2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
4 \section[Id]{@Ids@: Value and constructor identifiers}
7 #include "HsVersions.h"
11 GenId(..), -- *naughtily* used in some places (e.g., TcHsSyn)
12 SYN_IE(Id), IdDetails,
14 SYN_IE(ConTag), fIRST_TAG,
15 SYN_IE(DataCon), SYN_IE(DictFun), SYN_IE(DictVar),
22 mkIdWithNewUniq, mkIdWithNewName,
37 -- DESTRUCTION (excluding pragmatic info)
52 recordSelectorFieldLabel,
58 cmpId_withSpecDataCon,
61 idWantsToBeINLINEd, getInlinePragma,
62 idMustBeINLINEd, idMustNotBeINLINEd,
65 isConstMethodId_maybe,
66 isDataCon, isAlgCon, isNewCon,
68 isDefaultMethodId_maybe,
75 isSuperDictSelId_maybe,
82 unfoldingUnfriendlyId,
88 -- PRINTING and RENUMBERING
99 -- UNFOLDING, ARITY, UPDATE, AND STRICTNESS STUFF (etc)
113 replaceIdInfo, replacePragmaInfo,
114 addInlinePragma, nukeNoInlinePragma, addNoInlinePragma,
117 SYN_IE(IdEnv), SYN_IE(GenIdSet), SYN_IE(IdSet),
138 modifyIdEnv_Directly,
149 IMPORT_DELOOPER(IdLoop) -- for paranoia checking
150 IMPORT_DELOOPER(TyLoop) -- for paranoia checking
154 import Class ( classOpString, SYN_IE(Class), GenClass, SYN_IE(ClassOp), GenClassOp )
156 import Maybes ( maybeToBool )
157 import Name ( nameUnique, mkLocalName, mkSysLocalName, isLocalName,
158 mkCompoundName, mkInstDeclName,
159 isLocallyDefinedName, occNameString, modAndOcc,
160 isLocallyDefined, changeUnique, isWiredInName,
161 nameString, getOccString, setNameVisibility,
162 isExported, ExportFlag(..), DefnInfo, Provenance,
163 OccName(..), Name, SYN_IE(Module),
166 import PrelMods ( pREL_TUP, pREL_BASE )
167 import Lex ( mkTupNameStr )
168 import FieldLabel ( fieldLabelName, FieldLabel(..){-instances-} )
169 import PragmaInfo ( PragmaInfo(..) )
170 #if __GLASGOW_HASKELL__ >= 202
171 import PrimOp ( PrimOp )
173 import PprEnv -- ( SYN_IE(NmbrM), NmbrEnv(..) )
174 import PprType ( getTypeString, specMaybeTysSuffix,
179 import MatchEnv ( MatchEnv )
180 import SrcLoc --( mkBuiltinSrcLoc )
181 import TysWiredIn ( tupleTyCon )
182 import TyCon --( TyCon, tyConDataCons )
183 import Type {- ( mkSigmaTy, mkTyVarTys, mkFunTys, mkDictTy,
184 applyTyCon, instantiateTy, mkForAllTys,
185 tyVarsOfType, applyTypeEnvToTy, typePrimRep,
186 GenType, SYN_IE(ThetaType), SYN_IE(TauType), SYN_IE(Type)
188 import TyVar --( alphaTyVars, isEmptyTyVarSet, SYN_IE(TyVarEnv) )
189 import Usage ( SYN_IE(UVar) )
191 import UniqSet -- practically all of it
192 import Unique ( getBuiltinUniques, pprUnique, showUnique,
194 Unique{-instance Ord3-}
196 import Outputable ( ifPprDebug, Outputable(..), PprStyle(..) )
197 import Util {- ( mapAccumL, nOfThem, zipEqual, assoc,
198 panic, panic#, pprPanic, assertPanic
202 Here are the @Id@ and @IdDetails@ datatypes; also see the notes that
205 Every @Id@ has a @Unique@, to uniquify it and for fast comparison, a
206 @Type@, and an @IdInfo@ (non-essential info about it, e.g.,
207 strictness). The essential info about different kinds of @Ids@ is
210 ToDo: possibly cache other stuff in the single-constructor @Id@ type.
214 Unique -- Key for fast comparison
216 ty -- Id's type; used all the time;
217 IdDetails -- Stuff about individual kinds of Ids.
218 PragmaInfo -- Properties of this Id requested by programmer
219 -- eg specialise-me, inline-me
220 IdInfo -- Properties of this Id deduced by compiler
224 data StrictnessMark = MarkedStrict | NotMarkedStrict
228 ---------------- Local values
230 = LocalId Bool -- Local name; mentioned by the user
231 -- True <=> no free type vars
233 | SysLocalId Bool -- Local name; made up by the compiler
236 | PrimitiveId PrimOp -- The Id for a primitive operation
238 | SpecPragmaId -- Local name; introduced by the compiler
239 (Maybe Id) -- for explicit specid in pragma
240 Bool -- as for LocalId
242 ---------------- Global values
244 | ImportedId -- Global name (Imported or Implicit); Id imported from an interface
246 ---------------- Data constructors
248 | AlgConId -- Used for both data and newtype constructors.
249 -- You can tell the difference by looking at the TyCon
251 [StrictnessMark] -- Strict args; length = arity
252 [FieldLabel] -- Field labels for this constructor;
253 --length = 0 (not a record) or arity
255 [TyVar] [(Class,Type)] -- Type vars and context for the data type decl
256 [TyVar] [(Class,Type)] -- Ditto for the context of the constructor,
257 -- the existentially quantified stuff
258 [Type] TyCon -- Args and result tycon
260 -- forall tyvars1 ++ tyvars2. theta1 ++ theta2 =>
261 -- unitype_1 -> ... -> unitype_n -> tycon tyvars
263 | TupleConId Int -- Its arity
265 | RecordSelId FieldLabel
267 ---------------- Things to do with overloading
269 | SuperDictSelId -- Selector for superclass dictionary
270 Class -- The class (input dict)
271 Class -- The superclass (result dict)
273 | MethodSelId Class -- An overloaded class operation, with
274 -- a fully polymorphic type. Its code
275 -- just selects a method from the
276 -- dictionary. The class.
277 ClassOp -- The operation
279 -- NB: The IdInfo for a MethodSelId has all the info about its
280 -- related "constant method Ids", which are just
281 -- specialisations of this general one.
283 | DefaultMethodId -- Default method for a particular class op
284 Class -- same class, <blah-blah> info as MethodSelId
285 ClassOp -- (surprise, surprise)
286 Bool -- True <=> I *know* this default method Id
287 -- is a generated one that just says
288 -- `error "No default method for <op>"'.
