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.
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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.
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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.
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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 open DisambiguateTypes
31 exception No_choices of domain_item
32 exception NoWellTypedInterpretation
34 (** raised when an environment is not enough informative to decide *)
38 let debug_print = if debug then prerr_endline else ignore
40 let descr_of_domain_item = function
43 | Num i -> string_of_int i
46 | Ok of Cic.term * Cic.metasenv
50 let refine metasenv context term =
51 let metasenv, term = CicMkImplicit.expand_implicits metasenv context term in
52 debug_print (sprintf "TEST_INTERPRETATION: %s" (CicPp.ppterm term));
54 let term', _, metasenv' = CicRefine.type_of_aux' metasenv context term in
57 | CicRefine.Uncertain _ ->
58 debug_print ("%%% UNCERTAIN!!! " ^ CicPp.ppterm term) ;
61 debug_print ("%%% PRUNED!!! " ^ CicPp.ppterm term) ;
64 let resolve (env: environment) (item: domain_item) ?(num = "") ?(args = []) () =
65 snd (Environment.find item env) env num args
67 (* TODO move it to Cic *)
68 let find_in_environment name context =
69 let rec aux acc = function
70 | [] -> raise Not_found
71 | Cic.Name hd :: tl when hd = name -> acc
72 | _ :: tl -> aux (acc + 1) tl
76 let interpretate ~context ~env ast =
77 let rec aux loc context = function
78 | CicTextualParser2Ast.LocatedTerm (loc, term) -> aux loc context term
79 | CicTextualParser2Ast.Appl terms ->
80 Cic.Appl (List.map (aux loc context) terms)
81 | CicTextualParser2Ast.Appl_symbol (symb, i, args) ->
82 let cic_args = List.map (aux loc context) args in
83 resolve env (Symbol (symb, i)) ~args:cic_args ()
84 | CicTextualParser2Ast.Binder (binder_kind, (var, typ), body) ->
85 let cic_type = aux_option loc context typ in
86 let cic_body = aux loc (var :: context) body in
87 (match binder_kind with
88 | `Lambda -> Cic.Lambda (var, cic_type, cic_body)
89 | `Pi | `Forall -> Cic.Prod (var, cic_type, cic_body)
91 resolve env (Symbol ("exists", 0))
92 ~args:[ cic_type; Cic.Lambda (var, cic_type, cic_body) ] ())
93 | CicTextualParser2Ast.Case (term, indty_ident, outtype, branches) ->
94 let cic_term = aux loc context term in
95 let cic_outtype = aux_option loc context outtype in
96 let do_branch ((head, args), term) =
97 let rec do_branch' context = function
98 | [] -> aux loc context term
99 | (name, typ) :: tl ->
100 let cic_body = do_branch' (name :: context) tl in
103 | None -> Cic.Implicit
104 | Some typ -> aux loc context typ
106 Cic.Lambda (name, typ, cic_body)
108 do_branch' context args
110 let (indtype_uri, indtype_no) =
111 match resolve env (Id indty_ident) () with
112 | Cic.MutInd (uri, tyno, _) -> uri, tyno
113 | Cic.Implicit -> raise Try_again
114 | _ -> raise DisambiguateChoices.Invalid_choice
116 Cic.MutCase (indtype_uri, indtype_no, cic_outtype, cic_term,
117 (List.map do_branch branches))
118 | CicTextualParser2Ast.LetIn ((name, typ), def, body) ->
119 let cic_def = aux loc context def in
123 | Some t -> Cic.Cast (cic_def, aux loc context t)
125 let cic_body = aux loc (name :: context) body in
126 Cic.LetIn (name, cic_def, cic_body)
127 | CicTextualParser2Ast.LetRec (kind, defs, body) ->
129 List.fold_left (fun acc ((name, _), _, _) -> name :: acc)
132 let cic_body = aux loc context' body in
135 (fun ((name, typ), body, decr_idx) ->
136 let cic_body = aux loc context' body in
137 let cic_type = aux_option loc context typ in
141 CicTextualParser2.fail loc
142 "Recursive functions cannot be anonymous"
143 | Cic.Name name -> name
145 (name, decr_idx, cic_type, cic_body))
148 let counter = ref ~-1 in
149 let build_term funs =
150 (* this is the body of the fold_right function below. Rationale: Fix
151 * and CoFix cases differs only in an additional index in the
152 * inductiveFun list, see Cic.term *)
155 (fun (var, _, _, _) cic ->
157 Cic.LetIn (Cic.Name var, Cic.Fix (!counter, funs), cic))
160 List.map (fun (name, _, typ, body) -> (name, typ, body)) funs
162 (fun (var, _, _, _) cic ->
164 Cic.LetIn (Cic.Name var, Cic.CoFix (!counter, funs), cic))
