-%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
-%
-\section[Module]{The @Module@ module.}
-
-Representing modules and their flavours.
-
-\begin{code}
-module Module
- (
- Module -- abstract, instance of Eq, Ord, Outputable
- , ModuleName
-
- , moduleNameString -- :: ModuleName -> EncodedString
- , moduleNameUserString -- :: ModuleName -> UserString
-
- , moduleString -- :: Module -> EncodedString
- , moduleUserString -- :: Module -> UserString
- , moduleName -- :: Module -> ModuleName
-
- , mkVanillaModule -- :: ModuleName -> Module
- , mkThisModule -- :: ModuleName -> Module
- , mkPrelModule -- :: UserString -> Module
-
- , isDynamicModule -- :: Module -> Bool
- , isLibModule
-
- , mkSrcModule
-
- , mkSrcModuleFS -- :: UserFS -> ModuleName
- , mkSysModuleFS -- :: EncodedFS -> ModuleName
-
- , pprModule, pprModuleName
-
- -- DllFlavour
- , DllFlavour, dll, notDll
-
- -- ModFlavour
- , ModFlavour, libMod, userMod
-
- -- Where to find a .hi file
- , WhereFrom(..), SearchPath, mkSearchPath
- , ModuleHiMap, mkModuleHiMaps
-
- ) where
-
-#include "HsVersions.h"
-import OccName
-import Outputable
-import FiniteMap
-import CmdLineOpts ( opt_Static, opt_CompilingPrelude, opt_WarnHiShadows )
-import Constants ( interfaceFileFormatVersion )
-import Maybes ( seqMaybe )
-import Maybe ( fromMaybe )
-import Directory ( doesFileExist )
-import DirUtils ( getDirectoryContents )
-import List ( intersperse )
-import Monad ( foldM )
-import IO ( hPutStrLn, stderr, isDoesNotExistError )
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{Interface file flavour}
-%* *
-%************************************************************************
-
-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 DllFlavour = NotDll -- Ordinary module
- | Dll -- The module's object code lives in a DLL.
- deriving( Eq )
-
-dll = Dll
-notDll = NotDll
-
-instance Text DllFlavour where -- Just used in debug prints of lex tokens
- showsPrec n NotDll s = s
- showsPrec n Dll s = "dll " ++ s
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{System/user module}
-%* *
-%************************************************************************
-
-We also track whether an imported module is from a 'system-ish' place. In this case
-we don't record the fact that this module depends on it, nor usages of things
-inside it.
-
-\begin{code}
-data ModFlavour = LibMod -- A library-ish module
- | UserMod -- Not library-ish
-
-libMod = LibMod
-userMod = UserMod
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{Where from}
-%* *
-%************************************************************************
-
-The @WhereFrom@ type controls where the renamer looks for an interface file
-
-\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 -}")
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{The name of a module}
-%* *
-%************************************************************************
-
-\begin{code}
-type ModuleName = EncodedFS
- -- 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)
-
-mkSrcModuleFS :: UserFS -> ModuleName
-mkSrcModuleFS s = encodeFS s
-
-mkSysModuleFS :: EncodedFS -> ModuleName
-mkSysModuleFS s = s
-\end{code}
-
-\begin{code}
-data Module = Module
- ModuleName
- ModFlavour
- DllFlavour
-\end{code}
-
-\begin{code}
-instance Outputable Module where
- ppr = pprModule
-
-instance Eq Module where
- (Module m1 _ _) == (Module m2 _ _) = m1 == m2
-
-instance Ord Module where
- (Module m1 _ _) `compare` (Module m2 _ _) = m1 `compare` m2
-\end{code}
-
-
-\begin{code}
-pprModule :: Module -> SDoc
-pprModule (Module mod _ _) = pprEncodedFS mod
-\end{code}
-
-
-\begin{code}
-mkModule = Module
-
-mkVanillaModule :: ModuleName -> Module
-mkVanillaModule name = Module name UserMod NotDll
-
-mkThisModule :: ModuleName -> Module -- The module being comiled
-mkThisModule name = Module name UserMod NotDll -- ToDo: correct Dll flag?
