2 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
4 \section[RnNames]{Extracting imported and top-level names in scope}
7 #include "HsVersions.h"
14 import PreludeGlaST ( MutableVar(..) )
23 import RnIfaces ( IfaceCache(..), cachedIface, cachedDecl )
24 import RnUtils ( RnEnv(..), emptyRnEnv, extendGlobalRnEnv,
25 lubExportFlag, qualNameErr, dupNamesErr
27 import ParseUtils ( ParsedIface(..), RdrIfaceDecl(..), RdrIfaceInst )
30 import Bag ( emptyBag, unitBag, consBag, snocBag, unionBags,
31 unionManyBags, mapBag, filterBag, listToBag, bagToList )
32 import CmdLineOpts ( opt_NoImplicitPrelude, opt_CompilingPrelude )
33 import ErrUtils ( Error(..), Warning(..), addErrLoc, addShortErrLocLine, addShortWarnLocLine )
34 import FiniteMap ( emptyFM, addListToFM, lookupFM, fmToList, eltsFM, delListFromFM, keysFM{-ToDo:rm-} )
36 import Maybes ( maybeToBool, catMaybes, MaybeErr(..) )
37 import Name ( RdrName(..), Name, isQual, mkTopLevName, origName,
38 mkImportedName, nameExportFlag, nameImportFlag,
39 getLocalName, getSrcLoc, getImpLocs, moduleNamePair,
40 pprNonSym, isLexCon, isRdrLexCon, ExportFlag(..)
42 import PrelInfo ( BuiltinNames(..), BuiltinKeys(..) )
43 import PrelMods ( fromPrelude, pRELUDE_BUILTIN, pRELUDE, rATIO, iX )
45 import SrcLoc ( SrcLoc, mkBuiltinSrcLoc )
46 import TyCon ( tyConDataCons )
47 import UniqFM ( emptyUFM, addListToUFM_C, lookupUFM )
48 import UniqSupply ( splitUniqSupply )
49 import Util ( isIn, assoc, cmpPString, sortLt, removeDups,
50 equivClasses, panic, assertPanic, pprTrace{-ToDo:rm-}
56 type GlobalNameInfo = (BuiltinNames,
58 Name -> ExportFlag, -- export flag
59 Name -> [RdrName]) -- occurence names
61 type RnM_Info s r = RnMonad GlobalNameInfo s r
69 [Module], -- directly imported modules
70 Bag (Module,RnName), -- unqualified imports from module
71 Bag RenamedFixityDecl, -- imported fixity decls
75 getGlobalNames iface_cache info us
76 (HsModule mod _ _ imports _ ty_decls _ cls_decls _ _ _ binds _ _)
77 = case initRn True mod emptyRnEnv us1
79 getSourceNames ty_decls cls_decls binds)
80 of { ((src_vals, src_tcs), src_errs, src_warns) ->
82 doImportDecls iface_cache info us2 imports >>=
83 \ (imp_vals, imp_tcs, imp_mods, unqual_imps, imp_fixes, imp_errs, imp_warns) ->
86 unqual_vals = map (\rn -> (Unqual (getLocalName rn), rn)) (bagToList src_vals)
87 unqual_tcs = map (\rn -> (Unqual (getLocalName rn), rn)) (bagToList src_tcs)
89 (src_env, src_dups) = extendGlobalRnEnv emptyRnEnv unqual_vals unqual_tcs
90 (all_env, imp_dups) = extendGlobalRnEnv src_env (bagToList imp_vals) (bagToList imp_tcs)
92 -- remove dups of the same imported thing
93 diff_imp_dups = filterBag diff_orig imp_dups
94 diff_orig (_,rn1,rn2) = origName rn1 /= origName rn2
96 all_dups = bagToList (src_dups `unionBags` diff_imp_dups)
97 dup_errs = map dup_err (equivClasses cmp_rdr all_dups)
98 cmp_rdr (rdr1,_,_) (rdr2,_,_) = cmp rdr1 rdr2
99 dup_err ((rdr,rn1,rn2):rest) = globalDupNamesErr rdr (rn1:rn2: [rn|(_,_,rn)<-rest])
101 all_errs = src_errs `unionBags` imp_errs `unionBags` listToBag dup_errs
102 all_warns = src_warns `unionBags` imp_warns
104 return (all_env, imp_mods, unqual_imps, imp_fixes, all_errs, all_warns)
107 (us1, us2) = splitUniqSupply us
110 *********************************************************
112 \subsection{Top-level source names}
114 *********************************************************
119 -> [RdrNameClassDecl]
121 -> RnM_Info s (Bag RnName, -- values
122 Bag RnName) -- tycons/classes
124 getSourceNames ty_decls cls_decls binds
125 = mapAndUnzip3Rn getTyDeclNames ty_decls `thenRn` \ (tycon_s, constrs_s, fields_s) ->
126 mapAndUnzipRn getClassNames cls_decls `thenRn` \ (cls_s, cls_ops_s) ->
