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_______________________________________________________________ *)
14 exception RefineFailure of (Stdpp.location * string) Lazy.t;;
15 exception Uncertain of (Stdpp.location * string) Lazy.t;;
16 exception AssertFailure of string Lazy.t;;
19 module Ref = NReference
22 let inside c = indent := !indent ^ String.make 1 c;;
23 let outside () = indent := String.sub !indent 0 (String.length !indent -1);;
27 prerr_endline (Printf.sprintf "%-20s" !indent ^ " " ^ Lazy.force s)
32 let wrap_exc msg = function
33 | NCicUnification.Uncertain _ -> Uncertain msg
34 | NCicUnification.UnificationFailure _ -> RefineFailure msg
35 | NCicTypeChecker.TypeCheckerFailure _ -> RefineFailure msg
39 let exp_implicit ~localise metasenv context expty t =
40 let foo x = match expty with Some t -> `WithType t | None -> x in
42 | `Closed -> NCicMetaSubst.mk_meta metasenv [] (foo `Term)
43 | `Type -> NCicMetaSubst.mk_meta metasenv context (foo `Type)
44 | `Term -> NCicMetaSubst.mk_meta metasenv context (foo `Term)
45 | `Tagged s -> NCicMetaSubst.mk_meta ~name:s metasenv context (foo `Term)
47 raise (RefineFailure (lazy (localise t, "A vector of implicit terms " ^
48 "can only be used in argument position")))
52 let check_allowed_sort_elimination rdb localise r orig =
55 | C.Appl l -> C.Appl (l @ [arg])
56 | t -> C.Appl [t;arg] in
57 (* ctx, ind_type @ lefts, sort_of_ind_ty@lefts, outsort *)
58 let rec aux metasenv subst context ind arity1 arity2 =
59 (*D*)inside 'S'; try let rc =
60 let arity1 = NCicReduction.whd ~subst context arity1 in
61 pp (lazy(NCicPp.ppterm ~subst ~metasenv ~context arity1 ^ " elimsto " ^
62 NCicPp.ppterm ~subst ~metasenv ~context arity2 ^ "\nMENV:\n"^
63 NCicPp.ppmetasenv ~subst metasenv));
65 | C.Prod (name,so1,de1) (* , t ==?== C.Prod _ *) ->
66 let metasenv, _, meta, _ =
67 NCicMetaSubst.mk_meta metasenv ((name,C.Decl so1)::context) `Type
70 try NCicUnification.unify rdb metasenv subst context
71 arity2 (C.Prod (name, so1, meta))
72 with exc -> raise (wrap_exc (lazy (localise orig, Printf.sprintf
73 "expected %s, found %s" (* XXX localizzare meglio *)
74 (NCicPp.ppterm ~subst ~metasenv ~context (C.Prod (name, so1, meta)))
75 (NCicPp.ppterm ~subst ~metasenv ~context arity2))) exc)
77 aux metasenv subst ((name, C.Decl so1)::context)
78 (mkapp (NCicSubstitution.lift 1 ind) (C.Rel 1)) de1 meta
79 | C.Sort _ (* , t ==?== C.Prod _ *) ->
80 let metasenv, _, meta, _ = NCicMetaSubst.mk_meta metasenv [] `Type in
82 try NCicUnification.unify rdb metasenv subst context
83 arity2 (C.Prod ("_", ind, meta))
84 with exc -> raise (wrap_exc (lazy (localise orig, Printf.sprintf
85 "expected %s, found %s" (* XXX localizzare meglio *)
86 (NCicPp.ppterm ~subst ~metasenv ~context (C.Prod ("_", ind, meta)))
87 (NCicPp.ppterm ~subst ~metasenv ~context arity2))) exc)
89 (try NCicTypeChecker.check_allowed_sort_elimination
90 ~metasenv ~subst r context ind arity1 arity2;
92 with exc -> raise (wrap_exc (lazy (localise orig,
93 "Sort elimination not allowed ")) exc))
95 (*D*)in outside(); rc with exc -> outside (); raise exc
101 ?(localise=fun _ -> Stdpp.dummy_loc)
102 metasenv subst context term expty
104 let force_ty skip_lambda skip_appl metasenv subst context orig t infty expty =
105 (*D*)inside 'F'; try let rc =
109 | C.Implicit _ -> assert false
110 | C.Lambda _ when skip_lambda -> metasenv, subst, t, expty
111 | C.Appl _ when skip_appl -> metasenv, subst, t, expty
113 pp (lazy ("forcing infty=expty: "^
114 (NCicPp.ppterm ~metasenv ~subst ~context infty) ^ " === " ^
