pretty.ml 20.1 KB
Newer Older
1 2 3
(**************************************************************************)
(*                                                                        *)
(*  Copyright (C) 2010-                                                   *)
MARCHE Claude's avatar
MARCHE Claude committed
4 5 6
(*    François Bobot                                                     *)
(*    Jean-Christophe Filliâtre                                          *)
(*    Claude Marché                                                      *)
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
(*    Andrei Paskevich                                                    *)
(*                                                                        *)
(*  This software is free software; you can redistribute it and/or        *)
(*  modify it under the terms of the GNU Library General Public           *)
(*  License version 2.1, with the special exception on linking            *)
(*  described in file LICENSE.                                            *)
(*                                                                        *)
(*  This software is distributed in the hope that it will be useful,      *)
(*  but WITHOUT ANY WARRANTY; without even the implied warranty of        *)
(*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                  *)
(*                                                                        *)
(**************************************************************************)

open Format
open Pp
open Util
open Ident
open Ty
open Term
Andrei Paskevich's avatar
Andrei Paskevich committed
26
open Decl
27
open Theory
Andrei Paskevich's avatar
Andrei Paskevich committed
28
open Task
29

30 31
let debug_print_labels = Debug.register_flag "print_labels"

32
let iprinter,tprinter,lprinter,pprinter =
33 34
  let bl = ["theory"; "type"; "logic"; "inductive"; "meta";
            "axiom"; "lemma"; "goal"; "use"; "clone"; "prop";
35 36 37 38 39
            "namespace"; "import"; "export"; "end";
            "forall"; "exists"; "and"; "or"; "not";
            "true"; "false"; "if"; "then"; "else";
            "let"; "in"; "match"; "with"; "as"; "epsilon" ]
  in
40 41 42 43 44
  let isanitize = sanitizer char_to_alpha char_to_alnumus in
  let lsanitize = sanitizer char_to_lalpha char_to_alnumus in
  let usanitize = sanitizer char_to_ualpha char_to_alnumus in
  create_ident_printer bl ~sanitizer:isanitize,
  create_ident_printer bl ~sanitizer:lsanitize,
Andrei Paskevich's avatar
Andrei Paskevich committed
45
  create_ident_printer bl ~sanitizer:isanitize,
46 47 48 49 50 51
  create_ident_printer bl ~sanitizer:usanitize

let forget_all () =
  forget_all iprinter;
  forget_all tprinter;
  forget_all lprinter;
52
  forget_all pprinter
53

54
let tv_set = ref Sid.empty
55

56 57
(* type variables always start with a quote *)
let print_tv fmt tv =
58
  tv_set := Sid.add tv.tv_name !tv_set;
59 60
  let sanitizer n = "'" ^ n in
  fprintf fmt "%s" (id_unique iprinter ~sanitizer tv.tv_name)
61

62 63 64 65 66 67
let forget_tvs () =
  Sid.iter (forget_id iprinter) !tv_set;
  tv_set := Sid.empty

(* logic variables always start with a lower case letter *)
let print_vs fmt vs =
68 69
  let sanitizer = String.uncapitalize in
  fprintf fmt "%s" (id_unique iprinter ~sanitizer vs.vs_name)
70

71
let forget_var vs = forget_id iprinter vs.vs_name
72

73 74 75 76 77 78 79 80 81 82 83 84 85 86
(* pretty-print infix and prefix logic symbols *)

let extract_op ls =
  let s = ls.ls_name.id_string in
  let len = String.length s in
  if len < 7 then None else
  let inf = String.sub s 0 6 in
  if inf = "infix "  then Some (String.sub s 6 (len - 6)) else
  let prf = String.sub s 0 7 in
  if prf = "prefix " then Some (String.sub s 7 (len - 7)) else
  None

let tight_op s = let c = String.sub s 0 1 in c = "!" || c = "?"