127 getTopBindsNames binds `thenRn` \ bind_names ->
128 returnRn (unionManyBags constrs_s `unionBags`
129 unionManyBags fields_s `unionBags`
130 unionManyBags cls_ops_s `unionBags` bind_names,
131 listToBag tycon_s `unionBags` listToBag cls_s)
134 getTyDeclNames :: RdrNameTyDecl
135 -> RnM_Info s (RnName, Bag RnName, Bag RnName) -- tycon, constrs and fields
137 getTyDeclNames (TyData _ tycon _ condecls _ _ src_loc)
138 = newGlobalName src_loc Nothing False{-not val-} tycon `thenRn` \ tycon_name ->
139 getConFieldNames (Just (nameExportFlag tycon_name)) emptyBag emptyBag emptyFM
140 condecls `thenRn` \ (con_names, field_names) ->
142 rn_tycon = RnData tycon_name con_names field_names
143 rn_constrs = [ RnConstr name tycon_name | name <- con_names]
144 rn_fields = [ RnField name tycon_name | name <- field_names]
146 returnRn (rn_tycon, listToBag rn_constrs, listToBag rn_fields)
148 getTyDeclNames (TyNew _ tycon _ [NewConDecl con _ con_loc] _ _ src_loc)
149 = newGlobalName src_loc Nothing False{-not val-} tycon `thenRn` \ tycon_name ->
150 newGlobalName con_loc (Just (nameExportFlag tycon_name)) True{-val-} con
151 `thenRn` \ con_name ->
152 returnRn (RnData tycon_name [con_name] [],
153 unitBag (RnConstr con_name tycon_name),
156 getTyDeclNames (TySynonym tycon _ _ src_loc)
157 = newGlobalName src_loc Nothing False{-not val-} tycon `thenRn` \ tycon_name ->
158 returnRn (RnSyn tycon_name, emptyBag, emptyBag)
161 getConFieldNames exp constrs fields have []
162 = returnRn (bagToList constrs, bagToList fields)
164 getConFieldNames exp constrs fields have (ConDecl con _ src_loc : rest)
165 = newGlobalName src_loc exp True{-val-} con `thenRn` \ con_name ->
166 getConFieldNames exp (constrs `snocBag` con_name) fields have rest
168 getConFieldNames exp constrs fields have (ConOpDecl _ con _ src_loc : rest)
169 = newGlobalName src_loc exp True{-val-} con `thenRn` \ con_name ->
170 getConFieldNames exp (constrs `snocBag` con_name) fields have rest
172 getConFieldNames exp constrs fields have (RecConDecl con fielddecls src_loc : rest)
173 = mapRn (addErrRn . dupFieldErr con src_loc) dups `thenRn_`
174 newGlobalName src_loc exp True{-val-} con `thenRn` \ con_name ->
175 mapRn (newGlobalName src_loc exp True{-val-}) new_fields `thenRn` \ field_names ->
177 all_constrs = constrs `snocBag` con_name
178 all_fields = fields `unionBags` listToBag field_names
180 getConFieldNames exp all_constrs all_fields new_have rest
182 (uniq_fields, dups) = removeDups cmp (concat (map fst fielddecls))
183 new_fields = filter (not . maybeToBool . lookupFM have) uniq_fields
184 new_have = addListToFM have (zip new_fields (repeat ()))
186 getClassNames :: RdrNameClassDecl
187 -> RnM_Info s (RnName, Bag RnName) -- class and class ops
189 getClassNames (ClassDecl _ cname _ sigs _ _ src_loc)
190 = newGlobalName src_loc Nothing False{-notval-} cname `thenRn` \ class_name ->
191 getClassOpNames (Just (nameExportFlag class_name))
192 sigs `thenRn` \ op_names ->
193 returnRn (RnClass class_name op_names,
194 listToBag (map (\ n -> RnClassOp n class_name) op_names))
196 getClassOpNames exp []
198 getClassOpNames exp (ClassOpSig op _ _ src_loc : sigs)
199 = newGlobalName src_loc exp True{-val-} op `thenRn` \ op_name ->
200 getClassOpNames exp sigs `thenRn` \ op_names ->
201 returnRn (op_name : op_names)
202 getClassOpNames exp (_ : sigs)
203 = getClassOpNames exp sigs
206 *********************************************************
208 \subsection{Bindings}
210 *********************************************************
213 getTopBindsNames :: RdrNameHsBinds
214 -> RnM_Info s (Bag RnName)
216 getTopBindsNames binds = doBinds binds
218 doBinds EmptyBinds = returnRn emptyBag
