VersionInfo(..), initialVersionInfo, lookupVersion,
FixityEnv, lookupFixity, collectFixities, emptyFixityEnv,
- TyThing(..), isTyClThing, implicitTyThingIds,
+ TyThing(..), implicitTyThings,
TypeEnv, lookupType, mkTypeEnv, emptyTypeEnv,
extendTypeEnvList, extendTypeEnvWithIds,
typeEnvElts, typeEnvClasses, typeEnvTyCons, typeEnvIds,
- ImportedModuleInfo, WhetherHasOrphans, ImportVersion, WhatsImported(..),
- IsBootInterface, DeclsMap,
+ WhetherHasOrphans, IsBootInterface, DeclsMap, Usage(..),
+ Dependencies(..), noDependencies,
IfaceInsts, IfaceRules, GatedDecl, GatedDecls, GateFn,
NameCache(..), OrigNameCache, OrigIParamCache,
Avails, availsToNameSet, availName, availNames,
import InstEnv ( InstEnv, ClsInstEnv, DFunId )
import Rules ( RuleBase )
import CoreSyn ( CoreBind )
-import Id ( Id )
-import Class ( Class, classSelIds )
-import TyCon ( TyCon, isNewTyCon, tyConGenIds, tyConSelIds, tyConDataCons_maybe )
-import Type ( TyThing(..), isTyClThing )
-import DataCon ( dataConWorkId, dataConWrapId )
-import Packages ( PackageName, preludePackage )
+import Id ( Id, idName )
+import Class ( Class, classSelIds, classTyCon )
+import TyCon ( TyCon, tyConName, isNewTyCon, tyConGenIds, tyConSelIds, tyConDataCons )
+import TcType ( TyThing(..) )
+import DataCon ( dataConWorkId, dataConWrapId, dataConWrapId_maybe )
+import Packages ( PackageName, basePackage )
import CmdLineOpts ( DynFlags )
import BasicTypes ( Version, initialVersion, IPName,
Fixity, FixitySig(..), defaultFixity )
-import HsSyn ( DeprecTxt, TyClDecl, InstDecl, RuleDecl,
- tyClDeclName, ifaceRuleDeclName, tyClDeclNames )
+import HsSyn ( DeprecTxt, TyClDecl, InstDecl, RuleDecl,
+ tyClDeclName, ifaceRuleDeclName, tyClDeclNames,
+ instDeclDFun )
import RnHsSyn ( RenamedTyClDecl, RenamedRuleDecl, RenamedInstDecl )
import CoreSyn ( IdCoreRule )
Simple lookups in the symbol table.
\begin{code}
-lookupIface :: HomePackageTable -> PackageIfaceTable -> Name -> Maybe ModIface
+lookupIface :: HomePackageTable -> PackageIfaceTable -> Module -> Maybe ModIface
-- We often have two IfaceTables, and want to do a lookup
-lookupIface hpt pit name
+lookupIface hpt pit mod
= case lookupModuleEnv hpt mod of
Just mod_info -> Just (hm_iface mod_info)
Nothing -> lookupModuleEnv pit mod
- where
- mod = nameModule name
lookupIfaceByModName :: HomePackageTable -> PackageIfaceTable -> ModuleName -> Maybe ModIface
-- We often have two IfaceTables, and want to do a lookup
= ModIface {
mi_module :: !Module,
mi_package :: !PackageName, -- Which package the module comes from
- mi_version :: !VersionInfo, -- Module version number
+ mi_version :: !VersionInfo, -- Version info for everything in this module
mi_orphan :: !WhetherHasOrphans, -- Whether this module has orphans
mi_boot :: !IsBootInterface, -- Read from an hi-boot file?
