2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
4 \section{Dealing with interface files}
8 readIface, findAndReadIface, loadInterface, loadHomeInterface,
9 tryLoadInterface, loadOrphanModules,
10 loadExports, loadFixDecls, loadDeprecs,
17 #include "HsVersions.h"
19 import DriverState ( GhcMode(..), v_GhcMode )
20 import DriverUtil ( splitFilename )
21 import CmdLineOpts ( opt_IgnoreIfacePragmas )
22 import HscTypes ( ModuleLocation(..),
23 ModIface(..), emptyModIface,
24 VersionInfo(..), ImportedModuleInfo,
26 ImportVersion, WhetherHasOrphans, IsBootInterface,
27 DeclsMap, GatedDecl, IfaceInsts, IfaceRules,
28 AvailInfo, GenAvailInfo(..), Avails, Deprecations(..)
30 import HsSyn ( TyClDecl(..), InstDecl(..),
31 HsType(..), HsPred(..), FixitySig(..), RuleDecl(..),
32 tyClDeclNames, tyClDeclSysNames
34 import RdrHsSyn ( RdrNameTyClDecl, RdrNameInstDecl, RdrNameRuleDecl,
35 extractSomeHsTysRdrNames
37 import BasicTypes ( Version, defaultFixity )
40 import ParseIface ( parseIface )
42 import Name ( Name {-instance NamedThing-},
43 nameModule, isLocalName, nameIsLocalOrFrom
47 import RdrName ( rdrNameOcc, isRdrTc )
48 import SrcLoc ( mkSrcLoc )
49 import Maybes ( maybeToBool, orElse )
50 import StringBuffer ( hGetStringBuffer )
51 import FastString ( mkFastString )
52 import ErrUtils ( Message )
53 import Finder ( findModule, findPackageModule )
65 %*********************************************************
67 \subsection{Loading a new interface file}
69 %*********************************************************
72 loadHomeInterface :: SDoc -> Name -> RnM d ModIface
73 loadHomeInterface doc_str name
74 = ASSERT2( not (isLocalName name), ppr name <+> parens doc_str )
75 loadInterface doc_str (moduleName (nameModule name)) ImportBySystem
77 loadOrphanModules :: [ModuleName] -> RnM d ()
78 loadOrphanModules mods
79 | null mods = returnRn ()
80 | otherwise = traceRn (text "Loading orphan modules:" <+>
81 fsep (map ppr mods)) `thenRn_`
82 mapRn_ load mods `thenRn_`
85 load mod = loadInterface (mk_doc mod) mod ImportBySystem
86 mk_doc mod = ppr mod <+> ptext SLIT("is a orphan-instance module")
88 loadInterface :: SDoc -> ModuleName -> WhereFrom -> RnM d ModIface
89 loadInterface doc mod from
90 = tryLoadInterface doc mod from `thenRn` \ (ifaces, maybe_err) ->
92 Nothing -> returnRn ifaces
93 Just err -> failWithRn ifaces (elaborate err)
95 elaborate err = hang (ptext SLIT("failed to load interface for") <+> quotes (ppr mod) <> colon)
98 tryLoadInterface :: SDoc -> ModuleName -> WhereFrom -> RnM d (ModIface, Maybe Message)
99 -- Returns (Just err) if an error happened
100 -- It *doesn't* add an error to the monad, because sometimes it's ok to fail...
101 -- Specifically, when we read the usage information from an interface file,
102 -- we try to read the interfaces it mentions. But it's OK to fail; perhaps
103 -- the module has changed, and that interface is no longer used.
105 -- tryLoadInterface guarantees to return with iImpModInfo m --> (..., True)
106 -- (If the load fails, we plug in a vanilla placeholder)
107 tryLoadInterface doc_str mod_name from
108 = getHomeIfaceTableRn `thenRn` \ hit ->
109 getModuleRn `thenRn` \ this_mod ->
110 getIfacesRn `thenRn` \ ifaces@(Ifaces { iPIT = pit }) ->
112 -- CHECK WHETHER WE HAVE IT ALREADY
113 case lookupIfaceByModName hit pit mod_name of {
114 Just iface | case from of
115 ImportByUser -> not (mi_boot iface)
116 ImportByUserSource -> mi_boot iface
117 ImportBySystem -> True
118 -> returnRn (iface, Nothing) ; -- Already loaded
119 -- The not (mi_boot iface) test checks that the already-loaded
120 -- interface isn't a boot iface. This can conceivably happen,
121 -- if the version checking happened to load a boot interface
122 -- before we got to real imports.
