\begin{code}
module RnIfaces (
- getInterfaceExports,
+ findAndReadIface,
+
+ getInterfaceExports, getDeferredDecls,
getImportedInstDecls, getImportedRules,
- lookupFixity, loadHomeInterface,
- importDecl, recordSlurp,
- getImportVersions, getSlurped,
+ lookupFixityRn, loadHomeInterface,
+ importDecl, ImportDeclResult(..), recordLocalSlurps, loadBuiltinRules,
+ mkImportExportInfo, getSlurped,
- checkUpToDate,
+ checkModUsage, outOfDate, upToDate,
getDeclBinders, getDeclSysBinders,
removeContext -- removeContext probably belongs somewhere else
#include "HsVersions.h"
-import CmdLineOpts ( opt_NoPruneDecls, opt_IgnoreIfacePragmas )
+import CmdLineOpts ( opt_NoPruneDecls, opt_NoPruneTyDecls, opt_IgnoreIfacePragmas )
import HsSyn ( HsDecl(..), TyClDecl(..), InstDecl(..), IfaceSig(..),
HsType(..), ConDecl(..), IE(..), ConDetails(..), Sig(..),
- ForeignDecl(..), ForKind(..), isDynamic,
+ ForeignDecl(..), ForKind(..), isDynamicExtName,
FixitySig(..), RuleDecl(..),
- isClassOpSig
- )
-import BasicTypes ( Version, NewOrData(..), defaultFixity )
-import RdrHsSyn ( RdrNameHsDecl, RdrNameInstDecl, RdrNameTyClDecl, RdrNameRuleDecl,
- extractHsTyRdrNames
+ isClassOpSig, DeprecDecl(..)
)
-import RnEnv ( mkImportedGlobalName, newImportedBinder, mkImportedGlobalFromRdrName,
- lookupOccRn, lookupImplicitOccRn,
- pprAvail,
- availName, availNames, addAvailToNameSet,
- FreeVars, emptyFVs
+import HsImpExp ( ieNames )
+import CoreSyn ( CoreRule )
+import BasicTypes ( Version, NewOrData(..) )
+import RdrHsSyn ( RdrNameHsDecl, RdrNameInstDecl, RdrNameRuleDecl,
+ RdrNameDeprecation, RdrNameIE,
+ extractHsTyRdrNames
)
+import RnEnv
import RnMonad
-import RnHsSyn ( RenamedHsDecl )
import ParseIface ( parseIface, IfaceStuff(..) )
-import FiniteMap ( FiniteMap, sizeFM, emptyFM, delFromFM,
- 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,
+ isWiredInName, NamedThing(..),
+ elemNameEnv, extendNameEnv
)
-import Module ( Module, moduleString, pprModule,
- mkVanillaModule, pprModuleName,
- moduleUserString, moduleName, isLibModule,
+import Module ( Module, mkVanillaModule, pprModuleName,
+ moduleName, isLocalModule,
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(..), maybeToBool, orElse )
-import ListSetOps ( unionLists )
-import Outputable
-import Unique ( Unique )
-import StringBuffer ( StringBuffer, hGetStringBuffer )
+import PrelInfo ( cCallishTyKeys )
+import Maybes ( maybeToBool )
+import Unique ( Uniquable(..) )
+import StringBuffer ( hGetStringBuffer )
import FastString ( mkFastString )
+import ErrUtils ( Message )
+import Util ( sortLt )
import Lex
+import FiniteMap
import Outputable
+import Bag
-import IO ( isDoesNotExistError )
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 pprModuleName mods)) `thenRn_`
+ mapRn_ load mods `thenRn_`
returnRn ()
where
- load mod = loadInterface (pprModuleName mod <+> ptext SLIT("is a orphan-instance module")) mod ImportBySystem
-
-loadInterface :: SDoc -> ModuleName -> WhereFrom -> RnM d (Module, Ifaces)
-loadInterface doc_str mod_name from
+ load mod = loadInterface (mk_doc mod) mod ImportBySystem
+ mk_doc mod = pprModuleName 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 --> (... Just cts)
+ -- (If the load fails, we plug in a vanilla placeholder
+tryLoadInterface 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 of {
+ ImportByUser -> False ; -- Not hi-boot
+ ImportByUserSource -> True ; -- hi-boot
+ ImportBySystem ->
+ case mod_info of
+ Just (_, is_boot, _) -> is_boot
+
+ 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 (_, _, Just _)
-> -- 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, Just (mod, 0, 0, 0, from, []))
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 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 ->