87 88 89 90 91
let escape_op s =
  let s = Str.replace_first (Str.regexp "^\\*.") " \\0" s in
  let s = Str.replace_first (Str.regexp ".\\*$") "\\0 " s in
  s

92 93
(* theory names always start with an upper case letter *)
let print_th fmt th =
94 95
  let sanitizer = String.capitalize in
  fprintf fmt "%s" (id_unique iprinter ~sanitizer th.th_name)
96

97 98
let print_ts fmt ts =
  fprintf fmt "%s" (id_unique tprinter ts.ts_name)
99

100
let print_ls fmt ls = match extract_op ls with
101
  | Some s -> fprintf fmt "(%s)" (escape_op s)
102
  | None   -> fprintf fmt "%s" (id_unique lprinter ls.ls_name)
103 104 105 106

let print_cs fmt ls =
  let sanitizer = String.capitalize in
  fprintf fmt "%s" (id_unique lprinter ~sanitizer ls.ls_name)
107

108
let print_pr fmt pr =
109
  fprintf fmt "%s" (id_unique pprinter pr.pr_name)
110 111 112

(** Types *)

113
let protect_on x s = if x then "(" ^^ s ^^ ")" else s
114

115
let rec print_ty_node inn fmt ty = match ty.ty_node with
116
  | Tyvar v -> print_tv fmt v
Andrei Paskevich's avatar
Andrei Paskevich committed
117 118
  | Tyapp (ts, tl) when is_ts_tuple ts -> fprintf fmt "(%a)"
      (print_list comma (print_ty_node false)) tl
119
  | Tyapp (ts, []) -> print_ts fmt ts
120 121 122 123
  | Tyapp (ts, tl) -> fprintf fmt (protect_on inn "%a@ %a")
      print_ts ts (print_list space (print_ty_node true)) tl

let print_ty = print_ty_node false
124 125 126 127 128 129 130 131 132 133

let print_const fmt = function
  | ConstInt s -> fprintf fmt "%s" s
  | ConstReal (RConstDecimal (i,f,None)) -> fprintf fmt "%s.%s" i f
  | ConstReal (RConstDecimal (i,f,Some e)) -> fprintf fmt "%s.%se%s" i f e
  | ConstReal (RConstHexa (i,f,e)) -> fprintf fmt "0x%s.%sp%s" i f e

(* can the type of a value be derived from the type of the arguments? *)
let unambig_fs fs =
  let rec lookup v ty = match ty.ty_node with
134
    | Tyvar u when tv_equal u v -> true
135 136 137 138 139 140 141 142 143 144 145
    | _ -> ty_any (lookup v) ty
  in
  let lookup v = List.exists (lookup v) fs.ls_args in
  let rec inspect ty = match ty.ty_node with
    | Tyvar u when not (lookup u) -> false
    | _ -> ty_all inspect ty
  in
  inspect (of_option fs.ls_value)

(** Patterns, terms, and formulas *)

Andrei Paskevich's avatar
Andrei Paskevich committed
146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
let rec print_pat_node pri fmt p = match p.pat_node with
  | Pwild ->
      fprintf fmt "_"
  | Pvar v ->
      print_vs fmt v
  | Pas (p, v) ->
      fprintf fmt (protect_on (pri > 1) "%a as %a")
        (print_pat_node 1) p print_vs v
  | Por (p, q) ->
      fprintf fmt (protect_on (pri > 0) "%a | %a")
        (print_pat_node 0) p (print_pat_node 0) q
  | Papp (cs, pl) when is_fs_tuple cs ->
      fprintf fmt (protect_on (pri > 0) "%a")
        (print_list comma (print_pat_node 1)) pl
  | Papp (cs, []) ->
      print_cs fmt cs
  | Papp (cs, pl) ->
      fprintf fmt (protect_on (pri > 1) "%a@ %a")
        print_cs cs (print_list space (print_pat_node 2)) pl

let print_pat = print_pat_node 0
167

168 169
let print_vsty fmt v =
  fprintf fmt "%a:@,%a" print_vs v print_ty v.vs_ty
170 171 172 173 174 175 176 177 178 179 180

let print_quant fmt = function
  | Fforall -> fprintf fmt "forall"
  | Fexists -> fprintf fmt "exists"

let print_binop fmt = function
  | Fand -> fprintf fmt "and"
  | For -> fprintf fmt "or"
  | Fimplies -> fprintf fmt "->"
  | Fiff -> fprintf fmt "<->"

181 182 183 184 185
let prio_binop = function
  | Fand -> 3
  | For -> 2
  | Fimplies -> 1
  | Fiff -> 1
186

