\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(..),
- RecompileRequired, recompileRequired
+import RnSource ( rnSourceDecls, rnTyClDecl, rnIfaceRuleDecl, rnInstDecl )
+import RnIfaces ( slurpImpDecls, mkImportInfo,
+ getInterfaceExports, closeDecls,
+ RecompileRequired, outOfDate, recompileRequired
)
-import RnHiFiles ( findAndReadIface, removeContext, loadExports, loadFixDecls, loadDeprecs )
-import RnEnv ( availName, availsToNameSet,
- emptyAvailEnv, unitAvailEnv, availEnvElts, plusAvailEnv, sortAvails,
+import RnHiFiles ( readIface, removeContext, loadInterface,
+ loadExports, loadFixDecls, loadDeprecs )
+import RnEnv ( availsToNameSet, availName,
+ emptyAvailEnv, unitAvailEnv, availEnvElts, plusAvailEnv, groupAvails,
warnUnusedImports, warnUnusedLocalBinds, warnUnusedModules,
- lookupOrigNames, lookupGlobalRn, newGlobalName,
- FreeVars, plusFVs, plusFV, unitFV, emptyFVs, isEmptyFVs, addOneFV
+ lookupOrigNames, lookupSrcName, newGlobalName, unQualInScope
)
import Module ( Module, ModuleName, WhereFrom(..),
- moduleNameUserString, moduleName,
- lookupModuleEnv
+ moduleNameUserString, moduleName,
+ moduleEnvElts
)
-import Name ( Name, isLocallyDefined, NamedThing(..), getSrcLoc,
- nameOccName, nameUnique, nameModule,
- mkNameEnv, nameEnvElts, extendNameEnv
+import Name ( Name, NamedThing(..), getSrcLoc,
+ nameIsLocalOrFrom, nameOccName, nameModule,
)
+import Name ( mkNameEnv, nameEnvElts, extendNameEnv )
+import RdrName ( elemRdrEnv, foldRdrEnv, isQual )
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_Unqual,
unpackCString_RDR, unpackCStringFoldr_RDR, unpackCStringUtf8_RDR,
eqString_RDR
)
-import PrelInfo ( fractionalClassKeys, derivingOccurrences, wiredInThingEnv )
-import Type ( namesOfType, funTyCon )
-import ErrUtils ( dumpIfSet )
+import PrelInfo ( derivingOccurrences )
+import Type ( funTyCon )
+import ErrUtils ( dumpIfSet, showPass, printErrorsAndWarnings, errorsFound )
import Bag ( bagToList )
-import FiniteMap ( FiniteMap, eltsFM, fmToList, emptyFM, lookupFM,
+import FiniteMap ( FiniteMap, fmToList, emptyFM, lookupFM,
addToFM_C, elemFM, addToFM
)
import UniqFM ( lookupUFM )
import Maybes ( maybeToBool, catMaybes )
import Outputable
import IO ( openFile, IOMode(..) )
-import HscTypes ( Finder, PersistentCompilerState, HomeIfaceTable, HomeSymbolTable,
- ModIface(..), TyThing(..), WhatsImported(..),
- VersionInfo(..), ImportVersion, IfaceDecls(..),
- GlobalRdrEnv, AvailEnv, Avails, GenAvailInfo(..), AvailInfo,
+import HscTypes ( PersistentCompilerState, HomeIfaceTable, HomeSymbolTable,
+ ModIface(..), WhatsImported(..),
+ VersionInfo(..), ImportVersion,
+ IfaceDecls, mkIfaceDecls, dcl_tycl, dcl_rules, dcl_insts,
+ GlobalRdrEnv, pprGlobalRdrEnv,
+ AvailEnv, GenAvailInfo(..), AvailInfo, Avails,
Provenance(..), ImportReason(..), initialVersionInfo,
- Deprecations(..), lookupDeprec
+ Deprecations(..), lookupDeprec, lookupIface
)
import List ( partition, nub )
\end{code}
%*********************************************************
\begin{code}
-renameModule :: DynFlags -> Finder
+renameModule :: DynFlags
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
-> Module -> RdrNameHsModule
- -> IO (PersistentCompilerState, Maybe (ModIface, [RenamedHsDecl]))
+ -> IO (PersistentCompilerState, Maybe (PrintUnqualified, 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 {
- (new_pcs, errors_found, (maybe_rn_stuff, dump_action))
- <- initRn dflags finder hit hst old_pcs this_module (rename this_module rdr_module) ;
+renameModule dflags hit hst old_pcs this_module rdr_module
+ = do { showPass dflags "Renamer"
- -- Dump any debugging output
- dump_action ;
+ -- Initialise the renamer monad
+ ; (new_pcs, msgs, 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
+ ; let print_unqualified :: Name -> Bool -- Is this chap in scope unqualified?
