2 % (c) The University of Glasgow 2006
3 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
6 Loading interface files
10 loadInterface, loadInterfaceForName, loadWiredInHomeIface,
11 loadSrcInterface, loadSysInterface, loadUserInterface, loadOrphanModules,
12 findAndReadIface, readIface, -- Used when reading the module's old interface
13 loadDecls, -- Should move to TcIface and be renamed
14 initExternalPackageState,
16 ifaceStats, pprModIface, showIface
19 #include "HsVersions.h"
21 import {-# SOURCE #-} TcIface( tcIfaceDecl, tcIfaceRules, tcIfaceInst,
22 tcIfaceFamInst, tcIfaceVectInfo, tcIfaceAnnotations )
29 import BasicTypes hiding (SuccessFlag(..))
63 %************************************************************************
65 loadSrcInterface, loadOrphanModules, loadHomeInterface
67 These three are called from TcM-land
69 %************************************************************************
72 -- | Load the interface corresponding to an @import@ directive in
73 -- source code. On a failure, fail in the monad with an error message.
74 loadSrcInterface :: SDoc
76 -> IsBootInterface -- {-# SOURCE #-} ?
77 -> Maybe FastString -- "package", if any
80 loadSrcInterface doc mod want_boot maybe_pkg = do
81 -- We must first find which Module this import refers to. This involves
82 -- calling the Finder, which as a side effect will search the filesystem
83 -- and create a ModLocation. If successful, loadIface will read the
84 -- interface; it will call the Finder again, but the ModLocation will be
85 -- cached from the first search.
87 res <- liftIO $ findImportedModule hsc_env mod maybe_pkg
90 mb_iface <- initIfaceTcRn $ loadInterface doc mod (ImportByUser want_boot)
92 Failed err -> failWithTc err
93 Succeeded iface -> return iface
95 let dflags = hsc_dflags hsc_env in
96 failWithTc (cannotFindInterface dflags mod err)
98 -- | Load interfaces for a collection of orphan modules.
99 loadOrphanModules :: [Module] -- the modules
100 -> Bool -- these are family instance-modules
102 loadOrphanModules mods isFamInstMod
103 | null mods = return ()
104 | otherwise = initIfaceTcRn $
105 do { traceIf (text "Loading orphan modules:" <+>
110 load mod = loadSysInterface (mk_doc mod) mod
112 | isFamInstMod = ppr mod <+> ptext (sLit "is a family-instance module")
113 | otherwise = ppr mod <+> ptext (sLit "is a orphan-instance module")
115 -- | Loads the interface for a given Name.
116 loadInterfaceForName :: SDoc -> Name -> TcRn ModIface
117 loadInterfaceForName doc name
120 -- Should not be called with a name from the module being compiled
121 { this_mod <- getModule
122 ; MASSERT2( not (nameIsLocalOrFrom this_mod name), ppr name <+> parens doc )
124 ; ASSERT2( isExternalName name, ppr name )
125 initIfaceTcRn $ loadSysInterface doc (nameModule name)
128 -- | An 'IfM' function to load the home interface for a wired-in thing,
129 -- so that we're sure that we see its instance declarations and rules
130 -- See Note [Loading instances for wired-in things] in TcIface
131 loadWiredInHomeIface :: Name -> IfM lcl ()
132 loadWiredInHomeIface name
133 = ASSERT( isWiredInName name )
134 do loadSysInterface doc (nameModule name); return ()
136 doc = ptext (sLit "Need home interface for wired-in thing") <+> ppr name
138 -- | Loads a system interface and throws an exception if it fails
139 loadSysInterface :: SDoc -> Module -> IfM lcl ModIface
140 loadSysInterface doc mod_name = loadInterfaceWithException doc mod_name ImportBySystem
142 -- | Loads a user interface and throws an exception if it fails. The first parameter indicates
143 -- whether we should import the boot variant of the module
144 loadUserInterface :: Bool -> SDoc -> Module -> IfM lcl ModIface
145 loadUserInterface is_boot doc mod_name = loadInterfaceWithException doc mod_name (ImportByUser is_boot)
147 -- | A wrapper for 'loadInterface' that throws an exception if it fails
148 loadInterfaceWithException :: SDoc -> Module -> WhereFrom -> IfM lcl ModIface
149 loadInterfaceWithException doc mod_name where_from
150 = do { mb_iface <- loadInterface doc mod_name where_from
152 Failed err -> ghcError (ProgramError (showSDoc err))
153 Succeeded iface -> return iface }
157 %*********************************************************
161 The main function to load an interface
162 for an imported module, and put it in
163 the External Package State
165 %*********************************************************
168 loadInterface :: SDoc -> Module -> WhereFrom
169 -> IfM lcl (MaybeErr Message ModIface)
171 -- loadInterface looks in both the HPT and PIT for the required interface
172 -- If not found, it loads it, and puts it in the PIT (always).