115 (NCicPp.ppterm ~metasenv ~subst:[] ~context expty)));
117 let metasenv, subst =
118 (*D*)inside 'U'; try let rc =
119 NCicUnification.unify rdb metasenv subst context infty expty
120 (*D*)in outside(); rc with exc -> outside (); raise exc
122 metasenv, subst, t, expty
124 | NCicUnification.Uncertain _
125 | NCicUnification.UnificationFailure _ as exc ->
126 try_coercions rdb ~localise
127 metasenv subst context t orig infty expty true exc)
128 | None -> metasenv, subst, t, infty
129 (*D*)in outside(); rc with exc -> outside (); raise exc
131 let rec typeof_aux metasenv subst context expty =
133 (*D*)inside 'R'; try let rc =
134 pp (lazy (NCicPp.ppterm ~metasenv ~subst ~context t ^ " ::exp:: " ^
135 match expty with None -> "None" | Some e ->
136 NCicPp.ppterm ~metasenv ~subst ~context e));
137 let metasenv, subst, t, infty =
142 match List.nth context (n - 1) with
143 | (_,C.Decl ty) -> NCicSubstitution.lift n ty
144 | (_,C.Def (_,ty)) -> NCicSubstitution.lift n ty
146 raise (RefineFailure (lazy (localise t,"unbound variable"))))
148 metasenv, subst, t, infty
150 (try metasenv, subst, t, C.Sort (NCicEnvironment.typeof_sort s)
152 | NCicEnvironment.UntypableSort msg ->
153 raise (RefineFailure (lazy (localise t, Lazy.force msg)))
154 | NCicEnvironment.AssertFailure msg -> raise (AssertFailure msg))
155 | C.Implicit infos ->
156 let metasenv,_,t,ty =
157 exp_implicit ~localise metasenv context expty t infos
159 metasenv, subst, t, ty
160 | C.Meta (n,l) as t ->
163 let _,_,_,ty = NCicUtils.lookup_subst n subst in ty
164 with NCicUtils.Subst_not_found _ -> try
165 let _,_,ty = NCicUtils.lookup_meta n metasenv in
166 match ty with C.Implicit _ ->
167 prerr_endline (string_of_int n);
168 prerr_endline (NCicPp.ppmetasenv ~subst metasenv);
169 prerr_endline (NCicPp.ppsubst ~metasenv subst);
170 assert false | _ -> ty
171 with NCicUtils.Meta_not_found _ ->
172 raise (AssertFailure (lazy (Printf.sprintf
173 "%s not found" (NCicPp.ppterm ~subst ~metasenv ~context t))))
175 metasenv, subst, t, NCicSubstitution.subst_meta l ty
177 metasenv, subst, t, NCicTypeChecker.typeof ~subst ~metasenv context t
178 | C.Prod (name,(s as orig_s),(t as orig_t)) ->
179 let metasenv, subst, s, s1 = typeof_aux metasenv subst context None s in
180 let metasenv, subst, s, s1 =
182 metasenv subst context s orig_s localise s1 in
183 let context1 = (name,(C.Decl s))::context in
184 let metasenv, subst, t, s2 = typeof_aux metasenv subst context1 None t in
185 let metasenv, subst, t, s2 =
187 metasenv subst context1 t orig_t localise s2 in
188 let metasenv, subst, s, t, ty =
189 sort_of_prod localise metasenv subst
190 context orig_s orig_t (name,s) t (s1,s2)
192 metasenv, subst, NCic.Prod(name,s,t), ty
193 | C.Lambda (n,(s as orig_s),t) as orig ->
194 let exp_s, exp_ty_t, force_after =
196 | None -> None, None, false
198 match NCicReduction.whd ~subst context expty with
199 | C.Prod (_,s,t) -> Some s, Some t, false
200 | _ -> None, None, true
202 let metasenv, subst, s, ty_s =
203 typeof_aux metasenv subst context None s in
204 let metasenv, subst, s, _ =
206 metasenv subst context s orig_s localise ty_s in
207 let (metasenv,subst), exp_ty_t =
211 pp(lazy("Force source to: "^NCicPp.ppterm ~metasenv ~subst
213 NCicUnification.unify rdb metasenv subst context s exp_s,exp_ty_t
214 with exc -> raise (wrap_exc (lazy (localise orig_s, Printf.sprintf
215 "Source type %s was expected to be %s" (NCicPp.ppterm ~metasenv
216 ~subst ~context s) (NCicPp.ppterm ~metasenv ~subst ~context
218 | None -> (metasenv, subst), None