219 doBinds (SingleBind bind) = doBind bind
220 doBinds (BindWith bind sigs) = doBind bind
221 doBinds (ThenBinds binds1 binds2)
222 = andRn unionBags (doBinds binds1) (doBinds binds2)
224 doBind EmptyBind = returnRn emptyBag
225 doBind (NonRecBind mbind) = doMBinds mbind
226 doBind (RecBind mbind) = doMBinds mbind
228 doMBinds EmptyMonoBinds = returnRn emptyBag
229 doMBinds (PatMonoBind pat grhss_and_binds locn) = doPat locn pat
230 doMBinds (FunMonoBind p_name _ _ locn) = doName locn p_name
231 doMBinds (AndMonoBinds mbinds1 mbinds2)
232 = andRn unionBags (doMBinds mbinds1) (doMBinds mbinds2)
235 = mapRn (doPat locn) pats `thenRn` \ pats_s ->
236 returnRn (unionManyBags pats_s)
238 doPat locn WildPatIn = returnRn emptyBag
239 doPat locn (LitPatIn _) = returnRn emptyBag
240 doPat locn (LazyPatIn pat) = doPat locn pat
241 doPat locn (VarPatIn var) = doName locn var
242 doPat locn (NegPatIn pat) = doPat locn pat
243 doPat locn (ParPatIn pat) = doPat locn pat
244 doPat locn (ListPatIn pats) = doPats locn pats
245 doPat locn (TuplePatIn pats) = doPats locn pats
246 doPat locn (ConPatIn name pats) = doPats locn pats
247 doPat locn (ConOpPatIn p1 op p2)
248 = andRn unionBags (doPat locn p1) (doPat locn p2)
249 doPat locn (AsPatIn as_name pat)
250 = andRn unionBags (doName locn as_name) (doPat locn pat)
251 doPat locn (RecPatIn name fields)
252 = mapRn (doField locn) fields `thenRn` \ fields_s ->
253 returnRn (unionManyBags fields_s)
255 doField locn (_, pat, _) = doPat locn pat
258 = newGlobalName locn Nothing True{-val-} rdr `thenRn` \ name ->
259 returnRn (unitBag (RnName name))
262 *********************************************************
264 \subsection{Creating a new global name}
266 *********************************************************
269 newGlobalName :: SrcLoc -> Maybe ExportFlag -> Bool{-True<=>value name,False<=>tycon/class-}
270 -> RdrName -> RnM_Info s Name
272 -- ToDo: b_names and b_keys being defined in this module !!!
274 newGlobalName locn maybe_exp is_val_name rdr
275 = getExtraRn `thenRn` \ ((b_val_names,b_tc_names),b_keys,exp_fn,occ_fn) ->
276 getModuleRn `thenRn` \ mod ->
277 rnGetUnique `thenRn` \ u ->
279 unqual = case rdr of { Qual m n -> n; Unqual n -> n }
281 orig = if fromPrelude mod
283 else (Qual mod unqual)
287 str_mod = case orig of { Qual m n -> (n, m); Unqual n -> (n, pRELUDE) }
291 --pprTrace "newGlobalName:" (ppAboves ((ppCat [ppPStr n, ppPStr m]) : [ ppCat [ppPStr x, ppPStr y] | (x,y) <- keysFM b_keys])) $
292 case (lookupFM b_keys str_mod) of
294 Nothing -> if not opt_CompilingPrelude then u else
295 case (lookupFM (if is_val_name then b_val_names else b_tc_names) str_mod) of
297 Just xx -> --pprTrace "Using Unique for:" (ppCat [ppPStr n, ppPStr m]) $
300 exp = case maybe_exp of
304 n = mkTopLevName uniq orig locn exp (occ_fn n) -- NB: two "n"s
306 addErrIfRn (isQual rdr) (qualNameErr "name in definition" (rdr, locn)) `thenRn_`
310 *********************************************************
312 \subsection{Imported names}
314 *********************************************************
317 type ImportNameInfo = (GlobalNameInfo,
318 FiniteMap (Module,FAST_STRING) RnName, -- values imported so far
319 FiniteMap (Module,FAST_STRING) RnName, -- tycons/classes imported so far
320 Name -> (ExportFlag, [SrcLoc])) -- import flag and src locns
322 type RnM_IInfo s r = RnMonad ImportNameInfo s r
326 -> GlobalNameInfo -- builtin and knot name info
328 -> [RdrNameImportDecl] -- import declarations
329 -> IO (Bag (RdrName,RnName), -- imported values in scope
330 Bag (RdrName,RnName), -- imported tycons/classes in scope
331 [Module], -- directly imported modules
332 Bag (Module,RnName), -- unqualified import from module