+ getModuleRn `thenRn` \ this_mod ->
let
- rd_decls = pi_decls iface
+ mod = pi_mod 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 ->
+ -- 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 } &&
+ isLocalModule mod,
+ ppr mod )
+ foldlRn (loadDecl mod) (iDecls ifaces) (pi_decls iface) `thenRn` \ new_decls ->
+ foldlRn (loadInstDecl mod) (iInsts ifaces) (pi_insts iface) `thenRn` \ new_insts ->
+ loadRules mod (iRules ifaces) (pi_rules iface) `thenRn` \ new_rules ->
+ loadFixDecls mod_name (iFixes ifaces) (pi_fixity iface) `thenRn` \ new_fixities ->
+ foldlRn (loadDeprec mod) (iDeprecs ifaces) (pi_deprecs iface) `thenRn` \ new_deprecs ->
+ mapRn (loadExport this_mod) (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)
+ 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))
+ cts = (pi_mod iface, pi_vers iface,
+ fst (pi_fixity iface), fst (pi_rules iface),
+ from, concat avails_s)
+ mod_details = (pi_orphan iface, hi_boot_file, Just cts)
new_ifaces = ifaces { iImpModInfo = mod_map2,
iDecls = new_decls,
iFixes = new_fixities,
+ iInsts = new_insts,
iRules = new_rules,
- iInsts = new_insts }
+ iDeprecs = new_deprecs }
in
setIfacesRn new_ifaces `thenRn_`
- returnRn (mod, new_ifaces)
+ returnRn (new_ifaces, Nothing)
}}
-addModDeps :: Module -> ImportedModuleInfo
- -> [ImportVersion a] -> ImportedModuleInfo
-addModDeps mod mod_deps new_deps
- = foldr add mod_deps new_deps
+-----------------------------------------------------
+-- 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
+ | isLocalModule mod = [ (imp_mod, (has_orphans, is_boot, Nothing))
+ | (imp_mod, has_orphans, is_boot, _) <- new_deps
+ ]
+ | otherwise = [ (imp_mod, (True, False, Nothing))
+ | (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, cts) new
+ | maybeToBool cts || 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
+-----------------------------------------------------
+
+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
-
- -- Ignore the other sorts of decl
-loadFixDecl mod_name fixity_env other_decl = returnRn fixity_env
+-----------------------------------------------------
+-- Loading type/class/value decls
+-----------------------------------------------------
loadDecl :: Module
-> DeclsMap
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, (version, 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
in
returnRn 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 (rdrNameOcc rdr_name)
{-
If a signature decl is being loaded, and optIgnoreIfacePragmas is on,
-> SigD (IfaceSig name tp [] loc)
other -> decl
+-----------------------------------------------------
+-- Loading fixity decls
+-----------------------------------------------------
+
+loadFixDecls mod_name fixity_env (version, decls)
+ | null decls = returnRn fixity_env
+
+ | otherwise
+ = mapRn (loadFixDecl mod_name) decls `thenRn` \ to_add ->
+ returnRn (extendNameEnvList fixity_env to_add)
+
+loadFixDecl mod_name sig@(FixitySig rdr_name fixity loc)
+ = newGlobalName mod_name (rdrNameOcc rdr_name) `thenRn` \ name ->
+ returnRn (name, FixitySig name fixity loc)
+
+
+-----------------------------------------------------
+-- 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)
+-----------------------------------------------------
+-- Loading Rules
+-----------------------------------------------------
+
+loadRules :: Module -> IfaceRules
+ -> (Version, [RdrNameRuleDecl])
+ -> RnM d IfaceRules
+loadRules mod rule_bag (version, rules)
+ | null rules || opt_IgnoreIfacePragmas
+ = returnRn rule_bag
+ | otherwise
+ = setModuleRn mod $
+ mapRn (loadRule mod) rules `thenRn` \ new_rules ->
+ returnRn (rule_bag `unionBags` listToBag new_rules)
+
