2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-2002
7 Simply the name of a module, represented as a Z-encoded FastString.
8 These are Uniquable, hence we can build FiniteMaps with ModuleNames as
14 A ModuleName with some additional information, namely whether the
15 module resides in the Home package or in a different package. We need
16 to know this for two reasons:
18 * generating cross-DLL calls is different from intra-DLL calls
20 * we don't record version information in interface files for entities
21 in a different package.
23 The unique of a Module is identical to the unique of a ModuleName, so
24 it is safe to look up in a Module map using a ModuleName and vice
29 When compiling module A, which imports module B, we need to
30 know whether B will be in the same DLL as A.
31 If it's in the same DLL, we refer to B_f_closure
32 If it isn't, we refer to _imp__B_f_closure
33 When compiling A, we record in B's Module value whether it's
34 in a different DLL, by setting the DLL flag.
42 Module, -- Abstract, instance of Eq, Ord, Outputable
48 , pprModuleName -- :: ModuleName -> SDoc
51 , moduleName -- :: Module -> ModuleName
52 , moduleNameString -- :: ModuleName -> EncodedString
53 , moduleNameUserString -- :: ModuleName -> UserString
54 , moduleNameFS -- :: ModuleName -> EncodedFS
56 , moduleString -- :: Module -> EncodedString
57 , moduleUserString -- :: Module -> UserString
59 , mkVanillaModule -- :: ModuleName -> Module
60 , isVanillaModule -- :: Module -> Bool
61 , mkPrelModule -- :: UserString -> Module
62 , mkHomeModule -- :: ModuleName -> Module
63 , isHomeModule -- :: Module -> Bool
64 , mkPackageModule -- :: ModuleName -> Module
66 , mkModuleName -- :: UserString -> ModuleName
67 , mkModuleNameFS -- :: UserFS -> ModuleName
68 , mkSysModuleNameFS -- :: EncodedFS -> ModuleName
73 , elemModuleEnv, extendModuleEnv, extendModuleEnvList, plusModuleEnv_C
74 , delModuleEnvList, delModuleEnv, plusModuleEnv, lookupModuleEnv
75 , lookupWithDefaultModuleEnv, mapModuleEnv, mkModuleEnv, emptyModuleEnv
76 , moduleEnvElts, unitModuleEnv, isEmptyModuleEnv, foldModuleEnv
78 , lookupModuleEnvByName, extendModuleEnvByName, unitModuleEnvByName
80 , ModuleSet, emptyModuleSet, mkModuleSet, moduleSetElts, extendModuleSet, elemModuleSet
84 #include "HsVersions.h"
87 import Packages ( PackageName, preludePackage )
88 import CmdLineOpts ( opt_InPackage )
89 import FastString ( FastString )
90 import Unique ( Uniquable(..) )
91 import Maybes ( expectJust )
99 %************************************************************************
101 \subsection{Interface file flavour}
103 %************************************************************************
105 A further twist to the tale is the support for dynamically linked
106 libraries under Win32. Here, dealing with the use of global variables
107 that's residing in a DLL requires special handling at the point of use
108 (there's an extra level of indirection, i.e., (**v) to get at v's
109 value, rather than just (*v) .) When slurping in an interface file we
110 then record whether it's coming from a .hi corresponding to a module
111 that's packaged up in a DLL or not, so that we later can emit the
114 The logic for how an interface file is marked as corresponding to a
115 module that's hiding in a DLL is explained elsewhere (ToDo: give
119 data Module = Module ModuleName !PackageInfo
121 instance Binary Module where
122 put_ bh (Module m p) = put_ bh m
123 get bh = do m <- get bh; return (Module m DunnoYet)
126 = ThisPackage -- A module from the same package
127 -- as the one being compiled
128 | AnotherPackage -- A module from a different package
130 | DunnoYet -- This is used when we don't yet know
131 -- Main case: we've come across Foo.x in an interface file
132 -- but we havn't yet opened Foo.hi. We need a Name for Foo.x
133 -- Later on (in RnEnv.newTopBinder) we'll update the cache
134 -- to have the right PackageName
136 packageInfoPackage :: PackageInfo -> PackageName
137 packageInfoPackage ThisPackage = opt_InPackage
138 packageInfoPackage DunnoYet = FSLIT("<?>")
139 packageInfoPackage AnotherPackage = FSLIT("<pkg>")
141 instance Outputable PackageInfo where
142 -- Just used in debug prints of lex tokens and in debug modde
143 ppr pkg_info = ppr (packageInfoPackage pkg_info)
147 %************************************************************************
149 \subsection{Module locations}
151 %************************************************************************
156 ml_hs_file :: Maybe FilePath,
157 ml_hspp_file :: Maybe FilePath, -- path of preprocessed source
158 ml_hi_file :: FilePath,
159 ml_obj_file :: Maybe FilePath
163 instance Outputable ModLocation where
166 -- Rather a gruesome function to have in Module
168 showModMsg :: Bool -> Module -> ModLocation -> String
169 showModMsg use_object mod location =
170 mod_str ++ replicate (max 0 (16 - length mod_str)) ' '
171 ++" ( " ++ expectJust "showModMsg" (ml_hs_file location) ++ ", "
173 then expectJust "showModMsg" (ml_obj_file location)
176 where mod_str = moduleUserString mod
179 For a module in another package, the hs_file and obj_file
180 components of ModLocation are undefined.
