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, negateNameWarn )
26 import ParseUtils ( ParsedIface(..), RdrIfaceDecl(..), RdrIfaceInst )
29 import Bag ( emptyBag, unitBag, consBag, snocBag, unionBags,
30 unionManyBags, mapBag, filterBag, listToBag, bagToList )
31 import CmdLineOpts ( opt_NoImplicitPrelude )
32 import ErrUtils ( Error(..), Warning(..), addErrLoc, addShortErrLocLine )
33 import FiniteMap ( emptyFM, addListToFM, lookupFM, fmToList, eltsFM, delListFromFM )
35 import Maybes ( maybeToBool, catMaybes, MaybeErr(..) )
36 import Name ( RdrName(..), Name, isQual, mkTopLevName, origName,
37 mkImportedName, nameExportFlag, nameImportFlag,
38 getLocalName, getSrcLoc, getImpLocs, moduleNamePair,
39 pprNonSym, isLexCon, isRdrLexCon, ExportFlag(..)
41 import PrelInfo ( BuiltinNames(..), BuiltinKeys(..) )
42 import PrelMods ( fromPrelude, pRELUDE )
44 import SrcLoc ( SrcLoc, mkBuiltinSrcLoc )
45 import TyCon ( tyConDataCons )
46 import UniqFM ( emptyUFM, addListToUFM_C, lookupUFM )
47 import UniqSupply ( splitUniqSupply )
48 import Util ( isIn, assoc, cmpPString, sortLt, removeDups,
49 equivClasses, panic, assertPanic )
54 type GlobalNameInfo = (BuiltinNames,
56 Name -> ExportFlag, -- export flag
57 Name -> [RdrName]) -- occurence names
59 type RnM_Info s r = RnMonad GlobalNameInfo s r
67 [Module], -- directly imported modules
68 Bag (Module,RnName), -- unqualified imports from module
69 Bag RenamedFixityDecl, -- imported fixity decls
73 getGlobalNames iface_cache info us
74 (HsModule mod _ _ imports _ ty_decls _ cls_decls _ _ _ binds _ _)
75 = case initRn True mod emptyRnEnv us1
77 getSourceNames ty_decls cls_decls binds)
78 of { ((src_vals, src_tcs), src_errs, src_warns) ->
80 doImportDecls iface_cache info us2 imports >>=
81 \ (imp_vals, imp_tcs, imp_mods, unqual_imps, imp_fixes, imp_errs, imp_warns) ->
84 unqual_vals = map (\rn -> (Unqual (getLocalName rn), rn)) (bagToList src_vals)
85 unqual_tcs = map (\rn -> (Unqual (getLocalName rn), rn)) (bagToList src_tcs)
87 (src_env, src_dups) = extendGlobalRnEnv emptyRnEnv unqual_vals unqual_tcs
88 (all_env, imp_dups) = extendGlobalRnEnv src_env (bagToList imp_vals) (bagToList imp_tcs)
90 -- remove dups of the same imported thing
91 diff_imp_dups = filterBag diff_orig imp_dups
92 diff_orig (_,rn1,rn2) = origName rn1 /= origName rn2
94 all_dups = bagToList (src_dups `unionBags` diff_imp_dups)
95 dup_errs = map dup_err (equivClasses cmp_rdr all_dups)
96 cmp_rdr (rdr1,_,_) (rdr2,_,_) = cmp rdr1 rdr2
97 dup_err ((rdr,rn1,rn2):rest) = globalDupNamesErr rdr (rn1:rn2: [rn|(_,_,rn)<-rest])
99 all_errs = src_errs `unionBags` imp_errs `unionBags` listToBag dup_errs
100 all_warns = src_warns `unionBags` imp_warns
102 return (all_env, imp_mods, unqual_imps, imp_fixes, all_errs, all_warns)
105 (us1, us2) = splitUniqSupply us
108 *********************************************************
110 \subsection{Top-level source names}
112 *********************************************************
117 -> [RdrNameClassDecl]
119 -> RnM_Info s (Bag RnName, -- values
120 Bag RnName) -- tycons/classes
122 getSourceNames ty_decls cls_decls binds
123 = mapAndUnzip3Rn getTyDeclNames ty_decls `thenRn` \ (tycon_s, constrs_s, fields_s) ->
124 mapAndUnzipRn getClassNames cls_decls `thenRn` \ (cls_s, cls_ops_s) ->
125 getTopBindsNames binds `thenRn` \ bind_names ->
