From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Mon, 18 May 2009 11:54:20 +0000 (+0000)
Subject: 1) order of processing of case branches reverted (to generate metas in
X-Git-Tag: make_still_working~3967
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=c4ea5fdf898b6bbeff10e44046620e8b5bdefbb7;p=helm.git

1) order of processing of case branches reverted (to generate metas in
   left-to-right order)
2) metas generated by eat_prods are now re-ordered so that they occur
   in left-to-right order
---

diff --git a/helm/software/components/ng_refiner/nCicRefiner.ml b/helm/software/components/ng_refiner/nCicRefiner.ml
index ed14180aa..a724ae1cb 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
@@ -490,7 +490,15 @@ 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
 ;;