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// Copyright (c) 2016 Anatoly Ikorsky
//
// Licensed under the Apache License, Version 2.0
// <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> or the MIT
// license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. All files in the project carrying such notice may not be copied,
// modified, or distributed except according to those terms.
macro_rules! steps {
($fut:ty { $($step:ident($ty:ty),)+ }) => (
enum Step {
$($step($ty),)+
}
enum Out {
$($step(<$ty as Future>::Item),)+
}
impl $fut {
fn either_poll(&mut self) -> Result<Async<Out>> {
match self.step {
$(Step::$step(ref mut fut) => Ok(Ready(Out::$step(try_ready!(fut.poll())))),)+
}
}
}
);
}