+loadRule :: Module -> RdrNameRuleDecl -> RnM d 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)
+loadRule mod decl@(IfaceRule _ _ var _ _ src_loc)
+ = lookupOrigName var `thenRn` \ var_name ->
+ returnRn (unitNameSet var_name, (mod, RuleD decl))
+
+loadBuiltinRules :: [(RdrName, CoreRule)] -> RnMG ()
+loadBuiltinRules builtin_rules
+ = getIfacesRn `thenRn` \ ifaces ->
+ mapRn loadBuiltinRule builtin_rules `thenRn` \ rule_decls ->
+ setIfacesRn (ifaces { iRules = iRules ifaces `unionBags` listToBag rule_decls })
+
+loadBuiltinRule (var, rule)
+ = lookupOrigName var `thenRn` \ var_name ->
+ returnRn (unitNameSet var_name, (nameModule var_name, RuleD (IfaceRuleOut var rule)))
+
+
+-----------------------------------------------------
+-- Loading Deprecations
+-----------------------------------------------------
+
+loadDeprec :: Module -> DeprecationEnv -> RdrNameDeprecation -> RnM d DeprecationEnv
+loadDeprec mod deprec_env (Deprecation (IEModuleContents _) txt _)
+ = traceRn (text "module deprecation not yet implemented:" <+> ppr mod <> colon <+> ppr txt) `thenRn_`
+ -- SUP: TEMPORARY HACK, ignoring module deprecations for now
+ returnRn deprec_env
+
+loadDeprec mod deprec_env (Deprecation ie txt _)
+ = setModuleRn mod $
+ mapRn lookupOrigName (ieNames ie) `thenRn` \ names ->
+ traceRn (text "loaded deprecation(s) for" <+> hcat (punctuate comma (map ppr names)) <> colon <+> ppr txt) `thenRn_`
+ returnRn (extendNameEnvList deprec_env (zip names (repeat txt)))
\end{code}
%********************************************************
%* *
-\subsection{Loading usage information}
+\subsection{Checking 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, _, whats_imported) : rest)
- = loadInterface doc_str mod_name ImportBySystem `thenRn` \ (mod, ifaces) ->
+upToDate = True
+outOfDate = False
+
+checkModUsage :: [ImportVersion OccName] -> RnMG Bool
+-- Given the usage information extracted from the old
+-- M.hi file for the module being compiled, figure out
+-- whether M needs to be recompiled.
+
+checkModUsage [] = returnRn upToDate -- Yes! Everything is up to date!
+
+checkModUsage ((mod_name, _, _, NothingAtAll) : 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, _, _, whats_imported) : rest)
+ = tryLoadInterface doc_str mod_name ImportBySystem `thenRn` \ (ifaces, maybe_err) ->
+ case maybe_err of {
+ Just err -> out_of_date (sep [ptext SLIT("Can't find version number for module"),
+ pprModuleName mod_name]) ;
+ -- Couldn't find or parse a module mentioned in the
+ -- old interface file. Don't complain -- it might just be that
+ -- the current module doesn't need that import and it's been deleted
+
+ Nothing ->
let
- maybe_mod_vers = case lookupFM (iImpModInfo ifaces) mod_name of
- Just (version, _, Just (_, _, _)) -> Just version
- other -> Nothing
+ (_, new_mod_vers, new_fix_vers, new_rule_vers, _, _)
+ = case lookupFM (iImpModInfo ifaces) mod_name of
+ Just (_, _, Just stuff) -> stuff
+
+ old_mod_vers = case whats_imported of
+ Everything v -> v
+ Specifically v _ _ _ -> v
+ -- NothingAtAll case dealt with by previous eqn for checkModUsage
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])
-- 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
+ case whats_imported of { -- NothingAtAll dealt with earlier
+
+ Everything _
+ -> out_of_date (ptext SLIT("...and I needed the whole module")) ;
- Specifically old_local_vers ->
+ Specifically _ old_fix_vers old_rule_vers old_local_vers ->
+ if old_fix_vers /= new_fix_vers then
+ out_of_date (ptext SLIT("Fixities changed"))
+ else if old_rule_vers /= new_rule_vers then
+ out_of_date (ptext SLIT("Rules changed"))
+ else
-- 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
+ returnRn outOfDate -- 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!
