\section[RnIfaces]{Cacheing and Renaming of Interfaces}
\begin{code}
-module RnIfaces (
- getInterfaceExports,
- getImportedInstDecls, getImportedRules,
- lookupFixity, loadHomeInterface,
- importDecl, recordSlurp,
- getImportVersions, getSlurped,
+module RnIfaces
+ (
+ findAndReadIface,
- checkUpToDate,
+ getInterfaceExports,
+ getImportedInstDecls, getImportedRules,
+ lookupFixityRn, loadHomeInterface,
+ importDecl, ImportDeclResult(..), recordLocalSlurps,
+ mkImportInfo, getSlurped,
getDeclBinders, getDeclSysBinders,
removeContext -- removeContext probably belongs somewhere else
- ) where
+ )
+where
#include "HsVersions.h"
-import CmdLineOpts ( opt_NoPruneDecls, opt_IgnoreIfacePragmas )
+import CmdLineOpts ( opt_NoPruneDecls, opt_NoPruneTyDecls, opt_IgnoreIfacePragmas )
+import HscTypes
import HsSyn ( HsDecl(..), TyClDecl(..), InstDecl(..), IfaceSig(..),
- HsType(..), ConDecl(..), IE(..), ConDetails(..), Sig(..),
- ForeignDecl(..), ForKind(..), isDynamic,
+ HsType(..), ConDecl(..),
+ ForeignDecl(..), ForKind(..), isDynamicExtName,
FixitySig(..), RuleDecl(..),
- isClassOpSig
+ tyClDeclNames
)
-import BasicTypes ( Version, NewOrData(..), defaultFixity )
-import RdrHsSyn ( RdrNameHsDecl, RdrNameInstDecl, RdrNameTyClDecl, RdrNameRuleDecl,
- extractHsTyRdrNames
- )
-import RnEnv ( mkImportedGlobalName, newImportedBinder, mkImportedGlobalFromRdrName,
- lookupOccRn, lookupImplicitOccRn,
- pprAvail,
- availName, availNames, addAvailToNameSet,
- FreeVars, emptyFVs
+import HsImpExp ( ImportDecl(..) )
+import BasicTypes ( Version, defaultFixity )
+import RdrHsSyn ( RdrNameHsDecl, RdrNameInstDecl, RdrNameRuleDecl,
+ extractHsTyRdrNames
)
+import RnEnv
import RnMonad
-import RnHsSyn ( RenamedHsDecl )
import ParseIface ( parseIface, IfaceStuff(..) )
-import FiniteMap ( FiniteMap, sizeFM, emptyFM, delFromFM, listToFM,
- lookupFM, addToFM, addToFM_C, addListToFM,
- fmToList, elemFM, foldFM
- )
-import Name ( Name {-instance NamedThing-},
- nameModule, isLocallyDefined,
- isWiredInName, nameUnique, NamedThing(..)
+import Name ( Name {-instance NamedThing-}, nameOccName,
+ nameModule, isLocallyDefined,
+ NamedThing(..),
+ mkNameEnv, elemNameEnv, extendNameEnv
)
-import Module ( Module, moduleString, pprModule,
- mkVanillaModule, pprModuleName,
- moduleUserString, moduleName, isLibModule,
+import Module ( Module, ModuleEnv,
+ moduleName, isModuleInThisPackage,
ModuleName, WhereFrom(..),
+ emptyModuleEnv, extendModuleEnv, lookupModuleEnvByName,
+ extendModuleEnv_C, lookupWithDefaultModuleEnv
)
import RdrName ( RdrName, rdrNameOcc )
import NameSet
-import Var ( Id )
import SrcLoc ( mkSrcLoc, SrcLoc )
-import PrelMods ( pREL_GHC )
-import PrelInfo ( cCallishTyKeys )
-import Bag
-import Maybes ( MaybeErr(..), maybeToBool, orElse )
-import ListSetOps ( unionLists )
-import Outputable
-import Unique ( Unique )
-import StringBuffer ( StringBuffer, hGetStringBuffer )
+import PrelInfo ( wiredInThingEnv )
+import Maybes ( maybeToBool, orElse )
+import StringBuffer ( hGetStringBuffer )
import FastString ( mkFastString )
import ErrUtils ( Message )
import Lex
+import FiniteMap
import Outputable
+import Bag
-import IO ( isDoesNotExistError )
-import List ( nub )
+import List ( nub )
\end{code}
\begin{code}
loadHomeInterface :: SDoc -> Name -> RnM d Ifaces
loadHomeInterface doc_str name
- = loadInterface doc_str (moduleName (nameModule name)) ImportBySystem `thenRn` \ (_, ifaces) ->
- returnRn ifaces
+ = loadInterface doc_str (moduleName (nameModule name)) ImportBySystem
loadOrphanModules :: [ModuleName] -> RnM d ()
loadOrphanModules mods
| null mods = returnRn ()
- | otherwise = traceRn (text "Loading orphan modules:" <+> fsep (map pprModuleName mods)) `thenRn_`
- mapRn_ load mods `thenRn_`
+ | otherwise = traceRn (text "Loading orphan modules:" <+>
+ fsep (map ppr mods)) `thenRn_`
+ mapRn_ load mods `thenRn_`
returnRn ()
where
- load mod = loadInterface (pprModuleName mod <+> ptext SLIT("is a orphan-instance module")) mod ImportBySystem
+ load mod = loadInterface (mk_doc mod) mod ImportBySystem
+ mk_doc mod = ppr mod <+> ptext SLIT("is a orphan-instance module")
+
+
+loadInterface :: SDoc -> ModuleName -> WhereFrom -> RnM d Ifaces
+loadInterface doc mod from
+ = tryLoadInterface doc mod from `thenRn` \ (ifaces, maybe_err) ->
+ case maybe_err of
+ Nothing -> returnRn ifaces
+ Just err -> failWithRn ifaces err
+
+tryLoadInterface :: SDoc -> ModuleName -> WhereFrom -> RnM d (Ifaces, Maybe Message)
+ -- Returns (Just err) if an error happened
+ -- Guarantees to return with iImpModInfo m --> (..., True)
+ -- (If the load fails, we plug in a vanilla placeholder)
+tryLoadInterface doc_str mod_name from
+ = getHomeIfaceTableRn `thenRn` \ hit ->
+ getIfacesRn `thenRn` \ ifaces ->
+
+ -- Check whether we have it already in the home package
+ case lookupModuleEnvByName hit mod_name of {
+ Just _ -> returnRn (ifaces, Nothing) ; -- In the home package
+ Nothing ->
-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_`
+ hi_boot_file
+ = case (from, mod_info) of
+ (ImportByUser, _) -> False -- Not hi-boot
+ (ImportByUserSource, _) -> True -- hi-boot
+ (ImportBySystem, Just (_, is_boot, _)) -> is_boot --
+ (ImportBySystem, Nothing) -> False
+ -- We're importing a module we know absolutely
+ -- nothing about, so we assume it's from
+ -- another package, where we aren't doing
+ -- dependency tracking. So it won't be a hi-boot file.