220 let context_for_t = (n,C.Decl s) :: context in
221 let metasenv, subst, t, ty_t =
222 typeof_aux metasenv subst context_for_t exp_ty_t t
225 force_ty false true metasenv subst context orig
226 (C.Lambda(n,s,t)) (C.Prod (n,s,ty_t)) expty
228 metasenv, subst, C.Lambda(n,s,t), C.Prod (n,s,ty_t)
229 | C.LetIn (n,(ty as orig_ty),t,bo) ->
230 let metasenv, subst, ty, ty_ty =
231 typeof_aux metasenv subst context None ty in
232 let metasenv, subst, ty, _ =
234 metasenv subst context ty orig_ty localise ty_ty in
235 let metasenv, subst, t, _ =
236 typeof_aux metasenv subst context (Some ty) t in
237 let context1 = (n, C.Def (t,ty)) :: context in
238 let metasenv, subst, expty1 =
240 | None -> metasenv, subst, None
243 NCicUnification.delift_type_wrt_terms
244 rdb metasenv subst context x [t]
248 let metasenv, subst, bo, bo_ty =
249 typeof_aux metasenv subst context1 expty1 bo
251 let bo_ty = NCicSubstitution.subst ~avoid_beta_redexes:true t bo_ty in
252 metasenv, subst, C.LetIn (n, ty, t, bo), bo_ty
253 | C.Appl ((he as orig_he)::(_::_ as args)) ->
254 let upto = match orig_he with C.Meta _ -> List.length args | _ -> 0 in
256 if upto > 0 then NCicReduction.head_beta_reduce ~upto t else t
259 let metasenv, subst, he, ty_he =
260 typeof_aux metasenv subst context None he in
261 let metasenv, subst, t, ty =
262 eat_prods rdb ~localise force_ty metasenv subst context expty t
263 orig_he he ty_he args in
264 metasenv, subst, hbr t, ty
266 if args = [C.Implicit `Vector] && expty <> None then
267 (* we try here to expand the vector a 0 implicits, but we use
268 * the expected type *)
270 let metasenv, subst, he, ty_he =
271 typeof_aux metasenv subst context expty he in
272 metasenv, subst, hbr he, ty_he
273 with Uncertain _ | RefineFailure _ -> refine_appl ()
275 | C.Appl _ -> raise (AssertFailure (lazy "Appl of length < 2"))
276 | C.Match (Ref.Ref (_,Ref.Ind (_,tyno,_)) as r,
277 outtype,(term as orig_term),pl) as orig ->
278 let _, leftno, itl, _, _ = NCicEnvironment.get_checked_indtys r in
279 let _, _, arity, cl = List.nth itl tyno in
280 let constructorsno = List.length cl in
281 let _, metasenv, args =
282 NCicMetaSubst.saturate metasenv subst context arity 0 in
283 let ind = if args = [] then C.Const r else C.Appl (C.Const r::args) in
284 let metasenv, subst, term, _ =
285 typeof_aux metasenv subst context (Some ind) term in
286 let parameters, arguments = HExtlib.split_nth leftno args in
289 | C.Implicit _ as ot ->
290 let rec aux = function
291 | [] -> NCic.Lambda ("_",NCic.Implicit `Type,ot)
292 | _::tl -> NCic.Lambda ("_",NCic.Implicit `Type,aux tl)
297 let metasenv, subst, outtype, outsort =
298 typeof_aux metasenv subst context None outtype in
300 (* next lines are to do a subst-expansion of the outtype, so
301 that when it becomes a beta-abstraction, the beta-redex is
302 fired during substitution *)
303 (*CSC: this is instantiate! should we move it from tactics to the
304 refiner? I think so! *)
305 let metasenv,metanoouttype,newouttype,metaoutsort =
306 NCicMetaSubst.mk_meta metasenv context `Term in
308 NCicUnification.unify rdb metasenv subst context outsort metaoutsort in
310 List.filter (function (j,_) -> j <> metanoouttype) metasenv in
312 (metanoouttype,(Some "outtype",context,outtype,metaoutsort))::subst in
313 let outtype = newouttype in
315 (* let's control if the sort elimination is allowed: [(I q1 ... qr)|B] *)
317 if parameters = [] then C.Const r
318 else C.Appl ((C.Const r)::parameters) in
319 let metasenv, subst, ind, ind_ty =
320 typeof_aux metasenv subst context None ind in
321 let metasenv, subst =
