2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department, University of Bologna, Italy.
6 ||T|| HELM is free software; you can redistribute it and/or
7 ||A|| modify it under the terms of the GNU General Public License
8 \ / version 2 or (at your option) any later version.
9 \ / This software is distributed as is, NO WARRANTY.
10 V_______________________________________________________________ *)
12 (* $Id: nCic.ml 9058 2008-10-13 17:42:30Z tassi $ *)
16 open DisambiguateTypes
19 module Ast = CicNotationPt
20 module NRef = NReference
22 let debug_print _ = ();;
23 (* let debug_print s = prerr_endline (Lazy.force s);; *)
25 let cic_name_of_name = function
26 | Ast.Ident (n, None) -> n
30 let refine_term metasenv subst context uri ~use_coercions:_ term _ ~localization_tbl =
32 debug_print (lazy (sprintf "TEST_INTERPRETATION: %s"
33 (NCicPp.ppterm ~metasenv ~subst ~context term)));
36 try NCicUntrusted.NCicHash.find localization_tbl t
38 prerr_endline (NCicPp.ppterm ~metasenv ~subst ~context t);
41 let metasenv, subst, term, _ =
42 NCicRefiner.typeof metasenv subst context term None ~localise
44 Disambiguate.Ok (term, metasenv, subst, ())
46 | NCicRefiner.Uncertain loc_msg ->
47 debug_print (lazy ("UNCERTAIN: [" ^ snd (Lazy.force loc_msg) ^ "] " ^
48 NCicPp.ppterm ~metasenv ~subst ~context term)) ;
49 Disambiguate.Uncertain loc_msg
50 | NCicRefiner.RefineFailure loc_msg ->
51 debug_print (lazy (sprintf "PRUNED:\nterm%s\nmessage:%s"
52 (NCicPp.ppterm ~metasenv ~subst ~context term) (snd(Lazy.force loc_msg))));
53 Disambiguate.Ko loc_msg
56 (* TODO move it to Cic *)
57 let find_in_context name context =
58 let rec aux acc = function
59 | [] -> raise Not_found
60 | hd :: _ when hd = name -> acc
61 | _ :: tl -> aux (acc + 1) tl
66 ?(create_dummy_ids=false) ~mk_choice ~context ~env ~uri ~is_path ast
69 (* create_dummy_ids shouldbe used only for interpretating patterns *)
72 let rec aux ~localize loc context = function
76 | CicNotationPt.AttributedTerm (`Loc loc, term) ->
77 let res = aux ~localize loc context term in
78 if localize then NCicUntrusted.NCicHash.add localization_tbl res loc;
80 | CicNotationPt.AttributedTerm (_, term) -> aux ~localize loc context term
81 | CicNotationPt.Appl (CicNotationPt.Symbol (symb, i) :: args) ->
82 let cic_args = List.map (aux ~localize loc context) args in
83 Disambiguate.resolve ~mk_choice ~env (Symbol (symb, i)) (`Args cic_args)
84 | CicNotationPt.Appl terms ->
85 NCic.Appl (List.map (aux ~localize loc context) terms)
86 | CicNotationPt.Binder (binder_kind, (var, typ), body) ->
87 let cic_type = aux_option ~localize loc context `Type typ in
88 let cic_name = cic_name_of_name var in
89 let cic_body = aux ~localize loc (cic_name :: context) body in
90 (match binder_kind with
91 | `Lambda -> NCic.Lambda (cic_name, cic_type, cic_body)
93 | `Forall -> NCic.Prod (cic_name, cic_type, cic_body)
95 Disambiguate.resolve ~env ~mk_choice (Symbol ("exists", 0))
96 (`Args [ cic_type; NCic.Lambda (cic_name, cic_type, cic_body) ]))
97 | CicNotationPt.Case (term, indty_ident, outtype, branches) ->
98 let cic_term = aux ~localize loc context term in
99 let cic_outtype = aux_option ~localize loc context `Term outtype in
100 let do_branch ((_, _, args), term) =
101 let rec do_branch' context = function
102 | [] -> aux ~localize loc context term
103 | (name, typ) :: tl ->
104 let cic_name = cic_name_of_name name in
105 let cic_body = do_branch' (cic_name :: context) tl in
108 | None -> NCic.Implicit `Type
