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(..))
58 %************************************************************************
60 loadSrcInterface, loadOrphanModules, loadHomeInterface
62 These three are called from TcM-land
64 %************************************************************************
67 -- | Load the interface corresponding to an @import@ directive in
68 -- source code. On a failure, fail in the monad with an error message.
69 loadSrcInterface :: SDoc
71 -> IsBootInterface -- {-# SOURCE #-} ?
72 -> Maybe FastString -- "package", if any
75 loadSrcInterface doc mod want_boot maybe_pkg = do
76 -- We must first find which Module this import refers to. This involves
77 -- calling the Finder, which as a side effect will search the filesystem
78 -- and create a ModLocation. If successful, loadIface will read the
79 -- interface; it will call the Finder again, but the ModLocation will be
80 -- cached from the first search.
82 res <- liftIO $ findImportedModule hsc_env mod maybe_pkg
85 mb_iface <- initIfaceTcRn $ loadInterface doc mod (ImportByUser want_boot)
87 Failed err -> failWithTc err
88 Succeeded iface -> return iface
90 let dflags = hsc_dflags hsc_env in
91 failWithTc (cannotFindInterface dflags mod err)
93 -- | Load interfaces for a collection of orphan modules.
94 loadOrphanModules :: [Module] -- the modules
95 -> Bool -- these are family instance-modules
97 loadOrphanModules mods isFamInstMod
98 | null mods = return ()
99 | otherwise = initIfaceTcRn $
100 do { traceIf (text "Loading orphan modules:" <+>
105 load mod = loadSysInterface (mk_doc mod) mod
107 | isFamInstMod = ppr mod <+> ptext (sLit "is a family-instance module")
108 | otherwise = ppr mod <+> ptext (sLit "is a orphan-instance module")
110 -- | Loads the interface for a given Name.
111 loadInterfaceForName :: SDoc -> Name -> TcRn ModIface
112 loadInterfaceForName doc name
115 -- Should not be called with a name from the module being compiled
116 { this_mod <- getModule
117 ; MASSERT2( not (nameIsLocalOrFrom this_mod name), ppr name <+> parens doc )
119 ; ASSERT2( isExternalName name, ppr name )
120 initIfaceTcRn $ loadSysInterface doc (nameModule name)
123 -- | An 'IfM' function to load the home interface for a wired-in thing,
124 -- so that we're sure that we see its instance declarations and rules
125 -- See Note [Loading instances for wired-in things] in TcIface
126 loadWiredInHomeIface :: Name -> IfM lcl ()
127 loadWiredInHomeIface name
128 = ASSERT( isWiredInName name )
129 do _ <- loadSysInterface doc (nameModule name); return ()
131 doc = ptext (sLit "Need home interface for wired-in thing") <+> ppr name
133 -- | Loads a system interface and throws an exception if it fails
134 loadSysInterface :: SDoc -> Module -> IfM lcl ModIface
135 loadSysInterface doc mod_name = loadInterfaceWithException doc mod_name ImportBySystem
137 -- | Loads a user interface and throws an exception if it fails. The first parameter indicates
138 -- whether we should import the boot variant of the module
139 loadUserInterface :: Bool -> SDoc -> Module -> IfM lcl ModIface
140 loadUserInterface is_boot doc mod_name = loadInterfaceWithException doc mod_name (ImportByUser is_boot)
142 -- | A wrapper for 'loadInterface' that throws an exception if it fails
143 loadInterfaceWithException :: SDoc -> Module -> WhereFrom -> IfM lcl ModIface
144 loadInterfaceWithException doc mod_name where_from
145 = do { mb_iface <- loadInterface doc mod_name where_from
147 Failed err -> ghcError (ProgramError (showSDoc err))
148 Succeeded iface -> return iface }
152 %*********************************************************
156 The main function to load an interface
157 for an imported module, and put it in
158 the External Package State
160 %*********************************************************
163 loadInterface :: SDoc -> Module -> WhereFrom
164 -> IfM lcl (MaybeErr Message ModIface)
166 -- loadInterface looks in both the HPT and PIT for the required interface
167 -- If not found, it loads it, and puts it in the PIT (always).