126 mod_map = iImpModInfo ifaces
127 mod_info = lookupFM mod_map mod_name
130 = case (from, mod_info) of
131 (ImportByUser, _) -> False -- Not hi-boot
132 (ImportByUserSource, _) -> True -- hi-boot
133 (ImportBySystem, Just (_, is_boot)) -> is_boot
134 (ImportBySystem, Nothing) -> False
135 -- We're importing a module we know absolutely
136 -- nothing about, so we assume it's from
137 -- another package, where we aren't doing
138 -- dependency tracking. So it won't be a hi-boot file.
140 redundant_source_import
141 = case (from, mod_info) of
142 (ImportByUserSource, Just (_,False)) -> True
146 -- Issue a warning for a redundant {- SOURCE -} import
147 -- NB that we arrange to read all the ordinary imports before
148 -- any of the {- SOURCE -} imports
149 warnCheckRn (not redundant_source_import)
150 (warnRedundantSourceImport mod_name) `thenRn_`
152 -- Check that we aren't importing ourselves.
153 -- That only happens in Rename.checkOldIface,
154 -- which doesn't call tryLoadInterface
156 (not (isHomeModule this_mod) || moduleName this_mod /= mod_name)
157 (warnSelfImport this_mod) `thenRn_`
159 -- READ THE MODULE IN
160 findAndReadIface doc_str mod_name hi_boot_file
161 `thenRn` \ read_result ->
162 case read_result of {
163 Left err -> -- Not found, so add an empty export env to the Ifaces map
164 -- so that we don't look again
166 fake_mod = mkVanillaModule mod_name
167 fake_iface = emptyModIface fake_mod
168 new_ifaces = ifaces { iPIT = extendModuleEnv pit fake_mod fake_iface }
170 setIfacesRn new_ifaces `thenRn_`
171 returnRn (fake_iface, Just err) ;
174 Right (mod, iface) ->
176 -- LOAD IT INTO Ifaces
178 -- NB: *first* we do loadDecl, so that the provenance of all the locally-defined
179 --- names is done correctly (notably, whether this is an .hi file or .hi-boot file).
180 -- If we do loadExport first the wrong info gets into the cache (unless we
181 -- explicitly tag each export which seems a bit of a bore)
184 -- Sanity check. If we're system-importing a module we know nothing at all
185 -- about, it should be from a different package to this one
186 WARN( not (maybeToBool mod_info) &&
187 case from of { ImportBySystem -> True; other -> False } &&
191 loadDecls mod (iDecls ifaces) (pi_decls iface) `thenRn` \ (decls_vers, new_decls) ->
192 loadRules mod (iRules ifaces) (pi_rules iface) `thenRn` \ (rule_vers, new_rules) ->
193 loadInstDecls mod (iInsts ifaces) (pi_insts iface) `thenRn` \ new_insts ->
194 loadExports (pi_exports iface) `thenRn` \ (export_vers, avails) ->
195 loadFixDecls mod (pi_fixity iface) `thenRn` \ fix_env ->
196 loadDeprecs mod (pi_deprecs iface) `thenRn` \ deprec_env ->
198 version = VersionInfo { vers_module = pi_vers iface,
199 vers_exports = export_vers,
200 vers_rules = rule_vers,
201 vers_decls = decls_vers }
203 -- For an explicit user import, add to mod_map info about
204 -- the things the imported module depends on, extracted
205 -- from its usage info; and delete the module itself, which is now in the PIT
206 mod_map1 = case from of
207 ImportByUser -> addModDeps mod is_loaded (pi_usages iface) mod_map
209 mod_map2 = delFromFM mod_map1 mod_name
211 this_mod_name = moduleName this_mod
212 is_loaded m = m == this_mod_name
213 || maybeToBool (lookupIfaceByModName hit pit m)
214 -- We treat the currently-being-compiled module as 'loaded' because
215 -- even though it isn't yet in the HIT or PIT; otherwise it gets
216 -- put into iImpModInfo, and then spat out into its own interface
217 -- file as a dependency
219 -- Now add info about this module to the PIT
220 has_orphans = pi_orphan iface
221 new_pit = extendModuleEnv pit mod mod_iface
222 mod_iface = ModIface { mi_module = mod, mi_version = version,
223 mi_orphan = has_orphans, mi_boot = hi_boot_file,
225 mi_fixities = fix_env, mi_deprecs = deprec_env,
226 mi_usages = [], -- Will be filled in later
227 mi_decls = panic "No mi_decls in PIT",
228 mi_globals = mkIfaceGlobalRdrEnv avails
231 new_ifaces = ifaces { iPIT = new_pit,
235 iImpModInfo = mod_map2 }
237 setIfacesRn new_ifaces `thenRn_`
