;;
-let lookup_subst meta subst =
+let rec lookup_subst meta subst =
match meta with
| Cic.Meta (i, _) -> (
- try let _, (_, t, _) = List.find (fun (m, _) -> m = i) subst in t
+ try let _, (_, t, _) = List.find (fun (m, _) -> m = i) subst
+ in lookup_subst t subst
with Not_found -> meta
)
- | _ -> assert false
+ | _ -> meta
;;
+let locked menv i =
+ List.exists (fun (j,_,_) -> i = j) menv
+;;
-let unification_simple metasenv context t1 t2 ugraph =
+let unification_simple locked_menv metasenv context t1 t2 ugraph =
let module C = Cic in
let module M = CicMetaSubst in
let module U = CicUnification in
let rec unif subst menv s t =
let s = match s with C.Meta _ -> lookup s subst | _ -> s
and t = match t with C.Meta _ -> lookup t subst | _ -> t
+
in
match s, t with
| s, t when s = t -> subst, menv
- | C.Meta (i, _), C.Meta (j, _) when i > j ->
+ | C.Meta (i, _), C.Meta (j, _)
+ when (locked locked_menv i) &&(locked locked_menv j) ->
+ raise
+ (U.UnificationFailure (lazy "Inference.unification.unif"))
+ | C.Meta (i, _), C.Meta (j, _) when (locked locked_menv i) ->
+ unif subst menv t s
+ | C.Meta (i, _), C.Meta (j, _) when (i > j) && not (locked locked_menv j) ->
unif subst menv t s
| C.Meta _, t when occurs_check subst s t ->
raise
(U.UnificationFailure (lazy "Inference.unification.unif"))
+ | C.Meta (i, l), t when (locked locked_menv i) ->
+ raise
+ (U.UnificationFailure (lazy "Inference.unification.unif"))
| C.Meta (i, l), t -> (
try
let _, _, ty = CicUtil.lookup_meta i menv in
List.rev subst, menv, ugraph
;;
+let profiler = HExtlib.profile "flatten"
-let unification metasenv1 metasenv2 context t1 t2 ugraph =
- let metasenv = metasenv1 metasenv2 in
+let unification_aux b metasenv1 metasenv2 context t1 t2 ugraph =
+ let metasenv = metasenv1 @ metasenv2 in
let subst, menv, ug =
if not (is_simple_term t1) || not (is_simple_term t2) then (
debug_print
(lazy
(Printf.sprintf "NOT SIMPLE TERMS: %s %s"
(CicPp.ppterm t1) (CicPp.ppterm t2)));
- CicUnification.fo_unif metasenv context t1 t2 ugraph
+ raise (CicUnification .UnificationFailure (lazy "Inference.unification.unif"))
) else
- unification_simple metasenv context t1 t2 ugraph
+ if b then
+ (* full unification *)
+ unification_simple [] metasenv context t1 t2 ugraph
+ else
+ (* matching: metasenv1 is locked *)
+ unification_simple metasenv1 metasenv context t1 t2 ugraph
in
if Utils.debug_res then
ignore(check_disjoint_invariant subst menv "unif");
- let subst =
+ let flatten subst =
List.map
(fun (i, (context, term, ty)) ->
let context = CicMetaSubst.apply_subst_context subst context in
let term = CicMetaSubst.apply_subst subst term in
let ty = CicMetaSubst.apply_subst subst ty in
- (i, (context, term, ty))) subst in
-(*
- let rec fix_term = function
- | (Cic.Meta (i, l) as t) ->
- let t' = lookup_subst t subst in
- if t <> t' then fix_term t' else t
- | Cic.Appl l -> Cic.Appl (List.map fix_term l)
- | t -> t
+ (i, (context, term, ty))) subst
in
- let rec fix_subst = function
- | [] -> []
- | (i, (c, t, ty))::tl -> (i, (c, fix_term t, fix_term ty))::(fix_subst tl)
- in
- fix_subst subst, menv, ug *)
- subst, menv, ug
+ let flatten subst = profiler.HExtlib.profile flatten subst in