291 | DictFunId Class -- A DictFun is uniquely identified
292 Type -- by its class and type; this type has free type vars,
293 -- whose identity is irrelevant. Eg Class = Eq
295 -- The "a" is irrelevant. As it is too painful to
296 -- actually do comparisons that way, we kindly supply
297 -- a Unique for that purpose.
300 | ConstMethodId -- A method which depends only on the type of the
301 -- instance, and not on any further dictionaries etc.
302 Class -- Uniquely identified by:
303 Type -- (class, type, classop) triple
305 Module -- module where instance came from
307 | InstId -- An instance of a dictionary, class operation,
308 -- or overloaded value (Local name)
309 Bool -- as for LocalId
311 | SpecId -- A specialisation of another Id
312 Id -- Id of which this is a specialisation
313 [Maybe Type] -- Types at which it is specialised;
314 -- A "Nothing" says this type ain't relevant.
315 Bool -- True <=> no free type vars; it's not enough
316 -- to know about the unspec version, because
317 -- we may specialise to a type w/ free tyvars
318 -- (i.e., in one of the "Maybe Type" dudes).
320 -- Scheduled for deletion: SLPJ Nov 96
321 -- Nobody seems to depend on knowing this.
322 | WorkerId -- A "worker" for some other Id
323 Id -- Id for which this is a worker
331 DictFunIds are generated from instance decls.
336 instance Foo a => Foo [a] where
339 generates the dict fun id decl
341 dfun.Foo.[*] = \d -> ...
343 The dfun id is uniquely named by the (class, type) pair. Notice, it
344 isn't a (class,tycon) pair any more, because we may get manually or
345 automatically generated specialisations of the instance decl:
347 instance Foo [Int] where
354 The type variables in the name are irrelevant; we print them as stars.
357 Constant method ids are generated from instance decls where
358 there is no context; that is, no dictionaries are needed to
359 construct the method. Example
361 instance Foo Int where
364 Then we get a constant method
369 It is possible, albeit unusual, to have a constant method
370 for an instance decl which has type vars:
372 instance Foo [a] where
376 We get the constant method
380 So a constant method is identified by a class/op/type triple.
381 The type variables in the type are irrelevant.
384 For Ids whose names must be known/deducible in other modules, we have
385 to conjure up their worker's names (and their worker's worker's
386 names... etc) in a known systematic way.
389 %************************************************************************
391 \subsection[Id-documentation]{Documentation}
393 %************************************************************************
397 The @Id@ datatype describes {\em values}. The basic things we want to
398 know: (1)~a value's {\em type} (@idType@ is a very common
399 operation in the compiler); and (2)~what ``flavour'' of value it might
400 be---for example, it can be terribly useful to know that a value is a
404 %----------------------------------------------------------------------
405 \item[@AlgConId@:] For the data constructors declared by a @data@
406 declaration. Their type is kept in {\em two} forms---as a regular
407 @Type@ (in the usual place), and also in its constituent pieces (in
408 the ``details''). We are frequently interested in those pieces.
410 %----------------------------------------------------------------------
411 \item[@TupleConId@:] This is just a special shorthand for @DataCons@ for
412 the infinite family of tuples.
414 %----------------------------------------------------------------------
415 \item[@ImportedId@:] These are values defined outside this module.
416 {\em Everything} we want to know about them must be stored here (or in
419 %----------------------------------------------------------------------
420 \item[@MethodSelId@:] A selector from a dictionary; it may select either
421 a method or a dictionary for one of the class's superclasses.
423 %----------------------------------------------------------------------
426 @mkDictFunId [a,b..] theta C T@ is the function derived from the
429 instance theta => C (T a b ..) where
432 It builds function @Id@ which maps dictionaries for theta,
433 to a dictionary for C (T a b ..).
435 *Note* that with the ``Mark Jones optimisation'', the theta may
436 include dictionaries for the immediate superclasses of C at the type
439 %----------------------------------------------------------------------
442 %----------------------------------------------------------------------
445 %----------------------------------------------------------------------
448 %----------------------------------------------------------------------
449 \item[@LocalId@:] A purely-local value, e.g., a function argument,
450 something defined in a @where@ clauses, ... --- but which appears in
451 the original program text.
453 %----------------------------------------------------------------------
454 \item[@SysLocalId@:] Same as a @LocalId@, except does {\em not} appear in
455 the original program text; these are introduced by the compiler in
458 %----------------------------------------------------------------------
459 \item[@SpecPragmaId@:] Introduced by the compiler to record
460 Specialisation pragmas. It is dead code which MUST NOT be removed
461 before specialisation.
466 %----------------------------------------------------------------------
469 @DataCons@ @TupleCons@, @Importeds@, @SuperDictSelIds@,
470 @MethodSelIds@, @DictFunIds@, and @DefaultMethodIds@ have the following
474 They have no free type variables, so if you are making a
475 type-variable substitution you don't need to look inside them.
477 They are constants, so they are not free variables. (When the STG
478 machine makes a closure, it puts all the free variables in the
479 closure; the above are not required.)
481 Note that @InstIds@, @Locals@ and @SysLocals@ {\em may} have the above
482 properties, but they may not.
485 %************************************************************************
487 \subsection[Id-general-funs]{General @Id@-related functions}
489 %************************************************************************
492 -- isDataCon returns False for @newtype@ constructors
493 isDataCon (Id _ _ _ (AlgConId _ _ _ _ _ _ _ _ tc) _ _) = isDataTyCon tc
494 isDataCon (Id _ _ _ (TupleConId _) _ _) = True
495 isDataCon (Id _ _ _ (SpecId unspec _ _) _ _) = isDataCon unspec
496 isDataCon other = False
498 isNewCon (Id _ _ _ (AlgConId _ _ _ _ _ _ _ _ tc) _ _) = isNewTyCon tc
499 isNewCon other = False
501 -- isAlgCon returns True for @data@ or @newtype@ constructors
502 isAlgCon (Id _ _ _ (AlgConId _ _ _ _ _ _ _ _ _) _ _) = True
503 isAlgCon (Id _ _ _ (TupleConId _) _ _) = True
504 isAlgCon (Id _ _ _ (SpecId unspec _ _) _ _) = isAlgCon unspec
505 isAlgCon other = False
507 isTupleCon (Id _ _ _ (TupleConId _) _ _) = True
508 isTupleCon (Id _ _ _ (SpecId unspec _ _) _ _) = isTupleCon unspec
509 isTupleCon other = False
512 @toplevelishId@ tells whether an @Id@ {\em may} be defined in a nested
513 @let(rec)@ (returns @False@), or whether it is {\em sure} to be
514 defined at top level (returns @True@). This is used to decide whether
515 the @Id@ is a candidate free variable. NB: you are only {\em sure}
516 about something if it returns @True@!
