aboutsummaryrefslogtreecommitdiffhomepage
path: root/toplevel/vernacentries.ml
blob: e7d32782d6e5f7a04016a6efd813f5aaaedec8c5 (plain)
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
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
(************************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(*   \VV/  **************************************************************)
(*    //   *      This file is distributed under the terms of the       *)
(*         *       GNU Lesser General Public License Version 2.1        *)
(************************************************************************)

(*i $Id$ i*)

(* Concrete syntax of the mathematical vernacular MV V2.6 *)

open Pp
open Util
open Flags
open Names
open Entries
open Nameops
open Term
open Pfedit
open Tacmach
open Proof_trees
open Decl_mode
open Constrintern
open Prettyp
open Printer
open Tactic_printer
open Tacinterp
open Command
open Goptions
open Libnames
open Nametab
open Vernacexpr
open Decl_kinds
open Topconstr
open Pretyping
open Redexpr
open Syntax_def
open Lemmas

(* Pcoq hooks *)

type pcoq_hook = {
  start_proof : unit -> unit;
  solve : int -> unit;
  abort : string -> unit;
  search : searchable -> dir_path list * bool -> unit;
  print_name : reference Genarg.or_by_notation -> unit;
  print_check : Environ.env -> Environ.unsafe_judgment -> unit;
  print_eval : Reductionops.reduction_function -> Environ.env -> Evd.evar_map -> constr_expr ->
    Environ.unsafe_judgment -> unit;
  show_goal : int option -> unit
}

let pcoq = ref None
let set_pcoq_hook f = pcoq := Some f

(* Misc *)

let cl_of_qualid = function
  | FunClass -> Classops.CL_FUN
  | SortClass -> Classops.CL_SORT
  | RefClass r -> Class.class_of_global (Smartlocate.smart_global r)

(*******************)
(* "Show" commands *)

let show_proof () =
  let pts = get_pftreestate () in
  let cursor = cursor_of_pftreestate pts in
  let evc = evc_of_pftreestate pts in
  let (pfterm,meta_types) = extract_open_pftreestate pts in
  msgnl (str"LOC: " ++
    prlist_with_sep pr_spc pr_int (List.rev cursor) ++ fnl () ++
    str"Subgoals" ++ fnl () ++
    prlist (fun (mv,ty) -> Nameops.pr_meta mv ++ str" -> " ++
      pr_ltype ty ++ fnl ())
      meta_types
    ++ str"Proof: " ++ pr_lconstr (Evarutil.nf_evar evc pfterm))

let show_node () =
  let pts = get_pftreestate () in
  let pf = proof_of_pftreestate pts
  and cursor = cursor_of_pftreestate pts in
  msgnl (prlist_with_sep pr_spc pr_int (List.rev cursor) ++ fnl () ++
         pr_goal (goal_of_proof pf) ++ fnl () ++
         (match pf.Proof_type.ref with
            | None -> (str"BY <rule>")
            | Some(r,spfl) ->
		(str"BY " ++ pr_rule r ++ fnl () ++
		 str"  " ++
		   hov 0 (prlist_with_sep pr_fnl pr_goal
			    (List.map goal_of_proof spfl)))))

let show_script () =
  let pts = get_pftreestate () in
  let pf = proof_of_pftreestate pts
  and evc = evc_of_pftreestate pts in
  msgnl_with !Pp_control.deep_ft (print_treescript evc pf)

let show_thesis () =
     msgnl (anomaly "TODO" )

let show_top_evars () =
  let pfts = get_pftreestate () in
  let gls = top_goal_of_pftreestate pfts in
  let sigma = project gls in
  msg (pr_evars_int 1 (Evarutil.non_instantiated sigma))

let show_prooftree () =
  let pts = get_pftreestate () in
  let pf = proof_of_pftreestate pts
  and evc = evc_of_pftreestate pts in
  msg (print_proof evc (Global.named_context()) pf)

let print_subgoals () = if_verbose (fun () -> msg (pr_open_subgoals ())) ()

  (* Simulate the Intro(s) tactic *)

let show_intro all =
  let pf = get_pftreestate() in
  let gl = nth_goal_of_pftreestate 1 pf in
  let l,_= decompose_prod_assum (strip_outer_cast (pf_concl gl)) in
  if all
  then
    let lid = Tactics.find_intro_names l gl in
    msgnl (hov 0 (prlist_with_sep  spc pr_id lid))
  else
    try
      let n = list_last l in
      msgnl (pr_id (List.hd (Tactics.find_intro_names [n] gl)))
    with Failure "list_last" -> message ""

let id_of_name = function
  | Names.Anonymous -> id_of_string "x"
  | Names.Name x -> x


(* Building of match expression *)
(* From ide/coq.ml *)
let make_cases s =
  let qualified_name = Libnames.qualid_of_string s in
  let glob_ref = Nametab.locate qualified_name in
  match glob_ref with
    | Libnames.IndRef i ->
	let {Declarations.mind_nparams = np}
	    , {Declarations.mind_consnames = carr ; Declarations.mind_nf_lc = tarr }
	      = Global.lookup_inductive i in
	Util.array_fold_right2
	  (fun n t l ->
	     let (al,_) = Term.decompose_prod t in
	     let al,_ = Util.list_chop (List.length al - np) al in
	     let rec rename avoid = function
	       | [] -> []
	       | (n,_)::l ->
		   let n' = Namegen.next_ident_away_in_goal (id_of_name n) avoid in
		   string_of_id n' :: rename (n'::avoid) l in
	     let al' = rename [] (List.rev al) in
	     (string_of_id n :: al') :: l)
	  carr tarr []
    | _ -> raise Not_found


let show_match id =
  try
    let s = string_of_id (snd id) in
    let patterns = List.rev (make_cases s) in
    let cases =
      List.fold_left
	(fun acc x ->
	  match x with
	    | [] -> assert false
	    | [x] -> "| "^ x  ^ " => \n" ^ acc
	    | x::l ->
		"| (" ^ List.fold_left (fun acc s ->  acc ^ " " ^ s) x l ^ ")"
		^ " => \n" ^ acc)
	"end" patterns in
    msg (str ("match # with\n" ^ cases))
  with Not_found -> error "Unknown inductive type."

