From 20a0b0809f67d42923ce9115a2df62c862495bb8 Mon Sep 17 00:00:00 2001
From: ThePhD <phdofthehouse@gmail.com>
Date: Sun, 31 Mar 2019 14:38:48 -0400
Subject: [PATCH] decltype(auto), let's hope it does the right thing...

---
 include/sol/usertype_container.hpp |  9 +++++----
 single/include/sol/forward.hpp     |  4 ++--
 single/include/sol/sol.hpp         | 13 +++++++------
 3 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/include/sol/usertype_container.hpp b/include/sol/usertype_container.hpp
index f00ee3e5..736f6ac0 100644
--- a/include/sol/usertype_container.hpp
+++ b/include/sol/usertype_container.hpp
@@ -564,7 +564,7 @@ namespace sol {
 			}
 
 			static detail::error_result get_associative(std::true_type, lua_State* L, iterator& it) {
-				auto& v = *it;
+				decltype(auto) v = *it;
 				return stack::stack_detail::push_reference<push_type>(L, detail::deref_non_pointer(v.second));
 			}
 
@@ -627,13 +627,13 @@ namespace sol {
 			}
 
 			static detail::error_result set_associative(std::true_type, iterator& it, stack_object value) {
-				auto& v = *it;
+				decltype(auto) v = *it;
 				v.second = value.as<V>();
 				return {};
 			}
 
 			static detail::error_result set_associative(std::false_type, iterator& it, stack_object value) {
-				auto& v = *it;
+				decltype(auto) v = *it;
 				v = value.as<V>();
 				return {};
 			}
@@ -1298,7 +1298,8 @@ namespace sol {
 				decltype(auto) value = stack::unqualified_get<value_type>(L, 2);
 				std::size_t N = std::extent<T>::value;
 				for (std::size_t idx = 0; idx < N; ++idx) {
-					const auto& v = self[idx];
+					using v_t = std::add_const_t<decltype(self[index])>;
+					v_t v = self[idx];
 					if (v == value) {
 						idx -= deferred_uc::index_adjustment(L, self);
 						return stack::push(L, idx);
diff --git a/single/include/sol/forward.hpp b/single/include/sol/forward.hpp
index 19af118a..cdb940ea 100644
--- a/single/include/sol/forward.hpp
+++ b/single/include/sol/forward.hpp
@@ -20,8 +20,8 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 // This file was generated with a script.
-// Generated 2019-03-31 03:30:36.689278 UTC
-// This header was generated with sol v3.0.1-beta2 (revision 6017f63)
+// Generated 2019-03-31 18:38:29.717261 UTC
+// This header was generated with sol v3.0.1-beta2 (revision 26cbadc)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_FORWARD_HPP
diff --git a/single/include/sol/sol.hpp b/single/include/sol/sol.hpp
index 0014dd69..06c839ee 100644
--- a/single/include/sol/sol.hpp
+++ b/single/include/sol/sol.hpp
@@ -20,8 +20,8 @@
 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 // This file was generated with a script.
-// Generated 2019-03-31 03:30:35.378291 UTC
-// This header was generated with sol v3.0.1-beta2 (revision 6017f63)
+// Generated 2019-03-31 18:38:28.701189 UTC
+// This header was generated with sol v3.0.1-beta2 (revision 26cbadc)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_HPP
@@ -19059,7 +19059,7 @@ namespace sol {
 			}
 
 			static detail::error_result get_associative(std::true_type, lua_State* L, iterator& it) {
-				auto& v = *it;
+				decltype(auto) v = *it;
 				return stack::stack_detail::push_reference<push_type>(L, detail::deref_non_pointer(v.second));
 			}
 
@@ -19122,13 +19122,13 @@ namespace sol {
 			}
 
 			static detail::error_result set_associative(std::true_type, iterator& it, stack_object value) {
-				auto& v = *it;
+				decltype(auto) v = *it;
 				v.second = value.as<V>();
 				return {};
 			}
 
 			static detail::error_result set_associative(std::false_type, iterator& it, stack_object value) {
-				auto& v = *it;
+				decltype(auto) v = *it;
 				v = value.as<V>();
 				return {};
 			}
@@ -19793,7 +19793,8 @@ namespace sol {
 				decltype(auto) value = stack::unqualified_get<value_type>(L, 2);
 				std::size_t N = std::extent<T>::value;
 				for (std::size_t idx = 0; idx < N; ++idx) {
-					const auto& v = self[idx];
+					using v_t = std::add_const_t<decltype(self[index])>;
+					v_t v = self[idx];
 					if (v == value) {
 						idx -= deferred_uc::index_adjustment(L, self);
 						return stack::push(L, idx);