333 Bag RenamedFixityDecl, -- fixity info for imported names
337 doImportDecls iface_cache g_info us src_imps
338 = fixIO ( \ ~(_, _, _, _, _, _, rec_imp_stuff) ->
340 rec_imp_fm = addListToUFM_C add_stuff emptyUFM (bagToList rec_imp_stuff)
341 add_stuff (imp1,locns1) (imp2,locns2) = (lubExportFlag imp1 imp2, locns1 `unionBags` locns2)
343 rec_imp_fn :: Name -> (ExportFlag, [SrcLoc])
344 rec_imp_fn n = case lookupUFM rec_imp_fm n of
345 Nothing -> panic "RnNames:rec_imp_fn"
346 Just (flag, locns) -> (flag, bagToList locns)
348 i_info = (g_info, emptyFM, emptyFM, rec_imp_fn)
350 -- cache the imported modules
351 -- this ensures that all directly imported modules
352 -- will have their original name iface in scope
353 -- pprTrace "doImportDecls:" (ppCat (map ppPStr imp_mods)) $
354 accumulate (map (cachedIface False iface_cache) imp_mods) >>
356 -- process the imports
357 doImports iface_cache i_info us all_imps
359 ) >>= \ (vals, tcs, unquals, fixes, errs, warns, _) ->
361 return (vals, tcs, imp_mods, unquals, fixes,
362 imp_errs `unionBags` errs,
363 imp_warns `unionBags` warns)
365 the_imps = implicit_prel ++ src_imps
366 all_imps = implicit_qprel ++ the_imps
368 implicit_qprel = if opt_NoImplicitPrelude
369 then [{- no "import qualified Prelude" -}
370 ImportDecl pRELUDE_BUILTIN True Nothing Nothing prel_loc
372 else [ImportDecl pRELUDE True Nothing Nothing prel_loc]
374 explicit_prelude_imp = not (null [ () | (ImportDecl mod qual _ _ _) <- src_imps,
377 implicit_prel = if explicit_prelude_imp || opt_NoImplicitPrelude
378 then [{- no "import Prelude" -}
379 ImportDecl pRELUDE_BUILTIN False Nothing Nothing prel_loc
381 else [ImportDecl pRELUDE False Nothing Nothing prel_loc]
383 prel_loc = mkBuiltinSrcLoc
385 (uniq_imps, imp_dups) = removeDups cmp_mod the_imps
386 cmp_mod (ImportDecl m1 _ _ _ _) (ImportDecl m2 _ _ _ _) = cmpPString m1 m2
388 qprel_imps = [ imp | imp@(ImportDecl mod True Nothing _ _) <- src_imps,
391 qual_mods = [ (qual_name mod as_mod, imp) | imp@(ImportDecl mod True as_mod _ _) <- src_imps ]
392 qual_name mod (Just as_mod) = as_mod
393 qual_name mod Nothing = mod
395 (_, qual_dups) = removeDups cmp_qual qual_mods
396 bad_qual_dups = filter (not . all_same_mod) qual_dups
398 cmp_qual (q1,_) (q2,_) = cmpPString q1 q2
399 all_same_mod ((q,ImportDecl mod _ _ _ _):rest)
400 = all has_same_mod rest
402 has_same_mod (q,ImportDecl mod2 _ _ _ _) = mod == mod2
405 imp_mods = [ mod | ImportDecl mod _ _ _ _ <- uniq_imps, mod /= pRELUDE_BUILTIN ]
407 imp_warns = listToBag (map dupImportWarn imp_dups)
409 listToBag (map qualPreludeImportWarn qprel_imps)
411 imp_errs = listToBag (map dupQualImportErr bad_qual_dups)
413 doImports iface_cache i_info us []
414 = return (emptyBag, emptyBag, emptyBag, emptyBag, emptyBag, emptyBag, emptyBag)
415 doImports iface_cache i_info@(g_info,done_vals,done_tcs,imp_fn) us (imp:imps)
416 = doImport iface_cache i_info us1 imp
417 >>= \ (vals1, tcs1, unquals1, fixes1, errs1, warns1, imps1) ->
419 new_vals = [ (moduleNamePair rn, rn) | (_,rn) <- bagToList vals1,
420 not (maybeToBool (lookupFM done_vals (moduleNamePair rn))) ]
421 -- moduleNamePair computed twice
422 ext_vals = addListToFM done_vals new_vals
424 new_tcs = [ (moduleNamePair rn, rn) | (_,rn) <- bagToList tcs1,
425 not (maybeToBool (lookupFM done_tcs (moduleNamePair rn))) ]
426 ext_tcs = addListToFM done_tcs new_tcs
428 doImports iface_cache (g_info,ext_vals,ext_tcs,imp_fn) us2 imps
429 >>= \ (vals2, tcs2, unquals2, fixes2, errs2, warns2, imps2) ->
430 return (vals1 `unionBags` vals2,
431 tcs1 `unionBags` tcs2,
432 unquals1 `unionBags` unquals2,
433 fixes1 `unionBags` fixes2,
434 errs1 `unionBags` errs2,
435 warns1 `unionBags` warns2,
