aboutsummaryrefslogtreecommitdiff
path: root/haddock-api/src/Haddock/Interface/Rename.hs
blob: 7b9481fe4bb6abe8d13c2b81e76bc89d81e4771a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
{-# LANGUAGE TypeFamilies #-}
----------------------------------------------------------------------------
-- |
-- Module      :  Haddock.Interface.Rename
-- Copyright   :  (c) Simon Marlow 2003-2006,
--                    David Waern  2006-2009
-- License     :  BSD-like
--
-- Maintainer  :  haddock@projects.haskell.org
-- Stability   :  experimental
-- Portability :  portable
-----------------------------------------------------------------------------
module Haddock.Interface.Rename (renameInterface) where


import Data.Traversable (traverse, Traversable)

import Haddock.GhcUtils
import Haddock.Types

import Bag (emptyBag)
import GHC hiding (NoLink)
import Name
import NameSet
import Coercion

import Control.Applicative
import Control.Monad hiding (mapM)
import Data.List
import qualified Data.Map as Map hiding ( Map )
import Data.Traversable (mapM)
import Prelude hiding (mapM)


renameInterface :: DynFlags -> LinkEnv -> Bool -> Interface -> ErrMsgM Interface
renameInterface dflags renamingEnv warnings iface =

  -- first create the local env, where every name exported by this module
  -- is mapped to itself, and everything else comes from the global renaming
  -- env
  let localEnv = foldl fn renamingEnv (ifaceVisibleExports iface)
        where fn env name = Map.insert name (ifaceMod iface) env

      -- rename names in the exported declarations to point to things that
      -- are closer to, or maybe even exported by, the current module.
      (renamedExportItems, missingNames1)
        = runRnFM localEnv (renameExportItems (ifaceExportItems iface))

      (rnDocMap, missingNames2) = runRnFM localEnv (mapM renameDoc (ifaceDocMap iface))

      (rnArgMap, missingNames3) = runRnFM localEnv (mapM (mapM renameDoc) (ifaceArgMap iface))

      (finalModuleDoc, missingNames4)
        = runRnFM localEnv (renameDocumentation (ifaceDoc iface))

      -- combine the missing names and filter out the built-ins, which would
      -- otherwise allways be missing.
      missingNames = nub $ filter isExternalName  -- XXX: isExternalName filters out too much
                    (missingNames1 ++ missingNames2 ++ missingNames3 ++ missingNames4)

      -- filter out certain built in type constructors using their string
      -- representation. TODO: use the Name constants from the GHC API.
--      strings = filter (`notElem` ["()", "[]", "(->)"])
--                (map pretty missingNames)
      strings = map (pretty dflags) . filter (\n -> not (isSystemName n || isBuiltInSyntax n)) $ missingNames

  in do
    -- report things that we couldn't link to. Only do this for non-hidden
    -- modules.
    unless (OptHide `elem` ifaceOptions iface || null strings || not warnings) $
      tell ["Warning: " ++ moduleString (ifaceMod iface) ++
            ": could not find link destinations for:\n"++
            unwords ("   " : strings) ]

    return $ iface { ifaceRnDoc         = finalModuleDoc,
                     ifaceRnDocMap      = rnDocMap,
                     ifaceRnArgMap      = rnArgMap,
                     ifaceRnExportItems = renamedExportItems }


--------------------------------------------------------------------------------
-- Monad for renaming
--
-- The monad does two things for us: it passes around the environment for
-- renaming, and it returns a list of names which couldn't be found in
-- the environment.
--------------------------------------------------------------------------------


newtype RnM a =
  RnM { unRn :: (Name -> (Bool, DocName))  -- name lookup function
             -> (a,[Name])
      }

instance Monad RnM where
  (>>=) = thenRn
  return = returnRn

instance Functor RnM where
  fmap f x = do a <- x; return (f a)

instance Applicative RnM where
  pure = return
  (<*>) = ap

returnRn :: a -> RnM a
returnRn a   = RnM (const (a,[]))
thenRn :: RnM a -> (a -> RnM b) -> RnM b
m `thenRn` k = RnM (\lkp -> case unRn m lkp of
  (a,out1) -> case unRn (k a) lkp of
    (b,out2) -> (b,out1++out2))

