\section[MkIface]{Print an interface for a module}
\begin{code}
-module MkIface ( writeIface ) where
+module MkIface (
+ mkModDetails, mkModDetailsFromIface, completeIface, writeIface
+ ) where
#include "HsVersions.h"
-import IO ( Handle, hPutStr, openFile,
- hClose, hPutStrLn, IOMode(..) )
-
import HsSyn
-import HsCore ( HsIdInfo(..), toUfExpr )
-import RdrHsSyn ( RdrNameRuleDecl )
-import HsPragmas ( DataPragmas(..), ClassPragmas(..) )
+import HsCore ( HsIdInfo(..), UfExpr(..), toUfExpr, toUfBndr )
import HsTypes ( toHsTyVars )
-import BasicTypes ( Fixity(..), FixityDirection(..), NewOrData(..),
- Version, bumpVersion, initialVersion, isLoopBreaker
+import BasicTypes ( Fixity(..), NewOrData(..),
+ Version, initialVersion, bumpVersion, isLoopBreaker
)
import RnMonad
-
-import TcInstUtil ( InstInfo(..) )
+import RnHsSyn ( RenamedInstDecl, RenamedTyClDecl )
+import TcHsSyn ( TypecheckedRuleDecl )
+import HscTypes ( VersionInfo(..), IfaceDecls(..), ModIface(..), ModDetails(..),
+ TyThing(..), DFunId, TypeEnv, isTyClThing, Avails,
+ WhatsImported(..), GenAvailInfo(..),
+ ImportVersion, AvailInfo, Deprecations(..),
+ Finder, ModuleLocation(..)
+ )
import CmdLineOpts
-import Id ( Id, idType, idInfo, omitIfaceSigForId, isUserExportedId,
- idSpecialisation
+import Id ( Id, idType, idInfo, omitIfaceSigForId, isUserExportedId, hasNoBinding,
+ idSpecialisation, idName, setIdInfo
)
import Var ( isId )
import VarSet
import DataCon ( StrictnessMark(..), dataConSig, dataConFieldLabels, dataConStrictMarks )
-import IdInfo ( IdInfo, StrictnessInfo(..), ArityInfo(..), InlinePragInfo(..),
- CprInfo(..), CafInfo(..),
- inlinePragInfo, arityInfo, arityLowerBound,
- strictnessInfo, isBottomingStrictness,
- cafInfo, specInfo, cprInfo,
- occInfo, isNeverInlinePrag,
- workerExists, workerInfo, WorkerInfo(..)
+import IdInfo -- Lots
+import CoreSyn ( CoreExpr, CoreBind, Bind(..), CoreRule(..), IdCoreRule,
+ isBuiltinRule, rulesRules, rulesRhsFreeVars, emptyCoreRules,
+ bindersOfBinds
)
-import CoreSyn ( CoreExpr, CoreBind, Bind(..), isBuiltinRule, rulesRules, rulesRhsFreeVars )
import CoreFVs ( exprSomeFreeVars, ruleSomeLhsFreeVars, ruleSomeFreeVars )
-import CoreUnfold ( okToUnfoldInHiFile, couldBeSmallEnoughToInline )
-import Module ( moduleString, pprModule, pprModuleName, moduleUserString )
-import Name ( isLocallyDefined, isWiredInName, toRdrName, nameModule,
- Name, NamedThing(..)
+import CoreUnfold ( okToUnfoldInHiFile, mkTopUnfolding, neverUnfold, unfoldingTemplate, noUnfolding )
+import Name ( isLocallyDefined, getName,
+ Name, NamedThing(..),
+ plusNameEnv, lookupNameEnv, emptyNameEnv, mkNameEnv,
+ extendNameEnv, lookupNameEnv_NF, nameEnvElts
)
-import OccName ( OccName, pprOccName )
+import OccName ( pprOccName )
import TyCon ( TyCon, getSynTyConDefn, isSynTyCon, isNewTyCon, isAlgTyCon,
tyConTheta, tyConTyVars, tyConDataCons, tyConFamilySize
)
-import Class ( Class, classExtraBigSig )
-import FieldLabel ( fieldLabelName, fieldLabelType )
-import Type ( mkSigmaTy, splitSigmaTy, mkDictTy, tidyTopType,
- deNoteType, classesToPreds,
- Type, ThetaType, PredType(..), ClassContext
- )
-
-import PprType
-import Rules ( pprProtoCoreRule, ProtoCoreRule(..) )
-
-import Bag ( bagToList, isEmptyBag )
-import Maybes ( catMaybes, maybeToBool )
-import UniqFM ( lookupUFM, listToUFM )
-import Util ( sortLt, mapAccumL )
+import Class ( classExtraBigSig, DefMeth(..) )
+import FieldLabel ( fieldLabelType )
+import Type ( splitSigmaTy, tidyTopType, deNoteType )
import SrcLoc ( noSrcLoc )
-import Bag
import Outputable
+import Module ( ModuleName, moduleName )
-import Maybe ( isNothing )
-import Monad ( when )
+import List ( partition )
+import IO ( IOMode(..), openFile, hClose )
\end{code}
%************************************************************************
\begin{code}
-writeIface this_mod old_iface new_iface
- local_tycons local_classes inst_info
- final_ids tidy_binds tidy_orphan_rules
- =
- if isNothing opt_HiDir && isNothing opt_HiFile
- then return () -- not producing any .hi file
- else
-
- let
- hi_suf = case opt_HiSuf of { Nothing -> "hi"; Just suf -> suf }
- filename = case opt_HiFile of {
- Just f -> f;
- Nothing ->
- case opt_HiDir of {
- Just dir -> dir ++ '/':moduleUserString this_mod
- ++ '.':hi_suf;
- Nothing -> panic "writeIface"
- }}
- in
-
- case checkIface old_iface full_new_iface of {
- Nothing -> when opt_D_dump_rn_trace $
- putStrLn "Interface file unchanged" ; -- No need to update .hi file
-
- Just final_iface ->
-
- do let mod_vers_unchanged = case old_iface of
- Just iface -> pi_vers iface == pi_vers final_iface
- Nothing -> False
- when (mod_vers_unchanged && opt_D_dump_rn_trace) $
- putStrLn "Module version unchanged, but usages differ; hence need new hi file"
-
- if_hdl <- openFile filename WriteMode
- printForIface if_hdl (pprIface final_iface)
- hClose if_hdl
- }
+mkModDetails :: TypeEnv -> [DFunId] -- From typechecker
+ -> [CoreBind] -> [Id] -- Final bindings, plus the top-level Ids from the
+ -- code generator; they have authoritative arity info
+ -> [IdCoreRule] -- Tidy orphan rules
+ -> ModDetails
+mkModDetails type_env dfun_ids tidy_binds stg_ids orphan_rules
+ = ModDetails { md_types = new_type_env,