519 toplevelishId :: Id -> Bool
520 idHasNoFreeTyVars :: Id -> Bool
522 toplevelishId (Id _ _ _ details _ _)
525 chk (AlgConId _ __ _ _ _ _ _ _) = True
526 chk (TupleConId _) = True
527 chk (RecordSelId _) = True
528 chk ImportedId = True
529 chk (SuperDictSelId _ _) = True
530 chk (MethodSelId _ _) = True
531 chk (DefaultMethodId _ _ _) = True
532 chk (DictFunId _ _) = True
533 chk (ConstMethodId _ _ _ _) = True
534 chk (SpecId unspec _ _) = toplevelishId unspec
535 -- depends what the unspecialised thing is
536 chk (WorkerId unwrkr) = toplevelishId unwrkr
537 chk (InstId _) = False -- these are local
538 chk (LocalId _) = False
539 chk (SysLocalId _) = False
540 chk (SpecPragmaId _ _) = False
541 chk (PrimitiveId _) = True
543 idHasNoFreeTyVars (Id _ _ _ details _ info)
546 chk (AlgConId _ _ _ _ _ _ _ _ _) = True
547 chk (TupleConId _) = True
548 chk (RecordSelId _) = True
549 chk ImportedId = True
550 chk (SuperDictSelId _ _) = True
551 chk (MethodSelId _ _) = True
552 chk (DefaultMethodId _ _ _) = True
553 chk (DictFunId _ _) = True
554 chk (ConstMethodId _ _ _ _) = True
555 chk (WorkerId unwrkr) = idHasNoFreeTyVars unwrkr
556 chk (SpecId _ _ no_free_tvs) = no_free_tvs
557 chk (InstId no_free_tvs) = no_free_tvs
558 chk (LocalId no_free_tvs) = no_free_tvs
559 chk (SysLocalId no_free_tvs) = no_free_tvs
560 chk (SpecPragmaId _ no_free_tvs) = no_free_tvs
561 chk (PrimitiveId _) = True
563 -- omitIfaceSigForId tells whether an Id's info is implied by other declarations,
564 -- so we don't need to put its signature in an interface file, even if it's mentioned
565 -- in some other interface unfolding.
571 omitIfaceSigForId (Id _ name _ details _ _)
577 ImportedId -> True -- Never put imports in interface file
578 (PrimitiveId _) -> True -- Ditto, for primitives
580 -- This group is Ids that are implied by their type or class decl;
581 -- remember that all type and class decls appear in the interface file.
582 -- The dfun id must *not* be omitted, because it carries version info for
584 (AlgConId _ _ _ _ _ _ _ _ _) -> True
585 (TupleConId _) -> True
586 (RecordSelId _) -> True
587 (SuperDictSelId _ _) -> True
588 (MethodSelId _ _) -> True
590 other -> False -- Don't omit!
591 -- NB DefaultMethodIds are not omitted
595 isImportedId (Id _ _ _ ImportedId _ _) = True
596 isImportedId other = False
598 isBottomingId (Id _ _ _ _ _ info) = bottomIsGuaranteed (strictnessInfo info)
600 isSysLocalId (Id _ _ _ (SysLocalId _) _ _) = True
601 isSysLocalId other = False
603 isSpecPragmaId (Id _ _ _ (SpecPragmaId _ _) _ _) = True
604 isSpecPragmaId other = False
606 isMethodSelId_maybe (Id _ _ _ (MethodSelId cls op) _ _) = Just (cls,op)
607 isMethodSelId_maybe _ = Nothing
609 isDefaultMethodId (Id _ _ _ (DefaultMethodId _ _ _) _ _) = True
610 isDefaultMethodId other = False
612 isDefaultMethodId_maybe (Id _ _ _ (DefaultMethodId cls clsop err) _ _)
613 = Just (cls, clsop, err)
614 isDefaultMethodId_maybe other = Nothing
616 isDictFunId (Id _ _ _ (DictFunId _ _) _ _) = True
617 isDictFunId other = False
619 isConstMethodId (Id _ _ _ (ConstMethodId _ _ _ _) _ _) = True
620 isConstMethodId other = False
622 isConstMethodId_maybe (Id _ _ _ (ConstMethodId cls ty clsop _) _ _)
623 = Just (cls, ty, clsop)
624 isConstMethodId_maybe other = Nothing
626 isSuperDictSelId_maybe (Id _ _ _ (SuperDictSelId c sc) _ _) = Just (c, sc)
627 isSuperDictSelId_maybe other_id = Nothing
629 isWorkerId (Id _ _ _ (WorkerId _) _ _) = True
630 isWorkerId other = False
632 isWrapperId id = workerExists (getIdStrictness id)
634 isPrimitiveId_maybe (Id _ _ _ (PrimitiveId primop) _ _) = Just primop
635 isPrimitiveId_maybe other = Nothing
638 Tell them who my wrapper function is.
641 myWrapperMaybe :: Id -> Maybe Id
643 myWrapperMaybe (Id _ _ _ (WorkerId my_wrapper) _ _) = Just my_wrapper
644 myWrapperMaybe other_id = Nothing
649 unfoldingUnfriendlyId -- return True iff it is definitely a bad
650 :: Id -- idea to export an unfolding that
651 -> Bool -- mentions this Id. Reason: it cannot
652 -- possibly be seen in another module.
654 unfoldingUnfriendlyId id = not (externallyVisibleId id)
657 @externallyVisibleId@: is it true that another module might be
658 able to ``see'' this Id in a code generation sense. That
659 is, another .o file might refer to this Id.
661 In tidyCorePgm (SimplCore.lhs) we carefully set each top level thing's
662 local-ness precisely so that the test here would be easy
665 externallyVisibleId :: Id -> Bool
666 externallyVisibleId id@(Id _ name _ _ _ _) = not (isLocalName name)
667 -- not local => global => externally visible
670 CLAIM (not ASSERTed) for @applyTypeEnvToId@ and @applySubstToId@:
671 `Top-levelish Ids'' cannot have any free type variables, so applying
672 the type-env cannot have any effect. (NB: checked in CoreLint?)
674 The special casing is in @applyTypeEnvToId@, not @apply_to_Id@, as the
675 former ``should be'' the usual crunch point.
678 type TypeEnv = TyVarEnv Type
680 applyTypeEnvToId :: TypeEnv -> Id -> Id
682 applyTypeEnvToId type_env id@(Id _ _ ty _ _ _)
683 | idHasNoFreeTyVars id
686 = apply_to_Id ( \ ty ->
687 applyTypeEnvToTy type_env ty
692 apply_to_Id :: (Type -> Type) -> Id -> Id
694 apply_to_Id ty_fn (Id u n ty details prag info)
698 Id u n new_ty (apply_to_details details) prag (apply_to_IdInfo ty_fn info)
700 apply_to_details (SpecId unspec ty_maybes no_ftvs)
702 new_unspec = apply_to_Id ty_fn unspec
703 new_maybes = map apply_to_maybe ty_maybes
705 SpecId new_unspec new_maybes (no_free_tvs ty)
706 -- ToDo: gratuitous recalc no_ftvs???? (also InstId)
708 apply_to_maybe Nothing = Nothing
709 apply_to_maybe (Just ty) = Just (ty_fn ty)
711 apply_to_details (WorkerId unwrkr)
713 new_unwrkr = apply_to_Id ty_fn unwrkr
717 apply_to_details other = other
720 Sadly, I don't think the one using the magic typechecker substitution
721 can be done with @apply_to_Id@. Here we go....