182 The locations specified by a ModLocation may or may not
183 correspond to actual files yet: for example, even if the object
184 file doesn't exist, the ModLocation still contains the path to
185 where the object file will reside if/when it is created.
188 %************************************************************************
190 \subsection{The name of a module}
192 %************************************************************************
195 newtype ModuleName = ModuleName EncodedFS
196 -- Haskell module names can include the quote character ',
197 -- so the module names have the z-encoding applied to them
199 instance Binary ModuleName where
200 put_ bh (ModuleName m) = put_ bh m
201 get bh = do m <- get bh; return (ModuleName m)
203 instance Uniquable ModuleName where
204 getUnique (ModuleName nm) = getUnique nm
206 instance Eq ModuleName where
207 nm1 == nm2 = getUnique nm1 == getUnique nm2
209 -- Warning: gives an ordering relation based on the uniques of the
210 -- FastStrings which are the (encoded) module names. This is _not_
211 -- a lexicographical ordering.
212 instance Ord ModuleName where
213 nm1 `compare` nm2 = getUnique nm1 `compare` getUnique nm2
215 instance Outputable ModuleName where
219 pprModuleName :: ModuleName -> SDoc
220 pprModuleName (ModuleName nm) = pprEncodedFS nm
222 moduleNameFS :: ModuleName -> EncodedFS
223 moduleNameFS (ModuleName mod) = mod
225 moduleNameString :: ModuleName -> EncodedString
226 moduleNameString (ModuleName mod) = unpackFS mod
228 moduleNameUserString :: ModuleName -> UserString
229 moduleNameUserString (ModuleName mod) = decode (unpackFS mod)
231 -- used to be called mkSrcModule
232 mkModuleName :: UserString -> ModuleName
233 mkModuleName s = ModuleName (mkFastString (encode s))
235 -- used to be called mkSrcModuleFS
236 mkModuleNameFS :: UserFS -> ModuleName
237 mkModuleNameFS s = ModuleName (encodeFS s)
239 -- used to be called mkSysModuleFS
240 mkSysModuleNameFS :: EncodedFS -> ModuleName
241 mkSysModuleNameFS s = ModuleName s
245 instance Outputable Module where
248 instance Uniquable Module where
249 getUnique (Module nm _) = getUnique nm
251 -- Same if they have the same name.
252 instance Eq Module where
253 m1 == m2 = getUnique m1 == getUnique m2
255 -- Warning: gives an ordering relation based on the uniques of the
256 -- FastStrings which are the (encoded) module names. This is _not_
257 -- a lexicographical ordering.
258 instance Ord Module where
259 m1 `compare` m2 = getUnique m1 `compare` getUnique m2
264 pprModule :: Module -> SDoc
265 pprModule (Module mod p) = getPprStyle $ \ sty ->
266 if debugStyle sty then
267 -- Print the package too
268 -- Don't use '.' because it gets confused
270 brackets (ppr p) <> pprModuleName mod
277 mkPrelModule :: ModuleName -> Module
279 = Module mod_nm pack_info
282 | opt_InPackage == preludePackage = ThisPackage
283 | otherwise = AnotherPackage
285 mkHomeModule :: ModuleName -> Module
286 mkHomeModule mod_nm = Module mod_nm ThisPackage
288 isHomeModule :: Module -> Bool
289 isHomeModule (Module nm ThisPackage) = True
290 isHomeModule _ = False
292 mkPackageModule :: ModuleName -> Module
293 mkPackageModule mod_nm = Module mod_nm AnotherPackage
295 -- Used temporarily when we first come across Foo.x in an interface
296 -- file, but before we've opened Foo.hi.