(* "Print" commands *)

let print_path_entry (s,l) =
  (str (string_of_dirpath l) ++ str " " ++ tbrk (0,0) ++ str s)

let print_loadpath dir =
  let l = Library.get_full_load_paths () in
  let l = match dir with
    | None -> l
    | Some dir -> List.filter (fun (s,l) -> is_dirpath_prefix_of dir l) l in
  msgnl (Pp.t (str "Logical Path:                 " ++
		 tab () ++ str "Physical path:" ++ fnl () ++
		 prlist_with_sep pr_fnl print_path_entry l))

let print_modules () =
  let opened = Library.opened_libraries ()
  and loaded = Library.loaded_libraries () in
  let loaded_opened = list_intersect loaded opened
  and only_loaded = list_subtract loaded opened in
  str"Loaded and imported library files: " ++
  pr_vertical_list pr_dirpath loaded_opened ++ fnl () ++
  str"Loaded and not imported library files: " ++
  pr_vertical_list pr_dirpath only_loaded


let print_module r =
  let (loc,qid) = qualid_of_reference r in
  try
    let globdir = Nametab.locate_dir qid in
      match globdir with
	  DirModule (dirpath,(mp,_)) ->
	    msgnl (Printmod.print_module (Printmod.printable_body dirpath) mp)
	| _ -> raise Not_found
  with
      Not_found -> msgnl (str"Unknown Module " ++ pr_qualid qid)

let print_modtype r =
  let (loc,qid) = qualid_of_reference r in
  try
    let kn = Nametab.locate_modtype qid in
      msgnl (Printmod.print_modtype kn)
  with
      Not_found -> msgnl (str"Unknown Module Type " ++ pr_qualid qid)

let dump_universes s =
  let output = open_out s in
  try
    Univ.dump_universes output (Global.universes ());
    close_out output;
    msgnl (str ("Universes written to file \""^s^"\"."))
  with
      e -> close_out output; raise e

(*********************)
(* "Locate" commands *)

let locate_file f =
  let _,file = System.find_file_in_path ~warn:false (Library.get_load_paths ()) f in
  msgnl (str file)

let msg_found_library = function
  | Library.LibLoaded, fulldir, file ->
      msgnl (hov 0
	(pr_dirpath fulldir ++ strbrk " has been loaded from file " ++
	 str file))
  | Library.LibInPath, fulldir, file ->
      msgnl (hov 0
	(pr_dirpath fulldir ++ strbrk " is bound to file " ++ str file))
let msg_notfound_library loc qid = function
  | Library.LibUnmappedDir ->
      let dir = fst (repr_qualid qid) in
      user_err_loc (loc,"locate_library",
        strbrk "Cannot find a physical path bound to logical path " ++
           pr_dirpath dir ++ str".")
  | Library.LibNotFound ->
      msgnl (hov 0
	(strbrk "Unable to locate library " ++ pr_qualid qid ++ str"."))
  | e -> assert false

let print_located_library r =
  let (loc,qid) = qualid_of_reference r in
  try msg_found_library (Library.locate_qualified_library false qid)
  with e -> msg_notfound_library loc qid e

let print_located_module r =
  let (loc,qid) = qualid_of_reference r in
  let msg =
    try
      let dir = Nametab.full_name_module qid in
      str "Module " ++ pr_dirpath dir
    with Not_found ->
      (if fst (repr_qualid qid) = empty_dirpath then
	str "No module is referred to by basename "
      else
	str "No module is referred to by name ") ++ pr_qualid qid
  in msgnl msg

let smart_global r =
  let gr = Smartlocate.smart_global r in
    Dumpglob.add_glob (Genarg.loc_of_or_by_notation loc_of_reference r) gr;
    gr

(**********)
(* Syntax *)

let vernac_syntax_extension = Metasyntax.add_syntax_extension

let vernac_delimiters = Metasyntax.add_delimiters

let vernac_bind_scope sc cll =
  List.iter (fun cl -> Metasyntax.add_class_scope sc (cl_of_qualid cl)) cll

let vernac_open_close_scope = Notation.open_close_scope

let vernac_arguments_scope local r scl =
  Notation.declare_arguments_scope local (smart_global r) scl

let vernac_infix = Metasyntax.add_infix

let vernac_notation = Metasyntax.add_notation

(***********)
(* Gallina *)

let start_proof_and_print k l hook =
  start_proof_com k l hook;
  print_subgoals ();
  if !pcoq <> None then (Option.get !pcoq).start_proof ()

let vernac_definition (local,boxed,k) (loc,id as lid) def hook =
  Dumpglob.dump_definition lid false "def";
  (match def with
    | ProveBody (bl,t) ->   (* local binders, typ *)
 	let hook _ _ = () in
 	  start_proof_and_print (local,DefinitionBody Definition)
	    [Some lid, (bl,t,None)] hook
    | DefineBody (bl,red_option,c,typ_opt) ->
 	let red_option = match red_option with
          | None -> None
          | Some r ->
	      let (evc,env)= get_current_context () in
 		Some (interp_redexp env evc r) in
	let ce,imps = interp_definition boxed bl red_option c typ_opt in
	declare_definition id (local,k) ce imps hook)

let vernac_start_proof kind l lettop hook =
  if Dumpglob.dump () then
    List.iter (fun (id, _) ->
      match id with
	| Some lid -> Dumpglob.dump_definition lid false "prf"
	| None -> ()) l;
  if not(refining ()) then
    if lettop then
      errorlabstrm "Vernacentries.StartProof"
	(str "Let declarations can only be used in proof editing mode.");
  start_proof_and_print (Global, Proof kind) l hook

let vernac_end_proof = function
  | Admitted -> admit ()
  | Proved (is_opaque,idopt) ->
    if not !Flags.print_emacs then if_verbose show_script ();
    match idopt with
    | None -> save_named is_opaque
    | Some ((_,id),None) -> save_anonymous is_opaque id
    | Some ((_,id),Some kind) -> save_anonymous_with_strength kind is_opaque id

  (* A stupid macro that should be replaced by ``Exact c. Save.'' all along
     the theories [??] *)

let vernac_exact_proof c =
  let pfs = top_of_tree (get_pftreestate()) in
  let pf = proof_of_pftreestate pfs in
    if (is_leaf_proof pf) then begin
      by (Tactics.exact_proof c);
      save_named true end
    else
      errorlabstrm "Vernacentries.ExactProof"
	(strbrk "Command 'Proof ...' can only be used at the beginning of the proof.")

