From 855d480049c6494d9b95500d81ae6e2b056683a4 Mon Sep 17 00:00:00 2001
From: Ubpa <ustczt@mail.ustc.edu.cn>
Date: Sun, 2 Aug 2020 12:57:45 +0800
Subject: [PATCH] variable name is_const -> ret_is_const

`is_const` will get some strange messages in VS 2019
maybe it is conflicted with `std::is_const`
---
 include/sol/call.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/sol/call.hpp b/include/sol/call.hpp
index 2e9ae2d9..2ff17f9b 100644
--- a/include/sol/call.hpp
+++ b/include/sol/call.hpp
@@ -524,8 +524,8 @@ namespace sol {
 					else {
 						using traits_type = lua_bind_traits<F>;
 						using return_type = typename traits_type::return_type;
-						constexpr bool is_const = std::is_const_v<std::remove_reference_t<return_type>>;
-						if constexpr (is_const) {
+						constexpr bool ret_is_const = std::is_const_v<std::remove_reference_t<return_type>>;
+						if constexpr (ret_is_const) {
 							(void)fx;
 							(void)detail::swallow{ 0, (static_cast<void>(args), 0)... };
 							return luaL_error(L, "sol: cannot write to a readonly (const) variable");