187 188
let print_label fmt (l,_) =
  if l = "" then () else fprintf fmt "\"%s\"" l
189

Andrei Paskevich's avatar
Andrei Paskevich committed
190 191 192 193 194
let print_ident_labels fmt id =
  if Debug.test_flag debug_print_labels && id.id_label <> []
  then fprintf fmt " %a" (print_list space print_label) id.id_label
  else ()

195 196
let rec print_term fmt t = print_lterm 0 fmt t
and     print_fmla fmt f = print_lfmla 0 fmt f
197

198
and print_lterm pri fmt t = match t.t_label with
199 200
  | _ when Debug.nottest_flag debug_print_labels
       -> print_tnode pri fmt t
201 202 203
  | [] -> print_tnode pri fmt t
  | ll -> fprintf fmt (protect_on (pri > 0) "%a %a")
      (print_list space print_label) ll (print_tnode 0) t
204

205
and print_lfmla pri fmt f = match f.f_label with
206 207
  | _ when Debug.nottest_flag debug_print_labels
       -> print_fnode pri fmt f
208 209 210
  | [] -> print_fnode pri fmt f
  | ll -> fprintf fmt (protect_on (pri > 0) "%a %a")
      (print_list space print_label) ll (print_fnode 0) f
211

212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227
and print_app pri ls fmt tl = match extract_op ls, tl with
  | _, [] ->
      print_ls fmt ls
  | Some s, [t1] when tight_op s ->
      fprintf fmt (protect_on (pri > 6) "%s%a")
        s (print_lterm 6) t1
  | Some s, [t1] ->
      fprintf fmt (protect_on (pri > 4) "%s %a")
        s (print_lterm 5) t1
  | Some s, [t1;t2] ->
      fprintf fmt (protect_on (pri > 4) "%a %s@ %a")
        (print_lterm 5) t1 s (print_lterm 5) t2
  | _, tl ->
      fprintf fmt (protect_on (pri > 5) "%a@ %a")
        print_ls ls (print_list space (print_lterm 6)) tl

228
and print_tnode pri fmt t = match t.t_node with
229
  | Tvar v ->
230
      print_vs fmt v
231 232
  | Tconst c ->
      print_const fmt c
Andrei Paskevich's avatar
Andrei Paskevich committed
233 234
  | Tapp (fs, tl) when is_fs_tuple fs ->
      fprintf fmt "(%a)" (print_list comma print_term) tl
235
  | Tapp (fs, tl) when unambig_fs fs ->
236
      print_app pri fs fmt tl
237
  | Tapp (fs, tl) ->
238 239
      fprintf fmt (protect_on (pri > 0) "%a:%a")
        (print_app 5 fs) tl print_ty t.t_ty
240
  | Tif (f,t1,t2) ->
241
      fprintf fmt (protect_on (pri > 0) "if @[%a@] then %a@ else %a")
242
        print_fmla f print_term t1 print_term t2
243 244
  | Tlet (t1,tb) ->
      let v,t2 = t_open_bound tb in
245
      fprintf fmt (protect_on (pri > 0) "let %a = @[%a@] in@ %a")
246
        print_vs v (print_lterm 4) t1 print_term t2;
247
      forget_var v
Andrei Paskevich's avatar
Andrei Paskevich committed
248
  | Tcase (t1,bl) ->
249
      fprintf fmt "match @[%a@] with@\n@[<hov>%a@]@\nend"
Andrei Paskevich's avatar
Andrei Paskevich committed
250
        print_term t1 (print_list newline print_tbranch) bl
251 252
  | Teps fb ->
      let v,f = f_open_bound fb in
253 254
      fprintf fmt (protect_on (pri > 0) "epsilon %a.@ %a")
        print_vsty v print_fmla f;
255
      forget_var v
256

