%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[RnIfaces]{Cacheing and Renaming of Interfaces}
\begin{code}
-#include "HsVersions.h"
-
module RnIfaces (
- getInterfaceExports,
- getImportedInstDecls,
- getSpecialInstModules, getDeferredDataDecls,
+ getInterfaceExports,
+ getImportedInstDecls, getImportedRules,
+ lookupFixity, loadHomeInterface,
importDecl, recordSlurp,
- getImportVersions, getSlurpedNames, getRnStats,
+ getImportVersions, getSlurped,
checkUpToDate,
- getDeclBinders,
- mkSearchPath
+ getDeclBinders
) where
-IMP_Ubiq()
-#if __GLASGOW_HASKELL__ >= 202
-import IO
-#endif
-
+#include "HsVersions.h"
-import CmdLineOpts ( opt_PruneTyDecls, opt_PruneInstDecls, opt_PprUserLength )
-import HsSyn ( HsDecl(..), TyDecl(..), ClassDecl(..), HsTyVar, HsExpr, Sig(..), HsType(..),
- HsBinds(..), MonoBinds, DefaultDecl, ConDecl(..), ConDetails(..), BangType, IfaceSig(..),
- FixityDecl(..), Fixity, Fake, InPat, InstDecl(..), HsIdInfo,
- IE(..), hsDeclName
+import CmdLineOpts ( opt_NoPruneDecls, opt_IgnoreIfacePragmas )
+import HsSyn ( HsDecl(..), TyClDecl(..), InstDecl(..), IfaceSig(..),
+ HsType(..), ConDecl(..), IE(..), ConDetails(..), Sig(..),
+ FixitySig(..), RuleDecl(..),
+ isClassOpSig
)
-import HsPragmas ( noGenPragmas )
-import BasicTypes ( SYN_IE(Version), NewOrData(..) )
-import RdrHsSyn ( SYN_IE(RdrNameHsDecl), SYN_IE(RdrNameInstDecl), SYN_IE(RdrNameTyDecl),
- RdrName, rdrNameOcc
+import BasicTypes ( Version, NewOrData(..), defaultFixity )
+import RdrHsSyn ( RdrNameHsDecl, RdrNameInstDecl, RdrNameTyClDecl, RdrNameRuleDecl,
+ extractHsTyRdrNames
)
-import RnEnv ( newGlobalName, lookupRn, addImplicitOccsRn,
- availName, availNames, addAvailToNameSet, pprAvail
+import RnEnv ( mkImportedGlobalName, newImportedBinder, mkImportedGlobalFromRdrName,
+ lookupOccRn,
+ pprAvail,
+ availName, availNames, addAvailToNameSet,
+ FreeVars, emptyFVs
)
-import RnSource ( rnHsSigType )
import RnMonad
-import RnHsSyn ( SYN_IE(RenamedHsDecl) )
-import ParseIface ( parseIface )
+import RnHsSyn ( RenamedHsDecl )
+import ParseIface ( parseIface, IfaceStuff(..) )
-import ErrUtils ( SYN_IE(Error), SYN_IE(Warning) )
-import FiniteMap ( FiniteMap, sizeFM, emptyFM, unitFM, delFromFM,
+import FiniteMap ( FiniteMap, sizeFM, emptyFM, delFromFM,
lookupFM, addToFM, addToFM_C, addListToFM,
- fmToList, eltsFM
+ fmToList, elemFM, foldFM
)
-import Name ( Name {-instance NamedThing-}, Provenance, OccName(..),
- nameModule, occNameString, moduleString, pprModule, isLocallyDefined,
- NameSet(..), emptyNameSet, unionNameSets, nameSetToList,
- minusNameSet, mkNameSet, elemNameSet, nameUnique, addOneToNameSet,
- isWiredInName, maybeWiredInTyConName, maybeWiredInIdName,
- NamedThing(..)
+import Name ( Name {-instance NamedThing-},
+ nameModule, isLocallyDefined,
+ isWiredInName, nameUnique, NamedThing(..)
)
-import Id ( GenId, Id(..), idType, dataConTyCon, isAlgCon )
-import TyCon ( TyCon, tyConDataCons, isSynTyCon, getSynTyConDefn )
-import Type ( namesOfType )
-import TyVar ( GenTyVar )
-import SrcLoc ( mkIfaceSrcLoc, SrcLoc )
-import PrelMods ( gHC__ )
-import PrelInfo ( cCallishTyKeys )
+import Module ( Module, moduleString, pprModule,
+ mkVanillaModule, pprModuleName,
+ moduleUserString, moduleName, isLibModule,
+ ModuleName, WhereFrom(..),
+ )
+import RdrName ( RdrName, rdrNameOcc )
+import NameSet
+import Var ( Id )
+import SrcLoc ( mkSrcLoc, SrcLoc )
+import PrelMods ( pREL_GHC )
+import PrelInfo ( cCallishTyKeys, thinAirModules )
import Bag
-import Maybes ( MaybeErr(..), expectJust, maybeToBool )
+import Maybes ( MaybeErr(..), maybeToBool, orElse )
import ListSetOps ( unionLists )
-import Pretty
-import Outputable ( PprStyle(..) )
+import Outputable
import Unique ( Unique )
-import Util ( pprPanic, pprTrace, Ord3(..) )
-import StringBuffer ( StringBuffer, hGetStringBuffer, freeStringBuffer )
+import StringBuffer ( StringBuffer, hGetStringBuffer )
+import FastString ( mkFastString )
+import Lex
import Outputable
-#if __GLASGOW_HASKELL__ >= 202
-import List (nub)
-#endif
-\end{code}
-
+import IO ( isDoesNotExistError )
+import List ( nub )
+\end{code}
-%*********************************************************
-%* *
-\subsection{Statistics}
-%* *
-%*********************************************************
-
-\begin{code}
-getRnStats :: [RenamedHsDecl] -> RnMG Doc
-getRnStats all_decls
- = getIfacesRn `thenRn` \ ifaces ->
- let
- Ifaces this_mod mod_vers_map export_envs decls_fm all_names imp_names (unslurped_insts,_) deferred_data_decls inst_mods = ifaces
- n_mods = sizeFM mod_vers_map
-
- decls_imported = filter is_imported_decl all_decls
- decls_read = [decl | (name, (_, avail, decl)) <- fmToList decls_fm,
- name == availName avail,
- -- Data, newtype, and class decls are in the decls_fm
- -- under multiple names; the tycon/class, and each
- -- constructor/class op too.