+ print_unqualified = case maybe_rn_stuff of
+ Just (unqual, _, _) -> unqual
+ Nothing -> alwaysQualify
+
+
+ -- Print errors from renaming
+ ; printErrorsAndWarnings print_unqualified msgs ;
+
+ -- Return results. No harm in updating the PCS
+ ; if errorsFound msgs then
return (new_pcs, Nothing)
- else
+ else
return (new_pcs, maybe_rn_stuff)
}
\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 ->
+rename :: Module -> RdrNameHsModule -> RnMG (Maybe (PrintUnqualified, ModIface, [RenamedHsDecl]))
+rename this_module contents@(HsModule _ _ _ imports local_decls mod_deprec loc)
+ = pushSrcLocRn loc $
- -- 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) ;
+ -- FIND THE GLOBAL NAME ENVIRONMENT
+ getGlobalNames this_module contents `thenRn` \ (gbl_env, local_gbl_env,
+ export_avails, global_avail_env) ->
- Just (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
+
+ traceRn (text "Local top-level environment" $$
+ nest 4 (pprGlobalRdrEnv local_gbl_env)) `thenRn_`
-- DEAL WITH DEPRECATIONS
rnDeprecs local_gbl_env mod_deprec
fixitiesFromLocalDecls local_gbl_env local_decls `thenRn` \ local_fixity_env ->
-- RENAME THE SOURCE
- initRnMS gbl_env local_fixity_env SourceMode (
- rnSourceDecls local_decls
- ) `thenRn` \ (rn_local_decls, source_fvs) ->
+ rnSourceDecls gbl_env local_fixity_env 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
- -- 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.
- -- We only need the 'parent name' of the avail;
- -- that's enough to suck in the declaration.
- export_fvs = mkNameSet (map availName export_avails)
- real_source_fvs = source_fvs `plusFV` export_fvs
-
- slurp_fvs = implicit_fvs `plusFV` real_source_fvs
+ slurp_fvs = implicit_fvs `plusFV` source_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.
in
+ traceRn (text "Source FVs:" <+> fsep (map ppr (nameSetToList slurp_fvs))) `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
- mkImportInfo mod_name imports `thenRn` \ my_usages ->
+ mkImportInfo mod_name imports `thenRn` \ my_usages ->
- -- RETURN THE RENAMED MODULE
- getNameSupplyRn `thenRn` \ name_supply ->
- getIfacesRn `thenRn` \ ifaces ->
+ -- BUILD THE MODULE INTERFACE
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)
| FixitySig name fixity loc <- nameEnvElts local_fixity_env
]
-
-- Sort the exports to make them easier to compare for versions
- my_exports = sortAvails export_avails
+ my_exports = groupAvails this_module export_avails
+ final_decls = rn_local_decls ++ rn_imp_decls
+ is_orphan = any (isOrphanDecl this_module) rn_local_decls
+
mod_iface = ModIface { mi_module = this_module,
mi_version = initialVersionInfo,
- mi_orphan = any isOrphanDecl rn_local_decls,
+ mi_usages = my_usages,
+ mi_boot = False,
+ mi_orphan = is_orphan,
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
+ print_unqualified = unQualInScope gbl_env
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 print_unqualified
+ imports global_avail_env
+ source_fvs export_avails rn_imp_decls `thenRn_`
- returnRn (Just (mod_iface, final_decls), dump_action) }
+ returnRn (Just (print_unqualified, 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_Unqual `elemRdrEnv` local_env) noMainErr
+ | otherwise
+ = returnRn ()
\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, unpackCStringFoldr_RDR, unpackCStringUtf8_RDR,
- eqString_RDR]
+ string_occs = [unpackCString_RDR, unpackCStringFoldr_RDR,
+ unpackCStringUtf8_RDR, eqString_RDR]
get (TyClD (TyData _ _ _ _ _ _ (Just deriv_classes) _ _ _))
= concat (map get_deriv deriv_classes)
\end{code}
\begin{code}
-isOrphanDecl (InstD (InstDecl inst_ty _ _ _ _))
- = not (foldNameSet ((||) . isLocallyDefined) False (extractHsTyNames (removeContext inst_ty)))
+isOrphanDecl this_mod (InstD (InstDecl inst_ty _ _ _ _))
+ = not (foldNameSet ((||) . nameIsLocalOrFrom this_mod) False
+ (extractHsTyNames (removeContext inst_ty)))
-- The 'removeContext' is because of
-- instance Foo a => Baz T where ...