126 returnRn (unionManyBags constrs_s `unionBags`
127 unionManyBags fields_s `unionBags`
128 unionManyBags cls_ops_s `unionBags` bind_names,
129 listToBag tycon_s `unionBags` listToBag cls_s)
132 getTyDeclNames :: RdrNameTyDecl
133 -> RnM_Info s (RnName, Bag RnName, Bag RnName) -- tycon, constrs and fields
135 getTyDeclNames (TyData _ tycon _ condecls _ _ src_loc)
136 = newGlobalName src_loc Nothing tycon `thenRn` \ tycon_name ->
137 getConFieldNames (Just (nameExportFlag tycon_name)) emptyBag emptyBag emptyFM
138 condecls `thenRn` \ (con_names, field_names) ->
140 rn_tycon = RnData tycon_name con_names field_names
141 rn_constrs = [ RnConstr name tycon_name | name <- con_names]
142 rn_fields = [ RnField name tycon_name | name <- field_names]
144 returnRn (rn_tycon, listToBag rn_constrs, listToBag rn_fields)
146 getTyDeclNames (TyNew _ tycon _ [NewConDecl con _ con_loc] _ _ src_loc)
147 = newGlobalName src_loc Nothing tycon `thenRn` \ tycon_name ->
148 newGlobalName con_loc (Just (nameExportFlag tycon_name)) con
149 `thenRn` \ con_name ->
150 returnRn (RnData tycon_name [con_name] [],
151 unitBag (RnConstr con_name tycon_name),
154 getTyDeclNames (TySynonym tycon _ _ src_loc)
155 = newGlobalName src_loc Nothing tycon `thenRn` \ tycon_name ->
156 returnRn (RnSyn tycon_name, emptyBag, emptyBag)
159 getConFieldNames exp constrs fields have []
160 = returnRn (bagToList constrs, bagToList fields)
162 getConFieldNames exp constrs fields have (ConDecl con _ src_loc : rest)
163 = newGlobalName src_loc exp con `thenRn` \ con_name ->
164 getConFieldNames exp (constrs `snocBag` con_name) fields have rest
166 getConFieldNames exp constrs fields have (ConOpDecl _ con _ src_loc : rest)
167 = newGlobalName src_loc exp con `thenRn` \ con_name ->
168 getConFieldNames exp (constrs `snocBag` con_name) fields have rest
170 getConFieldNames exp constrs fields have (RecConDecl con fielddecls src_loc : rest)
171 = mapRn (addErrRn . dupFieldErr con src_loc) dups `thenRn_`
172 newGlobalName src_loc exp con `thenRn` \ con_name ->
173 mapRn (newGlobalName src_loc exp) new_fields `thenRn` \ field_names ->
175 all_constrs = constrs `snocBag` con_name
176 all_fields = fields `unionBags` listToBag field_names
178 getConFieldNames exp all_constrs all_fields new_have rest
180 (uniq_fields, dups) = removeDups cmp (concat (map fst fielddecls))
181 new_fields = filter (not . maybeToBool . lookupFM have) uniq_fields
182 new_have = addListToFM have (zip new_fields (repeat ()))
184 getClassNames :: RdrNameClassDecl
185 -> RnM_Info s (RnName, Bag RnName) -- class and class ops
187 getClassNames (ClassDecl _ cname _ sigs _ _ src_loc)
188 = newGlobalName src_loc Nothing cname `thenRn` \ class_name ->
189 getClassOpNames (Just (nameExportFlag class_name))
190 sigs `thenRn` \ op_names ->
191 returnRn (RnClass class_name op_names,
192 listToBag (map (\ n -> RnClassOp n class_name) op_names))
194 getClassOpNames exp []
196 getClassOpNames exp (ClassOpSig op _ _ src_loc : sigs)
197 = newGlobalName src_loc exp op `thenRn` \ op_name ->
198 getClassOpNames exp sigs `thenRn` \ op_names ->
199 returnRn (op_name : op_names)
200 getClassOpNames exp (_ : sigs)
201 = getClassOpNames exp sigs
204 *********************************************************
206 \subsection{Bindings}
208 *********************************************************
