2 % (c) The University of Glasgow, 2006
4 \section[HscTypes]{Types for the per-module compiler}
8 -- * Sessions and compilation state
9 Session(..), withSession, modifySession,
11 FinderCache, FindResult(..), ModLocationCache,
12 Target(..), TargetId(..), pprTarget, pprTargetId,
15 ModDetails(..), emptyModDetails,
16 ModGuts(..), CgGuts(..), ModImports(..), ForeignStubs(..),
18 ModSummary(..), ms_mod_name, showModMsg, isBootSummary,
19 msHsFilePath, msHiFilePath, msObjFilePath,
21 HscSource(..), isHsBoot, hscSourceString, -- Re-exported from DriverPhases
23 HomePackageTable, HomeModInfo(..), emptyHomePackageTable,
24 hptInstances, hptRules, hptVectInfo,
26 ExternalPackageState(..), EpsStats(..), addEpsInStats,
27 PackageTypeEnv, PackageIfaceTable, emptyPackageIfaceTable,
28 lookupIfaceByModule, emptyModIface,
30 InteractiveContext(..), emptyInteractiveContext,
31 icPrintUnqual, mkPrintUnqualified, extendInteractiveContext,
32 substInteractiveContext,
34 ModIface(..), mkIfaceDepCache, mkIfaceVerCache, mkIfaceFixCache,
37 Deprecs(..), IfaceDeprecs,
39 FixityEnv, FixItem(..), lookupFixity, emptyFixityEnv,
41 implicitTyThings, isImplicitTyThing,
43 TyThing(..), tyThingClass, tyThingTyCon, tyThingDataCon, tyThingId,
44 TypeEnv, lookupType, mkTypeEnv, emptyTypeEnv,
45 extendTypeEnv, extendTypeEnvList, extendTypeEnvWithIds, lookupTypeEnv,
46 typeEnvElts, typeEnvClasses, typeEnvTyCons, typeEnvIds,
49 WhetherHasOrphans, IsBootInterface, Usage(..),
50 Dependencies(..), noDependencies,
51 NameCache(..), OrigNameCache, OrigIParamCache,
52 Avails, availsToNameSet, availsToNameEnv, availName, availNames,
53 GenAvailInfo(..), AvailInfo, RdrAvailInfo,
56 Deprecations, DeprecTxt, plusDeprecs,
58 PackageInstEnv, PackageRuleBase,
61 Linkable(..), isObjectLinkable,
62 Unlinked(..), CompiledByteCode,
63 isObject, nameOfObject, isInterpretable, byteCodeOfObject,
64 HpcInfo(..), noHpcInfo,
67 ModBreaks (..), BreakIndex, emptyModBreaks,
69 -- Vectorisation information
70 VectInfo(..), IfaceVectInfo(..), noVectInfo, plusVectInfo,
74 #include "HsVersions.h"
77 import ByteCodeAsm ( CompiledByteCode )
78 import {-# SOURCE #-} InteractiveEval ( Resume )
81 import RdrName ( GlobalRdrEnv, emptyGlobalRdrEnv, GlobalRdrElt(..),
82 mkRdrUnqual, ImpDeclSpec(..), Provenance(..),
83 ImportSpec(..), lookupGlobalRdrEnv, lookupGRE_RdrName )
84 import Name ( Name, NamedThing, getName, nameOccName, nameModule )
87 import OccName ( OccName, OccEnv, lookupOccEnv, mkOccEnv, emptyOccEnv,
90 import InstEnv ( InstEnv, Instance )
91 import FamInstEnv ( FamInstEnv, FamInst )
92 import Rules ( RuleBase )
93 import CoreSyn ( CoreBind )
96 import Var hiding ( setIdType )
100 import Class ( Class, classSelIds, classATs, classTyCon )
102 import DataCon ( DataCon, dataConImplicitIds )
103 import PrelNames ( gHC_PRIM )
104 import Packages ( PackageId )
105 import DynFlags ( DynFlags(..), isOneShot, HscTarget (..) )
106 import DriverPhases ( HscSource(..), isHsBoot, hscSourceString, Phase )
107 import BasicTypes ( Version, initialVersion, IPName,
108 Fixity, defaultFixity, DeprecTxt )
110 import FiniteMap ( FiniteMap )
111 import CoreSyn ( CoreRule )
112 import Maybes ( orElse, expectJust, catMaybes, seqMaybe )
115 import SrcLoc ( SrcSpan, Located )
116 import UniqFM ( lookupUFM, eltsUFM, emptyUFM )
117 import UniqSupply ( UniqSupply )
118 import FastString ( FastString )
119 import StringBuffer ( StringBuffer )
121 import System.Time ( ClockTime )
123 import Data.Array ( Array, array )
128 %************************************************************************
130 \subsection{Compilation environment}
132 %************************************************************************
136 -- | The Session is a handle to the complete state of a compilation
137 -- session. A compilation session consists of a set of modules
138 -- constituting the current program or library, the context for
139 -- interactive evaluation, and various caches.
140 newtype Session = Session (IORef HscEnv)
142 withSession :: Session -> (HscEnv -> IO a) -> IO a
143 withSession (Session ref) f = do h <- readIORef ref; f h
145 modifySession :: Session -> (HscEnv -> HscEnv) -> IO ()
146 modifySession (Session ref) f = do h <- readIORef ref; writeIORef ref $! f h
149 HscEnv is like Session, except that some of the fields are immutable.
150 An HscEnv is used to compile a single module from plain Haskell source
151 code (after preprocessing) to either C, assembly or C--. Things like
152 the module graph don't change during a single compilation.
154 Historical note: "hsc" used to be the name of the compiler binary,
155 when there was a separate driver and compiler. To compile a single
156 module, the driver would invoke hsc on the source code... so nowadays
157 we think of hsc as the layer of the compiler that deals with compiling
163 hsc_dflags :: DynFlags,
164 -- The dynamic flag settings
166 hsc_targets :: [Target],
167 -- The targets (or roots) of the current session
169 hsc_mod_graph :: ModuleGraph,
170 -- The module graph of the current session
172 hsc_IC :: InteractiveContext,
173 -- The context for evaluating interactive statements
175 hsc_HPT :: HomePackageTable,
176 -- The home package table describes already-compiled
177 -- home-packge modules, *excluding* the module we
178 -- are compiling right now.
179 -- (In one-shot mode the current module is the only
180 -- home-package module, so hsc_HPT is empty. All other
181 -- modules count as "external-package" modules.
182 -- However, even in GHCi mode, hi-boot interfaces are
183 -- demand-loadeded into the external-package table.)
