1 (* Copyright (C) 2004, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
28 let critical_value = 7
31 module StringSet = Set.Make (String)
32 module SetSet = Set.Make (StringSet)
34 type term_signature = (string * string list) option * StringSet.t
36 type cardinality_condition =
40 let tbln n = "table" ^ string_of_int n
43 let add_depth_constr depth_opt cur_tbl where =
46 | Some depth -> (sprintf "%s.h_depth = %d" cur_tbl depth) :: where
49 let mk_positions positions cur_tbl =
54 let pos_str = MetadataPp.pp_position_tag pos in
59 | `MainConclusion None
60 | `MainHypothesis None ->
61 sprintf "%s.h_position = \"%s\"" cur_tbl pos_str
62 | `MainConclusion (Some d)
63 | `MainHypothesis (Some d) ->
64 sprintf "(%s.h_position = \"%s\" and %s.h_depth = %d)"
65 cur_tbl pos_str cur_tbl d)
66 (positions :> MetadataTypes.position list)) ^
69 let add_card_constr tbl (n,from,where) = function
70 | None -> (n,from,where)
72 let cur_tbl = tbln n in
74 (sprintf "%s as %s" tbl cur_tbl :: from),
75 (sprintf "%s.no=%d" cur_tbl card ::
77 else [sprintf "table0.source = %s.source" cur_tbl]) @
80 let cur_tbl = tbln n in
82 (sprintf "%s as %s" tbl cur_tbl :: from),
83 (sprintf "%s.no>%d" cur_tbl card ::
85 else [sprintf "table0.source = %s.source" cur_tbl]) @
88 let at_least ~(dbd:Mysql.dbd) ?concl_card ?full_card
89 (metadata: MetadataTypes.constr list)
91 if (metadata = []) && concl_card = None && full_card = None then
92 failwith "MetadataQuery.at_least: no constraints given";
93 let add_constraint (n,from,where) metadata =
94 let cur_tbl = tbln n in
96 | `Obj (uri, positions) ->
97 let tbl = MetadataTypes.obj_tbl in
98 let from = (sprintf "%s as %s" tbl cur_tbl) :: from in
100 (sprintf "%s.h_occurrence = \"%s\"" cur_tbl uri) ::
101 mk_positions positions cur_tbl ::
103 else [sprintf "table0.source = %s.source" cur_tbl]) @
108 let tbl = MetadataTypes.rel_tbl in
109 let from = (sprintf "%s as %s" tbl cur_tbl) :: from in
111 mk_positions positions cur_tbl ::
113 else [sprintf "table0.source = %s.source" cur_tbl]) @
117 | `Sort (sort, positions) ->
118 let tbl = MetadataTypes.sort_tbl in
119 let sort_str = MetadataPp.pp_sort sort in
120 let from = (sprintf "%s as %s" tbl cur_tbl) :: from in
122 (sprintf "%s.h_sort = \"%s\"" cur_tbl sort_str) ::
123 mk_positions positions cur_tbl ::
125 else [sprintf "table0.source = %s.source" cur_tbl]) @
130 let (n,from,where) = List.fold_left add_constraint (0,[],[]) metadata in
132 add_card_constr MetadataTypes.conclno_tbl (n,from,where) concl_card
135 add_card_constr MetadataTypes.conclno_hyp_tbl (n,from,where) full_card
137 let from = String.concat ", " from in
138 let where = String.concat " and " where in
139 let query = sprintf "select table0.source from %s where %s" from where in
140 let result = Mysql.exec dbd query in
142 (fun row -> match row.(0) with Some s -> s | _ -> assert false)
144 (** Prefix handling *)
146 let filter_by_card n =
147 SetSet.filter (fun t -> (StringSet.cardinal t) <= n)
150 let init = SetSet.union a b in
151 let merge_single_set s1 b =
153 (fun s2 res -> SetSet.add (StringSet.union s1 s2) res)
156 SetSet.fold (fun s1 res -> SetSet.union (merge_single_set s1 b) res) a init
160 let rec inspect_children n childs =
162 (fun res term -> merge n (inspect_conclusion n term) res)
165 and add_root n root childs =
166 let childunion = inspect_children n childs in
167 let addroot = StringSet.add root in
169 (fun child newsets -> SetSet.add (addroot child) newsets)
171 (SetSet.singleton (StringSet.singleton root))
173 and inspect_conclusion n t =
174 if n = 0 then SetSet.empty
179 | Cic.Implicit _ -> SetSet.empty
180 | Cic.Var (u,exp_named_subst) -> SetSet.empty
181 | Cic.Const (u,exp_named_subst) ->
182 SetSet.singleton (StringSet.singleton (UriManager.string_of_uri u))
183 | Cic.MutInd (u, t, exp_named_subst) ->