+ md_rules = rule_dcls,
+ md_insts = dfun_ids }
+ where
+ -- The competed type environment is gotten from
+ -- a) keeping the types and classes
+ -- b) removing all Ids, and Ids with correct IdInfo
+ -- gotten from the bindings
+ new_type_env = mkNameEnv [(getName tycl, tycl) | tycl <- orig_type_env, isTyClThing tycl]
+ `plusNameEnv`
+ mkNameEnv [(idName id, AnId id) | id <- final_ids]
+
+ orig_type_env = nameEnvElts type_env
+
+ final_ids = bindsToIds (mkVarSet dfun_ids `unionVarSet` orphan_rule_ids)
+ (mkVarSet stg_ids)
+ tidy_binds
+
+ -- The complete rules are gotten by combining
+ -- a) the orphan rules
+ -- b) rules embedded in the top-level Ids
+ rule_dcls | opt_OmitInterfacePragmas = []
+ | otherwise = getRules orphan_rules tidy_binds (mkVarSet final_ids)
+
+ orphan_rule_ids = unionVarSets [ ruleSomeFreeVars interestingId rule
+ | (_, rule) <- orphan_rules]
+
+
+-- This version is used when we are re-linking a module
+-- so we've only run the type checker on its previous interface
+mkModDetailsFromIface :: TypeEnv -> [DFunId] -- From typechecker
+ -> [TypecheckedRuleDecl]
+ -> ModDetails
+mkModDetailsFromIface type_env dfun_ids rules
+ = ModDetails { md_types = type_env,
+ md_rules = rule_dcls,
+ md_insts = dfun_ids }
+ where
+ rule_dcls = [(id,rule) | IfaceRuleOut id rule <- rules]
+ -- All the rules from an interface are of the IfaceRuleOut form
+
+
+completeIface :: Maybe ModIface -- The old interface, if we have it
+ -> ModIface -- The new one, minus the decls and versions
+ -> ModDetails -- The ModDetails for this module
+ -> Maybe (ModIface, SDoc) -- The new one, complete with decls and versions
+ -- The SDoc is a debug document giving differences
+ -- Nothing => no change
+
+ -- NB: 'Nothing' means that even the usages havn't changed, so there's no
+ -- need to write a new interface file. But even if the usages have
+ -- changed, the module version may not have.
+ --
+ -- The IO in the type is solely for debug output
+ -- In particular, dumping a record of what has changed
+completeIface maybe_old_iface new_iface mod_details
+ = addVersionInfo maybe_old_iface (new_iface { mi_decls = new_decls })
where
- full_new_iface = completeIface new_iface local_tycons local_classes
- inst_info final_ids tidy_binds
- tidy_orphan_rules
+ new_decls = IfaceDecls { dcl_tycl = ty_cls_dcls,
+ dcl_insts = inst_dcls,
+ dcl_rules = rule_dcls }
+
+ inst_dcls = map ifaceInstance (md_insts mod_details)
+ ty_cls_dcls = map ifaceTyCls (nameEnvElts (md_types mod_details))
+ rule_dcls = map ifaceRule (md_rules mod_details)
\end{code}
%************************************************************************
%* *
-\subsection{Checking if the new interface is up to date
+\subsection{Types and classes}
%* *
%************************************************************************
\begin{code}
-checkIface :: Maybe ParsedIface -- The old interface, read from M.hi
- -> ParsedIface -- The new interface; but with all version numbers = 1
- -> Maybe ParsedIface -- Nothing => no change; no need to write new Iface
- -- Just pi => Here is the new interface to write
- -- with correct version numbers
-
--- NB: the fixities, declarations, rules are all assumed
--- to be sorted by increasing order of hsDeclName, so that
--- we can compare for equality
-
-checkIface Nothing new_iface
--- No old interface, so definitely write a new one!
- = Just new_iface
-
-checkIface (Just iface) new_iface
- | no_output_change && no_usage_change
- = Nothing
-
- | otherwise -- Add updated version numbers
- =
-{- pprTrace "checkIface" (
- vcat [ppr no_decl_changed <+> ppr no_export_change <+> ppr no_usage_change,
- text "--------",
- vcat (map ppr (pi_decls iface)),
- text "--------",
- vcat (map ppr (pi_decls new_iface))
- ]) $
--}
- Just (new_iface { pi_vers = new_mod_vers,
- pi_fixity = (new_fixity_vers, new_fixities),
- pi_rules = (new_rules_vers, new_rules),
- pi_decls = final_decls
- })
-
+ifaceTyCls :: TyThing -> RenamedTyClDecl
+ifaceTyCls (AClass clas)
+ = ClassDecl (toHsContext sc_theta)
+ (getName clas)
+ (toHsTyVars clas_tyvars)
+ (toHsFDs clas_fds)
+ (map toClassOpSig op_stuff)
+ EmptyMonoBinds
+ [] noSrcLoc
where
- no_usage_change = pi_usages iface == pi_usages new_iface
-
- no_output_change = no_decl_changed &&
- new_fixity_vers == fixity_vers &&
- new_rules_vers == rules_vers &&
- no_export_change
-
- no_export_change = pi_exports iface == pi_exports new_iface
-
- new_mod_vers | no_output_change = mod_vers
- | otherwise = bumpVersion mod_vers
-
- mod_vers = pi_vers iface
-
- (fixity_vers, fixities) = pi_fixity iface
- (_, new_fixities) = pi_fixity new_iface
- new_fixity_vers | fixities == new_fixities = fixity_vers
- | otherwise = bumpVersion fixity_vers
-
- (rules_vers, rules) = pi_rules iface
- (_, new_rules) = pi_rules new_iface
- new_rules_vers | rules == new_rules = rules_vers
- | otherwise = bumpVersion rules_vers
-
- (no_decl_changed, final_decls) = merge_decls True [] (pi_decls iface) (pi_decls new_iface)
+ (clas_tyvars, clas_fds, sc_theta, _, op_stuff) = classExtraBigSig clas
- -- Fill in the version number on the new declarations
- -- by looking at the old declarations.
- -- Set the flag if anything changes.