185 -- hsc_HPT is not mutable because we only demand-load
186 -- external packages; the home package is eagerly
187 -- loaded, module by module, by the compilation manager.
189 -- The HPT may contain modules compiled earlier by --make
190 -- but not actually below the current module in the dependency
191 -- graph. (This changes a previous invariant: changed Jan 05.)
193 hsc_EPS :: {-# UNPACK #-} !(IORef ExternalPackageState),
194 hsc_NC :: {-# UNPACK #-} !(IORef NameCache),
195 -- These are side-effected by compiling to reflect
196 -- sucking in interface files. They cache the state of
197 -- external interface files, in effect.
199 hsc_FC :: {-# UNPACK #-} !(IORef FinderCache),
200 hsc_MLC :: {-# UNPACK #-} !(IORef ModLocationCache),
201 -- The finder's cache. This caches the location of modules,
202 -- so we don't have to search the filesystem multiple times.
204 hsc_global_rdr_env :: GlobalRdrEnv,
205 hsc_global_type_env :: TypeEnv
208 hscEPS :: HscEnv -> IO ExternalPackageState
209 hscEPS hsc_env = readIORef (hsc_EPS hsc_env)
211 -- | A compilation target.
213 -- A target may be supplied with the actual text of the
214 -- module. If so, use this instead of the file contents (this
215 -- is for use in an IDE where the file hasn't been saved by
217 data Target = Target TargetId (Maybe (StringBuffer,ClockTime))
220 = TargetModule ModuleName
221 -- ^ A module name: search for the file
222 | TargetFile FilePath (Maybe Phase)
223 -- ^ A filename: preprocess & parse it to find the module name.
224 -- If specified, the Phase indicates how to compile this file
225 -- (which phase to start from). Nothing indicates the starting phase
226 -- should be determined from the suffix of the filename.
229 pprTarget :: Target -> SDoc
230 pprTarget (Target id _) = pprTargetId id
232 instance Outputable Target where
235 pprTargetId (TargetModule m) = ppr m
236 pprTargetId (TargetFile f _) = text f
238 instance Outputable TargetId where
241 type HomePackageTable = ModuleNameEnv HomeModInfo
242 -- Domain = modules in the home package
243 -- "home" package name cached here for convenience
244 type PackageIfaceTable = ModuleEnv ModIface
245 -- Domain = modules in the imported packages
247 emptyHomePackageTable = emptyUFM
248 emptyPackageIfaceTable = emptyModuleEnv
251 = HomeModInfo { hm_iface :: !ModIface,
252 hm_details :: !ModDetails,
253 hm_linkable :: !(Maybe Linkable) }
254 -- hm_linkable might be Nothing if:
255 -- a) this is an .hs-boot module
256 -- b) temporarily during compilation if we pruned away
257 -- the old linkable because it was out of date.
258 -- after a complete compilation (GHC.load), all hm_linkable
259 -- fields in the HPT will be Just.
261 -- When re-linking a module (hscNoRecomp), we construct
262 -- the HomModInfo by building a new ModDetails from the
263 -- old ModIface (only).
265 -- | Find the 'ModIface' for a 'Module'
272 lookupIfaceByModule dflags hpt pit mod
273 | modulePackageId mod == thisPackage dflags
274 = -- The module comes from the home package, so look first
275 -- in the HPT. If it's not from the home package it's wrong to look
276 -- in the HPT, because the HPT is indexed by *ModuleName* not Module
277 fmap hm_iface (lookupUFM hpt (moduleName mod))
278 `seqMaybe` lookupModuleEnv pit mod
280 | otherwise = lookupModuleEnv pit mod -- Look in PIT only
282 -- If the module does come from the home package, why do we look in the PIT as well?
283 -- (a) In OneShot mode, even home-package modules accumulate in the PIT
284 -- (b) Even in Batch (--make) mode, there is *one* case where a home-package
285 -- module is in the PIT, namely GHC.Prim when compiling the base package.
286 -- We could eliminate (b) if we wanted, by making GHC.Prim belong to a packake
287 -- of its own, but it doesn't seem worth the bother.
292 hptInstances :: HscEnv -> (ModuleName -> Bool) -> ([Instance], [FamInst])
293 -- Find all the instance declarations (of classes and families) that are in
294 -- modules imported by this one, directly or indirectly, and are in the Home
295 -- Package Table. This ensures that we don't see instances from modules --make
296 -- compiled before this one, but which are not below this one.
297 hptInstances hsc_env want_this_module
298 = let (insts, famInsts) = unzip
299 [ (md_insts details, md_fam_insts details)
300 | mod_info <- eltsUFM (hsc_HPT hsc_env)
301 , want_this_module (moduleName (mi_module (hm_iface mod_info)))
302 , let details = hm_details mod_info ]
304 (concat insts, concat famInsts)
306 hptRules :: HscEnv -> [(ModuleName, IsBootInterface)] -> [CoreRule]
307 -- Get rules from modules "below" this one (in the dependency sense)
308 -- C.f Inst.hptInstances
309 hptRules hsc_env deps
310 | isOneShot (ghcMode (hsc_dflags hsc_env)) = []
313 hpt = hsc_HPT hsc_env
316 | -- Find each non-hi-boot module below me
319 -- unsavoury: when compiling the base package with --make, we
320 -- sometimes try to look up RULES for GHC.Prim. GHC.Prim won't
321 -- be in the HPT, because we never compile it; it's in the EPT
322 -- instead. ToDo: clean up, and remove this slightly bogus
324 , mod /= moduleName gHC_PRIM
326 -- Look it up in the HPT
327 , let rules = case lookupUFM hpt mod of
328 Just info -> md_rules (hm_details info)
329 Nothing -> pprTrace "WARNING in hptRules" msg []
330 msg = vcat [ptext SLIT("missing module") <+> ppr mod,
331 ptext SLIT("Probable cause: out-of-date interface files")]
332 -- This really shouldn't happen, but see Trac #962
337 hptVectInfo :: HscEnv -> VectInfo
338 -- Get the combined VectInfo of all modules in the home package table. In
339 -- contrast to instances and rules, we don't care whether the modules are
340 -- "below" or us. The VectInfo of those modules not "below" us does not
341 -- affect the compilation of the current module.
343 = foldr plusVectInfo noVectInfo [ md_vect_info (hm_details mod_info)
344 | mod_info <- eltsUFM (hsc_HPT hsc_env)]
347 %************************************************************************
349 \subsection{The Finder cache}
351 %************************************************************************
354 -- | The 'FinderCache' maps home module names to the result of
355 -- searching for that module. It records the results of searching for
356 -- modules along the search path. On @:load@, we flush the entire
357 -- contents of this cache.
