Merge PR #8773: [checker] Refactor by sharing code with the kernel

1 files changed, 36 insertions, 0 deletions

diff --git a/checker/checkTypes.ml b/checker/checkTypes.ml
new file mode 100644
index 0000000000..7eaa5eedd5
--- /dev/null
+++ b/checker/checkTypes.ml
@@ -0,0 +1,36 @@
+(************************************************************************)
+(*         *   The Coq Proof Assistant / The Coq Development Team       *)
+(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2018       *)
+(* <O___,, *       (see CREDITS file for the list of authors)           *)
+(*   \VV/  **************************************************************)
+(*    //   *    This file is distributed under the terms of the         *)
+(*         *     GNU Lesser General Public License Version 2.1          *)
+(*         *     (see LICENSE file for the text of the license)         *)
+(************************************************************************)
+
+open Util
+open Term
+open Constr
+open Declarations
+open Reduction
+open Environ
+
+(* Polymorphic arities utils *)
+
+let check_kind env ar u =
+  match Constr.kind (snd (dest_prod env ar)) with
+  | Sort (Type u') when Univ.Universe.equal u' (Univ.Universe.make u) -> ()
+  | _ -> failwith "not the correct sort"
+
+let check_polymorphic_arity env params par =
+  let pl = par.template_param_levels in
+  let rec check_p env pl params =
+    let open Context.Rel.Declaration in
+    match pl, params with
+        Some u::pl, LocalAssum (na,ty)::params ->
+          check_kind env ty u;
+          check_p (push_rel (LocalAssum (na,ty)) env) pl params
+      | None::pl,d::params -> check_p (push_rel d env) pl params
+      | [], _ -> ()
+      | _ -> failwith "check_poly: not the right number of params" in
+  check_p env pl (List.rev params)