let vernac_assumption kind l nl=
  if Pfedit.refining () then
    errorlabstrm ""
      (str "Cannot declare an assumption while in proof editing mode.");
  let global = fst kind = Global in
    List.iter (fun (is_coe,(idl,c)) ->
      if Dumpglob.dump () then
	List.iter (fun lid ->
	  if global then Dumpglob.dump_definition lid false "ax"
	  else Dumpglob.dump_definition lid true "var") idl;
      let t,imps = interp_assumption [] c in
      declare_assumptions idl is_coe kind t imps false nl) l

let vernac_record k finite infer struc binders sort nameopt cfs =
  let const = match nameopt with
    | None -> add_prefix "Build_" (snd (snd struc))
    | Some (_,id as lid) ->
	Dumpglob.dump_definition lid false "constr"; id in
    if Dumpglob.dump () then (
      Dumpglob.dump_definition (snd struc) false "rec";
      List.iter (fun ((_, x), _) ->
	match x with
	| Vernacexpr.AssumExpr ((loc, Name id), _) -> Dumpglob.dump_definition (loc,id) false "proj"
	| _ -> ()) cfs);
    ignore(Record.definition_structure (k,finite,infer,struc,binders,cfs,const,sort))

let vernac_inductive finite infer indl =
  if Dumpglob.dump () then
    List.iter (fun (((coe,lid), _, _, _, cstrs), _) ->
      match cstrs with
	| Constructors cstrs ->
	    Dumpglob.dump_definition lid false "ind";
	    List.iter (fun (_, (lid, _)) ->
			 Dumpglob.dump_definition lid false "constr") cstrs
	| _ -> () (* dumping is done by vernac_record (called below) *) )
      indl;
  match indl with
  | [ ( id , bl , c , b, RecordDecl (oc,fs) ), [] ] ->
      vernac_record (match b with Class true -> Class false | _ -> b)
	finite infer id bl c oc fs
  | [ ( id , bl , c , Class true, Constructors [l]), _ ] ->
      let f =
	let (coe, ((loc, id), ce)) = l in
	  ((coe, AssumExpr ((loc, Name id), ce)), [])
      in vernac_record (Class true) finite infer id bl c None [f]
  | [ ( id , bl , c , Class true, _), _ ] ->
      Util.error "Definitional classes must have a single method"
  | [ ( id , bl , c , Class false, Constructors _), _ ] ->
      Util.error "Inductive classes not supported"
  | [ ( _ , _ , _ , _, RecordDecl _ ) , _ ] ->
      Util.error "where clause not supported for (co)inductive records"
  | _ -> let unpack = function
      | ( (_, id) , bl , c , _ , Constructors l ) , ntn  -> ( id , bl , c , l ) , ntn
      | _ -> Util.error "Cannot handle mutually (co)inductive records."
    in
    let indl = List.map unpack indl in
    do_mutual_inductive indl (recursivity_flag_of_kind finite)

let vernac_fixpoint l b =
  if Dumpglob.dump () then
    List.iter (fun ((lid, _, _, _, _), _) -> Dumpglob.dump_definition lid false "def") l;
  do_fixpoint l b

let vernac_cofixpoint l b =
  if Dumpglob.dump () then
    List.iter (fun ((lid, _, _, _), _) -> Dumpglob.dump_definition lid false "def") l;
  do_cofixpoint l b

let vernac_scheme = Indschemes.do_scheme

let vernac_combined_scheme = Indschemes.do_combined_scheme

(**********************)
(* Modules            *)

let vernac_import export refl =
  let import ref =
    Library.import_module export (qualid_of_reference ref)
  in
    List.iter import refl;
    Lib.add_frozen_state ()

let vernac_declare_module export (loc, id) binders_ast mty_ast =
  (* We check the state of the system (in section, in module type)
     and what module information is supplied *)
  if Lib.sections_are_opened () then
    error "Modules and Module Types are not allowed inside sections.";
  let binders_ast = List.map
   (fun (export,idl,ty) ->
     if export <> None then
      error ("Arguments of a functor declaration cannot be exported. " ^
       "Remove the \"Export\" and \"Import\" keywords from every functor " ^
       "argument.")
     else (idl,ty)) binders_ast in
  let mp = Declaremods.declare_module
    Modintern.interp_modtype Modintern.interp_modexpr
    id binders_ast (Enforce mty_ast) []
  in
    Dumpglob.dump_moddef loc mp "mod";
    if_verbose message ("Module "^ string_of_id id ^" is declared");
    Option.iter (fun export -> vernac_import export [Ident (dummy_loc,id)]) export

let vernac_define_module export (loc, id) binders_ast mty_ast_o mexpr_ast_l =
  (* We check the state of the system (in section, in module type)
     and what module information is supplied *)
  if Lib.sections_are_opened () then
    error "Modules and Module Types are not allowed inside sections.";
  match mexpr_ast_l with
    | [] ->
       check_no_pending_proofs ();
       let binders_ast,argsexport =
        List.fold_right
         (fun (export,idl,ty) (args,argsexport) ->
           (idl,ty)::args, (List.map (fun (_,i) -> export,i)idl)@argsexport) binders_ast
             ([],[]) in
       let mp = Declaremods.start_module Modintern.interp_modtype export
	 id binders_ast mty_ast_o
       in
	 Dumpglob.dump_moddef loc mp "mod";
	 if_verbose message
	   ("Interactive Module "^ string_of_id id ^" started") ;
         List.iter
           (fun (export,id) ->
             Option.iter
               (fun export -> vernac_import export [Ident (dummy_loc,id)]) export
           ) argsexport
    | _::_ ->
       let binders_ast = List.map
        (fun (export,idl,ty) ->
          if export <> None then
           error ("Arguments of a functor definition can be imported only if" ^
                  " the definition is interactive. Remove the \"Export\" and " ^
                  "\"Import\" keywords from every functor argument.")
          else (idl,ty)) binders_ast in
       let mp =	Declaremods.declare_module
	  Modintern.interp_modtype Modintern.interp_modexpr
	  id binders_ast mty_ast_o mexpr_ast_l
       in
	 Dumpglob.dump_moddef loc mp "mod";
	 if_verbose message
	   ("Module "^ string_of_id id ^" is defined");
         Option.iter (fun export -> vernac_import export [Ident (dummy_loc,id)])
           export

let vernac_end_module export (loc,id as lid) =
  let mp = Declaremods.end_module () in
  Dumpglob.dump_modref loc mp "mod";
  if_verbose message ("Module "^ string_of_id id ^" is defined") ;
  Option.iter (fun export -> vernac_import export [Ident lid]) export

let vernac_declare_module_type (loc,id) binders_ast mty_sign mty_ast_l =
  if Lib.sections_are_opened () then
    error "Modules and Module Types are not allowed inside sections.";

  match mty_ast_l with
    | [] ->
       check_no_pending_proofs ();
       let binders_ast,argsexport =       
	 List.fold_right
         (fun (export,idl,ty) (args,argsexport) ->
           (idl,ty)::args, (List.map (fun (_,i) -> export,i)idl)@argsexport) binders_ast
             ([],[]) in
       
       let mp = Declaremods.start_modtype
	 Modintern.interp_modtype id binders_ast mty_sign in
        Dumpglob.dump_moddef loc mp "modtype";
	if_verbose message
	  ("Interactive Module Type "^ string_of_id id ^" started");
        List.iter
         (fun (export,id) ->
           Option.iter
            (fun export -> vernac_import export [Ident (dummy_loc,id)]) export
         ) argsexport