-- The decl is an orphan if Baz and T are both not locally defined,
-- even if Foo *is* locally defined
-isOrphanDecl (RuleD (HsRule _ _ _ lhs _ _))
+isOrphanDecl this_mod (RuleD (HsRule _ _ _ lhs _ _))
= check lhs
where
-- 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 (HsVar v) = not (nameIsLocalOrFrom this_mod v)
check (HsApp f a) = check f && check a
check (HsLit _) = False
check (HsOverLit _) = False
check other = True -- Safe fall through
-isOrphanDecl other = False
-\end{code}
-
-
-%*********************************************************
-%* *
-\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
+isOrphanDecl _ _ = False
\end{code}
\begin{code}
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_`
+ = foldlRn getFixities emptyNameEnv decls `thenRn` \ env ->
+ traceRn (text "fixity env" <+> vcat (map ppr (nameEnvElts env))) `thenRn_`
returnRn env
where
- getFixities :: Bool -> LocalFixityEnv -> RdrNameHsDecl -> RnMG LocalFixityEnv
- getFixities warn_uu acc (FixD fix)
- = fix_decl warn_uu acc fix
+ getFixities :: LocalFixityEnv -> RdrNameHsDecl -> RnMG LocalFixityEnv
+ getFixities acc (FixD fix)
+ = fix_decl acc fix
- getFixities warn_uu acc (TyClD (ClassDecl _ _ _ _ sigs _ _ _ ))
- = foldlRn (fix_decl warn_uu) acc [sig | FixSig sig <- sigs]
+ getFixities acc (TyClD (ClassDecl _ _ _ _ sigs _ _ _ ))
+ = foldlRn fix_decl acc [sig | FixSig sig <- sigs]
-- Get fixities from class decl sigs too.
- getFixities warn_uu acc other_decl
+ getFixities acc other_decl
= returnRn acc
- fix_decl warn_uu acc sig@(FixitySig rdr_name fixity loc)
+ fix_decl 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 ->
+ lookupSrcName gbl_env rdr_name `thenRn` \ name ->
-- Check for duplicate fixity decl
- case lookupNameEnv acc name of {
- Just (FixitySig _ _ loc') -> addErrRn (dupFixityDecl rdr_name loc loc')
- `thenRn_` returnRn acc ;
+ 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))
- }}
+ Nothing -> returnRn (extendNameEnv acc name (FixitySig name fixity loc))
\end{code}
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
+ = pushSrcLocRn loc $
+ lookupSrcName gbl_env rdr_name `thenRn` \ name ->
+ returnRn (Just (name, (name,txt)))
\end{code}
%************************************************************************
\begin{code}
-checkOldIface :: DynFlags -> Finder
+checkOldIface :: DynFlags
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
- -> Module
+ -> FilePath
-> 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 $
-
- -- Load the old interface file, if we havn't already got it
- loadOldIface mod maybe_iface `thenRn` \ maybe_iface ->
-
- -- Check versions
- recompileRequired mod source_unchanged maybe_iface `thenRn` \ recompile ->
-
- returnRn (recompile, maybe_iface)
+checkOldIface dflags hit hst pcs iface_path source_unchanged maybe_iface
+ = runRn dflags hit hst pcs (panic "Bogus module") $
+ case maybe_iface of