- not (isLocallyDefined name)
- ]
-
- (cd_rd, dd_rd, add_rd, nd_rd, and_rd, sd_rd, vd_rd, _) = count_decls decls_read
- (cd_sp, dd_sp, add_sp, nd_sp, and_sp, sd_sp, vd_sp, id_sp) = count_decls decls_imported
-
- 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 (of which", int add_sp, text "abstractly), out of",
- int dd_rd, text "read"],
- hsep [int nd_sp, text "newtype decls imported (of which", int and_sp, text "abstractly), 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"]
- ]
- in
- returnRn (hcat [text "Renamer stats: ", stats])
-
-is_imported_decl (DefD _) = False
-is_imported_decl (ValD _) = False
-is_imported_decl decl = not (isLocallyDefined (hsDeclName decl))
-
-count_decls decls
- = -- pprTrace "count_decls" (ppr PprDebug decls
- --
- -- $$
- -- text "========="
- -- $$
- -- ppr PprDebug imported_decls
- -- ) $
- (class_decls,
- data_decls, abstract_data_decls,
- newtype_decls, abstract_newtype_decls,
- syn_decls,
- val_decls,
- inst_decls)
- where
- class_decls = length [() | ClD _ <- decls]
- data_decls = length [() | TyD (TyData DataType _ _ _ _ _ _ _) <- decls]
- newtype_decls = length [() | TyD (TyData NewType _ _ _ _ _ _ _) <- decls]
- abstract_data_decls = length [() | TyD (TyData DataType _ _ _ [] _ _ _) <- decls]
- abstract_newtype_decls = length [() | TyD (TyData NewType _ _ _ [] _ _ _) <- decls]
- syn_decls = length [() | TyD (TySynonym _ _ _ _) <- decls]
- val_decls = length [() | SigD _ <- decls]
- inst_decls = length [() | InstD _ <- decls]
-
-\end{code}
%*********************************************************
%* *
%*********************************************************
\begin{code}
-loadInterface :: Doc -> Module -> RnMG Ifaces
-loadInterface doc_str load_mod
- = getIfacesRn `thenRn` \ ifaces ->
- let
- Ifaces this_mod mod_vers_map export_envs decls all_names imp_names (insts, tycls_names) deferred_data_decls inst_mods = ifaces
- in
+loadHomeInterface :: SDoc -> Name -> RnM d (Module, Ifaces)
+loadHomeInterface doc_str name
+ = loadInterface doc_str (moduleName (nameModule name)) ImportBySystem
+
+loadInterface :: SDoc -> ModuleName -> WhereFrom -> RnM d (Module, Ifaces)
+loadInterface doc_str mod_name from
+ = getIfacesRn `thenRn` \ ifaces ->
+ let
+ mod_map = iImpModInfo ifaces
+ mod_info = lookupFM mod_map mod_name
+ in_map = maybeToBool mod_info
+ in
+
+ -- Issue a warning for a redundant {- SOURCE -} import
+ -- It's redundant if the moduld is in the iImpModInfo at all,
+ -- because we arrange to read all the ordinary imports before
+ -- any of the {- SOURCE -} imports
+ warnCheckRn (not (in_map && case from of {ImportByUserSource -> True; other -> False}))
+ (warnRedundantSourceImport mod_name) `thenRn_`
+
-- CHECK WHETHER WE HAVE IT ALREADY
- if maybeToBool (lookupFM export_envs load_mod)
- then
- returnRn ifaces -- Already in the cache; don't re-read it
- else
+ case mod_info of {
+ Just (_, _, Just (load_mod, _, _))
+ -> -- We're read it already so don't re-read it
+ returnRn (load_mod, ifaces) ;
+
+ mod_map_result ->
-- READ THE MODULE IN
- findAndReadIface doc_str load_mod `thenRn` \ read_result ->
- case read_result of {
- -- Check for not found
+ findAndReadIface doc_str mod_name from in_map `thenRn` \ (hi_boot_read, read_result) ->
+ case read_result of {
Nothing -> -- Not found, so add an empty export env to the Ifaces map
-- so that we don't look again
let
- new_export_envs = addToFM export_envs load_mod ([],[])
- new_ifaces = Ifaces this_mod mod_vers_map
- new_export_envs
- decls all_names imp_names (insts, tycls_names) deferred_data_decls inst_mods
+ mod = mkVanillaModule mod_name
+ new_mod_map = addToFM mod_map mod_name (0, False, Just (mod, False, []))
+ new_ifaces = ifaces { iImpModInfo = new_mod_map }
in
setIfacesRn new_ifaces `thenRn_`
- failWithRn new_ifaces (noIfaceErr load_mod) ;
+ failWithRn (mod, new_ifaces) (noIfaceErr mod hi_boot_read) ;
-- Found and parsed!
- Just (ParsedIface _ mod_vers usages exports rd_inst_mods fixs rd_decls rd_insts) ->
+ Just (mod, iface) ->
-- LOAD IT INTO Ifaces
- mapRn loadExport exports `thenRn` \ avails_s ->
- foldlRn (loadDecl load_mod) decls rd_decls `thenRn` \ new_decls ->
- foldlRn (loadInstDecl load_mod) insts rd_insts `thenRn` \ new_insts ->
+
+ -- NB: *first* we do loadDecl, so that the provenance of all the locally-defined
+ --- names is done correctly (notably, whether this is an .hi file or .hi-boot file).
+ -- If we do loadExport first the wrong info gets into the cache (unless we
+ -- explicitly tag each export which seems a bit of a bore)
+
+ getModuleRn `thenRn` \ this_mod_nm ->
let
- export_env = (concat avails_s, fixs)
-
- -- Exclude this module from the "special-inst" modules
- new_inst_mods = inst_mods `unionLists` (filter (/= this_mod) rd_inst_mods)
-
- new_ifaces = Ifaces this_mod
- (addToFM mod_vers_map load_mod mod_vers)
- (addToFM export_envs load_mod export_env)
- new_decls
- all_names imp_names
- (new_insts, tycls_names)
- deferred_data_decls
- new_inst_mods
+ rd_decls = pi_decls iface
+ in
+ foldlRn (loadDecl mod) (iDecls ifaces) rd_decls `thenRn` \ new_decls ->
+ foldlRn (loadInstDecl mod) (iInsts ifaces) (pi_insts iface) `thenRn` \ new_insts ->
+ foldlRn (loadRule mod) (iRules ifaces) (pi_rules iface) `thenRn` \ new_rules ->
+ foldlRn (loadFixDecl mod_name) (iFixes ifaces) rd_decls `thenRn` \ new_fixities ->
+ mapRn (loadExport this_mod_nm) (pi_exports iface) `thenRn` \ avails_s ->
+ let
+ -- For an explicit user import, add to mod_map info about
+ -- the things the imported module depends on, extracted
+ -- from its usage info.
+ mod_map1 = case from of
+ ImportByUser -> addModDeps mod mod_map (pi_usages iface)
+ other -> mod_map
+
+ -- Now add info about this module
+ mod_map2 = addToFM mod_map1 mod_name mod_details
+ mod_details = (pi_mod iface, pi_orphan iface, Just (mod, hi_boot_read, concat avails_s))
+
+ new_ifaces = ifaces { iImpModInfo = mod_map2,
+ iDecls = new_decls,
+ iFixes = new_fixities,
+ iRules = new_rules,
+ iInsts = new_insts }
in
setIfacesRn new_ifaces `thenRn_`
- returnRn new_ifaces
- }
+ returnRn (mod, new_ifaces)
+ }}
-loadExport :: ExportItem -> RnMG [AvailInfo]
-loadExport (mod, entities)
- = mapRn load_entity entities
+addModDeps :: Module -> ImportedModuleInfo
+ -> [ImportVersion a] -> ImportedModuleInfo
+addModDeps mod mod_deps new_deps
+ = foldr add mod_deps new_deps
where
- new_name occ = newGlobalName mod occ
+ is_lib = isLibModule mod -- Don't record dependencies when importing a library module
+ add (imp_mod, version, has_orphans, _) deps
+ | is_lib && not has_orphans = deps
+ | otherwise = addToFM_C combine deps imp_mod (version, has_orphans, Nothing)
+ -- Record dependencies for modules that are
+ -- either are dependent via a non-library module
+ -- or contain orphan rules or instance decls
+
+ -- Don't ditch a module that's already loaded!!
+ combine old@(_, _, Just _) new = old
+ combine old@(_, _, Nothing) new = new
+
+loadExport :: ModuleName -> ExportItem -> RnM d [AvailInfo]
+loadExport this_mod (mod, entities)
+ | mod == this_mod = returnRn []
+ -- If the module exports anything defined in this module, just ignore it.
+ -- Reason: otherwise it looks as if there are two local definition sites
+ -- for the thing, and an error gets reported. Easiest thing is just to
+ -- filter them out up front. This situation only arises if a module
+ -- imports itself, or another module that imported it. (Necessarily,
+ -- this invoves a loop.) Consequence: if you say
+ -- module A where
+ -- import B( AType )
+ -- type AType = ...
+ --
+ -- module B( AType ) where
+ -- import {-# SOURCE #-} A( AType )
+ --
+ -- then you'll get a 'B does not export AType' message. A bit bogus
+ -- but it's a bogus thing to do!