    | _ :: _ ->
	let binders_ast = List.map
          (fun (export,idl,ty) ->
            if export <> None then
              error ("Arguments of a functor definition can be imported only if" ^
			" the definition is interactive. Remove the \"Export\" " ^
			"and \"Import\" keywords from every functor argument.")
            else (idl,ty)) binders_ast in
	let mp = Declaremods.declare_modtype Modintern.interp_modtype
	  id binders_ast mty_sign mty_ast_l in
          Dumpglob.dump_moddef loc mp "modtype";
	  if_verbose message
	    ("Module Type "^ string_of_id id ^" is defined")

let vernac_end_modtype (loc,id) =
  let mp = Declaremods.end_modtype () in
  Dumpglob.dump_modref loc mp "modtype";
  if_verbose message ("Module Type "^ string_of_id id ^" is defined")

let vernac_include is_self = function
  | CIMTE (mty,mtys) ->
      Declaremods.declare_include
	Modintern.interp_modtype mty mtys false is_self
  | CIME (mexpr, mexprs) ->
      Declaremods.declare_include
	Modintern.interp_modexpr mexpr mexprs true is_self

(**********************)
(* Gallina extensions *)

(* Sections *)

let vernac_begin_section (_, id as lid) =
  check_no_pending_proofs ();
  Dumpglob.dump_definition lid true "sec";
  Lib.open_section id

let vernac_end_section (loc,_) =
  Dumpglob.dump_reference loc
    (string_of_dirpath (Lib.current_dirpath true)) "<>" "sec";
  Lib.close_section ()

(* Dispatcher of the "End" command *)

let vernac_end_segment (_,id as lid) =
  check_no_pending_proofs ();
  match Lib.find_opening_node id with
  | Lib.OpenedModule (export,_,_) -> vernac_end_module export lid
  | Lib.OpenedModtype _ -> vernac_end_modtype lid
  | Lib.OpenedSection _ -> vernac_end_section lid
  | _ -> anomaly "No more opened things"

(* Libraries *)

let vernac_require import _ qidl =
  let qidl = List.map qualid_of_reference qidl in
  let modrefl = Flags.silently (List.map Library.try_locate_qualified_library) qidl in
  if Dumpglob.dump () then
    List.iter2 (fun (loc, _) dp -> Dumpglob.dump_libref loc dp "lib") qidl (List.map fst modrefl);
  Library.require_library_from_dirpath modrefl import

(* Coercions and canonical structures *)

let vernac_canonical r =
  Recordops.declare_canonical_structure (smart_global r)

let vernac_coercion stre ref qids qidt =
  let target = cl_of_qualid qidt in
  let source = cl_of_qualid qids in
  let ref' = smart_global ref in
  Class.try_add_new_coercion_with_target ref' stre source target;
  if_verbose msgnl (pr_global ref' ++ str " is now a coercion")

let vernac_identity_coercion stre id qids qidt =
  let target = cl_of_qualid qidt in
  let source = cl_of_qualid qids in
  Class.try_add_new_identity_coercion id stre source target

(* Type classes *)

let vernac_instance glob sup inst props pri =
  Dumpglob.dump_constraint inst false "inst";
  ignore(Classes.new_instance ~global:glob sup inst props pri)

let vernac_context l =
  List.iter (fun x -> Dumpglob.dump_local_binder x true "var") l;
  Classes.context l

let vernac_declare_instance id =
  Dumpglob.dump_definition id false "inst";
  Classes.declare_instance false id

let vernac_declare_class id =
  Dumpglob.dump_definition id false "class";
  Classes.declare_class false id

(***********)
(* Solving *)
let vernac_solve n tcom b =
  if not (refining ()) then
    error "Unknown command of the non proof-editing mode.";
  Decl_mode.check_not_proof_mode "Unknown proof instruction";
  begin
    if b then
      solve_nth n (Tacinterp.hide_interp tcom (get_end_tac ()))
    else solve_nth n (Tacinterp.hide_interp tcom None)
  end;
  (* in case a strict subtree was completed,
     go back to the top of the prooftree *)
  if subtree_solved () then begin
    Flags.if_verbose msgnl (str "Subgoal proved");
    make_focus 0;
    reset_top_of_script ()
  end;
  print_subgoals();
  if !pcoq <> None then (Option.get !pcoq).solve n

  (* A command which should be a tactic. It has been
     added by Christine to patch an error in the design of the proof
     machine, and enables to instantiate existential variables when
     there are no more goals to solve. It cannot be a tactic since
     all tactics fail if there are no further goals to prove. *)

let vernac_solve_existential = instantiate_nth_evar_com

let vernac_set_end_tac tac =
  if not (refining ()) then
    error "Unknown command of the non proof-editing mode.";
  if tac <> (Tacexpr.TacId []) then set_end_tac (Tacinterp.interp tac) else ()
    (* TO DO verifier s'il faut pas mettre exist s | TacId s ici*)

(***********************)
(* Proof Language Mode *)

let vernac_decl_proof () =
  check_not_proof_mode "Already in Proof Mode";
  if tree_solved () then
    error "Nothing left to prove here."
  else
    begin
      Decl_proof_instr.go_to_proof_mode ();
      print_subgoals ()
    end

let vernac_return () =
  match get_current_mode () with
      Mode_tactic ->
	Decl_proof_instr.return_from_tactic_mode ();
	print_subgoals ()
    | Mode_proof ->
	error "\"return\" is only used after \"escape\"."
    | Mode_none ->
	error "There is no proof to end."

let vernac_proof_instr instr =
  Decl_proof_instr.proof_instr instr;
  print_subgoals ()

(*****************************)
(* Auxiliary file management *)

let vernac_require_from export spec filename =
  Library.require_library_from_file None
    (System.expand_path_macros filename)
    export

let vernac_add_loadpath isrec pdir ldiropt =
  let pdir = System.expand_path_macros pdir in
  let alias = match ldiropt with
    | None -> Nameops.default_root_prefix
    | Some ldir -> ldir in
  (if isrec then Mltop.add_rec_path else Mltop.add_path) pdir alias

let vernac_remove_loadpath path =
  Library.remove_load_path (System.expand_path_macros path)

  (* Coq syntax for ML or system commands *)

let vernac_add_ml_path isrec path =
  (if isrec then Mltop.add_rec_ml_dir else Mltop.add_ml_dir)
    (System.expand_path_macros path)

let vernac_declare_ml_module local l =
  Mltop.declare_ml_modules local (List.map System.expand_path_macros l)

let vernac_chdir = function
  | None -> message (Sys.getcwd())
  | Some path ->
      begin
	try Sys.chdir (System.expand_path_macros path)
	with Sys_error str -> warning ("Cd failed: " ^ str)
      end;
      if_verbose message (Sys.getcwd())


