void select_from_table(db_func_t use_table) { use_table("employees"); // code to select data from the employees table } // calling the function with a lambda function to specify the table select_from_table([](const char* table_name) { std::cout << "Using table " << table_name << std::endl; });
void insert_into_table(db_func_t use_table) { use_table("orders"); // code to insert data into the orders table } // calling the function with a static function pointer to specify the table static void use_custom_table(const char* table_name) { std::cout << "Using custom table " << table_name << std::endl; } insert_into_table(use_custom_table);In this example, the `insert_into_table` function also takes a `db_func_t` parameter called `use_table`. This time, a static function pointer called `use_custom_table` is used to specify the table. When the function is called, the `use_custom_table` function is passed as an argument. This function will be called with the name of the desired table, and will simply print out a message saying which table is being used. It is difficult to determine the package library that `db_func_t` belongs to without more context or information. It is possible that it is a custom function pointer type defined in a user's own database library or framework.