297 -- (Until we've opened Foo.hi we don't know what the Package is.)
298 mkVanillaModule :: ModuleName -> Module
299 mkVanillaModule name = Module name DunnoYet
301 isVanillaModule :: Module -> Bool
302 isVanillaModule (Module nm DunnoYet) = True
303 isVanillaModule _ = False
305 moduleString :: Module -> EncodedString
306 moduleString (Module (ModuleName fs) _) = unpackFS fs
308 moduleName :: Module -> ModuleName
309 moduleName (Module mod pkg_info) = mod
311 moduleUserString :: Module -> UserString
312 moduleUserString (Module mod _) = moduleNameUserString mod
314 printModulePrefix :: Module -> Bool
315 -- When printing, say M.x
316 printModulePrefix (Module nm ThisPackage) = False
317 printModulePrefix _ = True
321 %************************************************************************
323 \subsection{@ModuleEnv@s}
325 %************************************************************************
328 type ModuleEnv elt = UniqFM elt
329 -- A ModuleName and Module have the same Unique,
330 -- so both will work as keys.
331 -- The 'ByName' variants work on ModuleNames
333 emptyModuleEnv :: ModuleEnv a
334 mkModuleEnv :: [(Module, a)] -> ModuleEnv a
335 unitModuleEnv :: Module -> a -> ModuleEnv a
336 extendModuleEnv :: ModuleEnv a -> Module -> a -> ModuleEnv a
337 extendModuleEnv_C :: (a->a->a) -> ModuleEnv a -> Module -> a -> ModuleEnv a
338 plusModuleEnv :: ModuleEnv a -> ModuleEnv a -> ModuleEnv a
339 extendModuleEnvList :: ModuleEnv a -> [(Module, a)] -> ModuleEnv a
341 delModuleEnvList :: ModuleEnv a -> [Module] -> ModuleEnv a
342 delModuleEnv :: ModuleEnv a -> Module -> ModuleEnv a
343 plusModuleEnv_C :: (a -> a -> a) -> ModuleEnv a -> ModuleEnv a -> ModuleEnv a
344 mapModuleEnv :: (a -> b) -> ModuleEnv a -> ModuleEnv b
345 moduleEnvElts :: ModuleEnv a -> [a]
347 isEmptyModuleEnv :: ModuleEnv a -> Bool
348 lookupModuleEnv :: ModuleEnv a -> Module -> Maybe a
349 lookupWithDefaultModuleEnv :: ModuleEnv a -> a -> Module -> a
350 elemModuleEnv :: Module -> ModuleEnv a -> Bool
351 foldModuleEnv :: (a -> b -> b) -> b -> ModuleEnv a -> b
353 -- The ByName variants
354 lookupModuleEnvByName :: ModuleEnv a -> ModuleName -> Maybe a
355 unitModuleEnvByName :: ModuleName -> a -> ModuleEnv a
356 extendModuleEnvByName :: ModuleEnv a -> ModuleName -> a -> ModuleEnv a
358 elemModuleEnv = elemUFM
359 extendModuleEnv = addToUFM
360 extendModuleEnvByName = addToUFM
361 extendModuleEnv_C = addToUFM_C
362 extendModuleEnvList = addListToUFM
363 plusModuleEnv_C = plusUFM_C
364 delModuleEnvList = delListFromUFM
365 delModuleEnv = delFromUFM
366 plusModuleEnv = plusUFM
367 lookupModuleEnv = lookupUFM
368 lookupModuleEnvByName = lookupUFM
369 lookupWithDefaultModuleEnv = lookupWithDefaultUFM
370 mapModuleEnv = mapUFM
371 mkModuleEnv = listToUFM
372 emptyModuleEnv = emptyUFM
373 moduleEnvElts = eltsUFM
374 unitModuleEnv = unitUFM
375 unitModuleEnvByName = unitUFM
376 isEmptyModuleEnv = isNullUFM
377 foldModuleEnv = foldUFM
382 type ModuleSet = UniqSet Module
383 mkModuleSet :: [Module] -> ModuleSet
384 extendModuleSet :: ModuleSet -> Module -> ModuleSet
385 emptyModuleSet :: ModuleSet
386 moduleSetElts :: ModuleSet -> [Module]
387 elemModuleSet :: Module -> ModuleSet -> Bool
389 emptyModuleSet = emptyUniqSet
390 mkModuleSet = mkUniqSet
391 extendModuleSet = addOneToUniqSet
392 moduleSetElts = uniqSetToList
393 elemModuleSet = elementOfUniqSet