359 -- Although the @FinderCache@ range is 'FindResult' for convenience ,
360 -- in fact it will only ever contain 'Found' or 'NotFound' entries.
362 type FinderCache = ModuleNameEnv FindResult
364 -- | The result of searching for an imported module.
366 = Found ModLocation Module
367 -- the module was found
368 | NoPackage PackageId
369 -- the requested package was not found
370 | FoundMultiple [PackageId]
371 -- *error*: both in multiple packages
372 | PackageHidden PackageId
373 -- for an explicit source import: the package containing the module is
375 | ModuleHidden PackageId
376 -- for an explicit source import: the package containing the module is
377 -- exposed, but the module itself is hidden.
378 | NotFound [FilePath] (Maybe PackageId)
379 -- the module was not found, the specified places were searched
380 | NotFoundInPackage PackageId
381 -- the module was not found in this package
383 -- | Cache that remembers where we found a particular module. Contains both
384 -- home modules and package modules. On @:load@, only home modules are
385 -- purged from this cache.
386 type ModLocationCache = ModuleEnv ModLocation
389 %************************************************************************
391 \subsection{Symbol tables and Module details}
393 %************************************************************************
395 A @ModIface@ plus a @ModDetails@ summarises everything we know
396 about a compiled module. The @ModIface@ is the stuff *before* linking,
397 and can be written out to an interface file. (The @ModDetails@ is after
398 linking; it is the "linked" form of the mi_decls field.)
400 When we *read* an interface file, we also construct a @ModIface@ from it,
401 except that the mi_decls part is empty; when reading we consolidate
402 the declarations into a single indexed map in the @PersistentRenamerState@.
407 mi_module :: !Module,
408 mi_mod_vers :: !Version, -- Module version: changes when anything changes
410 mi_orphan :: !WhetherHasOrphans, -- Whether this module has orphans
411 mi_finsts :: !WhetherHasFamInst, -- Whether module has family insts
412 mi_boot :: !IsBootInterface, -- Read from an hi-boot file?
414 mi_deps :: Dependencies,
415 -- This is consulted for directly-imported modules,
416 -- but not for anything else (hence lazy)
418 -- Usages; kept sorted so that it's easy to decide
419 -- whether to write a new iface file (changing usages
420 -- doesn't affect the version of this module)
421 mi_usages :: [Usage],
422 -- NOT STRICT! we read this field lazily from the interface file
423 -- It is *only* consulted by the recompilation checker
426 -- Kept sorted by (mod,occ), to make version comparisons easier
427 mi_exports :: ![IfaceExport],
428 mi_exp_vers :: !Version, -- Version number of export list
431 mi_fixities :: [(OccName,Fixity)],
432 -- NOT STRICT! we read this field lazily from the interface file
435 mi_deprecs :: IfaceDeprecs,
436 -- NOT STRICT! we read this field lazily from the interface file
438 -- Type, class and variable declarations
439 -- The version of an Id changes if its fixity or deprecations change
440 -- (as well as its type of course)
441 -- Ditto data constructors, class operations, except that
442 -- the version of the parent class/tycon changes
443 mi_decls :: [(Version,IfaceDecl)], -- Sorted
445 mi_globals :: !(Maybe GlobalRdrEnv),
446 -- Binds all the things defined at the top level in
447 -- the *original source* code for this module. which
448 -- is NOT the same as mi_exports, nor mi_decls (which
449 -- may contains declarations for things not actually
450 -- defined by the user). Used for GHCi and for inspecting
451 -- the contents of modules via the GHC API only.
453 -- (We need the source file to figure out the
454 -- top-level environment, if we didn't compile this module
455 -- from source then this field contains Nothing).
457 -- Strictly speaking this field should live in the
458 -- HomeModInfo, but that leads to more plumbing.
460 -- Instance declarations and rules
461 mi_insts :: [IfaceInst], -- Sorted
462 mi_fam_insts :: [IfaceFamInst], -- Sorted
463 mi_rules :: [IfaceRule], -- Sorted
464 mi_rule_vers :: !Version, -- Version number for rules and
465 -- instances (for classes and families)
468 -- Vectorisation information
469 mi_vect_info :: !IfaceVectInfo,
471 -- Cached environments for easy lookup
472 -- These are computed (lazily) from other fields
473 -- and are not put into the interface file
474 mi_dep_fn :: Name -> Maybe DeprecTxt, -- Cached lookup for mi_deprecs
475 mi_fix_fn :: OccName -> Fixity, -- Cached lookup for mi_fixities
476 mi_ver_fn :: OccName -> Maybe (OccName, Version)
477 -- Cached lookup for mi_decls
478 -- The Nothing in mi_ver_fn means that the thing
479 -- isn't in decls. It's useful to know that when
480 -- seeing if we are up to date wrt the old interface
481 -- The 'OccName' is the parent of the name, if it has one.
484 -- Should be able to construct ModDetails from mi_decls in ModIface
487 -- The next two fields are created by the typechecker
488 md_exports :: [AvailInfo],
489 md_types :: !TypeEnv,
490 md_insts :: ![Instance], -- Dfun-ids for the instances in this module
491 md_fam_insts :: ![FamInst],
492 md_rules :: ![CoreRule], -- Domain may include Ids from other modules
493 md_modBreaks :: !ModBreaks, -- Breakpoint information for this module
494 md_vect_info :: !VectInfo -- Vectorisation information
497 emptyModDetails = ModDetails { md_types = emptyTypeEnv,
502 md_modBreaks = emptyModBreaks,
503 md_vect_info = noVectInfo
506 -- A ModGuts is carried through the compiler, accumulating stuff as it goes
507 -- There is only one ModGuts at any time, the one for the module
508 -- being compiled right now. Once it is compiled, a ModIface and
509 -- ModDetails are extracted and the ModGuts is dicarded.
