2 % (c) The GRASP Project, Glasgow University, 1992-1996
4 \section[Rename]{Renaming and dependency analysis passes}
7 #include "HsVersions.h"
9 module Rename ( renameModule ) where
11 import PreludeGlaST ( thenPrimIO, newVar, MutableVar(..) )
16 import RdrHsSyn ( RdrNameHsModule(..), RdrNameImportDecl(..) )
17 import RnHsSyn ( RnName, RenamedHsModule(..), isRnTyConOrClass, isRnWired )
19 --ToDo:rm: all for debugging only
27 import Util (pprPanic, pprTrace)
29 import ParseUtils ( ParsedIface(..), RdrIfaceDecl(..), RdrIfaceInst(..),
30 UsagesMap(..), VersionsMap(..)
33 import RnNames ( getGlobalNames, GlobalNameInfo(..) )
34 import RnSource ( rnSource )
35 import RnIfaces ( findHiFiles, rnIfaces )
36 import RnUtils ( RnEnv(..), extendGlobalRnEnv, emptyRnEnv, multipleOccWarn )
38 import Bag ( isEmptyBag, unionBags, unionManyBags, bagToList, listToBag )
39 import CmdLineOpts ( opt_HiDirList, opt_SysHiDirList )
40 import ErrUtils ( Error(..), Warning(..) )
41 import FiniteMap ( emptyFM, eltsFM, fmToList, lookupFM{-ToDo:rm-} )
42 import Maybes ( catMaybes )
43 import Name ( isLocallyDefined, mkBuiltinName, Name, RdrName(..) )
44 import PrelInfo ( builtinNameInfo, BuiltinNames(..), BuiltinKeys(..) )
45 import PrelMods ( pRELUDE )
46 import UniqFM ( emptyUFM, lookupUFM, addListToUFM_C, eltsUFM )
47 import UniqSupply ( splitUniqSupply )
48 import Util ( panic, assertPanic )
52 renameModule :: UniqSupply
55 -> IO (RenamedHsModule, -- output, after renaming
56 RnEnv, -- final env (for renaming derivings)
57 [Module], -- imported modules; for profiling
60 VersionsMap, -- version info; for usage
61 [Module]), -- instance modules; for iface
67 ToDo: May want to arrange to return old interface for this module!
68 ToDo: Builtin names which must be read.
69 ToDo: Deal with instances (instance version, this module on instance list ???)
72 renameModule us input@(HsModule mod _ _ imports _ _ _ _ _ _ _ _ _ _)
75 (b_names, b_keys, _) = builtinNameInfo
77 --pprTrace "builtins:\n" (case b_names of { (builtin_ids, builtin_tcs) ->
78 -- ppAboves [ ppCat (map ppPStr (keysFM builtin_ids))
79 -- , ppCat (map ppPStr (keysFM builtin_tcs))
80 -- , ppCat (map ppPStr (keysFM b_keys))
83 findHiFiles opt_HiDirList opt_SysHiDirList >>= \ hi_files ->
84 newVar (emptyFM, hi_files){-init iface cache-} `thenPrimIO` \ iface_cache ->
86 fixIO ( \ ~(_, _, _, _, rec_occ_fm, rec_export_fn) ->
88 rec_occ_fn :: Name -> [RdrName]
89 rec_occ_fn n = case lookupUFM rec_occ_fm n of
91 Just (rn,occs) -> occs
93 global_name_info = (b_names, b_keys, rec_export_fn, rec_occ_fn)
95 getGlobalNames iface_cache global_name_info us1 input >>=
96 \ (occ_env, imp_mods, unqual_imps, imp_fixes, top_errs, top_warns) ->
98 if not (isEmptyBag top_errs) then
99 return (rn_panic, rn_panic, top_errs, top_warns, emptyUFM, rn_panic)
102 -- No top-level name errors so rename source ...
103 case initRn True mod occ_env us2
104 (rnSource imp_mods unqual_imps imp_fixes input) of {
105 ((rn_module, export_fn, src_occs), src_errs, src_warns) ->
107 --pprTrace "renameModule:" (ppCat (map (ppr PprDebug . fst) (bagToList src_occs))) $
110 occ_fm :: UniqFM (RnName, [RdrName])
112 occ_list = [ (rn,(rn,[occ])) | (rn,occ) <- bagToList src_occs]
113 occ_fm = addListToUFM_C insert_occ emptyUFM occ_list
115 insert_occ (rn,olds) (rn',[new]) = (rn, insert new olds)
117 insert new [] = [new]
118 insert new xxs@(x:xs) = case cmp new x of LT_ -> new : xxs
120 GT__ -> x : insert new xs
122 occ_warns = map multipleOccWarn (filter multiple_occs (eltsUFM occ_fm))
123 multiple_occs (rn, (o1:o2:_)) = True
124 multiple_occs _ = False
126 return (rn_module, imp_mods,
127 top_errs `unionBags` src_errs,
128 top_warns `unionBags` src_warns `unionBags` listToBag occ_warns,
131 }) >>= \ (rn_module, imp_mods, errs_so_far, warns_so_far, occ_fm, _) ->
133 if not (isEmptyBag errs_so_far) then
134 return (rn_panic, rn_panic, rn_panic, rn_panic, errs_so_far, warns_so_far)
137 -- No errors renaming source so rename the interfaces ...
