basic_serial_port and async_read_until

Question

I'm trying to use a boost::shared_ptr with async_read_until and cannot get it to work. This is my simplified code:

header

boost::asio::io_service io_service;
typedef boost::shared_ptr<boost::asio::serial_port> serial_port_ptr;
serial_port_ptr serial_port;
boost::asio::streambuf response_data;
char delimiter = '\n';
boost::system::error_code error;

connect

serial_port = serial_port_ptr(new boost::asio::serial_port(io_service));
serial_port->open("/dev/ttyS0", error);

read

boost::asio::async_read_until(
  serial_port.get(), response_data, delimiter,
  boost::bind(
    &serial_comm::data_received,
      this, boost::asio::placeholders::error,
      boost::asio::placeholders::bytes_transferred
  )
);

The error I get is no type named 'type' in 'struct std::enable_if<false, void>' . Thank you.

Answer 1

You've provided a pointer as the input to boost::asio::async_read_until instead of a reference. It should be rewritten like so:

boost::asio::async_read_until(
  *serial_port, response_data, delimiter,
  boost::bind(
    &serial_comm::data_received,
      this, boost::asio::placeholders::error,
      boost::asio::placeholders::bytes_transferred
  )
);