+
+ redundant_source_import
+ = case (from, mod_info) of
+ (ImportByUserSource, Just (_,False,_)) -> True
+ other -> False
+ in
-- CHECK WHETHER WE HAVE IT ALREADY
case mod_info of {
- Just (_, _, Just (load_mod, _, _))
+ Just (_, _, True)
-> -- We're read it already so don't re-read it
- returnRn (load_mod, ifaces) ;
+ returnRn (ifaces, Nothing) ;
- mod_map_result ->
+ _ ->
+
+ -- Issue a warning for a redundant {- SOURCE -} import
+ -- NB that we arrange to read all the ordinary imports before
+ -- any of the {- SOURCE -} imports
+ warnCheckRn (not redundant_source_import)
+ (warnRedundantSourceImport mod_name) `thenRn_`
-- READ THE MODULE IN
- findAndReadIface doc_str mod_name from in_map
- `thenRn` \ (hi_boot_read, read_result) ->
+ findAndReadIface doc_str mod_name hi_boot_file `thenRn` \ read_result ->
case read_result of {
- Nothing -> -- Not found, so add an empty export env to the Ifaces map
+ Left err -> -- Not found, so add an empty export env to the Ifaces map
-- so that we don't look again
let
- mod = mkVanillaModule mod_name
- new_mod_map = addToFM mod_map mod_name (0, False, Just (mod, False, []))
+ new_mod_map = addToFM mod_map mod_name (False, False, True)
new_ifaces = ifaces { iImpModInfo = new_mod_map }
in
setIfacesRn new_ifaces `thenRn_`
- failWithRn (mod, new_ifaces) (noIfaceErr mod hi_boot_read) ;
+ returnRn (new_ifaces, Just err) ;
-- Found and parsed!
- Just (mod, iface) ->
+ Right (mod, iface) ->
-- LOAD IT INTO Ifaces
-- 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
- 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 ->
- (if (opt_IgnoreIfacePragmas)
- then returnRn emptyBag
- else 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 ->
+
+ -- Sanity check. If we're system-importing a module we know nothing at all
+ -- about, it should be from a different package to this one
+ WARN( not (maybeToBool mod_info) &&
+ case from of { ImportBySystem -> True; other -> False } &&
+ isModuleInThisPackage mod,
+ ppr mod )
+
+ loadDecls mod (iDecls ifaces) (pi_decls iface) `thenRn` \ (decls_vers, new_decls) ->
+ loadRules mod (iRules ifaces) (pi_rules iface) `thenRn` \ (rule_vers, new_rules) ->
+ loadFixDecls mod_name (pi_fixity iface) `thenRn` \ fix_env ->
+ loadDeprecs mod (pi_deprecs iface) `thenRn` \ deprec_env ->
+ foldlRn (loadInstDecl mod) (iInsts ifaces) (pi_insts iface) `thenRn` \ new_insts ->
+ loadExports (pi_exports iface) `thenRn` \ (export_vers, avails) ->
let
+ version = VersionInfo { vers_module = pi_vers iface,
+ vers_exports = export_vers,
+ vers_rules = rule_vers,
+ vers_decls = decls_vers }
+
-- 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)
+ ImportByUser -> addModDeps mod (pi_usages iface) mod_map
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,
+ mod_map2 = addToFM mod_map1 mod_name (has_orphans, hi_boot_file, True)
+
+ -- Now add info about this module to the PIT
+ has_orphans = pi_orphan iface
+ new_pit = extendModuleEnv (iPIT ifaces) mod mod_iface
+ mod_iface = ModIface { mi_module = mod, mi_version = version,
+ mi_exports = avails, mi_orphan = has_orphans,
+ mi_fixities = fix_env, mi_deprecs = deprec_env,
+ mi_usages = [], -- Will be filled in later
+ mi_decls = panic "No mi_decls in PIT",
+ mi_globals = panic "No mi_globals in PIT"
+ }
+
+ new_ifaces = ifaces { iPIT = new_pit,
iDecls = new_decls,
- iFixes = new_fixities,
+ iInsts = new_insts,
iRules = new_rules,
- iInsts = new_insts }
+ iImpModInfo = mod_map2 }
in
setIfacesRn new_ifaces `thenRn_`
- returnRn (mod, new_ifaces)
- }}
-
-addModDeps :: Module -> ImportedModuleInfo
- -> [ImportVersion a] -> ImportedModuleInfo
-addModDeps mod mod_deps new_deps
- = foldr add mod_deps new_deps
+ returnRn (new_ifaces, Nothing)
+ }}}
+
+-----------------------------------------------------
+-- Adding module dependencies from the
+-- import decls in the interface file
+-----------------------------------------------------
+
+addModDeps :: Module -> [ImportVersion a]
+ -> ImportedModuleInfo -> ImportedModuleInfo
+-- (addModDeps M ivs deps)
+-- We are importing module M, and M.hi contains 'import' decls given by ivs
+addModDeps mod new_deps mod_deps
+ = foldr add mod_deps filtered_new_deps
where
- 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]
+ -- Don't record dependencies when importing a module from another package
+ -- Except for its descendents which contain orphans,
+ -- and in that case, forget about the boot indicator
+ filtered_new_deps :: [(ModuleName, (WhetherHasOrphans, IsBootInterface, IsLoaded))]
+ filtered_new_deps
+ | isModuleInThisPackage mod
+ = [ (imp_mod, (has_orphans, is_boot, False))
+ | (imp_mod, has_orphans, is_boot, _) <- new_deps
+ ]
+ | otherwise = [ (imp_mod, (True, False, False))
+ | (imp_mod, has_orphans, _, _) <- new_deps,
+ has_orphans
+ ]
+ add (imp_mod, dep) deps = addToFM_C combine deps imp_mod dep
+
+ combine old@(_, old_is_boot, old_is_loaded) new
+ | old_is_loaded || not old_is_boot = old -- Keep the old info if it's already loaded
+ -- or if it's a non-boot pending load
+ | otherwise = new -- Otherwise pick new info
+
+
