%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
+% (c) The University of Glasgow, 2004
%
-\section[Module]{The @Module@ module.}
-
-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.
-
-
+Module
+~~~~~~~~~~
+Simply the name of a module, represented as a FastString.
+These are Uniquable, hence we can build FiniteMaps with ModuleNames as
+the keys.
\begin{code}
module Module
(
- Module -- abstract, instance of Eq, Ord, Outputable
- , ModuleName
-
- , moduleNameString -- :: ModuleName -> EncodedString
- , moduleNameUserString -- :: ModuleName -> UserString
+ Module -- Abstract, instance of Eq, Ord, Outputable
+ , pprModule -- :: ModuleName -> SDoc
- , moduleString -- :: Module -> EncodedString
- , moduleUserString -- :: Module -> UserString
- , moduleName -- :: Module -> ModuleName
+ , ModLocation(..)
+ , addBootSuffix, addBootSuffix_maybe, addBootSuffixLocn
- , mkVanillaModule -- :: ModuleName -> Module
- , mkThisModule -- :: ModuleName -> Module
- , mkPrelModule -- :: UserString -> Module
- , mkModule -- :: ModuleName -> PackageName -> Module
-
- , isLocalModule -- :: Module -> Bool
+ , moduleString -- :: ModuleName -> String
+ , moduleFS -- :: ModuleName -> FastString
- , mkSrcModule
-
- , mkSrcModuleFS -- :: UserFS -> ModuleName
- , mkSysModuleFS -- :: EncodedFS -> ModuleName
-
- , pprModule, pprModuleName
+ , mkModule -- :: String -> ModuleName
+ , mkModuleFS -- :: FastString -> ModuleName
- , PackageName
+ , ModuleEnv
+ , elemModuleEnv, extendModuleEnv, extendModuleEnvList, plusModuleEnv_C
+ , delModuleEnvList, delModuleEnv, plusModuleEnv, lookupModuleEnv
+ , lookupWithDefaultModuleEnv, mapModuleEnv, mkModuleEnv, emptyModuleEnv
+ , moduleEnvElts, unitModuleEnv, isEmptyModuleEnv, foldModuleEnv
+ , extendModuleEnv_C, filterModuleEnv
- -- Where to find a .hi file
- , WhereFrom(..)
+ , ModuleSet, emptyModuleSet, mkModuleSet, moduleSetElts, extendModuleSet, elemModuleSet
) where
#include "HsVersions.h"
import OccName
import Outputable
-import CmdLineOpts ( opt_InPackage )
-import FastString ( FastString )
+import Unique ( Uniquable(..) )
+import UniqFM
+import UniqSet
+import Binary
+import FastString
\end{code}
-
%************************************************************************
%* *
-\subsection{Interface file flavour}
+\subsection{Module locations}
%* *
%************************************************************************
-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.)
-
\begin{code}
-data PackageInfo = ThisPackage -- A module from the same package
- -- as the one being compiled
- | AnotherPackage PackageName -- A module from a different package
-
-type PackageName = FastString -- No encoding at all
-
-preludePackage :: PackageName
-preludePackage = SLIT("std")
-
-instance Show PackageInfo where -- Just used in debug prints of lex tokens
- -- and in debug modde
- showsPrec n ThisPackage s = "<THIS>" ++ s
- showsPrec n (AnotherPackage p) s = (_UNPK_ p) ++ s
+data ModLocation
+ = ModLocation {
+ ml_hs_file :: Maybe FilePath,
+ -- The source file, if we have one. Package modules
+ -- probably don't have source files.
+
+ ml_hi_file :: FilePath,
+ -- Where the .hi file is, whether or not it exists
+ -- yet. Always of form foo.hi, even if there is an
+ -- hi-boot file (we add the -boot suffix later)
+
+ ml_obj_file :: FilePath
+ -- Where the .o file is, whether or not it exists yet.
+ -- (might not exist either because the module hasn't
+ -- been compiled yet, or because it is part of a
+ -- package with a .a file)
+ } deriving Show
+
+instance Outputable ModLocation where
+ ppr = text . show
\end{code}
+For a module in another package, the hs_file and obj_file
+components of ModLocation are undefined.
-%************************************************************************
-%* *
-\subsection{Where from}
-%* *
-%************************************************************************
-
-The @WhereFrom@ type controls where the renamer looks for an interface file
+The locations specified by a ModLocation may or may not
+correspond to actual files yet: for example, even if the object
+file doesn't exist, the ModLocation still contains the path to
+where the object file will reside if/when it is created.
