fn take_until<U, O>(self, until: U) -> TakeUntil<Self, U::Future, O>
    where
        U: IntoFuture<Item = O, Error = ()>,
        Self: Sized,
    {
        TakeUntil {
            stream: self,
            until: until.into_future(),
            until_res: None,
            free: false,
        }
    }
/// Take elements from this stream until the given future resolves.
///
/// This function will take elements from this stream until the given future resolves. Once it
/// resolves, the stream will yield `None`, and produce no further elements.
///
/// If the future produces an error, the stream will be allowed to continue indefinitely.
///
/// ```
/// # extern crate stream_cancel;
/// extern crate tokio;
/// extern crate futures;
///
/// use stream_cancel::StreamExt;
/// use tokio01::prelude::*;
///
/// let listener = tokio01::net::TcpListener::bind(&"0.0.0.0:0".parse().unwrap()).unwrap();
/// let (tx, rx) = futures01::sync::oneshot::channel();
///
/// let mut rt = tokio01::runtime::Runtime::new().unwrap();
/// rt.spawn(
///     listener
///         .incoming()
///         .take_until(rx.map_err(|_| ()))
///         .map_err(|e| eprintln!("accept failed = {:?}", e))
///         .for_each(|sock| {
///             let (reader, writer) = sock.split();
///             tokio01::spawn(
///                 tokio01::io::copy(reader, writer)
///                     .map(|amt| println!("wrote {:?} bytes", amt))
///                     .map_err(|err| eprintln!("IO error {:?}", err)),
///             )
///         }),
/// );
///
/// // tell the listener to stop accepting new connections
/// tx.send(()).unwrap();
/// rt.shutdown_on_idle().wait().unwrap();
/// ```
Take elements from this stream until the given future resolves.
This function will take elements from this stream until the given future resolves. Once it
resolves, the stream will yield `None`, and produce no further elements.

If the future produces an error, the stream will be allowed to continue indefinitely.


Take elements from this stream until the given future resolves . This function will take elements from this stream until the given future resolves . Once it resolves the stream will yield ` None ` and produce no further elements . If the future produces an error the stream will be allowed to continue indefinitely .
fn take_until<U, O>(self, until: U) -> TakeUntil<Self, U::Future, O>
    where
        U: IntoFuture<Item = O, Error = ()>,
        Self: Sized,
    {
        TakeUntil {
            stream: self,
            until: until.into_future(),
            until_res: None,
            free: false,
        }
    }
fn take_until < U , O > ( self , until : U ) -> TakeUntil < Self , U :: Future , O > where U : IntoFuture < Item = O , Error = ( ) > , Self : Sized , { TakeUntil { stream : self , until : until . into_future ( ) , until_res : None , free : false , } }
Take elements from this stream until the given future resolves.
Take elements from this stream until the given future resolves .
self
until
U
extern crate stream_cancel;
extern crate tokio;
extern crate futures.

use stream_cancel::StreamExt;
use tokio01::prelude::*.



let mut rt = tokio01::runtime::Runtime::new().unwrap();
rt.spawn(
listener
.incoming()
.take_until(rx.map_err(|_| ()))
.map_err(|e| eprintln!("accept failed = {:?}", e))
.for_each(|sock| {
let (reader, writer) = sock.split();
tokio01::spawn(
tokio01::io::copy(reader, writer)
.map(|amt| println!("wrote {:?} bytes", amt))
.map_err(|err| eprintln!("IO error {:?}", err)),
)
}),
).

tell the listener to stop accepting new connections
tx.send(()).unwrap();
rt.shutdown_on_idle().wait().unwrap();
```
extern crate tokio ; extern crate futures . use stream_cancel :: StreamExt ; use tokio01 :: prelude :: * . let mut rt = tokio01 :: runtime :: Runtime :: new () . unwrap () ; rt . spawn ( listener . incoming () . take_until ( rx . map_err ( |_| () )) . map_err ( |e| eprintln! ( " accept failed = { : ? } " e )) . for_each ( |sock| { let ( reader writer ) = sock . split () ; tokio01 :: spawn ( tokio01 :: io :: copy ( reader writer ) . map ( |amt| println! ( " wrote { : ? } bytes " amt )) . map_err ( |err| eprintln! ( " IO error { : ? } " err )) ) } ) ) . tell the listener to stop accepting new connections tx . send (( )) . unwrap () ; rt . shutdown_on_idle () . wait () . unwrap () ; ` ` `