method TcpStream.connect

use std.net { SocketAddr, TcpStream }

fn main() -> () | ParseError  io, net {
  // nothing listens on port 1
  match TcpStream.connect(SocketAddr.parse("127.0.0.1:1")!, 1s) {
    TcpStream c => {
      print("connected")
      _ = c.close()
    }
    Unavailable _ => print("refused")
    NetError _ => print("other error")
  }
}

refused