aboutsummaryrefslogtreecommitdiffhomepage
path: root/parsing/pptactic.ml
blob: d24de567501ac85cd1bb79c3b172863efa8af67d (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
(***********************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team    *)
(* <O___,, *        INRIA-Rocquencourt  &  LRI-CNRS-Orsay              *)
(*   \VV/  *************************************************************)
(*    //   *      This file is distributed under the terms of the      *)
(*         *       GNU Lesser General Public License Version 2.1       *)
(***********************************************************************)

(* $Id$ *)

open Pp
open Names
open Nameops
open Util
open Extend
open Tacexpr
open Rawterm
open Topconstr
open Genarg
open Libnames
open Pattern

let pr_red_expr = Ppconstr.pr_red_expr
let pr_may_eval = Ppconstr.pr_may_eval
let pr_sort = Ppconstr.pr_sort
let pr_global = Ppconstr.pr_global Idset.empty
let pr_name = Ppconstr.pr_name
let pr_opt = Ppconstr.pr_opt
let pr_occurrences = Ppconstr.pr_occurrences

type grammar_terminals = string option list

  (* Extensions *)
let prtac_tab_v7 = Hashtbl.create 17
let prtac_tab = Hashtbl.create 17

let declare_extra_tactic_pprule for_v8 s (tags,prods) =
  Hashtbl.add prtac_tab_v7 (s,tags) prods;
  if for_v8 then Hashtbl.add prtac_tab (s,tags) prods

type 'a raw_extra_genarg_printer =
    (constr_expr -> std_ppcmds) -> (raw_tactic_expr -> std_ppcmds) ->
      'a -> std_ppcmds
type 'a glob_extra_genarg_printer =
    (rawconstr_and_expr -> std_ppcmds) -> (glob_tactic_expr -> std_ppcmds) ->
      'a -> std_ppcmds
type 'a extra_genarg_printer =
    (Term.constr -> std_ppcmds) -> (glob_tactic_expr -> std_ppcmds) ->
      'a -> std_ppcmds

let genarg_pprule_v7 = ref Stringmap.empty
let genarg_pprule = ref Stringmap.empty

let declare_extra_genarg_pprule for_v8 (rawwit, f) (globwit, g) (wit, h) =
  let s = match unquote wit with
    | ExtraArgType s -> s 
    | _ -> error
	"Can declare a pretty-printing rule only for extra argument types"
  in
  let f prc prtac x = f prc prtac (out_gen rawwit x) in
  let g prc prtac x = g prc prtac (out_gen globwit x) in
  let h prc prtac x = h prc prtac (out_gen wit x) in
  genarg_pprule_v7 := Stringmap.add s (f,g,h) !genarg_pprule_v7;
  if for_v8 then
    genarg_pprule := Stringmap.add s (f,g,h) !genarg_pprule 

let pi1 (a,_,_) = a
let pi2 (_,a,_) = a
let pi3 (_,_,a) = a

let pr_arg pr x = spc () ++ pr x

let pr_or_var pr = function
  | ArgArg x -> pr x
  | ArgVar (_,s) -> pr_id s

let pr_or_metaid pr = function
  | AI x -> pr x
  | _ -> failwith "pr_hyp_location: unexpected quotation meta-variable"

let pr_and_short_name pr (c,_) = pr c

let pr_located pr (loc,x) = pr x

let pr_ltac_constant sp = pr_qualid (Nametab.shortest_qualid_of_tactic sp)

let pr_evaluable_reference = function 
  | EvalVarRef id -> pr_id id
  | EvalConstRef sp -> pr_global (Libnames.ConstRef sp)

let pr_inductive ind = pr_global (Libnames.IndRef ind)

let pr_quantified_hypothesis = function
  | AnonHyp n -> int n
  | NamedHyp id -> pr_id id 

let pr_quantified_hypothesis_arg h = spc () ++ pr_quantified_hypothesis h

let pr_binding prc = function
  | loc, NamedHyp id, c -> hov 1 (pr_id id ++ str " := " ++ cut () ++ prc c)
  | loc, AnonHyp n, c -> hov 1 (int n ++ str " := " ++ cut () ++ prc c)

let pr_bindings prc prlc = function
  | ImplicitBindings l ->
      brk (1,1) ++ str "with" ++ brk (1,1) ++
      prlist_with_sep spc prc l
  | ExplicitBindings l ->
      brk (1,1) ++ str "with" ++ brk (1,1) ++ 
        prlist_with_sep spc
          (fun b -> if Options.do_translate () or not !Options.v7 then
	    str"(" ++ pr_binding prlc b ++ str")" 
	   else
	    pr_binding prc b)
        l
  | NoBindings -> mt ()

