| // 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() { |
| } |