-
-mkPrelModule :: ModuleName -> Module
-mkPrelModule name = Module name sys dll
- where
- sys | opt_CompilingPrelude = UserMod
- | otherwise = LibMod
-
- dll | opt_Static || opt_CompilingPrelude = NotDll
- | otherwise = Dll
-
-moduleString :: Module -> EncodedString
-moduleString (Module mod _ _) = _UNPK_ mod
-
-moduleName :: Module -> ModuleName
-moduleName (Module mod _ _) = mod
-
-moduleUserString :: Module -> UserString
-moduleUserString (Module mod _ _) = moduleNameUserString mod
-\end{code}
-
-\begin{code}
-isDynamicModule :: Module -> Bool
-isDynamicModule (Module _ _ Dll) = True
-isDynamicModule _ = False
-
-isLibModule :: Module -> Bool
-isLibModule (Module _ LibMod _) = True
-isLibModule _ = False
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{Finding modules in the file system
-%* *
-%************************************************************************
-
-\begin{code}
-type ModuleHiMap = FiniteMap ModuleName (String, Module)
- -- Mapping from module name to
- -- * the file path of its corresponding interface file,
- -- * the Module, decorated with it's properties
-\end{code}
-
-(We allege that) it is quicker to build up a mapping from module names
-to the paths to their corresponding interface files once, than to search
-along the import part every time we slurp in a new module (which we
-do quite a lot of.)
-
-\begin{code}
-type SearchPath = [(String,String)] -- List of (directory,suffix) pairs to search
- -- for interface files.
-
-mkModuleHiMaps :: SearchPath -> IO (ModuleHiMap, ModuleHiMap)
-mkModuleHiMaps dirs = foldM (getAllFilesMatching dirs) (env,env) dirs
- where
- env = emptyFM
-
-{- A pseudo file, currently "dLL_ifs.hi",
- signals that the interface files
- contained in a particular directory have got their
- corresponding object codes stashed away in a DLL
-
- This stuff is only needed to deal with Win32 DLLs,
- and conceivably we conditionally compile in support
- for handling it. (ToDo?)
--}
-dir_contain_dll_his = "dLL_ifs.hi"
-
-getAllFilesMatching :: SearchPath
- -> (ModuleHiMap, ModuleHiMap)
- -> (FilePath, String)
- -> IO (ModuleHiMap, ModuleHiMap)
-getAllFilesMatching dirs hims (dir_path, suffix) = ( do
- -- fpaths entries do not have dir_path prepended
- fpaths <- getDirectoryContents dir_path
- is_dll <- catch
- (if opt_Static || dir_path == "." then
- return NotDll
- else
- do exists <- doesFileExist (dir_path ++ '/': dir_contain_dll_his)
- return (if exists then Dll else NotDll)
- )
- (\ _ {-don't care-} -> return NotDll)
- return (foldl (addModules is_dll) hims fpaths)
- ) -- soft failure
- `catch`
- (\ err -> do
- hPutStrLn stderr
- ("Import path element `" ++ dir_path ++
- if (isDoesNotExistError err) then
- "' does not exist, ignoring."
- else
- "' couldn't read, ignoring.")
-
- return hims
- )
- where
-
- -- Dreadfully crude. We want a better way to distinguish
- -- "library-ish" modules.
- is_sys | head dir_path == '/' = LibMod
- | otherwise = UserMod
-
- xiffus = reverse dotted_suffix
- dotted_suffix = case suffix of
- [] -> []
- ('.':xs) -> suffix
- ls -> '.':ls
-
- hi_boot_version_xiffus =
- reverse (show interfaceFileFormatVersion) ++ '-':hi_boot_xiffus
- hi_boot_xiffus = "toob-ih." -- .hi-boot reversed!
-
- addModules is_dll his@(hi_env, hib_env) filename = fromMaybe his $
- FMAP add_hi (go xiffus rev_fname) `seqMaybe`
- FMAP add_vhib (go hi_boot_version_xiffus rev_fname) `seqMaybe`
- FMAP add_hib (go hi_boot_xiffus rev_fname)
- where
- rev_fname = reverse filename
- path = dir_path ++ '/':filename
-
- mk_module mod_nm = Module mod_nm is_sys is_dll
- add_hi mod_nm = (addToFM_C addNewOne hi_env mod_nm (path, mk_module mod_nm), hib_env)
- add_vhib mod_nm = (hi_env, addToFM_C overrideNew hib_env mod_nm (path, mk_module mod_nm))
- add_hib mod_nm = (hi_env, addToFM_C addNewOne hib_env mod_nm (path, mk_module mod_nm))
-
-
- -- go prefix (prefix ++ stuff) == Just (reverse stuff)
- go [] xs = Just (_PK_ (reverse xs))
- go _ [] = Nothing
- go (x:xs) (y:ys) | x == y = go xs ys
- | otherwise = Nothing
-
- addNewOne | opt_WarnHiShadows = conflict
- | otherwise = stickWithOld
-
- stickWithOld old new = old
- overrideNew old new = new
-
- conflict (old_path,mod) (new_path,_)
- | old_path /= new_path =
- pprTrace "Warning: " (text "Identically named interface files present on the import path, " $$
- text (show old_path) <+> text "shadows" $$
- text (show new_path) $$
- text "on the import path: " <+>
- text (concat (intersperse ":" (map fst dirs))))
- (old_path,mod)
- | otherwise = (old_path,mod) -- don't warn about innocous shadowings.