(********************)
(* State management *)

let abort_refine f x =
  if Pfedit.refining() then delete_all_proofs ();
  f x
  (* used to be: error "Must save or abort current goal first" *)

let vernac_write_state file = abort_refine States.extern_state file

let vernac_restore_state file = abort_refine States.intern_state file


(*************)
(* Resetting *)

let vernac_reset_name id = abort_refine Lib.reset_name id

let vernac_reset_initial () = abort_refine Lib.reset_initial ()

let vernac_back n = Lib.back n

let vernac_backto n = Lib.reset_label n

(* see also [vernac_backtrack] which combines undoing and resetting *)
(************)
(* Commands *)

let vernac_declare_tactic_definition (local,x,def) =
  Tacinterp.add_tacdef local x def

let vernac_create_hintdb local id b =
  Auto.create_hint_db local id full_transparent_state b

let vernac_hints local lb h = Auto.add_hints local lb (Auto.interp_hints h)

let vernac_syntactic_definition lid =
  Dumpglob.dump_definition lid false "syndef";
  Metasyntax.add_syntactic_definition (snd lid)

let vernac_declare_implicits local r = function
  | Some imps ->
      Impargs.declare_manual_implicits local (smart_global r) ~enriching:false
	(List.map (fun (ex,b,f) -> ex, (b,true,f)) imps)
  | None ->
      Impargs.declare_implicits local (smart_global r)

let vernac_reserve idl c =
  let t = Constrintern.interp_type Evd.empty (Global.env()) c in
  let t = Detyping.detype false [] [] t in
  List.iter (fun id -> Reserve.declare_reserved_type id t) idl

let vernac_generalizable = Implicit_quantifiers.declare_generalizable

let make_silent_if_not_pcoq b =
  if !pcoq <> None then
    error "Turning on/off silent flag is not supported in Pcoq mode."
  else make_silent b

let _ =
  declare_bool_option
    { optsync  = false;
      optname  = "silent";
      optkey   = ["Silent"];
      optread  = is_silent;
      optwrite = make_silent_if_not_pcoq }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "implicit arguments";
      optkey   = ["Implicit";"Arguments"];
      optread  = Impargs.is_implicit_args;
      optwrite = Impargs.make_implicit_args }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "strict implicit arguments";
      optkey   = ["Strict";"Implicit"];
      optread  = Impargs.is_strict_implicit_args;
      optwrite = Impargs.make_strict_implicit_args }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "strong strict implicit arguments";
      optkey   = ["Strongly";"Strict";"Implicit"];
      optread  = Impargs.is_strongly_strict_implicit_args;
      optwrite = Impargs.make_strongly_strict_implicit_args }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "contextual implicit arguments";
      optkey   = ["Contextual";"Implicit"];
      optread  = Impargs.is_contextual_implicit_args;
      optwrite = Impargs.make_contextual_implicit_args }

(* let _ = *)
(*   declare_bool_option  *)
(*     { optsync  = true; *)
(*       optname  = "forceable implicit arguments"; *)
(*       optkey   = ["Forceable";"Implicit")); *)
(*       optread  = Impargs.is_forceable_implicit_args; *)
(*       optwrite = Impargs.make_forceable_implicit_args } *)

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "implicit status of reversible patterns";
      optkey   = ["Reversible";"Pattern";"Implicit"];
      optread  = Impargs.is_reversible_pattern_implicit_args;
      optwrite = Impargs.make_reversible_pattern_implicit_args }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "maximal insertion of implicit";
      optkey   = ["Maximal";"Implicit";"Insertion"];
      optread  = Impargs.is_maximal_implicit_args;
      optwrite = Impargs.make_maximal_implicit_args }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "automatic introduction of variables";
      optkey   = ["Automatic";"Introduction"];
      optread  = Flags.is_auto_intros;
      optwrite = make_auto_intros }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "coercion printing";
      optkey   = ["Printing";"Coercions"];
      optread  = (fun () -> !Constrextern.print_coercions);
      optwrite = (fun b ->  Constrextern.print_coercions := b) }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "printing of existential variable instances";
      optkey   = ["Printing";"Existential";"Instances"];
      optread  = (fun () -> !Constrextern.print_evar_arguments);
      optwrite = (:=) Constrextern.print_evar_arguments }
let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "implicit arguments printing";
      optkey   = ["Printing";"Implicit"];
      optread  = (fun () -> !Constrextern.print_implicits);
      optwrite = (fun b ->  Constrextern.print_implicits := b) }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "implicit arguments defensive printing";
      optkey   = ["Printing";"Implicit";"Defensive"];
      optread  = (fun () -> !Constrextern.print_implicits_defensive);
      optwrite = (fun b ->  Constrextern.print_implicits_defensive := b) }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "projection printing using dot notation";
      optkey   = ["Printing";"Projections"];
      optread  = (fun () -> !Constrextern.print_projections);
      optwrite = (fun b ->  Constrextern.print_projections := b) }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "notations printing";
      optkey   = ["Printing";"Notations"];
      optread  = (fun () -> not !Constrextern.print_no_symbol);
      optwrite = (fun b ->  Constrextern.print_no_symbol := not b) }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "raw printing";
      optkey   = ["Printing";"All"];
      optread  = (fun () -> !Flags.raw_print);
      optwrite = (fun b -> Flags.raw_print := b) }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "use of virtual machine inside the kernel";
      optkey   = ["Virtual";"Machine"];
      optread  = (fun () -> Vconv.use_vm ());
      optwrite = (fun b -> Vconv.set_use_vm b) }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "use of boxed definitions";
      optkey   = ["Boxed";"Definitions"];
      optread  = Flags.boxed_definitions;
      optwrite = (fun b -> Flags.set_boxed_definitions b) }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "use of boxed values";
      optkey   = ["Boxed";"Values"];
      optread  = (fun _ -> not (Vm.transp_values ()));
      optwrite = (fun b -> Vm.set_transp_values (not b)) }

let _ =
  declare_int_option
    { optsync  = false;
      optname  = "the undo limit";
      optkey   = ["Undo"];
      optread  = Pfedit.get_undo;
      optwrite = Pfedit.set_undo }

let _ =
  declare_int_option
    { optsync  = false;
      optname  = "the hypotheses limit";
      optkey   = ["Hyps";"Limit"];
      optread  = Flags.print_hyps_limit;
      optwrite = Flags.set_print_hyps_limit }

let _ =
  declare_int_option
    { optsync  = true;
      optname  = "the printing depth";
      optkey   = ["Printing";"Depth"];
      optread  = Pp_control.get_depth_boxes;
      optwrite = Pp_control.set_depth_boxes }