+ Just old_iface -> -- Use the one we already have
+ setModuleRn (mi_module old_iface) (check_versions old_iface)
+
+ Nothing -- try and read it from a file
+ -> readIface iface_path `thenRn` \ read_result ->
+ case read_result of
+ Left err -> -- Old interface file not found, or garbled; give up
+ traceRn (text "Bad old interface file" $$ nest 4 err) `thenRn_`
+ returnRn (outOfDate, Nothing)
+
+ Right parsed_iface
+ -> setModuleRn (pi_mod parsed_iface) $
+ loadOldIface parsed_iface `thenRn` \ m_iface ->
+ check_versions m_iface
+ where
+ check_versions :: ModIface -> RnMG (RecompileRequired, Maybe ModIface)
+ check_versions iface
+ = -- Check versions
+ recompileRequired iface_path source_unchanged iface
+ `thenRn` \ recompile ->
+ returnRn (recompile, Just iface)
\end{code}
+I think the following function should now have a more representative name,
+but what?
\begin{code}
-loadOldIface :: Module -> Maybe ModIface -> RnMG (Maybe ModIface)
-loadOldIface mod (Just iface)
- = returnRn (Just iface)
+loadOldIface :: ParsedIface -> RnMG ModIface
-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
+loadOldIface parsed_iface
+ = let iface = parsed_iface
+ mod = pi_mod iface
+ in
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) ->
+ )
+ `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) ->
+ 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
vers_rules = rule_vers,
vers_decls = decls_vers }
- decls = IfaceDecls { dcl_tycl = new_decls,
- dcl_rules = new_rules,
- dcl_insts = new_insts }
+ decls = mkIfaceDecls new_decls new_rules new_insts
mod_iface = ModIface { mi_module = mod, mi_version = version,
- mi_exports = avails, mi_orphan = pi_orphan iface,
+ mi_exports = avails, mi_usages = usages,
+ mi_boot = False, 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)
- }
-
-
- where
- doc_str = ptext SLIT("need usage info from") <+> ppr mod
+ returnRn mod_iface
\end{code}
\begin{code}
-> (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 })
+ = runRn 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 -> PrintUnqualified
+ -> [RdrNameImportDecl]
+ -> AvailEnv
+ -> NameSet -- Used in this module
+ -> Avails -- Exported by this module
+ -> [RenamedHsDecl]
-> RnMG ()
-reportUnusedNames mod_name direct_import_mods
- gbl_env avail_env
- export_avails mentioned_names
- imported_decls
+reportUnusedNames my_mod_iface unqual imports avail_env
+ source_fvs export_avails 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_`
- returnRn ()
+ printMinimalImports this_mod unqual minimal_imports `thenRn_`
+ warnDeprecations this_mod export_avails my_deprecs
+ really_used_names
where
- used_names = mentioned_names `unionNameSets` availsToNameSet export_avails
+ this_mod = mi_module my_mod_iface
+ gbl_env = mi_globals my_mod_iface
+ my_deprecs = mi_deprecs my_mod_iface
+ -- The export_fvs make the exported names look just as if they
+ -- occurred in the source program.