174 -- If it can't find a suitable interface file, we
175 -- a) modify the PackageIfaceTable to have an empty entry
176 -- (to avoid repeated complaints)
177 -- b) return (Left message)
179 -- It's not necessarily an error for there not to be an interface
180 -- file -- perhaps the module has changed, and that interface
183 loadInterface doc_str mod from
184 = do { -- Read the state
185 (eps,hpt) <- getEpsAndHpt
187 ; traceIf (text "Considering whether to load" <+> ppr mod <+> ppr from)
189 -- Check whether we have the interface already
191 ; case lookupIfaceByModule dflags hpt (eps_PIT eps) mod of {
193 -> return (Succeeded iface) ; -- Already loaded
194 -- The (src_imp == mi_boot iface) test checks that the already-loaded
195 -- interface isn't a boot iface. This can conceivably happen,
196 -- if an earlier import had a before we got to real imports. I think.
199 let { hi_boot_file = case from of
200 ImportByUser usr_boot -> usr_boot
201 ImportBySystem -> sys_boot
203 ; mb_dep = lookupUFM (eps_is_boot eps) (moduleName mod)
204 ; sys_boot = case mb_dep of
205 Just (_, is_boot) -> is_boot
207 -- The boot-ness of the requested interface,
208 } -- based on the dependencies in directly-imported modules
210 -- READ THE MODULE IN
211 ; read_result <- findAndReadIface doc_str mod hi_boot_file
212 ; case read_result of {
214 { let fake_iface = emptyModIface mod
216 ; updateEps_ $ \eps ->
217 eps { eps_PIT = extendModuleEnv (eps_PIT eps) (mi_module fake_iface) fake_iface }
218 -- Not found, so add an empty iface to
219 -- the EPS map so that we don't look again
221 ; return (Failed err) } ;
224 -- We used to have a sanity check here that looked for:
225 -- * System importing ..
226 -- * a home package module ..
227 -- * that we know nothing about (mb_dep == Nothing)!
229 -- But this is no longer valid because thNameToGhcName allows users to
230 -- cause the system to load arbitrary interfaces (by supplying an appropriate
231 -- Template Haskell original-name).
232 Succeeded (iface, file_path) ->
235 loc_doc = text file_path
237 initIfaceLcl mod loc_doc $ do
239 -- Load the new ModIface into the External Package State
240 -- Even home-package interfaces loaded by loadInterface
241 -- (which only happens in OneShot mode; in Batch/Interactive
242 -- mode, home-package modules are loaded one by one into the HPT)
243 -- are put in the EPS.
245 -- The main thing is to add the ModIface to the PIT, but
247 -- IfaceDecls, IfaceInst, IfaceFamInst, IfaceRules, IfaceVectInfo
248 -- out of the ModIface and put them into the big EPS pools
250 -- NB: *first* we do loadDecl, so that the provenance of all the locally-defined
251 --- names is done correctly (notably, whether this is an .hi file or .hi-boot file).
