More documentation, fix for signed/unsigned conversion issues.

docs/source/api/table.rst

@@ -94,6 +94,15 @@ This function returns the size of a table. It is only well-defined in the case o
 
 This class of functions creates a new :doc:`usertype<usertype>` with the specified arguments, providing a few extra details for constructors. After creating a usertype with the specified argument, it passes it to :ref:`set_usertype<set_usertype>`.
 	
+.. code-block:: cpp
+	:caption: function: creating an enum
+	:name: new-enum
+
+	template<bool read_only = true, typename... Args>
+	basic_table_core& new_enum(const std::string& name, Args&&... args);
+	
+Use this function to create an enumeration type in Lua. By default, the enum will be made read-only, which creates a tiny performance hit to make the values stored in this table behave exactly like a read-only enumeration in C++. If you plan on changing the enum values in Lua, set the ``read_only`` template parameter in your ``new_enum`` call to false. The arguments are expected to come in ``key, value, key, value, ...`` list. 
+
 .. _set_usertype:
 
 .. code-block:: cpp

sol/call.hpp

@@ -299,7 +299,7 @@ namespace sol {
 			typedef sol::constructor_list<Args...> F;
 
 			static int call(lua_State* L, F&) {
-				static const auto& metakey = usertype_traits<T>::metatable;
+				const auto& metakey = usertype_traits<T>::metatable;
 				int argcount = lua_gettop(L);
 				call_syntax syntax = argcount > 0 ? stack::get_call_syntax(L, metakey, 1) : call_syntax::dot;
 				argcount -= static_cast<int>(syntax);
@@ -331,6 +331,7 @@ namespace sol {
 			struct onmatch {
 				template <typename Fx, std::size_t I, typename... R, typename... Args>
 				int operator()(types<Fx>, index_value<I>, types<R...> r, types<Args...> a, lua_State* L, int, int start, F& f) {
+					const auto& metakey = usertype_traits<T>::metatable;
 					T** pointerpointer = reinterpret_cast<T**>(lua_newuserdata(L, sizeof(T*) + sizeof(T)));
 					reference userdataref(L, -1);
 					T*& referencepointer = *pointerpointer;
@@ -341,7 +342,7 @@ namespace sol {
 					stack::call_into_lua<1, false>(r, a, L, start, func, detail::implicit_wrapper<T>(obj));
 
 					userdataref.push();
-					luaL_getmetatable(L, &usertype_traits<T>::metatable[0]);
+					luaL_getmetatable(L, &metakey[0]);
 					if (type_of(L, -1) == type::nil) {
 						lua_pop(L, 1);
 						std::string err = "sol: unable to get usertype metatable for ";

sol/stack_check.hpp

@@ -34,7 +34,8 @@ namespace sol {
 		namespace stack_detail {
 			template <typename T>
 			inline bool check_metatable(lua_State* L, int index = -2) {
-				luaL_getmetatable(L, &usertype_traits<T>::metatable[0]);
+				const auto& metakey = usertype_traits<T>::metatable;
+				luaL_getmetatable(L, &metakey[0]);
 				const type expectedmetatabletype = static_cast<type>(lua_type(L, -1));
 				if (expectedmetatabletype != type::nil) {
 					if (lua_rawequal(L, -1, index) == 1) {
@@ -272,7 +273,7 @@ namespace sol {
 					return true;
 				if (stack_detail::check_metatable<detail::unique_usertype<U>>(L))
 					return true;
-				bool success = true;
+				bool success = false;
 #ifndef SOL_NO_EXCEPTIONS
 				lua_getfield(L, -1, &detail::base_class_check_key()[0]);
 				if (type_of(L, -1) != type::nil) {

sol/stack_push.hpp

@@ -150,8 +150,8 @@ namespace sol {
 		template<typename T>
 		struct pusher<T, std::enable_if_t<meta::all<std::is_integral<T>, std::is_unsigned<T>>::value>> {
 			static int push(lua_State* L, const T& value) {
-				typedef std::make_signed_t<T> signed_int;
+				lua_pushinteger(L, static_cast<lua_Integer>(value));
-				return stack::push(L, static_cast<signed_int>(value));
+				return 1;
 			}
 		};