513 mg_module :: !Module,
514 mg_boot :: IsBootInterface, -- Whether it's an hs-boot module
515 mg_exports :: ![AvailInfo], -- What it exports
516 mg_deps :: !Dependencies, -- What is below it, directly or
518 mg_dir_imps :: ![Module], -- Directly-imported modules; used to
519 -- generate initialisation code
520 mg_usages :: ![Usage], -- Version info for what it needed
522 mg_rdr_env :: !GlobalRdrEnv, -- Top-level lexical environment
523 mg_fix_env :: !FixityEnv, -- Fixity env, for things declared in
526 mg_inst_env :: InstEnv, -- Class instance enviroment fro
527 -- *home-package* modules (including
528 -- this one); c.f. tcg_inst_env
529 mg_fam_inst_env :: FamInstEnv, -- Type-family instance enviroment
530 -- for *home-package* modules (including
531 -- this one); c.f. tcg_fam_inst_env
533 mg_types :: !TypeEnv,
534 mg_insts :: ![Instance], -- Instances
535 mg_fam_insts :: ![FamInst], -- Instances
536 mg_rules :: ![CoreRule], -- Rules from this module
537 mg_binds :: ![CoreBind], -- Bindings for this module
538 mg_foreign :: !ForeignStubs,
539 mg_deprecs :: !Deprecations, -- Deprecations declared in the module
540 mg_hpc_info :: !HpcInfo, -- info about coverage tick boxes
541 mg_modBreaks :: !ModBreaks,
542 mg_vect_info :: !VectInfo -- Pool of vectorised declarations
545 -- The ModGuts takes on several slightly different forms:
547 -- After simplification, the following fields change slightly:
548 -- mg_rules Orphan rules only (local ones now attached to binds)
549 -- mg_binds With rules attached
552 ---------------------------------------------------------
553 -- The Tidy pass forks the information about this module:
554 -- * one lot goes to interface file generation (ModIface)
555 -- and later compilations (ModDetails)
556 -- * the other lot goes to code generation (CgGuts)
559 cg_module :: !Module,
561 cg_tycons :: [TyCon],
562 -- Algebraic data types (including ones that started
563 -- life as classes); generate constructors and info
564 -- tables Includes newtypes, just for the benefit of
567 cg_binds :: [CoreBind],
568 -- The tidied main bindings, including
569 -- previously-implicit bindings for record and class
570 -- selectors, and data construtor wrappers. But *not*
571 -- data constructor workers; reason: we we regard them
572 -- as part of the code-gen of tycons
574 cg_dir_imps :: ![Module],
575 -- Directly-imported modules; used to generate
576 -- initialisation code
578 cg_foreign :: !ForeignStubs,
579 cg_dep_pkgs :: ![PackageId], -- Used to generate #includes for C code gen
580 cg_hpc_info :: !HpcInfo -- info about coverage tick boxes
583 -----------------------------------
586 imp_direct :: ![(Module,Bool)], -- Explicitly-imported modules
587 -- Boolean is true if we imported the whole
588 -- module (apart, perhaps, from hiding some)
589 imp_pkg_mods :: !ModuleSet, -- Non-home-package modules on which we depend,
590 -- directly or indirectly
591 imp_home_names :: !NameSet -- Home package things on which we depend,
592 -- directly or indirectly
595 -----------------------------------
596 data ForeignStubs = NoStubs
598 SDoc -- Header file prototypes for
599 -- "foreign exported" functions
600 SDoc -- C stubs to use when calling
601 -- "foreign exported" functions
602 [FastString] -- Headers that need to be included
603 -- into C code generated for this module
604 [Id] -- Foreign-exported binders
605 -- we have to generate code to register these
610 emptyModIface :: Module -> ModIface
612 = ModIface { mi_module = mod,
613 mi_mod_vers = initialVersion,
617 mi_deps = noDependencies,
620 mi_exp_vers = initialVersion,
622 mi_deprecs = NoDeprecs,
627 mi_globals = Nothing,
628 mi_rule_vers = initialVersion,
629 mi_vect_info = noIfaceVectInfo,
630 mi_dep_fn = emptyIfaceDepCache,
631 mi_fix_fn = emptyIfaceFixCache,
632 mi_ver_fn = emptyIfaceVerCache
637 %************************************************************************
639 \subsection{The interactive context}
641 %************************************************************************
644 data InteractiveContext
645 = InteractiveContext {
646 ic_toplev_scope :: [Module], -- Include the "top-level" scope of
649 ic_exports :: [Module], -- Include just the exports of these
652 ic_rn_gbl_env :: GlobalRdrEnv, -- The cached GlobalRdrEnv, built from
653 -- ic_toplev_scope and ic_exports
655 ic_tmp_ids :: [Id], -- Names bound during interaction.
657 -- earlier ones with the same OccName.
659 ic_tyvars :: TyVarSet -- skolem type variables free in
660 -- ic_tmp_ids. These arise at
661 -- breakpoints in a polymorphic
662 -- context, where we have only partial
666 , ic_resume :: [Resume] -- the stack of breakpoint contexts
671 emptyInteractiveContext
672 = InteractiveContext { ic_toplev_scope = [],
674 ic_rn_gbl_env = emptyGlobalRdrEnv,
676 ic_tyvars = emptyVarSet
682 icPrintUnqual :: InteractiveContext -> PrintUnqualified
683 icPrintUnqual ictxt = mkPrintUnqualified (ic_rn_gbl_env ictxt)
686 extendInteractiveContext
687 :: InteractiveContext
690 -> InteractiveContext
691 extendInteractiveContext ictxt ids tyvars
692 = ictxt { ic_tmp_ids = ic_tmp_ids ictxt ++ ids,
693 -- NB. must be this way around, because we want
694 -- new ids to shadow existing bindings.
695 ic_tyvars = ic_tyvars ictxt `unionVarSet` tyvars }
698 substInteractiveContext :: InteractiveContext -> TvSubst -> InteractiveContext
699 substInteractiveContext ictxt subst | isEmptyTvSubst subst = ictxt
700 substInteractiveContext ictxt@InteractiveContext{ic_tmp_ids=ids} subst =
701 let ids' = map (\id -> id `setIdType` substTy subst (idType id)) ids
702 subst_dom= varEnvKeys$ getTvSubstEnv subst
703 subst_ran= varEnvElts$ getTvSubstEnv subst
704 new_tvs = [ tv | Just tv <- map getTyVar_maybe subst_ran]
705 ic_tyvars'= (`delVarSetListByKey` subst_dom)
706 . (`extendVarSetList` new_tvs)
708 in ictxt { ic_tmp_ids = ids'
709 , ic_tyvars = ic_tyvars' }
711 where delVarSetListByKey = foldl' delVarSetByKey
714 %************************************************************************
716 Building a PrintUnqualified
718 %************************************************************************
721 mkPrintUnqualified :: GlobalRdrEnv -> PrintUnqualified
722 mkPrintUnqualified env = (qual_name, qual_mod)
724 qual_name mod occ -- The (mod,occ) pair is the original name of the thing
725 | [gre] <- unqual_gres, right_name gre = Nothing
726 -- If there's a unique entity that's in scope unqualified with 'occ'
727 -- AND that entity is the right one, then we can use the unqualified name
729 | [gre] <- qual_gres = Just (get_qual_mod (gre_prov gre))
731 | null qual_gres = Just (moduleName mod)
732 -- it isn't in scope at all, this probably shouldn't happen,
733 -- but we'll qualify it by the original module anyway.
