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
21 let debug = ref false;;
26 prerr_endline (Printf.sprintf "%-20s" !indent ^ " " ^ Lazy.force s)
31 let time1 = Unix.gettimeofday () in
32 indent := !indent ^ String.make 1 c;
33 times := time1 :: !times;
34 prerr_endline ("{{{" ^ !indent ^ " ")
40 let time2 = Unix.gettimeofday () in
42 match !times with time1::tl -> times := tl; time1 | [] -> assert false in
43 prerr_endline ("}}} " ^ string_of_float (time2 -. time1));
44 if not ok then prerr_endline "exception raised!";
46 indent := String.sub !indent 0 (String.length !indent -1)
48 Invalid_argument _ -> indent := "??"; ()
53 let wrap_exc msg = function
54 | NCicUnification.Uncertain _ -> Uncertain msg
55 | NCicUnification.UnificationFailure _ -> RefineFailure msg
56 | NCicTypeChecker.TypeCheckerFailure _ -> RefineFailure msg
60 let exp_implicit rdb ~localise metasenv subst context with_type t =
63 let metasenv,subst,expty =
65 None -> metasenv,subst,None
67 let (metasenv,subst),typ =
70 ~unify:(fun m s c t1 t2 ->
71 try Some (NCicUnification.unify rdb m s c t1 t2)
72 with NCicUnification.UnificationFailure _ | NCicUnification.Uncertain _ -> None)
73 metasenv subst context 0 (0,NCic.Irl 0) typ
75 NCicMetaSubst.MetaSubstFailure _
76 | NCicMetaSubst.Uncertain _ ->
77 raise (RefineFailure (lazy (localise t,"Trying to create a closed meta with a non closed type: " ^ NCicPp.ppterm ~metasenv ~subst ~context typ)))
80 metasenv,subst,Some typ
82 NCicMetaSubst.mk_meta metasenv [] ?with_type:expty `IsTerm,subst
83 | `Type -> NCicMetaSubst.mk_meta metasenv context ?with_type `IsType,subst
84 | `Term -> NCicMetaSubst.mk_meta metasenv context ?with_type `IsTerm,subst
87 ~attrs:[`Name s] metasenv context ?with_type `IsTerm,subst
89 raise (RefineFailure (lazy (localise t, "A vector of implicit terms " ^
90 "can only be used in argument position")))
94 let check_allowed_sort_elimination rdb localise r orig =
97 | C.Appl l -> C.Appl (l @ [arg])
98 | t -> C.Appl [t;arg] in
99 (* ctx, ind_type @ lefts, sort_of_ind_ty@lefts, outsort *)
100 let rec aux metasenv subst context ind arity1 arity2 =
101 (*D*)inside 'S'; try let rc =
102 let arity1 = NCicReduction.whd ~subst context arity1 in
103 pp (lazy(NCicPp.ppterm ~subst ~metasenv ~context arity1 ^ " elimsto " ^
104 NCicPp.ppterm ~subst ~metasenv ~context arity2 ^ "\nMENV:\n"^
105 NCicPp.ppmetasenv ~subst metasenv));
107 | C.Prod (name,so1,de1) (* , t ==?== C.Prod _ *) ->
108 let metasenv, _, meta, _ =
109 NCicMetaSubst.mk_meta metasenv ((name,C.Decl so1)::context) `IsType
111 let metasenv, subst =
112 try NCicUnification.unify rdb metasenv subst context
113 arity2 (C.Prod (name, so1, meta))
114 with exc -> raise (wrap_exc (lazy (localise orig, Printf.sprintf
115 "expected %s, found %s" (* XXX localizzare meglio *)
116 (NCicPp.ppterm ~subst ~metasenv ~context (C.Prod (name, so1, meta)))
117 (NCicPp.ppterm ~subst ~metasenv ~context arity2))) exc)
119 aux metasenv subst ((name, C.Decl so1)::context)
120 (mkapp (NCicSubstitution.lift 1 ind) (C.Rel 1)) de1 meta
121 | C.Sort _ (* , t ==?== C.Prod _ *) ->
122 let metasenv, _, meta, _ = NCicMetaSubst.mk_meta metasenv [] `IsSort in
123 let metasenv, subst =
124 try NCicUnification.unify rdb metasenv subst context
125 arity2 (C.Prod ("_", ind, meta))
126 with exc -> raise (wrap_exc (lazy (localise orig, Printf.sprintf
127 "expected %s, found %s" (* XXX localizzare meglio *)
128 (NCicPp.ppterm ~subst ~metasenv ~context (C.Prod ("_", ind, meta)))
129 (NCicPp.ppterm ~subst ~metasenv ~context arity2))) exc)
131 (try NCicTypeChecker.check_allowed_sort_elimination
132 ~metasenv ~subst r context ind arity1 arity2;
134 with exc -> raise (wrap_exc (lazy (localise orig,
135 "Sort elimination not allowed ")) exc))
137 (*D*)in outside true; rc with exc -> outside false; raise exc
143 ?(localise=fun _ -> Stdpp.dummy_loc)
144 metasenv subst context term expty
146 let force_ty skip_lambda skip_appl metasenv subst context orig t infty expty =
147 (*D*)inside 'F'; try let rc =
151 | C.Implicit _ -> assert false
152 | C.Lambda _ when skip_lambda -> metasenv, subst, t, expty
153 | C.Appl _ when skip_appl -> metasenv, subst, t, expty
155 pp (lazy ("forcing infty=expty: "^
156 (NCicPp.ppterm ~metasenv ~subst ~context infty) ^ " === " ^
157 (NCicPp.ppterm ~metasenv ~subst:[] ~context expty)));
159 let metasenv, subst =
160 (*D*)inside 'U'; try let rc =
161 NCicUnification.unify rdb metasenv subst context infty expty
162 (*D*)in outside true; rc with exc -> outside false; raise exc
164 metasenv, subst, t, expty
166 | NCicUnification.Uncertain _
167 | NCicUnification.UnificationFailure _ as exc ->
168 try_coercions rdb ~localise
169 metasenv subst context t orig infty expty true exc)
170 | None -> metasenv, subst, t, infty
171 (*D*)in outside true; rc with exc -> outside false; raise exc
