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.
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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.
17 * You should have received a copy of the GNU General Public License
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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.MutCaseFixAndCofixRefineNotImplemented ->
58 (* TODO remove this case as soon as refine is fully implemented *)
60 debug_print (Printf.sprintf "TYPE CHECKER %s" (CicPp.ppterm term));
61 let term' = CicTypeChecker.type_of_aux' metasenv context term in
65 | CicRefine.Uncertain _ ->
66 debug_print ("%%% UNCERTAIN!!! " ^ CicPp.ppterm term) ;
69 debug_print ("%%% PRUNED!!! " ^ CicPp.ppterm term) ;
72 let resolve (env: environment) (item: domain_item) ?(num = "") ?(args = []) () =
73 snd (Environment.find item env) env num args
75 (* TODO move it to Cic *)
76 let find_in_environment name context =
77 let rec aux acc = function
78 | [] -> raise Not_found
79 | Cic.Name hd :: tl when hd = name -> acc
80 | _ :: tl -> aux (acc + 1) tl
84 let interpretate ~context ~env ast =
85 let rec aux loc context = function
86 | CicTextualParser2Ast.LocatedTerm (loc, term) -> aux loc context term
87 | CicTextualParser2Ast.Appl terms -> Cic.Appl (List.map (aux loc context) terms)
88 | CicTextualParser2Ast.Appl_symbol (symb, i, args) ->
89 let cic_args = List.map (aux loc context) args in
90 resolve env (Symbol (symb, i)) ~args:cic_args ()
91 | CicTextualParser2Ast.Binder (binder_kind, var, typ, body) ->
92 let cic_type = aux_option loc context typ in
93 let cic_body = aux loc (var :: context) body in
94 (match binder_kind with
95 | `Lambda -> Cic.Lambda (var, cic_type, cic_body)
96 | `Pi | `Forall -> Cic.Prod (var, cic_type, cic_body)
98 resolve env (Symbol ("exists", 0))
99 ~args:[ cic_type; Cic.Lambda (var, cic_type, cic_body) ] ())
100 | CicTextualParser2Ast.Case (term, indty_ident, outtype, branches) ->
101 let cic_term = aux loc context term in
102 let cic_outtype = aux_option loc context outtype in
103 let do_branch (pat, term) =
104 let rec do_branch' context = function
105 | [] -> aux loc context term
107 let cic_body = do_branch' (Cic.Name hd :: context) tl in
108 Cic.Lambda (Cic.Name hd, Cic.Implicit, cic_body)
111 | _ :: tl -> (* ignoring constructor *) do_branch' context tl
114 let (indtype_uri, indtype_no) =
115 match resolve env (Id indty_ident) () with
116 | Cic.MutInd (uri, tyno, _) -> uri, tyno
117 | Cic.Implicit -> raise Try_again
118 | _ -> raise DisambiguateChoices.Invalid_choice
120 Cic.MutCase (indtype_uri, indtype_no, cic_outtype, cic_term,
121 (List.map do_branch branches))
122 | CicTextualParser2Ast.LetIn (var, def, body) ->
123 let cic_def = aux loc context def in
124 let name = Cic.Name var in
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 (var, _, _, _) -> Cic.Name var :: acc)
132 let cic_body = aux loc context' body in
135 (fun (var, body, typ, decr_idx) ->
136 let cic_body = aux loc context' body in
137 let cic_type = aux_option loc context typ in
138 (var, decr_idx, cic_type, cic_body))
141 let counter = ref 0 in
142 let build_term funs =
143 (* this is the body of the fold_right function below. Rationale: Fix
144 * and CoFix cases differs only in an additional index in the
145 * indcutiveFun list, see Cic.term *)
148 (fun (var, _, _, _) cic ->
150 Cic.LetIn (Cic.Name var, Cic.Fix (!counter, funs), cic))
153 List.map (fun (name, _, typ, body) -> (name, typ, body)) funs
155 (fun (var, _, _, _) cic ->
156 Cic.LetIn (Cic.Name var, Cic.CoFix (!counter, funs), cic))
158 List.fold_right (build_term inductiveFuns) inductiveFuns cic_body
159 | CicTextualParser2Ast.Ident (name, subst) ->
160 (* TODO hanlde explicit substitutions *)