let _ =
  declare_int_option
    { optsync  = true;
      optname  = "the printing width";
      optkey   = ["Printing";"Width"];
      optread  = Pp_control.get_margin;
      optwrite = Pp_control.set_margin }

let _ =
  declare_bool_option
    { optsync  = true;
      optname  = "printing of universes";
      optkey   = ["Printing";"Universes"];
      optread  = (fun () -> !Constrextern.print_universes);
      optwrite = (fun b -> Constrextern.print_universes:=b) }

let vernac_debug b =
  set_debug (if b then Tactic_debug.DebugOn 0 else Tactic_debug.DebugOff)

let _ =
  declare_bool_option
    { optsync  = false;
      optname  = "Ltac debug";
      optkey   = ["Ltac";"Debug"];
      optread  = (fun () -> get_debug () <> Tactic_debug.DebugOff);
      optwrite = vernac_debug }

let vernac_set_opacity local str =
  let glob_ref r =
    match smart_global r with
      | ConstRef sp -> EvalConstRef sp
      | VarRef id -> EvalVarRef id
      | _ -> error
          "cannot set an inductive type or a constructor as transparent" in
  let str = List.map (fun (lev,ql) -> (lev,List.map glob_ref ql)) str in
  Redexpr.set_strategy local str

let vernac_set_option locality key = function
  | StringValue s -> set_string_option_value_gen locality key s
  | IntValue n -> set_int_option_value_gen locality key (Some n)
  | BoolValue b -> set_bool_option_value_gen locality key b

let vernac_unset_option locality key =
  try set_bool_option_value_gen locality key false
  with _ ->
  set_int_option_value_gen locality key None

let vernac_add_option key lv =
  let f = function
    | StringRefValue s -> (get_string_table key)#add s
    | QualidRefValue locqid -> (get_ref_table key)#add locqid
  in
  try List.iter f lv with Not_found -> error_undeclared_key key

let vernac_remove_option key lv =
  let f = function
  | StringRefValue s -> (get_string_table key)#remove s
  | QualidRefValue locqid -> (get_ref_table key)#remove locqid
  in
  try List.iter f lv with Not_found -> error_undeclared_key key

let vernac_mem_option key lv =
  let f = function
  | StringRefValue s -> (get_string_table key)#mem s
  | QualidRefValue locqid -> (get_ref_table key)#mem locqid
  in
  try List.iter f lv with Not_found -> error_undeclared_key key

let vernac_print_option key =
  try (get_ref_table key)#print
  with Not_found ->
  try (get_string_table key)#print
  with Not_found ->
  try print_option_value key
  with Not_found -> error_undeclared_key key

let get_current_context_of_args = function
  | Some n -> get_goal_context n
  | None -> get_current_context ()

let vernac_check_may_eval redexp glopt rc =
  let (evmap,env) = get_current_context_of_args glopt in
  let c = interp_constr evmap env rc in
  let j = Typeops.typing env c in
  match redexp with
    | None ->
	if !pcoq <> None then (Option.get !pcoq).print_check env j
	else msg (print_judgment env j)
    | Some r ->
	let redfun = fst (reduction_of_red_expr (interp_redexp env evmap r)) in
	if !pcoq <> None
	then (Option.get !pcoq).print_eval redfun env evmap rc j
	else msg (print_eval redfun env evmap rc j)

  (* The same but avoiding the current goal context if any *)
let vernac_global_check c =
  let evmap = Evd.empty in
  let env = Global.env() in
  let c = interp_constr evmap env c in
  let senv = Global.safe_env() in
  let j = Safe_typing.typing senv c in
  msg (print_safe_judgment env j)

let vernac_print = function
  | PrintTables -> print_tables ()
  | PrintFullContext -> msg (print_full_context_typ ())
  | PrintSectionContext qid -> msg (print_sec_context_typ qid)
  | PrintInspect n -> msg (inspect n)
  | PrintGrammar ent -> Metasyntax.print_grammar ent
  | PrintLoadPath dir -> (* For compatibility ? *) print_loadpath dir
  | PrintModules -> msg (print_modules ())
  | PrintModule qid -> print_module qid
  | PrintModuleType qid -> print_modtype qid
  | PrintMLLoadPath -> Mltop.print_ml_path ()
  | PrintMLModules -> Mltop.print_ml_modules ()
  | PrintName qid ->
      if !pcoq <> None then (Option.get !pcoq).print_name qid
      else msg (print_name qid)
  | PrintGraph -> ppnl (Prettyp.print_graph())
  | PrintClasses -> ppnl (Prettyp.print_classes())
  | PrintTypeClasses -> ppnl (Prettyp.print_typeclasses())
  | PrintInstances c -> ppnl (Prettyp.print_instances (smart_global c))
  | PrintLtac qid -> ppnl (Tacinterp.print_ltac (snd (qualid_of_reference qid)))
  | PrintCoercions -> ppnl (Prettyp.print_coercions())
  | PrintCoercionPaths (cls,clt) ->
      ppnl (Prettyp.print_path_between (cl_of_qualid cls) (cl_of_qualid clt))
  | PrintCanonicalConversions -> ppnl (Prettyp.print_canonical_projections ())
  | PrintUniverses None -> pp (Univ.pr_universes (Global.universes ()))
  | PrintUniverses (Some s) -> dump_universes s
  | PrintHint r -> Auto.print_hint_ref (smart_global r)
  | PrintHintGoal -> Auto.print_applicable_hint ()
  | PrintHintDbName s -> Auto.print_hint_db_by_name s
  | PrintRewriteHintDbName s -> Autorewrite.print_rewrite_hintdb s
  | PrintHintDb -> Auto.print_searchtable ()
  | PrintScopes ->
      pp (Notation.pr_scopes (Constrextern.without_symbols pr_lrawconstr))
  | PrintScope s ->
      pp (Notation.pr_scope (Constrextern.without_symbols pr_lrawconstr) s)
  | PrintVisibility s ->
      pp (Notation.pr_visibility (Constrextern.without_symbols pr_lrawconstr) s)
  | PrintAbout qid -> msgnl (print_about qid)
  | PrintImplicit qid -> msg (print_impargs qid)
(*spiwack: prints all the axioms and section variables used by a term *)
  | PrintAssumptions (o,r) ->
      let cstr = constr_of_global (smart_global r) in
      let nassumptions = Environ.assumptions (Conv_oracle.get_transp_state ())
	~add_opaque:o cstr (Global.env ()) in
      msg (Printer.pr_assumptionset (Global.env ()) nassumptions)

let global_module r =
  let (loc,qid) = qualid_of_reference r in
  try Nametab.full_name_module qid
  with Not_found ->
    user_err_loc (loc, "global_module",
      str "Module/section " ++ pr_qualid qid ++ str " not found.")

