Representing modules and their flavours.
+
+Notes on DLLs
+~~~~~~~~~~~~~
+When compiling module A, which imports module B, we need to
+know whether B will be in the same DLL as A.
+ If it's in the same DLL, we refer to B_f_closure
+ If it isn't, we refer to _imp__B_f_closure
+When compiling A, we record in B's Module value whether it's
+in a different DLL, by setting the DLL flag.
+
+
+
+
\begin{code}
module Module
(
- Module -- abstract, instance of Eq, Ord, Outputable
- , moduleString -- :: Module -> EncodedString
- , moduleUserString -- :: Module -> UserString
- , moduleIfaceFlavour -- :: Module -> IfaceFlavour
- , moduleFS -- :: Module -> EncodedFS
+ Module, moduleName, packageOfModule,
+ -- abstract, instance of Eq, Ord, Outputable
+ , ModuleName
+ , isModuleInThisPackage, mkModuleInThisPackage,
+ , printModulePrefix
+
+ , moduleNameString -- :: ModuleName -> EncodedString
+ , moduleNameUserString -- :: ModuleName -> UserString
+ , moduleNameFS -- :: ModuleName -> EncodedFS
- , mkBootModule -- :: Module -> Module
- , setModuleFlavour -- :: IfaceFlavour -> Module -> Module
+ , moduleString -- :: Module -> EncodedString
+ , moduleUserString -- :: Module -> UserString
- , mkDynamicModule -- :: Module -> Module
- , isDynamicModule -- :: Module -> Bool
+ , mkVanillaModule -- :: ModuleName -> Module
+ , mkPrelModule -- :: UserString -> Module
+ , mkModule -- :: ModuleName -> PackageName -> Module
+ , mkHomeModule -- :: ModuleName -> Module
- , mkSrcModule
- , mkPrelModule -- :: UserString -> Module
+-- , mkSrcModule
- , mkSrcModuleFS -- :: UserFS -> Module
- , mkSysModuleFS -- :: EncodedFS -> IfaceFlavour -> Module
- , mkImportModuleFS -- :: UserFS -> IfaceFlavour -> Module
+ , mkModuleName -- :: UserString -> ModuleName
+ , mkModuleNameFS -- :: UserFS -> ModuleName
+ , mkSysModuleNameFS -- :: EncodedFS -> ModuleName
- , pprModule
- , pprModuleSep
- , pprModuleBoot
+ , pprModule,
- -- IfaceFlavour
- , IfaceFlavour
- , hiFile
- , hiBootFile -- :: IfaceFlavour
- , mkDynFlavour -- :: Bool -> IfaceFlavour -> IfaceFlavour
+ , PackageName
+
+ -- Where to find a .hi file
+ , WhereFrom(..)
- , bootFlavour -- :: IfaceFlavour -> Bool
+ , ModuleEnv,
+ , elemModuleEnv, extendModuleEnv, extendModuleEnvList, plusModuleEnv_C
+ , delModuleEnvList, delModuleEnv, plusModuleEnv, lookupModuleEnv
+ , lookupWithDefaultModuleEnv, mapModuleEnv, mkModuleEnv, emptyModuleEnv
+ , moduleEnvElts, unitModuleEnv, isEmptyModuleEnv, foldModuleEnv
+ , lookupModuleEnvByName, extendModuleEnv_C
+
+ , ModuleSet, emptyModuleSet, mkModuleSet, moduleSetElts, extendModuleSet, elemModuleSet
) where
#include "HsVersions.h"
import OccName
import Outputable
-import CmdLineOpts ( opt_Static, opt_CompilingPrelude )
-
+import CmdLineOpts ( opt_InPackage )
+import FastString ( FastString, uniqueOfFS )
+import Unique ( Uniquable(..), mkUniqueGrimily )
+import UniqFM
+import UniqSet
\end{code}
%* *
%************************************************************************
-The IfaceFlavour type is used mainly in an imported Name's Provenance
-to say whether the name comes from a regular .hi file, or whether it comes
-from a hand-written .hi-boot file. This is important, because it has to be
-propagated. Suppose
-
- C.hs imports B
- B.hs imports A
- A.hs imports C {-# SOURCE -#} ( f )
-
-Then in A.hi we may mention C.f, in an inlining. When compiling B we *must not*
-read C.f's details from C.hi, even if the latter happens to exist from an earlier
-compilation run. So we use the name "C!f" in A.hi, and when looking for an interface
-file with details of C!f we look in C.hi-boot. The "!" stuff is recorded in the
-IfaceFlavour in the Module of C.f in A.
-
-Not particularly beautiful, but it works.