let pr_with_bindings prc prlc (c,bl) = 
  prc c ++ hv 0 (pr_bindings prc prlc bl)

let rec pr_intro_pattern = function
  | IntroOrAndPattern pll ->
      str "[" ++
      hv 0 (prlist_with_sep pr_bar (prlist_with_sep spc pr_intro_pattern) pll)
      ++ str "]"
  | IntroWildcard -> str "_"
  | IntroIdentifier id -> pr_id id

let pr_with_names = function
  | [] -> mt ()
  | ids -> spc () ++ str "as [" ++
      hv 0 (prlist_with_sep (fun () -> spc () ++ str "| ")
              (prlist_with_sep spc pr_intro_pattern) ids ++ str "]")

let pr_hyp_location pr_id = function
  | InHyp id -> spc () ++ pr_id id
  | InHypType id -> spc () ++ str "(Type of " ++ pr_id id ++ str ")"

let pr_clause pr_id = function
  | [] -> mt ()
  | l -> spc () ++ hov 0 (str "in" ++ prlist (pr_hyp_location pr_id) l)

let pr_clause_pattern pr_id = function
  | (None, []) -> mt ()
  | (glopt,l) ->
      str " in" ++
      prlist
        (fun (id,nl) -> prlist (pr_arg int) nl 
	  ++ spc () ++ pr_id id) l ++
        pr_opt (fun nl -> prlist_with_sep spc int nl ++ str " Goal") glopt

let pr_subterms pr occl =
  hov 0 (pr_occurrences pr occl ++ spc () ++ str "with")

let pr_induction_arg prc = function
  | ElimOnConstr c -> prc c
  | ElimOnIdent (_,id) -> pr_id id
  | ElimOnAnonHyp n -> int n

let pr_match_pattern pr_pat = function
  | Term a -> pr_pat a
  | Subterm (None,a) -> str "[" ++ pr_pat a ++ str "]"
  | Subterm (Some id,a) -> pr_id id ++ str "[" ++ pr_pat a ++ str "]"

let pr_match_hyps pr_pat = function
  | Hyp ((_,na),mp) -> pr_name na ++ str ":" ++ pr_match_pattern pr_pat mp

let pr_match_rule m pr_pat pr = function
  | Pat ([],mp,t) when m ->
      str "[" ++ pr_match_pattern pr_pat mp ++ str "]"
      ++ spc () ++ str "->" ++ brk (1,2) ++ pr t
  | Pat (rl,mp,t) ->
      str "[" ++ prlist_with_sep pr_semicolon
                   (pr_match_hyps pr_pat) rl ++ spc () ++ 
      str "|-" ++ spc () ++ pr_match_pattern pr_pat mp ++ spc () ++ str "]" ++
      spc () ++ str "->" ++ brk (1,2) ++ pr t
  | All t -> str "_" ++ spc () ++ str "->" ++ brk (1,2) ++ pr t

let pr_funvar = function
  | None -> spc () ++ str "()"
  | Some id -> spc () ++ pr_id id

let pr_let_clause k pr = function
  | ((_,id),None,t) -> hv 0(str k ++ pr_id id ++ str " =" ++ brk (1,1) ++ pr t)
  | ((_,id),Some c,t) -> str "TODO(LETCLAUSE)"

let pr_let_clauses pr = function
  | hd::tl ->
      hv 0
        (pr_let_clause "Let " pr hd ++
         prlist (fun t -> spc () ++ pr_let_clause "And " pr t) tl)
  | [] -> anomaly "LetIn must declare at least one binding"

let pr_rec_clause pr ((_,id),(l,t)) =
  pr_id id ++ prlist pr_funvar l ++ str "->" ++ spc () ++ pr t

let pr_rec_clauses pr l = 
  prlist_with_sep (fun () -> fnl () ++ str "And ") (pr_rec_clause pr) l

let pr_hintbases = function
  | None -> spc () ++ str "with *"
  | Some [] -> mt ()
  | Some l ->
      spc () ++ str "with" ++ hv 0 (prlist (fun s -> spc () ++ str s) l)

let pr_autoarg_adding = function
  | [] -> mt ()
  | l ->
      spc () ++ str "Adding [" ++
        hv 0 (prlist_with_sep spc pr_reference l) ++ str "]"