173 let rec typeof_aux metasenv subst context expty =
175 (*D*)inside 'R'; try let rc =
176 pp (lazy (NCicPp.ppterm ~metasenv ~subst ~context t ^ " ::exp:: " ^
177 match expty with None -> "None" | Some e ->
178 NCicPp.ppterm ~metasenv ~subst ~context e));
179 let metasenv, subst, t, infty =
184 match List.nth context (n - 1) with
185 | (_,C.Decl ty) -> NCicSubstitution.lift n ty
186 | (_,C.Def (_,ty)) -> NCicSubstitution.lift n ty
188 raise (RefineFailure (lazy (localise t,"unbound variable"))))
190 metasenv, subst, t, infty
192 (try metasenv, subst, t, C.Sort (NCicEnvironment.typeof_sort s)
194 | NCicEnvironment.UntypableSort msg ->
195 raise (RefineFailure (lazy (localise t, Lazy.force msg)))
196 | NCicEnvironment.AssertFailure msg -> raise (AssertFailure msg))
197 | C.Implicit infos ->
198 let (metasenv,_,t,ty),subst =
199 exp_implicit rdb ~localise metasenv subst context expty t infos
202 typeof_aux metasenv subst context None t
204 metasenv, subst, t, ty
205 | C.Meta (n,l) as t ->
208 let _,_,_,ty = NCicUtils.lookup_subst n subst in metasenv, ty
209 with NCicUtils.Subst_not_found _ ->
210 NCicMetaSubst.extend_meta metasenv n
212 metasenv, subst, t, NCicSubstitution.subst_meta l ty
214 metasenv, subst, t, NCicTypeChecker.typeof ~subst ~metasenv context t
215 | C.Prod (name,(s as orig_s),(t as orig_t)) ->
216 let metasenv, subst, s, s1 = typeof_aux metasenv subst context None s in
217 let metasenv, subst, s, s1 =
219 metasenv subst context s orig_s localise s1 in
220 let context1 = (name,(C.Decl s))::context in
221 let metasenv, subst, t, s2 = typeof_aux metasenv subst context1 None t in
222 let metasenv, subst, t, s2 =
224 metasenv subst context1 t orig_t localise s2 in
225 let metasenv, subst, s, t, ty =
226 sort_of_prod localise metasenv subst
227 context orig_s orig_t (name,s) t (s1,s2)
229 metasenv, subst, NCic.Prod(name,s,t), ty
230 | C.Lambda (n,(s as orig_s),t) as orig ->
231 let exp_s, exp_ty_t, force_after =
233 | None -> None, None, false
235 match NCicReduction.whd ~subst context expty with
236 | C.Prod (_,s,t) -> Some s, Some t, false
237 | _ -> None, None, true
239 let (metasenv,subst), s =
242 (* optimized case: implicit and implicitly typed meta
243 * the optimization prevents proliferation of metas *)
245 | C.Implicit _ -> (metasenv,subst),exp_s
247 let metasenv, subst, s = match s with
249 when (try (match NCicUtils.lookup_meta n metasenv with
250 | _,_,C.Implicit (`Typeof _) -> true
253 | _ -> false) -> metasenv, subst, s
254 | _ -> check_type rdb ~localise metasenv subst context s in
256 pp(lazy("Force source to: "^NCicPp.ppterm ~metasenv ~subst
258 NCicUnification.unify ~test_eq_only:true rdb metasenv subst context s exp_s,s
259 with exc -> raise (wrap_exc (lazy (localise orig_s, Printf.sprintf
260 "Source type %s was expected to be %s" (NCicPp.ppterm ~metasenv
261 ~subst ~context s) (NCicPp.ppterm ~metasenv ~subst ~context
264 let metasenv, subst, s =
265 check_type rdb ~localise metasenv subst context s in
268 let context_for_t = (n,C.Decl s) :: context in
269 let metasenv, subst, t, ty_t =
270 typeof_aux metasenv subst context_for_t exp_ty_t t
273 force_ty false true metasenv subst context orig
274 (C.Lambda(n,s,t)) (C.Prod (n,s,ty_t)) expty
276 metasenv, subst, C.Lambda(n,s,t), C.Prod (n,s,ty_t)
277 | C.LetIn (n,ty,t,bo) ->
278 let metasenv, subst, ty =
279 check_type rdb ~localise metasenv subst context ty in
280 let metasenv, subst, t, _ =
281 typeof_aux metasenv subst context (Some ty) t in
282 let context1 = (n, C.Def (t,ty)) :: context in
283 let metasenv, subst, expty1 =
285 | None -> metasenv, subst, None
288 NCicUnification.delift_type_wrt_terms
289 rdb metasenv subst context1 (NCicSubstitution.lift 1 x)
290 [NCicSubstitution.lift 1 t]
294 let metasenv, subst, bo, bo_ty =
295 typeof_aux metasenv subst context1 expty1 bo
297 let bo_ty = NCicSubstitution.subst ~avoid_beta_redexes:true t bo_ty in
298 metasenv, subst, C.LetIn (n, ty, t, bo), bo_ty
299 | C.Appl ((he as orig_he)::(_::_ as args)) ->
300 let upto = match orig_he with C.Meta _ -> List.length args | _ -> 0 in
302 if upto > 0 then NCicReduction.head_beta_reduce ~upto t else t
304 let refine_appl metasenv subst args =
305 let metasenv, subst, he, ty_he =
306 typeof_aux metasenv subst context None he in
307 let metasenv, subst, t, ty =
308 eat_prods rdb ~localise force_ty metasenv subst context expty t
309 orig_he he ty_he args in
310 metasenv, subst, hbr t, ty
312 if args = [C.Implicit `Vector] && expty <> None then
313 (* we try here to expand the vector a 0 implicits, but we use
314 * the expected type *)
316 let metasenv, subst, he, ty_he =
317 typeof_aux metasenv subst context expty he in
318 metasenv, subst, hbr he, ty_he
319 with Uncertain _ | RefineFailure _ -> refine_appl metasenv subst args
321 (* CSC: whd can be useful on he and expty ... *)
322 (match he, expty with
