File: by-value-trait-dyn-compatibility.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (22 lines) | stat: -rw-r--r-- 388 bytes parent folder | download | duplicates (13) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
#![feature(unsized_locals)]
//~^ WARN the feature `unsized_locals` is incomplete

pub trait Foo {
    fn foo(self) -> String
    where
        Self: Sized;
}

struct A;

impl Foo for A {
    fn foo(self) -> String {
        format!("hello")
    }
}

fn main() {
    let x = *(Box::new(A) as Box<dyn Foo>);
    x.foo();
    //~^ERROR the `foo` method cannot be invoked on a trait object
}