use io_arc::IoArc;
use std::io::{self, prelude::*};
use std::net::TcpListener;
#[allow(unused)]
fn run() -> io::Result<()> {
let listener = TcpListener::bind("127.0.0.1:8080")?;
let (stream, _) = listener.accept()?;
let mut stream = IoArc::new(stream);
let mut stream = check_traits(stream);
stream.write(b"hello world")?; Ok(())
}
fn check_traits<S>(s: S) -> S
where
S: Clone + Read + Write,
{
s
}