211 getTopBindsNames :: RdrNameHsBinds
212 -> RnM_Info s (Bag RnName)
214 getTopBindsNames binds = doBinds binds
216 doBinds EmptyBinds = returnRn emptyBag
217 doBinds (SingleBind bind) = doBind bind
218 doBinds (BindWith bind sigs) = doBind bind
219 doBinds (ThenBinds binds1 binds2)
220 = andRn unionBags (doBinds binds1) (doBinds binds2)
222 doBind EmptyBind = returnRn emptyBag
223 doBind (NonRecBind mbind) = doMBinds mbind
224 doBind (RecBind mbind) = doMBinds mbind
226 doMBinds EmptyMonoBinds = returnRn emptyBag
227 doMBinds (PatMonoBind pat grhss_and_binds locn) = doPat locn pat
228 doMBinds (FunMonoBind p_name _ _ locn) = doName locn p_name
229 doMBinds (AndMonoBinds mbinds1 mbinds2)
230 = andRn unionBags (doMBinds mbinds1) (doMBinds mbinds2)
233 = mapRn (doPat locn) pats `thenRn` \ pats_s ->
234 returnRn (unionManyBags pats_s)
236 doPat locn WildPatIn = returnRn emptyBag
237 doPat locn (LitPatIn _) = returnRn emptyBag
238 doPat locn (LazyPatIn pat) = doPat locn pat
239 doPat locn (VarPatIn var) = doName locn var
240 doPat locn (NegPatIn pat) = doPat locn pat
241 doPat locn (ParPatIn pat) = doPat locn pat
242 doPat locn (ListPatIn pats) = doPats locn pats
243 doPat locn (TuplePatIn pats) = doPats locn pats
244 doPat locn (ConPatIn name pats) = doPats locn pats
245 doPat locn (ConOpPatIn p1 op p2)
246 = andRn unionBags (doPat locn p1) (doPat locn p2)
247 doPat locn (AsPatIn as_name pat)
248 = andRn unionBags (doName locn as_name) (doPat locn pat)
249 doPat locn (RecPatIn name fields)
250 = mapRn (doField locn) fields `thenRn` \ fields_s ->
251 returnRn (unionManyBags fields_s)
253 doField locn (_, pat, _) = doPat locn pat
256 = newGlobalName locn Nothing rdr `thenRn` \ name ->
257 returnRn (unitBag (RnName name))
260 *********************************************************
262 \subsection{Creating a new global name}
264 *********************************************************
267 newGlobalName :: SrcLoc -> Maybe ExportFlag
268 -> RdrName -> RnM_Info s Name
270 -- ToDo: b_names and b_keys being defined in this module !!!
272 newGlobalName locn maybe_exp rdr
273 = getExtraRn `thenRn` \ (_,b_keys,exp_fn,occ_fn) ->
274 getModuleRn `thenRn` \ mod ->
275 rnGetUnique `thenRn` \ u ->
280 Unqual n -> case (lookupFM b_keys n) of
282 Just (key,_) -> (key, n)
284 orig = if fromPrelude mod
286 else (Qual mod unqual)
288 exp = case maybe_exp of
292 n = mkTopLevName uniq orig locn exp (occ_fn n)
294 addWarnIfRn (rdr == Unqual SLIT("negate")) (negateNameWarn (rdr, locn)) `thenRn_`
295 addErrIfRn (isQual rdr) (qualNameErr "name in definition" (rdr, locn)) `thenRn_`
299 *********************************************************
301 \subsection{Imported names}
303 *********************************************************
306 type ImportNameInfo = (GlobalNameInfo,
307 FiniteMap (Module,FAST_STRING) RnName, -- values imported so far
308 FiniteMap (Module,FAST_STRING) RnName, -- tycons/classes imported so far
309 Name -> (ExportFlag, [SrcLoc])) -- import flag and src locns
311 type RnM_IInfo s r = RnMonad ImportNameInfo s r
315 -> GlobalNameInfo -- builtin and knot name info
317 -> [RdrNameImportDecl] -- import declarations
318 -> IO (Bag (RdrName,RnName), -- imported values in scope
319 Bag (RdrName,RnName), -- imported tycons/classes in scope
