rust/tests/ui/traits/multidispatch1.rs
2023-01-11 09:32:08 +00:00

34 lines
555 B
Rust

// run-pass
use std::fmt::Debug;
trait MyTrait<T> {
fn get(&self) -> T;
}
#[derive(Copy, Clone)]
struct MyType {
dummy: usize
}
impl MyTrait<usize> for MyType {
fn get(&self) -> usize { self.dummy }
}
impl MyTrait<u8> for MyType {
fn get(&self) -> u8 { self.dummy as u8 }
}
fn test_eq<T,M>(m: M, v: T)
where T : Eq + Debug,
M : MyTrait<T>
{
assert_eq!(m.get(), v);
}
pub fn main() {
let value = MyType { dummy: 256 + 22 };
test_eq::<usize, _>(value, value.dummy);
test_eq::<u8, _>(value, value.dummy as u8);
}