109 | Some typ -> aux ~localize loc context typ
111 NCic.Lambda (cic_name, typ, cic_body)
113 do_branch' context args
115 if create_dummy_ids then
119 Ast.Wildcard,term -> ("wildcard",None,[]), term
121 raise (DisambiguateTypes.Invalid_choice
122 (lazy (loc, "Syntax error: the left hand side of a "^
123 "branch pattern must be \"_\"")))
127 NCic.MutCase (ref, cic_outtype, cic_term,
128 (List.map do_branch branches))
129 *) ignore branches; assert false (* patterns not implemented yet *)
132 match indty_ident with
133 | Some (indty_ident, _) ->
134 (match Disambiguate.resolve ~env ~mk_choice
135 (Id indty_ident) (`Args []) with
136 | NCic.Const (NReference.Ref (_,NReference.Ind _) as r) -> r
138 raise (Disambiguate.Try_again
139 (lazy "The type of the term to be matched is still unknown"))
141 raise (DisambiguateTypes.Invalid_choice
142 (lazy (loc,"The type of the term to be matched "^
143 "is not (co)inductive: " ^ NCicPp.ppterm
144 ~metasenv:[] ~subst:[] ~context:[] t))))
146 let rec fst_constructor =
148 (Ast.Pattern (head, _, _), _) :: _ -> head
149 | (Ast.Wildcard, _) :: tl -> fst_constructor tl
150 | [] -> raise (Invalid_choice (lazy (loc,"The type "^
151 "of the term to be matched cannot be determined "^
152 "because it is an inductive type without constructors "^
153 "or because all patterns use wildcards")))
156 DisambiguateTypes.Environment.iter
159 (DisambiguateTypes.string_of_domain_item k ^ " => " ^
160 description_of_alias v)) env;
162 (match Disambiguate.resolve ~env ~mk_choice
163 (Id (fst_constructor branches)) (`Args []) with
164 | NCic.Const (NReference.Ref (_,NReference.Con _) as r) ->
165 let b,_,_,_,_ = NCicEnvironment.get_checked_indtys r in
166 NReference.mk_indty b r
168 raise (Disambiguate.Try_again
169 (lazy "The type of the term to be matched is still unknown"))
171 raise (DisambiguateTypes.Invalid_choice
173 "The type of the term to be matched is not (co)inductive: "
174 ^ NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] t))))
176 let _,leftsno,itl,_,indtyp_no =
177 NCicEnvironment.get_checked_indtys indtype_ref in
180 List.nth itl indtyp_no
181 with _ -> assert false in
182 let rec count_prod t =
183 match NCicReduction.whd [] t with
184 NCic.Prod (_, _, t) -> 1 + (count_prod t)
187 let rec sort branches cl =
190 let rec analyze unused unrecognized useless =
193 if unrecognized != [] then
194 raise (DisambiguateTypes.Invalid_choice
196 (loc,"Unrecognized constructors: " ^
197 String.concat " " unrecognized)))
198 else if useless > 0 then
199 raise (DisambiguateTypes.Invalid_choice
201 (loc,"The last " ^ string_of_int useless ^
202 "case" ^ if useless > 1 then "s are" else " is" ^
206 | (Ast.Wildcard,_)::tl when not unused ->
207 analyze true unrecognized useless tl
208 | (Ast.Pattern (head,_,_),_)::tl when not unused ->
209 analyze unused (head::unrecognized) useless tl
210 | _::tl -> analyze unused unrecognized (useless + 1) tl
212 analyze false [] 0 branches
213 | (_,name,ty)::cltl ->
214 let rec find_and_remove =
218 (DisambiguateTypes.Invalid_choice
219 (lazy (loc, "Missing case: " ^ name)))
220 | ((Ast.Wildcard, _) as branch :: _) as branches ->
222 | (Ast.Pattern (name',_,_),_) as branch :: tl
226 let found,rest = find_and_remove tl in
229 let branch,tl = find_and_remove branches in
231 Ast.Pattern (name,y,args),term ->
232 if List.length args = count_prod ty - leftsno then
233 ((name,y,args),term)::sort tl cltl
236 (DisambiguateTypes.Invalid_choice
237 (lazy (loc,"Wrong number of arguments for " ^ name)))
238 | Ast.Wildcard,term ->