+ export_fvs = availsToNameSet export_avails
+ used_names = source_fvs `plusFV` export_fvs
+
-- 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`
other -> Nothing]
]
- defined_names, defined_and_used, defined_but_not_used :: [(Name,Provenance)]
- defined_names = concat (rdrEnvElts gbl_env)
+ -- Collect the defined names from the in-scope environment
+ -- Look for the qualified ones only, else get duplicates
+ defined_names :: [(Name,Provenance)]
+ defined_names = foldRdrEnv add [] gbl_env
+ add rdr_name ns acc | isQual rdr_name = ns ++ acc
+ | otherwise = acc
+
+ defined_and_used, defined_but_not_used :: [(Name,Provenance)]
(defined_and_used, defined_but_not_used) = partition used defined_names
- used (name,_) = not (name `elemNameSet` really_used_names)
+ used (name,_) = 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,
+ 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
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
+ 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 = 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 :: Module -> Bool
module_unused mod = moduleName mod `elem` unused_imp_mods
-
-warnDeprecations used_names
+warnDeprecations this_mod export_avails my_deprecs used_names
= doptRn Opt_WarnDeprecations `thenRn` \ warn_drs ->
if not warn_drs then returnRn () else
- getIfacesRn `thenRn` \ ifaces ->
- getHomeIfaceTableRn `thenRn` \ hit ->
+ -- The home modules for things in the export list
+ -- may not have been loaded yet; do it now, so
+ -- that we can see their deprecations, if any
+ mapRn_ load_home export_mods `thenRn_`
+
+ getIfacesRn `thenRn` \ ifaces ->
+ getHomeIfaceTableRn `thenRn` \ hit ->
let
pit = iPIT ifaces
deprecs = [ (n,txt)
mapRn_ warnDeprec deprecs
where
+ export_mods = nub [ moduleName (nameModule name)
+ | avail <- export_avails,
+ let name = availName avail,
+ not (nameIsLocalOrFrom this_mod name) ]
+
+ load_home m = loadInterface (text "Check deprecations for" <+> ppr m) m ImportBySystem
+
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
+ | nameIsLocalOrFrom this_mod n
+ = lookupDeprec my_deprecs n
+ | otherwise
+ = case lookupIface hit pit this_mod 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 this_mod unqual imps
= 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))
+ printForUser h unqual (vcat (map ppr_mod_ie mod_ies))
}) `thenRn_`
returnRn ()
where
- filename = moduleNameUserString mod_name ++ ".imports"
+ filename = moduleNameUserString (moduleName this_mod) ++ ".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)
- [d | d <- decls_read, isClassDecl d])]
- in
- returnRn (hcat [text "Renamer stats: ", stats])
-
-count_decls decls
- = (class_decls,
- data_decls,
- newtype_decls,
- syn_decls,
- val_decls,
- inst_decls)
+getRnStats :: [RenamedHsDecl] -> Ifaces -> SDoc
+getRnStats imported_decls ifaces
+ = hcat [text "Renamer stats: ", stats]
where
- tycl_decls = [d | TyClD d <- decls]
- (class_decls, data_decls, newtype_decls, syn_decls, val_decls) = countTyClDecls tycl_decls
+ n_mods = length [() | _ <- moduleEnvElts (iPIT ifaces)]
+ -- This is really only right for a one-shot compile
- inst_decls = length [() | InstD _ <- decls]
+ (decls_map, n_decls_slurped) = iDecls ifaces
+
+ n_decls_left = length [decl | (avail, True, (_,decl)) <- nameEnvElts decls_map
+ -- 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
+ ]
+
+ (insts_left, n_insts_slurped) = iInsts ifaces
+ n_insts_left = length (bagToList insts_left)
+
+ (rules_left, n_rules_slurped) = iRules ifaces
+ n_rules_left = length (bagToList rules_left)
+
+ stats = vcat
+ [int n_mods <+> text "interfaces read",
+ hsep [ int n_decls_slurped, text "type/class/variable imported, out of",
+ int (n_decls_slurped + n_decls_left), text "read"],
+ hsep [ int n_insts_slurped, text "instance decls imported, out of",
+ int (n_insts_slurped + n_insts_left), text "read"],
+ hsep [ int n_rules_slurped, text "rule decls imported, out of",
+ int (n_rules_slurped + n_rules_left), text "read"]
+ ]
\end{code}
text "is deprecated:", nest 4 (ppr txt) ]
-unusedFixityDecl rdr_name fixity
- = hsep [ptext SLIT("Unused fixity declaration for"), quotes (ppr rdr_name)]
-
dupFixityDecl rdr_name loc1 loc2
= vcat [ptext SLIT("Multiple fixity declarations for") <+> quotes (ppr rdr_name),
ptext SLIT("at ") <+> ppr loc1,
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}
projects / ghc-hetmet.git / blobdiff