Get the last error associated with the stream.

const asio::error_code & error() const;

Return Value

An error_code corresponding to the last error from the stream.

Example

To print the error associated with a failure to establish a connection:

tcp::iostream s("www.boost.org", "http");
if (!s)
{
  std::cout << "Error: " << s.error().message() << std::endl;
}