+(* fix proof takes in input a term and try to build a metasenv for it *)
+
+let fix_proof metasenv context all_implicits p =
+ let rec aux metasenv n p =
+ match p with
+ | Cic.Meta (i,_) ->
+ if all_implicits then
+ metasenv,Cic.Implicit None
+ else
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable context
+ in
+ let meta = CicSubstitution.lift n (Cic.Meta (i,irl)) in
+ let metasenv =
+ try
+ let _ = CicUtil.lookup_meta i metasenv in metasenv
+ with CicUtil.Meta_not_found _ ->
+ debug_print (lazy ("not found: "^(string_of_int i)));
+ let metasenv,j = CicMkImplicit.mk_implicit_type metasenv [] context in
+ (i,context,Cic.Meta(j,irl))::metasenv
+ in
+ metasenv,meta
+ | Cic.Appl l ->
+ let metasenv,l=
+ List.fold_right
+ (fun a (metasenv,l) ->
+ let metasenv,a' = aux metasenv n a in
+ metasenv,a'::l)
+ l (metasenv,[])
+ in metasenv,Cic.Appl l
+ | Cic.Lambda(name,s,t) ->
+ let metasenv,s = aux metasenv n s in
+ let metasenv,t = aux metasenv (n+1) t in
+ metasenv,Cic.Lambda(name,s,t)
+ | Cic.Prod(name,s,t) ->
+ let metasenv,s = aux metasenv n s in
+ let metasenv,t = aux metasenv (n+1) t in
+ metasenv,Cic.Prod(name,s,t)
+ | Cic.LetIn(name,s,ty,t) ->
+ let metasenv,s = aux metasenv n s in
+ let metasenv,ty = aux metasenv n ty in
+ let metasenv,t = aux metasenv (n+1) t in
+ metasenv,Cic.LetIn(name,s,ty,t)
+ | Cic.Const(uri,ens) ->
+ let metasenv,ens =
+ List.fold_right
+ (fun (v,a) (metasenv,ens) ->
+ let metasenv,a' = aux metasenv n a in
+ metasenv,(v,a')::ens)
+ ens (metasenv,[])
+ in
+ metasenv,Cic.Const(uri,ens)
+ | t -> metasenv,t
+ in
+ aux metasenv 0 p
+;;
+
+let fix_metasenv context metasenv =
+ List.fold_left
+ (fun m (i,c,t) ->
+ let m,t = fix_proof m context false t in
+ let m = List.filter (fun (j,_,_) -> j<>i) m in
+ (i,context,t)::m)
+ metasenv metasenv
+;;
+
+
+(* status: input proof status
+ * goalproof: forward steps on goal
+ * newproof: backward steps
+ * subsumption_id: the equation used if goal is closed by subsumption
+ * (0 if not closed by subsumption) (DEBUGGING: can be safely removed)
+ * subsumption_subst: subst to make newproof and goalproof match
+ * proof_menv: final metasenv
+ *)
+
+let build_proof
+ bag status
+ goalproof newproof subsumption_id subsumption_subst proof_menv
+=
+ if proof_menv = [] then debug_print (lazy "+++++++++++++++VUOTA")
+ else debug_print (lazy (CicMetaSubst.ppmetasenv [] proof_menv));