getLookupRn :: RnM (Name -> (Bool, DocName))
getLookupRn = RnM (\lkp -> (lkp,[]))

outRn :: Name -> RnM ()
outRn name = RnM (const ((),[name]))

lookupRn :: Name -> RnM DocName
lookupRn name = do
  lkp <- getLookupRn
  case lkp name of
    (False,maps_to) -> do outRn name; return maps_to
    (True, maps_to) -> return maps_to


runRnFM :: LinkEnv -> RnM a -> (a,[Name])
runRnFM env rn = unRn rn lkp
  where
    lkp n = case Map.lookup n env of
      Nothing  -> (False, Undocumented n)
      Just mdl -> (True,  Documented n mdl)


--------------------------------------------------------------------------------
-- Renaming
--------------------------------------------------------------------------------


rename :: Name -> RnM DocName
rename = lookupRn


renameL :: Located Name -> RnM (Located DocName)
renameL = mapM rename


renameExportItems :: [ExportItem Name] -> RnM [ExportItem DocName]
renameExportItems = mapM renameExportItem


renameDocForDecl :: DocForDecl Name -> RnM (DocForDecl DocName)
renameDocForDecl (doc, fnArgsDoc) =
  (,) <$> renameDocumentation doc <*> renameFnArgsDoc fnArgsDoc


renameDocumentation :: Documentation Name -> RnM (Documentation DocName)
renameDocumentation (Documentation mDoc mWarning) =
  Documentation <$> mapM renameDoc mDoc <*> mapM renameDoc mWarning


renameLDocHsSyn :: LHsDocString -> RnM LHsDocString
renameLDocHsSyn = return


renameDoc :: Traversable t => t Name -> RnM (t DocName)
renameDoc = traverse rename

renameFnArgsDoc :: FnArgsDoc Name -> RnM (FnArgsDoc DocName)
renameFnArgsDoc = mapM renameDoc


renameLType :: LHsType Name -> RnM (LHsType DocName)
renameLType = mapM renameType

renameLKind :: LHsKind Name -> RnM (LHsKind DocName)
renameLKind = renameLType

renameMaybeLKind :: Maybe (LHsKind Name) -> RnM (Maybe (LHsKind DocName))
renameMaybeLKind = traverse renameLKind


renameType :: HsType Name -> RnM (HsType DocName)
renameType t = case t of
  HsForAllTy expl extra tyvars lcontext ltype -> do
    tyvars'   <- renameLTyVarBndrs tyvars
    lcontext' <- renameLContext lcontext
    ltype'    <- renameLType ltype
    return (HsForAllTy expl extra tyvars' lcontext' ltype')

  HsTyVar n -> return . HsTyVar =<< rename n
  HsBangTy b ltype -> return . HsBangTy b =<< renameLType ltype

  HsAppTy a b -> do
    a' <- renameLType a
    b' <- renameLType b
    return (HsAppTy a' b')

  HsFunTy a b -> do
    a' <- renameLType a
    b' <- renameLType b
    return (HsFunTy a' b')

  HsListTy ty -> return . HsListTy =<< renameLType ty
  HsPArrTy ty -> return . HsPArrTy =<< renameLType ty
  HsIParamTy n ty -> liftM (HsIParamTy n) (renameLType ty)
  HsEqTy ty1 ty2 -> liftM2 HsEqTy (renameLType ty1) (renameLType ty2)

  HsTupleTy b ts -> return . HsTupleTy b =<< mapM renameLType ts

  HsOpTy a (w, L loc op) b -> do
    op' <- rename op
    a'  <- renameLType a
    b'  <- renameLType b
    return (HsOpTy a' (w, L loc op') b')

  HsParTy ty -> return . HsParTy =<< renameLType ty

  HsKindSig ty k -> do
    ty' <- renameLType ty
    k' <- renameLKind k
    return (HsKindSig ty' k')