- -- Assumes that the decls are sorted by hsDeclName
- merge_decls ok_so_far acc [] [] = (ok_so_far, reverse acc)
- merge_decls ok_so_far acc old [] = (False, reverse acc)
- merge_decls ok_so_far acc [] (nvd:nvds) = merge_decls False (nvd:acc) [] nvds
- merge_decls ok_so_far acc (vd@(v,d):vds) (nvd@(_,nd):nvds)
- = case d_name `compare` nd_name of
- LT -> merge_decls False acc vds (nvd:nvds)
- GT -> merge_decls False (nvd:acc) (vd:vds) nvds
- EQ | d == nd -> merge_decls ok_so_far (vd:acc) vds nvds
- | otherwise -> merge_decls False ((bumpVersion v, nd):acc) vds nvds
+ toClassOpSig (sel_id, def_meth)
+ = ASSERT(sel_tyvars == clas_tyvars)
+ ClassOpSig (getName sel_id) (Just def_meth') (toHsType op_ty) noSrcLoc
where
- d_name = hsDeclName d
- nd_name = hsDeclName nd
-\end{code}
-
-
-
-%************************************************************************
-%* *
-\subsection{Printing the interface}
-%* *
-%************************************************************************
+ (sel_tyvars, _, op_ty) = splitSigmaTy (idType sel_id)
+ def_meth' = case def_meth of
+ NoDefMeth -> NoDefMeth
+ GenDefMeth -> GenDefMeth
+ DefMeth id -> DefMeth (getName id)
-\begin{code}
-pprIface (ParsedIface { pi_mod = mod, pi_vers = mod_vers, pi_orphan = orphan,
- pi_usages = usages, pi_exports = exports,
- pi_fixity = (fix_vers, fixities),
- pi_insts = insts, pi_decls = decls,
- pi_rules = (rule_vers, rules), pi_deprecs = deprecs })
- = vcat [ ptext SLIT("__interface")
- <+> doubleQuotes (ptext opt_InPackage)
- <+> ppr mod <+> ppr mod_vers <+> pp_sub_vers
- <+> (if orphan then char '!' else empty)
- <+> int opt_HiVersion
- <+> ptext SLIT("where")
- , vcat (map pprExport exports)
- , vcat (map pprUsage usages)
- , pprFixities fixities
- , vcat [ppr i <+> semi | i <- insts]
- , vcat [ppr_vers v <+> ppr d <> semi | (v,d) <- decls]
- , pprRules rules
- , pprDeprecs deprecs
- ]
+ifaceTyCls (ATyCon tycon)
+ | isSynTyCon tycon
+ = TySynonym (getName tycon)(toHsTyVars tyvars) (toHsType ty) noSrcLoc
where
- ppr_vers v | v == initialVersion = empty
- | otherwise = int v
- pp_sub_vers
- | fix_vers == initialVersion && rule_vers == initialVersion = empty
- | otherwise = brackets (ppr fix_vers <+> ppr rule_vers)
-\end{code}
-
-When printing export lists, we print like this:
- Avail f f
- AvailTC C [C, x, y] C(x,y)
- AvailTC C [x, y] C!(x,y) -- Exporting x, y but not C
+ (tyvars, ty) = getSynTyConDefn tycon
-\begin{code}
-pprExport :: ExportItem -> SDoc
-pprExport (mod, items)
- = hsep [ ptext SLIT("__export "), ppr mod, hsep (map upp_avail items) ] <> semi
+ifaceTyCls (ATyCon tycon)
+ | isAlgTyCon tycon
+ = TyData new_or_data (toHsContext (tyConTheta tycon))
+ (getName tycon)
+ (toHsTyVars tyvars)
+ (map ifaceConDecl (tyConDataCons tycon))
+ (tyConFamilySize tycon)
+ Nothing noSrcLoc (panic "gen1") (panic "gen2")
where
- upp_avail :: RdrAvailInfo -> SDoc
- upp_avail (Avail name) = pprOccName name
- upp_avail (AvailTC name []) = empty
- upp_avail (AvailTC name ns) = hcat [pprOccName name, bang, upp_export ns']
- where
- bang | name `elem` ns = empty
- | otherwise = char '|'
- ns' = filter (/= name) ns
-
- upp_export [] = empty
- upp_export names = braces (hsep (map pprOccName names))
-\end{code}
+ tyvars = tyConTyVars tycon
+ new_or_data | isNewTyCon tycon = NewType
+ | otherwise = DataType
+ ifaceConDecl data_con
+ = ConDecl (getName data_con) (error "ifaceConDecl")
+ (toHsTyVars ex_tyvars)
+ (toHsContext ex_theta)
+ details noSrcLoc
+ where
+ (tyvars1, _, ex_tyvars, ex_theta, arg_tys, tycon1) = dataConSig data_con
+ field_labels = dataConFieldLabels data_con
+ strict_marks = dataConStrictMarks data_con
+ details | null field_labels
+ = ASSERT( tycon == tycon1 && tyvars == tyvars1 )
+ VanillaCon (zipWith mk_bang_ty strict_marks arg_tys)
-\begin{code}
-pprUsage :: ImportVersion OccName -> SDoc
-pprUsage (m, has_orphans, is_boot, whats_imported)
- = hsep [ptext SLIT("import"), pprModuleName m,
- pp_orphan, pp_boot,
- upp_import_versions whats_imported
- ] <> semi
- where
- pp_orphan | has_orphans = char '!'