- mi_usages :: [ImportVersion Name],
+ mi_deps :: Dependencies,
+ -- This is consulted for directly-imported modules, but
+ -- not for anything else
+
+ mi_usages :: [Usage Name],
-- Usages; kept sorted so that it's easy to decide
-- whether to write a new iface file (changing usages
-- doesn't affect the version of this module)
-- NOT STRICT! we read this field lazily from the interface file
+ -- It is *only* consulted by the recompilation checker
mi_exports :: ![ExportItem],
-- What it exports Kept sorted by (mod,occ), to make
md_rules :: ![IdCoreRule] -- Domain may include Ids from other modules
}
-
-
-- A ModGuts is carried through the compiler, accumulating stuff as it goes
-- There is only one ModGuts at any time, the one for the module
-- being compiled right now. Once it is compiled, a ModIface and
data ModGuts
= ModGuts {
mg_module :: !Module,
- mg_exports :: !Avails, -- What it exports
- mg_usages :: ![ImportVersion Name], -- What it imports, directly or otherwise
- -- ...exactly as in ModIface
- mg_dir_imps :: ![Module], -- Directly imported modules
+ mg_exports :: !Avails, -- What it exports
+ mg_deps :: !Dependencies, -- What is below it, directly or otherwise
+ mg_dir_imps :: ![Module], -- Directly-imported modules; used to
+ -- generate initialisation code
+ mg_usages :: ![Usage Name], -- Version info for what it needed
mg_rdr_env :: !GlobalRdrEnv, -- Top-level lexical environment
mg_fix_env :: !FixityEnv, -- Fixity env, for things declared in this module
dcl_insts :: [RenamedInstDecl] } -- Unsorted
mkIfaceDecls :: [RenamedTyClDecl] -> [RenamedRuleDecl] -> [RenamedInstDecl] -> IfaceDecls
+-- Sort to put them in canonical order for version comparison
mkIfaceDecls tycls rules insts
= IfaceDecls { dcl_tycl = sortLt lt_tycl tycls,
dcl_rules = sortLt lt_rule rules,
- dcl_insts = insts }
+ dcl_insts = sortLt lt_inst insts }
where
d1 `lt_tycl` d2 = tyClDeclName d1 < tyClDeclName d2
r1 `lt_rule` r2 = ifaceRuleDeclName r1 < ifaceRuleDeclName r2
+ i1 `lt_inst` i2 = instDeclDFun i1 < instDeclDFun i2
\end{code}
\begin{code}
emptyModIface :: Module -> ModIface
emptyModIface mod
= ModIface { mi_module = mod,
- mi_package = preludePackage, -- XXX fully bogus
+ mi_package = basePackage, -- XXX fully bogus
mi_version = initialVersionInfo,
mi_usages = [],
+ mi_deps = noDependencies,
mi_orphan = False,
mi_boot = False,
mi_exports = [],
pi_pkg :: PackageName,
pi_vers :: Version, -- Module version number
pi_orphan :: WhetherHasOrphans, -- Whether this module has orphans
- pi_usages :: [ImportVersion OccName], -- Usages
+ pi_deps :: Dependencies, -- What it depends on
+ pi_usages :: [Usage OccName], -- Usages
pi_exports :: (Version, [RdrExportItem]), -- Exports
pi_decls :: [(Version, TyClDecl RdrName)], -- Local definitions
pi_fixity :: [FixitySig RdrName], -- Local fixity declarations,
typeEnvClasses env = [cl | AClass cl <- typeEnvElts env]
typeEnvTyCons env = [tc | ATyCon tc <- typeEnvElts env]
typeEnvIds env = [id | AnId id <- typeEnvElts env]
-
-implicitTyThingIds :: [TyThing] -> [Id]
--- Add the implicit data cons and selectors etc
-implicitTyThingIds things
- = concat (map go things)
- where
- go (AnId f) = []
- go (AClass cl) = classSelIds cl
- go (ATyCon tc) = tyConGenIds tc ++
- tyConSelIds tc ++
- [ n | dc <- tyConDataCons_maybe tc `orElse` [],
- n <- implicitConIds tc dc]
- -- Synonyms return empty list of constructors and selectors
-
- implicitConIds tc dc -- Newtypes have a constructor wrapper,
- -- but no worker