322 check_allowed_sort_elimination rdb localise r orig_term metasenv subst
323 context ind ind_ty outsort
325 (* let's check if the type of branches are right *)
326 if List.length pl <> constructorsno then
327 raise (RefineFailure (lazy (localise orig,
328 "Wrong number of cases in a match")));
330 let metasenv, subst =
332 | None -> metasenv, subst
334 NCicUnification.unify rdb metasenv subst context resty expty
337 let _, metasenv, subst, pl =
339 (fun p (j, metasenv, subst, branches) ->
341 let cons = Ref.mk_constructor j r in
342 if parameters = [] then C.Const cons
343 else C.Appl (C.Const cons::parameters)
345 let metasenv, subst, cons, ty_cons =
346 typeof_aux metasenv subst context None cons in
348 NCicTypeChecker.type_of_branch
349 ~subst context leftno outtype cons ty_cons in
350 pp (lazy ("TYPEOFBRANCH: " ^
351 NCicPp.ppterm ~metasenv ~subst ~context p ^ " ::inf:: " ^
352 NCicPp.ppterm ~metasenv ~subst ~context ty_branch ));
353 let metasenv, subst, p, _ =
354 typeof_aux metasenv subst context (Some ty_branch) p in
355 j-1, metasenv, subst, p :: branches)
356 pl (List.length pl, metasenv, subst, [])
358 let resty = C.Appl (outtype::arguments@[term]) in
359 let resty = NCicReduction.head_beta_reduce ~subst resty in
360 metasenv, subst, C.Match (r, outtype, term, pl),resty
361 | C.Match _ -> assert false
363 pp (lazy (NCicPp.ppterm ~metasenv ~subst ~context t ^ " ::inf:: "^
364 NCicPp.ppterm ~metasenv ~subst ~context infty ));
365 force_ty true true metasenv subst context orig t infty expty
366 (*D*)in outside(); rc with exc -> outside (); raise exc
368 typeof_aux metasenv subst context expty term
370 and try_coercions rdb
372 metasenv subst context t orig_t infty expty perform_unification exc
374 (* we try with a coercion *)
375 let rec first exc = function
377 raise (wrap_exc (lazy (localise orig_t, Printf.sprintf
378 "The term %s has type %s but is here used with type %s"
379 (NCicPp.ppterm ~metasenv ~subst ~context t)
380 (NCicPp.ppterm ~metasenv ~subst ~context infty)
381 (NCicPp.ppterm ~metasenv ~subst ~context expty))) exc)
382 | (_,metasenv, newterm, newtype, meta)::tl ->
384 pp (lazy("K=" ^ NCicPp.ppterm ~metasenv ~subst ~context newterm));
385 pp (lazy ( "UNIFICATION in CTX:\n"^
386 NCicPp.ppcontext ~metasenv ~subst context
388 NCicPp.ppmetasenv metasenv ~subst
390 NCicPp.ppterm ~metasenv ~subst ~context t ^ " === " ^
391 NCicPp.ppterm ~metasenv ~subst ~context meta ^ "\n"));
392 let metasenv, subst =
393 NCicUnification.unify rdb metasenv subst context t meta
395 pp (lazy ( "UNIFICATION in CTX:\n"^
396 NCicPp.ppcontext ~metasenv ~subst context
398 NCicPp.ppmetasenv metasenv ~subst
400 NCicPp.ppterm ~metasenv ~subst ~context newtype ^ " === " ^
401 NCicPp.ppterm ~metasenv ~subst ~context expty ^ "\n"));
402 let metasenv, subst =
403 if perform_unification then
404 NCicUnification.unify rdb metasenv subst context newtype expty
407 metasenv, subst, newterm, newtype
409 | NCicUnification.UnificationFailure _ -> first exc tl
410 | NCicUnification.Uncertain _ as exc -> first exc tl
412 pp(lazy("try_coercion " ^
413 NCicPp.ppterm ~metasenv ~subst ~context infty ^ " |---> " ^
414 NCicPp.ppterm ~metasenv ~subst ~context expty));
416 (NCicCoercion.look_for_coercion
417 rdb metasenv subst context infty expty)
419 and force_to_sort rdb metasenv subst context t orig_t localise ty =
420 match NCicReduction.whd ~subst context ty with
421 | C.Meta (_,(0,(C.Irl 0 | C.Ctx []))) as ty ->
422 metasenv, subst, t, ty
423 | C.Meta (_i,(_,(C.Irl 0 | C.Ctx []))) -> assert false (*CSC: ???