252 -- If we do loadExport first the wrong info gets into the cache (unless we
253 -- explicitly tag each export which seems a bit of a bore)
255 ; ignore_prags <- doptM Opt_IgnoreInterfacePragmas
256 ; new_eps_decls <- loadDecls ignore_prags (mi_decls iface)
257 ; new_eps_insts <- mapM tcIfaceInst (mi_insts iface)
258 ; new_eps_fam_insts <- mapM tcIfaceFamInst (mi_fam_insts iface)
259 ; new_eps_rules <- tcIfaceRules ignore_prags (mi_rules iface)
260 ; new_eps_anns <- tcIfaceAnnotations (mi_anns iface)
261 ; new_eps_vect_info <- tcIfaceVectInfo mod (mkNameEnv new_eps_decls)
264 ; let { final_iface = iface {
265 mi_decls = panic "No mi_decls in PIT",
266 mi_insts = panic "No mi_insts in PIT",
267 mi_fam_insts = panic "No mi_fam_insts in PIT",
268 mi_rules = panic "No mi_rules in PIT",
269 mi_anns = panic "No mi_anns in PIT"
273 ; updateEps_ $ \ eps ->
275 eps_PIT = extendModuleEnv (eps_PIT eps) mod final_iface,
276 eps_PTE = addDeclsToPTE (eps_PTE eps) new_eps_decls,
277 eps_rule_base = extendRuleBaseList (eps_rule_base eps)
279 eps_inst_env = extendInstEnvList (eps_inst_env eps)
281 eps_fam_inst_env = extendFamInstEnvList (eps_fam_inst_env eps)
283 eps_vect_info = plusVectInfo (eps_vect_info eps)
285 eps_ann_env = extendAnnEnvList (eps_ann_env eps)
290 extendFamInstEnvList emptyFamInstEnv
293 extendModuleEnv (eps_mod_fam_inst_env eps)
296 eps_stats = addEpsInStats (eps_stats eps)
297 (length new_eps_decls)
298 (length new_eps_insts)
299 (length new_eps_rules) }
301 ; return (Succeeded final_iface)
305 Used to be used for the loadInterface sanity check on system imports. That has been removed, but I'm leaving this in pending
306 review of this decision by SPJ - MCB 10/2008
308 badDepMsg :: Module -> SDoc
310 = hang (ptext (sLit "Interface file inconsistency:"))
311 2 (sep [ptext (sLit "home-package module") <+> quotes (ppr mod) <+> ptext (sLit "is needed,"),
312 ptext (sLit "but is not listed in the dependencies of the interfaces directly imported by the module being compiled")])
315 -----------------------------------------------------
316 -- Loading type/class/value decls
317 -- We pass the full Module name here, replete with
318 -- its package info, so that we can build a Name for
319 -- each binder with the right package info in it
320 -- All subsequent lookups, including crucially lookups during typechecking
321 -- the declaration itself, will find the fully-glorious Name
323 -- We handle ATs specially. They are not main declarations, but also not
324 -- implict things (in particular, adding them to `implicitTyThings' would mess
325 -- things up in the renaming/type checking of source programs).
326 -----------------------------------------------------
328 addDeclsToPTE :: PackageTypeEnv -> [(Name,TyThing)] -> PackageTypeEnv
329 addDeclsToPTE pte things = extendNameEnvList pte things
332 -> [(Fingerprint, IfaceDecl)]
333 -> IfL [(Name,TyThing)]
334 loadDecls ignore_prags ver_decls
335 = do { mod <- getIfModule
336 ; thingss <- mapM (loadDecl ignore_prags mod) ver_decls
337 ; return (concat thingss)
340 loadDecl :: Bool -- Don't load pragmas into the decl pool
342 -> (Fingerprint, IfaceDecl)
343 -> IfL [(Name,TyThing)] -- The list can be poked eagerly, but the
344 -- TyThings are forkM'd thunks
345 loadDecl ignore_prags mod (_version, decl)
346 = do { -- Populate the name cache with final versions of all
347 -- the names associated with the decl
348 main_name <- lookupOrig mod (ifName decl)
349 -- ; traceIf (text "Loading decl for " <> ppr main_name)
350 ; implicit_names <- mapM (lookupOrig mod) (ifaceDeclSubBndrs decl)
352 -- Typecheck the thing, lazily
353 -- NB. Firstly, the laziness is there in case we never need the
354 -- declaration (in one-shot mode), and secondly it is there so that
355 -- we don't look up the occurrence of a name before calling mk_new_bndr
356 -- on the binder. This is important because we must get the right name
357 -- which includes its nameParent.