184 SetSet.singleton (StringSet.singleton
185 (UriManager.string_of_uriref (u, [t])))
186 | Cic.MutConstruct (u, t, c, exp_named_subst) ->
187 SetSet.singleton (StringSet.singleton
188 (UriManager.string_of_uriref (u, [t; c])))
189 | Cic.Cast (t, _) -> inspect_conclusion n t
190 | Cic.Prod (_, s, t) ->
191 merge n (inspect_conclusion n s) (inspect_conclusion n t)
192 | Cic.Lambda (_, s, t) ->
193 merge n (inspect_conclusion n s) (inspect_conclusion n t)
194 | Cic.LetIn (_, s, t) ->
195 merge n (inspect_conclusion n s) (inspect_conclusion n t)
196 | Cic.Appl ((Cic.Const (u,exp_named_subst))::l) ->
197 let suri = UriManager.string_of_uri u in
198 add_root (n-1) suri l
199 | Cic.Appl ((Cic.MutInd (u, t, exp_named_subst))::l) ->
200 let suri = UriManager.string_of_uriref (u, [t]) in
201 add_root (n-1) suri l
202 | Cic.Appl ((Cic.MutConstruct (u, t, c, exp_named_subst))::l) ->
203 let suri = UriManager.string_of_uriref (u, [t; c]) in
204 add_root (n-1) suri l
207 | Cic.MutCase (u, t, tt, uu, m) ->
211 | Cic.CoFix (_, m) ->
214 let rec inspect_term n t =
222 | Cic.Implicit _ -> None, SetSet.empty
223 | Cic.Var (u,exp_named_subst) -> None, SetSet.empty
224 | Cic.Const (u,exp_named_subst) ->
225 Some (UriManager.string_of_uri u), SetSet.empty
226 | Cic.MutInd (u, t, exp_named_subst) ->
227 let uri = UriManager.string_of_uriref (u, [t]) in
228 Some uri, SetSet.empty
229 | Cic.MutConstruct (u, t, c, exp_named_subst) ->
230 let uri = UriManager.string_of_uriref (u, [t; c]) in
231 Some uri, SetSet.empty
232 | Cic.Cast (t, _) -> inspect_term n t
233 | Cic.Prod (_, _, t) -> inspect_term n t
234 | Cic.LetIn (_, _, t) -> inspect_term n t
235 | Cic.Appl ((Cic.Const (u,exp_named_subst))::l) ->
236 let suri = UriManager.string_of_uri u in
237 let childunion = inspect_children (n-1) l in
238 Some suri, childunion
239 | Cic.Appl ((Cic.MutInd (u, t, exp_named_subst))::l) ->
240 let suri = UriManager.string_of_uriref (u, [t]) in
241 if u = HelmLibraryObjects.Logic.eq_URI && n>1 then
242 (* equality is handled in a special way: in particular,
243 the type, if defined, is always added to the prefix,
244 and n is not decremented - it should have been n-2 *)
246 Cic.Const (u1,exp_named_subst1)::l1 ->
247 let suri1 = UriManager.string_of_uri u1 in
248 let inconcl = add_root (n-1) suri1 l1 in
250 | Cic.MutInd (u1, t1, exp_named_subst1)::l1 ->
251 let suri1 = UriManager.string_of_uriref (u1, [t1]) in
252 let inconcl = add_root (n-1) suri1 l1 in
254 | Cic.MutConstruct (u1, t1, c1, exp_named_subst1)::l1 ->
255 let suri1 = UriManager.string_of_uriref (u1, [t1; c1]) in
256 let inconcl = add_root (n-1) suri1 l1 in
258 | _ :: _ -> Some suri, SetSet.empty
259 | _ -> assert false (* args number must be > 0 *)
261 let childunion = inspect_children (n-1) l in
262 Some suri, childunion
263 | Cic.Appl ((Cic.MutConstruct (u, t, c, exp_named_subst))::l) ->
264 let suri = UriManager.string_of_uriref (u, [t; c]) in
265 let childunion = inspect_children (n-1) l in
266 Some suri, childunion
267 | _ -> None, SetSet.empty
269 let add_cardinality s =
270 let l = SetSet.elements s in
274 let el = StringSet.elements set in
275 (List.length el, el)) l in
276 (* ordered by descending cardinality *)
277 List.sort (fun (n,_) (m,_) -> m - n) ((0,[])::res)
280 match inspect_term n t with
281 Some a, set -> Some a, add_cardinality set
282 | None, set when (SetSet.is_empty set) -> None, []
283 | _, _ -> assert false
286 let rec add children =
288 (fun acc t -> StringSet.union (signature_concl t) acc)
289 (StringSet.empty) children
291 (* this function creates the set of all different constants appearing in
292 the conclusion of the term *)
293 and signature_concl =
298 | Cic.Implicit _ -> StringSet.empty
299 | Cic.Var (u,exp_named_subst) -> StringSet.empty
300 | Cic.Const (u,exp_named_subst) ->