320 [Module], -- directly imported modules
321 Bag (Module,RnName), -- unqualified import from module
322 Bag RenamedFixityDecl, -- fixity info for imported names
326 doImportDecls iface_cache g_info us src_imps
327 = fixIO ( \ ~(_, _, _, _, _, _, rec_imp_stuff) ->
329 rec_imp_fm = addListToUFM_C add_stuff emptyUFM (bagToList rec_imp_stuff)
330 add_stuff (imp1,locns1) (imp2,locns2) = (lubExportFlag imp1 imp2, locns1 `unionBags` locns2)
332 rec_imp_fn :: Name -> (ExportFlag, [SrcLoc])
333 rec_imp_fn n = case lookupUFM rec_imp_fm n of
334 Nothing -> panic "RnNames:rec_imp_fn"
335 Just (flag, locns) -> (flag, bagToList locns)
337 i_info = (g_info, emptyFM, emptyFM, rec_imp_fn)
339 doImports iface_cache i_info us all_imps
340 ) >>= \ (vals, tcs, unquals, fixes, errs, warns, _) ->
342 return (vals, tcs, imp_mods, unquals, fixes,
343 errs, imp_warns `unionBags` warns)
345 (src_qprels, ok_imps) = partition qual_prel src_imps
346 the_imps = ok_imps ++ prel_imp
347 all_imps = the_imps ++ qprel_imp
349 qual_prel (ImportDecl mod qual imp_as _ _)
350 = fromPrelude mod && qual && not (maybeToBool imp_as)
352 explicit_prelude_import
353 = null [() | (ImportDecl mod qual _ _ _) <- ok_imps, fromPrelude mod]
355 qprel_imp = if opt_NoImplicitPrelude
356 then [{-the flag really means it: *NO* implicit "import Prelude" -}]
357 else [ImportDecl pRELUDE True Nothing Nothing prel_loc]
359 prel_imp = if not explicit_prelude_import || opt_NoImplicitPrelude
361 [{- no "import Prelude" -}]
363 [ImportDecl pRELUDE False Nothing Nothing prel_loc]
365 prel_loc = mkBuiltinSrcLoc
367 (uniq_imps, imp_dups) = removeDups cmp_mod the_imps
368 cmp_mod (ImportDecl m1 _ _ _ _) (ImportDecl m2 _ _ _ _) = cmpPString m1 m2
370 imp_mods = [ mod | ImportDecl mod _ _ _ _ <- uniq_imps ]
371 imp_warns = listToBag (map dupImportWarn imp_dups)
373 listToBag (map qualPreludeImportWarn src_qprels)
376 doImports iface_cache i_info us []
377 = return (emptyBag, emptyBag, emptyBag, emptyBag, emptyBag, emptyBag, emptyBag)
378 doImports iface_cache i_info@(g_info,done_vals,done_tcs,imp_fn) us (imp:imps)
379 = doImport iface_cache i_info us1 imp
380 >>= \ (vals1, tcs1, unquals1, fixes1, errs1, warns1, imps1) ->
382 new_vals = [ (moduleNamePair rn, rn) | (_,rn) <- bagToList vals1,
383 not (maybeToBool (lookupFM done_vals (moduleNamePair rn))) ]
384 -- moduleNamePair computed twice
385 ext_vals = addListToFM done_vals new_vals
387 new_tcs = [ (moduleNamePair rn, rn) | (_,rn) <- bagToList tcs1,
388 not (maybeToBool (lookupFM done_tcs (moduleNamePair rn))) ]
389 ext_tcs = addListToFM done_tcs new_tcs
391 doImports iface_cache (g_info,ext_vals,ext_tcs,imp_fn) us2 imps
392 >>= \ (vals2, tcs2, unquals2, fixes2, errs2, warns2, imps2) ->
393 return (vals1 `unionBags` vals2,
394 tcs1 `unionBags` tcs2,
395 unquals1 `unionBags` unquals2,
396 fixes1 `unionBags` fixes2,
397 errs1 `unionBags` errs2,
398 warns1 `unionBags` warns2,
399 imps1 `unionBags` imps2)
401 (us1, us2) = splitUniqSupply us
404 doImport :: IfaceCache
408 -> IO (Bag (RdrName,RnName), -- values
409 Bag (RdrName,RnName), -- tycons/classes
410 Bag (Module,RnName), -- unqual imports
411 Bag RenamedFixityDecl,
414 Bag (RnName,(ExportFlag,Bag SrcLoc))) -- import flags and src locs
416 doImport iface_cache info us (ImportDecl mod qual maybe_as maybe_spec src_loc)
417 = cachedIface iface_cache mod >>= \ maybe_iface ->