let interp_search_restriction = function
  | SearchOutside l -> (List.map global_module l, true)
  | SearchInside l -> (List.map global_module l, false)

open Search

let is_ident s = try ignore (check_ident s); true with UserError _ -> false

let interp_search_about_item = function
  | SearchSubPattern pat ->
      let _,pat = intern_constr_pattern Evd.empty (Global.env()) pat in
      GlobSearchSubPattern pat
  | SearchString (s,None) when is_ident s ->
      GlobSearchString s
  | SearchString (s,sc) ->
      try
	let ref =
	  Notation.interp_notation_as_global_reference dummy_loc
	    (fun _ -> true) s sc in
	GlobSearchSubPattern (Pattern.PRef ref)
      with UserError _ ->
	error ("Unable to interp \""^s^"\" either as a reference or
          	as an identifier component")

let vernac_search s r =
  let r = interp_search_restriction r in
  if !pcoq <> None then (Option.get !pcoq).search s r else
  match s with
  | SearchPattern c ->
      let (_,c) = interp_open_constr_patvar Evd.empty (Global.env()) c in
      Search.search_pattern c r
  | SearchRewrite c ->
      let _,pat = interp_open_constr_patvar Evd.empty (Global.env()) c in
      Search.search_rewrite pat r
  | SearchHead c ->
      let _,pat = interp_open_constr_patvar Evd.empty (Global.env()) c in
      Search.search_by_head pat r
  | SearchAbout sl ->
      Search.search_about (List.map (on_snd interp_search_about_item) sl) r

let vernac_locate = function
  | LocateTerm (Genarg.AN qid) -> msgnl (print_located_qualid qid)
  | LocateTerm (Genarg.ByNotation (_,ntn,sc)) ->
      ppnl
        (Notation.locate_notation
          (Constrextern.without_symbols pr_lrawconstr) ntn sc)
  | LocateLibrary qid -> print_located_library qid
  | LocateModule qid -> print_located_module qid
  | LocateFile f -> locate_file f

(********************)
(* Proof management *)

let vernac_goal = function
  | None -> ()
  | Some c ->
      if not (refining()) then begin
        let unnamed_kind = Lemma (* Arbitrary *) in
        start_proof_com (Global, Proof unnamed_kind) [None,c] (fun _ _ ->());
	print_subgoals ()
      end else
	error "repeated Goal not permitted in refining mode."

let vernac_abort = function
  | None ->
      delete_current_proof ();
      if_verbose message "Current goal aborted";
      if !pcoq <> None then (Option.get !pcoq).abort ""
  | Some id ->
      delete_proof id;
      let s = string_of_id (snd id) in
      if_verbose message ("Goal "^s^" aborted");
      if !pcoq <> None then (Option.get !pcoq).abort s

let vernac_abort_all () =
  if refining() then begin
    delete_all_proofs ();
    message "Current goals aborted"
  end else
    error "No proof-editing in progress."

let vernac_restart () = restart_proof(); print_subgoals ()

  (* Proof switching *)

let vernac_suspend = suspend_proof

let vernac_resume = function
  | None -> resume_last_proof ()
  | Some id -> resume_proof id

let vernac_undo n =
  undo n;
  print_subgoals ()

(* backtrack with [naborts] abort, then undo_todepth to [pnum], then
   back-to state number [snum]. This allows to backtrack proofs and
   state with one command (easier for proofgeneral). *)
let vernac_backtrack snum pnum naborts =
  for i = 1 to naborts do vernac_abort None done;
  undo_todepth pnum;
  vernac_backto snum;
  Pp.flush_all();
  (* there may be no proof in progress, even if no abort *)
  (try print_subgoals () with UserError _ -> ())


let vernac_focus gln =
  check_not_proof_mode "No focussing or Unfocussing in Proof Mode.";
  match gln with
    | None -> traverse_nth_goal 1; print_subgoals ()
    | Some n -> traverse_nth_goal n; print_subgoals ()

  (* Reset the focus to the top of the tree *)
let vernac_unfocus () =
  check_not_proof_mode "No focussing or Unfocussing in Proof Mode.";
  make_focus 0; reset_top_of_script (); print_subgoals ()

let vernac_go = function
  | GoTo n -> Pfedit.traverse n;show_node()
  | GoTop -> Pfedit.reset_top_of_tree ();show_node()
  | GoNext -> Pfedit.traverse_next_unproven ();show_node()
  | GoPrev -> Pfedit.traverse_prev_unproven ();show_node()

let apply_subproof f occ =
  let pts = get_pftreestate() in
  let evc = evc_of_pftreestate pts in
  let rec aux pts = function
    | [] -> pts
    | (n::l) -> aux (Tacmach.traverse n pts) occ in
  let pts = aux pts (occ@[-1]) in
  let pf = proof_of_pftreestate pts in
  f evc (Global.named_context()) pf

let explain_proof occ =
  msg (apply_subproof (fun evd _ -> print_treescript evd) occ)

let explain_tree occ =
  msg (apply_subproof print_proof occ)

let vernac_show = function
  | ShowGoal nopt ->
      if !pcoq <> None then (Option.get !pcoq).show_goal nopt
      else msg (match nopt with
	| None -> pr_open_subgoals ()
	| Some n -> pr_nth_open_subgoal n)
  | ShowGoalImplicitly None ->
      Constrextern.with_implicits msg (pr_open_subgoals ())
  | ShowGoalImplicitly (Some n) ->
      Constrextern.with_implicits msg (pr_nth_open_subgoal n)
  | ShowProof -> show_proof ()
  | ShowNode -> show_node ()
  | ShowScript -> show_script ()
  | ShowExistentials -> show_top_evars ()
  | ShowTree -> show_prooftree ()
  | ShowProofNames ->
      msgnl (prlist_with_sep pr_spc pr_id (Pfedit.get_all_proof_names()))
  | ShowIntros all -> show_intro all
  | ShowMatch id -> show_match id
  | ShowThesis -> show_thesis ()
  | ExplainProof occ -> explain_proof occ
  | ExplainTree occ -> explain_tree occ


let vernac_check_guard () =
  let pts = get_pftreestate () in
  let pf = proof_of_pftreestate pts in
  let (pfterm,_) = extract_open_pftreestate pts in
  let message =
    try
      Inductiveops.control_only_guard (Evd.evar_env (goal_of_proof pf))
	pfterm;
      (str "The condition holds up to here")
    with UserError(_,s) ->
      (str ("Condition violated: ") ++s)
  in
  msgnl message

let interp c = match c with
  (* Control (done in vernac) *)
  | (VernacTime _ | VernacList _ | VernacLoad _| VernacTimeout _) ->
      assert false

