| //@ check-pass |
| // Checks that we can infer a closure signature even if the `FnOnce` bound is |
| // a supertrait of the obligations we have currently registered for the Ty var. |
| |
| pub trait Receive<T, E>: FnOnce(Result<T, E>) { |
| fn receive(self, res: Result<T, E>); |
| } |
| |
| impl<T, E, F: FnOnce(Result<T, E>)> Receive<T, E> for F { |
| fn receive(self, res: Result<T, E>) { |
| self(res) |
| } |
| } |
| |
| pub trait Async<T, E> { |
| fn receive<F: Receive<T, E>>(self, f: F); |
| } |
| |
| impl<T, E> Async<T, E> for Result<T, E> { |
| fn receive<F: Receive<T, E>>(self, f: F) { |
| f(self) |
| } |
| } |
| |
| pub fn main() { |
| Ok::<u32, ()>(123).receive(|res| { |
| res.unwrap(); |
| }); |
| } |