+-----------------------------------------------------
+-- Loading the export list
+-----------------------------------------------------
+
+loadExports :: (Version, [ExportItem]) -> RnM d (Version, Avails)
+loadExports (vers, items)
+ = getModuleRn `thenRn` \ this_mod ->
+ mapRn (loadExport this_mod) items `thenRn` \ avails_s ->
+ returnRn (vers, concat avails_s)
+
+
+loadExport :: Module -> ExportItem -> RnM d [AvailInfo]
loadExport this_mod (mod, entities)
- | mod == this_mod = returnRn []
+ | mod == moduleName 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
| otherwise
= mapRn (load_entity mod) entities
where
- new_name mod occ = mkImportedGlobalName mod occ
+ new_name mod occ = newGlobalName mod occ
load_entity mod (Avail occ)
= new_name mod occ `thenRn` \ name ->
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
+-----------------------------------------------------
+-- Loading type/class/value decls
+-----------------------------------------------------
- -- Ignore the other sorts of decl
-loadFixDecl mod_name fixity_env other_decl = returnRn fixity_env
+loadDecls :: Module
+ -> DeclsMap
+ -> [(Version, RdrNameHsDecl)]
+ -> RnM d (NameEnv Version, DeclsMap)
+loadDecls mod decls_map decls
+ = foldlRn (loadDecl mod) (emptyNameEnv, decls_map) decls
loadDecl :: Module
- -> DeclsMap
+ -> (NameEnv Version, DeclsMap)
-> (Version, RdrNameHsDecl)
- -> RnM d DeclsMap
-
-loadDecl mod decls_map (version, decl)
+ -> RnM d (NameEnv Version, DeclsMap)
+loadDecl mod (version_map, decls_map) (version, decl)
= getDeclBinders new_name decl `thenRn` \ maybe_avail ->
case maybe_avail of {
- Nothing -> returnRn decls_map; -- No bindings
- Just avail ->
+ Nothing -> returnRn (version_map, decls_map); -- No bindings
+ Just avail ->
getDeclSysBinders new_name decl `thenRn` \ sys_bndrs ->
let
+ full_avail = addSysAvails avail sys_bndrs
+ -- Add the sys-binders to avail. When we import the decl,
+ -- it's full_avail that will get added to the 'already-slurped' set (iSlurp)
+ -- If we miss out sys-binders, we'll read the decl multiple times!
+
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]
+ [ (name, (full_avail, name==main_name, (mod, decl')))
+ | name <- availNames full_avail]
add_decl decls_map (name, stuff)
= WARN( name `elemNameEnv` decls_map, ppr name )
- addToNameEnv decls_map name stuff
+ extendNameEnv decls_map name stuff
+
+ new_version_map = extendNameEnv version_map main_name version
in
- returnRn new_decls_map
+ returnRn (new_version_map, new_decls_map)
}
where
- -- newImportedBinder puts into the cache the binder with the
+ -- newTopBinder 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
+ -- There maybe occurrences that don't have the correct Module, but
+ -- by the typechecker will propagate the binding definition to all
+ -- the occurrences, so that doesn't matter
+ new_name rdr_name loc = newTopBinder mod rdr_name loc
{-
If a signature decl is being loaded, and optIgnoreIfacePragmas is on,
-> SigD (IfaceSig name tp [] loc)
other -> decl
+-----------------------------------------------------
+-- Loading fixity decls
+-----------------------------------------------------
+
+loadFixDecls mod_name decls
+ = mapRn (loadFixDecl mod_name) decls `thenRn` \ to_add ->
+ returnRn (mkNameEnv to_add)
+
+loadFixDecl mod_name sig@(FixitySig rdr_name fixity loc)
+ = newGlobalName mod_name (rdrNameOcc rdr_name) `thenRn` \ name ->
+ returnRn (name, fixity)
+
+
+-----------------------------------------------------
+-- Loading instance decls
+-----------------------------------------------------
+
loadInstDecl :: Module
- -> Bag GatedDecl
+ -> IfaceInsts
-> RdrNameInstDecl
- -> RnM d (Bag GatedDecl)
+ -> RnM d IfaceInsts
loadInstDecl mod insts decl@(InstDecl inst_ty binds uprags dfun_name src_loc)
=
-- Find out what type constructors and classes are "gates" for the
munged_inst_ty = removeContext inst_ty
free_names = extractHsTyRdrNames munged_inst_ty
in
- setModuleRn (moduleName mod) $
- mapRn mkImportedGlobalFromRdrName free_names `thenRn` \ gate_names ->
+ setModuleRn mod $
+ mapRn lookupOrigName free_names `thenRn` \ gate_names ->
returnRn ((mkNameSet gate_names, (mod, InstD decl)) `consBag` insts)
removeContext (HsForAllTy tvs cxt ty) = HsForAllTy tvs [] (removeFuns ty)
removeContext ty = removeFuns ty
-removeFuns (MonoFunTy _ ty) = removeFuns ty
+removeFuns (HsFunTy _ 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}
-
-
-%********************************************************
-%* *
-\subsection{Loading usage information}
-%* *
-%********************************************************
-
-\begin{code}
-checkUpToDate :: ModuleName -> RnMG Bool -- True <=> no need to recompile
-checkUpToDate mod_name
- = 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"),
- pprModuleName mod_name]) `thenRn_`
- returnRn False
-
- Just (_, iface)
- -> -- Found it, so now check it
- checkModUsage (pi_usages iface)
- where
- -- Only look in current directory, with suffix .hi
- doc_str = sep [ptext SLIT("need usage info from"), pprModuleName mod_name]
-
-checkModUsage [] = returnRn True -- Yes! Everything is up to date!