\begin{code}
-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 -}")
+addBootSuffix :: FilePath -> FilePath
+-- Add the "-boot" suffix to .hs, .hi and .o files
+addBootSuffix path = path ++ "-boot"
+
+addBootSuffix_maybe :: Bool -> FilePath -> FilePath
+addBootSuffix_maybe is_boot path
+ | is_boot = addBootSuffix path
+ | otherwise = path
+
+addBootSuffixLocn :: ModLocation -> ModLocation
+addBootSuffixLocn locn
+ = locn { ml_hs_file = fmap addBootSuffix (ml_hs_file locn)
+ , ml_hi_file = addBootSuffix (ml_hi_file locn)
+ , ml_obj_file = addBootSuffix (ml_obj_file locn) }
\end{code}
%************************************************************************
\begin{code}
-type ModuleName = EncodedFS
+newtype Module = Module FastString
-- Haskell module names can include the quote character ',
-- so the module names have the z-encoding applied to them
-pprModuleName :: ModuleName -> SDoc
-pprModuleName nm = pprEncodedFS nm
-
-moduleNameString :: ModuleName -> EncodedString
-moduleNameString mod = _UNPK_ mod
-
-moduleNameUserString :: ModuleName -> UserString
-moduleNameUserString mod = decode (_UNPK_ mod)
-
-mkSrcModule :: UserString -> ModuleName
-mkSrcModule s = _PK_ (encode s)
+instance Binary Module where
+ put_ bh (Module m) = put_ bh m
+ get bh = do m <- get bh; return (Module m)
-mkSrcModuleFS :: UserFS -> ModuleName
-mkSrcModuleFS s = encodeFS s
-
-mkSysModuleFS :: EncodedFS -> ModuleName
-mkSysModuleFS s = s
-\end{code}
-
-\begin{code}
-data Module = Module ModuleName PackageInfo
-\end{code}
-
-\begin{code}
-instance Outputable Module where
- ppr = pprModule
+instance Uniquable Module where
+ getUnique (Module nm) = getUnique nm
instance Eq Module where
- (Module m1 _) == (Module m2 _) = m1 == m2
+ 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 Module where
- (Module m1 _) `compare` (Module m2 _) = m1 `compare` m2
-\end{code}
+ nm1 `compare` nm2 = getUnique nm1 `compare` getUnique nm2
+instance Outputable Module where
+ ppr = pprModule
-\begin{code}
pprModule :: Module -> SDoc
-pprModule (Module mod p) = getPprStyle $ \ sty ->
- if debugStyle sty then
- -- Print the package too
- text (show p) <> dot <> pprModuleName mod
- else
- pprModuleName mod
-\end{code}
-
-
-\begin{code}
-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
+pprModule (Module nm) =
+ getPprStyle $ \ sty ->
+ if codeStyle sty
+ then ftext (zEncodeFS nm)
+ else ftext nm
+moduleFS :: Module -> FastString
+moduleFS (Module mod) = mod
-mkVanillaModule :: ModuleName -> Module
-mkVanillaModule name = Module name 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.)
+moduleString :: Module -> String
+moduleString (Module mod) = unpackFS mod
-mkThisModule :: ModuleName -> Module -- The module being compiled
-mkThisModule name = Module name ThisPackage
+-- used to be called mkSrcModule
+mkModule :: String -> Module
+mkModule s = Module (mkFastString s)
-mkPrelModule :: ModuleName -> Module
-mkPrelModule name = mkModule name preludePackage
-
-moduleString :: Module -> EncodedString
-moduleString (Module mod _) = _UNPK_ mod
+-- used to be called mkSrcModuleFS
+mkModuleFS :: FastString -> Module
+mkModuleFS s = Module s
+\end{code}
-moduleName :: Module -> ModuleName
-moduleName (Module mod _) = mod
+%************************************************************************
+%* *
+\subsection{@ModuleEnv@s}
+%* *
+%************************************************************************
-moduleUserString :: Module -> UserString
-moduleUserString (Module mod _) = moduleNameUserString mod
+\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
+lookupWithDefaultModuleEnv :: ModuleEnv a -> a -> Module -> a
+elemModuleEnv :: Module -> ModuleEnv a -> Bool
+foldModuleEnv :: (a -> b -> b) -> b -> ModuleEnv a -> b
+filterModuleEnv :: (a -> Bool) -> ModuleEnv a -> ModuleEnv a
+
+filterModuleEnv = filterUFM
+elemModuleEnv = elemUFM
+extendModuleEnv = addToUFM
+extendModuleEnv_C = addToUFM_C
+extendModuleEnvList = addListToUFM
+plusModuleEnv_C = plusUFM_C
+delModuleEnvList = delListFromUFM
+delModuleEnv = delFromUFM
+plusModuleEnv = plusUFM
+lookupModuleEnv = lookupUFM
+lookupWithDefaultModuleEnv = lookupWithDefaultUFM
+mapModuleEnv = mapUFM
+mkModuleEnv = listToUFM
+emptyModuleEnv = emptyUFM
+moduleEnvElts = eltsUFM
+unitModuleEnv = unitUFM
+isEmptyModuleEnv = isNullUFM
+foldModuleEnv = foldUFM
\end{code}
\begin{code}
-isLocalModule :: Module -> Bool
-isLocalModule (Module _ ThisPackage) = True
-isLocalModule _ = 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