424 metasenv, subst, t, C.Meta(i,(0,C.Irl 0)) *)
425 | C.Meta (i,(_,lc)) ->
426 let len = match lc with C.Irl len->len | C.Ctx l->List.length l in
427 let metasenv, subst, newmeta =
429 NCicMetaSubst.restrict metasenv subst i (HExtlib.list_seq 1 (len+1))
430 else metasenv, subst, i
432 metasenv, subst, t, C.Meta (newmeta,(0,C.Irl 0))
433 | C.Sort _ as ty -> metasenv, subst, t, ty
435 try_coercions rdb ~localise metasenv subst context
436 t orig_t ty (NCic.Sort (NCic.Type NCicEnvironment.type0)) false
437 (Uncertain (lazy (localise orig_t,
438 "The type of " ^ NCicPp.ppterm ~metasenv ~subst ~context t
439 ^ " is not a sort: " ^ NCicPp.ppterm ~metasenv ~subst ~context ty)))
442 localise metasenv subst context orig_s orig_t (name,s) t (t1, t2)
444 (* force to sort is done in the Prod case in typeof *)
446 | C.Sort _, C.Sort C.Prop -> metasenv, subst, s, t, t2
447 | C.Sort (C.Type u1), C.Sort (C.Type u2) ->
448 metasenv, subst, s, t, C.Sort (C.Type (NCicEnvironment.max u1 u2))
449 | C.Sort C.Prop,C.Sort (C.Type _) -> metasenv, subst, s, t, t2
451 | C.Meta _, C.Meta (_,(_,_))
452 | C.Sort _, C.Meta (_,(_,_)) -> metasenv, subst, s, t, t2
453 | x, (C.Sort _ | C.Meta _) | _, x ->
454 let y, context, orig =
455 if x == t1 then s, context, orig_s
456 else t, ((name,C.Decl s)::context), orig_t
458 raise (RefineFailure (lazy (localise orig,Printf.sprintf
459 "%s is expected to be a type, but its type is %s that is not a sort"
460 (NCicPp.ppterm ~subst ~metasenv ~context y)
461 (NCicPp.ppterm ~subst ~metasenv ~context x))))
463 and guess_name subst ctx ty =
464 let aux initial = "#" ^ String.make 1 initial in
466 | C.Const (NReference.Ref (u,_))
467 | C.Appl (C.Const (NReference.Ref (u,_)) :: _) ->
468 aux (String.sub (NUri.name_of_uri u) 0 1).[0]
469 | C.Prod _ -> aux 'f'
472 let _,_,t,_ = NCicUtils.lookup_subst n subst in
473 guess_name subst ctx (NCicSubstitution.subst_meta lc t)
474 with NCicUtils.Subst_not_found _ -> aux 'M')
477 and eat_prods rdb ~localise force_ty metasenv subst context expty orig_t orig_he he ty_he args =
478 (*D*)inside 'E'; try let rc =
479 let rec aux metasenv subst args_so_far he ty_he = function
481 let res = NCicUntrusted.mk_appl he (List.rev args_so_far) in
482 pp(lazy("FORCE FINAL APPL: " ^
483 NCicPp.ppterm ~metasenv ~subst ~context res ^
484 " of type " ^ NCicPp.ppterm ~metasenv ~subst ~context ty_he
485 ^ " to type " ^ match expty with None -> "None" | Some x ->
486 NCicPp.ppterm ~metasenv ~subst ~context x));
487 (* whatever the term is, we force the type. in case of ((Lambda..) ?...)