- | otherwise = empty
- pp_boot | is_boot = char '@'
- | otherwise = empty
+ | otherwise
+ = RecCon (zipWith mk_field strict_marks field_labels)
- -- Importing the whole module is indicated by an empty list
- upp_import_versions NothingAtAll = empty
- upp_import_versions (Everything v) = dcolon <+> int v
- upp_import_versions (Specifically vm vf vr nvs)
- = dcolon <+> int vm <+> int vf <+> int vr <+> hsep [ ppr n <+> int v | (n,v) <- nvs ]
-\end{code}
+ mk_bang_ty NotMarkedStrict ty = Unbanged (toHsType ty)
+ mk_bang_ty (MarkedUnboxed _ _) ty = Unpacked (toHsType ty)
+ mk_bang_ty MarkedStrict ty = Banged (toHsType ty)
+ mk_field strict_mark field_label
+ = ([getName field_label], mk_bang_ty strict_mark (fieldLabelType field_label))
-\begin{code}
-pprFixities [] = empty
-pprFixities fixes = hsep (map ppr fixes) <> semi
+ifaceTyCls (ATyCon tycon) = pprPanic "ifaceTyCls" (ppr tycon)
-pprRules [] = empty
-pprRules rules = hsep [ptext SLIT("{-## __R"), hsep (map ppr rules), ptext SLIT("##-}")]
+ifaceTyCls (AnId id)
+ = IfaceSig (getName id) (toHsType id_type) hs_idinfo noSrcLoc
+ where
+ id_type = idType id
+ id_info = idInfo id
-pprDeprecs [] = empty
-pprDeprecs deps = hsep [ ptext SLIT("{-## __D"), guts, ptext SLIT("##-}")]
- where
- guts = hsep [ ppr ie <+> doubleQuotes (ppr txt) <> semi
- | Deprecation ie txt _ <- deps ]
-\end{code}
+ hs_idinfo | opt_OmitInterfacePragmas = []
+ | otherwise = arity_hsinfo ++ caf_hsinfo ++ cpr_hsinfo ++
+ strict_hsinfo ++ wrkr_hsinfo ++ unfold_hsinfo
+ ------------ Arity --------------
+ arity_hsinfo = case arityInfo id_info of
+ a@(ArityExactly n) -> [HsArity a]
+ other -> []
-%************************************************************************
-%* *
-\subsection{Completing the new interface}
-%* *
-%************************************************************************
+ ------------ Caf Info --------------
+ caf_hsinfo = case cafInfo id_info of
+ NoCafRefs -> [HsNoCafRefs]
+ otherwise -> []
-\begin{code}
-completeIface new_iface local_tycons local_classes
- inst_info final_ids tidy_binds
- tidy_orphan_rules
- = new_iface { pi_decls = [(initialVersion,d) | d <- sortLt lt_decl all_decls],
- pi_insts = sortLt lt_inst_decl inst_dcls,
- pi_rules = (initialVersion, rule_dcls)
- }
- where
- all_decls = cls_dcls ++ ty_dcls ++ bagToList val_dcls
- (inst_dcls, inst_ids) = ifaceInstances inst_info
- cls_dcls = map ifaceClass local_classes
- ty_dcls = map ifaceTyCon (filter (not . isWiredInName . getName) local_tycons)
+ ------------ CPR Info --------------
+ cpr_hsinfo = case cprInfo id_info of
+ ReturnsCPR -> [HsCprInfo]
+ NoCPRInfo -> []
- (val_dcls, emitted_ids) = ifaceBinds (inst_ids `unionVarSet` orphan_rule_ids)
- final_ids tidy_binds
+ ------------ Strictness --------------
+ strict_hsinfo = case strictnessInfo id_info of
+ NoStrictnessInfo -> []
+ info -> [HsStrictness info]
- rule_dcls | opt_OmitInterfacePragmas = []
- | otherwise = ifaceRules tidy_orphan_rules emitted_ids
- orphan_rule_ids = unionVarSets [ ruleSomeFreeVars interestingId rule
- | ProtoCoreRule _ _ rule <- tidy_orphan_rules]
+ ------------ Worker --------------
+ wrkr_hsinfo = case workerInfo id_info of
+ HasWorker work_id wrap_arity -> [HsWorker (getName work_id)]
+ NoWorker -> []
-lt_decl d1 d2 = hsDeclName d1 < hsDeclName d2
-lt_inst_decl d1 d2 = instDeclName d1 < instDeclName d2
- -- Even instance decls have names, namely the dfun name
+ ------------ Unfolding --------------
+ unfold_info = unfoldingInfo id_info
+ inline_prag = inlinePragInfo id_info
+ rhs = unfoldingTemplate unfold_info
+ unfold_hsinfo | neverUnfold unfold_info = []
+ | otherwise = [HsUnfold inline_prag (toUfExpr rhs)]
\end{code}
%************************************************************************
%* *
-\subsection{Completion stuff}
+\subsection{Instances and rules}
%* *
%************************************************************************
-\begin{code}
-ifaceRules :: [ProtoCoreRule] -> IdSet -> [RdrNameRuleDecl]
-ifaceRules rules emitted
- = orphan_rules ++ local_rules
- where
- orphan_rules = [ toHsRule fn rule | ProtoCoreRule _ fn rule <- rules ]
- local_rules = [ toHsRule fn rule
- | fn <- varSetElems emitted,
- rule <- rulesRules (idSpecialisation fn),
- not (isBuiltinRule rule),
- -- We can't print builtin rules in interface files
- -- Since they are built in, an importing module
- -- will have access to them anyway
- all (`elemVarSet` emitted) (varSetElems (ruleSomeLhsFreeVars interestingId rule))
- -- Spit out a rule only if all its lhs free vars are emitted
- -- This is a good reason not to do it when we emit the Id itself
- ]
-\end{code}
-
\begin{code}
-ifaceInstances :: Bag InstInfo -> ([RdrNameInstDecl], IdSet)
- -- The IdSet is the needed dfuns
-
-ifaceInstances inst_infos
- = (decls, needed_ids)
- where
- decls = map to_decl togo_insts
- togo_insts = filter is_togo_inst (bagToList inst_infos)
- needed_ids = mkVarSet [dfun_id | InstInfo _ _ _ _ dfun_id _ _ _ <- togo_insts]
- is_togo_inst (InstInfo _ _ _ _ dfun_id _ _ _) = isLocallyDefined dfun_id
-
- -------
- to_decl (InstInfo clas tvs tys theta dfun_id _ _ _)
- = let
+ifaceInstance :: DFunId -> RenamedInstDecl
+ifaceInstance dfun_id
+ = InstDecl (toHsType tidy_ty) EmptyMonoBinds [] (Just (getName dfun_id)) noSrcLoc
+ where
+ tidy_ty = tidyTopType (deNoteType (idType dfun_id))
-- The deNoteType is very important. It removes all type
-- synonyms from the instance type in interface files.
-- That in turn makes sure that when reading in instance decls
-- instance Foo Tibble where ...
-- and this instance decl wouldn't get imported into a module
-- that mentioned T but not Tibble.
