24 lines
511 B
Rust
24 lines
511 B
Rust
|
#![feature(unsized_locals)]
|
||
|
|
#![allow(incomplete_features)]
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
pub trait Foo {
|
||
|
|
fn foo(self) -> String;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct A;
|
||
|
|
|
||
|
|
impl Foo for A {
|
||
|
|
fn foo(self) -> String {
|
||
|
|
format!("hello")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
let x = *(Box::new(A) as Box<dyn Foo>); //~ERROR unsized locals are not supported
|
||
|
|
assert_eq!(x.foo(), format!("hello"));
|
||
|
|
|
||
|
|
// I'm not sure whether we want this to work
|
||
|
|
let x = Box::new(A) as Box<dyn Foo>;
|
||
|
|
assert_eq!(x.foo(), format!("hello"));
|
||
|
|
}
|