735 | otherwise = panic "mkPrintUnqualified"
737 right_name gre = nameModule (gre_name gre) == mod
739 unqual_gres = lookupGRE_RdrName (mkRdrUnqual occ) env
740 qual_gres = filter right_name (lookupGlobalRdrEnv env occ)
742 get_qual_mod LocalDef = moduleName mod
743 get_qual_mod (Imported is) = ASSERT( not (null is) ) is_as (is_decl (head is))
745 qual_mod mod = Nothing -- For now, we never qualify module names with their packages
749 %************************************************************************
753 %************************************************************************
756 implicitTyThings :: TyThing -> [TyThing]
757 -- If you change this, make sure you change LoadIface.ifaceDeclSubBndrs in sync
759 implicitTyThings (AnId id) = []
761 -- For type constructors, add the data cons (and their extras),
762 -- and the selectors and generic-programming Ids too
764 -- Newtypes don't have a worker Id, so don't generate that?
765 implicitTyThings (ATyCon tc) = implicitCoTyCon tc ++
766 map AnId (tyConSelIds tc) ++
767 concatMap (extras_plus . ADataCon)
770 -- For classes, add the class selector Ids, and assoicated TyCons
771 -- and the class TyCon too (and its extras)
772 implicitTyThings (AClass cl)
773 = map AnId (classSelIds cl) ++
774 map ATyCon (classATs cl) ++
775 -- No extras_plus for the classATs, because they
776 -- are only the family decls; they have no implicit things
777 extras_plus (ATyCon (classTyCon cl))
779 -- For data cons add the worker and wrapper (if any)
780 implicitTyThings (ADataCon dc) = map AnId (dataConImplicitIds dc)
782 -- | returns 'True' if there should be no interface-file declaration
783 -- for this thing on its own: either it is built-in, or it is part
784 -- of some other declaration, or it is generated implicitly by some
785 -- other declaration.
786 isImplicitTyThing :: TyThing -> Bool
787 isImplicitTyThing (ADataCon _) = True
788 isImplicitTyThing (AnId id) = isImplicitId id
789 isImplicitTyThing (AClass _) = False
790 isImplicitTyThing (ATyCon tc) = isImplicitTyCon tc
792 -- For newtypes and indexed data types, add the implicit coercion tycon
794 = map ATyCon . catMaybes $ [newTyConCo_maybe tc,
795 tyConFamilyCoercion_maybe tc]
797 extras_plus thing = thing : implicitTyThings thing
799 extendTypeEnvWithIds :: TypeEnv -> [Id] -> TypeEnv
800 extendTypeEnvWithIds env ids
801 = extendNameEnvList env [(getName id, AnId id) | id <- ids]
804 %************************************************************************
808 %************************************************************************
811 type TypeEnv = NameEnv TyThing
813 emptyTypeEnv :: TypeEnv
814 typeEnvElts :: TypeEnv -> [TyThing]
815 typeEnvClasses :: TypeEnv -> [Class]
816 typeEnvTyCons :: TypeEnv -> [TyCon]
817 typeEnvIds :: TypeEnv -> [Id]
818 typeEnvDataCons :: TypeEnv -> [DataCon]
819 lookupTypeEnv :: TypeEnv -> Name -> Maybe TyThing
821 emptyTypeEnv = emptyNameEnv
822 typeEnvElts env = nameEnvElts env
823 typeEnvClasses env = [cl | AClass cl <- typeEnvElts env]
824 typeEnvTyCons env = [tc | ATyCon tc <- typeEnvElts env]
825 typeEnvIds env = [id | AnId id <- typeEnvElts env]
826 typeEnvDataCons env = [dc | ADataCon dc <- typeEnvElts env]
828 mkTypeEnv :: [TyThing] -> TypeEnv
829 mkTypeEnv things = extendTypeEnvList emptyTypeEnv things
831 lookupTypeEnv = lookupNameEnv
833 -- Extend the type environment
834 extendTypeEnv :: TypeEnv -> TyThing -> TypeEnv
835 extendTypeEnv env thing = extendNameEnv env (getName thing) thing
837 extendTypeEnvList :: TypeEnv -> [TyThing] -> TypeEnv
838 extendTypeEnvList env things = foldl extendTypeEnv env things
842 lookupType :: DynFlags
848 lookupType dflags hpt pte name
849 -- in one-shot, we don't use the HPT
850 | not (isOneShot (ghcMode dflags)) && modulePackageId mod == this_pkg
851 = do hm <- lookupUFM hpt (moduleName mod) -- Maybe monad
852 lookupNameEnv (md_types (hm_details hm)) name
854 = lookupNameEnv pte name
855 where mod = nameModule name
856 this_pkg = thisPackage dflags
860 tyThingTyCon (ATyCon tc) = tc
861 tyThingTyCon other = pprPanic "tyThingTyCon" (ppr other)
863 tyThingClass (AClass cls) = cls
864 tyThingClass other = pprPanic "tyThingClass" (ppr other)
866 tyThingDataCon (ADataCon dc) = dc
867 tyThingDataCon other = pprPanic "tyThingDataCon" (ppr other)
869 tyThingId (AnId id) = id
870 tyThingId other = pprPanic "tyThingId" (ppr other)
873 %************************************************************************
875 \subsection{Auxiliary types}
877 %************************************************************************
879 These types are defined here because they are mentioned in ModDetails,
880 but they are mostly elaborated elsewhere
883 mkIfaceVerCache :: [(Version,IfaceDecl)]
884 -> (OccName -> Maybe (OccName, Version))
885 mkIfaceVerCache pairs
886 = \occ -> lookupOccEnv env occ
888 env = foldr add_decl emptyOccEnv pairs
889 add_decl (v,d) env0 = foldr add_imp env1 (ifaceDeclSubBndrs d)
892 env1 = extendOccEnv env0 decl_name (decl_name, v)
893 add_imp bndr env = extendOccEnv env bndr (decl_name, v)
895 emptyIfaceVerCache :: OccName -> Maybe (OccName, Version)
896 emptyIfaceVerCache occ = Nothing
898 ------------------ Deprecations -------------------------
901 | DeprecAll DeprecTxt -- Whole module deprecated
902 | DeprecSome a -- Some specific things deprecated
905 type IfaceDeprecs = Deprecs [(OccName,DeprecTxt)]
906 type Deprecations = Deprecs (NameEnv (OccName,DeprecTxt))
907 -- Keep the OccName so we can flatten the NameEnv to
908 -- get an IfaceDeprecs from a Deprecations
909 -- Only an OccName is needed, because a deprecation always
910 -- applies to things defined in the module in which the
911 -- deprecation appears.