--- The communcation between this little code fragment and the "entity" rule
--- in ParseIface.y is a bit gruesome. The idea is that things which are
--- destined to be AvailTCs show up as (occ, [non-empty-list]), whereas
--- things destined to be Avails show up as (occ, [])
+ | otherwise
+ = mapRn (load_entity mod) entities
+ where
+ new_name mod occ = mkImportedGlobalName mod occ
+
+ load_entity mod (Avail occ)
+ = new_name mod occ `thenRn` \ name ->
+ returnRn (Avail name)
+ load_entity mod (AvailTC occ occs)
+ = new_name mod occ `thenRn` \ name ->
+ mapRn (new_name mod) occs `thenRn` \ names ->
+ returnRn (AvailTC name names)
+
+
+loadFixDecl :: ModuleName -> FixityEnv
+ -> (Version, RdrNameHsDecl)
+ -> RnM d FixityEnv
+loadFixDecl mod_name fixity_env (version, FixD sig@(FixitySig rdr_name fixity loc))
+ = -- Ignore the version; when the fixity changes the version of
+ -- its 'host' entity changes, so we don't need a separate version
+ -- number for fixities
+ mkImportedGlobalName mod_name (rdrNameOcc rdr_name) `thenRn` \ name ->
+ let
+ new_fixity_env = addToNameEnv fixity_env name (FixitySig name fixity loc)
+ in
+ returnRn new_fixity_env
- load_entity (occ, occs)
- = new_name occ `thenRn` \ name ->
- if null occs then
- returnRn (Avail name)
- else
- mapRn new_name occs `thenRn` \ names ->
- returnRn (AvailTC name names)
+ -- Ignore the other sorts of decl
+loadFixDecl mod_name fixity_env other_decl = returnRn fixity_env
-loadDecl :: Module -> DeclsMap
+loadDecl :: Module
+ -> DeclsMap
-> (Version, RdrNameHsDecl)
- -> RnMG DeclsMap
+ -> RnM d DeclsMap
+
loadDecl mod decls_map (version, decl)
- = getDeclBinders new_implicit_name decl `thenRn` \ avail ->
- returnRn (addListToFM decls_map
- [(name,(version,avail,decl)) | name <- availNames avail]
- )
+ = getDeclBinders new_name decl `thenRn` \ maybe_avail ->
+ case maybe_avail of {
+ Nothing -> returnRn decls_map; -- No bindings
+ Just avail ->
+
+ getDeclSysBinders new_name decl `thenRn` \ sys_bndrs ->
+ let
+ main_name = availName avail
+ new_decls_map = foldl add_decl decls_map
+ [ (name, (version, avail, name==main_name, (mod, decl')))
+ | name <- sys_bndrs ++ availNames avail]
+ add_decl decls_map (name, stuff)
+ = WARN( name `elemNameEnv` decls_map, ppr name )
+ addToNameEnv decls_map name stuff
+ in
+ returnRn new_decls_map
+ }
where
- new_implicit_name rdr_name loc = newGlobalName mod (rdrNameOcc rdr_name)
+ -- newImportedBinder puts into the cache the binder with the
+ -- module information set correctly. When the decl is later renamed,
+ -- the binding site will thereby get the correct module.
+ new_name rdr_name loc = newImportedBinder mod rdr_name
+
+ {-
+ If a signature decl is being loaded, and optIgnoreIfacePragmas is on,
+ we toss away unfolding information.
+
+ Also, if the signature is loaded from a module we're importing from source,
+ we do the same. This is to avoid situations when compiling a pair of mutually
+ recursive modules, peering at unfolding info in the interface file of the other,
+ e.g., you compile A, it looks at B's interface file and may as a result change
+ its interface file. Hence, B is recompiled, maybe changing its interface file,
+ which will the unfolding info used in A to become invalid. Simple way out is to
+ just ignore unfolding info.
+
+ [Jan 99: I junked the second test above. If we're importing from an hi-boot
+ file there isn't going to *be* any pragma info. Maybe the above comment
+ dates from a time where we picked up a .hi file first if it existed?]
+ -}
+ decl' = case decl of
+ SigD (IfaceSig name tp ls loc) | opt_IgnoreIfacePragmas -> SigD (IfaceSig name tp [] loc)
+ other -> decl
loadInstDecl :: Module
- -> Bag IfaceInst
+ -> Bag GatedDecl
-> RdrNameInstDecl
- -> RnMG (Bag IfaceInst)
-loadInstDecl mod_name insts decl@(InstDecl inst_ty binds uprags dfun_name src_loc)
+ -> RnM d (Bag GatedDecl)
+loadInstDecl mod insts decl@(InstDecl inst_ty binds uprags dfun_name src_loc)
=
-- Find out what type constructors and classes are "gates" for the
-- instance declaration. If all these "gates" are slurped in then
--
-- Here the gates are Baz and T, but *not* Foo.
let
- munged_inst_ty = case inst_ty of
- HsForAllTy tvs cxt ty -> HsForAllTy tvs [] ty
- HsPreForAllTy cxt ty -> HsPreForAllTy [] ty
- other -> inst_ty
+ munged_inst_ty = removeContext inst_ty
+ free_names = extractHsTyRdrNames munged_inst_ty
in
- -- We find the gates by renaming the instance type with in a
- -- and returning the occurrence pool.
- initRnMS emptyRnEnv mod_name (InterfaceMode Compulsory) (
- findOccurrencesRn (rnHsSigType (\sty -> text "an instance decl") munged_inst_ty)
- ) `thenRn` \ gate_names ->
- returnRn (((mod_name, decl), gate_names) `consBag` insts)
+ setModuleRn (moduleName mod) $
+ mapRn mkImportedGlobalFromRdrName free_names `thenRn` \ gate_names ->
+ returnRn ((mkNameSet gate_names, (mod, InstD decl)) `consBag` insts)
+
+
+-- In interface files, the instance decls now look like
+-- forall a. Foo a -> Baz (T a)
+-- so we have to strip off function argument types as well
+-- as the bit before the '=>' (which is always empty in interface files)
+removeContext (HsForAllTy tvs cxt ty) = HsForAllTy tvs [] (removeFuns ty)
+removeContext ty = removeFuns ty
+
+removeFuns (MonoFunTy _ ty) = removeFuns ty
+removeFuns ty = ty
+
+
+loadRule :: Module -> Bag GatedDecl
+ -> RdrNameRuleDecl -> RnM d (Bag GatedDecl)
+-- "Gate" the rule simply by whether the rule variable is
+-- needed. We can refine this later.
+loadRule mod rules decl@(IfaceRuleDecl var body src_loc)
+ = setModuleRn (moduleName mod) $
+ mkImportedGlobalFromRdrName var `thenRn` \ var_name ->
+ returnRn ((unitNameSet var_name, (mod, RuleD decl)) `consBag` rules)
\end{code}
%********************************************************
\begin{code}
-checkUpToDate :: Module -> RnMG Bool -- True <=> no need to recompile
+checkUpToDate :: ModuleName -> RnMG Bool -- True <=> no need to recompile
checkUpToDate mod_name
- = findAndReadIface doc_str mod_name `thenRn` \ read_result ->
+ = getIfacesRn `thenRn` \ ifaces ->
+ findAndReadIface doc_str mod_name
+ ImportByUser
+ (error "checkUpToDate") `thenRn` \ (_, read_result) ->
+
+ -- CHECK WHETHER WE HAVE IT ALREADY
case read_result of
Nothing -> -- Old interface file not found, so we'd better bail out
traceRn (sep [ptext SLIT("Didnt find old iface"),
- pprModule PprDebug mod_name]) `thenRn_`
+ pprModuleName mod_name]) `thenRn_`
returnRn False
- Just (ParsedIface _ _ usages _ _ _ _ _)
+ Just (_, iface)
-> -- Found it, so now check it
- checkModUsage usages
+ checkModUsage (pi_usages iface)
where
-- Only look in current directory, with suffix .hi
- doc_str = sep [ptext SLIT("Need usage info from"), pprModule PprDebug mod_name]
+ doc_str = sep [ptext SLIT("need usage info from"), pprModuleName mod_name]
checkModUsage [] = returnRn True -- Yes! Everything is up to date!