420 return (emptyBag, emptyBag, emptyBag, emptyBag,
421 unitBag err, emptyBag, emptyBag)
424 (b_vals, b_tcs, maybe_spec') = getBuiltins info mod maybe_spec
425 (ies, chk_ies, get_errs) = getOrigIEs iface maybe_spec'
427 doOrigIEs iface_cache info mod src_loc us ies
428 >>= \ (ie_vals, ie_tcs, imp_flags, errs, warns) ->
429 accumulate (map (checkOrigIE iface_cache) chk_ies)
430 >>= \ chk_errs_warns ->
431 accumulate (map (getFixityDecl iface_cache) (bagToList ie_vals))
432 >>= \ fix_maybes_errs ->
434 (chk_errs, chk_warns) = unzip chk_errs_warns
435 (fix_maybes, fix_errs) = unzip fix_maybes_errs
437 final_vals = mapBag fst_occ b_vals `unionBags` mapBag pair_occ ie_vals
438 final_tcs = mapBag fst_occ b_tcs `unionBags` mapBag pair_occ ie_tcs
440 unquals = if qual then emptyBag
441 else mapBag pair_as (ie_vals `unionBags` ie_tcs)
443 final_fixes = listToBag (catMaybes fix_maybes)
445 final_errs = mapBag (\ err -> err mod src_loc) (unionManyBags (get_errs:chk_errs))
446 `unionBags` errs `unionBags` unionManyBags fix_errs
447 final_warns = mapBag (\ warn -> warn mod src_loc) (unionManyBags chk_warns)
449 imp_stuff = mapBag (\ (n,imp) -> (n,(imp,unitBag src_loc))) imp_flags
451 return (final_vals, final_tcs, unquals, final_fixes,
452 final_errs, final_warns, imp_stuff)
454 as_mod = case maybe_as of {Nothing -> mod; Just as_this -> as_this}
455 mk_occ str = if qual then Qual as_mod str else Unqual str
457 fst_occ (str, rn) = (mk_occ str, rn)
458 pair_occ rn = (mk_occ (getLocalName rn), rn)
459 pair_as rn = (as_mod, rn)
462 getBuiltins _ mod maybe_spec
463 | not (fromPrelude mod)
464 = (emptyBag, emptyBag, maybe_spec)
466 getBuiltins (((b_val_names,b_tc_names),_,_,_),_,_,_) mod maybe_spec
468 Nothing -> (all_vals, all_tcs, Nothing)
470 Just (True, ies) -> -- hiding does not work for builtin names
471 (all_vals, all_tcs, maybe_spec)
473 Just (False, ies) -> let
474 (vals,tcs,ies_left) = do_builtin ies
476 (vals, tcs, Just (False, ies_left))
478 all_vals = do_all_builtin (fmToList b_val_names)
479 all_tcs = do_all_builtin (fmToList b_tc_names)
481 do_all_builtin [] = emptyBag
482 do_all_builtin ((str,rn):rest)
483 = (str, rn) `consBag` do_all_builtin rest
485 do_builtin [] = (emptyBag,emptyBag,[])
487 = let str = unqual_str (ie_name ie)
489 case (lookupFM b_tc_names str) of -- NB: we favour the tycon/class FM...
490 Just rn -> case (ie,rn) of
491 (IEThingAbs _, WiredInTyCon tc)
492 -> (vals, (str, rn) `consBag` tcs, ies_left)
493 (IEThingAll _, WiredInTyCon tc)
494 -> (listToBag (map (\ id -> (getLocalName id, WiredInId id))
497 (str,rn) `consBag` tcs, ies_left)
498 _ -> panic "importing builtin names (1)"
501 case (lookupFM b_val_names str) of
502 Nothing -> (vals, tcs, ie:ies_left)
503 Just rn -> case (ie,rn) of
504 (IEVar _, WiredInId _)
505 -> ((str, rn) `consBag` vals, tcs, ies_left)
506 _ -> panic "importing builtin names (2)"
508 (vals, tcs, ies_left) = do_builtin ies
511 getOrigIEs (ParsedIface _ _ _ _ _ exps _ _ _ _ _ _) Nothing -- import all
512 = (map mkAllIE (eltsFM exps), [], emptyBag)
514 getOrigIEs (ParsedIface _ _ _ _ _ exps _ _ _ _ _ _) (Just (True, ies)) -- import hiding
515 = (map mkAllIE (eltsFM exps_left), found_ies, errs)
517 (found_ies, errs) = lookupIEs exps ies
518 exps_left = delListFromFM exps (map (getLocalName.ie_name.fst) found_ies)
