From 077448bfc8c405bcac19a8eb462580801c20d2a2 Mon Sep 17 00:00:00 2001
From: Rohlem <lhoermann@student.tgm.ac.at>
Date: Thu, 6 Jul 2017 16:05:51 +0200
Subject: [PATCH] enable move semantics when pushing rvalue optional

add forward_like-style cast to stack::pusher<optional<O>>
---
 sol/stack_push.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sol/stack_push.hpp b/sol/stack_push.hpp
index a974bc69..a7d690d3 100644
--- a/sol/stack_push.hpp
+++ b/sol/stack_push.hpp
@@ -26,6 +26,7 @@
 #include "raii.hpp"
 #include "optional.hpp"
 #include <memory>
+#include <type_traits>
 #ifdef SOL_CODECVT_SUPPORT
 #include <codecvt>
 #include <locale>
@@ -703,7 +704,7 @@ namespace sol {
 				if (t == nullopt) {
 					return stack::push(L, nullopt);
 				}
-				return stack::push(L, t.value());
+				return stack::push(L, static_cast<std::conditional_t<std::is_lvalue_reference<T>::value, O&, O&&>>(t.value()));
 			}
 		};