488 * the application may also be a lambda! *)
489 force_ty false false metasenv subst context orig_t res ty_he expty
490 | NCic.Implicit `Vector::tl ->
491 let has_some_more_pis x =
492 match NCicReduction.whd ~subst context x with
493 | NCic.Meta _ | NCic.Appl (NCic.Meta _::_) -> false
497 aux metasenv subst args_so_far he ty_he tl
500 | RefineFailure _ as exc when has_some_more_pis ty_he ->
502 aux metasenv subst args_so_far he ty_he
503 (NCic.Implicit `Term :: NCic.Implicit `Vector :: tl)
505 Uncertain msg | RefineFailure msg -> raise (wrap_exc msg exc)))
507 match NCicReduction.whd ~subst context ty_he with
509 let metasenv, subst, arg, _ =
510 typeof rdb ~localise metasenv subst context arg (Some s) in
511 let t = NCicSubstitution.subst ~avoid_beta_redexes:true arg t in
512 aux metasenv subst (arg :: args_so_far) he t tl
514 | C.Appl (C.Meta _ :: _) as t ->
515 let metasenv, subst, arg, ty_arg =
516 typeof rdb ~localise metasenv subst context arg None in
517 let name = guess_name subst context ty_arg in
518 let metasenv, _, meta, _ =
519 NCicMetaSubst.mk_meta metasenv
520 ((name,C.Decl ty_arg) :: context) `Type
522 let flex_prod = C.Prod (name, ty_arg, meta) in
523 (* next line grants that ty_args is a type *)
524 let metasenv,subst, flex_prod, _ =
525 typeof rdb ~localise metasenv subst context flex_prod None in
527 pp (lazy ( "UNIFICATION in CTX:\n"^
528 NCicPp.ppcontext ~metasenv ~subst context
530 NCicPp.ppterm ~metasenv ~subst ~context t ^ " === " ^
531 NCicPp.ppterm ~metasenv ~subst ~context flex_prod ^ "\n"));
533 let metasenv, subst =
534 try NCicUnification.unify rdb metasenv subst context t flex_prod
535 with exc -> raise (wrap_exc (lazy (localise orig_he, Printf.sprintf
536 ("The term %s has an inferred type %s, but is applied to the" ^^
537 " argument %s of type %s")
538 (NCicPp.ppterm ~metasenv ~subst ~context he)
539 (NCicPp.ppterm ~metasenv ~subst ~context t)
540 (NCicPp.ppterm ~metasenv ~subst ~context arg)
541 (NCicPp.ppterm ~metasenv ~subst ~context ty_arg)))
543 | NCicUnification.UnificationFailure m ->
544 NCicUnification.Uncertain m
546 (* XXX coerce to funclass *)
548 let meta = NCicSubstitution.subst ~avoid_beta_redexes:true arg meta in
549 aux metasenv subst (arg :: args_so_far) he meta tl
550 | C.Match (_,_,C.Meta _,_)
551 | C.Match (_,_,C.Appl (C.Meta _ :: _),_)
552 | C.Appl (C.Const (NReference.Ref (_, NReference.Fix _)) :: _) ->
553 raise (Uncertain (lazy (localise orig_he, Printf.sprintf
554 ("The term %s is here applied to %d arguments but expects " ^^
555 "only %d arguments") (NCicPp.ppterm ~metasenv ~subst ~context he)
556 (List.length args) (List.length args_so_far))))
558 let metasenv, subst, newhead, newheadty =
559 try_coercions rdb ~localise metasenv subst context
560 (NCicUntrusted.mk_appl he (List.rev args_so_far)) orig_he ty
561 (NCic.Prod ("_",NCic.Implicit `Term,NCic.Implicit `Term))
563 (RefineFailure (lazy (localise orig_he, Printf.sprintf
564 ("The term %s is here applied to %d arguments but expects " ^^
565 "only %d arguments") (NCicPp.ppterm ~metasenv ~subst ~context he)
566 (List.length args) (List.length args_so_far))))
568 aux metasenv subst [] newhead newheadty (arg :: tl)
570 (* We need to reverse the order of the new created metas since they
571 are pushed on top of the metasenv in the wrong order *)
572 let highest_meta = NCicMetaSubst.maxmeta () in
573 let metasenv, subst, newhead, newheadty =