436 imps1 `unionBags` imps2)
438 (us1, us2) = splitUniqSupply us
441 doImport :: IfaceCache
445 -> IO (Bag (RdrName,RnName), -- values
446 Bag (RdrName,RnName), -- tycons/classes
447 Bag (Module,RnName), -- unqual imports
448 Bag RenamedFixityDecl,
451 Bag (RnName,(ExportFlag,Bag SrcLoc))) -- import flags and src locs
453 doImport iface_cache info us (ImportDecl mod qual maybe_as maybe_spec src_loc)
455 (b_vals, b_tcs, maybe_spec') = getBuiltins info mod maybe_spec
457 (if mod == pRELUDE_BUILTIN then
458 return (Succeeded (panic "doImport:PreludeBuiltin"),
459 \ iface -> ([], [], emptyBag))
461 --pprTrace "doImport:" (ppPStr mod) $
462 cachedIface False iface_cache mod >>= \ maybe_iface ->
463 return (maybe_iface, \ iface -> getOrigIEs iface maybe_spec')
464 ) >>= \ (maybe_iface, do_ies) ->
468 return (emptyBag, emptyBag, emptyBag, emptyBag,
469 unitBag err, emptyBag, emptyBag)
472 (ies, chk_ies, get_errs) = do_ies iface
474 doOrigIEs iface_cache info mod src_loc us ies
475 >>= \ (ie_vals, ie_tcs, imp_flags, errs, warns) ->
476 accumulate (map (checkOrigIE iface_cache) chk_ies)
477 >>= \ chk_errs_warns ->
479 final_vals = mapBag fst_occ b_vals `unionBags` mapBag pair_occ ie_vals
480 final_tcs = mapBag fst_occ b_tcs `unionBags` mapBag pair_occ ie_tcs
481 final_vals_list = bagToList final_vals
483 (if mod == pRELUDE_BUILTIN then
484 return [ (Nothing, emptyBag) | _ <- final_vals_list ]
486 accumulate (map (getFixityDecl iface_cache) final_vals_list)
487 ) >>= \ fix_maybes_errs ->
489 (chk_errs, chk_warns) = unzip chk_errs_warns
490 (fix_maybes, fix_errs) = unzip fix_maybes_errs
492 unquals = if qual then emptyBag
493 else mapBag pair_as (ie_vals `unionBags` ie_tcs)
495 final_fixes = listToBag (catMaybes fix_maybes)
497 final_errs = mapBag (\ err -> err mod src_loc) (unionManyBags (get_errs:chk_errs))
498 `unionBags` errs `unionBags` unionManyBags fix_errs
499 final_warns = mapBag (\ warn -> warn mod src_loc) (unionManyBags chk_warns)
501 imp_stuff = mapBag (\ (n,imp) -> (n,(imp,unitBag src_loc))) imp_flags
503 return (final_vals, final_tcs, unquals, final_fixes,
504 final_errs, final_warns, imp_stuff)
506 as_mod = case maybe_as of {Nothing -> mod; Just as_this -> as_this}
507 mk_occ str = if qual then Qual as_mod str else Unqual str
509 fst_occ (str, rn) = (mk_occ str, rn)
510 pair_occ rn = (mk_occ (getLocalName rn), rn)
511 pair_as rn = (as_mod, rn)
514 getBuiltins _ mod maybe_spec
515 | not (fromPrelude mod || mod == iX || mod == rATIO)
516 = (emptyBag, emptyBag, maybe_spec)
518 getBuiltins (((b_val_names,b_tc_names),_,_,_),_,_,_) mod maybe_spec
520 Nothing -> (all_vals, all_tcs, Nothing)
522 Just (True, ies) -> -- hiding does not work for builtin names
523 trace "getBuiltins: import Prelude hiding ( ... )" $
524 (all_vals, all_tcs, maybe_spec)
526 Just (False, ies) -> let
527 (vals,tcs,ies_left) = do_builtin ies
529 (vals, tcs, Just (False, ies_left))
531 all_vals = do_all_builtin (fmToList b_val_names)
532 all_tcs = do_all_builtin (fmToList b_tc_names)
534 filter_mod = if fromPrelude mod then pRELUDE else mod
536 do_all_builtin [] = emptyBag
537 do_all_builtin (((str,mod),rn):rest)
539 = (str, rn) `consBag` do_all_builtin rest
541 = do_all_builtin rest
543 do_builtin [] = (emptyBag,emptyBag,[])
545 = let str = unqual_str (ie_name ie)
547 case (lookupFM b_tc_names (str,mod)) of -- NB: we favour the tycon/class FM...
548 Just rn -> case (ie,rn) of
549 (IEThingAbs _, WiredInTyCon tc)
550 -> (vals, (str, rn) `consBag` tcs, ies_left)
551 (IEThingAll _, WiredInTyCon tc)
552 -> (listToBag (map (\ id -> (getLocalName id, WiredInId id))
555 (str,rn) `consBag` tcs, ies_left)
556 (IEThingWith _ _, WiredInTyCon tc) -- No checking of With...
