Porting to ocaml 5

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

diff --git a/matita/components/ng_kernel/nCicUntrusted.ml b/matita/components/ng_kernel/nCicUntrusted.ml
index bd5055874822a917951454dab279a5673622ee95..e60bf7e504264c51ef5802f3f4d8057940aa715a 100644 (file)
--- a/matita/components/ng_kernel/nCicUntrusted.ml
+++ b/matita/components/ng_kernel/nCicUntrusted.ml
@@ -69,7 +69,7 @@ let metas_of_term status subst context term =
             List.fold_left (aux ctx) (i::acc) l)
     | t -> NCicUtils.fold (fun e c -> e::c) ctx aux acc t
   in
-    HExtlib.list_uniq (List.sort Pervasives.compare (aux context [] term))
+    HExtlib.list_uniq (List.sort Stdlib.compare (aux context [] term))
 ;;
 
 module NCicHash =
@@ -160,43 +160,34 @@ let clean_or_fix_dependent_abstrations status ctx t =
     aux (List.map fst ctx) t
 ;;
 
-let rec fire_projection_redex status on_args = function
+let rec fire_projection_redex status () = 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= if on_args then List.map (fire_projection_redex status true) ol else ol in
-      let t = if l == ol then ot else C.Appl l in
+  | C.Appl((C.Const(Ref.Ref(_,Ref.Fix(fno,rno,_)) as r) as hd)::args) as ot->
+      let args'= HExtlib.sharing_map (fire_projection_redex status ()) args in
+      let t = if args == args' then ot else C.Appl (hd::args') in
       let ifl,(_,_,pragma),_ = NCicEnvironment.get_checked_fixes_or_cofixes status r in
-      let conclude () =
-        if on_args then 
-          let l' = HExtlib.sharing_map (fire_projection_redex status 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 t
       else
-        (match List.nth l (rno+1) with
+        (match List.nth args' rno with
         | C.Appl (C.Const(Ref.Ref(_,Ref.Con _))::_) ->
             let _, _, _, _, fbody = List.nth ifl fno in (* fbody is closed! *)
-            let t = C.Appl (fbody::List.tl l) in
+            let t = C.Appl (fbody::args') in
             (match NCicReduction.head_beta_reduce status ~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
-                   fire_projection_redex status false 
-                    (NCicReduction.head_beta_reduce status
-                      ~delta:max_int (C.Appl (pat :: kargs)))
+                   NCicReduction.head_beta_reduce status
+                    ~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
-                   fire_projection_redex status false 
+                   fire_projection_redex status ()
                     (NCicReduction.head_beta_reduce status 
                       ~delta:max_int (C.Appl (pat :: kargs @ args)))
-            | _ -> conclude ()) 
-        | _ -> conclude ())
-  | t when on_args ->
-     NCicUtils.map status (fun _ x -> x) true (fire_projection_redex status) t
-  | t -> t
+            | _ -> assert false) 
+        | _ -> t)
+  | t ->
+     NCicUtils.map status (fun _ x -> x) () (fire_projection_redex status) t
 ;;
 
 let apply_subst status ?(fix_projections=false) subst context t = 
@@ -218,8 +209,12 @@ let apply_subst status ?(fix_projections=false) subst context t =
                    apply_subst subst () (NCicSubstitution.lift status n t)) l))))
   | t -> NCicUtils.map status (fun _ () -> ()) () (apply_subst subst) t
  in
- (if fix_projections then fire_projection_redex status true else fun x -> x)
-    (clean_or_fix_dependent_abstrations status context (apply_subst subst () t))
+  let t = apply_subst subst () t in
+  let t = clean_or_fix_dependent_abstrations status context t in
+  if fix_projections then
+   fire_projection_redex status () t
+  else
+   t
 ;;
 
 let apply_subst_context status ~fix_projections subst context =
@@ -274,7 +269,7 @@ let rec replace_in_subst i f = function
 ;;
           
 let set_kind newkind attrs = 
-  newkind :: List.filter (fun x -> not (is_kind x)) attrs 
+  (newkind :> NCic.meta_attr) :: List.filter (fun x -> not (is_kind x)) attrs 
 ;;
 
 let max_kind k1 k2 = 
@@ -287,7 +282,7 @@ let max_kind k1 k2 =
 module OT = 
   struct 
     type t = int * NCic.conjecture
-    let compare (i,_) (j,_) = Pervasives.compare i j
+    let compare (i,_) (j,_) = Stdlib.compare i j
   end
 
 module MS = HTopoSort.Make(OT)