let pr_autoarg_destructing = function
  | true -> spc () ++ str "Destructing"
  | false -> mt ()

let pr_autoarg_usingTDB = function
  | true -> spc () ++ str "Using TDB"
  | false -> mt ()

let rec pr_raw_generic prc prlc prtac prref x =
  match Genarg.genarg_tag x with
  | BoolArgType -> pr_arg str (if out_gen rawwit_bool x then "true" else "false")
  | IntArgType -> pr_arg int (out_gen rawwit_int x)
  | IntOrVarArgType -> pr_arg (pr_or_var pr_int) (out_gen rawwit_int_or_var x)
  | StringArgType -> spc () ++ str "\"" ++ str (out_gen rawwit_string x) ++ str "\""
  | PreIdentArgType -> pr_arg str (out_gen rawwit_pre_ident x)
  | IdentArgType -> pr_arg pr_id (out_gen rawwit_ident x)
  | RefArgType -> pr_arg prref (out_gen rawwit_ref x)
  | SortArgType -> pr_arg pr_sort (out_gen rawwit_sort x)
  | ConstrArgType -> pr_arg prc (out_gen rawwit_constr x)
  | ConstrMayEvalArgType ->
      pr_arg (pr_may_eval prc prref)
        (out_gen rawwit_constr_may_eval x)
  | QuantHypArgType ->
      pr_arg pr_quantified_hypothesis (out_gen rawwit_quant_hyp x)
  | RedExprArgType ->
      pr_arg (pr_red_expr 
        (prc,prref)) (out_gen rawwit_red_expr x)
  | TacticArgType -> pr_arg prtac (out_gen rawwit_tactic x)
  | CastedOpenConstrArgType ->
      pr_arg prc (out_gen rawwit_casted_open_constr x)
  | ConstrWithBindingsArgType -> 
      pr_arg (pr_with_bindings prc prlc) (out_gen rawwit_constr_with_bindings x)
  | List0ArgType _ -> 
      hov 0 (fold_list0 (fun x a -> pr_raw_generic prc prlc prtac prref x ++ a) x (mt()))
  | List1ArgType _ ->
      hov 0 (fold_list1 (fun x a -> pr_raw_generic prc prlc prtac prref x ++ a) x (mt()))
  | OptArgType _ -> hov 0 (fold_opt (pr_raw_generic prc prlc prtac prref) (mt()) x)
  | PairArgType _ ->
      hov 0
        (fold_pair
	  (fun a b -> pr_raw_generic prc prlc prtac prref a ++ spc () ++ 
            pr_raw_generic prc prlc prtac prref b)
	  x)
  | ExtraArgType s -> 
      let tab =
	if Options.do_translate() or not !Options.v7 then !genarg_pprule
        else !genarg_pprule_v7 in
      try pi1 (Stringmap.find s tab) prc prtac x
      with Not_found -> str " [no printer for " ++ str s ++ str "] "


let rec pr_glob_generic prc prlc prtac x =
  match Genarg.genarg_tag x with
  | BoolArgType -> pr_arg str (if out_gen globwit_bool x then "true" else "false")
  | IntArgType -> pr_arg int (out_gen globwit_int x)
  | IntOrVarArgType -> pr_arg (pr_or_var pr_int) (out_gen globwit_int_or_var x)
  | StringArgType -> spc () ++ str "\"" ++ str (out_gen globwit_string x) ++ str "\""
  | PreIdentArgType -> pr_arg str (out_gen globwit_pre_ident x)
  | IdentArgType -> pr_arg pr_id (out_gen globwit_ident x)
  | RefArgType -> pr_arg (pr_or_var (pr_located pr_global)) (out_gen globwit_ref x)
  | SortArgType -> pr_arg pr_sort (out_gen globwit_sort x)
  | ConstrArgType -> pr_arg prc (out_gen globwit_constr x)
  | ConstrMayEvalArgType ->
      pr_arg (pr_may_eval prc
        (pr_or_var (pr_and_short_name pr_evaluable_reference))) (out_gen globwit_constr_may_eval x)
  | QuantHypArgType ->
      pr_arg pr_quantified_hypothesis (out_gen globwit_quant_hyp x)
  | RedExprArgType ->
      pr_arg (pr_red_expr 
        (prc,pr_or_var (pr_and_short_name pr_evaluable_reference))) (out_gen globwit_red_expr x)
  | TacticArgType -> pr_arg prtac (out_gen globwit_tactic x)
  | CastedOpenConstrArgType ->
      pr_arg prc (out_gen globwit_casted_open_constr x)
  | ConstrWithBindingsArgType -> 
      pr_arg (pr_with_bindings prc prlc) (out_gen globwit_constr_with_bindings x)
  | List0ArgType _ -> 
      hov 0 (fold_list0 (fun x a -> pr_glob_generic prc prlc prtac x ++ a) x (mt()))
  | List1ArgType _ ->
      hov 0 (fold_list1 (fun x a -> pr_glob_generic prc prlc prtac x ++ a) x (mt()))
  | OptArgType _ -> hov 0 (fold_opt (pr_glob_generic prc prlc prtac) (mt()) x)
  | PairArgType _ ->
      hov 0
        (fold_pair
	  (fun a b -> pr_glob_generic prc prlc prtac a ++ spc () ++ 
            pr_glob_generic prc prlc prtac b)
	  x)
  | ExtraArgType s -> 
      let tab =
	if Options.do_translate() or not !Options.v7 then !genarg_pprule
        else !genarg_pprule_v7 in
      try pi2 (Stringmap.find s tab) prc prtac x
      with Not_found -> str " [no printer for " ++ str s ++ str "] "