257
and print_fnode pri fmt f = match f.f_node with
258
  | Fapp (ps,tl) ->
259
      print_app pri ps fmt tl
260 261
  | Fquant (q,fq) ->
      let vl,tl,f = f_open_quant fq in
262
      fprintf fmt (protect_on (pri > 0) "%a %a%a.@ %a") print_quant q
263 264
        (print_list comma print_vsty) vl print_tl tl print_fmla f;
      List.iter forget_var vl
265 266 267 268 269
  | Ftrue ->
      fprintf fmt "true"
  | Ffalse ->
      fprintf fmt "false"
  | Fbinop (b,f1,f2) ->
270 271 272
      let p = prio_binop b in
      fprintf fmt (protect_on (pri > p) "%a %a@ %a")
        (print_lfmla (p + 1)) f1 print_binop b (print_lfmla p) f2
273
  | Fnot f ->
274
      fprintf fmt (protect_on (pri > 4) "not %a") (print_lfmla 4) f
275
  | Fif (f1,f2,f3) ->
276
      fprintf fmt (protect_on (pri > 0) "if @[%a@] then %a@ else %a")
277
        print_fmla f1 print_fmla f2 print_fmla f3
278 279
  | Flet (t,f) ->
      let v,f = f_open_bound f in
280
      fprintf fmt (protect_on (pri > 0) "let %a = @[%a@] in@ %a")
281
        print_vs v (print_lterm 4) t print_fmla f;
282
      forget_var v
Andrei Paskevich's avatar
Andrei Paskevich committed
283
  | Fcase (t,bl) ->
284
      fprintf fmt "match @[%a@] with@\n@[<hov>%a@]@\nend"
Andrei Paskevich's avatar
Andrei Paskevich committed
285
        print_term t (print_list newline print_fbranch) bl
286

287
and print_tbranch fmt br =
Andrei Paskevich's avatar
Andrei Paskevich committed
288 289 290
  let p,t = t_open_branch br in
  fprintf fmt "@[<hov 4>| %a ->@ %a@]" print_pat p print_term t;
  Svs.iter forget_var p.pat_vars
291

292
and print_fbranch fmt br =
Andrei Paskevich's avatar
Andrei Paskevich committed
293 294 295
  let p,f = f_open_branch br in
  fprintf fmt "@[<hov 4>| %a ->@ %a@]" print_pat p print_fmla f;
  Svs.iter forget_var p.pat_vars
296

297
and print_tl fmt tl =
298
  if tl = [] then () else fprintf fmt "@ [%a]"
299
    (print_list alt (print_list comma print_expr)) tl
300

301
and print_expr fmt = e_apply (print_term fmt) (print_fmla fmt)
302 303 304

(** Declarations *)

305 306 307 308
let print_tv_arg fmt tv = fprintf fmt "@ %a" print_tv tv
let print_ty_arg fmt ty = fprintf fmt "@ %a" (print_ty_node true) ty
let print_vs_arg fmt vs = fprintf fmt "@ (%a)" print_vsty vs

309 310 311 312
let print_constr ty fmt cs =
  let ty_val = of_option cs.ls_value in
  let m = ty_match Mtv.empty ty_val ty in
  let tl = List.map (ty_inst m) cs.ls_args in
313
  fprintf fmt "@[<hov 4>| %a%a@]" print_cs cs
314
    (print_list nothing print_ty_arg) tl
315

316
let print_type_decl fst fmt (ts,def) = match def with
317 318
  | Tabstract -> begin match ts.ts_def with
      | None ->
319 320
          fprintf fmt "@[<hov 2>%s %a%a@]"
            (if fst then "type" else "with") print_ts ts
321
            (print_list nothing print_tv_arg) ts.ts_args
322
      | Some ty ->
323 324
          fprintf fmt "@[<hov 2>%s %a%a =@ %a@]"
            (if fst then "type" else "with") print_ts ts
325
            (print_list nothing print_tv_arg) ts.ts_args print_ty ty
326 327
      end
  | Talgebraic csl ->
328
      let ty = ty_app ts (List.map ty_var ts.ts_args) in
329 330 331
      fprintf fmt "@[<hov 2>%s %a%a =@\n@[<hov>%a@]@]"
        (if fst then "type" else "with") print_ts ts
        (print_list nothing print_tv_arg) ts.ts_args
332
        (print_list newline (print_constr ty)) csl
333