301 StringSet.singleton (UriManager.string_of_uri u)
302 | Cic.MutInd (u, t, exp_named_subst) ->
303 let uri = UriManager.string_of_uriref (u, [t]) in
304 StringSet.singleton uri
305 | Cic.MutConstruct (u, t, c, exp_named_subst) ->
306 let uri = UriManager.string_of_uriref (u, [t;c]) in
307 StringSet.singleton uri
308 | Cic.Cast (t, _) -> signature_concl t
309 | Cic.Prod (_, s, t) ->
310 StringSet.union (signature_concl s) (signature_concl t)
311 | Cic.Lambda (_, s, t) ->
312 StringSet.union (signature_concl s) (signature_concl t)
313 | Cic.LetIn (_, s, t) ->
314 StringSet.union (signature_concl s) (signature_concl t)
315 | Cic.Appl l -> add l
321 let rec signature_of = function
322 | Cic.Cast (t, _) -> signature_of t
323 | Cic.Prod (_, _, t) -> signature_of t
324 | Cic.LetIn (_, _, t) -> signature_of t
325 | Cic.Appl ((Cic.Const (u,exp_named_subst))::l) ->
326 let suri = UriManager.string_of_uri u in
327 Some (suri, []), add l
328 | Cic.Appl ((Cic.MutInd (u, t, exp_named_subst))::l) ->
329 let suri = UriManager.string_of_uriref (u, [t]) in
330 if u = HelmLibraryObjects.Logic.eq_URI then
331 (* equality is handled in a special way: in particular,
332 the type, if defined, is always added to the prefix,
333 and n is not decremented - it should have been n-2 *)
335 Cic.Const (u1,exp_named_subst1)::l1 ->
336 let suri1 = UriManager.string_of_uri u1 in
337 let inconcl = StringSet.remove suri1 (add l1) in
338 Some (suri, [suri1]), inconcl
339 | Cic.MutInd (u1, t1, exp_named_subst1)::l1 ->
340 let suri1 = UriManager.string_of_uriref (u1, [t1]) in
341 let inconcl = StringSet.remove suri1 (add l1) in
342 Some (suri, [suri1]), inconcl
343 | Cic.MutConstruct (u1, t1, c1, exp_named_subst1)::l1 ->
344 let suri1 = UriManager.string_of_uriref (u1, [t1;c1]) in
345 let inconcl = StringSet.remove suri1 (add l1) in
346 Some (suri, [suri1]), inconcl
347 | _ :: _ -> Some (suri, []), StringSet.empty
348 | _ -> assert false (* args number must be > 0 *)
350 Some (suri, []), add l
351 | Cic.Appl ((Cic.MutConstruct (u, t, c, exp_named_subst))::l) ->
352 let suri = UriManager.string_of_uriref (u, [t;c]) in
353 Some (suri, []), add l
354 | t -> None, signature_concl t
356 (* takes a list of lists and returns the list of all elements
357 without repetitions *)
359 let rec drop_repetitions = function
362 | u1::u2::l when u1 = u2 -> drop_repetitions (u2::l)
363 | u::l -> u::(drop_repetitions l) in
364 drop_repetitions (List.sort Pervasives.compare (List.concat l))
366 let must_of_prefix ?(where = `Conclusion) m s =
369 | `Conclusion -> [`InConclusion]
370 | `Statement -> [`InConclusion; `InHypothesis; `MainHypothesis None]
372 let s' = List.map (fun u -> `Obj (u, positions)) s in
373 `Obj (m, [`MainConclusion None]) :: s'
375 let escape = Str.global_replace (Str.regexp_string "\'") "\\'"
377 let get_constants (dbd:Mysql.dbd) ~where uri =
378 let uri = escape uri in
381 | `Conclusion -> ["\"MainConclusion\""; "\"InConclusion\""]
383 ["\"MainConclusion\""; "\"InConclusion\""; "\"InHypothesis\"";
384 "\"MainHypothesis\""]
387 sprintf "select h_occurrence from refObj where source=\"%s\" and (%s)"
388 uri (String.concat " or " positions)
390 let result = Mysql.exec dbd query in
391 let set = ref StringSet.empty in
395 | Some uri -> set := StringSet.add uri !set
396 | _ -> assert false);
399 let at_most ~(dbd:Mysql.dbd) ?(where = `Conclusion) only u =
400 let inconcl = get_constants dbd ~where u in
401 StringSet.subset inconcl only
403 (* Special handling of equality. The problem is filtering out theorems just
404 * containing variables (e.g. all the theorems in cic:/Coq/Ring/). Really
405 * ad-hoc, no better solution found at the moment *)
406 let myspeciallist_of_facts =
407 [0,"cic:/Coq/Init/Logic/eq.ind#xpointer(1/1/1)"]
409 [0,"cic:/Coq/Init/Logic/eq.ind#xpointer(1/1/1)";