-checkModUsage ((mod, old_mod_vers, old_local_vers) : rest)
- = loadInterface doc_str mod `thenRn` \ ifaces ->
+checkModUsage ((mod_name, old_mod_vers, _, whats_imported) : rest)
+ = loadInterface doc_str mod_name ImportBySystem `thenRn` \ (mod, ifaces) ->
let
- Ifaces _ mod_vers _ decls _ _ _ _ _ = ifaces
- maybe_new_mod_vers = lookupFM mod_vers mod
- Just new_mod_vers = maybe_new_mod_vers
+ maybe_mod_vers = case lookupFM (iImpModInfo ifaces) mod_name of
+ Just (version, _, Just (_, _, _)) -> Just version
+ other -> Nothing
in
- -- If we can't find a version number for the old module then
- -- bail out saying things aren't up to date
- if not (maybeToBool maybe_new_mod_vers) then
- returnRn False
- else
+ case maybe_mod_vers of {
+ Nothing -> -- If we can't find a version number for the old module then
+ -- bail out saying things aren't up to date
+ traceRn (sep [ptext SLIT("Can't find version number for module"),
+ pprModuleName mod_name]) `thenRn_`
+ returnRn False ;
+
+ Just new_mod_vers ->
-- If the module version hasn't changed, just move on
if new_mod_vers == old_mod_vers then
- traceRn (sep [ptext SLIT("Module version unchanged:"), pprModule PprDebug mod]) `thenRn_`
+ traceRn (sep [ptext SLIT("Module version unchanged:"), pprModuleName mod_name]) `thenRn_`
checkModUsage rest
else
- traceRn (sep [ptext SLIT("Module version has changed:"), pprModule PprDebug mod]) `thenRn_`
+ traceRn (sep [ptext SLIT("Module version has changed:"), pprModuleName mod_name]) `thenRn_`
- -- New module version, so check entities inside
- checkEntityUsage mod decls old_local_vers `thenRn` \ up_to_date ->
+ -- Module version changed, so check entities inside
+
+ -- If the usage info wants to say "I imported everything from this module"
+ -- it does so by making whats_imported equal to Everything
+ -- In that case, we must recompile
+ case whats_imported of {
+ Everything -> traceRn (ptext SLIT("...and I needed the whole module")) `thenRn_`
+ returnRn False; -- Bale out
+
+ Specifically old_local_vers ->
+
+ -- Non-empty usage list, so check item by item
+ checkEntityUsage mod_name (iDecls ifaces) old_local_vers `thenRn` \ up_to_date ->
if up_to_date then
traceRn (ptext SLIT("...but the bits I use haven't.")) `thenRn_`
checkModUsage rest -- This one's ok, so check the rest
else
returnRn False -- This one failed, so just bail out now
+ }}
where
- doc_str = sep [ptext SLIT("need version info for"), pprModule PprDebug mod]
+ doc_str = sep [ptext SLIT("need version info for"), pprModuleName mod_name]
checkEntityUsage mod decls []
= returnRn True -- Yes! All up to date!
checkEntityUsage mod decls ((occ_name,old_vers) : rest)
- = newGlobalName mod occ_name `thenRn` \ name ->
- case lookupFM decls name of
+ = mkImportedGlobalName mod occ_name `thenRn` \ name ->
+ case lookupNameEnv decls name of
Nothing -> -- We used it before, but it ain't there now
- traceRn (sep [ptext SLIT("...and this no longer exported:"), ppr PprDebug name]) `thenRn_`
+ putDocRn (sep [ptext SLIT("No longer exported:"), ppr name]) `thenRn_`
returnRn False
- Just (new_vers,_,_) -- It's there, but is it up to date?
+ Just (new_vers,_,_,_) -- It's there, but is it up to date?
| new_vers == old_vers
-- Up to date, so check the rest
-> checkEntityUsage mod decls rest
| otherwise
-- Out of date, so bale out
- -> traceRn (sep [ptext SLIT("...and this is out of date:"), ppr PprDebug name]) `thenRn_`
+ -> putDocRn (sep [ptext SLIT("Out of date:"), ppr name]) `thenRn_`
returnRn False
\end{code}
%*********************************************************
\begin{code}
-importDecl :: Name -> Necessity -> RnMG (Maybe RdrNameHsDecl)
- -- Returns Nothing for a wired-in or already-slurped decl
-
-importDecl name necessity
- = checkSlurped name `thenRn` \ already_slurped ->
- if already_slurped then
- traceRn (sep [text "Already slurped:", ppr PprDebug name]) `thenRn_`
+importDecl :: Name -> RnMG (Maybe (Module, RdrNameHsDecl))
+ -- Returns Nothing for
+ -- (a) wired in name
+ -- (b) local decl
+ -- (c) already slurped
+
+importDecl name
+ | isWiredInName name
+ = returnRn Nothing
+ | otherwise
+ = getSlurped `thenRn` \ already_slurped ->
+ if name `elemNameSet` already_slurped then
returnRn Nothing -- Already dealt with
else
- if isWiredInName name then
- getWiredInDecl name necessity
- else
- getIfacesRn `thenRn` \ ifaces ->
- let
- Ifaces this_mod _ _ _ _ _ _ _ _ = ifaces
- mod = nameModule name
- in
- if mod == this_mod then -- Don't bring in decls from
- pprTrace "importDecl wierdness:" (ppr PprDebug name) $
- returnRn Nothing -- the renamed module's own interface file
- --
- else
- getNonWiredInDecl name necessity
+ getModuleRn `thenRn` \ this_mod ->
+ let
+ mod = moduleName (nameModule name)
+ in
+ if mod == this_mod then -- Don't bring in decls from
+ -- the renamed module's own interface file
+ addWarnRn (importDeclWarn mod name) `thenRn_`
+ returnRn Nothing
+ else
+ getNonWiredInDecl name
\end{code}
\begin{code}
-getNonWiredInDecl :: Name -> Necessity -> RnMG (Maybe RdrNameHsDecl)
-getNonWiredInDecl needed_name necessity
- = traceRn doc_str `thenRn_`
- loadInterface doc_str mod `thenRn` \ (Ifaces _ _ _ decls _ _ _ _ _) ->
- case lookupFM decls needed_name of
-
- -- Special case for data/newtype type declarations
- Just (version, avail, TyD ty_decl) | is_data_or_newtype ty_decl
- -> getNonWiredDataDecl needed_name version avail ty_decl `thenRn` \ (avail', maybe_decl) ->
- recordSlurp (Just version) necessity avail' `thenRn_`
- returnRn maybe_decl
-
- Just (version,avail,decl)
- -> recordSlurp (Just version) necessity avail `thenRn_`
- returnRn (Just decl)
-
- Nothing -> -- Can happen legitimately for "Optional" occurrences
- case necessity of {
- Optional -> addWarnRn (getDeclWarn needed_name);
- other -> addErrRn (getDeclErr needed_name)
- } `thenRn_`
- returnRn Nothing
+getNonWiredInDecl :: Name -> RnMG (Maybe (Module, RdrNameHsDecl))
+getNonWiredInDecl needed_name
+ = traceRn doc_str `thenRn_`
+ loadHomeInterface doc_str needed_name `thenRn` \ (_, ifaces) ->
+ case lookupNameEnv (iDecls ifaces) needed_name of
+
+ Just (version,avail,_,decl)
+ -> recordSlurp (Just version) avail `thenRn_`
+ returnRn (Just decl)
+
+ Nothing -- Can happen legitimately for "Optional" occurrences
+ -> addErrRn (getDeclErr needed_name) `thenRn_`
+ returnRn Nothing
where
- doc_str = sep [ptext SLIT("Need decl for"), ppr PprDebug needed_name]
- mod = nameModule needed_name
-
- is_data_or_newtype (TyData _ _ _ _ _ _ _ _) = True
- is_data_or_newtype other = False
+ doc_str = ptext SLIT("need decl for") <+> ppr needed_name
\end{code}
@getWiredInDecl@ maps a wired-in @Name@ to what it makes available.
All this is necessary so that we know all types that are "in play", so
that we know just what instances to bring into scope.