238 returnRn (mod_iface, Nothing)
241 -----------------------------------------------------
242 -- Adding module dependencies from the
243 -- import decls in the interface file
244 -----------------------------------------------------
247 -> (ModuleName -> Bool) -- True for modules that are already loaded
249 -> ImportedModuleInfo -> ImportedModuleInfo
250 -- (addModDeps M ivs deps)
251 -- We are importing module M, and M.hi contains 'import' decls given by ivs
252 addModDeps mod is_loaded new_deps mod_deps
253 = foldr add mod_deps filtered_new_deps
255 -- Don't record dependencies when importing a module from another package
256 -- Except for its descendents which contain orphans,
257 -- and in that case, forget about the boot indicator
258 filtered_new_deps :: [(ModuleName, (WhetherHasOrphans, IsBootInterface))]
260 | isHomeModule mod = [ (imp_mod, (has_orphans, is_boot))
261 | (imp_mod, has_orphans, is_boot, _) <- new_deps,
262 not (is_loaded imp_mod)
264 | otherwise = [ (imp_mod, (True, False))
265 | (imp_mod, has_orphans, _, _) <- new_deps,
266 not (is_loaded imp_mod) && has_orphans
268 add (imp_mod, dep) deps = addToFM_C combine deps imp_mod dep
270 combine old@(old_has_orphans, old_is_boot) new@(new_has_orphans, new_is_boot)
271 | old_is_boot = new -- Record the best is_boot info
274 -----------------------------------------------------
275 -- Loading the export list
276 -----------------------------------------------------
278 loadExports :: (Version, [ExportItem]) -> RnM d (Version, [(ModuleName,Avails)])
279 loadExports (vers, items)
280 = mapRn loadExport items `thenRn` \ avails_s ->
281 returnRn (vers, avails_s)
284 loadExport :: ExportItem -> RnM d (ModuleName, Avails)
285 loadExport (mod, entities)
286 = mapRn (load_entity mod) entities `thenRn` \ avails ->
287 returnRn (mod, avails)
289 load_entity mod (Avail occ)
290 = newGlobalName mod occ `thenRn` \ name ->
291 returnRn (Avail name)
292 load_entity mod (AvailTC occ occs)
293 = newGlobalName mod occ `thenRn` \ name ->
294 mapRn (newGlobalName mod) occs `thenRn` \ names ->
295 returnRn (AvailTC name names)
298 -----------------------------------------------------
299 -- Loading type/class/value decls
300 -----------------------------------------------------
304 -> [(Version, RdrNameTyClDecl)]
305 -> RnM d (NameEnv Version, DeclsMap)
306 loadDecls mod (decls_map, n_slurped) decls
307 = foldlRn (loadDecl mod) (emptyNameEnv, decls_map) decls `thenRn` \ (vers, decls_map') ->
308 returnRn (vers, (decls_map', n_slurped))
310 loadDecl mod (version_map, decls_map) (version, decl)
311 = getTyClDeclBinders mod decl `thenRn` \ (avail, sys_names) ->
313 full_avail = case avail of
315 AvailTC n ns -> AvailTC n (sys_names ++ ns)
316 main_name = availName full_avail
317 new_decls_map = extendNameEnvList decls_map stuff
318 stuff = [ (name, (full_avail, name==main_name, (mod, decl)))
319 | name <- availNames full_avail]
321 new_version_map = extendNameEnv version_map main_name version
323 returnRn (new_version_map, new_decls_map)
325 -----------------------------------------------------
326 -- Loading fixity decls
327 -----------------------------------------------------
329 loadFixDecls mod decls
330 = mapRn (loadFixDecl mod_name) decls `thenRn` \ to_add ->
331 returnRn (mkNameEnv to_add)
333 mod_name = moduleName mod
335 loadFixDecl mod_name sig@(FixitySig rdr_name fixity loc)
336 = newGlobalName mod_name (rdrNameOcc rdr_name) `thenRn` \ name ->
337 returnRn (name, fixity)
340 -----------------------------------------------------
341 -- Loading instance decls
342 -----------------------------------------------------
344 loadInstDecls :: Module
348 loadInstDecls mod (insts, n_slurped) decls
350 foldlRn (loadInstDecl mod) insts decls `thenRn` \ insts' ->
351 returnRn (insts', n_slurped)
354 loadInstDecl mod insts decl@(InstDecl inst_ty _ _ _ _)
355 = -- Find out what type constructors and classes are "gates" for the
356 -- instance declaration. If all these "gates" are slurped in then
357 -- we should slurp the instance decl too.