-
-checkModUsage ((mod_name, old_mod_vers, _, Specifically []) : rest)
- -- If CurrentModule.hi contains
- -- import Foo :: ;
- -- then that simply records that Foo lies below CurrentModule in the
- -- hierarchy, but CurrentModule doesn't depend in any way on Foo.
- -- In this case we don't even want to open Foo's interface.
- = traceRn (ptext SLIT("Nothing used from:") <+> ppr mod_name) `thenRn_`
- checkModUsage rest -- This one's ok, so check the rest
-
-checkModUsage ((mod_name, old_mod_vers, _, whats_imported) : rest)
- = loadInterface doc_str mod_name ImportBySystem `thenRn` \ (mod, ifaces) ->
- let
- maybe_mod_vers = case lookupFM (iImpModInfo ifaces) mod_name of
- Just (version, _, Just (_, _, _)) -> Just version
- other -> Nothing
- in
- 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:"), pprModuleName mod_name])
- `thenRn_` checkModUsage rest
- else
- traceRn (sep [ptext SLIT("Module version has changed:"), pprModuleName mod_name])
- `thenRn_`
- -- 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"), pprModuleName mod_name]
-
-
-checkEntityUsage mod decls []
- = returnRn True -- Yes! All up to date!
-
-checkEntityUsage mod decls ((occ_name,old_vers) : rest)
- = 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("No longer exported:"), ppr name])
- `thenRn_` returnRn False
+-----------------------------------------------------
+-- Loading Rules
+-----------------------------------------------------
- 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
+loadRules :: Module -> IfaceRules
+ -> (Version, [RdrNameRuleDecl])
+ -> RnM d (Version, IfaceRules)
+loadRules mod rule_bag (version, rules)
+ | null rules || opt_IgnoreIfacePragmas
+ = returnRn (version, rule_bag)
+ | otherwise
+ = setModuleRn mod $
+ mapRn (loadRule mod) rules `thenRn` \ new_rules ->
+ returnRn (version, rule_bag `unionBags` listToBag new_rules)
- | otherwise
- -- Out of date, so bale out
- -> traceRn (sep [ptext SLIT("Out of date:"), ppr name]) `thenRn_`
- returnRn False
+loadRule :: Module -> RdrNameRuleDecl -> RnM d GatedDecl
+-- "Gate" the rule simply by whether the rule variable is
+-- needed. We can refine this later.
+loadRule mod decl@(IfaceRule _ _ var _ _ src_loc)
+ = lookupOrigName var `thenRn` \ var_name ->
+ returnRn (unitNameSet var_name, (mod, RuleD decl))
+
+
+-----------------------------------------------------
+-- Loading Deprecations
+-----------------------------------------------------
+
+loadDeprecs :: Module -> IfaceDeprecs -> RnM d Deprecations
+loadDeprecs m Nothing = returnRn NoDeprecs
+loadDeprecs m (Just (Left txt)) = returnRn (DeprecAll txt)
+loadDeprecs m (Just (Right prs)) = setModuleRn m $
+ foldlRn loadDeprec emptyNameEnv prs `thenRn` \ env ->
+ returnRn (DeprecSome env)
+loadDeprec deprec_env (n, txt)
+ = lookupOrigName n `thenRn` \ name ->
+ traceRn (text "Loaded deprecation(s) for" <+> ppr name <> colon <+> ppr txt) `thenRn_`
+ returnRn (extendNameEnv deprec_env name txt)
\end{code}
%*********************************************************
\begin{code}
-importDecl :: Name -> RnMG (Maybe (Module, RdrNameHsDecl))
- -- Returns Nothing for
- -- (a) wired in name
- -- (b) local decl
- -- (c) already slurped
+importDecl :: Name -> RnMG ImportDeclResult
+
+data ImportDeclResult
+ = AlreadySlurped
+ | WiredIn
+ | Deferred
+ | HereItIs (Module, RdrNameHsDecl)
importDecl name
- | isWiredInName name
- = returnRn Nothing
- | otherwise
- = getSlurped `thenRn` \ already_slurped ->
- if name `elemNameSet` already_slurped then
- returnRn Nothing -- Already dealt with
+ = -- Check if it was loaded before beginning this module
+ checkAlreadyAvailable name `thenRn` \ done ->
+ if done then
+ returnRn AlreadySlurped
else
- if isLocallyDefined name then -- Don't bring in decls from
- -- the renamed module's own interface file
- addWarnRn (importDeclWarn name) `thenRn_`
- returnRn Nothing
- else
- getNonWiredInDecl name
-\end{code}
-\begin{code}
-getNonWiredInDecl :: Name -> RnMG (Maybe (Module, RdrNameHsDecl))
+ -- Check if we slurped it in while compiling this module
+ getIfacesRn `thenRn` \ ifaces ->
+ if name `elemNameSet` iSlurp ifaces then
+ returnRn AlreadySlurped
+ else
+
+ -- Don't slurp in decls from this module's own interface file
+ -- (Indeed, this shouldn't happen.)
+ if isLocallyDefined name then
+ addWarnRn (importDeclWarn name) `thenRn_`
+ returnRn AlreadySlurped
+ else
+
+ -- When we find a wired-in name we must load its home
+ -- module so that we find any instance decls lurking therein
+ if name `elemNameEnv` wiredInThingEnv then
+ loadHomeInterface doc name `thenRn_`
+ returnRn WiredIn
+
+ else getNonWiredInDecl name
+ where
+ doc = ptext SLIT("need home module for wired in thing") <+> ppr name
+
+getNonWiredInDecl :: Name -> RnMG ImportDeclResult
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
+{- OMIT DEFERRED STUFF FOR NOW, TILL GHCI WORKS
+ Just (version, avail, is_tycon_name, decl@(_, TyClD (TyData DataType _ _ _ _ ncons _ _ _ _)))
+ -- This case deals with deferred import of algebraic data types
+
+ | not opt_NoPruneTyDecls
+
+ && (opt_IgnoreIfacePragmas || ncons > 1)
+ -- We only defer if imported interface pragmas are ingored
+ -- or if it's not a product type.
+ -- Sole reason: The wrapper for a strict function may need to look
+ -- inside its arg, and hence need to see its arg type's constructors.