-
-A further twist to the tale is the support for dynamically linked libraries under
-Win32. Here, dealing with the use of global variables that's residing in a DLL
-requires special handling at the point of use (there's an extra level of indirection,
-i.e., (**v) to get at v's value, rather than just (*v) .) When slurping in an
-interface file we then record whether it's coming from a .hi corresponding to a
-module that's packaged up in a DLL or not, so that we later can emit the
+A further twist to the tale is the support for dynamically linked
+libraries under Win32. Here, dealing with the use of global variables
+that's residing in a DLL requires special handling at the point of use
+(there's an extra level of indirection, i.e., (**v) to get at v's
+value, rather than just (*v) .) When slurping in an interface file we
+then record whether it's coming from a .hi corresponding to a module
+that's packaged up in a DLL or not, so that we later can emit the
appropriate code.
-The logic for how an interface file is marked as corresponding to a module that's
-hiding in a DLL is explained elsewhere (ToDo: give renamer href here.)
+The logic for how an interface file is marked as corresponding to a
+module that's hiding in a DLL is explained elsewhere (ToDo: give
+renamer href here.)
+
+\begin{code}
+data Module = Module ModuleName PackageInfo
+
+data PackageInfo
+ = ThisPackage -- A module from the same package
+ -- as the one being compiled
+ | AnotherPackage PackageName -- A module from a different package
+
+ | DunnoYet -- This is used when we don't yet know
+ -- Main case: we've come across Foo.x in an interface file
+ -- but we havn't yet opened Foo.hi. We need a Name for Foo.x
+ -- Later on (in RnEnv.newTopBinder) we'll update the cache
+ -- to have the right PackageInfo
+
+type PackageName = FastString -- No encoding at all
+
+preludePackage :: PackageName
+preludePackage = SLIT("std")
+
+instance Outputable PackageInfo where
+ -- Just used in debug prints of lex tokens and in debug modde
+ ppr ThisPackage = ptext SLIT("<THIS>")
+ ppr DunnoYet = ptext SLIT("<?>")
+ ppr (AnotherPackage p) = ptext p
+\end{code}
+
+
+%************************************************************************
+%* *
+\subsection{Where from}
+%* *
+%************************************************************************
+
+The @WhereFrom@ type controls where the renamer looks for an interface file
\begin{code}
-data IfaceFlavour = HiFile -- The thing comes from a standard interface file
- -- or from the source file itself
- | HiBootFile -- ... or from a handwritten "hi-boot" interface file
-
- | HiDllFile -- The thing comes from a standard interface file, but
- -- it's corresponding object code is residing in a DLL.
- -- (see above.)
- deriving( Eq )
-
-hiFile = HiFile
-hiDllFile = HiDllFile
-hiBootFile = HiBootFile
-
--- badly named, isn't clear whether the boolean deals with
--- the 'bootedness' or the 'DLLedness'. ToDo: improve.
-mkDynFlavour :: Bool{-is really dyn?-} -> IfaceFlavour -> IfaceFlavour
-mkDynFlavour True HiFile = HiDllFile
-mkDynFlavour _ x = x
-
-instance Text IfaceFlavour where -- Just used in debug prints of lex tokens
- showsPrec n HiBootFile s = "!" ++ s
- showsPrec n HiFile s = s
- showsPrec n HiDllFile s = s
-
-bootFlavour :: IfaceFlavour -> Bool
-bootFlavour HiBootFile = True
-bootFlavour HiFile = False
-bootFlavour HiDllFile = False
+data WhereFrom = ImportByUser -- Ordinary user import: look for M.hi
+ | ImportByUserSource -- User {- SOURCE -}: look for M.hi-boot
+ | ImportBySystem -- Non user import. Look for M.hi if M is in
+ -- the module this module depends on, or is a system-ish module;
+ -- M.hi-boot otherwise
+
+instance Outputable WhereFrom where
+ ppr ImportByUser = empty
+ ppr ImportByUserSource = ptext SLIT("{- SOURCE -}")
+ ppr ImportBySystem = ptext SLIT("{- SYSTEM IMPORT -}")
\end{code}
%************************************************************************
%* *
-\subsection[Module]{The name of a module}
+\subsection{The name of a module}
%* *
%************************************************************************
\begin{code}
-data Module = Module
- EncodedFS
- IfaceFlavour
+newtype ModuleName = ModuleName EncodedFS
-- Haskell module names can include the quote character ',
-- so the module names have the z-encoding applied to them
+
+instance Uniquable ModuleName where
+ getUnique (ModuleName nm) = mkUniqueGrimily (uniqueOfFS nm)
+
+instance Eq ModuleName where
+ nm1 == nm2 = getUnique nm1 == getUnique nm2
+
+-- Warning: gives an ordering relation based on the uniques of the
+-- FastStrings which are the (encoded) module names. This is _not_
+-- a lexicographical ordering.