169 -- If it can't find a suitable interface file, we
170 -- a) modify the PackageIfaceTable to have an empty entry
171 -- (to avoid repeated complaints)
172 -- b) return (Left message)
174 -- It's not necessarily an error for there not to be an interface
175 -- file -- perhaps the module has changed, and that interface
178 loadInterface doc_str mod from
179 = do { -- Read the state
180 (eps,hpt) <- getEpsAndHpt
182 ; traceIf (text "Considering whether to load" <+> ppr mod <+> ppr from)
184 -- Check whether we have the interface already
186 ; case lookupIfaceByModule dflags hpt (eps_PIT eps) mod of {
188 -> return (Succeeded iface) ; -- Already loaded
189 -- The (src_imp == mi_boot iface) test checks that the already-loaded
190 -- interface isn't a boot iface. This can conceivably happen,
191 -- if an earlier import had a before we got to real imports. I think.
194 let { hi_boot_file = if thisPackage dflags == modulePackageId mod
196 ImportByUser usr_boot -> usr_boot
197 ImportBySystem -> sys_boot
200 ; mb_dep = lookupUFM (eps_is_boot eps) (moduleName mod)
201 ; sys_boot = case mb_dep of
202 Just (_, is_boot) -> is_boot
204 -- The boot-ness of the requested interface,
205 } -- based on the dependencies in directly-imported modules
207 -- READ THE MODULE IN
208 ; read_result <- findAndReadIface doc_str mod hi_boot_file
209 ; case read_result of {
211 { let fake_iface = emptyModIface mod
213 ; updateEps_ $ \eps ->
214 eps { eps_PIT = extendModuleEnv (eps_PIT eps) (mi_module fake_iface) fake_iface }
215 -- Not found, so add an empty iface to
216 -- the EPS map so that we don't look again
218 ; return (Failed err) } ;
221 -- We used to have a sanity check here that looked for:
222 -- * System importing ..
223 -- * a home package module ..
224 -- * that we know nothing about (mb_dep == Nothing)!
226 -- But this is no longer valid because thNameToGhcName allows users to
227 -- cause the system to load arbitrary interfaces (by supplying an appropriate
228 -- Template Haskell original-name).
229 Succeeded (iface, file_path) ->
232 loc_doc = text file_path
234 initIfaceLcl mod loc_doc $ do
236 -- Load the new ModIface into the External Package State
237 -- Even home-package interfaces loaded by loadInterface
238 -- (which only happens in OneShot mode; in Batch/Interactive
239 -- mode, home-package modules are loaded one by one into the HPT)
240 -- are put in the EPS.
242 -- The main thing is to add the ModIface to the PIT, but
244 -- IfaceDecls, IfaceInst, IfaceFamInst, IfaceRules, IfaceVectInfo
245 -- out of the ModIface and put them into the big EPS pools
247 -- NB: *first* we do loadDecl, so that the provenance of all the locally-defined
248 --- names is done correctly (notably, whether this is an .hi file or .hi-boot file).