- | isNewTyCon tc = [dataConWrapId dc]
- | otherwise = [dataConWorkId dc, dataConWrapId dc]
\end{code}
mkTypeEnv things = extendTypeEnvList emptyTypeEnv things
extendTypeEnvList :: TypeEnv -> [TyThing] -> TypeEnv
+-- Extend the type environment
extendTypeEnvList env things
- = extendNameEnvList env [(getName thing, thing) | thing <- things]
+ = foldl extend env things
+ where
+ extend env thing = extendNameEnv env (getName thing) thing
+
+implicitTyThings :: [TyThing] -> [TyThing]
+implicitTyThings things
+ = concatMap extras things
+ where
+ extras_plus thing = thing : extras thing
+
+ extras (AnId id) = []
+
+ -- For type constructors, add the data cons (and their extras),
+ -- and the selectors and generic-programming Ids too
+ --
+ -- Newtypes don't have a worker Id, so don't generate that
+ extras (ATyCon tc) = map AnId (tyConGenIds tc ++ tyConSelIds tc) ++ data_con_stuff
+ where
+ data_con_stuff | isNewTyCon tc = [ADataCon dc1, AnId (dataConWrapId dc1)]
+ | otherwise = concatMap (extras_plus . ADataCon) dcs
+ dcs = tyConDataCons tc
+ dc1 = head dcs
+
+ -- For classes, add the class TyCon too (and its extras)
+ -- and the class selector Ids
+ extras (AClass cl) = map AnId (classSelIds cl) ++
+ extras_plus (ATyCon (classTyCon cl))
+
+
+ -- For data cons add the worker and wrapper (if any)
+ extras (ADataCon dc)
+ = AnId (dataConWorkId dc) : wrap_id_stuff
+ where
+ -- May or may not have a wrapper
+ wrap_id_stuff = case dataConWrapId_maybe dc of
+ Just id -> [AnId id]
+ Nothing -> []
extendTypeEnvWithIds :: TypeEnv -> [Id] -> TypeEnv
extendTypeEnvWithIds env ids
-- * a transformation rule in a module other than the one defining
-- the function in the head of the rule.
-type IsBootInterface = Bool
-
-type ImportVersion name = (ModuleName, WhetherHasOrphans, IsBootInterface, WhatsImported name)
-
-data WhatsImported name = NothingAtAll -- The module is below us in the
- -- hierarchy, but we import nothing
- -- Used for orphan modules, so they appear
- -- in the usage list
+type IsBootInterface = Bool
- | Everything Version -- Used for modules from other packages;
- -- we record only the module's version number
-
- | Specifically
- Version -- Module version
- (Maybe Version) -- Export-list version, if we depend on it
- [(name,Version)] -- List guaranteed non-empty
- Version -- Rules version
-
- deriving( Eq )
- -- 'Specifically' doesn't let you say "I imported f but none of the rules in
+-- Dependency info about modules and packages below this one
+-- in the import hierarchy. See TcRnTypes.ImportAvails for details.
+--
+-- Invariant: the dependencies of a module M never includes M
+data Dependencies
+ = Deps { dep_mods :: [(ModuleName,IsBootInterface)], -- Home-package module dependencies
+ dep_pkgs :: [PackageName], -- External package dependencies
+ dep_orphs :: [ModuleName] } -- Orphan modules (whether home or external pkg)
+
+noDependencies :: Dependencies
+noDependencies = Deps [] [] []
+
+data Usage name
+ = Usage { usg_name :: ModuleName, -- Name of the module
+ usg_mod :: Version, -- Module version
+ usg_exports :: Maybe Version, -- Export-list version, if we depend on it
+ usg_entities :: [(name,Version)], -- Sorted by occurrence name
+ usg_rules :: Version -- Rules version
+ } deriving( Eq )
+ -- This type doesn't let you say "I imported f but none of the rules in
-- the module". If you use anything in the module you get its rule version
-- So if the rules change, you'll recompile, even if you don't use them.
