now we start making a half-dozen commits trying to appease the various forms of clang++ and g++

examples/usertype_automatic_operators.cpp

@@ -17,7 +17,7 @@ public:
 
 	// automatically bound to obj( args... ) [ __call ]
 	void operator()() {
-		data.push_back(static_cast<double>(data.size() + 1) / 3.0);
+		data.push_back(static_cast<value_type>(data.size() + 1) / 3.0);
 	}
 
 	// automatically used for pairs(obj) [ __pairs ], 5.2+

sol/forward.hpp

@@ -101,6 +101,8 @@ namespace sol {
 	template <typename T>
 	struct as_table_t;
 	template <typename T>
+	struct as_container_t;
+	template <typename T>
 	struct nested;
 	template <typename T>
 	struct light;

sol/simple_usertype_metatable.hpp

@@ -332,9 +332,6 @@ namespace sol {
 			(void)detail::swallow{ 0,
 				(add(L, detail::forward_get<I * 2>(args), detail::forward_get<I * 2 + 1>(args)),0)...
 			};
-			std::array<luaL_Reg, 29> regs{};
-			int index = 0;
-
 		}
 
 		template<typename... Args>
@@ -430,6 +427,8 @@ namespace sol {
 							case meta_function::new_index:
 								umx.newindexfunc = second;
 								break;
+							default:
+								break;
 							}
 						}
 						break;

test_operators.cpp

@@ -201,7 +201,7 @@ TEST_CASE("operators/container-like", "test that generic begin/end and iterator
 		typedef int* iterator;
 		typedef int value_type;
 
-		int values[10];
+		value_type values[10];
 
 		container() {
 			std::iota(begin(), end(), 1);

test_state.cpp

@@ -331,7 +331,7 @@ TEST_CASE("state/script, do, and load", "test success and failure cases for load
 	const static std::string good = "a = 21\nreturn a";
 	static const char file_good[] = "./temp.good.lua";
 	static std::once_flag flag_file_bs = {}, flag_file_br = {}, flag_file_g = {};
-	static std::atomic<int> finished = 0;
+	static std::atomic<int> finished(0);
 	std::call_once(flag_file_bs, write_file_attempt_object(), file_bad_syntax, bad_syntax);
 	std::call_once(flag_file_br, write_file_attempt_object(), file_bad_runtime, bad_runtime);
 	std::call_once(flag_file_g, write_file_attempt_object(), file_good, good);