+ = returnRn upToDate -- Yes! All up to date!
checkEntityUsage mod decls ((occ_name,old_vers) : rest)
- = mkImportedGlobalName mod occ_name `thenRn` \ name ->
+ = newGlobalName mod occ_name `thenRn` \ name ->
case lookupNameEnv decls name of
Nothing -> -- We used it before, but it ain't there now
- putDocRn (sep [ptext SLIT("No longer exported:"), ppr name])
- `thenRn_` returnRn False
+ out_of_date (sep [ptext SLIT("No longer exported:"), ppr name])
Just (new_vers,_,_,_) -- It's there, but is it up to date?
| new_vers == old_vers
| otherwise
-- Out of date, so bale out
- -> putDocRn (sep [ptext SLIT("Out of date:"), ppr name]) `thenRn_`
- returnRn False
+ -> out_of_date (sep [ptext SLIT("Out of date:"), ppr name])
+
+out_of_date msg = traceRn msg `thenRn_` returnRn outOfDate
\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
- else
- if isLocallyDefined name then -- Don't bring in decls from
+ returnRn AlreadySlurped -- Already dealt with
+
+ 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}
+ addWarnRn (importDeclWarn name) `thenRn_`
+ returnRn AlreadySlurped
-\begin{code}
-getNonWiredInDecl :: Name -> RnMG (Maybe (Module, RdrNameHsDecl))
+ else if isWiredInName name then
+ -- When we find a wired-in name we must load its
+ -- home module so that we find any instance decls therein
+ loadHomeInterface doc name `thenRn_`
+ returnRn WiredIn
+
+ else getNonWiredInDecl name
+ where
+ doc = ptext SLIT("need home module for wired in thing") <+> ppr name
+
+
+{- I don't think this is necessary any more; SLPJ May 00
+ load_home name
+ | name `elemNameSet` source_binders = returnRn ()
+ -- When compiling the prelude, a wired-in thing may
+ -- be defined in this module, in which case we don't
+ -- want to load its home module!
+ -- Using 'isLocallyDefined' doesn't work because some of
+ -- the free variables returned are simply 'listTyCon_Name',
+ -- with a system provenance. We could look them up every time
+ -- but that seems a waste.
+ | otherwise = loadHomeInterface doc name `thenRn_`
+ returnRn ()
+-}
+
+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, 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 then
+ -- 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 (version,avail,_,decl)
- -> recordSlurp (Just version) avail `thenRn_`
- returnRn (Just decl)
+ -> setIfacesRn (recordSlurp ifaces version avail) `thenRn_`
+ returnRn (HereItIs decl)
- Nothing -- Can happen legitimately for "Optional" occurrences
+ Nothing
-> addErrRn (getDeclErr needed_name) `thenRn_`
- returnRn Nothing
+ returnRn AlreadySlurped
where
doc_str = ptext SLIT("need decl for") <+> ppr needed_name
+
+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) ->
+ = loadInterface doc_str mod_name from `thenRn` \ 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)
+ Just (_, _, Just (mod, _, _, _, _, avails)) -> returnRn (mod, avails)
+ -- loadInterface always puts something in the map
+ -- even if it's a fake
where
doc_str = sep [pprModuleName 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, _, Nothing)) <- 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
other -> ppr inst_ty
getImportedRules :: RnMG [(Module,RdrNameHsDecl)]
-getImportedRules
+getImportedRules
+ | opt_IgnoreIfacePragmas = returnRn []
+ | otherwise
= 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 (lookupFixity local_fix_env name)
| otherwise -- Imported
+ -- For imported names, we have to get their fixities by doing a loadHomeInterface,
+ -- and consulting the Ifaces that comes back from that, because the interface
+ -- file for the Name might not have been loaded yet. Why not? Suppose you import module A,
+ -- which exports a function 'f', which is defined in module B. Then B isn't loaded
+ -- 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
+ returnRn (lookupFixity (iFixes ifaces) name)
where
doc = ptext SLIT("Checking fixity for") <+> ppr name
\end{code}
%* *
%*********************************************************
-getImportVersions figures out
-what the ``usage information'' for this moudule is;
-that is, what it must record in its interface file as the things it uses.
-It records:
+getImportVersions figures out what the ``usage information'' for this
+moudule is; that is, what it must record in its interface file as the
+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@
-(which 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.