410 (* 0,"cic:/Coq/Init/Logic/sym_eq.con"; *)
411 0,"cic:/Coq/Init/Logic/trans_eq.con";
412 0,"cic:/Coq/Init/Logic/f_equal.con";
413 0,"cic:/Coq/Init/Logic/f_equal2.con";
414 0,"cic:/Coq/Init/Logic/f_equal3.con"]
417 let compute_exactly ~(dbd:Mysql.dbd) ?(facts=false) ~where main prefixes =
421 if ((m = 0) && (main = HelmLibraryObjects.Logic.eq_XURI)) then
422 (if facts then myspeciallist_of_facts
426 let must = must_of_prefix ~where main s in
428 | `Conclusion -> at_least ~dbd ~concl_card:(Eq (m+1)) must
429 | `Statement -> at_least ~dbd ~full_card:(Eq (m+1)) must
431 List.map (fun uri -> (m, uri)) res)
434 (* critical value reached, fallback to "only" constraints *)
436 let compute_with_only ~(dbd:Mysql.dbd) ?(facts=false) ?(where = `Conclusion)
437 main prefixes constants
439 let max_prefix_length =
442 | (max,_)::_ -> max in
443 let maximal_prefixes =
444 let rec filter res = function
446 | (n,s)::l when n = max_prefix_length -> filter ((n,s)::res) l
448 filter [] prefixes in
454 let must = must_of_prefix ~where main s in
457 | `Conclusion -> at_least ~dbd ~concl_card:(Gt (m+1)) must
458 | `Statement -> at_least ~dbd ~full_card:(Gt (m+1)) must
460 (* we tag the uri with m+1, for sorting purposes *)
461 List.map (fun uri -> (m+1, uri)) res))
464 List.filter (function (_,uri) -> at_most ~dbd ~where constants uri) all in
465 let equal_to = compute_exactly ~dbd ~facts ~where main prefixes in
466 greater_than @ equal_to
468 (* real match query implementation *)
470 let cmatch ~(dbd:Mysql.dbd) ?(facts=false) t =
471 let (main, constants) = signature_of t in
474 | Some (main, types) ->
475 (* the type of eq is not counted in constants_no *)
476 let types_no = List.length types in
477 let constants_no = StringSet.cardinal constants in
478 if (constants_no > critical_value) then
479 let prefixes = prefixes just_factor t in
481 | Some main, all_concl ->
483 List.fold_right StringSet.add types (StringSet.add main constants)
485 compute_with_only ~dbd ~facts main all_concl all_constants
488 (* in this case we compute all prefixes, and we do not need
489 to apply the only constraints *)
491 if constants_no = 0 then
492 (if types_no = 0 then
495 Some main, [0, []; types_no, types])
497 prefixes (constants_no+types_no+1) t
500 Some main, all_concl ->
501 compute_exactly ~dbd ~facts ~where:`Conclusion main all_concl
506 let must = must_of_prefix ~where:`Conclusion main s in
507 let res = at_least ~dbd ~concl_card:(Eq (m+1)) must in
508 List.map (fun uri -> (m, uri)) res)
512 let power_upto upto consts =
513 let l = StringSet.elements consts in
514 List.sort (fun (n,_) (m,_) -> m - n)
517 List.filter (function (n,l) -> n <= upto)
518 res@(List.map (function (n,l) -> (n+1,a::l)) res))
522 let l = StringSet.elements consts in
523 List.sort (fun (n,_) (m,_) -> m - n)
525 (fun res a -> res@(List.map (function (n,l) -> (n+1,a::l)) res))
528 type where = [ `Conclusion | `Statement ]
530 let sigmatch ~(dbd:Mysql.dbd)
531 ?(facts=false) ?(where = `Conclusion) (main, constants) =
534 | Some (main, types) ->
535 let constants_no = StringSet.cardinal constants in
536 if (constants_no > critical_value) then
538 let subsets = power_upto just_factor constants in
539 let types_no = List.length types in
540 List.map (function (n,l) -> (n+types_no,types@l)) subsets
543 List.fold_right StringSet.add types (StringSet.add main constants)
545 compute_with_only ~dbd ~where main subsets all_constants
548 let subsets = power constants in
549 let types_no = List.length types in
551 (0,[]) :: List.map (function (n,l) -> (n+types_no,types@l)) subsets
554 compute_exactly ~dbd ~facts ~where main subsets
556 (* match query wrappers *)
560 let cmatch ~dbd ?(facts=false) term =
563 (fun x y -> Pervasives.compare (fst y) (fst x))
564 (cmatch' ~dbd ~facts term))
566 let constants_of = signature_concl