723 Strictness is very important here. We can't leave behind thunks
724 with pointers to the substitution: it {\em must} be single-threaded.
728 applySubstToId :: Subst -> Id -> (Subst, Id)
730 applySubstToId subst id@(Id u n ty info details)
731 -- *cannot* have a "idHasNoFreeTyVars" get-out clause
732 -- because, in the typechecker, we are still
733 -- *concocting* the types.
734 = case (applySubstToTy subst ty) of { (s2, new_ty) ->
735 case (applySubstToIdInfo s2 info) of { (s3, new_info) ->
736 case (apply_to_details s3 new_ty details) of { (s4, new_details) ->
737 (s4, Id u n new_ty new_info new_details) }}}
739 apply_to_details subst _ (InstId inst no_ftvs)
740 = case (applySubstToInst subst inst) of { (s2, new_inst) ->
741 (s2, InstId new_inst no_ftvs{-ToDo:right???-}) }
743 apply_to_details subst new_ty (SpecId unspec ty_maybes _)
744 = case (applySubstToId subst unspec) of { (s2, new_unspec) ->
745 case (mapAccumL apply_to_maybe s2 ty_maybes) of { (s3, new_maybes) ->
746 (s3, SpecId new_unspec new_maybes (no_free_tvs new_ty)) }}
747 -- NB: recalc no_ftvs (I think it's necessary (?) WDP 95/04)
749 apply_to_maybe subst Nothing = (subst, Nothing)
750 apply_to_maybe subst (Just ty)
751 = case (applySubstToTy subst ty) of { (s2, new_ty) ->
754 apply_to_details subst _ (WorkerId unwrkr)
755 = case (applySubstToId subst unwrkr) of { (s2, new_unwrkr) ->
756 (s2, WorkerId new_unwrkr) }
758 apply_to_details subst _ other = (subst, other)
762 %************************************************************************
764 \subsection[Id-type-funs]{Type-related @Id@ functions}
766 %************************************************************************
769 idType :: GenId ty -> ty
771 idType (Id _ _ ty _ _ _) = ty
776 getMentionedTyConsAndClassesFromId :: Id -> (Bag TyCon, Bag Class)
778 getMentionedTyConsAndClassesFromId id
779 = getMentionedTyConsAndClassesFromType (idType id)
784 idPrimRep i = typePrimRep (idType i)
787 %************************************************************************
789 \subsection[Id-overloading]{Functions related to overloading}
791 %************************************************************************
794 mkSuperDictSelId u clas sc ty
795 = addStandardIdInfo $
796 Id u name ty details NoPragmaInfo noIdInfo
798 name = mkCompoundName name_fn u (getName clas)
799 details = SuperDictSelId clas sc
800 name_fn clas_str = SLIT("scsel_") _APPEND_ clas_str _APPEND_ mod _APPEND_ occNameString occ
801 (mod,occ) = modAndOcc sc
803 -- For method selectors the clean thing to do is
804 -- to give the method selector the same name as the class op itself.
805 mkMethodSelId op_name rec_c op ty
806 = addStandardIdInfo $
807 Id (uniqueOf op_name) op_name ty (MethodSelId rec_c op) NoPragmaInfo noIdInfo
809 mkDefaultMethodId dm_name rec_c op gen ty
810 = Id (uniqueOf dm_name) dm_name ty (DefaultMethodId rec_c op gen) NoPragmaInfo noIdInfo
812 mkDictFunId dfun_name full_ty clas ity
813 = Id (nameUnique dfun_name) dfun_name full_ty details NoPragmaInfo noIdInfo
815 details = DictFunId clas ity
817 mkConstMethodId uniq clas op ity full_ty from_here locn mod info
818 = Id uniq name full_ty details NoPragmaInfo info
820 name = mkInstDeclName uniq mod (VarOcc occ_name) locn from_here
821 details = ConstMethodId clas ity op mod
822 occ_name = classOpString op _APPEND_
823 SLIT("_cm_") _APPEND_ renum_type_string full_ty ity
825 mkWorkerId u unwrkr ty info
826 = Id u name ty details NoPragmaInfo info
828 name = mkCompoundName name_fn u (getName unwrkr)
829 details = WorkerId unwrkr
830 name_fn wkr_str = SLIT("$w") _APPEND_ wkr_str
833 = Id u name ty (InstId (no_free_tvs ty)) NoPragmaInfo noIdInfo
836 getConstMethodId clas op ty
837 = -- constant-method info is hidden in the IdInfo of
838 -- the class-op id (as mentioned up above).
840 sel_id = getMethodSelId clas op
842 case (lookupConstMethodId (getIdSpecialisation sel_id) ty) of
844 Nothing -> pprError "ERROR: getConstMethodId:" (vcat [
845 hsep [ppr PprDebug ty, ppr PprDebug ops, ppr PprDebug op_ids,
846 ppr PprDebug sel_id],
847 text "(This can arise if an interface pragma refers to an instance",
848 text "but there is no imported interface which *defines* that instance.",
849 text "The info above, however ugly, should indicate what else you need to import."
854 renum_type_string full_ty ity
856 nmbrType full_ty `thenNmbr` \ _ -> -- so all the tyvars get added to renumbering...
857 nmbrType ity `thenNmbr` \ rn_ity ->
858 returnNmbr (getTypeString rn_ity)
862 %************************************************************************
864 \subsection[local-funs]{@LocalId@-related functions}
866 %************************************************************************
869 mkImported n ty info = Id (nameUnique n) n ty ImportedId NoPragmaInfo info
871 mkPrimitiveId n ty primop
872 = addStandardIdInfo $
873 Id (nameUnique n) n ty (PrimitiveId primop) IMustBeINLINEd noIdInfo
874 -- The pragma @IMustBeINLINEd@ says that this Id absolutely must be inlined.
875 -- It's only true for primitives, because we don't want to make a closure for each of them.
880 type MyTy a b = GenType (GenTyVar a) b
881 type MyId a b = GenId (MyTy a b)
883 no_free_tvs ty = isEmptyTyVarSet (tyVarsOfType ty)
885 -- SysLocal: for an Id being created by the compiler out of thin air...
886 -- UserLocal: an Id with a name the user might recognize...