359 -- We *don't* want to count names in the context part as gates, though.
361 -- instance Foo a => Baz (T a) where ...
363 -- Here the gates are Baz and T, but *not* Foo.
365 -- HOWEVER: functional dependencies make things more complicated
366 -- class C a b | a->b where ...
367 -- instance C Foo Baz where ...
368 -- Here, the gates are really only C and Foo, *not* Baz.
369 -- That is, if C and Foo are visible, even if Baz isn't, we must
372 -- Rather than take fundeps into account "properly", we just slurp
373 -- if C is visible and *any one* of the Names in the types
374 -- This is a slightly brutal approximation, but most instance decls
375 -- are regular H98 ones and it's perfect for them.
377 (cls_name,tys) = get_head inst_ty
378 free_ty_names = extractSomeHsTysRdrNames isRdrTc tys
380 lookupIfaceName cls_name `thenRn` \ cls_name' ->
381 mapRn lookupIfaceName free_ty_names `thenRn` \ free_ty_names' ->
383 gate_fn vis_fn = vis_fn cls_name' && any vis_fn free_ty_names'
384 -- Here is the implementation of HOWEVER above
386 returnRn ((gate_fn, (mod, decl)) `consBag` insts)
389 -- In interface files, the instance decls now look like
390 -- forall a. Foo a -> Baz (T a)
391 -- so we have to strip off function argument types as well
392 -- as the bit before the '=>' (which is always empty in interface files)
394 -- The parser ensures the type will have the right shape.
395 -- (e.g. see ParseUtil.checkInstType)
397 get_head (HsForAllTy tvs cxt ty) = get_head ty
398 get_head (HsFunTy _ ty) = get_head ty
399 get_head (HsPredTy (HsClassP cls tys)) = (cls,tys)
403 -----------------------------------------------------
405 -----------------------------------------------------
407 loadRules :: Module -> IfaceRules
408 -> (Version, [RdrNameRuleDecl])
409 -> RnM d (Version, IfaceRules)
410 loadRules mod (rule_bag, n_slurped) (version, rules)
411 | null rules || opt_IgnoreIfacePragmas
412 = returnRn (version, (rule_bag, n_slurped))
415 mapRn (loadRule mod) rules `thenRn` \ new_rules ->
416 returnRn (version, (rule_bag `unionBags` listToBag new_rules, n_slurped))
418 loadRule :: Module -> RdrNameRuleDecl -> RnM d (GatedDecl RdrNameRuleDecl)
419 -- "Gate" the rule simply by whether the rule variable is
420 -- needed. We can refine this later.
421 loadRule mod decl@(IfaceRule _ _ var _ _ src_loc)
422 = lookupIfaceName var `thenRn` \ var_name ->
423 returnRn (\vis_fn -> vis_fn var_name, (mod, decl))
426 -----------------------------------------------------
427 -- Loading Deprecations
428 -----------------------------------------------------
430 loadDeprecs :: Module -> IfaceDeprecs -> RnM d Deprecations
431 loadDeprecs m Nothing = returnRn NoDeprecs
432 loadDeprecs m (Just (Left txt)) = returnRn (DeprecAll txt)
433 loadDeprecs m (Just (Right prs)) = setModuleRn m $
434 foldlRn loadDeprec emptyNameEnv prs `thenRn` \ env ->
435 returnRn (DeprecSome env)
436 loadDeprec deprec_env (n, txt)
437 = lookupIfaceName n `thenRn` \ name ->
438 traceRn (text "Loaded deprecation(s) for" <+> ppr name <> colon <+> ppr txt) `thenRn_`
439 returnRn (extendNameEnv deprec_env name (name,txt))
443 %*********************************************************
445 \subsection{Getting binders out of a declaration}
447 %*********************************************************
449 @getDeclBinders@ returns the names for a @RdrNameHsDecl@.
