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#![cfg(feature = "async-await-preview")]
#![feature(
rust_2018_preview,
arbitrary_self_types,
async_await,
await_macro,
futures_api,
)]
#![doc(html_root_url = "https://docs.rs/tokio-async-await/0.1.5")]
#![deny(missing_docs, missing_debug_implementations)]
#![cfg_attr(test, deny(warnings))]
//! A preview of Tokio w/ `async` / `await` support.
extern crate futures;
extern crate tokio_io;
/// Extracts the successful type of a `Poll<Result<T, E>>`.
///
/// This macro bakes in propagation of `Pending` and `Err` signals by returning early.
macro_rules! try_ready {
($x:expr) => {
match $x {
std::task::Poll::Ready(Ok(x)) => x,
std::task::Poll::Ready(Err(e)) =>
return std::task::Poll::Ready(Err(e.into())),
std::task::Poll::Pending =>
return std::task::Poll::Pending,
}
}
}
#[macro_use]
mod await;
pub mod compat;
pub mod io;
pub mod sink;
pub mod stream;
/*
pub mod prelude {
//! A "prelude" for users of the `tokio` crate.
//!
//! This prelude is similar to the standard library's prelude in that you'll
//! almost always want to import its entire contents, but unlike the standard
//! library's prelude you'll have to do so manually:
//!
//! ```
//! use tokio::prelude::*;
//! ```
//!
//! The prelude may grow over time as additional items see ubiquitous use.
pub use tokio_main::prelude::*;
#[doc(inline)]
pub use crate::async_await::{
io::{
AsyncReadExt,
AsyncWriteExt,
},
sink::{
SinkExt,
},
stream::{
StreamExt,
},
};
}
*/
// Rename the `await` macro in `std`. This is used by the redefined
// `await` macro in this crate.
#[doc(hidden)]
pub use std::await as std_await;
/*
use std::future::{Future as StdFuture};
fn run<T: futures::Future<Item = (), Error = ()>>(t: T) {
drop(t);
}
async fn map_ok<T: StdFuture>(future: T) -> Result<(), ()> {
let _ = await!(future);
Ok(())
}
/// Like `tokio::run`, but takes an `async` block
pub fn run_async<F>(future: F)
where F: StdFuture<Output = ()> + Send + 'static,
{
use async_await::compat::backward;
let future = backward::Compat::new(map_ok(future));
run(future);
unimplemented!();
}
*/
/*
/// Like `tokio::spawn`, but takes an `async` block
pub fn spawn_async<F>(future: F)
where F: StdFuture<Output = ()> + Send + 'static,
{
use crate::async_await::compat::backward;
spawn(backward::Compat::new(async || {
let _ = await!(future);
Ok(())
}));
}
*/