887 mkSysLocal :: FAST_STRING -> Unique -> MyTy a b -> SrcLoc -> MyId a b
888 mkUserLocal :: OccName -> Unique -> MyTy a b -> SrcLoc -> MyId a b
890 mkSysLocal str uniq ty loc
891 = Id uniq (mkSysLocalName uniq str loc) ty (SysLocalId (no_free_tvs ty)) NoPragmaInfo noIdInfo
893 mkUserLocal occ uniq ty loc
894 = Id uniq (mkLocalName uniq occ loc) ty (LocalId (no_free_tvs ty)) NoPragmaInfo noIdInfo
896 mkUserId :: Name -> MyTy a b -> PragmaInfo -> MyId a b
897 mkUserId name ty pragma_info
898 = Id (nameUnique name) name ty (LocalId (no_free_tvs ty)) pragma_info noIdInfo
905 -- for a SpecPragmaId being created by the compiler out of thin air...
906 mkSpecPragmaId :: OccName -> Unique -> Type -> Maybe Id -> SrcLoc -> Id
907 mkSpecPragmaId str uniq ty specid loc
908 = Id uniq (mkShortName str loc) ty noIdInfo (SpecPragmaId specid (no_free_tvs ty))
911 mkSpecId u unspec ty_maybes ty info
912 = ASSERT(not (maybeToBool (isSpecId_maybe unspec)))
913 Id u n ty info (SpecId unspec ty_maybes (no_free_tvs ty))
915 -- Specialised version of constructor: only used in STG and code generation
916 -- Note: The specialsied Id has the same unique as the unspeced Id
918 mkSameSpecCon ty_maybes unspec@(Id u n ty info details)
919 = ASSERT(isDataCon unspec)
920 ASSERT(not (maybeToBool (isSpecId_maybe unspec)))
921 Id u n new_ty info (SpecId unspec ty_maybes (no_free_tvs new_ty))
923 new_ty = specialiseTy ty ty_maybes 0
925 localiseId :: Id -> Id
926 localiseId id@(Id u n ty info details)
927 = Id u (mkShortName name loc) ty info (LocalId (no_free_tvs ty))
933 -- See notes with setNameVisibility (Name.lhs)
934 setIdVisibility :: Module -> Id -> Id
935 setIdVisibility mod (Id uniq name ty details prag info)
936 = Id uniq (setNameVisibility mod name) ty details prag info
938 mkIdWithNewUniq :: Id -> Unique -> Id
939 mkIdWithNewUniq (Id _ n ty details prag info) u
940 = Id u (changeUnique n u) ty details prag info
942 mkIdWithNewName :: Id -> Name -> Id
943 mkIdWithNewName (Id _ _ ty details prag info) new_name
944 = Id (uniqueOf new_name) new_name ty details prag info
947 Make some local @Ids@ for a template @CoreExpr@. These have bogus
948 @Uniques@, but that's OK because the templates are supposed to be
949 instantiated before use.
951 mkTemplateLocals :: [Type] -> [Id]
953 = zipWith (\ u -> \ ty -> mkSysLocal SLIT("tpl") u ty mkBuiltinSrcLoc)
954 (getBuiltinUniques (length tys))
959 getIdInfo :: GenId ty -> IdInfo
960 getPragmaInfo :: GenId ty -> PragmaInfo
962 getIdInfo (Id _ _ _ _ _ info) = info
963 getPragmaInfo (Id _ _ _ _ info _) = info
965 replaceIdInfo :: Id -> IdInfo -> Id
966 replaceIdInfo (Id u n ty details pinfo _) info = Id u n ty details pinfo info
968 replacePragmaInfo :: Id -> PragmaInfo -> Id
969 replacePragmaInfo (Id u sn ty details _ info) prag = Id u sn ty details prag info
972 %************************************************************************
974 \subsection[Id-arities]{Arity-related functions}
976 %************************************************************************
978 For locally-defined Ids, the code generator maintains its own notion
979 of their arities; so it should not be asking... (but other things
980 besides the code-generator need arity info!)
983 getIdArity :: Id -> ArityInfo
984 getIdArity id@(Id _ _ _ _ _ id_info)
987 addIdArity :: Id -> ArityInfo -> Id
988 addIdArity (Id u n ty details pinfo info) arity
989 = Id u n ty details pinfo (info `addArityInfo` arity)
992 %************************************************************************
994 \subsection[Id-arities]{Deforestation related functions}
996 %************************************************************************
999 addIdDeforestInfo :: Id -> DeforestInfo -> Id
1000 addIdDeforestInfo (Id u n ty details pinfo info) def_info
1001 = Id u n ty details pinfo (info `addDeforestInfo` def_info)
1004 %************************************************************************
1006 \subsection[constructor-funs]{@DataCon@-related functions (incl.~tuples)}
1008 %************************************************************************
1012 -> [StrictnessMark] -> [FieldLabel]
1013 -> [TyVar] -> ThetaType
1014 -> [TyVar] -> ThetaType
1015 -> [TauType] -> TyCon
1017 -- can get the tag and all the pieces of the type from the Type
1019 mkDataCon n stricts fields tvs ctxt con_tvs con_ctxt args_tys tycon
1020 = ASSERT(length stricts == length args_tys)
1021 addStandardIdInfo data_con
1023 -- NB: data_con self-recursion; should be OK as tags are not
1024 -- looked at until late in the game.
1029 (AlgConId data_con_tag stricts fields tvs ctxt con_tvs con_ctxt args_tys tycon)
1030 IWantToBeINLINEd -- Always inline constructors if possible
1033 data_con_tag = assoc "mkDataCon" (data_con_family `zip` [fIRST_TAG..]) data_con
1034 data_con_family = tyConDataCons tycon
1037 = mkSigmaTy (tvs++con_tvs) (ctxt++con_ctxt)
1038 (mkFunTys args_tys (applyTyCon tycon (mkTyVarTys tvs)))
1041 mkTupleCon :: Arity -> Name -> Type -> Id
1042 mkTupleCon arity name ty
1043 = addStandardIdInfo tuple_id
1045 tuple_id = Id (nameUnique name) name ty
1047 IWantToBeINLINEd -- Always inline constructors if possible
1051 fIRST_TAG = 1 -- Tags allocated from here for real constructors
1054 dataConNumFields gives the number of actual fields in the
1055 {\em representation} of the data constructor. This may be more than appear
1056 in the source code; the extra ones are the existentially quantified
1061 = ASSERT(isDataCon id)
1062 case (dataConSig id) of { (_, _, _, con_theta, arg_tys, _) ->
1063 length con_theta + length arg_tys }
1065 isNullaryDataCon con = dataConNumFields con == 0 -- function of convenience
1070 dataConTag :: DataCon -> ConTag -- will panic if not a DataCon
1071 dataConTag (Id _ _ _ (AlgConId tag _ _ _ _ _ _ _ _) _ _) = tag
1072 dataConTag (Id _ _ _ (TupleConId _) _ _) = fIRST_TAG
1073 dataConTag (Id _ _ _ (SpecId unspec _ _) _ _) = dataConTag unspec
1075 dataConTyCon :: DataCon -> TyCon -- will panic if not a DataCon
1076 dataConTyCon (Id _ _ _ (AlgConId _ _ _ _ _ _ _ _ tycon) _ _) = tycon
1077 dataConTyCon (Id _ _ _ (TupleConId a) _ _) = tupleTyCon a
1079 dataConSig :: DataCon -> ([TyVar], ThetaType, [TyVar], ThetaType, [TauType], TyCon)
1080 -- will panic if not a DataCon
1082 dataConSig (Id _ _ _ (AlgConId _ _ _ tyvars theta con_tyvars con_theta arg_tys tycon) _ _)
1083 = (tyvars, theta, con_tyvars, con_theta, arg_tys, tycon)
1085 dataConSig (Id _ _ _ (TupleConId arity) _ _)
1086 = (tyvars, [], [], [], tyvar_tys, tupleTyCon arity)
1088 tyvars = take arity alphaTyVars
1089 tyvar_tys = mkTyVarTys tyvars
1092 -- dataConRepType returns the type of the representation of a contructor
1093 -- This may differ from the type of the contructor Id itself for two reasons:
1094 -- a) the constructor Id may be overloaded, but the dictionary isn't stored
1095 -- b) the constructor may store an unboxed version of a strict field.