+instance Ord ModuleName where
+ nm1 `compare` nm2 = getUnique nm1 `compare` getUnique nm2
+
+instance Outputable ModuleName where
+ ppr = pprModuleName
+
+
+pprModuleName :: ModuleName -> SDoc
+pprModuleName (ModuleName nm) = pprEncodedFS nm
+
+moduleNameFS :: ModuleName -> EncodedFS
+moduleNameFS (ModuleName mod) = mod
+
+moduleNameString :: ModuleName -> EncodedString
+moduleNameString (ModuleName mod) = _UNPK_ mod
+
+moduleNameUserString :: ModuleName -> UserString
+moduleNameUserString (ModuleName mod) = decode (_UNPK_ mod)
+
+-- used to be called mkSrcModule
+mkModuleName :: UserString -> ModuleName
+mkModuleName s = ModuleName (_PK_ (encode s))
+
+-- used to be called mkSrcModuleFS
+mkModuleNameFS :: UserFS -> ModuleName
+mkModuleNameFS s = ModuleName (encodeFS s)
+
+-- used to be called mkSysModuleFS
+mkSysModuleNameFS :: EncodedFS -> ModuleName
+mkSysModuleNameFS s = ModuleName s
+
+-- Make a module in this package
+mkModuleInThisPackage :: ModuleName -> Module
+mkModuleInThisPackage nm = Module nm ThisPackage
\end{code}
\begin{code}
instance Outputable Module where
ppr = pprModule
--- Ignore the IfaceFlavour when comparing modules
+instance Uniquable Module where
+ getUnique (Module nm _) = getUnique nm
+
+-- Same if they have the same name.
instance Eq Module where
- (Module m1 _) == (Module m2 _) = m1 == m2
+ m1 == m2 = getUnique m1 == getUnique m2
+-- Warning: gives an ordering relation based on the uniques of the
+-- FastStrings which are the (encoded) module names. This is _not_
+-- a lexicographical ordering.
instance Ord Module where
- (Module m1 _) `compare` (Module m2 _) = m1 `compare` m2
+ m1 `compare` m2 = getUnique m1 `compare` getUnique m2
\end{code}
\begin{code}
pprModule :: Module -> SDoc
-pprModule (Module mod _) = pprEncodedFS mod
-
-pprModuleSep, pprModuleBoot :: Module -> SDoc
-pprModuleSep (Module mod HiFile) = dot
-pprModuleSep (Module mod HiDllFile) = dot
-pprModuleSep (Module mod HiBootFile) = char '!'
-
-pprModuleBoot (Module mod HiFile) = empty
-pprModuleBoot (Module mod HiDllFile) = empty
-pprModuleBoot (Module mod HiBootFile) = char '!'
+pprModule (Module mod p) = getPprStyle $ \ sty ->
+ if debugStyle sty then
+ -- Print the package too
+ ppr p <> dot <> pprModuleName mod
+ else
+ pprModuleName mod
\end{code}
\begin{code}
-mkSrcModule :: UserString -> Module
-mkSrcModule s = Module (_PK_ (encode s)) HiFile
-
-mkPrelModule :: UserString -> Module
-mkPrelModule s = Module (_PK_ (encode s)) ilk
- where
- ilk
- | opt_Static || opt_CompilingPrelude = HiFile
- | otherwise = HiDllFile
-
-mkSrcModuleFS :: UserFS -> Module
-mkSrcModuleFS s = Module (encodeFS s) HiFile
+mkModule :: ModuleName -- Name of the module
+ -> PackageName
+ -> Module
+mkModule mod_nm pack_name
+ = Module mod_nm pack_info
+ where
+ pack_info | pack_name == opt_InPackage = ThisPackage
+ | otherwise = AnotherPackage pack_name
+
+mkHomeModule :: ModuleName -> Module
+mkHomeModule mod_nm = Module mod_nm ThisPackage
+
+-- Used temporarily when we first come across Foo.x in an interface
+-- file, but before we've opened Foo.hi.
+-- (Until we've opened Foo.hi we don't know what the PackageInfo is.)
