| // Copyright 2014 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. |
| |
| // pretty-expanded FIXME #23616 |
| |
| pub trait Promisable: Send + Sync {} |
| impl<T: Send + Sync> Promisable for T {} |
| |
| pub fn propagate<'a, T, E, F, G>(mut action: F) |
| -> Box<FnMut(Result<T, E>) -> Result<T, E> + 'a> |
| where |
| T: Promisable + Clone + 'a, |
| E: Promisable + Clone + 'a, |
| F: FnMut(&T) -> Result<T, E> + Send + 'a, |
| G: FnMut(Result<T, E>) -> Result<T, E> + 'a { |
| Box::new(move |result: Result<T, E>| { |
| match result { |
| Ok(ref t) => action(t), |
| Err(ref e) => Err(e.clone()), |
| } |
| }) |
| } |
| |
| fn main() {} |