244 (`Lambda, (CicNotationPt.Ident ("_", None), None),
247 (("wildcard",None,[]),
248 mk_lambdas (count_prod ty - leftsno)) :: sort tl cltl
250 let branches = sort branches cl in
251 NCic.Match (indtype_ref, cic_outtype, cic_term,
252 (List.map do_branch branches))
253 | CicNotationPt.Cast (t1, t2) ->
254 let cic_t1 = aux ~localize loc context t1 in
255 let cic_t2 = aux ~localize loc context t2 in
256 NCic.LetIn ("_",cic_t2,cic_t1, NCic.Rel 1)
257 | CicNotationPt.LetIn ((name, typ), def, body) ->
258 let cic_def = aux ~localize loc context def in
259 let cic_name = cic_name_of_name name in
262 | None -> NCic.Implicit `Type
263 | Some t -> aux ~localize loc context t
265 let cic_body = aux ~localize loc (cic_name :: context) body in
266 NCic.LetIn (cic_name, cic_typ, cic_def, cic_body)
267 | CicNotationPt.LetRec (_kind, _defs, _body) ->
271 (fun acc (_, (name, _), _, _) ->
272 cic_name_of_name name :: acc)
276 let unlocalized_body = aux ~localize:false loc context' body in
277 match unlocalized_body with
278 NCic.Rel n when n <= List.length defs -> `AvoidLetInNoAppl n
279 | NCic.Appl (NCic.Rel n::l) when n <= List.length defs ->
284 let t',subst,metasenv =
285 CicMetaSubst.delift_rels [] [] (List.length defs) t
288 assert (metasenv=[]);
291 (* We can avoid the LetIn. But maybe we need to recompute l'
292 so that it is localized *)
295 CicNotationPt.AttributedTerm (_,CicNotationPt.Appl(_::l)) ->
296 (* since we avoid the letin, the context has no
298 let l' = List.map (aux ~localize loc context) l in
304 CicMetaSubst.DeliftingARelWouldCaptureAFreeVariable ->
306 `AddLetIn (aux ~localize loc context' body)
308 `AddLetIn unlocalized_body)
311 `AddLetIn (aux ~localize loc context' body)
313 `AddLetIn unlocalized_body
317 (fun (params, (name, typ), body, decr_idx) ->
318 let add_binders kind t =
320 (fun var t -> CicNotationPt.Binder (kind, var, t)) params t
323 aux ~localize loc context' (add_binders `Lambda body) in
325 aux_option ~localize loc context (Some `Type)
326 (HExtlib.map_option (add_binders `Pi) typ) in
328 match cic_name_of_name name with
330 CicNotationPt.fail loc
331 "Recursive functions cannot be anonymous"
332 | NCic.Name name -> name
334 (name, decr_idx, cic_type, cic_body))
339 `Inductive -> NCic.Fix (n,inductiveFuns)
341 let coinductiveFuns =
343 (fun (name, _, typ, body) -> name, typ, body)
346 NCic.CoFix (n,coinductiveFuns)
348 let counter = ref ~-1 in
349 let build_term _ (var,_,ty,_) t =
351 NCic.LetIn (NCic.Name var, fix_or_cofix !counter, ty, t)
354 `AvoidLetInNoAppl n ->
355 let n' = List.length inductiveFuns - n in
357 | `AvoidLetIn (n,l) ->
358 let n' = List.length inductiveFuns - n in
359 NCic.Appl (fix_or_cofix n'::l)
360 | `AddLetIn cic_body ->
361 List.fold_right (build_term inductiveFuns) inductiveFuns
364 | CicNotationPt.Ident _
365 | CicNotationPt.Uri _ when is_path -> raise Disambiguate.PathNotWellFormed
366 | CicNotationPt.Ident (name, subst) ->
367 assert (subst = None);
369 NCic.Rel (find_in_context name context)
371 Disambiguate.resolve ~env ~mk_choice (Id name) (`Args []))
372 | CicNotationPt.Uri (name, subst) ->
373 assert (subst = None);
375 NCic.Const (NRef.reference_of_string name)
376 with NRef.IllFormedReference _ ->
377 CicNotationPt.fail loc "Ill formed reference")
378 | CicNotationPt.Implicit -> NCic.Implicit `Term
379 | CicNotationPt.UserInput -> assert false (*NCic.Implicit (Some `Hole)
380 patterns not implemented *)
381 | CicNotationPt.Num (num, i) ->
382 Disambiguate.resolve ~env ~mk_choice (Num i) (`Num_arg num)