open Closure

let rec pr_generic prc prlc prtac x =
  match Genarg.genarg_tag x with
  | BoolArgType -> pr_arg str (if out_gen wit_bool x then "true" else "false")
  | IntArgType -> pr_arg int (out_gen wit_int x)
  | IntOrVarArgType -> pr_arg (pr_or_var pr_int) (out_gen wit_int_or_var x)
  | StringArgType -> spc () ++ str "\"" ++ str (out_gen wit_string x) ++ str "\""
  | PreIdentArgType -> pr_arg str (out_gen wit_pre_ident x)
  | IdentArgType -> pr_arg pr_id (out_gen wit_ident x)
  | RefArgType -> pr_arg pr_global (out_gen wit_ref x)
  | SortArgType -> pr_arg prc (Term.mkSort (out_gen wit_sort x))
  | ConstrArgType -> pr_arg prc (out_gen wit_constr x)
  | ConstrMayEvalArgType ->
      pr_arg prc (out_gen wit_constr_may_eval x)
  | QuantHypArgType ->
      pr_arg pr_quantified_hypothesis (out_gen wit_quant_hyp x)
  | RedExprArgType ->
      pr_arg (pr_red_expr (prc,pr_evaluable_reference)) (out_gen wit_red_expr x)
  | TacticArgType -> pr_arg prtac (out_gen wit_tactic x)
  | CastedOpenConstrArgType ->
      pr_arg prc (snd (out_gen wit_casted_open_constr x))
  | ConstrWithBindingsArgType -> 
      pr_arg (pr_with_bindings prc prlc) (out_gen wit_constr_with_bindings x)
  | List0ArgType _ -> 
      hov 0 (fold_list0 (fun x a -> pr_generic prc prlc prtac x ++ a) x (mt()))
  | List1ArgType _ ->
      hov 0 (fold_list1 (fun x a -> pr_generic prc prlc prtac x ++ a) x (mt()))
  | OptArgType _ -> hov 0 (fold_opt (pr_generic prc prlc prtac) (mt()) x)
  | PairArgType _ ->
      hov 0
        (fold_pair
	  (fun a b -> pr_generic prc prlc prtac a ++ spc () ++ 
            pr_generic prc prlc prtac b)
	  x)
  | ExtraArgType s -> 
      let tab = 
	if Options.do_translate() or not !Options.v7 then !genarg_pprule
        else !genarg_pprule_v7 in
      try pi3 (Stringmap.find s tab) prc prtac x
      with Not_found -> str " [no printer for " ++ str s ++ str "]"

let rec pr_tacarg_using_rule pr_gen = function
  | Some s :: l, al -> spc () ++ str s ++ pr_tacarg_using_rule pr_gen (l,al)
  | None :: l, a :: al -> pr_gen a ++ pr_tacarg_using_rule  pr_gen (l,al)
  | [], [] -> mt ()
  | _ -> failwith "Inconsistent arguments of extended tactic"