  HsDocTy ty doc -> do
    ty' <- renameLType ty
    doc' <- renameLDocHsSyn doc
    return (HsDocTy ty' doc')

  HsTyLit x -> return (HsTyLit x)

  HsWrapTy a b            -> HsWrapTy a <$> renameType b
  HsRecTy a               -> HsRecTy <$> mapM renameConDeclFieldField a
  HsCoreTy a              -> pure (HsCoreTy a)
  HsExplicitListTy  a b   -> HsExplicitListTy  a <$> mapM renameLType b
  HsExplicitTupleTy a b   -> HsExplicitTupleTy a <$> mapM renameLType b
  HsQuasiQuoteTy a        -> HsQuasiQuoteTy <$> renameHsQuasiQuote a
  HsSpliceTy _ _          -> error "renameType: HsSpliceTy"
  HsWildcardTy            -> pure HsWildcardTy
  HsNamedWildcardTy a     -> HsNamedWildcardTy <$> rename a

renameHsQuasiQuote :: HsQuasiQuote Name -> RnM (HsQuasiQuote DocName)
renameHsQuasiQuote (HsQuasiQuote a b c) = HsQuasiQuote <$> rename a <*> pure b <*> pure c

renameLTyVarBndrs :: LHsTyVarBndrs Name -> RnM (LHsTyVarBndrs DocName)
renameLTyVarBndrs (HsQTvs { hsq_kvs = _, hsq_tvs = tvs })
  = do { tvs' <- mapM renameLTyVarBndr tvs
       ; return (HsQTvs { hsq_kvs = error "haddock:renameLTyVarBndrs", hsq_tvs = tvs' }) }
                -- This is rather bogus, but I'm not sure what else to do

renameLTyVarBndr :: LHsTyVarBndr Name -> RnM (LHsTyVarBndr DocName)
renameLTyVarBndr (L loc (UserTyVar n))
  = do { n' <- rename n
       ; return (L loc (UserTyVar n')) }
renameLTyVarBndr (L loc (KindedTyVar n kind))
  = do { n' <- rename n
       ; kind' <- renameLKind kind
       ; return (L loc (KindedTyVar n' kind')) }

renameLContext :: Located [LHsType Name] -> RnM (Located [LHsType DocName])
renameLContext (L loc context) = do
  context' <- mapM renameLType context
  return (L loc context')

renameInstHead :: InstHead Name -> RnM (InstHead DocName)
renameInstHead (className, k, types, rest) = do
  className' <- rename className
  k' <- mapM renameType k
  types' <- mapM renameType types
  rest' <- case rest of
    ClassInst cs -> ClassInst <$> mapM renameType cs
    TypeInst  ts -> TypeInst  <$> traverse renameType ts
    DataInst  dd -> DataInst  <$> renameTyClD dd
  return (className', k', types', rest')


renameLDecl :: LHsDecl Name -> RnM (LHsDecl DocName)
renameLDecl (L loc d) = return . L loc =<< renameDecl d


renameDecl :: HsDecl Name -> RnM (HsDecl DocName)
renameDecl decl = case decl of
  TyClD d -> do
    d' <- renameTyClD d
    return (TyClD d')
  SigD s -> do
    s' <- renameSig s
    return (SigD s')
  ForD d -> do
    d' <- renameForD d
    return (ForD d')
  InstD d -> do
    d' <- renameInstD d
    return (InstD d')
  _ -> error "renameDecl"

renameLThing :: (a Name -> RnM (a DocName)) -> Located (a Name) -> RnM (Located (a DocName))
renameLThing fn (L loc x) = return . L loc =<< fn x

renameTyClD :: TyClDecl Name -> RnM (TyClDecl DocName)
renameTyClD d = case d of
--  TyFamily flav lname ltyvars kind tckind -> do
  FamDecl { tcdFam = decl } -> do
    decl' <- renameFamilyDecl decl
    return (FamDecl { tcdFam = decl' })