557 -> (listToBag (map (\ id -> (getLocalName id, WiredInId id))
560 (str,rn) `consBag` tcs, ies_left)
561 _ -> panic "importing builtin names (1)"
564 case (lookupFM b_val_names (str,mod)) of
565 Nothing -> (vals, tcs, ie:ies_left)
566 Just rn -> case (ie,rn) of
567 (IEVar _, WiredInId _)
568 -> ((str, rn) `consBag` vals, tcs, ies_left)
569 _ -> panic "importing builtin names (2)"
571 (vals, tcs, ies_left) = do_builtin ies
574 getOrigIEs (ParsedIface _ _ _ _ _ _ exps _ _ _ _ _ _) Nothing -- import all
575 = (map mkAllIE (eltsFM exps), [], emptyBag)
577 getOrigIEs (ParsedIface _ _ _ _ _ _ exps _ _ _ _ _ _) (Just (True, ies)) -- import hiding
578 = (map mkAllIE (eltsFM exps_left), found_ies, errs)
580 (found_ies, errs) = lookupIEs exps ies
581 exps_left = delListFromFM exps (map (getLocalName.ie_name.fst) found_ies)
583 getOrigIEs (ParsedIface _ _ _ _ _ _ exps _ _ _ _ _ _) (Just (False, ies)) -- import these
584 = (map fst found_ies, found_ies, errs)
586 (found_ies, errs) = lookupIEs exps ies
589 mkAllIE (orig,ExportAbs)
590 = ASSERT(isLexCon (getLocalName orig))
592 mkAllIE (orig, ExportAll)
593 | isLexCon (getLocalName orig)
601 lookupIEs exps (ie:ies)
602 = case lookupFM exps (unqual_str (ie_name ie)) of
604 (orig_ies, unknownImpSpecErr ie `consBag` errs)
606 (orig_ie orig flag ie ++ orig_ies,
607 adderr_if (seen_ie orig orig_ies) (duplicateImpSpecErr ie) errs)
609 (orig_ies, errs) = lookupIEs exps ies
611 orig_ie orig flag (IEVar n) = [(IEVar orig, flag)]
612 orig_ie orig flag (IEThingAbs n) = [(IEThingAbs orig, flag)]
613 orig_ie orig flag (IEThingAll n) = [(IEThingAll orig, flag)]
614 orig_ie orig flag (IEThingWith n ns) = [(IEThingWith orig ns, flag)]
616 seen_ie orig seen_ies = any (\ (ie,_) -> orig == ie_name ie) seen_ies
619 doOrigIEs iface_cache info mod src_loc us []
620 = return (emptyBag,emptyBag,emptyBag,emptyBag,emptyBag)
622 doOrigIEs iface_cache info mod src_loc us (ie:ies)
623 = doOrigIE iface_cache info mod src_loc us1 ie
624 >>= \ (vals1, tcs1, imps1, errs1, warns1) ->
625 doOrigIEs iface_cache info mod src_loc us2 ies
626 >>= \ (vals2, tcs2, imps2, errs2, warns2) ->
627 return (vals1 `unionBags` vals2,
628 tcs1 `unionBags` tcs2,
629 imps1 `unionBags` imps2,
630 errs1 `unionBags` errs2,
631 warns1 `unionBags` warns2)
633 (us1, us2) = splitUniqSupply us
635 doOrigIE iface_cache info mod src_loc us ie
636 = with_decl iface_cache (ie_name ie)
637 (\ err -> (emptyBag, emptyBag, emptyBag, unitBag err, emptyBag))
638 (\ decl -> case initRn True mod emptyRnEnv us
640 pushSrcLocRn src_loc $
641 getIfaceDeclNames ie decl)
643 ((vals, tcs, imps), errs, warns) -> (vals, tcs, imps, errs, warns))
645 checkOrigIE iface_cache (IEThingAll n, ExportAbs)
646 = with_decl iface_cache n
647 (\ err -> (unitBag (\ mod locn -> err), emptyBag))
648 (\ decl -> case decl of
649 TypeSig _ _ _ -> (emptyBag, unitBag (allWhenSynImpSpecWarn n))
650 other -> (unitBag (allWhenAbsImpSpecErr n), emptyBag))
652 checkOrigIE iface_cache (IEThingWith n ns, ExportAbs)
653 = return (unitBag (withWhenAbsImpSpecErr n), emptyBag)
655 checkOrigIE iface_cache (IEThingWith n ns, ExportAll)
656 = with_decl iface_cache n
657 (\ err -> (unitBag (\ mod locn -> err), emptyBag))
658 (\ decl -> case decl of
659 NewTypeSig _ con _ _ -> (check_with "constructors" [con] ns, emptyBag)
660 DataSig _ cons fields _ _ -> (check_with "constructors (and fields)" (cons++fields) ns, emptyBag)
661 ClassSig _ ops _ _ -> (check_with "class ops" ops ns, emptyBag))
663 check_with str has rdrs
664 | sortLt (<) (map getLocalName has) == sortLt (<) (map unqual_str rdrs)
667 = unitBag (withImpSpecErr str n has rdrs)
669 checkOrigIE iface_cache other
670 = return (emptyBag, emptyBag)
673 with_decl iface_cache n do_err do_decl