let pr_extend_gen prgen s l =
  let tab = 
    if Options.do_translate() or not !Options.v7 then prtac_tab
    else prtac_tab_v7
  in
  try 
    let tags = List.map genarg_tag l in
    let (s,pl) = Hashtbl.find tab (s,tags) in
    str s ++ pr_tacarg_using_rule prgen (pl,l)
  with Not_found ->
    str s ++ prlist prgen l ++ str " (* Generic printer *)"

let make_pr_tac (pr_tac,pr_tac0,pr_constr,pr_pat,pr_cst,pr_ind,pr_ref,pr_ident,pr_extend) =

let pr_bindings = pr_bindings pr_constr pr_constr in
let pr_with_bindings = pr_with_bindings pr_constr pr_constr in
let pr_eliminator cb = str "using" ++ pr_arg (pr_with_bindings) cb in
let pr_constrarg c = spc () ++ pr_constr c in
let pr_intarg n = spc () ++ int n in

  (* Printing tactics as arguments *)
let rec pr_atom0 = function
  | TacIntroPattern [] -> str "Intros"
  | TacIntroMove (None,None) -> str "Intro"
  | TacAssumption -> str "Assumption"
  | TacAnyConstructor None -> str "Constructor"
  | TacTrivial (Some []) -> str "Trivial"
  | TacAuto (None,Some []) -> str "Auto"
  | TacAutoTDB None -> str "AutoTDB"
  | TacDestructConcl -> str "DConcl"
  | TacReflexivity -> str "Reflexivity"
  | TacSymmetry None -> str "Symmetry"
  | t -> str "(" ++ pr_atom1 t ++ str ")"

  (* Main tactic printer *)
and pr_atom1 = function
  | TacExtend (_,s,l) -> pr_extend pr_constr pr_constr pr_tac s l
  | TacAlias (_,s,l,_) ->
      pr_extend pr_constr pr_constr pr_tac s (List.map snd l)

  (* Basic tactics *)
  | TacIntroPattern [] as t -> pr_atom0 t
  | TacIntroPattern (_::_ as p) -> 
      hov 1 (str "Intros" ++ spc () ++ prlist_with_sep spc pr_intro_pattern p)
  | TacIntrosUntil h ->
      hv 1 (str "Intros until" ++ pr_arg pr_quantified_hypothesis h)
  | TacIntroMove (None,None) as t -> pr_atom0 t
  | TacIntroMove (Some id1,None) -> str "Intro " ++ pr_id id1
  | TacIntroMove (ido1,Some (_,id2)) ->
      hov 1
      (str "Intro" ++ pr_opt pr_id ido1 ++ spc () ++ str "after " ++ pr_id id2)
  | TacAssumption as t -> pr_atom0 t
  | TacExact c -> hov 1 (str "Exact" ++ pr_arg pr_constr c)
  | TacApply cb -> hov 1 (str "Apply" ++ spc () ++ pr_with_bindings cb)
  | TacElim (cb,cbo) ->
      hov 1 (str "Elim" ++ pr_arg pr_with_bindings cb ++ 
        pr_opt pr_eliminator cbo)
  | TacElimType c -> hov 1 (str "ElimType" ++ pr_arg pr_constr c)
  | TacCase cb -> hov 1 (str "Case" ++ spc () ++ pr_with_bindings cb)
  | TacCaseType c -> hov 1 (str "CaseType" ++ pr_arg pr_constr c)
  | TacFix (ido,n) -> hov 1 (str "Fix" ++ pr_opt pr_id ido ++ pr_intarg n)
  | TacMutualFix (id,n,l) ->
      hov 1 (str "Cofix" ++ spc () ++ pr_id id ++ pr_intarg n ++ spc () ++
        hov 0 (str "with" ++ brk (1,1) ++
          prlist_with_sep spc
	    (fun (id,n,c) ->
	      spc () ++ pr_id id ++ pr_intarg n ++ pr_arg pr_constr c)
	  l))
  | TacCofix ido -> hov 1 (str "Cofix" ++ pr_opt pr_id ido)
  | TacMutualCofix (id,l) ->
      hov 1 (str "Cofix" ++ spc () ++ pr_id id ++ spc () ++
        hov 0 (str "with" ++ brk (1,1) ++
          prlist (fun (id,c) -> spc () ++ pr_id id ++ pr_arg pr_constr c)
	  l))
  | TacCut c -> hov 1 (str "Cut" ++ pr_arg pr_constr c)
  | TacTrueCut (None,c) -> 
      hov 1 (str "Assert" ++ pr_arg pr_constr c)
  | TacTrueCut (Some id,c) -> 
      hov 1 (str "Assert" ++ spc () ++ pr_id id ++ str ":" ++ pr_constr c)
  | TacForward (false,na,c) ->
      hov 1 (str "Assert" ++ pr_arg pr_name na ++ str ":=" ++ pr_constr c)
  | TacForward (true,na,c) ->
      hov 1 (str "Pose" ++ pr_arg pr_name na ++ str ":=" ++ pr_constr c)
  | TacGeneralize l ->
      hov 1 (str "Generalize" ++ spc () ++ prlist_with_sep spc pr_constr l)
  | TacGeneralizeDep c ->
      hov 1 (str "Generalize" ++ spc () ++ str "Dependent" ++ spc () ++
      pr_constr c)
  | TacLetTac (id,c,cl) ->
      hov 1 (str "LetTac" ++ spc () ++ pr_id id ++ str ":=" ++
        pr_constr c ++ pr_clause_pattern pr_ident cl)
  | TacInstantiate (n,c) ->
      hov 1 (str "Instantiate" ++ pr_arg int n ++ pr_arg pr_constr c)