323 C.Const (Ref.Ref (uri1,Ref.Con _)),
324 Some (C.Appl (C.Const (Ref.Ref (uri2,Ref.Ind _) as ref)::expargs))
325 when NUri.eq uri1 uri2 ->
327 let _,leftno,_,_,_ = NCicEnvironment.get_checked_indtys ref in
328 let leftargs,rightargs = HExtlib.split_nth leftno args in
329 let leftexpargs,_ = HExtlib.split_nth leftno expargs in
330 let metasenv,subst,leftargs_rev =
332 (fun (metasenv,subst,args) arg exparg ->
333 let metasenv,subst,arg,_ =
334 typeof_aux metasenv subst context None arg in
336 NCicUnification.unify rdb metasenv subst context arg exparg
338 metasenv,subst,arg::args
339 ) (metasenv,subst,[]) leftargs leftexpargs
341 (* some checks are re-done here, but it would be complex to
342 * avoid them (e.g. we did not check yet that the constructor
343 * is a construtor for that inductive type) *)
344 refine_appl metasenv subst ((List.rev leftargs_rev)@rightargs)
346 | Sys.Break as exn -> raise exn
347 | _ -> refine_appl metasenv subst args (* to try coercions *))
348 | _ -> refine_appl metasenv subst args)
349 | C.Appl _ -> raise (AssertFailure (lazy "Appl of length < 2"))
350 | C.Match (Ref.Ref (_,Ref.Ind (_,tyno,_)) as r,
351 outtype,(term as orig_term),pl) as orig ->
352 let _, leftno, itl, _, _ = NCicEnvironment.get_checked_indtys r in
353 let _, _, arity, cl = List.nth itl tyno in
354 let constructorsno = List.length cl in
355 let _, metasenv, args =
356 NCicMetaSubst.saturate metasenv subst context arity 0 in
357 let ind = if args = [] then C.Const r else C.Appl (C.Const r::args) in
358 let metasenv, subst, term, _ =
359 typeof_aux metasenv subst context (Some ind) term in
360 let parameters, arguments = HExtlib.split_nth leftno args in
363 | C.Implicit _ as ot ->
364 let rec aux = function
365 | [] -> NCic.Lambda ("_",NCic.Implicit `Type,ot)
366 | _::tl -> NCic.Lambda ("_",NCic.Implicit `Type,aux tl)
371 let metasenv, subst, outtype, outsort =
372 typeof_aux metasenv subst context None outtype in
374 (* next lines are to do a subst-expansion of the outtype, so
375 that when it becomes a beta-abstraction, the beta-redex is
376 fired during substitution *)
377 let _,fresh_metanoouttype,newouttype,_ =
378 NCicMetaSubst.mk_meta metasenv context `IsTerm in
380 (fresh_metanoouttype,([`Name "outtype"],context,outtype,outsort))
382 let outtype = newouttype in
384 (* let's control if the sort elimination is allowed: [(I q1 ... qr)|B] *)
386 if parameters = [] then C.Const r
387 else C.Appl ((C.Const r)::parameters) in
388 let metasenv, subst, ind, ind_ty =
389 typeof_aux metasenv subst context None ind in
390 let metasenv, subst =
391 check_allowed_sort_elimination rdb localise r orig_term metasenv subst
392 context ind ind_ty outsort
394 (* let's check if the type of branches are right *)
395 if List.length pl <> constructorsno then
396 raise (RefineFailure (lazy (localise orig,
397 "Wrong number of cases in a match")));
399 let metasenv, subst =
401 | None -> metasenv, subst
403 NCicUnification.unify rdb metasenv subst context resty expty
406 let _, metasenv, subst, pl =
408 (fun p (j, metasenv, subst, branches) ->
410 let cons = Ref.mk_constructor j r in
411 if parameters = [] then C.Const cons
412 else C.Appl (C.Const cons::parameters)
414 let metasenv, subst, cons, ty_cons =
415 typeof_aux metasenv subst context None cons in
417 NCicTypeChecker.type_of_branch
418 ~subst context leftno outtype cons ty_cons in
419 pp (lazy ("TYPEOFBRANCH: " ^
420 NCicPp.ppterm ~metasenv ~subst ~context p ^ " ::inf:: " ^
421 NCicPp.ppterm ~metasenv ~subst ~context ty_branch ));
422 let metasenv, subst, p, _ =
423 typeof_aux metasenv subst context (Some ty_branch) p in
424 j-1, metasenv, subst, p :: branches)
425 pl (List.length pl, metasenv, subst, [])
427 let resty = C.Appl (outtype::arguments@[term]) in
428 let resty = NCicReduction.head_beta_reduce ~subst resty in
429 metasenv, subst, C.Match (r, outtype, term, pl),resty
430 | C.Match _ -> assert false
432 pp (lazy (NCicPp.ppterm ~metasenv ~subst ~context t ^ " ::inf:: "^
433 NCicPp.ppterm ~metasenv ~subst ~context infty ));
434 force_ty true true metasenv subst context orig t infty expty
435 (*D*)in outside true; rc with exc -> outside false; raise exc
437 typeof_aux metasenv subst context expty term
439 and check_type rdb ~localise metasenv subst context (ty as orig_ty) =
440 let metasenv, subst, ty, sort =
441 typeof rdb ~localise metasenv subst context ty None
443 let metasenv, subst, ty, _ =
444 force_to_sort rdb metasenv subst context ty orig_ty localise sort
448 and try_coercions rdb
450 metasenv subst context t orig_t infty expty perform_unification exc
452 let cs_subst = NCicSubstitution.subst ~avoid_beta_redexes:true in
454 pp (lazy "WWW: trying coercions -- preliminary unification");
455 let metasenv, subst =
456 NCicUnification.unify rdb metasenv subst context infty expty