+
+ && not (getUnique tycon_name `elem` cCallishTyKeys)
+ -- Never defer ccall types; we have to unbox them,
+ -- and importing them does no harm
+
+
+ -> -- OK, so we're importing a deferrable data type
+ if needed_name == tycon_name
+ -- The needed_name is the TyCon of a data type decl
+ -- Record that it's slurped, put it in the deferred set
+ -- and don't return a declaration at all
+ setIfacesRn (recordSlurp (ifaces {iDeferred = iDeferred ifaces
+ `addOneToNameSet` tycon_name})
+ version (AvailTC needed_name [needed_name])) `thenRn_`
+ returnRn Deferred
+
+ else
+ -- The needed name is a constructor of a data type decl,
+ -- getting a constructor, so remove the TyCon from the deferred set
+ -- (if it's there) and return the full declaration
+ setIfacesRn (recordSlurp (ifaces {iDeferred = iDeferred ifaces
+ `delFromNameSet` tycon_name})
+ version avail) `thenRn_`
+ returnRn (HereItIs decl)
+ where
+ tycon_name = availName avail
+-}
+
+ Just (avail,_,decl)
+ -> setIfacesRn (recordSlurp ifaces avail) `thenRn_`
+ returnRn (HereItIs decl)
+
+ Nothing
-> addErrRn (getDeclErr needed_name) `thenRn_`
- returnRn Nothing
+ returnRn AlreadySlurped
where
doc_str = ptext SLIT("need decl for") <+> ppr needed_name
+
+{- OMIT FOR NOW
+getDeferredDecls :: RnMG [(Module, RdrNameHsDecl)]
+getDeferredDecls
+ = getIfacesRn `thenRn` \ ifaces ->
+ let
+ decls_map = iDecls ifaces
+ deferred_names = nameSetToList (iDeferred ifaces)
+ get_abstract_decl n = case lookupNameEnv decls_map n of
+ Just (_, _, _, decl) -> decl
+ in
+ traceRn (sep [text "getDeferredDecls", nest 4 (fsep (map ppr deferred_names))]) `thenRn_`
+ returnRn (map get_abstract_decl deferred_names)
+-}
\end{code}
@getWiredInDecl@ maps a wired-in @Name@ to what it makes available.
\begin{code}
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 (mod, [])
-
- Just (_, _, Just (mod, _, avails)) -> returnRn (mod, avails)
- where
- doc_str = sep [pprModuleName mod_name, ptext SLIT("is directly imported")]
+ = getHomeIfaceTableRn `thenRn` \ hit ->
+ case lookupModuleEnvByName hit mod_name of {
+ Just mi -> returnRn (mi_module mi, mi_exports mi) ;
+ Nothing ->
+
+ loadInterface doc_str mod_name from `thenRn` \ ifaces ->
+ case lookupModuleEnvByName (iPIT ifaces) mod_name of
+ Just mi -> returnRn (mi_module mi, mi_exports mi) ;
+ -- loadInterface always puts something in the map
+ -- even if it's a fake
+ Nothing -> pprPanic "getInterfaceExports" (ppr mod_name)
+ }
+ where
+ doc_str = sep [ppr mod_name, ptext SLIT("is directly imported")]
\end{code}
getIfacesRn `thenRn` \ ifaces ->
let
orphan_mods =
- [mod | (mod, (_, True, Nothing)) <- fmToList (iImpModInfo ifaces)]
+ [mod | (mod, (True, _, False)) <- fmToList (iImpModInfo ifaces)]
in
loadOrphanModules orphan_mods `thenRn_`
where
gate_list = nameSetToList gates
- load_home gate | isLocallyDefined gate
- = returnRn ()
- | otherwise
- = loadHomeInterface (ppr gate <+> text "is an instance gate") gate `thenRn_`
- returnRn ()
-
ppr_brief_inst_decl (mod, InstD (InstDecl inst_ty _ _ _ _))
= case inst_ty of
HsForAllTy _ _ tau -> ppr tau
= getIfacesRn `thenRn` \ ifaces ->
let
gates = iSlurp ifaces -- Anything at all that's been slurped
- (decls, new_rules) = selectGated gates (iRules ifaces)
+ rules = iRules ifaces
+ (decls, new_rules) = selectGated gates rules
in
- setIfacesRn (ifaces { iRules = new_rules }) `thenRn_`
+ if null decls then
+ returnRn []
+ else
+ setIfacesRn (ifaces { iRules = new_rules }) `thenRn_`
traceRn (sep [text "getImportedRules:",
- text "Slurped" <+> int (length decls) <+> text "rules"]) `thenRn_`
+ text "Slurped" <+> int (length decls) <+> text "rules"]) `thenRn_`
returnRn decls
selectGated gates decl_bag
| isEmptyNameSet (reqd `minusNameSet` gates) = (decl:yes, no)
| otherwise = (yes, (reqd,decl) `consBag` no)
-lookupFixity :: Name -> RnMS Fixity
-lookupFixity name
+lookupFixityRn :: Name -> RnMS Fixity
+lookupFixityRn name
| isLocallyDefined name
= getFixityEnv `thenRn` \ local_fix_env ->
- case lookupNameEnv local_fix_env name of
- Just (FixitySig _ fix _) -> returnRn fix
- Nothing -> returnRn defaultFixity
+ returnRn (lookupLocalFixity local_fix_env name)
| otherwise -- Imported
-- For imported names, we have to get their fixities by doing a loadHomeInterface,
-- right away (after all, it's possible that nothing from B will be used).
-- When we come across a use of 'f', we need to know its fixity, and it's then,
-- and only then, that we load B.hi. That is what's happening here.
- = loadHomeInterface doc name `thenRn` \ ifaces ->
- case lookupNameEnv (iFixes ifaces) name of
- Just (FixitySig _ fix _) -> returnRn fix
- Nothing -> returnRn defaultFixity
+ = getHomeIfaceTableRn `thenRn` \ hit ->
+ loadHomeInterface doc name `thenRn` \ ifaces ->
+ case lookupTable hit (iPIT ifaces) name of
+ Just iface -> returnRn (lookupNameEnv (mi_fixities iface) name `orElse` defaultFixity)
+ Nothing -> returnRn defaultFixity
where
doc = ptext SLIT("Checking fixity for") <+> ppr name
\end{code}
things it uses. It records:
\begin{itemize}
-\item anything reachable from its body code
-\item any module exported with a @module Foo@.