  (* Derived basic tactics *)
  | TacOldInduction h ->
      hov 1 (str "Induction" ++ pr_arg pr_quantified_hypothesis h)
  | TacNewInduction (h,e,ids) ->
      hov 1 (str "NewInduction" ++ spc () ++ pr_induction_arg pr_constr h ++
        pr_opt pr_eliminator e ++ pr_with_names ids)
  | TacOldDestruct h ->
      hov 1 (str "Destruct" ++ pr_arg pr_quantified_hypothesis h)
  | TacNewDestruct (h,e,ids) ->
      hov 1 (str "NewDestruct" ++ spc () ++ pr_induction_arg pr_constr h ++
        pr_opt pr_eliminator e ++ pr_with_names ids)
  | TacDoubleInduction (h1,h2) ->
      hov 1
        (str "Double Induction" ++ 
         pr_arg pr_quantified_hypothesis h1 ++
 	 pr_arg pr_quantified_hypothesis h2)
  | TacDecomposeAnd c ->
      hov 1 (str "Decompose Record" ++ pr_arg pr_constr c)
  | TacDecomposeOr c ->
      hov 1 (str "Decompose Sum" ++ pr_arg pr_constr c)
  | TacDecompose (l,c) ->
      hov 1 (str "Decompose" ++ spc () ++
        hov 0 (str "[" ++ prlist_with_sep spc pr_ind l
	  ++ str "]"))
  | TacSpecialize (n,c) ->
      hov 1 (str "Specialize" ++ pr_opt int n ++ pr_with_bindings c)
  | TacLApply c -> 
      hov 1 (str "LApply" ++ pr_constr c)

  (* Automation tactics *)
  | TacTrivial (Some []) as x -> pr_atom0 x
  | TacTrivial db -> hov 0 (str "Trivial" ++ pr_hintbases db)
  | TacAuto (None,Some []) as x -> pr_atom0 x
  | TacAuto (n,db) -> hov 0 (str "Auto" ++ pr_opt int n ++ pr_hintbases db)
  | TacAutoTDB None as x -> pr_atom0 x
  | TacAutoTDB (Some n) -> hov 0 (str "AutoTDB" ++ spc () ++ int n)
  | TacDestructHyp (true,(_,id)) -> hov 0 (str "CDHyp" ++ spc () ++ pr_id id)
  | TacDestructHyp (false,(_,id)) -> hov 0 (str "DHyp" ++ spc () ++ pr_id id)
  | TacDestructConcl as x -> pr_atom0 x
  | TacSuperAuto (n,l,b1,b2) ->
      hov 1 (str "SuperAuto" ++ pr_opt int n ++ pr_autoarg_adding l ++ 
             pr_autoarg_destructing b1 ++ pr_autoarg_usingTDB b2)
  | TacDAuto (n,p) ->
      hov 1 (str "Auto" ++ pr_opt int n ++ str "Decomp" ++ pr_opt int p)

  (* Context management *)
  | TacClear l ->
      hov 1 (str "Clear" ++ spc () ++ prlist_with_sep spc pr_ident l)
  | TacClearBody l ->
      hov 1 (str "Clear" ++ spc () ++ prlist_with_sep spc pr_ident l)
  | TacMove (b,id1,id2) ->
      (* Rem: only b = true is available for users *)
      assert b;
      hov 1
        (str "Move" ++ brk (1,1) ++ pr_ident id1 ++ spc () ++ 
	 str "after" ++ brk (1,1) ++ pr_ident id2)
  | TacRename (id1,id2) ->
      hov 1
        (str "Rename" ++ brk (1,1) ++ pr_ident id1 ++ spc () ++ 
	 str "into" ++ brk (1,1) ++ pr_ident id2)

