Function main

Exercises/Modules/Chapter 18/Soln18_03/Soln18_03.cpp:19–61

void print(std::ostream& stream, const Customer& customer);   // Print a given customer to a given output stream

int main()
{
  DBConnectionRAII connection{ db_connect() };
  /*
    DBConnectionRAII copy{ connection };  // Will not compile (copy constructor is deleted)
  
    DBConnectionRAII otherConnection{ db_connect() };
    otherConnection = connection;         // Will not compile (copy assignment operator is deleted)
  */
  try
  {
    DBQueryResultRAII result{ db_query(connection, "SELECT * FROM CUSTOMER_TABEL") };
    if (!result)
    {
      throw DatabaseException{"Query failed"};
    }
  
  /*
    DBQueryResultRAII copy{ result };    // Will not compile (copy constructor is deleted)
  
    DBQueryResultRAII otherResult{ db_query(connection, "SELECT * FROM CUSTOMER_TABEL") };
    otherResult = result;                // Will not compile (copy assignment operator is deleted)
  */
  
    std::vector<Customer> customers{ readCustomers(result) };
  
  if (customers.empty())
  {
    std::cerr << "No customers found?" << std::endl;
    return 2;
  }
    
  for (auto& customer : customers)
  {
     print(std::cout, customer);
  }
  }
  catch (std::exception& caught)
  {
    std::cerr << caught.what() << std::endl;
    return 1;
  }
}

std::vector<Customer> readCustomers(DB_QUERY_RESULT* result)
{