#![feature(return_position_impl_trait_in_trait)] | |
#![allow(incomplete_features)] | |
use std::fmt::Display; | |
trait Foo { | |
fn bar(&self) -> impl Display; | |
} | |
impl Foo for () { | |
fn bar(&self) -> impl Display { | |
"Hello, world" | |
} | |
} | |
fn main() { | |
let x: &str = ().bar(); | |
//~^ ERROR mismatched types | |
} |