
using GLib;

public class CustomOutputStream : OutputStream {

	public override ssize_t write (uint8[] buffer, Cancellable? cancellable = null) throws IOError {
		throw new IOError.FAILED ("");
	}

	public override bool close (Cancellable? cancellable = null) throws IOError {
		return true;
	}
}

public int main (string[] args) {

	var output = new CustomOutputStream ();

	size_t bytes_written;
	output.write_all ("Hello world!".data, out bytes_written);

	return 0;
}
