🐛 std::variant should be properly gated...

ThePhD · Mar 14, 2021 · f56b3c6 · f56b3c6
1 parent f541383
commit f56b3c6
Showing 1 changed file with 21 additions and 3 deletions.
diff --git a/include/sol/traits.hpp b/include/sol/traits.hpp
@@ -479,21 +479,39 @@ namespace sol { namespace meta {
 		template <typename T, typename U>
 		class supports_op_less_test<T, U, void_t<decltype(std::declval<T&>() < std::declval<U&>())>>
 		: public std::integral_constant<bool,
-			  !is_specialization_of_v<unqualified_t<T>, std::variant> && !is_specialization_of_v<unqualified_t<U>, std::variant>> { };
+#if SOL_IS_ON(SOL_STD_VARIANT_I_)
+			  !is_specialization_of_v<unqualified_t<T>, std::variant> && !is_specialization_of_v<unqualified_t<U>, std::variant>
+#else
+			  true
+#endif
+			  > {
+		};
 
 		template <typename T, typename U, typename = void>
 		class supports_op_equal_test : public std::false_type { };
 		template <typename T, typename U>
 		class supports_op_equal_test<T, U, void_t<decltype(std::declval<T&>() == std::declval<U&>())>>
 		: public std::integral_constant<bool,
-			  !is_specialization_of_v<unqualified_t<T>, std::variant> && !is_specialization_of_v<unqualified_t<U>, std::variant>> { };
+#if SOL_IS_ON(SOL_STD_VARIANT_I_)
+			  !is_specialization_of_v<unqualified_t<T>, std::variant> && !is_specialization_of_v<unqualified_t<U>, std::variant>
+#else
+			  true
+#endif
+			  > {
+		};
 
 		template <typename T, typename U, typename = void>
 		class supports_op_less_equal_test : public std::false_type { };
 		template <typename T, typename U>
 		class supports_op_less_equal_test<T, U, void_t<decltype(std::declval<T&>() <= std::declval<U&>())>>
 		: public std::integral_constant<bool,
-			  !is_specialization_of_v<unqualified_t<T>, std::variant> && !is_specialization_of_v<unqualified_t<U>, std::variant>> { };
+#if SOL_IS_ON(SOL_STD_VARIANT_I_)
+			  !is_specialization_of_v<unqualified_t<T>, std::variant> && !is_specialization_of_v<unqualified_t<U>, std::variant>
+#else
+			  true
+#endif
+			  > {
+		};
 
 		template <typename T, typename U, typename = void>
 		class supports_op_left_shift_test : public std::false_type { };