| // build-pass (FIXME(62277): could be 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() {} |