logical operators on objects?

[nocturna_gr]

Hi,
i saw this somewhere:

			mysqlpp::Row row;
			mysqlpp::Result result = query.store();


if
(result && (result.num_rows() > 0) && (row = result.at(0)))  {
...
}

"Row" and "Result" are objects... What is the meaning of applying the AND operator on objects?

Thanks