-\begin{code}
-getImportVersions :: ModuleName -- Name of this module
- -> Maybe [IE any] -- Export list for this module
- -> RnMG (VersionInfo Name) -- Version info for these names
+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.
-getImportVersions this_mod exports
+\begin{code}
+mkImportExportInfo :: ModuleName -- Name of this module
+ -> Avails -- Info about exports
+ -> Maybe [RdrNameIE] -- The export header
+ -> RnMG ([ExportItem], -- Export info for iface file; sorted
+ [ImportVersion OccName]) -- Import info for iface file; sorted
+ -- Both results are sorted into canonical order to
+ -- reduce needless wobbling of interface files
+
+mkImportExportInfo this_mod export_avails exports
= getIfacesRn `thenRn` \ ifaces ->
let
+ export_all_mods = case exports of
+ Nothing -> []
+ Just es -> [mod | IEModuleContents mod <- es,
+ mod /= this_mod]
+
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
+ mv_map :: FiniteMap ModuleName [(OccName,Version)]
+ mv_map = foldr add_mv emptyFM imp_names
+
+ add_mv (name, version) mv_map = addItem mv_map (moduleName (nameModule name))
+ (nameOccName name, version)
+
+ -- 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
+ -- (We must never lose track of orphans.)
+ --
+ -- (b) a source-imported module, don't record the dependency at all
+ --
+ -- (b) may seem a bit strange. The idea is that the usages in a .hi file records
+ -- *all* the module's dependencies other than the loop-breakers. We use
+ -- this info in findAndReadInterface to decide whether to look for a .hi file or
+ -- a .hi-boot file.
+ --
+ -- This means we won't track version changes, or orphans, from .hi-boot files.
+ -- The former is potentially rather bad news. It could be fixed by recording
+ -- whether something is a boot file along with the usage info for it, but
+ -- I can't be bothered just now.
+
+ mk_imp_info mod_name (has_orphans, is_boot, contents) 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
+
+ | otherwise
+ = let
+ go_for_it exports = (mod_name, has_orphans, is_boot, 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
+ -- '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.
+ -- The module in question must be a local module (in the same package)
+ go_for_it NothingAtAll
+
+ Just (mod, mod_vers, fix_vers, rule_vers, how_imported, _)
+ | is_sys_import && 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 mod_vers)
+
+ | otherwise
+ -> case lookupFM mv_map mod_name of
+ Just whats_imported -> go_for_it (Specifically mod_vers fix_vers rule_vers
+ (sortImport whats_imported))
+ Nothing -> go_for_it NothingAtAll
+ -- 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 = not (isLocalModule mod)
+ is_sys_import = case how_imported of
+ ImportBySystem -> True
+ other -> False
+
+
+ import_info = foldFM mk_imp_info [] mod_map
+
+ -- Sort exports into groups by module
+ export_fm :: FiniteMap ModuleName [RdrAvailInfo]
+ export_fm = foldr insert emptyFM export_avails
+
+ insert avail efm = addItem efm (moduleName (nameModule (availName avail)))
+ (rdrAvailInfo avail)
+
+ export_info = [(m, sortExport as) | (m,as) <- fmToList export_fm]
in
- returnRn (foldFM mk_version_info [] mod_map)
- where
- export_mods = case exports of
- Nothing -> []
- Just es -> [mod | IEModuleContents mod <- es, mod /= this_mod]
+ traceRn (text "Modules in Ifaces: " <+> fsep (map ppr (keysFM mod_map))) `thenRn_`
+ returnRn (export_info, import_info)
- add_mv v@(name, version) mv_map
- = addToFM_C add_item mv_map mod (Specifically [v])
- where
- mod = moduleName (nameModule name)
- add_item Everything _ = Everything
- add_item (Specifically xs) _ = Specifically (v:xs)
+addItem :: FiniteMap ModuleName [a] -> ModuleName -> a -> FiniteMap ModuleName [a]
+addItem fm mod x = addToFM_C add_item fm mod [x]
+ where
+ add_item xs _ = x:xs
+
+sortImport :: [(OccName,Version)] -> [(OccName,Version)]
+ -- Make the usage lists appear in canonical order
+sortImport vs = sortLt lt vs
+ where
+ lt (n1,v1) (n2,v2) = n1 < n2
- add_mod mod mv_map = addToFM mv_map mod Everything
