From 849c15ec9cc74737cbf5d392fa565e0630f903d7 Mon Sep 17 00:00:00 2001
From: Enrico Tassi <enrico.tassi@inria.fr>
Date: Mon, 21 Sep 2009 12:09:14 +0000
Subject: [PATCH] new implementation of delift_type_wrt_term, that call delift
 directly

---
 .../components/ng_refiner/nCicUnification.ml  | 35 +++++++++++++------
 1 file changed, 24 insertions(+), 11 deletions(-)

diff --git a/helm/software/components/ng_refiner/nCicUnification.ml b/helm/software/components/ng_refiner/nCicUnification.ml
index dff242970..ce109f2af 100644
--- a/helm/software/components/ng_refiner/nCicUnification.ml
+++ b/helm/software/components/ng_refiner/nCicUnification.ml
@@ -154,11 +154,16 @@ let rec lambda_intros rdb metasenv subst context t args =
        in
        metasenv, subst, bo
    | (arg,ty)::tail ->
+       pp(lazy("arg{ " ^ 
+         NCicPp.ppterm ~metasenv ~subst ~context:context_of_args arg ^  ":" ^
+         NCicPp.ppterm ~metasenv ~subst ~context:context_of_args ty));
        let metasenv, subst, telescopic_ty = 
-(* XXX         if processed_args = [] then metasenv, subst, ty else  *)
+         if processed_args = [] then metasenv, subst, ty else
+         let _ = pp(lazy("delift")) in
          delift_type_wrt_terms rdb metasenv subst context_of_args ty 
            (List.rev processed_args)
        in
+       pp(lazy("arg}"));
        let name = "HBeta"^string_of_int n in
        let metasenv, subst, bo =
         mk_lambda metasenv subst ((name,NCic.Decl telescopic_ty)::context) (n+1)
@@ -166,7 +171,12 @@ let rec lambda_intros rdb metasenv subst context t args =
        in
         metasenv, subst, NCic.Lambda (name, telescopic_ty, bo)
  in
+ pp(lazy("LAMBDA_INTROS{ " ^ 
+   NCicPp.ppterm ~metasenv ~subst ~context t ^  ":" ^
+   NCicPp.ppterm ~metasenv ~subst ~context tty ^ " over " ^ 
+   String.concat "," (List.map (NCicPp.ppterm ~metasenv ~subst ~context)args)));
  let rc = mk_lambda metasenv subst context 0 [] argsty in
+ pp(lazy("LAMBDA_INTROS}"));
  rc
 
 and instantiate rdb test_eq_only metasenv subst context n lc t swap =
@@ -666,17 +676,20 @@ pp (lazy (string_of_bool norm1 ^ " ?? " ^ string_of_bool norm2));
  (*D*)  in outside(); rc with exn -> outside (); raise exn 
 
 and delift_type_wrt_terms rdb metasenv subst context t args =
-  let metasenv, _, instance, _ =
-    NCicMetaSubst.mk_meta metasenv context `Type in
-  let meta_applied = NCicUntrusted.mk_appl instance args in
-  let metasenv,subst,meta_applied,_ =
-    !refiner_typeof ((rdb:> NRstatus.status)#set_coerc_db NCicCoercion.empty_db)
-      metasenv subst context meta_applied None
+  let (metasenv, subst), t =
+   try
+    NCicMetaSubst.delift 
+      ~unify:(fun m s c t1 t2 -> 
+         let ind = !indent in
+         let res = 
+           try Some (unify rdb false m s c t1 t2 )
+           with UnificationFailure _ | Uncertain _ -> None
+         in
+         indent := ind; res)
+      metasenv subst context 0 (0,NCic.Ctx (args @ 
+        List.rev (mk_irl (List.length context)))) t
+   with NCicMetaSubst.MetaSubstFailure _ -> (metasenv, subst), t
   in
-  let metasenv, subst =
-   unify rdb true metasenv subst context meta_applied t in
-  let t = NCicSubstitution.lift (List.length args) instance in
-  let t = NCicUntrusted.mk_appl t (mk_irl (List.length args)) in
    metasenv, subst, t
 ;;
 
-- 
2.39.2