1096 -- Here's an example illustrating both:
1097 -- data Ord a => T a = MkT Int! a
1099 -- T :: Ord a => Int -> a -> T a
1100 -- but the rep type is
1101 -- Trep :: Int# -> a -> T a
1102 -- Actually, the unboxed part isn't implemented yet!
1104 dataConRepType :: GenId (GenType tv u) -> GenType tv u
1106 = mkForAllTys tyvars tau
1108 (tyvars, theta, tau) = splitSigmaTy (idType con)
1110 dataConFieldLabels :: DataCon -> [FieldLabel]
1111 dataConFieldLabels (Id _ _ _ (AlgConId _ _ fields _ _ _ _ _ _) _ _) = fields
1112 dataConFieldLabels (Id _ _ _ (TupleConId _) _ _) = []
1114 dataConStrictMarks :: DataCon -> [StrictnessMark]
1115 dataConStrictMarks (Id _ _ _ (AlgConId _ stricts _ _ _ _ _ _ _) _ _) = stricts
1116 dataConStrictMarks (Id _ _ _ (TupleConId arity) _ _)
1117 = nOfThem arity NotMarkedStrict
1119 dataConRawArgTys :: DataCon -> [TauType] -- a function of convenience
1120 dataConRawArgTys con = case (dataConSig con) of { (_,_, _, _, arg_tys,_) -> arg_tys }
1122 dataConArgTys :: DataCon
1123 -> [Type] -- Instantiated at these types
1124 -> [Type] -- Needs arguments of these types
1125 dataConArgTys con_id inst_tys
1126 = map (instantiateTy tenv) arg_tys
1128 (tyvars, _, _, _, arg_tys, _) = dataConSig con_id
1129 tenv = zipEqual "dataConArgTys" tyvars inst_tys
1133 mkRecordSelId field_label selector_ty
1134 = addStandardIdInfo $ -- Record selectors have a standard unfolding
1135 Id (nameUnique name)
1138 (RecordSelId field_label)
1142 name = fieldLabelName field_label
1144 recordSelectorFieldLabel :: Id -> FieldLabel
1145 recordSelectorFieldLabel (Id _ _ _ (RecordSelId lbl) _ _) = lbl
1147 isRecordSelector (Id _ _ _ (RecordSelId lbl) _ _) = True
1148 isRecordSelector other = False
1152 Data type declarations are of the form:
1154 data Foo a b = C1 ... | C2 ... | ... | Cn ...
1156 For each constructor @Ci@, we want to generate a curried function; so, e.g., for
1157 @C1 x y z@, we want a function binding:
1159 fun_C1 = /\ a -> /\ b -> \ [x, y, z] -> Con C1 [a, b] [x, y, z]
1161 Notice the ``big lambdas'' and type arguments to @Con@---we are producing
1162 2nd-order polymorphic lambda calculus with explicit types.
1164 %************************************************************************
1166 \subsection[unfolding-Ids]{Functions related to @Ids@' unfoldings}
1168 %************************************************************************
1171 getIdUnfolding :: Id -> Unfolding
1173 getIdUnfolding (Id _ _ _ _ _ info) = unfoldInfo info
1175 addIdUnfolding :: Id -> Unfolding -> Id
1176 addIdUnfolding id@(Id u n ty details prag info) unfolding
1177 = Id u n ty details prag (info `addUnfoldInfo` unfolding)
1180 The inline pragma tells us to be very keen to inline this Id, but it's still
1181 OK not to if optimisation is switched off.
1184 getInlinePragma :: Id -> PragmaInfo
1185 getInlinePragma (Id _ _ _ _ prag _) = prag
1187 idWantsToBeINLINEd :: Id -> Bool
1189 idWantsToBeINLINEd (Id _ _ _ _ IWantToBeINLINEd _) = True
1190 idWantsToBeINLINEd (Id _ _ _ _ IMustBeINLINEd _) = True
1191 idWantsToBeINLINEd _ = False
1193 idMustNotBeINLINEd (Id _ _ _ _ IMustNotBeINLINEd _) = True
1194 idMustNotBeINLINEd _ = False
1196 idMustBeINLINEd (Id _ _ _ _ IMustBeINLINEd _) = True
1197 idMustBeINLINEd _ = False
1199 addInlinePragma :: Id -> Id
1200 addInlinePragma (Id u sn ty details _ info)
1201 = Id u sn ty details IWantToBeINLINEd info
1203 nukeNoInlinePragma :: Id -> Id
1204 nukeNoInlinePragma id@(Id u sn ty details IMustNotBeINLINEd info)
1205 = Id u sn ty details NoPragmaInfo info
1206 nukeNoInlinePragma id@(Id u sn ty details _ info) = id -- Otherwise no-op
1208 addNoInlinePragma :: Id -> Id
1209 addNoInlinePragma id@(Id u sn ty details _ info)
1210 = Id u sn ty details IMustNotBeINLINEd info
1215 %************************************************************************
1217 \subsection[IdInfo-funs]{Functions related to @Ids@' @IdInfos@}
1219 %************************************************************************
1222 getIdDemandInfo :: Id -> DemandInfo
1223 getIdDemandInfo (Id _ _ _ _ _ info) = demandInfo info
1225 addIdDemandInfo :: Id -> DemandInfo -> Id
1226 addIdDemandInfo (Id u n ty details prags info) demand_info
1227 = Id u n ty details prags (info `addDemandInfo` demand_info)
1231 getIdUpdateInfo :: Id -> UpdateInfo
1232 getIdUpdateInfo (Id _ _ _ _ _ info) = updateInfo info
1234 addIdUpdateInfo :: Id -> UpdateInfo -> Id
1235 addIdUpdateInfo (Id u n ty details prags info) upd_info
1236 = Id u n ty details prags (info `addUpdateInfo` upd_info)
1241 getIdArgUsageInfo :: Id -> ArgUsageInfo
1242 getIdArgUsageInfo (Id u n ty info details) = argUsageInfo info
1244 addIdArgUsageInfo :: Id -> ArgUsageInfo -> Id
1245 addIdArgUsageInfo (Id u n ty info details) au_info
1246 = Id u n ty (info `addArgusageInfo` au_info) details
1252 getIdFBTypeInfo :: Id -> FBTypeInfo
1253 getIdFBTypeInfo (Id u n ty info details) = fbTypeInfo info
1255 addIdFBTypeInfo :: Id -> FBTypeInfo -> Id
1256 addIdFBTypeInfo (Id u n ty info details) upd_info
1257 = Id u n ty (info `addFBTypeInfo` upd_info) details
1262 getIdSpecialisation :: Id -> SpecEnv
1263 getIdSpecialisation (Id _ _ _ _ _ info) = specInfo info
1265 addIdSpecialisation :: Id -> SpecEnv -> Id
1266 addIdSpecialisation (Id u n ty details prags info) spec_info
1267 = Id u n ty details prags (info `addSpecInfo` spec_info)