+\item (a) anything reachable from its body code
+\item (b) any module exported with a @module Foo@
+\item (c) anything reachable from an exported item
\end{itemize}
-%
-Why the latter? Because if @Foo@ changes then this module's export list
+
+Why (b)? Because if @Foo@ changes then this module's export list
will change, so we must recompile this module at least as far as
making a new interface file --- but in practice that means complete
recompilation.
-What about this?
+Why (c)? Consider this:
\begin{verbatim}
module A( f, g ) where | module B( f ) where
import B( f ) | f = h 3
g = ... | h = ...
\end{verbatim}
-Should we record @B.f@ in @A@'s usages? In fact we don't. Certainly,
-if anything about @B.f@ changes than anyone who imports @A@ should be
-recompiled; they'll get an early exit if they don't use @B.f@.
-However, even if @B.f@ doesn't change at all, @B.h@ may do so, and
-this change may not be reflected in @f@'s version number. So there
-are two things going on when compiling module @A@:
-
-\begin{enumerate}
-\item Are @A.o@ and @A.hi@ correct? Then we can bale out early.
-\item Should modules that import @A@ be recompiled?
-\end{enumerate}
-
-For (1) it is slightly harmful to record @B.f@ in @A@'s usages,
-because a change in @B.f@'s version will provoke full recompilation of
-@A@, producing an identical @A.o@, and @A.hi@ differing only in its
-usage-version of @B.f@ (and this usage-version info isn't used by any
-importer).
-
-For (2), because of the tricky @B.h@ question above, we ensure that
-@A.hi@ is touched (even if identical to its previous version) if A's
-recompilation was triggered by an imported @.hi@ file date change.
-Given that, there's no need to record @B.f@ in @A@'s usages.
-
-On the other hand, if @A@ exports @module B@, then we {\em do} count
-@module B@ among @A@'s usages, because we must recompile @A@ to ensure
-that @A.hi@ changes appropriately.
-
-HOWEVER, we *do* record the usage
- import B <n> :: ;
+Here, @B.f@ isn't used in A. Should we nevertheless record @B.f@ in
+@A@'s usages? Our idea is that we aren't going to touch A.hi if it is
+*identical* to what it was before. If anything about @B.f@ changes
+than anyone who imports @A@ should be recompiled in case they use
+@B.f@ (they'll get an early exit if they don't). So, if anything
+about @B.f@ changes we'd better make sure that something in A.hi
+changes, and the convenient way to do that is to record the version
+number @B.f@ in A.hi in the usage list. If B.f changes that'll force a
+complete recompiation of A, which is overkill but it's the only way to
+write a new, slightly different, A.hi.
+
+But the example is tricker. Even if @B.f@ doesn't change at all,
+@B.h@ may do so, and this change may not be reflected in @f@'s version
+number. But with -O, a module that imports A must be recompiled if
+@B.h@ changes! So A must record a dependency on @B.h@. So we treat
+the occurrence of @B.f@ in the export list *just as if* it were in the
+code of A, and thereby haul in all the stuff reachable from it.
+
+[NB: If B was compiled with -O, but A isn't, we should really *still*
+haul in all the unfoldings for B, in case the module that imports A *is*
+compiled with -O. I think this is the case.]
+
+Even if B is used at all we get a usage line for B
+ import B <n> :: ... ;
in A.hi, to record the fact that A does import B. This is used to decide
to look to look for B.hi rather than B.hi-boot when compiling a module that
imports A. This line says that A imports B, but uses nothing in it.
So we'll get an early bale-out when compiling A if B's version changes.
\begin{code}
-getImportVersions :: ModuleName -- Name of this module
- -> ExportEnv -- Info about exports
- -> RnMG (VersionInfo Name) -- Version info for these names
+mkImportInfo :: ModuleName -- Name of this module
+ -> [ImportDecl n] -- The import decls
+ -> RnMG [ImportVersion Name]
-getImportVersions this_mod (ExportEnv export_avails _ export_all_mods)
+mkImportInfo this_mod imports
= getIfacesRn `thenRn` \ ifaces ->
+ getHomeIfaceTableRn `thenRn` \ hit ->
let
+ import_all_mods :: [ModuleName]
+ -- Modules where we imported all the names
+ -- (apart from hiding some, perhaps)
+ import_all_mods = nub [ m | ImportDecl m _ _ _ imp_list _ <- imports,
+ import_all imp_list ]
+
+ import_all (Just (False, _)) = False -- Imports are specified explicitly
+ import_all other = True -- Everything is imported
+
mod_map = iImpModInfo ifaces
imp_names = iVSlurp ifaces
+ pit = iPIT ifaces
-- mv_map groups together all the things imported from a particular module.
- mv_map :: FiniteMap ModuleName [(Name,Version)]
- mv_map = foldr add_mv emptyFM imp_names
+ mv_map :: ModuleEnv [Name]
+ mv_map = foldr add_mv emptyModuleEnv imp_names
+
+ add_mv name mv_map = addItem mv_map (nameModule name) name
-- Build the result list by adding info for each module.
-- For (a) a library module, we don't record it at all unless it contains orphans
-- whether something is a boot file along with the usage info for it, but
-- I can't be bothered just now.
- mk_version_info mod_name (version, has_orphans, contents) so_far
- = let
- go_for_it exports = (mod_name, version, has_orphans, exports) : so_far
- in
- case contents of
- Nothing -> -- We didn't even open the interface
- -- This happens when a module, Foo, that we explicitly imported has
+ mk_imp_info mod_name (has_orphans, is_boot, opened) so_far
+ | mod_name == this_mod -- Check if M appears in the set of modules 'below' M
+ -- This seems like a convenient place to check
+ = WARN( not is_boot, ptext SLIT("Wierd:") <+> ppr this_mod <+>
+ ptext SLIT("imports itself (perhaps indirectly)") )
+ so_far
+
+ | not opened -- We didn't even open the interface
+ = -- This happens when a module, Foo, that we explicitly imported has
-- 'import Baz' in its interface file, recording that Baz is below
-- Foo in the module dependency hierarchy. We want to propagate this
-- information. The Nothing says that we didn't even open the interface
- -- file but we must still propagate the dependeny info.