457 in metasenv, subst, t, expty
460 (* we try with a coercion *)
461 let rec first exc = function
463 pp (lazy "WWW: no more coercions!");
464 raise (wrap_exc (lazy (localise orig_t, Printf.sprintf
465 "The term\n%s\nhas type\n%s\nbut is here used with type\n%s"
466 (NCicPp.ppterm ~metasenv ~subst ~context t)
467 (NCicPp.ppterm ~metasenv ~subst ~context infty)
468 (NCicPp.ppterm ~metasenv ~subst ~context expty))) exc)
469 | (_,metasenv, newterm, newtype, meta)::tl ->
471 pp (lazy("K=" ^ NCicPp.ppterm ~metasenv ~subst ~context newterm));
472 pp (lazy ( "UNIFICATION in CTX:\n"^
473 NCicPp.ppcontext ~metasenv ~subst context
475 NCicPp.ppmetasenv metasenv ~subst
477 NCicPp.ppterm ~metasenv ~subst ~context t ^ " === " ^
478 NCicPp.ppterm ~metasenv ~subst ~context meta ^ "\n"));
479 let metasenv, subst =
480 NCicUnification.unify rdb metasenv subst context t meta
482 pp (lazy ( "UNIFICATION in CTX:\n"^
483 NCicPp.ppcontext ~metasenv ~subst context
485 NCicPp.ppmetasenv metasenv ~subst
487 NCicPp.ppterm ~metasenv ~subst ~context newtype ^ " === " ^
488 NCicPp.ppterm ~metasenv ~subst ~context expty ^ "\n"));
489 let metasenv, subst =
490 if perform_unification then
491 NCicUnification.unify rdb metasenv subst context newtype expty
494 metasenv, subst, newterm, newtype
496 | NCicUnification.UnificationFailure _ -> first exc tl
497 | NCicUnification.Uncertain _ as exc -> first exc tl
501 pp (lazy "WWW: trying coercions -- inner check");
502 match infty, expty, t with
503 | _,_, NCic.Match (Ref.Ref (_,Ref.Ind (_,tyno,leftno)) as r,outty,m,pl) ->
504 (*{{{*) pp (lazy "CASE");
505 (* {{{ helper functions *)
506 let get_cl_and_left_p refit outty =
508 | NReference.Ref (uri, NReference.Ind (_,tyno,leftno)) ->
509 let _, leftno, itl, _, _ = NCicEnvironment.get_checked_indtys r in
510 let _, _, ty, cl = List.nth itl tyno in
511 let constructorsno = List.length cl in
514 match NCicReduction.whd ~subst ~delta:max_int ctx t with
515 | NCic.Prod (name,src,tgt) ->
516 let ctx = (name, (NCic.Decl src)) :: ctx in
522 let rec skip_lambda_delifting t n =
525 | NCic.Lambda (_,_,t),n ->
526 pp (lazy ("WWW: failing term? "^ NCicPp.ppterm ~subst:[] ~metasenv:[] ~context:[] t));
527 skip_lambda_delifting
528 (* substitute dangling indices with a dummy *)
529 (NCicSubstitution.subst (NCic.Sort NCic.Prop) t) (n - 1)
532 let get_l_r_p n = function
533 | NCic.Lambda (_,NCic.Const (Ref.Ref (_,Ref.Ind (_,_,_))),_) -> [],[]
534 | NCic.Lambda (_,NCic.Appl
535 (NCic.Const (Ref.Ref (_,Ref.Ind (_,_,_))) :: args),_) ->
536 HExtlib.split_nth n args
539 let pis = count_pis ty in
540 let rno = pis - leftno in
541 let t = skip_lambda_delifting outty rno in
542 let left_p, _ = get_l_r_p leftno t in
543 let instantiate_with_left cl =
547 (fun t p -> match t with
548 | NCic.Prod (_,_,t) ->
554 let cl = instantiate_with_left (List.map (fun (_,_,x) -> x) cl) in
555 cl, left_p, leftno, rno
558 let rec keep_lambdas_and_put_expty ctx t bo right_p matched n =
561 let rec mkr n = function
562 | [] -> [] | _::tl -> NCic.Rel n :: mkr (n+1) tl
564 pp (lazy ("input replace: " ^ NCicPp.ppterm ~context:ctx ~metasenv:[] ~subst:[] bo));
566 NCicRefineUtil.replace_lifting
567 ~equality:(fun _ -> NCicRefineUtil.alpha_equivalence)
569 ~what:(matched::right_p)
570 ~with_what:(NCic.Rel 1::List.rev (mkr 2 right_p))
573 pp (lazy ("output replace: " ^ NCicPp.ppterm ~context:ctx ~metasenv:[] ~subst:[] bo));
575 | NCic.Lambda (name, src, tgt),_ ->
576 NCic.Lambda (name, src,
577 keep_lambdas_and_put_expty
578 ((name, NCic.Decl src)::ctx) tgt (NCicSubstitution.lift 1 bo)
579 (List.map (NCicSubstitution.lift 1) right_p) (NCicSubstitution.lift 1 matched) (n-1))
582 (*let eq = NCic.Const (NReference.reference_of_string ("cic:/matita/ng/Plogic/equality/eq.ind(1,0,2)")) in
583 let eq_refl = NCic.Const (NReference.reference_of_string ("cic:/matita/ng/Plogic/equality/eq.con(0,1,2)")) in*)
584 let eq = NCic.Const (NReference.reference_of_string ("cic:/matita/ng/Plogic/jmeq/jmeq.ind(1,0,2)")) in
585 let eq_refl = NCic.Const (NReference.reference_of_string ("cic:/matita/ng/Plogic/jmeq/jmeq.con(0,1,2)")) in
587 metasenv subst context cty outty mty m i
589 let rec aux context outty par j mty m = function
590 | NCic.Prod (name, src, tgt) ->
593 ((name, NCic.Decl src) :: context)
594 (NCicSubstitution.lift 1 outty) (NCic.Rel j::par) (j+1)
595 (NCicSubstitution.lift 1 mty) (NCicSubstitution.lift 1 m) tgt
597 NCic.Prod (name, src, t), k
598 | NCic.Const (Ref.Ref (_,Ref.Ind (_,_,leftno)) as r) ->
600 let k = NCic.Const(Ref.mk_constructor i r) in
601 NCicUntrusted.mk_appl k par
603 (* the type has no parameters, so kty = mty
605 try NCicTypechecker.typeof ~subst ~metasenv context k
606 with NCicTypeChecker.TypeCheckerFailure _ -> assert false
609 NCic.Appl [eq; mty; m; mty; k],
610 (NCicSubstitution.lift 1
611 (NCicReduction.head_beta_reduce ~delta:max_int
