| // check-pass | |
| // 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<dyn 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() {} |