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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// 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. This file may not be copied, modified, or distributed
// except according to those terms.
// compile-pass
#![allow(dead_code, unused)]
#![feature(futures_api)]
use std::task::Poll;
struct K;
struct E;
fn as_result() -> Result<(), E> {
// From Result
let K = Ok::<K, E>(K)?;
// From Poll<Result>
let _: Poll<K> = Poll::Ready::<Result<K, E>>(Ok(K))?;
// From Poll<Option<Result>>
let _: Poll<Option<K>> = Poll::Ready::<Option<Result<K, E>>>(None)?;
Ok(())
}
fn as_poll_result() -> Poll<Result<(), E>> {
// From Result
let K = Ok::<K, E>(K)?;
// From Poll<Result>
let _: Poll<K> = Poll::Ready::<Result<K, E>>(Ok(K))?;
// From Poll<Option<Result>>
let _: Poll<Option<K>> = Poll::Ready::<Option<Result<K, E>>>(None)?;
Poll::Ready(Ok(()))
}
fn as_poll_option_result() -> Poll<Option<Result<(), E>>> {
// From Result
let K = Ok::<K, E>(K)?;
// From Poll<Result>
let _: Poll<K> = Poll::Ready::<Result<K, E>>(Ok(K))?;
// From Poll<Option<Result>>
let _: Poll<Option<K>> = Poll::Ready::<Option<Result<K, E>>>(None)?;
Poll::Ready(Some(Ok(())))
}
fn main() {
}
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