#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::borrow::Borrow;
fn check<T: Borrow<str>>(s: T) {
    assert_eq!("Hello", s.borrow());
}
fn main() {
    let s = "Hello".to_string();
    check(s);
    let s = "Hello";
    check(s);
}