From ec97dac6512d987dfef8b854b8db4d8e32127f38 Mon Sep 17 00:00:00 2001
From: ThePhD <phdofthehouse@gmail.com>
Date: Sun, 21 Aug 2016 19:20:31 -0400
Subject: [PATCH] push_reference must respect unique_usertypes are primitives

---
 sol/types.hpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sol/types.hpp b/sol/types.hpp
index 0cafa82e..462047ae 100644
--- a/sol/types.hpp
+++ b/sol/types.hpp
@@ -620,6 +620,9 @@ namespace sol {
 		struct accumulate<C, v, V, T, Args...> : accumulate<C, v + V<T>::value, V, Args...> {};
 	} // detail
 
+	template <typename T>
+	struct is_unique_usertype : std::integral_constant<bool, unique_usertype_traits<T>::value> {};
+
 	template <typename T>
 	struct lua_type_of : detail::lua_type_of<T> {};
 
@@ -636,6 +639,7 @@ namespace sol {
 	struct is_lua_primitive : std::integral_constant<bool,
 		type::userdata != lua_type_of<meta::unqualified_t<T>>::value
 		|| (lua_size<T>::value > 1)
+		|| is_unique_usertype<T>::value
 		|| std::is_base_of<reference, meta::unqualified_t<T>>::value
 		|| std::is_base_of<stack_reference, meta::unqualified_t<T>>::value
 		|| meta::is_specialization_of<std::tuple, meta::unqualified_t<T>>::value
@@ -662,9 +666,6 @@ namespace sol {
 	template <typename T>
 	struct is_proxy_primitive : is_lua_primitive<T> { };
 
-	template <typename T>
-	struct is_unique_usertype : std::integral_constant<bool, unique_usertype_traits<T>::value> {};
-
 	template <typename T>
 	struct is_transparent_argument : std::false_type {};