- forall_ty = mkSigmaTy tvs (classesToPreds theta)
- (deNoteType (mkDictTy clas tys))
- tidy_ty = tidyTopType forall_ty
- in
- InstDecl (toHsType tidy_ty) EmptyMonoBinds [] (Just (toRdrName dfun_id)) noSrcLoc
-\end{code}
-\begin{code}
-ifaceTyCon :: TyCon -> RdrNameHsDecl
-ifaceTyCon tycon
- | isSynTyCon tycon
- = TyClD (TySynonym (toRdrName tycon)
- (toHsTyVars tyvars) (toHsType ty)
- noSrcLoc)
- where
- (tyvars, ty) = getSynTyConDefn tycon
-
-ifaceTyCon tycon
- | isAlgTyCon tycon
- = TyClD (TyData new_or_data (toHsContext (tyConTheta tycon))
- (toRdrName tycon)
- (toHsTyVars tyvars)
- (map ifaceConDecl (tyConDataCons tycon))
- (tyConFamilySize tycon)
- Nothing NoDataPragmas noSrcLoc)
- where
- tyvars = tyConTyVars tycon
- new_or_data | isNewTyCon tycon = NewType
- | otherwise = DataType
-
- ifaceConDecl data_con
- = ConDecl (toRdrName data_con) (error "ifaceConDecl")
- (toHsTyVars ex_tyvars)
- (toHsContext ex_theta)
- details noSrcLoc
- where
- (tyvars1, _, ex_tyvars, ex_theta, arg_tys, tycon1) = dataConSig data_con
- field_labels = dataConFieldLabels data_con
- strict_marks = dataConStrictMarks data_con
- details
- | null field_labels
- = ASSERT( tycon == tycon1 && tyvars == tyvars1 )
- VanillaCon (zipWith mk_bang_ty strict_marks arg_tys)
+ifaceRule (id, BuiltinRule _)
+ = pprTrace "toHsRule: builtin" (ppr id) (bogusIfaceRule id)
- | otherwise
- = RecCon (zipWith mk_field strict_marks field_labels)
+ifaceRule (id, Rule name bndrs args rhs)
+ = IfaceRule name (map toUfBndr bndrs) (getName id)
+ (map toUfExpr args) (toUfExpr rhs) noSrcLoc
- mk_bang_ty NotMarkedStrict ty = Unbanged (toHsType ty)
- mk_bang_ty (MarkedUnboxed _ _) ty = Unpacked (toHsType ty)
- mk_bang_ty MarkedStrict ty = Banged (toHsType ty)
-
- mk_field strict_mark field_label
- = ([toRdrName field_label], mk_bang_ty strict_mark (fieldLabelType field_label))
-
-ifaceTyCon tycon
- = pprPanic "pprIfaceTyDecl" (ppr tycon)
-
-ifaceClass clas
- = TyClD (ClassDecl (toHsContext sc_theta)
- (toRdrName clas)
- (toHsTyVars clas_tyvars)
- (toHsFDs clas_fds)
- (map toClassOpSig op_stuff)
- EmptyMonoBinds NoClassPragmas
- bogus bogus bogus [] noSrcLoc
- )
- where
- bogus = error "ifaceClass"
- (clas_tyvars, clas_fds, sc_theta, _, op_stuff) = classExtraBigSig clas
-
- toClassOpSig (sel_id, dm_id, explicit_dm)
- = ASSERT( sel_tyvars == clas_tyvars)
- ClassOpSig (toRdrName sel_id) (Just (bogus, explicit_dm)) (toHsType op_ty) noSrcLoc
- where
- (sel_tyvars, _, op_ty) = splitSigmaTy (idType sel_id)
+bogusIfaceRule id
+ = IfaceRule SLIT("bogus") [] (getName id) [] (UfVar (getName id)) noSrcLoc
\end{code}
%************************************************************************
%* *
-\subsection{Value bindings}
-%* *
+\subsection{Compute final Ids}
+%* *
%************************************************************************
+A "final Id" has exactly the IdInfo for going into an interface file, or
+exporting to another module.
+
\begin{code}
-ifaceBinds :: IdSet -- These Ids are needed already
- -> [Id] -- Ids used at code-gen time; they have better pragma info!
+bindsToIds :: IdSet -- These Ids are needed already
+ -> IdSet -- Ids used at code-gen time; they have better pragma info!
-> [CoreBind] -- In dependency order, later depend on earlier
- -> (Bag RdrNameHsDecl, IdSet) -- Set of Ids actually spat out
+ -> [Id] -- Set of Ids actually spat out, complete with exactly the IdInfo
+ -- they need for exporting to another module
-ifaceBinds needed_ids final_ids binds
- = go needed_ids (reverse binds) emptyBag emptyVarSet
+bindsToIds needed_ids codegen_ids binds
+ = go needed_ids (reverse binds) []
-- Reverse so that later things will
-- provoke earlier ones to be emitted
where
- final_id_map = listToUFM [(id,id) | id <- final_ids]
- get_idinfo id = case lookupUFM final_id_map id of
- Just id' -> idInfo id'
- Nothing -> pprTrace "ifaceBinds not found:" (ppr id) $
- idInfo id
+ -- The 'needed' set contains the Ids that are needed by earlier
+ -- interface file emissions. If the Id isn't in this set, and isn't
+ -- exported, there's no need to emit anything
+ need_id needed_set id = id `elemVarSet` needed_set || isUserExportedId id
- go needed [] decls emitted
+ go needed [] emitted
| not (isEmptyVarSet needed) = pprTrace "ifaceBinds: free vars:"
(sep (map ppr (varSetElems needed)))
- (decls, emitted)
- | otherwise = (decls, emitted)
-
- go needed (NonRec id rhs : binds) decls emitted
- = case ifaceId get_idinfo needed False id rhs of
- Nothing -> go needed binds decls emitted
- Just (decl, extras) -> let
- needed' = (needed `unionVarSet` extras) `delVarSet` id
- -- 'extras' can include the Id itself via a rule
- emitted' = emitted `extendVarSet` id
- in
- go needed' binds (decl `consBag` decls) emitted'
+ emitted
+ | otherwise = emitted
+
+ go needed (NonRec id rhs : binds) emitted
+ | need_id needed id
+ = if omitIfaceSigForId id then
+ go (needed `delVarSet` id) binds (id:emitted)
+ else
+ go ((needed `unionVarSet` extras) `delVarSet` id)
+ binds
+ (new_id:emitted)
+ | otherwise
+ = go needed binds emitted
+ where
+ (new_id, extras) = mkFinalId codegen_ids False id rhs
-- Recursive groups are a bit more of a pain. We may only need one to
-- start with, but it may call out the next one, and so on. So we
- -- have to look for a fixed point.
