Function get_as_upvalues

include/sol/stack.hpp:114–122

			template <typename T>
			inline std::pair<T, int> get_as_upvalues(lua_State* L, int index = 2) {
				static const std::size_t data_t_count = (sizeof(T) + (sizeof(void*) - 1)) / sizeof(void*);
				typedef std::array<void*, data_t_count> data_t;
				data_t voiddata { {} };
				for (std::size_t i = 0, d = 0; d < sizeof(T); ++i, d += sizeof(void*)) {
					voiddata[i] = lua_touserdata(L, upvalue_index(index++));
				}
				return std::pair<T, int>(*reinterpret_cast<T*>(static_cast<void*>(voiddata.data())), index);
			}

			template <typename T>
			inline std::pair<T, int> get_as_upvalues_using_function(lua_State* L, int function_index = -1) {