913 mkIfaceDepCache:: IfaceDeprecs -> Name -> Maybe DeprecTxt
914 mkIfaceDepCache NoDeprecs = \n -> Nothing
915 mkIfaceDepCache (DeprecAll t) = \n -> Just t
916 mkIfaceDepCache (DeprecSome pairs) = lookupOccEnv (mkOccEnv pairs) . nameOccName
918 emptyIfaceDepCache :: Name -> Maybe DeprecTxt
919 emptyIfaceDepCache n = Nothing
921 plusDeprecs :: Deprecations -> Deprecations -> Deprecations
922 plusDeprecs d NoDeprecs = d
923 plusDeprecs NoDeprecs d = d
924 plusDeprecs d (DeprecAll t) = DeprecAll t
925 plusDeprecs (DeprecAll t) d = DeprecAll t
926 plusDeprecs (DeprecSome v1) (DeprecSome v2) = DeprecSome (v1 `plusNameEnv` v2)
931 type Avails = [AvailInfo]
932 type AvailInfo = GenAvailInfo Name
933 type RdrAvailInfo = GenAvailInfo OccName
935 data GenAvailInfo name = Avail name -- An ordinary identifier
936 | AvailTC name -- The name of the type or class
937 [name] -- The available pieces of type/class.
938 -- NB: If the type or class is itself
939 -- to be in scope, it must be in this list.
940 -- Thus, typically: AvailTC Eq [Eq, ==, /=]
942 -- Equality used when deciding if the interface has changed
944 type IfaceExport = (Module, [GenAvailInfo OccName])
946 availsToNameSet :: [AvailInfo] -> NameSet
947 availsToNameSet avails = foldr add emptyNameSet avails
948 where add avail set = addListToNameSet set (availNames avail)
950 availsToNameEnv :: [AvailInfo] -> NameEnv AvailInfo
951 availsToNameEnv avails = foldr add emptyNameEnv avails
952 where add avail env = extendNameEnvList env
953 (zip (availNames avail) (repeat avail))
955 availName :: GenAvailInfo name -> name
956 availName (Avail n) = n
957 availName (AvailTC n _) = n
959 availNames :: GenAvailInfo name -> [name]
960 availNames (Avail n) = [n]
961 availNames (AvailTC n ns) = ns
963 instance Outputable n => Outputable (GenAvailInfo n) where
966 pprAvail :: Outputable n => GenAvailInfo n -> SDoc
967 pprAvail (Avail n) = ppr n
968 pprAvail (AvailTC n ns) = ppr n <> braces (hsep (punctuate comma (map ppr ns)))
972 mkIfaceFixCache :: [(OccName, Fixity)] -> OccName -> Fixity
973 mkIfaceFixCache pairs
974 = \n -> lookupOccEnv env n `orElse` defaultFixity
978 emptyIfaceFixCache :: OccName -> Fixity
979 emptyIfaceFixCache n = defaultFixity
981 -- This fixity environment is for source code only
982 type FixityEnv = NameEnv FixItem
984 -- We keep the OccName in the range so that we can generate an interface from it
985 data FixItem = FixItem OccName Fixity SrcSpan
987 instance Outputable FixItem where
988 ppr (FixItem occ fix loc) = ppr fix <+> ppr occ <+> parens (ppr loc)
990 emptyFixityEnv :: FixityEnv
991 emptyFixityEnv = emptyNameEnv
993 lookupFixity :: FixityEnv -> Name -> Fixity
994 lookupFixity env n = case lookupNameEnv env n of
995 Just (FixItem _ fix _) -> fix
996 Nothing -> defaultFixity
1000 %************************************************************************
1002 \subsection{WhatsImported}
1004 %************************************************************************
1007 type WhetherHasOrphans = Bool
1009 -- * an instance decl in a module other than the defn module for
1010 -- one of the tycons or classes in the instance head
1011 -- * a transformation rule in a module other than the one defining
1012 -- the function in the head of the rule.
1014 type WhetherHasFamInst = Bool -- This module defines family instances?
1016 type IsBootInterface = Bool
1018 -- Dependency info about modules and packages below this one
1019 -- in the import hierarchy. See TcRnTypes.ImportAvails for details.
1020 -- The orphan modules in `dep_orphs' do *not* include family instance orphans,
1021 -- as they are anyway included in `dep_finsts'.
1023 -- Invariant: the dependencies of a module M never includes M
1024 -- Invariant: the lists are unordered, with no duplicates
1026 = Deps { dep_mods :: [(ModuleName, -- Home-package module dependencies
1028 , dep_pkgs :: [PackageId] -- External package dependencies
1029 , dep_orphs :: [Module] -- Orphan modules (whether home or
1031 , dep_finsts :: [Module] -- Modules that contain family
1032 -- instances (whether home or
1036 -- Equality used only for old/new comparison in MkIface.addVersionInfo
1038 noDependencies :: Dependencies
1039 noDependencies = Deps [] [] [] []
1042 = Usage { usg_name :: ModuleName, -- Name of the module
1043 usg_mod :: Version, -- Module version
1044 usg_entities :: [(OccName,Version)], -- Sorted by occurrence name
1045 -- NB. usages are for parent names only, eg. tycon but not constructors.
1046 usg_exports :: Maybe Version, -- Export-list version, if we depend on it
1047 usg_rules :: Version -- Orphan-rules version (for non-orphan
1048 -- modules this will always be initialVersion)
1050 -- This type doesn't let you say "I imported f but none of the rules in
1051 -- the module". If you use anything in the module you get its rule version
1052 -- So if the rules change, you'll recompile, even if you don't use them.
1053 -- This is easy to implement, and it's safer: you might not have used the rules last
1054 -- time round, but if someone has added a new rule you might need it this time
1056 -- The export list field is (Just v) if we depend on the export list:
1057 -- i.e. we imported the module directly, whether or not we
1058 -- enumerated the things we imported, or just imported everything
1059 -- We need to recompile if M's exports change, because
1060 -- if the import was import M, we might now have a name clash in the
1061 -- importing module.
1062 -- if the import was import M(x) M might no longer export x
1063 -- The only way we don't depend on the export list is if we have
1065 -- And of course, for modules that aren't imported directly we don't
1066 -- depend on their export lists
1070 %************************************************************************
1072 The External Package State
1074 %************************************************************************
1077 type PackageTypeEnv = TypeEnv
1078 type PackageRuleBase = RuleBase
1079 type PackageInstEnv = InstEnv
1080 type PackageFamInstEnv = FamInstEnv
1081 type PackageVectInfo = VectInfo
1083 data ExternalPackageState
1085 eps_is_boot :: !(ModuleNameEnv (ModuleName, IsBootInterface)),
1086 -- In OneShot mode (only), home-package modules
1087 -- accumulate in the external package state, and are
1088 -- sucked in lazily. For these home-pkg modules
1089 -- (only) we need to record which are boot modules.
