X-Git-Url: http://nitlanguage.org

diff --git a/lib/serialization/serialization.nit b/lib/serialization/serialization.nit
index 3ba9968..8977baa 100644
--- a/lib/serialization/serialization.nit
+++ b/lib/serialization/serialization.nit
@@ -146,6 +146,12 @@ redef interface Object
 	#
 	# Used to determine if an object has already been serialized.
 	fun is_same_serialized(other: nullable Object): Bool do return is_same_instance(other)
+
+	# Hash value use for serialization
+	#
+	# Used in combination with `is_same_serialized`. If two objects are the same
+	# in a serialization context, they must have the same `serialization_hash`.
+	fun serialization_hash: Int do return object_id
 end
 
 # Instances of this class are not delayed and instead serialized immediately