674 = cachedDecl iface_cache (isRdrLexCon n) n >>= \ maybe_decl ->
676 Failed err -> return (do_err err)
677 Succeeded decl -> return (do_decl decl)
680 getFixityDecl iface_cache (_,rn)
682 (mod, str) = moduleNamePair rn
684 succeeded infx i = return (Just (infx rn i), emptyBag)
686 cachedIface True iface_cache mod >>= \ maybe_iface ->
689 return (Nothing, unitBag err)
690 Succeeded (ParsedIface _ _ _ _ _ _ _ _ fixes _ _ _ _) ->
691 case lookupFM fixes str of
692 Nothing -> return (Nothing, emptyBag)
693 Just (InfixL _ i) -> succeeded InfixL i
694 Just (InfixR _ i) -> succeeded InfixR i
695 Just (InfixN _ i) -> succeeded InfixN i
697 ie_name (IEVar n) = n
698 ie_name (IEThingAbs n) = n
699 ie_name (IEThingAll n) = n
700 ie_name (IEThingWith n _) = n
702 unqual_str (Unqual str) = str
703 unqual_str q@(Qual _ _) = panic "unqual_str"
705 adderr_if True err errs = err `consBag` errs
706 adderr_if False err errs = errs
709 *********************************************************
711 \subsection{Actually creating the imported names}
713 *********************************************************
716 getIfaceDeclNames :: RdrNameIE -> RdrIfaceDecl
717 -> RnM_IInfo s (Bag RnName, -- values
718 Bag RnName, -- tycons/classes
719 Bag (RnName,ExportFlag)) -- import flags
721 getIfaceDeclNames ie (ValSig val src_loc _)
722 = newImportedName False src_loc Nothing Nothing val `thenRn` \ val_name ->
723 returnRn (unitBag (RnName val_name),
725 unitBag (RnName val_name, ExportAll))
727 getIfaceDeclNames ie (TypeSig tycon src_loc _)
728 = newImportedName True src_loc Nothing Nothing tycon `thenRn` \ tycon_name ->
730 unitBag (RnSyn tycon_name),
731 unitBag (RnSyn tycon_name, ExportAll))
733 getIfaceDeclNames ie (NewTypeSig tycon con src_loc _)
734 = newImportedName True src_loc Nothing Nothing tycon `thenRn` \ tycon_name ->
735 newImportedName False src_loc (Just (nameExportFlag tycon_name))
736 (Just (nameImportFlag tycon_name))
737 con `thenRn` \ con_name ->
738 returnRn (if imp_all (imp_flag ie) then
739 unitBag (RnConstr con_name tycon_name)
742 unitBag (RnData tycon_name [con_name] []),
743 unitBag (RnData tycon_name [con_name] [], imp_flag ie))
745 getIfaceDeclNames ie (DataSig tycon cons fields src_loc _)
746 = newImportedName True src_loc Nothing Nothing tycon `thenRn` \ tycon_name ->
748 map_me = mapRn (newImportedName False src_loc
749 (Just (nameExportFlag tycon_name))
750 (Just (nameImportFlag tycon_name)))
752 map_me cons `thenRn` \ con_names ->
753 map_me fields `thenRn` \ field_names ->
755 rn_tycon = RnData tycon_name con_names field_names
756 rn_constrs = [ RnConstr name tycon_name | name <- con_names ]
757 rn_fields = [ RnField name tycon_name | name <- field_names ]
759 returnRn (if imp_all (imp_flag ie) then
760 listToBag rn_constrs `unionBags` listToBag rn_fields
764 unitBag (rn_tycon, imp_flag ie))
766 getIfaceDeclNames ie (ClassSig cls ops src_loc _)
767 = newImportedName True src_loc Nothing Nothing cls `thenRn` \ cls_name ->
768 mapRn (newImportedName False src_loc (Just (nameExportFlag cls_name))
769 (Just (nameImportFlag cls_name)))
770 ops `thenRn` \ op_names ->
771 returnRn (if imp_all (imp_flag ie) then
772 listToBag (map (\ n -> RnClassOp n cls_name) op_names)
775 unitBag (RnClass cls_name op_names),
776 unitBag (RnClass cls_name op_names, imp_flag ie))
779 imp_all ExportAll = True
782 imp_flag (IEThingAbs _) = ExportAbs
783 imp_flag (IEThingAll _) = ExportAll
784 imp_flag (IEThingWith _ _) = ExportAll
787 *********************************************************
789 \subsection{Creating a new imported name}
791 *********************************************************
794 newImportedName :: Bool -- True => tycon or class
796 -> Maybe ExportFlag -- maybe export flag
797 -> Maybe ExportFlag -- maybe import flag