- go needed (Rec pairs : binds) decls emitted
- = go needed' binds decls' emitted'
+ -- have to look for a fixed point. We don't want necessarily them all,
+ -- because without -O we may only need the first one (if we don't emit
+ -- its unfolding)
+ go needed (Rec pairs : binds) emitted
+ = go needed' binds emitted'
where
- (new_decls, new_emitted, extras) = go_rec needed pairs
- decls' = new_decls `unionBags` decls
+ (new_emitted, extras) = go_rec needed pairs
needed' = (needed `unionVarSet` extras) `minusVarSet` mkVarSet (map fst pairs)
- emitted' = emitted `unionVarSet` new_emitted
+ emitted' = new_emitted ++ emitted
- go_rec :: IdSet -> [(Id,CoreExpr)] -> (Bag RdrNameHsDecl, IdSet, IdSet)
+ go_rec :: IdSet -> [(Id,CoreExpr)] -> ([Id], IdSet)
go_rec needed pairs
- | null decls = (emptyBag, emptyVarSet, emptyVarSet)
- | otherwise = (more_decls `unionBags` listToBag decls,
- more_emitted `unionVarSet` mkVarSet emitted,
- more_extras `unionVarSet` extras)
+ | null needed_prs = ([], emptyVarSet)
+ | otherwise = (emitted ++ more_emitted,
+ extras `unionVarSet` more_extras)
where
- maybes = map do_one pairs
- emitted = [id | ((id,_), Just _) <- pairs `zip` maybes]
- reduced_pairs = [pair | (pair, Nothing) <- pairs `zip` maybes]
- (decls, extras_s) = unzip (catMaybes maybes)
- extras = unionVarSets extras_s
- (more_decls, more_emitted, more_extras) = go_rec extras reduced_pairs
-
- do_one (id,rhs) = ifaceId get_idinfo needed True id rhs
+ (needed_prs,leftover_prs) = partition is_needed pairs
+ (emitted, extras_s) = unzip [ mkFinalId codegen_ids True id rhs
+ | (id,rhs) <- needed_prs, not (omitIfaceSigForId id)]
+ extras = unionVarSets extras_s
+ (more_emitted, more_extras) = go_rec extras leftover_prs
+
+ is_needed (id,_) = need_id needed id
\end{code}
+
\begin{code}
-ifaceId :: (Id -> IdInfo) -- This function "knows" the extra info added
- -- by the STG passes. Sigh
-
- -> IdSet -- Set of Ids that are needed by earlier interface
- -- file emissions. If the Id isn't in this set, and isn't
- -- exported, there's no need to emit anything
- -> Bool -- True <=> recursive, so don't print unfolding
- -> Id
- -> CoreExpr -- The Id's right hand side
- -> Maybe (RdrNameHsDecl, IdSet) -- The emitted stuff, plus any *extra* needed Ids
-
-ifaceId get_idinfo needed_ids is_rec id rhs
- | not (id `elemVarSet` needed_ids || -- Needed [no id in needed_ids has omitIfaceSigForId]
- (isUserExportedId id && not (omitIfaceSigForId id))) -- or exported and not to be omitted
- = Nothing -- Well, that was easy!
-
-ifaceId get_idinfo needed_ids is_rec id rhs
- = ASSERT2( arity_matches_strictness, ppr id )
- Just (SigD (IfaceSig (toRdrName id) (toHsType id_type) hs_idinfo noSrcLoc),
- new_needed_ids)
+mkFinalId :: IdSet -- The Ids with arity info from the code generator
+ -> Bool -- True <=> recursive, so don't include unfolding
+ -> Id
+ -> CoreExpr -- The Id's right hand side
+ -> (Id, IdSet) -- The emitted id, plus any *extra* needed Ids
+
+mkFinalId codegen_ids is_rec id rhs
+ = (id `setIdInfo` new_idinfo, new_needed_ids)
where
- id_type = idType id
core_idinfo = idInfo id
- stg_idinfo = get_idinfo id
+ stg_idinfo = case lookupVarSet codegen_ids id of
+ Just id' -> idInfo id'
+ Nothing -> pprTrace "ifaceBinds not found:" (ppr id) $
+ idInfo id
- hs_idinfo | opt_OmitInterfacePragmas = []
- | otherwise = arity_hsinfo ++ caf_hsinfo ++ cpr_hsinfo ++
- strict_hsinfo ++ wrkr_hsinfo ++ unfold_hsinfo
+ new_idinfo | opt_OmitInterfacePragmas
+ = vanillaIdInfo
+ | otherwise
+ = core_idinfo `setArityInfo` arity_info
+ `setCafInfo` cafInfo stg_idinfo
+ `setUnfoldingInfo` unfold_info
+ `setWorkerInfo` worker_info
+ `setSpecInfo` emptyCoreRules
+ -- We zap the specialisations because they are
+ -- passed on separately through the modules IdCoreRules
------------ Arity --------------
- arity_info = arityInfo stg_idinfo
- arity_hsinfo = case arityInfo stg_idinfo of
- a@(ArityExactly n) -> [HsArity a]
- other -> []
-
- ------------ Caf Info --------------
- caf_hsinfo = case cafInfo stg_idinfo of
- NoCafRefs -> [HsNoCafRefs]
- otherwise -> []
-
- ------------ CPR Info --------------
- cpr_hsinfo = case cprInfo core_idinfo of
- ReturnsCPR -> [HsCprInfo]
- NoCPRInfo -> []
-
- ------------ Strictness --------------
- strict_info = strictnessInfo core_idinfo
- bottoming_fn = isBottomingStrictness strict_info
- strict_hsinfo = case strict_info of
- NoStrictnessInfo -> []
- info -> [HsStrictness info]
-
+ arity_info = arityInfo stg_idinfo
+ stg_arity = arityLowerBound arity_info
------------ Worker --------------
- work_info = workerInfo core_idinfo
- has_worker = workerExists work_info
- wrkr_hsinfo = case work_info of
- HasWorker work_id _ -> [HsWorker (toRdrName work_id)]
- other -> []
+ -- We only treat a function as having a worker if
+ -- the exported arity (which is now the number of visible lambdas)
+ -- is the same as the arity at the moment of the w/w split
+ -- If so, we can safely omit the unfolding inside the wrapper, and
+ -- instead re-generate it from the type/arity/strictness info
+ -- But if the arity has changed, we just take the simple path and
+ -- put the unfolding into the interface file, forgetting the fact
+ -- that it's a wrapper.
+ --
+ -- How can this happen? Sometimes we get
+ -- f = coerce t (\x y -> $wf x y)
+ -- at the moment of w/w split; but the eta reducer turns it into
+ -- f = coerce t $wf
+ -- which is perfectly fine except that the exposed arity so far as
+ -- the code generator is concerned (zero) differs from the arity
+ -- when we did the split (2).
+ --
+ -- All this arises because we use 'arity' to mean "exactly how many
+ -- top level lambdas are there" in interface files; but during the
+ -- compilation of this module it means "how many things can I apply
+ -- this to".