  SynDecl { tcdLName = lname, tcdTyVars = tyvars, tcdRhs = rhs, tcdFVs = _fvs } -> do
    lname'    <- renameL lname
    tyvars'   <- renameLTyVarBndrs tyvars
    rhs'     <- renameLType rhs
    return (SynDecl { tcdLName = lname', tcdTyVars = tyvars', tcdRhs = rhs', tcdFVs = placeHolderNames })

  DataDecl { tcdLName = lname, tcdTyVars = tyvars, tcdDataDefn = defn, tcdFVs = _fvs } -> do
    lname'    <- renameL lname
    tyvars'   <- renameLTyVarBndrs tyvars
    defn'     <- renameDataDefn defn
    return (DataDecl { tcdLName = lname', tcdTyVars = tyvars', tcdDataDefn = defn', tcdFVs = placeHolderNames })

  ClassDecl { tcdCtxt = lcontext, tcdLName = lname, tcdTyVars = ltyvars
            , tcdFDs = lfundeps, tcdSigs = lsigs, tcdATs = ats, tcdATDefs = at_defs } -> do
    lcontext' <- renameLContext lcontext
    lname'    <- renameL lname
    ltyvars'  <- renameLTyVarBndrs ltyvars
    lfundeps' <- mapM renameLFunDep lfundeps
    lsigs'    <- mapM renameLSig lsigs
    ats'      <- mapM (renameLThing renameFamilyDecl) ats
    at_defs'  <- mapM renameLTyFamDefltEqn at_defs
    -- we don't need the default methods or the already collected doc entities
    return (ClassDecl { tcdCtxt = lcontext', tcdLName = lname', tcdTyVars = ltyvars'
                      , tcdFDs = lfundeps', tcdSigs = lsigs', tcdMeths= emptyBag
                      , tcdATs = ats', tcdATDefs = at_defs', tcdDocs = [], tcdFVs = placeHolderNames })

  where
    renameLFunDep (L loc (xs, ys)) = do
      xs' <- mapM rename xs
      ys' <- mapM rename ys
      return (L loc (xs', ys'))

    renameLSig (L loc sig) = return . L loc =<< renameSig sig

renameFamilyDecl :: FamilyDecl Name -> RnM (FamilyDecl DocName)
renameFamilyDecl (FamilyDecl { fdInfo = info, fdLName = lname
                             , fdTyVars = ltyvars, fdKindSig = tckind }) = do
    info'    <- renameFamilyInfo info
    lname'   <- renameL lname
    ltyvars' <- renameLTyVarBndrs ltyvars
    tckind'  <- renameMaybeLKind tckind
    return (FamilyDecl { fdInfo = info', fdLName = lname'
                       , fdTyVars = ltyvars', fdKindSig = tckind' })

renameFamilyInfo :: FamilyInfo Name -> RnM (FamilyInfo DocName)
renameFamilyInfo DataFamily     = return DataFamily
renameFamilyInfo OpenTypeFamily = return OpenTypeFamily
renameFamilyInfo (ClosedTypeFamily eqns)
  = do { eqns' <- mapM renameLTyFamInstEqn eqns
       ; return $ ClosedTypeFamily eqns' }

renameDataDefn :: HsDataDefn Name -> RnM (HsDataDefn DocName)
renameDataDefn (HsDataDefn { dd_ND = nd, dd_ctxt = lcontext, dd_cType = cType
                           , dd_kindSig = k, dd_cons = cons }) = do
    lcontext' <- renameLContext lcontext
    k'        <- renameMaybeLKind k
    cons'     <- mapM (mapM renameCon) cons
    -- I don't think we need the derivings, so we return Nothing
    return (HsDataDefn { dd_ND = nd, dd_ctxt = lcontext', dd_cType = cType
                       , dd_kindSig = k', dd_cons = cons', dd_derivs = Nothing })