612 (NCicUntrusted.mk_appl outty [k])))),[mty,m,mty,k]
613 | NCic.Appl (NCic.Const (Ref.Ref (_,Ref.Ind (_,_,leftno)) as r)::pl) ->
614 let left_p,right_p = HExtlib.split_nth leftno pl in
615 let has_rights = right_p <> [] in
617 let k = NCic.Const(Ref.mk_constructor i r) in
618 NCicUntrusted.mk_appl k (left_p@par)
622 NCicTypeChecker.typeof ~subst ~metasenv context k
624 | NCic.Appl (NCic.Const (Ref.Ref (_,Ref.Ind (_,_,_)))::args) ->
625 snd (HExtlib.split_nth leftno args)
627 with NCicTypeChecker.TypeCheckerFailure _-> assert false
631 | NCic.Appl (NCic.Const (Ref.Ref (_,Ref.Ind (_,_,_)))::args) ->
632 snd (HExtlib.split_nth leftno args)
636 (fun x y (tacc,pacc) ->
638 try NCicTypeChecker.typeof ~subst ~metasenv context x
639 with NCicTypeChecker.TypeCheckerFailure _ -> assert false
642 try NCicTypeChecker.typeof ~subst ~metasenv context y
643 with NCicTypeChecker.TypeCheckerFailure _ -> assert false
645 NCic.Prod ("_", NCic.Appl [eq;xty;x;yty;y],
646 NCicSubstitution.lift 1 tacc), (xty,x,yty,y)::pacc)
647 (orig_right_p @ [m]) (right_p @ [k])
648 (NCicReduction.head_beta_reduce ~delta:max_int
649 (NCicUntrusted.mk_appl outty (right_p@[k])), [])
651 (* if has_rights then
652 NCicReduction.head_beta_reduce ~delta:max_int
653 (NCic.Appl (outty ::right_p @ [k])),k
656 NCic.Appl [eq; mty; m; k],
657 (NCicSubstitution.lift 1
658 (NCicReduction.head_beta_reduce ~delta:max_int
659 (NCic.Appl (outty ::right_p @ [k]))))),k*)
662 aux context outty [] 1 mty m cty
664 let add_lambda_for_refl_m pbo eqs cty =
665 (* k lives in the right context *)
666 (* if rno <> 0 then pbo else *)
667 let rec aux = function
668 | NCic.Lambda (name,src,bo), NCic.Prod (_,_,ty) ->
669 NCic.Lambda (name,src,
671 | t,_ -> snd (List.fold_right
672 (fun (xty,x,yty,y) (n,acc) -> n+1, NCic.Lambda ("p" ^ string_of_int n,
673 NCic.Appl [eq; xty; x; yty; y],
674 NCicSubstitution.lift 1 acc)) eqs (1,t))
676 NCic.Appl [eq; mty; m; k],NCicSubstitution.lift 1 t)*)
680 let add_pi_for_refl_m context new_outty mty m lno rno =
681 (*if rno <> 0 then new_outty else*)
682 let rec aux context mty m = function
683 | NCic.Lambda (name, src, tgt) ->
684 let context = (name, NCic.Decl src)::context in
685 NCic.Lambda (name, src, aux context (NCicSubstitution.lift 1 mty) (NCicSubstitution.lift 1 m) tgt)
689 | NCic.Appl (_::params) -> (snd (HExtlib.split_nth lno params))@[m]
693 List.map (fun x -> NCic.Rel x)
694 (List.rev (HExtlib.list_seq 1 (rno+2))) in
698 try NCicTypeChecker.typeof ~subst ~metasenv context x
699 with NCicTypeChecker.TypeCheckerFailure _ -> assert false
702 try NCicTypeChecker.typeof ~subst ~metasenv context y
703 with NCicTypeChecker.TypeCheckerFailure _ -> assert false
706 ("_", NCic.Appl [eq;xty;x;yty;y],
707 (NCicSubstitution.lift 1 acc)))
710 ("_", NCic.Appl [eq;mty;m;NCic.Rel 1],
711 NCicSubstitution.lift 1 t)*)
713 aux context mty m new_outty
714 in (* }}} end helper functions *)
715 (* constructors types with left params already instantiated *)
716 let outty = NCicUntrusted.apply_subst subst context outty in
717 let cl, left_p, leftno,rno =
718 get_cl_and_left_p r outty
723 NCicTypeChecker.typeof ~subst ~metasenv context m
725 | (NCic.Const (Ref.Ref (_,Ref.Ind (_,_,_))) | NCic.Meta _) as mty -> [], mty
726 | NCic.Appl ((NCic.Const (Ref.Ref (_,Ref.Ind (_,_,_)))|NCic.Meta _)::args) as mty ->
727 snd (HExtlib.split_nth leftno args), mty
729 with NCicTypeChecker.TypeCheckerFailure _ ->
730 raise (AssertFailure(lazy "already ill-typed matched term"))
732 let mty = NCicUntrusted.apply_subst subst context mty in
733 let outty = NCicUntrusted.apply_subst subst context outty in
734 let expty = NCicUntrusted.apply_subst subst context expty in
736 keep_lambdas_and_put_expty context outty expty right_p m (rno+1)
739 (lazy ("CASE: new_outty: " ^ NCicPp.ppterm
740 ~context ~metasenv ~subst new_outty));
741 let _,pl,subst,metasenv =
743 (fun cty pbo (i, acc, s, menv) ->
744 pp (lazy ("begin iteration"));
745 (* Pi k_par, (Pi H:m=(K_i left_par k_par)),
746 * (new_)outty right_par (K_i left_par k_par) *)
748 add_params menv s context cty outty mty m i in
750 (lazy ("CASE: infty_pbo: "^ NCicPp.ppterm
751 ~context ~metasenv ~subst infty_pbo));
752 let expty_pbo, eqs = (* k is (K_i left_par k_par) *)
753 add_params menv s context cty new_outty mty m i in
755 (lazy ("CASE: expty_pbo: "^ NCicPp.ppterm
756 ~context ~metasenv ~subst expty_pbo));
757 let pbo = add_lambda_for_refl_m pbo eqs cty in
759 (lazy ("CASE: pbo: " ^ NCicPp.ppterm
760 ~context ~metasenv ~subst pbo));
761 let metasenv, subst, pbo, _ =
762 try_coercions rdb ~localise menv s context pbo
763 orig_t (*??*) infty_pbo expty_pbo perform_unification exc
766 (lazy ("CASE: pbo2: " ^ NCicPp.ppterm
767 ~context ~metasenv ~subst pbo));
768 (i-1, pbo::acc, subst, metasenv))
769 cl pl (List.length pl, [], subst, metasenv)
771 (*let metasenv, subst =