162 let index = find_in_environment name context in
164 CicTextualParser2.fail loc "Explicit substitutions not allowed here";
166 with Not_found -> resolve env (Id name) ())
167 | CicTextualParser2Ast.Num (num, i) -> resolve env (Num i) ~num ()
168 | CicTextualParser2Ast.Meta (index, subst) ->
171 (function None -> None | Some term -> Some (aux loc context term))
174 Cic.Meta (index, cic_subst)
175 | CicTextualParser2Ast.Sort `Prop -> Cic.Sort Cic.Prop
176 | CicTextualParser2Ast.Sort `Set -> Cic.Sort Cic.Set
177 | CicTextualParser2Ast.Sort `Type -> Cic.Sort Cic.Type
178 | CicTextualParser2Ast.Sort `CProp -> Cic.Sort Cic.CProp
179 and aux_option loc context = function
180 | None -> Cic.Implicit
181 | Some term -> aux loc context term
184 | CicTextualParser2Ast.LocatedTerm (loc, term) -> aux loc context term
187 let domain_of_term ~context ast =
188 let rec aux loc context = function
189 | CicTextualParser2Ast.LocatedTerm (_, term) -> aux loc context term
190 | CicTextualParser2Ast.Appl terms ->
191 List.fold_left (fun dom term -> Domain.union dom (aux loc context term))
193 | CicTextualParser2Ast.Appl_symbol (symb, i, args) ->
194 List.fold_left (fun dom term -> Domain.union dom (aux loc context term))
195 (Domain.singleton (Symbol (symb, i))) args
196 | CicTextualParser2Ast.Binder (_, var, typ, body) ->
197 let type_dom = aux_option loc context typ in
198 let body_dom = aux loc (var :: context) body in
199 Domain.union type_dom body_dom
200 | CicTextualParser2Ast.Case (term, indty_ident, outtype, branches) ->
201 let term_dom = aux loc context term in
202 let outtype_dom = aux_option loc context outtype in
203 let do_branch (pat, term) =
207 (List.fold_left (fun acc var -> (Cic.Name var) :: acc)
213 List.fold_left (fun dom branch -> Domain.union dom (do_branch branch))
214 Domain.empty branches
216 Domain.add (Id indty_ident)
217 (Domain.union outtype_dom (Domain.union term_dom branches_dom))
218 | CicTextualParser2Ast.LetIn (var, body, where) ->
219 let body_dom = aux loc context body in
220 let where_dom = aux loc (Cic.Name var :: context) where in
221 Domain.union body_dom where_dom
222 | CicTextualParser2Ast.LetRec (kind, defs, where) ->
224 List.fold_left (fun acc (var, _, _, _) -> Cic.Name var :: acc)
227 let where_dom = aux loc context' where in
230 (fun dom (_, body, typ, _) ->
231 Domain.union (aux loc context' body) (aux_option loc context typ))
234 Domain.union where_dom defs_dom
235 | CicTextualParser2Ast.Ident (name, subst) ->
236 (* TODO hanlde explicit substitutions *)
238 let index = find_in_environment name context in
240 CicTextualParser2.fail loc "Explicit substitutions not allowed here";
242 with Not_found -> Domain.singleton (Id name))
243 | CicTextualParser2Ast.Num (num, i) -> Domain.singleton (Num i)
244 | CicTextualParser2Ast.Meta (index, local_context) ->
246 (fun dom term -> Domain.union dom (aux_option loc context term))
247 Domain.empty local_context
248 | CicTextualParser2Ast.Sort _ -> Domain.empty
249 and aux_option loc context = function
250 | None -> Domain.empty
251 | Some t -> aux loc context t
254 | CicTextualParser2Ast.LocatedTerm (loc, term) -> aux loc context term
257 module Make (C: Callbacks) =
259 let choices_of_id mqi_handle id =
260 let query = MQueryGenerator.locate id in
261 let result = MQueryInterpreter.execute mqi_handle query in
265 MQueryMisc.wrong_xpointer_format_from_wrong_xpointer_format' uri
267 C.output_html (`Msg (`T "Locate query:"));
268 MQueryUtil.text_of_query
269 (fun s -> C.output_html ~append_NL:false (`Msg (`T s)))
271 C.output_html (`Msg (`T "Result:"));
272 MQueryUtil.text_of_result
273 (fun s -> C.output_html (`Msg (`T s))) "" result;
277 [UriManager.string_of_uri (C.input_or_locate_uri
278 ~title:("URI matching \"" ^ id ^ "\" unknown."))]