1090 -- We set this field after loading all the
1091 -- explicitly-imported interfaces, but before doing
1094 -- The ModuleName part is not necessary, but it's useful for
1095 -- debug prints, and it's convenient because this field comes
1096 -- direct from TcRnTypes.ImportAvails.imp_dep_mods
1098 eps_PIT :: !PackageIfaceTable,
1099 -- The ModuleIFaces for modules in external packages
1100 -- whose interfaces we have opened
1101 -- The declarations in these interface files are held in
1102 -- eps_decls, eps_inst_env, eps_fam_inst_env, eps_rules
1103 -- (below), not in the mi_decls fields of the iPIT.
1104 -- What _is_ in the iPIT is:
1111 eps_PTE :: !PackageTypeEnv, -- Domain = external-package modules
1113 eps_inst_env :: !PackageInstEnv, -- The total InstEnv accumulated
1114 -- from all the external-package
1116 eps_fam_inst_env :: !PackageFamInstEnv,-- Ditto FamInstEnv
1117 eps_rule_base :: !PackageRuleBase, -- Ditto RuleEnv
1118 eps_vect_info :: !PackageVectInfo, -- Ditto VectInfo
1120 eps_mod_fam_inst_env :: !(ModuleEnv FamInstEnv), -- identifies family
1121 -- instances of each mod
1122 eps_stats :: !EpsStats
1125 -- "In" means read from iface files
1126 -- "Out" means actually sucked in and type-checked
1127 data EpsStats = EpsStats { n_ifaces_in
1128 , n_decls_in, n_decls_out
1129 , n_rules_in, n_rules_out
1130 , n_insts_in, n_insts_out :: !Int }
1132 addEpsInStats :: EpsStats -> Int -> Int -> Int -> EpsStats
1133 -- Add stats for one newly-read interface
1134 addEpsInStats stats n_decls n_insts n_rules
1135 = stats { n_ifaces_in = n_ifaces_in stats + 1
1136 , n_decls_in = n_decls_in stats + n_decls
1137 , n_insts_in = n_insts_in stats + n_insts
1138 , n_rules_in = n_rules_in stats + n_rules }
1141 The NameCache makes sure that there is just one Unique assigned for
1142 each original name; i.e. (module-name, occ-name) pair. The Name is
1143 always stored as a Global, and has the SrcLoc of its binding location.
1144 Actually that's not quite right. When we first encounter the original
1145 name, we might not be at its binding site (e.g. we are reading an
1146 interface file); so we give it 'noSrcLoc' then. Later, when we find
1147 its binding site, we fix it up.
1151 = NameCache { nsUniqs :: UniqSupply,
1152 -- Supply of uniques
1153 nsNames :: OrigNameCache,
1154 -- Ensures that one original name gets one unique
1155 nsIPs :: OrigIParamCache
1156 -- Ensures that one implicit parameter name gets one unique
1159 type OrigNameCache = ModuleEnv (OccEnv Name)
1160 type OrigIParamCache = FiniteMap (IPName OccName) (IPName Name)
1165 %************************************************************************
1167 The module graph and ModSummary type
1168 A ModSummary is a node in the compilation manager's
1169 dependency graph, and it's also passed to hscMain
1171 %************************************************************************
1173 A ModuleGraph contains all the nodes from the home package (only).
1174 There will be a node for each source module, plus a node for each hi-boot
1178 type ModuleGraph = [ModSummary] -- The module graph,
1179 -- NOT NECESSARILY IN TOPOLOGICAL ORDER
1181 emptyMG :: ModuleGraph
1184 -- The nodes of the module graph are
1185 -- EITHER a regular Haskell source module
1186 -- OR a hi-boot source module
1190 ms_mod :: Module, -- Identity of the module
1191 ms_hsc_src :: HscSource, -- Source is Haskell, hs-boot, external core
1192 ms_location :: ModLocation, -- Location
1193 ms_hs_date :: ClockTime, -- Timestamp of source file
1194 ms_obj_date :: Maybe ClockTime, -- Timestamp of object, maybe
1195 ms_srcimps :: [Located ModuleName], -- Source imports
1196 ms_imps :: [Located ModuleName], -- Non-source imports
1197 ms_hspp_file :: FilePath, -- Filename of preprocessed source.
1198 ms_hspp_opts :: DynFlags, -- Cached flags from OPTIONS, INCLUDE
1199 -- and LANGUAGE pragmas.
1200 ms_hspp_buf :: Maybe StringBuffer -- The actual preprocessed source, maybe.
1203 ms_mod_name :: ModSummary -> ModuleName
1204 ms_mod_name = moduleName . ms_mod
1206 -- The ModLocation contains both the original source filename and the
1207 -- filename of the cleaned-up source file after all preprocessing has been
1208 -- done. The point is that the summariser will have to cpp/unlit/whatever
1209 -- all files anyway, and there's no point in doing this twice -- just
1210 -- park the result in a temp file, put the name of it in the location,
1211 -- and let @compile@ read from that file on the way back up.
1213 -- The ModLocation is stable over successive up-sweeps in GHCi, wheres
1214 -- the ms_hs_date and imports can, of course, change
1216 msHsFilePath, msHiFilePath, msObjFilePath :: ModSummary -> FilePath
1217 msHsFilePath ms = expectJust "msHsFilePath" (ml_hs_file (ms_location ms))
1218 msHiFilePath ms = ml_hi_file (ms_location ms)
1219 msObjFilePath ms = ml_obj_file (ms_location ms)
1221 isBootSummary :: ModSummary -> Bool
1222 isBootSummary ms = isHsBoot (ms_hsc_src ms)
1224 instance Outputable ModSummary where
1226 = sep [text "ModSummary {",
1227 nest 3 (sep [text "ms_hs_date = " <> text (show (ms_hs_date ms)),
1228 text "ms_mod =" <+> ppr (ms_mod ms)
1229 <> text (hscSourceString (ms_hsc_src ms)) <> comma,
1230 text "ms_imps =" <+> ppr (ms_imps ms),
1231 text "ms_srcimps =" <+> ppr (ms_srcimps ms)]),
1235 showModMsg :: HscTarget -> Bool -> ModSummary -> String
1236 showModMsg target recomp mod_summary
1237 = showSDoc (hsep [text (mod_str ++ replicate (max 0 (16 - length mod_str)) ' '),
1238 char '(', text (msHsFilePath mod_summary) <> comma,
1240 HscInterpreted | recomp
1241 -> text "interpreted"
1242 HscNothing -> text "nothing"
1243 _other -> text (msObjFilePath mod_summary),
1246 mod = moduleName (ms_mod mod_summary)
1247 mod_str = showSDoc (ppr mod) ++ hscSourceString (ms_hsc_src mod_summary)
1251 %************************************************************************
1253 \subsection{Hpc Support}
1255 %************************************************************************
1258 data HpcInfo = HpcInfo
1259 { hpcInfoTickCount :: Int
1260 , hpcInfoHash :: Int
1264 noHpcInfo :: HpcInfo
1265 noHpcInfo = NoHpcInfo
1268 %************************************************************************
1270 \subsection{Vectorisation Support}
1272 %************************************************************************
1274 The following information is generated and consumed by the vectorisation
1275 subsystem. It communicates the vectorisation status of declarations from one
1278 Why do we need both f and f_v in the ModGuts/ModDetails/EPS version VectInfo
1279 below? We need to know `f' when converting to IfaceVectInfo. However, during
1280 vectorisation, we need to know `f_v', whose `Var' we cannot lookup based
1281 on just the OccName easily in a Core pass.