359 ; thing <- forkM doc $ do { bumpDeclStats main_name
360 ; tcIfaceDecl ignore_prags decl }
362 -- Populate the type environment with the implicitTyThings too.
364 -- Note [Tricky iface loop]
365 -- ~~~~~~~~~~~~~~~~~~~~~~~~
366 -- Summary: The delicate point here is that 'mini-env' must be
367 -- buildable from 'thing' without demanding any of the things
368 -- 'forkM'd by tcIfaceDecl.
370 -- In more detail: Consider the example
371 -- data T a = MkT { x :: T a }
372 -- The implicitTyThings of T are: [ <datacon MkT>, <selector x>]
373 -- (plus their workers, wrappers, coercions etc etc)
375 -- We want to return an environment
376 -- [ "MkT" -> <datacon MkT>, "x" -> <selector x>, ... ]
377 -- (where the "MkT" is the *Name* associated with MkT, etc.)
379 -- We do this by mapping the implict_names to the associated
380 -- TyThings. By the invariant on ifaceDeclSubBndrs and
381 -- implicitTyThings, we can use getOccName on the implicit
382 -- TyThings to make this association: each Name's OccName should
383 -- be the OccName of exactly one implictTyThing. So the key is
384 -- to define a "mini-env"
386 -- [ 'MkT' -> <datacon MkT>, 'x' -> <selector x>, ... ]
387 -- where the 'MkT' here is the *OccName* associated with MkT.
389 -- However, there is a subtlety: due to how type checking needs
390 -- to be staged, we can't poke on the forkM'd thunks inside the
391 -- implictTyThings while building this mini-env.
392 -- If we poke these thunks too early, two problems could happen:
393 -- (1) When processing mutually recursive modules across
394 -- hs-boot boundaries, poking too early will do the
395 -- type-checking before the recursive knot has been tied,
396 -- so things will be type-checked in the wrong
397 -- environment, and necessary variables won't be in
400 -- (2) Looking up one OccName in the mini_env will cause
401 -- others to be looked up, which might cause that
402 -- original one to be looked up again, and hence loop.
404 -- The code below works because of the following invariant:
405 -- getOccName on a TyThing does not force the suspended type
406 -- checks in order to extract the name. For example, we don't
407 -- poke on the "T a" type of <selector x> on the way to
408 -- extracting <selector x>'s OccName. Of course, there is no
409 -- reason in principle why getting the OccName should force the
410 -- thunks, but this means we need to be careful in
411 -- implicitTyThings and its helper functions.
413 -- All a bit too finely-balanced for my liking.
