exception Subst_not_found of int
exception Meta_not_found of int
+let head_beta_reduce = ref (fun ~upto:_ _ -> assert false);;
+let set_head_beta_reduce = (:=) head_beta_reduce;;
+
let expand_local_context = function
| C.Irl len ->
let rec aux acc = function
| C.Rel _ as t -> t
| C.Appl [] | C.Appl [_] -> assert false
| C.Appl l as orig ->
- (match HExtlib.sharing_map (f k) l with
+ let fire_beta, upto =
+ match l with C.Meta _ :: _ -> true, List.length l - 1 | _ -> false, 0
+ in
+ let l1 = HExtlib.sharing_map (f k) l in
+ if l == l1 then orig else
+ let t =
+ match l1 with
| C.Appl l :: tl -> C.Appl (l@tl)
- | l1 when l == l1 -> orig
- | l1 -> C.Appl l1)
+ | l1 -> C.Appl l1
+ in
+ if fire_beta then !head_beta_reduce ~upto t
+ else t
| C.Prod (n,s,t) as orig ->
let s1 = f k s in let t1 = f (g (n,C.Decl s) k) t in
if t1 == t && s1 == s then orig else C.Prod (n,s1,t1)