334
let print_type_decl fst fmt d = print_type_decl fst fmt d; forget_tvs ()
335

336
let print_ls_type fmt = fprintf fmt " :@ %a" print_ty
337

338
let print_logic_decl fst fmt (ls,ld) = match ld with
339 340
  | Some ld ->
      let vl,e = open_ls_defn ld in
341 342 343
      fprintf fmt "@[<hov 2>%s %a%a%a =@ %a@]"
        (if fst then "logic" else "with") print_ls ls
        (print_list nothing print_vs_arg) vl
344 345 346
        (print_option print_ls_type) ls.ls_value print_expr e;
      List.iter forget_var vl
  | None ->
347 348 349
      fprintf fmt "@[<hov 2>%s %a%a%a@]"
        (if fst then "logic" else "with") print_ls ls
        (print_list nothing print_ty_arg) ls.ls_args
350 351
        (print_option print_ls_type) ls.ls_value

352
let print_logic_decl fst fmt d = print_logic_decl fst fmt d; forget_tvs ()
353

354
let print_ind fmt (pr,f) =
Andrei Paskevich's avatar
Andrei Paskevich committed
355 356
  fprintf fmt "@[<hov 4>| %a%a : %a@]"
    print_pr pr print_ident_labels pr.pr_name print_fmla f
357

358 359 360 361
let print_ind_decl fst fmt (ps,bl) =
  fprintf fmt "@[<hov 2>%s %a%a =@ @[<hov>%a@]@]"
    (if fst then "inductive" else "with") print_ls ps
    (print_list nothing print_ty_arg) ps.ls_args
362
    (print_list newline print_ind) bl;
363
  forget_tvs ()
364

365 366 367 368 369 370 371
let sprint_pkind = function
  | Paxiom -> "axiom"
  | Plemma -> "lemma"
  | Pgoal  -> "goal"
  | Pskip  -> "skip"

let print_pkind fmt k = pp_print_string fmt (sprint_pkind k)
372

373
let print_prop_decl fmt (k,pr,f) =
Andrei Paskevich's avatar
Andrei Paskevich committed
374 375
  fprintf fmt "@[<hov 2>%a %a%a : %a@]" print_pkind k
    print_pr pr print_ident_labels pr.pr_name print_fmla f;
376 377
  forget_tvs ()

378 379 380 381 382 383
let print_list_next sep print fmt = function
  | [] -> ()
  | [x] -> print true fmt x
  | x :: r -> print true fmt x; sep fmt ();
      print_list sep (print false) fmt r

384
let print_decl fmt d = match d.d_node with
385 386 387
  | Dtype tl  -> print_list_next newline print_type_decl fmt tl
  | Dlogic ll -> print_list_next newline print_logic_decl fmt ll
  | Dind il   -> print_list_next newline print_ind_decl fmt il
388 389
  | Dprop p   -> print_prop_decl fmt p

390 391 392 393 394 395 396
let print_next_type_decl  = print_type_decl false
let print_type_decl       = print_type_decl true
let print_next_logic_decl = print_logic_decl false
let print_logic_decl      = print_logic_decl true
let print_next_ind_decl   = print_ind_decl false
let print_ind_decl        = print_ind_decl true

397 398 399 400 401 402 403 404
let print_inst_ts fmt (ts1,ts2) =
  fprintf fmt "type %a = %a" print_ts ts1 print_ts ts2

let print_inst_ls fmt (ls1,ls2) =
  fprintf fmt "logic %a = %a" print_ls ls1 print_ls ls2

let print_inst_pr fmt (pr1,pr2) =
  fprintf fmt "prop %a = %a" print_pr pr1 print_pr pr2
405

406
let print_meta_arg_type fmt = function
407
  | MTty       -> fprintf fmt "[type]"
408 409 410 411 412 413
  | MTtysymbol -> fprintf fmt "[type symbol]"
  | MTlsymbol  -> fprintf fmt "[logic symbol]"
  | MTprsymbol -> fprintf fmt "[proposition]"
  | MTstring   -> fprintf fmt "[string]"
  | MTint      -> fprintf fmt "[integer]"