415 -- This mini-env and lookup function mediates between the
416 --'Name's n and the map from 'OccName's to the implicit TyThings
417 ; let mini_env = mkOccEnv [(getOccName t, t) | t <- implicitTyThings thing]
418 lookup n = case lookupOccEnv mini_env (getOccName n) of
421 pprPanic "loadDecl" (ppr main_name <+> ppr n $$ ppr (decl))
423 ; return $ (main_name, thing) :
424 -- uses the invariant that implicit_names and
425 -- implictTyThings are bijective
426 [(n, lookup n) | n <- implicit_names]
429 doc = ptext (sLit "Declaration for") <+> ppr (ifName decl)
431 bumpDeclStats :: Name -> IfL () -- Record that one more declaration has actually been used
433 = do { traceIf (text "Loading decl for" <+> ppr name)
434 ; updateEps_ (\eps -> let stats = eps_stats eps
435 in eps { eps_stats = stats { n_decls_out = n_decls_out stats + 1 } })
440 %*********************************************************
442 \subsection{Reading an interface file}
444 %*********************************************************
447 findAndReadIface :: SDoc -> Module
448 -> IsBootInterface -- True <=> Look for a .hi-boot file
449 -- False <=> Look for .hi file
450 -> TcRnIf gbl lcl (MaybeErr Message (ModIface, FilePath))
451 -- Nothing <=> file not found, or unreadable, or illegible
452 -- Just x <=> successfully found and parsed
454 -- It *doesn't* add an error to the monad, because
455 -- sometimes it's ok to fail... see notes with loadInterface
457 findAndReadIface doc_str mod hi_boot_file
458 = do { traceIf (sep [hsep [ptext (sLit "Reading"),
460 then ptext (sLit "[boot]")
462 ptext (sLit "interface for"),
464 nest 4 (ptext (sLit "reason:") <+> doc_str)])
466 -- Check for GHC.Prim, and return its static interface
469 then return (Succeeded (ghcPrimIface,
470 "<built in interface for GHC.Prim>"))
474 ; hsc_env <- getTopEnv
475 ; mb_found <- liftIO (findExactModule hsc_env mod)
480 -- Found file, so read it
481 { let { file_path = addBootSuffix_maybe hi_boot_file (ml_hi_file loc) }
483 -- If the interface is in the current package then if we could
484 -- load it would already be in the HPT and we assume that our
485 -- callers checked that.
486 ; if thisPackage dflags == modulePackageId mod
487 && not (isOneShot (ghcMode dflags))
488 then return (Failed (homeModError mod loc))
491 ; traceIf (ptext (sLit "readIFace") <+> text file_path)
492 ; read_result <- readIface mod file_path hi_boot_file
493 ; case read_result of
494 Failed err -> return (Failed (badIfaceFile file_path err))
496 | mi_module iface /= mod ->
497 return (Failed (wrongIfaceModErr iface mod file_path))
499 return (Succeeded (iface, file_path))
500 -- Don't forget to fill in the package name...
503 { traceIf (ptext (sLit "...not found"))
505 ; return (Failed (cannotFindInterface dflags
506 (moduleName mod) err)) }
511 @readIface@ tries just the one file.
514 readIface :: Module -> FilePath -> IsBootInterface
515 -> TcRnIf gbl lcl (MaybeErr Message ModIface)
516 -- Failed err <=> file not found, or unreadable, or illegible
517 -- Succeeded iface <=> successfully found and parsed
519 readIface wanted_mod file_path _
520 = do { res <- tryMostM $
521 readBinIface CheckHiWay QuietBinIFaceReading file_path
524 | wanted_mod == actual_mod -> return (Succeeded iface)
525 | otherwise -> return (Failed err)
527 actual_mod = mi_module iface
528 err = hiModuleNameMismatchWarn wanted_mod actual_mod
530 Left exn -> return (Failed (text (showException exn)))
535 %*********************************************************
537 Wired-in interface for GHC.Prim
539 %*********************************************************
542 initExternalPackageState :: ExternalPackageState
543 initExternalPackageState
545 eps_is_boot = emptyUFM,
546 eps_PIT = emptyPackageIfaceTable,
547 eps_PTE = emptyTypeEnv,
548 eps_inst_env = emptyInstEnv,
549 eps_fam_inst_env = emptyFamInstEnv,
550 eps_rule_base = mkRuleBase builtinRules,
551 -- Initialise the EPS rule pool with the built-in rules
554 eps_vect_info = noVectInfo,
555 eps_ann_env = emptyAnnEnv,
556 eps_stats = EpsStats { n_ifaces_in = 0, n_decls_in = 0, n_decls_out = 0
557 , n_insts_in = 0, n_insts_out = 0
558 , n_rules_in = length builtinRules, n_rules_out = 0 }
563 %*********************************************************
565 Wired-in interface for GHC.Prim
567 %*********************************************************
570 ghcPrimIface :: ModIface
572 = (emptyModIface gHC_PRIM) {
573 mi_exports = [(gHC_PRIM, ghcPrimExports)],
575 mi_fixities = fixities,
576 mi_fix_fn = mkIfaceFixCache fixities
579 fixities = [(getOccName seqId, Fixity 0 InfixR)]
583 %*********************************************************
585 \subsection{Statistics}
587 %*********************************************************
590 ifaceStats :: ExternalPackageState -> SDoc
592 = hcat [text "Renamer stats: ", msg]
594 stats = eps_stats eps
596 [int (n_ifaces_in stats) <+> text "interfaces read",
597 hsep [ int (n_decls_out stats), text "type/class/variable imported, out of",
598 int (n_decls_in stats), text "read"],
599 hsep [ int (n_insts_out stats), text "instance decls imported, out of",
600 int (n_insts_in stats), text "read"],
601 hsep [ int (n_rules_out stats), text "rule decls imported, out of",
602 int (n_rules_in stats), text "read"]
607 %************************************************************************
611 %************************************************************************
614 -- | Read binary interface, and print it out
615 showIface :: HscEnv -> FilePath -> IO ()
616 showIface hsc_env filename = do
617 -- skip the hi way check; we don't want to worry about profiled vs.