773 NCicUnification.unify rdb metasenv subst context outty new_outty
774 with _ -> raise (RefineFailure (lazy (localise orig_t, "try_coercions")))
776 let new_outty = add_pi_for_refl_m context new_outty mty m leftno rno in
777 pp (lazy ("CASE: new_outty: " ^ (NCicPp.ppterm
778 ~metasenv ~subst ~context new_outty)));
781 (fun t -> NCicTypeChecker.typeof ~subst ~metasenv context t) right_p in
783 List.map2 (fun x y -> NCic.Appl[eq_refl;x;y]) (right_tys@[mty])
785 let t = NCic.Appl (NCic.Match(r,new_outty,m,pl) :: eqs)
787 metasenv, subst, t, expty (*}}}*)
788 | NCic.Prod (nameprod, src, ty),NCic.Prod (_, src2, ty2), _ ->
789 let rec mk_fresh_name ctx firstch n =
790 let candidate = (String.make 1 firstch) ^ (string_of_int n) in
791 if (List.for_all (fun (s,_) -> s <> candidate) ctx) then candidate
792 else mk_fresh_name ctx firstch (n+1)
794 (*{{{*) pp (lazy "LAM");
795 pp (lazy ("LAM: t = " ^ NCicPp.ppterm ~metasenv ~subst ~context t));
796 let name_con = mk_fresh_name context 'c' 0
797 (*FreshNamesGenerator.mk_fresh_name
798 ~subst metasenv context ~typ:src2 Cic.Anonymous*)
800 let context_src2 = ((name_con, NCic.Decl src2) :: context) in
801 (* contravariant part: the argument of f:src->ty *)
802 let metasenv, subst, rel1, _ =
803 try_coercions rdb ~localise metasenv subst context_src2
804 (NCic.Rel 1) orig_t (NCicSubstitution.lift 1 src2)
805 (NCicSubstitution.lift 1 src) perform_unification exc
807 (* covariant part: the result of f(c x); x:src2; (c x):src *)
810 | NCic.Lambda (n,_,bo) -> n, cs_subst rel1 (NCicSubstitution.lift_from 2 1 bo)
811 | _ -> name_con, NCicUntrusted.mk_appl (NCicSubstitution.lift 1 t) [rel1]
813 (* we fix the possible dependency problem in the source ty *)
814 let ty = cs_subst rel1 (NCicSubstitution.lift_from 2 1 ty) in
815 let metasenv, subst, bo, _ =
816 try_coercions rdb ~localise metasenv subst context_src2
817 bo orig_t ty ty2 perform_unification exc
819 let coerced = NCic.Lambda (name_t,src2, bo) in
820 pp (lazy ("LAM: coerced = " ^ NCicPp.ppterm ~metasenv ~subst ~context coerced));
821 metasenv, subst, coerced, expty (*}}}*)
824 pp(lazy("try_coercion " ^
825 NCicPp.ppterm ~metasenv ~subst ~context infty ^ " |---> " ^
826 NCicPp.ppterm ~metasenv ~subst ~context expty));
828 (NCicCoercion.look_for_coercion
829 rdb metasenv subst context infty expty)
831 and force_to_sort rdb metasenv subst context t orig_t localise ty =
833 let metasenv, subst, ty =
834 NCicUnification.sortfy (Failure "sortfy") metasenv subst context ty in
835 metasenv, subst, t, ty
838 let ty = NCicReduction.whd ~subst context ty in
839 try_coercions rdb ~localise metasenv subst context
840 t orig_t ty (NCic.Sort (NCic.Type
841 (match NCicEnvironment.get_universes () with
843 | _ -> assert false))) false
844 (Uncertain (lazy (localise orig_t,
845 "The type of " ^ NCicPp.ppterm ~metasenv ~subst ~context t ^
846 " is not a sort: " ^ NCicPp.ppterm ~metasenv ~subst ~context ty)))
849 localise metasenv subst context orig_s orig_t (name,s) t (t1, t2)
851 (* force to sort is done in the Prod case in typeof *)
853 | C.Sort _, C.Sort C.Prop -> metasenv, subst, s, t, t2
854 | C.Sort (C.Type u1), C.Sort (C.Type u2) ->
855 metasenv, subst, s, t, C.Sort (C.Type (NCicEnvironment.max u1 u2))
856 | C.Sort C.Prop,C.Sort (C.Type _) -> metasenv, subst, s, t, t2
858 | C.Meta _, C.Meta (_,(_,_))
859 | C.Sort _, C.Meta (_,(_,_)) -> metasenv, subst, s, t, t2
860 | x, (C.Sort _ | C.Meta _) | _, x ->
861 let y, context, orig =
862 if x == t1 then s, context, orig_s
863 else t, ((name,C.Decl s)::context), orig_t
865 raise (RefineFailure (lazy (localise orig,Printf.sprintf
866 "%s is expected to be a type, but its type is %s that is not a sort"
867 (NCicPp.ppterm ~subst ~metasenv ~context y)
868 (NCicPp.ppterm ~subst ~metasenv ~context x))))
870 and guess_name subst ctx ty =
871 let aux initial = "#" ^ String.make 1 initial in
873 | C.Const (NReference.Ref (u,_))
874 | C.Appl (C.Const (NReference.Ref (u,_)) :: _) ->
875 aux (String.sub (NUri.name_of_uri u) 0 1).[0]
876 | C.Prod _ -> aux 'f'
879 let _,_,t,_ = NCicUtils.lookup_subst n subst in
880 guess_name subst ctx (NCicSubstitution.subst_meta lc t)
881 with NCicUtils.Subst_not_found _ -> aux 'M')
884 and eat_prods rdb ~localise force_ty metasenv subst context expty orig_t orig_he he ty_he args =
885 (*D*)inside 'E'; try let rc =
886 let rec aux metasenv subst args_so_far he ty_he xxx =
887 (*D*)inside 'V'; try let rc =
890 let res = NCicUntrusted.mk_appl he (List.rev args_so_far) in
891 pp(lazy("FORCE FINAL APPL: " ^
892 NCicPp.ppterm ~metasenv ~subst ~context res ^
893 " of type " ^ NCicPp.ppterm ~metasenv ~subst ~context ty_he
894 ^ " to type " ^ match expty with None -> "None" | Some x ->
895 NCicPp.ppterm ~metasenv ~subst ~context x));
896 (* whatever the term is, we force the type. in case of ((Lambda..) ?...)
