pointers just wanna be included in the fun, man

include/sol/stack_core.hpp

@@ -530,14 +530,18 @@ namespace sol {
 		}
 
 		struct properties_enrollment_allowed {
+			int& times_through;
 			std::bitset<64>& properties;
 			automagic_enrollments& enrollments;
 
-			properties_enrollment_allowed(std::bitset<64>& props, automagic_enrollments& enroll) : properties(props), enrollments(enroll) {
+			properties_enrollment_allowed(int& times, std::bitset<64>& props, automagic_enrollments& enroll) : times_through(times), properties(props), enrollments(enroll) {
 			}
 
 			bool operator()(meta_function mf) const {
 				bool p = properties[static_cast<int>(mf)];
+				if (times_through > 0) {
+					return p;
+				}
 				switch (mf) {
 				case meta_function::length:
 					return enrollments.length_operator && !p;

include/sol/usertype_storage.hpp

@@ -965,7 +965,7 @@ namespace sol { namespace u_detail {
 		// add intrinsics
 		// this one is the actual meta-handling table,
 		// the next one will be the one for
-
+		int for_each_backing_metatable_calls = 0;
 		auto for_each_backing_metatable = [&](lua_State* L, submetatable_type smt, reference& fast_index_table) {
 			// Pointer types, AKA "references" from C++
 			const char* metakey = nullptr;
@@ -1039,8 +1039,8 @@ namespace sol { namespace u_detail {
 			stack::set_field<false, true>(L, detail::base_class_check_key(), reinterpret_cast<void*>(&detail::inheritance<T>::type_check), t.stack_index());
 			stack::set_field<false, true>(L, detail::base_class_cast_key(), reinterpret_cast<void*>(&detail::inheritance<T>::type_cast), t.stack_index());
 
-			auto prop_fx = detail::properties_enrollment_allowed(storage.properties, enrollments);
+			auto prop_fx = detail::properties_enrollment_allowed(for_each_backing_metatable_calls, storage.properties, enrollments);
-			auto insert_fx = [&L, &t, &storage](meta_function mf, lua_CFunction reg) {
+			auto insert_fx = [&L, &t, &storage, &smt](meta_function mf, lua_CFunction reg) {
 				stack::set_field<false, true>(L, mf, reg, t.stack_index());
 				storage.properties[static_cast<int>(mf)] = true;
 			};
@@ -1082,6 +1082,7 @@ namespace sol { namespace u_detail {
 				storage.is_using_new_index = true;
 			}
 
+			++for_each_backing_metatable_calls;
 			fast_index_table = reference(L, t);
 			t.pop();
 		};

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 2019-05-27 05:35:30.258702 UTC
+// Generated 2019-05-29 20:53:05.788092 UTC
-// This header was generated with sol v3.0.2 (revision e814868)
+// This header was generated with sol v3.0.2 (revision 46a2b01)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_FORWARD_HPP

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 2019-05-27 05:35:29.780976 UTC
+// Generated 2019-05-29 20:53:04.799735 UTC
-// This header was generated with sol v3.0.2 (revision e814868)
+// This header was generated with sol v3.0.2 (revision 46a2b01)
 // https://github.com/ThePhD/sol2
 
 #ifndef SOL_SINGLE_INCLUDE_HPP
@@ -9682,14 +9682,18 @@ namespace sol {
 		}
 
 		struct properties_enrollment_allowed {
+			int& times_through;
 			std::bitset<64>& properties;
 			automagic_enrollments& enrollments;
 
-			properties_enrollment_allowed(std::bitset<64>& props, automagic_enrollments& enroll) : properties(props), enrollments(enroll) {
+			properties_enrollment_allowed(int& times, std::bitset<64>& props, automagic_enrollments& enroll) : times_through(times), properties(props), enrollments(enroll) {
 			}
 
