From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Fri, 8 Jul 2005 08:10:45 +0000 (+0000)
Subject: An impossible case changed to an assert false.
X-Git-Tag: V_0_7_1~4
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=e1518f70bdddd0bc19cdf34e6fc9564e158ae35e;p=helm.git

An impossible case changed to an assert false.
---

diff --git a/helm/ocaml/cic_proof_checking/cicReduction.ml b/helm/ocaml/cic_proof_checking/cicReduction.ml
index 8b9a0d22e..aaca61942 100644
--- a/helm/ocaml/cic_proof_checking/cicReduction.ml
+++ b/helm/ocaml/cic_proof_checking/cicReduction.ml
@@ -1063,8 +1063,8 @@ let rec normalize ?(delta=true) ?(subst=[]) ctx term =
       let s' = aux ctx s in
       C.Lambda (n, s', aux ((decl n s')::ctx) t)
   | C.LetIn (n,s,t) ->
-      let s' = aux ctx s in
-      C.LetIn (n, s, aux ((def n s')::ctx) t)
+      (* the term is already in weak head normal form *)
+      assert false
   | C.Appl (h::l) -> C.Appl (h::(List.map (aux ctx) l))
   | C.Appl [] -> assert false
   | C.Const (uri,exp_named_subst) ->
@@ -1076,6 +1076,7 @@ let rec normalize ?(delta=true) ?(subst=[]) ctx term =
         List.map (fun (n,t) -> n,aux ctx t) exp_named_subst)
   | C.MutCase (sp,i,outt,t,pl) ->
       C.MutCase (sp,i, aux ctx outt, aux ctx t, List.map (aux ctx) pl)
+(*CSC: to be completed, I suppose *)
   | C.Fix _ -> t 
   | C.CoFix _ -> t