897 * the application may also be a lambda! *)
898 force_ty false false metasenv subst context orig_t res ty_he expty
899 | NCic.Implicit `Vector::tl ->
900 let has_some_more_pis x =
901 match NCicReduction.whd ~subst context x with
902 | NCic.Meta _ | NCic.Appl (NCic.Meta _::_) -> false
906 aux metasenv subst args_so_far he ty_he tl
909 | RefineFailure _ as exc when has_some_more_pis ty_he ->
911 aux metasenv subst args_so_far he ty_he
912 (NCic.Implicit `Term :: NCic.Implicit `Vector :: tl)
914 Uncertain msg | RefineFailure msg -> raise (wrap_exc msg exc))
915 | RefineFailure msg when not (has_some_more_pis ty_he) ->
916 (* instantiating the head could change the has_some_more_pis flag *)
917 raise (Uncertain msg))
919 match NCicReduction.whd ~subst context ty_he with
921 let metasenv, subst, arg, _ =
922 typeof rdb ~localise metasenv subst context arg (Some s) in
923 let t = NCicSubstitution.subst ~avoid_beta_redexes:true arg t in
924 aux metasenv subst (arg :: args_so_far) he t tl
926 | C.Appl (C.Meta _ :: _) as t ->
927 let metasenv, subst, arg, ty_arg =
928 typeof rdb ~localise metasenv subst context arg None in
929 let name = guess_name subst context ty_arg in
930 let metasenv, _, meta, _ =
931 NCicMetaSubst.mk_meta metasenv
932 ((name,C.Decl ty_arg) :: context) `IsType
934 let flex_prod = C.Prod (name, ty_arg, meta) in
935 (* next line grants that ty_args is a type *)
936 let metasenv,subst, flex_prod, _ =
937 typeof rdb ~localise metasenv subst context flex_prod None in
939 pp (lazy ( "UNIFICATION in CTX:\n"^
940 NCicPp.ppcontext ~metasenv ~subst context
942 NCicPp.ppterm ~metasenv ~subst ~context t ^ " === " ^
943 NCicPp.ppterm ~metasenv ~subst ~context flex_prod ^ "\n"));
945 let metasenv, subst =
946 try NCicUnification.unify rdb metasenv subst context t flex_prod
947 with exc -> raise (wrap_exc (lazy (localise orig_he, Printf.sprintf
948 ("The term %s has an inferred type %s, but is applied to the" ^^
949 " argument %s of type %s")
950 (NCicPp.ppterm ~metasenv ~subst ~context he)
951 (NCicPp.ppterm ~metasenv ~subst ~context t)
952 (NCicPp.ppterm ~metasenv ~subst ~context arg)
953 (NCicPp.ppterm ~metasenv ~subst ~context ty_arg)))
955 | NCicUnification.UnificationFailure m ->
956 NCicUnification.Uncertain m
958 (* XXX coerce to funclass *)
960 let meta = NCicSubstitution.subst ~avoid_beta_redexes:true arg meta in
961 aux metasenv subst (arg :: args_so_far) he meta tl
962 | C.Match (_,_,C.Meta _,_)
963 | C.Match (_,_,C.Appl (C.Meta _ :: _),_)
964 | C.Appl (C.Const (NReference.Ref (_, NReference.Fix _)) :: _) ->
965 raise (Uncertain (lazy (localise orig_he, Printf.sprintf
966 ("The term %s is here applied to %d arguments but expects " ^^
967 "only %d arguments") (NCicPp.ppterm ~metasenv ~subst ~context he)
968 (List.length args) (List.length args_so_far))))
970 let metasenv, subst, newhead, newheadty =
971 try_coercions rdb ~localise metasenv subst context
972 (NCicUntrusted.mk_appl he (List.rev args_so_far)) orig_he ty
973 (NCic.Prod ("_",NCic.Implicit `Term,NCic.Implicit `Term))
975 (RefineFailure (lazy (localise orig_he, Printf.sprintf
976 ("The term %s is here applied to %d arguments but expects " ^^
977 "only %d arguments") (NCicPp.ppterm ~metasenv ~subst ~context he)
978 (List.length args) (List.length args_so_far))))
980 aux metasenv subst [] newhead newheadty (arg :: tl)
981 (*D*)in outside true; rc with exc -> outside false; raise exc
983 (* We need to reverse the order of the new created metas since they
984 are pushed on top of the metasenv in the wrong order *)
985 let highest_meta = NCicMetaSubst.maxmeta () in
986 let metasenv, subst, newhead, newheadty =
987 aux metasenv subst [] he ty_he args in
988 let metasenv_old,metasenv_new =
989 List.partition (fun (i,_) -> i <= highest_meta) metasenv
991 (List.rev metasenv_new) @ metasenv_old, subst, newhead, newheadty
992 (*D*)in outside true; rc with exc -> outside false; raise exc
995 let rec first f l1 l2 =
997 | x1::tl1, x2::tl2 ->
998 (try f x1 x2 with Not_found -> first f tl1 tl2)
999 | _ -> raise Not_found
1002 let rec find add dt t =
1007 | C.Meta (_,(_,C.Ctx dl)), C.Meta (_,(_,C.Ctx l))
1008 | C.Appl dl,C.Appl l -> dl,l
1009 | C.Lambda (_,ds,dt), C.Lambda (_,s,t)
1010 | C.Prod (_,ds,dt), C.Prod (_,s,t) -> [ds;dt],[s;t]
1011 | C.LetIn (_,ds,db,dt), C.LetIn (_,s,b,t) -> [ds;db;dt],[s;b;t]
1012 | C.Match (_,dot,dt,dl), C.Match (_,ot,t,l) -> (dot::dt::dl),(ot::t::l)
1013 | _ -> raise Not_found
1015 first (find add) dl l
1018 let relocalise old_localise dt t add =
1020 (try find add dt t with Not_found -> assert false)
1023 let undebruijnate inductive ref t rev_fl =
1024 let len = List.length rev_fl in
1025 NCicSubstitution.psubst (fun x -> x)
1027 (fun (_,_,rno,_,_,_) i ->
1028 let i = len - i - 1 in
1030 (if inductive then NReference.mk_fix i rno ref
1031 else NReference.mk_cofix i ref))
1038 rdb ?(localise=fun _ -> Stdpp.dummy_loc) (uri,height,metasenv,subst,obj)
1041 | C.Constant (relevance, name, bo, ty, attr) ->
1042 let metasenv, subst, ty =
1043 check_type rdb ~localise metasenv subst [] ty in
1044 let metasenv, subst, bo, ty, height =
1047 let metasenv, subst, bo, ty =
1048 typeof rdb ~localise metasenv subst [] bo (Some ty) in
1049 let height = (* XXX recalculate *) height in
1050 metasenv, subst, Some bo, ty, height
1051 | None -> metasenv, subst, None, ty, 0
1053 uri, height, metasenv, subst,
1054 C.Constant (relevance, name, bo, ty, attr)
1055 | C.Fixpoint (inductive, fl, attr) ->
1056 let len = List.length fl in
