X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_refiner%2FnCicRefiner.ml;h=64911e198337ef472e010f2324dec30180fa7ab8;hb=497563d35f24bbcbcbd8d669d73284b76a823118;hp=ed14180aa670c7f41c6f8f28706ef53db6b4b419;hpb=1b70a1f66be53f76e475383e86d63c2b5c1fbcaa;p=helm.git

diff --git a/helm/software/components/ng_refiner/nCicRefiner.ml b/helm/software/components/ng_refiner/nCicRefiner.ml
index ed14180aa..64911e198 100644
--- a/helm/software/components/ng_refiner/nCicRefiner.ml
+++ b/helm/software/components/ng_refiner/nCicRefiner.ml
@@ -301,9 +301,9 @@ let rec typeof hdb
            NCicUnification.unify hdb metasenv subst context resty expty 
       in
 *)
-      let _, metasenv, subst, pl_rev =
-        List.fold_left
-          (fun (j, metasenv, subst, branches) p ->
+      let _, metasenv, subst, pl =
+        List.fold_right
+          (fun p (j, metasenv, subst, branches) ->
               let cons = 
                 let cons = Ref.mk_constructor j r in
                 if parameters = [] then C.Const cons
@@ -319,12 +319,12 @@ let rec typeof hdb
                NCicPp.ppterm ~metasenv ~subst ~context ty_branch ));
               let metasenv, subst, p, _ = 
                 typeof_aux metasenv subst context (Some ty_branch) p in
-              j+1, metasenv, subst, p :: branches)
-          (1, metasenv, subst, []) pl
+              j-1, metasenv, subst, p :: branches)
+          pl (List.length pl, metasenv, subst, [])
       in
       let resty = C.Appl (outtype::arguments@[term]) in
       let resty = NCicReduction.head_beta_reduce ~subst resty in
-      metasenv, subst, C.Match (r, outtype, term, List.rev pl_rev),resty
+      metasenv, subst, C.Match (r, outtype, term, pl),resty
     | C.Match _ -> assert false
     in
     pp (lazy (NCicPp.ppterm ~metasenv ~subst ~context t ^ " :: "^
@@ -384,7 +384,7 @@ and force_to_sort hdb
   match NCicReduction.whd ~subst context ty with
   | C.Meta (_,(0,(C.Irl 0 | C.Ctx []))) as ty -> 
      metasenv, subst, t, ty
-  | C.Meta (i,(_,(C.Irl 0 | C.Ctx []))) -> assert false (*CSC: ???
+  | C.Meta (_i,(_,(C.Irl 0 | C.Ctx []))) -> assert false (*CSC: ???
      metasenv, subst, t, C.Meta(i,(0,C.Irl 0)) *)
   | C.Meta (i,(_,lc)) ->
      let len = match lc with C.Irl len->len | C.Ctx l->List.length l in
@@ -424,6 +424,20 @@ and sort_of_prod
          (NCicPp.ppterm ~subst ~metasenv ~context y) 
          (NCicPp.ppterm ~subst ~metasenv ~context x))))
 
+and guess_name subst ctx ty = 
+  let aux initial = "#" ^ String.make 1 initial in
+  match ty with
+  | C.Const (NReference.Ref (u,_))
+  | C.Appl (C.Const (NReference.Ref (u,_)) :: _) ->
+      aux (String.sub (NUri.name_of_uri u) 0 1).[0] 
+  | C.Prod _ -> aux 'f' 
+  | C.Meta (n,lc) -> 
+      (try
+         let _,_,t,_ = NCicUtils.lookup_subst n subst in
+         guess_name subst ctx (NCicSubstitution.subst_meta lc t)
+      with NCicUtils.Subst_not_found _ -> aux 'M')
+  | _ -> aux 'H' 
+
 and eat_prods hdb
   ~localise ~look_for_coercion metasenv subst context orig_he he ty_he args 
 =
@@ -443,11 +457,12 @@ and eat_prods hdb
           let metasenv, subst, arg, ty_arg = 
             typeof hdb ~look_for_coercion ~localise 
               metasenv subst context arg None in
+          let name = guess_name subst context ty_arg in
           let metasenv, _, meta, _ = 
             NCicMetaSubst.mk_meta metasenv 
-              (("_",C.Decl ty_arg) :: context) `Type
+              ((name,C.Decl ty_arg) :: context) `Type
           in
-          let flex_prod = C.Prod ("_", ty_arg, meta) in
+          let flex_prod = C.Prod (name, ty_arg, meta) in
           (* next line grants that ty_args is a type *)
           let metasenv,subst, flex_prod, _ =
            typeof hdb ~look_for_coercion ~localise metasenv subst
@@ -490,7 +505,15 @@ and eat_prods hdb
           in
           aux metasenv subst [] newhead newheadty (arg :: tl)
   in
-   aux metasenv subst [] he ty_he args
+   (* We need to reverse the order of the new created metas since they
+      are pushed on top of the metasenv in the wrong order *)
+   let highest_meta = NCicMetaSubst.maxmeta () in
+   let metasenv, subst, newhead, newheadty = 
+    aux metasenv subst [] he ty_he args in
+   let metasenv_old,metasenv_new =
+    List.partition (fun (i,_) -> i <= highest_meta) metasenv
+   in
+    (List.rev metasenv_new) @ metasenv_old, subst, newhead, newheadty
   (*D*)in outside(); rc with exc -> outside (); raise exc
 ;;