-\begin{code}
-getWiredInDecl name necessity
- = initRnMS emptyRnEnv mod_name (InterfaceMode necessity)
- get_wired `thenRn` \ avail ->
- recordSlurp Nothing necessity avail `thenRn_`
-
- -- Force in the home module in case it has instance decls for
- -- the thing we are interested in.
- --
- -- Mini hack 1: no point for non-tycons/class; and if we
- -- do this we find PrelNum trying to import PackedString,
- -- because PrelBase's .hi file mentions PackedString.unpackString
- -- But PackedString.hi isn't built by that point!
- --
- -- Mini hack 2; GHC is guaranteed not to have
- -- instance decls, so it's a waste of time to read it
- --
- -- NB: We *must* look at the availName of the slurped avail,
- -- not the name passed to getWiredInDecl! Why? Because if a data constructor
- -- or class op is passed to getWiredInDecl we'll pull in the whole data/class
- -- decl, and recordSlurp will record that fact. But since the data constructor
- -- isn't a tycon/class we won't force in the home module. And even if the
- -- type constructor/class comes along later, loadDecl will say that it's already
- -- been slurped, so getWiredInDecl won't even be called. Pretty obscure bug, this was.
- let
- main_name = availName avail
- main_is_tc = case avail of { AvailTC _ _ -> True; Avail _ -> False }
- mod = nameModule main_name
- doc_str = sep [ptext SLIT("Need home module for wired in thing"), ppr PprDebug name]
- in
- (if not main_is_tc || mod == gHC__ then
- returnRn ()
- else
- loadInterface doc_str mod `thenRn_`
- returnRn ()
- ) `thenRn_`
-
- returnRn Nothing -- No declaration to process further
- where
-
- get_wired | is_tycon -- ... a type constructor
- = get_wired_tycon the_tycon
-
- | (isAlgCon the_id) -- ... a wired-in data constructor
- = get_wired_tycon (dataConTyCon the_id)
-
- | otherwise -- ... a wired-in non data-constructor
- = get_wired_id the_id
-
- mod_name = nameModule name
- maybe_wired_in_tycon = maybeWiredInTyConName name
- is_tycon = maybeToBool maybe_wired_in_tycon
- maybe_wired_in_id = maybeWiredInIdName name
- Just the_tycon = maybe_wired_in_tycon
- Just the_id = maybe_wired_in_id
-
-
-get_wired_id id
- = addImplicitOccsRn (nameSetToList id_mentioned) `thenRn_`
- returnRn (Avail (getName id))
- where
- id_mentioned = namesOfType (idType id)
-
-get_wired_tycon tycon
- | isSynTyCon tycon
- = addImplicitOccsRn (nameSetToList mentioned) `thenRn_`
- returnRn (AvailTC tc_name [tc_name])
- where
- tc_name = getName tycon
- (tyvars,ty) = getSynTyConDefn tycon
- mentioned = namesOfType ty `minusNameSet` mkNameSet (map getName tyvars)
-
-get_wired_tycon tycon
- | otherwise -- data or newtype
- = addImplicitOccsRn (nameSetToList mentioned) `thenRn_`
- returnRn (AvailTC tycon_name (tycon_name : map getName data_cons))
- where
- tycon_name = getName tycon
- data_cons = tyConDataCons tycon
- mentioned = foldr (unionNameSets . namesOfType . idType) emptyNameSet data_cons
-\end{code}
%* *
%*********************************************************
+@getInterfaceExports@ is called only for directly-imported modules
+
\begin{code}
-getInterfaceExports :: Module -> RnMG (Avails, [(OccName,Fixity)])
-getInterfaceExports mod
- = loadInterface doc_str mod `thenRn` \ (Ifaces _ _ export_envs _ _ _ _ _ _) ->
- case lookupFM export_envs mod of
+getInterfaceExports :: ModuleName -> WhereFrom -> RnMG (Module, Avails)
+getInterfaceExports mod_name from
+ = loadInterface doc_str mod_name from `thenRn` \ (mod, ifaces) ->
+ case lookupFM (iImpModInfo ifaces) mod_name of
Nothing -> -- Not there; it must be that the interface file wasn't found;
-- the error will have been reported already.
-- (Actually loadInterface should put the empty export env in there
-- anyway, but this does no harm.)
- returnRn ([],[])
+ returnRn (mod, [])
- Just stuff -> returnRn stuff
+ Just (_, _, Just (mod, _, avails)) -> returnRn (mod, avails)
where
- doc_str = sep [pprModule PprDebug mod, ptext SLIT("is directly imported")]
+ doc_str = sep [pprModuleName mod_name, ptext SLIT("is directly imported")]
\end{code}
%*********************************************************
%* *
-\subsection{Data type declarations are handled specially}
+\subsection{Instance declarations are handled specially}
%* *
%*********************************************************
-Data type declarations get special treatment. If we import a data type decl
-with all its constructors, we end up importing all the types mentioned in
-the constructors' signatures, and hence {\em their} data type decls, and so on.
-In effect, we get the transitive closure of data type decls. Worse, this drags
-in tons on instance decls, and their unfoldings, and so on.
-
-If only the type constructor is mentioned, then all this is a waste of time.
-If any of the data constructors are mentioned then we really have to
-drag in the whole declaration.
-
-So when we import the type constructor for a @data@ or @newtype@ decl, we
-put it in the "deferred data/newtype decl" pile in Ifaces. Right at the end
-we slurp these decls, if they havn't already been dragged in by an occurrence
-of a constructor.
-
\begin{code}
-getNonWiredDataDecl needed_name
- version
- avail@(AvailTC tycon_name _)
- ty_decl@(TyData new_or_data context tycon tyvars condecls derivings pragmas src_loc)
- | needed_name == tycon_name
- && opt_PruneTyDecls
- && not (nameUnique needed_name `elem` cCallishTyKeys) -- Hack! Don't prune these tycons whose constructors
- -- the desugarer must be able to see when desugaring
- -- a CCall. Ugh!
- = -- Need the type constructor; so put it in the deferred set for now
- getIfacesRn `thenRn` \ ifaces ->
+getImportedInstDecls :: NameSet -> RnMG [(Module,RdrNameHsDecl)]
+getImportedInstDecls gates
+ = -- First load any orphan-instance modules that aren't aready loaded
+ -- Orphan-instance modules are recorded in the module dependecnies
+ getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces this_mod mod_vers_map export_envs decls_fm slurped_names imp_names unslurped_insts deferred_data_decls inst_mods = ifaces
- new_ifaces = Ifaces this_mod mod_vers_map export_envs decls_fm slurped_names imp_names unslurped_insts new_deferred_data_decls inst_mods
-
- no_constr_ty_decl = TyData new_or_data [] tycon tyvars [] derivings pragmas src_loc
- new_deferred_data_decls = addToFM deferred_data_decls tycon_name no_constr_ty_decl
- -- Nota bene: we nuke both the constructors and the context in the deferred decl.
- -- If we don't nuke the context then renaming the deferred data decls can give
- -- new unresolved names (for the classes). This could be handled, but there's
- -- no point. If the data type is completely abstract then we aren't interested
- -- its context.