249 -- If we do loadExport first the wrong info gets into the cache (unless we
250 -- explicitly tag each export which seems a bit of a bore)
252 ; ignore_prags <- doptM Opt_IgnoreInterfacePragmas
253 ; new_eps_decls <- loadDecls ignore_prags (mi_decls iface)
254 ; new_eps_insts <- mapM tcIfaceInst (mi_insts iface)
255 ; new_eps_fam_insts <- mapM tcIfaceFamInst (mi_fam_insts iface)
256 ; new_eps_rules <- tcIfaceRules ignore_prags (mi_rules iface)
257 ; new_eps_anns <- tcIfaceAnnotations (mi_anns iface)
258 ; new_eps_vect_info <- tcIfaceVectInfo mod (mkNameEnv new_eps_decls)
261 ; let { final_iface = iface {
262 mi_decls = panic "No mi_decls in PIT",
263 mi_insts = panic "No mi_insts in PIT",
264 mi_fam_insts = panic "No mi_fam_insts in PIT",
265 mi_rules = panic "No mi_rules in PIT",
266 mi_anns = panic "No mi_anns in PIT"
270 ; updateEps_ $ \ eps ->
272 eps_PIT = extendModuleEnv (eps_PIT eps) mod final_iface,
273 eps_PTE = addDeclsToPTE (eps_PTE eps) new_eps_decls,
274 eps_rule_base = extendRuleBaseList (eps_rule_base eps)
276 eps_inst_env = extendInstEnvList (eps_inst_env eps)
278 eps_fam_inst_env = extendFamInstEnvList (eps_fam_inst_env eps)
280 eps_vect_info = plusVectInfo (eps_vect_info eps)
282 eps_ann_env = extendAnnEnvList (eps_ann_env eps)
287 extendFamInstEnvList emptyFamInstEnv
290 extendModuleEnv (eps_mod_fam_inst_env eps)
293 eps_stats = addEpsInStats (eps_stats eps)
294 (length new_eps_decls)
295 (length new_eps_insts)
296 (length new_eps_rules) }
298 ; return (Succeeded final_iface)
302 Used to be used for the loadInterface sanity check on system imports. That has been removed, but I'm leaving this in pending
303 review of this decision by SPJ - MCB 10/2008
305 badDepMsg :: Module -> SDoc
307 = hang (ptext (sLit "Interface file inconsistency:"))
308 2 (sep [ptext (sLit "home-package module") <+> quotes (ppr mod) <+> ptext (sLit "is needed,"),
309 ptext (sLit "but is not listed in the dependencies of the interfaces directly imported by the module being compiled")])
312 -----------------------------------------------------
313 -- Loading type/class/value decls
314 -- We pass the full Module name here, replete with
315 -- its package info, so that we can build a Name for
316 -- each binder with the right package info in it
317 -- All subsequent lookups, including crucially lookups during typechecking
318 -- the declaration itself, will find the fully-glorious Name
320 -- We handle ATs specially. They are not main declarations, but also not
321 -- implict things (in particular, adding them to `implicitTyThings' would mess
322 -- things up in the renaming/type checking of source programs).
323 -----------------------------------------------------
325 addDeclsToPTE :: PackageTypeEnv -> [(Name,TyThing)] -> PackageTypeEnv
326 addDeclsToPTE pte things = extendNameEnvList pte things
329 -> [(Fingerprint, IfaceDecl)]
330 -> IfL [(Name,TyThing)]
331 loadDecls ignore_prags ver_decls
332 = do { mod <- getIfModule
333 ; thingss <- mapM (loadDecl ignore_prags mod) ver_decls
334 ; return (concat thingss)
337 loadDecl :: Bool -- Don't load pragmas into the decl pool
339 -> (Fingerprint, IfaceDecl)
340 -> IfL [(Name,TyThing)] -- The list can be poked eagerly, but the
341 -- TyThings are forkM'd thunks
342 loadDecl ignore_prags mod (_version, decl)
343 = do { -- Populate the name cache with final versions of all
344 -- the names associated with the decl
345 main_name <- lookupOrig mod (ifName decl)
346 -- ; traceIf (text "Loading decl for " <> ppr main_name)
347 ; implicit_names <- mapM (lookupOrig mod) (ifaceDeclSubBndrs decl)
349 -- Typecheck the thing, lazily
350 -- NB. Firstly, the laziness is there in case we never need the
351 -- declaration (in one-shot mode), and secondly it is there so that
352 -- we don't look up the occurrence of a name before calling mk_new_bndr
353 -- on the binder. This is important because we must get the right name
354 -- which includes its nameParent.
356 ; thing <- forkM doc $ do { bumpDeclStats main_name
357 ; tcIfaceDecl ignore_prags decl }
359 -- Populate the type environment with the implicitTyThings too.