414
let print_meta_arg fmt = function
415
  | MAty ty -> fprintf fmt "type %a" print_ty ty
416 417 418 419 420
  | MAts ts -> fprintf fmt "type %a" print_ts ts
  | MAls ls -> fprintf fmt "logic %a" print_ls ls
  | MApr pr -> fprintf fmt "prop %a" print_pr pr
  | MAstr s -> fprintf fmt "\"%s\"" s
  | MAint i -> fprintf fmt "%d" i
421 422 423

let print_tdecl fmt td = match td.td_node with
  | Decl d ->
Andrei Paskevich's avatar
Andrei Paskevich committed
424
      print_decl fmt d
425
  | Use th ->
426
      fprintf fmt "@[<hov 2>(* use %a *)@]" print_th th
427
  | Clone (th,sm) when is_empty_sm sm ->
428
      fprintf fmt "@[<hov 2>(* use %a *)@]" print_th th
429 430 431 432
  | Clone (th,sm) ->
      let tm = Mts.fold (fun x y a -> (x,y)::a) sm.sm_ts [] in
      let lm = Mls.fold (fun x y a -> (x,y)::a) sm.sm_ls [] in
      let pm = Mpr.fold (fun x y a -> (x,y)::a) sm.sm_pr [] in
433
      fprintf fmt "@[<hov 2>(* clone %a with %a,@ %a,@ %a *)@]"
434 435 436
        print_th th (print_list comma print_inst_ts) tm
                    (print_list comma print_inst_ls) lm
                    (print_list comma print_inst_pr) pm
437
  | Meta (m,al) ->
438
      fprintf fmt "@[<hov 2>(* meta %s %a *)@]"
439
        m.meta_name (print_list comma print_meta_arg) al
440 441

let print_theory fmt th =
Andrei Paskevich's avatar
Andrei Paskevich committed
442 443 444
  fprintf fmt "@[<hov 2>theory %a%a@\n%a@]@\nend@."
    print_th th print_ident_labels th.th_name
    (print_list newline2 print_tdecl) th.th_decls
445

446
let print_task fmt task =
MARCHE Claude's avatar
MARCHE Claude committed
447
  forget_all ();
448 449
  fprintf fmt "@[<hov 2>theory Task@\n%a@]@\nend@."
    (print_list newline2 print_tdecl) (task_tdecls task)
450

451 452
module NsTree = struct
  type t =
453
    | Namespace of string * namespace * known_map
454 455
    | Leaf      of string

456 457
  let contents ns kn =
    let add_ns s ns acc = Namespace (s, ns, kn) :: acc in
458
    let add_pr s p  acc =
459 460
      let k, _ = find_prop_decl kn p in
      Leaf (sprint_pkind k ^ " " ^ s) :: acc in
461 462 463 464 465 466 467 468 469 470 471 472 473
    let add_ls s ls acc =
      if s = "infix ="  && ls_equal ls ps_equ then acc else
        Leaf ("logic " ^ s) :: acc
    in
    let add_ts s ts acc =
      if s = "int"  && ts_equal ts ts_int  then acc else
      if s = "real" && ts_equal ts ts_real then acc else
        Leaf ("type " ^ s) :: acc
    in
    let acc = Mnm.fold add_ns ns.ns_ns []  in
    let acc = Mnm.fold add_pr ns.ns_pr acc in
    let acc = Mnm.fold add_ls ns.ns_ls acc in
    let acc = Mnm.fold add_ts ns.ns_ts acc in acc
474 475

  let decomp = function
476 477
    | Namespace (s,ns,kn) -> s, contents ns kn
    | Leaf s              -> s, []
478 479
end

480
let print_namespace fmt name th =
Andrei Paskevich's avatar
Andrei Paskevich committed
481
  let module P = Print_tree.Make(NsTree) in
482
  fprintf fmt "@[<hov>%a@]@." P.print
483
    (NsTree.Namespace (name, th.th_export, th.th_known))
484