618 -- non-profiled interfaces, for example.
619 iface <- initTcRnIf 's' hsc_env () () $
620 readBinIface IgnoreHiWay TraceBinIFaceReading filename
621 printDump (pprModIface iface)
625 pprModIface :: ModIface -> SDoc
628 = vcat [ ptext (sLit "interface")
629 <+> ppr (mi_module iface) <+> pp_boot
630 <+> (if mi_orphan iface then ptext (sLit "[orphan module]") else empty)
631 <+> (if mi_finsts iface then ptext (sLit "[family instance module]") else empty)
632 <+> (if mi_hpc iface then ptext (sLit "[hpc]") else empty)
633 <+> integer opt_HiVersion
634 , nest 2 (text "interface hash:" <+> ppr (mi_iface_hash iface))
635 , nest 2 (text "ABI hash:" <+> ppr (mi_mod_hash iface))
636 , nest 2 (text "export-list hash:" <+> ppr (mi_exp_hash iface))
637 , nest 2 (text "orphan hash:" <+> ppr (mi_orphan_hash iface))
638 , nest 2 (ptext (sLit "where"))
639 , vcat (map pprExport (mi_exports iface))
640 , pprDeps (mi_deps iface)
641 , vcat (map pprUsage (mi_usages iface))
642 , vcat (map pprIfaceAnnotation (mi_anns iface))
643 , pprFixities (mi_fixities iface)
644 , vcat (map pprIfaceDecl (mi_decls iface))
645 , vcat (map ppr (mi_insts iface))
646 , vcat (map ppr (mi_fam_insts iface))
647 , vcat (map ppr (mi_rules iface))
648 , pprVectInfo (mi_vect_info iface)
649 , ppr (mi_warns iface)
652 pp_boot | mi_boot iface = ptext (sLit "[boot]")
656 When printing export lists, we print like this:
658 AvailTC C [C, x, y] C(x,y)
659 AvailTC C [x, y] C!(x,y) -- Exporting x, y but not C
662 pprExport :: IfaceExport -> SDoc
663 pprExport (mod, items)
664 = hsep [ ptext (sLit "export"), ppr mod, hsep (map pp_avail items) ]
666 pp_avail :: GenAvailInfo OccName -> SDoc
667 pp_avail (Avail occ) = ppr occ
668 pp_avail (AvailTC _ []) = empty
669 pp_avail (AvailTC n (n':ns))
670 | n==n' = ppr n <> pp_export ns
671 | otherwise = ppr n <> char '|' <> pp_export (n':ns)
674 pp_export names = braces (hsep (map ppr names))
676 pprUsage :: Usage -> SDoc
677 pprUsage usage@UsagePackageModule{}
678 = hsep [ptext (sLit "import"), ppr (usg_mod usage),
679 ppr (usg_mod_hash usage)]
680 pprUsage usage@UsageHomeModule{}
681 = hsep [ptext (sLit "import"), ppr (usg_mod_name usage),
682 ppr (usg_mod_hash usage)] $$
684 maybe empty (\v -> text "exports: " <> ppr v) (usg_exports usage) $$
685 vcat [ ppr n <+> ppr v | (n,v) <- usg_entities usage ]
688 pprDeps :: Dependencies -> SDoc
689 pprDeps (Deps { dep_mods = mods, dep_pkgs = pkgs, dep_orphs = orphs,
690 dep_finsts = finsts })
691 = vcat [ptext (sLit "module dependencies:") <+> fsep (map ppr_mod mods),
692 ptext (sLit "package dependencies:") <+> fsep (map ppr pkgs),
693 ptext (sLit "orphans:") <+> fsep (map ppr orphs),
694 ptext (sLit "family instance modules:") <+> fsep (map ppr finsts)