- in
- setIfacesRn new_ifaces `thenRn_`
- returnRn (AvailTC tycon_name [tycon_name], Nothing)
-
- | otherwise
- = -- Need a data constructor, so delete the data decl from the deferred set if it's there
- getIfacesRn `thenRn` \ ifaces ->
- let
- Ifaces this_mod mod_vers_map export_envs decls_fm slurped_names imp_names unslurped_insts deferred_data_decls inst_mods = ifaces
- new_ifaces = Ifaces this_mod mod_vers_map export_envs decls_fm slurped_names imp_names unslurped_insts new_deferred_data_decls inst_mods
-
- new_deferred_data_decls = delFromFM deferred_data_decls tycon_name
+ orphan_mods = [mod | (mod, (_, True, Nothing)) <- fmToList (iImpModInfo ifaces)]
in
- setIfacesRn new_ifaces `thenRn_`
- returnRn (avail, Just (TyD ty_decl))
-\end{code}
-
-\begin{code}
-getDeferredDataDecls :: RnMG [(Name, RdrNameTyDecl)]
-getDeferredDataDecls
- = getIfacesRn `thenRn` \ (Ifaces _ _ _ _ _ _ _ deferred_data_decls _) ->
- let
- deferred_list = fmToList deferred_data_decls
- trace_msg = hang (text "Slurping abstract data/newtype decls for: ")
- 4 (ppr PprDebug (map fst deferred_list))
- in
- traceRn trace_msg `thenRn_`
- returnRn deferred_list
-\end{code}
-
-
-%*********************************************************
-%* *
-\subsection{Instance declarations are handled specially}
-%* *
-%*********************************************************
-
-\begin{code}
-getImportedInstDecls :: RnMG [(Module,RdrNameInstDecl)]
-getImportedInstDecls
- = -- First load any special-instance modules that aren't aready loaded
- getSpecialInstModules `thenRn` \ inst_mods ->
- mapRn load_it inst_mods `thenRn_`
+ traceRn (text "Loading orphan modules" <+> fsep (map pprModuleName orphan_mods)) `thenRn_`
+ mapRn_ load_it orphan_mods `thenRn_`
-- Now we're ready to grab the instance declarations
-- Find the un-gated ones and return them,
-- removing them from the bag kept in Ifaces
- getIfacesRn `thenRn` \ ifaces ->
+ getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces this_mod mod_vers export_envs decls slurped_names imp_names (insts, tycls_names) deferred_data_decls inst_mods = ifaces
-
- -- An instance decl is ungated if all its gates have been slurped
- select_ungated :: IfaceInst -- A gated inst decl
-
- -> ([(Module, RdrNameInstDecl)], [IfaceInst]) -- Accumulator
-
- -> ([(Module, RdrNameInstDecl)], -- The ungated ones
- [IfaceInst]) -- Still gated, but with
- -- depeleted gates
- select_ungated (decl,gates) (ungated_decls, gated_decls)
- | null remaining_gates
- = (decl : ungated_decls, gated_decls)
- | otherwise
- = (ungated_decls, (decl, remaining_gates) : gated_decls)
- where
- remaining_gates = filter (not . (`elemNameSet` tycls_names)) gates
-
- (un_gated_insts, still_gated_insts) = foldrBag select_ungated ([], []) insts
-
- new_ifaces = Ifaces this_mod mod_vers export_envs decls slurped_names imp_names
- ((listToBag still_gated_insts), tycls_names)
- -- NB: don't throw away tycls_names; we may comre across more instance decls
- deferred_data_decls
- inst_mods
+ (decls, new_insts) = selectGated gates (iInsts ifaces)
in
- traceRn (sep [text "getInstDecls:", fsep (map (ppr PprDebug) (nameSetToList tycls_names))]) `thenRn_`
- setIfacesRn new_ifaces `thenRn_`
- returnRn un_gated_insts
- where
- load_it mod = loadInterface (doc_str mod) mod
- doc_str mod = sep [pprModule PprDebug mod, ptext SLIT("is a special-instance module")]
+ setIfacesRn (ifaces { iInsts = new_insts }) `thenRn_`
+ traceRn (sep [text "getImportedInstDecls:",
+ nest 4 (fsep (map ppr (nameSetToList gates))),
+ text "Slurped" <+> int (length decls) <+> text "instance declarations"]) `thenRn_`
+ returnRn decls
+ where
+ load_it mod = loadInterface (doc_str mod) mod ImportBySystem
+ doc_str mod = sep [pprModuleName mod, ptext SLIT("is a orphan-instance module")]
-getSpecialInstModules :: RnMG [Module]
-getSpecialInstModules
- = getIfacesRn `thenRn` \ ifaces ->
+getImportedRules :: RnMG [(Module,RdrNameHsDecl)]
+getImportedRules
+ = getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces _ _ _ _ _ _ _ _ inst_mods = ifaces
+ gates = iSlurp ifaces -- Anything at all that's been slurped
+ (decls, new_rules) = selectGated gates (iRules ifaces)
in
- returnRn inst_mods
+ setIfacesRn (ifaces { iRules = new_rules }) `thenRn_`
+ traceRn (sep [text "getImportedRules:",
+ text "Slurped" <+> int (length decls) <+> text "rules"]) `thenRn_`
+ returnRn decls
+
+selectGated gates decl_bag
+#ifdef DEBUG
+ | opt_NoPruneDecls -- Just to try the effect of not gating at all
+ = (foldrBag (\ (_,d) ds -> d:ds) [] decl_bag, emptyBag) -- Grab them all
+
+ | otherwise
+#endif
+ = foldrBag select ([], emptyBag) decl_bag
+ where
+ select (reqd, decl) (yes, no)
+ | isEmptyNameSet (reqd `minusNameSet` gates) = (decl:yes, no)
+ | otherwise = (yes, (reqd,decl) `consBag` no)
+
+lookupFixity :: Name -> RnMS Fixity
+lookupFixity name
+ | isLocallyDefined name
+ = getFixityEnv `thenRn` \ local_fix_env ->
+ case lookupNameEnv local_fix_env name of
+ Just (FixitySig _ fix _) -> returnRn fix
+ Nothing -> returnRn defaultFixity
+
+ | otherwise -- Imported
+ = loadHomeInterface doc name `thenRn` \ (_, ifaces) ->
+ case lookupNameEnv (iFixes ifaces) name of
+ Just (FixitySig _ fix _) -> returnRn fix
+ Nothing -> returnRn defaultFixity
+ where
+ doc = ptext SLIT("Checking fixity for") <+> ppr name
\end{code}
A's usages, because we must recompile A to ensure that A.hi changes appropriately.
\begin{code}
-getImportVersions :: Module -- Name of this module
+getImportVersions :: ModuleName -- Name of this module
-> Maybe [IE any] -- Export list for this module
-> RnMG (VersionInfo Name) -- Version info for these names
getImportVersions this_mod exports
= getIfacesRn `thenRn` \ ifaces ->
let
- Ifaces _ mod_versions_map _ _ _ imp_names _ _ _ = ifaces
- mod_version mod = expectJust "import_versions" (lookupFM mod_versions_map mod)
-
- -- mv_map groups together all the things imported from a particular module.
- mv_map, mv_map_mod :: FiniteMap Module [LocalVersion Name]
-
- mv_map_mod = foldl add_mod emptyFM export_mods
- -- mv_map_mod records all the modules that have a "module M"
- -- in this module's export list
-
- mv_map = foldl add_mv mv_map_mod imp_names
- -- mv_map adds the version numbers of things exported individually
+ mod_map = iImpModInfo ifaces
+ imp_names = iVSlurp ifaces
+
+ -- mv_map groups together all the things imported from a particular module.