1270 Strictness: we snaffle the info out of the IdInfo.
1273 getIdStrictness :: Id -> StrictnessInfo Id
1275 getIdStrictness (Id _ _ _ _ _ info) = strictnessInfo info
1277 addIdStrictness :: Id -> StrictnessInfo Id -> Id
1278 addIdStrictness (Id u n ty details prags info) strict_info
1279 = Id u n ty details prags (info `addStrictnessInfo` strict_info)
1282 %************************************************************************
1284 \subsection[Id-comparison]{Comparison functions for @Id@s}
1286 %************************************************************************
1288 Comparison: equality and ordering---this stuff gets {\em hammered}.
1291 cmpId (Id u1 _ _ _ _ _) (Id u2 _ _ _ _ _) = cmp u1 u2
1292 -- short and very sweet
1296 instance Ord3 (GenId ty) where
1299 instance Eq (GenId ty) where
1300 a == b = case (a `cmp` b) of { EQ_ -> True; _ -> False }
1301 a /= b = case (a `cmp` b) of { EQ_ -> False; _ -> True }
1303 instance Ord (GenId ty) where
1304 a <= b = case (a `cmp` b) of { LT_ -> True; EQ_ -> True; GT__ -> False }
1305 a < b = case (a `cmp` b) of { LT_ -> True; EQ_ -> False; GT__ -> False }
1306 a >= b = case (a `cmp` b) of { LT_ -> False; EQ_ -> True; GT__ -> True }
1307 a > b = case (a `cmp` b) of { LT_ -> False; EQ_ -> False; GT__ -> True }
1308 _tagCmp a b = case (a `cmp` b) of { LT_ -> _LT; EQ_ -> _EQ; GT__ -> _GT }
1311 @cmpId_withSpecDataCon@ ensures that any spectys are taken into
1312 account when comparing two data constructors. We need to do this
1313 because a specialised data constructor has the same Unique as its
1314 unspecialised counterpart.
1317 cmpId_withSpecDataCon :: Id -> Id -> TAG_
1319 cmpId_withSpecDataCon id1 id2
1320 | eq_ids && isDataCon id1 && isDataCon id2
1321 = cmpEqDataCon id1 id2
1326 cmp_ids = cmpId id1 id2
1327 eq_ids = case cmp_ids of { EQ_ -> True; other -> False }
1329 cmpEqDataCon (Id _ _ _ (SpecId _ mtys1 _) _ _) (Id _ _ _ (SpecId _ mtys2 _) _ _)
1330 = panic# "Id.cmpEqDataCon:cmpUniTypeMaybeList mtys1 mtys2"
1332 cmpEqDataCon _ (Id _ _ _ (SpecId _ _ _) _ _) = LT_
1333 cmpEqDataCon (Id _ _ _ (SpecId _ _ _) _ _) _ = GT_
1334 cmpEqDataCon _ _ = EQ_
1337 %************************************************************************
1339 \subsection[Id-other-instances]{Other instance declarations for @Id@s}
1341 %************************************************************************
1344 instance Outputable ty => Outputable (GenId ty) where
1345 ppr sty id = pprId sty id
1347 -- and a SPECIALIZEd one:
1348 instance Outputable {-Id, i.e.:-}(GenId Type) where
1349 ppr sty id = pprId sty id
1351 showId :: PprStyle -> Id -> String
1352 showId sty id = show (pprId sty id)
1355 Default printing code (not used for interfaces):
1357 pprId :: Outputable ty => PprStyle -> GenId ty -> Doc
1359 pprId sty (Id u n _ _ prags _)
1360 = hcat [ppr sty n, pp_prags]
1362 pp_prags = ifPprDebug sty (case prags of
1363 IMustNotBeINLINEd -> text "{n}"
1364 IWantToBeINLINEd -> text "{i}"
1365 IMustBeINLINEd -> text "{I}"
1368 -- WDP 96/05/06: We can re-elaborate this as we go along...
1372 idUnique (Id u _ _ _ _ _) = u
1374 instance Uniquable (GenId ty) where
1377 instance NamedThing (GenId ty) where
1378 getName this_id@(Id u n _ details _ _) = n
1381 Note: The code generator doesn't carry a @UniqueSupply@, so it uses
1382 the @Uniques@ out of local @Ids@ given to it.