139 -- split up all names that occurred in the source; between
140 -- those that are defined therein and those merely mentioned.
141 -- We also divide by tycon/class and value names (as usual).
143 occ_rns = [ rn | (rn,_) <- eltsUFM occ_fm ]
144 -- all occurrence names, from this module and imported
146 (defined_here, defined_elsewhere)
147 = partition isLocallyDefined occ_rns
150 = partition isRnWired defined_elsewhere
152 (def_tcs, def_vals) = partition isRnTyConOrClass defined_here
153 (occ_tcs, occ_vals) = partition isRnTyConOrClass occ_rns
154 -- the occ stuff includes *all* occurrences,
155 -- including those for which we have definitions
157 (orig_def_env, orig_def_dups)
158 = extendGlobalRnEnv emptyRnEnv (map pair_orig def_vals)
159 (map pair_orig def_tcs)
160 (orig_occ_env, orig_occ_dups)
161 = extendGlobalRnEnv emptyRnEnv (map pair_orig occ_vals)
162 (map pair_orig occ_tcs)
164 pair_orig rn = (origName rn, rn)
166 -- we must ensure that the definitions of things in the BuiltinKey
167 -- table which may be *required* by the typechecker etc are read.
170 = [ name_fn (mkBuiltinName u pRELUDE str)
171 | (str, (u, name_fn)) <- fmToList b_keys,
172 str `notElem` [ SLIT("main"), SLIT("mainPrimIO")] ]
174 ASSERT (isEmptyBag orig_occ_dups)
175 ASSERT (isEmptyBag orig_def_dups)
177 rnIfaces iface_cache imp_mods us3 orig_def_env orig_occ_env
178 rn_module (must_haves ++ imports_used) >>=
179 \ (rn_module_with_imports, final_env,
180 (implicit_val_fm, implicit_tc_fm),
182 (iface_errs, iface_warns)) ->
184 return (rn_module_with_imports,
188 errs_so_far `unionBags` iface_errs,
189 warns_so_far `unionBags` iface_warns)
191 rn_panic = panic "renameModule: aborted with errors"
193 (us1, us') = splitUniqSupply us
194 (us2, us3) = splitUniqSupply us'
199 pprPIface (ParsedIface m v mv usgs lcm exm ims lfx ltdm lvdm lids ldp)
201 ppCat [ppPStr SLIT("interface"), ppPStr m, ppInt v,
202 case mv of { Nothing -> ppNil; Just n -> ppInt n }],
204 ppPStr SLIT("__versions__"),
205 ppAboves [ ppCat[ppPStr n, ppInt v] | (n,v) <- fmToList lcm ],
207 ppPStr SLIT("__exports__"),
208 ppAboves [ ppBesides[ppPStr n, ppSP, ppr PprDebug rn,
209 case ex of {ExportAll -> ppStr "(..)"; _ -> ppNil}]
210 | (n,(rn,ex)) <- fmToList exm ],
212 pp_ims (bagToList ims),
215 pp_insts (bagToList lids),
220 pp_ims ms = ppAbove (ppPStr SLIT("__instance_modules__"))
221 (ppCat (map ppPStr ms))
224 | isEmptyFM fx = ppNil
225 | otherwise = ppAboves (ppPStr SLIT("__fixities__")
226 : [ ppr PprDebug fix | (n, fix) <- fmToList fx])
228 pp_decls tds vds = ppAboves (ppPStr SLIT("__declarations__")
229 : [ pprRdrIfaceDecl d | (n, d) <- fmToList tds ++ fmToList vds])
232 pp_insts is = ppAboves (ppPStr SLIT("__instances__")
233 : [ pprRdrInstDecl i | i <- is])
235 pp_pragmas ps | isEmptyFM ps = ppNil
236 | otherwise = panic "Rename.pp_pragmas"
238 pprRdrIfaceDecl (TypeSig tc _ decl)
239 = ppBesides [ppStr "tycon=", ppr PprDebug tc, ppStr "; ", ppr PprDebug decl]
241 pprRdrIfaceDecl (NewTypeSig tc dc _ decl)
242 = ppBesides [ppStr "tycon=", ppr PprDebug tc, ppStr "; datacon=", ppr PprDebug dc,
243 ppStr "; ", ppr PprDebug decl]
245 pprRdrIfaceDecl (DataSig tc dcs dfs _ decl)
246 = ppBesides [ppStr "tycon=", ppr PprDebug tc, ppStr "; datacons=", ppr PprDebug dcs,
247 ppStr "; fields=", ppr PprDebug dfs, ppStr "; ", ppr PprDebug decl]
249 pprRdrIfaceDecl (ClassSig c ops _ decl)
250 = ppBesides [ppStr "class=", ppr PprDebug c, ppStr "; ops=", ppr PprDebug ops,
251 ppStr "; ", ppr PprDebug decl]
253 pprRdrIfaceDecl (ValSig f _ ty)
254 = ppBesides [ppr PprDebug f, ppStr " :: ", ppr PprDebug ty]
256 pprRdrInstDecl (InstSig c t _ decl)
257 = ppBesides [ppStr "class=", ppr PprDebug c, ppStr " type=", ppr PprDebug t, ppStr "; ",