+sortExport :: [RdrAvailInfo] -> [RdrAvailInfo]
+sortExport as = sortLt lt as
+ where
+ lt a1 a2 = availName a1 < availName a2
\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 })
+ version avail
+ = let
new_slurped_names = addAvailToNameSet slurped_names avail
+ new_imp_names = (availName avail, version) : 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))
+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)))
= new_name tycon src_loc `thenRn` \ tycon_name ->
returnRn (Just (AvailTC tycon_name [tycon_name]))
-getDeclBinders new_name (TyClD (ClassDecl _ cname _ sigs _ _ _ _ _ src_loc))
+getDeclBinders new_name (TyClD (ClassDecl _ cname _ _ sigs _ _ _ src_loc))
= new_name cname src_loc `thenRn` \ class_name ->
-- Record the names for the class ops
= new_name var src_loc `thenRn` \ var_name ->
returnRn (Just (Avail var_name))
-getDeclBinders new_name (FixD _) = returnRn Nothing
+getDeclBinders new_name (FixD _) = returnRn Nothing
+getDeclBinders new_name (DeprecD _) = returnRn Nothing
-- foreign declarations
getDeclBinders new_name (ForD (ForeignDecl nm kind _ dyn _ loc))
= 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
binds_haskell_name (FoImport _) _ = True
binds_haskell_name FoLabel _ = True
-binds_haskell_name FoExport ext_nm = isDynamic ext_nm
+binds_haskell_name FoExport ext_nm = isDynamicExtName ext_nm
----------------
-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 _ _ condecl 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 (nn ++ ns)
+ returnRn (n : ns)
getConFieldNames new_name [] = returnRn []
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 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 ->
+ --getHiMaps `thenRn` \ (search_path, hi_map, hiboot_map) ->
+ let
+ bomb = panic "findAndReadInterface: hi_maps: FIXME"
+ search_path = panic "findAndReadInterface: search_path: FIXME"
+ relevant_map | hi_boot_file = bomb --hiboot_map
+ | otherwise = bomb --hi_map
+ in
+ case lookupFM relevant_map mod_name of
+ -- Found the file
+ Just fpath -> traceRn (ptext SLIT("...reading from") <+> text fpath) `thenRn_`
+ readIface mod_name fpath
- 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
+ Nothing -> traceRn (ptext SLIT("...not found")) `thenRn_`
+ returnRn (Left (noIfaceErr mod_name hi_boot_file search_path))
+ 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],
nest 4 (ptext SLIT("reason:") <+> doc_str)]
@readIface@ tries just the one file.
\begin{code}
-readIface :: Module -> String -> RnM d (Maybe (Module, ParsedIface))
+readIface :: ModuleName -> String -> RnM d (Either Message ParsedIface)
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-readIface the_mod file_path
+readIface wanted_mod file_path
= ioToRnM (hGetStringBuffer False file_path) `thenRn` \ read_result ->
case read_result of
Right contents ->
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)
+ POk _ (PIface iface) ->
+ warnCheckRn (read_mod == wanted_mod)
+ (hiModuleNameMismatchWarn wanted_mod read_mod) `thenRn_`
+ returnRn (Right iface)
+ where
+ read_mod = moduleName (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)]
+noIfaceErr mod_name boot_file search_path
+ = vcat [ptext SLIT("Could not find interface file for") <+> quotes (pprModuleName mod_name),
+ ptext SLIT("in the directories") <+>
+ -- \& to avoid cpp interpreting this string as a
+ -- comment starter with a pre-4.06 mkdependHS --SDM
+ vcat [ text dir <> text "/\&*" <> pp_suffix suffix
+ | (dir,suffix) <- search_path]
+ ]
where
- boot | boot_file = ptext SLIT("[boot]")
- | otherwise = empty
+ pp_suffix suffix | boot_file = ptext SLIT(".hi-boot")
+ | otherwise = text suffix
-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)
+
+hiModuleNameMismatchWarn :: ModuleName -> ModuleName -> Message
+hiModuleNameMismatchWarn requested_mod read_mod =
+ hsep [ ptext SLIT("Something is amiss; requested module name")
+ , pprModuleName requested_mod
+ , ptext SLIT("differs from name found in the interface file")
+ , pprModuleName read_mod
+ ]
+
\end{code}
projects / ghc-hetmet.git / blobdiff