+mkVanillaModule :: ModuleName -> Module
+mkVanillaModule name = Module name DunnoYet
+
+mkPrelModule :: ModuleName -> Module
+mkPrelModule name = mkModule name preludePackage
-mkImportModuleFS :: UserFS -> IfaceFlavour -> Module
-mkImportModuleFS s hif = Module (encodeFS s) hif
+moduleString :: Module -> EncodedString
+moduleString (Module (ModuleName fs) _) = _UNPK_ fs
-mkSysModuleFS :: EncodedFS -> IfaceFlavour -> Module
-mkSysModuleFS s hif = Module s hif
+moduleName :: Module -> ModuleName
+moduleName (Module mod pkg_info) = mod
-mkBootModule :: Module -> Module
-mkBootModule (Module s _) = Module s HiBootFile
+moduleUserString :: Module -> UserString
+moduleUserString (Module mod _) = moduleNameUserString mod
-mkDynamicModule :: Module -> Module
-mkDynamicModule (Module s HiFile) = Module s HiDllFile
-mkDynamicModule m = m
+isModuleInThisPackage :: Module -> Bool
+isModuleInThisPackage (Module nm ThisPackage) = True
+isModuleInThisPackage _ = False
-setModuleFlavour :: IfaceFlavour -> Module -> Module
-setModuleFlavour hif (Module n _) = Module n hif
+packageOfModule :: Module -> Maybe PackageName
+packageOfModule (Module nm (AnotherPackage pn)) = Just pn
+packageOfModule _ = Nothing
-moduleString :: Module -> EncodedString
-moduleString (Module mod _) = _UNPK_ mod
+printModulePrefix :: Module -> Bool
+ -- When printing, say M.x
+printModulePrefix (Module nm ThisPackage) = False
+printModulePrefix _ = True
+\end{code}
-moduleFS :: Module -> EncodedFS
-moduleFS (Module mod _) = mod
-moduleUserString :: Module -> UserString
-moduleUserString (Module mod _) = decode (_UNPK_ mod)
+%************************************************************************
+%* *
+\subsection{@ModuleEnv@s}
+%* *
+%************************************************************************
-moduleIfaceFlavour :: Module -> IfaceFlavour
-moduleIfaceFlavour (Module _ hif) = hif
+\begin{code}
+type ModuleEnv elt = UniqFM elt
+
+emptyModuleEnv :: ModuleEnv a
+mkModuleEnv :: [(Module, a)] -> ModuleEnv a
+unitModuleEnv :: Module -> a -> ModuleEnv a
+extendModuleEnv :: ModuleEnv a -> Module -> a -> ModuleEnv a
+extendModuleEnv_C :: (a->a->a) -> ModuleEnv a -> Module -> a -> ModuleEnv a
+plusModuleEnv :: ModuleEnv a -> ModuleEnv a -> ModuleEnv a
+extendModuleEnvList :: ModuleEnv a -> [(Module, a)] -> ModuleEnv a
+
+delModuleEnvList :: ModuleEnv a -> [Module] -> ModuleEnv a
+delModuleEnv :: ModuleEnv a -> Module -> ModuleEnv a
+plusModuleEnv_C :: (a -> a -> a) -> ModuleEnv a -> ModuleEnv a -> ModuleEnv a
+mapModuleEnv :: (a -> b) -> ModuleEnv a -> ModuleEnv b
+moduleEnvElts :: ModuleEnv a -> [a]
+
+isEmptyModuleEnv :: ModuleEnv a -> Bool
+lookupModuleEnv :: ModuleEnv a -> Module -> Maybe a
+lookupModuleEnvByName:: ModuleEnv a -> ModuleName -> Maybe a
+lookupWithDefaultModuleEnv :: ModuleEnv a -> a -> Module -> a
+elemModuleEnv :: Module -> ModuleEnv a -> Bool
+foldModuleEnv :: (a -> b -> b) -> b -> ModuleEnv a -> b
+
+elemModuleEnv = elemUFM
+extendModuleEnv = addToUFM
+extendModuleEnv_C = addToUFM_C
+extendModuleEnvList = addListToUFM
+plusModuleEnv_C = plusUFM_C
+delModuleEnvList = delListFromUFM
+delModuleEnv = delFromUFM
+plusModuleEnv = plusUFM
+lookupModuleEnv = lookupUFM
+lookupModuleEnvByName = lookupUFM
+lookupWithDefaultModuleEnv = lookupWithDefaultUFM
+mapModuleEnv = mapUFM
+mkModuleEnv = listToUFM
+emptyModuleEnv = emptyUFM
+moduleEnvElts = eltsUFM
+unitModuleEnv = unitUFM
+isEmptyModuleEnv = isNullUFM
+foldModuleEnv = foldUFM
\end{code}
\begin{code}
-isDynamicModule :: Module -> Bool
-isDynamicModule (Module _ HiDllFile) = True
-isDynamicModule _ = False
+
+type ModuleSet = UniqSet Module
+mkModuleSet :: [Module] -> ModuleSet
+extendModuleSet :: ModuleSet -> Module -> ModuleSet
+emptyModuleSet :: ModuleSet
+moduleSetElts :: ModuleSet -> [Module]
+elemModuleSet :: Module -> ModuleSet -> Bool
+
+emptyModuleSet = emptyUniqSet
+mkModuleSet = mkUniqSet
+extendModuleSet = addOneToUniqSet
+moduleSetElts = uniqSetToList
+elemModuleSet = elementOfUniqSet
\end{code}
projects / ghc-hetmet.git / blobdiff