  (* Syntax *)
  | VernacTacticNotation (n,r,e) -> Metasyntax.add_tactic_notation (n,r,e)
  | VernacSyntaxExtension (lcl,sl) -> vernac_syntax_extension lcl sl
  | VernacDelimiters (sc,lr) -> vernac_delimiters sc lr
  | VernacBindScope (sc,rl) -> vernac_bind_scope sc rl
  | VernacOpenCloseScope sc -> vernac_open_close_scope sc
  | VernacArgumentsScope (lcl,qid,scl) -> vernac_arguments_scope lcl qid scl
  | VernacInfix (local,mv,qid,sc) -> vernac_infix local mv qid sc
  | VernacNotation (local,c,infpl,sc) -> vernac_notation local c infpl sc

  (* Gallina *)
  | VernacDefinition (k,lid,d,f) -> vernac_definition k lid d f
  | VernacStartTheoremProof (k,l,top,f) -> vernac_start_proof k l top f
  | VernacEndProof e -> vernac_end_proof e
  | VernacExactProof c -> vernac_exact_proof c
  | VernacAssumption (stre,nl,l) -> vernac_assumption stre l nl
  | VernacInductive (finite,infer,l) -> vernac_inductive finite infer l
  | VernacFixpoint (l,b) -> vernac_fixpoint l b
  | VernacCoFixpoint (l,b) -> vernac_cofixpoint l b
  | VernacScheme l -> vernac_scheme l
  | VernacCombinedScheme (id, l) -> vernac_combined_scheme id l

  (* Modules *)
  | VernacDeclareModule (export,lid,bl,mtyo) ->
      vernac_declare_module export lid bl mtyo
  | VernacDefineModule (export,lid,bl,mtys,mexprl) ->
      vernac_define_module export lid bl mtys mexprl
  | VernacDeclareModuleType (lid,bl,mtys,mtyo) ->
      vernac_declare_module_type lid bl mtys mtyo
  | VernacInclude (is_self,in_asts) ->
      vernac_include is_self in_asts
  (* Gallina extensions *)
  | VernacBeginSection lid -> vernac_begin_section lid

  | VernacEndSegment lid -> vernac_end_segment lid

  | VernacRequire (export,spec,qidl) -> vernac_require export spec qidl
  | VernacImport (export,qidl) -> vernac_import export qidl
  | VernacCanonical qid -> vernac_canonical qid
  | VernacCoercion (str,r,s,t) -> vernac_coercion str r s t
  | VernacIdentityCoercion (str,(_,id),s,t) -> vernac_identity_coercion str id s t

  (* Type classes *)
  | VernacInstance (glob, sup, inst, props, pri) -> vernac_instance glob sup inst props pri
  | VernacContext sup -> vernac_context sup
  | VernacDeclareInstance id -> vernac_declare_instance id
  | VernacDeclareClass id -> vernac_declare_class id

  (* Solving *)
  | VernacSolve (n,tac,b) -> vernac_solve n tac b
  | VernacSolveExistential (n,c) -> vernac_solve_existential n c

  (* MMode *)

  | VernacDeclProof -> vernac_decl_proof ()
  | VernacReturn -> vernac_return ()
  | VernacProofInstr stp -> vernac_proof_instr stp

  (* /MMode *)

  (* Auxiliary file and library management *)
  | VernacRequireFrom (exp,spec,f) -> vernac_require_from exp spec f
  | VernacAddLoadPath (isrec,s,alias) -> vernac_add_loadpath isrec s alias
  | VernacRemoveLoadPath s -> vernac_remove_loadpath s
  | VernacAddMLPath (isrec,s) -> vernac_add_ml_path isrec s
  | VernacDeclareMLModule (local, l) -> vernac_declare_ml_module local l
  | VernacChdir s -> vernac_chdir s

  (* State management *)
  | VernacWriteState s -> vernac_write_state s
  | VernacRestoreState s -> vernac_restore_state s

  (* Resetting *)
  | VernacRemoveName id -> Lib.remove_name id
  | VernacResetName id -> vernac_reset_name id
  | VernacResetInitial -> vernac_reset_initial ()
  | VernacBack n -> vernac_back n
  | VernacBackTo n -> vernac_backto n

  (* Commands *)
  | VernacDeclareTacticDefinition def -> vernac_declare_tactic_definition def
  | VernacCreateHintDb (local,dbname,b) -> vernac_create_hintdb local dbname b
  | VernacHints (local,dbnames,hints) -> vernac_hints local dbnames hints
  | VernacSyntacticDefinition (id,c,l,b) ->vernac_syntactic_definition id c l b
  | VernacDeclareImplicits (local,qid,l) ->vernac_declare_implicits local qid l
  | VernacReserve (idl,c) -> vernac_reserve idl c
  | VernacGeneralizable (local,gen) -> vernac_generalizable local gen
  | VernacSetOpacity (local,qidl) -> vernac_set_opacity local qidl
  | VernacSetOption (locality,key,v) -> vernac_set_option locality key v
  | VernacUnsetOption (locality,key) -> vernac_unset_option locality key
  | VernacRemoveOption (key,v) -> vernac_remove_option key v
  | VernacAddOption (key,v) -> vernac_add_option key v
  | VernacMemOption (key,v) -> vernac_mem_option key v
  | VernacPrintOption key -> vernac_print_option key
  | VernacCheckMayEval (r,g,c) -> vernac_check_may_eval r g c
  | VernacGlobalCheck c -> vernac_global_check c
  | VernacPrint p -> vernac_print p
  | VernacSearch (s,r) -> vernac_search s r
  | VernacLocate l -> vernac_locate l
  | VernacComments l -> if_verbose message ("Comments ok\n")
  | VernacNop -> ()

  (* Proof management *)
  | VernacGoal t -> vernac_start_proof Theorem [None,([],t,None)] false (fun _ _->())
  | VernacAbort id -> vernac_abort id
  | VernacAbortAll -> vernac_abort_all ()
  | VernacRestart -> vernac_restart ()
  | VernacSuspend -> vernac_suspend ()
  | VernacResume id -> vernac_resume id
  | VernacUndo n -> vernac_undo n
  | VernacUndoTo n -> undo_todepth n
  | VernacBacktrack (snum,pnum,naborts) -> vernac_backtrack snum pnum naborts
  | VernacFocus n -> vernac_focus n
  | VernacUnfocus -> vernac_unfocus ()
  | VernacGo g -> vernac_go g
  | VernacShow s -> vernac_show s
  | VernacCheckGuard -> vernac_check_guard ()
  | VernacProof tac -> vernac_set_end_tac tac
  (* Toplevel control *)
  | VernacToplevelControl e -> raise e

  (* Extensions *)
  | VernacExtend (opn,args) -> Vernacinterp.call (opn,args)

let interp c = interp c ; check_locality ()