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// run-pass
#![allow(dead_code)]
#![allow(unused_mut)]
#![allow(unused_variables)]
use std::io::{self, Write};
trait Trait {
fn f(&self);
}
#[derive(Copy, Clone)]
struct Struct {
x: isize,
y: isize,
}
impl Trait for Struct {
fn f(&self) {
println!("Hi!");
}
}
fn foo(mut a: Box<dyn Write>) {}
pub fn main() {
let a = Struct { x: 1, y: 2 };
let b: Box<dyn Trait> = Box::new(a);
b.f();
let c: &dyn Trait = &a;
c.f();
let out = io::stdout();
foo(Box::new(out));
}
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