166 List.fold_right (build_term inductiveFuns) inductiveFuns cic_body
167 | CicTextualParser2Ast.Ident (name, subst) ->
168 (* TODO hanlde explicit substitutions *)
170 let index = find_in_environment name context in
172 CicTextualParser2.fail loc
173 "Explicit substitutions not allowed here";
175 with Not_found -> resolve env (Id name) ())
176 | CicTextualParser2Ast.Num (num, i) -> resolve env (Num i) ~num ()
177 | CicTextualParser2Ast.Meta (index, subst) ->
180 (function None -> None | Some term -> Some (aux loc context term))
183 Cic.Meta (index, cic_subst)
184 | CicTextualParser2Ast.Sort `Prop -> Cic.Sort Cic.Prop
185 | CicTextualParser2Ast.Sort `Set -> Cic.Sort Cic.Set
186 | CicTextualParser2Ast.Sort `Type -> Cic.Sort Cic.Type
187 | CicTextualParser2Ast.Sort `CProp -> Cic.Sort Cic.CProp
188 and aux_option loc context = function
189 | None -> Cic.Implicit
190 | Some term -> aux loc context term
193 | CicTextualParser2Ast.LocatedTerm (loc, term) -> aux loc context term
196 let domain_of_term ~context ast =
197 let rec aux loc context = function
198 | CicTextualParser2Ast.LocatedTerm (_, term) -> aux loc context term
199 | CicTextualParser2Ast.Appl terms ->
200 List.fold_left (fun dom term -> Domain.union dom (aux loc context term))
202 | CicTextualParser2Ast.Appl_symbol (symb, i, args) ->
203 List.fold_left (fun dom term -> Domain.union dom (aux loc context term))
204 (Domain.singleton (Symbol (symb, i))) args
205 | CicTextualParser2Ast.Binder (_, (var, typ), body) ->
206 let type_dom = aux_option loc context typ in
207 let body_dom = aux loc (var :: context) body in
208 Domain.union type_dom body_dom
209 | CicTextualParser2Ast.Case (term, indty_ident, outtype, branches) ->
210 let term_dom = aux loc context term in
211 let outtype_dom = aux_option loc context outtype in
212 let do_branch ((head, args), term) =
213 let (term_context, args_domain) =
215 (fun (cont, dom) (name, typ) ->
219 | Some typ -> Domain.union dom (aux loc cont typ))))
220 (context, Domain.empty) args
222 Domain.union (aux loc term_context term) args_domain
225 List.fold_left (fun dom branch -> Domain.union dom (do_branch branch))
226 Domain.empty branches
228 Domain.add (Id indty_ident)
229 (Domain.union outtype_dom (Domain.union term_dom branches_dom))
230 | CicTextualParser2Ast.LetIn ((var, typ), body, where) ->
231 let body_dom = aux loc context body in
234 | None -> Domain.empty
235 | Some typ -> aux loc context typ
237 let where_dom = aux loc (var :: context) where in
238 Domain.union (Domain.union body_dom where_dom) type_dom
239 | CicTextualParser2Ast.LetRec (kind, defs, where) ->
241 List.fold_left (fun acc ((var, typ), _, _) -> var :: acc)
244 let where_dom = aux loc context' where in
247 (fun dom ((_, typ), body, _) ->
248 Domain.union (aux loc context' body) (aux_option loc context typ))
251 Domain.union where_dom defs_dom
252 | CicTextualParser2Ast.Ident (name, subst) ->
253 (* TODO hanlde explicit substitutions *)
255 let index = find_in_environment name context in
257 CicTextualParser2.fail loc
258 "Explicit substitutions not allowed here";
260 with Not_found -> Domain.singleton (Id name))
261 | CicTextualParser2Ast.Num (num, i) -> Domain.singleton (Num i)
262 | CicTextualParser2Ast.Meta (index, local_context) ->
264 (fun dom term -> Domain.union dom (aux_option loc context term))
265 Domain.empty local_context
266 | CicTextualParser2Ast.Sort _ -> Domain.empty
267 and aux_option loc context = function
268 | None -> Domain.empty
269 | Some t -> aux loc context t
272 | CicTextualParser2Ast.LocatedTerm (loc, term) -> aux loc context term
275 module Make (C: Callbacks) =
277 let choices_of_id mqi_handle id =
278 let query = MQueryGenerator.locate id in
279 let result = MQueryInterpreter.execute mqi_handle query in
283 MQueryMisc.wrong_xpointer_format_from_wrong_xpointer_format' uri
285 C.output_html (`Msg (`T "Locate query:"));
286 MQueryUtil.text_of_query
287 (fun s -> C.output_html ~append_NL:false (`Msg (`T s)))
289 C.output_html (`Msg (`T "Result:"));
290 MQueryUtil.text_of_result
291 (fun s -> C.output_html (`Msg (`T s))) "" result;
295 [UriManager.string_of_uri (C.input_or_locate_uri
296 ~title:("URI matching \"" ^ id ^ "\" unknown."))]