+ mv_map1, mv_map2 :: FiniteMap ModuleName (WhatsImported Name)
+
+ -- mv_map1 records all the modules that have a "module M"
+ -- in this module's export list with an "Everything"
+ mv_map1 = foldr add_mod emptyFM export_mods
+
+ -- mv_map2 adds the version numbers of things exported individually
+ mv_map2 = foldr add_mv mv_map1 imp_names
+
+ -- Build the result list by adding info for each module,
+ -- *omitting* (a) library modules
+ -- (b) source-imported modules
+ mk_version_info mod_name (version, has_orphans, cts) so_far
+ | omit cts = so_far -- Don't record usage info for this module
+ | otherwise = (mod_name, version, has_orphans, whats_imported) : so_far
+ where
+ whats_imported = case lookupFM mv_map2 mod_name of
+ Just wi -> wi
+ Nothing -> Specifically []
+
+ omit (Just (mod, boot_import, _)) = isLibModule mod || boot_import
+ omit Nothing = False
in
- returnRn [ (mod, mod_version mod, local_versions)
- | (mod, local_versions) <- fmToList mv_map
- ]
-
+ returnRn (foldFM mk_version_info [] mod_map)
where
export_mods = case exports of
Nothing -> []
Just es -> [mod | IEModuleContents mod <- es, mod /= this_mod]
- add_mv mv_map v@(name, version)
- = addToFM_C (\ ls _ -> (v:ls)) mv_map mod [v]
+ add_mv v@(name, version) mv_map
+ = addToFM_C add_item mv_map mod (Specifically [v])
where
- mod = nameModule name
+ mod = moduleName (nameModule name)
- add_mod mv_map mod = addToFM mv_map mod []
+ add_item Everything _ = Everything
+ add_item (Specifically xs) _ = Specifically (v:xs)
+
+ add_mod mod mv_map = addToFM mv_map mod Everything
\end{code}
\begin{code}
-checkSlurped name
- = getIfacesRn `thenRn` \ (Ifaces _ _ _ _ slurped_names _ _ _ _) ->
- returnRn (name `elemNameSet` slurped_names)
-
-getSlurpedNames :: RnMG NameSet
-getSlurpedNames
+getSlurped
= getIfacesRn `thenRn` \ ifaces ->
+ returnRn (iSlurp ifaces)
+
+recordSlurp maybe_version avail
+ = getIfacesRn `thenRn` \ ifaces@(Ifaces { iSlurp = slurped_names,
+ iVSlurp = imp_names }) ->
let
- Ifaces _ _ _ _ slurped_names _ _ _ _ = ifaces
- in
- returnRn slurped_names
-
-recordSlurp maybe_version necessity avail
- = traceRn (hsep [text "Record slurp:", pprAvail (PprForUser opt_PprUserLength) avail,
- -- NB PprForDebug prints export flag, which is too
- -- strict; it's a knot-tied thing in RnNames
- case necessity of {Compulsory -> text "comp"; Optional -> text "opt"}]) `thenRn_`
- getIfacesRn `thenRn` \ ifaces ->
- let
- Ifaces this_mod mod_vers export_envs decls slurped_names imp_names (insts, tycls_names) deferred_data_decls inst_mods = ifaces
new_slurped_names = addAvailToNameSet slurped_names avail
new_imp_names = case maybe_version of
Just version -> (availName avail, version) : imp_names
Nothing -> imp_names
-
- -- Add to the names that will let in instance declarations;
- -- but only (a) if it's a type/class
- -- (b) if it's compulsory (unless the test flag opt_PruneInstDecls is off)
- new_tycls_names = case avail of
- AvailTC tc _ | not opt_PruneInstDecls ||
- case necessity of {Optional -> False; Compulsory -> True }
- -> tycls_names `addOneToNameSet` tc
- otherwise -> tycls_names
-
- new_ifaces = Ifaces this_mod mod_vers export_envs decls
- new_slurped_names
- new_imp_names
- (insts, new_tycls_names)
- deferred_data_decls
- inst_mods
in
- setIfacesRn new_ifaces
+ setIfacesRn (ifaces { iSlurp = new_slurped_names,
+ iVSlurp = new_imp_names })
\end{code}
are handled by the sourc-code specific stuff in RnNames.
\begin{code}
-getDeclBinders :: (RdrName -> SrcLoc -> RnMG Name) -- New-name function
+getDeclBinders :: (RdrName -> SrcLoc -> RnM d Name) -- New-name function
-> RdrNameHsDecl
- -> RnMG AvailInfo
+ -> RnM d (Maybe AvailInfo)
-getDeclBinders new_name (TyD (TyData _ _ tycon _ condecls _ _ src_loc))
+getDeclBinders new_name (TyClD (TyData _ _ tycon _ condecls _ _ src_loc))
= new_name tycon src_loc `thenRn` \ tycon_name ->
getConFieldNames new_name condecls `thenRn` \ sub_names ->
- returnRn (AvailTC tycon_name (tycon_name : nub sub_names))
+ returnRn (Just (AvailTC tycon_name (tycon_name : nub sub_names)))
-- The "nub" is because getConFieldNames can legitimately return duplicates,
-- when a record declaration has the same field in multiple constructors
-getDeclBinders new_name (TyD (TySynonym tycon _ _ src_loc))
+getDeclBinders new_name (TyClD (TySynonym tycon _ _ src_loc))
= new_name tycon src_loc `thenRn` \ tycon_name ->
- returnRn (AvailTC tycon_name [tycon_name])
+ returnRn (Just (AvailTC tycon_name [tycon_name]))
-getDeclBinders new_name (ClD (ClassDecl _ cname _ sigs _ _ src_loc))
+getDeclBinders new_name (TyClD (ClassDecl _ cname _ sigs _ _ _ _ _ src_loc))
= new_name cname src_loc `thenRn` \ class_name ->
- mapRn (getClassOpNames new_name) sigs `thenRn` \ sub_names ->
- returnRn (AvailTC class_name (class_name : sub_names))
+
+ -- Record the names for the class ops
+ let
+ -- just want class-op sigs
+ op_sigs = filter isClassOpSig sigs
+ in
+ mapRn (getClassOpNames new_name) op_sigs `thenRn` \ sub_names ->
+
+ returnRn (Just (AvailTC class_name (class_name : sub_names)))
getDeclBinders new_name (SigD (IfaceSig var ty prags src_loc))
= new_name var src_loc `thenRn` \ var_name ->
- returnRn (Avail var_name)
+ returnRn (Just (Avail var_name))
-getDeclBinders new_name (DefD _) = returnRn NotAvailable
-getDeclBinders new_name (InstD _) = returnRn NotAvailable
+getDeclBinders new_name (FixD _) = returnRn Nothing
+getDeclBinders new_name (ForD _) = returnRn Nothing
+getDeclBinders new_name (DefD _) = returnRn Nothing
+getDeclBinders new_name (InstD _) = returnRn Nothing
+getDeclBinders new_name (RuleD _) = returnRn Nothing
----------------
-getConFieldNames new_name (ConDecl con _ (RecCon fielddecls) src_loc : rest)
+getConFieldNames new_name (ConDecl con _ _ (RecCon fielddecls) src_loc : rest)
= mapRn (\n -> new_name n src_loc) (con:fields) `thenRn` \ cfs ->
getConFieldNames new_name rest `thenRn` \ ns ->
returnRn (cfs ++ ns)
where
fields = concat (map fst fielddecls)
-getConFieldNames new_name (ConDecl con _ _ src_loc : rest)
+getConFieldNames new_name (ConDecl con _ _ condecl src_loc : rest)
= new_name con src_loc `thenRn` \ n ->
+ (case condecl of
+ NewCon _ (Just f) ->
+ new_name f src_loc `thenRn` \ new_f ->
+ returnRn [n,new_f]
+ _ -> returnRn [n]) `thenRn` \ nn ->
getConFieldNames new_name rest `thenRn` \ ns ->
- returnRn (n:ns)
+ returnRn (nn ++ ns)
getConFieldNames new_name [] = returnRn []
getClassOpNames new_name (ClassOpSig op _ _ src_loc) = new_name op src_loc
\end{code}
+@getDeclSysBinders@ gets the implicit binders introduced by a decl.
+A the moment that's just the tycon and datacon that come with a class decl.
+They aren'te returned by getDeclBinders because they aren't in scope;
+but they *should* be put into the DeclsMap of this module.
+
+Note that this excludes the default-method names of a class decl,
+and the dict fun of an instance decl, because both of these have
+bindings of their own elsewhere.