 			bool operator()(meta_function mf) const {
 				bool p = properties[static_cast<int>(mf)];
+				if (times_through > 0) {
+					return p;
+				}
 				switch (mf) {
 				case meta_function::length:
 					return enrollments.length_operator && !p;
@@ -11686,8 +11690,7 @@ namespace sol { namespace stack {
 		static decltype(auto) get(lua_State* L, int index, record& tracking) {
 			using Tu = meta::unqualified_t<X>;
 			static constexpr bool is_userdata_of_some_kind
-				= !std::is_reference_v<
+				= !std::is_reference_v<X> && is_container_v<Tu> && std::is_default_constructible_v<Tu> && !is_lua_primitive_v<Tu> && !is_transparent_argument_v<Tu>;
-				       X> && is_container_v<Tu> && std::is_default_constructible_v<Tu> && !is_lua_primitive_v<Tu> && !is_transparent_argument_v<Tu>;
 			if constexpr (is_userdata_of_some_kind) {
 				if (type_of(L, index) == type::userdata) {
 					return static_cast<Tu>(stack_detail::unchecked_unqualified_get<Tu>(L, index, tracking));
@@ -21676,7 +21679,7 @@ namespace sol { namespace u_detail {
 		// add intrinsics
 		// this one is the actual meta-handling table,
 		// the next one will be the one for
-
+		int for_each_backing_metatable_calls = 0;
 		auto for_each_backing_metatable = [&](lua_State* L, submetatable_type smt, reference& fast_index_table) {
 			// Pointer types, AKA "references" from C++
 			const char* metakey = nullptr;
@@ -21750,8 +21753,8 @@ namespace sol { namespace u_detail {
 			stack::set_field<false, true>(L, detail::base_class_check_key(), reinterpret_cast<void*>(&detail::inheritance<T>::type_check), t.stack_index());
 			stack::set_field<false, true>(L, detail::base_class_cast_key(), reinterpret_cast<void*>(&detail::inheritance<T>::type_cast), t.stack_index());
 
-			auto prop_fx = detail::properties_enrollment_allowed(storage.properties, enrollments);
+			auto prop_fx = detail::properties_enrollment_allowed(for_each_backing_metatable_calls, storage.properties, enrollments);
-			auto insert_fx = [&L, &t, &storage](meta_function mf, lua_CFunction reg) {
+			auto insert_fx = [&L, &t, &storage, &smt](meta_function mf, lua_CFunction reg) {
 				stack::set_field<false, true>(L, mf, reg, t.stack_index());
 				storage.properties[static_cast<int>(mf)] = true;
 			};
@@ -21793,6 +21796,7 @@ namespace sol { namespace u_detail {
 				storage.is_using_new_index = true;
 			}
 
+			++for_each_backing_metatable_calls;
 			fast_index_table = reference(L, t);
 			t.pop();
 		};

tests/runtime_tests/source/operators.cpp

@@ -29,8 +29,9 @@
 #include <numeric>
 #include <iostream>
 
+struct T {};
+
 TEST_CASE("operators/default", "test that generic equality operators and all sorts of equality tests can be used") {
-	struct T {};
 	struct U {
 		int a;
 		U(int x = 20) : a(x) {
@@ -186,6 +187,31 @@ TEST_CASE("operators/default", "test that generic equality operators and all sor
 	}
 }
 
+TEST_CASE("operators/default with pointers", "test that default operations still work when working with reference (pointer) types") {
+	sol::state lua;
+	lua.open_libraries(sol::lib::base);
+
+	lua.new_usertype<T>("T");
+
+	T test;
+
+	lua["t1"] = &test;
+	lua["t2"] = &test;
+	lua["t3"] = std::unique_ptr<T, no_delete>(&test);
+	lua["t4"] = std::unique_ptr<T, no_delete>(&test);
+
+	lua.script("ptr_test = t1 == t2");
+	lua.script("ptr_unique_test = t1 == t3");
+	lua.script("unique_test = t3 == t4");
+
+	bool ptr_test = lua["ptr_test"];
+	bool ptr_unique_test = lua["ptr_unique_test"];
+	bool unique_test = lua["unique_test"];
+	REQUIRE(ptr_test);
+	REQUIRE(ptr_unique_test);
+	REQUIRE(unique_test);
+}
+
 TEST_CASE("operators/call", "test call operator generation") {
 	struct callable {
 		int operator()(int a, std::string b) {

tests/runtime_tests/source/sol_test.hpp

@@ -65,4 +65,11 @@ struct test_stack_guard {
 	}
 };
 
+struct no_delete {
+	template <typename P>
+	void operator()(P) const noexcept {
+
+	}
+};
+
 #endif // SOL_TESTS_SOL_TEST_HPP