1384 %************************************************************************
1386 \subsection{@IdEnv@s and @IdSet@s}
1388 %************************************************************************
1391 type IdEnv elt = UniqFM elt
1393 nullIdEnv :: IdEnv a
1395 mkIdEnv :: [(GenId ty, a)] -> IdEnv a
1396 unitIdEnv :: GenId ty -> a -> IdEnv a
1397 addOneToIdEnv :: IdEnv a -> GenId ty -> a -> IdEnv a
1398 growIdEnv :: IdEnv a -> IdEnv a -> IdEnv a
1399 growIdEnvList :: IdEnv a -> [(GenId ty, a)] -> IdEnv a
1401 delManyFromIdEnv :: IdEnv a -> [GenId ty] -> IdEnv a
1402 delOneFromIdEnv :: IdEnv a -> GenId ty -> IdEnv a
1403 combineIdEnvs :: (a -> a -> a) -> IdEnv a -> IdEnv a -> IdEnv a
1404 mapIdEnv :: (a -> b) -> IdEnv a -> IdEnv b
1405 modifyIdEnv :: (a -> a) -> IdEnv a -> GenId ty -> IdEnv a
1406 rngIdEnv :: IdEnv a -> [a]
1408 isNullIdEnv :: IdEnv a -> Bool
1409 lookupIdEnv :: IdEnv a -> GenId ty -> Maybe a
1410 lookupNoFailIdEnv :: IdEnv a -> GenId ty -> a
1414 addOneToIdEnv = addToUFM
1415 combineIdEnvs = plusUFM_C
1416 delManyFromIdEnv = delListFromUFM
1417 delOneFromIdEnv = delFromUFM
1419 lookupIdEnv = lookupUFM
1422 nullIdEnv = emptyUFM
1426 growIdEnvList env pairs = plusUFM env (listToUFM pairs)
1427 isNullIdEnv env = sizeUFM env == 0
1428 lookupNoFailIdEnv env id = case (lookupIdEnv env id) of { Just xx -> xx }
1430 -- modifyIdEnv: Look up a thing in the IdEnv, then mash it with the
1431 -- modify function, and put it back.
1433 modifyIdEnv mangle_fn env key
1434 = case (lookupIdEnv env key) of
1436 Just xx -> addOneToIdEnv env key (mangle_fn xx)
1438 modifyIdEnv_Directly mangle_fn env key
1439 = case (lookupUFM_Directly env key) of
1441 Just xx -> addToUFM_Directly env key (mangle_fn xx)
1445 type GenIdSet ty = UniqSet (GenId ty)
1446 type IdSet = UniqSet (GenId Type)
1448 emptyIdSet :: GenIdSet ty
1449 intersectIdSets :: GenIdSet ty -> GenIdSet ty -> GenIdSet ty
1450 unionIdSets :: GenIdSet ty -> GenIdSet ty -> GenIdSet ty
1451 unionManyIdSets :: [GenIdSet ty] -> GenIdSet ty
1452 idSetToList :: GenIdSet ty -> [GenId ty]
1453 unitIdSet :: GenId ty -> GenIdSet ty
1454 addOneToIdSet :: GenIdSet ty -> GenId ty -> GenIdSet ty
1455 elementOfIdSet :: GenId ty -> GenIdSet ty -> Bool
1456 minusIdSet :: GenIdSet ty -> GenIdSet ty -> GenIdSet ty
1457 isEmptyIdSet :: GenIdSet ty -> Bool
1458 mkIdSet :: [GenId ty] -> GenIdSet ty
1460 emptyIdSet = emptyUniqSet
1461 unitIdSet = unitUniqSet
1462 addOneToIdSet = addOneToUniqSet
1463 intersectIdSets = intersectUniqSets
1464 unionIdSets = unionUniqSets
1465 unionManyIdSets = unionManyUniqSets
1466 idSetToList = uniqSetToList
1467 elementOfIdSet = elementOfUniqSet
1468 minusIdSet = minusUniqSet
1469 isEmptyIdSet = isEmptyUniqSet
1474 addId, nmbrId, nmbrDataCon :: Id -> NmbrM Id
1476 addId id@(Id u n ty det prag info) nenv@(NmbrEnv ui ut uu idenv tvenv uvenv)
1477 = case (lookupUFM_Directly idenv u) of
1478 Just xx -> trace "addId: already in map!" $
1481 if toplevelishId id then
1482 trace "addId: can't add toplevelish!" $
1484 else -- alloc a new unique for this guy
1485 -- and add an entry in the idenv
1486 -- NB: *** KNOT-TYING ***
1488 nenv_plus_id = NmbrEnv (incrUnique ui) ut uu
1489 (addToUFM_Directly idenv u new_id)
1492 (nenv2, new_ty) = nmbrType ty nenv_plus_id
1493 (nenv3, new_det) = nmbr_details det nenv2
1495 new_id = Id ui n new_ty new_det prag info
1499 nmbrId id@(Id u n ty det prag info) nenv@(NmbrEnv ui ut uu idenv tvenv uvenv)
1500 = case (lookupUFM_Directly idenv u) of
1501 Just xx -> (nenv, xx)
1503 if not (toplevelishId id) then
1504 trace "nmbrId: lookup failed" $
1508 (nenv2, new_ty) = nmbrType ty nenv
1509 (nenv3, new_det) = nmbr_details det nenv2
1511 new_id = Id u n new_ty new_det prag info
1515 -- used when renumbering TyCons to produce data decls...
1516 nmbrDataCon id@(Id _ _ _ (TupleConId _) _ _) nenv
1517 = (nenv, id) -- nothing to do for tuples
1519 nmbrDataCon id@(Id u n ty (AlgConId tag marks fields tvs theta con_tvs con_theta arg_tys tc) prag info)
1520 nenv@(NmbrEnv ui ut uu idenv tvenv uvenv)
1521 = case (lookupUFM_Directly idenv u) of
1522 Just xx -> trace "nmbrDataCon: in env???\n" (nenv, xx)
1525 (nenv2, new_fields) = (mapNmbr nmbrField fields) nenv
1526 (nenv3, new_arg_tys) = (mapNmbr nmbrType arg_tys) nenv2
1528 new_det = AlgConId tag marks new_fields (bottom "tvs") (bottom "theta") (bottom "tvs") (bottom "theta") new_arg_tys tc
1529 new_id = Id u n (bottom "ty") new_det prag info
1533 bottom msg = panic ("nmbrDataCon"++msg)
1536 nmbr_details :: IdDetails -> NmbrM IdDetails
1538 nmbr_details (AlgConId tag marks fields tvs theta con_tvs con_theta arg_tys tc)
1539 = mapNmbr nmbrTyVar tvs `thenNmbr` \ new_tvs ->
1540 mapNmbr nmbrTyVar con_tvs `thenNmbr` \ new_con_tvs ->
1541 mapNmbr nmbrField fields `thenNmbr` \ new_fields ->
1542 mapNmbr nmbr_theta theta `thenNmbr` \ new_theta ->
1543 mapNmbr nmbr_theta con_theta `thenNmbr` \ new_con_theta ->
1544 mapNmbr nmbrType arg_tys `thenNmbr` \ new_arg_tys ->
1545 returnNmbr (AlgConId tag marks new_fields new_tvs new_theta new_con_tvs new_con_theta new_arg_tys tc)
1548 = --nmbrClass c `thenNmbr` \ new_c ->
1549 nmbrType t `thenNmbr` \ new_t ->
1550 returnNmbr (c, new_t)
1552 -- ToDo:add more cases as needed
1553 nmbr_details other_details = returnNmbr other_details
1556 nmbrField (FieldLabel n ty tag)
1557 = nmbrType ty `thenNmbr` \ new_ty ->
1558 returnNmbr (FieldLabel n new_ty tag)