32 lines
580 B
Rust
32 lines
580 B
Rust
|
// edition:2018
|
||
|
|
// check-pass
|
||
|
|
|
||
|
|
async fn foo<const N: usize>(arg: [u8; N]) -> usize { arg.len() }
|
||
|
|
|
||
|
|
async fn bar<const N: usize>() -> [u8; N] {
|
||
|
|
[0; N]
|
||
|
|
}
|
||
|
|
|
||
|
|
trait Trait<const N: usize> {
|
||
|
|
fn fynn(&self) -> usize;
|
||
|
|
}
|
||
|
|
impl<const N: usize> Trait<N> for [u8; N] {
|
||
|
|
fn fynn(&self) -> usize {
|
||
|
|
N
|
||
|
|
}
|
||
|
|
}
|
||
|
|
async fn baz<const N: usize>() -> impl Trait<N> {
|
||
|
|
[0; N]
|
||
|
|
}
|
||
|
|
|
||
|
|
async fn biz<const N: usize>(v: impl Trait<N>) -> usize {
|
||
|
|
v.fynn()
|
||
|
|
}
|
||
|
|
|
||
|
|
async fn user<const N: usize>() {
|
||
|
|
let _ = foo::<N>(bar().await).await;
|
||
|
|
let _ = biz(baz::<N>().await).await;
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() { }
|