+ worker_info = case workerInfo core_idinfo of
+ info@(HasWorker work_id wrap_arity)
+ | wrap_arity == stg_arity -> info
+ | otherwise -> pprTrace "ifaceId: arity change:" (ppr id)
+ NoWorker
+ NoWorker -> NoWorker
+
+ has_worker = case worker_info of
+ HasWorker _ _ -> True
+ other -> False
+
+ HasWorker work_id _ = worker_info
------------ Unfolding --------------
inline_pragma = inlinePragInfo core_idinfo
dont_inline = isNeverInlinePrag inline_pragma
+ loop_breaker = isLoopBreaker (occInfo core_idinfo)
+ bottoming_fn = isBottomingStrictness (strictnessInfo core_idinfo)
+
+ unfolding = mkTopUnfolding rhs
+ rhs_is_small = neverUnfold unfolding
- unfold_hsinfo | show_unfold = [HsUnfold inline_pragma (toUfExpr rhs)]
- | otherwise = []
+ unfold_info | show_unfold = unfolding
+ | otherwise = noUnfolding
show_unfold = not has_worker && -- Not unnecessary
not bottoming_fn && -- Not necessary
rhs_is_small && -- Small enough
okToUnfoldInHiFile rhs -- No casms etc
- rhs_is_small = couldBeSmallEnoughToInline opt_UF_HiFileThreshold rhs
-
- ------------ Specialisations --------------
- spec_info = specInfo core_idinfo
-
- ------------ Occ info --------------
- loop_breaker = isLoopBreaker (occInfo core_idinfo)
------------ Extra free Ids --------------
new_needed_ids | opt_OmitInterfacePragmas = emptyVarSet
unfold_ids `unionVarSet`
spec_ids
- worker_ids = case work_info of
- HasWorker work_id _ | interestingId work_id -> unitVarSet work_id
+ spec_ids = filterVarSet interestingId (rulesRhsFreeVars (specInfo core_idinfo))
+
+ worker_ids | has_worker && interestingId work_id = unitVarSet work_id
-- Conceivably, the worker might come from
-- another module
- other -> emptyVarSet
-
- spec_ids = filterVarSet interestingId (rulesRhsFreeVars spec_info)
+ | otherwise = emptyVarSet
unfold_ids | show_unfold = find_fvs rhs
| otherwise = emptyVarSet
find_fvs expr = exprSomeFreeVars interestingId expr
- ------------ Sanity checking --------------
- -- The arity of a wrapper function should match its strictness,
- -- or else an importing module will get very confused indeed.
- arity_matches_strictness
- = case work_info of
- HasWorker _ wrap_arity -> wrap_arity == arityLowerBound arity_info
- other -> True
+interestingId id = isId id && isLocallyDefined id && not (hasNoBinding id)
+\end{code}
+
+
+\begin{code}
+getRules :: [IdCoreRule] -- Orphan rules
+ -> [CoreBind] -- Bindings, with rules in the top-level Ids
+ -> IdSet -- Ids that are exported, so we need their rules
+ -> [IdCoreRule]
+getRules orphan_rules binds emitted
+ = orphan_rules ++ local_rules
+ where
+ local_rules = [ (fn, rule)
+ | fn <- bindersOfBinds binds,
+ fn `elemVarSet` emitted,
+ rule <- rulesRules (idSpecialisation fn),
+ not (isBuiltinRule rule),
+ -- We can't print builtin rules in interface files
+ -- Since they are built in, an importing module
+ -- will have access to them anyway
+
+ -- Sept 00: I've disabled this test. It doesn't stop many, if any, rules
+ -- from coming out, and to make it work properly we need to add ????
+ -- (put it back in for now)
+ all (`elemVarSet` emitted) (varSetElems (ruleSomeLhsFreeVars interestingId rule))
+ -- Spit out a rule only if all its lhs free vars are emitted
+ -- This is a good reason not to do it when we emit the Id itself
+ ]
+\end{code}
+
+
+%************************************************************************
+%* *
+\subsection{Checking if the new interface is up to date
+%* *
+%************************************************************************
+
+\begin{code}
+addVersionInfo :: Maybe ModIface -- The old interface, read from M.hi
+ -> ModIface -- The new interface decls
+ -> Maybe (ModIface, SDoc) -- Nothing => no change; no need to write new Iface
+ -- Just mi => Here is the new interface to write
+ -- with correct version numbers
+
+-- NB: the fixities, declarations, rules are all assumed
+-- to be sorted by increasing order of hsDeclName, so that
+-- we can compare for equality
+
+addVersionInfo Nothing new_iface
+-- No old interface, so definitely write a new one!
+ = Just (new_iface, text "No old interface available")
+
+addVersionInfo (Just old_iface@(ModIface { mi_version = old_version,
+ mi_decls = old_decls,
+ mi_fixities = old_fixities }))
+ new_iface@(ModIface { mi_decls = new_decls,
+ mi_fixities = new_fixities })
+
+ | no_output_change && no_usage_change
+ = Nothing
+
+ | otherwise -- Add updated version numbers
+ = Just (final_iface, pp_tc_diffs)
+
+ where
+ final_iface = new_iface { mi_version = new_version }
+ new_version = VersionInfo { vers_module = bumpVersion no_output_change (vers_module old_version),
+ vers_exports = bumpVersion no_export_change (vers_exports old_version),
+ vers_rules = bumpVersion no_rule_change (vers_rules old_version),
+ vers_decls = tc_vers }
+
+ no_output_change = no_tc_change && no_rule_change && no_export_change
+ no_usage_change = mi_usages old_iface == mi_usages new_iface
+
+ no_export_change = mi_exports old_iface == mi_exports new_iface -- Kept sorted
+ no_rule_change = dcl_rules old_decls == dcl_rules new_decls -- Ditto
+
+ -- Fill in the version number on the new declarations by looking at the old declarations.
+ -- Set the flag if anything changes.
+ -- Assumes that the decls are sorted by hsDeclName.