281 C.interactive_user_uri_choice ~selection_mode:`MULTIPLE
282 ~ok:"Try every selection." ~enable_button_for_non_vars:true
283 ~title:"Ambiguous input." ~id
284 ~msg: ("Ambiguous input \"" ^ id ^
285 "\". Please, choose one or more interpretations:")
293 HelmLibraryObjects.term_of_uri (UriManager.uri_of_string uri)
294 with _ -> assert false
299 let disambiguate_term mqi_handle context metasenv term ~aliases:current_env
301 let current_dom = (* TODO temporary, remove ASAP *)
302 Environment.fold (fun item _ dom -> Domain.add item dom)
303 current_env Domain.empty
305 debug_print "NEW DISAMBIGUATE INPUT";
306 let disambiguate_context = (* cic context -> disambiguate context *)
308 (function None -> Cic.Anonymous | Some (name, _) -> name)
311 let term_dom = domain_of_term ~context:disambiguate_context term in
312 debug_print (sprintf "DISAMBIGUATION DOMAIN: %s"
313 (string_of_domain term_dom));
314 let todo_dom = Domain.diff term_dom current_dom in
315 (* (2) lookup function for any item (Id/Symbol/Num) *)
317 let id_choices = Hashtbl.create 1023 in
323 Hashtbl.find id_choices id
325 let choices = choices_of_id mqi_handle id in
326 Hashtbl.add id_choices id choices;
328 | Symbol (symb, _) -> DisambiguateChoices.lookup_symbol_choices symb
329 | Num instance -> DisambiguateChoices.lookup_num_choices ()
331 if choices = [] then raise (No_choices item);
334 (* (3) test an interpretation filling with meta uninterpreted identifiers
336 let test_env current_env todo_dom =
340 Environment.add item ("Implicit", fun _ _ _ -> Cic.Implicit) env)
345 interpretate ~context:disambiguate_context ~env:filled_env term
347 refine metasenv context cic_term
349 | Try_again -> Uncertain
350 | DisambiguateChoices.Invalid_choice -> Ko
352 (* (4) build all possible interpretations *)
353 let rec aux current_env todo_dom =
354 if Domain.is_empty todo_dom then
355 match test_env current_env Domain.empty with
356 | Ok (term, metasenv) -> [ current_env, term, metasenv ]
357 | Ko | Uncertain -> []
359 let item = Domain.choose todo_dom in
360 let remaining_dom = Domain.remove item todo_dom in
361 debug_print (sprintf "CHOOSED ITEM: %s" (string_of_domain_item item));
362 let choices = lookup_choices item in
363 let rec filter = function
365 | codomain_item :: tl ->
366 let new_env = Environment.add item codomain_item current_env in
367 (match test_env new_env remaining_dom with
368 | Ok (term, metasenv) ->
369 (if Domain.is_empty remaining_dom then
370 [ new_env, term, metasenv ]
372 aux new_env remaining_dom)
375 (if Domain.is_empty remaining_dom then
378 aux new_env remaining_dom)
384 let (choosed_env, choosed_term, choosed_metasenv) =
385 match aux current_env todo_dom with
386 | [] -> raise NoWellTypedInterpretation
388 debug_print "UNA SOLA SCELTA";
391 debug_print (sprintf "PIU' SCELTE (%d)" (List.length l));
398 fst (Environment.find domain_item env)
400 (descr_of_domain_item domain_item, description))
401 (Domain.elements term_dom))
404 let choosed = C.interactive_interpretation_choice choices in
407 (choosed_env, choosed_metasenv, choosed_term)