fixed bug in coercion application, input/output swapped in unification

[helm.git] / helm / software / components / ng_kernel / nCicUntrusted.ml

diff --git a/helm/software/components/ng_kernel/nCicUntrusted.ml b/helm/software/components/ng_kernel/nCicUntrusted.ml
index 1e7432724bc7b5837a0b9e1f0c65ad121ec5f918..771568018b0d44ca99c61580e27152d2f1befad1 100644 (file)
--- a/helm/software/components/ng_kernel/nCicUntrusted.ml
+++ b/helm/software/components/ng_kernel/nCicUntrusted.ml
@@ -168,17 +168,20 @@ let clean_or_fix_dependent_abstrations ctx t =
     aux (List.map fst ctx) t
 ;;
 
-let rec fire_projection_redex () = function
+let rec fire_projection_redex on_args = function
   | C.Meta _ as t -> t
   | C.Appl(C.Const(Ref.Ref(_,Ref.Fix(fno,rno,_)) as r)::args as ol)as ot->
-      let l = List.map (fire_projection_redex ()) ol in
+      let l= if on_args then List.map (fire_projection_redex true) ol else ol in
       let t = if l == ol then ot else C.Appl l in
       let ifl,(_,_,pragma),_ = NCicEnvironment.get_checked_fixes_or_cofixes r in
       let conclude () =
-        let l' = HExtlib.sharing_map (fire_projection_redex ()) l in
-        if l == l' then t else C.Appl l'
+        if on_args then 
+          let l' = HExtlib.sharing_map (fire_projection_redex true) l in
+          if l == l' then t else C.Appl l'
+        else
+          t (* ot is the same *) 
       in
-      if (*pragma <> `Projection ||*) List.length args <= rno then conclude ()
+      if pragma <> `Projection || List.length args <= rno then conclude ()
       else
         (match List.nth args rno with
         | C.Appl (C.Const(Ref.Ref(_,Ref.Con _))::_) ->
@@ -187,15 +190,18 @@ let rec fire_projection_redex () = function
             (match NCicReduction.head_beta_reduce ~delta:max_int t with
             | C.Match (_,_,C.Appl(C.Const(Ref.Ref(_,Ref.Con (_,_,leftno)))::kargs),[pat])->
                   let _,kargs = HExtlib.split_nth leftno kargs in
-                  NCicReduction.head_beta_reduce 
-                    ~delta:max_int (C.Appl (pat :: kargs))
+        fire_projection_redex false 
+                  (NCicReduction.head_beta_reduce 
+                    ~delta:max_int (C.Appl (pat :: kargs)))
             | C.Appl(C.Match(_,_,C.Appl(C.Const(Ref.Ref(_,Ref.Con (_,_,leftno)))::kargs),[pat]) :: args) ->
                   let _,kargs = HExtlib.split_nth leftno kargs in
-                  NCicReduction.head_beta_reduce 
-                    ~delta:max_int (C.Appl (pat :: kargs @ args)) 
+        fire_projection_redex false 
+                  (NCicReduction.head_beta_reduce 
+                    ~delta:max_int (C.Appl (pat :: kargs @ args)))
             | _ -> conclude ()) 
         | _ -> conclude ())
-  | t -> NCicUtils.map (fun _ _ -> ()) () fire_projection_redex t
+  | t when on_args -> NCicUtils.map (fun _ x -> x) true fire_projection_redex t
+  | t -> t
 ;;
 
 let apply_subst ?(fix_projections=false) subst context t = 
@@ -217,7 +223,7 @@ let apply_subst ?(fix_projections=false) subst context t =
                    apply_subst subst () (NCicSubstitution.lift n t)) l))))
   | t -> NCicUtils.map (fun _ () -> ()) () (apply_subst subst) t
  in
- (if fix_projections then fire_projection_redex () else fun x -> x)
+ (if fix_projections then fire_projection_redex true else fun x -> x)
     (clean_or_fix_dependent_abstrations context (apply_subst subst () t))
 ;;