361 -- Note [Tricky iface loop]
362 -- ~~~~~~~~~~~~~~~~~~~~~~~~
363 -- Summary: The delicate point here is that 'mini-env' must be
364 -- buildable from 'thing' without demanding any of the things
365 -- 'forkM'd by tcIfaceDecl.
367 -- In more detail: Consider the example
368 -- data T a = MkT { x :: T a }
369 -- The implicitTyThings of T are: [ <datacon MkT>, <selector x>]
370 -- (plus their workers, wrappers, coercions etc etc)
372 -- We want to return an environment
373 -- [ "MkT" -> <datacon MkT>, "x" -> <selector x>, ... ]
374 -- (where the "MkT" is the *Name* associated with MkT, etc.)
376 -- We do this by mapping the implict_names to the associated
377 -- TyThings. By the invariant on ifaceDeclSubBndrs and
378 -- implicitTyThings, we can use getOccName on the implicit
379 -- TyThings to make this association: each Name's OccName should
380 -- be the OccName of exactly one implictTyThing. So the key is
381 -- to define a "mini-env"
383 -- [ 'MkT' -> <datacon MkT>, 'x' -> <selector x>, ... ]
384 -- where the 'MkT' here is the *OccName* associated with MkT.
386 -- However, there is a subtlety: due to how type checking needs
387 -- to be staged, we can't poke on the forkM'd thunks inside the
388 -- implictTyThings while building this mini-env.
389 -- If we poke these thunks too early, two problems could happen:
390 -- (1) When processing mutually recursive modules across
391 -- hs-boot boundaries, poking too early will do the
392 -- type-checking before the recursive knot has been tied,
393 -- so things will be type-checked in the wrong
394 -- environment, and necessary variables won't be in
397 -- (2) Looking up one OccName in the mini_env will cause
398 -- others to be looked up, which might cause that
399 -- original one to be looked up again, and hence loop.
401 -- The code below works because of the following invariant:
402 -- getOccName on a TyThing does not force the suspended type
403 -- checks in order to extract the name. For example, we don't
404 -- poke on the "T a" type of <selector x> on the way to
405 -- extracting <selector x>'s OccName. Of course, there is no
406 -- reason in principle why getting the OccName should force the
407 -- thunks, but this means we need to be careful in
408 -- implicitTyThings and its helper functions.
410 -- All a bit too finely-balanced for my liking.
412 -- This mini-env and lookup function mediates between the
413 --'Name's n and the map from 'OccName's to the implicit TyThings
414 ; let mini_env = mkOccEnv [(getOccName t, t) | t <- implicitTyThings thing]
415 lookup n = case lookupOccEnv mini_env (getOccName n) of
418 pprPanic "loadDecl" (ppr main_name <+> ppr n $$ ppr (decl))
420 ; return $ (main_name, thing) :
421 -- uses the invariant that implicit_names and
422 -- implictTyThings are bijective
423 [(n, lookup n) | n <- implicit_names]
426 doc = ptext (sLit "Declaration for") <+> ppr (ifName decl)
428 bumpDeclStats :: Name -> IfL () -- Record that one more declaration has actually been used
430 = do { traceIf (text "Loading decl for" <+> ppr name)
431 ; updateEps_ (\eps -> let stats = eps_stats eps
432 in eps { eps_stats = stats { n_decls_out = n_decls_out stats + 1 } })
437 %*********************************************************
439 \subsection{Reading an interface file}
441 %*********************************************************
444 findAndReadIface :: SDoc -> Module
445 -> IsBootInterface -- True <=> Look for a .hi-boot file
446 -- False <=> Look for .hi file
447 -> TcRnIf gbl lcl (MaybeErr Message (ModIface, FilePath))
448 -- Nothing <=> file not found, or unreadable, or illegible
449 -- Just x <=> successfully found and parsed
451 -- It *doesn't* add an error to the monad, because
452 -- sometimes it's ok to fail... see notes with loadInterface
454 findAndReadIface doc_str mod hi_boot_file
455 = do { traceIf (sep [hsep [ptext (sLit "Reading"),
457 then ptext (sLit "[boot]")
459 ptext (sLit "interface for"),
461 nest 4 (ptext (sLit "reason:") <+> doc_str)])
463 -- Check for GHC.Prim, and return its static interface
466 then return (Succeeded (ghcPrimIface,
467 "<built in interface for GHC.Prim>"))
471 ; hsc_env <- getTopEnv
472 ; mb_found <- liftIO (findExactModule hsc_env mod)
477 -- Found file, so read it
478 { let { file_path = addBootSuffix_maybe hi_boot_file (ml_hi_file loc) }
480 -- If the interface is in the current package then if we could
481 -- load it would already be in the HPT and we assume that our
482 -- callers checked that.