485 486 487 488 489 490 491 492 493 494 495 496
(* Exception reporting *)

let () = Exn_printer.register
  begin fun fmt exn -> match exn with
  | Ty.TypeMismatch (t1,t2) ->
      fprintf fmt "Type mismatch between %a and %a"
        print_ty t1 print_ty t2
  | Ty.BadTypeArity (ts, ts_arg, app_arg) ->
      fprintf fmt "Bad type arity: type symbol %a must be applied \
                   to %i arguments, but is applied to %i"
        print_ts ts ts_arg app_arg
  | Ty.DuplicateTypeVar tv ->
497 498 499
      fprintf fmt "Type variable %a is used twice" print_tv tv
  | Ty.UnboundTypeVar tv ->
      fprintf fmt "Unbound type variable: %a" print_tv tv
500 501 502 503
  | Term.BadArity (ls, ls_arg, app_arg) ->
      fprintf fmt "Bad arity: symbol %a must be applied \
                   to %i arguments, but is applied to %i"
        print_ls ls ls_arg app_arg
504 505
  | Term.EmptyCase ->
      fprintf fmt "Empty match expression"
506 507
  | Term.DuplicateVar vs ->
      fprintf fmt "Variable %a is used twice" print_vsty vs
Andrei Paskevich's avatar
Andrei Paskevich committed
508 509
  | Term.UncoveredVar vs ->
      fprintf fmt "Variable %a uncovered in \"or\"-pattern" print_vsty vs
510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525
  | Term.FunctionSymbolExpected ls ->
      fprintf fmt "Not a function symbol: %a" print_ls ls
  | Term.PredicateSymbolExpected ls ->
      fprintf fmt "Not a predicate symbol: %a" print_ls ls
  | Term.NoMatch ->
      fprintf fmt "Uncatched Term.NoMatch exception: [tf]_match failed"
  | Pattern.ConstructorExpected ls ->
      fprintf fmt "The symbol %a is not a constructor"
        print_ls ls
  | Pattern.NonExhaustive pl ->
      fprintf fmt "Non-exhaustive pattern list:@\n@[<hov 2>%a@]"
        (print_list newline print_pat) pl
  | Decl.IllegalTypeAlias ts ->
      fprintf fmt
        "Type symbol %a is a type alias and cannot be declared as algebraic"
        print_ts ts
526 527
  | Decl.NonFoundedTypeDecl ts ->
      fprintf fmt "Cannot construct a value of type %a" print_ts ts
528 529 530 531
  | Decl.NonPositiveTypeDecl (_ts, ls, ts1) ->
      fprintf fmt "Constructor %a \
          contains a non strictly positive occurrence of type symbol %a"
        print_ls ls print_ts ts1
532
  | Decl.InvalidIndDecl (_ls, pr) ->
533
      fprintf fmt "Ill-formed inductive clause %a"
534 535
        print_pr pr
  | Decl.NonPositiveIndDecl (_ls, pr, ls1) ->
536 537
      fprintf fmt "Inductive clause %a contains \
          a negative occurrence of symbol %a"
538
        print_pr pr print_ls ls1
539 540 541
  | Decl.BadLogicDecl (ls1,ls2) ->
      fprintf fmt "Ill-formed definition: symbols %a and %a are different"
        print_ls ls1 print_ls ls2
542 543
  | Decl.UnboundVar vs ->
      fprintf fmt "Unbound variable: %a" print_vsty vs
544 545 546 547
  | Decl.ClashIdent id ->
      fprintf fmt "Ident %s is defined twice" id.id_string
  | Decl.EmptyDecl ->
      fprintf fmt "Empty declaration"
548 549 550 551
  | Decl.EmptyAlgDecl ts ->
      fprintf fmt "Algebraic type %a has no constructors" print_ts ts
  | Decl.EmptyIndDecl ls ->
      fprintf fmt "Inductive predicate %a has no constructors" print_ls ls
552 553 554 555 556 557 558
  | Decl.KnownIdent id ->
      fprintf fmt "Ident %s is already declared" id.id_string
  | Decl.UnknownIdent id ->
      fprintf fmt "Ident %s is not yet declared" id.id_string
  | Decl.RedeclaredIdent id ->
      fprintf fmt "Ident %s is already declared, with a different declaration"
        id.id_string
559 560
  | Decl.NoTerminationProof ls ->
      fprintf fmt "Cannot prove the termination of %a" print_ls ls
561
  | Decl.NonExhaustiveExpr (pl, e) ->
562 563
      fprintf fmt "Pattern @[%a@] is not covered in expression:@\n  @[%a@]"
        (print_list comma print_pat) pl print_expr e
564 565 566
  | _ -> raise exn
  end