tokio/tokio-channel/tests/support/mod.rs

use futures::Future;

pub trait ForgetExt {
    fn forget(self);
}

impl<F> ForgetExt for F
    where F: Future + Sized + Send + 'static,
          F::Item: Send,
          F::Error: Send
{
    fn forget(self) {
        use std::thread;
        thread::spawn(|| self.wait());
    }
}