-\end{code}
-
-
-%*********************************************************
-%* *
-\subsection{Making a search path}
-%* *
-%*********************************************************
-
-@mkSearchPath@ takes a string consisting of a colon-separated list
-of directories and corresponding suffixes, and turns it into a list
-of (directory, suffix) pairs. For example:
-
-\begin{verbatim}
- mkSearchPath "foo%.hi:.%.p_hi:baz%.mc_hi"
- = [("foo",".hi"),( ".", ".p_hi"), ("baz",".mc_hi")]
-\begin{verbatim}
-
-\begin{code}
-mkSearchPath :: Maybe String -> SearchPath
-mkSearchPath Nothing = [(".",".hi")] -- ToDo: default should be to look in
- -- the directory the module we're compiling
- -- lives.
-mkSearchPath (Just s) = go s
- where
- go "" = []
- go s =
- case span (/= '%') s of
- (dir,'%':rs) ->
- case span (/= ':') rs of
- (hisuf,_:rest) -> (dir,hisuf):go rest
- (hisuf,[]) -> [(dir,hisuf)]
-\end{code}
-
+%\r
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998\r
+%\r
+\section[Module]{The @Module@ module.}\r
+\r
+Representing modules and their flavours.\r
+\r
+\begin{code}\r
+module Module \r
+ (\r
+ Module -- abstract, instance of Eq, Ord, Outputable\r
+ , ModuleName\r
+\r
+ , moduleNameString -- :: ModuleName -> EncodedString\r
+ , moduleNameUserString -- :: ModuleName -> UserString\r
+\r
+ , moduleString -- :: Module -> EncodedString\r
+ , moduleUserString -- :: Module -> UserString\r
+ , moduleName -- :: Module -> ModuleName\r
+\r
+ , mkVanillaModule -- :: ModuleName -> Module\r
+ , mkThisModule -- :: ModuleName -> Module\r
+ , mkPrelModule -- :: UserString -> Module\r
+\r
+ , isDynamicModule -- :: Module -> Bool\r
+ , isLibModule\r
+\r
+ , mkSrcModule\r
+\r
+ , mkSrcModuleFS -- :: UserFS -> ModuleName\r
+ , mkSysModuleFS -- :: EncodedFS -> ModuleName\r
+\r
+ , pprModule, pprModuleName\r
+ \r
+ -- DllFlavour\r
+ , DllFlavour, dll, notDll\r
+\r
+ -- ModFlavour\r
+ , ModFlavour, libMod, userMod\r
+\r
+ -- Where to find a .hi file\r
+ , WhereFrom(..), SearchPath, mkSearchPath\r
+ , ModuleHiMap, mkModuleHiMaps\r
+\r
+ ) where\r
+\r
+#include "HsVersions.h"\r
+import OccName\r
+import Outputable\r
+import FiniteMap\r
+import CmdLineOpts ( opt_Static, opt_CompilingPrelude, opt_WarnHiShadows )\r
+import Constants ( interfaceFileFormatVersion )\r
+import Maybes ( seqMaybe )\r
+import Maybe ( fromMaybe )\r
+import Directory ( doesFileExist )\r
+import DirUtils ( getDirectoryContents )\r
+import List ( intersperse )\r
+import Monad ( foldM )\r
+import IO ( hPutStrLn, stderr, isDoesNotExistError )\r
+\end{code}\r
+\r
+\r
+%************************************************************************\r
+%* *\r
+\subsection{Interface file flavour}\r
+%* *\r
+%************************************************************************\r
+\r
+A further twist to the tale is the support for dynamically linked libraries under\r
+Win32. Here, dealing with the use of global variables that's residing in a DLL\r
+requires special handling at the point of use (there's an extra level of indirection,\r
+i.e., (**v) to get at v's value, rather than just (*v) .) When slurping in an\r
+interface file we then record whether it's coming from a .hi corresponding to a\r
+module that's packaged up in a DLL or not, so that we later can emit the\r
+appropriate code.\r
+\r