  (* Constructors *)
  | TacLeft l -> hov 1 (str "Left" ++ pr_bindings l)
  | TacRight l -> hov 1 (str "Right" ++ pr_bindings l)
  | TacSplit (_,l) -> hov 1 (str "Split" ++ pr_bindings l)
  | TacAnyConstructor (Some t) ->
      hov 1 (str "Constructor" ++ pr_arg pr_tac0 t)
  | TacAnyConstructor None as t -> pr_atom0 t
  | TacConstructor (n,l) ->
      hov 1 (str "Constructor" ++ pr_or_metaid pr_intarg n ++ pr_bindings l)

  (* Conversion *)  
  | TacReduce (r,h) ->
      hov 1 (pr_red_expr (pr_constr,pr_cst) r ++ pr_clause pr_ident h)
  | TacChange (occl,c,h) ->
      hov 1 (str "Change" ++ pr_opt (pr_subterms pr_constr) occl ++ 
        brk (1,1) ++ pr_constr c ++ pr_clause pr_ident h)

  (* Equivalence relations *)
  | (TacReflexivity | TacSymmetry None) as x -> pr_atom0 x
  | TacSymmetry (Some id) -> str "Symmetry " ++ pr_ident id
  | TacTransitivity c -> str "Transitivity" ++ pr_arg pr_constr c

and pr_tactic_seq_body tl = 
  hv 0 (str "[ " ++
        prlist_with_sep (fun () -> spc () ++ str "| ") prtac tl ++ str " ]")

  (* Strictly closed atomic tactic expressions *)
and pr0 = function
  | TacFirst tl -> str "First" ++ spc () ++ pr_tactic_seq_body tl
  | TacSolve tl -> str "Solve" ++ spc () ++ pr_tactic_seq_body tl
  | TacId -> str "Idtac"
  | TacFail (0,"") -> str "Fail"
  | TacAtom (_,t) -> pr_atom0 t
  | TacArg c -> pr_tacarg c
  | t -> str "(" ++ prtac t ++ str ")"

  (* Semi-closed atomic tactic expressions *)
and pr1 = function
  | TacAtom (_,t) -> pr_atom1 t
  | TacFail (0,s) -> str "Fail \"" ++ str s ++ str "\""
  | TacFail (n,"") -> str "Fail " ++ int n
  | TacFail (n,s) -> str "Fail " ++ int n ++ str " \"" ++ str s ++ str "\""
  | t -> pr0 t

  (* Orelse tactic expressions (printed as if parsed associating on the right
     though the semantics is purely associative) *)
and pr2 = function
  | TacOrelse (t1,t2) ->
      hov 1 (pr1 t1 ++ str " Orelse" ++ brk (1,1) ++ pr3 t2)
  | t -> pr1 t

  (* Non closed prefix tactic expressions *)
and pr3 = function
  | TacTry t -> hov 1 (str "Try" ++ spc () ++ pr3 t)
  | TacDo (n,t) -> hov 1 (str "Do " ++ int n ++ spc () ++ pr3 t)
  | TacRepeat t -> hov 1 (str "Repeat" ++ spc () ++ pr3 t)
  | TacProgress t -> hov 1 (str "Progress" ++ spc () ++ pr3 t)
  | TacInfo t -> hov 1 (str "Info" ++ spc () ++ pr3 t)
  | t -> pr2 t

and pr4 = function
  | t -> pr3 t

  (* THEN and THENS tactic expressions (printed as if parsed
     associating on the left though the semantics is purely associative) *)
and pr5 = function
  | TacThens (t,tl) -> 
      hov 1 (pr5 t ++ str ";" ++ spc () ++ pr_tactic_seq_body tl)
  | TacThen (t1,t2) ->
      hov 1 (pr5 t1 ++ str ";" ++ spc () ++ pr4 t2)
  | t -> pr4 t