520 getOrigIEs (ParsedIface _ _ _ _ _ exps _ _ _ _ _ _) (Just (False, ies)) -- import these
521 = (map fst found_ies, found_ies, errs)
523 (found_ies, errs) = lookupIEs exps ies
526 mkAllIE (orig,ExportAbs)
527 = ASSERT(isLexCon (getLocalName orig))
529 mkAllIE (orig, ExportAll)
530 | isLexCon (getLocalName orig)
538 lookupIEs exps (ie:ies)
539 = case lookupFM exps (unqual_str (ie_name ie)) of
541 (orig_ies, unknownImpSpecErr ie `consBag` errs)
543 (orig_ie orig flag ie ++ orig_ies,
544 adderr_if (seen_ie orig orig_ies) (duplicateImpSpecErr ie) errs)
546 (orig_ies, errs) = lookupIEs exps ies
548 orig_ie orig flag (IEVar n) = [(IEVar orig, flag)]
549 orig_ie orig flag (IEThingAbs n) = [(IEThingAbs orig, flag)]
550 orig_ie orig flag (IEThingAll n) = [(IEThingAll orig, flag)]
551 orig_ie orig flag (IEThingWith n ns) = [(IEThingWith orig ns, flag)]
553 seen_ie orig seen_ies = any (\ (ie,_) -> orig == ie_name ie) seen_ies
556 doOrigIEs iface_cache info mod src_loc us []
557 = return (emptyBag,emptyBag,emptyBag,emptyBag,emptyBag)
559 doOrigIEs iface_cache info mod src_loc us (ie:ies)
560 = doOrigIE iface_cache info mod src_loc us1 ie
561 >>= \ (vals1, tcs1, imps1, errs1, warns1) ->
562 doOrigIEs iface_cache info mod src_loc us2 ies
563 >>= \ (vals2, tcs2, imps2, errs2, warns2) ->
564 return (vals1 `unionBags` vals2,
565 tcs1 `unionBags` tcs2,
566 imps1 `unionBags` imps2,
567 errs1 `unionBags` errs2,
568 warns1 `unionBags` warns2)
570 (us1, us2) = splitUniqSupply us
572 doOrigIE iface_cache info mod src_loc us ie
573 = with_decl iface_cache (ie_name ie)
574 (\ err -> (emptyBag, emptyBag, emptyBag, unitBag err, emptyBag))
575 (\ decl -> case initRn True mod emptyRnEnv us
577 pushSrcLocRn src_loc $
578 getIfaceDeclNames ie decl)
580 ((vals, tcs, imps), errs, warns) -> (vals, tcs, imps, errs, warns))
582 checkOrigIE iface_cache (IEThingAll n, ExportAbs)
583 = with_decl iface_cache n
584 (\ err -> (unitBag (\ mod locn -> err), emptyBag))
585 (\ decl -> case decl of
586 TypeSig _ _ _ -> (emptyBag, unitBag (allWhenSynImpSpecWarn n))
587 other -> (unitBag (allWhenAbsImpSpecErr n), emptyBag))
589 checkOrigIE iface_cache (IEThingWith n ns, ExportAbs)
590 = return (unitBag (withWhenAbsImpSpecErr n), emptyBag)
592 checkOrigIE iface_cache (IEThingWith n ns, ExportAll)
593 = with_decl iface_cache n
594 (\ err -> (unitBag (\ mod locn -> err), emptyBag))
595 (\ decl -> case decl of
596 NewTypeSig _ con _ _ -> (check_with "constructrs" [con] ns, emptyBag)
597 DataSig _ cons fields _ _ -> (check_with "constructrs (and fields)" (cons++fields) ns, emptyBag)
598 ClassSig _ ops _ _ -> (check_with "class ops" ops ns, emptyBag))
600 check_with str has rdrs
601 | sortLt (<) (map getLocalName has) == sortLt (<) (map unqual_str rdrs)
604 = unitBag (withImpSpecErr str n has rdrs)
606 checkOrigIE iface_cache other
607 = return (emptyBag, emptyBag)
610 with_decl iface_cache n do_err do_decl
611 = cachedDecl iface_cache (isRdrLexCon n) n >>= \ maybe_decl ->
613 Failed err -> return (do_err err)
614 Succeeded decl -> return (do_decl decl)
617 getFixityDecl iface_cache rn
619 (mod, str) = moduleNamePair rn
621 cachedIface iface_cache mod >>= \ maybe_iface ->
624 return (Nothing, unitBag err)
625 Succeeded (ParsedIface _ _ _ _ _ _ _ fixes _ _ _ _) ->
626 case lookupFM fixes str of
627 Nothing -> return (Nothing, emptyBag)