renameCon :: ConDecl Name -> RnM (ConDecl DocName)
renameCon decl@(ConDecl { con_names = lnames, con_qvars = ltyvars
                        , con_cxt = lcontext, con_details = details
                        , con_res = restype, con_doc = mbldoc }) = do
      lnames'   <- mapM renameL lnames
      ltyvars'  <- renameLTyVarBndrs ltyvars
      lcontext' <- renameLContext lcontext
      details'  <- renameDetails details
      restype'  <- renameResType restype
      mbldoc'   <- mapM renameLDocHsSyn mbldoc
      return (decl { con_names = lnames', con_qvars = ltyvars', con_cxt = lcontext'
                   , con_details = details', con_res = restype', con_doc = mbldoc' })

  where
    renameDetails (RecCon fields) = do
      fields' <- mapM renameConDeclFieldField fields
      return (RecCon fields')
    renameDetails (PrefixCon ps) = return . PrefixCon =<< mapM renameLType ps
    renameDetails (InfixCon a b) = do
      a' <- renameLType a
      b' <- renameLType b
      return (InfixCon a' b')

    renameResType (ResTyH98) = return ResTyH98
    renameResType (ResTyGADT t) = return . ResTyGADT =<< renameLType t


renameConDeclFieldField :: LConDeclField Name -> RnM (LConDeclField DocName)
renameConDeclFieldField (L l (ConDeclField names t doc)) = do
  names' <- mapM renameL names
  t'   <- renameLType t
  doc' <- mapM renameLDocHsSyn doc
  return $ L l (ConDeclField names' t' doc')


renameSig :: Sig Name -> RnM (Sig DocName)
renameSig sig = case sig of
  TypeSig lnames ltype _ -> do
    lnames' <- mapM renameL lnames
    ltype' <- renameLType ltype
    return (TypeSig lnames' ltype' PlaceHolder)
  PatSynSig lname (flag, qtvs) lreq lprov lty -> do
    lname' <- renameL lname
    qtvs' <- renameLTyVarBndrs qtvs
    lreq' <- renameLContext lreq
    lprov' <- renameLContext lprov
    lty' <- renameLType lty
    return $ PatSynSig lname' (flag, qtvs') lreq' lprov' lty'
  FixSig (FixitySig lnames fixity) -> do
    lnames' <- mapM renameL lnames
    return $ FixSig (FixitySig lnames' fixity)
  MinimalSig s -> MinimalSig <$> traverse renameL s
  -- we have filtered out all other kinds of signatures in Interface.Create
  _ -> error "expected TypeSig"


renameForD :: ForeignDecl Name -> RnM (ForeignDecl DocName)
renameForD (ForeignImport lname ltype co x) = do
  lname' <- renameL lname
  ltype' <- renameLType ltype
  return (ForeignImport lname' ltype' co x)
renameForD (ForeignExport lname ltype co x) = do
  lname' <- renameL lname
  ltype' <- renameLType ltype
  return (ForeignExport lname' ltype' co x)


renameInstD :: InstDecl Name -> RnM (InstDecl DocName)
renameInstD (ClsInstD { cid_inst = d }) = do
  d' <- renameClsInstD d
  return (ClsInstD { cid_inst = d' })
renameInstD (TyFamInstD { tfid_inst = d }) = do
  d' <- renameTyFamInstD d
  return (TyFamInstD { tfid_inst = d' })
renameInstD (DataFamInstD { dfid_inst = d }) = do
  d' <- renameDataFamInstD d
  return (DataFamInstD { dfid_inst = d' })

renameClsInstD :: ClsInstDecl Name -> RnM (ClsInstDecl DocName)
renameClsInstD (ClsInstDecl { cid_overlap_mode = omode
                            , cid_poly_ty =ltype, cid_tyfam_insts = lATs
                            , cid_datafam_insts = lADTs }) = do
  ltype' <- renameLType ltype
  lATs'  <- mapM (mapM renameTyFamInstD) lATs
  lADTs' <- mapM (mapM renameDataFamInstD) lADTs
  return (ClsInstDecl { cid_overlap_mode = omode
                      , cid_poly_ty = ltype', cid_binds = emptyBag
                      , cid_sigs = []
                      , cid_tyfam_insts = lATs', cid_datafam_insts = lADTs' })