- go_for_it (Specifically [])
+ -- file but we must still propagate the dependency info.
+ -- The module in question must be a local module (in the same package)
+ go_for_it NothingAtAll
- Just (mod, boot_import, _) -- We did open the interface
- | boot_import -- Don't record any usage info for this module
- || (is_lib_module && not has_orphans)
- -> so_far
+
+ | is_lib_module && not has_orphans
+ = so_far
- | is_lib_module -- Record the module but not detailed
- || mod_name `elem` export_all_mods -- version information for the imports
- -> go_for_it Everything
-
- | otherwise
- -> case lookupFM mv_map mod_name of
- Just whats_imported -> go_for_it (Specifically whats_imported)
- Nothing -> go_for_it (Specifically [])
- -- This happens if you have
- -- import Foo
- -- but don't actually *use* anything from Foo
- -- In which case record an empty dependency list
- where
- is_lib_module = isLibModule mod
-
+ | is_lib_module -- Record the module version only
+ = go_for_it (Everything module_vers)
+
+ | otherwise
+ = go_for_it whats_imported
+
+ where
+ go_for_it exports = (mod_name, has_orphans, is_boot, exports) : so_far
+ mod_iface = lookupIface hit pit mod_name
+ mod = mi_module mod_iface
+ is_lib_module = not (isModuleInThisPackage mod)
+ version_info = mi_version mod_iface
+ version_env = vers_decls version_info
+ module_vers = vers_module version_info
+
+ whats_imported = Specifically module_vers
+ export_vers import_items
+ (vers_rules version_info)
+
+ import_items = [(n,v) | n <- lookupWithDefaultModuleEnv mv_map [] mod,
+ let v = lookupNameEnv version_env n `orElse`
+ pprPanic "mk_whats_imported" (ppr n)
+ ]
+ export_vers | moduleName mod `elem` import_all_mods
+ = Just (vers_exports version_info)
+ | otherwise
+ = Nothing
+
+ import_info = foldFM mk_imp_info [] mod_map
in
- -- A module shouldn't load its own interface
- -- This seems like a convenient place to check
- WARN( maybeToBool (lookupFM mod_map this_mod),
- ptext SLIT("Wierd:") <+> ppr this_mod <+> ptext SLIT("loads its own interface") )
+ traceRn (text "Modules in Ifaces: " <+> fsep (map ppr (keysFM mod_map))) `thenRn_`
+ returnRn import_info
- returnRn (foldFM mk_version_info [] mod_map)
- where
- add_mv v@(name, version) mv_map
- = addToFM_C add_item mv_map mod [v]
- where
- mod = moduleName (nameModule name)
- add_item vs _ = (v:vs)
+
+addItem :: ModuleEnv [a] -> Module -> a -> ModuleEnv [a]
+addItem fm mod x = extendModuleEnv_C add_item fm mod [x]
+ where
+ add_item xs _ = x:xs
\end{code}
\begin{code}
= getIfacesRn `thenRn` \ ifaces ->
returnRn (iSlurp ifaces)
-recordSlurp maybe_version avail
- = getIfacesRn `thenRn` \ ifaces@(Ifaces { iSlurp = slurped_names,
- iVSlurp = imp_names }) ->
- let
+recordSlurp ifaces@(Ifaces { iSlurp = slurped_names, iVSlurp = imp_names })
+ avail
+ = let
new_slurped_names = addAvailToNameSet slurped_names avail
+ new_imp_names = availName avail : imp_names
+ in
+ ifaces { iSlurp = new_slurped_names, iVSlurp = new_imp_names }
- new_imp_names = case maybe_version of
- Just version -> (availName avail, version) : imp_names
- Nothing -> imp_names
+recordLocalSlurps local_avails
+ = getIfacesRn `thenRn` \ ifaces ->
+ let
+ new_slurped_names = foldl addAvailToNameSet (iSlurp ifaces) local_avails
in
- setIfacesRn (ifaces { iSlurp = new_slurped_names,
- iVSlurp = new_imp_names })
+ setIfacesRn (ifaces { iSlurp = new_slurped_names })
\end{code}
-> RdrNameHsDecl
-> RnM d (Maybe AvailInfo)
-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 (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 (TyClD (TySynonym tycon _ _ src_loc))
- = new_name tycon src_loc `thenRn` \ tycon_name ->
- returnRn (Just (AvailTC tycon_name [tycon_name]))
-
-getDeclBinders new_name (TyClD (ClassDecl _ cname _ _ sigs _ _ _ _ _ src_loc))
- = new_name cname src_loc `thenRn` \ class_name ->
-
- -- 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 (TyClD tycl_decl)
+ = mapRn do_one (tyClDeclNames tycl_decl) `thenRn` \ (main_name:sub_names) ->
+ returnRn (Just (AvailTC main_name (main_name : sub_names)))
+ where
+ do_one (name,loc) = new_name name loc
getDeclBinders new_name (SigD (IfaceSig var ty prags src_loc))
= new_name var src_loc `thenRn` \ var_name ->
returnRn (Just (Avail var_name))
-getDeclBinders new_name (FixD _) = returnRn Nothing
-
-- foreign declarations
getDeclBinders new_name (ForD (ForeignDecl nm kind _ dyn _ loc))
| binds_haskell_name kind dyn
= new_name nm loc `thenRn` \ name ->
returnRn (Just (Avail name))
- | otherwise -- a foreign export
- = lookupImplicitOccRn nm `thenRn_`
+ | otherwise -- a foreign export
+ = lookupOrigName nm `thenRn_`
returnRn Nothing
-getDeclBinders new_name (DefD _) = returnRn Nothing
-getDeclBinders new_name (InstD _) = returnRn Nothing
-getDeclBinders new_name (RuleD _) = returnRn Nothing
+getDeclBinders new_name (FixD _) = returnRn Nothing
+getDeclBinders new_name (DeprecD _) = returnRn Nothing
+getDeclBinders new_name (DefD _) = returnRn Nothing
+getDeclBinders new_name (InstD _) = returnRn Nothing
+getDeclBinders new_name (RuleD _) = returnRn Nothing
binds_haskell_name (FoImport _) _ = True
binds_haskell_name FoLabel _ = True
-binds_haskell_name FoExport ext_nm = isDynamic ext_nm
-
-----------------
-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 _ _ 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 (nn ++ ns)
-
-getConFieldNames new_name [] = returnRn []
-
-getClassOpNames new_name (ClassOpSig op _ _ _ src_loc) = new_name op src_loc
+binds_haskell_name FoExport ext_nm = isDynamicExtName ext_nm
\end{code}
@getDeclSysBinders@ gets the implicit binders introduced by a decl.