628 Just (InfixL _ i) -> return (Just (InfixL rn i), emptyBag)
629 Just (InfixR _ i) -> return (Just (InfixR rn i), emptyBag)
630 Just (InfixN _ i) -> return (Just (InfixN rn i), emptyBag)
632 ie_name (IEVar n) = n
633 ie_name (IEThingAbs n) = n
634 ie_name (IEThingAll n) = n
635 ie_name (IEThingWith n _) = n
637 unqual_str (Unqual str) = str
638 unqual_str q@(Qual _ _) = panic "unqual_str"
640 adderr_if True err errs = err `consBag` errs
641 adderr_if False err errs = errs
644 *********************************************************
646 \subsection{Actually creating the imported names}
648 *********************************************************
651 getIfaceDeclNames :: RdrNameIE -> RdrIfaceDecl
652 -> RnM_IInfo s (Bag RnName, -- values
653 Bag RnName, -- tycons/classes
654 Bag (RnName,ExportFlag)) -- import flags
656 getIfaceDeclNames ie (ValSig val src_loc _)
657 = newImportedName False src_loc Nothing Nothing val `thenRn` \ val_name ->
658 returnRn (unitBag (RnName val_name),
660 unitBag (RnName val_name, ExportAll))
662 getIfaceDeclNames ie (TypeSig tycon src_loc _)
663 = newImportedName True src_loc Nothing Nothing tycon `thenRn` \ tycon_name ->
665 unitBag (RnSyn tycon_name),
666 unitBag (RnSyn tycon_name, ExportAll))
668 getIfaceDeclNames ie (NewTypeSig tycon con src_loc _)
669 = newImportedName True src_loc Nothing Nothing tycon `thenRn` \ tycon_name ->
670 newImportedName False src_loc (Just (nameExportFlag tycon_name))
671 (Just (nameImportFlag tycon_name))
672 con `thenRn` \ con_name ->
673 returnRn (if imp_all (imp_flag ie) then
674 unitBag (RnConstr con_name tycon_name)
677 unitBag (RnData tycon_name [con_name] []),
678 unitBag (RnData tycon_name [con_name] [], imp_flag ie))
680 getIfaceDeclNames ie (DataSig tycon cons fields src_loc _)
681 = newImportedName True src_loc Nothing Nothing tycon `thenRn` \ tycon_name ->
682 mapRn (newImportedName False src_loc (Just (nameExportFlag tycon_name))
683 (Just (nameImportFlag tycon_name)))
684 cons `thenRn` \ con_names ->
685 mapRn (newImportedName False src_loc (Just (nameExportFlag tycon_name))
686 (Just (nameImportFlag tycon_name)))
687 fields `thenRn` \ field_names ->
689 rn_tycon = RnData tycon_name con_names field_names
690 rn_constrs = [ RnConstr name tycon_name | name <- con_names ]
691 rn_fields = [ RnField name tycon_name | name <- field_names ]
693 returnRn (if imp_all (imp_flag ie) then
694 listToBag rn_constrs `unionBags` listToBag rn_fields
698 unitBag (rn_tycon, imp_flag ie))
700 getIfaceDeclNames ie (ClassSig cls ops src_loc _)
701 = newImportedName True src_loc Nothing Nothing cls `thenRn` \ cls_name ->
702 mapRn (newImportedName False src_loc (Just (nameExportFlag cls_name))
703 (Just (nameImportFlag cls_name)))
704 ops `thenRn` \ op_names ->
705 returnRn (if imp_all (imp_flag ie) then
706 listToBag (map (\ n -> RnClassOp n cls_name) op_names)
709 unitBag (RnClass cls_name op_names),
710 unitBag (RnClass cls_name op_names, imp_flag ie))
713 imp_all ExportAll = True
716 imp_flag (IEThingAbs _) = ExportAbs
717 imp_flag (IEThingAll _) = ExportAll
718 imp_flag (IEThingWith _ _) = ExportAll
721 *********************************************************
723 \subsection{Creating a new imported name}
725 *********************************************************
728 newImportedName :: Bool -- True => tycon or class