renameTyFamInstD :: TyFamInstDecl Name -> RnM (TyFamInstDecl DocName)
renameTyFamInstD (TyFamInstDecl { tfid_eqn = eqn })
  = do { eqn' <- renameLTyFamInstEqn eqn
       ; return (TyFamInstDecl { tfid_eqn = eqn'
                               , tfid_fvs = placeHolderNames }) }

renameLTyFamInstEqn :: LTyFamInstEqn Name -> RnM (LTyFamInstEqn DocName)
renameLTyFamInstEqn (L loc (TyFamEqn { tfe_tycon = tc, tfe_pats = pats_w_bndrs, tfe_rhs = rhs }))
  = do { tc' <- renameL tc
       ; pats' <- mapM renameLType (hswb_cts pats_w_bndrs)
       ; rhs' <- renameLType rhs
       ; return (L loc (TyFamEqn { tfe_tycon = tc'
                                 , tfe_pats = HsWB pats' PlaceHolder PlaceHolder PlaceHolder
                                 , tfe_rhs = rhs' })) }

renameLTyFamDefltEqn :: LTyFamDefltEqn Name -> RnM (LTyFamDefltEqn DocName)
renameLTyFamDefltEqn (L loc (TyFamEqn { tfe_tycon = tc, tfe_pats = tvs, tfe_rhs = rhs }))
  = do { tc' <- renameL tc
       ; tvs'  <- renameLTyVarBndrs tvs
       ; rhs' <- renameLType rhs
       ; return (L loc (TyFamEqn { tfe_tycon = tc'
                                 , tfe_pats = tvs'
                                 , tfe_rhs = rhs' })) }

renameDataFamInstD :: DataFamInstDecl Name -> RnM (DataFamInstDecl DocName)
renameDataFamInstD (DataFamInstDecl { dfid_tycon = tc, dfid_pats = pats_w_bndrs, dfid_defn = defn })
  = do { tc' <- renameL tc
       ; pats' <- mapM renameLType (hswb_cts pats_w_bndrs)
       ; defn' <- renameDataDefn defn
       ; return (DataFamInstDecl { dfid_tycon = tc'
                                 , dfid_pats
                                       = HsWB pats' PlaceHolder PlaceHolder PlaceHolder
                                 , dfid_defn = defn', dfid_fvs = placeHolderNames }) }

renameExportItem :: ExportItem Name -> RnM (ExportItem DocName)
renameExportItem item = case item of
  ExportModule mdl -> return (ExportModule mdl)
  ExportGroup lev id_ doc -> do
    doc' <- renameDoc doc
    return (ExportGroup lev id_ doc')
  ExportDecl decl doc subs instances fixities splice -> do
    decl' <- renameLDecl decl
    doc'  <- renameDocForDecl doc
    subs' <- mapM renameSub subs
    instances' <- forM instances $ \(L l inst, idoc) -> do
      inst' <- renameInstHead inst
      idoc' <- mapM renameDoc idoc
      return (L l inst', idoc')
    fixities' <- forM fixities $ \(name, fixity) -> do
      name' <- lookupRn name
      return (name', fixity)
    return (ExportDecl decl' doc' subs' instances' fixities' splice)
  ExportNoDecl x subs -> do
    x'    <- lookupRn x
    subs' <- mapM lookupRn subs
    return (ExportNoDecl x' subs')
  ExportDoc doc -> do
    doc' <- renameDoc doc
    return (ExportDoc doc')


renameSub :: (Name, DocForDecl Name) -> RnM (DocName, DocForDecl DocName)
renameSub (n,doc) = do
  n' <- rename n
  doc' <- renameDocForDecl doc
  return (n', doc')

type instance PostRn DocName NameSet  = PlaceHolder
type instance PostRn DocName Fixity   = PlaceHolder
type instance PostRn DocName Bool     = PlaceHolder
type instance PostRn DocName [Name]   = PlaceHolder

type instance PostTc DocName Kind     = PlaceHolder
type instance PostTc DocName Type     = PlaceHolder
type instance PostTc DocName Coercion = PlaceHolder