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 (TyClD (ClassDecl _ cname _ _ sigs _ names src_loc))
+ = sequenceRn [new_name n src_loc | n <- names]
+
+getDeclSysBinders new_name (TyClD (TyData _ _ _ _ cons _ _ _ _ _))
+ = sequenceRn [new_name wkr_name src_loc | ConDecl _ wkr_name _ _ _ src_loc <- cons]
getDeclSysBinders new_name other_decl
= returnRn []
%*********************************************************
\begin{code}
-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
+findAndReadIface :: SDoc -> ModuleName
+ -> IsBootInterface -- True <=> Look for a .hi-boot file
+ -- False <=> Look for .hi file
+ -> RnM d (Either Message (Module, ParsedIface))
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-findAndReadIface doc_str mod_name from hi_file
+findAndReadIface doc_str mod_name hi_boot_file
= traceRn trace_msg `thenRn_`
-- 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 ->
+ getFinderRn `thenRn` \ finder ->
+ ioToRnM (finder mod_name) `thenRn` \ maybe_found ->
+
+ case maybe_found of
+ Right (Just (mod,locn))
+ | hi_boot_file -> readIface mod (hi_file locn ++ "-hi-boot")
+ | otherwise -> readIface mod (hi_file locn)
- 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
- 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)
+ -- Can't find it
+ other -> traceRn (ptext SLIT("...not found")) `thenRn_`
+ returnRn (Left (noIfaceErr mod_name hi_boot_file))
+ where
trace_msg = sep [hsep [ptext SLIT("Reading"),
- ppr from,
+ if hi_boot_file then ptext SLIT("[boot]") else empty,
ptext SLIT("interface for"),
- pprModuleName mod_name <> semi],
+ ppr mod_name <> semi],
nest 4 (ptext SLIT("reason:") <+> doc_str)]
\end{code}
@readIface@ tries just the one file.
\begin{code}
-readIface :: Module -> String -> RnM d (Maybe (Module, ParsedIface))
+readIface :: Module -> String -> RnM d (Either Message (Module, ParsedIface))
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-readIface the_mod file_path
- = ioToRnM (hGetStringBuffer False file_path) `thenRn` \ read_result ->
+readIface wanted_mod file_path
+ = traceRn (ptext SLIT("...reading from") <+> text file_path) `thenRn_`
+ ioToRnM (hGetStringBuffer False file_path) `thenRn` \ read_result ->
case read_result of
Right contents ->
case parseIface contents
context = [],
glasgow_exts = 1#,
loc = mkSrcLoc (mkFastString file_path) 1 } of
- POk _ (PIface mod_nm iface) ->
- warnCheckRn (mod_nm == moduleName the_mod)
- (hiModuleNameMismatchWarn the_mod mod_nm) `thenRn_`
- returnRn (Just (the_mod, iface))
-
- PFailed err -> failWithRn Nothing err
- other -> failWithRn Nothing (ptext SLIT("Unrecognisable interface file"))
- -- This last case can happen if the interface file is (say) empty
- -- in which case the parser thinks it looks like an IdInfo or
- -- something like that. Just an artefact of the fact that the
- -- parser is used for several purposes at once.
-
- Left err
- | isDoesNotExistError err -> returnRn Nothing
- | otherwise -> failWithRn Nothing (cannaeReadFile file_path err)
+ POk _ (PIface iface) ->
+ warnCheckRn (wanted_mod == read_mod)
+ (hiModuleNameMismatchWarn wanted_mod read_mod) `thenRn_`
+ returnRn (Right (wanted_mod, iface))
+ where
+ read_mod = pi_mod iface
+
+ PFailed err -> bale_out err
+ parse_result -> bale_out empty
+ -- This last case can happen if the interface file is (say) empty
+ -- in which case the parser thinks it looks like an IdInfo or
+ -- something like that. Just an artefact of the fact that the
+ -- parser is used for several purposes at once.
+
+ Left io_err -> bale_out (text (show io_err))
+ where
+ bale_out err = returnRn (Left (badIfaceFile file_path err))
\end{code}
%*********************************************************
%*********************************************************
\begin{code}
-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
+noIfaceErr mod_name boot_file
+ = ptext SLIT("Could not find interface file for") <+> quotes (ppr mod_name)
+ -- We used to print the search path, but we can't do that
+ -- now, becuase it's hidden inside the finder.
+ -- Maybe the finder should expose more functions.
-cannaeReadFile file err
- = hcat [ptext SLIT("Failed in reading file: "),
- text file,
- ptext SLIT("; error="),
- text (show err)]
+badIfaceFile file err
+ = vcat [ptext SLIT("Bad interface file:") <+> text file,
+ nest 4 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]
+ = vcat [ptext SLIT("Failed to find interface decl for") <+> quotes (ppr name),
+ ptext SLIT("from module") <+> quotes (ppr (nameModule name))
+ ]
importDeclWarn name
= sep [ptext SLIT(
warnRedundantSourceImport mod_name
= ptext SLIT("Unnecessary {- SOURCE -} in the import of module")
- <+> quotes (pprModuleName mod_name)
+ <+> quotes (ppr mod_name)
-hiModuleNameMismatchWarn :: Module -> ModuleName -> Message
-hiModuleNameMismatchWarn requested_mod mod_nm =
+hiModuleNameMismatchWarn :: Module -> Module -> Message
+hiModuleNameMismatchWarn requested_mod read_mod =
hsep [ ptext SLIT("Something is amiss; requested module name")
- , pprModule requested_mod
- , ptext SLIT("differs from name found in the interface file ")
- , pprModuleName mod_nm
+ , ppr (moduleName requested_mod)
+ , ptext SLIT("differs from name found in the interface file")
+ , ppr read_mod
]
\end{code}
projects / ghc-hetmet.git / blobdiff