299 C.interactive_user_uri_choice ~selection_mode:`MULTIPLE
300 ~ok:"Try selected." ~enable_button_for_non_vars:true
301 ~title:"Ambiguous input." ~id
302 ~msg: ("Ambiguous input \"" ^ id ^
303 "\". Please, choose one or more interpretations:")
311 HelmLibraryObjects.term_of_uri (UriManager.uri_of_string uri)
312 with _ -> assert false
317 let disambiguate_term mqi_handle context metasenv term ~aliases:current_env
319 let current_dom = (* TODO temporary, remove ASAP *)
320 Environment.fold (fun item _ dom -> Domain.add item dom)
321 current_env Domain.empty
323 debug_print "NEW DISAMBIGUATE INPUT";
324 let disambiguate_context = (* cic context -> disambiguate context *)
326 (function None -> Cic.Anonymous | Some (name, _) -> name)
329 let term_dom = domain_of_term ~context:disambiguate_context term in
330 debug_print (sprintf "DISAMBIGUATION DOMAIN: %s"
331 (string_of_domain term_dom));
332 let todo_dom = Domain.diff term_dom current_dom in
333 (* (2) lookup function for any item (Id/Symbol/Num) *)
335 let id_choices = Hashtbl.create 1023 in
341 Hashtbl.find id_choices id
343 let choices = choices_of_id mqi_handle id in
344 Hashtbl.add id_choices id choices;
346 | Symbol (symb, _) -> DisambiguateChoices.lookup_symbol_choices symb
347 | Num instance -> DisambiguateChoices.lookup_num_choices ()
349 if choices = [] then raise (No_choices item);
352 (* (3) test an interpretation filling with meta uninterpreted identifiers
354 let test_env current_env todo_dom =
358 Environment.add item ("Implicit", fun _ _ _ -> Cic.Implicit) env)
363 interpretate ~context:disambiguate_context ~env:filled_env term
365 refine metasenv context cic_term
367 | Try_again -> Uncertain
368 | DisambiguateChoices.Invalid_choice -> Ko
370 (* (4) build all possible interpretations *)
371 let rec aux current_env todo_dom =
372 if Domain.is_empty todo_dom then
373 match test_env current_env Domain.empty with
374 | Ok (term, metasenv) -> [ current_env, term, metasenv ]
375 | Ko | Uncertain -> []
377 let item = Domain.choose todo_dom in
378 let remaining_dom = Domain.remove item todo_dom in
379 debug_print (sprintf "CHOOSED ITEM: %s" (string_of_domain_item item));
380 let choices = lookup_choices item in
381 let rec filter = function
383 | codomain_item :: tl ->
384 let new_env = Environment.add item codomain_item current_env in
385 (match test_env new_env remaining_dom with
386 | Ok (term, metasenv) ->
387 (if Domain.is_empty remaining_dom then
388 [ new_env, term, metasenv ]
390 aux new_env remaining_dom)
393 (if Domain.is_empty remaining_dom then
396 aux new_env remaining_dom)
402 let (choosed_env, choosed_term, choosed_metasenv) =
403 match aux current_env todo_dom with
404 | [] -> raise NoWellTypedInterpretation
406 debug_print "UNA SOLA SCELTA";
409 debug_print (sprintf "PIU' SCELTE (%d)" (List.length l));
416 fst (Environment.find domain_item env)
418 (descr_of_domain_item domain_item, description))
419 (Domain.elements term_dom))
422 let choosed = C.interactive_interpretation_choice choices in
425 (choosed_env, choosed_metasenv, choosed_term)