rust/tests/ui/coercion/issue-3794.rs
2024-02-16 20:02:50 +00:00

33 lines
409 B
Rust

//@ run-pass
#![allow(dead_code)]
trait T {
fn print(&self);
}
#[derive(Debug)]
struct S {
s: isize,
}
impl T for S {
fn print(&self) {
println!("{:?}", self);
}
}
fn print_t(t: &dyn T) {
t.print();
}
fn print_s(s: &S) {
s.print();
}
pub fn main() {
let s: Box<S> = Box::new(S { s: 5 });
print_s(&*s);
let t: Box<dyn T> = s as Box<dyn T>;
print_t(&*t);
}