+The logic for how an interface file is marked as corresponding to a module that's\r
+hiding in a DLL is explained elsewhere (ToDo: give renamer href here.)\r
+\r
+\begin{code}\r
+data DllFlavour = NotDll -- Ordinary module\r
+ | Dll -- The module's object code lives in a DLL.\r
+ deriving( Eq )\r
+\r
+dll = Dll\r
+notDll = NotDll\r
+\r
+instance Text DllFlavour where -- Just used in debug prints of lex tokens\r
+ showsPrec n NotDll s = s\r
+ showsPrec n Dll s = "dll " ++ s\r
+\end{code}\r
+\r
+\r
+%************************************************************************\r
+%* *\r
+\subsection{System/user module}\r
+%* *\r
+%************************************************************************\r
+\r
+We also track whether an imported module is from a 'system-ish' place. In this case\r
+we don't record the fact that this module depends on it, nor usages of things\r
+inside it. \r
+\r
+\begin{code}\r
+data ModFlavour = LibMod -- A library-ish module\r
+ | UserMod -- Not library-ish\r
+\r
+libMod = LibMod\r
+userMod = UserMod\r
+\end{code}\r
+\r
+\r
+%************************************************************************\r
+%* *\r
+\subsection{Where from}\r
+%* *\r
+%************************************************************************\r
+\r
+The @WhereFrom@ type controls where the renamer looks for an interface file\r
+\r
+\begin{code}\r
+data WhereFrom = ImportByUser -- Ordinary user import: look for M.hi\r
+ | ImportByUserSource -- User {- SOURCE -}: look for M.hi-boot\r
+ | ImportBySystem -- Non user import. Look for M.hi if M is in\r
+ -- the module this module depends on, or is a system-ish module; \r
+ -- M.hi-boot otherwise\r
+\r
+instance Outputable WhereFrom where\r
+ ppr ImportByUser = empty\r
+ ppr ImportByUserSource = ptext SLIT("{- SOURCE -}")\r
+ ppr ImportBySystem = ptext SLIT("{- SYSTEM IMPORT -}")\r
+\end{code}\r
+\r
+\r
+%************************************************************************\r
+%* *\r
+\subsection{The name of a module}\r
+%* *\r
+%************************************************************************\r
+\r
+\begin{code}\r
+type ModuleName = EncodedFS\r
+ -- Haskell module names can include the quote character ',\r
+ -- so the module names have the z-encoding applied to them\r
+\r
+\r
+pprModuleName :: ModuleName -> SDoc\r
+pprModuleName nm = pprEncodedFS nm\r
+\r
+moduleNameString :: ModuleName -> EncodedString\r
+moduleNameString mod = _UNPK_ mod\r
+\r
+moduleNameUserString :: ModuleName -> UserString\r
+moduleNameUserString mod = decode (_UNPK_ mod)\r
+\r
+mkSrcModule :: UserString -> ModuleName\r
+mkSrcModule s = _PK_ (encode s)\r
+\r
+mkSrcModuleFS :: UserFS -> ModuleName\r
+mkSrcModuleFS s = encodeFS s\r
+\r
+mkSysModuleFS :: EncodedFS -> ModuleName\r
+mkSysModuleFS s = s \r
+\end{code}\r
+\r
+\begin{code}\r
+data Module = Module\r
+ ModuleName\r
+ ModFlavour\r
+ DllFlavour\r
+\end{code}\r
+\r
+\begin{code}\r
+instance Outputable Module where\r
+ ppr = pprModule\r
+\r
+instance Eq Module where\r
+ (Module m1 _ _) == (Module m2 _ _) = m1 == m2\r
+\r
+instance Ord Module where\r
+ (Module m1 _ _) `compare` (Module m2 _ _) = m1 `compare` m2\r
+\end{code}\r
+\r
+\r
+\begin{code}\r
+pprModule :: Module -> SDoc\r
+pprModule (Module mod _ _) = pprEncodedFS mod\r
+\end{code}\r
+\r
+\r
+\begin{code}\r