483 ; if thisPackage dflags == modulePackageId mod
484 && not (isOneShot (ghcMode dflags))
485 then return (Failed (homeModError mod loc))
488 ; traceIf (ptext (sLit "readIFace") <+> text file_path)
489 ; read_result <- readIface mod file_path hi_boot_file
490 ; case read_result of
491 Failed err -> return (Failed (badIfaceFile file_path err))
493 | mi_module iface /= mod ->
494 return (Failed (wrongIfaceModErr iface mod file_path))
496 return (Succeeded (iface, file_path))
497 -- Don't forget to fill in the package name...
500 { traceIf (ptext (sLit "...not found"))
502 ; return (Failed (cannotFindInterface dflags
503 (moduleName mod) err)) }
508 @readIface@ tries just the one file.
511 readIface :: Module -> FilePath -> IsBootInterface
512 -> TcRnIf gbl lcl (MaybeErr Message ModIface)
513 -- Failed err <=> file not found, or unreadable, or illegible
514 -- Succeeded iface <=> successfully found and parsed
516 readIface wanted_mod file_path _
517 = do { res <- tryMostM $
518 readBinIface CheckHiWay QuietBinIFaceReading file_path
521 | wanted_mod == actual_mod -> return (Succeeded iface)
522 | otherwise -> return (Failed err)
524 actual_mod = mi_module iface
525 err = hiModuleNameMismatchWarn wanted_mod actual_mod
527 Left exn -> return (Failed (text (showException exn)))
532 %*********************************************************
534 Wired-in interface for GHC.Prim
536 %*********************************************************
539 initExternalPackageState :: ExternalPackageState
540 initExternalPackageState
542 eps_is_boot = emptyUFM,
543 eps_PIT = emptyPackageIfaceTable,
544 eps_PTE = emptyTypeEnv,
545 eps_inst_env = emptyInstEnv,
546 eps_fam_inst_env = emptyFamInstEnv,
547 eps_rule_base = mkRuleBase builtinRules,
548 -- Initialise the EPS rule pool with the built-in rules
551 eps_vect_info = noVectInfo,
552 eps_ann_env = emptyAnnEnv,
553 eps_stats = EpsStats { n_ifaces_in = 0, n_decls_in = 0, n_decls_out = 0
554 , n_insts_in = 0, n_insts_out = 0
555 , n_rules_in = length builtinRules, n_rules_out = 0 }
560 %*********************************************************
562 Wired-in interface for GHC.Prim
564 %*********************************************************
567 ghcPrimIface :: ModIface
569 = (emptyModIface gHC_PRIM) {
570 mi_exports = [(gHC_PRIM, ghcPrimExports)],
572 mi_fixities = fixities,
573 mi_fix_fn = mkIfaceFixCache fixities
576 fixities = [(getOccName seqId, Fixity 0 InfixR)]
580 %*********************************************************
582 \subsection{Statistics}
584 %*********************************************************
587 ifaceStats :: ExternalPackageState -> SDoc
589 = hcat [text "Renamer stats: ", msg]
591 stats = eps_stats eps
593 [int (n_ifaces_in stats) <+> text "interfaces read",
594 hsep [ int (n_decls_out stats), text "type/class/variable imported, out of",
595 int (n_decls_in stats), text "read"],
596 hsep [ int (n_insts_out stats), text "instance decls imported, out of",
597 int (n_insts_in stats), text "read"],
598 hsep [ int (n_rules_out stats), text "rule decls imported, out of",
599 int (n_rules_in stats), text "read"]
604 %************************************************************************
608 %************************************************************************
611 -- | Read binary interface, and print it out
612 showIface :: HscEnv -> FilePath -> IO ()
613 showIface hsc_env filename = do
614 -- skip the hi way check; we don't want to worry about profiled vs.