+ old_vers_decls = vers_decls old_version
+ (no_tc_change, pp_tc_diffs, tc_vers) = diffDecls old_vers_decls old_fixities new_fixities
+ (dcl_tycl old_decls) (dcl_tycl new_decls)
+
+
+
+diffDecls :: NameEnv Version -- Old version map
+ -> NameEnv Fixity -> NameEnv Fixity -- Old and new fixities
+ -> [RenamedTyClDecl] -> [RenamedTyClDecl] -- Old and new decls
+ -> (Bool, -- True <=> no change
+ SDoc, -- Record of differences
+ NameEnv Version) -- New version
+
+diffDecls old_vers old_fixities new_fixities old new
+ = diff True empty emptyNameEnv old new
+ where
+ -- When seeing if two decls are the same,
+ -- remember to check whether any relevant fixity has changed
+ eq_tc d1 d2 = d1 == d2 && all (same_fixity . fst) (tyClDeclNames d1)
+ same_fixity n = lookupNameEnv old_fixities n == lookupNameEnv new_fixities n
+
+ diff ok_so_far pp new_vers [] [] = (ok_so_far, pp, new_vers)
+ diff ok_so_far pp new_vers old [] = (False, pp, new_vers)
+ diff ok_so_far pp new_vers [] (nd:nds) = diff False (pp $$ only_new nd) new_vers [] nds
+ diff ok_so_far pp new_vers (od:ods) (nd:nds)
+ = case od_name `compare` nd_name of
+ LT -> diff False (pp $$ only_old od) new_vers ods (nd:nds)
+ GT -> diff False (pp $$ only_new nd) new_vers (od:ods) nds
+ EQ | od `eq_tc` nd -> diff ok_so_far pp new_vers ods nds
+ | otherwise -> diff False (pp $$ changed od nd) new_vers' ods nds
+ where
+ od_name = tyClDeclName od
+ nd_name = tyClDeclName nd
+ new_vers' = extendNameEnv new_vers nd_name
+ (bumpVersion True (lookupNameEnv_NF old_vers od_name))
+
+ only_old d = ptext SLIT("Only in old iface:") <+> ppr d
+ only_new d = ptext SLIT("Only in new iface:") <+> ppr d
+ changed d nd = ptext SLIT("Changed in iface: ") <+> ((ptext SLIT("Old:") <+> ppr d) $$
+ (ptext SLIT("New:") <+> ppr nd))
+\end{code}
+
+
+
+%************************************************************************
+%* *
+\subsection{Writing an interface file}
+%* *
+%************************************************************************
+
+\begin{code}
+writeIface :: Finder -> Maybe ModIface -> IO ()
+writeIface finder Nothing
+ = return ()
+
+writeIface finder (Just mod_iface)
+ = do { maybe_found <- finder mod_name ;
+ ; case maybe_found of {
+ Nothing -> printErrs (text "Can't write interface file for" <+> ppr mod_name) ;
+ Just (_, locn) ->
+
+ do { let filename = hi_file locn
+ ; if_hdl <- openFile filename WriteMode
+ ; printForIface if_hdl (pprIface mod_iface)
+ ; hClose if_hdl
+ }}}
+ where
+ mod_name = moduleName (mi_module mod_iface)
+
+pprIface iface
+ = vcat [ ptext SLIT("__interface")
+ <+> doubleQuotes (ptext opt_InPackage)
+ <+> ppr (mi_module iface) <+> ppr (vers_module version_info)
+ <+> pp_sub_vers
+ <+> (if mi_orphan iface then char '!' else empty)
+ <+> int opt_HiVersion
+ <+> ptext SLIT("where")
+
+ , vcat (map pprExport (mi_exports iface))
+ , vcat (map pprUsage (mi_usages iface))
+
+ , pprIfaceDecls (vers_decls version_info)
+ (mi_fixities iface)
+ (mi_decls iface)
+
+ , pprDeprecs (mi_deprecs iface)
+ ]
+ where
+ version_info = mi_version iface
+ exp_vers = vers_exports version_info
+ rule_vers = vers_rules version_info
+
+ pp_sub_vers | exp_vers == initialVersion && rule_vers == initialVersion = empty
+ | otherwise = brackets (ppr exp_vers <+> ppr rule_vers)
+\end{code}
+
+When printing export lists, we print like this:
+ Avail f f
+ AvailTC C [C, x, y] C(x,y)
+ AvailTC C [x, y] C!(x,y) -- Exporting x, y but not C
+
+\begin{code}
+pprExport :: (ModuleName, Avails) -> SDoc
+pprExport (mod, items)
+ = hsep [ ptext SLIT("__export "), ppr mod, hsep (map pp_avail items) ] <> semi
+ where
+ ppr_name :: Name -> SDoc -- Print the occurrence name only
+ ppr_name n = ppr (nameOccName n)
+
+ pp_avail :: AvailInfo -> SDoc
+ pp_avail (Avail name) = ppr_name name
+ pp_avail (AvailTC name []) = empty
+ pp_avail (AvailTC name ns) = hcat [ppr_name name, bang, pp_export ns']
+ where
+ bang | name `elem` ns = empty
+ | otherwise = char '|'
+ ns' = filter (/= name) ns
-interestingId id = isId id && isLocallyDefined id &&
- not (omitIfaceSigForId id)
+ pp_export [] = empty
+ pp_export names = braces (hsep (map ppr_name names))
\end{code}
+
+\begin{code}
+pprUsage :: ImportVersion Name -> SDoc
+pprUsage (m, has_orphans, is_boot, whats_imported)
+ = hsep [ptext SLIT("import"), ppr m,
+ pp_orphan, pp_boot,
+ pp_versions whats_imported
+ ] <> semi
+ where
+ pp_orphan | has_orphans = char '!'
+ | otherwise = empty
+ pp_boot | is_boot = char '@'
+ | otherwise = empty
+
+ -- Importing the whole module is indicated by an empty list
+ pp_versions NothingAtAll = empty
+ pp_versions (Everything v) = dcolon <+> int v
+ pp_versions (Specifically vm ve nvs vr) = dcolon <+> int vm <+> pp_export_version ve <+> int vr
+ <+> hsep [ ppr n <+> int v | (n,v) <- nvs ]
+
+ -- HACK for the moment: print the export-list version even if
+ -- we don't use it, so that syntax of interface files doesn't change
+ pp_export_version Nothing = int 1
+ pp_export_version (Just v) = int v
+\end{code}
+
+\begin{code}
+pprIfaceDecls version_map fixity_map decls
+ = vcat [ vcat [ppr i <+> semi | i <- dcl_insts decls]
+ , vcat (map ppr_decl (dcl_tycl decls))
+ , pprRules (dcl_rules decls)
+ ]
+ where
+ ppr_decl d = (ppr_vers d <+> ppr d <> semi) $$ ppr_fixes d
+
+ -- Print the version for the decl
+ ppr_vers d = case lookupNameEnv version_map (tyClDeclName d) of
+ Nothing -> empty
+ Just v -> int v
+
+ -- Print fixities relevant to the decl
+ ppr_fixes d = vcat [ ppr fix <+> ppr n <> semi
+ | (n,_) <- tyClDeclNames d,
+ Just fix <- [lookupNameEnv fixity_map n]
+ ]
+\end{code}
+
+\begin{code}
+pprRules [] = empty
+pprRules rules = hsep [ptext SLIT("{-## __R"), vcat (map ppr rules), ptext SLIT("##-}")]
+
+pprDeprecs NoDeprecs = empty
+pprDeprecs deprecs = ptext SLIT("{-## __D") <+> guts <+> ptext SLIT("##-}")
+ where
+ guts = case deprecs of
+ DeprecAll txt -> ptext txt
+ DeprecSome env -> pp_deprecs env
+
+pp_deprecs env = vcat (punctuate semi (map pp_deprec (nameEnvElts env)))
+ where
+ pp_deprec (name, txt) = pprOccName (nameOccName name) <+> ptext txt
+\end{code}
projects / ghc-hetmet.git / blobdiff