+mkModule = Module\r
+\r
+mkVanillaModule :: ModuleName -> Module\r
+mkVanillaModule name = Module name UserMod NotDll\r
+\r
+mkThisModule :: ModuleName -> Module -- The module being comiled\r
+mkThisModule name = Module name UserMod NotDll -- ToDo: correct Dll flag?\r
+\r
+mkPrelModule :: ModuleName -> Module\r
+mkPrelModule name = Module name sys dll\r
+ where \r
+ sys | opt_CompilingPrelude = UserMod\r
+ | otherwise = LibMod\r
+\r
+ dll | opt_Static || opt_CompilingPrelude = NotDll\r
+ | otherwise = Dll\r
+\r
+moduleString :: Module -> EncodedString\r
+moduleString (Module mod _ _) = _UNPK_ mod\r
+\r
+moduleName :: Module -> ModuleName\r
+moduleName (Module mod _ _) = mod\r
+\r
+moduleUserString :: Module -> UserString\r
+moduleUserString (Module mod _ _) = moduleNameUserString mod\r
+\end{code}\r
+\r
+\begin{code}\r
+isDynamicModule :: Module -> Bool\r
+isDynamicModule (Module _ _ Dll) = True\r
+isDynamicModule _ = False\r
+\r
+isLibModule :: Module -> Bool\r
+isLibModule (Module _ LibMod _) = True\r
+isLibModule _ = False\r
+\end{code}\r
+\r
+\r
+%************************************************************************\r
+%* *\r
+\subsection{Finding modules in the file system\r
+%* *\r
+%************************************************************************\r
+\r
+\begin{code}\r
+type ModuleHiMap = FiniteMap ModuleName (String, Module)\r
+ -- Mapping from module name to \r
+ -- * the file path of its corresponding interface file, \r
+ -- * the Module, decorated with it's properties\r
+\end{code}\r
+\r
+(We allege that) it is quicker to build up a mapping from module names\r
+to the paths to their corresponding interface files once, than to search\r
+along the import part every time we slurp in a new module (which we \r
+do quite a lot of.)\r
+\r
+\begin{code}\r
+type SearchPath = [(String,String)] -- List of (directory,suffix) pairs to search \r
+ -- for interface files.\r
+\r
+mkModuleHiMaps :: SearchPath -> IO (ModuleHiMap, ModuleHiMap)\r
+mkModuleHiMaps dirs = foldM (getAllFilesMatching dirs) (env,env) dirs\r
+ where\r
+ env = emptyFM\r
+\r
+{- A pseudo file, currently "dLL_ifs.hi",\r
+ signals that the interface files\r
+ contained in a particular directory have got their\r
+ corresponding object codes stashed away in a DLL\r
+ \r
+ This stuff is only needed to deal with Win32 DLLs,\r
+ and conceivably we conditionally compile in support\r
+ for handling it. (ToDo?)\r
+-}\r
+dir_contain_dll_his = "dLL_ifs.hi"\r
+\r
+getAllFilesMatching :: SearchPath\r
+ -> (ModuleHiMap, ModuleHiMap)\r
+ -> (FilePath, String) \r
+ -> IO (ModuleHiMap, ModuleHiMap)\r
+getAllFilesMatching dirs hims (dir_path, suffix) = ( do\r
+ -- fpaths entries do not have dir_path prepended\r
+ fpaths <- getDirectoryContents dir_path\r
+ is_dll <- catch\r
+ (if opt_Static || dir_path == "." then\r
+ return NotDll\r
+ else\r
+ do exists <- doesFileExist (dir_path ++ '/': dir_contain_dll_his)\r
+ return (if exists then Dll else NotDll)\r
+ )\r
+ (\ _ {-don't care-} -> return NotDll)\r
+ return (foldl (addModules is_dll) hims fpaths)\r
+ ) -- soft failure\r
+ `catch` \r
+ (\ err -> do\r
+ hPutStrLn stderr\r
+ ("Import path element `" ++ dir_path ++ \r
+ if (isDoesNotExistError err) then\r
+ "' does not exist, ignoring."\r
+ else\r
+ "' couldn't read, ignoring.")\r
+ \r