615 -- non-profiled interfaces, for example.
616 iface <- initTcRnIf 's' hsc_env () () $
617 readBinIface IgnoreHiWay TraceBinIFaceReading filename
618 printDump (pprModIface iface)
622 pprModIface :: ModIface -> SDoc
625 = vcat [ ptext (sLit "interface")
626 <+> ppr (mi_module iface) <+> pp_boot
627 <+> (if mi_orphan iface then ptext (sLit "[orphan module]") else empty)
628 <+> (if mi_finsts iface then ptext (sLit "[family instance module]") else empty)
629 <+> (if mi_hpc iface then ptext (sLit "[hpc]") else empty)
630 <+> integer opt_HiVersion
631 , nest 2 (text "interface hash:" <+> ppr (mi_iface_hash iface))
632 , nest 2 (text "ABI hash:" <+> ppr (mi_mod_hash iface))
633 , nest 2 (text "export-list hash:" <+> ppr (mi_exp_hash iface))
634 , nest 2 (text "orphan hash:" <+> ppr (mi_orphan_hash iface))
635 , nest 2 (ptext (sLit "where"))
636 , vcat (map pprExport (mi_exports iface))
637 , pprDeps (mi_deps iface)
638 , vcat (map pprUsage (mi_usages iface))
639 , vcat (map pprIfaceAnnotation (mi_anns iface))
640 , pprFixities (mi_fixities iface)
641 , vcat (map pprIfaceDecl (mi_decls iface))
642 , vcat (map ppr (mi_insts iface))
643 , vcat (map ppr (mi_fam_insts iface))
644 , vcat (map ppr (mi_rules iface))
645 , pprVectInfo (mi_vect_info iface)
646 , ppr (mi_warns iface)
649 pp_boot | mi_boot iface = ptext (sLit "[boot]")
653 When printing export lists, we print like this:
655 AvailTC C [C, x, y] C(x,y)
656 AvailTC C [x, y] C!(x,y) -- Exporting x, y but not C
659 pprExport :: IfaceExport -> SDoc
660 pprExport (mod, items)
661 = hsep [ ptext (sLit "export"), ppr mod, hsep (map pp_avail items) ]
663 pp_avail :: GenAvailInfo OccName -> SDoc
664 pp_avail (Avail occ) = ppr occ
665 pp_avail (AvailTC _ []) = empty
666 pp_avail (AvailTC n (n':ns))
667 | n==n' = ppr n <> pp_export ns
668 | otherwise = ppr n <> char '|' <> pp_export (n':ns)
671 pp_export names = braces (hsep (map ppr names))
673 pprUsage :: Usage -> SDoc
674 pprUsage usage@UsagePackageModule{}
675 = hsep [ptext (sLit "import"), ppr (usg_mod usage),
676 ppr (usg_mod_hash usage)]
677 pprUsage usage@UsageHomeModule{}
678 = hsep [ptext (sLit "import"), ppr (usg_mod_name usage),
679 ppr (usg_mod_hash usage)] $$
681 maybe empty (\v -> text "exports: " <> ppr v) (usg_exports usage) $$
682 vcat [ ppr n <+> ppr v | (n,v) <- usg_entities usage ]
685 pprDeps :: Dependencies -> SDoc
686 pprDeps (Deps { dep_mods = mods, dep_pkgs = pkgs, dep_orphs = orphs,
687 dep_finsts = finsts })
688 = vcat [ptext (sLit "module dependencies:") <+> fsep (map ppr_mod mods),
689 ptext (sLit "package dependencies:") <+> fsep (map ppr pkgs),
690 ptext (sLit "orphans:") <+> fsep (map ppr orphs),
691 ptext (sLit "family instance modules:") <+> fsep (map ppr finsts)
