| David Tolnay | 5533772 | 2016-09-11 12:58:56 -0700 | [diff] [blame] | 1 | pub trait Invoke<A> { |
| 2 | type Result; | ||||
| 3 | |||||
| 4 | fn invoke(self, arg: A) -> Self::Result; | ||||
| 5 | } | ||||
| 6 | |||||
| 7 | #[derive(Copy, Clone)] | ||||
| 8 | pub struct Identity; | ||||
| 9 | |||||
| 10 | impl<A> Invoke<A> for Identity { | ||||
| 11 | type Result = A; | ||||
| 12 | |||||
| David Tolnay | daaf774 | 2016-10-03 11:11:43 -0700 | [diff] [blame] | 13 | fn invoke(self, arg: A) -> A { |
| 14 | arg | ||||
| 15 | } | ||||
| David Tolnay | 5533772 | 2016-09-11 12:58:56 -0700 | [diff] [blame] | 16 | } |