697 ppr_mod (mod_name, boot) = ppr mod_name <+> ppr_boot boot
698 ppr_boot True = text "[boot]"
699 ppr_boot False = empty
701 pprIfaceDecl :: (Fingerprint, IfaceDecl) -> SDoc
702 pprIfaceDecl (ver, decl)
703 = ppr ver $$ nest 2 (ppr decl)
705 pprFixities :: [(OccName, Fixity)] -> SDoc
706 pprFixities [] = empty
707 pprFixities fixes = ptext (sLit "fixities") <+> pprWithCommas pprFix fixes
709 pprFix (occ,fix) = ppr fix <+> ppr occ
711 pprVectInfo :: IfaceVectInfo -> SDoc
712 pprVectInfo (IfaceVectInfo { ifaceVectInfoVar = vars
713 , ifaceVectInfoTyCon = tycons
714 , ifaceVectInfoTyConReuse = tyconsReuse
717 [ ptext (sLit "vectorised variables:") <+> hsep (map ppr vars)
718 , ptext (sLit "vectorised tycons:") <+> hsep (map ppr tycons)
719 , ptext (sLit "vectorised reused tycons:") <+> hsep (map ppr tyconsReuse)
722 instance Outputable Warnings where
725 pprWarns :: Warnings -> SDoc
726 pprWarns NoWarnings = empty
727 pprWarns (WarnAll txt) = ptext (sLit "Warn all") <+> ppr txt
728 pprWarns (WarnSome prs) = ptext (sLit "Warnings")
729 <+> vcat (map pprWarning prs)
730 where pprWarning (name, txt) = ppr name <+> ppr txt
732 pprIfaceAnnotation :: IfaceAnnotation -> SDoc
733 pprIfaceAnnotation (IfaceAnnotation { ifAnnotatedTarget = target, ifAnnotatedValue = serialized })
734 = ppr target <+> ptext (sLit "annotated by") <+> ppr serialized
738 %*********************************************************
742 %*********************************************************
745 badIfaceFile :: String -> SDoc -> SDoc
746 badIfaceFile file err
747 = vcat [ptext (sLit "Bad interface file:") <+> text file,
750 hiModuleNameMismatchWarn :: Module -> Module -> Message
751 hiModuleNameMismatchWarn requested_mod read_mod =
752 withPprStyle defaultUserStyle $
753 -- we want the Modules below to be qualified with package names,
754 -- so reset the PrintUnqualified setting.
755 hsep [ ptext (sLit "Something is amiss; requested module ")
757 , ptext (sLit "differs from name found in the interface file")
761 wrongIfaceModErr :: ModIface -> Module -> String -> SDoc
762 wrongIfaceModErr iface mod_name file_path
763 = sep [ptext (sLit "Interface file") <+> iface_file,
764 ptext (sLit "contains module") <+> quotes (ppr (mi_module iface)) <> comma,
765 ptext (sLit "but we were expecting module") <+> quotes (ppr mod_name),
766 sep [ptext (sLit "Probable cause: the source code which generated"),
768 ptext (sLit "has an incompatible module name")
771 where iface_file = doubleQuotes (text file_path)
773 homeModError :: Module -> ModLocation -> SDoc
774 homeModError mod location
775 = ptext (sLit "attempting to use module ") <> quotes (ppr mod)
776 <> (case ml_hs_file location of
777 Just file -> space <> parens (text file)
779 <+> ptext (sLit "which is not loaded")