450 It's used for both source code (from @availsFromDecl@) and interface files
453 It doesn't deal with source-code specific things: @ValD@, @DefD@. They
454 are handled by the sourc-code specific stuff in @RnNames@.
456 *** See "THE NAMING STORY" in HsDecls ****
463 -> RnM d (AvailInfo, [Name]) -- The [Name] are the system names
466 getTyClDeclBinders mod (IfaceSig {tcdName = var, tcdLoc = src_loc})
467 = newTopBinder mod var src_loc `thenRn` \ var_name ->
468 returnRn (Avail var_name, [])
470 getTyClDeclBinders mod tycl_decl
471 = new_top_bndrs mod (tyClDeclNames tycl_decl) `thenRn` \ names@(main_name:_) ->
472 new_top_bndrs mod (tyClDeclSysNames tycl_decl) `thenRn` \ sys_names ->
473 returnRn (AvailTC main_name names, sys_names)
476 new_top_bndrs mod names_w_locs
477 = sequenceRn [newTopBinder mod name loc | (name,loc) <- names_w_locs]
481 %*********************************************************
483 \subsection{Reading an interface file}
485 %*********************************************************
488 findAndReadIface :: SDoc -> ModuleName
489 -> IsBootInterface -- True <=> Look for a .hi-boot file
490 -- False <=> Look for .hi file
491 -> RnM d (Either Message (Module, ParsedIface))
492 -- Nothing <=> file not found, or unreadable, or illegible
493 -- Just x <=> successfully found and parsed
495 findAndReadIface doc_str mod_name hi_boot_file
496 = traceRn trace_msg `thenRn_`
498 -- In interactive or --make mode, we are *not allowed* to demand-load
499 -- a home package .hi file. So don't even look for them.
500 -- This helps in the case where you are sitting in eg. ghc/lib/std
501 -- and start up GHCi - it won't complain that all the modules it tries
502 -- to load are found in the home location.
503 ioToRnM_no_fail (readIORef v_GhcMode) `thenRn` \ mode ->
504 let home_allowed = hi_boot_file ||
505 mode `notElem` [ DoInteractive, DoMake ]
508 ioToRnM (if home_allowed
509 then findModule mod_name
510 else findPackageModule mod_name) `thenRn` \ maybe_found ->
514 Right (Just (wanted_mod,locn))
515 -> mkHiPath hi_boot_file locn `thenRn` \ file ->
516 readIface file `thenRn` \ read_result ->
518 Left bad -> returnRn (Left bad)
520 -> let read_mod = pi_mod iface
521 in -- check that the module names agree
523 (wanted_mod == read_mod)
524 (hiModuleNameMismatchWarn wanted_mod read_mod)
526 -- check that the package names agree
528 (modulePackage wanted_mod == modulePackage read_mod)
529 (packageNameMismatchWarn wanted_mod read_mod)
531 returnRn (Right (wanted_mod, iface))
533 other -> traceRn (ptext SLIT("...not found")) `thenRn_`
534 returnRn (Left (noIfaceErr mod_name hi_boot_file))
537 trace_msg = sep [hsep [ptext SLIT("Reading"),
538 if hi_boot_file then ptext SLIT("[boot]") else empty,
539 ptext SLIT("interface for"),
540 ppr mod_name <> semi],
541 nest 4 (ptext SLIT("reason:") <+> doc_str)]
543 mkHiPath hi_boot_file locn
545 ioToRnM_no_fail (doesFileExist hi_boot_ver_path) `thenRn` \ b ->
546 if b then returnRn hi_boot_ver_path
547 else returnRn hi_boot_path
548 | otherwise = returnRn hi_path
549 where hi_path = ml_hi_file locn
550 (hi_base, _hi_suf) = splitFilename hi_path
551 hi_boot_path = hi_base ++ ".hi-boot"
552 hi_boot_ver_path = hi_base ++ ".hi-boot-" ++ cHscIfaceFileVersion
555 @readIface@ tries just the one file.
