From a4c7f8bd98be2a200489325ff7c5061cf80ab4f3 Mon Sep 17 00:00:00 2001
From: Enrico Tassi <gareuselesinge@debian.org>
Date: Tue, 27 Dec 2016 16:53:30 +0100
Subject: Imported Upstream version 8.6

---
 lib/cSig.mli | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'lib/cSig.mli')

diff --git a/lib/cSig.mli b/lib/cSig.mli
index e095c82c..151cfbdc 100644
--- a/lib/cSig.mli
+++ b/lib/cSig.mli
@@ -14,6 +14,8 @@ type ('a, 'b) union = Inl of 'a | Inr of 'b
 type 'a until = Stop of 'a | Cont of 'a
 (** Used for browsable-until structures. *)
 
+type (_, _) eq = Refl : ('a, 'a) eq
+
 module type SetS =
 sig
     type elt
@@ -46,6 +48,8 @@ end
 (** Redeclaration of OCaml set signature, to preserve compatibility. See OCaml
     documentation for more information. *)
 
+module type EmptyS = sig end
+
 module type MapS =
 sig
     type key
-- 
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