From 0e1aafe4df06d7f9654151e81067cdf508d6e4de Mon Sep 17 00:00:00 2001
From: Intrets <geen.inspiratie824@gmail.com>
Date: Sat, 19 Sep 2020 15:39:26 +0200
Subject: [PATCH] fix bug in checking for const in push_reference

std::is_const<T> will always be false if std::is_lvalue_reference<T> is true, we first have to strip off the reference to look at the const-ness. See https://en.cppreference.com/w/cpp/types/is_const
---
 include/sol/stack_core.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/sol/stack_core.hpp b/include/sol/stack_core.hpp
index a6f900b1..ebe8dbe6 100644
--- a/include/sol/stack_core.hpp
+++ b/include/sol/stack_core.hpp
@@ -943,7 +943,7 @@ namespace sol {
 			template <typename T, typename Arg, typename... Args>
 			int push_reference(lua_State* L, Arg&& arg, Args&&... args) {
 				using use_reference_tag = meta::all<std::is_lvalue_reference<T>,
-				     meta::neg<std::is_const<T>>,
+				     meta::neg<std::is_const<std::remove_reference_t<T>>>,
 				     meta::neg<is_lua_primitive<meta::unqualified_t<T>>>,
 				     meta::neg<is_unique_usertype<meta::unqualified_t<T>>>>;
 				using Tr = meta::conditional_t<use_reference_tag::value, detail::as_reference_tag, meta::unqualified_t<T>>;