558 readIface :: String -> RnM d (Either Message ParsedIface)
559 -- Nothing <=> file not found, or unreadable, or illegible
560 -- Just x <=> successfully found and parsed
562 = --ioToRnM (putStrLn ("reading iface " ++ file_path)) `thenRn_`
563 traceRn (ptext SLIT("readIFace") <+> text file_path) `thenRn_`
565 ioToRnM (hGetStringBuffer False file_path) `thenRn` \ read_result ->
566 case read_result of {
567 Left io_error -> bale_out (text (show io_error)) ;
570 case parseIface contents init_parser_state of
571 POk _ iface -> returnRn (Right iface)
572 PFailed err -> bale_out err
575 init_parser_state = PState{ bol = 0#, atbol = 1#,
578 loc = mkSrcLoc (mkFastString file_path) 1 }
580 bale_out err = returnRn (Left (badIfaceFile file_path err))
584 %*********************************************************
586 \subsection{Looking up fixities}
588 %*********************************************************
590 @lookupFixityRn@ has to be in RnIfaces (or RnHiFiles) because
591 it calls @loadHomeInterface@.
593 lookupFixity is a bit strange.
595 * Nested local fixity decls are put in the local fixity env, which we
596 find with getFixtyEnv
598 * Imported fixities are found in the HIT or PIT
600 * Top-level fixity decls in this module may be for Names that are
601 either Global (constructors, class operations)
602 or Local/Exported (everything else)
603 (See notes with RnNames.getLocalDeclBinders for why we have this split.)
604 We put them all in the local fixity environment
607 lookupFixityRn :: Name -> RnMS Fixity
609 = getModuleRn `thenRn` \ this_mod ->
610 if nameIsLocalOrFrom this_mod name
611 then -- It's defined in this module
612 getFixityEnv `thenRn` \ local_fix_env ->
613 returnRn (lookupLocalFixity local_fix_env name)
615 else -- It's imported
616 -- For imported names, we have to get their fixities by doing a
617 -- loadHomeInterface, and consulting the Ifaces that comes back
618 -- from that, because the interface file for the Name might not
619 -- have been loaded yet. Why not? Suppose you import module A,
620 -- which exports a function 'f', which is defined in module B.
621 -- Then B isn't loaded right away (after all, it's possible that
622 -- nothing from B will be used). When we come across a use of
623 -- 'f', we need to know its fixity, and it's then, and only
624 -- then, that we load B.hi. That is what's happening here.
625 loadHomeInterface doc name `thenRn` \ iface ->
626 returnRn (lookupNameEnv (mi_fixities iface) name `orElse` defaultFixity)
628 doc = ptext SLIT("Checking fixity for") <+> ppr name
632 %*********************************************************
636 %*********************************************************
639 noIfaceErr mod_name boot_file
640 = ptext SLIT("Could not find interface file for") <+> quotes (ppr mod_name)
641 -- We used to print the search path, but we can't do that
642 -- now, because it's hidden inside the finder.
643 -- Maybe the finder should expose more functions.
645 badIfaceFile file err
646 = vcat [ptext SLIT("Bad interface file:") <+> text file,
649 hiModuleNameMismatchWarn :: Module -> Module -> Message
650 hiModuleNameMismatchWarn requested_mod read_mod =
651 hsep [ ptext SLIT("Something is amiss; requested module name")
652 , ppr (moduleName requested_mod)
653 , ptext SLIT("differs from name found in the interface file")
657 packageNameMismatchWarn :: Module -> Module -> Message
658 packageNameMismatchWarn requested_mod read_mod =
659 fsep [ ptext SLIT("Module"), quotes (ppr requested_mod),
660 ptext SLIT("is located in package"),
661 quotes (ptext (modulePackage requested_mod)),
662 ptext SLIT("but its interface file claims it is part of package"),
663 quotes (ptext (modulePackage read_mod))
666 warnRedundantSourceImport mod_name
667 = ptext SLIT("Unnecessary {- SOURCE -} in the import of module")
668 <+> quotes (ppr mod_name)
671 = ptext SLIT("Module") <+> quotes (ppr mod) <+> ptext SLIT("is not loaded")
674 = ptext SLIT("Importing my own interface: module") <+> ppr mod