-- This is easy to implement, and it's safer: you might not have used the rules last
-- time round, but if someone has added a new rule you might need it this time
-- The export list field is (Just v) if we depend on the export list:
- -- we imported the module without saying exactly what we imported
+ -- i.e. we imported the module without saying exactly what we imported
-- We need to recompile if the module exports changes, because we might
-- now have a name clash in the importing module.
\end{code}
-- * Fixities
-- * Deprecations
- eps_imp_mods :: !ImportedModuleInfo,
- -- Modules that we know something about, because they are mentioned
- -- in interface files, BUT which we have not loaded yet.
- -- No module is both in here and in the PIT
-
eps_PTE :: !PackageTypeEnv, -- Domain = external-package modules
eps_inst_env :: !PackageInstEnv, -- The total InstEnv accumulated from
-- Ensures that one implicit parameter name gets one unique
}
-type OrigNameCache = FiniteMap (ModuleName,OccName) Name
-type OrigIParamCache = FiniteMap (IPName RdrName) (IPName Name)
-\end{code}
-
-@ImportedModuleInfo@ contains info ONLY about modules that have not yet
-been loaded into the iPIT. These modules are mentioned in interfaces we've
-already read, so we know a tiny bit about them, but we havn't yet looked
-at the interface file for the module itself. It needs to persist across
-invocations of the renamer, at least from Rename.checkOldIface to Rename.renameSource.
-And there's no harm in it persisting across multiple compilations.
+type OrigNameCache = ModuleEnv (Module, OccNameCache)
+ -- Maps a module *name* to a Module,
+ -- plus the OccNameEnv fot that module
+type OccNameCache = FiniteMap OccName Name
+ -- Maps the OccName to a Name
+ -- A FiniteMap because OccNames have a Namespace/Faststring pair
-\begin{code}
-type ImportedModuleInfo
- = FiniteMap ModuleName (WhetherHasOrphans, IsBootInterface)
+type OrigIParamCache = FiniteMap (IPName RdrName) (IPName Name)
\end{code}
A DeclsMap contains a binding for each Name in the declaration
data GlobalRdrElt
= GRE { gre_name :: Name,
- gre_parent :: Name, -- Name of the "parent" structure
- -- * the tycon of a data con
- -- * the class of a class op
- -- For others it's just the same as gre_name
- gre_prov :: Provenance, -- Why it's in scope
- gre_deprec :: Maybe DeprecTxt -- Whether this name is deprecated
+ gre_parent :: Maybe Name, -- Name of the "parent" structure, for
+ -- * the tycon of a data con
+ -- * the class of a class op
+ -- For others it's Nothing
+ -- Invariant: gre_name g /= gre_parent g
+ -- when the latter is a Just
+
+ gre_prov :: Provenance, -- Why it's in scope
+ gre_deprec :: Maybe DeprecTxt -- Whether this name is deprecated
}
instance Outputable GlobalRdrElt where
ppr gre = ppr (gre_name gre) <+>
- parens (hsep [text "parent:" <+> ppr (gre_parent gre) <> comma,
- pprNameProvenance gre])
+ parens (pp_parent (gre_parent gre) <+> pprNameProvenance gre)
+ where
+ pp_parent (Just p) = text "parent:" <+> ppr p <> comma
+ pp_parent Nothing = empty
+
pprGlobalRdrEnv env
= vcat (map pp (rdrEnvToList env))
where
ppr_reason ImplicitImport = ptext SLIT("implicitly imported")
ppr_reason (UserImport mod loc _) = ptext SLIT("imported from") <+> ppr mod <+> ptext SLIT("at") <+> ppr loc
-ppr_defn loc | isGoodSrcLoc loc = parens (ptext SLIT("at") <+> ppr loc)
+ppr_defn loc | isGoodSrcLoc loc = parens (ptext SLIT("defined at") <+> ppr loc)
| otherwise = empty
\end{code}
projects / ghc-hetmet.git / blobdiff