694 ppr_mod (mod_name, boot) = ppr mod_name <+> ppr_boot boot
695 ppr_boot True = text "[boot]"
696 ppr_boot False = empty
698 pprIfaceDecl :: (Fingerprint, IfaceDecl) -> SDoc
699 pprIfaceDecl (ver, decl)
700 = ppr ver $$ nest 2 (ppr decl)
702 pprFixities :: [(OccName, Fixity)] -> SDoc
703 pprFixities [] = empty
704 pprFixities fixes = ptext (sLit "fixities") <+> pprWithCommas pprFix fixes
706 pprFix (occ,fix) = ppr fix <+> ppr occ
708 pprVectInfo :: IfaceVectInfo -> SDoc
709 pprVectInfo (IfaceVectInfo { ifaceVectInfoVar = vars
710 , ifaceVectInfoTyCon = tycons
711 , ifaceVectInfoTyConReuse = tyconsReuse
714 [ ptext (sLit "vectorised variables:") <+> hsep (map ppr vars)
715 , ptext (sLit "vectorised tycons:") <+> hsep (map ppr tycons)
716 , ptext (sLit "vectorised reused tycons:") <+> hsep (map ppr tyconsReuse)
719 instance Outputable Warnings where
722 pprWarns :: Warnings -> SDoc
723 pprWarns NoWarnings = empty
724 pprWarns (WarnAll txt) = ptext (sLit "Warn all") <+> ppr txt
725 pprWarns (WarnSome prs) = ptext (sLit "Warnings")
726 <+> vcat (map pprWarning prs)
727 where pprWarning (name, txt) = ppr name <+> ppr txt
729 pprIfaceAnnotation :: IfaceAnnotation -> SDoc
730 pprIfaceAnnotation (IfaceAnnotation { ifAnnotatedTarget = target, ifAnnotatedValue = serialized })
731 = ppr target <+> ptext (sLit "annotated by") <+> ppr serialized
735 %*********************************************************
739 %*********************************************************
742 badIfaceFile :: String -> SDoc -> SDoc
743 badIfaceFile file err
744 = vcat [ptext (sLit "Bad interface file:") <+> text file,
747 hiModuleNameMismatchWarn :: Module -> Module -> Message
748 hiModuleNameMismatchWarn requested_mod read_mod =
749 withPprStyle defaultUserStyle $
750 -- we want the Modules below to be qualified with package names,
751 -- so reset the PrintUnqualified setting.
752 hsep [ ptext (sLit "Something is amiss; requested module ")
754 , ptext (sLit "differs from name found in the interface file")
758 wrongIfaceModErr :: ModIface -> Module -> String -> SDoc
759 wrongIfaceModErr iface mod_name file_path
760 = sep [ptext (sLit "Interface file") <+> iface_file,
761 ptext (sLit "contains module") <+> quotes (ppr (mi_module iface)) <> comma,
762 ptext (sLit "but we were expecting module") <+> quotes (ppr mod_name),
763 sep [ptext (sLit "Probable cause: the source code which generated"),
765 ptext (sLit "has an incompatible module name")
768 where iface_file = doubleQuotes (text file_path)
770 homeModError :: Module -> ModLocation -> SDoc
771 homeModError mod location
772 = ptext (sLit "attempting to use module ") <> quotes (ppr mod)
773 <> (case ml_hs_file location of
774 Just file -> space <> parens (text file)
776 <+> ptext (sLit "which is not loaded")