1284 -- ModGuts/ModDetails/EPS version
1287 vectInfoVar :: VarEnv (Var , Var ), -- (f, f_v) keyed on f
1288 vectInfoTyCon :: NameEnv (TyCon , TyCon), -- (T, T_v) keyed on T
1289 vectInfoDataCon :: NameEnv (DataCon, DataCon), -- (C, C_v) keyed on C
1290 vectInfoIso :: NameEnv (TyCon , Var) -- (T, isoT) keyed on T
1292 -- all of this is always tidy, even in ModGuts
1297 ifaceVectInfoVar :: [Name],
1298 -- all variables in here have a vectorised variant;
1299 -- the name of the vectorised variant is determined by `mkCloVect'
1300 ifaceVectInfoTyCon :: [Name],
1301 -- all tycons in here have a vectorised variant;
1302 -- the name of the vectorised variant and those of its
1303 -- data constructors are determined by `mkVectTyConOcc'
1304 -- and `mkVectDataConOcc'; the names of
1305 -- the isomorphisms is determined by `mkVectIsoOcc'
1306 ifaceVectInfoTyConReuse :: [Name]
1307 -- the vectorised form of all the tycons in here coincids with
1308 -- the unconverted from; the names of the isomorphisms is determined
1309 -- by `mkVectIsoOcc'
1312 noVectInfo :: VectInfo
1313 noVectInfo = VectInfo emptyVarEnv emptyNameEnv emptyNameEnv emptyNameEnv
1315 plusVectInfo :: VectInfo -> VectInfo -> VectInfo
1316 plusVectInfo vi1 vi2 =
1317 VectInfo (vectInfoVar vi1 `plusVarEnv` vectInfoVar vi2)
1318 (vectInfoTyCon vi1 `plusNameEnv` vectInfoTyCon vi2)
1319 (vectInfoDataCon vi1 `plusNameEnv` vectInfoDataCon vi2)
1320 (vectInfoIso vi1 `plusNameEnv` vectInfoIso vi2)
1322 noIfaceVectInfo :: IfaceVectInfo
1323 noIfaceVectInfo = IfaceVectInfo [] [] []
1326 %************************************************************************
1328 \subsection{Linkable stuff}
1330 %************************************************************************
1332 This stuff is in here, rather than (say) in Linker.lhs, because the Linker.lhs
1333 stuff is the *dynamic* linker, and isn't present in a stage-1 compiler
1336 data Linkable = LM {
1337 linkableTime :: ClockTime, -- Time at which this linkable was built
1338 -- (i.e. when the bytecodes were produced,
1339 -- or the mod date on the files)
1340 linkableModule :: Module, -- Should be Module, but see below
1341 linkableUnlinked :: [Unlinked]
1344 isObjectLinkable :: Linkable -> Bool
1345 isObjectLinkable l = not (null unlinked) && all isObject unlinked
1346 where unlinked = linkableUnlinked l
1347 -- A linkable with no Unlinked's is treated as a BCO. We can
1348 -- generate a linkable with no Unlinked's as a result of
1349 -- compiling a module in HscNothing mode, and this choice
1350 -- happens to work well with checkStability in module GHC.
1352 instance Outputable Linkable where
1353 ppr (LM when_made mod unlinkeds)
1354 = (text "LinkableM" <+> parens (text (show when_made)) <+> ppr mod)
1355 $$ nest 3 (ppr unlinkeds)
1357 -------------------------------------------
1362 | BCOs CompiledByteCode
1365 data CompiledByteCode = NoByteCode
1368 instance Outputable Unlinked where
1369 ppr (DotO path) = text "DotO" <+> text path
1370 ppr (DotA path) = text "DotA" <+> text path
1371 ppr (DotDLL path) = text "DotDLL" <+> text path
1373 ppr (BCOs bcos) = text "BCOs" <+> ppr bcos
1375 ppr (BCOs bcos) = text "No byte code"
1378 isObject (DotO _) = True
1379 isObject (DotA _) = True
1380 isObject (DotDLL _) = True
1383 isInterpretable = not . isObject
1385 nameOfObject (DotO fn) = fn
1386 nameOfObject (DotA fn) = fn
1387 nameOfObject (DotDLL fn) = fn
1388 nameOfObject other = pprPanic "nameOfObject" (ppr other)
1390 byteCodeOfObject (BCOs bc) = bc
1391 byteCodeOfObject other = pprPanic "byteCodeOfObject" (ppr other)
1394 %************************************************************************
1396 \subsection{Breakpoint Support}
1398 %************************************************************************
1401 type BreakIndex = Int
1403 -- | all the information about the breakpoints for a given module
1406 { modBreaks_flags :: BreakArray
1407 -- The array of flags, one per breakpoint,
1408 -- indicating which breakpoints are enabled.
1409 , modBreaks_locs :: !(Array BreakIndex SrcSpan)
1410 -- An array giving the source span of each breakpoint.
1411 , modBreaks_vars :: !(Array BreakIndex [OccName])
1412 -- An array giving the names of the free variables at each breakpoint.
1415 emptyModBreaks :: ModBreaks
1416 emptyModBreaks = ModBreaks
1417 { modBreaks_flags = error "ModBreaks.modBreaks_array not initialised"
1418 -- Todo: can we avoid this?
1419 , modBreaks_locs = array (0,-1) []
1420 , modBreaks_vars = array (0,-1) []