1057 let types, metasenv, subst, rev_fl =
1059 (fun (types, metasenv, subst, fl) (relevance,name,k,ty,bo) ->
1060 let metasenv, subst, ty =
1061 check_type rdb ~localise metasenv subst [] ty in
1062 let dbo = NCicTypeChecker.debruijn uri len [] ~subst bo in
1063 let localise = relocalise localise dbo bo in
1064 (name,C.Decl ty)::types,
1065 metasenv, subst, (relevance,name,k,ty,dbo,localise)::fl
1066 ) ([], metasenv, subst, []) fl (* XXX kl rimosso nel nucleo *)
1068 let metasenv, subst, fl =
1070 (fun (metasenv,subst,fl) (relevance,name,k,ty,dbo,localise) ->
1071 let metasenv, subst, dbo, ty =
1072 typeof rdb ~localise metasenv subst types dbo (Some ty)
1074 metasenv, subst, (relevance,name,k,ty,dbo)::fl)
1075 (metasenv, subst, []) rev_fl
1077 let height = (* XXX recalculate *) height in
1080 (fun (relevance,name,k,ty,dbo) ->
1082 undebruijnate inductive
1083 (NReference.reference_of_spec uri
1084 (if inductive then NReference.Fix (0,k,0)
1085 else NReference.CoFix 0)) dbo rev_fl
1087 relevance,name,k,ty,bo)
1090 uri, height, metasenv, subst,
1091 C.Fixpoint (inductive, fl, attr)
1092 | C.Inductive (ind, leftno, itl, attr) ->
1093 let len = List.length itl in
1094 let metasenv,subst,rev_itl,tys =
1096 (fun (metasenv,subst,res,ctx) (relevance,n,ty,cl) ->
1097 let metasenv, subst, ty =
1098 check_type rdb ~localise metasenv subst [] ty in
1099 metasenv,subst,(relevance,n,ty,cl)::res,(n,NCic.Decl ty)::ctx
1100 ) (metasenv,subst,[],[]) itl in
1101 let metasenv,subst,itl,_ =
1103 (fun (metasenv,subst,res,i) (it_relev,n,ty,cl) ->
1104 let context,ty_sort = NCicReduction.split_prods ~subst [] ~-1 ty in
1105 let sx_context_ty_rev,_= HExtlib.split_nth leftno (List.rev context) in
1106 let metasenv,subst,cl =
1108 (fun (k_relev,n,te) (metasenv,subst,res) ->
1110 try snd (HExtlib.split_nth leftno k_relev)
1111 with Failure _ -> k_relev in
1112 let te = NCicTypeChecker.debruijn uri len [] ~subst te in
1113 let metasenv, subst, te =
1114 check_type rdb ~localise metasenv subst tys te in
1115 let context,te = NCicReduction.split_prods ~subst tys leftno te in
1116 let _,chopped_context_rev =
1117 HExtlib.split_nth (List.length tys) (List.rev context) in
1118 let sx_context_te_rev,_ =
1119 HExtlib.split_nth leftno chopped_context_rev in
1120 let metasenv,subst,_ =
1123 (fun (metasenv,subst,context) item1 item2 ->
1124 let (metasenv,subst),convertible =
1126 match item1,item2 with
1127 (n1,C.Decl ty1),(n2,C.Decl ty2) ->
1129 NCicUnification.unify rdb ~test_eq_only:true metasenv
1130 subst context ty1 ty2,true
1132 (metasenv,subst),false
1133 | (n1,C.Def (bo1,ty1)),(n2,C.Def (bo2,ty2)) ->
1135 let metasenv,subst =
1136 NCicUnification.unify rdb ~test_eq_only:true metasenv
1137 subst context ty1 ty2
1139 NCicUnification.unify rdb ~test_eq_only:true metasenv
1140 subst context bo1 bo2,true
1142 (metasenv,subst),false
1143 | _,_ -> (metasenv,subst),false
1145 | NCicUnification.Uncertain _
1146 | NCicUnification.UnificationFailure _ ->
1147 (metasenv,subst),false
1152 | _,C.Def (b,_) -> b in
1153 if not convertible then
1154 raise (RefineFailure (lazy (localise term2,
1155 ("Mismatch between the left parameters of the constructor " ^
1156 "and those of its inductive type"))))
1158 metasenv,subst,item1::context
1159 ) (metasenv,subst,tys) sx_context_ty_rev sx_context_te_rev
1160 with Invalid_argument "List.fold_left2" -> assert false in
1161 let metasenv, subst =
1162 let rec aux context (metasenv,subst) = function
1163 | NCic.Meta _ -> metasenv, subst
1164 | NCic.Implicit _ -> metasenv, subst
1165 | NCic.Appl (NCic.Rel i :: args) as t
1166 when i > List.length context - len ->
1167 let lefts, _ = HExtlib.split_nth leftno args in
1168 let ctxlen = List.length context in
1169 let (metasenv, subst), _ =
1171 (fun ((metasenv, subst),l) arg ->
1172 NCicUnification.unify rdb
1173 ~test_eq_only:true metasenv subst context arg
1174 (NCic.Rel (ctxlen - len - l)), l+1
1176 ((metasenv, subst), 0) lefts
1179 | t -> NCicUtils.fold (fun e c -> e::c) context aux
1182 aux context (metasenv,subst) te
1184 let con_sort= NCicTypeChecker.typeof ~subst ~metasenv context te in
1186 NCicReduction.whd ~subst context con_sort,
1187 NCicReduction.whd ~subst [] ty_sort
1189 (C.Sort (C.Type u1) as s1), (C.Sort (C.Type u2) as s2) ->
1190 if not (NCicEnvironment.universe_leq u1 u2) then
1193 (lazy(localise te, "The type " ^
1194 NCicPp.ppterm ~metasenv ~subst ~context s1 ^
1195 " of the constructor is not included in the inductive"^
1197 NCicPp.ppterm ~metasenv ~subst ~context s2)))
1198 | C.Sort _, C.Sort C.Prop
1199 | C.Sort _, C.Sort C.Type _ -> ()
1204 "Wrong constructor or inductive arity shape"))));
1205 (* let's check also the positivity conditions *)
1208 (NCicTypeChecker.are_all_occurrences_positive
1209 ~subst context uri leftno (i+leftno) leftno (len+leftno) te)
1214 "Non positive occurence in " ^
1215 NCicPp.ppterm ~metasenv ~subst ~context te)))
1217 let relsno = List.length itl + leftno in
1219 NCicSubstitution.psubst
1224 NCic.Const (NReference.reference_of_spec uri
1225 (NReference.Ind (ind,relsno - i,leftno))))
1226 (HExtlib.list_seq 1 (relsno+1))
1230 (fun (name,decl) te ->
1232 NCic.Decl ty -> NCic.Prod (name,ty,te)
1233 | NCic.Def (bo,ty) -> NCic.LetIn (name,ty,bo,te)
1234 ) sx_context_te_rev te
1236 metasenv,subst,(k_relev,n,te)::res
1237 ) cl (metasenv,subst,[])
1239 metasenv,subst,(it_relev,n,ty,cl)::res,i+1
1240 ) (metasenv,subst,[],1) rev_itl
1242 uri, height, metasenv, subst, C.Inductive (ind, leftno, itl, attr)
1245 (* vim:set foldmethod=marker: *)