  (* Ltac tactic expressions *)
and pr6 = function
  |(TacAtom _
  | TacThen _
  | TacThens _
  | TacFirst _
  | TacSolve _
  | TacTry _
  | TacOrelse _
  | TacDo _
  | TacRepeat _
  | TacProgress _
  | TacId
  | TacFail _
  | TacInfo _) as t -> pr5 t

  | TacAbstract (t,None) -> str "Abstract " ++ pr6 t
  | TacAbstract (t,Some s) -> 
      hov 0
       (str "Abstract " ++ pr6 t ++ spc () ++ str "using" ++ spc () ++ pr_id s)
  | TacLetRecIn (l,t) -> 
      hv 0
        (str "Rec " ++ pr_rec_clauses prtac l ++
        spc () ++ str "In" ++ fnl () ++ prtac t)
  | TacLetIn (llc,u) ->
      v 0
       (hv 0 (pr_let_clauses pr_tacarg0 llc ++ spc () ++ str "In") ++ fnl () ++ prtac u)
  | TacLetCut llc ->
      pr_let_clauses pr_tacarg0
        (List.map (fun (id,c,t) -> ((dummy_loc,id),Some c,t)) llc)
      ++ fnl ()
  | TacMatch (t,lrul) ->
      hov 0 (str "Match" ++ spc () ++ pr_may_eval pr_constr pr_cst t ++ spc()
        ++ str "With"
        ++ prlist
	  (fun r -> fnl () ++ str "|" ++ spc () ++
            pr_match_rule true pr_pat prtac r)
	lrul)
  | TacMatchContext (lr,lrul) ->
      hov 0 (
	str (if lr then "Match Reverse Context With" else "Match Context With")
	++ prlist
	  (fun r -> fnl () ++ str "|" ++ spc () ++
            pr_match_rule false pr_pat prtac r)
	lrul)
  | TacFun (lvar,body) ->
      hov 0 (str "Fun" ++
        prlist pr_funvar lvar ++ spc () ++ str "->" ++ spc () ++ prtac body)

  | TacArg c -> pr_tacarg c

and pr_tacarg0 = function
  | TacDynamic (_,t) -> str ("<dynamic ["^(Dyn.tag t)^"]>")
  | MetaIdArg (_,s) -> str ("$" ^ s)
  | Identifier id -> pr_id id
  | TacVoid -> str "()"
  | Reference r -> pr_ref r
  | ConstrMayEval (ConstrTerm c) -> str "'" ++ pr_constr c
  | ConstrMayEval c -> pr_may_eval pr_constr pr_cst c
  | Integer n -> int n
  | TacFreshId sopt -> str "FreshId" ++ pr_opt qstring sopt
  | (TacCall _ | Tacexp _) as t -> str "(" ++ pr_tacarg1 t ++ str ")"

and pr_tacarg1 = function
  | TacCall (_,f,l) ->
      hov 0 (pr_ref f ++ spc () ++ prlist_with_sep spc pr_tacarg0 l)
  | Tacexp t -> pr_tac t
  | t -> pr_tacarg0 t

and pr_tacarg x = pr_tacarg1 x

and prtac x = pr6 x

in (prtac,pr0,pr_match_rule false pr_pat pr_tac)

let pr_raw_extend prc prlc prtac = 
  pr_extend_gen (pr_raw_generic prc prlc prtac pr_reference)
let pr_glob_extend prc prlc prtac =
  pr_extend_gen (pr_glob_generic prc prlc prtac)
let pr_extend prc prlc prtac =
  pr_extend_gen (pr_generic prc prlc prtac)

let pr_and_constr_expr pr (c,_) = pr c

let rec glob_printers =
    (pr_glob_tactic, 
     pr_glob_tactic0,
     pr_and_constr_expr Ppconstr.pr_rawconstr,
     Printer.pr_pattern,
     pr_or_var (pr_and_short_name pr_evaluable_reference),
     pr_or_var pr_inductive,
     pr_or_var (pr_located pr_ltac_constant),
     pr_located pr_id,
     pr_glob_extend)

and pr_glob_tactic (t:glob_tactic_expr) = pi1 (make_pr_tac glob_printers) t

and pr_glob_tactic0 t = pi2 (make_pr_tac glob_printers) t

and pr_glob_match_context t = pi3 (make_pr_tac glob_printers) t

let (pr_tactic,_,_) =
  make_pr_tac
    (pr_glob_tactic,
     pr_glob_tactic0,
     Printer.prterm,
     Printer.pr_pattern,
     pr_evaluable_reference,
     pr_inductive,
     pr_ltac_constant,
     pr_id,
     pr_extend)