+ let subst = flatten subst in
+ subst, menv, ug
+;;
+
+exception MatchingFailure;;
+
+let matching1 metasenv1 metasenv2 context t1 t2 ugraph =
+ try
+ unification_aux false metasenv1 metasenv2 context t1 t2 ugraph
+ with
+ CicUnification .UnificationFailure _ ->
+ raise MatchingFailure
;;
+let unification = unification_aux true
+;;
+
+
+(*
let unification metasenv1 metasenv2 context t1 t2 ugraph =
let (subst, metasenv, ugraph) =
CicUnification.fo_unif (metasenv1@metasenv2) context t1 t2 ugraph in
(subst, metasenv, ugraph)
;;
-
-exception MatchingFailure;;
+*)
(*
it perform unification in the union metasenv, then check that
the first metasenv has not changed *)
-let matching metasenv1 metasenv2 context t1 t2 ugraph =
+
+let matching2 metasenv1 metasenv2 context t1 t2 ugraph =
let subst, metasenv, ugraph =
try
unification metasenv1 metasenv2 context t1 t2 ugraph
ignore(check_disjoint_invariant subst metasenv "qua-2");
(* let us unfold subst *)
if metasenv = metasenv1 then
- subst, metasenv, ugraph (* everything is fine *)
+ let subst =
+ List.map
+ (fun (i, (context, term, ty)) ->
+ let context = CicMetaSubst.apply_subst_context subst context in
+ let term = CicMetaSubst.apply_subst subst term in
+ let ty = CicMetaSubst.apply_subst subst ty in
+ (i, (context, term, ty))) subst in
+ subst, metasenv, ugraph (* everything is fine *)
else
(* let us unfold subst *)
+ (*
let subst =
List.map
(fun (i, (context, term, ty)) ->
let term = CicMetaSubst.apply_subst subst term in
let ty = CicMetaSubst.apply_subst subst ty in
(i, (context, term, ty))) subst in
+ *)
(* let us revert Meta-Meta in subst privileging metasenv1 *)
let subst, metasenv =
List.fold_left
((j, (c, Cic.Meta (i, lc), ty))::subst,
(i,c,ty)::metasenv')
|_ -> s::subst,metasenv) ([],metasenv) subst
- in
+ in
(* finally, let us chek again that metasenv = metasenv1 *)
if metasenv = metasenv1 then
subst, metasenv, ugraph
else raise MatchingFailure
;;
+(* debug
+let matching metasenv1 metasenv2 context t1 t2 ugraph =
+ let rc1 =
+ try Some (matching1 metasenv1 metasenv2 context t1 t2 ugraph)
+ with MatchingFailure -> None
+ in
+ let rc2 =
+ try
+ Some (matching2 metasenv1 metasenv2 context t1 t2 ugraph)
+ with MatchingFailure -> None
+ in
+ match rc1,rc2 with
+ | Some (s,m,g) , None ->
+ prerr_endline (CicPp.ppterm t1);
+ prerr_endline (CicPp.ppterm t2);
+ prerr_endline "SOLO NOI";
+ prerr_endline (CicMetaSubst.ppsubst s);
+ s,m,g
+ | None , Some _ ->
+ prerr_endline (CicPp.ppterm t1);
+ prerr_endline (CicPp.ppterm t2);
+ prerr_endline "SOLO LUI";
+ assert false
+ | None, None -> raise MatchingFailure
+ | Some (s,m,g), Some (s',m',g') ->
+ let s = List.sort (fun (i,_) (j,_) -> i - j) s in
+ let s' = List.sort (fun (i,_) (j,_) -> i - j) s' in
+ if s <> s' then
+ begin
+ prerr_endline (CicMetaSubst.ppsubst s);
+ prerr_endline (CicMetaSubst.ppsubst s');
+ prerr_endline (CicPp.ppterm t1);
+ prerr_endline (CicPp.ppterm t2);
+ end;
+ s,m,g
+*)
+let matching = matching1;;
+
let check_eq context msg eq =
let w, proof, (eq_ty, left, right, order), metas, args = eq in
if not (fst (CicReduction.are_convertible ~metasenv:metas context eq_ty
projects / helm.git / blobdiff