574 aux metasenv subst [] he ty_he args in
575 let metasenv_old,metasenv_new =
576 List.partition (fun (i,_) -> i <= highest_meta) metasenv
578 (List.rev metasenv_new) @ metasenv_old, subst, newhead, newheadty
579 (*D*)in outside(); rc with exc -> outside (); raise exc
582 let rec first f l1 l2 =
584 | x1::tl1, x2::tl2 ->
585 (try f x1 x2 with Not_found -> first f tl1 tl2)
586 | _ -> raise Not_found
589 let rec find add dt t =
594 | C.Meta (_,(_,C.Ctx dl)), C.Meta (_,(_,C.Ctx l))
595 | C.Appl dl,C.Appl l -> dl,l
596 | C.Lambda (_,ds,dt), C.Lambda (_,s,t)
597 | C.Prod (_,ds,dt), C.Prod (_,s,t) -> [ds;dt],[s;t]
598 | C.LetIn (_,ds,db,dt), C.LetIn (_,s,b,t) -> [ds;db;dt],[s;b;t]
599 | C.Match (_,dot,dt,dl), C.Match (_,ot,t,l) -> (dot::dt::dl),(ot::t::l)
600 | _ -> raise Not_found
602 first (find add) dl l
605 let relocalise old_localise dt t add =
607 (try find add dt t with Not_found -> assert false)
610 let undebruijnate inductive ref t rev_fl =
611 NCicSubstitution.psubst (fun x -> x)
612 (List.rev (HExtlib.list_mapi
613 (fun (_,_,rno,_,_,_) i ->
615 (if inductive then NReference.mk_fix i rno ref
616 else NReference.mk_cofix i ref))
623 rdb ?(localise=fun _ -> Stdpp.dummy_loc) (uri,height,metasenv,subst,obj)
625 let check_type metasenv subst context (ty as orig_ty) = (* XXX fattorizza *)
626 let metasenv, subst, ty, sort =
627 typeof rdb ~localise metasenv subst context ty None
629 let metasenv, subst, ty, sort =
630 force_to_sort rdb metasenv subst context ty orig_ty localise sort
632 metasenv, subst, ty, sort
635 | C.Constant (relevance, name, bo, ty , attr) ->
636 let metasenv, subst, ty, _ = check_type metasenv subst [] ty in
637 let metasenv, subst, bo, ty, height =
640 let metasenv, subst, bo, ty =
641 typeof rdb ~localise metasenv subst [] bo (Some ty) in
642 let height = (* XXX recalculate *) height in
643 metasenv, subst, Some bo, ty, height
644 | None -> metasenv, subst, None, ty, 0
646 uri, height, metasenv, subst,
647 C.Constant (relevance, name, bo, ty, attr)
648 | C.Fixpoint (inductive, fl, attr) ->
649 let len = List.length fl in
650 let types, metasenv, subst, rev_fl =
652 (fun (types, metasenv, subst, fl) (relevance,name,k,ty,bo) ->
653 let metasenv, subst, ty, _ = check_type metasenv subst [] ty in
654 let dbo = NCicTypeChecker.debruijn uri len [] ~subst bo in
655 let localise = relocalise localise dbo bo in
656 (name,C.Decl ty)::types,
657 metasenv, subst, (relevance,name,k,ty,dbo,localise)::fl
658 ) ([], metasenv, subst, []) fl (* XXX kl rimosso nel nucleo *)
660 let metasenv, subst, fl =
662 (fun (metasenv,subst,fl) (relevance,name,k,ty,dbo,localise) ->
663 let metasenv, subst, dbo, ty =
664 typeof rdb ~localise metasenv subst types dbo (Some ty)
666 metasenv, subst, (relevance,name,k,ty,dbo)::fl)
667 (metasenv, subst, []) rev_fl
669 let height = (* XXX recalculate *) height in
672 (fun (relevance,name,k,ty,dbo) ->
674 undebruijnate inductive
675 (NReference.reference_of_spec uri
676 (if inductive then NReference.Fix (0,k,0)
677 else NReference.CoFix 0)) dbo rev_fl
679 relevance,name,k,ty,bo)
682 uri, height, metasenv, subst,
683 C.Fixpoint (inductive, fl, attr)
684 | C.Inductive (ind, leftno, itl, attr) ->
685 let len = List.length itl in
686 let metasenv,subst,rev_itl,tys =
688 (fun (metasenv,subst,res,ctx) (relevance,n,ty,cl) ->
689 let metasenv, subst, ty, _ = check_type metasenv subst [] ty in