+ return hims\r
+ )\r
+ where\r
+ \r
+ -- Dreadfully crude. We want a better way to distinguish\r
+ -- "library-ish" modules.\r
+ is_sys | head dir_path == '/' = LibMod\r
+ | otherwise = UserMod\r
+\r
+ xiffus = reverse dotted_suffix \r
+ dotted_suffix = case suffix of\r
+ [] -> []\r
+ ('.':xs) -> suffix\r
+ ls -> '.':ls\r
+\r
+ hi_boot_version_xiffus = \r
+ reverse (show interfaceFileFormatVersion) ++ '-':hi_boot_xiffus\r
+ hi_boot_xiffus = "toob-ih." -- .hi-boot reversed!\r
+\r
+ addModules is_dll his@(hi_env, hib_env) filename = fromMaybe his $ \r
+ FMAP add_hi (go xiffus rev_fname) `seqMaybe`\r
+\r
+ FMAP add_vhib (go hi_boot_version_xiffus rev_fname) `seqMaybe`\r
+ -- If there's a Foo.hi-boot-N file then override any Foo.hi-boot\r
+\r
+ FMAP add_hib (go hi_boot_xiffus rev_fname)\r
+ where\r
+ rev_fname = reverse filename\r
+ path = dir_path ++ '/':filename\r
+\r
+ -- In these functions file_nm is the base of the filename,\r
+ -- with the path and suffix both stripped off. The filename\r
+ -- is the *unencoded* module name (else 'make' gets confused).\r
+ -- But the domain of the HiMaps is ModuleName which is encoded.\r
+ add_hi file_nm = (add_to_map addNewOne hi_env file_nm, hib_env)\r
+ add_vhib file_nm = (hi_env, add_to_map overrideNew hib_env file_nm)\r
+ add_hib file_nm = (hi_env, add_to_map addNewOne hib_env file_nm)\r
+\r
+ add_to_map combiner env file_nm \r
+ = addToFM_C combiner env mod_nm (path, mkModule mod_nm is_sys is_dll)\r
+ where\r
+ mod_nm = mkSrcModuleFS file_nm\r
+\r
+ -- go prefix (prefix ++ stuff) == Just (reverse stuff)\r
+ go [] xs = Just (_PK_ (reverse xs))\r
+ go _ [] = Nothing\r
+ go (x:xs) (y:ys) | x == y = go xs ys \r
+ | otherwise = Nothing\r
+\r
+ addNewOne | opt_WarnHiShadows = conflict\r
+ | otherwise = stickWithOld\r
+\r
+ stickWithOld old new = old\r
+ overrideNew old new = new\r
+\r
+ conflict (old_path,mod) (new_path,_)\r
+ | old_path /= new_path = \r
+ pprTrace "Warning: " (text "Identically named interface files present on the import path, " $$\r
+ text (show old_path) <+> text "shadows" $$\r
+ text (show new_path) $$\r
+ text "on the import path: " <+> \r
+ text (concat (intersperse ":" (map fst dirs))))\r
+ (old_path,mod)\r
+ | otherwise = (old_path,mod) -- don't warn about innocous shadowings.\r
+\end{code}\r
+\r
+\r
+%*********************************************************\r
+%* *\r
+\subsection{Making a search path}\r
+%* *\r
+%*********************************************************\r
+\r
+@mkSearchPath@ takes a string consisting of a colon-separated list\r
+of directories and corresponding suffixes, and turns it into a list\r
+of (directory, suffix) pairs. For example:\r
+\r
+\begin{verbatim}\r
+ mkSearchPath "foo%.hi:.%.p_hi:baz%.mc_hi"\r
+ = [("foo",".hi"),( ".", ".p_hi"), ("baz",".mc_hi")]\r
+\begin{verbatim}\r
+\r
+\begin{code}\r
+mkSearchPath :: Maybe String -> SearchPath\r
+mkSearchPath Nothing = [(".",".hi")] -- ToDo: default should be to look in\r
+ -- the directory the module we're compiling\r
+ -- lives.\r
+mkSearchPath (Just s) = go s\r
+ where\r
+ go "" = []\r
+ go s = \r
+ case span (/= '%') s of\r
+ (dir,'%':rs) ->\r
+ case span (/= ':') rs of\r
+ (hisuf,_:rest) -> (dir,hisuf):go rest\r
+ (hisuf,[]) -> [(dir,hisuf)]\r
+\end{code}\r
+\r
projects / ghc-hetmet.git / commitdiff