X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=components%2Fcic_proof_checking%2FcicReduction.ml;h=b636c2a729aa2ef688d99a8c8a42e0c173b795f5;hb=9dec56b0dcc55853244fa5ca401c1c19dac3d9d2;hp=de3bf61f4dd6e5a8092cca6466476023e99cbb14;hpb=afc19735fc5b88c8e841d6e62e58f21a81f06d8c;p=helm.git

diff --git a/components/cic_proof_checking/cicReduction.ml b/components/cic_proof_checking/cicReduction.ml
index de3bf61f4..b636c2a72 100644
--- a/components/cic_proof_checking/cicReduction.ml
+++ b/components/cic_proof_checking/cicReduction.ml
@@ -664,14 +664,12 @@ if List.mem uri params then debug_print (lazy "---- OK2") ;
              (k', e', ens', C.MutConstruct (_,_,j,_), []) ->
               reduce (k, e, ens, (List.nth pl (j-1)), s)
            | (k', e', ens', C.MutConstruct (_,_,j,_), s') ->
-              let (arity, r) =
+              let r =
                 let o,_ = 
                   CicEnvironment.get_cooked_obj CicUniv.empty_ugraph mutind 
                 in
                   match o with
-                      C.InductiveDefinition (s,ingredients,r,_) ->
-                        let (_,_,arity,_) = List.nth s i in
-                          (arity,r)
+                      C.InductiveDefinition (_,_,r,_) -> r
                     | _ -> raise WrongUriToInductiveDefinition
               in
                let ts =
@@ -1118,7 +1116,7 @@ let normalize ?delta ?subst ctx term =
   
   
 (* performs an head beta/cast reduction *)
-let rec head_beta_reduce =
+let rec head_beta_reduce ?(delta=false) =
  function
     (Cic.Appl (Cic.Lambda (_,_,t)::he'::tl')) ->
       let he'' = CicSubstitution.subst he' t in
@@ -1130,8 +1128,33 @@ let rec head_beta_reduce =
             Cic.Appl l -> Cic.Appl (l@tl')
           | _ -> Cic.Appl (he''::tl')
         in
-         head_beta_reduce he'''
-  | Cic.Cast (te,_) -> head_beta_reduce te
+         head_beta_reduce ~delta he'''
+  | Cic.Cast (te,_) -> head_beta_reduce ~delta te
+  | Cic.Appl (Cic.Const (uri,ens)::tl) as t when delta=true ->
+     let bo =
+      match fst (CicEnvironment.get_cooked_obj CicUniv.empty_ugraph uri) with
+         Cic.Constant (_,bo,_,_,_) -> bo
+       | Cic.Variable _ -> raise ReferenceToVariable
+       | Cic.CurrentProof (_,_,bo,_,_,_) -> Some bo
+       | Cic.InductiveDefinition _ -> raise ReferenceToInductiveDefinition
+     in
+      (match bo with
+          None -> t
+        | Some bo ->
+           head_beta_reduce
+            ~delta (Cic.Appl ((CicSubstitution.subst_vars ens bo)::tl)))
+  | Cic.Const (uri,ens) as t when delta=true ->
+     let bo =
+      match fst (CicEnvironment.get_cooked_obj CicUniv.empty_ugraph uri) with
+         Cic.Constant (_,bo,_,_,_) -> bo
+       | Cic.Variable _ -> raise ReferenceToVariable
+       | Cic.CurrentProof (_,_,bo,_,_,_) -> Some bo
+       | Cic.InductiveDefinition _ -> raise ReferenceToInductiveDefinition
+     in
+      (match bo with
+          None -> t
+        | Some bo ->
+           head_beta_reduce ~delta (CicSubstitution.subst_vars ens bo))
   | t -> t
 
 (*