690 metasenv,subst,(relevance,n,ty,cl)::res,(n,NCic.Decl ty)::ctx
691 ) (metasenv,subst,[],[]) itl in
692 let metasenv,subst,itl,_ =
694 (fun (metasenv,subst,res,i) (it_relev,n,ty,cl) ->
695 let context,ty_sort = NCicReduction.split_prods ~subst [] ~-1 ty in
696 let sx_context_ty_rev,_= HExtlib.split_nth leftno (List.rev context) in
697 let metasenv,subst,cl =
699 (fun (k_relev,n,te) (metasenv,subst,res) ->
701 try snd (HExtlib.split_nth leftno k_relev)
702 with Failure _ -> k_relev in
703 let te = NCicTypeChecker.debruijn uri len [] ~subst te in
704 let metasenv, subst, te, _ = check_type metasenv subst tys te in
705 let context,te = NCicReduction.split_prods ~subst tys leftno te in
706 let _,chopped_context_rev =
707 HExtlib.split_nth (List.length tys) (List.rev context) in
708 let sx_context_te_rev,_ =
709 HExtlib.split_nth leftno chopped_context_rev in
710 let metasenv,subst,_ =
713 (fun (metasenv,subst,context) item1 item2 ->
714 let (metasenv,subst),convertible =
716 match item1,item2 with
717 (n1,C.Decl ty1),(n2,C.Decl ty2) ->
719 NCicUnification.unify rdb ~test_eq_only:true metasenv
720 subst context ty1 ty2,true
722 (metasenv,subst),false
723 | (n1,C.Def (bo1,ty1)),(n2,C.Def (bo2,ty2)) ->
726 NCicUnification.unify rdb ~test_eq_only:true metasenv
727 subst context ty1 ty2
729 NCicUnification.unify rdb ~test_eq_only:true metasenv
730 subst context bo1 bo2,true
732 (metasenv,subst),false
733 | _,_ -> (metasenv,subst),false
735 | NCicUnification.Uncertain _
736 | NCicUnification.UnificationFailure _ ->
737 (metasenv,subst),false
742 | _,C.Def (b,_) -> b in
743 if not convertible then
744 raise (RefineFailure (lazy (localise term2,
745 ("Mismatch between the left parameters of the constructor " ^
746 "and those of its inductive type"))))
748 metasenv,subst,item1::context
749 ) (metasenv,subst,tys) sx_context_ty_rev sx_context_te_rev
750 with Invalid_argument "List.fold_left2" -> assert false in
751 let con_sort= NCicTypeChecker.typeof ~subst ~metasenv context te in
753 NCicReduction.whd ~subst context con_sort,
754 NCicReduction.whd ~subst [] ty_sort
756 (C.Sort (C.Type u1) as s1), (C.Sort (C.Type u2) as s2) ->
757 if not (NCicEnvironment.universe_leq u1 u2) then
760 (lazy(localise te, "The type " ^
761 NCicPp.ppterm ~metasenv ~subst ~context s1 ^
762 " of the constructor is not included in the inductive"^
764 NCicPp.ppterm ~metasenv ~subst ~context s2)))
765 | C.Sort _, C.Sort C.Prop
766 | C.Sort _, C.Sort C.Type _ -> ()
771 "Wrong constructor or inductive arity shape"))));
772 (* let's check also the positivity conditions *)
775 (NCicTypeChecker.are_all_occurrences_positive
776 ~subst context uri leftno (i+leftno) leftno (len+leftno) te)
781 "Non positive occurence in " ^
782 NCicPp.ppterm ~metasenv ~subst ~context te)))
784 let relsno = List.length itl + leftno in
786 NCicSubstitution.psubst
791 NCic.Const (NReference.reference_of_spec uri
792 (NReference.Ind (ind,relsno - i,leftno))))
793 (HExtlib.list_seq 1 (relsno+1))
797 (fun (name,decl) te ->
799 NCic.Decl ty -> NCic.Prod (name,ty,te)
800 | NCic.Def (bo,ty) -> NCic.LetIn (name,ty,bo,te)
801 ) sx_context_te_rev te
803 metasenv,subst,(k_relev,n,te)::res
804 ) cl (metasenv,subst,[])
806 metasenv,subst,(it_relev,n,ty,cl)::res,i+1
807 ) (metasenv,subst,[],1) rev_itl
809 uri, height, metasenv, subst, C.Inductive (ind, leftno, itl, attr)
812 (* vim:set foldmethod=marker: *)