383 | CicNotationPt.Meta (index, subst) ->
386 (function None -> assert false| Some t -> aux ~localize loc context t)
389 NCic.Meta (index, (0, NCic.Ctx cic_subst))
390 | CicNotationPt.Sort `Prop -> NCic.Sort NCic.Prop
391 | CicNotationPt.Sort `Set -> NCic.Sort (NCic.Type
392 [false,NUri.uri_of_string "cic:/matita/pts/Type.univ"])
393 | CicNotationPt.Sort (`Type _u) -> NCic.Sort (NCic.Type
394 [false,NUri.uri_of_string "cic:/matita/pts/Type.univ"])
395 | CicNotationPt.Sort (`CProp _u) -> NCic.Sort (NCic.Type
396 [false,NUri.uri_of_string "cic:/matita/pts/CProp.univ"])
397 | CicNotationPt.Symbol (symbol, instance) ->
398 Disambiguate.resolve ~env ~mk_choice
399 (Symbol (symbol, instance)) (`Args [])
400 | _ -> assert false (* god bless Bologna *)
403 prerr_endline (NCicPp.ppterm ~metasenv:[] ~context:[] ~subst:[]
406 and aux_option ~localize loc context annotation = function
407 | None -> NCic.Implicit annotation
408 | Some (CicNotationPt.AttributedTerm (`Loc loc, term)) ->
409 let res = aux_option ~localize loc context annotation (Some term) in
410 if localize then NCicUntrusted.NCicHash.add localization_tbl res loc;
412 | Some (CicNotationPt.AttributedTerm (_, term)) ->
413 aux_option ~localize loc context annotation (Some term)
414 | Some CicNotationPt.Implicit -> NCic.Implicit annotation
415 | Some term -> aux ~localize loc context term
417 aux ~localize:true HExtlib.dummy_floc context ast
419 let interpretate_term ?(create_dummy_ids=false) ~context ~env ~uri ~is_path ast
422 let context = List.map fst context in
423 interpretate_term ~create_dummy_ids ~context ~env ~uri ~is_path ast
427 let domain_of_term ~context =
428 Disambiguate.domain_of_ast_term ~context
431 let disambiguate_term ~context ~metasenv ~subst ?goal
432 ~mk_implicit ~description_of_alias ~mk_choice
433 ~aliases ~universe ~lookup_in_library
434 (text,prefix_len,term)
436 let localization_tbl = NCicUntrusted.NCicHash.create 503 in
439 None -> (fun _ y -> y),(fun x -> x)
442 let _,_,ty = NCicUtils.lookup_meta n metasenv in
443 NCic.LetIn ("_",ty,y,NCic.Rel 1)),
445 | Disambiguate.Ok (t,m,s,ug) ->
447 | NCic.LetIn ("_",_,y,NCic.Rel 1) -> Disambiguate.Ok (y,m,s,ug)
452 MultiPassDisambiguator.disambiguate_thing
453 ~freshen_thing:CicNotationUtil.freshen_term
454 ~context ~metasenv ~initial_ugraph:() ~aliases
455 ~mk_implicit ~description_of_alias
456 ~string_context_of_context:(List.map (fun (x,_) -> Some x))
457 ~universe ~uri:None ~pp_thing:CicNotationPp.pp_term
458 ~passes:(MultiPassDisambiguator.passes ())
459 ~lookup_in_library ~domain_of_thing:domain_of_term
460 ~interpretate_thing:(interpretate_term ~mk_choice (?create_dummy_ids:None))
461 ~refine_thing:refine_term (text,prefix_len,term)
462 ~localization_tbl ~hint ~subst
464 List.map (function (a,b,c,d,_) -> a,b,c,d) res, b
470 [false, NUri.uri_of_string ("cic:/matita/pts/Type.univ")]
472 [false, NUri.uri_of_string ("cic:/matita/pts/Type"^string_of_int n^".univ")]
476 [false, NUri.uri_of_string ("cic:/matita/pts/CProp.univ")]
478 [false, NUri.uri_of_string ("cic:/matita/pts/CProp"^string_of_int n^".univ")]
480 NCicEnvironment.add_constraint true (mk_type 0) (mk_type 1);
481 NCicEnvironment.add_constraint true (mk_cprop 0) (mk_cprop 1);
482 NCicEnvironment.add_constraint true (mk_cprop 0) (mk_type 1);
483 NCicEnvironment.add_constraint true (mk_type 0) (mk_cprop 1);
484 NCicEnvironment.add_constraint false (mk_cprop 0) (mk_type 0);
485 NCicEnvironment.add_constraint false (mk_type 0) (mk_cprop 0);