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-rw-r--r--kernel/reduction.ml12
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/reduction.ml b/kernel/reduction.ml
index 159d2ea66..da7042713 100644
--- a/kernel/reduction.ml
+++ b/kernel/reduction.ml
@@ -882,6 +882,18 @@ let hnf_prod_app env t n =
let hnf_prod_applist env t nl =
List.fold_left (hnf_prod_app env) t nl
+let hnf_prod_applist_assum env n c l =
+ let rec app n subst t l =
+ if Int.equal n 0 then
+ if l == [] then substl subst t
+ else anomaly (Pp.str "Too many arguments.")
+ else match kind (whd_allnolet env t), l with
+ | Prod(_,_,c), arg::l -> app (n-1) (arg::subst) c l
+ | LetIn(_,b,_,c), _ -> app (n-1) (substl subst b::subst) c l
+ | _, [] -> anomaly (Pp.str "Not enough arguments.")
+ | _ -> anomaly (Pp.str "Not enough prod/let's.") in
+ app n [] c l
+
(* Dealing with arities *)
let dest_prod env =