+
+\begin{code}
+getDeclSysBinders new_name (TyClD (ClassDecl _ cname _ sigs _ _ tname dname snames src_loc))
+ = new_name dname src_loc `thenRn` \ datacon_name ->
+ new_name tname src_loc `thenRn` \ tycon_name ->
+ sequenceRn [new_name n src_loc | n <- snames] `thenRn` \ scsel_names ->
+ returnRn (tycon_name : datacon_name : scsel_names)
+
+getDeclSysBinders new_name other_decl
+ = returnRn []
+\end{code}
%*********************************************************
%* *
%*********************************************************
\begin{code}
-findAndReadIface :: Doc -> Module -> RnMG (Maybe ParsedIface)
+findAndReadIface :: SDoc -> ModuleName -> WhereFrom
+ -> Bool -- Only relevant for SystemImport
+ -- True <=> Look for a .hi file
+ -- False <=> Look for .hi-boot file unless there's
+ -- a library .hi file
+ -> RnM d (Bool, Maybe (Module, ParsedIface))
+ -- Bool is True if the interface actually read was a .hi-boot one
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-findAndReadIface doc_str filename
+
+findAndReadIface doc_str mod_name from hi_file
= traceRn trace_msg `thenRn_`
- getSearchPathRn `thenRn` \ dirs ->
- try dirs dirs
+ -- we keep two maps for interface files,
+ -- one for 'normal' ones, the other for .hi-boot files,
+ -- hence the need to signal which kind we're interested.
+
+ getHiMaps `thenRn` \ hi_maps ->
+
+ case find_path from hi_maps of
+ -- Found the file
+ (hi_boot, Just (fpath, mod)) -> traceRn (ptext SLIT("...reading from") <+> text fpath) `thenRn_`
+ readIface mod fpath `thenRn` \ result ->
+ returnRn (hi_boot, result)
+ (hi_boot, Nothing) -> traceRn (ptext SLIT("...not found")) `thenRn_`
+ returnRn (hi_boot, Nothing)
where
- trace_msg = hang (hcat [ptext SLIT("Reading interface for "),
- ptext filename, semi])
- 4 (hcat [ptext SLIT("reason: "), doc_str])
-
- try all_dirs [] = traceRn (ptext SLIT("...failed")) `thenRn_`
- returnRn Nothing
-
- try all_dirs ((dir,hisuf):dirs)
- = readIface file_path `thenRn` \ read_result ->
- case read_result of
- Nothing -> try all_dirs dirs
- Just iface -> traceRn (ptext SLIT("...done")) `thenRn_`
- returnRn (Just iface)
- where
- file_path = dir ++ "/" ++ moduleString filename ++ hisuf
+ find_path ImportByUser (hi_map, _) = (False, lookupFM hi_map mod_name)
+ find_path ImportByUserSource (_, hiboot_map) = (True, lookupFM hiboot_map mod_name)
+
+ find_path ImportBySystem (hi_map, hiboot_map)
+ | hi_file
+ = -- If the module we seek is in our dependent set,
+ -- Look for a .hi file
+ (False, lookupFM hi_map mod_name)
+
+ | otherwise
+ -- Check if there's a library module of that name
+ -- If not, look for an hi-boot file
+ = case lookupFM hi_map mod_name of
+ stuff@(Just (_, mod)) | isLibModule mod -> (False, stuff)
+ other -> (True, lookupFM hiboot_map mod_name)
+
+ trace_msg = sep [hsep [ptext SLIT("Reading"),
+ ppr from,
+ ptext SLIT("interface for"),
+ pprModuleName mod_name <> semi],
+ nest 4 (ptext SLIT("reason:") <+> doc_str)]
\end{code}
-@readIface@ trys just one file.
+@readIface@ tries just the one file.
\begin{code}
-readIface :: String -> RnMG (Maybe ParsedIface)
+readIface :: Module -> String -> RnM d (Maybe (Module, ParsedIface))
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-readIface file_path
- = ioToRnMG (hGetStringBuffer file_path) `thenRn` \ read_result ->
---OLD: = ioToRnMG (readFile file_path) `thenRn` \ read_result ->
+readIface the_mod file_path
+ = ioToRnM (hGetStringBuffer False file_path) `thenRn` \ read_result ->
case read_result of
- Right contents -> case parseIface contents of
- Failed err -> --ioToRnMG (freeStringBuffer contents) `thenRn` \ _ ->
- failWithRn Nothing err
- Succeeded iface -> --ioToRnMG (freeStringBuffer contents) `thenRn` \ _ ->
- returnRn (Just iface)
-
-#if __GLASGOW_HASKELL__ >= 202
- Left err ->
- if isDoesNotExistError err then
- returnRn Nothing
- else
- failWithRn Nothing (cannaeReadFile file_path err)
-#else /* 2.01 and 0.2x */
- Left (NoSuchThing _) -> returnRn Nothing
-
- Left err -> failWithRn Nothing
- (cannaeReadFile file_path err)
-#endif
-
-\end{code}
-
-mkSearchPath takes a string consisting of a colon-separated list of directories and corresponding
-suffixes, and turns it into a list of (directory, suffix) pairs. For example:
-
-\begin{verbatim}
- mkSearchPath "foo%.hi:.%.p_hi:baz%.mc_hi" = [("foo",".hi"),( ".", ".p_hi"), ("baz",".mc_hi")]
-\begin{verbatim}
-
-\begin{code}
-mkSearchPath :: Maybe String -> SearchPath
-mkSearchPath Nothing = [(".",".hi")]
-mkSearchPath (Just s)
- = go s
- where
- go "" = []
- go s =
- case span (/= '%') s of
- (dir,'%':rs) ->
- case span (/= ':') rs of
- (hisuf,_:rest) -> (dir,hisuf):go rest
- (hisuf,[]) -> [(dir,hisuf)]
+ Right contents ->
+ case parseIface contents
+ PState{ bol = 0#, atbol = 1#,
+ context = [],
+ glasgow_exts = 1#,
+ loc = mkSrcLoc (mkFastString file_path) 1 } of
+ PFailed err -> failWithRn Nothing err
+ POk _ (PIface mod_nm iface) ->
+ warnCheckRn (mod_nm == moduleName the_mod)
+ (hsep [ ptext SLIT("Something is amiss; requested module name")
+ , pprModule the_mod
+ , ptext SLIT("differs from name found in the interface file ")
+ , pprModuleName mod_nm
+ ]) `thenRn_`
+ returnRn (Just (the_mod, iface))
+
+ Left err
+ | isDoesNotExistError err -> returnRn Nothing
+ | otherwise -> failWithRn Nothing (cannaeReadFile file_path err)
\end{code}
%*********************************************************
-%* *
+%* *
\subsection{Errors}
-%* *
+%* *
%*********************************************************
\begin{code}
-noIfaceErr filename sty
- = hcat [ptext SLIT("Could not find valid interface file "), quotes (pprModule sty filename)]
--- , text " in"]) 4 (vcat (map text dirs))
-
-cannaeReadFile file err sty
- = hcat [ptext SLIT("Failed in reading file: "), text file, ptext SLIT("; error="), text (show err)]
-
-getDeclErr name sty
- = sep [ptext SLIT("Failed to find interface decl for"), ppr sty name]
-
-getDeclWarn name sty
- = sep [ptext SLIT("Warning: failed to find (optional) interface decl for"), ppr sty name]
+noIfaceErr filename boot_file
+ = hsep [ptext SLIT("Could not find valid"), boot,
+ ptext SLIT("interface file"), quotes (pprModule filename)]
+ where
+ boot | boot_file = ptext SLIT("[boot]")
+ | otherwise = empty
+
+cannaeReadFile file err
+ = hcat [ptext SLIT("Failed in reading file: "),
+ text file,
+ ptext SLIT("; error="),
+ text (show err)]
+
+getDeclErr name
+ = ptext SLIT("Failed to find interface decl for") <+> quotes (ppr name)
+
+getDeclWarn name loc
+ = sep [ptext SLIT("Failed to find (optional) interface decl for") <+> quotes (ppr name),
+ ptext SLIT("desired at") <+> ppr loc]
+
+importDeclWarn mod name
+ = sep [ptext SLIT("Compiler tried to import decl from interface file with same name as module."),
+ ptext SLIT("(possible cause: module name clashes with interface file already in scope.)")
+ ] $$
+ hsep [ptext SLIT("Interface:"), quotes (pprModuleName mod),
+ comma, ptext SLIT("name:"), quotes (ppr name)]
+
+warnRedundantSourceImport mod_name
+ = ptext SLIT("Unnecessary {- SOURCE -} in the import of module") <+> quotes (pprModuleName mod_name)
\end{code}
projects / ghc-hetmet.git / blobdiff