730 -> Maybe ExportFlag -- maybe export flag
731 -> Maybe ExportFlag -- maybe import flag
732 -> RdrName -- orig name
735 newImportedName tycon_or_class locn maybe_exp maybe_imp rdr
736 = getExtraRn `thenRn` \ ((_,b_keys,exp_fn,occ_fn),done_vals,done_tcs,imp_fn) ->
737 case if tycon_or_class
738 then lookupFM done_tcs (moduleNamePair rdr)
739 else lookupFM done_vals (moduleNamePair rdr)
741 Just rn -> returnRn (getName rn)
743 rnGetUnique `thenRn` \ u ->
747 Unqual n -> case lookupFM b_keys n of
751 exp = case maybe_exp of
755 imp = case maybe_imp of
759 (imp_flag, imp_locs) = imp_fn n
761 n = mkImportedName uniq rdr imp locn imp_locs exp (occ_fn n)
767 globalDupNamesErr rdr rns sty
768 = ppAboves (message : map pp_dup rns)
770 message = ppBesides [ppStr "multiple declarations of `", pprNonSym sty rdr, ppStr "'"]
772 pp_dup rn = addShortErrLocLine (get_loc rn) (\ sty ->
773 ppBesides [pp_descrip rn, pprNonSym sty rn]) sty
775 get_loc rn = case getImpLocs rn of
779 pp_descrip (RnName _) = ppStr "a value"
780 pp_descrip (RnSyn _) = ppStr "a type synonym"
781 pp_descrip (RnData _ _ _) = ppStr "a data type"
782 pp_descrip (RnConstr _ _) = ppStr "a data constructor"
783 pp_descrip (RnField _ _) = ppStr "a record field"
784 pp_descrip (RnClass _ _) = ppStr "a class"
785 pp_descrip (RnClassOp _ _) = ppStr "a class method"
788 dupImportWarn (ImportDecl m1 _ _ _ locn1 : dup_imps) sty
789 = ppAboves (item1 : map dup_item dup_imps)
791 item1 = addShortErrLocLine locn1 (\ sty ->
792 ppCat [ppStr "multiple imports from module", ppPStr m1]) sty
794 dup_item (ImportDecl m _ _ _ locn)
795 = addShortErrLocLine locn (\ sty ->
796 ppCat [ppStr "here was another import from module", ppPStr m]) sty
798 qualPreludeImportWarn (ImportDecl m _ _ _ locn)
799 = addShortErrLocLine locn (\ sty ->
800 ppCat [ppStr "qualified import of prelude module", ppPStr m])
802 unknownImpSpecErr ie imp_mod locn
803 = addShortErrLocLine locn (\ sty ->
804 ppBesides [ppStr "module ", ppPStr imp_mod, ppStr " does not export `", ppr sty (ie_name ie), ppStr "'"])
806 duplicateImpSpecErr ie imp_mod locn
807 = addShortErrLocLine locn (\ sty ->
808 ppBesides [ppStr "`", ppr sty (ie_name ie), ppStr "' already seen in import list"])
810 allWhenSynImpSpecWarn n imp_mod locn
811 = addShortErrLocLine locn (\ sty ->
812 ppBesides [ppStr "type synonym `", ppr sty n, ppStr "' should not be imported with (..)"])
814 allWhenAbsImpSpecErr n imp_mod locn
815 = addShortErrLocLine locn (\ sty ->
816 ppBesides [ppStr "module ", ppPStr imp_mod, ppStr " only exports `", ppr sty n, ppStr "' abstractly"])
818 withWhenAbsImpSpecErr n imp_mod locn
819 = addShortErrLocLine locn (\ sty ->
820 ppBesides [ppStr "module ", ppPStr imp_mod, ppStr " only exports `", ppr sty n, ppStr "' abstractly"])
822 withImpSpecErr str n has ns imp_mod locn
823 = addErrLoc locn "" (\ sty ->
824 ppAboves [ ppBesides [ppStr "inconsistent list of", ppStr str, ppStr "in import list for `", ppr sty n, ppStr "'"],
825 ppCat [ppStr " expected:", ppInterleave ppComma (map (ppr sty) has)],
826 ppCat [ppStr " found: ", ppInterleave ppComma (map (ppr sty) ns)] ])
828 dupFieldErr con locn (dup:rest)
829 = addShortErrLocLine locn (\ sty ->
830 ppBesides [ppStr "record field `", ppr sty dup, ppStr "declared multiple times in `", ppr sty con, ppStr "'"])