798 -> RdrName -- orig name
801 newImportedName tycon_or_class locn maybe_exp maybe_imp rdr
802 = getExtraRn `thenRn` \ ((_,b_keys,exp_fn,occ_fn),done_vals,done_tcs,imp_fn) ->
803 case if tycon_or_class
804 then lookupFM done_tcs (moduleNamePair rdr)
805 else lookupFM done_vals (moduleNamePair rdr)
807 Just rn -> returnRn (getName rn)
809 rnGetUnique `thenRn` \ u ->
811 str_mod = case rdr of { Qual m n -> (n,m); Unqual n -> (n,pRELUDE) }
813 uniq = case lookupFM b_keys str_mod of
817 exp = case maybe_exp of
821 imp = case maybe_imp of
825 (imp_flag, imp_locs) = imp_fn n
827 n = mkImportedName uniq rdr imp locn imp_locs exp (occ_fn n) -- NB: two "n"s
833 globalDupNamesErr rdr rns sty
834 = ppAboves (message : map pp_dup rns)
836 message = ppBesides [ppStr "multiple declarations of `", pprNonSym sty rdr, ppStr "'"]
838 pp_dup rn = addShortErrLocLine (get_loc rn) (\ sty ->
839 ppCat [pp_descrip rn, pprNonSym sty rn]) sty
841 get_loc rn = case getImpLocs rn of
845 pp_descrip (RnName _) = ppStr "as a value:"
846 pp_descrip (RnSyn _) = ppStr "as a type synonym:"
847 pp_descrip (RnData _ _ _) = ppStr "as a data type:"
848 pp_descrip (RnConstr _ _) = ppStr "as a data constructor:"
849 pp_descrip (RnField _ _) = ppStr "as a record field:"
850 pp_descrip (RnClass _ _) = ppStr "as a class:"
851 pp_descrip (RnClassOp _ _) = ppStr "as a class method:"
854 dupImportWarn (ImportDecl m1 _ _ _ locn1 : dup_imps) sty
855 = ppAboves (item1 : map dup_item dup_imps)
857 item1 = addShortWarnLocLine locn1 (\ sty ->
858 ppCat [ppStr "multiple imports from module", ppPStr m1]) sty
860 dup_item (ImportDecl m _ _ _ locn)
861 = addShortWarnLocLine locn (\ sty ->
862 ppCat [ppStr "here was another import from module", ppPStr m]) sty
864 qualPreludeImportWarn (ImportDecl m _ _ _ locn)
865 = addShortWarnLocLine locn (\ sty ->
866 ppCat [ppStr "qualified import of prelude module", ppPStr m])
868 dupQualImportErr ((q1,ImportDecl _ _ _ _ locn1):dup_quals) sty
869 = ppAboves (item1 : map dup_item dup_quals)
871 item1 = addShortErrLocLine locn1 (\ sty ->
872 ppCat [ppStr "multiple imports (from different modules) with same qualified name", ppPStr q1]) sty
874 dup_item (q,ImportDecl _ _ _ _ locn)
875 = addShortErrLocLine locn (\ sty ->
876 ppCat [ppStr "here was another import with qualified name", ppPStr q]) sty
878 unknownImpSpecErr ie imp_mod locn
879 = addShortErrLocLine locn (\ sty ->
880 ppBesides [ppStr "module ", ppPStr imp_mod, ppStr " does not export `", ppr sty (ie_name ie), ppStr "'"])
882 duplicateImpSpecErr ie imp_mod locn
883 = addShortErrLocLine locn (\ sty ->
884 ppBesides [ppStr "`", ppr sty (ie_name ie), ppStr "' already seen in import list"])
886 allWhenSynImpSpecWarn n imp_mod locn
887 = addShortWarnLocLine locn (\ sty ->
888 ppBesides [ppStr "type synonym `", ppr sty n, ppStr "' should not be imported with (..)"])
890 allWhenAbsImpSpecErr n imp_mod locn
891 = addShortErrLocLine locn (\ sty ->
892 ppBesides [ppStr "module ", ppPStr imp_mod, ppStr " only exports `", ppr sty n, ppStr "' abstractly"])
894 withWhenAbsImpSpecErr n imp_mod locn
895 = addShortErrLocLine locn (\ sty ->
896 ppBesides [ppStr "module ", ppPStr imp_mod, ppStr " only exports `", ppr sty n, ppStr "' abstractly"])
898 withImpSpecErr str n has ns imp_mod locn
899 = addErrLoc locn "" (\ sty ->
900 ppAboves [ ppBesides [ppStr "inconsistent list of", ppStr str, ppStr "in import list for `", ppr sty n, ppStr "'"],
901 ppCat [ppStr " expected:", ppInterleave ppComma (map (ppr sty) has)],
902 ppCat [ppStr " found: ", ppInterleave ppComma (map (ppr sty) ns)] ])
904 dupFieldErr con locn (dup:rest)
905 = addShortErrLocLine locn (\ sty ->
906 ppBesides [ppStr "record field `", ppr sty dup, ppStr "declared multiple times in `", ppr sty con, ppStr "'"])