_mods,
+ not (maybeToBool (lookupFM minimal_imports m)),
+ m /= pRELUDE_Name]
+
+ module_unused :: Module -> Bool
+ module_unused mod = moduleName mod `elem` unused_imp_mods
+
+
+warnDeprecations used_names
+ = doptRn Opt_WarnDeprecations `thenRn` \ warn_drs ->
+ if not warn_drs then returnRn () else
+
+ getIfacesRn `thenRn` \ ifaces ->
+ getHomeIfaceTableRn `thenRn` \ hit ->
+ let
+ pit = iPIT ifaces
+ deprecs = [ (n,txt)
+ | n <- nameSetToList used_names,
+ Just txt <- [lookup_deprec hit pit n] ]
+ in
+ 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
-- ToDo: deal with original imports with 'qualified' and 'as M' clauses
printMinimalImports mod_name imps
- | not opt_D_dump_minimal_imports
- = returnRn ()
- | otherwise
- = mapRn to_ies (fmToList imps) `thenRn` \ mod_ies ->
+ = doptRn Opt_D_dump_minimal_imports `thenRn` \ dump_minimal ->
+ if not dump_minimal then returnRn () else
+
+ mapRn to_ies (fmToList imps) `thenRn` \ mod_ies ->
ioToRnM (do { h <- openFile filename WriteMode ;
printForUser h (vcat (map ppr_mod_ie mod_ies))
}) `thenRn_`
parens (fsep (punctuate comma (map ppr ies)))
to_ies (mod, avail_env) = mapRn to_ie (availEnvElts avail_env) `thenRn` \ ies ->
- returnRn (moduleName mod, ies)
+ returnRn (mod, ies)
to_ie :: AvailInfo -> RnMG (IE Name)
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
- | opt_D_dump_rn_trace ||
- opt_D_dump_rn_stats ||
- opt_D_dump_rn
- = getRnStats imp_decls `thenRn` \ stats_msg ->
+ = 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 ->
- returnRn (printErrs stats_msg >>
- dumpIfSet opt_D_dump_rn "Renamer:"
- (vcat (map ppr (local_decls ++ imp_decls))))
+ ioToRnM (do { dumpIfSet (dump_rn_trace || dump_rn_stats || dump_rn)
+ "Renamer statistics"
+ (getRnStats imp_decls ifaces) ;
- | otherwise = returnRn (return ())
+ 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 [() | (_, _, Just _) <- 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, _) = count_decls 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 | TyClD d <- decls_read, isClassDecl d])]
- in
- returnRn (hcat [text "Renamer stats: ", stats])
+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])]
count_decls decls
= (class_decls,
inst_decls)
where
tycl_decls = [d | TyClD d <- decls]
- (class_decls, data_decls, newtype_decls, syn_decls) = countTyClDecls tycl_decls
+ (class_decls, data_decls, newtype_decls, syn_decls, val_decls) = countTyClDecls tycl_decls
- val_decls = length [() | SigD _ <- decls]
inst_decls = length [() | InstD _ <- decls]
\end{code}
= vcat [ptext SLIT("Multiple fixity declarations for") <+> quotes (ppr rdr_name),
ptext SLIT("at ") <+> ppr loc1,
ptext SLIT("and") <+> ppr loc2]
+
+badDeprec d
+ = sep [ptext SLIT("Illegal deprecation when whole module is deprecated"),
+ nest 4 (ppr d)]
\end{code}
+
+